TextView.java revision f14634e4917dc86a9dfd05cd0d76b530a2d4f392 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import android.R;
20import android.content.ClipData;
21import android.content.ClipData.Item;
22import android.content.ClipboardManager;
23import android.content.Context;
24import android.content.Intent;
25import android.content.pm.PackageManager;
26import android.content.res.ColorStateList;
27import android.content.res.CompatibilityInfo;
28import android.content.res.Resources;
29import android.content.res.TypedArray;
30import android.content.res.XmlResourceParser;
31import android.graphics.Canvas;
32import android.graphics.Color;
33import android.graphics.Paint;
34import android.graphics.Path;
35import android.graphics.Rect;
36import android.graphics.RectF;
37import android.graphics.Typeface;
38import android.graphics.drawable.Drawable;
39import android.inputmethodservice.ExtractEditText;
40import android.os.Bundle;
41import android.os.Handler;
42import android.os.Message;
43import android.os.Parcel;
44import android.os.Parcelable;
45import android.os.SystemClock;
46import android.provider.Settings;
47import android.text.BoringLayout;
48import android.text.DynamicLayout;
49import android.text.Editable;
50import android.text.GetChars;
51import android.text.GraphicsOperations;
52import android.text.InputFilter;
53import android.text.InputType;
54import android.text.Layout;
55import android.text.ParcelableSpan;
56import android.text.Selection;
57import android.text.SpanWatcher;
58import android.text.Spannable;
59import android.text.SpannableString;
60import android.text.SpannableStringBuilder;
61import android.text.Spanned;
62import android.text.SpannedString;
63import android.text.StaticLayout;
64import android.text.TextDirectionHeuristic;
65import android.text.TextDirectionHeuristics;
66import android.text.TextPaint;
67import android.text.TextUtils;
68import android.text.TextUtils.TruncateAt;
69import android.text.TextWatcher;
70import android.text.method.AllCapsTransformationMethod;
71import android.text.method.ArrowKeyMovementMethod;
72import android.text.method.DateKeyListener;
73import android.text.method.DateTimeKeyListener;
74import android.text.method.DialerKeyListener;
75import android.text.method.DigitsKeyListener;
76import android.text.method.KeyListener;
77import android.text.method.LinkMovementMethod;
78import android.text.method.MetaKeyKeyListener;
79import android.text.method.MovementMethod;
80import android.text.method.PasswordTransformationMethod;
81import android.text.method.SingleLineTransformationMethod;
82import android.text.method.TextKeyListener;
83import android.text.method.TimeKeyListener;
84import android.text.method.TransformationMethod;
85import android.text.method.TransformationMethod2;
86import android.text.method.WordIterator;
87import android.text.style.CharacterStyle;
88import android.text.style.ClickableSpan;
89import android.text.style.EasyEditSpan;
90import android.text.style.ParagraphStyle;
91import android.text.style.SpellCheckSpan;
92import android.text.style.SuggestionRangeSpan;
93import android.text.style.SuggestionSpan;
94import android.text.style.TextAppearanceSpan;
95import android.text.style.URLSpan;
96import android.text.style.UpdateAppearance;
97import android.text.util.Linkify;
98import android.util.AttributeSet;
99import android.util.DisplayMetrics;
100import android.util.FloatMath;
101import android.util.Log;
102import android.util.TypedValue;
103import android.view.ActionMode;
104import android.view.ActionMode.Callback;
105import android.view.DisplayList;
106import android.view.DragEvent;
107import android.view.Gravity;
108import android.view.HapticFeedbackConstants;
109import android.view.HardwareCanvas;
110import android.view.KeyCharacterMap;
111import android.view.KeyEvent;
112import android.view.LayoutInflater;
113import android.view.Menu;
114import android.view.MenuItem;
115import android.view.MotionEvent;
116import android.view.View;
117import android.view.ViewConfiguration;
118import android.view.ViewDebug;
119import android.view.ViewGroup;
120import android.view.ViewGroup.LayoutParams;
121import android.view.ViewParent;
122import android.view.ViewRootImpl;
123import android.view.ViewTreeObserver;
124import android.view.WindowManager;
125import android.view.accessibility.AccessibilityEvent;
126import android.view.accessibility.AccessibilityManager;
127import android.view.accessibility.AccessibilityNodeInfo;
128import android.view.animation.AnimationUtils;
129import android.view.inputmethod.BaseInputConnection;
130import android.view.inputmethod.CompletionInfo;
131import android.view.inputmethod.CorrectionInfo;
132import android.view.inputmethod.EditorInfo;
133import android.view.inputmethod.ExtractedText;
134import android.view.inputmethod.ExtractedTextRequest;
135import android.view.inputmethod.InputConnection;
136import android.view.inputmethod.InputMethodManager;
137import android.view.textservice.SpellCheckerSubtype;
138import android.view.textservice.TextServicesManager;
139import android.widget.AdapterView.OnItemClickListener;
140import android.widget.RemoteViews.RemoteView;
141
142import com.android.internal.util.FastMath;
143import com.android.internal.widget.EditableInputConnection;
144
145import org.xmlpull.v1.XmlPullParserException;
146
147import java.io.IOException;
148import java.lang.ref.WeakReference;
149import java.text.BreakIterator;
150import java.util.ArrayList;
151import java.util.Arrays;
152import java.util.Comparator;
153import java.util.HashMap;
154import java.util.Locale;
155
156/**
157 * Displays text to the user and optionally allows them to edit it.  A TextView
158 * is a complete text editor, however the basic class is configured to not
159 * allow editing; see {@link EditText} for a subclass that configures the text
160 * view for editing.
161 *
162 * <p>
163 * <b>XML attributes</b>
164 * <p>
165 * See {@link android.R.styleable#TextView TextView Attributes},
166 * {@link android.R.styleable#View View Attributes}
167 *
168 * @attr ref android.R.styleable#TextView_text
169 * @attr ref android.R.styleable#TextView_bufferType
170 * @attr ref android.R.styleable#TextView_hint
171 * @attr ref android.R.styleable#TextView_textColor
172 * @attr ref android.R.styleable#TextView_textColorHighlight
173 * @attr ref android.R.styleable#TextView_textColorHint
174 * @attr ref android.R.styleable#TextView_textAppearance
175 * @attr ref android.R.styleable#TextView_textColorLink
176 * @attr ref android.R.styleable#TextView_textSize
177 * @attr ref android.R.styleable#TextView_textScaleX
178 * @attr ref android.R.styleable#TextView_typeface
179 * @attr ref android.R.styleable#TextView_textStyle
180 * @attr ref android.R.styleable#TextView_cursorVisible
181 * @attr ref android.R.styleable#TextView_maxLines
182 * @attr ref android.R.styleable#TextView_maxHeight
183 * @attr ref android.R.styleable#TextView_lines
184 * @attr ref android.R.styleable#TextView_height
185 * @attr ref android.R.styleable#TextView_minLines
186 * @attr ref android.R.styleable#TextView_minHeight
187 * @attr ref android.R.styleable#TextView_maxEms
188 * @attr ref android.R.styleable#TextView_maxWidth
189 * @attr ref android.R.styleable#TextView_ems
190 * @attr ref android.R.styleable#TextView_width
191 * @attr ref android.R.styleable#TextView_minEms
192 * @attr ref android.R.styleable#TextView_minWidth
193 * @attr ref android.R.styleable#TextView_gravity
194 * @attr ref android.R.styleable#TextView_scrollHorizontally
195 * @attr ref android.R.styleable#TextView_password
196 * @attr ref android.R.styleable#TextView_singleLine
197 * @attr ref android.R.styleable#TextView_selectAllOnFocus
198 * @attr ref android.R.styleable#TextView_includeFontPadding
199 * @attr ref android.R.styleable#TextView_maxLength
200 * @attr ref android.R.styleable#TextView_shadowColor
201 * @attr ref android.R.styleable#TextView_shadowDx
202 * @attr ref android.R.styleable#TextView_shadowDy
203 * @attr ref android.R.styleable#TextView_shadowRadius
204 * @attr ref android.R.styleable#TextView_autoLink
205 * @attr ref android.R.styleable#TextView_linksClickable
206 * @attr ref android.R.styleable#TextView_numeric
207 * @attr ref android.R.styleable#TextView_digits
208 * @attr ref android.R.styleable#TextView_phoneNumber
209 * @attr ref android.R.styleable#TextView_inputMethod
210 * @attr ref android.R.styleable#TextView_capitalize
211 * @attr ref android.R.styleable#TextView_autoText
212 * @attr ref android.R.styleable#TextView_editable
213 * @attr ref android.R.styleable#TextView_freezesText
214 * @attr ref android.R.styleable#TextView_ellipsize
215 * @attr ref android.R.styleable#TextView_drawableTop
216 * @attr ref android.R.styleable#TextView_drawableBottom
217 * @attr ref android.R.styleable#TextView_drawableRight
218 * @attr ref android.R.styleable#TextView_drawableLeft
219 * @attr ref android.R.styleable#TextView_drawablePadding
220 * @attr ref android.R.styleable#TextView_lineSpacingExtra
221 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
222 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
223 * @attr ref android.R.styleable#TextView_inputType
224 * @attr ref android.R.styleable#TextView_imeOptions
225 * @attr ref android.R.styleable#TextView_privateImeOptions
226 * @attr ref android.R.styleable#TextView_imeActionLabel
227 * @attr ref android.R.styleable#TextView_imeActionId
228 * @attr ref android.R.styleable#TextView_editorExtras
229 */
230@RemoteView
231public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
232    static final String LOG_TAG = "TextView";
233    static final boolean DEBUG_EXTRACT = false;
234
235    // Enum for the "typeface" XML parameter.
236    // TODO: How can we get this from the XML instead of hardcoding it here?
237    private static final int SANS = 1;
238    private static final int SERIF = 2;
239    private static final int MONOSPACE = 3;
240
241    // Bitfield for the "numeric" XML parameter.
242    // TODO: How can we get this from the XML instead of hardcoding it here?
243    private static final int SIGNED = 2;
244    private static final int DECIMAL = 4;
245
246    private static enum TEXT_ALIGN {
247        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
248    }
249
250    /**
251     * Draw marquee text with fading edges as usual
252     */
253    private static final int MARQUEE_FADE_NORMAL = 0;
254
255    /**
256     * Draw marquee text as ellipsize end while inactive instead of with the fade.
257     * (Useful for devices where the fade can be expensive if overdone)
258     */
259    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
260
261    /**
262     * Draw marquee text with fading edges because it is currently active/animating.
263     */
264    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
265
266    private static final int LINES = 1;
267    private static final int EMS = LINES;
268    private static final int PIXELS = 2;
269
270    private static final RectF TEMP_RECTF = new RectF();
271    private static final float[] TEMP_POSITION = new float[2];
272
273    // XXX should be much larger
274    private static final int VERY_WIDE = 1024*1024;
275    private static final int BLINK = 500;
276    private static final int ANIMATED_SCROLL_GAP = 250;
277
278    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
279    private static final Spanned EMPTY_SPANNED = new SpannedString("");
280
281    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
282    private static final int CHANGE_WATCHER_PRIORITY = 100;
283
284    // New state used to change background based on whether this TextView is multiline.
285    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
286
287    // System wide time for last cut or copy action.
288    private static long LAST_CUT_OR_COPY_TIME;
289
290    private int mCurrentAlpha = 255;
291
292    private ColorStateList mTextColor;
293    private ColorStateList mHintTextColor;
294    private ColorStateList mLinkTextColor;
295    private int mCurTextColor;
296    private int mCurHintTextColor;
297    private boolean mFreezesText;
298    private boolean mTemporaryDetach;
299    private boolean mDispatchTemporaryDetach;
300
301    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
302    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
303
304    private float mShadowRadius, mShadowDx, mShadowDy;
305
306    private boolean mPreDrawRegistered;
307
308    private TextUtils.TruncateAt mEllipsize;
309
310    static class Drawables {
311        final Rect mCompoundRect = new Rect();
312        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
313                mDrawableStart, mDrawableEnd;
314        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
315                mDrawableSizeStart, mDrawableSizeEnd;
316        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
317                mDrawableHeightStart, mDrawableHeightEnd;
318        int mDrawablePadding;
319    }
320    private Drawables mDrawables;
321
322    private CharWrapper mCharWrapper;
323
324    private Marquee mMarquee;
325    private boolean mRestartMarquee;
326
327    private int mMarqueeRepeatLimit = 3;
328
329    // The alignment to pass to Layout, or null if not resolved.
330    private Layout.Alignment mLayoutAlignment;
331
332    // The default value for mTextAlign.
333    private TEXT_ALIGN mTextAlign = TEXT_ALIGN.INHERIT;
334
335    private boolean mResolvedDrawables;
336
337    /**
338     * On some devices the fading edges add a performance penalty if used
339     * extensively in the same layout. This mode indicates how the marquee
340     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
341     */
342    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
343
344    /**
345     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
346     * the layout that should be used when the mode switches.
347     */
348    private Layout mSavedMarqueeModeLayout;
349
350    @ViewDebug.ExportedProperty(category = "text")
351    private CharSequence mText;
352    private CharSequence mTransformed;
353    private BufferType mBufferType = BufferType.NORMAL;
354
355    private CharSequence mHint;
356    private Layout mHintLayout;
357
358    private MovementMethod mMovement;
359
360    private TransformationMethod mTransformation;
361    private boolean mAllowTransformationLengthChange;
362    private ChangeWatcher mChangeWatcher;
363
364    private ArrayList<TextWatcher> mListeners;
365
366    // display attributes
367    private final TextPaint mTextPaint;
368    private boolean mUserSetTextScaleX;
369    private Layout mLayout;
370
371    private int mGravity = Gravity.TOP | Gravity.START;
372    private boolean mHorizontallyScrolling;
373
374    private int mAutoLinkMask;
375    private boolean mLinksClickable = true;
376
377    private float mSpacingMult = 1.0f;
378    private float mSpacingAdd = 0.0f;
379
380    private int mMaximum = Integer.MAX_VALUE;
381    private int mMaxMode = LINES;
382    private int mMinimum = 0;
383    private int mMinMode = LINES;
384
385    private int mOldMaximum = mMaximum;
386    private int mOldMaxMode = mMaxMode;
387
388    private int mMaxWidth = Integer.MAX_VALUE;
389    private int mMaxWidthMode = PIXELS;
390    private int mMinWidth = 0;
391    private int mMinWidthMode = PIXELS;
392
393    private boolean mSingleLine;
394    private int mDesiredHeightAtMeasure = -1;
395    private boolean mIncludePad = true;
396
397    // tmp primitives, so we don't alloc them on each draw
398    private Rect mTempRect;
399    private long mLastScroll;
400    private Scroller mScroller;
401
402    private BoringLayout.Metrics mBoring, mHintBoring;
403    private BoringLayout mSavedLayout, mSavedHintLayout;
404
405    private TextDirectionHeuristic mTextDir;
406
407    private InputFilter[] mFilters = NO_FILTERS;
408
409    // Although these fields are specific to editable text, they are not added to Editor because
410    // they are defined by the TextView's style and are theme-dependent.
411    private int mHighlightColor = 0x6633B5E5;
412    private int mCursorDrawableRes;
413    // These four fields, could be moved to Editor, since we know their default values and we
414    // could condition the creation of the Editor to a non standard value. This is however
415    // brittle since the hardcoded values here (such as
416    // com.android.internal.R.drawable.text_select_handle_left) would have to be updated if the
417    // default style is modified.
418    private int mTextSelectHandleLeftRes;
419    private int mTextSelectHandleRightRes;
420    private int mTextSelectHandleRes;
421    private int mTextEditSuggestionItemLayout;
422
423    /**
424     * EditText specific data, created on demand when one of the Editor fields is used.
425     * See {@link #createEditorIfNeeded(String)}.
426     */
427    private Editor mEditor;
428
429    /*
430     * Kick-start the font cache for the zygote process (to pay the cost of
431     * initializing freetype for our default font only once).
432     */
433    static {
434        Paint p = new Paint();
435        p.setAntiAlias(true);
436        // We don't care about the result, just the side-effect of measuring.
437        p.measureText("H");
438    }
439
440    /**
441     * Interface definition for a callback to be invoked when an action is
442     * performed on the editor.
443     */
444    public interface OnEditorActionListener {
445        /**
446         * Called when an action is being performed.
447         *
448         * @param v The view that was clicked.
449         * @param actionId Identifier of the action.  This will be either the
450         * identifier you supplied, or {@link EditorInfo#IME_NULL
451         * EditorInfo.IME_NULL} if being called due to the enter key
452         * being pressed.
453         * @param event If triggered by an enter key, this is the event;
454         * otherwise, this is null.
455         * @return Return true if you have consumed the action, else false.
456         */
457        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
458    }
459
460    public TextView(Context context) {
461        this(context, null);
462    }
463
464    public TextView(Context context, AttributeSet attrs) {
465        this(context, attrs, com.android.internal.R.attr.textViewStyle);
466    }
467
468    @SuppressWarnings("deprecation")
469    public TextView(Context context, AttributeSet attrs, int defStyle) {
470        super(context, attrs, defStyle);
471        mText = "";
472
473        final Resources res = getResources();
474        final CompatibilityInfo compat = res.getCompatibilityInfo();
475
476        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
477        mTextPaint.density = res.getDisplayMetrics().density;
478        mTextPaint.setCompatibilityScaling(compat.applicationScale);
479
480        mMovement = getDefaultMovementMethod();
481
482        mTransformation = null;
483
484        int textColorHighlight = 0;
485        ColorStateList textColor = null;
486        ColorStateList textColorHint = null;
487        ColorStateList textColorLink = null;
488        int textSize = 15;
489        int typefaceIndex = -1;
490        int styleIndex = -1;
491        boolean allCaps = false;
492
493        final Resources.Theme theme = context.getTheme();
494
495        /*
496         * Look the appearance up without checking first if it exists because
497         * almost every TextView has one and it greatly simplifies the logic
498         * to be able to parse the appearance first and then let specific tags
499         * for this View override it.
500         */
501        TypedArray a = theme.obtainStyledAttributes(
502                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
503        TypedArray appearance = null;
504        int ap = a.getResourceId(
505                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
506        a.recycle();
507        if (ap != -1) {
508            appearance = theme.obtainStyledAttributes(
509                    ap, com.android.internal.R.styleable.TextAppearance);
510        }
511        if (appearance != null) {
512            int n = appearance.getIndexCount();
513            for (int i = 0; i < n; i++) {
514                int attr = appearance.getIndex(i);
515
516                switch (attr) {
517                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
518                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
519                    break;
520
521                case com.android.internal.R.styleable.TextAppearance_textColor:
522                    textColor = appearance.getColorStateList(attr);
523                    break;
524
525                case com.android.internal.R.styleable.TextAppearance_textColorHint:
526                    textColorHint = appearance.getColorStateList(attr);
527                    break;
528
529                case com.android.internal.R.styleable.TextAppearance_textColorLink:
530                    textColorLink = appearance.getColorStateList(attr);
531                    break;
532
533                case com.android.internal.R.styleable.TextAppearance_textSize:
534                    textSize = appearance.getDimensionPixelSize(attr, textSize);
535                    break;
536
537                case com.android.internal.R.styleable.TextAppearance_typeface:
538                    typefaceIndex = appearance.getInt(attr, -1);
539                    break;
540
541                case com.android.internal.R.styleable.TextAppearance_textStyle:
542                    styleIndex = appearance.getInt(attr, -1);
543                    break;
544
545                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
546                    allCaps = appearance.getBoolean(attr, false);
547                    break;
548                }
549            }
550
551            appearance.recycle();
552        }
553
554        boolean editable = getDefaultEditable();
555        CharSequence inputMethod = null;
556        int numeric = 0;
557        CharSequence digits = null;
558        boolean phone = false;
559        boolean autotext = false;
560        int autocap = -1;
561        int buffertype = 0;
562        boolean selectallonfocus = false;
563        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
564            drawableBottom = null, drawableStart = null, drawableEnd = null;
565        int drawablePadding = 0;
566        int ellipsize = -1;
567        boolean singleLine = false;
568        int maxlength = -1;
569        CharSequence text = "";
570        CharSequence hint = null;
571        int shadowcolor = 0;
572        float dx = 0, dy = 0, r = 0;
573        boolean password = false;
574        int inputType = EditorInfo.TYPE_NULL;
575
576        a = theme.obtainStyledAttributes(
577                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
578
579        int n = a.getIndexCount();
580        for (int i = 0; i < n; i++) {
581            int attr = a.getIndex(i);
582
583            switch (attr) {
584            case com.android.internal.R.styleable.TextView_editable:
585                editable = a.getBoolean(attr, editable);
586                break;
587
588            case com.android.internal.R.styleable.TextView_inputMethod:
589                inputMethod = a.getText(attr);
590                break;
591
592            case com.android.internal.R.styleable.TextView_numeric:
593                numeric = a.getInt(attr, numeric);
594                break;
595
596            case com.android.internal.R.styleable.TextView_digits:
597                digits = a.getText(attr);
598                break;
599
600            case com.android.internal.R.styleable.TextView_phoneNumber:
601                phone = a.getBoolean(attr, phone);
602                break;
603
604            case com.android.internal.R.styleable.TextView_autoText:
605                autotext = a.getBoolean(attr, autotext);
606                break;
607
608            case com.android.internal.R.styleable.TextView_capitalize:
609                autocap = a.getInt(attr, autocap);
610                break;
611
612            case com.android.internal.R.styleable.TextView_bufferType:
613                buffertype = a.getInt(attr, buffertype);
614                break;
615
616            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
617                selectallonfocus = a.getBoolean(attr, selectallonfocus);
618                break;
619
620            case com.android.internal.R.styleable.TextView_autoLink:
621                mAutoLinkMask = a.getInt(attr, 0);
622                break;
623
624            case com.android.internal.R.styleable.TextView_linksClickable:
625                mLinksClickable = a.getBoolean(attr, true);
626                break;
627
628            case com.android.internal.R.styleable.TextView_drawableLeft:
629                drawableLeft = a.getDrawable(attr);
630                break;
631
632            case com.android.internal.R.styleable.TextView_drawableTop:
633                drawableTop = a.getDrawable(attr);
634                break;
635
636            case com.android.internal.R.styleable.TextView_drawableRight:
637                drawableRight = a.getDrawable(attr);
638                break;
639
640            case com.android.internal.R.styleable.TextView_drawableBottom:
641                drawableBottom = a.getDrawable(attr);
642                break;
643
644            case com.android.internal.R.styleable.TextView_drawableStart:
645                drawableStart = a.getDrawable(attr);
646                break;
647
648            case com.android.internal.R.styleable.TextView_drawableEnd:
649                drawableEnd = a.getDrawable(attr);
650                break;
651
652            case com.android.internal.R.styleable.TextView_drawablePadding:
653                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
654                break;
655
656            case com.android.internal.R.styleable.TextView_maxLines:
657                setMaxLines(a.getInt(attr, -1));
658                break;
659
660            case com.android.internal.R.styleable.TextView_maxHeight:
661                setMaxHeight(a.getDimensionPixelSize(attr, -1));
662                break;
663
664            case com.android.internal.R.styleable.TextView_lines:
665                setLines(a.getInt(attr, -1));
666                break;
667
668            case com.android.internal.R.styleable.TextView_height:
669                setHeight(a.getDimensionPixelSize(attr, -1));
670                break;
671
672            case com.android.internal.R.styleable.TextView_minLines:
673                setMinLines(a.getInt(attr, -1));
674                break;
675
676            case com.android.internal.R.styleable.TextView_minHeight:
677                setMinHeight(a.getDimensionPixelSize(attr, -1));
678                break;
679
680            case com.android.internal.R.styleable.TextView_maxEms:
681                setMaxEms(a.getInt(attr, -1));
682                break;
683
684            case com.android.internal.R.styleable.TextView_maxWidth:
685                setMaxWidth(a.getDimensionPixelSize(attr, -1));
686                break;
687
688            case com.android.internal.R.styleable.TextView_ems:
689                setEms(a.getInt(attr, -1));
690                break;
691
692            case com.android.internal.R.styleable.TextView_width:
693                setWidth(a.getDimensionPixelSize(attr, -1));
694                break;
695
696            case com.android.internal.R.styleable.TextView_minEms:
697                setMinEms(a.getInt(attr, -1));
698                break;
699
700            case com.android.internal.R.styleable.TextView_minWidth:
701                setMinWidth(a.getDimensionPixelSize(attr, -1));
702                break;
703
704            case com.android.internal.R.styleable.TextView_gravity:
705                setGravity(a.getInt(attr, -1));
706                break;
707
708            case com.android.internal.R.styleable.TextView_hint:
709                hint = a.getText(attr);
710                break;
711
712            case com.android.internal.R.styleable.TextView_text:
713                text = a.getText(attr);
714                break;
715
716            case com.android.internal.R.styleable.TextView_scrollHorizontally:
717                if (a.getBoolean(attr, false)) {
718                    setHorizontallyScrolling(true);
719                }
720                break;
721
722            case com.android.internal.R.styleable.TextView_singleLine:
723                singleLine = a.getBoolean(attr, singleLine);
724                break;
725
726            case com.android.internal.R.styleable.TextView_ellipsize:
727                ellipsize = a.getInt(attr, ellipsize);
728                break;
729
730            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
731                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
732                break;
733
734            case com.android.internal.R.styleable.TextView_includeFontPadding:
735                if (!a.getBoolean(attr, true)) {
736                    setIncludeFontPadding(false);
737                }
738                break;
739
740            case com.android.internal.R.styleable.TextView_cursorVisible:
741                if (!a.getBoolean(attr, true)) {
742                    setCursorVisible(false);
743                }
744                break;
745
746            case com.android.internal.R.styleable.TextView_maxLength:
747                maxlength = a.getInt(attr, -1);
748                break;
749
750            case com.android.internal.R.styleable.TextView_textScaleX:
751                setTextScaleX(a.getFloat(attr, 1.0f));
752                break;
753
754            case com.android.internal.R.styleable.TextView_freezesText:
755                mFreezesText = a.getBoolean(attr, false);
756                break;
757
758            case com.android.internal.R.styleable.TextView_shadowColor:
759                shadowcolor = a.getInt(attr, 0);
760                break;
761
762            case com.android.internal.R.styleable.TextView_shadowDx:
763                dx = a.getFloat(attr, 0);
764                break;
765
766            case com.android.internal.R.styleable.TextView_shadowDy:
767                dy = a.getFloat(attr, 0);
768                break;
769
770            case com.android.internal.R.styleable.TextView_shadowRadius:
771                r = a.getFloat(attr, 0);
772                break;
773
774            case com.android.internal.R.styleable.TextView_enabled:
775                setEnabled(a.getBoolean(attr, isEnabled()));
776                break;
777
778            case com.android.internal.R.styleable.TextView_textColorHighlight:
779                textColorHighlight = a.getColor(attr, textColorHighlight);
780                break;
781
782            case com.android.internal.R.styleable.TextView_textColor:
783                textColor = a.getColorStateList(attr);
784                break;
785
786            case com.android.internal.R.styleable.TextView_textColorHint:
787                textColorHint = a.getColorStateList(attr);
788                break;
789
790            case com.android.internal.R.styleable.TextView_textColorLink:
791                textColorLink = a.getColorStateList(attr);
792                break;
793
794            case com.android.internal.R.styleable.TextView_textSize:
795                textSize = a.getDimensionPixelSize(attr, textSize);
796                break;
797
798            case com.android.internal.R.styleable.TextView_typeface:
799                typefaceIndex = a.getInt(attr, typefaceIndex);
800                break;
801
802            case com.android.internal.R.styleable.TextView_textStyle:
803                styleIndex = a.getInt(attr, styleIndex);
804                break;
805
806            case com.android.internal.R.styleable.TextView_password:
807                password = a.getBoolean(attr, password);
808                break;
809
810            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
811                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
812                break;
813
814            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
815                mSpacingMult = a.getFloat(attr, mSpacingMult);
816                break;
817
818            case com.android.internal.R.styleable.TextView_inputType:
819                inputType = a.getInt(attr, EditorInfo.TYPE_NULL);
820                break;
821
822            case com.android.internal.R.styleable.TextView_imeOptions:
823                createEditorIfNeeded("IME options specified in constructor");
824                if (getEditor().mInputContentType == null) {
825                    getEditor().mInputContentType = new InputContentType();
826                }
827                getEditor().mInputContentType.imeOptions = a.getInt(attr,
828                        getEditor().mInputContentType.imeOptions);
829                break;
830
831            case com.android.internal.R.styleable.TextView_imeActionLabel:
832                createEditorIfNeeded("IME action label specified in constructor");
833                if (getEditor().mInputContentType == null) {
834                    getEditor().mInputContentType = new InputContentType();
835                }
836                getEditor().mInputContentType.imeActionLabel = a.getText(attr);
837                break;
838
839            case com.android.internal.R.styleable.TextView_imeActionId:
840                createEditorIfNeeded("IME action id specified in constructor");
841                if (getEditor().mInputContentType == null) {
842                    getEditor().mInputContentType = new InputContentType();
843                }
844                getEditor().mInputContentType.imeActionId = a.getInt(attr,
845                        getEditor().mInputContentType.imeActionId);
846                break;
847
848            case com.android.internal.R.styleable.TextView_privateImeOptions:
849                setPrivateImeOptions(a.getString(attr));
850                break;
851
852            case com.android.internal.R.styleable.TextView_editorExtras:
853                try {
854                    setInputExtras(a.getResourceId(attr, 0));
855                } catch (XmlPullParserException e) {
856                    Log.w(LOG_TAG, "Failure reading input extras", e);
857                } catch (IOException e) {
858                    Log.w(LOG_TAG, "Failure reading input extras", e);
859                }
860                break;
861
862            case com.android.internal.R.styleable.TextView_textCursorDrawable:
863                mCursorDrawableRes = a.getResourceId(attr, 0);
864                break;
865
866            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
867                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
868                break;
869
870            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
871                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
872                break;
873
874            case com.android.internal.R.styleable.TextView_textSelectHandle:
875                mTextSelectHandleRes = a.getResourceId(attr, 0);
876                break;
877
878            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
879                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
880                break;
881
882            case com.android.internal.R.styleable.TextView_textIsSelectable:
883                setTextIsSelectable(a.getBoolean(attr, false));
884                break;
885
886            case com.android.internal.R.styleable.TextView_textAllCaps:
887                allCaps = a.getBoolean(attr, false);
888                break;
889            }
890        }
891        a.recycle();
892
893        BufferType bufferType = BufferType.EDITABLE;
894
895        final int variation =
896                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
897        final boolean passwordInputType = variation
898                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
899        final boolean webPasswordInputType = variation
900                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
901        final boolean numberPasswordInputType = variation
902                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
903
904        if (inputMethod != null) {
905            Class<?> c;
906
907            try {
908                c = Class.forName(inputMethod.toString());
909            } catch (ClassNotFoundException ex) {
910                throw new RuntimeException(ex);
911            }
912
913            try {
914                createEditorIfNeeded("inputMethod in ctor");
915                getEditor().mKeyListener = (KeyListener) c.newInstance();
916            } catch (InstantiationException ex) {
917                throw new RuntimeException(ex);
918            } catch (IllegalAccessException ex) {
919                throw new RuntimeException(ex);
920            }
921            try {
922                getEditor().mInputType = inputType != EditorInfo.TYPE_NULL
923                        ? inputType
924                        : getEditor().mKeyListener.getInputType();
925            } catch (IncompatibleClassChangeError e) {
926                getEditor().mInputType = EditorInfo.TYPE_CLASS_TEXT;
927            }
928        } else if (digits != null) {
929            createEditorIfNeeded("digits in ctor");
930            getEditor().mKeyListener = DigitsKeyListener.getInstance(digits.toString());
931            // If no input type was specified, we will default to generic
932            // text, since we can't tell the IME about the set of digits
933            // that was selected.
934            getEditor().mInputType = inputType != EditorInfo.TYPE_NULL
935                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
936        } else if (inputType != EditorInfo.TYPE_NULL) {
937            setInputType(inputType, true);
938            // If set, the input type overrides what was set using the deprecated singleLine flag.
939            singleLine = !isMultilineInputType(inputType);
940        } else if (phone) {
941            createEditorIfNeeded("dialer in ctor");
942            getEditor().mKeyListener = DialerKeyListener.getInstance();
943            getEditor().mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
944        } else if (numeric != 0) {
945            createEditorIfNeeded("numeric in ctor");
946            getEditor().mKeyListener = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
947                                                   (numeric & DECIMAL) != 0);
948            inputType = EditorInfo.TYPE_CLASS_NUMBER;
949            if ((numeric & SIGNED) != 0) {
950                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
951            }
952            if ((numeric & DECIMAL) != 0) {
953                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
954            }
955            getEditor().mInputType = inputType;
956        } else if (autotext || autocap != -1) {
957            TextKeyListener.Capitalize cap;
958
959            inputType = EditorInfo.TYPE_CLASS_TEXT;
960
961            switch (autocap) {
962            case 1:
963                cap = TextKeyListener.Capitalize.SENTENCES;
964                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
965                break;
966
967            case 2:
968                cap = TextKeyListener.Capitalize.WORDS;
969                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
970                break;
971
972            case 3:
973                cap = TextKeyListener.Capitalize.CHARACTERS;
974                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
975                break;
976
977            default:
978                cap = TextKeyListener.Capitalize.NONE;
979                break;
980            }
981
982            createEditorIfNeeded("text input in ctor");
983            getEditor().mKeyListener = TextKeyListener.getInstance(autotext, cap);
984            getEditor().mInputType = inputType;
985        } else if (isTextSelectable()) {
986            // Prevent text changes from keyboard.
987            if (mEditor != null) {
988                getEditor().mKeyListener = null;
989                getEditor().mInputType = EditorInfo.TYPE_NULL;
990            }
991            bufferType = BufferType.SPANNABLE;
992            // So that selection can be changed using arrow keys and touch is handled.
993            setMovementMethod(ArrowKeyMovementMethod.getInstance());
994        } else if (editable) {
995            createEditorIfNeeded("editable input in ctor");
996            getEditor().mKeyListener = TextKeyListener.getInstance();
997            getEditor().mInputType = EditorInfo.TYPE_CLASS_TEXT;
998        } else {
999            if (mEditor != null) getEditor().mKeyListener = null;
1000
1001            switch (buffertype) {
1002                case 0:
1003                    bufferType = BufferType.NORMAL;
1004                    break;
1005                case 1:
1006                    bufferType = BufferType.SPANNABLE;
1007                    break;
1008                case 2:
1009                    bufferType = BufferType.EDITABLE;
1010                    break;
1011            }
1012        }
1013
1014        if (mEditor != null) getEditor().adjustInputType(password, passwordInputType, webPasswordInputType,
1015                numberPasswordInputType);
1016
1017        if (selectallonfocus) {
1018            createEditorIfNeeded("selectallonfocus in constructor");
1019            getEditor().mSelectAllOnFocus = true;
1020
1021            if (bufferType == BufferType.NORMAL)
1022                bufferType = BufferType.SPANNABLE;
1023        }
1024
1025        setCompoundDrawablesWithIntrinsicBounds(
1026            drawableLeft, drawableTop, drawableRight, drawableBottom);
1027        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1028        setCompoundDrawablePadding(drawablePadding);
1029
1030        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1031        // of lines of height are unchanged for multi-line TextViews.
1032        setInputTypeSingleLine(singleLine);
1033        applySingleLine(singleLine, singleLine, singleLine);
1034
1035        if (singleLine && getKeyListener() == null && ellipsize < 0) {
1036                ellipsize = 3; // END
1037        }
1038
1039        switch (ellipsize) {
1040            case 1:
1041                setEllipsize(TextUtils.TruncateAt.START);
1042                break;
1043            case 2:
1044                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1045                break;
1046            case 3:
1047                setEllipsize(TextUtils.TruncateAt.END);
1048                break;
1049            case 4:
1050                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1051                    setHorizontalFadingEdgeEnabled(true);
1052                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1053                } else {
1054                    setHorizontalFadingEdgeEnabled(false);
1055                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1056                }
1057                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1058                break;
1059        }
1060
1061        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1062        setHintTextColor(textColorHint);
1063        setLinkTextColor(textColorLink);
1064        if (textColorHighlight != 0) {
1065            setHighlightColor(textColorHighlight);
1066        }
1067        setRawTextSize(textSize);
1068
1069        if (allCaps) {
1070            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1071        }
1072
1073        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1074            setTransformationMethod(PasswordTransformationMethod.getInstance());
1075            typefaceIndex = MONOSPACE;
1076        } else if (mEditor != null && (getEditor().mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1077                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1078            typefaceIndex = MONOSPACE;
1079        }
1080
1081        setTypefaceByIndex(typefaceIndex, styleIndex);
1082
1083        if (shadowcolor != 0) {
1084            setShadowLayer(r, dx, dy, shadowcolor);
1085        }
1086
1087        if (maxlength >= 0) {
1088            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1089        } else {
1090            setFilters(NO_FILTERS);
1091        }
1092
1093        setText(text, bufferType);
1094        if (hint != null) setHint(hint);
1095
1096        /*
1097         * Views are not normally focusable unless specified to be.
1098         * However, TextViews that have input or movement methods *are*
1099         * focusable by default.
1100         */
1101        a = context.obtainStyledAttributes(attrs,
1102                                           com.android.internal.R.styleable.View,
1103                                           defStyle, 0);
1104
1105        boolean focusable = mMovement != null || getKeyListener() != null;
1106        boolean clickable = focusable;
1107        boolean longClickable = focusable;
1108
1109        n = a.getIndexCount();
1110        for (int i = 0; i < n; i++) {
1111            int attr = a.getIndex(i);
1112
1113            switch (attr) {
1114            case com.android.internal.R.styleable.View_focusable:
1115                focusable = a.getBoolean(attr, focusable);
1116                break;
1117
1118            case com.android.internal.R.styleable.View_clickable:
1119                clickable = a.getBoolean(attr, clickable);
1120                break;
1121
1122            case com.android.internal.R.styleable.View_longClickable:
1123                longClickable = a.getBoolean(attr, longClickable);
1124                break;
1125            }
1126        }
1127        a.recycle();
1128
1129        setFocusable(focusable);
1130        setClickable(clickable);
1131        setLongClickable(longClickable);
1132
1133        prepareCursorControllers();
1134    }
1135
1136    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1137        Typeface tf = null;
1138        switch (typefaceIndex) {
1139            case SANS:
1140                tf = Typeface.SANS_SERIF;
1141                break;
1142
1143            case SERIF:
1144                tf = Typeface.SERIF;
1145                break;
1146
1147            case MONOSPACE:
1148                tf = Typeface.MONOSPACE;
1149                break;
1150        }
1151
1152        setTypeface(tf, styleIndex);
1153    }
1154
1155    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1156        boolean hasRelativeDrawables = (start != null) || (end != null);
1157        if (hasRelativeDrawables) {
1158            Drawables dr = mDrawables;
1159            if (dr == null) {
1160                mDrawables = dr = new Drawables();
1161            }
1162            final Rect compoundRect = dr.mCompoundRect;
1163            int[] state = getDrawableState();
1164            if (start != null) {
1165                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1166                start.setState(state);
1167                start.copyBounds(compoundRect);
1168                start.setCallback(this);
1169
1170                dr.mDrawableStart = start;
1171                dr.mDrawableSizeStart = compoundRect.width();
1172                dr.mDrawableHeightStart = compoundRect.height();
1173            } else {
1174                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1175            }
1176            if (end != null) {
1177                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1178                end.setState(state);
1179                end.copyBounds(compoundRect);
1180                end.setCallback(this);
1181
1182                dr.mDrawableEnd = end;
1183                dr.mDrawableSizeEnd = compoundRect.width();
1184                dr.mDrawableHeightEnd = compoundRect.height();
1185            } else {
1186                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1187            }
1188        }
1189    }
1190
1191    @Override
1192    public void setEnabled(boolean enabled) {
1193        if (enabled == isEnabled()) {
1194            return;
1195        }
1196
1197        if (!enabled) {
1198            // Hide the soft input if the currently active TextView is disabled
1199            InputMethodManager imm = InputMethodManager.peekInstance();
1200            if (imm != null && imm.isActive(this)) {
1201                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1202            }
1203        }
1204
1205        super.setEnabled(enabled);
1206
1207        if (enabled) {
1208            // Make sure IME is updated with current editor info.
1209            InputMethodManager imm = InputMethodManager.peekInstance();
1210            if (imm != null) imm.restartInput(this);
1211        }
1212
1213        if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
1214        prepareCursorControllers();
1215
1216        // start or stop the cursor blinking as appropriate
1217        makeBlink();
1218    }
1219
1220    /**
1221     * Sets the typeface and style in which the text should be displayed,
1222     * and turns on the fake bold and italic bits in the Paint if the
1223     * Typeface that you provided does not have all the bits in the
1224     * style that you specified.
1225     *
1226     * @attr ref android.R.styleable#TextView_typeface
1227     * @attr ref android.R.styleable#TextView_textStyle
1228     */
1229    public void setTypeface(Typeface tf, int style) {
1230        if (style > 0) {
1231            if (tf == null) {
1232                tf = Typeface.defaultFromStyle(style);
1233            } else {
1234                tf = Typeface.create(tf, style);
1235            }
1236
1237            setTypeface(tf);
1238            // now compute what (if any) algorithmic styling is needed
1239            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1240            int need = style & ~typefaceStyle;
1241            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1242            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1243        } else {
1244            mTextPaint.setFakeBoldText(false);
1245            mTextPaint.setTextSkewX(0);
1246            setTypeface(tf);
1247        }
1248    }
1249
1250    /**
1251     * Subclasses override this to specify that they have a KeyListener
1252     * by default even if not specifically called for in the XML options.
1253     */
1254    protected boolean getDefaultEditable() {
1255        return false;
1256    }
1257
1258    /**
1259     * Subclasses override this to specify a default movement method.
1260     */
1261    protected MovementMethod getDefaultMovementMethod() {
1262        return null;
1263    }
1264
1265    /**
1266     * Return the text the TextView is displaying. If setText() was called with
1267     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1268     * the return value from this method to Spannable or Editable, respectively.
1269     *
1270     * Note: The content of the return value should not be modified. If you want
1271     * a modifiable one, you should make your own copy first.
1272     */
1273    @ViewDebug.CapturedViewProperty
1274    public CharSequence getText() {
1275        return mText;
1276    }
1277
1278    /**
1279     * Returns the length, in characters, of the text managed by this TextView
1280     */
1281    public int length() {
1282        return mText.length();
1283    }
1284
1285    /**
1286     * Return the text the TextView is displaying as an Editable object.  If
1287     * the text is not editable, null is returned.
1288     *
1289     * @see #getText
1290     */
1291    public Editable getEditableText() {
1292        return (mText instanceof Editable) ? (Editable)mText : null;
1293    }
1294
1295    /**
1296     * @return the height of one standard line in pixels.  Note that markup
1297     * within the text can cause individual lines to be taller or shorter
1298     * than this height, and the layout may contain additional first-
1299     * or last-line padding.
1300     */
1301    public int getLineHeight() {
1302        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1303    }
1304
1305    /**
1306     * @return the Layout that is currently being used to display the text.
1307     * This can be null if the text or width has recently changes.
1308     */
1309    public final Layout getLayout() {
1310        return mLayout;
1311    }
1312
1313    /**
1314     * @return the current key listener for this TextView.
1315     * This will frequently be null for non-EditText TextViews.
1316     */
1317    public final KeyListener getKeyListener() {
1318        return mEditor == null ? null : getEditor().mKeyListener;
1319    }
1320
1321    /**
1322     * Sets the key listener to be used with this TextView.  This can be null
1323     * to disallow user input.  Note that this method has significant and
1324     * subtle interactions with soft keyboards and other input method:
1325     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1326     * for important details.  Calling this method will replace the current
1327     * content type of the text view with the content type returned by the
1328     * key listener.
1329     * <p>
1330     * Be warned that if you want a TextView with a key listener or movement
1331     * method not to be focusable, or if you want a TextView without a
1332     * key listener or movement method to be focusable, you must call
1333     * {@link #setFocusable} again after calling this to get the focusability
1334     * back the way you want it.
1335     *
1336     * @attr ref android.R.styleable#TextView_numeric
1337     * @attr ref android.R.styleable#TextView_digits
1338     * @attr ref android.R.styleable#TextView_phoneNumber
1339     * @attr ref android.R.styleable#TextView_inputMethod
1340     * @attr ref android.R.styleable#TextView_capitalize
1341     * @attr ref android.R.styleable#TextView_autoText
1342     */
1343    public void setKeyListener(KeyListener input) {
1344        setKeyListenerOnly(input);
1345        fixFocusableAndClickableSettings();
1346
1347        if (input != null) {
1348            createEditorIfNeeded("input is not null");
1349            try {
1350                getEditor().mInputType = getEditor().mKeyListener.getInputType();
1351            } catch (IncompatibleClassChangeError e) {
1352                getEditor().mInputType = EditorInfo.TYPE_CLASS_TEXT;
1353            }
1354            // Change inputType, without affecting transformation.
1355            // No need to applySingleLine since mSingleLine is unchanged.
