TextView.java revision 6d3d5057b445069e73fd06adbc11fa412e7c48c3 
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    private static final int PRIORITY = 100;
236    private int mCurrentAlpha = 255;
237
238    final int[] mTempCoords = new int[2];
239    Rect mTempRect;
240
241    private ColorStateList mTextColor;
242    private int mCurTextColor;
243    private ColorStateList mHintTextColor;
244    private ColorStateList mLinkTextColor;
245    private int mCurHintTextColor;
246    private boolean mFreezesText;
247    private boolean mFrozenWithFocus;
248    private boolean mTemporaryDetach;
249    private boolean mDispatchTemporaryDetach;
250
251    private boolean mDiscardNextActionUp = false;
252    private boolean mIgnoreActionUpEvent = false;
253
254    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
255    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
256
257    private float mShadowRadius, mShadowDx, mShadowDy;
258
259    private boolean mPreDrawRegistered;
260
261    private TextUtils.TruncateAt mEllipsize = null;
262
263    // Enum for the "typeface" XML parameter.
264    // TODO: How can we get this from the XML instead of hardcoding it here?
265    private static final int SANS = 1;
266    private static final int SERIF = 2;
267    private static final int MONOSPACE = 3;
268
269    // Bitfield for the "numeric" XML parameter.
270    // TODO: How can we get this from the XML instead of hardcoding it here?
271    private static final int SIGNED = 2;
272    private static final int DECIMAL = 4;
273
274    static class Drawables {
275        final Rect mCompoundRect = new Rect();
276        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
277                mDrawableStart, mDrawableEnd;
278        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
279                mDrawableSizeStart, mDrawableSizeEnd;
280        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
281                mDrawableHeightStart, mDrawableHeightEnd;
282        int mDrawablePadding;
283    }
284    private Drawables mDrawables;
285
286    private DisplayList mTextDisplayList;
287    private boolean mTextDisplayListIsValid;
288
289    private CharSequence mError;
290    private boolean mErrorWasChanged;
291    private ErrorPopup mPopup;
292    /**
293     * This flag is set if the TextView tries to display an error before it
294     * is attached to the window (so its position is still unknown).
295     * It causes the error to be shown later, when onAttachedToWindow()
296     * is called.
297     */
298    private boolean mShowErrorAfterAttach;
299
300    private CharWrapper mCharWrapper = null;
301
302    private boolean mSelectionMoved = false;
303    private boolean mTouchFocusSelected = false;
304
305    private Marquee mMarquee;
306    private boolean mRestartMarquee;
307
308    private int mMarqueeRepeatLimit = 3;
309
310    static class InputContentType {
311        int imeOptions = EditorInfo.IME_NULL;
312        String privateImeOptions;
313        CharSequence imeActionLabel;
314        int imeActionId;
315        Bundle extras;
316        OnEditorActionListener onEditorActionListener;
317        boolean enterDown;
318    }
319    InputContentType mInputContentType;
320
321    static class InputMethodState {
322        Rect mCursorRectInWindow = new Rect();
323        RectF mTmpRectF = new RectF();
324        float[] mTmpOffset = new float[2];
325        ExtractedTextRequest mExtracting;
326        final ExtractedText mTmpExtracted = new ExtractedText();
327        int mBatchEditNesting;
328        boolean mCursorChanged;
329        boolean mSelectionModeChanged;
330        boolean mContentChanged;
331        int mChangedStart, mChangedEnd, mChangedDelta;
332    }
333    InputMethodState mInputMethodState;
334
335    private int mTextSelectHandleLeftRes;
336    private int mTextSelectHandleRightRes;
337    private int mTextSelectHandleRes;
338
339    private int mTextEditSuggestionItemLayout;
340    private SuggestionsPopupWindow mSuggestionsPopupWindow;
341    private SuggestionRangeSpan mSuggestionRangeSpan;
342    private Runnable mShowSuggestionRunnable;
343
344    private int mCursorDrawableRes;
345    private final Drawable[] mCursorDrawable = new Drawable[2];
346    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2 (split)
347
348    private Drawable mSelectHandleLeft;
349    private Drawable mSelectHandleRight;
350    private Drawable mSelectHandleCenter;
351
352    // Global listener that detects changes in the global position of the TextView
353    private PositionListener mPositionListener;
354
355    private float mLastDownPositionX, mLastDownPositionY;
356    private Callback mCustomSelectionActionModeCallback;
357
358    // Set when this TextView gained focus with some text selected. Will start selection mode.
359    private boolean mCreatedWithASelection = false;
360
361    private WordIterator mWordIterator;
362
363    private SpellChecker mSpellChecker;
364
365    // The alignment to pass to Layout, or null if not resolved.
366    private Layout.Alignment mLayoutAlignment;
367
368    // The default value for mTextAlign.
369    private TextAlign mTextAlign = TextAlign.INHERIT;
370
371    private static enum TextAlign {
372        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
373    }
374
375    private boolean mResolvedDrawables = false;
376
377    /**
378     * On some devices the fading edges add a performance penalty if used
379     * extensively in the same layout. This mode indicates how the marquee
380     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
381     */
382    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
383
384    /**
385     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
386     * the layout that should be used when the mode switches.
387     */
388    private Layout mSavedMarqueeModeLayout;
389
390    /**
391     * Draw marquee text with fading edges as usual
392     */
393    private static final int MARQUEE_FADE_NORMAL = 0;
394
395    /**
396     * Draw marquee text as ellipsize end while inactive instead of with the fade.
397     * (Useful for devices where the fade can be expensive if overdone)
398     */
399    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
400
401    /**
402     * Draw marquee text with fading edges because it is currently active/animating.
403     */
404    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
405
406    /*
407     * Kick-start the font cache for the zygote process (to pay the cost of
408     * initializing freetype for our default font only once).
409     */
410    static {
411        Paint p = new Paint();
412        p.setAntiAlias(true);
413        // We don't care about the result, just the side-effect of measuring.
414        p.measureText("H");
415    }
416
417    /**
418     * Interface definition for a callback to be invoked when an action is
419     * performed on the editor.
420     */
421    public interface OnEditorActionListener {
422        /**
423         * Called when an action is being performed.
424         *
425         * @param v The view that was clicked.
426         * @param actionId Identifier of the action.  This will be either the
427         * identifier you supplied, or {@link EditorInfo#IME_NULL
428         * EditorInfo.IME_NULL} if being called due to the enter key
429         * being pressed.
430         * @param event If triggered by an enter key, this is the event;
431         * otherwise, this is null.
432         * @return Return true if you have consumed the action, else false.
433         */
434        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
435    }
436
437    public TextView(Context context) {
438        this(context, null);
439    }
440
441    public TextView(Context context, AttributeSet attrs) {
442        this(context, attrs, com.android.internal.R.attr.textViewStyle);
443    }
444
445    @SuppressWarnings("deprecation")
446    public TextView(Context context, AttributeSet attrs, int defStyle) {
447        super(context, attrs, defStyle);
448        mText = "";
449
450        final Resources res = getResources();
451        final CompatibilityInfo compat = res.getCompatibilityInfo();
452
453        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
454        mTextPaint.density = res.getDisplayMetrics().density;
455        mTextPaint.setCompatibilityScaling(compat.applicationScale);
456
457        // If we get the paint from the skin, we should set it to left, since
458        // the layout always wants it to be left.
459        // mTextPaint.setTextAlign(Paint.Align.LEFT);
460
461        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
462        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
463
464        mMovement = getDefaultMovementMethod();
465        mTransformation = null;
466
467        int textColorHighlight = 0;
468        ColorStateList textColor = null;
469        ColorStateList textColorHint = null;
470        ColorStateList textColorLink = null;
471        int textSize = 15;
472        int typefaceIndex = -1;
473        int styleIndex = -1;
474        boolean allCaps = false;
475
476        final Resources.Theme theme = context.getTheme();
477
478        /*
479         * Look the appearance up without checking first if it exists because
480         * almost every TextView has one and it greatly simplifies the logic
481         * to be able to parse the appearance first and then let specific tags
482         * for this View override it.
483         */
484        TypedArray a = theme.obtainStyledAttributes(
485                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
486        TypedArray appearance = null;
487        int ap = a.getResourceId(
488                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
489        a.recycle();
490        if (ap != -1) {
491            appearance = theme.obtainStyledAttributes(
492                    ap, com.android.internal.R.styleable.TextAppearance);
493        }
494        if (appearance != null) {
495            int n = appearance.getIndexCount();
496            for (int i = 0; i < n; i++) {
497                int attr = appearance.getIndex(i);
498
499                switch (attr) {
500                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
501                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
502                    break;
503
504                case com.android.internal.R.styleable.TextAppearance_textColor:
505                    textColor = appearance.getColorStateList(attr);
506                    break;
507
508                case com.android.internal.R.styleable.TextAppearance_textColorHint:
509                    textColorHint = appearance.getColorStateList(attr);
510                    break;
511
512                case com.android.internal.R.styleable.TextAppearance_textColorLink:
513                    textColorLink = appearance.getColorStateList(attr);
514                    break;
515
516                case com.android.internal.R.styleable.TextAppearance_textSize:
517                    textSize = appearance.getDimensionPixelSize(attr, textSize);
518                    break;
519
520                case com.android.internal.R.styleable.TextAppearance_typeface:
521                    typefaceIndex = appearance.getInt(attr, -1);
522                    break;
523
524                case com.android.internal.R.styleable.TextAppearance_textStyle:
525                    styleIndex = appearance.getInt(attr, -1);
526                    break;
527
528                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
529                    allCaps = appearance.getBoolean(attr, false);
530                    break;
531                }
532            }
533
534            appearance.recycle();
535        }
536
537        boolean editable = getDefaultEditable();
538        CharSequence inputMethod = null;
539        int numeric = 0;
540        CharSequence digits = null;
541        boolean phone = false;
542        boolean autotext = false;
543        int autocap = -1;
544        int buffertype = 0;
545        boolean selectallonfocus = false;
546        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
547            drawableBottom = null, drawableStart = null, drawableEnd = null;
548        int drawablePadding = 0;
549        int ellipsize = -1;
550        boolean singleLine = false;
551        int maxlength = -1;
552        CharSequence text = "";
553        CharSequence hint = null;
554        int shadowcolor = 0;
555        float dx = 0, dy = 0, r = 0;
556        boolean password = false;
557        int inputType = EditorInfo.TYPE_NULL;
558
559        a = theme.obtainStyledAttributes(
560                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
561
562        int n = a.getIndexCount();
563        for (int i = 0; i < n; i++) {
564            int attr = a.getIndex(i);
565
566            switch (attr) {
567            case com.android.internal.R.styleable.TextView_editable:
568                editable = a.getBoolean(attr, editable);
569                break;
570
571            case com.android.internal.R.styleable.TextView_inputMethod:
572                inputMethod = a.getText(attr);
573                break;
574
575            case com.android.internal.R.styleable.TextView_numeric:
576                numeric = a.getInt(attr, numeric);
577                break;
578
579            case com.android.internal.R.styleable.TextView_digits:
580                digits = a.getText(attr);
581                break;
582
583            case com.android.internal.R.styleable.TextView_phoneNumber:
584                phone = a.getBoolean(attr, phone);
585                break;
586
587            case com.android.internal.R.styleable.TextView_autoText:
588                autotext = a.getBoolean(attr, autotext);
589                break;
590
591            case com.android.internal.R.styleable.TextView_capitalize:
592                autocap = a.getInt(attr, autocap);
593                break;
594
595            case com.android.internal.R.styleable.TextView_bufferType:
596                buffertype = a.getInt(attr, buffertype);
597                break;
598
599            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
600                selectallonfocus = a.getBoolean(attr, selectallonfocus);
601                break;
602
603            case com.android.internal.R.styleable.TextView_autoLink:
604                mAutoLinkMask = a.getInt(attr, 0);
605                break;
606
607            case com.android.internal.R.styleable.TextView_linksClickable:
608                mLinksClickable = a.getBoolean(attr, true);
609                break;
610
611//            TODO uncomment when this attribute is made public in the next release
612//                 also add TextView_showSoftInputOnFocus to the list of attributes above
613//            case com.android.internal.R.styleable.TextView_showSoftInputOnFocus:
614//                setShowSoftInputOnFocus(a.getBoolean(attr, true));
615//                break;
616
617            case com.android.internal.R.styleable.TextView_drawableLeft:
618                drawableLeft = a.getDrawable(attr);
619                break;
620
621            case com.android.internal.R.styleable.TextView_drawableTop:
622                drawableTop = a.getDrawable(attr);
623                break;
624
625            case com.android.internal.R.styleable.TextView_drawableRight:
626                drawableRight = a.getDrawable(attr);
627                break;
628
629            case com.android.internal.R.styleable.TextView_drawableBottom:
630                drawableBottom = a.getDrawable(attr);
631                break;
632
633            case com.android.internal.R.styleable.TextView_drawableStart:
634                drawableStart = a.getDrawable(attr);
635                break;
636
637            case com.android.internal.R.styleable.TextView_drawableEnd:
638                drawableEnd = a.getDrawable(attr);
639                break;
640
641            case com.android.internal.R.styleable.TextView_drawablePadding:
642                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
643                break;
644
645            case com.android.internal.R.styleable.TextView_maxLines:
646                setMaxLines(a.getInt(attr, -1));
647                break;
648
649            case com.android.internal.R.styleable.TextView_maxHeight:
650                setMaxHeight(a.getDimensionPixelSize(attr, -1));
651                break;
652
653            case com.android.internal.R.styleable.TextView_lines:
654                setLines(a.getInt(attr, -1));
655                break;
656
657            case com.android.internal.R.styleable.TextView_height:
658                setHeight(a.getDimensionPixelSize(attr, -1));
659                break;
660
661            case com.android.internal.R.styleable.TextView_minLines:
662                setMinLines(a.getInt(attr, -1));
663                break;
664
665            case com.android.internal.R.styleable.TextView_minHeight:
666                setMinHeight(a.getDimensionPixelSize(attr, -1));
667                break;
668
669            case com.android.internal.R.styleable.TextView_maxEms:
670                setMaxEms(a.getInt(attr, -1));
671                break;
672
673            case com.android.internal.R.styleable.TextView_maxWidth:
674                setMaxWidth(a.getDimensionPixelSize(attr, -1));
675                break;
676
677            case com.android.internal.R.styleable.TextView_ems:
678                setEms(a.getInt(attr, -1));
679                break;
680
681            case com.android.internal.R.styleable.TextView_width:
682                setWidth(a.getDimensionPixelSize(attr, -1));
683                break;
684
685            case com.android.internal.R.styleable.TextView_minEms:
686                setMinEms(a.getInt(attr, -1));
687                break;
688
689            case com.android.internal.R.styleable.TextView_minWidth:
690                setMinWidth(a.getDimensionPixelSize(attr, -1));
691                break;
692
693            case com.android.internal.R.styleable.TextView_gravity:
694                setGravity(a.getInt(attr, -1));
695                break;
696
697            case com.android.internal.R.styleable.TextView_hint:
698                hint = a.getText(attr);
699                break;
700
701            case com.android.internal.R.styleable.TextView_text:
702                text = a.getText(attr);
703                break;
704
705            case com.android.internal.R.styleable.TextView_scrollHorizontally:
706                if (a.getBoolean(attr, false)) {
707                    setHorizontallyScrolling(true);
708                }
709                break;
710
711            case com.android.internal.R.styleable.TextView_singleLine:
712                singleLine = a.getBoolean(attr, singleLine);
713                break;
714
715            case com.android.internal.R.styleable.TextView_ellipsize:
716                ellipsize = a.getInt(attr, ellipsize);
717                break;
718
719            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
720                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
721                break;
722
723            case com.android.internal.R.styleable.TextView_includeFontPadding:
724                if (!a.getBoolean(attr, true)) {
725                    setIncludeFontPadding(false);
726                }
727                break;
728
729            case com.android.internal.R.styleable.TextView_cursorVisible:
730                if (!a.getBoolean(attr, true)) {
731                    setCursorVisible(false);
732                }
733                break;
734
735            case com.android.internal.R.styleable.TextView_maxLength:
736                maxlength = a.getInt(attr, -1);
737                break;
738
739            case com.android.internal.R.styleable.TextView_textScaleX:
740                setTextScaleX(a.getFloat(attr, 1.0f));
741                break;
742
743            case com.android.internal.R.styleable.TextView_freezesText:
744                mFreezesText = a.getBoolean(attr, false);
745                break;
746
747            case com.android.internal.R.styleable.TextView_shadowColor:
748                shadowcolor = a.getInt(attr, 0);
749                break;
750
751            case com.android.internal.R.styleable.TextView_shadowDx:
752                dx = a.getFloat(attr, 0);
753                break;
754
755            case com.android.internal.R.styleable.TextView_shadowDy:
756                dy = a.getFloat(attr, 0);
757                break;
758
759            case com.android.internal.R.styleable.TextView_shadowRadius:
760                r = a.getFloat(attr, 0);
761                break;
762
763            case com.android.internal.R.styleable.TextView_enabled:
764                setEnabled(a.getBoolean(attr, isEnabled()));
765                break;
766
767            case com.android.internal.R.styleable.TextView_textColorHighlight:
768                textColorHighlight = a.getColor(attr, textColorHighlight);
769                break;
770
771            case com.android.internal.R.styleable.TextView_textColor:
772                textColor = a.getColorStateList(attr);
773                break;
774
775            case com.android.internal.R.styleable.TextView_textColorHint:
776                textColorHint = a.getColorStateList(attr);
777                break;
778
779            case com.android.internal.R.styleable.TextView_textColorLink:
780                textColorLink = a.getColorStateList(attr);
781                break;
782
783            case com.android.internal.R.styleable.TextView_textSize:
784                textSize = a.getDimensionPixelSize(attr, textSize);
785                break;
786
787            case com.android.internal.R.styleable.TextView_typeface:
788                typefaceIndex = a.getInt(attr, typefaceIndex);
789                break;
790
791            case com.android.internal.R.styleable.TextView_textStyle:
792                styleIndex = a.getInt(attr, styleIndex);
793                break;
794
795            case com.android.internal.R.styleable.TextView_password:
796                password = a.getBoolean(attr, password);
797                break;
798
799            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
800                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
801                break;
802
803            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
804                mSpacingMult = a.getFloat(attr, mSpacingMult);
805                break;
806
807            case com.android.internal.R.styleable.TextView_inputType:
808                inputType = a.getInt(attr, mInputType);
809                break;
810
811            case com.android.internal.R.styleable.TextView_imeOptions:
812                if (mInputContentType == null) {
813                    mInputContentType = new InputContentType();
814                }
815                mInputContentType.imeOptions = a.getInt(attr,
816                        mInputContentType.imeOptions);
817                break;
818
819            case com.android.internal.R.styleable.TextView_imeActionLabel:
820                if (mInputContentType == null) {
821                    mInputContentType = new InputContentType();
822                }
823                mInputContentType.imeActionLabel = a.getText(attr);
824                break;
825
826            case com.android.internal.R.styleable.TextView_imeActionId:
827                if (mInputContentType == null) {
828                    mInputContentType = new InputContentType();
829                }
830                mInputContentType.imeActionId = a.getInt(attr,
831                        mInputContentType.imeActionId);
832                break;
833
834            case com.android.internal.R.styleable.TextView_privateImeOptions:
835                setPrivateImeOptions(a.getString(attr));
836                break;
837
838            case com.android.internal.R.styleable.TextView_editorExtras:
839                try {
840                    setInputExtras(a.getResourceId(attr, 0));
841                } catch (XmlPullParserException e) {
842                    Log.w(LOG_TAG, "Failure reading input extras", e);
843                } catch (IOException e) {
844                    Log.w(LOG_TAG, "Failure reading input extras", e);
845                }
846                break;
847
848            case com.android.internal.R.styleable.TextView_textCursorDrawable:
849                mCursorDrawableRes = a.getResourceId(attr, 0);
850                break;
851
852            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
853                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
854                break;
855
856            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
857                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
858                break;
859
860            case com.android.internal.R.styleable.TextView_textSelectHandle:
861                mTextSelectHandleRes = a.getResourceId(attr, 0);
862                break;
863
864            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
865                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
866                break;
867
868            case com.android.internal.R.styleable.TextView_textIsSelectable:
869                mTextIsSelectable = a.getBoolean(attr, false);
870                break;
871
872            case com.android.internal.R.styleable.TextView_textAllCaps:
873                allCaps = a.getBoolean(attr, false);
874                break;
875            }
876        }
877        a.recycle();
878
879        BufferType bufferType = BufferType.EDITABLE;
880
881        final int variation =
882                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
883        final boolean passwordInputType = variation
884                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
885        final boolean webPasswordInputType = variation
886                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
887        final boolean numberPasswordInputType = variation
888                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
889
890        if (inputMethod != null) {
891            Class<?> c;
892
893            try {
894                c = Class.forName(inputMethod.toString());
895            } catch (ClassNotFoundException ex) {
896                throw new RuntimeException(ex);
897            }
898
899            try {
900                mInput = (KeyListener) c.newInstance();
901            } catch (InstantiationException ex) {
902                throw new RuntimeException(ex);
903            } catch (IllegalAccessException ex) {
904                throw new RuntimeException(ex);
905            }
906            try {
907                mInputType = inputType != EditorInfo.TYPE_NULL
908                        ? inputType
909                        : mInput.getInputType();
910            } catch (IncompatibleClassChangeError e) {
911                mInputType = EditorInfo.TYPE_CLASS_TEXT;
912            }
913        } else if (digits != null) {
914            mInput = DigitsKeyListener.getInstance(digits.toString());
915            // If no input type was specified, we will default to generic
916            // text, since we can't tell the IME about the set of digits
917            // that was selected.