1356            setInputTypeSingleLine(mSingleLine);
1357        } else {
1358            if (mEditor != null) getEditor().mInputType = EditorInfo.TYPE_NULL;
1359        }
1360
1361        InputMethodManager imm = InputMethodManager.peekInstance();
1362        if (imm != null) imm.restartInput(this);
1363    }
1364
1365    private void setKeyListenerOnly(KeyListener input) {
1366        if (mEditor == null && input == null) return; // null is the default value
1367
1368        createEditorIfNeeded("setKeyListenerOnly");
1369        if (getEditor().mKeyListener != input) {
1370            getEditor().mKeyListener = input;
1371            if (input != null && !(mText instanceof Editable)) {
1372                setText(mText);
1373            }
1374
1375            setFilters((Editable) mText, mFilters);
1376        }
1377    }
1378
1379    /**
1380     * @return the movement method being used for this TextView.
1381     * This will frequently be null for non-EditText TextViews.
1382     */
1383    public final MovementMethod getMovementMethod() {
1384        return mMovement;
1385    }
1386
1387    /**
1388     * Sets the movement method (arrow key handler) to be used for
1389     * this TextView.  This can be null to disallow using the arrow keys
1390     * to move the cursor or scroll the view.
1391     * <p>
1392     * Be warned that if you want a TextView with a key listener or movement
1393     * method not to be focusable, or if you want a TextView without a
1394     * key listener or movement method to be focusable, you must call
1395     * {@link #setFocusable} again after calling this to get the focusability
1396     * back the way you want it.
1397     */
1398    public final void setMovementMethod(MovementMethod movement) {
1399        if (mMovement != movement) {
1400            mMovement = movement;
1401
1402            if (movement != null && !(mText instanceof Spannable)) {
1403                setText(mText);
1404            }
1405
1406            fixFocusableAndClickableSettings();
1407
1408            // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1409            prepareCursorControllers();
1410        }
1411    }
1412
1413    private void fixFocusableAndClickableSettings() {
1414        if (mMovement != null || (mEditor != null && getEditor().mKeyListener != null)) {
1415            setFocusable(true);
1416            setClickable(true);
1417            setLongClickable(true);
1418        } else {
1419            setFocusable(false);
1420            setClickable(false);
1421            setLongClickable(false);
1422        }
1423    }
1424
1425    /**
1426     * @return the current transformation method for this TextView.
1427     * This will frequently be null except for single-line and password
1428     * fields.
1429     */
1430    public final TransformationMethod getTransformationMethod() {
1431        return mTransformation;
1432    }
1433
1434    /**
1435     * Sets the transformation that is applied to the text that this
1436     * TextView is displaying.
1437     *
1438     * @attr ref android.R.styleable#TextView_password
1439     * @attr ref android.R.styleable#TextView_singleLine
1440     */
1441    public final void setTransformationMethod(TransformationMethod method) {
1442        if (method == mTransformation) {
1443            // Avoid the setText() below if the transformation is
1444            // the same.
1445            return;
1446        }
1447        if (mTransformation != null) {
1448            if (mText instanceof Spannable) {
1449                ((Spannable) mText).removeSpan(mTransformation);
1450            }
1451        }
1452
1453        mTransformation = method;
1454
1455        if (method instanceof TransformationMethod2) {
1456            TransformationMethod2 method2 = (TransformationMethod2) method;
1457            mAllowTransformationLengthChange = !isTextSelectable() && !(mText instanceof Editable);
1458            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1459        } else {
1460            mAllowTransformationLengthChange = false;
1461        }
1462
1463        setText(mText);
1464    }
1465
1466    /**
1467     * Returns the top padding of the view, plus space for the top
1468     * Drawable if any.
1469     */
1470    public int getCompoundPaddingTop() {
1471        final Drawables dr = mDrawables;
1472        if (dr == null || dr.mDrawableTop == null) {
1473            return mPaddingTop;
1474        } else {
1475            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1476        }
1477    }
1478
1479    /**
1480     * Returns the bottom padding of the view, plus space for the bottom
1481     * Drawable if any.
1482     */
1483    public int getCompoundPaddingBottom() {
1484        final Drawables dr = mDrawables;
1485        if (dr == null || dr.mDrawableBottom == null) {
1486            return mPaddingBottom;
1487        } else {
1488            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1489        }
1490    }
1491
1492    /**
1493     * Returns the left padding of the view, plus space for the left
1494     * Drawable if any.
1495     */
1496    public int getCompoundPaddingLeft() {
1497        final Drawables dr = mDrawables;
1498        if (dr == null || dr.mDrawableLeft == null) {
1499            return mPaddingLeft;
1500        } else {
1501            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1502        }
1503    }
1504
1505    /**
1506     * Returns the right padding of the view, plus space for the right
1507     * Drawable if any.
1508     */
1509    public int getCompoundPaddingRight() {
1510        final Drawables dr = mDrawables;
1511        if (dr == null || dr.mDrawableRight == null) {
1512            return mPaddingRight;
1513        } else {
1514            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1515        }
1516    }
1517
1518    /**
1519     * Returns the start padding of the view, plus space for the start
1520     * Drawable if any.
1521     *
1522     * @hide
1523     */
1524    public int getCompoundPaddingStart() {
1525        resolveDrawables();
1526        switch(getResolvedLayoutDirection()) {
1527            default:
1528            case LAYOUT_DIRECTION_LTR:
1529                return getCompoundPaddingLeft();
1530            case LAYOUT_DIRECTION_RTL:
1531                return getCompoundPaddingRight();
1532        }
1533    }
1534
1535    /**
1536     * Returns the end padding of the view, plus space for the end
1537     * Drawable if any.
1538     *
1539     * @hide
1540     */
1541    public int getCompoundPaddingEnd() {
1542        resolveDrawables();
1543        switch(getResolvedLayoutDirection()) {
1544            default:
1545            case LAYOUT_DIRECTION_LTR:
1546                return getCompoundPaddingRight();
1547            case LAYOUT_DIRECTION_RTL:
1548                return getCompoundPaddingLeft();
1549        }
1550    }
1551
1552    /**
1553     * Returns the extended top padding of the view, including both the
1554     * top Drawable if any and any extra space to keep more than maxLines
1555     * of text from showing.  It is only valid to call this after measuring.
1556     */
1557    public int getExtendedPaddingTop() {
1558        if (mMaxMode != LINES) {
1559            return getCompoundPaddingTop();
1560        }
1561
1562        if (mLayout.getLineCount() <= mMaximum) {
1563            return getCompoundPaddingTop();
1564        }
1565
1566        int top = getCompoundPaddingTop();
1567        int bottom = getCompoundPaddingBottom();
1568        int viewht = getHeight() - top - bottom;
1569        int layoutht = mLayout.getLineTop(mMaximum);
1570
1571        if (layoutht >= viewht) {
1572            return top;
1573        }
1574
1575        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1576        if (gravity == Gravity.TOP) {
1577            return top;
1578        } else if (gravity == Gravity.BOTTOM) {
1579            return top + viewht - layoutht;
1580        } else { // (gravity == Gravity.CENTER_VERTICAL)
1581            return top + (viewht - layoutht) / 2;
1582        }
1583    }
1584
1585    /**
1586     * Returns the extended bottom padding of the view, including both the
1587     * bottom Drawable if any and any extra space to keep more than maxLines
1588     * of text from showing.  It is only valid to call this after measuring.
1589     */
1590    public int getExtendedPaddingBottom() {
1591        if (mMaxMode != LINES) {
1592            return getCompoundPaddingBottom();
1593        }
1594
1595        if (mLayout.getLineCount() <= mMaximum) {
1596            return getCompoundPaddingBottom();
1597        }
1598
1599        int top = getCompoundPaddingTop();
1600        int bottom = getCompoundPaddingBottom();
1601        int viewht = getHeight() - top - bottom;
1602        int layoutht = mLayout.getLineTop(mMaximum);
1603
1604        if (layoutht >= viewht) {
1605            return bottom;
1606        }
1607
1608        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1609        if (gravity == Gravity.TOP) {
1610            return bottom + viewht - layoutht;
1611        } else if (gravity == Gravity.BOTTOM) {
1612            return bottom;
1613        } else { // (gravity == Gravity.CENTER_VERTICAL)
1614            return bottom + (viewht - layoutht) / 2;
1615        }
1616    }
1617
1618    /**
1619     * Returns the total left padding of the view, including the left
1620     * Drawable if any.
1621     */
1622    public int getTotalPaddingLeft() {
1623        return getCompoundPaddingLeft();
1624    }
1625
1626    /**
1627     * Returns the total right padding of the view, including the right
1628     * Drawable if any.
1629     */
1630    public int getTotalPaddingRight() {
1631        return getCompoundPaddingRight();
1632    }
1633
1634    /**
1635     * Returns the total start padding of the view, including the start
1636     * Drawable if any.
1637     *
1638     * @hide
1639     */
1640    public int getTotalPaddingStart() {
1641        return getCompoundPaddingStart();
1642    }
1643
1644    /**
1645     * Returns the total end padding of the view, including the end
1646     * Drawable if any.
1647     *
1648     * @hide
1649     */
1650    public int getTotalPaddingEnd() {
1651        return getCompoundPaddingEnd();
1652    }
1653
1654    /**
1655     * Returns the total top padding of the view, including the top
1656     * Drawable if any, the extra space to keep more than maxLines
1657     * from showing, and the vertical offset for gravity, if any.
1658     */
1659    public int getTotalPaddingTop() {
1660        return getExtendedPaddingTop() + getVerticalOffset(true);
1661    }
1662
1663    /**
1664     * Returns the total bottom padding of the view, including the bottom
1665     * Drawable if any, the extra space to keep more than maxLines
1666     * from showing, and the vertical offset for gravity, if any.
1667     */
1668    public int getTotalPaddingBottom() {
1669        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1670    }
1671
1672    /**
1673     * Sets the Drawables (if any) to appear to the left of, above,
1674     * to the right of, and below the text.  Use null if you do not
1675     * want a Drawable there.  The Drawables must already have had
1676     * {@link Drawable#setBounds} called.
1677     *
1678     * @attr ref android.R.styleable#TextView_drawableLeft
1679     * @attr ref android.R.styleable#TextView_drawableTop
1680     * @attr ref android.R.styleable#TextView_drawableRight
1681     * @attr ref android.R.styleable#TextView_drawableBottom
1682     */
1683    public void setCompoundDrawables(Drawable left, Drawable top,
1684                                     Drawable right, Drawable bottom) {
1685        Drawables dr = mDrawables;
1686
1687        final boolean drawables = left != null || top != null
1688                || right != null || bottom != null;
1689
1690        if (!drawables) {
1691            // Clearing drawables...  can we free the data structure?
1692            if (dr != null) {
1693                if (dr.mDrawablePadding == 0) {
1694                    mDrawables = null;
1695                } else {
1696                    // We need to retain the last set padding, so just clear
1697                    // out all of the fields in the existing structure.
1698                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1699                    dr.mDrawableLeft = null;
1700                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1701                    dr.mDrawableTop = null;
1702                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1703                    dr.mDrawableRight = null;
1704                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1705                    dr.mDrawableBottom = null;
1706                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1707                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1708                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1709                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1710                }
1711            }
1712        } else {
1713            if (dr == null) {
1714                mDrawables = dr = new Drawables();
1715            }
1716
1717            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1718                dr.mDrawableLeft.setCallback(null);
1719            }
1720            dr.mDrawableLeft = left;
1721
1722            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1723                dr.mDrawableTop.setCallback(null);
1724            }
1725            dr.mDrawableTop = top;
1726
1727            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1728                dr.mDrawableRight.setCallback(null);
1729            }
1730            dr.mDrawableRight = right;
1731
1732            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1733                dr.mDrawableBottom.setCallback(null);
1734            }
1735            dr.mDrawableBottom = bottom;
1736
1737            final Rect compoundRect = dr.mCompoundRect;
1738            int[] state;
1739
1740            state = getDrawableState();
1741
1742            if (left != null) {
1743                left.setState(state);
1744                left.copyBounds(compoundRect);
1745                left.setCallback(this);
1746                dr.mDrawableSizeLeft = compoundRect.width();
1747                dr.mDrawableHeightLeft = compoundRect.height();
1748            } else {
1749                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1750            }
1751
1752            if (right != null) {
1753                right.setState(state);
1754                right.copyBounds(compoundRect);
1755                right.setCallback(this);
1756                dr.mDrawableSizeRight = compoundRect.width();
1757                dr.mDrawableHeightRight = compoundRect.height();
1758            } else {
1759                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1760            }
1761
1762            if (top != null) {
1763                top.setState(state);
1764                top.copyBounds(compoundRect);
1765                top.setCallback(this);
1766                dr.mDrawableSizeTop = compoundRect.height();
1767                dr.mDrawableWidthTop = compoundRect.width();
1768            } else {
1769                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1770            }
1771
1772            if (bottom != null) {
1773                bottom.setState(state);
1774                bottom.copyBounds(compoundRect);
1775                bottom.setCallback(this);
1776                dr.mDrawableSizeBottom = compoundRect.height();
1777                dr.mDrawableWidthBottom = compoundRect.width();
1778            } else {
1779                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1780            }
1781        }
1782
1783        invalidate();
1784        requestLayout();
1785    }
1786
1787    /**
1788     * Sets the Drawables (if any) to appear to the left of, above,
1789     * to the right of, and below the text.  Use 0 if you do not
1790     * want a Drawable there. The Drawables' bounds will be set to
1791     * their intrinsic bounds.
1792     *
1793     * @param left Resource identifier of the left Drawable.
1794     * @param top Resource identifier of the top Drawable.
1795     * @param right Resource identifier of the right Drawable.
1796     * @param bottom Resource identifier of the bottom Drawable.
1797     *
1798     * @attr ref android.R.styleable#TextView_drawableLeft
1799     * @attr ref android.R.styleable#TextView_drawableTop
1800     * @attr ref android.R.styleable#TextView_drawableRight
1801     * @attr ref android.R.styleable#TextView_drawableBottom
1802     */
1803    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1804        final Resources resources = getContext().getResources();
1805        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1806                top != 0 ? resources.getDrawable(top) : null,
1807                right != 0 ? resources.getDrawable(right) : null,
1808                bottom != 0 ? resources.getDrawable(bottom) : null);
1809    }
1810
1811    /**
1812     * Sets the Drawables (if any) to appear to the left of, above,
1813     * to the right of, and below the text.  Use null if you do not
1814     * want a Drawable there. The Drawables' bounds will be set to
1815     * their intrinsic bounds.
1816     *
1817     * @attr ref android.R.styleable#TextView_drawableLeft
1818     * @attr ref android.R.styleable#TextView_drawableTop
1819     * @attr ref android.R.styleable#TextView_drawableRight
1820     * @attr ref android.R.styleable#TextView_drawableBottom
1821     */
1822    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1823            Drawable right, Drawable bottom) {
1824
1825        if (left != null) {
1826            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1827        }
1828        if (right != null) {
1829            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1830        }
1831        if (top != null) {
1832            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1833        }
1834        if (bottom != null) {
1835            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1836        }
1837        setCompoundDrawables(left, top, right, bottom);
1838    }
1839
1840    /**
1841     * Sets the Drawables (if any) to appear to the start of, above,
1842     * to the end of, and below the text.  Use null if you do not
1843     * want a Drawable there.  The Drawables must already have had
1844     * {@link Drawable#setBounds} called.
1845     *
1846     * @attr ref android.R.styleable#TextView_drawableStart
1847     * @attr ref android.R.styleable#TextView_drawableTop
1848     * @attr ref android.R.styleable#TextView_drawableEnd
1849     * @attr ref android.R.styleable#TextView_drawableBottom
1850     *
1851     * @hide
1852     */
1853    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1854                                     Drawable end, Drawable bottom) {
1855        Drawables dr = mDrawables;
1856
1857        final boolean drawables = start != null || top != null
1858                || end != null || bottom != null;
1859
1860        if (!drawables) {
1861            // Clearing drawables...  can we free the data structure?
1862            if (dr != null) {
1863                if (dr.mDrawablePadding == 0) {
1864                    mDrawables = null;
1865                } else {
1866                    // We need to retain the last set padding, so just clear
1867                    // out all of the fields in the existing structure.
1868                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1869                    dr.mDrawableStart = null;
1870                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1871                    dr.mDrawableTop = null;
1872                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1873                    dr.mDrawableEnd = null;
1874                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1875                    dr.mDrawableBottom = null;
1876                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1877                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1878                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1879                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1880                }
1881            }
1882        } else {
1883            if (dr == null) {
1884                mDrawables = dr = new Drawables();
1885            }
1886
1887            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1888                dr.mDrawableStart.setCallback(null);
1889            }
1890            dr.mDrawableStart = start;
1891
1892            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1893                dr.mDrawableTop.setCallback(null);
1894            }
1895            dr.mDrawableTop = top;
1896
1897            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1898                dr.mDrawableEnd.setCallback(null);
1899            }
1900            dr.mDrawableEnd = end;
1901
1902            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1903                dr.mDrawableBottom.setCallback(null);
1904            }
1905            dr.mDrawableBottom = bottom;
1906
1907            final Rect compoundRect = dr.mCompoundRect;
1908            int[] state;
1909
1910            state = getDrawableState();
1911
1912            if (start != null) {
1913                start.setState(state);
1914                start.copyBounds(compoundRect);
1915                start.setCallback(this);
1916                dr.mDrawableSizeStart = compoundRect.width();
1917                dr.mDrawableHeightStart = compoundRect.height();
1918            } else {
1919                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1920            }
1921
1922            if (end != null) {
1923                end.setState(state);
1924                end.copyBounds(compoundRect);
1925                end.setCallback(this);
1926                dr.mDrawableSizeEnd = compoundRect.width();
1927                dr.mDrawableHeightEnd = compoundRect.height();
1928            } else {
1929                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1930            }
1931
1932            if (top != null) {
1933                top.setState(state);
1934                top.copyBounds(compoundRect);
1935                top.setCallback(this);
1936                dr.mDrawableSizeTop = compoundRect.height();
1937                dr.mDrawableWidthTop = compoundRect.width();
1938            } else {
1939                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1940            }
1941
1942            if (bottom != null) {
1943                bottom.setState(state);
1944                bottom.copyBounds(compoundRect);
1945                bottom.setCallback(this);
1946                dr.mDrawableSizeBottom = compoundRect.height();
1947                dr.mDrawableWidthBottom = compoundRect.width();
1948            } else {
1949                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1950            }
1951        }
1952
1953        resolveDrawables();
1954        invalidate();
1955        requestLayout();
1956    }
1957
1958    /**
1959     * Sets the Drawables (if any) to appear to the start of, above,
1960     * to the end of, and below the text.  Use 0 if you do not
1961     * want a Drawable there. The Drawables' bounds will be set to
1962     * their intrinsic bounds.
1963     *
1964     * @param start Resource identifier of the start Drawable.
1965     * @param top Resource identifier of the top Drawable.
1966     * @param end Resource identifier of the end Drawable.
1967     * @param bottom Resource identifier of the bottom Drawable.
1968     *
1969     * @attr ref android.R.styleable#TextView_drawableStart
1970     * @attr ref android.R.styleable#TextView_drawableTop
1971     * @attr ref android.R.styleable#TextView_drawableEnd
1972     * @attr ref android.R.styleable#TextView_drawableBottom
1973     *
1974     * @hide
1975     */
1976    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1977            int bottom) {
1978        resetResolvedDrawables();
1979        final Resources resources = getContext().getResources();
1980        setCompoundDrawablesRelativeWithIntrinsicBounds(
1981                start != 0 ? resources.getDrawable(start) : null,
1982                top != 0 ? resources.getDrawable(top) : null,
1983                end != 0 ? resources.getDrawable(end) : null,
1984                bottom != 0 ? resources.getDrawable(bottom) : null);
1985    }
1986
1987    /**
1988     * Sets the Drawables (if any) to appear to the start of, above,
1989     * to the end of, and below the text.  Use null if you do not
1990     * want a Drawable there. The Drawables' bounds will be set to
1991     * their intrinsic bounds.
1992     *
1993     * @attr ref android.R.styleable#TextView_drawableStart
1994     * @attr ref android.R.styleable#TextView_drawableTop
1995     * @attr ref android.R.styleable#TextView_drawableEnd
1996     * @attr ref android.R.styleable#TextView_drawableBottom
1997     *
1998     * @hide
1999     */
2000    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
2001            Drawable end, Drawable bottom) {
2002
2003        resetResolvedDrawables();
2004        if (start != null) {
2005            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
2006        }
2007        if (end != null) {
2008            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
2009        }
2010        if (top != null) {
2011            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
2012        }
2013        if (bottom != null) {
2014            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2015        }
2016        setCompoundDrawablesRelative(start, top, end, bottom);
2017    }
2018
2019    /**
2020     * Returns drawables for the left, top, right, and bottom borders.
2021     */
2022    public Drawable[] getCompoundDrawables() {
2023        final Drawables dr = mDrawables;
2024        if (dr != null) {
2025            return new Drawable[] {
2026                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2027            };
2028        } else {
2029            return new Drawable[] { null, null, null, null };
2030        }
2031    }
2032
2033    /**
2034     * Returns drawables for the start, top, end, and bottom borders.
2035     *
2036     * @hide
2037     */
2038    public Drawable[] getCompoundDrawablesRelative() {
2039        final Drawables dr = mDrawables;
2040        if (dr != null) {
2041            return new Drawable[] {
2042                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2043            };
2044        } else {
2045            return new Drawable[] { null, null, null, null };
2046        }
2047    }
2048
2049    /**
2050     * Sets the size of the padding between the compound drawables and
2051     * the text.
2052     *
2053     * @attr ref android.R.styleable#TextView_drawablePadding
2054     */
2055    public void setCompoundDrawablePadding(int pad) {
2056        Drawables dr = mDrawables;
2057        if (pad == 0) {
2058            if (dr != null) {
2059                dr.mDrawablePadding = pad;
2060            }
2061        } else {
2062            if (dr == null) {
2063                mDrawables = dr = new Drawables();
2064            }
2065            dr.mDrawablePadding = pad;
2066        }
2067
2068        invalidate();
2069        requestLayout();
2070    }
2071
2072    /**
2073     * Returns the padding between the compound drawables and the text.
2074     */
2075    public int getCompoundDrawablePadding() {
2076        final Drawables dr = mDrawables;
2077        return dr != null ? dr.mDrawablePadding : 0;
2078    }
2079
2080    @Override
2081    public void setPadding(int left, int top, int right, int bottom) {
2082        if (left != mPaddingLeft ||
2083            right != mPaddingRight ||
2084            top != mPaddingTop ||
2085            bottom != mPaddingBottom) {
2086            nullLayouts();
2087        }
2088
2089        // the super call will requestLayout()
2090        super.setPadding(left, top, right, bottom);
2091        invalidate();
2092    }
2093
2094    /**
2095     * Gets the autolink mask of the text.  See {@link
2096     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2097     * possible values.
2098     *
2099     * @attr ref android.R.styleable#TextView_autoLink
2100     */
2101    public final int getAutoLinkMask() {
2102        return mAutoLinkMask;
2103    }
2104
2105    /**
2106     * Sets the text color, size, style, hint color, and highlight color
2107     * from the specified TextAppearance resource.
2108     */
2109    public void setTextAppearance(Context context, int resid) {
2110        TypedArray appearance =
2111            context.obtainStyledAttributes(resid,
2112                                           com.android.internal.R.styleable.TextAppearance);
2113
2114        int color;
2115        ColorStateList colors;
2116        int ts;
2117
2118        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2119        if (color != 0) {
2120            setHighlightColor(color);
2121        }
2122
2123        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2124                                              TextAppearance_textColor);
2125        if (colors != null) {
2126            setTextColor(colors);
2127        }
2128
2129        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2130                                              TextAppearance_textSize, 0);
2131        if (ts != 0) {
2132            setRawTextSize(ts);
2133        }
2134
2135        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2136                                              TextAppearance_textColorHint);
2137        if (colors != null) {
2138            setHintTextColor(colors);
2139        }
2140
2141        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2142                                              TextAppearance_textColorLink);
2143        if (colors != null) {
2144            setLinkTextColor(colors);
2145        }
2146
2147        int typefaceIndex, styleIndex;
2148
2149        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2150                                          TextAppearance_typeface, -1);
2151        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2152                                       TextAppearance_textStyle, -1);
2153
2154        setTypefaceByIndex(typefaceIndex, styleIndex);
2155
2156        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2157                false)) {
2158            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2159        }
2160
2161        appearance.recycle();
2162    }
2163
2164    /**
2165     * @return the size (in pixels) of the default text size in this TextView.
2166     */
2167    public float getTextSize() {
2168        return mTextPaint.getTextSize();
2169    }
2170
2171    /**
2172     * Set the default text size to the given value, interpreted as "scaled
2173     * pixel" units.  This size is adjusted based on the current density and
2174     * user font size preference.
2175     *
2176     * @param size The scaled pixel size.
2177     *
2178     * @attr ref android.R.styleable#TextView_textSize
2179     */
2180    @android.view.RemotableViewMethod
2181    public void setTextSize(float size) {
2182        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2183    }
2184
2185    /**
2186     * Set the default text size to a given unit and value.  See {@link
2187     * TypedValue} for the possible dimension units.
2188     *
2189     * @param unit The desired dimension unit.
2190     * @param size The desired size in the given units.
2191     *
2192     * @attr ref android.R.styleable#TextView_textSize
2193     */
2194    public void setTextSize(int unit, float size) {
2195        Context c = getContext();
2196        Resources r;
2197
2198        if (c == null)
2199            r = Resources.getSystem();
2200        else
2201            r = c.getResources();
2202
2203        setRawTextSize(TypedValue.applyDimension(
2204            unit, size, r.getDisplayMetrics()));
2205    }
2206
2207    private void setRawTextSize(float size) {
2208        if (size != mTextPaint.getTextSize()) {
2209            mTextPaint.setTextSize(size);
2210
2211            if (mLayout != null) {
2212                nullLayouts();
2213                requestLayout();
2214                invalidate();
2215            }
2216        }
2217    }
2218
2219    /**
2220     * @return the extent by which text is currently being stretched
2221     * horizontally.  This will usually be 1.
2222     */
2223    public float getTextScaleX() {
2224        return mTextPaint.getTextScaleX();
2225    }
2226
2227    /**
2228     * Sets the extent by which text should be stretched horizontally.
2229     *
2230     * @attr ref android.R.styleable#TextView_textScaleX
2231     */
2232    @android.view.RemotableViewMethod
2233    public void setTextScaleX(float size) {
2234        if (size != mTextPaint.getTextScaleX()) {
2235            mUserSetTextScaleX = true;
2236            mTextPaint.setTextScaleX(size);
2237
2238            if (mLayout != null) {
2239                nullLayouts();
2240                requestLayout();
2241                invalidate();
2242            }
2243        }
2244    }
2245
2246    /**
2247     * Sets the typeface and style in which the text should be displayed.
2248     * Note that not all Typeface families actually have bold and italic
2249     * variants, so you may need to use
2250     * {@link #setTypeface(Typeface, int)} to get the appearance
2251     * that you actually want.
2252     *
2253     * @attr ref android.R.styleable#TextView_typeface
2254     * @attr ref android.R.styleable#TextView_textStyle
2255     */
2256    public void setTypeface(Typeface tf) {
2257        if (mTextPaint.getTypeface() != tf) {
2258            mTextPaint.setTypeface(tf);
2259
2260            if (mLayout != null) {
2261                nullLayouts();
2262                requestLayout();
2263                invalidate();
2264            }
2265        }
2266    }
2267
2268    /**
2269     * @return the current typeface and style in which the text is being
2270     * displayed.
2271     */
2272    public Typeface getTypeface() {
2273        return mTextPaint.getTypeface();
2274    }
2275
2276    /**
2277     * Sets the text color for all the states (normal, selected,
2278     * focused) to be this color.
2279     *
2280     * @attr ref android.R.styleable#TextView_textColor
2281     */
2282    @android.view.RemotableViewMethod
2283    public void setTextColor(int color) {
2284        mTextColor = ColorStateList.valueOf(color);
2285        updateTextColors();
2286    }
2287
2288    /**
2289     * Sets the text color.
2290     *
2291     * @attr ref android.R.styleable#TextView_textColor
2292     */
2293    public void setTextColor(ColorStateList colors) {
2294        if (colors == null) {
2295            throw new NullPointerException();
2296        }
2297
2298        mTextColor = colors;
2299        updateTextColors();
2300    }
2301
2302    /**
2303     * Return the set of text colors.
2304     *
2305     * @return Returns the set of text colors.
2306     */
2307    public final ColorStateList getTextColors() {
2308        return mTextColor;
2309    }
2310
2311    /**
2312     * <p>Return the current color selected for normal text.</p>
2313     *
2314     * @return Returns the current text color.
2315     */
2316    public final int getCurrentTextColor() {
2317        return mCurTextColor;
2318    }
2319
2320    /**
2321     * Sets the color used to display the selection highlight.
2322     *
2323     * @attr ref android.R.styleable#TextView_textColorHighlight
2324     */
2325    @android.view.RemotableViewMethod
2326    public void setHighlightColor(int color) {
2327        if (mHighlightColor != color) {
2328            mHighlightColor = color;
2329            if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
2330            invalidate();
2331        }
2332    }
2333
2334    /**
2335     * Gives the text a shadow of the specified radius and color, the specified
2336     * distance from its normal position.
2337     *
2338     * @attr ref android.R.styleable#TextView_shadowColor
2339     * @attr ref android.R.styleable#TextView_shadowDx
2340     * @attr ref android.R.styleable#TextView_shadowDy
2341     * @attr ref android.R.styleable#TextView_shadowRadius
2342     */
2343    public void setShadowLayer(float radius, float dx, float dy, int color) {
2344        mTextPaint.setShadowLayer(radius, dx, dy, color);
2345
2346        mShadowRadius = radius;
2347        mShadowDx = dx;
2348        mShadowDy = dy;
2349
2350        if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
2351        invalidate();
2352    }
2353
2354    /**
2355     * @return the base paint used for the text.  Please use this only to
2356     * consult the Paint's properties and not to change them.
2357     */
2358    public TextPaint getPaint() {
2359        return mTextPaint;
2360    }
2361
2362    /**
2363     * Sets the autolink mask of the text.  See {@link
2364     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2365     * possible values.
2366     *
2367     * @attr ref android.R.styleable#TextView_autoLink
2368     */
2369    @android.view.RemotableViewMethod
2370    public final void setAutoLinkMask(int mask) {
2371        mAutoLinkMask = mask;
2372    }
2373
2374    /**
2375     * Sets whether the movement method will automatically be set to
2376     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2377     * set to nonzero and links are detected in {@link #setText}.
2378     * The default is true.
2379     *
2380     * @attr ref android.R.styleable#TextView_linksClickable
2381     */
2382    @android.view.RemotableViewMethod
2383    public final void setLinksClickable(boolean whether) {
2384        mLinksClickable = whether;
2385    }
2386
2387    /**
2388     * Returns whether the movement method will automatically be set to
2389     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2390     * set to nonzero and links are detected in {@link #setText}.
2391     * The default is true.
2392     *
2393     * @attr ref android.R.styleable#TextView_linksClickable
2394     */
2395    public final boolean getLinksClickable() {
2396        return mLinksClickable;
2397    }
2398
2399    /**
2400     * Returns the list of URLSpans attached to the text
2401     * (by {@link Linkify} or otherwise) if any.  You can call
2402     * {@link URLSpan#getURL} on them to find where they link to
2403     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2404     * to find the region of the text they are attached to.
2405     */
2406    public URLSpan[] getUrls() {
2407        if (mText instanceof Spanned) {
2408            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2409        } else {
2410            return new URLSpan[0];
2411        }
2412    }
2413
2414    /**
2415     * Sets the color of the hint text.
2416     *
2417     * @attr ref android.R.styleable#TextView_textColorHint
2418     */
2419    @android.view.RemotableViewMethod
2420    public final void setHintTextColor(int color) {
2421        mHintTextColor = ColorStateList.valueOf(color);
2422        updateTextColors();
2423    }
2424
2425    /**
2426     * Sets the color of the hint text.
2427     *
2428     * @attr ref android.R.styleable#TextView_textColorHint
2429     */
2430    public final void setHintTextColor(ColorStateList colors) {
2431        mHintTextColor = colors;
2432        updateTextColors();
2433    }
2434
2435    /**
2436     * <p>Return the color used to paint the hint text.</p>
2437     *
2438     * @return Returns the list of hint text colors.
2439     */
2440    public final ColorStateList getHintTextColors() {
2441        return mHintTextColor;
2442    }
2443
2444    /**
2445     * <p>Return the current color selected to paint the hint text.</p>
2446     *
2447     * @return Returns the current hint text color.
2448     */
2449    public final int getCurrentHintTextColor() {
2450        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2451    }
2452
2453    /**
2454     * Sets the color of links in the text.
2455     *
2456     * @attr ref android.R.styleable#TextView_textColorLink
2457     */
2458    @android.view.RemotableViewMethod
2459    public final void setLinkTextColor(int color) {
2460        mLinkTextColor = ColorStateList.valueOf(color);
2461        updateTextColors();
2462    }
2463
2464    /**
2465     * Sets the color of links in the text.
2466     *
2467     * @attr ref android.R.styleable#TextView_textColorLink
2468     */
2469    public final void setLinkTextColor(ColorStateList colors) {
2470        mLinkTextColor = colors;
2471        updateTextColors();
2472    }
2473
2474    /**
2475     * <p>Returns the color used to paint links in the text.</p>
2476     *
2477     * @return Returns the list of link text colors.
2478     */
2479    public final ColorStateList getLinkTextColors() {
2480        return mLinkTextColor;
2481    }
2482
2483    /**
2484     * Sets the horizontal alignment of the text and the
2485     * vertical gravity that will be used when there is extra space
2486     * in the TextView beyond what is required for the text itself.
2487     *
2488     * @see android.view.Gravity
2489     * @attr ref android.R.styleable#TextView_gravity
2490     */
2491    public void setGravity(int gravity) {
2492        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2493            gravity |= Gravity.START;
2494        }
2495        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2496            gravity |= Gravity.TOP;
2497        }
2498
2499        boolean newLayout = false;
2500
2501        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2502            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2503            newLayout = true;
2504        }
2505
2506        if (gravity != mGravity) {
2507            invalidate();
2508            mLayoutAlignment = null;
2509        }
2510
2511        mGravity = gravity;
2512
2513        if (mLayout != null && newLayout) {
2514            // XXX this is heavy-handed because no actual content changes.
2515            int want = mLayout.getWidth();
2516            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2517
2518            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2519                          mRight - mLeft - getCompoundPaddingLeft() -
2520                          getCompoundPaddingRight(), true);
2521        }
2522    }
2523
2524    /**
2525     * Returns the horizontal and vertical alignment of this TextView.
2526     *
2527     * @see android.view.Gravity
2528     * @attr ref android.R.styleable#TextView_gravity
2529     */
2530    public int getGravity() {
2531        return mGravity;
2532    }
2533
2534    /**
2535     * @return the flags on the Paint being used to display the text.
2536     * @see Paint#getFlags
2537     */
2538    public int getPaintFlags() {
2539        return mTextPaint.getFlags();
2540    }
2541
2542    /**
2543     * Sets flags on the Paint being used to display the text and
2544     * reflows the text if they are different from the old flags.
2545     * @see Paint#setFlags
2546     */
2547    @android.view.RemotableViewMethod
2548    public void setPaintFlags(int flags) {
2549        if (mTextPaint.getFlags() != flags) {
2550            mTextPaint.setFlags(flags);
2551
2552            if (mLayout != null) {
2553                nullLayouts();
2554                requestLayout();
2555                invalidate();
2556            }
2557        }
2558    }
2559
2560    /**
2561     * Sets whether the text should be allowed to be wider than the
2562     * View is.  If false, it will be wrapped to the width of the View.
2563     *
2564     * @attr ref android.R.styleable#TextView_scrollHorizontally
2565     */
2566    public void setHorizontallyScrolling(boolean whether) {
2567        if (mHorizontallyScrolling != whether) {
2568            mHorizontallyScrolling = whether;
2569
2570            if (mLayout != null) {
2571                nullLayouts();
2572                requestLayout();
2573                invalidate();
2574            }
2575        }
2576    }
2577
2578    /**
2579     * Returns whether the text is allowed to be wider than the View is.
2580     * If false, the text will be wrapped to the width of the View.
2581     *
2582     * @attr ref android.R.styleable#TextView_scrollHorizontally
2583     * @hide
2584     */
2585    public boolean getHorizontallyScrolling() {
2586        return mHorizontallyScrolling;
2587    }
2588
2589    /**
2590     * Makes the TextView at least this many lines tall.
2591     *
2592     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2593     * set this value to 1.
2594     *
2595     * @attr ref android.R.styleable#TextView_minLines
2596     */
2597    @android.view.RemotableViewMethod
2598    public void setMinLines(int minlines) {
2599        mMinimum = minlines;
2600        mMinMode = LINES;
2601
2602        requestLayout();
2603        invalidate();
2604    }
2605
2606    /**
2607     * Makes the TextView at least this many pixels tall.
2608     *
2609     * Setting this value overrides any other (minimum) number of lines setting.
2610     *
2611     * @attr ref android.R.styleable#TextView_minHeight
2612     */
2613    @android.view.RemotableViewMethod
2614    public void setMinHeight(int minHeight) {
2615        mMinimum = minHeight;
2616        mMinMode = PIXELS;
2617
2618        requestLayout();
2619        invalidate();
2620    }
2621
2622    /**
2623     * Makes the TextView at most this many lines tall.
2624     *
2625     * Setting this value overrides any other (maximum) height setting.
2626     *
2627     * @attr ref android.R.styleable#TextView_maxLines
2628     */
2629    @android.view.RemotableViewMethod
2630    public void setMaxLines(int maxlines) {
2631        mMaximum = maxlines;
2632        mMaxMode = LINES;
2633
2634        requestLayout();
2635        invalidate();
2636    }
2637
2638    /**
2639     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2640     * {@link #setMaxLines(int)} method.
2641     *
2642     * Setting this value overrides any other (maximum) number of lines setting.
2643     *
2644     * @attr ref android.R.styleable#TextView_maxHeight
2645     */
2646    @android.view.RemotableViewMethod
2647    public void setMaxHeight(int maxHeight) {
2648        mMaximum = maxHeight;
2649        mMaxMode = PIXELS;
2650
2651        requestLayout();
2652        invalidate();
2653    }
2654
2655    /**
2656     * Makes the TextView exactly this many lines tall.
2657     *
2658     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2659     * height setting. A single line TextView will set this value to 1.
2660     *
2661     * @attr ref android.R.styleable#TextView_lines
2662     */
2663    @android.view.RemotableViewMethod
2664    public void setLines(int lines) {
2665        mMaximum = mMinimum = lines;
2666        mMaxMode = mMinMode = LINES;
2667
2668        requestLayout();
2669        invalidate();
2670    }
2671
2672    /**
2673     * Makes the TextView exactly this many pixels tall.
2674     * You could do the same thing by specifying this number in the
2675     * LayoutParams.
2676     *
2677     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2678     * height setting.
2679     *
2680     * @attr ref android.R.styleable#TextView_height
2681     */
2682    @android.view.RemotableViewMethod
2683    public void setHeight(int pixels) {
2684        mMaximum = mMinimum = pixels;
2685        mMaxMode = mMinMode = PIXELS;
2686
2687        requestLayout();
2688        invalidate();
2689    }
2690
2691    /**
2692     * Makes the TextView at least this many ems wide
2693     *
2694     * @attr ref android.R.styleable#TextView_minEms
2695     */
2696    @android.view.RemotableViewMethod
2697    public void setMinEms(int minems) {
2698        mMinWidth = minems;
2699        mMinWidthMode = EMS;
2700
2701        requestLayout();
2702        invalidate();
2703    }
2704
2705    /**
2706     * Makes the TextView at least this many pixels wide
2707     *
2708     * @attr ref android.R.styleable#TextView_minWidth
2709     */
2710    @android.view.RemotableViewMethod
2711    public void setMinWidth(int minpixels) {
2712        mMinWidth = minpixels;
2713        mMinWidthMode = PIXELS;
2714
2715        requestLayout();
2716        invalidate();
2717    }
2718
2719    /**
2720     * Makes the TextView at most this many ems wide
2721     *
2722     * @attr ref android.R.styleable#TextView_maxEms
2723     */
2724    @android.view.RemotableViewMethod
2725    public void setMaxEms(int maxems) {
2726        mMaxWidth = maxems;
2727        mMaxWidthMode = EMS;
2728
2729        requestLayout();
2730        invalidate();
2731    }
2732
2733    /**
2734     * Makes the TextView at most this many pixels wide
2735     *
2736     * @attr ref android.R.styleable#TextView_maxWidth
2737     */
2738    @android.view.RemotableViewMethod
2739    public void setMaxWidth(int maxpixels) {
2740        mMaxWidth = maxpixels;
2741        mMaxWidthMode = PIXELS;
2742
2743        requestLayout();
2744        invalidate();
2745    }
2746
2747    /**
2748     * Makes the TextView exactly this many ems wide
2749     *
2750     * @attr ref android.R.styleable#TextView_ems
2751     */
2752    @android.view.RemotableViewMethod
2753    public void setEms(int ems) {
2754        mMaxWidth = mMinWidth = ems;
2755        mMaxWidthMode = mMinWidthMode = EMS;
2756
2757        requestLayout();
2758        invalidate();
2759    }
2760
2761    /**
2762     * Makes the TextView exactly this many pixels wide.
2763     * You could do the same thing by specifying this number in the
2764     * LayoutParams.
2765     *
2766     * @attr ref android.R.styleable#TextView_width
2767     */
2768    @android.view.RemotableViewMethod
2769    public void setWidth(int pixels) {
2770        mMaxWidth = mMinWidth = pixels;
2771        mMaxWidthMode = mMinWidthMode = PIXELS;
2772
2773        requestLayout();
2774        invalidate();
2775    }
2776
2777
2778    /**
2779     * Sets line spacing for this TextView.  Each line will have its height
2780     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2781     *
2782     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2783     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2784     */
2785    public void setLineSpacing(float add, float mult) {
2786        if (mSpacingAdd != add || mSpacingMult != mult) {
2787            mSpacingAdd = add;
2788            mSpacingMult = mult;
2789
2790            if (mLayout != null) {
2791                nullLayouts();
2792                requestLayout();
2793                invalidate();
2794            }
2795        }
2796    }
2797
2798    /**
2799     * Convenience method: Append the specified text to the TextView's
2800     * display buffer, upgrading it to BufferType.EDITABLE if it was
2801     * not already editable.
2802     */
2803    public final void append(CharSequence text) {
2804        append(text, 0, text.length());
2805    }
2806
2807    /**
2808     * Convenience method: Append the specified text slice to the TextView's
2809     * display buffer, upgrading it to BufferType.EDITABLE if it was
2810     * not already editable.
2811     */
2812    public void append(CharSequence text, int start, int end) {
2813        if (!(mText instanceof Editable)) {
2814            setText(mText, BufferType.EDITABLE);
2815        }
2816
2817        ((Editable) mText).append(text, start, end);
2818    }
2819
2820    private void updateTextColors() {
2821        boolean inval = false;
2822        int color = mTextColor.getColorForState(getDrawableState(), 0);
2823        if (color != mCurTextColor) {
2824            mCurTextColor = color;
2825            inval = true;
2826        }
2827        if (mLinkTextColor != null) {
2828            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2829            if (color != mTextPaint.linkColor) {
2830                mTextPaint.linkColor = color;
2831                inval = true;
2832            }
2833        }
2834        if (mHintTextColor != null) {
2835            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2836            if (color != mCurHintTextColor && mText.length() == 0) {
2837                mCurHintTextColor = color;
2838                inval = true;
2839            }
2840        }
2841        if (inval) {
2842            if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
2843            invalidate();
2844        }
2845    }
2846
2847    @Override
2848    protected void drawableStateChanged() {
2849        super.drawableStateChanged();
2850        if (mTextColor != null && mTextColor.isStateful()
2851                || (mHintTextColor != null && mHintTextColor.isStateful())
2852                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2853            updateTextColors();
2854        }
2855
2856        final Drawables dr = mDrawables;
2857        if (dr != null) {
2858            int[] state = getDrawableState();
2859            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2860                dr.mDrawableTop.setState(state);
2861            }
2862            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2863                dr.mDrawableBottom.setState(state);
2864            }
2865            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2866                dr.mDrawableLeft.setState(state);
2867            }
2868            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2869                dr.mDrawableRight.setState(state);
2870            }
2871            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2872                dr.mDrawableStart.setState(state);
2873            }
2874            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2875                dr.mDrawableEnd.setState(state);
2876            }
2877        }
2878    }
2879
2880    @Override
2881    public Parcelable onSaveInstanceState() {
2882        Parcelable superState = super.onSaveInstanceState();
2883
2884        // Save state if we are forced to
2885        boolean save = mFreezesText;
2886        int start = 0;
2887        int end = 0;
2888
2889        if (mText != null) {
2890            start = getSelectionStart();
2891            end = getSelectionEnd();
2892            if (start >= 0 || end >= 0) {
2893                // Or save state if there is a selection
2894                save = true;
2895            }
2896        }
2897
2898        if (save) {
2899            SavedState ss = new SavedState(superState);
2900            // XXX Should also save the current scroll position!
2901            ss.selStart = start;
2902            ss.selEnd = end;
2903
2904            if (mText instanceof Spanned) {
2905                /*
2906                 * Calling setText() strips off any ChangeWatchers;
2907                 * strip them now to avoid leaking references.
2908                 * But do it to a copy so that if there are any
2909                 * further changes to the text of this view, it
2910                 * won't get into an inconsistent state.
2911                 */
2912
2913                Spannable sp = new SpannableString(mText);
2914
2915                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2916                    sp.removeSpan(cw);
2917                }
2918
2919                if (mEditor != null) {
2920                    removeMisspelledSpans(sp);
2921                    sp.removeSpan(getEditor().mSuggestionRangeSpan);
2922                }
2923
2924                ss.text = sp;
2925            } else {
2926                ss.text = mText.toString();
2927            }
2928
2929            if (isFocused() && start >= 0 && end >= 0) {
2930                ss.frozenWithFocus = true;
2931            }
2932
2933            ss.error = getError();
2934
2935            return ss;
2936        }
2937
2938        return superState;
2939    }
2940
2941    void removeMisspelledSpans(Spannable spannable) {
2942        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
2943                SuggestionSpan.class);
2944        for (int i = 0; i < suggestionSpans.length; i++) {
2945            int flags = suggestionSpans[i].getFlags();
2946            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
2947                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
2948                spannable.removeSpan(suggestionSpans[i]);
2949            }
2950        }
2951    }
2952
2953    @Override
2954    public void onRestoreInstanceState(Parcelable state) {
2955        if (!(state instanceof SavedState)) {
2956            super.onRestoreInstanceState(state);
2957            return;
2958        }
2959
2960        SavedState ss = (SavedState)state;
2961        super.onRestoreInstanceState(ss.getSuperState());
2962
2963        // XXX restore buffer type too, as well as lots of other stuff
2964        if (ss.text != null) {
2965            setText(ss.text);
2966        }
2967
2968        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2969            if (mText instanceof Spannable) {
2970                int len = mText.length();
2971
2972                if (ss.selStart > len || ss.selEnd > len) {
2973                    String restored = "";
2974
2975                    if (ss.text != null) {
2976                        restored = "(restored) ";
2977                    }
2978
2979                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2980                          "/" + ss.selEnd + " out of range for " + restored +
2981                          "text " + mText);
2982                } else {
2983                    Selection.setSelection((Spannable) mText, ss.selStart,
2984                                           ss.selEnd);
2985
2986                    if (ss.frozenWithFocus) {
2987                        createEditorIfNeeded("restore instance with focus");
2988                        getEditor().mFrozenWithFocus = true;
2989                    }
2990                }
2991            }
2992        }
2993
2994        if (ss.error != null) {
2995            final CharSequence error = ss.error;
2996            // Display the error later, after the first layout pass
2997            post(new Runnable() {
2998                public void run() {
2999                    setError(error);
3000                }
3001            });
3002        }
3003    }
3004
3005    /**
3006     * Control whether this text view saves its entire text contents when
3007     * freezing to an icicle, in addition to dynamic state such as cursor
3008     * position.  By default this is false, not saving the text.  Set to true
3009     * if the text in the text view is not being saved somewhere else in
3010     * persistent storage (such as in a content provider) so that if the
3011     * view is later thawed the user will not lose their data.
3012     *
3013     * @param freezesText Controls whether a frozen icicle should include the
3014     * entire text data: true to include it, false to not.
3015     *
3016     * @attr ref android.R.styleable#TextView_freezesText
3017     */
3018    @android.view.RemotableViewMethod
3019    public void setFreezesText(boolean freezesText) {
3020        mFreezesText = freezesText;
3021    }
3022
3023    /**
3024     * Return whether this text view is including its entire text contents
3025     * in frozen icicles.
3026     *
3027     * @return Returns true if text is included, false if it isn't.
3028     *
3029     * @see #setFreezesText
3030     */
3031    public boolean getFreezesText() {
3032        return mFreezesText;
3033    }
3034
3035    ///////////////////////////////////////////////////////////////////////////
3036
3037    /**
3038     * Sets the Factory used to create new Editables.
3039     */
3040    public final void setEditableFactory(Editable.Factory factory) {
3041        mEditableFactory = factory;
3042        setText(mText);
3043    }
3044
3045    /**
3046     * Sets the Factory used to create new Spannables.
3047     */
3048    public final void setSpannableFactory(Spannable.Factory factory) {
3049        mSpannableFactory = factory;
3050        setText(mText);
3051    }
3052
3053    /**
3054     * Sets the string value of the TextView. TextView <em>does not</em> accept
3055     * HTML-like formatting, which you can do with text strings in XML resource files.
3056     * To style your strings, attach android.text.style.* objects to a
3057     * {@link android.text.SpannableString SpannableString}, or see the
3058     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3059     * Available Resource Types</a> documentation for an example of setting
3060     * formatted text in the XML resource file.
3061     *
3062     * @attr ref android.R.styleable#TextView_text
3063     */
3064    @android.view.RemotableViewMethod
3065    public final void setText(CharSequence text) {
3066        setText(text, mBufferType);
3067    }
3068
3069    /**
3070     * Like {@link #setText(CharSequence)},
3071     * except that the cursor position (if any) is retained in the new text.
3072     *
3073     * @param text The new text to place in the text view.
3074     *
3075     * @see #setText(CharSequence)
3076     */
3077    @android.view.RemotableViewMethod
3078    public final void setTextKeepState(CharSequence text) {
3079        setTextKeepState(text, mBufferType);
3080    }
3081
3082    /**
3083     * Sets the text that this TextView is to display (see
3084     * {@link #setText(CharSequence)}) and also sets whether it is stored
3085     * in a styleable/spannable buffer and whether it is editable.
3086     *
3087     * @attr ref android.R.styleable#TextView_text
3088     * @attr ref android.R.styleable#TextView_bufferType
3089     */
3090    public void setText(CharSequence text, BufferType type) {
3091        setText(text, type, true, 0);
3092
3093        if (mCharWrapper != null) {
3094            mCharWrapper.mChars = null;
3095        }
3096    }
3097
3098    private void setText(CharSequence text, BufferType type,
3099                         boolean notifyBefore, int oldlen) {
3100        if (text == null) {
3101            text = "";
3102        }
3103
3104        // If suggestions are not enabled, remove the suggestion spans from the text
3105        if (!isSuggestionsEnabled()) {
3106            text = removeSuggestionSpans(text);
3107        }
3108
3109        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3110
3111        if (text instanceof Spanned &&
3112            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3113            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3114                setHorizontalFadingEdgeEnabled(true);
3115                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3116            } else {
3117                setHorizontalFadingEdgeEnabled(false);
3118                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3119            }
3120            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3121        }
3122
3123        int n = mFilters.length;
3124        for (int i = 0; i < n; i++) {
3125            CharSequence out = mFilters[i].filter(text, 0, text.length(), EMPTY_SPANNED, 0, 0);
3126            if (out != null) {
3127                text = out;
3128            }
3129        }
3130
3131        if (notifyBefore) {
3132            if (mText != null) {
3133                oldlen = mText.length();
3134                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3135            } else {
3136                sendBeforeTextChanged("", 0, 0, text.length());
3137            }
3138        }
3139
3140        boolean needEditableForNotification = false;
3141
3142        if (mListeners != null && mListeners.size() != 0) {
3143            needEditableForNotification = true;
3144        }
3145
3146        if (type == BufferType.EDITABLE || getKeyListener() != null || needEditableForNotification) {
3147            createEditorIfNeeded("setText with BufferType.EDITABLE or non null mInput");
3148            Editable t = mEditableFactory.newEditable(text);
3149            text = t;
3150            setFilters(t, mFilters);
3151            InputMethodManager imm = InputMethodManager.peekInstance();
3152            if (imm != null) imm.restartInput(this);
3153        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3154            text = mSpannableFactory.newSpannable(text);
3155        } else if (!(text instanceof CharWrapper)) {
3156            text = TextUtils.stringOrSpannedString(text);
3157        }
3158
3159        if (mAutoLinkMask != 0) {
3160            Spannable s2;
3161
3162            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3163                s2 = (Spannable) text;
3164            } else {
3165                s2 = mSpannableFactory.newSpannable(text);
3166            }
3167
3168            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3169                text = s2;
3170                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3171
3172                /*
3173                 * We must go ahead and set the text before changing the
3174                 * movement method, because setMovementMethod() may call
3175                 * setText() again to try to upgrade the buffer type.
3176                 */
3177                mText = text;
3178
3179                // Do not change the movement method for text that support text selection as it
3180                // would prevent an arbitrary cursor displacement.
3181                if (mLinksClickable && !textCanBeSelected()) {
3182                    setMovementMethod(LinkMovementMethod.getInstance());
3183                }
3184            }
3185        }
3186
3187        mBufferType = type;
3188        mText = text;
3189
3190        if (mTransformation == null) {
3191            mTransformed = text;
3192        } else {
3193            mTransformed = mTransformation.getTransformation(text, this);
3194        }
3195
3196        final int textLength = text.length();
3197
3198        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3199            Spannable sp = (Spannable) text;
3200
3201            // Remove any ChangeWatchers that might have come
3202            // from other TextViews.
3203            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3204            final int count = watchers.length;
3205            for (int i = 0; i < count; i++)
3206                sp.removeSpan(watchers[i]);
3207
3208            if (mChangeWatcher == null)
3209                mChangeWatcher = new ChangeWatcher();
3210
3211            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3212                       (CHANGE_WATCHER_PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3213
3214            if (mEditor != null && getEditor().mKeyListener != null) {
3215                sp.setSpan(getEditor().mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3216            }
3217
3218            if (mTransformation != null) {
3219                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3220            }
3221
3222            if (mMovement != null) {
3223                mMovement.initialize(this, (Spannable) text);
3224
3225                /*
3226                 * Initializing the movement method will have set the
3227                 * selection, so reset mSelectionMoved to keep that from
3228                 * interfering with the normal on-focus selection-setting.
3229                 */
3230                if (mEditor != null) getEditor().mSelectionMoved = false;
3231            }
3232        }
3233
3234        if (mLayout != null) {
3235            checkForRelayout();
3236        }
3237
3238        sendOnTextChanged(text, 0, oldlen, textLength);
3239        onTextChanged(text, 0, oldlen, textLength);
3240
3241        if (needEditableForNotification) {
3242            sendAfterTextChanged((Editable) text);
3243        }
3244
3245        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3246        prepareCursorControllers();
3247    }
3248
3249    /**
3250     * Sets the TextView to display the specified slice of the specified
3251     * char array.  You must promise that you will not change the contents
3252     * of the array except for right before another call to setText(),
3253     * since the TextView has no way to know that the text
3254     * has changed and that it needs to invalidate and re-layout.
3255     */
3256    public final void setText(char[] text, int start, int len) {
3257        int oldlen = 0;
3258
3259        if (start < 0 || len < 0 || start + len > text.length) {
3260            throw new IndexOutOfBoundsException(start + ", " + len);
3261        }
3262
3263        /*
3264         * We must do the before-notification here ourselves because if
3265         * the old text is a CharWrapper we destroy it before calling
3266         * into the normal path.
3267         */
3268        if (mText != null) {
3269            oldlen = mText.length();
3270            sendBeforeTextChanged(mText, 0, oldlen, len);
3271        } else {
3272            sendBeforeTextChanged("", 0, 0, len);
3273        }
3274
3275        if (mCharWrapper == null) {
3276            mCharWrapper = new CharWrapper(text, start, len);
3277        } else {
3278            mCharWrapper.set(text, start, len);
3279        }
3280
3281        setText(mCharWrapper, mBufferType, false, oldlen);
3282    }
3283
3284    /**
3285     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3286     * except that the cursor position (if any) is retained in the new text.
3287     *
3288     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3289     */
3290    public final void setTextKeepState(CharSequence text, BufferType type) {
3291        int start = getSelectionStart();
3292        int end = getSelectionEnd();
3293        int len = text.length();
3294
3295        setText(text, type);
3296
3297        if (start >= 0 || end >= 0) {
3298            if (mText instanceof Spannable) {
3299                Selection.setSelection((Spannable) mText,
3300                                       Math.max(0, Math.min(start, len)),
3301                                       Math.max(0, Math.min(end, len)));
3302            }
3303        }
3304    }
3305
3306    @android.view.RemotableViewMethod
3307    public final void setText(int resid) {
3308        setText(getContext().getResources().getText(resid));
3309    }
3310
3311    public final void setText(int resid, BufferType type) {
3312        setText(getContext().getResources().getText(resid), type);
3313    }
3314
3315    /**
3316     * Sets the text to be displayed when the text of the TextView is empty.
3317     * Null means to use the normal empty text. The hint does not currently
3318     * participate in determining the size of the view.
3319     *
3320     * @attr ref android.R.styleable#TextView_hint
3321     */
3322    @android.view.RemotableViewMethod
3323    public final void setHint(CharSequence hint) {
3324        mHint = TextUtils.stringOrSpannedString(hint);
3325
3326        if (mLayout != null) {
3327            checkForRelayout();
3328        }
3329
3330        if (mText.length() == 0) {
3331            invalidate();
3332        }
3333
3334        // Invalidate display list if hint will be used
3335        if (mEditor != null && mText.length() == 0 && mHint != null) {
3336            getEditor().mTextDisplayListIsValid = false;
3337        }
3338    }
3339
3340    /**
3341     * Sets the text to be displayed when the text of the TextView is empty,
3342     * from a resource.
3343     *
3344     * @attr ref android.R.styleable#TextView_hint
3345     */
3346    @android.view.RemotableViewMethod
3347    public final void setHint(int resid) {
3348        setHint(getContext().getResources().getText(resid));
3349    }
3350
3351    /**
3352     * Returns the hint that is displayed when the text of the TextView
3353     * is empty.
3354     *
3355     * @attr ref android.R.styleable#TextView_hint
3356     */
3357    @ViewDebug.CapturedViewProperty
3358    public CharSequence getHint() {
3359        return mHint;
3360    }
3361
3362    private static boolean isMultilineInputType(int type) {
3363        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3364            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3365    }
3366
3367    /**
3368     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3369     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3370     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3371     * then a soft keyboard will not be displayed for this text view.
3372     *
3373     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3374     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3375     * type.
3376     *
3377     * @see #getInputType()
3378     * @see #setRawInputType(int)
3379     * @see android.text.InputType
3380     * @attr ref android.R.styleable#TextView_inputType
3381     */
3382    public void setInputType(int type) {
3383        final boolean wasPassword = isPasswordInputType(getInputType());
3384        final boolean wasVisiblePassword = isVisiblePasswordInputType(getInputType());
3385        setInputType(type, false);
3386        final boolean isPassword = isPasswordInputType(type);
3387        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3388        boolean forceUpdate = false;
3389        if (isPassword) {
3390            setTransformationMethod(PasswordTransformationMethod.getInstance());
3391            setTypefaceByIndex(MONOSPACE, 0);
3392        } else if (isVisiblePassword) {
3393            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3394                forceUpdate = true;
3395            }
3396            setTypefaceByIndex(MONOSPACE, 0);
3397        } else if (wasPassword || wasVisiblePassword) {
3398            // not in password mode, clean up typeface and transformation
3399            setTypefaceByIndex(-1, -1);
3400            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3401                forceUpdate = true;
3402            }
3403        }
3404
3405        boolean singleLine = !isMultilineInputType(type);
3406
3407        // We need to update the single line mode if it has changed or we
3408        // were previously in password mode.
3409        if (mSingleLine != singleLine || forceUpdate) {
3410            // Change single line mode, but only change the transformation if
3411            // we are not in password mode.
3412            applySingleLine(singleLine, !isPassword, true);
3413        }
3414
3415        if (!isSuggestionsEnabled()) {
3416            mText = removeSuggestionSpans(mText);
3417        }
3418
3419        InputMethodManager imm = InputMethodManager.peekInstance();
3420        if (imm != null) imm.restartInput(this);
3421    }
3422
3423    /**
3424     * It would be better to rely on the input type for everything. A password inputType should have
3425     * a password transformation. We should hence use isPasswordInputType instead of this method.
3426     *
3427     * We should:
3428     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3429     * would install the correct transformation).
3430     * - Refuse the installation of a non-password transformation in setTransformation if the input
3431     * type is password.
3432     *
3433     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3434     * is useful since it matches what the user can see (obfuscated text or not).
3435     *
3436     * @return true if the current transformation method is of the password type.
3437     */
3438    private boolean hasPasswordTransformationMethod() {
3439        return mTransformation instanceof PasswordTransformationMethod;
3440    }
3441
3442    private static boolean isPasswordInputType(int inputType) {
3443        final int variation =
3444                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3445        return variation
3446                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3447                || variation
3448                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3449                || variation
3450                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3451    }
3452
3453    private static boolean isVisiblePasswordInputType(int inputType) {
3454        final int variation =
3455                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3456        return variation
3457                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3458    }
3459
3460    /**
3461     * Directly change the content type integer of the text view, without
3462     * modifying any other state.
3463     * @see #setInputType(int)
3464     * @see android.text.InputType
3465     * @attr ref android.R.styleable#TextView_inputType
3466     */
3467    public void setRawInputType(int type) {
3468        if (type == InputType.TYPE_NULL && mEditor == null) return; //TYPE_NULL is the default value
3469        createEditorIfNeeded("non null input type");
3470        getEditor().mInputType = type;
3471    }
3472
3473    private void setInputType(int type, boolean direct) {
3474        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3475        KeyListener input;
3476        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3477            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3478            TextKeyListener.Capitalize cap;
3479            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3480                cap = TextKeyListener.Capitalize.CHARACTERS;
3481            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3482                cap = TextKeyListener.Capitalize.WORDS;
3483            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3484                cap = TextKeyListener.Capitalize.SENTENCES;
3485            } else {
3486                cap = TextKeyListener.Capitalize.NONE;
3487            }
3488            input = TextKeyListener.getInstance(autotext, cap);
3489        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3490            input = DigitsKeyListener.getInstance(
3491                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3492                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3493        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3494            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3495                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3496                    input = DateKeyListener.getInstance();
3497                    break;
3498                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3499                    input = TimeKeyListener.getInstance();
3500                    break;
3501                default:
3502                    input = DateTimeKeyListener.getInstance();
3503                    break;
3504            }
3505        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3506            input = DialerKeyListener.getInstance();
3507        } else {
3508            input = TextKeyListener.getInstance();
3509        }
3510        setRawInputType(type);
3511        if (direct) {
3512            createEditorIfNeeded("setInputType");
3513            getEditor().mKeyListener = input;
3514        } else {
3515            setKeyListenerOnly(input);
3516        }
3517    }
3518
3519    /**
3520     * Get the type of the editable content.
3521     *
3522     * @see #setInputType(int)
3523     * @see android.text.InputType
3524     */
3525    public int getInputType() {
3526        return mEditor == null ? EditorInfo.TYPE_NULL : getEditor().mInputType;
3527    }
3528
3529    /**
3530     * Change the editor type integer associated with the text view, which
3531     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3532     * has focus.
3533     * @see #getImeOptions
3534     * @see android.view.inputmethod.EditorInfo
3535     * @attr ref android.R.styleable#TextView_imeOptions
3536     */
3537    public void setImeOptions(int imeOptions) {
3538        createEditorIfNeeded("IME options specified");
3539        if (getEditor().mInputContentType == null) {
3540            getEditor().mInputContentType = new InputContentType();
3541        }
3542        getEditor().mInputContentType.imeOptions = imeOptions;
3543    }
3544
3545    /**
3546     * Get the type of the IME editor.
3547     *
3548     * @see #setImeOptions(int)
3549     * @see android.view.inputmethod.EditorInfo
3550     */
3551    public int getImeOptions() {
3552        return mEditor != null && getEditor().mInputContentType != null
3553                ? getEditor().mInputContentType.imeOptions : EditorInfo.IME_NULL;
3554    }
3555
3556    /**
3557     * Change the custom IME action associated with the text view, which
3558     * will be reported to an IME with {@link EditorInfo#actionLabel}
3559     * and {@link EditorInfo#actionId} when it has focus.
3560     * @see #getImeActionLabel
3561     * @see #getImeActionId
3562     * @see android.view.inputmethod.EditorInfo
3563     * @attr ref android.R.styleable#TextView_imeActionLabel
3564     * @attr ref android.R.styleable#TextView_imeActionId
3565     */
3566    public void setImeActionLabel(CharSequence label, int actionId) {
3567        createEditorIfNeeded("IME action label specified");
3568        if (getEditor().mInputContentType == null) {
3569            getEditor().mInputContentType = new InputContentType();
3570        }
3571        getEditor().mInputContentType.imeActionLabel = label;
3572        getEditor().mInputContentType.imeActionId = actionId;
3573    }
3574
3575    /**
3576     * Get the IME action label previous set with {@link #setImeActionLabel}.
3577     *
3578     * @see #setImeActionLabel
3579     * @see android.view.inputmethod.EditorInfo
3580     */
3581    public CharSequence getImeActionLabel() {
3582        return mEditor != null && getEditor().mInputContentType != null
3583                ? getEditor().mInputContentType.imeActionLabel : null;
3584    }
3585
3586    /**
3587     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3588     *
3589     * @see #setImeActionLabel
3590     * @see android.view.inputmethod.EditorInfo
3591     */
3592    public int getImeActionId() {
3593        return mEditor != null && getEditor().mInputContentType != null
3594                ? getEditor().mInputContentType.imeActionId : 0;
3595    }
3596
3597    /**
3598     * Set a special listener to be called when an action is performed
3599     * on the text view.  This will be called when the enter key is pressed,
3600     * or when an action supplied to the IME is selected by the user.  Setting
3601     * this means that the normal hard key event will not insert a newline
3602     * into the text view, even if it is multi-line; holding down the ALT
3603     * modifier will, however, allow the user to insert a newline character.
3604     */
3605    public void setOnEditorActionListener(OnEditorActionListener l) {
3606        createEditorIfNeeded("Editor action listener set");
3607        if (getEditor().mInputContentType == null) {
3608            getEditor().mInputContentType = new InputContentType();
3609        }
3610        getEditor().mInputContentType.onEditorActionListener = l;
3611    }
3612
3613    /**
3614     * Called when an attached input method calls
3615     * {@link InputConnection#performEditorAction(int)
3616     * InputConnection.performEditorAction()}
3617     * for this text view.  The default implementation will call your action
3618     * listener supplied to {@link #setOnEditorActionListener}, or perform
3619     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3620     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3621     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3622     * EditorInfo.IME_ACTION_DONE}.
3623     *
3624     * <p>For backwards compatibility, if no IME options have been set and the
3625     * text view would not normally advance focus on enter, then
3626     * the NEXT and DONE actions received here will be turned into an enter
3627     * key down/up pair to go through the normal key handling.
3628     *
3629     * @param actionCode The code of the action being performed.
3630     *
3631     * @see #setOnEditorActionListener
3632     */
3633    public void onEditorAction(int actionCode) {
3634        final InputContentType ict = mEditor == null ? null : getEditor().mInputContentType;
3635        if (ict != null) {
3636            if (ict.onEditorActionListener != null) {
3637                if (ict.onEditorActionListener.onEditorAction(this,
3638                        actionCode, null)) {
3639                    return;
3640                }
3641            }
3642
3643            // This is the handling for some default action.
3644            // Note that for backwards compatibility we don't do this
3645            // default handling if explicit ime options have not been given,
3646            // instead turning this into the normal enter key codes that an
3647            // app may be expecting.
3648            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3649                View v = focusSearch(FOCUS_FORWARD);
3650                if (v != null) {
3651                    if (!v.requestFocus(FOCUS_FORWARD)) {
3652                        throw new IllegalStateException("focus search returned a view " +
3653                                "that wasn't able to take focus!");
3654                    }
3655                }
3656                return;
3657
3658            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3659                View v = focusSearch(FOCUS_BACKWARD);
3660                if (v != null) {
3661                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3662                        throw new IllegalStateException("focus search returned a view " +
3663                                "that wasn't able to take focus!");
3664                    }
3665                }
3666                return;
3667
3668            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3669                InputMethodManager imm = InputMethodManager.peekInstance();
3670                if (imm != null && imm.isActive(this)) {
3671                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3672                }
3673                return;
3674            }
3675        }
3676
3677        ViewRootImpl viewRootImpl = getViewRootImpl();
3678        if (viewRootImpl != null) {
3679            long eventTime = SystemClock.uptimeMillis();
3680            viewRootImpl.dispatchKeyFromIme(
3681                    new KeyEvent(eventTime, eventTime,
3682                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3683                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3684                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3685                    | KeyEvent.FLAG_EDITOR_ACTION));
3686            viewRootImpl.dispatchKeyFromIme(
3687                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3688                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3689                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3690                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3691                    | KeyEvent.FLAG_EDITOR_ACTION));
3692        }
3693    }
3694
3695    /**
3696     * Set the private content type of the text, which is the
3697     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3698     * field that will be filled in when creating an input connection.
3699     *
3700     * @see #getPrivateImeOptions()
3701     * @see EditorInfo#privateImeOptions
3702     * @attr ref android.R.styleable#TextView_privateImeOptions
3703     */
3704    public void setPrivateImeOptions(String type) {
3705        createEditorIfNeeded("Private IME option set");
3706        if (getEditor().mInputContentType == null)
3707            getEditor().mInputContentType = new InputContentType();
3708        getEditor().mInputContentType.privateImeOptions = type;
3709    }
3710
3711    /**
3712     * Get the private type of the content.
3713     *
3714     * @see #setPrivateImeOptions(String)
3715     * @see EditorInfo#privateImeOptions
3716     */
3717    public String getPrivateImeOptions() {
3718        return mEditor != null && getEditor().mInputContentType != null
3719                ? getEditor().mInputContentType.privateImeOptions : null;
3720    }
3721
3722    /**
3723     * Set the extra input data of the text, which is the
3724     * {@link EditorInfo#extras TextBoxAttribute.extras}
3725     * Bundle that will be filled in when creating an input connection.  The
3726     * given integer is the resource ID of an XML resource holding an
3727     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3728     *
3729     * @see #getInputExtras(boolean)
3730     * @see EditorInfo#extras
3731     * @attr ref android.R.styleable#TextView_editorExtras
3732     */
3733    public void setInputExtras(int xmlResId) throws XmlPullParserException, IOException {
3734        createEditorIfNeeded("Input extra set");
3735        XmlResourceParser parser = getResources().getXml(xmlResId);
3736        if (getEditor().mInputContentType == null)
3737            getEditor().mInputContentType = new InputContentType();
3738        getEditor().mInputContentType.extras = new Bundle();
3739        getResources().parseBundleExtras(parser, getEditor().mInputContentType.extras);
3740    }
3741
3742    /**
3743     * Retrieve the input extras currently associated with the text view, which
3744     * can be viewed as well as modified.
3745     *
3746     * @param create If true, the extras will be created if they don't already
3747     * exist.  Otherwise, null will be returned if none have been created.
3748     * @see #setInputExtras(int)
3749     * @see EditorInfo#extras
3750     * @attr ref android.R.styleable#TextView_editorExtras
3751     */
3752    public Bundle getInputExtras(boolean create) {
3753        if (mEditor == null && !create) return null;
3754        createEditorIfNeeded("get Input extra");
3755        if (getEditor().mInputContentType == null) {
3756            if (!create) return null;
3757            getEditor().mInputContentType = new InputContentType();
3758        }
3759        if (getEditor().mInputContentType.extras == null) {
3760            if (!create) return null;
3761            getEditor().mInputContentType.extras = new Bundle();
3762        }
3763        return getEditor().mInputContentType.extras;
3764    }
3765
3766    /**
3767     * Returns the error message that was set to be displayed with
3768     * {@link #setError}, or <code>null</code> if no error was set
3769     * or if it the error was cleared by the widget after user input.
3770     */
3771    public CharSequence getError() {
3772        return mEditor == null ? null : getEditor().mError;
3773    }
3774
3775    /**
3776     * Sets the right-hand compound drawable of the TextView to the "error"
3777     * icon and sets an error message that will be displayed in a popup when
3778     * the TextView has focus.  The icon and error message will be reset to
3779     * null when any key events cause changes to the TextView's text.  If the
3780     * <code>error</code> is <code>null</code>, the error message and icon
3781     * will be cleared.
3782     */
3783    @android.view.RemotableViewMethod
3784    public void setError(CharSequence error) {
3785        if (error == null) {
3786            setError(null, null);
3787        } else {
3788            Drawable dr = getContext().getResources().
3789                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3790
3791            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3792            setError(error, dr);
3793        }
3794    }
3795
3796    /**
3797     * Sets the right-hand compound drawable of the TextView to the specified
3798     * icon and sets an error message that will be displayed in a popup when
3799     * the TextView has focus.  The icon and error message will be reset to
3800     * null when any key events cause changes to the TextView's text.  The
3801     * drawable must already have had {@link Drawable#setBounds} set on it.
3802     * If the <code>error</code> is <code>null</code>, the error message will
3803     * be cleared (and you should provide a <code>null</code> icon as well).
3804     */
3805    public void setError(CharSequence error, Drawable icon) {
3806        createEditorIfNeeded("setError");
3807        error = TextUtils.stringOrSpannedString(error);
3808
3809        getEditor().mError = error;
3810        getEditor().mErrorWasChanged = true;
3811        final Drawables dr = mDrawables;
3812        if (dr != null) {
3813            switch (getResolvedLayoutDirection()) {
3814                default:
3815                case LAYOUT_DIRECTION_LTR:
3816                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3817                            dr.mDrawableBottom);
3818                    break;
3819                case LAYOUT_DIRECTION_RTL:
3820                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3821                            dr.mDrawableBottom);
3822                    break;
3823            }
3824        } else {
3825            setCompoundDrawables(null, null, icon, null);
3826        }
3827
3828        if (error == null) {
3829            if (getEditor().mErrorPopup != null) {
3830                if (getEditor().mErrorPopup.isShowing()) {
3831                    getEditor().mErrorPopup.dismiss();
3832                }
3833
3834                getEditor().mErrorPopup = null;
3835            }
3836        } else {
3837            if (isFocused()) {
3838                showError();
3839            }
3840        }
3841    }
3842
3843    private void showError() {
3844        if (getWindowToken() == null) {
3845            getEditor().mShowErrorAfterAttach = true;
3846            return;
3847        }
3848
3849        if (getEditor().mErrorPopup == null) {
3850            LayoutInflater inflater = LayoutInflater.from(getContext());
3851            final TextView err = (TextView) inflater.inflate(
3852                    com.android.internal.R.layout.textview_hint, null);
3853
3854            final float scale = getResources().getDisplayMetrics().density;
3855            getEditor().mErrorPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3856            getEditor().mErrorPopup.setFocusable(false);
3857            // The user is entering text, so the input method is needed.  We
3858            // don't want the popup to be displayed on top of it.
3859            getEditor().mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3860        }
3861
3862        TextView tv = (TextView) getEditor().mErrorPopup.getContentView();
3863        chooseSize(getEditor().mErrorPopup, getEditor().mError, tv);
3864        tv.setText(getEditor().mError);
3865
3866        getEditor().mErrorPopup.showAsDropDown(this, getErrorX(), getErrorY());
3867        getEditor().mErrorPopup.fixDirection(getEditor().mErrorPopup.isAboveAnchor());
3868    }
3869
3870    /**
3871     * Returns the Y offset to make the pointy top of the error point
3872     * at the middle of the error icon.
3873     */
3874    private int getErrorX() {
3875        /*
3876         * The "25" is the distance between the point and the right edge
3877         * of the background
3878         */
3879        final float scale = getResources().getDisplayMetrics().density;
3880
3881        final Drawables dr = mDrawables;
3882        return getWidth() - getEditor().mErrorPopup.getWidth() - getPaddingRight() -
3883                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3884    }
3885
3886    /**
3887     * Returns the Y offset to make the pointy top of the error point
3888     * at the bottom of the error icon.
3889     */
3890    private int getErrorY() {
3891        /*
3892         * Compound, not extended, because the icon is not clipped
3893         * if the text height is smaller.
3894         */
3895        final int compoundPaddingTop = getCompoundPaddingTop();
3896        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3897
3898        final Drawables dr = mDrawables;
3899        int icontop = compoundPaddingTop +
3900                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3901
3902        /*
3903         * The "2" is the distance between the point and the top edge
3904         * of the background.
3905         */
3906        final float scale = getResources().getDisplayMetrics().density;
3907        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
3908                (int) (2 * scale + 0.5f);
3909    }
3910
3911    private void hideError() {
3912        if (getEditor().mErrorPopup != null) {
3913            if (getEditor().mErrorPopup.isShowing()) {
3914                getEditor().mErrorPopup.dismiss();
3915            }
3916        }
3917
3918        getEditor().mShowErrorAfterAttach = false;
3919    }
3920
3921    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3922        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3923        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3924
3925        int defaultWidthInPixels = getResources().getDimensionPixelSize(
3926                com.android.internal.R.dimen.textview_error_popup_default_width);
3927        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
3928                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3929        float max = 0;
3930        for (int i = 0; i < l.getLineCount(); i++) {
3931            max = Math.max(max, l.getLineWidth(i));
3932        }
3933
3934        /*
3935         * Now set the popup size to be big enough for the text plus the border capped
3936         * to DEFAULT_MAX_POPUP_WIDTH
3937         */
3938        pop.setWidth(wid + (int) Math.ceil(max));
3939        pop.setHeight(ht + l.getHeight());
3940    }
3941
3942
3943    @Override
3944    protected boolean setFrame(int l, int t, int r, int b) {
3945        boolean result = super.setFrame(l, t, r, b);
3946
3947        if (mEditor != null) getEditor().setFrame();
3948
3949        restartMarqueeIfNeeded();
3950
3951        return result;
3952    }
3953
3954    private void restartMarqueeIfNeeded() {
3955        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3956            mRestartMarquee = false;
3957            startMarquee();
3958        }
3959    }
3960
3961    /**
3962     * Sets the list of input filters that will be used if the buffer is
3963     * Editable. Has no effect otherwise.
3964     *
3965     * @attr ref android.R.styleable#TextView_maxLength
3966     */
3967    public void setFilters(InputFilter[] filters) {
3968        if (filters == null) {
3969            throw new IllegalArgumentException();
3970        }
3971
3972        mFilters = filters;
3973
3974        if (mText instanceof Editable) {
3975            setFilters((Editable) mText, filters);
3976        }
3977    }
3978
3979    /**
3980     * Sets the list of input filters on the specified Editable,
3981     * and includes mInput in the list if it is an InputFilter.
3982     */
3983    private void setFilters(Editable e, InputFilter[] filters) {
3984        if (mEditor != null && getEditor().mKeyListener instanceof InputFilter) {
3985            InputFilter[] nf = new InputFilter[filters.length + 1];
3986
3987            System.arraycopy(filters, 0, nf, 0, filters.length);
3988            nf[filters.length] = (InputFilter) getEditor().mKeyListener;
3989
3990            e.setFilters(nf);
3991        } else {
3992            e.setFilters(filters);
3993        }
3994    }
3995
3996    /**
3997     * Returns the current list of input filters.
3998     */
3999    public InputFilter[] getFilters() {
4000        return mFilters;
4001    }
4002
4003    /////////////////////////////////////////////////////////////////////////
4004
4005    private int getVerticalOffset(boolean forceNormal) {
4006        int voffset = 0;
4007        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4008
4009        Layout l = mLayout;
4010        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4011            l = mHintLayout;
4012        }
4013
4014        if (gravity != Gravity.TOP) {
4015            int boxht;
4016
4017            if (l == mHintLayout) {
4018                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4019                        getCompoundPaddingBottom();
4020            } else {
4021                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4022                        getExtendedPaddingBottom();
4023            }
4024            int textht = l.getHeight();
4025
4026            if (textht < boxht) {
4027                if (gravity == Gravity.BOTTOM)
4028                    voffset = boxht - textht;
4029                else // (gravity == Gravity.CENTER_VERTICAL)
4030                    voffset = (boxht - textht) >> 1;
4031            }
4032        }
4033        return voffset;
4034    }
4035
4036    private int getBottomVerticalOffset(boolean forceNormal) {
4037        int voffset = 0;
4038        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4039
4040        Layout l = mLayout;
4041        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4042            l = mHintLayout;
4043        }
4044
4045        if (gravity != Gravity.BOTTOM) {
4046            int boxht;
4047
4048            if (l == mHintLayout) {
4049                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4050                        getCompoundPaddingBottom();
4051            } else {
4052                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4053                        getExtendedPaddingBottom();
4054            }
4055            int textht = l.getHeight();
4056
4057            if (textht < boxht) {
4058                if (gravity == Gravity.TOP)
4059                    voffset = boxht - textht;
4060                else // (gravity == Gravity.CENTER_VERTICAL)
4061                    voffset = (boxht - textht) >> 1;
4062            }
4063        }
4064        return voffset;
4065    }
4066
4067    private void invalidateCursorPath() {
4068        if (getEditor().mHighlightPathBogus) {
4069            invalidateCursor();
4070        } else {
4071            final int horizontalPadding = getCompoundPaddingLeft();
4072            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4073
4074            if (getEditor().mCursorCount == 0) {
4075                synchronized (TEMP_RECTF) {
4076                    /*
4077                     * The reason for this concern about the thickness of the
4078                     * cursor and doing the floor/ceil on the coordinates is that
4079                     * some EditTexts (notably textfields in the Browser) have
4080                     * anti-aliased text where not all the characters are
4081                     * necessarily at integer-multiple locations.  This should
4082                     * make sure the entire cursor gets invalidated instead of
4083                     * sometimes missing half a pixel.
4084                     */
4085                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4086                    if (thick < 1.0f) {
4087                        thick = 1.0f;
4088                    }
4089
4090                    thick /= 2.0f;
4091
4092                    getEditor().mHighlightPath.computeBounds(TEMP_RECTF, false);
4093
4094                    invalidate((int) FloatMath.floor(horizontalPadding + TEMP_RECTF.left - thick),
4095                            (int) FloatMath.floor(verticalPadding + TEMP_RECTF.top - thick),
4096                            (int) FloatMath.ceil(horizontalPadding + TEMP_RECTF.right + thick),
4097                            (int) FloatMath.ceil(verticalPadding + TEMP_RECTF.bottom + thick));
4098                }
4099            } else {
4100                for (int i = 0; i < getEditor().mCursorCount; i++) {
4101                    Rect bounds = getEditor().mCursorDrawable[i].getBounds();
4102                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4103                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4104                }
4105            }
4106        }
4107    }
4108
4109    private void invalidateCursor() {
4110        int where = getSelectionEnd();
4111
4112        invalidateCursor(where, where, where);
4113    }
4114
4115    private void invalidateCursor(int a, int b, int c) {
4116        if (a >= 0 || b >= 0 || c >= 0) {
4117            int start = Math.min(Math.min(a, b), c);
4118            int end = Math.max(Math.max(a, b), c);
4119            invalidateRegion(start, end, true /* Also invalidates blinking cursor */);
4120        }
4121    }
4122
4123    /**
4124     * Invalidates the region of text enclosed between the start and end text offsets.
4125     *
4126     * @hide
4127     */
4128    void invalidateRegion(int start, int end, boolean invalidateCursor) {
4129        if (mLayout == null) {
4130            invalidate();
4131        } else {
4132                int lineStart = mLayout.getLineForOffset(start);
4133                int top = mLayout.getLineTop(lineStart);
4134
4135                // This is ridiculous, but the descent from the line above
4136                // can hang down into the line we really want to redraw,
4137                // so we have to invalidate part of the line above to make
4138                // sure everything that needs to be redrawn really is.
4139                // (But not the whole line above, because that would cause
4140                // the same problem with the descenders on the line above it!)
4141                if (lineStart > 0) {
4142                    top -= mLayout.getLineDescent(lineStart - 1);
4143                }
4144
4145                int lineEnd;
4146
4147                if (start == end)
4148                    lineEnd = lineStart;
4149                else
4150                    lineEnd = mLayout.getLineForOffset(end);
4151
4152                int bottom = mLayout.getLineBottom(lineEnd);
4153
4154                if (invalidateCursor) {
4155                    for (int i = 0; i < getEditor().mCursorCount; i++) {
4156                        Rect bounds = getEditor().mCursorDrawable[i].getBounds();
4157                        top = Math.min(top, bounds.top);
4158                        bottom = Math.max(bottom, bounds.bottom);
4159                    }
4160                }
4161
4162                final int compoundPaddingLeft = getCompoundPaddingLeft();
4163                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4164
4165                int left, right;
4166                if (lineStart == lineEnd && !invalidateCursor) {
4167                    left = (int) mLayout.getPrimaryHorizontal(start);
4168                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4169                    left += compoundPaddingLeft;
4170                    right += compoundPaddingLeft;
4171                } else {
4172                    // Rectangle bounding box when the region spans several lines
4173                    left = compoundPaddingLeft;
4174                    right = getWidth() - getCompoundPaddingRight();
4175                }
4176
4177                invalidate(mScrollX + left, verticalPadding + top,
4178                        mScrollX + right, verticalPadding + bottom);
4179        }
4180    }
4181
4182    private void registerForPreDraw() {
4183        if (!mPreDrawRegistered) {
4184            getViewTreeObserver().addOnPreDrawListener(this);
4185            mPreDrawRegistered = true;
4186        }
4187    }
4188
4189    /**
4190     * {@inheritDoc}
4191     */
4192    public boolean onPreDraw() {
4193        if (mLayout == null) {
4194            assumeLayout();
4195        }
4196
4197        boolean changed = false;
4198
4199        if (mMovement != null) {
4200            /* This code also provides auto-scrolling when a cursor is moved using a
4201             * CursorController (insertion point or selection limits).
4202             * For selection, ensure start or end is visible depending on controller's state.
4203             */
4204            int curs = getSelectionEnd();
4205            // Do not create the controller if it is not already created.
4206            if (mEditor != null && getEditor().mSelectionModifierCursorController != null &&
4207                    getEditor().mSelectionModifierCursorController.isSelectionStartDragged()) {
4208                curs = getSelectionStart();
4209            }
4210
4211            /*
4212             * TODO: This should really only keep the end in view if
4213             * it already was before the text changed.  I'm not sure
4214             * of a good way to tell from here if it was.
4215             */
4216            if (curs < 0 && (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4217                curs = mText.length();
4218            }
4219
4220            if (curs >= 0) {
4221                changed = bringPointIntoView(curs);
4222            }
4223        } else {
4224            changed = bringTextIntoView();
4225        }
4226
4227        // This has to be checked here since:
4228        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4229        //   a screen rotation) since layout is not yet initialized at that point.
4230        if (mEditor != null && getEditor().mCreatedWithASelection) {
4231            startSelectionActionMode();
4232            getEditor().mCreatedWithASelection = false;
4233        }
4234
4235        // Phone specific code (there is no ExtractEditText on tablets).
4236        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4237        // not be set. Do the test here instead.
4238        if (this instanceof ExtractEditText && hasSelection()) {
4239            startSelectionActionMode();
4240        }
4241
4242        getViewTreeObserver().removeOnPreDrawListener(this);
4243        mPreDrawRegistered = false;
4244
4245        return !changed;
4246    }
4247
4248    @Override
4249    protected void onAttachedToWindow() {
4250        super.onAttachedToWindow();
4251
4252        mTemporaryDetach = false;
4253
4254        if (mEditor != null && getEditor().mShowErrorAfterAttach) {
4255            showError();
4256            getEditor().mShowErrorAfterAttach = false;
4257        }
4258
4259        // Resolve drawables as the layout direction has been resolved
4260        resolveDrawables();
4261
4262        if (mEditor != null) getEditor().onAttachedToWindow();
4263    }
4264
4265    @Override
4266    protected void onDetachedFromWindow() {
4267        super.onDetachedFromWindow();
4268
4269        if (mPreDrawRegistered) {
4270            getViewTreeObserver().removeOnPreDrawListener(this);
4271            mPreDrawRegistered = false;
4272        }
4273
4274        resetResolvedDrawables();
4275
4276        if (mEditor != null) getEditor().onDetachedFromWindow();
4277    }
4278
4279    @Override
4280    protected boolean isPaddingOffsetRequired() {
4281        return mShadowRadius != 0 || mDrawables != null;
4282    }
4283
4284    @Override
4285    protected int getLeftPaddingOffset() {
4286        return getCompoundPaddingLeft() - mPaddingLeft +
4287                (int) Math.min(0, mShadowDx - mShadowRadius);
4288    }
4289
4290    @Override
4291    protected int getTopPaddingOffset() {
4292        return (int) Math.min(0, mShadowDy - mShadowRadius);
4293    }
4294
4295    @Override
4296    protected int getBottomPaddingOffset() {
4297        return (int) Math.max(0, mShadowDy + mShadowRadius);
4298    }
4299
4300    @Override
4301    protected int getRightPaddingOffset() {
4302        return -(getCompoundPaddingRight() - mPaddingRight) +
4303                (int) Math.max(0, mShadowDx + mShadowRadius);
4304    }
4305
4306    @Override
4307    protected boolean verifyDrawable(Drawable who) {
4308        final boolean verified = super.verifyDrawable(who);
4309        if (!verified && mDrawables != null) {
4310            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4311                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4312                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4313        }
4314        return verified;
4315    }
4316
4317    @Override
4318    public void jumpDrawablesToCurrentState() {
4319        super.jumpDrawablesToCurrentState();
4320        if (mDrawables != null) {
4321            if (mDrawables.mDrawableLeft != null) {
4322                mDrawables.mDrawableLeft.jumpToCurrentState();
4323            }
4324            if (mDrawables.mDrawableTop != null) {
4325                mDrawables.mDrawableTop.jumpToCurrentState();
4326            }
4327            if (mDrawables.mDrawableRight != null) {
4328                mDrawables.mDrawableRight.jumpToCurrentState();
4329            }
4330            if (mDrawables.mDrawableBottom != null) {
4331                mDrawables.mDrawableBottom.jumpToCurrentState();
4332            }
4333            if (mDrawables.mDrawableStart != null) {
4334                mDrawables.mDrawableStart.jumpToCurrentState();
4335            }
4336            if (mDrawables.mDrawableEnd != null) {
4337                mDrawables.mDrawableEnd.jumpToCurrentState();
4338            }
4339        }
4340    }
4341
4342    @Override
4343    public void invalidateDrawable(Drawable drawable) {
4344        if (verifyDrawable(drawable)) {
4345            final Rect dirty = drawable.getBounds();
4346            int scrollX = mScrollX;
4347            int scrollY = mScrollY;
4348
4349            // IMPORTANT: The coordinates below are based on the coordinates computed
4350            // for each compound drawable in onDraw(). Make sure to update each section
4351            // accordingly.