918            mInputType = inputType != EditorInfo.TYPE_NULL
919                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
920        } else if (inputType != EditorInfo.TYPE_NULL) {
921            setInputType(inputType, true);
922            // If set, the input type overrides what was set using the deprecated singleLine flag.
923            singleLine = !isMultilineInputType(inputType);
924        } else if (phone) {
925            mInput = DialerKeyListener.getInstance();
926            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
927        } else if (numeric != 0) {
928            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
929                                                   (numeric & DECIMAL) != 0);
930            inputType = EditorInfo.TYPE_CLASS_NUMBER;
931            if ((numeric & SIGNED) != 0) {
932                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
933            }
934            if ((numeric & DECIMAL) != 0) {
935                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
936            }
937            mInputType = inputType;
938        } else if (autotext || autocap != -1) {
939            TextKeyListener.Capitalize cap;
940
941            inputType = EditorInfo.TYPE_CLASS_TEXT;
942
943            switch (autocap) {
944            case 1:
945                cap = TextKeyListener.Capitalize.SENTENCES;
946                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
947                break;
948
949            case 2:
950                cap = TextKeyListener.Capitalize.WORDS;
951                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
952                break;
953
954            case 3:
955                cap = TextKeyListener.Capitalize.CHARACTERS;
956                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
957                break;
958
959            default:
960                cap = TextKeyListener.Capitalize.NONE;
961                break;
962            }
963
964            mInput = TextKeyListener.getInstance(autotext, cap);
965            mInputType = inputType;
966        } else if (mTextIsSelectable) {
967            // Prevent text changes from keyboard.
968            mInputType = EditorInfo.TYPE_NULL;
969            mInput = null;
970            bufferType = BufferType.SPANNABLE;
971            // Required to request focus while in touch mode.
972            setFocusableInTouchMode(true);
973            // So that selection can be changed using arrow keys and touch is handled.
974            setMovementMethod(ArrowKeyMovementMethod.getInstance());
975        } else if (editable) {
976            mInput = TextKeyListener.getInstance();
977            mInputType = EditorInfo.TYPE_CLASS_TEXT;
978        } else {
979            mInput = null;
980
981            switch (buffertype) {
982                case 0:
983                    bufferType = BufferType.NORMAL;
984                    break;
985                case 1:
986                    bufferType = BufferType.SPANNABLE;
987                    break;
988                case 2:
989                    bufferType = BufferType.EDITABLE;
990                    break;
991            }
992        }
993
994        // mInputType has been set from inputType, possibly modified by mInputMethod.
995        // Specialize mInputType to [web]password if we have a text class and the original input
996        // type was a password.
997        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
998            if (password || passwordInputType) {
999                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1000                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
1001            }
1002            if (webPasswordInputType) {
1003                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1004                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
1005            }
1006        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1007            if (numberPasswordInputType) {
1008                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1009                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1010            }
1011        }
1012
1013        if (selectallonfocus) {
1014            mSelectAllOnFocus = true;
1015
1016            if (bufferType == BufferType.NORMAL)
1017                bufferType = BufferType.SPANNABLE;
1018        }
1019
1020        setCompoundDrawablesWithIntrinsicBounds(
1021            drawableLeft, drawableTop, drawableRight, drawableBottom);
1022        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1023        setCompoundDrawablePadding(drawablePadding);
1024
1025        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1026        // of lines of height are unchanged for multi-line TextViews.
1027        setInputTypeSingleLine(singleLine);
1028        applySingleLine(singleLine, singleLine, singleLine);
1029
1030        if (singleLine && mInput == null && ellipsize < 0) {
1031                ellipsize = 3; // END
1032        }
1033
1034        switch (ellipsize) {
1035            case 1:
1036                setEllipsize(TextUtils.TruncateAt.START);
1037                break;
1038            case 2:
1039                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1040                break;
1041            case 3:
1042                setEllipsize(TextUtils.TruncateAt.END);
1043                break;
1044            case 4:
1045                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1046                    setHorizontalFadingEdgeEnabled(true);
1047                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1048                } else {
1049                    setHorizontalFadingEdgeEnabled(false);
1050                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1051                }
1052                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1053                break;
1054        }
1055
1056        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1057        setHintTextColor(textColorHint);
1058        setLinkTextColor(textColorLink);
1059        if (textColorHighlight != 0) {
1060            setHighlightColor(textColorHighlight);
1061        }
1062        setRawTextSize(textSize);
1063
1064        if (allCaps) {
1065            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1066        }
1067
1068        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1069            setTransformationMethod(PasswordTransformationMethod.getInstance());
1070            typefaceIndex = MONOSPACE;
1071        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1072                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1073            typefaceIndex = MONOSPACE;
1074        }
1075
1076        setTypefaceByIndex(typefaceIndex, styleIndex);
1077
1078        if (shadowcolor != 0) {
1079            setShadowLayer(r, dx, dy, shadowcolor);
1080        }
1081
1082        if (maxlength >= 0) {
1083            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1084        } else {
1085            setFilters(NO_FILTERS);
1086        }
1087
1088        setText(text, bufferType);
1089        if (hint != null) setHint(hint);
1090
1091        /*
1092         * Views are not normally focusable unless specified to be.
1093         * However, TextViews that have input or movement methods *are*
1094         * focusable by default.
1095         */
1096        a = context.obtainStyledAttributes(attrs,
1097                                           com.android.internal.R.styleable.View,
1098                                           defStyle, 0);
1099
1100        boolean focusable = mMovement != null || mInput != null;
1101        boolean clickable = focusable;
1102        boolean longClickable = focusable;
1103
1104        n = a.getIndexCount();
1105        for (int i = 0; i < n; i++) {
1106            int attr = a.getIndex(i);
1107
1108            switch (attr) {
1109            case com.android.internal.R.styleable.View_focusable:
1110                focusable = a.getBoolean(attr, focusable);
1111                break;
1112
1113            case com.android.internal.R.styleable.View_clickable:
1114                clickable = a.getBoolean(attr, clickable);
1115                break;
1116
1117            case com.android.internal.R.styleable.View_longClickable:
1118                longClickable = a.getBoolean(attr, longClickable);
1119                break;
1120            }
1121        }
1122        a.recycle();
1123
1124        setFocusable(focusable);
1125        setClickable(clickable);
1126        setLongClickable(longClickable);
1127
1128        prepareCursorControllers();
1129    }
1130
1131    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1132        Typeface tf = null;
1133        switch (typefaceIndex) {
1134            case SANS:
1135                tf = Typeface.SANS_SERIF;
1136                break;
1137
1138            case SERIF:
1139                tf = Typeface.SERIF;
1140                break;
1141
1142            case MONOSPACE:
1143                tf = Typeface.MONOSPACE;
1144                break;
1145        }
1146
1147        setTypeface(tf, styleIndex);
1148    }
1149
1150    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1151        boolean hasRelativeDrawables = (start != null) || (end != null);
1152        if (hasRelativeDrawables) {
1153            Drawables dr = mDrawables;
1154            if (dr == null) {
1155                mDrawables = dr = new Drawables();
1156            }
1157            final Rect compoundRect = dr.mCompoundRect;
1158            int[] state = getDrawableState();
1159            if (start != null) {
1160                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1161                start.setState(state);
1162                start.copyBounds(compoundRect);
1163                start.setCallback(this);
1164
1165                dr.mDrawableStart = start;
1166                dr.mDrawableSizeStart = compoundRect.width();
1167                dr.mDrawableHeightStart = compoundRect.height();
1168            } else {
1169                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1170            }
1171            if (end != null) {
1172                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1173                end.setState(state);
1174                end.copyBounds(compoundRect);
1175                end.setCallback(this);
1176
1177                dr.mDrawableEnd = end;
1178                dr.mDrawableSizeEnd = compoundRect.width();
1179                dr.mDrawableHeightEnd = compoundRect.height();
1180            } else {
1181                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1182            }
1183        }
1184    }
1185
1186    @Override
1187    public void setEnabled(boolean enabled) {
1188        if (enabled == isEnabled()) {
1189            return;
1190        }
1191
1192        if (!enabled) {
1193            // Hide the soft input if the currently active TextView is disabled
1194            InputMethodManager imm = InputMethodManager.peekInstance();
1195            if (imm != null && imm.isActive(this)) {
1196                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1197            }
1198        }
1199
1200        super.setEnabled(enabled);
1201
1202        if (enabled) {
1203            // Make sure IME is updated with current editor info.
1204            InputMethodManager imm = InputMethodManager.peekInstance();
1205            if (imm != null) imm.restartInput(this);
1206        }
1207
1208        mTextDisplayListIsValid = false;
1209        prepareCursorControllers();
1210
1211        // start or stop the cursor blinking as appropriate
1212        makeBlink();
1213    }
1214
1215    /**
1216     * Sets the typeface and style in which the text should be displayed,
1217     * and turns on the fake bold and italic bits in the Paint if the
1218     * Typeface that you provided does not have all the bits in the
1219     * style that you specified.
1220     *
1221     * @attr ref android.R.styleable#TextView_typeface
1222     * @attr ref android.R.styleable#TextView_textStyle
1223     */
1224    public void setTypeface(Typeface tf, int style) {
1225        if (style > 0) {
1226            if (tf == null) {
1227                tf = Typeface.defaultFromStyle(style);
1228            } else {
1229                tf = Typeface.create(tf, style);
1230            }
1231
1232            setTypeface(tf);
1233            // now compute what (if any) algorithmic styling is needed
1234            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1235            int need = style & ~typefaceStyle;
1236            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1237            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1238        } else {
1239            mTextPaint.setFakeBoldText(false);
1240            mTextPaint.setTextSkewX(0);
1241            setTypeface(tf);
1242        }
1243    }
1244
1245    /**
1246     * Subclasses override this to specify that they have a KeyListener
1247     * by default even if not specifically called for in the XML options.
1248     */
1249    protected boolean getDefaultEditable() {
1250        return false;
1251    }
1252
1253    /**
1254     * Subclasses override this to specify a default movement method.
1255     */
1256    protected MovementMethod getDefaultMovementMethod() {
1257        return null;
1258    }
1259
1260    /**
1261     * Return the text the TextView is displaying. If setText() was called with
1262     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1263     * the return value from this method to Spannable or Editable, respectively.
1264     *
1265     * Note: The content of the return value should not be modified. If you want
1266     * a modifiable one, you should make your own copy first.
1267     */
1268    @ViewDebug.CapturedViewProperty
1269    public CharSequence getText() {
1270        return mText;
1271    }
1272
1273    /**
1274     * Returns the length, in characters, of the text managed by this TextView
1275     */
1276    public int length() {
1277        return mText.length();
1278    }
1279
1280    /**
1281     * Return the text the TextView is displaying as an Editable object.  If
1282     * the text is not editable, null is returned.
1283     *
1284     * @see #getText
1285     */
1286    public Editable getEditableText() {
1287        return (mText instanceof Editable) ? (Editable)mText : null;
1288    }
1289
1290    /**
1291     * @return the height of one standard line in pixels.  Note that markup
1292     * within the text can cause individual lines to be taller or shorter
1293     * than this height, and the layout may contain additional first-
1294     * or last-line padding.
1295     */
1296    public int getLineHeight() {
1297        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1298    }
1299
1300    /**
1301     * @return the Layout that is currently being used to display the text.
1302     * This can be null if the text or width has recently changes.
1303     */
1304    public final Layout getLayout() {
1305        return mLayout;
1306    }
1307
1308    /**
1309     * @return the current key listener for this TextView.
1310     * This will frequently be null for non-EditText TextViews.
1311     */
1312    public final KeyListener getKeyListener() {
1313        return mInput;
1314    }
1315
1316    /**
1317     * Sets the key listener to be used with this TextView.  This can be null
1318     * to disallow user input.  Note that this method has significant and
1319     * subtle interactions with soft keyboards and other input method:
1320     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1321     * for important details.  Calling this method will replace the current
1322     * content type of the text view with the content type returned by the
1323     * key listener.
1324     * <p>
1325     * Be warned that if you want a TextView with a key listener or movement
1326     * method not to be focusable, or if you want a TextView without a
1327     * key listener or movement method to be focusable, you must call
1328     * {@link #setFocusable} again after calling this to get the focusability
1329     * back the way you want it.
1330     *
1331     * @attr ref android.R.styleable#TextView_numeric
1332     * @attr ref android.R.styleable#TextView_digits
1333     * @attr ref android.R.styleable#TextView_phoneNumber
1334     * @attr ref android.R.styleable#TextView_inputMethod
1335     * @attr ref android.R.styleable#TextView_capitalize
1336     * @attr ref android.R.styleable#TextView_autoText
1337     */
1338    public void setKeyListener(KeyListener input) {
1339        setKeyListenerOnly(input);
1340        fixFocusableAndClickableSettings();
1341
1342        if (input != null) {
1343            try {
1344                mInputType = mInput.getInputType();
1345            } catch (IncompatibleClassChangeError e) {
1346                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1347            }
1348            // Change inputType, without affecting transformation.
1349            // No need to applySingleLine since mSingleLine is unchanged.
1350            setInputTypeSingleLine(mSingleLine);
1351        } else {
1352            mInputType = EditorInfo.TYPE_NULL;
1353        }
1354
1355        InputMethodManager imm = InputMethodManager.peekInstance();
1356        if (imm != null) imm.restartInput(this);
1357    }
1358
1359    private void setKeyListenerOnly(KeyListener input) {
1360        mInput = input;
1361        if (mInput != null && !(mText instanceof Editable))
1362            setText(mText);
1363
1364        setFilters((Editable) mText, mFilters);
1365    }
1366
1367    /**
1368     * @return the movement method being used for this TextView.
1369     * This will frequently be null for non-EditText TextViews.
1370     */
1371    public final MovementMethod getMovementMethod() {
1372        return mMovement;
1373    }
1374
1375    /**
1376     * Sets the movement method (arrow key handler) to be used for
1377     * this TextView.  This can be null to disallow using the arrow keys
1378     * to move the cursor or scroll the view.
1379     * <p>
1380     * Be warned that if you want a TextView with a key listener or movement
1381     * method not to be focusable, or if you want a TextView without a
1382     * key listener or movement method to be focusable, you must call
1383     * {@link #setFocusable} again after calling this to get the focusability
1384     * back the way you want it.
1385     */
1386    public final void setMovementMethod(MovementMethod movement) {
1387        mMovement = movement;
1388
1389        if (mMovement != null && !(mText instanceof Spannable))
1390            setText(mText);
1391
1392        fixFocusableAndClickableSettings();
1393
1394        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1395        prepareCursorControllers();
1396    }
1397
1398    private void fixFocusableAndClickableSettings() {
1399        if ((mMovement != null) || mInput != null) {
1400            setFocusable(true);
1401            setClickable(true);
1402            setLongClickable(true);
1403        } else {
1404            setFocusable(false);
1405            setClickable(false);
1406            setLongClickable(false);
1407        }
1408    }
1409
1410    /**
1411     * @return the current transformation method for this TextView.
1412     * This will frequently be null except for single-line and password
1413     * fields.
1414     */
1415    public final TransformationMethod getTransformationMethod() {
1416        return mTransformation;
1417    }
1418
1419    /**
1420     * Sets the transformation that is applied to the text that this
1421     * TextView is displaying.