4352            final TextView.Drawables drawables = mDrawables;
4353            if (drawables != null) {
4354                if (drawable == drawables.mDrawableLeft) {
4355                    final int compoundPaddingTop = getCompoundPaddingTop();
4356                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4357                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4358
4359                    scrollX += mPaddingLeft;
4360                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4361                } else if (drawable == drawables.mDrawableRight) {
4362                    final int compoundPaddingTop = getCompoundPaddingTop();
4363                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4364                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4365
4366                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4367                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4368                } else if (drawable == drawables.mDrawableTop) {
4369                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4370                    final int compoundPaddingRight = getCompoundPaddingRight();
4371                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4372
4373                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4374                    scrollY += mPaddingTop;
4375                } else if (drawable == drawables.mDrawableBottom) {
4376                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4377                    final int compoundPaddingRight = getCompoundPaddingRight();
4378                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4379
4380                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4381                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4382                }
4383            }
4384
4385            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4386                    dirty.right + scrollX, dirty.bottom + scrollY);
4387        }
4388    }
4389
4390    /**
4391     * @hide
4392     */
4393    @Override
4394    public int getResolvedLayoutDirection(Drawable who) {
4395        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4396        if (mDrawables != null) {
4397            final Drawables drawables = mDrawables;
4398            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4399                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4400                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4401                return getResolvedLayoutDirection();
4402            }
4403        }
4404        return super.getResolvedLayoutDirection(who);
4405    }
4406
4407    @Override
4408    protected boolean onSetAlpha(int alpha) {
4409        // Alpha is supported if and only if the drawing can be done in one pass.
4410        // TODO text with spans with a background color currently do not respect this alpha.
4411        if (getBackground() == null) {
4412            if (mCurrentAlpha != alpha) {
4413                mCurrentAlpha = alpha;
4414                final Drawables dr = mDrawables;
4415                if (dr != null) {
4416                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4417                    if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4418                    if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4419                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4420                    if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4421                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4422                }
4423                if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
4424            }
4425            return true;
4426        }
4427
4428        if (mCurrentAlpha != 255) {
4429            if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
4430        }
4431        mCurrentAlpha = 255;
4432        return false;
4433    }
4434
4435    /**
4436     * When a TextView is used to display a useful piece of information to the user (such as a
4437     * contact's address), it should be made selectable, so that the user can select and copy this
4438     * content.
4439     *
4440     * Use {@link #setTextIsSelectable(boolean)} or the
4441     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4442     * selectable (text is not selectable by default).
4443     *
4444     * Note that this method simply returns the state of this flag. Although this flag has to be set
4445     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4446     * always be selected, independently of the value of this flag.
4447     *
4448     * @return True if the text displayed in this TextView can be selected by the user.
4449     *
4450     * @attr ref android.R.styleable#TextView_textIsSelectable
4451     */
4452    public boolean isTextSelectable() {
4453        return mEditor == null ? false : getEditor().mTextIsSelectable;
4454    }
4455
4456    /**
4457     * Sets whether or not (default) the content of this view is selectable by the user.
4458     *
4459     * Note that this methods affect the {@link #setFocusable(boolean)},
4460     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4461     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4462     * customized.
4463     *
4464     * See {@link #isTextSelectable} for details.
4465     *
4466     * @param selectable Whether or not the content of this TextView should be selectable.
4467     */
4468    public void setTextIsSelectable(boolean selectable) {
4469        if (!selectable && mEditor == null) return; // false is default value with no edit data
4470
4471        createEditorIfNeeded("setTextIsSelectable");
4472        if (getEditor().mTextIsSelectable == selectable) return;
4473
4474        getEditor().mTextIsSelectable = selectable;
4475        setFocusableInTouchMode(selectable);
4476        setFocusable(selectable);
4477        setClickable(selectable);
4478        setLongClickable(selectable);
4479
4480        // mInputType should already be EditorInfo.TYPE_NULL and mInput should be null
4481
4482        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4483        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4484
4485        // Called by setText above, but safer in case of future code changes
4486        prepareCursorControllers();
4487    }
4488
4489    @Override
4490    protected int[] onCreateDrawableState(int extraSpace) {
4491        final int[] drawableState;
4492
4493        if (mSingleLine) {
4494            drawableState = super.onCreateDrawableState(extraSpace);
4495        } else {
4496            drawableState = super.onCreateDrawableState(extraSpace + 1);
4497            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4498        }
4499
4500        if (isTextSelectable()) {
4501            // Disable pressed state, which was introduced when TextView was made clickable.
4502            // Prevents text color change.
4503            // setClickable(false) would have a similar effect, but it also disables focus changes
4504            // and long press actions, which are both needed by text selection.
4505            final int length = drawableState.length;
4506            for (int i = 0; i < length; i++) {
4507                if (drawableState[i] == R.attr.state_pressed) {
4508                    final int[] nonPressedState = new int[length - 1];
4509                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4510                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4511                    return nonPressedState;
4512                }
4513            }
4514        }
4515
4516        return drawableState;
4517    }
4518
4519    @Override
4520    protected void onDraw(Canvas canvas) {
4521        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4522
4523        restartMarqueeIfNeeded();
4524
4525        // Draw the background for this view
4526        super.onDraw(canvas);
4527
4528        final int compoundPaddingLeft = getCompoundPaddingLeft();
4529        final int compoundPaddingTop = getCompoundPaddingTop();
4530        final int compoundPaddingRight = getCompoundPaddingRight();
4531        final int compoundPaddingBottom = getCompoundPaddingBottom();
4532        final int scrollX = mScrollX;
4533        final int scrollY = mScrollY;
4534        final int right = mRight;
4535        final int left = mLeft;
4536        final int bottom = mBottom;
4537        final int top = mTop;
4538
4539        final Drawables dr = mDrawables;
4540        if (dr != null) {
4541            /*
4542             * Compound, not extended, because the icon is not clipped
4543             * if the text height is smaller.
4544             */
4545
4546            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4547            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4548
4549            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4550            // Make sure to update invalidateDrawable() when changing this code.
4551            if (dr.mDrawableLeft != null) {
4552                canvas.save();
4553                canvas.translate(scrollX + mPaddingLeft,
4554                                 scrollY + compoundPaddingTop +
4555                                 (vspace - dr.mDrawableHeightLeft) / 2);
4556                dr.mDrawableLeft.draw(canvas);
4557                canvas.restore();
4558            }
4559
4560            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4561            // Make sure to update invalidateDrawable() when changing this code.
4562            if (dr.mDrawableRight != null) {
4563                canvas.save();
4564                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4565                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4566                dr.mDrawableRight.draw(canvas);
4567                canvas.restore();
4568            }
4569
4570            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4571            // Make sure to update invalidateDrawable() when changing this code.
4572            if (dr.mDrawableTop != null) {
4573                canvas.save();
4574                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4575                        scrollY + mPaddingTop);
4576                dr.mDrawableTop.draw(canvas);
4577                canvas.restore();
4578            }
4579
4580            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4581            // Make sure to update invalidateDrawable() when changing this code.
4582            if (dr.mDrawableBottom != null) {
4583                canvas.save();
4584                canvas.translate(scrollX + compoundPaddingLeft +
4585                        (hspace - dr.mDrawableWidthBottom) / 2,
4586                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4587                dr.mDrawableBottom.draw(canvas);
4588                canvas.restore();
4589            }
4590        }
4591
4592        int color = mCurTextColor;
4593
4594        if (mLayout == null) {
4595            assumeLayout();
4596        }
4597
4598        Layout layout = mLayout;
4599
4600        if (mHint != null && mText.length() == 0) {
4601            if (mHintTextColor != null) {
4602                color = mCurHintTextColor;
4603            }
4604
4605            layout = mHintLayout;
4606        }
4607
4608        mTextPaint.setColor(color);
4609        if (mCurrentAlpha != 255) {
4610            // If set, the alpha will override the color's alpha. Multiply the alphas.
4611            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4612        }
4613        mTextPaint.drawableState = getDrawableState();
4614
4615        canvas.save();
4616        /*  Would be faster if we didn't have to do this. Can we chop the
4617            (displayable) text so that we don't need to do this ever?
4618        */
4619
4620        int extendedPaddingTop = getExtendedPaddingTop();
4621        int extendedPaddingBottom = getExtendedPaddingBottom();
4622
4623        final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4624        final int maxScrollY = mLayout.getHeight() - vspace;
4625
4626        float clipLeft = compoundPaddingLeft + scrollX;
4627        float clipTop = (scrollY == 0) ? 0 : extendedPaddingTop + scrollY;
4628        float clipRight = right - left - compoundPaddingRight + scrollX;
4629        float clipBottom = bottom - top + scrollY -
4630                ((scrollY == maxScrollY) ? 0 : extendedPaddingBottom);
4631
4632        if (mShadowRadius != 0) {
4633            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4634            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4635
4636            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4637            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4638        }
4639
4640        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4641
4642        int voffsetText = 0;
4643        int voffsetCursor = 0;
4644
4645        // translate in by our padding
4646        /* shortcircuit calling getVerticaOffset() */
4647        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4648            voffsetText = getVerticalOffset(false);
4649            voffsetCursor = getVerticalOffset(true);
4650        }
4651        canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4652
4653        final int layoutDirection = getResolvedLayoutDirection();
4654        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4655        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4656                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4657            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4658                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4659                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4660                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4661            }
4662
4663            if (mMarquee != null && mMarquee.isRunning()) {
4664                canvas.translate(-mMarquee.mScroll, 0.0f);
4665            }
4666        }
4667
4668        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4669
4670        if (mEditor != null) {
4671            getEditor().onDraw(canvas, layout, cursorOffsetVertical);
4672        } else {
4673            layout.draw(canvas, null, null, cursorOffsetVertical);
4674
4675            if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4676                canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4677                layout.draw(canvas, null, null, cursorOffsetVertical);
4678            }
4679        }
4680
4681        canvas.restore();
4682    }
4683
4684    private void updateCursorsPositions() {
4685        if (mCursorDrawableRes == 0) {
4686            getEditor().mCursorCount = 0;
4687            return;
4688        }
4689
4690        final int offset = getSelectionStart();
4691        final int line = mLayout.getLineForOffset(offset);
4692        final int top = mLayout.getLineTop(line);
4693        final int bottom = mLayout.getLineTop(line + 1);
4694
4695        getEditor().mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4696
4697        int middle = bottom;
4698        if (getEditor().mCursorCount == 2) {
4699            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4700            middle = (top + bottom) >> 1;
4701        }
4702
4703        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4704
4705        if (getEditor().mCursorCount == 2) {
4706            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4707        }
4708    }
4709
4710    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4711        if (getEditor().mCursorDrawable[cursorIndex] == null)
4712            getEditor().mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4713
4714        if (mTempRect == null) mTempRect = new Rect();
4715        getEditor().mCursorDrawable[cursorIndex].getPadding(mTempRect);
4716        final int width = getEditor().mCursorDrawable[cursorIndex].getIntrinsicWidth();
4717        horizontal = Math.max(0.5f, horizontal - 0.5f);
4718        final int left = (int) (horizontal) - mTempRect.left;
4719        getEditor().mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4720                bottom + mTempRect.bottom);
4721    }
4722
4723    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4724        final boolean translate = cursorOffsetVertical != 0;
4725        if (translate) canvas.translate(0, cursorOffsetVertical);
4726        for (int i = 0; i < getEditor().mCursorCount; i++) {
4727            getEditor().mCursorDrawable[i].draw(canvas);
4728        }
4729        if (translate) canvas.translate(0, -cursorOffsetVertical);
4730    }
4731
4732    @Override
4733    public void getFocusedRect(Rect r) {
4734        if (mLayout == null) {
4735            super.getFocusedRect(r);
4736            return;
4737        }
4738
4739        int selEnd = getSelectionEnd();
4740        if (selEnd < 0) {
4741            super.getFocusedRect(r);
4742            return;
4743        }
4744
4745        int selStart = getSelectionStart();
4746        if (selStart < 0 || selStart >= selEnd) {
4747            int line = mLayout.getLineForOffset(selEnd);
4748            r.top = mLayout.getLineTop(line);
4749            r.bottom = mLayout.getLineBottom(line);
4750            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
4751            r.right = r.left + 4;
4752        } else {
4753            int lineStart = mLayout.getLineForOffset(selStart);
4754            int lineEnd = mLayout.getLineForOffset(selEnd);
4755            r.top = mLayout.getLineTop(lineStart);
4756            r.bottom = mLayout.getLineBottom(lineEnd);
4757            if (lineStart == lineEnd) {
4758                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
4759                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
4760            } else {
4761                // Selection extends across multiple lines -- make the focused
4762                // rect cover the entire width.
4763                if (mEditor != null) {
4764                    if (getEditor().mHighlightPath == null) getEditor().mHighlightPath = new Path();
4765                    if (getEditor().mHighlightPathBogus) {
4766                        getEditor().mHighlightPath.reset();
4767                        mLayout.getSelectionPath(selStart, selEnd, getEditor().mHighlightPath);
4768                        getEditor().mHighlightPathBogus = false;
4769                    }
4770                    synchronized (TEMP_RECTF) {
4771                        getEditor().mHighlightPath.computeBounds(TEMP_RECTF, true);
4772                        r.left = (int)TEMP_RECTF.left-1;
4773                        r.right = (int)TEMP_RECTF.right+1;
4774                    }
4775                } else {
4776                    r.left = 0;
4777                    r.right = getMeasuredWidth();
4778                }
4779            }
4780        }
4781
4782        // Adjust for padding and gravity.
4783        int paddingLeft = getCompoundPaddingLeft();
4784        int paddingTop = getExtendedPaddingTop();
4785        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4786            paddingTop += getVerticalOffset(false);
4787        }
4788        r.offset(paddingLeft, paddingTop);
4789        int paddingBottom = getExtendedPaddingBottom();
4790        r.bottom += paddingBottom;
4791    }
4792
4793    /**
4794     * Return the number of lines of text, or 0 if the internal Layout has not
4795     * been built.
4796     */
4797    public int getLineCount() {
4798        return mLayout != null ? mLayout.getLineCount() : 0;
4799    }
4800
4801    /**
4802     * Return the baseline for the specified line (0...getLineCount() - 1)
4803     * If bounds is not null, return the top, left, right, bottom extents
4804     * of the specified line in it. If the internal Layout has not been built,
4805     * return 0 and set bounds to (0, 0, 0, 0)
4806     * @param line which line to examine (0..getLineCount() - 1)
4807     * @param bounds Optional. If not null, it returns the extent of the line
4808     * @return the Y-coordinate of the baseline
4809     */
4810    public int getLineBounds(int line, Rect bounds) {
4811        if (mLayout == null) {
4812            if (bounds != null) {
4813                bounds.set(0, 0, 0, 0);
4814            }
4815            return 0;
4816        }
4817        else {
4818            int baseline = mLayout.getLineBounds(line, bounds);
4819
4820            int voffset = getExtendedPaddingTop();
4821            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4822                voffset += getVerticalOffset(true);
4823            }
4824            if (bounds != null) {
4825                bounds.offset(getCompoundPaddingLeft(), voffset);
4826            }
4827            return baseline + voffset;
4828        }
4829    }
4830
4831    @Override
4832    public int getBaseline() {
4833        if (mLayout == null) {
4834            return super.getBaseline();
4835        }
4836
4837        int voffset = 0;
4838        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4839            voffset = getVerticalOffset(true);
4840        }
4841
4842        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4843    }
4844
4845    /**
4846     * @hide
4847     * @param offsetRequired
4848     */
4849    @Override
4850    protected int getFadeTop(boolean offsetRequired) {
4851        if (mLayout == null) return 0;
4852
4853        int voffset = 0;
4854        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4855            voffset = getVerticalOffset(true);
4856        }
4857
4858        if (offsetRequired) voffset += getTopPaddingOffset();
4859
4860        return getExtendedPaddingTop() + voffset;
4861    }
4862
4863    /**
4864     * @hide
4865     * @param offsetRequired
4866     */
4867    @Override
4868    protected int getFadeHeight(boolean offsetRequired) {
4869        return mLayout != null ? mLayout.getHeight() : 0;
4870    }
4871
4872    @Override
4873    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
4874        if (keyCode == KeyEvent.KEYCODE_BACK) {
4875            boolean isInSelectionMode = mEditor != null && getEditor().mSelectionActionMode != null;
4876
4877            if (isInSelectionMode) {
4878                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
4879                    KeyEvent.DispatcherState state = getKeyDispatcherState();
4880                    if (state != null) {
4881                        state.startTracking(event, this);
4882                    }
4883                    return true;
4884                } else if (event.getAction() == KeyEvent.ACTION_UP) {
4885                    KeyEvent.DispatcherState state = getKeyDispatcherState();
4886                    if (state != null) {
4887                        state.handleUpEvent(event);
4888                    }
4889                    if (event.isTracking() && !event.isCanceled()) {
4890                        stopSelectionActionMode();
4891                        return true;
4892                    }
4893                }
4894            }
4895        }
4896        return super.onKeyPreIme(keyCode, event);
4897    }
4898
4899    @Override
4900    public boolean onKeyDown(int keyCode, KeyEvent event) {
4901        int which = doKeyDown(keyCode, event, null);
4902        if (which == 0) {
4903            // Go through default dispatching.
4904            return super.onKeyDown(keyCode, event);
4905        }
4906
4907        return true;
4908    }
4909
4910    @Override
4911    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4912        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4913
4914        int which = doKeyDown(keyCode, down, event);
4915        if (which == 0) {
4916            // Go through default dispatching.
4917            return super.onKeyMultiple(keyCode, repeatCount, event);
4918        }
4919        if (which == -1) {
4920            // Consumed the whole thing.
4921            return true;
4922        }
4923
4924        repeatCount--;
4925
4926        // We are going to dispatch the remaining events to either the input
4927        // or movement method.  To do this, we will just send a repeated stream
4928        // of down and up events until we have done the complete repeatCount.
4929        // It would be nice if those interfaces had an onKeyMultiple() method,
4930        // but adding that is a more complicated change.
4931        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4932        if (which == 1) {
4933            // mEditor and getEditor().mInput are not null from doKeyDown
4934            getEditor().mKeyListener.onKeyUp(this, (Editable)mText, keyCode, up);
4935            while (--repeatCount > 0) {
4936                getEditor().mKeyListener.onKeyDown(this, (Editable)mText, keyCode, down);
4937                getEditor().mKeyListener.onKeyUp(this, (Editable)mText, keyCode, up);
4938            }
4939            hideErrorIfUnchanged();
4940
4941        } else if (which == 2) {
4942            // mMovement is not null from doKeyDown
4943            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4944            while (--repeatCount > 0) {
4945                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4946                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4947            }
4948        }
4949
4950        return true;
4951    }
4952
4953    /**
4954     * Returns true if pressing ENTER in this field advances focus instead
4955     * of inserting the character.  This is true mostly in single-line fields,
4956     * but also in mail addresses and subjects which will display on multiple
4957     * lines but where it doesn't make sense to insert newlines.
4958     */
4959    private boolean shouldAdvanceFocusOnEnter() {
4960        if (getKeyListener() == null) {
4961            return false;
4962        }
4963
4964        if (mSingleLine) {
4965            return true;
4966        }
4967
4968        if (mEditor != null && (getEditor().mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4969            int variation = getEditor().mInputType & EditorInfo.TYPE_MASK_VARIATION;
4970            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4971                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4972                return true;
4973            }
4974        }
4975
4976        return false;
4977    }
4978
4979    /**
4980     * Returns true if pressing TAB in this field advances focus instead
4981     * of inserting the character.  Insert tabs only in multi-line editors.
4982     */
4983    private boolean shouldAdvanceFocusOnTab() {
4984        if (getKeyListener() != null && !mSingleLine) {
4985            if (mEditor != null && (getEditor().mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4986                int variation = getEditor().mInputType & EditorInfo.TYPE_MASK_VARIATION;
4987                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4988                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4989                    return false;
4990                }
4991            }
4992        }
4993        return true;
4994    }
4995
4996    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4997        if (!isEnabled()) {
4998            return 0;
4999        }
5000
5001        switch (keyCode) {
5002            case KeyEvent.KEYCODE_ENTER:
5003                if (event.hasNoModifiers()) {
5004                    // When mInputContentType is set, we know that we are
5005                    // running in a "modern" cupcake environment, so don't need
5006                    // to worry about the application trying to capture
5007                    // enter key events.
5008                    if (mEditor != null && getEditor().mInputContentType != null) {
5009                        // If there is an action listener, given them a
5010                        // chance to consume the event.
5011                        if (getEditor().mInputContentType.onEditorActionListener != null &&
5012                                getEditor().mInputContentType.onEditorActionListener.onEditorAction(
5013                                this, EditorInfo.IME_NULL, event)) {
5014                            getEditor().mInputContentType.enterDown = true;
5015                            // We are consuming the enter key for them.
5016                            return -1;
5017                        }
5018                    }
5019
5020                    // If our editor should move focus when enter is pressed, or
5021                    // this is a generated event from an IME action button, then
5022                    // don't let it be inserted into the text.
5023                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5024                            || shouldAdvanceFocusOnEnter()) {
5025                        if (hasOnClickListeners()) {
5026                            return 0;
5027                        }
5028                        return -1;
5029                    }
5030                }
5031                break;
5032
5033            case KeyEvent.KEYCODE_DPAD_CENTER:
5034                if (event.hasNoModifiers()) {
5035                    if (shouldAdvanceFocusOnEnter()) {
5036                        return 0;
5037                    }
5038                }
5039                break;
5040
5041            case KeyEvent.KEYCODE_TAB:
5042                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5043                    if (shouldAdvanceFocusOnTab()) {
5044                        return 0;
5045                    }
5046                }
5047                break;
5048
5049                // Has to be done on key down (and not on key up) to correctly be intercepted.
5050            case KeyEvent.KEYCODE_BACK:
5051                if (mEditor != null && getEditor().mSelectionActionMode != null) {
5052                    stopSelectionActionMode();
5053                    return -1;
5054                }
5055                break;
5056        }
5057
5058        if (mEditor != null && getEditor().mKeyListener != null) {
5059            resetErrorChangedFlag();
5060
5061            boolean doDown = true;
5062            if (otherEvent != null) {
5063                try {
5064                    beginBatchEdit();
5065                    final boolean handled = getEditor().mKeyListener.onKeyOther(this, (Editable) mText, otherEvent);
5066                    hideErrorIfUnchanged();
5067                    doDown = false;
5068                    if (handled) {
5069                        return -1;
5070                    }
5071                } catch (AbstractMethodError e) {
5072                    // onKeyOther was added after 1.0, so if it isn't
5073                    // implemented we need to try to dispatch as a regular down.
5074                } finally {
5075                    endBatchEdit();
5076                }
5077            }
5078
5079            if (doDown) {
5080                beginBatchEdit();
5081                final boolean handled = getEditor().mKeyListener.onKeyDown(this, (Editable) mText, keyCode, event);
5082                endBatchEdit();
5083                hideErrorIfUnchanged();
5084                if (handled) return 1;
5085            }
5086        }
5087
5088        // bug 650865: sometimes we get a key event before a layout.
5089        // don't try to move around if we don't know the layout.
5090
5091        if (mMovement != null && mLayout != null) {
5092            boolean doDown = true;
5093            if (otherEvent != null) {
5094                try {
5095                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5096                            otherEvent);
5097                    doDown = false;
5098                    if (handled) {
5099                        return -1;
5100                    }
5101                } catch (AbstractMethodError e) {
5102                    // onKeyOther was added after 1.0, so if it isn't
5103                    // implemented we need to try to dispatch as a regular down.
5104                }
5105            }
5106            if (doDown) {
5107                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5108                    return 2;
5109            }
5110        }
5111
5112        return 0;
5113    }
5114
5115    /**
5116     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5117     * can be recorded.
5118     * @hide
5119     */
5120    public void resetErrorChangedFlag() {
5121        /*
5122         * Keep track of what the error was before doing the input
5123         * so that if an input filter changed the error, we leave
5124         * that error showing.  Otherwise, we take down whatever
5125         * error was showing when the user types something.
5126         */
5127        if (mEditor != null) getEditor().mErrorWasChanged = false;
5128    }
5129
5130    /**
5131     * @hide
5132     */
5133    public void hideErrorIfUnchanged() {
5134        if (mEditor != null && getEditor().mError != null && !getEditor().mErrorWasChanged) {
5135            setError(null, null);
5136        }
5137    }
5138
5139    @Override
5140    public boolean onKeyUp(int keyCode, KeyEvent event) {
5141        if (!isEnabled()) {
5142            return super.onKeyUp(keyCode, event);
5143        }
5144
5145        switch (keyCode) {
5146            case KeyEvent.KEYCODE_DPAD_CENTER:
5147                if (event.hasNoModifiers()) {
5148                    /*
5149                     * If there is a click listener, just call through to
5150                     * super, which will invoke it.
5151                     *
5152                     * If there isn't a click listener, try to show the soft
5153                     * input method.  (It will also
5154                     * call performClick(), but that won't do anything in
5155                     * this case.)
5156                     */
5157                    if (!hasOnClickListeners()) {
5158                        if (mMovement != null && mText instanceof Editable
5159                                && mLayout != null && onCheckIsTextEditor()) {
5160                            InputMethodManager imm = InputMethodManager.peekInstance();
5161                            viewClicked(imm);
5162                            if (imm != null) {
5163                                imm.showSoftInput(this, 0);
5164                            }
5165                        }
5166                    }
5167                }
5168                return super.onKeyUp(keyCode, event);
5169
5170            case KeyEvent.KEYCODE_ENTER:
5171                if (event.hasNoModifiers()) {
5172                    if (mEditor != null && getEditor().mInputContentType != null
5173                            && getEditor().mInputContentType.onEditorActionListener != null
5174                            && getEditor().mInputContentType.enterDown) {
5175                        getEditor().mInputContentType.enterDown = false;
5176                        if (getEditor().mInputContentType.onEditorActionListener.onEditorAction(
5177                                this, EditorInfo.IME_NULL, event)) {
5178                            return true;
5179                        }
5180                    }
5181
5182                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5183                            || shouldAdvanceFocusOnEnter()) {
5184                        /*
5185                         * If there is a click listener, just call through to
5186                         * super, which will invoke it.
5187                         *
5188                         * If there isn't a click listener, try to advance focus,
5189                         * but still call through to super, which will reset the
5190                         * pressed state and longpress state.  (It will also
5191                         * call performClick(), but that won't do anything in
5192                         * this case.)
5193                         */
5194                        if (!hasOnClickListeners()) {
5195                            View v = focusSearch(FOCUS_DOWN);
5196
5197                            if (v != null) {
5198                                if (!v.requestFocus(FOCUS_DOWN)) {
5199                                    throw new IllegalStateException(
5200                                            "focus search returned a view " +
5201                                            "that wasn't able to take focus!");
5202                                }
5203
5204                                /*
5205                                 * Return true because we handled the key; super
5206                                 * will return false because there was no click
5207                                 * listener.
5208                                 */
5209                                super.onKeyUp(keyCode, event);
5210                                return true;
5211                            } else if ((event.getFlags()
5212                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5213                                // No target for next focus, but make sure the IME
5214                                // if this came from it.
5215                                InputMethodManager imm = InputMethodManager.peekInstance();
5216                                if (imm != null && imm.isActive(this)) {
5217                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5218                                }
5219                            }
5220                        }
5221                    }
5222                    return super.onKeyUp(keyCode, event);
5223                }
5224                break;
5225        }
5226
5227        if (mEditor != null && getEditor().mKeyListener != null)
5228            if (getEditor().mKeyListener.onKeyUp(this, (Editable) mText, keyCode, event))
5229                return true;
5230
5231        if (mMovement != null && mLayout != null)
5232            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5233                return true;
5234
5235        return super.onKeyUp(keyCode, event);
5236    }
5237
5238    @Override
5239    public boolean onCheckIsTextEditor() {
5240        return mEditor != null && getEditor().mInputType != EditorInfo.TYPE_NULL;
5241    }
5242
5243    @Override
5244    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5245        createEditorIfNeeded("onCreateInputConnection");
5246        if (onCheckIsTextEditor() && isEnabled()) {
5247            if (getEditor().mInputMethodState == null) {
5248                getEditor().mInputMethodState = new InputMethodState();
5249            }
5250            outAttrs.inputType = getInputType();
5251            if (getEditor().mInputContentType != null) {
5252                outAttrs.imeOptions = getEditor().mInputContentType.imeOptions;
5253                outAttrs.privateImeOptions = getEditor().mInputContentType.privateImeOptions;
5254                outAttrs.actionLabel = getEditor().mInputContentType.imeActionLabel;
5255                outAttrs.actionId = getEditor().mInputContentType.imeActionId;
5256                outAttrs.extras = getEditor().mInputContentType.extras;
5257            } else {
5258                outAttrs.imeOptions = EditorInfo.IME_NULL;
5259            }
5260            if (focusSearch(FOCUS_DOWN) != null) {
5261                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5262            }
5263            if (focusSearch(FOCUS_UP) != null) {
5264                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5265            }
5266            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5267                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5268                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5269                    // An action has not been set, but the enter key will move to
5270                    // the next focus, so set the action to that.
5271                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5272                } else {
5273                    // An action has not been set, and there is no focus to move
5274                    // to, so let's just supply a "done" action.
5275                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5276                }
5277                if (!shouldAdvanceFocusOnEnter()) {
5278                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5279                }
5280            }
5281            if (isMultilineInputType(outAttrs.inputType)) {
5282                // Multi-line text editors should always show an enter key.
5283                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5284            }
5285            outAttrs.hintText = mHint;
5286            if (mText instanceof Editable) {
5287                InputConnection ic = new EditableInputConnection(this);
5288                outAttrs.initialSelStart = getSelectionStart();
5289                outAttrs.initialSelEnd = getSelectionEnd();
5290                outAttrs.initialCapsMode = ic.getCursorCapsMode(getInputType());
5291                return ic;
5292            }
5293        }
5294        return null;
5295    }
5296
5297    /**
5298     * If this TextView contains editable content, extract a portion of it
5299     * based on the information in <var>request</var> in to <var>outText</var>.
5300     * @return Returns true if the text was successfully extracted, else false.
5301     */
5302    public boolean extractText(ExtractedTextRequest request,
5303            ExtractedText outText) {
5304        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5305                EXTRACT_UNKNOWN, outText);
5306    }
5307
5308    static final int EXTRACT_NOTHING = -2;
5309    static final int EXTRACT_UNKNOWN = -1;
5310
5311    boolean extractTextInternal(ExtractedTextRequest request,
5312            int partialStartOffset, int partialEndOffset, int delta,
5313            ExtractedText outText) {
5314        final CharSequence content = mText;
5315        if (content != null) {
5316            if (partialStartOffset != EXTRACT_NOTHING) {
5317                final int N = content.length();
5318                if (partialStartOffset < 0) {
5319                    outText.partialStartOffset = outText.partialEndOffset = -1;
5320                    partialStartOffset = 0;
5321                    partialEndOffset = N;
5322                } else {
5323                    // Now use the delta to determine the actual amount of text
5324                    // we need.
5325                    partialEndOffset += delta;
5326                    // Adjust offsets to ensure we contain full spans.
5327                    if (content instanceof Spanned) {
5328                        Spanned spanned = (Spanned)content;
5329                        Object[] spans = spanned.getSpans(partialStartOffset,
5330                                partialEndOffset, ParcelableSpan.class);
5331                        int i = spans.length;
5332                        while (i > 0) {
5333                            i--;
5334                            int j = spanned.getSpanStart(spans[i]);
5335                            if (j < partialStartOffset) partialStartOffset = j;
5336                            j = spanned.getSpanEnd(spans[i]);
5337                            if (j > partialEndOffset) partialEndOffset = j;
5338                        }
5339                    }
5340                    outText.partialStartOffset = partialStartOffset;
5341                    outText.partialEndOffset = partialEndOffset - delta;
5342
5343                    if (partialStartOffset > N) {
5344                        partialStartOffset = N;
5345                    } else if (partialStartOffset < 0) {
5346                        partialStartOffset = 0;
5347                    }
5348                    if (partialEndOffset > N) {
5349                        partialEndOffset = N;
5350                    } else if (partialEndOffset < 0) {
5351                        partialEndOffset = 0;
5352                    }
5353                }
5354                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5355                    outText.text = content.subSequence(partialStartOffset,
5356                            partialEndOffset);
5357                } else {
5358                    outText.text = TextUtils.substring(content, partialStartOffset,
5359                            partialEndOffset);
5360                }
5361            } else {
5362                outText.partialStartOffset = 0;
5363                outText.partialEndOffset = 0;
5364                outText.text = "";
5365            }
5366            outText.flags = 0;
5367            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5368                outText.flags |= ExtractedText.FLAG_SELECTING;
5369            }
5370            if (mSingleLine) {
5371                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5372            }
5373            outText.startOffset = 0;
5374            outText.selectionStart = getSelectionStart();
5375            outText.selectionEnd = getSelectionEnd();
5376            return true;
5377        }
5378        return false;
5379    }
5380
5381    boolean reportExtractedText() {
5382        final InputMethodState ims = getEditor().mInputMethodState;
5383        if (ims != null) {
5384            final boolean contentChanged = ims.mContentChanged;
5385            if (contentChanged || ims.mSelectionModeChanged) {
5386                ims.mContentChanged = false;
5387                ims.mSelectionModeChanged = false;
5388                final ExtractedTextRequest req = ims.mExtracting;
5389                if (req != null) {
5390                    InputMethodManager imm = InputMethodManager.peekInstance();
5391                    if (imm != null) {
5392                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5393                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5394                                + " delta=" + ims.mChangedDelta);
5395                        if (ims.mChangedStart < 0 && !contentChanged) {
5396                            ims.mChangedStart = EXTRACT_NOTHING;
5397                        }
5398                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5399                                ims.mChangedDelta, ims.mTmpExtracted)) {
5400                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5401                                    + ims.mTmpExtracted.partialStartOffset
5402                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5403                                    + ": " + ims.mTmpExtracted.text);
5404                            imm.updateExtractedText(this, req.token, ims.mTmpExtracted);
5405                            ims.mChangedStart = EXTRACT_UNKNOWN;
5406                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5407                            ims.mChangedDelta = 0;
5408                            ims.mContentChanged = false;
5409                            return true;
5410                        }
5411                    }
5412                }
5413            }
5414        }
5415        return false;
5416    }
5417
5418    /**
5419     * This is used to remove all style-impacting spans from text before new
5420     * extracted text is being replaced into it, so that we don't have any
5421     * lingering spans applied during the replace.
5422     */
5423    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5424        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5425        int i = spans.length;
5426        while (i > 0) {
5427            i--;
5428            spannable.removeSpan(spans[i]);
5429        }
5430    }
5431
5432    /**
5433     * Apply to this text view the given extracted text, as previously
5434     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5435     */
5436    public void setExtractedText(ExtractedText text) {
5437        Editable content = getEditableText();
5438        if (text.text != null) {
5439            if (content == null) {
5440                setText(text.text, TextView.BufferType.EDITABLE);
5441            } else if (text.partialStartOffset < 0) {
5442                removeParcelableSpans(content, 0, content.length());
5443                content.replace(0, content.length(), text.text);
5444            } else {
5445                final int N = content.length();
5446                int start = text.partialStartOffset;
5447                if (start > N) start = N;
5448                int end = text.partialEndOffset;
5449                if (end > N) end = N;
5450                removeParcelableSpans(content, start, end);
5451                content.replace(start, end, text.text);
5452            }
5453        }
5454
5455        // Now set the selection position...  make sure it is in range, to
5456        // avoid crashes.  If this is a partial update, it is possible that
5457        // the underlying text may have changed, causing us problems here.
5458        // Also we just don't want to trust clients to do the right thing.
5459        Spannable sp = (Spannable)getText();
5460        final int N = sp.length();
5461        int start = text.selectionStart;
5462        if (start < 0) start = 0;
5463        else if (start > N) start = N;
5464        int end = text.selectionEnd;
5465        if (end < 0) end = 0;
5466        else if (end > N) end = N;
5467        Selection.setSelection(sp, start, end);
5468
5469        // Finally, update the selection mode.
5470        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5471            MetaKeyKeyListener.startSelecting(this, sp);
5472        } else {
5473            MetaKeyKeyListener.stopSelecting(this, sp);
5474        }
5475    }
5476
5477    /**
5478     * @hide
5479     */
5480    public void setExtracting(ExtractedTextRequest req) {
5481        if (getEditor().mInputMethodState != null) {
5482            getEditor().mInputMethodState.mExtracting = req;
5483        }
5484        // This would stop a possible selection mode, but no such mode is started in case
5485        // extracted mode will start. Some text is selected though, and will trigger an action mode
5486        // in the extracted view.
5487        hideControllers();
5488    }
5489
5490    /**
5491     * Called by the framework in response to a text completion from
5492     * the current input method, provided by it calling
5493     * {@link InputConnection#commitCompletion
5494     * InputConnection.commitCompletion()}.  The default implementation does
5495     * nothing; text views that are supporting auto-completion should override
5496     * this to do their desired behavior.
5497     *
5498     * @param text The auto complete text the user has selected.
5499     */
5500    public void onCommitCompletion(CompletionInfo text) {
5501        // intentionally empty
5502    }
5503
5504    /**
5505     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5506     * a dictionnary) from the current input method, provided by it calling
5507     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5508     * implementation flashes the background of the corrected word to provide feedback to the user.
5509     *
5510     * @param info The auto correct info about the text that was corrected.
5511     */
5512    public void onCommitCorrection(CorrectionInfo info) {
5513        if (mEditor == null) return;
5514        if (getEditor().mCorrectionHighlighter == null) {
5515            getEditor().mCorrectionHighlighter = new CorrectionHighlighter();
5516        } else {
5517            getEditor().mCorrectionHighlighter.invalidate(false);
5518        }
5519
5520        getEditor().mCorrectionHighlighter.highlight(info);
5521    }
5522
5523    public void beginBatchEdit() {
5524        if (mEditor == null) return;
5525        getEditor().mInBatchEditControllers = true;
5526        final InputMethodState ims = getEditor().mInputMethodState;
5527        if (ims != null) {
5528            int nesting = ++ims.mBatchEditNesting;
5529            if (nesting == 1) {
5530                ims.mCursorChanged = false;
5531                ims.mChangedDelta = 0;
5532                if (ims.mContentChanged) {
5533                    // We already have a pending change from somewhere else,
5534                    // so turn this into a full update.
5535                    ims.mChangedStart = 0;
5536                    ims.mChangedEnd = mText.length();
5537                } else {
5538                    ims.mChangedStart = EXTRACT_UNKNOWN;
5539                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5540                    ims.mContentChanged = false;
5541                }
5542                onBeginBatchEdit();
5543            }
5544        }
5545    }
5546
5547    public void endBatchEdit() {
5548        if (mEditor == null) return;
5549        getEditor().mInBatchEditControllers = false;
5550        final InputMethodState ims = getEditor().mInputMethodState;
5551        if (ims != null) {
5552            int nesting = --ims.mBatchEditNesting;
5553            if (nesting == 0) {
5554                finishBatchEdit(ims);
5555            }
5556        }
5557    }
5558
5559    void ensureEndedBatchEdit() {
5560        final InputMethodState ims = getEditor().mInputMethodState;
5561        if (ims != null && ims.mBatchEditNesting != 0) {
5562            ims.mBatchEditNesting = 0;
5563            finishBatchEdit(ims);
5564        }
5565    }
5566
5567    void finishBatchEdit(final InputMethodState ims) {
5568        onEndBatchEdit();
5569
5570        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5571            updateAfterEdit();
5572            reportExtractedText();
5573        } else if (ims.mCursorChanged) {
5574            // Cheezy way to get us to report the current cursor location.
5575            invalidateCursor();
5576        }
5577    }
5578
5579    void updateAfterEdit() {
5580        invalidate();
5581        int curs = getSelectionStart();
5582
5583        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5584            registerForPreDraw();
5585        }
5586
5587        if (curs >= 0) {
5588            getEditor().mHighlightPathBogus = true;
5589            makeBlink();
5590            bringPointIntoView(curs);
5591        }
5592
5593        checkForResize();
5594    }
5595
5596    /**
5597     * Called by the framework in response to a request to begin a batch
5598     * of edit operations through a call to link {@link #beginBatchEdit()}.
5599     */
5600    public void onBeginBatchEdit() {
5601        // intentionally empty
5602    }
5603
5604    /**
5605     * Called by the framework in response to a request to end a batch
5606     * of edit operations through a call to link {@link #endBatchEdit}.
5607     */
5608    public void onEndBatchEdit() {
5609        // intentionally empty
5610    }
5611
5612    /**
5613     * Called by the framework in response to a private command from the
5614     * current method, provided by it calling
5615     * {@link InputConnection#performPrivateCommand
5616     * InputConnection.performPrivateCommand()}.
5617     *
5618     * @param action The action name of the command.
5619     * @param data Any additional data for the command.  This may be null.
5620     * @return Return true if you handled the command, else false.
5621     */
5622    public boolean onPrivateIMECommand(String action, Bundle data) {
5623        return false;
5624    }
5625
5626    private void nullLayouts() {
5627        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5628            mSavedLayout = (BoringLayout) mLayout;
5629        }
5630        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5631            mSavedHintLayout = (BoringLayout) mHintLayout;
5632        }
5633
5634        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
5635
5636        mBoring = mHintBoring = null;
5637
5638        // Since it depends on the value of mLayout
5639        prepareCursorControllers();
5640    }
5641
5642    /**
5643     * Make a new Layout based on the already-measured size of the view,
5644     * on the assumption that it was measured correctly at some point.
5645     */
5646    private void assumeLayout() {
5647        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5648
5649        if (width < 1) {
5650            width = 0;
5651        }
5652
5653        int physicalWidth = width;
5654
5655        if (mHorizontallyScrolling) {
5656            width = VERY_WIDE;
5657        }
5658
5659        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5660                      physicalWidth, false);
5661    }
5662
5663    @Override
5664    protected void resetResolvedLayoutDirection() {
5665        super.resetResolvedLayoutDirection();
5666
5667        if (mLayoutAlignment != null &&
5668                (mTextAlign == TEXT_ALIGN.VIEW_START ||
5669                mTextAlign == TEXT_ALIGN.VIEW_END)) {
5670            mLayoutAlignment = null;
5671        }
5672    }
5673
5674    private Layout.Alignment getLayoutAlignment() {
5675        if (mLayoutAlignment == null) {
5676            Layout.Alignment alignment;
5677            TEXT_ALIGN textAlign = mTextAlign;
5678            switch (textAlign) {
5679                case INHERIT:
5680                    // fall through to gravity temporarily
5681                    // intention is to inherit value through view hierarchy.
5682                case GRAVITY:
5683                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
5684                        case Gravity.START:
5685                            alignment = Layout.Alignment.ALIGN_NORMAL;
5686                            break;
5687                        case Gravity.END:
5688                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
5689                            break;
5690                        case Gravity.LEFT:
5691                            alignment = Layout.Alignment.ALIGN_LEFT;
5692                            break;
5693                        case Gravity.RIGHT:
5694                            alignment = Layout.Alignment.ALIGN_RIGHT;
5695                            break;
5696                        case Gravity.CENTER_HORIZONTAL:
5697                            alignment = Layout.Alignment.ALIGN_CENTER;
5698                            break;
5699                        default:
5700                            alignment = Layout.Alignment.ALIGN_NORMAL;
5701                            break;
5702                    }
5703                    break;
5704                case TEXT_START:
5705                    alignment = Layout.Alignment.ALIGN_NORMAL;
5706                    break;
5707                case TEXT_END:
5708                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
5709                    break;
5710                case CENTER:
5711                    alignment = Layout.Alignment.ALIGN_CENTER;
5712                    break;
5713                case VIEW_START:
5714                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
5715                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
5716                    break;
5717                case VIEW_END:
5718                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
5719                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
5720                    break;
5721                default:
5722                    alignment = Layout.Alignment.ALIGN_NORMAL;
5723                    break;
5724            }
5725            mLayoutAlignment = alignment;
5726        }
5727        return mLayoutAlignment;
5728    }
5729
5730    /**
5731     * The width passed in is now the desired layout width,
5732     * not the full view width with padding.