1422     *
1423     * @attr ref android.R.styleable#TextView_password
1424     * @attr ref android.R.styleable#TextView_singleLine
1425     */
1426    public final void setTransformationMethod(TransformationMethod method) {
1427        if (method == mTransformation) {
1428            // Avoid the setText() below if the transformation is
1429            // the same.
1430            return;
1431        }
1432        if (mTransformation != null) {
1433            if (mText instanceof Spannable) {
1434                ((Spannable) mText).removeSpan(mTransformation);
1435            }
1436        }
1437
1438        mTransformation = method;
1439
1440        if (method instanceof TransformationMethod2) {
1441            TransformationMethod2 method2 = (TransformationMethod2) method;
1442            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1443            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1444        } else {
1445            mAllowTransformationLengthChange = false;
1446        }
1447
1448        setText(mText);
1449    }
1450
1451    /**
1452     * Returns the top padding of the view, plus space for the top
1453     * Drawable if any.
1454     */
1455    public int getCompoundPaddingTop() {
1456        final Drawables dr = mDrawables;
1457        if (dr == null || dr.mDrawableTop == null) {
1458            return mPaddingTop;
1459        } else {
1460            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1461        }
1462    }
1463
1464    /**
1465     * Returns the bottom padding of the view, plus space for the bottom
1466     * Drawable if any.
1467     */
1468    public int getCompoundPaddingBottom() {
1469        final Drawables dr = mDrawables;
1470        if (dr == null || dr.mDrawableBottom == null) {
1471            return mPaddingBottom;
1472        } else {
1473            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1474        }
1475    }
1476
1477    /**
1478     * Returns the left padding of the view, plus space for the left
1479     * Drawable if any.
1480     */
1481    public int getCompoundPaddingLeft() {
1482        final Drawables dr = mDrawables;
1483        if (dr == null || dr.mDrawableLeft == null) {
1484            return mPaddingLeft;
1485        } else {
1486            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1487        }
1488    }
1489
1490    /**
1491     * Returns the right padding of the view, plus space for the right
1492     * Drawable if any.
1493     */
1494    public int getCompoundPaddingRight() {
1495        final Drawables dr = mDrawables;
1496        if (dr == null || dr.mDrawableRight == null) {
1497            return mPaddingRight;
1498        } else {
1499            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1500        }
1501    }
1502
1503    /**
1504     * Returns the start padding of the view, plus space for the start
1505     * Drawable if any.
1506     *
1507     * @hide
1508     */
1509    public int getCompoundPaddingStart() {
1510        resolveDrawables();
1511        switch(getResolvedLayoutDirection()) {
1512            default:
1513            case LAYOUT_DIRECTION_LTR:
1514                return getCompoundPaddingLeft();
1515            case LAYOUT_DIRECTION_RTL:
1516                return getCompoundPaddingRight();
1517        }
1518    }
1519
1520    /**
1521     * Returns the end padding of the view, plus space for the end
1522     * Drawable if any.
1523     *
1524     * @hide
1525     */
1526    public int getCompoundPaddingEnd() {
1527        resolveDrawables();
1528        switch(getResolvedLayoutDirection()) {
1529            default:
1530            case LAYOUT_DIRECTION_LTR:
1531                return getCompoundPaddingRight();
1532            case LAYOUT_DIRECTION_RTL:
1533                return getCompoundPaddingLeft();
1534        }
1535    }
1536
1537    /**
1538     * Returns the extended top padding of the view, including both the
1539     * top Drawable if any and any extra space to keep more than maxLines
1540     * of text from showing.  It is only valid to call this after measuring.
1541     */
1542    public int getExtendedPaddingTop() {
1543        if (mMaxMode != LINES) {
1544            return getCompoundPaddingTop();
1545        }
1546
1547        if (mLayout.getLineCount() <= mMaximum) {
1548            return getCompoundPaddingTop();
1549        }
1550
1551        int top = getCompoundPaddingTop();
1552        int bottom = getCompoundPaddingBottom();
1553        int viewht = getHeight() - top - bottom;
1554        int layoutht = mLayout.getLineTop(mMaximum);
1555
1556        if (layoutht >= viewht) {
1557            return top;
1558        }
1559
1560        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1561        if (gravity == Gravity.TOP) {
1562            return top;
1563        } else if (gravity == Gravity.BOTTOM) {
1564            return top + viewht - layoutht;
1565        } else { // (gravity == Gravity.CENTER_VERTICAL)
1566            return top + (viewht - layoutht) / 2;
1567        }
1568    }
1569
1570    /**
1571     * Returns the extended bottom padding of the view, including both the
1572     * bottom Drawable if any and any extra space to keep more than maxLines
1573     * of text from showing.  It is only valid to call this after measuring.
1574     */
1575    public int getExtendedPaddingBottom() {
1576        if (mMaxMode != LINES) {
1577            return getCompoundPaddingBottom();
1578        }
1579
1580        if (mLayout.getLineCount() <= mMaximum) {
1581            return getCompoundPaddingBottom();
1582        }
1583
1584        int top = getCompoundPaddingTop();
1585        int bottom = getCompoundPaddingBottom();
1586        int viewht = getHeight() - top - bottom;
1587        int layoutht = mLayout.getLineTop(mMaximum);
1588
1589        if (layoutht >= viewht) {
1590            return bottom;
1591        }
1592
1593        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1594        if (gravity == Gravity.TOP) {
1595            return bottom + viewht - layoutht;
1596        } else if (gravity == Gravity.BOTTOM) {
1597            return bottom;
1598        } else { // (gravity == Gravity.CENTER_VERTICAL)
1599            return bottom + (viewht - layoutht) / 2;
1600        }
1601    }
1602
1603    /**
1604     * Returns the total left padding of the view, including the left
1605     * Drawable if any.
1606     */
1607    public int getTotalPaddingLeft() {
1608        return getCompoundPaddingLeft();
1609    }
1610
1611    /**
1612     * Returns the total right padding of the view, including the right
1613     * Drawable if any.
1614     */
1615    public int getTotalPaddingRight() {
1616        return getCompoundPaddingRight();
1617    }
1618
1619    /**
1620     * Returns the total start padding of the view, including the start
1621     * Drawable if any.
1622     *
1623     * @hide
1624     */
1625    public int getTotalPaddingStart() {
1626        return getCompoundPaddingStart();
1627    }
1628
1629    /**
1630     * Returns the total end padding of the view, including the end
1631     * Drawable if any.
1632     *
1633     * @hide
1634     */
1635    public int getTotalPaddingEnd() {
1636        return getCompoundPaddingEnd();
1637    }
1638
1639    /**
1640     * Returns the total top padding of the view, including the top
1641     * Drawable if any, the extra space to keep more than maxLines
1642     * from showing, and the vertical offset for gravity, if any.
1643     */
1644    public int getTotalPaddingTop() {
1645        return getExtendedPaddingTop() + getVerticalOffset(true);
1646    }
1647
1648    /**
1649     * Returns the total bottom padding of the view, including the bottom
1650     * Drawable if any, the extra space to keep more than maxLines
1651     * from showing, and the vertical offset for gravity, if any.
1652     */
1653    public int getTotalPaddingBottom() {
1654        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1655    }
1656
1657    /**
1658     * Sets the Drawables (if any) to appear to the left of, above,
1659     * to the right of, and below the text.  Use null if you do not
1660     * want a Drawable there.  The Drawables must already have had
1661     * {@link Drawable#setBounds} called.
1662     *
1663     * @attr ref android.R.styleable#TextView_drawableLeft
1664     * @attr ref android.R.styleable#TextView_drawableTop
1665     * @attr ref android.R.styleable#TextView_drawableRight
1666     * @attr ref android.R.styleable#TextView_drawableBottom
1667     */
1668    public void setCompoundDrawables(Drawable left, Drawable top,
1669                                     Drawable right, Drawable bottom) {
1670        Drawables dr = mDrawables;
1671
1672        final boolean drawables = left != null || top != null
1673                || right != null || bottom != null;
1674
1675        if (!drawables) {
1676            // Clearing drawables...  can we free the data structure?
1677            if (dr != null) {
1678                if (dr.mDrawablePadding == 0) {
1679                    mDrawables = null;
1680                } else {
1681                    // We need to retain the last set padding, so just clear
1682                    // out all of the fields in the existing structure.
1683                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1684                    dr.mDrawableLeft = null;
1685                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1686                    dr.mDrawableTop = null;
1687                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1688                    dr.mDrawableRight = null;
1689                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1690                    dr.mDrawableBottom = null;
1691                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1692                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1693                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1694                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1695                }
1696            }
1697        } else {
1698            if (dr == null) {
1699                mDrawables = dr = new Drawables();
1700            }
1701
1702            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1703                dr.mDrawableLeft.setCallback(null);
1704            }
1705            dr.mDrawableLeft = left;
1706
1707            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1708                dr.mDrawableTop.setCallback(null);
1709            }
1710            dr.mDrawableTop = top;
1711
1712            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1713                dr.mDrawableRight.setCallback(null);
1714            }
1715            dr.mDrawableRight = right;
1716
1717            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1718                dr.mDrawableBottom.setCallback(null);
1719            }
1720            dr.mDrawableBottom = bottom;
1721
1722            final Rect compoundRect = dr.mCompoundRect;
1723            int[] state;
1724
1725            state = getDrawableState();
1726
1727            if (left != null) {
1728                left.setState(state);
1729                left.copyBounds(compoundRect);
1730                left.setCallback(this);
1731                dr.mDrawableSizeLeft = compoundRect.width();
1732                dr.mDrawableHeightLeft = compoundRect.height();
1733            } else {
1734                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1735            }
1736
1737            if (right != null) {
1738                right.setState(state);
1739                right.copyBounds(compoundRect);
1740                right.setCallback(this);
1741                dr.mDrawableSizeRight = compoundRect.width();
1742                dr.mDrawableHeightRight = compoundRect.height();
1743            } else {
1744                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1745            }
1746
1747            if (top != null) {
1748                top.setState(state);
1749                top.copyBounds(compoundRect);
1750                top.setCallback(this);
1751                dr.mDrawableSizeTop = compoundRect.height();
1752                dr.mDrawableWidthTop = compoundRect.width();
1753            } else {
1754                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1755            }
1756
1757            if (bottom != null) {
1758                bottom.setState(state);
1759                bottom.copyBounds(compoundRect);
1760                bottom.setCallback(this);
1761                dr.mDrawableSizeBottom = compoundRect.height();
1762                dr.mDrawableWidthBottom = compoundRect.width();
1763            } else {
1764                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1765            }
1766        }
1767
1768        invalidate();
1769        requestLayout();
1770    }
1771
1772    /**
1773     * Sets the Drawables (if any) to appear to the left of, above,
1774     * to the right of, and below the text.  Use 0 if you do not
1775     * want a Drawable there. The Drawables' bounds will be set to
1776     * their intrinsic bounds.
1777     *
1778     * @param left Resource identifier of the left Drawable.
1779     * @param top Resource identifier of the top Drawable.
1780     * @param right Resource identifier of the right Drawable.
1781     * @param bottom Resource identifier of the bottom Drawable.
1782     *
1783     * @attr ref android.R.styleable#TextView_drawableLeft
1784     * @attr ref android.R.styleable#TextView_drawableTop
1785     * @attr ref android.R.styleable#TextView_drawableRight
1786     * @attr ref android.R.styleable#TextView_drawableBottom
1787     */
1788    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1789        final Resources resources = getContext().getResources();
1790        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1791                top != 0 ? resources.getDrawable(top) : null,
1792                right != 0 ? resources.getDrawable(right) : null,
1793                bottom != 0 ? resources.getDrawable(bottom) : null);
1794    }
1795
1796    /**
1797     * Sets the Drawables (if any) to appear to the left of, above,
1798     * to the right of, and below the text.  Use null if you do not
1799     * want a Drawable there. The Drawables' bounds will be set to
1800     * their intrinsic bounds.
1801     *
1802     * @attr ref android.R.styleable#TextView_drawableLeft
1803     * @attr ref android.R.styleable#TextView_drawableTop
1804     * @attr ref android.R.styleable#TextView_drawableRight
1805     * @attr ref android.R.styleable#TextView_drawableBottom
1806     */
1807    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1808            Drawable right, Drawable bottom) {
1809
1810        if (left != null) {
1811            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1812        }
1813        if (right != null) {
1814            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1815        }
1816        if (top != null) {
1817            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1818        }
1819        if (bottom != null) {
1820            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1821        }
1822        setCompoundDrawables(left, top, right, bottom);
1823    }
1824
1825    /**
1826     * Sets the Drawables (if any) to appear to the start of, above,
1827     * to the end of, and below the text.  Use null if you do not
1828     * want a Drawable there.  The Drawables must already have had
1829     * {@link Drawable#setBounds} called.
1830     *
1831     * @attr ref android.R.styleable#TextView_drawableStart
1832     * @attr ref android.R.styleable#TextView_drawableTop
1833     * @attr ref android.R.styleable#TextView_drawableEnd
1834     * @attr ref android.R.styleable#TextView_drawableBottom
1835     *
1836     * @hide
1837     */
1838    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1839                                     Drawable end, Drawable bottom) {
1840        Drawables dr = mDrawables;
1841
1842        final boolean drawables = start != null || top != null
1843                || end != null || bottom != null;
1844
1845        if (!drawables) {
1846            // Clearing drawables...  can we free the data structure?
1847            if (dr != null) {
1848                if (dr.mDrawablePadding == 0) {
1849                    mDrawables = null;
1850                } else {
1851                    // We need to retain the last set padding, so just clear
1852                    // out all of the fields in the existing structure.
1853                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1854                    dr.mDrawableStart = null;
1855                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1856                    dr.mDrawableTop = null;
1857                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1858                    dr.mDrawableEnd = null;
1859                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1860                    dr.mDrawableBottom = null;
1861                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1862                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1863                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1864                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1865                }
1866            }
1867        } else {
1868            if (dr == null) {
1869                mDrawables = dr = new Drawables();
1870            }
1871
1872            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1873                dr.mDrawableStart.setCallback(null);
1874            }
1875            dr.mDrawableStart = start;
1876
1877            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1878                dr.mDrawableTop.setCallback(null);
1879            }
1880            dr.mDrawableTop = top;
1881
1882            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1883                dr.mDrawableEnd.setCallback(null);
1884            }
1885            dr.mDrawableEnd = end;
1886
1887            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1888                dr.mDrawableBottom.setCallback(null);
1889            }
1890            dr.mDrawableBottom = bottom;
1891
1892            final Rect compoundRect = dr.mCompoundRect;
1893            int[] state;
1894
1895            state = getDrawableState();
1896
1897            if (start != null) {
1898                start.setState(state);
1899                start.copyBounds(compoundRect);
1900                start.setCallback(this);
1901                dr.mDrawableSizeStart = compoundRect.width();
1902                dr.mDrawableHeightStart = compoundRect.height();
1903            } else {
1904                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1905            }
1906
1907            if (end != null) {
1908                end.setState(state);
1909                end.copyBounds(compoundRect);
1910                end.setCallback(this);
1911                dr.mDrawableSizeEnd = compoundRect.width();
1912                dr.mDrawableHeightEnd = compoundRect.height();
1913            } else {
1914                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1915            }
1916
1917            if (top != null) {
1918                top.setState(state);
1919                top.copyBounds(compoundRect);
1920                top.setCallback(this);
1921                dr.mDrawableSizeTop = compoundRect.height();
1922                dr.mDrawableWidthTop = compoundRect.width();
1923            } else {
1924                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1925            }
1926
1927            if (bottom != null) {
1928                bottom.setState(state);
1929                bottom.copyBounds(compoundRect);
1930                bottom.setCallback(this);
1931                dr.mDrawableSizeBottom = compoundRect.height();
1932                dr.mDrawableWidthBottom = compoundRect.width();
1933            } else {
1934                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1935            }
1936        }
1937
1938        resolveDrawables();
1939        invalidate();
1940        requestLayout();
1941    }
1942
1943    /**
1944     * Sets the Drawables (if any) to appear to the start of, above,
1945     * to the end of, and below the text.  Use 0 if you do not
1946     * want a Drawable there. The Drawables' bounds will be set to
1947     * their intrinsic bounds.
1948     *
1949     * @param start Resource identifier of the start Drawable.
1950     * @param top Resource identifier of the top Drawable.
1951     * @param end Resource identifier of the end Drawable.
1952     * @param bottom Resource identifier of the bottom Drawable.
1953     *
1954     * @attr ref android.R.styleable#TextView_drawableStart
1955     * @attr ref android.R.styleable#TextView_drawableTop
1956     * @attr ref android.R.styleable#TextView_drawableEnd
1957     * @attr ref android.R.styleable#TextView_drawableBottom
1958     *
1959     * @hide
1960     */
1961    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1962            int bottom) {
1963        resetResolvedDrawables();
1964        final Resources resources = getContext().getResources();
1965        setCompoundDrawablesRelativeWithIntrinsicBounds(
1966                start != 0 ? resources.getDrawable(start) : null,
1967                top != 0 ? resources.getDrawable(top) : null,
1968                end != 0 ? resources.getDrawable(end) : null,
1969                bottom != 0 ? resources.getDrawable(bottom) : null);
1970    }
1971
1972    /**
1973     * Sets the Drawables (if any) to appear to the start of, above,
1974     * to the end of, and below the text.  Use null if you do not
1975     * want a Drawable there. The Drawables' bounds will be set to
1976     * their intrinsic bounds.
1977     *
1978     * @attr ref android.R.styleable#TextView_drawableStart
1979     * @attr ref android.R.styleable#TextView_drawableTop
1980     * @attr ref android.R.styleable#TextView_drawableEnd
1981     * @attr ref android.R.styleable#TextView_drawableBottom
1982     *
1983     * @hide
1984     */
1985    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1986            Drawable end, Drawable bottom) {
1987
1988        resetResolvedDrawables();
1989        if (start != null) {
1990            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1991        }
1992        if (end != null) {
1993            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1994        }
1995        if (top != null) {
1996            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1997        }
1998        if (bottom != null) {
1999            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2000        }
2001        setCompoundDrawablesRelative(start, top, end, bottom);
2002    }
2003
2004    /**
2005     * Returns drawables for the left, top, right, and bottom borders.