5733     * {@hide}
5734     */
5735    protected void makeNewLayout(int wantWidth, int hintWidth,
5736                                 BoringLayout.Metrics boring,
5737                                 BoringLayout.Metrics hintBoring,
5738                                 int ellipsisWidth, boolean bringIntoView) {
5739        stopMarquee();
5740
5741        // Update "old" cached values
5742        mOldMaximum = mMaximum;
5743        mOldMaxMode = mMaxMode;
5744
5745        if (mEditor != null) getEditor().mHighlightPathBogus = true;
5746
5747        if (wantWidth < 0) {
5748            wantWidth = 0;
5749        }
5750        if (hintWidth < 0) {
5751            hintWidth = 0;
5752        }
5753
5754        Layout.Alignment alignment = getLayoutAlignment();
5755        boolean shouldEllipsize = mEllipsize != null && getKeyListener() == null;
5756        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
5757                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
5758        TruncateAt effectiveEllipsize = mEllipsize;
5759        if (mEllipsize == TruncateAt.MARQUEE &&
5760                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
5761            effectiveEllipsize = TruncateAt.END_SMALL;
5762        }
5763
5764        if (mTextDir == null) {
5765            resolveTextDirection();
5766        }
5767
5768        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
5769                effectiveEllipsize, effectiveEllipsize == mEllipsize);
5770        if (switchEllipsize) {
5771            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
5772                    TruncateAt.END : TruncateAt.MARQUEE;
5773            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
5774                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
5775        }
5776
5777        shouldEllipsize = mEllipsize != null;
5778        mHintLayout = null;
5779
5780        if (mHint != null) {
5781            if (shouldEllipsize) hintWidth = wantWidth;
5782
5783            if (hintBoring == UNKNOWN_BORING) {
5784                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
5785                                                   mHintBoring);
5786                if (hintBoring != null) {
5787                    mHintBoring = hintBoring;
5788                }
5789            }
5790
5791            if (hintBoring != null) {
5792                if (hintBoring.width <= hintWidth &&
5793                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5794                    if (mSavedHintLayout != null) {
5795                        mHintLayout = mSavedHintLayout.
5796                                replaceOrMake(mHint, mTextPaint,
5797                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5798                                hintBoring, mIncludePad);
5799                    } else {
5800                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5801                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5802                                hintBoring, mIncludePad);
5803                    }
5804
5805                    mSavedHintLayout = (BoringLayout) mHintLayout;
5806                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5807                    if (mSavedHintLayout != null) {
5808                        mHintLayout = mSavedHintLayout.
5809                                replaceOrMake(mHint, mTextPaint,
5810                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5811                                hintBoring, mIncludePad, mEllipsize,
5812                                ellipsisWidth);
5813                    } else {
5814                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5815                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5816                                hintBoring, mIncludePad, mEllipsize,
5817                                ellipsisWidth);
5818                    }
5819                } else if (shouldEllipsize) {
5820                    mHintLayout = new StaticLayout(mHint,
5821                                0, mHint.length(),
5822                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
5823                                mSpacingAdd, mIncludePad, mEllipsize,
5824                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
5825                } else {
5826                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5827                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
5828                            mIncludePad);
5829                }
5830            } else if (shouldEllipsize) {
5831                mHintLayout = new StaticLayout(mHint,
5832                            0, mHint.length(),
5833                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
5834                            mSpacingAdd, mIncludePad, mEllipsize,
5835                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
5836            } else {
5837                mHintLayout = new StaticLayout(mHint, mTextPaint,
5838                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
5839                        mIncludePad);
5840            }
5841        }
5842
5843        if (bringIntoView) {
5844            registerForPreDraw();
5845        }
5846
5847        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5848            if (!compressText(ellipsisWidth)) {
5849                final int height = mLayoutParams.height;
5850                // If the size of the view does not depend on the size of the text, try to
5851                // start the marquee immediately
5852                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5853                    startMarquee();
5854                } else {
5855                    // Defer the start of the marquee until we know our width (see setFrame())
5856                    mRestartMarquee = true;
5857                }
5858            }
5859        }
5860
5861        // CursorControllers need a non-null mLayout
5862        prepareCursorControllers();
5863    }
5864
5865    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
5866            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
5867            boolean useSaved) {
5868        Layout result = null;
5869        if (mText instanceof Spannable) {
5870            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
5871                    alignment, mTextDir, mSpacingMult,
5872                    mSpacingAdd, mIncludePad, getKeyListener() == null ? effectiveEllipsize : null,
5873                            ellipsisWidth);
5874        } else {
5875            if (boring == UNKNOWN_BORING) {
5876                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
5877                if (boring != null) {
5878                    mBoring = boring;
5879                }
5880            }
5881
5882            if (boring != null) {
5883                if (boring.width <= wantWidth &&
5884                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
5885                    if (useSaved && mSavedLayout != null) {
5886                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
5887                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
5888                                boring, mIncludePad);
5889                    } else {
5890                        result = BoringLayout.make(mTransformed, mTextPaint,
5891                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
5892                                boring, mIncludePad);
5893                    }
5894
5895                    if (useSaved) {
5896                        mSavedLayout = (BoringLayout) result;
5897                    }
5898                } else if (shouldEllipsize && boring.width <= wantWidth) {
5899                    if (useSaved && mSavedLayout != null) {
5900                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
5901                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
5902                                boring, mIncludePad, effectiveEllipsize,
5903                                ellipsisWidth);
5904                    } else {
5905                        result = BoringLayout.make(mTransformed, mTextPaint,
5906                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
5907                                boring, mIncludePad, effectiveEllipsize,
5908                                ellipsisWidth);
5909                    }
5910                } else if (shouldEllipsize) {
5911                    result = new StaticLayout(mTransformed,
5912                            0, mTransformed.length(),
5913                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
5914                            mSpacingAdd, mIncludePad, effectiveEllipsize,
5915                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
5916                } else {
5917                    result = new StaticLayout(mTransformed, mTextPaint,
5918                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
5919                            mIncludePad);
5920                }
5921            } else if (shouldEllipsize) {
5922                result = new StaticLayout(mTransformed,
5923                        0, mTransformed.length(),
5924                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
5925                        mSpacingAdd, mIncludePad, effectiveEllipsize,
5926                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
5927            } else {
5928                result = new StaticLayout(mTransformed, mTextPaint,
5929                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
5930                        mIncludePad);
5931            }
5932        }
5933        return result;
5934    }
5935
5936    private boolean compressText(float width) {
5937        if (isHardwareAccelerated()) return false;
5938
5939        // Only compress the text if it hasn't been compressed by the previous pass
5940        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5941                mTextPaint.getTextScaleX() == 1.0f) {
5942            final float textWidth = mLayout.getLineWidth(0);
5943            final float overflow = (textWidth + 1.0f - width) / width;
5944            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5945                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5946                post(new Runnable() {
5947                    public void run() {
5948                        requestLayout();
5949                    }
5950                });
5951                return true;
5952            }
5953        }
5954
5955        return false;
5956    }
5957
5958    private static int desired(Layout layout) {
5959        int n = layout.getLineCount();
5960        CharSequence text = layout.getText();
5961        float max = 0;
5962
5963        // if any line was wrapped, we can't use it.
5964        // but it's ok for the last line not to have a newline
5965
5966        for (int i = 0; i < n - 1; i++) {
5967            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5968                return -1;
5969        }
5970
5971        for (int i = 0; i < n; i++) {
5972            max = Math.max(max, layout.getLineWidth(i));
5973        }
5974
5975        return (int) FloatMath.ceil(max);
5976    }
5977
5978    /**
5979     * Set whether the TextView includes extra top and bottom padding to make
5980     * room for accents that go above the normal ascent and descent.
5981     * The default is true.
5982     *
5983     * @attr ref android.R.styleable#TextView_includeFontPadding
5984     */
5985    public void setIncludeFontPadding(boolean includepad) {
5986        if (mIncludePad != includepad) {
5987            mIncludePad = includepad;
5988
5989            if (mLayout != null) {
5990                nullLayouts();
5991                requestLayout();
5992                invalidate();
5993            }
5994        }
5995    }
5996
5997    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5998
5999    @Override
6000    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6001        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6002        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6003        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6004        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6005
6006        int width;
6007        int height;
6008
6009        BoringLayout.Metrics boring = UNKNOWN_BORING;
6010        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6011
6012        if (mTextDir == null) {
6013            resolveTextDirection();
6014        }
6015
6016        int des = -1;
6017        boolean fromexisting = false;
6018
6019        if (widthMode == MeasureSpec.EXACTLY) {
6020            // Parent has told us how big to be. So be it.
6021            width = widthSize;
6022        } else {
6023            if (mLayout != null && mEllipsize == null) {
6024                des = desired(mLayout);
6025            }
6026
6027            if (des < 0) {
6028                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6029                if (boring != null) {
6030                    mBoring = boring;
6031                }
6032            } else {
6033                fromexisting = true;
6034            }
6035
6036            if (boring == null || boring == UNKNOWN_BORING) {
6037                if (des < 0) {
6038                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6039                }
6040
6041                width = des;
6042            } else {
6043                width = boring.width;
6044            }
6045
6046            final Drawables dr = mDrawables;
6047            if (dr != null) {
6048                width = Math.max(width, dr.mDrawableWidthTop);
6049                width = Math.max(width, dr.mDrawableWidthBottom);
6050            }
6051
6052            if (mHint != null) {
6053                int hintDes = -1;
6054                int hintWidth;
6055
6056                if (mHintLayout != null && mEllipsize == null) {
6057                    hintDes = desired(mHintLayout);
6058                }
6059
6060                if (hintDes < 0) {
6061                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6062                    if (hintBoring != null) {
6063                        mHintBoring = hintBoring;
6064                    }
6065                }
6066
6067                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6068                    if (hintDes < 0) {
6069                        hintDes = (int) FloatMath.ceil(
6070                                Layout.getDesiredWidth(mHint, mTextPaint));
6071                    }
6072
6073                    hintWidth = hintDes;
6074                } else {
6075                    hintWidth = hintBoring.width;
6076                }
6077
6078                if (hintWidth > width) {
6079                    width = hintWidth;
6080                }
6081            }
6082
6083            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6084
6085            if (mMaxWidthMode == EMS) {
6086                width = Math.min(width, mMaxWidth * getLineHeight());
6087            } else {
6088                width = Math.min(width, mMaxWidth);
6089            }
6090
6091            if (mMinWidthMode == EMS) {
6092                width = Math.max(width, mMinWidth * getLineHeight());
6093            } else {
6094                width = Math.max(width, mMinWidth);
6095            }
6096
6097            // Check against our minimum width
6098            width = Math.max(width, getSuggestedMinimumWidth());
6099
6100            if (widthMode == MeasureSpec.AT_MOST) {
6101                width = Math.min(widthSize, width);
6102            }
6103        }
6104
6105        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6106        int unpaddedWidth = want;
6107
6108        if (mHorizontallyScrolling) want = VERY_WIDE;
6109
6110        int hintWant = want;
6111        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6112
6113        if (mLayout == null) {
6114            makeNewLayout(want, hintWant, boring, hintBoring,
6115                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6116        } else {
6117            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6118                    (hintWidth != hintWant) ||
6119                    (mLayout.getEllipsizedWidth() !=
6120                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6121
6122            final boolean widthChanged = (mHint == null) &&
6123                    (mEllipsize == null) &&
6124                    (want > mLayout.getWidth()) &&
6125                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6126
6127            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6128
6129            if (layoutChanged || maximumChanged) {
6130                if (!maximumChanged && widthChanged) {
6131                    mLayout.increaseWidthTo(want);
6132                } else {
6133                    makeNewLayout(want, hintWant, boring, hintBoring,
6134                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6135                }
6136            } else {
6137                // Nothing has changed
6138            }
6139        }
6140
6141        if (heightMode == MeasureSpec.EXACTLY) {
6142            // Parent has told us how big to be. So be it.
6143            height = heightSize;
6144            mDesiredHeightAtMeasure = -1;
6145        } else {
6146            int desired = getDesiredHeight();
6147
6148            height = desired;
6149            mDesiredHeightAtMeasure = desired;
6150
6151            if (heightMode == MeasureSpec.AT_MOST) {
6152                height = Math.min(desired, heightSize);
6153            }
6154        }
6155
6156        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6157        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6158            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6159        }
6160
6161        /*
6162         * We didn't let makeNewLayout() register to bring the cursor into view,
6163         * so do it here if there is any possibility that it is needed.
6164         */
6165        if (mMovement != null ||
6166            mLayout.getWidth() > unpaddedWidth ||
6167            mLayout.getHeight() > unpaddedHeight) {
6168            registerForPreDraw();
6169        } else {
6170            scrollTo(0, 0);
6171        }
6172
6173        setMeasuredDimension(width, height);
6174    }
6175
6176    private int getDesiredHeight() {
6177        return Math.max(
6178                getDesiredHeight(mLayout, true),
6179                getDesiredHeight(mHintLayout, mEllipsize != null));
6180    }
6181
6182    private int getDesiredHeight(Layout layout, boolean cap) {
6183        if (layout == null) {
6184            return 0;
6185        }
6186
6187        int linecount = layout.getLineCount();
6188        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6189        int desired = layout.getLineTop(linecount);
6190
6191        final Drawables dr = mDrawables;
6192        if (dr != null) {
6193            desired = Math.max(desired, dr.mDrawableHeightLeft);
6194            desired = Math.max(desired, dr.mDrawableHeightRight);
6195        }
6196
6197        desired += pad;
6198
6199        if (mMaxMode == LINES) {
6200            /*
6201             * Don't cap the hint to a certain number of lines.
6202             * (Do cap it, though, if we have a maximum pixel height.)
6203             */
6204            if (cap) {
6205                if (linecount > mMaximum) {
6206                    desired = layout.getLineTop(mMaximum);
6207
6208                    if (dr != null) {
6209                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6210                        desired = Math.max(desired, dr.mDrawableHeightRight);
6211                    }
6212
6213                    desired += pad;
6214                    linecount = mMaximum;
6215                }
6216            }
6217        } else {
6218            desired = Math.min(desired, mMaximum);
6219        }
6220
6221        if (mMinMode == LINES) {
6222            if (linecount < mMinimum) {
6223                desired += getLineHeight() * (mMinimum - linecount);
6224            }
6225        } else {
6226            desired = Math.max(desired, mMinimum);
6227        }
6228
6229        // Check against our minimum height
6230        desired = Math.max(desired, getSuggestedMinimumHeight());
6231
6232        return desired;
6233    }
6234
6235    /**
6236     * Check whether a change to the existing text layout requires a
6237     * new view layout.
6238     */
6239    private void checkForResize() {
6240        boolean sizeChanged = false;
6241
6242        if (mLayout != null) {
6243            // Check if our width changed
6244            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6245                sizeChanged = true;
6246                invalidate();
6247            }
6248
6249            // Check if our height changed
6250            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6251                int desiredHeight = getDesiredHeight();
6252
6253                if (desiredHeight != this.getHeight()) {
6254                    sizeChanged = true;
6255                }
6256            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6257                if (mDesiredHeightAtMeasure >= 0) {
6258                    int desiredHeight = getDesiredHeight();
6259
6260                    if (desiredHeight != mDesiredHeightAtMeasure) {
6261                        sizeChanged = true;
6262                    }
6263                }
6264            }
6265        }
6266
6267        if (sizeChanged) {
6268            requestLayout();
6269            // caller will have already invalidated
6270        }
6271    }
6272
6273    /**
6274     * Check whether entirely new text requires a new view layout
6275     * or merely a new text layout.
6276     */
6277    private void checkForRelayout() {
6278        // If we have a fixed width, we can just swap in a new text layout
6279        // if the text height stays the same or if the view height is fixed.
6280
6281        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6282                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6283                (mHint == null || mHintLayout != null) &&
6284                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6285            // Static width, so try making a new text layout.
6286
6287            int oldht = mLayout.getHeight();
6288            int want = mLayout.getWidth();
6289            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6290
6291            /*
6292             * No need to bring the text into view, since the size is not
6293             * changing (unless we do the requestLayout(), in which case it
6294             * will happen at measure).
6295             */
6296            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6297                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6298                          false);
6299
6300            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6301                // In a fixed-height view, so use our new text layout.
6302                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6303                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6304                    invalidate();
6305                    return;
6306                }
6307
6308                // Dynamic height, but height has stayed the same,
6309                // so use our new text layout.
6310                if (mLayout.getHeight() == oldht &&
6311                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6312                    invalidate();
6313                    return;
6314                }
6315            }
6316
6317            // We lose: the height has changed and we have a dynamic height.
6318            // Request a new view layout using our new text layout.
6319            requestLayout();
6320            invalidate();
6321        } else {
6322            // Dynamic width, so we have no choice but to request a new
6323            // view layout with a new text layout.
6324            nullLayouts();
6325            requestLayout();
6326            invalidate();
6327        }
6328    }
6329
6330    @Override
6331    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
6332        super.onLayout(changed, left, top, right, bottom);
6333        if (changed && mEditor != null) getEditor().mTextDisplayListIsValid = false;
6334    }
6335
6336    /**
6337     * Returns true if anything changed.
6338     */
6339    private boolean bringTextIntoView() {
6340        int line = 0;
6341        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6342            line = mLayout.getLineCount() - 1;
6343        }
6344
6345        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6346        int dir = mLayout.getParagraphDirection(line);
6347        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6348        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6349        int ht = mLayout.getHeight();
6350
6351        int scrollx, scrolly;
6352
6353        // Convert to left, center, or right alignment.
6354        if (a == Layout.Alignment.ALIGN_NORMAL) {
6355            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6356                Layout.Alignment.ALIGN_RIGHT;
6357        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6358            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6359                Layout.Alignment.ALIGN_LEFT;
6360        }
6361
6362        if (a == Layout.Alignment.ALIGN_CENTER) {
6363            /*
6364             * Keep centered if possible, or, if it is too wide to fit,
6365             * keep leading edge in view.
6366             */
6367
6368            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6369            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6370
6371            if (right - left < hspace) {
6372                scrollx = (right + left) / 2 - hspace / 2;
6373            } else {
6374                if (dir < 0) {
6375                    scrollx = right - hspace;
6376                } else {
6377                    scrollx = left;
6378                }
6379            }
6380        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6381            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6382            scrollx = right - hspace;
6383        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6384            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6385        }
6386
6387        if (ht < vspace) {
6388            scrolly = 0;
6389        } else {
6390            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6391                scrolly = ht - vspace;
6392            } else {
6393                scrolly = 0;
6394            }
6395        }
6396
6397        if (scrollx != mScrollX || scrolly != mScrollY) {
6398            scrollTo(scrollx, scrolly);
6399            return true;
6400        } else {
6401            return false;
6402        }
6403    }
6404
6405    /**
6406     * Move the point, specified by the offset, into the view if it is needed.
6407     * This has to be called after layout. Returns true if anything changed.
6408     */
6409    public boolean bringPointIntoView(int offset) {
6410        boolean changed = false;
6411
6412        if (mLayout == null) return changed;
6413
6414        int line = mLayout.getLineForOffset(offset);
6415
6416        // FIXME: Is it okay to truncate this, or should we round?
6417        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6418        final int top = mLayout.getLineTop(line);
6419        final int bottom = mLayout.getLineTop(line + 1);
6420
6421        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6422        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6423        int ht = mLayout.getHeight();
6424
6425        int grav;
6426
6427        switch (mLayout.getParagraphAlignment(line)) {
6428            case ALIGN_LEFT:
6429                grav = 1;
6430                break;
6431            case ALIGN_RIGHT:
6432                grav = -1;
6433                break;
6434            case ALIGN_NORMAL:
6435                grav = mLayout.getParagraphDirection(line);
6436                break;
6437            case ALIGN_OPPOSITE:
6438                grav = -mLayout.getParagraphDirection(line);
6439                break;
6440            case ALIGN_CENTER:
6441            default:
6442                grav = 0;
6443                break;
6444        }
6445
6446        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6447        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6448
6449        int hslack = (bottom - top) / 2;
6450        int vslack = hslack;
6451
6452        if (vslack > vspace / 4)
6453            vslack = vspace / 4;
6454        if (hslack > hspace / 4)
6455            hslack = hspace / 4;
6456
6457        int hs = mScrollX;
6458        int vs = mScrollY;
6459
6460        if (top - vs < vslack)
6461            vs = top - vslack;
6462        if (bottom - vs > vspace - vslack)
6463            vs = bottom - (vspace - vslack);
6464        if (ht - vs < vspace)
6465            vs = ht - vspace;
6466        if (0 - vs > 0)
6467            vs = 0;
6468
6469        if (grav != 0) {
6470            if (x - hs < hslack) {
6471                hs = x - hslack;
6472            }
6473            if (x - hs > hspace - hslack) {
6474                hs = x - (hspace - hslack);
6475            }
6476        }
6477
6478        if (grav < 0) {
6479            if (left - hs > 0)
6480                hs = left;
6481            if (right - hs < hspace)
6482                hs = right - hspace;
6483        } else if (grav > 0) {
6484            if (right - hs < hspace)
6485                hs = right - hspace;
6486            if (left - hs > 0)
6487                hs = left;
6488        } else /* grav == 0 */ {
6489            if (right - left <= hspace) {
6490                /*
6491                 * If the entire text fits, center it exactly.
6492                 */
6493                hs = left - (hspace - (right - left)) / 2;
6494            } else if (x > right - hslack) {
6495                /*
6496                 * If we are near the right edge, keep the right edge
6497                 * at the edge of the view.
6498                 */
6499                hs = right - hspace;
6500            } else if (x < left + hslack) {
6501                /*
6502                 * If we are near the left edge, keep the left edge
6503                 * at the edge of the view.
6504                 */
6505                hs = left;
6506            } else if (left > hs) {
6507                /*
6508                 * Is there whitespace visible at the left?  Fix it if so.
6509                 */
6510                hs = left;
6511            } else if (right < hs + hspace) {
6512                /*
6513                 * Is there whitespace visible at the right?  Fix it if so.
6514                 */
6515                hs = right - hspace;
6516            } else {
6517                /*
6518                 * Otherwise, float as needed.
6519                 */
6520                if (x - hs < hslack) {
6521                    hs = x - hslack;
6522                }
6523                if (x - hs > hspace - hslack) {
6524                    hs = x - (hspace - hslack);
6525                }
6526            }
6527        }
6528
6529        if (hs != mScrollX || vs != mScrollY) {
6530            if (mScroller == null) {
6531                scrollTo(hs, vs);
6532            } else {
6533                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6534                int dx = hs - mScrollX;
6535                int dy = vs - mScrollY;
6536
6537                if (duration > ANIMATED_SCROLL_GAP) {
6538                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6539                    awakenScrollBars(mScroller.getDuration());
6540                    invalidate();
6541                } else {
6542                    if (!mScroller.isFinished()) {
6543                        mScroller.abortAnimation();
6544                    }
6545
6546                    scrollBy(dx, dy);
6547                }
6548
6549                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6550            }
6551
6552            changed = true;
6553        }
6554
6555        if (isFocused()) {
6556            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6557            // requestRectangleOnScreen() is in terms of content coordinates.
6558
6559            // The offsets here are to ensure the rectangle we are using is
6560            // within our view bounds, in case the cursor is on the far left
6561            // or right.  If it isn't withing the bounds, then this request
6562            // will be ignored.
6563            if (mTempRect == null) mTempRect = new Rect();
6564            mTempRect.set(x - 2, top, x + 2, bottom);
6565            getInterestingRect(mTempRect, line);
6566            mTempRect.offset(mScrollX, mScrollY);
6567
6568            if (requestRectangleOnScreen(mTempRect)) {
6569                changed = true;
6570            }
6571        }
6572
6573        return changed;
6574    }
6575
6576    /**
6577     * Move the cursor, if needed, so that it is at an offset that is visible
6578     * to the user.  This will not move the cursor if it represents more than
6579     * one character (a selection range).  This will only work if the
6580     * TextView contains spannable text; otherwise it will do nothing.
6581     *
6582     * @return True if the cursor was actually moved, false otherwise.
6583     */
6584    public boolean moveCursorToVisibleOffset() {
6585        if (!(mText instanceof Spannable)) {
6586            return false;
6587        }
6588        int start = getSelectionStart();
6589        int end = getSelectionEnd();
6590        if (start != end) {
6591            return false;
6592        }
6593
6594        // First: make sure the line is visible on screen:
6595
6596        int line = mLayout.getLineForOffset(start);
6597
6598        final int top = mLayout.getLineTop(line);
6599        final int bottom = mLayout.getLineTop(line + 1);
6600        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6601        int vslack = (bottom - top) / 2;
6602        if (vslack > vspace / 4)
6603            vslack = vspace / 4;
6604        final int vs = mScrollY;
6605
6606        if (top < (vs+vslack)) {
6607            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6608        } else if (bottom > (vspace+vs-vslack)) {
6609            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6610        }
6611
6612        // Next: make sure the character is visible on screen:
6613
6614        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6615        final int hs = mScrollX;
6616        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6617        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6618
6619        // line might contain bidirectional text
6620        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6621        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6622
6623        int newStart = start;
6624        if (newStart < lowChar) {
6625            newStart = lowChar;
6626        } else if (newStart > highChar) {
6627            newStart = highChar;
6628        }
6629
6630        if (newStart != start) {
6631            Selection.setSelection((Spannable)mText, newStart);
6632            return true;
6633        }
6634
6635        return false;
6636    }
6637
6638    @Override
6639    public void computeScroll() {
6640        if (mScroller != null) {
6641            if (mScroller.computeScrollOffset()) {
6642                mScrollX = mScroller.getCurrX();
6643                mScrollY = mScroller.getCurrY();
6644                invalidateParentCaches();
6645                postInvalidate();  // So we draw again
6646            }
6647        }
6648    }
6649
6650    private void getInterestingRect(Rect r, int line) {
6651        convertFromViewportToContentCoordinates(r);
6652
6653        // Rectangle can can be expanded on first and last line to take
6654        // padding into account.
6655        // TODO Take left/right padding into account too?
6656        if (line == 0) r.top -= getExtendedPaddingTop();
6657        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6658    }
6659
6660    private void convertFromViewportToContentCoordinates(Rect r) {
6661        final int horizontalOffset = viewportToContentHorizontalOffset();
6662        r.left += horizontalOffset;
6663        r.right += horizontalOffset;
6664
6665        final int verticalOffset = viewportToContentVerticalOffset();
6666        r.top += verticalOffset;
6667        r.bottom += verticalOffset;
6668    }
6669
6670    private int viewportToContentHorizontalOffset() {
6671        return getCompoundPaddingLeft() - mScrollX;
6672    }
6673
6674    private int viewportToContentVerticalOffset() {
6675        int offset = getExtendedPaddingTop() - mScrollY;
6676        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6677            offset += getVerticalOffset(false);
6678        }
6679        return offset;
6680    }
6681
6682    @Override
6683    public void debug(int depth) {
6684        super.debug(depth);
6685
6686        String output = debugIndent(depth);
6687        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6688                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6689                + "} ";
6690
6691        if (mText != null) {
6692
6693            output += "mText=\"" + mText + "\" ";
6694            if (mLayout != null) {
6695                output += "mLayout width=" + mLayout.getWidth()
6696                        + " height=" + mLayout.getHeight();
6697            }
6698        } else {
6699            output += "mText=NULL";
6700        }
6701        Log.d(VIEW_LOG_TAG, output);
6702    }
6703
6704    /**
6705     * Convenience for {@link Selection#getSelectionStart}.
6706     */
6707    @ViewDebug.ExportedProperty(category = "text")
6708    public int getSelectionStart() {
6709        return Selection.getSelectionStart(getText());
6710    }
6711
6712    /**
6713     * Convenience for {@link Selection#getSelectionEnd}.
6714     */
6715    @ViewDebug.ExportedProperty(category = "text")
6716    public int getSelectionEnd() {
6717        return Selection.getSelectionEnd(getText());
6718    }
6719
6720    /**
6721     * Return true iff there is a selection inside this text view.
6722     */
6723    public boolean hasSelection() {
6724        final int selectionStart = getSelectionStart();
6725        final int selectionEnd = getSelectionEnd();
6726
6727        return selectionStart >= 0 && selectionStart != selectionEnd;
6728    }
6729
6730    /**
6731     * Sets the properties of this field (lines, horizontally scrolling,
6732     * transformation method) to be for a single-line input.
6733     *
6734     * @attr ref android.R.styleable#TextView_singleLine
6735     */
6736    public void setSingleLine() {
6737        setSingleLine(true);
6738    }
6739
6740    /**
6741     * Sets the properties of this field to transform input to ALL CAPS
6742     * display. This may use a "small caps" formatting if available.
6743     * This setting will be ignored if this field is editable or selectable.
6744     *
6745     * This call replaces the current transformation method. Disabling this
6746     * will not necessarily restore the previous behavior from before this
6747     * was enabled.
6748     *
6749     * @see #setTransformationMethod(TransformationMethod)
6750     * @attr ref android.R.styleable#TextView_textAllCaps
6751     */
6752    public void setAllCaps(boolean allCaps) {
6753        if (allCaps) {
6754            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
6755        } else {
6756            setTransformationMethod(null);
6757        }
6758    }
6759
6760    /**
6761     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6762     * transformation method) to be for a single-line input; if false, restores these to the default
6763     * conditions.
6764     *
6765     * Note that the default conditions are not necessarily those that were in effect prior this
6766     * method, and you may want to reset these properties to your custom values.
6767     *
6768     * @attr ref android.R.styleable#TextView_singleLine
6769     */
6770    @android.view.RemotableViewMethod
6771    public void setSingleLine(boolean singleLine) {
6772        // Could be used, but may break backward compatibility.
6773        // if (mSingleLine == singleLine) return;
6774        setInputTypeSingleLine(singleLine);
6775        applySingleLine(singleLine, true, true);
6776    }
6777
6778    /**
6779     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6780     * @param singleLine
6781     */
6782    private void setInputTypeSingleLine(boolean singleLine) {
6783        if (mEditor != null && (getEditor().mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6784            if (singleLine) {
6785                getEditor().mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6786            } else {
6787                getEditor().mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6788            }
6789        }
6790    }
6791
6792    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6793            boolean changeMaxLines) {
6794        mSingleLine = singleLine;
6795        if (singleLine) {
6796            setLines(1);
6797            setHorizontallyScrolling(true);
6798            if (applyTransformation) {
6799                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6800            }
6801        } else {
6802            if (changeMaxLines) {
6803                setMaxLines(Integer.MAX_VALUE);
6804            }
6805            setHorizontallyScrolling(false);
6806            if (applyTransformation) {
6807                setTransformationMethod(null);
6808            }
6809        }
6810    }
6811
6812    /**
6813     * Causes words in the text that are longer than the view is wide
6814     * to be ellipsized instead of broken in the middle.  You may also
6815     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6816     * to constrain the text to a single line.  Use <code>null</code>
6817     * to turn off ellipsizing.
6818     *
6819     * If {@link #setMaxLines} has been used to set two or more lines,
6820     * {@link android.text.TextUtils.TruncateAt#END} and
6821     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
6822     * (other ellipsizing types will not do anything).
6823     *
6824     * @attr ref android.R.styleable#TextView_ellipsize
6825     */
6826    public void setEllipsize(TextUtils.TruncateAt where) {
6827        // TruncateAt is an enum. != comparison is ok between these singleton objects.
6828        if (mEllipsize != where) {
6829            mEllipsize = where;
6830
6831            if (mLayout != null) {
6832                nullLayouts();
6833                requestLayout();
6834                invalidate();
6835            }
6836        }
6837    }
6838
6839    /**
6840     * Sets how many times to repeat the marquee animation. Only applied if the
6841     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6842     *
6843     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6844     */
6845    public void setMarqueeRepeatLimit(int marqueeLimit) {
6846        mMarqueeRepeatLimit = marqueeLimit;
6847    }
6848
6849    /**
6850     * Returns where, if anywhere, words that are longer than the view
6851     * is wide should be ellipsized.
6852     */
6853    @ViewDebug.ExportedProperty
6854    public TextUtils.TruncateAt getEllipsize() {
6855        return mEllipsize;
6856    }
6857
6858    /**
6859     * Set the TextView so that when it takes focus, all the text is
6860     * selected.
6861     *
6862     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6863     */
6864    @android.view.RemotableViewMethod
6865    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6866        createEditorIfNeeded("setSelectAllOnFocus");
6867        getEditor().mSelectAllOnFocus = selectAllOnFocus;
6868
6869        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6870            setText(mText, BufferType.SPANNABLE);
6871        }
6872    }
6873
6874    /**
6875     * Set whether the cursor is visible.  The default is true.
6876     *
6877     * @attr ref android.R.styleable#TextView_cursorVisible
6878     */
6879    @android.view.RemotableViewMethod
6880    public void setCursorVisible(boolean visible) {
6881        if (visible && mEditor == null) return; // visible is the default value with no edit data
6882        createEditorIfNeeded("setCursorVisible");
6883        if (getEditor().mCursorVisible != visible) {
6884            getEditor().mCursorVisible = visible;
6885            invalidate();
6886
6887            makeBlink();
6888
6889            // InsertionPointCursorController depends on mCursorVisible
6890            prepareCursorControllers();
6891        }
6892    }
6893
6894    private boolean isCursorVisible() {
6895        // The default value is true, even when there is no associated Editor
6896        return mEditor == null ? true : (getEditor().mCursorVisible && isTextEditable());
6897    }
6898
6899    private boolean canMarquee() {
6900        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6901        return width > 0 && (mLayout.getLineWidth(0) > width ||
6902                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
6903                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
6904    }
6905
6906    private void startMarquee() {
6907        // Do not ellipsize EditText
6908        if (getKeyListener() != null) return;
6909
6910        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6911            return;
6912        }
6913
6914        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6915                getLineCount() == 1 && canMarquee()) {
6916
6917            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6918                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
6919                final Layout tmp = mLayout;
6920                mLayout = mSavedMarqueeModeLayout;
6921                mSavedMarqueeModeLayout = tmp;
6922                setHorizontalFadingEdgeEnabled(true);
6923                requestLayout();
6924                invalidate();
6925            }
6926
6927            if (mMarquee == null) mMarquee = new Marquee(this);
6928            mMarquee.start(mMarqueeRepeatLimit);
6929        }
6930    }
6931
6932    private void stopMarquee() {
6933        if (mMarquee != null && !mMarquee.isStopped()) {
6934            mMarquee.stop();
6935        }
6936
6937        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
6938            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
6939            final Layout tmp = mSavedMarqueeModeLayout;
6940            mSavedMarqueeModeLayout = mLayout;
6941            mLayout = tmp;
6942            setHorizontalFadingEdgeEnabled(false);
6943            requestLayout();
6944            invalidate();
6945        }
6946    }
6947
6948    private void startStopMarquee(boolean start) {
6949        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6950            if (start) {
6951                startMarquee();
6952            } else {
6953                stopMarquee();
6954            }
6955        }
6956    }
6957
6958    /**
6959     * This method is called when the text is changed, in case any subclasses
6960     * would like to know.
6961     *
6962     * Within <code>text</code>, the <code>lengthAfter</code> characters
6963     * beginning at <code>start</code> have just replaced old text that had
6964     * length <code>lengthBefore</code>. It is an error to attempt to make
6965     * changes to <code>text</code> from this callback.
6966     *
6967     * @param text The text the TextView is displaying
6968     * @param start The offset of the start of the range of the text that was
6969     * modified
6970     * @param lengthBefore The length of the former text that has been replaced
6971     * @param lengthAfter The length of the replacement modified text
6972     */
6973    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
6974        // intentionally empty, template pattern method can be overridden by subclasses
6975    }
6976
6977    /**
6978     * This method is called when the selection has changed, in case any
6979     * subclasses would like to know.
6980     *
6981     * @param selStart The new selection start location.
6982     * @param selEnd The new selection end location.
6983     */
6984    protected void onSelectionChanged(int selStart, int selEnd) {
6985        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
6986        getEditor().mTextDisplayListIsValid = false;
6987    }
6988
6989    /**
6990     * Adds a TextWatcher to the list of those whose methods are called
6991     * whenever this TextView's text changes.
6992     * <p>
6993     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6994     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6995     * if there are any text changed listeners forces the buffer type to
6996     * Editable if it would not otherwise be and does call this method.
6997     */
6998    public void addTextChangedListener(TextWatcher watcher) {
6999        if (mListeners == null) {
7000            mListeners = new ArrayList<TextWatcher>();
7001        }
7002
7003        mListeners.add(watcher);
7004    }
7005
7006    /**
7007     * Removes the specified TextWatcher from the list of those whose
7008     * methods are called
7009     * whenever this TextView's text changes.
7010     */
7011    public void removeTextChangedListener(TextWatcher watcher) {
7012        if (mListeners != null) {
7013            int i = mListeners.indexOf(watcher);
7014
7015            if (i >= 0) {
7016                mListeners.remove(i);
7017            }
7018        }
7019    }
7020
7021    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7022        if (mListeners != null) {
7023            final ArrayList<TextWatcher> list = mListeners;
7024            final int count = list.size();
7025            for (int i = 0; i < count; i++) {
7026                list.get(i).beforeTextChanged(text, start, before, after);
7027            }
7028        }
7029
7030        // The spans that are inside or intersect the modified region no longer make sense
7031        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7032        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7033    }
7034
7035    // Removes all spans that are inside or actually overlap the start..end range
7036    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7037        if (!(mText instanceof Editable)) return;
7038        Editable text = (Editable) mText;
7039
7040        T[] spans = text.getSpans(start, end, type);
7041        final int length = spans.length;
7042        for (int i = 0; i < length; i++) {
7043            final int s = text.getSpanStart(spans[i]);
7044            final int e = text.getSpanEnd(spans[i]);
7045            // Spans that are adjacent to the edited region will be handled in
7046            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7047            if (e == start || s == end) break;
7048            text.removeSpan(spans[i]);
7049        }
7050    }
7051
7052    /**
7053     * Not private so it can be called from an inner class without going
7054     * through a thunk.
7055     */
7056    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7057        if (mListeners != null) {
7058            final ArrayList<TextWatcher> list = mListeners;
7059            final int count = list.size();
7060            for (int i = 0; i < count; i++) {
7061                list.get(i).onTextChanged(text, start, before, after);
7062            }
7063        }
7064
7065        if (mEditor != null) getEditor().sendOnTextChanged(start, after);
7066    }
7067
7068    /**
7069     * Not private so it can be called from an inner class without going
7070     * through a thunk.
7071     */
7072    void sendAfterTextChanged(Editable text) {
7073        if (mListeners != null) {
7074            final ArrayList<TextWatcher> list = mListeners;
7075            final int count = list.size();
7076            for (int i = 0; i < count; i++) {
7077                list.get(i).afterTextChanged(text);
7078            }
7079        }
7080    }
7081
7082    /**
7083     * Not private so it can be called from an inner class without going
7084     * through a thunk.
7085     */
7086    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7087        final InputMethodState ims = mEditor == null ? null : getEditor().mInputMethodState;
7088        if (ims == null || ims.mBatchEditNesting == 0) {
7089            updateAfterEdit();
7090        }
7091        if (ims != null) {
7092            ims.mContentChanged = true;
7093            if (ims.mChangedStart < 0) {
7094                ims.mChangedStart = start;
7095                ims.mChangedEnd = start+before;
7096            } else {
7097                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7098                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7099            }
7100            ims.mChangedDelta += after-before;
7101        }
7102
7103        sendOnTextChanged(buffer, start, before, after);
7104        onTextChanged(buffer, start, before, after);
7105    }
7106
7107    /**
7108     * Not private so it can be called from an inner class without going
7109     * through a thunk.
7110     */
7111    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7112        // XXX Make the start and end move together if this ends up
7113        // spending too much time invalidating.
7114
7115        boolean selChanged = false;
7116        int newSelStart=-1, newSelEnd=-1;
7117
7118        final InputMethodState ims = mEditor == null ? null : getEditor().mInputMethodState;
7119
7120        if (what == Selection.SELECTION_END) {
7121            selChanged = true;
7122            newSelEnd = newStart;
7123
7124            if (oldStart >= 0 || newStart >= 0) {
7125                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7126                registerForPreDraw();
7127                makeBlink();
7128            }
7129        }
7130
7131        if (what == Selection.SELECTION_START) {
7132            selChanged = true;
7133            newSelStart = newStart;
7134
7135            if (oldStart >= 0 || newStart >= 0) {
7136                int end = Selection.getSelectionEnd(buf);
7137                invalidateCursor(end, oldStart, newStart);
7138            }
7139        }
7140
7141        if (selChanged) {
7142            if (mEditor != null) {
7143                getEditor().mHighlightPathBogus = true;
7144                if (!isFocused()) getEditor().mSelectionMoved = true;
7145            }
7146
7147            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7148                if (newSelStart < 0) {
7149                    newSelStart = Selection.getSelectionStart(buf);
7150                }
7151                if (newSelEnd < 0) {
7152                    newSelEnd = Selection.getSelectionEnd(buf);
7153                }
7154                onSelectionChanged(newSelStart, newSelEnd);
7155            }
7156        }
7157
7158        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle ||
7159                what instanceof CharacterStyle) {
7160            if (ims == null || ims.mBatchEditNesting == 0) {
7161                invalidate();
7162                if (mEditor != null) getEditor().mHighlightPathBogus = true;
7163                checkForResize();
7164            } else {
7165                ims.mContentChanged = true;
7166            }
7167            if (mEditor != null) getEditor().mTextDisplayListIsValid = false;
7168        }
7169
7170        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7171            if (mEditor != null) getEditor().mHighlightPathBogus = true;
7172            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7173                ims.mSelectionModeChanged = true;
7174            }
7175
7176            if (Selection.getSelectionStart(buf) >= 0) {
7177                if (ims == null || ims.mBatchEditNesting == 0) {
7178                    invalidateCursor();
7179                } else {
7180                    ims.mCursorChanged = true;
7181                }
7182            }
7183        }
7184
7185        if (what instanceof ParcelableSpan) {
7186            // If this is a span that can be sent to a remote process,
7187            // the current extract editor would be interested in it.
7188            if (ims != null && ims.mExtracting != null) {
7189                if (ims.mBatchEditNesting != 0) {
7190                    if (oldStart >= 0) {
7191                        if (ims.mChangedStart > oldStart) {
7192                            ims.mChangedStart = oldStart;
7193                        }
7194                        if (ims.mChangedStart > oldEnd) {
7195                            ims.mChangedStart = oldEnd;
7196                        }
7197                    }
7198                    if (newStart >= 0) {
7199                        if (ims.mChangedStart > newStart) {
7200                            ims.mChangedStart = newStart;
7201                        }
7202                        if (ims.mChangedStart > newEnd) {
7203                            ims.mChangedStart = newEnd;
7204                        }
7205                    }
7206                } else {
7207                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7208                            + oldStart + "-" + oldEnd + ","
7209                            + newStart + "-" + newEnd + what);
7210                    ims.mContentChanged = true;
7211                }
7212            }
7213        }
7214
7215        if (mEditor != null && getEditor().mSpellChecker != null && newStart < 0 && what instanceof SpellCheckSpan) {
7216            getEditor().mSpellChecker.removeSpellCheckSpan((SpellCheckSpan) what);
7217        }
7218    }
7219
7220    /**
7221     * Create new SpellCheckSpans on the modified region.
7222     */
7223    private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) {
7224        if (isTextEditable() && isSuggestionsEnabled() && !(this instanceof ExtractEditText)) {
7225            if (getEditor().mSpellChecker == null && createSpellChecker) {
7226                getEditor().mSpellChecker = new SpellChecker(this);
7227            }
7228            if (getEditor().mSpellChecker != null) {
7229                getEditor().mSpellChecker.spellCheck(start, end);
7230            }
7231        }
7232    }
7233
7234    /**
7235     * @hide
7236     */
7237    @Override
7238    public void dispatchFinishTemporaryDetach() {
7239        mDispatchTemporaryDetach = true;
7240        super.dispatchFinishTemporaryDetach();
7241        mDispatchTemporaryDetach = false;
7242    }
7243
7244    @Override
7245    public void onStartTemporaryDetach() {
7246        super.onStartTemporaryDetach();
7247        // Only track when onStartTemporaryDetach() is called directly,
7248        // usually because this instance is an editable field in a list
7249        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7250
7251        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7252        // selection becomes visible again. Until a better solution is found, stop text selection
7253        // mode (if any) as soon as this TextView is recycled.
7254        if (mEditor != null) hideControllers();
7255    }
7256
7257    @Override
7258    public void onFinishTemporaryDetach() {
7259        super.onFinishTemporaryDetach();
7260        // Only track when onStartTemporaryDetach() is called directly,
7261        // usually because this instance is an editable field in a list
7262        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7263    }
7264
7265    @Override
7266    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7267        if (mTemporaryDetach) {
7268            // If we are temporarily in the detach state, then do nothing.
7269            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7270            return;
7271        }
7272
7273        if (mEditor != null) getEditor().onFocusChanged(focused, direction);
7274
7275        if (focused) {
7276            if (mText instanceof Spannable) {
7277                Spannable sp = (Spannable) mText;
7278                MetaKeyKeyListener.resetMetaState(sp);
7279            }
7280        }
7281
7282        startStopMarquee(focused);
7283
7284        if (mTransformation != null) {
7285            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7286        }
7287
7288        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7289    }
7290
7291    @Override
7292    public void onWindowFocusChanged(boolean hasWindowFocus) {
7293        super.onWindowFocusChanged(hasWindowFocus);
7294
7295        if (mEditor != null) getEditor().onWindowFocusChanged(hasWindowFocus);
7296
7297        startStopMarquee(hasWindowFocus);
7298    }
7299
7300    @Override
7301    protected void onVisibilityChanged(View changedView, int visibility) {
7302        super.onVisibilityChanged(changedView, visibility);
7303        if (mEditor != null && visibility != VISIBLE) {
7304            hideControllers();
7305        }
7306    }
7307
7308    /**
7309     * Use {@link BaseInputConnection#removeComposingSpans
7310     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7311     * state from this text view.
7312     */
7313    public void clearComposingText() {
7314        if (mText instanceof Spannable) {
7315            BaseInputConnection.removeComposingSpans((Spannable)mText);
7316        }
7317    }
7318
7319    @Override
7320    public void setSelected(boolean selected) {
7321        boolean wasSelected = isSelected();
7322
7323        super.setSelected(selected);
7324
7325        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7326            if (selected) {
7327                startMarquee();
7328            } else {
7329                stopMarquee();
7330            }
7331        }
7332    }
7333
7334    @Override
7335    public boolean onTouchEvent(MotionEvent event) {
7336        final int action = event.getActionMasked();
7337
7338        if (mEditor != null) getEditor().onTouchEvent(event);
7339
7340        final boolean superResult = super.onTouchEvent(event);
7341
7342        /*
7343         * Don't handle the release after a long press, because it will
7344         * move the selection away from whatever the menu action was
7345         * trying to affect.
7346         */
7347        if (mEditor != null && getEditor().mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7348            getEditor().mDiscardNextActionUp = false;
7349            return superResult;
7350        }
7351
7352        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
7353                (mEditor == null || !getEditor().mIgnoreActionUpEvent) && isFocused();
7354
7355         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7356                && mText instanceof Spannable && mLayout != null) {
7357            boolean handled = false;
7358
7359            if (mMovement != null) {
7360                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7361            }
7362
7363            final boolean textIsSelectable = isTextSelectable();
7364            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && textIsSelectable) {
7365                // The LinkMovementMethod which should handle taps on links has not been installed
7366                // on non editable text that support text selection.
7367                // We reproduce its behavior here to open links for these.
7368                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7369                        getSelectionEnd(), ClickableSpan.class);
7370
7371                if (links.length > 0) {
7372                    links[0].onClick(this);
7373                    handled = true;
7374                }
7375            }
7376
7377            if (touchIsFinished && (isTextEditable() || textIsSelectable)) {
7378                // Show the IME, except when selecting in read-only text.
7379                final InputMethodManager imm = InputMethodManager.peekInstance();
7380                viewClicked(imm);
7381                if (!textIsSelectable) {
7382                    handled |= imm != null && imm.showSoftInput(this, 0);
7383                }
7384
7385                boolean selectAllGotFocus = getEditor().mSelectAllOnFocus && didTouchFocusSelect();
7386                hideControllers();
7387                if (!selectAllGotFocus && mText.length() > 0) {
7388                    // Move cursor
7389                    final int offset = getOffsetForPosition(event.getX(), event.getY());
7390                    Selection.setSelection((Spannable) mText, offset);
7391                    if (getEditor().mSpellChecker != null) {
7392                        // When the cursor moves, the word that was typed may need spell check
7393                        getEditor().mSpellChecker.onSelectionChanged();
7394                    }
7395                    if (!extractedTextModeWillBeStarted()) {
7396                        if (isCursorInsideEasyCorrectionSpan()) {
7397                            getEditor().mShowSuggestionRunnable = new Runnable() {
7398                                public void run() {
7399                                    showSuggestions();
7400                                }
7401                            };
7402                            // removeCallbacks is performed on every touch
7403                            postDelayed(getEditor().mShowSuggestionRunnable,
7404                                    ViewConfiguration.getDoubleTapTimeout());
7405                        } else if (hasInsertionController()) {
7406                            getInsertionController().show();
7407                        }
7408                    }
7409                }
7410
7411                handled = true;
7412            }
7413
7414            if (handled) {
7415                return true;
7416            }
7417        }
7418
7419        return superResult;
7420    }
7421
7422    /**
7423     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
7424     */
7425    private boolean isCursorInsideSuggestionSpan() {
7426        if (!(mText instanceof Spannable)) return false;
7427
7428        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
7429                getSelectionEnd(), SuggestionSpan.class);
7430        return (suggestionSpans.length > 0);
7431    }
7432
7433    /**
7434     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
7435     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
7436     */
7437    private boolean isCursorInsideEasyCorrectionSpan() {
7438        Spannable spannable = (Spannable) mText;
7439        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
7440                getSelectionEnd(), SuggestionSpan.class);
7441        for (int i = 0; i < suggestionSpans.length; i++) {
7442            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
7443                return true;
7444            }
7445        }
7446        return false;
7447    }
7448
7449    /**
7450     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
7451     * span.
7452     */
7453    private void downgradeEasyCorrectionSpans() {
7454        if (mText instanceof Spannable) {
7455            Spannable spannable = (Spannable) mText;
7456            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
7457                    spannable.length(), SuggestionSpan.class);
7458            for (int i = 0; i < suggestionSpans.length; i++) {
7459                int flags = suggestionSpans[i].getFlags();
7460                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
7461                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
7462                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
7463                    suggestionSpans[i].setFlags(flags);
7464                }
7465            }
7466        }
7467    }
7468
7469    @Override
7470    public boolean onGenericMotionEvent(MotionEvent event) {
7471        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7472            try {
7473                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7474                    return true;
7475                }
7476            } catch (AbstractMethodError ex) {
7477                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7478                // Ignore its absence in case third party applications implemented the
7479                // interface directly.
7480            }
7481        }
7482        return super.onGenericMotionEvent(event);
7483    }
7484
7485    private void prepareCursorControllers() {
7486        if (mEditor == null) return;
7487
7488        boolean windowSupportsHandles = false;
7489
7490        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7491        if (params instanceof WindowManager.LayoutParams) {
7492            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7493            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7494                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7495        }
7496
7497        getEditor().mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7498        getEditor().mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7499                mLayout != null;
7500
7501        if (!getEditor().mInsertionControllerEnabled) {
7502            hideInsertionPointCursorController();
7503            if (getEditor().mInsertionPointCursorController != null) {
7504                getEditor().mInsertionPointCursorController.onDetached();
7505                getEditor().mInsertionPointCursorController = null;
7506            }
7507        }
7508
7509        if (!getEditor().mSelectionControllerEnabled) {
7510            stopSelectionActionMode();
7511            if (getEditor().mSelectionModifierCursorController != null) {
7512                getEditor().mSelectionModifierCursorController.onDetached();
7513                getEditor().mSelectionModifierCursorController = null;
7514            }
7515        }
7516    }
7517
7518    /**
7519     * @return True iff this TextView contains a text that can be edited, or if this is
7520     * a selectable TextView.
7521     */
7522    private boolean isTextEditable() {
7523        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7524    }
7525
7526    /**
7527     * Returns true, only while processing a touch gesture, if the initial
7528     * touch down event caused focus to move to the text view and as a result
7529     * its selection changed.  Only valid while processing the touch gesture
7530     * of interest.
7531     */
7532    public boolean didTouchFocusSelect() {
7533        return mEditor != null && getEditor().mTouchFocusSelected;
7534    }
7535
7536    @Override
7537    public void cancelLongPress() {
7538        super.cancelLongPress();
7539        if (mEditor != null) getEditor().mIgnoreActionUpEvent = true;
7540    }
7541
7542    @Override
7543    public boolean onTrackballEvent(MotionEvent event) {
7544        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7545            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7546                return true;
7547            }
7548        }
7549
7550        return super.onTrackballEvent(event);
7551    }
7552
7553    public void setScroller(Scroller s) {
7554        mScroller = s;
7555    }
7556
7557    /**
7558     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
7559     */
7560    private boolean shouldBlink() {
7561        if (mEditor == null || !isCursorVisible() || !isFocused()) return false;
7562
7563        final int start = getSelectionStart();
7564        if (start < 0) return false;
7565
7566        final int end = getSelectionEnd();
7567        if (end < 0) return false;
7568
7569        return start == end;
7570    }
7571
7572    private void makeBlink() {
7573        if (shouldBlink()) {
7574            getEditor().mShowCursor = SystemClock.uptimeMillis();
7575            if (getEditor().mBlink == null) getEditor().mBlink = new Blink(this);
7576            getEditor().mBlink.removeCallbacks(getEditor().mBlink);
7577            getEditor().mBlink.postAtTime(getEditor().mBlink, getEditor().mShowCursor + BLINK);
7578        } else {
7579            if (mEditor != null && getEditor().mBlink != null) getEditor().mBlink.removeCallbacks(getEditor().mBlink);
7580        }
7581    }
7582
7583    @Override
7584    protected float getLeftFadingEdgeStrength() {
7585        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7586        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
7587                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7588            if (mMarquee != null && !mMarquee.isStopped()) {
7589                final Marquee marquee = mMarquee;
7590                if (marquee.shouldDrawLeftFade()) {
7591                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7592                } else {
7593                    return 0.0f;
7594                }
7595            } else if (getLineCount() == 1) {
7596                final int layoutDirection = getResolvedLayoutDirection();
7597                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
7598                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7599                    case Gravity.LEFT:
7600                        return 0.0f;
7601                    case Gravity.RIGHT:
7602                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7603                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7604                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7605                    case Gravity.CENTER_HORIZONTAL:
7606                        return 0.0f;
7607                }
7608            }
7609        }
7610        return super.getLeftFadingEdgeStrength();
7611    }
7612
7613    @Override
7614    protected float getRightFadingEdgeStrength() {
7615        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7616        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
7617                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7618            if (mMarquee != null && !mMarquee.isStopped()) {
7619                final Marquee marquee = mMarquee;
7620                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7621            } else if (getLineCount() == 1) {
7622                final int layoutDirection = getResolvedLayoutDirection();
7623                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
7624                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7625                    case Gravity.LEFT:
7626                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7627                                getCompoundPaddingRight();
7628                        final float lineWidth = mLayout.getLineWidth(0);
7629                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7630                    case Gravity.RIGHT:
7631                        return 0.0f;
7632                    case Gravity.CENTER_HORIZONTAL:
7633                    case Gravity.FILL_HORIZONTAL:
7634                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7635                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7636                                getHorizontalFadingEdgeLength();
7637                }
7638            }
7639        }
7640        return super.getRightFadingEdgeStrength();
7641    }
7642
7643    @Override
7644    protected int computeHorizontalScrollRange() {
7645        if (mLayout != null) {
7646            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7647                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7648        }
7649
7650        return super.computeHorizontalScrollRange();
7651    }
7652
7653    @Override
7654    protected int computeVerticalScrollRange() {
7655        if (mLayout != null)
7656            return mLayout.getHeight();
7657
7658        return super.computeVerticalScrollRange();
7659    }
7660
7661    @Override
7662    protected int computeVerticalScrollExtent() {
7663        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7664    }
7665
7666    @Override
7667    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
7668        super.findViewsWithText(outViews, searched, flags);
7669        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
7670                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
7671            String searchedLowerCase = searched.toString().toLowerCase();
7672            String textLowerCase = mText.toString().toLowerCase();
7673            if (textLowerCase.contains(searchedLowerCase)) {
7674                outViews.add(this);
7675            }
7676        }
7677    }
7678
7679    public enum BufferType {
7680        NORMAL, SPANNABLE, EDITABLE,
7681    }
7682
7683    /**
7684     * Returns the TextView_textColor attribute from the
7685     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7686     * from the TextView_textAppearance attribute, if TextView_textColor
7687     * was not set directly.
7688     */
7689    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7690        ColorStateList colors;
7691        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7692                                         TextView_textColor);
7693
7694        if (colors == null) {
7695            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7696                                         TextView_textAppearance, -1);
7697            if (ap != -1) {
7698                TypedArray appearance;
7699                appearance = context.obtainStyledAttributes(ap,
7700                                            com.android.internal.R.styleable.TextAppearance);
7701                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7702                                                  TextAppearance_textColor);
7703                appearance.recycle();
7704            }
7705        }
7706
7707        return colors;
7708    }
7709
7710    /**
7711     * Returns the default color from the TextView_textColor attribute
7712     * from the AttributeSet, if set, or the default color from the
7713     * TextAppearance_textColor from the TextView_textAppearance attribute,
7714     * if TextView_textColor was not set directly.
7715     */
7716    public static int getTextColor(Context context,
7717                                   TypedArray attrs,
7718                                   int def) {
7719        ColorStateList colors = getTextColors(context, attrs);
7720
7721        if (colors == null) {
7722            return def;
7723        } else {
7724            return colors.getDefaultColor();
7725        }
7726    }
7727
7728    @Override
7729    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7730        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7731        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7732            switch (keyCode) {
7733            case KeyEvent.KEYCODE_A:
7734                if (canSelectText()) {
7735                    return onTextContextMenuItem(ID_SELECT_ALL);
7736                }
7737                break;
7738            case KeyEvent.KEYCODE_X:
7739                if (canCut()) {
7740                    return onTextContextMenuItem(ID_CUT);
7741                }
7742                break;
7743            case KeyEvent.KEYCODE_C:
7744                if (canCopy()) {
7745                    return onTextContextMenuItem(ID_COPY);
7746                }
7747                break;
7748            case KeyEvent.KEYCODE_V:
7749                if (canPaste()) {
7750                    return onTextContextMenuItem(ID_PASTE);
7751                }
7752                break;
7753            }
7754        }
7755        return super.onKeyShortcut(keyCode, event);
7756    }
7757
7758    /**
7759     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7760     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7761     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7762     */
7763    private boolean canSelectText() {
7764        return hasSelectionController() && mText.length() != 0;
7765    }
7766
7767    /**
7768     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7769     * The text must be spannable and the movement method must allow for arbitary selection.
7770     *
7771     * See also {@link #canSelectText()}.
7772     */
7773    private boolean textCanBeSelected() {
7774        // prepareCursorController() relies on this method.
7775        // If you change this condition, make sure prepareCursorController is called anywhere
7776        // the value of this condition might be changed.
7777        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
7778        return isTextEditable() || (isTextSelectable() && mText instanceof Spannable && isEnabled());
7779    }
7780
7781    private boolean canCut() {
7782        if (hasPasswordTransformationMethod()) {
7783            return false;
7784        }
7785
7786        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mEditor != null && getEditor().mKeyListener != null) {
7787            return true;
7788        }
7789
7790        return false;
7791    }
7792
7793    private boolean canCopy() {
7794        if (hasPasswordTransformationMethod()) {
7795            return false;
7796        }
7797
7798        if (mText.length() > 0 && hasSelection()) {
7799            return true;
7800        }
7801
7802        return false;
7803    }
7804
7805    private boolean canPaste() {
7806        return (mText instanceof Editable &&
7807                mEditor != null && getEditor().mKeyListener != null &&
7808                getSelectionStart() >= 0 &&
7809                getSelectionEnd() >= 0 &&
7810                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7811                hasPrimaryClip());
7812    }
7813
7814    private static long packRangeInLong(int start, int end) {
7815        return (((long) start) << 32) | end;
7816    }
7817
7818    private static int extractRangeStartFromLong(long range) {
7819        return (int) (range >>> 32);
7820    }
7821
7822    private static int extractRangeEndFromLong(long range) {
7823        return (int) (range & 0x00000000FFFFFFFFL);
7824    }
7825
7826    private boolean selectAll() {
7827        final int length = mText.length();
7828        Selection.setSelection((Spannable) mText, 0, length);
7829        return length > 0;
7830    }
7831
7832    /**
7833     * Adjusts selection to the word under last touch offset.
7834     * Return true if the operation was successfully performed.
7835     */
7836    private boolean selectCurrentWord() {
7837        if (!canSelectText()) {
7838            return false;
7839        }
7840
7841        if (hasPasswordTransformationMethod()) {
7842            // Always select all on a password field.
7843            // Cut/copy menu entries are not available for passwords, but being able to select all
7844            // is however useful to delete or paste to replace the entire content.
7845            return selectAll();
7846        }
7847
7848        int inputType = getInputType();
7849        int klass = inputType & InputType.TYPE_MASK_CLASS;
7850        int variation = inputType & InputType.TYPE_MASK_VARIATION;
7851
7852        // Specific text field types: select the entire text for these
7853        if (klass == InputType.TYPE_CLASS_NUMBER ||
7854                klass == InputType.TYPE_CLASS_PHONE ||
7855                klass == InputType.TYPE_CLASS_DATETIME ||
7856                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7857                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7858                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7859                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7860            return selectAll();
7861        }
7862
7863        long lastTouchOffsets = getLastTouchOffsets();
7864        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
7865        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
7866
7867        // Safety check in case standard touch event handling has been bypassed
7868        if (minOffset < 0 || minOffset >= mText.length()) return false;
7869        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
7870
7871        int selectionStart, selectionEnd;
7872
7873        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7874        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7875        if (urlSpans.length >= 1) {
7876            URLSpan urlSpan = urlSpans[0];
7877            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
7878            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
7879        } else {
7880            final WordIterator wordIterator = getWordIterator();
7881            wordIterator.setCharSequence(mText, minOffset, maxOffset);
7882
7883            selectionStart = wordIterator.getBeginning(minOffset);
7884            selectionEnd = wordIterator.getEnd(maxOffset);
7885
7886            if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE ||
7887                    selectionStart == selectionEnd) {
7888                // Possible when the word iterator does not properly handle the text's language
7889                long range = getCharRange(minOffset);
7890                selectionStart = extractRangeStartFromLong(range);
7891                selectionEnd = extractRangeEndFromLong(range);
7892            }
7893        }
7894
7895        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7896        return selectionEnd > selectionStart;
7897    }
7898
7899    /**
7900     * This is a temporary method. Future versions may support multi-locale text.
7901     *
7902     * @return The locale that should be used for a word iterator and a spell checker
7903     * in this TextView, based on the current spell checker settings,
7904     * the current IME's locale, or the system default locale.
7905     * @hide
7906     */
7907    public Locale getTextServicesLocale() {
7908        Locale locale = Locale.getDefault();
7909        final TextServicesManager textServicesManager = (TextServicesManager)
7910                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
7911        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
7912        if (subtype != null) {
7913            locale = new Locale(subtype.getLocale());
7914        }
7915        return locale;
7916    }
7917
7918    void onLocaleChanged() {
7919        // Will be re-created on demand in getWordIterator with the proper new locale
7920        getEditor().mWordIterator = null;
7921    }
7922
7923    /**
7924     * @hide
7925     */
7926    public WordIterator getWordIterator() {
7927        if (getEditor().mWordIterator == null) {
7928            getEditor().mWordIterator = new WordIterator(getTextServicesLocale());
7929        }
7930        return getEditor().mWordIterator;
7931    }
7932
7933    private long getCharRange(int offset) {
7934        final int textLength = mText.length();
7935        if (offset + 1 < textLength) {
7936            final char currentChar = mText.charAt(offset);
7937            final char nextChar = mText.charAt(offset + 1);
7938            if (Character.isSurrogatePair(currentChar, nextChar)) {
7939                return packRangeInLong(offset,  offset + 2);
7940            }
7941        }
7942        if (offset < textLength) {
7943            return packRangeInLong(offset,  offset + 1);
7944        }
7945        if (offset - 2 >= 0) {
7946            final char previousChar = mText.charAt(offset - 1);
7947            final char previousPreviousChar = mText.charAt(offset - 2);
7948            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
7949                return packRangeInLong(offset - 2,  offset);
7950            }
7951        }
7952        if (offset - 1 >= 0) {
7953            return packRangeInLong(offset - 1,  offset);
7954        }
7955        return packRangeInLong(offset,  offset);
7956    }
7957
7958    private long getLastTouchOffsets() {
7959        SelectionModifierCursorController selectionController = getSelectionController();
7960        final int minOffset = selectionController.getMinTouchOffset();
7961        final int maxOffset = selectionController.getMaxTouchOffset();
7962        return packRangeInLong(minOffset, maxOffset);
7963    }
7964
7965    @Override
7966    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
7967        super.onPopulateAccessibilityEvent(event);
7968
7969        final boolean isPassword = hasPasswordTransformationMethod();
7970        if (!isPassword) {
7971            CharSequence text = getTextForAccessibility();
7972            if (!TextUtils.isEmpty(text)) {
7973                event.getText().add(text);
7974            }
7975        }
7976    }
7977
7978    @Override
7979    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
7980        super.onInitializeAccessibilityEvent(event);
7981
7982        event.setClassName(TextView.class.getName());
7983        final boolean isPassword = hasPasswordTransformationMethod();
7984        event.setPassword(isPassword);
7985
7986        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
7987            event.setFromIndex(Selection.getSelectionStart(mText));
7988            event.setToIndex(Selection.getSelectionEnd(mText));
7989            event.setItemCount(mText.length());
7990        }
7991    }
7992
7993    @Override
7994    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
7995        super.onInitializeAccessibilityNodeInfo(info);
7996
7997        info.setClassName(TextView.class.getName());
7998        final boolean isPassword = hasPasswordTransformationMethod();
7999        info.setPassword(isPassword);
8000
8001        if (!isPassword) {
8002            info.setText(getTextForAccessibility());
8003        }
8004    }
8005
8006    @Override
8007    public void sendAccessibilityEvent(int eventType) {
8008        // Do not send scroll events since first they are not interesting for
8009        // accessibility and second such events a generated too frequently.
8010        // For details see the implementation of bringTextIntoView().
8011        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
8012            return;
8013        }
8014        super.sendAccessibilityEvent(eventType);
8015    }
8016
8017    /**
8018     * Gets the text reported for accessibility purposes. It is the
8019     * text if not empty or the hint.
8020     *
8021     * @return The accessibility text.
8022     */
8023    private CharSequence getTextForAccessibility() {
8024        CharSequence text = getText();
8025        if (TextUtils.isEmpty(text)) {
8026            text = getHint();
8027        }
8028        return text;
8029    }
8030
8031    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8032            int fromIndex, int removedCount, int addedCount) {
8033        AccessibilityEvent event =
8034            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8035        event.setFromIndex(fromIndex);
8036        event.setRemovedCount(removedCount);
8037        event.setAddedCount(addedCount);
8038        event.setBeforeText(beforeText);
8039        sendAccessibilityEventUnchecked(event);
8040    }
8041
8042    /**
8043     * Returns whether this text view is a current input method target.  The
8044     * default implementation just checks with {@link InputMethodManager}.
8045     */
8046    public boolean isInputMethodTarget() {
8047        InputMethodManager imm = InputMethodManager.peekInstance();
8048        return imm != null && imm.isActive(this);
8049    }
8050
8051    // Selection context mode
8052    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8053    private static final int ID_CUT = android.R.id.cut;
8054    private static final int ID_COPY = android.R.id.copy;
8055    private static final int ID_PASTE = android.R.id.paste;
8056
8057    /**
8058     * Called when a context menu option for the text view is selected.  Currently
8059     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
8060     * {@link android.R.id#copy} or {@link android.R.id#paste}.
8061     *
8062     * @return true if the context menu item action was performed.
8063     */
8064    public boolean onTextContextMenuItem(int id) {
8065        int min = 0;
8066        int max = mText.length();
8067
8068        if (isFocused()) {
8069            final int selStart = getSelectionStart();
8070            final int selEnd = getSelectionEnd();
8071
8072            min = Math.max(0, Math.min(selStart, selEnd));
8073            max = Math.max(0, Math.max(selStart, selEnd));
8074        }
8075
8076        switch (id) {
8077            case ID_SELECT_ALL:
8078                // This does not enter text selection mode. Text is highlighted, so that it can be
8079                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8080                selectAll();
8081                return true;
8082
8083            case ID_PASTE:
8084                paste(min, max);
8085                return true;
8086
8087            case ID_CUT:
8088                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
8089                deleteText_internal(min, max);
8090                stopSelectionActionMode();
8091                return true;
8092
8093            case ID_COPY:
8094                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
8095                stopSelectionActionMode();
8096                return true;
8097        }
8098        return false;
8099    }
8100
8101    private CharSequence getTransformedText(int start, int end) {
8102        return removeSuggestionSpans(mTransformed.subSequence(start, end));
8103    }
8104
8105    /**
8106     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8107     * by [min, max] when replacing this region by paste.
8108     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8109     * make sure we do not add an extra one from the paste content.
8110     */
8111    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8112        if (paste.length() > 0) {
8113            if (min > 0) {
8114                final char charBefore = mTransformed.charAt(min - 1);
8115                final char charAfter = paste.charAt(0);
8116
8117                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8118                    // Two spaces at beginning of paste: remove one
8119                    final int originalLength = mText.length();
8120                    deleteText_internal(min - 1, min);
8121                    // Due to filters, there is no guarantee that exactly one character was
8122                    // removed: count instead.
8123                    final int delta = mText.length() - originalLength;
8124                    min += delta;
8125                    max += delta;
8126                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8127                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8128                    // No space at beginning of paste: add one
8129                    final int originalLength = mText.length();
8130                    replaceText_internal(min, min, " ");
8131                    // Taking possible filters into account as above.
8132                    final int delta = mText.length() - originalLength;
8133                    min += delta;
8134                    max += delta;
8135                }
8136            }
8137
8138            if (max < mText.length()) {
8139                final char charBefore = paste.charAt(paste.length() - 1);
8140                final char charAfter = mTransformed.charAt(max);
8141
8142                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8143                    // Two spaces at end of paste: remove one
8144                    deleteText_internal(max, max + 1);
8145                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8146                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8147                    // No space at end of paste: add one
8148                    replaceText_internal(max, max, " ");
8149                }
8150            }
8151        }
8152
8153        return packRangeInLong(min, max);
8154    }
8155
8156    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8157        TextView shadowView = (TextView) inflate(mContext,
8158                com.android.internal.R.layout.text_drag_thumbnail, null);
8159
8160        if (shadowView == null) {
8161            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8162        }
8163
8164        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8165            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8166        }
8167        shadowView.setText(text);
8168        shadowView.setTextColor(getTextColors());
8169
8170        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8171        shadowView.setGravity(Gravity.CENTER);
8172
8173        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8174                ViewGroup.LayoutParams.WRAP_CONTENT));
8175
8176        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8177        shadowView.measure(size, size);
8178
8179        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8180        shadowView.invalidate();
8181        return new DragShadowBuilder(shadowView);
8182    }
8183
8184    @Override
8185    public boolean performLongClick() {
8186        boolean handled = false;
8187        boolean vibrate = true;
8188
8189        if (super.performLongClick()) {
8190            handled = true;
8191        }
8192
8193        // Long press in empty space moves cursor and shows the Paste affordance if available.
8194        if (!handled && mEditor != null && !isPositionOnText(getEditor().mLastDownPositionX, getEditor().mLastDownPositionY) &&
8195                getEditor().mInsertionControllerEnabled) {
8196            final int offset = getOffsetForPosition(getEditor().mLastDownPositionX, getEditor().mLastDownPositionY);
8197            stopSelectionActionMode();
8198            Selection.setSelection((Spannable) mText, offset);
8199            getInsertionController().showWithActionPopup();
8200            handled = true;
8201            vibrate = false;
8202        }
8203
8204        if (!handled && mEditor != null && getEditor().mSelectionActionMode != null) {
8205            if (touchPositionIsInSelection()) {
8206                // Start a drag
8207                final int start = getSelectionStart();
8208                final int end = getSelectionEnd();
8209                CharSequence selectedText = getTransformedText(start, end);
8210                ClipData data = ClipData.newPlainText(null, selectedText);
8211                DragLocalState localState = new DragLocalState(this, start, end);
8212                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8213                stopSelectionActionMode();
8214            } else {
8215                getSelectionController().hide();
8216                selectCurrentWord();
8217                getSelectionController().show();
8218            }
8219            handled = true;
8220        }
8221
8222        // Start a new selection
8223        if (!handled) {
8224            vibrate = handled = startSelectionActionMode();
8225        }
8226
8227        if (vibrate) {
8228            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8229        }
8230
8231        if (handled && mEditor != null) {
8232            getEditor().mDiscardNextActionUp = true;
8233        }
8234
8235        return handled;
8236    }
8237
8238    private boolean touchPositionIsInSelection() {
8239        int selectionStart = getSelectionStart();
8240        int selectionEnd = getSelectionEnd();
8241
8242        if (selectionStart == selectionEnd) {
8243            return false;
8244        }
8245
8246        if (selectionStart > selectionEnd) {
8247            int tmp = selectionStart;
8248            selectionStart = selectionEnd;
8249            selectionEnd = tmp;
8250            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8251        }
8252
8253        SelectionModifierCursorController selectionController = getSelectionController();
8254        int minOffset = selectionController.getMinTouchOffset();
8255        int maxOffset = selectionController.getMaxTouchOffset();
8256
8257        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8258    }
8259
8260    private PositionListener getPositionListener() {
8261        if (getEditor().mPositionListener == null) {
8262            getEditor().mPositionListener = new PositionListener();
8263        }
8264        return getEditor().mPositionListener;
8265    }
8266
8267    private interface TextViewPositionListener {
8268        public void updatePosition(int parentPositionX, int parentPositionY,
8269                boolean parentPositionChanged, boolean parentScrolled);
8270    }
8271
8272    private boolean isPositionVisible(int positionX, int positionY) {
8273        synchronized (TEMP_POSITION) {
8274            final float[] position = TEMP_POSITION;
8275            position[0] = positionX;
8276            position[1] = positionY;
8277            View view = this;
8278
8279            while (view != null) {
8280                if (view != this) {
8281                    // Local scroll is already taken into account in positionX/Y
8282                    position[0] -= view.getScrollX();
8283                    position[1] -= view.getScrollY();
8284                }
8285
8286                if (position[0] < 0 || position[1] < 0 ||
8287                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
8288                    return false;
8289                }
8290
8291                if (!view.getMatrix().isIdentity()) {
8292                    view.getMatrix().mapPoints(position);
8293                }
8294
8295                position[0] += view.getLeft();
8296                position[1] += view.getTop();
8297
8298                final ViewParent parent = view.getParent();
8299                if (parent instanceof View) {
8300                    view = (View) parent;
8301                } else {
8302                    // We've reached the ViewRoot, stop iterating
8303                    view = null;
8304                }
8305            }
8306        }
8307
8308        // We've been able to walk up the view hierarchy and the position was never clipped
8309        return true;
8310    }
8311
8312    private boolean isOffsetVisible(int offset) {
8313        final int line = mLayout.getLineForOffset(offset);
8314        final int lineBottom = mLayout.getLineBottom(line);
8315        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
8316        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
8317                lineBottom + viewportToContentVerticalOffset());
8318    }
8319
8320    @Override
8321    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
8322        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
8323        if (mEditor != null && getEditor().mPositionListener != null) {
8324            getEditor().mPositionListener.onScrollChanged();
8325        }
8326    }
8327
8328    /**
8329     * Removes the suggestion spans.
8330     */
8331    CharSequence removeSuggestionSpans(CharSequence text) {
8332       if (text instanceof Spanned) {
8333           Spannable spannable;
8334           if (text instanceof Spannable) {
8335               spannable = (Spannable) text;
8336           } else {
8337               spannable = new SpannableString(text);
8338               text = spannable;
8339           }
8340
8341           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
8342           for (int i = 0; i < spans.length; i++) {
8343               spannable.removeSpan(spans[i]);
8344           }
8345       }
8346       return text;
8347    }
8348
8349    void showSuggestions() {
8350        if (getEditor().mSuggestionsPopupWindow == null) {
8351            getEditor().mSuggestionsPopupWindow = new SuggestionsPopupWindow();
8352        }
8353        hideControllers();
8354        getEditor().mSuggestionsPopupWindow.show();
8355    }
8356
8357    boolean areSuggestionsShown() {
8358        return getEditor().mSuggestionsPopupWindow != null && getEditor().mSuggestionsPopupWindow.isShowing();
8359    }
8360
8361    /**
8362     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
8363     * by the IME or by the spell checker as the user types. This is done by adding
8364     * {@link SuggestionSpan}s to the text.
8365     *
8366     * When suggestions are enabled (default), this list of suggestions will be displayed when the
8367     * user asks for them on these parts of the text. This value depends on the inputType of this
8368     * TextView.
8369     *
8370     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
8371     *
8372     * In addition, the type variation must be one of
8373     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
8374     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
8375     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
8376     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
8377     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
8378     *
8379     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
8380     *
8381     * @return true if the suggestions popup window is enabled, based on the inputType.
8382     */
8383    public boolean isSuggestionsEnabled() {
8384        if (mEditor == null) return false;
8385        if ((getEditor().mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
8386        if ((getEditor().mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
8387
8388        final int variation = getEditor().mInputType & EditorInfo.TYPE_MASK_VARIATION;
8389        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
8390                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
8391                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
8392                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
8393                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
8394    }
8395
8396    /**
8397     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8398     * selection is initiated in this View.
8399     *
8400     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8401     * Paste actions, depending on what this View supports.
8402     *
8403     * A custom implementation can add new entries in the default menu in its
8404     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
8405     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
8406     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
8407     * or {@link android.R.id#paste} ids as parameters.
8408     *
8409     * Returning false from
8410     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
8411     * the action mode from being started.
8412     *
8413     * Action click events should be handled by the custom implementation of
8414     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8415     *
8416     * Note that text selection mode is not started when a TextView receives focus and the
8417     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8418     * that case, to allow for quick replacement.
8419     */
8420    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8421        createEditorIfNeeded("custom selection action mode set");
8422        getEditor().mCustomSelectionActionModeCallback = actionModeCallback;
8423    }
8424
8425    /**
8426     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8427     *
8428     * @return The current custom selection callback.
8429     */
8430    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8431        return mEditor == null ? null : getEditor().mCustomSelectionActionModeCallback;
8432    }
8433
8434    /**
8435     *
8436     * @return true if the selection mode was actually started.
8437     */
8438    private boolean startSelectionActionMode() {
8439        if (getEditor().mSelectionActionMode != null) {
8440            // Selection action mode is already started
8441            return false;
8442        }
8443
8444        if (!canSelectText() || !requestFocus()) {
8445            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8446            return false;
8447        }
8448
8449        if (!hasSelection()) {
8450            // There may already be a selection on device rotation
8451            if (!selectCurrentWord()) {
8452                // No word found under cursor or text selection not permitted.
8453                return false;
8454            }
8455        }
8456
8457        boolean willExtract = extractedTextModeWillBeStarted();
8458
8459        // Do not start the action mode when extracted text will show up full screen, which would
8460        // immediately hide the newly created action bar and would be visually distracting.
8461        if (!willExtract) {
8462            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8463            getEditor().mSelectionActionMode = startActionMode(actionModeCallback);
8464        }
8465
8466        final boolean selectionStarted = getEditor().mSelectionActionMode != null || willExtract;
8467        if (selectionStarted && !isTextSelectable()) {
8468            // Show the IME to be able to replace text, except when selecting non editable text.
8469            final InputMethodManager imm = InputMethodManager.peekInstance();
8470            if (imm != null) {
8471                imm.showSoftInput(this, 0, null);
8472            }
8473        }
8474
8475        return selectionStarted;
8476    }
8477
8478    private boolean extractedTextModeWillBeStarted() {
8479        if (!(this instanceof ExtractEditText)) {
8480            final InputMethodManager imm = InputMethodManager.peekInstance();
8481            return  imm != null && imm.isFullscreenMode();
8482        }
8483        return false;
8484    }
8485
8486    /**
8487     * @hide
8488     */
8489    protected void stopSelectionActionMode() {
8490        if (getEditor().mSelectionActionMode != null) {
8491            // This will hide the mSelectionModifierCursorController
8492            getEditor().mSelectionActionMode.finish();
8493        }
8494    }
8495
8496    /**
8497     * Paste clipboard content between min and max positions.
8498     */
8499    private void paste(int min, int max) {
8500        ClipboardManager clipboard =
8501            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8502        ClipData clip = clipboard.getPrimaryClip();
8503        if (clip != null) {
8504            boolean didFirst = false;
8505            for (int i=0; i<clip.getItemCount(); i++) {
8506                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
8507                if (paste != null) {
8508                    if (!didFirst) {
8509                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8510                        min = extractRangeStartFromLong(minMax);
8511                        max = extractRangeEndFromLong(minMax);
8512                        Selection.setSelection((Spannable) mText, max);
8513                        ((Editable) mText).replace(min, max, paste);
8514                        didFirst = true;
8515                    } else {
8516                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8517                        ((Editable) mText).insert(getSelectionEnd(), paste);
8518                    }
8519                }
8520            }
8521            stopSelectionActionMode();
8522            LAST_CUT_OR_COPY_TIME = 0;
8523        }
8524    }
8525
8526    private void setPrimaryClip(ClipData clip) {
8527        ClipboardManager clipboard = (ClipboardManager) getContext().
8528                getSystemService(Context.CLIPBOARD_SERVICE);
8529        clipboard.setPrimaryClip(clip);
8530        LAST_CUT_OR_COPY_TIME = SystemClock.uptimeMillis();
8531    }
8532
8533    private void hideInsertionPointCursorController() {
8534        // No need to create the controller to hide it.
8535        if (getEditor().mInsertionPointCursorController != null) {
8536            getEditor().mInsertionPointCursorController.hide();
8537        }
8538    }
8539
8540    /**
8541     * Hides the insertion controller and stops text selection mode, hiding the selection controller
8542     */
8543    private void hideControllers() {
8544        hideCursorControllers();
8545        hideSpanControllers();
8546    }
8547
8548    private void hideSpanControllers() {
8549        if (mChangeWatcher != null) {
8550            mChangeWatcher.hideControllers();
8551        }
8552    }
8553
8554    private void hideCursorControllers() {
8555        if (getEditor().mSuggestionsPopupWindow != null && !getEditor().mSuggestionsPopupWindow.isShowingUp()) {
8556            // Should be done before hide insertion point controller since it triggers a show of it
8557            getEditor().mSuggestionsPopupWindow.hide();
8558        }
8559        hideInsertionPointCursorController();
8560        stopSelectionActionMode();
8561    }
8562
8563    /**
8564     * Get the character offset closest to the specified absolute position. A typical use case is to
8565     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
8566     *
8567     * @param x The horizontal absolute position of a point on screen
8568     * @param y The vertical absolute position of a point on screen
8569     * @return the character offset for the character whose position is closest to the specified
8570     *  position. Returns -1 if there is no layout.
8571     */
8572    public int getOffsetForPosition(float x, float y) {
8573        if (getLayout() == null) return -1;
8574        final int line = getLineAtCoordinate(y);
8575        final int offset = getOffsetAtCoordinate(line, x);
8576        return offset;
8577    }
8578
8579    private float convertToLocalHorizontalCoordinate(float x) {
8580        x -= getTotalPaddingLeft();
8581        // Clamp the position to inside of the view.
8582        x = Math.max(0.0f, x);
8583        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
8584        x += getScrollX();
8585        return x;
8586    }
8587
8588    private int getLineAtCoordinate(float y) {
8589        y -= getTotalPaddingTop();
8590        // Clamp the position to inside of the view.
8591        y = Math.max(0.0f, y);
8592        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8593        y += getScrollY();
8594        return getLayout().getLineForVertical((int) y);
8595    }
8596
8597    private int getOffsetAtCoordinate(int line, float x) {
8598        x = convertToLocalHorizontalCoordinate(x);
8599        return getLayout().getOffsetForHorizontal(line, x);
8600    }
8601
8602    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
8603     * in the view. Returns false when the position is in the empty space of left/right of text.
8604     */
8605    private boolean isPositionOnText(float x, float y) {
8606        if (getLayout() == null) return false;
8607
8608        final int line = getLineAtCoordinate(y);
8609        x = convertToLocalHorizontalCoordinate(x);
8610
8611        if (x < getLayout().getLineLeft(line)) return false;
8612        if (x > getLayout().getLineRight(line)) return false;
8613        return true;
8614    }
8615
8616    @Override
8617    public boolean onDragEvent(DragEvent event) {
8618        switch (event.getAction()) {
8619            case DragEvent.ACTION_DRAG_STARTED:
8620                return hasInsertionController();
8621
8622            case DragEvent.ACTION_DRAG_ENTERED:
8623                TextView.this.requestFocus();
8624                return true;
8625
8626            case DragEvent.ACTION_DRAG_LOCATION:
8627                final int offset = getOffsetForPosition(event.getX(), event.getY());
8628                Selection.setSelection((Spannable)mText, offset);
8629                return true;
8630
8631            case DragEvent.ACTION_DROP:
8632                onDrop(event);
8633                return true;
8634
8635            case DragEvent.ACTION_DRAG_ENDED:
8636            case DragEvent.ACTION_DRAG_EXITED:
8637            default:
8638                return true;
8639        }
8640    }
8641
8642    private void onDrop(DragEvent event) {
8643        StringBuilder content = new StringBuilder("");
8644        ClipData clipData = event.getClipData();
8645        final int itemCount = clipData.getItemCount();
8646        for (int i=0; i < itemCount; i++) {
8647            Item item = clipData.getItemAt(i);
8648            content.append(item.coerceToText(TextView.this.mContext));
8649        }
8650
8651        final int offset = getOffsetForPosition(event.getX(), event.getY());
8652
8653        Object localState = event.getLocalState();
8654        DragLocalState dragLocalState = null;
8655        if (localState instanceof DragLocalState) {
8656            dragLocalState = (DragLocalState) localState;
8657        }
8658        boolean dragDropIntoItself = dragLocalState != null &&
8659                dragLocalState.sourceTextView == this;
8660
8661        if (dragDropIntoItself) {
8662            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
8663                // A drop inside the original selection discards the drop.
8664                return;
8665            }
8666        }
8667
8668        final int originalLength = mText.length();
8669        long minMax = prepareSpacesAroundPaste(offset, offset, content);
8670        int min = extractRangeStartFromLong(minMax);
8671        int max = extractRangeEndFromLong(minMax);
8672
8673        Selection.setSelection((Spannable) mText, max);
8674        replaceText_internal(min, max, content);
8675
8676        if (dragDropIntoItself) {
8677            int dragSourceStart = dragLocalState.start;
8678            int dragSourceEnd = dragLocalState.end;
8679            if (max <= dragSourceStart) {
8680                // Inserting text before selection has shifted positions
8681                final int shift = mText.length() - originalLength;
8682                dragSourceStart += shift;
8683                dragSourceEnd += shift;
8684            }
8685
8686            // Delete original selection
8687            deleteText_internal(dragSourceStart, dragSourceEnd);
8688
8689            // Make sure we do not leave two adjacent spaces.
8690            if ((dragSourceStart == 0 ||
8691                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
8692                    (dragSourceStart == mText.length() ||
8693                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
8694                final int pos = dragSourceStart == mText.length() ?
8695                        dragSourceStart - 1 : dragSourceStart;
8696                deleteText_internal(pos, pos + 1);
8697            }
8698        }
8699    }
8700
8701    /**
8702     * @return True if this view supports insertion handles.
8703     */
8704    boolean hasInsertionController() {
8705        return getEditor().mInsertionControllerEnabled;
8706    }
8707
8708    /**
8709     * @return True if this view supports selection handles.
8710     */
8711    boolean hasSelectionController() {
8712        return getEditor().mSelectionControllerEnabled;
8713    }
8714
8715    InsertionPointCursorController getInsertionController() {
8716        if (!getEditor().mInsertionControllerEnabled) {
8717            return null;
8718        }
8719
8720        if (getEditor().mInsertionPointCursorController == null) {
8721            getEditor().mInsertionPointCursorController = new InsertionPointCursorController();
8722
8723            final ViewTreeObserver observer = getViewTreeObserver();
8724            observer.addOnTouchModeChangeListener(getEditor().mInsertionPointCursorController);
8725        }
8726
8727        return getEditor().mInsertionPointCursorController;
8728    }
8729
8730    SelectionModifierCursorController getSelectionController() {
8731        if (!getEditor().mSelectionControllerEnabled) {
8732            return null;
8733        }
8734
8735        if (getEditor().mSelectionModifierCursorController == null) {
8736            getEditor().mSelectionModifierCursorController = new SelectionModifierCursorController();
8737
8738            final ViewTreeObserver observer = getViewTreeObserver();
8739            observer.addOnTouchModeChangeListener(getEditor().mSelectionModifierCursorController);
8740        }
8741
8742        return getEditor().mSelectionModifierCursorController;
8743    }
8744
8745    boolean isInBatchEditMode() {
8746        if (mEditor == null) return false;
8747        final InputMethodState ims = getEditor().mInputMethodState;
8748        if (ims != null) {
8749            return ims.mBatchEditNesting > 0;
8750        }
8751        return getEditor().mInBatchEditControllers;
8752    }
8753
8754    @Override
8755    public void onResolveTextDirection() {
8756        if (hasPasswordTransformationMethod()) {
8757            mTextDir = TextDirectionHeuristics.LOCALE;
8758            return;
8759        }
8760
8761        // Always need to resolve layout direction first
8762        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
8763
8764        // Now, we can select the heuristic
8765        int textDir = getResolvedTextDirection();
8766        switch (textDir) {
8767            default:
8768            case TEXT_DIRECTION_FIRST_STRONG:
8769                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
8770                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
8771                break;
8772            case TEXT_DIRECTION_ANY_RTL:
8773                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
8774                break;
8775            case TEXT_DIRECTION_LTR:
8776                mTextDir = TextDirectionHeuristics.LTR;
8777                break;
8778            case TEXT_DIRECTION_RTL:
8779                mTextDir = TextDirectionHeuristics.RTL;
8780                break;
8781            case TEXT_DIRECTION_LOCALE:
8782                mTextDir = TextDirectionHeuristics.LOCALE;
8783                break;
8784        }
8785    }
8786
8787    /**
8788     * Subclasses will need to override this method to implement their own way of resolving
8789     * drawables depending on the layout direction.
8790     *
8791     * A call to the super method will be required from the subclasses implementation.