2006     */
2007    public Drawable[] getCompoundDrawables() {
2008        final Drawables dr = mDrawables;
2009        if (dr != null) {
2010            return new Drawable[] {
2011                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2012            };
2013        } else {
2014            return new Drawable[] { null, null, null, null };
2015        }
2016    }
2017
2018    /**
2019     * Returns drawables for the start, top, end, and bottom borders.
2020     *
2021     * @hide
2022     */
2023    public Drawable[] getCompoundDrawablesRelative() {
2024        final Drawables dr = mDrawables;
2025        if (dr != null) {
2026            return new Drawable[] {
2027                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2028            };
2029        } else {
2030            return new Drawable[] { null, null, null, null };
2031        }
2032    }
2033
2034    /**
2035     * Sets the size of the padding between the compound drawables and
2036     * the text.
2037     *
2038     * @attr ref android.R.styleable#TextView_drawablePadding
2039     */
2040    public void setCompoundDrawablePadding(int pad) {
2041        Drawables dr = mDrawables;
2042        if (pad == 0) {
2043            if (dr != null) {
2044                dr.mDrawablePadding = pad;
2045            }
2046        } else {
2047            if (dr == null) {
2048                mDrawables = dr = new Drawables();
2049            }
2050            dr.mDrawablePadding = pad;
2051        }
2052
2053        invalidate();
2054        requestLayout();
2055    }
2056
2057    /**
2058     * Returns the padding between the compound drawables and the text.
2059     */
2060    public int getCompoundDrawablePadding() {
2061        final Drawables dr = mDrawables;
2062        return dr != null ? dr.mDrawablePadding : 0;
2063    }
2064
2065    @Override
2066    public void setPadding(int left, int top, int right, int bottom) {
2067        if (left != mPaddingLeft ||
2068            right != mPaddingRight ||
2069            top != mPaddingTop ||
2070            bottom != mPaddingBottom) {
2071            nullLayouts();
2072        }
2073
2074        // the super call will requestLayout()
2075        super.setPadding(left, top, right, bottom);
2076        invalidate();
2077    }
2078
2079    /**
2080     * Gets the autolink mask of the text.  See {@link
2081     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2082     * possible values.
2083     *
2084     * @attr ref android.R.styleable#TextView_autoLink
2085     */
2086    public final int getAutoLinkMask() {
2087        return mAutoLinkMask;
2088    }
2089
2090    /**
2091     * Sets the text color, size, style, hint color, and highlight color
2092     * from the specified TextAppearance resource.
2093     */
2094    public void setTextAppearance(Context context, int resid) {
2095        TypedArray appearance =
2096            context.obtainStyledAttributes(resid,
2097                                           com.android.internal.R.styleable.TextAppearance);
2098
2099        int color;
2100        ColorStateList colors;
2101        int ts;
2102
2103        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2104        if (color != 0) {
2105            setHighlightColor(color);
2106        }
2107
2108        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2109                                              TextAppearance_textColor);
2110        if (colors != null) {
2111            setTextColor(colors);
2112        }
2113
2114        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2115                                              TextAppearance_textSize, 0);
2116        if (ts != 0) {
2117            setRawTextSize(ts);
2118        }
2119
2120        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2121                                              TextAppearance_textColorHint);
2122        if (colors != null) {
2123            setHintTextColor(colors);
2124        }
2125
2126        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2127                                              TextAppearance_textColorLink);
2128        if (colors != null) {
2129            setLinkTextColor(colors);
2130        }
2131
2132        int typefaceIndex, styleIndex;
2133
2134        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2135                                          TextAppearance_typeface, -1);
2136        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2137                                       TextAppearance_textStyle, -1);
2138
2139        setTypefaceByIndex(typefaceIndex, styleIndex);
2140
2141        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2142                false)) {
2143            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2144        }
2145
2146        appearance.recycle();
2147    }
2148
2149    /**
2150     * @return the size (in pixels) of the default text size in this TextView.
2151     */
2152    public float getTextSize() {
2153        return mTextPaint.getTextSize();
2154    }
2155
2156    /**
2157     * Set the default text size to the given value, interpreted as "scaled
2158     * pixel" units.  This size is adjusted based on the current density and
2159     * user font size preference.
2160     *
2161     * @param size The scaled pixel size.
2162     *
2163     * @attr ref android.R.styleable#TextView_textSize
2164     */
2165    @android.view.RemotableViewMethod
2166    public void setTextSize(float size) {
2167        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2168    }
2169
2170    /**
2171     * Set the default text size to a given unit and value.  See {@link
2172     * TypedValue} for the possible dimension units.
2173     *
2174     * @param unit The desired dimension unit.
2175     * @param size The desired size in the given units.
2176     *
2177     * @attr ref android.R.styleable#TextView_textSize
2178     */
2179    public void setTextSize(int unit, float size) {
2180        Context c = getContext();
2181        Resources r;
2182
2183        if (c == null)
2184            r = Resources.getSystem();
2185        else
2186            r = c.getResources();
2187
2188        setRawTextSize(TypedValue.applyDimension(
2189            unit, size, r.getDisplayMetrics()));
2190    }
2191
2192    private void setRawTextSize(float size) {
2193        if (size != mTextPaint.getTextSize()) {
2194            mTextPaint.setTextSize(size);
2195
2196            if (mLayout != null) {
2197                nullLayouts();
2198                requestLayout();
2199                invalidate();
2200            }
2201        }
2202    }
2203
2204    /**
2205     * @return the extent by which text is currently being stretched
2206     * horizontally.  This will usually be 1.
2207     */
2208    public float getTextScaleX() {
2209        return mTextPaint.getTextScaleX();
2210    }
2211
2212    /**
2213     * Sets the extent by which text should be stretched horizontally.
2214     *
2215     * @attr ref android.R.styleable#TextView_textScaleX
2216     */
2217    @android.view.RemotableViewMethod
2218    public void setTextScaleX(float size) {
2219        if (size != mTextPaint.getTextScaleX()) {
2220            mUserSetTextScaleX = true;
2221            mTextPaint.setTextScaleX(size);
2222
2223            if (mLayout != null) {
2224                nullLayouts();
2225                requestLayout();
2226                invalidate();
2227            }
2228        }
2229    }
2230
2231    /**
2232     * Sets the typeface and style in which the text should be displayed.
2233     * Note that not all Typeface families actually have bold and italic
2234     * variants, so you may need to use
2235     * {@link #setTypeface(Typeface, int)} to get the appearance
2236     * that you actually want.
2237     *
2238     * @attr ref android.R.styleable#TextView_typeface
2239     * @attr ref android.R.styleable#TextView_textStyle
2240     */
2241    public void setTypeface(Typeface tf) {
2242        if (mTextPaint.getTypeface() != tf) {
2243            mTextPaint.setTypeface(tf);
2244
2245            if (mLayout != null) {
2246                nullLayouts();
2247                requestLayout();
2248                invalidate();
2249            }
2250        }
2251    }
2252
2253    /**
2254     * @return the current typeface and style in which the text is being
2255     * displayed.
2256     */
2257    public Typeface getTypeface() {
2258        return mTextPaint.getTypeface();
2259    }
2260
2261    /**
2262     * Sets the text color for all the states (normal, selected,
2263     * focused) to be this color.
2264     *
2265     * @attr ref android.R.styleable#TextView_textColor
2266     */
2267    @android.view.RemotableViewMethod
2268    public void setTextColor(int color) {
2269        mTextColor = ColorStateList.valueOf(color);
2270        updateTextColors();
2271    }
2272
2273    /**
2274     * Sets the text color.
2275     *
2276     * @attr ref android.R.styleable#TextView_textColor
2277     */
2278    public void setTextColor(ColorStateList colors) {
2279        if (colors == null) {
2280            throw new NullPointerException();
2281        }
2282
2283        mTextColor = colors;
2284        updateTextColors();
2285    }
2286
2287    /**
2288     * Return the set of text colors.
2289     *
2290     * @return Returns the set of text colors.
2291     */
2292    public final ColorStateList getTextColors() {
2293        return mTextColor;
2294    }
2295
2296    /**
2297     * <p>Return the current color selected for normal text.</p>
2298     *
2299     * @return Returns the current text color.
2300     */
2301    public final int getCurrentTextColor() {
2302        return mCurTextColor;
2303    }
2304
2305    /**
2306     * Sets the color used to display the selection highlight.
2307     *
2308     * @attr ref android.R.styleable#TextView_textColorHighlight
2309     */
2310    @android.view.RemotableViewMethod
2311    public void setHighlightColor(int color) {
2312        if (mHighlightColor != color) {
2313            mHighlightColor = color;
2314            mTextDisplayListIsValid = false;
2315            invalidate();
2316        }
2317    }
2318
2319    /**
2320     * Gives the text a shadow of the specified radius and color, the specified
2321     * distance from its normal position.
2322     *
2323     * @attr ref android.R.styleable#TextView_shadowColor
2324     * @attr ref android.R.styleable#TextView_shadowDx
2325     * @attr ref android.R.styleable#TextView_shadowDy
2326     * @attr ref android.R.styleable#TextView_shadowRadius
2327     */
2328    public void setShadowLayer(float radius, float dx, float dy, int color) {
2329        mTextPaint.setShadowLayer(radius, dx, dy, color);
2330
2331        mShadowRadius = radius;
2332        mShadowDx = dx;
2333        mShadowDy = dy;
2334
2335        mTextDisplayListIsValid = false;
2336        invalidate();
2337    }
2338
2339    /**
2340     * @return the base paint used for the text.  Please use this only to
2341     * consult the Paint's properties and not to change them.
2342     */
2343    public TextPaint getPaint() {
2344        return mTextPaint;
2345    }
2346
2347    /**
2348     * Sets the autolink mask of the text.  See {@link
2349     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2350     * possible values.
2351     *
2352     * @attr ref android.R.styleable#TextView_autoLink
2353     */
2354    @android.view.RemotableViewMethod
2355    public final void setAutoLinkMask(int mask) {
2356        mAutoLinkMask = mask;
2357    }
2358
2359    /**
2360     * Sets whether the movement method will automatically be set to
2361     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2362     * set to nonzero and links are detected in {@link #setText}.
2363     * The default is true.
2364     *
2365     * @attr ref android.R.styleable#TextView_linksClickable
2366     */
2367    @android.view.RemotableViewMethod
2368    public final void setLinksClickable(boolean whether) {
2369        mLinksClickable = whether;
2370    }
2371
2372    /**
2373     * Returns whether the movement method will automatically be set to
2374     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2375     * set to nonzero and links are detected in {@link #setText}.
2376     * The default is true.
2377     *
2378     * @attr ref android.R.styleable#TextView_linksClickable
2379     */
2380    public final boolean getLinksClickable() {
2381        return mLinksClickable;
2382    }
2383
2384    /**
2385     * Returns the list of URLSpans attached to the text
2386     * (by {@link Linkify} or otherwise) if any.  You can call
2387     * {@link URLSpan#getURL} on them to find where they link to
2388     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2389     * to find the region of the text they are attached to.
2390     */
2391    public URLSpan[] getUrls() {
2392        if (mText instanceof Spanned) {
2393            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2394        } else {
2395            return new URLSpan[0];
2396        }
2397    }
2398
2399    /**
2400     * Sets the color of the hint text.
2401     *
2402     * @attr ref android.R.styleable#TextView_textColorHint
2403     */
2404    @android.view.RemotableViewMethod
2405    public final void setHintTextColor(int color) {
2406        mHintTextColor = ColorStateList.valueOf(color);
2407        updateTextColors();
2408    }
2409
2410    /**
2411     * Sets the color of the hint text.
2412     *
2413     * @attr ref android.R.styleable#TextView_textColorHint
2414     */
2415    public final void setHintTextColor(ColorStateList colors) {
2416        mHintTextColor = colors;
2417        updateTextColors();
2418    }
2419
2420    /**
2421     * <p>Return the color used to paint the hint text.</p>
2422     *
2423     * @return Returns the list of hint text colors.
2424     */
2425    public final ColorStateList getHintTextColors() {
2426        return mHintTextColor;
2427    }
2428
2429    /**
2430     * <p>Return the current color selected to paint the hint text.</p>
2431     *
2432     * @return Returns the current hint text color.
2433     */
2434    public final int getCurrentHintTextColor() {
2435        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2436    }
2437
2438    /**
2439     * Sets the color of links in the text.
2440     *
2441     * @attr ref android.R.styleable#TextView_textColorLink
2442     */
2443    @android.view.RemotableViewMethod
2444    public final void setLinkTextColor(int color) {
2445        mLinkTextColor = ColorStateList.valueOf(color);
2446        updateTextColors();
2447    }
2448
2449    /**
2450     * Sets the color of links in the text.
2451     *
2452     * @attr ref android.R.styleable#TextView_textColorLink
2453     */
2454    public final void setLinkTextColor(ColorStateList colors) {
2455        mLinkTextColor = colors;
2456        updateTextColors();
2457    }
2458
2459    /**
2460     * <p>Returns the color used to paint links in the text.</p>
2461     *
2462     * @return Returns the list of link text colors.
2463     */
2464    public final ColorStateList getLinkTextColors() {
2465        return mLinkTextColor;
2466    }
2467
2468    /**
2469     * Sets the horizontal alignment of the text and the
2470     * vertical gravity that will be used when there is extra space
2471     * in the TextView beyond what is required for the text itself.
2472     *
2473     * @see android.view.Gravity
2474     * @attr ref android.R.styleable#TextView_gravity
2475     */
2476    public void setGravity(int gravity) {
2477        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2478            gravity |= Gravity.START;
2479        }
2480        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2481            gravity |= Gravity.TOP;
2482        }
2483
2484        boolean newLayout = false;
2485
2486        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2487            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2488            newLayout = true;
2489        }
2490
2491        if (gravity != mGravity) {
2492            invalidate();
2493            mLayoutAlignment = null;
2494        }
2495
2496        mGravity = gravity;
2497
2498        if (mLayout != null && newLayout) {
2499            // XXX this is heavy-handed because no actual content changes.
2500            int want = mLayout.getWidth();
2501            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2502
2503            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2504                          mRight - mLeft - getCompoundPaddingLeft() -
2505                          getCompoundPaddingRight(), true);
2506        }
2507    }
2508
2509    /**
2510     * Returns the horizontal and vertical alignment of this TextView.
2511     *
2512     * @see android.view.Gravity
2513     * @attr ref android.R.styleable#TextView_gravity
2514     */
2515    public int getGravity() {
2516        return mGravity;
2517    }
2518
2519    /**
2520     * @return the flags on the Paint being used to display the text.
2521     * @see Paint#getFlags
2522     */
2523    public int getPaintFlags() {
2524        return mTextPaint.getFlags();
2525    }
2526
2527    /**
2528     * Sets flags on the Paint being used to display the text and
2529     * reflows the text if they are different from the old flags.
2530     * @see Paint#setFlags
2531     */
2532    @android.view.RemotableViewMethod
2533    public void setPaintFlags(int flags) {
2534        if (mTextPaint.getFlags() != flags) {
2535            mTextPaint.setFlags(flags);
2536
2537            if (mLayout != null) {
2538                nullLayouts();
2539                requestLayout();
2540                invalidate();
2541            }
2542        }
2543    }
2544
2545    /**
2546     * Sets whether the text should be allowed to be wider than the
2547     * View is.  If false, it will be wrapped to the width of the View.
2548     *
2549     * @attr ref android.R.styleable#TextView_scrollHorizontally
2550     */
2551    public void setHorizontallyScrolling(boolean whether) {
2552        if (mHorizontallyScrolling != whether) {
2553            mHorizontallyScrolling = whether;
2554
2555            if (mLayout != null) {
2556                nullLayouts();
2557                requestLayout();
2558                invalidate();
2559            }
2560        }
2561    }
2562
2563    /**
2564     * Returns whether the text is allowed to be wider than the View is.
2565     * If false, the text will be wrapped to the width of the View.
2566     *
2567     * @attr ref android.R.styleable#TextView_scrollHorizontally
2568     * @hide
2569     */
2570    public boolean getHorizontallyScrolling() {
2571        return mHorizontallyScrolling;
2572    }
2573
2574    /**
2575     * Makes the TextView at least this many lines tall.
2576     *
2577     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2578     * set this value to 1.
2579     *
2580     * @attr ref android.R.styleable#TextView_minLines
2581     */
2582    @android.view.RemotableViewMethod
2583    public void setMinLines(int minlines) {
2584        mMinimum = minlines;
2585        mMinMode = LINES;
2586
2587        requestLayout();
2588        invalidate();
2589    }
2590
2591    /**
2592     * Makes the TextView at least this many pixels tall.
2593     *
2594     * Setting this value overrides any other (minimum) number of lines setting.
2595     *
2596     * @attr ref android.R.styleable#TextView_minHeight
2597     */
2598    @android.view.RemotableViewMethod
2599    public void setMinHeight(int minHeight) {
2600        mMinimum = minHeight;
2601        mMinMode = PIXELS;
2602
2603        requestLayout();
2604        invalidate();
2605    }
2606
2607    /**
2608     * Makes the TextView at most this many lines tall.
2609     *
2610     * Setting this value overrides any other (maximum) height setting.
2611     *
2612     * @attr ref android.R.styleable#TextView_maxLines
2613     */
2614    @android.view.RemotableViewMethod
2615    public void setMaxLines(int maxlines) {
2616        mMaximum = maxlines;
2617        mMaxMode = LINES;
2618
2619        requestLayout();
2620        invalidate();
2621    }
2622
2623    /**
2624     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2625     * {@link #setMaxLines(int)} method.
2626     *
2627     * Setting this value overrides any other (maximum) number of lines setting.
2628     *
2629     * @attr ref android.R.styleable#TextView_maxHeight
2630     */
2631    @android.view.RemotableViewMethod
2632    public void setMaxHeight(int maxHeight) {
2633        mMaximum = maxHeight;
2634        mMaxMode = PIXELS;
2635
2636        requestLayout();
2637        invalidate();
2638    }
2639
2640    /**
2641     * Makes the TextView exactly this many lines tall.
2642     *
2643     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2644     * height setting. A single line TextView will set this value to 1.
2645     *
2646     * @attr ref android.R.styleable#TextView_lines
2647     */
2648    @android.view.RemotableViewMethod
2649    public void setLines(int lines) {
2650        mMaximum = mMinimum = lines;
2651        mMaxMode = mMinMode = LINES;
2652
2653        requestLayout();
2654        invalidate();
2655    }
2656
2657    /**
2658     * Makes the TextView exactly this many pixels tall.
2659     * You could do the same thing by specifying this number in the
2660     * LayoutParams.
2661     *
2662     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2663     * height setting.
2664     *
2665     * @attr ref android.R.styleable#TextView_height
2666     */
2667    @android.view.RemotableViewMethod
2668    public void setHeight(int pixels) {
2669        mMaximum = mMinimum = pixels;
2670        mMaxMode = mMinMode = PIXELS;
2671
2672        requestLayout();
2673        invalidate();
2674    }
2675
2676    /**
2677     * Makes the TextView at least this many ems wide
2678     *
2679     * @attr ref android.R.styleable#TextView_minEms
2680     */
2681    @android.view.RemotableViewMethod
2682    public void setMinEms(int minems) {
2683        mMinWidth = minems;
2684        mMinWidthMode = EMS;
2685
2686        requestLayout();
2687        invalidate();
2688    }
2689
2690    /**
2691     * Makes the TextView at least this many pixels wide
2692     *
2693     * @attr ref android.R.styleable#TextView_minWidth
2694     */
2695    @android.view.RemotableViewMethod
2696    public void setMinWidth(int minpixels) {
2697        mMinWidth = minpixels;
2698        mMinWidthMode = PIXELS;
2699
2700        requestLayout();
2701        invalidate();
2702    }
2703
2704    /**
2705     * Makes the TextView at most this many ems wide
2706     *
2707     * @attr ref android.R.styleable#TextView_maxEms
2708     */
2709    @android.view.RemotableViewMethod
2710    public void setMaxEms(int maxems) {
2711        mMaxWidth = maxems;
2712        mMaxWidthMode = EMS;
2713
2714        requestLayout();
2715        invalidate();
2716    }
2717
2718    /**
2719     * Makes the TextView at most this many pixels wide
2720     *
2721     * @attr ref android.R.styleable#TextView_maxWidth
2722     */
2723    @android.view.RemotableViewMethod
2724    public void setMaxWidth(int maxpixels) {
2725        mMaxWidth = maxpixels;
2726        mMaxWidthMode = PIXELS;
2727
2728        requestLayout();
2729        invalidate();
2730    }
2731
2732    /**
2733     * Makes the TextView exactly this many ems wide
2734     *
2735     * @attr ref android.R.styleable#TextView_ems
2736     */
2737    @android.view.RemotableViewMethod
2738    public void setEms(int ems) {
2739        mMaxWidth = mMinWidth = ems;
2740        mMaxWidthMode = mMinWidthMode = EMS;
2741
2742        requestLayout();
2743        invalidate();
2744    }
2745
2746    /**
2747     * Makes the TextView exactly this many pixels wide.
2748     * You could do the same thing by specifying this number in the
2749     * LayoutParams.
2750     *
2751     * @attr ref android.R.styleable#TextView_width
2752     */
2753    @android.view.RemotableViewMethod
2754    public void setWidth(int pixels) {
2755        mMaxWidth = mMinWidth = pixels;
2756        mMaxWidthMode = mMinWidthMode = PIXELS;
2757
2758        requestLayout();
2759        invalidate();
2760    }
2761
2762
2763    /**
2764     * Sets line spacing for this TextView.  Each line will have its height
2765     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2766     *
2767     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2768     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2769     */
2770    public void setLineSpacing(float add, float mult) {
2771        if (mSpacingAdd != add || mSpacingMult != mult) {
2772            mSpacingAdd = add;
2773            mSpacingMult = mult;
2774
2775            if (mLayout != null) {
2776                nullLayouts();
2777                requestLayout();
2778                invalidate();
2779            }
2780        }
2781    }
2782
2783    /**
2784     * Convenience method: Append the specified text to the TextView's
2785     * display buffer, upgrading it to BufferType.EDITABLE if it was
2786     * not already editable.
2787     */
2788    public final void append(CharSequence text) {
2789        append(text, 0, text.length());
2790    }
2791
2792    /**
2793     * Convenience method: Append the specified text slice to the TextView's
2794     * display buffer, upgrading it to BufferType.EDITABLE if it was
2795     * not already editable.
2796     */
2797    public void append(CharSequence text, int start, int end) {
2798        if (!(mText instanceof Editable)) {
2799            setText(mText, BufferType.EDITABLE);
2800        }
2801
2802        ((Editable) mText).append(text, start, end);
2803    }
2804
2805    private void updateTextColors() {
2806        boolean inval = false;
2807        int color = mTextColor.getColorForState(getDrawableState(), 0);
2808        if (color != mCurTextColor) {
2809            mCurTextColor = color;
2810            inval = true;
2811        }
2812        if (mLinkTextColor != null) {
2813            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2814            if (color != mTextPaint.linkColor) {
2815                mTextPaint.linkColor = color;
2816                inval = true;
2817            }
2818        }
2819        if (mHintTextColor != null) {
2820            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2821            if (color != mCurHintTextColor && mText.length() == 0) {
2822                mCurHintTextColor = color;
2823                inval = true;
2824            }
2825        }
2826        if (inval) {
2827            mTextDisplayListIsValid = false;
2828            invalidate();
2829        }
2830    }
2831
2832    @Override
2833    protected void drawableStateChanged() {
2834        super.drawableStateChanged();
2835        if (mTextColor != null && mTextColor.isStateful()
2836                || (mHintTextColor != null && mHintTextColor.isStateful())
2837                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2838            updateTextColors();
2839        }
2840
2841        final Drawables dr = mDrawables;
2842        if (dr != null) {
2843            int[] state = getDrawableState();
2844            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2845                dr.mDrawableTop.setState(state);
2846            }
2847            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2848                dr.mDrawableBottom.setState(state);
2849            }
2850            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2851                dr.mDrawableLeft.setState(state);
2852            }
2853            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2854                dr.mDrawableRight.setState(state);
2855            }
2856            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2857                dr.mDrawableStart.setState(state);
2858            }
2859            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2860                dr.mDrawableEnd.setState(state);
2861            }
2862        }
2863    }
2864
2865    /**
2866     * User interface state that is stored by TextView for implementing
2867     * {@link View#onSaveInstanceState}.
2868     */
2869    public static class SavedState extends BaseSavedState {
2870        int selStart;
2871        int selEnd;
2872        CharSequence text;
2873        boolean frozenWithFocus;
2874        CharSequence error;
2875
2876        SavedState(Parcelable superState) {
2877            super(superState);
2878        }
2879
2880        @Override
2881        public void writeToParcel(Parcel out, int flags) {
2882            super.writeToParcel(out, flags);
2883            out.writeInt(selStart);
2884            out.writeInt(selEnd);
2885            out.writeInt(frozenWithFocus ? 1 : 0);
2886            TextUtils.writeToParcel(text, out, flags);
2887
2888            if (error == null) {
2889                out.writeInt(0);
2890            } else {
2891                out.writeInt(1);
2892                TextUtils.writeToParcel(error, out, flags);
2893            }
2894        }
2895
2896        @Override
2897        public String toString() {
2898            String str = "TextView.SavedState{"
2899                    + Integer.toHexString(System.identityHashCode(this))
2900                    + " start=" + selStart + " end=" + selEnd;
2901            if (text != null) {
2902                str += " text=" + text;
2903            }
2904            return str + "}";
2905        }
2906
2907        @SuppressWarnings("hiding")
2908        public static final Parcelable.Creator<SavedState> CREATOR
2909                = new Parcelable.Creator<SavedState>() {
2910            public SavedState createFromParcel(Parcel in) {
2911                return new SavedState(in);
2912            }
2913
2914            public SavedState[] newArray(int size) {
2915                return new SavedState[size];
2916            }
2917        };
2918
2919        private SavedState(Parcel in) {
2920            super(in);
2921            selStart = in.readInt();
2922            selEnd = in.readInt();
2923            frozenWithFocus = (in.readInt() != 0);
2924            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2925
2926            if (in.readInt() != 0) {
2927                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2928            }
2929        }
2930    }
2931
2932    @Override
2933    public Parcelable onSaveInstanceState() {
2934        Parcelable superState = super.onSaveInstanceState();
2935
2936        // Save state if we are forced to
2937        boolean save = mFreezesText;
2938        int start = 0;
2939        int end = 0;
2940
2941        if (mText != null) {
2942            start = getSelectionStart();
2943            end = getSelectionEnd();
2944            if (start >= 0 || end >= 0) {
2945                // Or save state if there is a selection
2946                save = true;
2947            }
2948        }
2949
2950        if (save) {
2951            SavedState ss = new SavedState(superState);
2952            // XXX Should also save the current scroll position!
2953            ss.selStart = start;
2954            ss.selEnd = end;
2955
2956            if (mText instanceof Spanned) {
2957                /*
2958                 * Calling setText() strips off any ChangeWatchers;
2959                 * strip them now to avoid leaking references.
2960                 * But do it to a copy so that if there are any
2961                 * further changes to the text of this view, it
2962                 * won't get into an inconsistent state.
2963                 */
2964
2965                Spannable sp = new SpannableString(mText);
2966
2967                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2968                    sp.removeSpan(cw);
2969                }
2970
2971                removeMisspelledSpans(sp);
2972                sp.removeSpan(mSuggestionRangeSpan);
2973
2974                ss.text = sp;
2975            } else {
2976                ss.text = mText.toString();
2977            }
2978
2979            if (isFocused() && start >= 0 && end >= 0) {
2980                ss.frozenWithFocus = true;
2981            }
2982
2983            ss.error = mError;
2984
2985            return ss;
2986        }
2987
2988        return superState;
2989    }
2990
2991    void removeMisspelledSpans(Spannable spannable) {
2992        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
2993                SuggestionSpan.class);
2994        for (int i = 0; i < suggestionSpans.length; i++) {
2995            int flags = suggestionSpans[i].getFlags();
2996            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
2997                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
2998                spannable.removeSpan(suggestionSpans[i]);
2999            }
3000        }
3001    }
3002
3003    @Override
3004    public void onRestoreInstanceState(Parcelable state) {
3005        if (!(state instanceof SavedState)) {
3006            super.onRestoreInstanceState(state);
3007            return;
3008        }
3009
3010        SavedState ss = (SavedState)state;
3011        super.onRestoreInstanceState(ss.getSuperState());
3012
3013        // XXX restore buffer type too, as well as lots of other stuff
3014        if (ss.text != null) {
3015            setText(ss.text);
3016        }
3017
3018        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3019            if (mText instanceof Spannable) {
3020                int len = mText.length();
3021
3022                if (ss.selStart > len || ss.selEnd > len) {
3023                    String restored = "";
3024
3025                    if (ss.text != null) {
3026                        restored = "(restored) ";
3027                    }
3028
3029                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3030                          "/" + ss.selEnd + " out of range for " + restored +
3031                          "text " + mText);
3032                } else {
3033                    Selection.setSelection((Spannable) mText, ss.selStart,
3034                                           ss.selEnd);
3035
3036                    if (ss.frozenWithFocus) {
3037                        mFrozenWithFocus = true;
3038                    }
3039                }
3040            }
3041        }
3042
3043        if (ss.error != null) {
3044            final CharSequence error = ss.error;
3045            // Display the error later, after the first layout pass
3046            post(new Runnable() {
3047                public void run() {
3048                    setError(error);
3049                }
3050            });
3051        }
3052    }
3053
3054    /**
3055     * Control whether this text view saves its entire text contents when
3056     * freezing to an icicle, in addition to dynamic state such as cursor
3057     * position.  By default this is false, not saving the text.  Set to true
3058     * if the text in the text view is not being saved somewhere else in
3059     * persistent storage (such as in a content provider) so that if the
3060     * view is later thawed the user will not lose their data.
3061     *
3062     * @param freezesText Controls whether a frozen icicle should include the
3063     * entire text data: true to include it, false to not.
3064     *
3065     * @attr ref android.R.styleable#TextView_freezesText
3066     */
3067    @android.view.RemotableViewMethod
3068    public void setFreezesText(boolean freezesText) {
3069        mFreezesText = freezesText;
3070    }
3071
3072    /**
3073     * Return whether this text view is including its entire text contents
3074     * in frozen icicles.
3075     *
3076     * @return Returns true if text is included, false if it isn't.
3077     *
3078     * @see #setFreezesText
3079     */
3080    public boolean getFreezesText() {
3081        return mFreezesText;
3082    }
3083
3084    ///////////////////////////////////////////////////////////////////////////
3085
3086    /**
3087     * Sets the Factory used to create new Editables.
3088     */
3089    public final void setEditableFactory(Editable.Factory factory) {
3090        mEditableFactory = factory;
3091        setText(mText);
3092    }
3093
3094    /**
3095     * Sets the Factory used to create new Spannables.
3096     */
3097    public final void setSpannableFactory(Spannable.Factory factory) {
3098        mSpannableFactory = factory;
3099        setText(mText);
3100    }
3101
3102    /**
3103     * Sets the string value of the TextView. TextView <em>does not</em> accept
3104     * HTML-like formatting, which you can do with text strings in XML resource files.
3105     * To style your strings, attach android.text.style.* objects to a
3106     * {@link android.text.SpannableString SpannableString}, or see the
3107     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3108     * Available Resource Types</a> documentation for an example of setting
3109     * formatted text in the XML resource file.
3110     *
3111     * @attr ref android.R.styleable#TextView_text
3112     */
3113    @android.view.RemotableViewMethod
3114    public final void setText(CharSequence text) {
3115        setText(text, mBufferType);
3116    }
3117
3118    /**
3119     * Like {@link #setText(CharSequence)},
3120     * except that the cursor position (if any) is retained in the new text.
3121     *
3122     * @param text The new text to place in the text view.
3123     *
3124     * @see #setText(CharSequence)
3125     */
3126    @android.view.RemotableViewMethod
3127    public final void setTextKeepState(CharSequence text) {
3128        setTextKeepState(text, mBufferType);
3129    }
3130
3131    /**
3132     * Sets the text that this TextView is to display (see
3133     * {@link #setText(CharSequence)}) and also sets whether it is stored
3134     * in a styleable/spannable buffer and whether it is editable.
3135     *
3136     * @attr ref android.R.styleable#TextView_text
3137     * @attr ref android.R.styleable#TextView_bufferType
3138     */
3139    public void setText(CharSequence text, BufferType type) {
3140        setText(text, type, true, 0);
3141
3142        if (mCharWrapper != null) {
3143            mCharWrapper.mChars = null;
3144        }
3145    }
3146
3147    private void setText(CharSequence text, BufferType type,
3148                         boolean notifyBefore, int oldlen) {
3149        if (text == null) {
3150            text = "";
3151        }
3152
3153        // If suggestions are not enabled, remove the suggestion spans from the text
3154        if (!isSuggestionsEnabled()) {
3155            text = removeSuggestionSpans(text);
3156        }
3157
3158        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3159
3160        if (text instanceof Spanned &&
3161            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3162            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3163                setHorizontalFadingEdgeEnabled(true);
3164                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3165            } else {
3166                setHorizontalFadingEdgeEnabled(false);
3167                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3168            }
3169            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3170        }
3171
3172        int n = mFilters.length;
3173        for (int i = 0; i < n; i++) {
3174            CharSequence out = mFilters[i].filter(text, 0, text.length(), EMPTY_SPANNED, 0, 0);
3175            if (out != null) {
3176                text = out;
3177            }
3178        }
3179
3180        if (notifyBefore) {
3181            if (mText != null) {
3182                oldlen = mText.length();
3183                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3184            } else {
3185                sendBeforeTextChanged("", 0, 0, text.length());
3186            }
3187        }
3188
3189        boolean needEditableForNotification = false;
3190
3191        if (mListeners != null && mListeners.size() != 0) {
3192            needEditableForNotification = true;
3193        }
3194
3195        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3196            Editable t = mEditableFactory.newEditable(text);
3197            text = t;
3198            setFilters(t, mFilters);
3199            InputMethodManager imm = InputMethodManager.peekInstance();
3200            if (imm != null) imm.restartInput(this);
3201        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3202            text = mSpannableFactory.newSpannable(text);
3203        } else if (!(text instanceof CharWrapper)) {
3204            text = TextUtils.stringOrSpannedString(text);
3205        }
3206
3207        if (mAutoLinkMask != 0) {
3208            Spannable s2;
3209
3210            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3211                s2 = (Spannable) text;
3212            } else {
3213                s2 = mSpannableFactory.newSpannable(text);
3214            }
3215
3216            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3217                text = s2;
3218                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3219
3220                /*
3221                 * We must go ahead and set the text before changing the
3222                 * movement method, because setMovementMethod() may call
3223                 * setText() again to try to upgrade the buffer type.
3224                 */
3225                mText = text;
3226
3227                // Do not change the movement method for text that support text selection as it
3228                // would prevent an arbitrary cursor displacement.
3229                if (mLinksClickable && !textCanBeSelected()) {
3230                    setMovementMethod(LinkMovementMethod.getInstance());
3231                }
3232            }
3233        }
3234
3235        mBufferType = type;
3236        mText = text;
3237
3238        if (mTransformation == null) {
3239            mTransformed = text;
3240        } else {
3241            mTransformed = mTransformation.getTransformation(text, this);
3242        }
3243
3244        final int textLength = text.length();
3245
3246        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3247            Spannable sp = (Spannable) text;
3248
3249            // Remove any ChangeWatchers that might have come
3250            // from other TextViews.
3251            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3252            final int count = watchers.length;
3253            for (int i = 0; i < count; i++)
3254                sp.removeSpan(watchers[i]);
3255
3256            if (mChangeWatcher == null)
3257                mChangeWatcher = new ChangeWatcher();
3258
3259            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3260                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3261
3262            if (mInput != null) {
3263                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3264            }
3265
3266            if (mTransformation != null) {
3267                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3268            }
3269
3270            if (mMovement != null) {
3271                mMovement.initialize(this, (Spannable) text);
3272
3273                /*
3274                 * Initializing the movement method will have set the
3275                 * selection, so reset mSelectionMoved to keep that from
3276                 * interfering with the normal on-focus selection-setting.
3277                 */
3278                mSelectionMoved = false;
3279            }
3280        }
3281
3282        if (mLayout != null) {
3283            checkForRelayout();
3284        }
3285
3286        sendOnTextChanged(text, 0, oldlen, textLength);
3287        onTextChanged(text, 0, oldlen, textLength);
3288
3289        if (needEditableForNotification) {
3290            sendAfterTextChanged((Editable) text);
3291        }
3292
3293        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3294        prepareCursorControllers();
3295    }
3296
3297    /**
3298     * Sets the TextView to display the specified slice of the specified
3299     * char array.  You must promise that you will not change the contents
3300     * of the array except for right before another call to setText(),
3301     * since the TextView has no way to know that the text
3302     * has changed and that it needs to invalidate and re-layout.