8792     */
8793    protected void resolveDrawables() {
8794        // No need to resolve twice
8795        if (mResolvedDrawables) {
8796            return;
8797        }
8798        // No drawable to resolve
8799        if (mDrawables == null) {
8800            return;
8801        }
8802        // No relative drawable to resolve
8803        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
8804            mResolvedDrawables = true;
8805            return;
8806        }
8807
8808        Drawables dr = mDrawables;
8809        switch(getResolvedLayoutDirection()) {
8810            case LAYOUT_DIRECTION_RTL:
8811                if (dr.mDrawableStart != null) {
8812                    dr.mDrawableRight = dr.mDrawableStart;
8813
8814                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
8815                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
8816                }
8817                if (dr.mDrawableEnd != null) {
8818                    dr.mDrawableLeft = dr.mDrawableEnd;
8819
8820                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
8821                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
8822                }
8823                break;
8824
8825            case LAYOUT_DIRECTION_LTR:
8826            default:
8827                if (dr.mDrawableStart != null) {
8828                    dr.mDrawableLeft = dr.mDrawableStart;
8829
8830                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
8831                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
8832                }
8833                if (dr.mDrawableEnd != null) {
8834                    dr.mDrawableRight = dr.mDrawableEnd;
8835
8836                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
8837                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
8838                }
8839                break;
8840        }
8841        mResolvedDrawables = true;
8842    }
8843
8844    protected void resetResolvedDrawables() {
8845        mResolvedDrawables = false;
8846    }
8847
8848    /**
8849     * @hide
8850     */
8851    protected void viewClicked(InputMethodManager imm) {
8852        if (imm != null) {
8853            imm.viewClicked(this);
8854        }
8855    }
8856
8857    /**
8858     * Deletes the range of text [start, end[.
8859     * @hide
8860     */
8861    protected void deleteText_internal(int start, int end) {
8862        ((Editable) mText).delete(start, end);
8863    }
8864
8865    /**
8866     * Replaces the range of text [start, end[ by replacement text
8867     * @hide
8868     */
8869    protected void replaceText_internal(int start, int end, CharSequence text) {
8870        ((Editable) mText).replace(start, end, text);
8871    }
8872
8873    /**
8874     * Sets a span on the specified range of text
8875     * @hide
8876     */
8877    protected void setSpan_internal(Object span, int start, int end, int flags) {
8878        ((Editable) mText).setSpan(span, start, end, flags);
8879    }
8880
8881    /**
8882     * Moves the cursor to the specified offset position in text
8883     * @hide
8884     */
8885    protected void setCursorPosition_internal(int start, int end) {
8886        Selection.setSelection(((Editable) mText), start, end);
8887    }
8888
8889    /**
8890     * An Editor should be created as soon as any of the editable-specific fields (grouped
8891     * inside the Editor object) is assigned to a non-default value.
8892     * This method will create the Editor if needed.
8893     *
8894     * A standard TextView (as well as buttons, checkboxes...) should not qualify and hence will
8895     * have a null Editor, unlike an EditText. Inconsistent in-between states will have an
8896     * Editor for backward compatibility, as soon as one of these fields is assigned.
8897     *
8898     * Also note that for performance reasons, the mEditor is created when needed, but not
8899     * reset when no more edit-specific fields are needed.
8900     */
8901    private void createEditorIfNeeded(String reason) {
8902        if (mEditor == null) {
8903            if (!(this instanceof EditText)) {
8904                Log.e(LOG_TAG + " EDITOR", "Creating Editor on TextView. " + reason);
8905            }
8906            mEditor = new Editor();
8907        } else {
8908            if (!(this instanceof EditText)) {
8909                Log.d(LOG_TAG + " EDITOR", "Redundant Editor creation. " + reason);
8910            }
8911        }
8912    }
8913
8914    private Editor getEditor() {
8915        if (mEditor == null) {
8916            //createEditorIfNeeded("Problem: mEditor is not initialized!");
8917            Log.e(LOG_TAG, "mEditor not initialized. Please send a bug report to debunne@");
8918        }
8919        return mEditor;
8920    }
8921
8922    /**
8923     * User interface state that is stored by TextView for implementing
8924     * {@link View#onSaveInstanceState}.
8925     */
8926    public static class SavedState extends BaseSavedState {
8927        int selStart;
8928        int selEnd;
8929        CharSequence text;
8930        boolean frozenWithFocus;
8931        CharSequence error;
8932
8933        SavedState(Parcelable superState) {
8934            super(superState);
8935        }
8936
8937        @Override
8938        public void writeToParcel(Parcel out, int flags) {
8939            super.writeToParcel(out, flags);
8940            out.writeInt(selStart);
8941            out.writeInt(selEnd);
8942            out.writeInt(frozenWithFocus ? 1 : 0);
8943            TextUtils.writeToParcel(text, out, flags);
8944
8945            if (error == null) {
8946                out.writeInt(0);
8947            } else {
8948                out.writeInt(1);
8949                TextUtils.writeToParcel(error, out, flags);
8950            }
8951        }
8952
8953        @Override
8954        public String toString() {
8955            String str = "TextView.SavedState{"
8956                    + Integer.toHexString(System.identityHashCode(this))
8957                    + " start=" + selStart + " end=" + selEnd;
8958            if (text != null) {
8959                str += " text=" + text;
8960            }
8961            return str + "}";
8962        }
8963
8964        @SuppressWarnings("hiding")
8965        public static final Parcelable.Creator<SavedState> CREATOR
8966                = new Parcelable.Creator<SavedState>() {
8967            public SavedState createFromParcel(Parcel in) {
8968                return new SavedState(in);
8969            }
8970
8971            public SavedState[] newArray(int size) {
8972                return new SavedState[size];
8973            }
8974        };
8975
8976        private SavedState(Parcel in) {
8977            super(in);
8978            selStart = in.readInt();
8979            selEnd = in.readInt();
8980            frozenWithFocus = (in.readInt() != 0);
8981            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
8982
8983            if (in.readInt() != 0) {
8984                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
8985            }
8986        }
8987    }
8988
8989    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
8990        private char[] mChars;
8991        private int mStart, mLength;
8992
8993        public CharWrapper(char[] chars, int start, int len) {
8994            mChars = chars;
8995            mStart = start;
8996            mLength = len;
8997        }
8998
8999        /* package */ void set(char[] chars, int start, int len) {
9000            mChars = chars;
9001            mStart = start;
9002            mLength = len;
9003        }
9004
9005        public int length() {
9006            return mLength;
9007        }
9008
9009        public char charAt(int off) {
9010            return mChars[off + mStart];
9011        }
9012
9013        @Override
9014        public String toString() {
9015            return new String(mChars, mStart, mLength);
9016        }
9017
9018        public CharSequence subSequence(int start, int end) {
9019            if (start < 0 || end < 0 || start > mLength || end > mLength) {
9020                throw new IndexOutOfBoundsException(start + ", " + end);
9021            }
9022
9023            return new String(mChars, start + mStart, end - start);
9024        }
9025
9026        public void getChars(int start, int end, char[] buf, int off) {
9027            if (start < 0 || end < 0 || start > mLength || end > mLength) {
9028                throw new IndexOutOfBoundsException(start + ", " + end);
9029            }
9030
9031            System.arraycopy(mChars, start + mStart, buf, off, end - start);
9032        }
9033
9034        public void drawText(Canvas c, int start, int end,
9035                             float x, float y, Paint p) {
9036            c.drawText(mChars, start + mStart, end - start, x, y, p);
9037        }
9038
9039        public void drawTextRun(Canvas c, int start, int end,
9040                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
9041            int count = end - start;
9042            int contextCount = contextEnd - contextStart;
9043            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
9044                    contextCount, x, y, flags, p);
9045        }
9046
9047        public float measureText(int start, int end, Paint p) {
9048            return p.measureText(mChars, start + mStart, end - start);
9049        }
9050
9051        public int getTextWidths(int start, int end, float[] widths, Paint p) {
9052            return p.getTextWidths(mChars, start + mStart, end - start, widths);
9053        }
9054
9055        public float getTextRunAdvances(int start, int end, int contextStart,
9056                int contextEnd, int flags, float[] advances, int advancesIndex,
9057                Paint p) {
9058            int count = end - start;
9059            int contextCount = contextEnd - contextStart;
9060            return p.getTextRunAdvances(mChars, start + mStart, count,
9061                    contextStart + mStart, contextCount, flags, advances,
9062                    advancesIndex);
9063        }
9064
9065        public float getTextRunAdvances(int start, int end, int contextStart,
9066                int contextEnd, int flags, float[] advances, int advancesIndex,
9067                Paint p, int reserved) {
9068            int count = end - start;
9069            int contextCount = contextEnd - contextStart;
9070            return p.getTextRunAdvances(mChars, start + mStart, count,
9071                    contextStart + mStart, contextCount, flags, advances,
9072                    advancesIndex, reserved);
9073        }
9074
9075        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
9076                int offset, int cursorOpt, Paint p) {
9077            int contextCount = contextEnd - contextStart;
9078            return p.getTextRunCursor(mChars, contextStart + mStart,
9079                    contextCount, flags, offset + mStart, cursorOpt);
9080        }
9081    }
9082
9083    private static class ErrorPopup extends PopupWindow {
9084        private boolean mAbove = false;
9085        private final TextView mView;
9086        private int mPopupInlineErrorBackgroundId = 0;
9087        private int mPopupInlineErrorAboveBackgroundId = 0;
9088
9089        ErrorPopup(TextView v, int width, int height) {
9090            super(v, width, height);
9091            mView = v;
9092            // Make sure the TextView has a background set as it will be used the first time it is
9093            // shown and positionned. Initialized with below background, which should have
9094            // dimensions identical to the above version for this to work (and is more likely).
9095            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
9096                    com.android.internal.R.styleable.Theme_errorMessageBackground);
9097            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
9098        }
9099
9100        void fixDirection(boolean above) {
9101            mAbove = above;
9102
9103            if (above) {
9104                mPopupInlineErrorAboveBackgroundId =
9105                    getResourceId(mPopupInlineErrorAboveBackgroundId,
9106                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
9107            } else {
9108                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
9109                        com.android.internal.R.styleable.Theme_errorMessageBackground);
9110            }
9111
9112            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
9113                mPopupInlineErrorBackgroundId);
9114        }
9115
9116        private int getResourceId(int currentId, int index) {
9117            if (currentId == 0) {
9118                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
9119                        R.styleable.Theme);
9120                currentId = styledAttributes.getResourceId(index, 0);
9121                styledAttributes.recycle();
9122            }
9123            return currentId;
9124        }
9125
9126        @Override
9127        public void update(int x, int y, int w, int h, boolean force) {
9128            super.update(x, y, w, h, force);
9129
9130            boolean above = isAboveAnchor();
9131            if (above != mAbove) {
9132                fixDirection(above);
9133            }
9134        }
9135    }
9136
9137    private class CorrectionHighlighter {
9138        private final Path mPath = new Path();
9139        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
9140        private int mStart, mEnd;
9141        private long mFadingStartTime;
9142        private final static int FADE_OUT_DURATION = 400;
9143
9144        public CorrectionHighlighter() {
9145            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
9146            mPaint.setStyle(Paint.Style.FILL);
9147        }
9148
9149        public void highlight(CorrectionInfo info) {
9150            mStart = info.getOffset();
9151            mEnd = mStart + info.getNewText().length();
9152            mFadingStartTime = SystemClock.uptimeMillis();
9153
9154            if (mStart < 0 || mEnd < 0) {
9155                stopAnimation();
9156            }
9157        }
9158
9159        public void draw(Canvas canvas, int cursorOffsetVertical) {
9160            if (updatePath() && updatePaint()) {
9161                if (cursorOffsetVertical != 0) {
9162                    canvas.translate(0, cursorOffsetVertical);
9163                }
9164
9165                canvas.drawPath(mPath, mPaint);
9166
9167                if (cursorOffsetVertical != 0) {
9168                    canvas.translate(0, -cursorOffsetVertical);
9169                }
9170                invalidate(true); // TODO invalidate cursor region only
9171            } else {
9172                stopAnimation();
9173                invalidate(false); // TODO invalidate cursor region only
9174            }
9175        }
9176
9177        private boolean updatePaint() {
9178            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
9179            if (duration > FADE_OUT_DURATION) return false;
9180
9181            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
9182            final int highlightColorAlpha = Color.alpha(mHighlightColor);
9183            final int color = (mHighlightColor & 0x00FFFFFF) +
9184                    ((int) (highlightColorAlpha * coef) << 24);
9185            mPaint.setColor(color);
9186            return true;
9187        }
9188
9189        private boolean updatePath() {
9190            final Layout layout = TextView.this.mLayout;
9191            if (layout == null) return false;
9192
9193            // Update in case text is edited while the animation is run
9194            final int length = mText.length();
9195            int start = Math.min(length, mStart);
9196            int end = Math.min(length, mEnd);
9197
9198            mPath.reset();
9199            TextView.this.mLayout.getSelectionPath(start, end, mPath);
9200            return true;
9201        }
9202
9203        private void invalidate(boolean delayed) {
9204            if (TextView.this.mLayout == null) return;
9205
9206            synchronized (TEMP_RECTF) {
9207                mPath.computeBounds(TEMP_RECTF, false);
9208
9209                int left = getCompoundPaddingLeft();
9210                int top = getExtendedPaddingTop() + getVerticalOffset(true);
9211
9212                if (delayed) {
9213                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
9214                            left + (int) TEMP_RECTF.left, top + (int) TEMP_RECTF.top,
9215                            left + (int) TEMP_RECTF.right, top + (int) TEMP_RECTF.bottom);
9216                } else {
9217                    TextView.this.postInvalidate((int) TEMP_RECTF.left, (int) TEMP_RECTF.top,
9218                            (int) TEMP_RECTF.right, (int) TEMP_RECTF.bottom);
9219                }
9220            }
9221        }
9222
9223        private void stopAnimation() {
9224            TextView.this.getEditor().mCorrectionHighlighter = null;
9225        }
9226    }
9227
9228    private static final class Marquee extends Handler {
9229        // TODO: Add an option to configure this
9230        private static final float MARQUEE_DELTA_MAX = 0.07f;
9231        private static final int MARQUEE_DELAY = 1200;
9232        private static final int MARQUEE_RESTART_DELAY = 1200;
9233        private static final int MARQUEE_RESOLUTION = 1000 / 30;
9234        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
9235
9236        private static final byte MARQUEE_STOPPED = 0x0;
9237        private static final byte MARQUEE_STARTING = 0x1;
9238        private static final byte MARQUEE_RUNNING = 0x2;
9239
9240        private static final int MESSAGE_START = 0x1;
9241        private static final int MESSAGE_TICK = 0x2;
9242        private static final int MESSAGE_RESTART = 0x3;
9243
9244        private final WeakReference<TextView> mView;
9245
9246        private byte mStatus = MARQUEE_STOPPED;
9247        private final float mScrollUnit;
9248        private float mMaxScroll;
9249        float mMaxFadeScroll;
9250        private float mGhostStart;
9251        private float mGhostOffset;
9252        private float mFadeStop;
9253        private int mRepeatLimit;
9254
9255        float mScroll;
9256
9257        Marquee(TextView v) {
9258            final float density = v.getContext().getResources().getDisplayMetrics().density;
9259            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
9260            mView = new WeakReference<TextView>(v);
9261        }
9262
9263        @Override
9264        public void handleMessage(Message msg) {
9265            switch (msg.what) {
9266                case MESSAGE_START:
9267                    mStatus = MARQUEE_RUNNING;
9268                    tick();
9269                    break;
9270                case MESSAGE_TICK:
9271                    tick();
9272                    break;
9273                case MESSAGE_RESTART:
9274                    if (mStatus == MARQUEE_RUNNING) {
9275                        if (mRepeatLimit >= 0) {
9276                            mRepeatLimit--;
9277                        }
9278                        start(mRepeatLimit);
9279                    }
9280                    break;
9281            }
9282        }
9283
9284        void tick() {
9285            if (mStatus != MARQUEE_RUNNING) {
9286                return;
9287            }
9288
9289            removeMessages(MESSAGE_TICK);
9290
9291            final TextView textView = mView.get();
9292            if (textView != null && (textView.isFocused() || textView.isSelected())) {
9293                mScroll += mScrollUnit;
9294                if (mScroll > mMaxScroll) {
9295                    mScroll = mMaxScroll;
9296                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
9297                } else {
9298                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
9299                }
9300                textView.invalidate();
9301            }
9302        }
9303
9304        void stop() {
9305            mStatus = MARQUEE_STOPPED;
9306            removeMessages(MESSAGE_START);
9307            removeMessages(MESSAGE_RESTART);
9308            removeMessages(MESSAGE_TICK);
9309            resetScroll();
9310        }
9311
9312        private void resetScroll() {
9313            mScroll = 0.0f;
9314            final TextView textView = mView.get();
9315            if (textView != null) textView.invalidate();
9316        }
9317
9318        void start(int repeatLimit) {
9319            if (repeatLimit == 0) {
9320                stop();
9321                return;
9322            }
9323            mRepeatLimit = repeatLimit;
9324            final TextView textView = mView.get();
9325            if (textView != null && textView.mLayout != null) {
9326                mStatus = MARQUEE_STARTING;
9327                mScroll = 0.0f;
9328                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
9329                        textView.getCompoundPaddingRight();
9330                final float lineWidth = textView.mLayout.getLineWidth(0);
9331                final float gap = textWidth / 3.0f;
9332                mGhostStart = lineWidth - textWidth + gap;
9333                mMaxScroll = mGhostStart + textWidth;
9334                mGhostOffset = lineWidth + gap;
9335                mFadeStop = lineWidth + textWidth / 6.0f;
9336                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
9337
9338                textView.invalidate();
9339                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
9340            }
9341        }
9342
9343        float getGhostOffset() {
9344            return mGhostOffset;
9345        }
9346
9347        boolean shouldDrawLeftFade() {
9348            return mScroll <= mFadeStop;
9349        }
9350
9351        boolean shouldDrawGhost() {
9352            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
9353        }
9354
9355        boolean isRunning() {
9356            return mStatus == MARQUEE_RUNNING;
9357        }
9358
9359        boolean isStopped() {
9360            return mStatus == MARQUEE_STOPPED;
9361        }
9362    }
9363
9364    /**
9365     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
9366     * pop-up should be displayed.
9367     */
9368    private class EasyEditSpanController {
9369
9370        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
9371
9372        private EasyEditPopupWindow mPopupWindow;
9373
9374        private EasyEditSpan mEasyEditSpan;
9375
9376        private Runnable mHidePopup;
9377
9378        private void hide() {
9379            if (mPopupWindow != null) {
9380                mPopupWindow.hide();
9381                TextView.this.removeCallbacks(mHidePopup);
9382            }
9383            removeSpans(mText);
9384            mEasyEditSpan = null;
9385        }
9386
9387        /**
9388         * Monitors the changes in the text.
9389         *
9390         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
9391         * as the notifications are not sent when a spannable (with spans) is inserted.
9392         */
9393        public void onTextChange(CharSequence buffer) {
9394            adjustSpans(mText);
9395
9396            if (getWindowVisibility() != View.VISIBLE) {
9397                // The window is not visible yet, ignore the text change.
9398                return;
9399            }
9400
9401            if (mLayout == null) {
9402                // The view has not been layout yet, ignore the text change
9403                return;
9404            }
9405
9406            InputMethodManager imm = InputMethodManager.peekInstance();
9407            if (!(TextView.this instanceof ExtractEditText)
9408                    && imm != null && imm.isFullscreenMode()) {
9409                // The input is in extract mode. We do not have to handle the easy edit in the
9410                // original TextView, as the ExtractEditText will do
9411                return;
9412            }
9413
9414            // Remove the current easy edit span, as the text changed, and remove the pop-up
9415            // (if any)
9416            if (mEasyEditSpan != null) {
9417                if (mText instanceof Spannable) {
9418                    ((Spannable) mText).removeSpan(mEasyEditSpan);
9419                }
9420                mEasyEditSpan = null;
9421            }
9422            if (mPopupWindow != null && mPopupWindow.isShowing()) {
9423                mPopupWindow.hide();
9424            }
9425
9426            // Display the new easy edit span (if any).
9427            if (buffer instanceof Spanned) {
9428                mEasyEditSpan = getSpan((Spanned) buffer);
9429                if (mEasyEditSpan != null) {
9430                    if (mPopupWindow == null) {
9431                        mPopupWindow = new EasyEditPopupWindow();
9432                        mHidePopup = new Runnable() {
9433                            @Override
9434                            public void run() {
9435                                hide();
9436                            }
9437                        };
9438                    }
9439                    mPopupWindow.show(mEasyEditSpan);
9440                    TextView.this.removeCallbacks(mHidePopup);
9441                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
9442                }
9443            }
9444        }
9445
9446        /**
9447         * Adjusts the spans by removing all of them except the last one.
9448         */
9449        private void adjustSpans(CharSequence buffer) {
9450            // This method enforces that only one easy edit span is attached to the text.
9451            // A better way to enforce this would be to listen for onSpanAdded, but this method
9452            // cannot be used in this scenario as no notification is triggered when a text with
9453            // spans is inserted into a text.
9454            if (buffer instanceof Spannable) {
9455                Spannable spannable = (Spannable) buffer;
9456                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
9457                        EasyEditSpan.class);
9458                for (int i = 0; i < spans.length - 1; i++) {
9459                    spannable.removeSpan(spans[i]);
9460                }
9461            }
9462        }
9463
9464        /**
9465         * Removes all the {@link EasyEditSpan} currently attached.
9466         */
9467        private void removeSpans(CharSequence buffer) {
9468            if (buffer instanceof Spannable) {
9469                Spannable spannable = (Spannable) buffer;
9470                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
9471                        EasyEditSpan.class);
9472                for (int i = 0; i < spans.length; i++) {
9473                    spannable.removeSpan(spans[i]);
9474                }
9475            }
9476        }
9477
9478        private EasyEditSpan getSpan(Spanned spanned) {
9479            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
9480                    EasyEditSpan.class);
9481            if (easyEditSpans.length == 0) {
9482                return null;
9483            } else {
9484                return easyEditSpans[0];
9485            }
9486        }
9487    }
9488
9489    /**
9490     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
9491     * by {@link EasyEditSpanController}.
9492     */
9493    private class EasyEditPopupWindow extends PinnedPopupWindow
9494            implements OnClickListener {
9495        private static final int POPUP_TEXT_LAYOUT =
9496                com.android.internal.R.layout.text_edit_action_popup_text;
9497        private TextView mDeleteTextView;
9498        private EasyEditSpan mEasyEditSpan;
9499
9500        @Override
9501        protected void createPopupWindow() {
9502            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9503                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9504            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9505            mPopupWindow.setClippingEnabled(true);
9506        }
9507
9508        @Override
9509        protected void initContentView() {
9510            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
9511            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
9512            mContentView = linearLayout;
9513            mContentView.setBackgroundResource(
9514                    com.android.internal.R.drawable.text_edit_side_paste_window);
9515
9516            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9517                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9518
9519            LayoutParams wrapContent = new LayoutParams(
9520                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
9521
9522            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9523            mDeleteTextView.setLayoutParams(wrapContent);
9524            mDeleteTextView.setText(com.android.internal.R.string.delete);
9525            mDeleteTextView.setOnClickListener(this);
9526            mContentView.addView(mDeleteTextView);
9527        }
9528
9529        public void show(EasyEditSpan easyEditSpan) {
9530            mEasyEditSpan = easyEditSpan;
9531            super.show();
9532        }
9533
9534        @Override
9535        public void onClick(View view) {
9536            if (view == mDeleteTextView) {
9537                Editable editable = (Editable) mText;
9538                int start = editable.getSpanStart(mEasyEditSpan);
9539                int end = editable.getSpanEnd(mEasyEditSpan);
9540                if (start >= 0 && end >= 0) {
9541                    deleteText_internal(start, end);
9542                }
9543            }
9544        }
9545
9546        @Override
9547        protected int getTextOffset() {
9548            // Place the pop-up at the end of the span
9549            Editable editable = (Editable) mText;
9550            return editable.getSpanEnd(mEasyEditSpan);
9551        }
9552
9553        @Override
9554        protected int getVerticalLocalPosition(int line) {
9555            return mLayout.getLineBottom(line);
9556        }
9557
9558        @Override
9559        protected int clipVertically(int positionY) {
9560            // As we display the pop-up below the span, no vertical clipping is required.
9561            return positionY;
9562        }
9563    }
9564
9565    private class ChangeWatcher implements TextWatcher, SpanWatcher {
9566
9567        private CharSequence mBeforeText;
9568
9569        private EasyEditSpanController mEasyEditSpanController;
9570
9571        private ChangeWatcher() {
9572            mEasyEditSpanController = new EasyEditSpanController();
9573        }
9574
9575        public void beforeTextChanged(CharSequence buffer, int start,
9576                                      int before, int after) {
9577            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
9578                    + " before=" + before + " after=" + after + ": " + buffer);
9579
9580            if (AccessibilityManager.getInstance(mContext).isEnabled()
9581                    && !isPasswordInputType(getInputType())
9582                    && !hasPasswordTransformationMethod()) {
9583                mBeforeText = buffer.toString();
9584            }
9585
9586            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
9587        }
9588
9589        public void onTextChanged(CharSequence buffer, int start,
9590                                  int before, int after) {
9591            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
9592                    + " before=" + before + " after=" + after + ": " + buffer);
9593            TextView.this.handleTextChanged(buffer, start, before, after);
9594
9595            mEasyEditSpanController.onTextChange(buffer);
9596
9597            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
9598                    (isFocused() || isSelected() && isShown())) {
9599                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
9600                mBeforeText = null;
9601            }
9602        }
9603
9604        public void afterTextChanged(Editable buffer) {
9605            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
9606            TextView.this.sendAfterTextChanged(buffer);
9607
9608            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
9609                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
9610            }
9611        }
9612
9613        public void onSpanChanged(Spannable buf,
9614                                  Object what, int s, int e, int st, int en) {
9615            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
9616                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
9617            TextView.this.spanChange(buf, what, s, st, e, en);
9618        }
9619
9620        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
9621            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
9622                    + " what=" + what + ": " + buf);
9623            TextView.this.spanChange(buf, what, -1, s, -1, e);
9624        }
9625
9626        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
9627            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
9628                    + " what=" + what + ": " + buf);
9629            TextView.this.spanChange(buf, what, s, -1, e, -1);
9630        }
9631
9632        private void hideControllers() {
9633            mEasyEditSpanController.hide();
9634        }
9635    }
9636
9637    private static class Blink extends Handler implements Runnable {
9638        private final WeakReference<TextView> mView;
9639        private boolean mCancelled;
9640
9641        public Blink(TextView v) {
9642            mView = new WeakReference<TextView>(v);
9643        }
9644
9645        public void run() {
9646            if (mCancelled) {
9647                return;
9648            }
9649
9650            removeCallbacks(Blink.this);
9651
9652            TextView tv = mView.get();
9653
9654            if (tv != null && tv.shouldBlink()) {
9655                if (tv.mLayout != null) {
9656                    tv.invalidateCursorPath();
9657                }
9658
9659                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
9660            }
9661        }
9662
9663        void cancel() {
9664            if (!mCancelled) {
9665                removeCallbacks(Blink.this);
9666                mCancelled = true;
9667            }
9668        }
9669
9670        void uncancel() {
9671            mCancelled = false;
9672        }
9673    }
9674
9675    private static class DragLocalState {
9676        public TextView sourceTextView;
9677        public int start, end;
9678
9679        public DragLocalState(TextView sourceTextView, int start, int end) {
9680            this.sourceTextView = sourceTextView;
9681            this.start = start;
9682            this.end = end;
9683        }
9684    }
9685
9686    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9687        // 3 handles
9688        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9689        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9690        private TextViewPositionListener[] mPositionListeners =
9691                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9692        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9693        private boolean mPositionHasChanged = true;
9694        // Absolute position of the TextView with respect to its parent window
9695        private int mPositionX, mPositionY;
9696        private int mNumberOfListeners;
9697        private boolean mScrollHasChanged;
9698        final int[] mTempCoords = new int[2];
9699
9700        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9701            if (mNumberOfListeners == 0) {
9702                updatePosition();
9703                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9704                vto.addOnPreDrawListener(this);
9705            }
9706
9707            int emptySlotIndex = -1;
9708            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9709                TextViewPositionListener listener = mPositionListeners[i];
9710                if (listener == positionListener) {
9711                    return;
9712                } else if (emptySlotIndex < 0 && listener == null) {
9713                    emptySlotIndex = i;
9714                }
9715            }
9716
9717            mPositionListeners[emptySlotIndex] = positionListener;
9718            mCanMove[emptySlotIndex] = canMove;
9719            mNumberOfListeners++;
9720        }
9721
9722        public void removeSubscriber(TextViewPositionListener positionListener) {
9723            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9724                if (mPositionListeners[i] == positionListener) {
9725                    mPositionListeners[i] = null;
9726                    mNumberOfListeners--;
9727                    break;
9728                }
9729            }
9730
9731            if (mNumberOfListeners == 0) {
9732                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9733                vto.removeOnPreDrawListener(this);
9734            }
9735        }
9736
9737        public int getPositionX() {
9738            return mPositionX;
9739        }
9740
9741        public int getPositionY() {
9742            return mPositionY;
9743        }
9744
9745        @Override
9746        public boolean onPreDraw() {
9747            updatePosition();
9748
9749            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9750                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9751                    TextViewPositionListener positionListener = mPositionListeners[i];
9752                    if (positionListener != null) {
9753                        positionListener.updatePosition(mPositionX, mPositionY,
9754                                mPositionHasChanged, mScrollHasChanged);
9755                    }
9756                }
9757            }
9758
9759            mScrollHasChanged = false;
9760            return true;
9761        }
9762
9763        private void updatePosition() {
9764            TextView.this.getLocationInWindow(mTempCoords);
9765
9766            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9767
9768            mPositionX = mTempCoords[0];
9769            mPositionY = mTempCoords[1];
9770        }
9771
9772        public void onScrollChanged() {
9773            mScrollHasChanged = true;
9774        }
9775    }
9776
9777    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9778        protected PopupWindow mPopupWindow;
9779        protected ViewGroup mContentView;
9780        int mPositionX, mPositionY;
9781
9782        protected abstract void createPopupWindow();
9783        protected abstract void initContentView();
9784        protected abstract int getTextOffset();
9785        protected abstract int getVerticalLocalPosition(int line);
9786        protected abstract int clipVertically(int positionY);
9787
9788        public PinnedPopupWindow() {
9789            createPopupWindow();
9790
9791            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9792            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9793            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9794
9795            initContentView();
9796
9797            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9798                    ViewGroup.LayoutParams.WRAP_CONTENT);
9799            mContentView.setLayoutParams(wrapContent);
9800
9801            mPopupWindow.setContentView(mContentView);
9802        }
9803
9804        public void show() {
9805            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9806
9807            computeLocalPosition();
9808
9809            final PositionListener positionListener = TextView.this.getPositionListener();
9810            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9811        }
9812
9813        protected void measureContent() {
9814            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9815            mContentView.measure(
9816                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9817                            View.MeasureSpec.AT_MOST),
9818                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9819                            View.MeasureSpec.AT_MOST));
9820        }
9821
9822        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9823         * positioned according to viewportToContentHorizontalOffset.
9824         *
9825         * This method assumes that mContentView has properly been measured from its content. */
9826        private void computeLocalPosition() {
9827            measureContent();
9828            final int width = mContentView.getMeasuredWidth();
9829            final int offset = getTextOffset();
9830            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9831            mPositionX += viewportToContentHorizontalOffset();
9832
9833            final int line = mLayout.getLineForOffset(offset);
9834            mPositionY = getVerticalLocalPosition(line);
9835            mPositionY += viewportToContentVerticalOffset();
9836        }
9837
9838        private void updatePosition(int parentPositionX, int parentPositionY) {
9839            int positionX = parentPositionX + mPositionX;
9840            int positionY = parentPositionY + mPositionY;
9841
9842            positionY = clipVertically(positionY);
9843
9844            // Horizontal clipping
9845            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9846            final int width = mContentView.getMeasuredWidth();
9847            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9848            positionX = Math.max(0, positionX);
9849
9850            if (isShowing()) {
9851                mPopupWindow.update(positionX, positionY, -1, -1);
9852            } else {
9853                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9854                        positionX, positionY);
9855            }
9856        }
9857
9858        public void hide() {
9859            mPopupWindow.dismiss();
9860            TextView.this.getPositionListener().removeSubscriber(this);
9861        }
9862
9863        @Override
9864        public void updatePosition(int parentPositionX, int parentPositionY,
9865                boolean parentPositionChanged, boolean parentScrolled) {
9866            // Either parentPositionChanged or parentScrolled is true, check if still visible
9867            if (isShowing() && isOffsetVisible(getTextOffset())) {
9868                if (parentScrolled) computeLocalPosition();
9869                updatePosition(parentPositionX, parentPositionY);
9870            } else {
9871                hide();
9872            }
9873        }
9874
9875        public boolean isShowing() {
9876            return mPopupWindow.isShowing();
9877        }
9878    }
9879
9880    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9881        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9882        private static final int ADD_TO_DICTIONARY = -1;
9883        private static final int DELETE_TEXT = -2;
9884        private SuggestionInfo[] mSuggestionInfos;
9885        private int mNumberOfSuggestions;
9886        private boolean mCursorWasVisibleBeforeSuggestions;
9887        private boolean mIsShowingUp = false;
9888        private SuggestionAdapter mSuggestionsAdapter;
9889        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9890        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9891
9892        private class CustomPopupWindow extends PopupWindow {
9893            public CustomPopupWindow(Context context, int defStyle) {
9894                super(context, null, defStyle);
9895            }
9896
9897            @Override
9898            public void dismiss() {
9899                super.dismiss();
9900
9901                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9902
9903                // Safe cast since show() checks that mText is an Editable
9904                ((Spannable) mText).removeSpan(getEditor().mSuggestionRangeSpan);
9905
9906                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9907                if (hasInsertionController()) {
9908                    getInsertionController().show();
9909                }
9910            }
9911        }
9912
9913        public SuggestionsPopupWindow() {
9914            mCursorWasVisibleBeforeSuggestions = getEditor().mCursorVisible;
9915            mSuggestionSpanComparator = new SuggestionSpanComparator();
9916            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9917        }
9918
9919        @Override
9920        protected void createPopupWindow() {
9921            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9922                com.android.internal.R.attr.textSuggestionsWindowStyle);
9923            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9924            mPopupWindow.setFocusable(true);
9925            mPopupWindow.setClippingEnabled(false);
9926        }
9927
9928        @Override
9929        protected void initContentView() {
9930            ListView listView = new ListView(TextView.this.getContext());
9931            mSuggestionsAdapter = new SuggestionAdapter();
9932            listView.setAdapter(mSuggestionsAdapter);
9933            listView.setOnItemClickListener(this);
9934            mContentView = listView;
9935
9936            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9937            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9938            for (int i = 0; i < mSuggestionInfos.length; i++) {
9939                mSuggestionInfos[i] = new SuggestionInfo();
9940            }
9941        }
9942
9943        public boolean isShowingUp() {
9944            return mIsShowingUp;
9945        }
9946
9947        public void onParentLostFocus() {
9948            mIsShowingUp = false;
9949        }
9950
9951        private class SuggestionInfo {
9952            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9953            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9954            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9955            SpannableStringBuilder text = new SpannableStringBuilder();
9956            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9957                    android.R.style.TextAppearance_SuggestionHighlight);
9958        }
9959
9960        private class SuggestionAdapter extends BaseAdapter {
9961            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9962                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9963
9964            @Override
9965            public int getCount() {
9966                return mNumberOfSuggestions;
9967            }
9968
9969            @Override
9970            public Object getItem(int position) {
9971                return mSuggestionInfos[position];
9972            }
9973
9974            @Override
9975            public long getItemId(int position) {
9976                return position;
9977            }
9978
9979            @Override
9980            public View getView(int position, View convertView, ViewGroup parent) {
9981                TextView textView = (TextView) convertView;
9982
9983                if (textView == null) {
9984                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9985                            false);
9986                }
9987
9988                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9989                textView.setText(suggestionInfo.text);
9990
9991                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9992                    textView.setCompoundDrawablesWithIntrinsicBounds(
9993                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9994                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9995                    textView.setCompoundDrawablesWithIntrinsicBounds(
9996                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9997                } else {
9998                    textView.setCompoundDrawables(null, null, null, null);
9999                }
10000
10001                return textView;
10002            }
10003        }
10004
10005        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
10006            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
10007                final int flag1 = span1.getFlags();
10008                final int flag2 = span2.getFlags();
10009                if (flag1 != flag2) {
10010                    // The order here should match what is used in updateDrawState
10011                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
10012                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
10013                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
10014                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
10015                    if (easy1 && !misspelled1) return -1;
10016                    if (easy2 && !misspelled2) return 1;
10017                    if (misspelled1) return -1;
10018                    if (misspelled2) return 1;
10019                }
10020
10021                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
10022            }
10023        }
10024
10025        /**
10026         * Returns the suggestion spans that cover the current cursor position. The suggestion
10027         * spans are sorted according to the length of text that they are attached to.
10028         */
10029        private SuggestionSpan[] getSuggestionSpans() {
10030            int pos = TextView.this.getSelectionStart();
10031            Spannable spannable = (Spannable) TextView.this.mText;
10032            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
10033
10034            mSpansLengths.clear();
10035            for (SuggestionSpan suggestionSpan : suggestionSpans) {
10036                int start = spannable.getSpanStart(suggestionSpan);
10037                int end = spannable.getSpanEnd(suggestionSpan);
10038                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
10039            }
10040
10041            // The suggestions are sorted according to their types (easy correction first, then
10042            // misspelled) and to the length of the text that they cover (shorter first).
10043            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
10044            return suggestionSpans;
10045        }
10046
10047        @Override
10048        public void show() {
10049            if (!(mText instanceof Editable)) return;
10050
10051            if (updateSuggestions()) {
10052                mCursorWasVisibleBeforeSuggestions = getEditor().mCursorVisible;
10053                setCursorVisible(false);
10054                mIsShowingUp = true;
10055                super.show();
10056            }
10057        }
10058
10059        @Override
10060        protected void measureContent() {
10061            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
10062            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
10063                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
10064            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
10065                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
10066
10067            int width = 0;
10068            View view = null;
10069            for (int i = 0; i < mNumberOfSuggestions; i++) {
10070                view = mSuggestionsAdapter.getView(i, view, mContentView);
10071                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
10072                view.measure(horizontalMeasure, verticalMeasure);
10073                width = Math.max(width, view.getMeasuredWidth());
10074            }
10075
10076            // Enforce the width based on actual text widths
10077            mContentView.measure(
10078                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
10079                    verticalMeasure);
10080
10081            Drawable popupBackground = mPopupWindow.getBackground();
10082            if (popupBackground != null) {
10083                if (mTempRect == null) mTempRect = new Rect();
10084                popupBackground.getPadding(mTempRect);
10085                width += mTempRect.left + mTempRect.right;
10086            }
10087            mPopupWindow.setWidth(width);
10088        }
10089
10090        @Override
10091        protected int getTextOffset() {
10092            return getSelectionStart();
10093        }
10094
10095        @Override
10096        protected int getVerticalLocalPosition(int line) {
10097            return mLayout.getLineBottom(line);
10098        }
10099
10100        @Override
10101        protected int clipVertically(int positionY) {
10102            final int height = mContentView.getMeasuredHeight();
10103            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
10104            return Math.min(positionY, displayMetrics.heightPixels - height);
10105        }
10106
10107        @Override
10108        public void hide() {
10109            super.hide();
10110        }
10111
10112        private boolean updateSuggestions() {
10113            Spannable spannable = (Spannable) TextView.this.mText;
10114            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
10115
10116            final int nbSpans = suggestionSpans.length;
10117            // Suggestions are shown after a delay: the underlying spans may have been removed
10118            if (nbSpans == 0) return false;
10119
10120            mNumberOfSuggestions = 0;
10121            int spanUnionStart = mText.length();
10122            int spanUnionEnd = 0;
10123
10124            SuggestionSpan misspelledSpan = null;
10125            int underlineColor = 0;
10126
10127            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
10128                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
10129                final int spanStart = spannable.getSpanStart(suggestionSpan);
10130                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
10131                spanUnionStart = Math.min(spanStart, spanUnionStart);
10132                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
10133
10134                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
10135                    misspelledSpan = suggestionSpan;
10136                }
10137
10138                // The first span dictates the background color of the highlighted text
10139                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
10140
10141                String[] suggestions = suggestionSpan.getSuggestions();
10142                int nbSuggestions = suggestions.length;
10143                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
10144                    String suggestion = suggestions[suggestionIndex];
10145
10146                    boolean suggestionIsDuplicate = false;
10147                    for (int i = 0; i < mNumberOfSuggestions; i++) {
10148                        if (mSuggestionInfos[i].text.toString().equals(suggestion)) {
10149                            SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan;
10150                            final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan);
10151                            final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan);
10152                            if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) {
10153                                suggestionIsDuplicate = true;
10154                                break;
10155                            }
10156                        }
10157                    }
10158
10159                    if (!suggestionIsDuplicate) {
10160                        SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
10161                        suggestionInfo.suggestionSpan = suggestionSpan;
10162                        suggestionInfo.suggestionIndex = suggestionIndex;
10163                        suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion);
10164
10165                        mNumberOfSuggestions++;
10166
10167                        if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
10168                            // Also end outer for loop
10169                            spanIndex = nbSpans;
10170                            break;
10171                        }
10172                    }
10173                }
10174            }
10175
10176            for (int i = 0; i < mNumberOfSuggestions; i++) {
10177                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
10178            }
10179
10180            // Add "Add to dictionary" item if there is a span with the misspelled flag
10181            if (misspelledSpan != null) {
10182                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
10183                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
10184                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
10185                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
10186                    suggestionInfo.suggestionSpan = misspelledSpan;
10187                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
10188                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
10189                            getContext().getString(com.android.internal.R.string.addToDictionary));
10190                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
10191                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
10192
10193                    mNumberOfSuggestions++;
10194                }
10195            }
10196
10197            // Delete item
10198            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
10199            suggestionInfo.suggestionSpan = null;
10200            suggestionInfo.suggestionIndex = DELETE_TEXT;
10201            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
10202                    getContext().getString(com.android.internal.R.string.deleteText));
10203            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
10204                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
10205            mNumberOfSuggestions++;
10206
10207            if (getEditor().mSuggestionRangeSpan == null) getEditor().mSuggestionRangeSpan = new SuggestionRangeSpan();
10208            if (underlineColor == 0) {
10209                // Fallback on the default highlight color when the first span does not provide one
10210                getEditor().mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
10211            } else {
10212                final float BACKGROUND_TRANSPARENCY = 0.4f;
10213                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
10214                getEditor().mSuggestionRangeSpan.setBackgroundColor(
10215                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
10216            }
10217            spannable.setSpan(getEditor().mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
10218                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
10219
10220            mSuggestionsAdapter.notifyDataSetChanged();
10221            return true;
10222        }
10223
10224        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
10225                int unionEnd) {
10226            final Spannable text = (Spannable) mText;
10227            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
10228            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
10229
10230            // Adjust the start/end of the suggestion span
10231            suggestionInfo.suggestionStart = spanStart - unionStart;
10232            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
10233                    + suggestionInfo.text.length();
10234
10235            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
10236                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
10237
10238            // Add the text before and after the span.
10239            final String textAsString = text.toString();
10240            suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart));
10241            suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd));
10242        }
10243
10244        @Override
10245        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
10246            Editable editable = (Editable) mText;
10247            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
10248
10249            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
10250                final int spanUnionStart = editable.getSpanStart(getEditor().mSuggestionRangeSpan);
10251                int spanUnionEnd = editable.getSpanEnd(getEditor().mSuggestionRangeSpan);
10252                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
10253                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
10254                    if (spanUnionEnd < editable.length() &&
10255                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
10256                            (spanUnionStart == 0 ||
10257                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
10258                        spanUnionEnd = spanUnionEnd + 1;
10259                    }
10260                    deleteText_internal(spanUnionStart, spanUnionEnd);
10261                }
10262                hide();
10263                return;
10264            }
10265
10266            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
10267            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
10268            if (spanStart < 0 || spanEnd <= spanStart) {
10269                // Span has been removed
10270                hide();
10271                return;
10272            }
10273            final String originalText = mText.toString().substring(spanStart, spanEnd);
10274
10275            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
10276                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
10277                intent.putExtra("word", originalText);
10278                intent.putExtra("locale", getTextServicesLocale().toString());
10279                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
10280                getContext().startActivity(intent);
10281                // There is no way to know if the word was indeed added. Re-check.
10282                // TODO The ExtractEditText should remove the span in the original text instead
10283                editable.removeSpan(suggestionInfo.suggestionSpan);
10284                updateSpellCheckSpans(spanStart, spanEnd, false);
10285            } else {
10286                // SuggestionSpans are removed by replace: save them before
10287                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
10288                        SuggestionSpan.class);
10289                final int length = suggestionSpans.length;
10290                int[] suggestionSpansStarts = new int[length];
10291                int[] suggestionSpansEnds = new int[length];
10292                int[] suggestionSpansFlags = new int[length];
10293                for (int i = 0; i < length; i++) {
10294                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
10295                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
10296                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
10297                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
10298
10299                    // Remove potential misspelled flags
10300                    int suggestionSpanFlags = suggestionSpan.getFlags();
10301                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
10302                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
10303                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
10304                        suggestionSpan.setFlags(suggestionSpanFlags);
10305                    }
10306                }
10307
10308                final int suggestionStart = suggestionInfo.suggestionStart;
10309                final int suggestionEnd = suggestionInfo.suggestionEnd;
10310                final String suggestion = suggestionInfo.text.subSequence(
10311                        suggestionStart, suggestionEnd).toString();
10312                replaceText_internal(spanStart, spanEnd, suggestion);
10313
10314                // Notify source IME of the suggestion pick. Do this before swaping texts.