3303     */
3304    public final void setText(char[] text, int start, int len) {
3305        int oldlen = 0;
3306
3307        if (start < 0 || len < 0 || start + len > text.length) {
3308            throw new IndexOutOfBoundsException(start + ", " + len);
3309        }
3310
3311        /*
3312         * We must do the before-notification here ourselves because if
3313         * the old text is a CharWrapper we destroy it before calling
3314         * into the normal path.
3315         */
3316        if (mText != null) {
3317            oldlen = mText.length();
3318            sendBeforeTextChanged(mText, 0, oldlen, len);
3319        } else {
3320            sendBeforeTextChanged("", 0, 0, len);
3321        }
3322
3323        if (mCharWrapper == null) {
3324            mCharWrapper = new CharWrapper(text, start, len);
3325        } else {
3326            mCharWrapper.set(text, start, len);
3327        }
3328
3329        setText(mCharWrapper, mBufferType, false, oldlen);
3330    }
3331
3332    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3333        private char[] mChars;
3334        private int mStart, mLength;
3335
3336        public CharWrapper(char[] chars, int start, int len) {
3337            mChars = chars;
3338            mStart = start;
3339            mLength = len;
3340        }
3341
3342        /* package */ void set(char[] chars, int start, int len) {
3343            mChars = chars;
3344            mStart = start;
3345            mLength = len;
3346        }
3347
3348        public int length() {
3349            return mLength;
3350        }
3351
3352        public char charAt(int off) {
3353            return mChars[off + mStart];
3354        }
3355
3356        @Override
3357        public String toString() {
3358            return new String(mChars, mStart, mLength);
3359        }
3360
3361        public CharSequence subSequence(int start, int end) {
3362            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3363                throw new IndexOutOfBoundsException(start + ", " + end);
3364            }
3365
3366            return new String(mChars, start + mStart, end - start);
3367        }
3368
3369        public void getChars(int start, int end, char[] buf, int off) {
3370            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3371                throw new IndexOutOfBoundsException(start + ", " + end);
3372            }
3373
3374            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3375        }
3376
3377        public void drawText(Canvas c, int start, int end,
3378                             float x, float y, Paint p) {
3379            c.drawText(mChars, start + mStart, end - start, x, y, p);
3380        }
3381
3382        public void drawTextRun(Canvas c, int start, int end,
3383                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3384            int count = end - start;
3385            int contextCount = contextEnd - contextStart;
3386            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3387                    contextCount, x, y, flags, p);
3388        }
3389
3390        public float measureText(int start, int end, Paint p) {
3391            return p.measureText(mChars, start + mStart, end - start);
3392        }
3393
3394        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3395            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3396        }
3397
3398        public float getTextRunAdvances(int start, int end, int contextStart,
3399                int contextEnd, int flags, float[] advances, int advancesIndex,
3400                Paint p) {
3401            int count = end - start;
3402            int contextCount = contextEnd - contextStart;
3403            return p.getTextRunAdvances(mChars, start + mStart, count,
3404                    contextStart + mStart, contextCount, flags, advances,
3405                    advancesIndex);
3406        }
3407
3408        public float getTextRunAdvances(int start, int end, int contextStart,
3409                int contextEnd, int flags, float[] advances, int advancesIndex,
3410                Paint p, int reserved) {
3411            int count = end - start;
3412            int contextCount = contextEnd - contextStart;
3413            return p.getTextRunAdvances(mChars, start + mStart, count,
3414                    contextStart + mStart, contextCount, flags, advances,
3415                    advancesIndex, reserved);
3416        }
3417
3418        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3419                int offset, int cursorOpt, Paint p) {
3420            int contextCount = contextEnd - contextStart;
3421            return p.getTextRunCursor(mChars, contextStart + mStart,
3422                    contextCount, flags, offset + mStart, cursorOpt);
3423        }
3424    }
3425
3426    /**
3427     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3428     * except that the cursor position (if any) is retained in the new text.
3429     *
3430     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3431     */
3432    public final void setTextKeepState(CharSequence text, BufferType type) {
3433        int start = getSelectionStart();
3434        int end = getSelectionEnd();
3435        int len = text.length();
3436
3437        setText(text, type);
3438
3439        if (start >= 0 || end >= 0) {
3440            if (mText instanceof Spannable) {
3441                Selection.setSelection((Spannable) mText,
3442                                       Math.max(0, Math.min(start, len)),
3443                                       Math.max(0, Math.min(end, len)));
3444            }
3445        }
3446    }
3447
3448    @android.view.RemotableViewMethod
3449    public final void setText(int resid) {
3450        setText(getContext().getResources().getText(resid));
3451    }
3452
3453    public final void setText(int resid, BufferType type) {
3454        setText(getContext().getResources().getText(resid), type);
3455    }
3456
3457    /**
3458     * Sets the text to be displayed when the text of the TextView is empty.
3459     * Null means to use the normal empty text. The hint does not currently
3460     * participate in determining the size of the view.
3461     *
3462     * @attr ref android.R.styleable#TextView_hint
3463     */
3464    @android.view.RemotableViewMethod
3465    public final void setHint(CharSequence hint) {
3466        mHint = TextUtils.stringOrSpannedString(hint);
3467
3468        if (mLayout != null) {
3469            checkForRelayout();
3470        }
3471
3472        if (mText.length() == 0) {
3473            invalidate();
3474        }
3475
3476        // Invalidate display list if hint will be used
3477        if (mText.length() == 0 && mHint != null) mTextDisplayListIsValid = false;
3478    }
3479
3480    /**
3481     * Sets the text to be displayed when the text of the TextView is empty,
3482     * from a resource.
3483     *
3484     * @attr ref android.R.styleable#TextView_hint
3485     */
3486    @android.view.RemotableViewMethod
3487    public final void setHint(int resid) {
3488        setHint(getContext().getResources().getText(resid));
3489    }
3490
3491    /**
3492     * Returns the hint that is displayed when the text of the TextView
3493     * is empty.
3494     *
3495     * @attr ref android.R.styleable#TextView_hint
3496     */
3497    @ViewDebug.CapturedViewProperty
3498    public CharSequence getHint() {
3499        return mHint;
3500    }
3501
3502    private static boolean isMultilineInputType(int type) {
3503        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3504            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3505    }
3506
3507    /**
3508     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3509     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3510     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3511     * then a soft keyboard will not be displayed for this text view.
3512     *
3513     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3514     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3515     * type.
3516     *
3517     * @see #getInputType()
3518     * @see #setRawInputType(int)
3519     * @see android.text.InputType
3520     * @attr ref android.R.styleable#TextView_inputType
3521     */
3522    public void setInputType(int type) {
3523        final boolean wasPassword = isPasswordInputType(mInputType);
3524        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3525        setInputType(type, false);
3526        final boolean isPassword = isPasswordInputType(type);
3527        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3528        boolean forceUpdate = false;
3529        if (isPassword) {
3530            setTransformationMethod(PasswordTransformationMethod.getInstance());
3531            setTypefaceByIndex(MONOSPACE, 0);
3532        } else if (isVisiblePassword) {
3533            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3534                forceUpdate = true;
3535            }
3536            setTypefaceByIndex(MONOSPACE, 0);
3537        } else if (wasPassword || wasVisiblePassword) {
3538            // not in password mode, clean up typeface and transformation
3539            setTypefaceByIndex(-1, -1);
3540            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3541                forceUpdate = true;
3542            }
3543        }
3544
3545        boolean singleLine = !isMultilineInputType(type);
3546
3547        // We need to update the single line mode if it has changed or we
3548        // were previously in password mode.
3549        if (mSingleLine != singleLine || forceUpdate) {
3550            // Change single line mode, but only change the transformation if
3551            // we are not in password mode.
3552            applySingleLine(singleLine, !isPassword, true);
3553        }
3554
3555        if (!isSuggestionsEnabled()) {
3556            mText = removeSuggestionSpans(mText);
3557        }
3558
3559        InputMethodManager imm = InputMethodManager.peekInstance();
3560        if (imm != null) imm.restartInput(this);
3561    }
3562
3563    /**
3564     * It would be better to rely on the input type for everything. A password inputType should have
3565     * a password transformation. We should hence use isPasswordInputType instead of this method.
3566     *
3567     * We should:
3568     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3569     * would install the correct transformation).
3570     * - Refuse the installation of a non-password transformation in setTransformation if the input
3571     * type is password.
3572     *
3573     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3574     * is useful since it matches what the user can see (obfuscated text or not).
3575     *
3576     * @return true if the current transformation method is of the password type.
3577     */
3578    private boolean hasPasswordTransformationMethod() {
3579        return mTransformation instanceof PasswordTransformationMethod;
3580    }
3581
3582    private static boolean isPasswordInputType(int inputType) {
3583        final int variation =
3584                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3585        return variation
3586                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3587                || variation
3588                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3589                || variation
3590                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3591    }
3592
3593    private static boolean isVisiblePasswordInputType(int inputType) {
3594        final int variation =
3595                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3596        return variation
3597                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3598    }
3599
3600    /**
3601     * Directly change the content type integer of the text view, without
3602     * modifying any other state.
3603     * @see #setInputType(int)
3604     * @see android.text.InputType
3605     * @attr ref android.R.styleable#TextView_inputType
3606     */
3607    public void setRawInputType(int type) {
3608        mInputType = type;
3609    }
3610
3611    private void setInputType(int type, boolean direct) {
3612        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3613        KeyListener input;
3614        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3615            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3616            TextKeyListener.Capitalize cap;
3617            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3618                cap = TextKeyListener.Capitalize.CHARACTERS;
3619            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3620                cap = TextKeyListener.Capitalize.WORDS;
3621            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3622                cap = TextKeyListener.Capitalize.SENTENCES;
3623            } else {
3624                cap = TextKeyListener.Capitalize.NONE;
3625            }
3626            input = TextKeyListener.getInstance(autotext, cap);
3627        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3628            input = DigitsKeyListener.getInstance(
3629                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3630                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3631        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3632            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3633                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3634                    input = DateKeyListener.getInstance();
3635                    break;
3636                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3637                    input = TimeKeyListener.getInstance();
3638                    break;
3639                default:
3640                    input = DateTimeKeyListener.getInstance();
3641                    break;
3642            }
3643        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3644            input = DialerKeyListener.getInstance();
3645        } else {
3646            input = TextKeyListener.getInstance();
3647        }
3648        setRawInputType(type);
3649        if (direct) mInput = input;
3650        else {
3651            setKeyListenerOnly(input);
3652        }
3653    }
3654
3655    /**
3656     * Get the type of the content.
3657     *
3658     * @see #setInputType(int)
3659     * @see android.text.InputType
3660     */
3661    public int getInputType() {
3662        return mInputType;
3663    }
3664
3665    /**
3666     * Change the editor type integer associated with the text view, which
3667     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3668     * has focus.
3669     * @see #getImeOptions
3670     * @see android.view.inputmethod.EditorInfo
3671     * @attr ref android.R.styleable#TextView_imeOptions
3672     */
3673    public void setImeOptions(int imeOptions) {
3674        if (mInputContentType == null) {
3675            mInputContentType = new InputContentType();
3676        }
3677        mInputContentType.imeOptions = imeOptions;
3678    }
3679
3680    /**
3681     * Get the type of the IME editor.
3682     *
3683     * @see #setImeOptions(int)
3684     * @see android.view.inputmethod.EditorInfo
3685     */
3686    public int getImeOptions() {
3687        return mInputContentType != null
3688                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3689    }
3690
3691    /**
3692     * Change the custom IME action associated with the text view, which
3693     * will be reported to an IME with {@link EditorInfo#actionLabel}
3694     * and {@link EditorInfo#actionId} when it has focus.
3695     * @see #getImeActionLabel
3696     * @see #getImeActionId
3697     * @see android.view.inputmethod.EditorInfo
3698     * @attr ref android.R.styleable#TextView_imeActionLabel
3699     * @attr ref android.R.styleable#TextView_imeActionId
3700     */
3701    public void setImeActionLabel(CharSequence label, int actionId) {
3702        if (mInputContentType == null) {
3703            mInputContentType = new InputContentType();
3704        }
3705        mInputContentType.imeActionLabel = label;
3706        mInputContentType.imeActionId = actionId;
3707    }
3708
3709    /**
3710     * Get the IME action label previous set with {@link #setImeActionLabel}.
3711     *
3712     * @see #setImeActionLabel
3713     * @see android.view.inputmethod.EditorInfo
3714     */
3715    public CharSequence getImeActionLabel() {
3716        return mInputContentType != null
3717                ? mInputContentType.imeActionLabel : null;
3718    }
3719
3720    /**
3721     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3722     *
3723     * @see #setImeActionLabel
3724     * @see android.view.inputmethod.EditorInfo
3725     */
3726    public int getImeActionId() {
3727        return mInputContentType != null
3728                ? mInputContentType.imeActionId : 0;
3729    }
3730
3731    /**
3732     * Set a special listener to be called when an action is performed
3733     * on the text view.  This will be called when the enter key is pressed,
3734     * or when an action supplied to the IME is selected by the user.  Setting
3735     * this means that the normal hard key event will not insert a newline
3736     * into the text view, even if it is multi-line; holding down the ALT
3737     * modifier will, however, allow the user to insert a newline character.
3738     */
3739    public void setOnEditorActionListener(OnEditorActionListener l) {
3740        if (mInputContentType == null) {
3741            mInputContentType = new InputContentType();
3742        }
3743        mInputContentType.onEditorActionListener = l;
3744    }
3745
3746    /**
3747     * Called when an attached input method calls
3748     * {@link InputConnection#performEditorAction(int)
3749     * InputConnection.performEditorAction()}
3750     * for this text view.  The default implementation will call your action
3751     * listener supplied to {@link #setOnEditorActionListener}, or perform
3752     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3753     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3754     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3755     * EditorInfo.IME_ACTION_DONE}.
3756     *
3757     * <p>For backwards compatibility, if no IME options have been set and the
3758     * text view would not normally advance focus on enter, then
3759     * the NEXT and DONE actions received here will be turned into an enter
3760     * key down/up pair to go through the normal key handling.
3761     *
3762     * @param actionCode The code of the action being performed.
3763     *
3764     * @see #setOnEditorActionListener
3765     */
3766    public void onEditorAction(int actionCode) {
3767        final InputContentType ict = mInputContentType;
3768        if (ict != null) {
3769            if (ict.onEditorActionListener != null) {
3770                if (ict.onEditorActionListener.onEditorAction(this,
3771                        actionCode, null)) {
3772                    return;
3773                }
3774            }
3775
3776            // This is the handling for some default action.
3777            // Note that for backwards compatibility we don't do this
3778            // default handling if explicit ime options have not been given,
3779            // instead turning this into the normal enter key codes that an
3780            // app may be expecting.
3781            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3782                View v = focusSearch(FOCUS_FORWARD);
3783                if (v != null) {
3784                    if (!v.requestFocus(FOCUS_FORWARD)) {
3785                        throw new IllegalStateException("focus search returned a view " +
3786                                "that wasn't able to take focus!");
3787                    }
3788                }
3789                return;
3790
3791            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3792                View v = focusSearch(FOCUS_BACKWARD);
3793                if (v != null) {
3794                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3795                        throw new IllegalStateException("focus search returned a view " +
3796                                "that wasn't able to take focus!");
3797                    }
3798                }
3799                return;
3800
3801            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3802                InputMethodManager imm = InputMethodManager.peekInstance();
3803                if (imm != null && imm.isActive(this)) {
3804                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3805                }
3806                return;
3807            }
3808        }
3809
3810        Handler h = getHandler();
3811        if (h != null) {
3812            long eventTime = SystemClock.uptimeMillis();
3813            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3814                    new KeyEvent(eventTime, eventTime,
3815                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3816                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3817                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3818                    | KeyEvent.FLAG_EDITOR_ACTION)));
3819            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3820                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3821                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3822                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3823                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3824                    | KeyEvent.FLAG_EDITOR_ACTION)));
3825        }
3826    }
3827
3828    /**
3829     * Set the private content type of the text, which is the
3830     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3831     * field that will be filled in when creating an input connection.
3832     *
3833     * @see #getPrivateImeOptions()
3834     * @see EditorInfo#privateImeOptions
3835     * @attr ref android.R.styleable#TextView_privateImeOptions
3836     */
3837    public void setPrivateImeOptions(String type) {
3838        if (mInputContentType == null) mInputContentType = new InputContentType();
3839        mInputContentType.privateImeOptions = type;
3840    }
3841
3842    /**
3843     * Get the private type of the content.
3844     *
3845     * @see #setPrivateImeOptions(String)
3846     * @see EditorInfo#privateImeOptions
3847     */
3848    public String getPrivateImeOptions() {
3849        return mInputContentType != null
3850                ? mInputContentType.privateImeOptions : null;
3851    }
3852
3853    /**
3854     * Set the extra input data of the text, which is the
3855     * {@link EditorInfo#extras TextBoxAttribute.extras}
3856     * Bundle that will be filled in when creating an input connection.  The
3857     * given integer is the resource ID of an XML resource holding an
3858     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3859     *
3860     * @see #getInputExtras(boolean)
3861     * @see EditorInfo#extras
3862     * @attr ref android.R.styleable#TextView_editorExtras
3863     */
3864    public void setInputExtras(int xmlResId)
3865            throws XmlPullParserException, IOException {
3866        XmlResourceParser parser = getResources().getXml(xmlResId);
3867        if (mInputContentType == null) mInputContentType = new InputContentType();
3868        mInputContentType.extras = new Bundle();
3869        getResources().parseBundleExtras(parser, mInputContentType.extras);
3870    }
3871
3872    /**
3873     * Retrieve the input extras currently associated with the text view, which
3874     * can be viewed as well as modified.
3875     *
3876     * @param create If true, the extras will be created if they don't already
3877     * exist.  Otherwise, null will be returned if none have been created.
3878     * @see #setInputExtras(int)
3879     * @see EditorInfo#extras
3880     * @attr ref android.R.styleable#TextView_editorExtras
3881     */
3882    public Bundle getInputExtras(boolean create) {
3883        if (mInputContentType == null) {
3884            if (!create) return null;
3885            mInputContentType = new InputContentType();
3886        }
3887        if (mInputContentType.extras == null) {
3888            if (!create) return null;
3889            mInputContentType.extras = new Bundle();
3890        }
3891        return mInputContentType.extras;
3892    }
3893
3894    /**
3895     * Returns the error message that was set to be displayed with
3896     * {@link #setError}, or <code>null</code> if no error was set
3897     * or if it the error was cleared by the widget after user input.
3898     */
3899    public CharSequence getError() {
3900        return mError;
3901    }
3902
3903    /**
3904     * Sets the right-hand compound drawable of the TextView to the "error"
3905     * icon and sets an error message that will be displayed in a popup when
3906     * the TextView has focus.  The icon and error message will be reset to
3907     * null when any key events cause changes to the TextView's text.  If the
3908     * <code>error</code> is <code>null</code>, the error message and icon
3909     * will be cleared.
3910     */
3911    @android.view.RemotableViewMethod
3912    public void setError(CharSequence error) {
3913        if (error == null) {
3914            setError(null, null);
3915        } else {
3916            Drawable dr = getContext().getResources().
3917                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3918
3919            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3920            setError(error, dr);
3921        }
3922    }
3923
3924    /**
3925     * Sets the right-hand compound drawable of the TextView to the specified
3926     * icon and sets an error message that will be displayed in a popup when
3927     * the TextView has focus.  The icon and error message will be reset to
3928     * null when any key events cause changes to the TextView's text.  The
3929     * drawable must already have had {@link Drawable#setBounds} set on it.
3930     * If the <code>error</code> is <code>null</code>, the error message will
3931     * be cleared (and you should provide a <code>null</code> icon as well).
3932     */
3933    public void setError(CharSequence error, Drawable icon) {
3934        error = TextUtils.stringOrSpannedString(error);
3935
3936        mError = error;
3937        mErrorWasChanged = true;
3938        final Drawables dr = mDrawables;
3939        if (dr != null) {
3940            switch (getResolvedLayoutDirection()) {
3941                default:
3942                case LAYOUT_DIRECTION_LTR:
3943                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3944                            dr.mDrawableBottom);
3945                    break;
3946                case LAYOUT_DIRECTION_RTL:
3947                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3948                            dr.mDrawableBottom);
3949                    break;
3950            }
3951        } else {
3952            setCompoundDrawables(null, null, icon, null);
3953        }
3954
3955        if (error == null) {
3956            if (mPopup != null) {
3957                if (mPopup.isShowing()) {
3958                    mPopup.dismiss();
3959                }
3960
3961                mPopup = null;
3962            }
3963        } else {
3964            if (isFocused()) {
3965                showError();
3966            }
3967        }
3968    }
3969
3970    private void showError() {
3971        if (getWindowToken() == null) {
3972            mShowErrorAfterAttach = true;
3973            return;
3974        }
3975
3976        if (mPopup == null) {
3977            LayoutInflater inflater = LayoutInflater.from(getContext());
3978            final TextView err = (TextView) inflater.inflate(
3979                    com.android.internal.R.layout.textview_hint, null);
3980
3981            final float scale = getResources().getDisplayMetrics().density;
3982            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3983            mPopup.setFocusable(false);
3984            // The user is entering text, so the input method is needed.  We
3985            // don't want the popup to be displayed on top of it.
3986            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3987        }
3988
3989        TextView tv = (TextView) mPopup.getContentView();
3990        chooseSize(mPopup, mError, tv);
3991        tv.setText(mError);
3992
3993        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3994        mPopup.fixDirection(mPopup.isAboveAnchor());
3995    }
3996
3997    private static class ErrorPopup extends PopupWindow {
3998        private boolean mAbove = false;
3999        private final TextView mView;
4000        private int mPopupInlineErrorBackgroundId = 0;
4001        private int mPopupInlineErrorAboveBackgroundId = 0;
4002
4003        ErrorPopup(TextView v, int width, int height) {
4004            super(v, width, height);
4005            mView = v;
4006            // Make sure the TextView has a background set as it will be used the first time it is
4007            // shown and positionned. Initialized with below background, which should have
4008            // dimensions identical to the above version for this to work (and is more likely).
4009            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4010                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4011            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4012        }
4013
4014        void fixDirection(boolean above) {
4015            mAbove = above;
4016
4017            if (above) {
4018                mPopupInlineErrorAboveBackgroundId =
4019                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4020                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4021            } else {
4022                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4023                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4024            }
4025
4026            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4027                mPopupInlineErrorBackgroundId);
4028        }
4029
4030        private int getResourceId(int currentId, int index) {
4031            if (currentId == 0) {
4032                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4033                        R.styleable.Theme);
4034                currentId = styledAttributes.getResourceId(index, 0);
4035                styledAttributes.recycle();
4036            }
4037            return currentId;
4038        }
4039
4040        @Override
4041        public void update(int x, int y, int w, int h, boolean force) {
4042            super.update(x, y, w, h, force);
4043
4044            boolean above = isAboveAnchor();
4045            if (above != mAbove) {
4046                fixDirection(above);
4047            }
4048        }
4049    }
4050
4051    /**
4052     * Returns the Y offset to make the pointy top of the error point
4053     * at the middle of the error icon.
4054     */
4055    private int getErrorX() {
4056        /*
4057         * The "25" is the distance between the point and the right edge
4058         * of the background
4059         */
4060        final float scale = getResources().getDisplayMetrics().density;
4061
4062        final Drawables dr = mDrawables;
4063        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4064                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4065    }
4066
4067    /**
4068     * Returns the Y offset to make the pointy top of the error point
4069     * at the bottom of the error icon.
4070     */
4071    private int getErrorY() {
4072        /*
4073         * Compound, not extended, because the icon is not clipped
4074         * if the text height is smaller.
4075         */
4076        final int compoundPaddingTop = getCompoundPaddingTop();
4077        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4078
4079        final Drawables dr = mDrawables;
4080        int icontop = compoundPaddingTop +
4081                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4082
4083        /*
4084         * The "2" is the distance between the point and the top edge
4085         * of the background.
4086         */
4087        final float scale = getResources().getDisplayMetrics().density;
4088        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4089                (int) (2 * scale + 0.5f);
4090    }
4091
4092    private void hideError() {
4093        if (mPopup != null) {
4094            if (mPopup.isShowing()) {
4095                mPopup.dismiss();
4096            }
4097        }
4098
4099        mShowErrorAfterAttach = false;
4100    }
4101
4102    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4103        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4104        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4105
4106        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4107                com.android.internal.R.dimen.textview_error_popup_default_width);
4108        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4109                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4110        float max = 0;
4111        for (int i = 0; i < l.getLineCount(); i++) {
4112            max = Math.max(max, l.getLineWidth(i));
4113        }
4114
4115        /*
4116         * Now set the popup size to be big enough for the text plus the border capped
4117         * to DEFAULT_MAX_POPUP_WIDTH
4118         */
4119        pop.setWidth(wid + (int) Math.ceil(max));
4120        pop.setHeight(ht + l.getHeight());
4121    }
4122
4123
4124    @Override
4125    protected boolean setFrame(int l, int t, int r, int b) {
4126        boolean result = super.setFrame(l, t, r, b);
4127
4128        if (mPopup != null) {
4129            TextView tv = (TextView) mPopup.getContentView();
4130            chooseSize(mPopup, mError, tv);
4131            mPopup.update(this, getErrorX(), getErrorY(),
4132                          mPopup.getWidth(), mPopup.getHeight());
4133        }
4134
4135        restartMarqueeIfNeeded();
4136
4137        return result;
4138    }
4139
4140    private void restartMarqueeIfNeeded() {
4141        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4142            mRestartMarquee = false;
4143            startMarquee();
4144        }
4145    }
4146
4147    /**
4148     * Sets the list of input filters that will be used if the buffer is
4149     * Editable.  Has no effect otherwise.
4150     *
4151     * @attr ref android.R.styleable#TextView_maxLength
4152     */
4153    public void setFilters(InputFilter[] filters) {
4154        if (filters == null) {
4155            throw new IllegalArgumentException();
4156        }
4157
4158        mFilters = filters;
4159
4160        if (mText instanceof Editable) {
4161            setFilters((Editable) mText, filters);
4162        }
4163    }
4164
4165    /**
4166     * Sets the list of input filters on the specified Editable,
4167     * and includes mInput in the list if it is an InputFilter.
4168     */
4169    private void setFilters(Editable e, InputFilter[] filters) {
4170        if (mInput instanceof InputFilter) {
4171            InputFilter[] nf = new InputFilter[filters.length + 1];
4172
4173            System.arraycopy(filters, 0, nf, 0, filters.length);
4174            nf[filters.length] = (InputFilter) mInput;
4175
4176            e.setFilters(nf);
4177        } else {
4178            e.setFilters(filters);
4179        }
4180    }
4181
4182    /**
4183     * Returns the current list of input filters.
4184     */
4185    public InputFilter[] getFilters() {
4186        return mFilters;
4187    }
4188
4189    /////////////////////////////////////////////////////////////////////////
4190
4191    private int getVerticalOffset(boolean forceNormal) {
4192        int voffset = 0;
4193        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4194
4195        Layout l = mLayout;
4196        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4197            l = mHintLayout;
4198        }
4199
4200        if (gravity != Gravity.TOP) {
4201            int boxht;
4202
4203            if (l == mHintLayout) {
4204                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4205                        getCompoundPaddingBottom();
4206            } else {
4207                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4208                        getExtendedPaddingBottom();
4209            }
4210            int textht = l.getHeight();
4211
4212            if (textht < boxht) {
4213                if (gravity == Gravity.BOTTOM)
4214                    voffset = boxht - textht;
4215                else // (gravity == Gravity.CENTER_VERTICAL)
4216                    voffset = (boxht - textht) >> 1;
4217            }
4218        }
4219        return voffset;
4220    }
4221
4222    private int getBottomVerticalOffset(boolean forceNormal) {
4223        int voffset = 0;
4224        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4225
4226        Layout l = mLayout;
4227        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4228            l = mHintLayout;
4229        }
4230
4231        if (gravity != Gravity.BOTTOM) {
4232            int boxht;
4233
4234            if (l == mHintLayout) {
4235                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4236                        getCompoundPaddingBottom();
4237            } else {
4238                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4239                        getExtendedPaddingBottom();
4240            }
4241            int textht = l.getHeight();
4242
4243            if (textht < boxht) {
4244                if (gravity == Gravity.TOP)
4245                    voffset = boxht - textht;
4246                else // (gravity == Gravity.CENTER_VERTICAL)
4247                    voffset = (boxht - textht) >> 1;
4248            }
4249        }
4250        return voffset;
4251    }
4252
4253    private void invalidateCursorPath() {
4254        if (mHighlightPathBogus) {
4255            invalidateCursor();
4256        } else {
4257            final int horizontalPadding = getCompoundPaddingLeft();
4258            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4259
4260            if (mCursorCount == 0) {
4261                synchronized (sTempRect) {
4262                    /*
4263                     * The reason for this concern about the thickness of the
4264                     * cursor and doing the floor/ceil on the coordinates is that
4265                     * some EditTexts (notably textfields in the Browser) have
4266                     * anti-aliased text where not all the characters are
4267                     * necessarily at integer-multiple locations.  This should
4268                     * make sure the entire cursor gets invalidated instead of
4269                     * sometimes missing half a pixel.
4270                     */
4271                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4272                    if (thick < 1.0f) {
4273                        thick = 1.0f;
4274                    }
4275
4276                    thick /= 2.0f;
4277
4278                    mHighlightPath.computeBounds(sTempRect, false);
4279
4280                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4281                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4282                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4283                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4284                }
4285            } else {
4286                for (int i = 0; i < mCursorCount; i++) {
4287                    Rect bounds = mCursorDrawable[i].getBounds();
4288                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4289                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4290                }
4291            }
4292        }
4293    }
4294
4295    private void invalidateCursor() {
4296        int where = getSelectionEnd();
4297
4298        invalidateCursor(where, where, where);
4299    }
4300
4301    private void invalidateCursor(int a, int b, int c) {
4302        if (a >= 0 || b >= 0 || c >= 0) {
4303            int start = Math.min(Math.min(a, b), c);
4304            int end = Math.max(Math.max(a, b), c);
4305            invalidateRegion(start, end, true /* Also invalidates blinking cursor */);
4306        }
4307    }
4308
4309    /**
4310     * Invalidates the region of text enclosed between the start and end text offsets.
4311     *
4312     * @hide
4313     */
4314    void invalidateRegion(int start, int end, boolean invalidateCursor) {
4315        if (mLayout == null) {
4316            invalidate();
4317        } else {
4318                int lineStart = mLayout.getLineForOffset(start);
4319                int top = mLayout.getLineTop(lineStart);
4320
4321                // This is ridiculous, but the descent from the line above
4322                // can hang down into the line we really want to redraw,
4323                // so we have to invalidate part of the line above to make
4324                // sure everything that needs to be redrawn really is.
4325                // (But not the whole line above, because that would cause
4326                // the same problem with the descenders on the line above it!)
4327                if (lineStart > 0) {
4328                    top -= mLayout.getLineDescent(lineStart - 1);
4329                }
4330
4331                int lineEnd;
4332
4333                if (start == end)
4334                    lineEnd = lineStart;
4335                else
4336                    lineEnd = mLayout.getLineForOffset(end);
4337
4338                int bottom = mLayout.getLineBottom(lineEnd);
4339
4340                if (invalidateCursor) {
4341                    for (int i = 0; i < mCursorCount; i++) {
4342                        Rect bounds = mCursorDrawable[i].getBounds();
4343                        top = Math.min(top, bounds.top);
4344                        bottom = Math.max(bottom, bounds.bottom);
4345                    }
4346                }
4347
4348                final int compoundPaddingLeft = getCompoundPaddingLeft();
4349                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4350
4351                int left, right;
4352                if (lineStart == lineEnd && !invalidateCursor) {
4353                    left = (int) mLayout.getPrimaryHorizontal(start);
4354                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4355                    left += compoundPaddingLeft;
4356                    right += compoundPaddingLeft;
4357                } else {
4358                    // Rectangle bounding box when the region spans several lines
4359                    left = compoundPaddingLeft;
4360                    right = getWidth() - getCompoundPaddingRight();
4361                }
4362
4363                invalidate(mScrollX + left, verticalPadding + top,
4364                        mScrollX + right, verticalPadding + bottom);
4365        }
4366    }
4367
4368    private void registerForPreDraw() {
4369        if (!mPreDrawRegistered) {
4370            getViewTreeObserver().addOnPreDrawListener(this);
4371            mPreDrawRegistered = true;
4372        }
4373    }
4374
4375    /**
4376     * {@inheritDoc}
4377     */
4378    public boolean onPreDraw() {
4379        if (mLayout == null) {
4380            assumeLayout();
4381        }
4382
4383        boolean changed = false;
4384
4385        if (mMovement != null) {
4386            /* This code also provides auto-scrolling when a cursor is moved using a
4387             * CursorController (insertion point or selection limits).
4388             * For selection, ensure start or end is visible depending on controller's state.
4389             */
4390            int curs = getSelectionEnd();
4391            // Do not create the controller if it is not already created.
4392            if (mSelectionModifierCursorController != null &&
4393                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4394                curs = getSelectionStart();
4395            }
4396
4397            /*
4398             * TODO: This should really only keep the end in view if
4399             * it already was before the text changed.  I'm not sure
4400             * of a good way to tell from here if it was.
4401             */
4402            if (curs < 0 &&
4403                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4404                curs = mText.length();
4405            }
4406
4407            if (curs >= 0) {
4408                changed = bringPointIntoView(curs);
4409            }
4410        } else {
4411            changed = bringTextIntoView();
4412        }
4413
4414        // This has to be checked here since:
4415        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4416        //   a screen rotation) since layout is not yet initialized at that point.
4417        if (mCreatedWithASelection) {
4418            startSelectionActionMode();
4419            mCreatedWithASelection = false;
4420        }
4421
4422        // Phone specific code (there is no ExtractEditText on tablets).
4423        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4424        // not be set. Do the test here instead.
4425        if (this instanceof ExtractEditText && hasSelection()) {
4426            startSelectionActionMode();
4427        }
4428
4429        getViewTreeObserver().removeOnPreDrawListener(this);
4430        mPreDrawRegistered = false;
4431
4432        return !changed;
4433    }
4434
4435    @Override
4436    protected void onAttachedToWindow() {
4437        super.onAttachedToWindow();
4438
4439        mTemporaryDetach = false;
4440
4441        if (mShowErrorAfterAttach) {
4442            showError();
4443            mShowErrorAfterAttach = false;
4444        }
4445
4446        final ViewTreeObserver observer = getViewTreeObserver();
4447        // No need to create the controller.
4448        // The get method will add the listener on controller creation.
4449        if (mInsertionPointCursorController != null) {
4450            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4451        }
4452        if (mSelectionModifierCursorController != null) {
4453            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4454        }
4455
4456        // Resolve drawables as the layout direction has been resolved
4457        resolveDrawables();
4458
4459        updateSpellCheckSpans(0, mText.length(), true /* create the spell checker if needed */);
4460    }
4461
4462    @Override
4463    protected void onDetachedFromWindow() {
4464        super.onDetachedFromWindow();
4465
4466        if (mPreDrawRegistered) {
4467            getViewTreeObserver().removeOnPreDrawListener(this);
4468            mPreDrawRegistered = false;
4469        }
4470
4471        if (mError != null) {
4472            hideError();
4473        }
4474
4475        if (mBlink != null) {
4476            mBlink.removeCallbacks(mBlink);
4477        }
4478
4479        if (mInsertionPointCursorController != null) {
4480            mInsertionPointCursorController.onDetached();
4481        }
4482
4483        if (mSelectionModifierCursorController != null) {
4484            mSelectionModifierCursorController.onDetached();
4485        }
4486
4487        if (mShowSuggestionRunnable != null) {
4488            removeCallbacks(mShowSuggestionRunnable);
4489        }
4490
4491        hideControllers();
4492
4493        resetResolvedDrawables();
4494
4495        if (mTextDisplayList != null) {
4496            mTextDisplayList.invalidate();
4497        }
4498
4499        if (mSpellChecker != null) {
4500            mSpellChecker.closeSession();
4501            // Forces the creation of a new SpellChecker next time this window is created.
4502            // Will handle the cases where the settings has been changed in the meantime.