10315                if (!TextUtils.isEmpty(
10316                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
10317                    InputMethodManager imm = InputMethodManager.peekInstance();
10318                    if (imm != null) {
10319                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
10320                                suggestionInfo.suggestionIndex);
10321                    }
10322                }
10323
10324                // Swap text content between actual text and Suggestion span
10325                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
10326                suggestions[suggestionInfo.suggestionIndex] = originalText;
10327
10328                // Restore previous SuggestionSpans
10329                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
10330                for (int i = 0; i < length; i++) {
10331                    // Only spans that include the modified region make sense after replacement
10332                    // Spans partially included in the replaced region are removed, there is no
10333                    // way to assign them a valid range after replacement
10334                    if (suggestionSpansStarts[i] <= spanStart &&
10335                            suggestionSpansEnds[i] >= spanEnd) {
10336                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
10337                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
10338                    }
10339                }
10340
10341                // Move cursor at the end of the replaced word
10342                final int newCursorPosition = spanEnd + lengthDifference;
10343                setCursorPosition_internal(newCursorPosition, newCursorPosition);
10344            }
10345
10346            hide();
10347        }
10348    }
10349
10350    /**
10351     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10352     *
10353     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10354     * on which of these this TextView supports.
10355     */
10356    private class SelectionActionModeCallback implements ActionMode.Callback {
10357
10358        @Override
10359        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10360            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10361                    com.android.internal.R.styleable.SelectionModeDrawables);
10362
10363            boolean allowText = getContext().getResources().getBoolean(
10364                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10365
10366            mode.setTitle(allowText ?
10367                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10368            mode.setSubtitle(null);
10369
10370            int selectAllIconId = 0; // No icon by default
10371            if (!allowText) {
10372                // Provide an icon, text will not be displayed on smaller screens.
10373                selectAllIconId = styledAttributes.getResourceId(
10374                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10375            }
10376
10377            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10378                    setIcon(selectAllIconId).
10379                    setAlphabeticShortcut('a').
10380                    setShowAsAction(
10381                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10382
10383            if (canCut()) {
10384                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10385                    setIcon(styledAttributes.getResourceId(
10386                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10387                    setAlphabeticShortcut('x').
10388                    setShowAsAction(
10389                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10390            }
10391
10392            if (canCopy()) {
10393                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10394                    setIcon(styledAttributes.getResourceId(
10395                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10396                    setAlphabeticShortcut('c').
10397                    setShowAsAction(
10398                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10399            }
10400
10401            if (canPaste()) {
10402                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10403                        setIcon(styledAttributes.getResourceId(
10404                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10405                        setAlphabeticShortcut('v').
10406                        setShowAsAction(
10407                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10408            }
10409
10410            styledAttributes.recycle();
10411
10412            if (getEditor().mCustomSelectionActionModeCallback != null) {
10413                if (!getEditor().mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10414                    // The custom mode can choose to cancel the action mode
10415                    return false;
10416                }
10417            }
10418
10419            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10420                getSelectionController().show();
10421                return true;
10422            } else {
10423                return false;
10424            }
10425        }
10426
10427        @Override
10428        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10429            if (getEditor().mCustomSelectionActionModeCallback != null) {
10430                return getEditor().mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10431            }
10432            return true;
10433        }
10434
10435        @Override
10436        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10437            if (getEditor().mCustomSelectionActionModeCallback != null &&
10438                 getEditor().mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10439                return true;
10440            }
10441            return onTextContextMenuItem(item.getItemId());
10442        }
10443
10444        @Override
10445        public void onDestroyActionMode(ActionMode mode) {
10446            if (getEditor().mCustomSelectionActionModeCallback != null) {
10447                getEditor().mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10448            }
10449            Selection.setSelection((Spannable) mText, getSelectionEnd());
10450
10451            if (getEditor().mSelectionModifierCursorController != null) {
10452                getEditor().mSelectionModifierCursorController.hide();
10453            }
10454
10455            getEditor().mSelectionActionMode = null;
10456        }
10457    }
10458
10459    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10460        private static final int POPUP_TEXT_LAYOUT =
10461                com.android.internal.R.layout.text_edit_action_popup_text;
10462        private TextView mPasteTextView;
10463        private TextView mReplaceTextView;
10464
10465        @Override
10466        protected void createPopupWindow() {
10467            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10468                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10469            mPopupWindow.setClippingEnabled(true);
10470        }
10471
10472        @Override
10473        protected void initContentView() {
10474            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10475            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10476            mContentView = linearLayout;
10477            mContentView.setBackgroundResource(
10478                    com.android.internal.R.drawable.text_edit_paste_window);
10479
10480            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10481                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10482
10483            LayoutParams wrapContent = new LayoutParams(
10484                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10485
10486            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10487            mPasteTextView.setLayoutParams(wrapContent);
10488            mContentView.addView(mPasteTextView);
10489            mPasteTextView.setText(com.android.internal.R.string.paste);
10490            mPasteTextView.setOnClickListener(this);
10491
10492            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10493            mReplaceTextView.setLayoutParams(wrapContent);
10494            mContentView.addView(mReplaceTextView);
10495            mReplaceTextView.setText(com.android.internal.R.string.replace);
10496            mReplaceTextView.setOnClickListener(this);
10497        }
10498
10499        @Override
10500        public void show() {
10501            boolean canPaste = canPaste();
10502            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10503            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10504            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10505
10506            if (!canPaste && !canSuggest) return;
10507
10508            super.show();
10509        }
10510
10511        @Override
10512        public void onClick(View view) {
10513            if (view == mPasteTextView && canPaste()) {
10514                onTextContextMenuItem(ID_PASTE);
10515                hide();
10516            } else if (view == mReplaceTextView) {
10517                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10518                stopSelectionActionMode();
10519                Selection.setSelection((Spannable) mText, middle);
10520                showSuggestions();
10521            }
10522        }
10523
10524        @Override
10525        protected int getTextOffset() {
10526            return (getSelectionStart() + getSelectionEnd()) / 2;
10527        }
10528
10529        @Override
10530        protected int getVerticalLocalPosition(int line) {
10531            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10532        }
10533
10534        @Override
10535        protected int clipVertically(int positionY) {
10536            if (positionY < 0) {
10537                final int offset = getTextOffset();
10538                final int line = mLayout.getLineForOffset(offset);
10539                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10540                positionY += mContentView.getMeasuredHeight();
10541
10542                // Assumes insertion and selection handles share the same height
10543                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10544                positionY += handle.getIntrinsicHeight();
10545            }
10546
10547            return positionY;
10548        }
10549    }
10550
10551    private abstract class HandleView extends View implements TextViewPositionListener {
10552        protected Drawable mDrawable;
10553        protected Drawable mDrawableLtr;
10554        protected Drawable mDrawableRtl;
10555        private final PopupWindow mContainer;
10556        // Position with respect to the parent TextView
10557        private int mPositionX, mPositionY;
10558        private boolean mIsDragging;
10559        // Offset from touch position to mPosition
10560        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10561        protected int mHotspotX;
10562        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10563        private float mTouchOffsetY;
10564        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10565        private float mIdealVerticalOffset;
10566        // Parent's (TextView) previous position in window
10567        private int mLastParentX, mLastParentY;
10568        // Transient action popup window for Paste and Replace actions
10569        protected ActionPopupWindow mActionPopupWindow;
10570        // Previous text character offset
10571        private int mPreviousOffset = -1;
10572        // Previous text character offset
10573        private boolean mPositionHasChanged = true;
10574        // Used to delay the appearance of the action popup window
10575        private Runnable mActionPopupShower;
10576
10577        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10578            super(TextView.this.mContext);
10579            mContainer = new PopupWindow(TextView.this.mContext, null,
10580                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10581            mContainer.setSplitTouchEnabled(true);
10582            mContainer.setClippingEnabled(false);
10583            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10584            mContainer.setContentView(this);
10585
10586            mDrawableLtr = drawableLtr;
10587            mDrawableRtl = drawableRtl;
10588
10589            updateDrawable();
10590
10591            final int handleHeight = mDrawable.getIntrinsicHeight();
10592            mTouchOffsetY = -0.3f * handleHeight;
10593            mIdealVerticalOffset = 0.7f * handleHeight;
10594        }
10595
10596        protected void updateDrawable() {
10597            final int offset = getCurrentCursorOffset();
10598            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10599            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10600            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10601        }
10602
10603        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10604
10605        // Touch-up filter: number of previous positions remembered
10606        private static final int HISTORY_SIZE = 5;
10607        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10608        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10609        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10610        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10611        private int mPreviousOffsetIndex = 0;
10612        private int mNumberPreviousOffsets = 0;
10613
10614        private void startTouchUpFilter(int offset) {
10615            mNumberPreviousOffsets = 0;
10616            addPositionToTouchUpFilter(offset);
10617        }
10618
10619        private void addPositionToTouchUpFilter(int offset) {
10620            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10621            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10622            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10623            mNumberPreviousOffsets++;
10624        }
10625
10626        private void filterOnTouchUp() {
10627            final long now = SystemClock.uptimeMillis();
10628            int i = 0;
10629            int index = mPreviousOffsetIndex;
10630            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10631            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10632                i++;
10633                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10634            }
10635
10636            if (i > 0 && i < iMax &&
10637                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10638                positionAtCursorOffset(mPreviousOffsets[index], false);
10639            }
10640        }
10641
10642        public boolean offsetHasBeenChanged() {
10643            return mNumberPreviousOffsets > 1;
10644        }
10645
10646        @Override
10647        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10648            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10649        }
10650
10651        public void show() {
10652            if (isShowing()) return;
10653
10654            getPositionListener().addSubscriber(this, true /* local position may change */);
10655
10656            // Make sure the offset is always considered new, even when focusing at same position
10657            mPreviousOffset = -1;
10658            positionAtCursorOffset(getCurrentCursorOffset(), false);
10659
10660            hideActionPopupWindow();
10661        }
10662
10663        protected void dismiss() {
10664            mIsDragging = false;
10665            mContainer.dismiss();
10666            onDetached();
10667        }
10668
10669        public void hide() {
10670            dismiss();
10671
10672            TextView.this.getPositionListener().removeSubscriber(this);
10673        }
10674
10675        void showActionPopupWindow(int delay) {
10676            if (mActionPopupWindow == null) {
10677                mActionPopupWindow = new ActionPopupWindow();
10678            }
10679            if (mActionPopupShower == null) {
10680                mActionPopupShower = new Runnable() {
10681                    public void run() {
10682                        mActionPopupWindow.show();
10683                    }
10684                };
10685            } else {
10686                TextView.this.removeCallbacks(mActionPopupShower);
10687            }
10688            TextView.this.postDelayed(mActionPopupShower, delay);
10689        }
10690
10691        protected void hideActionPopupWindow() {
10692            if (mActionPopupShower != null) {
10693                TextView.this.removeCallbacks(mActionPopupShower);
10694            }
10695            if (mActionPopupWindow != null) {
10696                mActionPopupWindow.hide();
10697            }
10698        }
10699
10700        public boolean isShowing() {
10701            return mContainer.isShowing();
10702        }
10703
10704        private boolean isVisible() {
10705            // Always show a dragging handle.
10706            if (mIsDragging) {
10707                return true;
10708            }
10709
10710            if (isInBatchEditMode()) {
10711                return false;
10712            }
10713
10714            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10715        }
10716
10717        public abstract int getCurrentCursorOffset();
10718
10719        protected abstract void updateSelection(int offset);
10720
10721        public abstract void updatePosition(float x, float y);
10722
10723        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10724            // A HandleView relies on the layout, which may be nulled by external methods
10725            if (mLayout == null) {
10726                // Will update controllers' state, hiding them and stopping selection mode if needed
10727                prepareCursorControllers();
10728                return;
10729            }
10730
10731            if (offset != mPreviousOffset || parentScrolled) {
10732                updateSelection(offset);
10733                addPositionToTouchUpFilter(offset);
10734                final int line = mLayout.getLineForOffset(offset);
10735
10736                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10737                mPositionY = mLayout.getLineBottom(line);
10738
10739                // Take TextView's padding and scroll into account.
10740                mPositionX += viewportToContentHorizontalOffset();
10741                mPositionY += viewportToContentVerticalOffset();
10742
10743                mPreviousOffset = offset;
10744                mPositionHasChanged = true;
10745            }
10746        }
10747
10748        public void updatePosition(int parentPositionX, int parentPositionY,
10749                boolean parentPositionChanged, boolean parentScrolled) {
10750            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10751            if (parentPositionChanged || mPositionHasChanged) {
10752                if (mIsDragging) {
10753                    // Update touchToWindow offset in case of parent scrolling while dragging
10754                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10755                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10756                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10757                        mLastParentX = parentPositionX;
10758                        mLastParentY = parentPositionY;
10759                    }
10760
10761                    onHandleMoved();
10762                }
10763
10764                if (isVisible()) {
10765                    final int positionX = parentPositionX + mPositionX;
10766                    final int positionY = parentPositionY + mPositionY;
10767                    if (isShowing()) {
10768                        mContainer.update(positionX, positionY, -1, -1);
10769                    } else {
10770                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10771                                positionX, positionY);
10772                    }
10773                } else {
10774                    if (isShowing()) {
10775                        dismiss();
10776                    }
10777                }
10778
10779                mPositionHasChanged = false;
10780            }
10781        }
10782
10783        @Override
10784        protected void onDraw(Canvas c) {
10785            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10786            mDrawable.draw(c);
10787        }
10788
10789        @Override
10790        public boolean onTouchEvent(MotionEvent ev) {
10791            switch (ev.getActionMasked()) {
10792                case MotionEvent.ACTION_DOWN: {
10793                    startTouchUpFilter(getCurrentCursorOffset());
10794                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10795                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10796
10797                    final PositionListener positionListener = getPositionListener();
10798                    mLastParentX = positionListener.getPositionX();
10799                    mLastParentY = positionListener.getPositionY();
10800                    mIsDragging = true;
10801                    break;
10802                }
10803
10804                case MotionEvent.ACTION_MOVE: {
10805                    final float rawX = ev.getRawX();
10806                    final float rawY = ev.getRawY();
10807
10808                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10809                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10810                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10811                    float newVerticalOffset;
10812                    if (previousVerticalOffset < mIdealVerticalOffset) {
10813                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10814                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10815                    } else {
10816                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10817                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10818                    }
10819                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10820
10821                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10822                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10823
10824                    updatePosition(newPosX, newPosY);
10825                    break;
10826                }
10827
10828                case MotionEvent.ACTION_UP:
10829                    filterOnTouchUp();
10830                    mIsDragging = false;
10831                    break;
10832
10833                case MotionEvent.ACTION_CANCEL:
10834                    mIsDragging = false;
10835                    break;
10836            }
10837            return true;
10838        }
10839
10840        public boolean isDragging() {
10841            return mIsDragging;
10842        }
10843
10844        void onHandleMoved() {
10845            hideActionPopupWindow();
10846        }
10847
10848        public void onDetached() {
10849            hideActionPopupWindow();
10850        }
10851    }
10852
10853    private class InsertionHandleView extends HandleView {
10854        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10855        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10856
10857        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10858        private float mDownPositionX, mDownPositionY;
10859        private Runnable mHider;
10860
10861        public InsertionHandleView(Drawable drawable) {
10862            super(drawable, drawable);
10863        }
10864
10865        @Override
10866        public void show() {
10867            super.show();
10868
10869            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - LAST_CUT_OR_COPY_TIME;
10870            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10871                showActionPopupWindow(0);
10872            }
10873
10874            hideAfterDelay();
10875        }
10876
10877        public void showWithActionPopup() {
10878            show();
10879            showActionPopupWindow(0);
10880        }
10881
10882        private void hideAfterDelay() {
10883            if (mHider == null) {
10884                mHider = new Runnable() {
10885                    public void run() {
10886                        hide();
10887                    }
10888                };
10889            } else {
10890                removeHiderCallback();
10891            }
10892            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10893        }
10894
10895        private void removeHiderCallback() {
10896            if (mHider != null) {
10897                TextView.this.removeCallbacks(mHider);
10898            }
10899        }
10900
10901        @Override
10902        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10903            return drawable.getIntrinsicWidth() / 2;
10904        }
10905
10906        @Override
10907        public boolean onTouchEvent(MotionEvent ev) {
10908            final boolean result = super.onTouchEvent(ev);
10909
10910            switch (ev.getActionMasked()) {
10911                case MotionEvent.ACTION_DOWN:
10912                    mDownPositionX = ev.getRawX();
10913                    mDownPositionY = ev.getRawY();
10914                    break;
10915
10916                case MotionEvent.ACTION_UP:
10917                    if (!offsetHasBeenChanged()) {
10918                        final float deltaX = mDownPositionX - ev.getRawX();
10919                        final float deltaY = mDownPositionY - ev.getRawY();
10920                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10921
10922                        final ViewConfiguration viewConfiguration = ViewConfiguration.get(
10923                                TextView.this.getContext());
10924                        final int touchSlop = viewConfiguration.getScaledTouchSlop();
10925
10926                        if (distanceSquared < touchSlop * touchSlop) {
10927                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10928                                // Tapping on the handle dismisses the displayed action popup
10929                                mActionPopupWindow.hide();
10930                            } else {
10931                                showWithActionPopup();
10932                            }
10933                        }
10934                    }
10935                    hideAfterDelay();
10936                    break;
10937
10938                case MotionEvent.ACTION_CANCEL:
10939                    hideAfterDelay();
10940                    break;
10941
10942                default:
10943                    break;
10944            }
10945
10946            return result;
10947        }
10948
10949        @Override
10950        public int getCurrentCursorOffset() {
10951            return TextView.this.getSelectionStart();
10952        }
10953
10954        @Override
10955        public void updateSelection(int offset) {
10956            Selection.setSelection((Spannable) mText, offset);
10957        }
10958
10959        @Override
10960        public void updatePosition(float x, float y) {
10961            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10962        }
10963
10964        @Override
10965        void onHandleMoved() {
10966            super.onHandleMoved();
10967            removeHiderCallback();
10968        }
10969
10970        @Override
10971        public void onDetached() {
10972            super.onDetached();
10973            removeHiderCallback();
10974        }
10975    }
10976
10977    private class SelectionStartHandleView extends HandleView {
10978
10979        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10980            super(drawableLtr, drawableRtl);
10981        }
10982
10983        @Override
10984        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10985            if (isRtlRun) {
10986                return drawable.getIntrinsicWidth() / 4;
10987            } else {
10988                return (drawable.getIntrinsicWidth() * 3) / 4;
10989            }
10990        }
10991
10992        @Override
10993        public int getCurrentCursorOffset() {
10994            return TextView.this.getSelectionStart();
10995        }
10996
10997        @Override
10998        public void updateSelection(int offset) {
10999            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
11000            updateDrawable();
11001        }
11002
11003        @Override
11004        public void updatePosition(float x, float y) {
11005            int offset = getOffsetForPosition(x, y);
11006
11007            // Handles can not cross and selection is at least one character
11008            final int selectionEnd = getSelectionEnd();
11009            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
11010
11011            positionAtCursorOffset(offset, false);
11012        }
11013
11014        public ActionPopupWindow getActionPopupWindow() {
11015            return mActionPopupWindow;
11016        }
11017    }
11018
11019    private class SelectionEndHandleView extends HandleView {
11020
11021        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
11022            super(drawableLtr, drawableRtl);
11023        }
11024
11025        @Override
11026        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
11027            if (isRtlRun) {
11028                return (drawable.getIntrinsicWidth() * 3) / 4;
11029            } else {
11030                return drawable.getIntrinsicWidth() / 4;
11031            }
11032        }
11033
11034        @Override
11035        public int getCurrentCursorOffset() {
11036            return TextView.this.getSelectionEnd();
11037        }
11038
11039        @Override
11040        public void updateSelection(int offset) {
11041            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
11042            updateDrawable();
11043        }
11044
11045        @Override
11046        public void updatePosition(float x, float y) {
11047            int offset = getOffsetForPosition(x, y);
11048
11049            // Handles can not cross and selection is at least one character
11050            final int selectionStart = getSelectionStart();
11051            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
11052
11053            positionAtCursorOffset(offset, false);
11054        }
11055
11056        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
11057            mActionPopupWindow = actionPopupWindow;
11058        }
11059    }
11060
11061    /**
11062     * A CursorController instance can be used to control a cursor in the text.
11063     * It is not used outside of {@link TextView}.
11064     * @hide
11065     */
11066    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
11067        /**
11068         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
11069         * See also {@link #hide()}.
11070         */
11071        public void show();
11072
11073        /**
11074         * Hide the cursor controller from screen.
11075         * See also {@link #show()}.
11076         */
11077        public void hide();
11078
11079        /**
11080         * Called when the view is detached from window. Perform house keeping task, such as
11081         * stopping Runnable thread that would otherwise keep a reference on the context, thus
11082         * preventing the activity from being recycled.
11083         */
11084        public void onDetached();
11085    }
11086
11087    private class InsertionPointCursorController implements CursorController {
11088        private InsertionHandleView mHandle;
11089
11090        public void show() {
11091            getHandle().show();
11092        }
11093
11094        public void showWithActionPopup() {
11095            getHandle().showWithActionPopup();
11096        }
11097
11098        public void hide() {
11099            if (mHandle != null) {
11100                mHandle.hide();
11101            }
11102        }
11103
11104        public void onTouchModeChanged(boolean isInTouchMode) {
11105            if (!isInTouchMode) {
11106                hide();
11107            }
11108        }
11109
11110        private InsertionHandleView getHandle() {
11111            if (getEditor().mSelectHandleCenter == null) {
11112                getEditor().mSelectHandleCenter = mContext.getResources().getDrawable(
11113                        mTextSelectHandleRes);
11114            }
11115            if (mHandle == null) {
11116                mHandle = new InsertionHandleView(getEditor().mSelectHandleCenter);
11117            }
11118            return mHandle;
11119        }
11120
11121        @Override
11122        public void onDetached() {
11123            final ViewTreeObserver observer = getViewTreeObserver();
11124            observer.removeOnTouchModeChangeListener(this);
11125
11126            if (mHandle != null) mHandle.onDetached();
11127        }
11128    }
11129
11130    private class SelectionModifierCursorController implements CursorController {
11131        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
11132        // The cursor controller handles, lazily created when shown.
11133        private SelectionStartHandleView mStartHandle;
11134        private SelectionEndHandleView mEndHandle;
11135        // The offsets of that last touch down event. Remembered to start selection there.
11136        private int mMinTouchOffset, mMaxTouchOffset;
11137
11138        // Double tap detection
11139        private long mPreviousTapUpTime = 0;
11140        private float mDownPositionX, mDownPositionY;
11141        private boolean mGestureStayedInTapRegion;
11142
11143        SelectionModifierCursorController() {
11144            resetTouchOffsets();
11145        }
11146
11147        public void show() {
11148            if (isInBatchEditMode()) {
11149                return;
11150            }
11151            initDrawables();
11152            initHandles();
11153            hideInsertionPointCursorController();
11154        }
11155
11156        private void initDrawables() {
11157            if (getEditor().mSelectHandleLeft == null) {
11158                getEditor().mSelectHandleLeft = mContext.getResources().getDrawable(
11159                        mTextSelectHandleLeftRes);
11160            }
11161            if (getEditor().mSelectHandleRight == null) {
11162                getEditor().mSelectHandleRight = mContext.getResources().getDrawable(
11163                        mTextSelectHandleRightRes);
11164            }
11165        }
11166
11167        private void initHandles() {
11168            // Lazy object creation has to be done before updatePosition() is called.
11169            if (mStartHandle == null) {
11170                mStartHandle = new SelectionStartHandleView(getEditor().mSelectHandleLeft, getEditor().mSelectHandleRight);
11171            }
11172            if (mEndHandle == null) {
11173                mEndHandle = new SelectionEndHandleView(getEditor().mSelectHandleRight, getEditor().mSelectHandleLeft);
11174            }
11175
11176            mStartHandle.show();
11177            mEndHandle.show();
11178
11179            // Make sure both left and right handles share the same ActionPopupWindow (so that
11180            // moving any of the handles hides the action popup).
11181            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11182            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11183
11184            hideInsertionPointCursorController();
11185        }
11186
11187        public void hide() {
11188            if (mStartHandle != null) mStartHandle.hide();
11189            if (mEndHandle != null) mEndHandle.hide();
11190        }
11191
11192        public void onTouchEvent(MotionEvent event) {
11193            // This is done even when the View does not have focus, so that long presses can start
11194            // selection and tap can move cursor from this tap position.
11195            switch (event.getActionMasked()) {
11196                case MotionEvent.ACTION_DOWN:
11197                    final float x = event.getX();
11198                    final float y = event.getY();
11199
11200                    // Remember finger down position, to be able to start selection from there
11201                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11202
11203                    // Double tap detection
11204                    if (mGestureStayedInTapRegion) {
11205                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11206                        if (duration <= ViewConfiguration.getDoubleTapTimeout()) {
11207                            final float deltaX = x - mDownPositionX;
11208                            final float deltaY = y - mDownPositionY;
11209                            final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11210
11211                            ViewConfiguration viewConfiguration = ViewConfiguration.get(
11212                                    TextView.this.getContext());
11213                            int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop();
11214                            boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop;
11215
11216                            if (stayedInArea && isPositionOnText(x, y)) {
11217                                startSelectionActionMode();
11218                                getEditor().mDiscardNextActionUp = true;
11219                            }
11220                        }
11221                    }
11222
11223                    mDownPositionX = x;
11224                    mDownPositionY = y;
11225                    mGestureStayedInTapRegion = true;
11226                    break;
11227
11228                case MotionEvent.ACTION_POINTER_DOWN:
11229                case MotionEvent.ACTION_POINTER_UP:
11230                    // Handle multi-point gestures. Keep min and max offset positions.
11231                    // Only activated for devices that correctly handle multi-touch.
11232                    if (mContext.getPackageManager().hasSystemFeature(
11233                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11234                        updateMinAndMaxOffsets(event);
11235                    }
11236                    break;
11237
11238                case MotionEvent.ACTION_MOVE:
11239                    if (mGestureStayedInTapRegion) {
11240                        final float deltaX = event.getX() - mDownPositionX;
11241                        final float deltaY = event.getY() - mDownPositionY;
11242                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11243
11244                        final ViewConfiguration viewConfiguration = ViewConfiguration.get(
11245                                TextView.this.getContext());
11246                        int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop();
11247
11248                        if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) {
11249                            mGestureStayedInTapRegion = false;
11250                        }
11251                    }
11252                    break;
11253
11254                case MotionEvent.ACTION_UP:
11255                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11256                    break;
11257            }
11258        }
11259
11260        /**
11261         * @param event
11262         */
11263        private void updateMinAndMaxOffsets(MotionEvent event) {
11264            int pointerCount = event.getPointerCount();
11265            for (int index = 0; index < pointerCount; index++) {
11266                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11267                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11268                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11269            }
11270        }
11271
11272        public int getMinTouchOffset() {
11273            return mMinTouchOffset;
11274        }
11275
11276        public int getMaxTouchOffset() {
11277            return mMaxTouchOffset;
11278        }
11279
11280        public void resetTouchOffsets() {
11281            mMinTouchOffset = mMaxTouchOffset = -1;
11282        }
11283
11284        /**
11285         * @return true iff this controller is currently used to move the selection start.
11286         */
11287        public boolean isSelectionStartDragged() {
11288            return mStartHandle != null && mStartHandle.isDragging();
11289        }
11290
11291        public void onTouchModeChanged(boolean isInTouchMode) {
11292            if (!isInTouchMode) {
11293                hide();
11294            }
11295        }
11296
11297        @Override
11298        public void onDetached() {
11299            final ViewTreeObserver observer = getViewTreeObserver();
11300            observer.removeOnTouchModeChangeListener(this);
11301
11302            if (mStartHandle != null) mStartHandle.onDetached();
11303            if (mEndHandle != null) mEndHandle.onDetached();
11304        }
11305    }
11306
11307    static class InputContentType {
11308        int imeOptions = EditorInfo.IME_NULL;
11309        String privateImeOptions;
11310        CharSequence imeActionLabel;
11311        int imeActionId;
11312        Bundle extras;
11313        OnEditorActionListener onEditorActionListener;
11314        boolean enterDown;
11315    }
11316
11317    static class InputMethodState {
11318        Rect mCursorRectInWindow = new Rect();
11319        RectF mTmpRectF = new RectF();
11320        float[] mTmpOffset = new float[2];
11321        ExtractedTextRequest mExtracting;
11322        final ExtractedText mTmpExtracted = new ExtractedText();
11323        int mBatchEditNesting;
11324        boolean mCursorChanged;
11325        boolean mSelectionModeChanged;
11326        boolean mContentChanged;
11327        int mChangedStart, mChangedEnd, mChangedDelta;
11328    }
11329
11330    private class Editor {
11331        Editor() {
11332            mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
11333            final CompatibilityInfo compat = TextView.this.getResources().getCompatibilityInfo();
11334            mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
11335        }
11336
11337        // Cursor Controllers.
11338        InsertionPointCursorController mInsertionPointCursorController;
11339        SelectionModifierCursorController mSelectionModifierCursorController;
11340        ActionMode mSelectionActionMode;
11341        boolean mInsertionControllerEnabled;
11342        boolean mSelectionControllerEnabled;
11343
11344        // Used to highlight a word when it is corrected by the IME
11345        CorrectionHighlighter mCorrectionHighlighter;
11346
11347        InputContentType mInputContentType;
11348        InputMethodState mInputMethodState;
11349
11350        Path mHighlightPath;
11351        boolean mHighlightPathBogus = true;
11352        final Paint mHighlightPaint;
11353
11354        DisplayList mTextDisplayList;
11355        boolean mTextDisplayListIsValid;
11356
11357        boolean mFrozenWithFocus;
11358        boolean mSelectionMoved;
11359        boolean mTouchFocusSelected;
11360
11361        KeyListener mKeyListener;
11362        int mInputType = EditorInfo.TYPE_NULL;
11363
11364        boolean mDiscardNextActionUp;
11365        boolean mIgnoreActionUpEvent;
11366
11367        long mShowCursor;
11368        Blink mBlink;
11369
11370        boolean mCursorVisible = true;
11371        boolean mSelectAllOnFocus;
11372        boolean mTextIsSelectable;
11373
11374        CharSequence mError;
11375        boolean mErrorWasChanged;
11376        ErrorPopup mErrorPopup;
11377        /**
11378         * This flag is set if the TextView tries to display an error before it
11379         * is attached to the window (so its position is still unknown).
11380         * It causes the error to be shown later, when onAttachedToWindow()
11381         * is called.
11382         */
11383        boolean mShowErrorAfterAttach;
11384
11385        boolean mInBatchEditControllers;
11386
11387        SuggestionsPopupWindow mSuggestionsPopupWindow;
11388        SuggestionRangeSpan mSuggestionRangeSpan;
11389        Runnable mShowSuggestionRunnable;
11390
11391        final Drawable[] mCursorDrawable = new Drawable[2];
11392        int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2 (split)
11393
11394        Drawable mSelectHandleLeft;
11395        Drawable mSelectHandleRight;
11396        Drawable mSelectHandleCenter;
11397
11398        // Global listener that detects changes in the global position of the TextView
11399        PositionListener mPositionListener;
11400
11401        float mLastDownPositionX, mLastDownPositionY;
11402        Callback mCustomSelectionActionModeCallback;
11403
11404        // Set when this TextView gained focus with some text selected. Will start selection mode.
11405        boolean mCreatedWithASelection;
11406
11407        WordIterator mWordIterator;
11408        SpellChecker mSpellChecker;
11409
11410        void onAttachedToWindow() {
11411            final ViewTreeObserver observer = getViewTreeObserver();
11412            // No need to create the controller.
11413            // The get method will add the listener on controller creation.
11414            if (mInsertionPointCursorController != null) {
11415                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11416            }
11417            if (mSelectionModifierCursorController != null) {
11418                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11419            }
11420            updateSpellCheckSpans(0, mText.length(), true /* create the spell checker if needed */);
11421        }
11422
11423        void onDetachedFromWindow() {
11424            if (mError != null) {
11425                hideError();
11426            }
11427
11428            if (mBlink != null) {
11429                mBlink.removeCallbacks(mBlink);
11430            }
11431
11432            if (mInsertionPointCursorController != null) {
11433                mInsertionPointCursorController.onDetached();
11434            }
11435
11436            if (mSelectionModifierCursorController != null) {
11437                mSelectionModifierCursorController.onDetached();
11438            }
11439
11440            if (mShowSuggestionRunnable != null) {
11441                removeCallbacks(mShowSuggestionRunnable);
11442            }
11443
11444            if (mTextDisplayList != null) {
11445                mTextDisplayList.invalidate();
11446            }
11447
11448            if (mSpellChecker != null) {
11449                mSpellChecker.closeSession();
11450                // Forces the creation of a new SpellChecker next time this window is created.
11451                // Will handle the cases where the settings has been changed in the meantime.
11452                mSpellChecker = null;
11453            }
11454
11455            hideControllers();
11456        }
11457
11458        void adjustInputType(boolean password, boolean passwordInputType,
11459                boolean webPasswordInputType, boolean numberPasswordInputType) {
11460            // mInputType has been set from inputType, possibly modified by mInputMethod.
11461            // Specialize mInputType to [web]password if we have a text class and the original input
11462            // type was a password.
11463            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
11464                if (password || passwordInputType) {
11465                    mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
11466                            | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
11467                }
11468                if (webPasswordInputType) {
11469                    mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
11470                            | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
11471                }
11472            } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
11473                if (numberPasswordInputType) {
11474                    mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
11475                            | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
11476                }
11477            }
11478        }
11479
11480        void setFrame() {
11481            if (mErrorPopup != null) {
11482                TextView tv = (TextView) mErrorPopup.getContentView();
11483                chooseSize(mErrorPopup, mError, tv);
11484                mErrorPopup.update(TextView.this, getErrorX(), getErrorY(),
11485                        mErrorPopup.getWidth(), mErrorPopup.getHeight());
11486            }
11487        }
11488
11489        void onFocusChanged(boolean focused, int direction) {
11490            mShowCursor = SystemClock.uptimeMillis();
11491            ensureEndedBatchEdit();
11492
11493            if (focused) {
11494                int selStart = getSelectionStart();
11495                int selEnd = getSelectionEnd();
11496
11497                // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
11498                // mode for these, unless there was a specific selection already started.
11499                final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
11500                        selEnd == mText.length();
11501
11502                mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
11503
11504                if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
11505                    // If a tap was used to give focus to that view, move cursor at tap position.
11506                    // Has to be done before onTakeFocus, which can be overloaded.
11507                    final int lastTapPosition = getLastTapPosition();
11508                    if (lastTapPosition >= 0) {
11509                        Selection.setSelection((Spannable) mText, lastTapPosition);
11510                    }
11511
11512                    // Note this may have to be moved out of the Editor class
11513                    if (mMovement != null) {
11514                        mMovement.onTakeFocus(TextView.this, (Spannable) mText, direction);
11515                    }
11516
11517                    // The DecorView does not have focus when the 'Done' ExtractEditText button is
11518                    // pressed. Since it is the ViewAncestor's mView, it requests focus before
11519                    // ExtractEditText clears focus, which gives focus to the ExtractEditText.
11520                    // This special case ensure that we keep current selection in that case.
11521                    // It would be better to know why the DecorView does not have focus at that time.
11522                    if (((TextView.this instanceof ExtractEditText) || mSelectionMoved) &&
11523                            selStart >= 0 && selEnd >= 0) {
11524                        /*
11525                         * Someone intentionally set the selection, so let them
11526                         * do whatever it is that they wanted to do instead of
11527                         * the default on-focus behavior.  We reset the selection
11528                         * here instead of just skipping the onTakeFocus() call
11529                         * because some movement methods do something other than
11530                         * just setting the selection in theirs and we still
11531                         * need to go through that path.
11532                         */
11533                        Selection.setSelection((Spannable) mText, selStart, selEnd);
11534                    }
11535
11536                    if (mSelectAllOnFocus) {
11537                        selectAll();
11538                    }
11539
11540                    mTouchFocusSelected = true;
11541                }
11542
11543                mFrozenWithFocus = false;
11544                mSelectionMoved = false;
11545
11546                if (mError != null) {
11547                    showError();
11548                }
11549
11550                makeBlink();
11551            } else {
11552                if (mError != null) {
11553                    hideError();
11554                }
11555                // Don't leave us in the middle of a batch edit.
11556                onEndBatchEdit();
11557
11558                if (TextView.this instanceof ExtractEditText) {
11559                    // terminateTextSelectionMode removes selection, which we want to keep when
11560                    // ExtractEditText goes out of focus.
11561                    final int selStart = getSelectionStart();
11562                    final int selEnd = getSelectionEnd();
11563                    hideControllers();
11564                    Selection.setSelection((Spannable) mText, selStart, selEnd);
11565                } else {
11566                    hideControllers();
11567                    downgradeEasyCorrectionSpans();
11568                }
11569
11570                // No need to create the controller
11571                if (mSelectionModifierCursorController != null) {
11572                    mSelectionModifierCursorController.resetTouchOffsets();
11573                }
11574            }
11575        }
11576
11577        void sendOnTextChanged(int start, int after) {
11578            updateSpellCheckSpans(start, start + after, false);
11579            mTextDisplayListIsValid = false;
11580
11581            // Hide the controllers as soon as text is modified (typing, procedural...)
11582            // We do not hide the span controllers, since they can be added when a new text is
11583            // inserted into the text view (voice IME).
11584            hideCursorControllers();
11585        }
11586
11587        private int getLastTapPosition() {
11588            // No need to create the controller at that point, no last tap position saved
11589            if (mSelectionModifierCursorController != null) {
11590                int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
11591                if (lastTapPosition >= 0) {
11592                    // Safety check, should not be possible.
11593                    if (lastTapPosition > mText.length()) {
11594                        Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
11595                                + mText.length() + ")");
11596                        lastTapPosition = mText.length();
11597                    }
11598                    return lastTapPosition;
11599                }
11600            }
11601
11602            return -1;
11603        }
11604
11605        void onWindowFocusChanged(boolean hasWindowFocus) {
11606            if (hasWindowFocus) {
11607                if (mBlink != null) {
11608                    mBlink.uncancel();
11609                    makeBlink();
11610                }
11611            } else {
11612                if (mBlink != null) {
11613                    mBlink.cancel();
11614                }
11615                if (mInputContentType != null) {
11616                    mInputContentType.enterDown = false;
11617                }
11618                // Order matters! Must be done before onParentLostFocus to rely on isShowingUp
11619                hideControllers();
11620                if (mSuggestionsPopupWindow != null) {
11621                    mSuggestionsPopupWindow.onParentLostFocus();
11622                }
11623
11624                // Don't leave us in the middle of a batch edit.
11625                onEndBatchEdit();
11626            }
11627        }
11628
11629        void onTouchEvent(MotionEvent event) {
11630            if (hasSelectionController()) {
11631                getSelectionController().onTouchEvent(event);
11632            }
11633
11634            if (mShowSuggestionRunnable != null) {
11635                removeCallbacks(mShowSuggestionRunnable);
11636                mShowSuggestionRunnable = null;
11637            }
11638
11639            if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
11640                mLastDownPositionX = event.getX();
11641                mLastDownPositionY = event.getY();
11642
11643                // Reset this state; it will be re-set if super.onTouchEvent
11644                // causes focus to move to the view.
11645                mTouchFocusSelected = false;
11646                mIgnoreActionUpEvent = false;
11647            }
11648        }
11649
11650        void onDraw(Canvas canvas, Layout layout, int cursorOffsetVertical) {
11651            Path highlight = null;
11652            Paint highlightPaint = null;
11653
11654            int selStart = -1, selEnd = -1;
11655            boolean drawCursor = false;
11656
11657            highlightPaint = mHighlightPaint;
11658            //  If there is no movement method, then there can be no selection.
11659            //  Check that first and attempt to skip everything having to do with
11660            //  the cursor.
11661            //  XXX This is not strictly true -- a program could set the
11662            //  selection manually if it really wanted to.
11663            if (mMovement != null && (isFocused() || isPressed())) {
11664                selStart = getSelectionStart();
11665                selEnd = getSelectionEnd();
11666
11667                if (selStart >= 0) {
11668                    if (mHighlightPath == null) mHighlightPath = new Path();
11669
11670                    if (selStart == selEnd) {
11671                        if (isCursorVisible() &&
11672                                (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
11673                            if (mHighlightPathBogus) {
11674                                mHighlightPath.reset();
11675                                mLayout.getCursorPath(selStart, mHighlightPath, mText);
11676                                updateCursorsPositions();
11677                                mHighlightPathBogus = false;
11678                            }
11679
11680                            // XXX should pass to skin instead of drawing directly
11681                            highlightPaint.setColor(mCurTextColor);
11682                            if (mCurrentAlpha != 255) {
11683                                highlightPaint.setAlpha(
11684                                        (mCurrentAlpha * Color.alpha(mCurTextColor)) / 255);
11685                            }
11686                            highlightPaint.setStyle(Paint.Style.STROKE);
11687                            highlight = mHighlightPath;
11688                            drawCursor = mCursorCount > 0;
11689                        }
11690                    } else if (textCanBeSelected()) {
11691                        if (mHighlightPathBogus) {
11692                            mHighlightPath.reset();
11693                            mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
11694                            mHighlightPathBogus = false;
11695                        }
11696
11697                        // XXX should pass to skin instead of drawing directly
11698                        highlightPaint.setColor(mHighlightColor);
11699                        if (mCurrentAlpha != 255) {
11700                            highlightPaint.setAlpha(
11701                                    (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
11702                        }
11703                        highlightPaint.setStyle(Paint.Style.FILL);
11704
11705                        highlight = mHighlightPath;
11706                    }
11707                }
11708            }
11709
11710            final InputMethodState ims = mInputMethodState;
11711            if (ims != null && ims.mBatchEditNesting == 0) {
11712                InputMethodManager imm = InputMethodManager.peekInstance();
11713                if (imm != null) {
11714                    if (imm.isActive(TextView.this)) {
11715                        boolean reported = false;
11716                        if (ims.mContentChanged || ims.mSelectionModeChanged) {
11717                            // We are in extract mode and the content has changed
11718                            // in some way... just report complete new text to the
11719                            // input method.
11720                            reported = reportExtractedText();
11721                        }
11722                        if (!reported && highlight != null) {
11723                            int candStart = -1;
11724                            int candEnd = -1;
11725                            if (mText instanceof Spannable) {
11726                                Spannable sp = (Spannable)mText;
11727                                candStart = EditableInputConnection.getComposingSpanStart(sp);
11728                                candEnd = EditableInputConnection.getComposingSpanEnd(sp);
11729                            }
11730                            imm.updateSelection(TextView.this, selStart, selEnd, candStart, candEnd);
11731                        }
11732                    }
11733
11734                    if (imm.isWatchingCursor(TextView.this) && highlight != null) {
11735                        highlight.computeBounds(ims.mTmpRectF, true);
11736                        ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
11737
11738                        canvas.getMatrix().mapPoints(ims.mTmpOffset);
11739                        ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
11740
11741                        ims.mTmpRectF.offset(0, cursorOffsetVertical);
11742
11743                        ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
11744                                (int)(ims.mTmpRectF.top + 0.5),
11745                                (int)(ims.mTmpRectF.right + 0.5),
11746                                (int)(ims.mTmpRectF.bottom + 0.5));
11747
11748                        imm.updateCursor(TextView.this,
11749                                ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
11750                                ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
11751                    }
11752                }
11753            }
11754
11755            if (mCorrectionHighlighter != null) {
11756                mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
11757            }
11758
11759            if (drawCursor) {
11760                drawCursor(canvas, cursorOffsetVertical);
11761                // Rely on the drawable entirely, do not draw the cursor line.
11762                // Has to be done after the IMM related code above which relies on the highlight.
11763                highlight = null;
11764            }
11765
11766            if (canHaveDisplayList() && canvas.isHardwareAccelerated()) {
11767                final int width = mRight - mLeft;
11768                final int height = mBottom - mTop;
11769
11770                if (mTextDisplayList == null || !mTextDisplayList.isValid() ||
11771                        !mTextDisplayListIsValid) {
11772                    if (mTextDisplayList == null) {
11773                        mTextDisplayList = getHardwareRenderer().createDisplayList("Text");
11774                    }
11775
11776                    final HardwareCanvas hardwareCanvas = mTextDisplayList.start();
11777                    try {
11778                        hardwareCanvas.setViewport(width, height);
11779                        // The dirty rect should always be null for a display list
11780                        hardwareCanvas.onPreDraw(null);
11781                        hardwareCanvas.translate(-mScrollX, -mScrollY);
11782                        layout.draw(hardwareCanvas, highlight, highlightPaint, cursorOffsetVertical);
11783                        hardwareCanvas.translate(mScrollX, mScrollY);
11784                    } finally {
11785                        hardwareCanvas.onPostDraw();
11786                        mTextDisplayList.end();
11787                        mTextDisplayListIsValid = true;
11788                    }
11789                }
11790                canvas.translate(mScrollX, mScrollY);
11791                ((HardwareCanvas) canvas).drawDisplayList(mTextDisplayList, width, height, null,
11792                        DisplayList.FLAG_CLIP_CHILDREN);
11793                canvas.translate(-mScrollX, -mScrollY);
11794            } else {
11795                layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical);
11796            }
11797
11798            if (mMarquee != null && mMarquee.shouldDrawGhost()) {
11799                canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
11800                layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical);
11801            }
11802        }
11803    }
11804}
11805