4503            mSpellChecker = null;
4504        }
4505    }
4506
4507    @Override
4508    protected boolean isPaddingOffsetRequired() {
4509        return mShadowRadius != 0 || mDrawables != null;
4510    }
4511
4512    @Override
4513    protected int getLeftPaddingOffset() {
4514        return getCompoundPaddingLeft() - mPaddingLeft +
4515                (int) Math.min(0, mShadowDx - mShadowRadius);
4516    }
4517
4518    @Override
4519    protected int getTopPaddingOffset() {
4520        return (int) Math.min(0, mShadowDy - mShadowRadius);
4521    }
4522
4523    @Override
4524    protected int getBottomPaddingOffset() {
4525        return (int) Math.max(0, mShadowDy + mShadowRadius);
4526    }
4527
4528    @Override
4529    protected int getRightPaddingOffset() {
4530        return -(getCompoundPaddingRight() - mPaddingRight) +
4531                (int) Math.max(0, mShadowDx + mShadowRadius);
4532    }
4533
4534    @Override
4535    protected boolean verifyDrawable(Drawable who) {
4536        final boolean verified = super.verifyDrawable(who);
4537        if (!verified && mDrawables != null) {
4538            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4539                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4540                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4541        }
4542        return verified;
4543    }
4544
4545    @Override
4546    public void jumpDrawablesToCurrentState() {
4547        super.jumpDrawablesToCurrentState();
4548        if (mDrawables != null) {
4549            if (mDrawables.mDrawableLeft != null) {
4550                mDrawables.mDrawableLeft.jumpToCurrentState();
4551            }
4552            if (mDrawables.mDrawableTop != null) {
4553                mDrawables.mDrawableTop.jumpToCurrentState();
4554            }
4555            if (mDrawables.mDrawableRight != null) {
4556                mDrawables.mDrawableRight.jumpToCurrentState();
4557            }
4558            if (mDrawables.mDrawableBottom != null) {
4559                mDrawables.mDrawableBottom.jumpToCurrentState();
4560            }
4561            if (mDrawables.mDrawableStart != null) {
4562                mDrawables.mDrawableStart.jumpToCurrentState();
4563            }
4564            if (mDrawables.mDrawableEnd != null) {
4565                mDrawables.mDrawableEnd.jumpToCurrentState();
4566            }
4567        }
4568    }
4569
4570    @Override
4571    public void invalidateDrawable(Drawable drawable) {
4572        if (verifyDrawable(drawable)) {
4573            final Rect dirty = drawable.getBounds();
4574            int scrollX = mScrollX;
4575            int scrollY = mScrollY;
4576
4577            // IMPORTANT: The coordinates below are based on the coordinates computed
4578            // for each compound drawable in onDraw(). Make sure to update each section
4579            // accordingly.
4580            final TextView.Drawables drawables = mDrawables;
4581            if (drawables != null) {
4582                if (drawable == drawables.mDrawableLeft) {
4583                    final int compoundPaddingTop = getCompoundPaddingTop();
4584                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4585                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4586
4587                    scrollX += mPaddingLeft;
4588                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4589                } else if (drawable == drawables.mDrawableRight) {
4590                    final int compoundPaddingTop = getCompoundPaddingTop();
4591                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4592                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4593
4594                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4595                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4596                } else if (drawable == drawables.mDrawableTop) {
4597                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4598                    final int compoundPaddingRight = getCompoundPaddingRight();
4599                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4600
4601                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4602                    scrollY += mPaddingTop;
4603                } else if (drawable == drawables.mDrawableBottom) {
4604                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4605                    final int compoundPaddingRight = getCompoundPaddingRight();
4606                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4607
4608                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4609                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4610                }
4611            }
4612
4613            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4614                    dirty.right + scrollX, dirty.bottom + scrollY);
4615        }
4616    }
4617
4618    /**
4619     * @hide
4620     */
4621    @Override
4622    public int getResolvedLayoutDirection(Drawable who) {
4623        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4624        if (mDrawables != null) {
4625            final Drawables drawables = mDrawables;
4626            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4627                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4628                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4629                return getResolvedLayoutDirection();
4630            }
4631        }
4632        return super.getResolvedLayoutDirection(who);
4633    }
4634
4635    @Override
4636    protected boolean onSetAlpha(int alpha) {
4637        // Alpha is supported if and only if the drawing can be done in one pass.
4638        // TODO text with spans with a background color currently do not respect this alpha.
4639        if (getBackground() == null) {
4640            if (mCurrentAlpha != alpha) {
4641                mCurrentAlpha = alpha;
4642                final Drawables dr = mDrawables;
4643                if (dr != null) {
4644                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4645                    if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4646                    if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4647                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4648                    if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4649                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4650                }
4651                mTextDisplayListIsValid = false;
4652            }
4653            return true;
4654        }
4655
4656        if (mCurrentAlpha != 255) {
4657            mTextDisplayListIsValid = false;
4658        }
4659        mCurrentAlpha = 255;
4660        return false;
4661    }
4662
4663    /**
4664     * When a TextView is used to display a useful piece of information to the user (such as a
4665     * contact's address), it should be made selectable, so that the user can select and copy this
4666     * content.
4667     *
4668     * Use {@link #setTextIsSelectable(boolean)} or the
4669     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4670     * selectable (text is not selectable by default).
4671     *
4672     * Note that this method simply returns the state of this flag. Although this flag has to be set
4673     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4674     * always be selected, independently of the value of this flag.
4675     *
4676     * @return True if the text displayed in this TextView can be selected by the user.
4677     *
4678     * @attr ref android.R.styleable#TextView_textIsSelectable
4679     */
4680    public boolean isTextSelectable() {
4681        return mTextIsSelectable;
4682    }
4683
4684    /**
4685     * Sets whether or not (default) the content of this view is selectable by the user.
4686     *
4687     * Note that this methods affect the {@link #setFocusable(boolean)},
4688     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4689     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4690     * customized.
4691     *
4692     * See {@link #isTextSelectable} for details.
4693     *
4694     * @param selectable Whether or not the content of this TextView should be selectable.
4695     */
4696    public void setTextIsSelectable(boolean selectable) {
4697        if (mTextIsSelectable == selectable) return;
4698
4699        mTextIsSelectable = selectable;
4700
4701        setFocusableInTouchMode(selectable);
4702        setFocusable(selectable);
4703        setClickable(selectable);
4704        setLongClickable(selectable);
4705
4706        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4707
4708        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4709        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4710
4711        // Called by setText above, but safer in case of future code changes
4712        prepareCursorControllers();
4713    }
4714
4715    @Override
4716    protected int[] onCreateDrawableState(int extraSpace) {
4717        final int[] drawableState;
4718
4719        if (mSingleLine) {
4720            drawableState = super.onCreateDrawableState(extraSpace);
4721        } else {
4722            drawableState = super.onCreateDrawableState(extraSpace + 1);
4723            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4724        }
4725
4726        if (mTextIsSelectable) {
4727            // Disable pressed state, which was introduced when TextView was made clickable.
4728            // Prevents text color change.
4729            // setClickable(false) would have a similar effect, but it also disables focus changes
4730            // and long press actions, which are both needed by text selection.
4731            final int length = drawableState.length;
4732            for (int i = 0; i < length; i++) {
4733                if (drawableState[i] == R.attr.state_pressed) {
4734                    final int[] nonPressedState = new int[length - 1];
4735                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4736                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4737                    return nonPressedState;
4738                }
4739            }
4740        }
4741
4742        return drawableState;
4743    }
4744
4745    @Override
4746    protected void onDraw(Canvas canvas) {
4747        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4748
4749        restartMarqueeIfNeeded();
4750
4751        // Draw the background for this view
4752        super.onDraw(canvas);
4753
4754        final int compoundPaddingLeft = getCompoundPaddingLeft();
4755        final int compoundPaddingTop = getCompoundPaddingTop();
4756        final int compoundPaddingRight = getCompoundPaddingRight();
4757        final int compoundPaddingBottom = getCompoundPaddingBottom();
4758        final int scrollX = mScrollX;
4759        final int scrollY = mScrollY;
4760        final int right = mRight;
4761        final int left = mLeft;
4762        final int bottom = mBottom;
4763        final int top = mTop;
4764
4765        final Drawables dr = mDrawables;
4766        if (dr != null) {
4767            /*
4768             * Compound, not extended, because the icon is not clipped
4769             * if the text height is smaller.
4770             */
4771
4772            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4773            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4774
4775            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4776            // Make sure to update invalidateDrawable() when changing this code.
4777            if (dr.mDrawableLeft != null) {
4778                canvas.save();
4779                canvas.translate(scrollX + mPaddingLeft,
4780                                 scrollY + compoundPaddingTop +
4781                                 (vspace - dr.mDrawableHeightLeft) / 2);
4782                dr.mDrawableLeft.draw(canvas);
4783                canvas.restore();
4784            }
4785
4786            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4787            // Make sure to update invalidateDrawable() when changing this code.
4788            if (dr.mDrawableRight != null) {
4789                canvas.save();
4790                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4791                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4792                dr.mDrawableRight.draw(canvas);
4793                canvas.restore();
4794            }
4795
4796            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4797            // Make sure to update invalidateDrawable() when changing this code.
4798            if (dr.mDrawableTop != null) {
4799                canvas.save();
4800                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4801                        scrollY + mPaddingTop);
4802                dr.mDrawableTop.draw(canvas);
4803                canvas.restore();
4804            }
4805
4806            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4807            // Make sure to update invalidateDrawable() when changing this code.
4808            if (dr.mDrawableBottom != null) {
4809                canvas.save();
4810                canvas.translate(scrollX + compoundPaddingLeft +
4811                        (hspace - dr.mDrawableWidthBottom) / 2,
4812                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4813                dr.mDrawableBottom.draw(canvas);
4814                canvas.restore();
4815            }
4816        }
4817
4818        int color = mCurTextColor;
4819
4820        if (mLayout == null) {
4821            assumeLayout();
4822        }
4823
4824        Layout layout = mLayout;
4825        int cursorcolor = color;
4826
4827        if (mHint != null && mText.length() == 0) {
4828            if (mHintTextColor != null) {
4829                color = mCurHintTextColor;
4830            }
4831
4832            layout = mHintLayout;
4833        }
4834
4835        mTextPaint.setColor(color);
4836        if (mCurrentAlpha != 255) {
4837            // If set, the alpha will override the color's alpha. Multiply the alphas.
4838            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4839        }
4840        mTextPaint.drawableState = getDrawableState();
4841
4842        canvas.save();
4843        /*  Would be faster if we didn't have to do this. Can we chop the
4844            (displayable) text so that we don't need to do this ever?
4845        */
4846
4847        int extendedPaddingTop = getExtendedPaddingTop();
4848        int extendedPaddingBottom = getExtendedPaddingBottom();
4849
4850        final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4851        final int maxScrollY = mLayout.getHeight() - vspace;
4852
4853        float clipLeft = compoundPaddingLeft + scrollX;
4854        float clipTop = (scrollY == 0) ? 0 : extendedPaddingTop + scrollY;
4855        float clipRight = right - left - compoundPaddingRight + scrollX;
4856        float clipBottom = bottom - top + scrollY -
4857                ((scrollY == maxScrollY) ? 0 : extendedPaddingBottom);
4858
4859        if (mShadowRadius != 0) {
4860            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4861            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4862
4863            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4864            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4865        }
4866
4867        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4868
4869        int voffsetText = 0;
4870        int voffsetCursor = 0;
4871
4872        // translate in by our padding
4873        {
4874            /* shortcircuit calling getVerticaOffset() */
4875            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4876                voffsetText = getVerticalOffset(false);
4877                voffsetCursor = getVerticalOffset(true);
4878            }
4879            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4880        }
4881
4882        final int layoutDirection = getResolvedLayoutDirection();
4883        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4884        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4885                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4886            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4887                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4888                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4889                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4890            }
4891
4892            if (mMarquee != null && mMarquee.isRunning()) {
4893                canvas.translate(-mMarquee.mScroll, 0.0f);
4894            }
4895        }
4896
4897        Path highlight = null;
4898        int selStart = -1, selEnd = -1;
4899        boolean drawCursor = false;
4900
4901        //  If there is no movement method, then there can be no selection.
4902        //  Check that first and attempt to skip everything having to do with
4903        //  the cursor.
4904        //  XXX This is not strictly true -- a program could set the
4905        //  selection manually if it really wanted to.
4906        if (mMovement != null && (isFocused() || isPressed())) {
4907            selStart = getSelectionStart();
4908            selEnd = getSelectionEnd();
4909
4910            if (selStart >= 0) {
4911                if (mHighlightPath == null) mHighlightPath = new Path();
4912
4913                if (selStart == selEnd) {
4914                    if (isCursorVisible() &&
4915                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4916                        if (mHighlightPathBogus) {
4917                            mHighlightPath.reset();
4918                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4919                            updateCursorsPositions();
4920                            mHighlightPathBogus = false;
4921                        }
4922
4923                        // XXX should pass to skin instead of drawing directly
4924                        mHighlightPaint.setColor(cursorcolor);
4925                        if (mCurrentAlpha != 255) {
4926                            mHighlightPaint.setAlpha(
4927                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4928                        }
4929                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4930                        highlight = mHighlightPath;
4931                        drawCursor = mCursorCount > 0;
4932                    }
4933                } else if (textCanBeSelected()) {
4934                    if (mHighlightPathBogus) {
4935                        mHighlightPath.reset();
4936                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4937                        mHighlightPathBogus = false;
4938                    }
4939
4940                    // XXX should pass to skin instead of drawing directly
4941                    mHighlightPaint.setColor(mHighlightColor);
4942                    if (mCurrentAlpha != 255) {
4943                        mHighlightPaint.setAlpha(
4944                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4945                    }
4946                    mHighlightPaint.setStyle(Paint.Style.FILL);
4947
4948                    highlight = mHighlightPath;
4949                }
4950            }
4951        }
4952
4953        final InputMethodState ims = mInputMethodState;
4954        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4955        if (ims != null && ims.mBatchEditNesting == 0) {
4956            InputMethodManager imm = InputMethodManager.peekInstance();
4957            if (imm != null) {
4958                if (imm.isActive(this)) {
4959                    boolean reported = false;
4960                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4961                        // We are in extract mode and the content has changed
4962                        // in some way... just report complete new text to the
4963                        // input method.
4964                        reported = reportExtractedText();
4965                    }
4966                    if (!reported && highlight != null) {
4967                        int candStart = -1;
4968                        int candEnd = -1;
4969                        if (mText instanceof Spannable) {
4970                            Spannable sp = (Spannable)mText;
4971                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4972                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4973                        }
4974                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4975                    }
4976                }
4977
4978                if (imm.isWatchingCursor(this) && highlight != null) {
4979                    highlight.computeBounds(ims.mTmpRectF, true);
4980                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4981
4982                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4983                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4984
4985                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4986
4987                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4988                            (int)(ims.mTmpRectF.top + 0.5),
4989                            (int)(ims.mTmpRectF.right + 0.5),
4990                            (int)(ims.mTmpRectF.bottom + 0.5));
4991
4992                    imm.updateCursor(this,
4993                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4994                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4995                }
4996            }
4997        }
4998
4999        if (mCorrectionHighlighter != null) {
5000            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5001        }
5002
5003        if (drawCursor) {
5004            drawCursor(canvas, cursorOffsetVertical);
5005            // Rely on the drawable entirely, do not draw the cursor line.
5006            // Has to be done after the IMM related code above which relies on the highlight.
5007            highlight = null;
5008        }
5009
5010        if (canHaveDisplayList() && canvas.isHardwareAccelerated()) {
5011            final int width = mRight - mLeft;
5012            final int height = mBottom - mTop;
5013
5014            if (mTextDisplayList == null || !mTextDisplayList.isValid() ||
5015                    !mTextDisplayListIsValid) {
5016                if (mTextDisplayList == null) {
5017                    mTextDisplayList = getHardwareRenderer().createDisplayList("Text");
5018                }
5019
5020                final HardwareCanvas hardwareCanvas = mTextDisplayList.start();
5021                try {
5022                    hardwareCanvas.setViewport(width, height);
5023                    // The dirty rect should always be null for a display list
5024                    hardwareCanvas.onPreDraw(null);
5025                    layout.draw(hardwareCanvas, highlight, mHighlightPaint, cursorOffsetVertical);
5026                } finally {
5027                    hardwareCanvas.onPostDraw();
5028                    mTextDisplayList.end();
5029                    mTextDisplayListIsValid = true;
5030                }
5031            }
5032            ((HardwareCanvas) canvas).drawDisplayList(mTextDisplayList,
5033                    mScrollX + width, mScrollY + height, null);
5034        } else {
5035            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5036        }
5037
5038        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5039            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5040            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5041        }
5042
5043        canvas.restore();
5044    }
5045
5046    private void updateCursorsPositions() {
5047        if (mCursorDrawableRes == 0) {
5048            mCursorCount = 0;
5049            return;
5050        }
5051
5052        final int offset = getSelectionStart();
5053        final int line = mLayout.getLineForOffset(offset);
5054        final int top = mLayout.getLineTop(line);
5055        final int bottom = mLayout.getLineTop(line + 1);
5056
5057        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5058
5059        int middle = bottom;
5060        if (mCursorCount == 2) {
5061            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5062            middle = (top + bottom) >> 1;
5063        }
5064
5065        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5066
5067        if (mCursorCount == 2) {
5068            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5069        }
5070    }
5071
5072    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5073        if (mCursorDrawable[cursorIndex] == null)
5074            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5075
5076        if (mTempRect == null) mTempRect = new Rect();
5077
5078        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5079        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5080        horizontal = Math.max(0.5f, horizontal - 0.5f);
5081        final int left = (int) (horizontal) - mTempRect.left;
5082        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5083                bottom + mTempRect.bottom);
5084    }
5085
5086    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5087        final boolean translate = cursorOffsetVertical != 0;
5088        if (translate) canvas.translate(0, cursorOffsetVertical);
5089        for (int i = 0; i < mCursorCount; i++) {
5090            mCursorDrawable[i].draw(canvas);
5091        }
5092        if (translate) canvas.translate(0, -cursorOffsetVertical);
5093    }
5094
5095    @Override
5096    public void getFocusedRect(Rect r) {
5097        if (mLayout == null) {
5098            super.getFocusedRect(r);
5099            return;
5100        }
5101
5102        int selEnd = getSelectionEnd();
5103        if (selEnd < 0) {
5104            super.getFocusedRect(r);
5105            return;
5106        }
5107
5108        int selStart = getSelectionStart();
5109        if (selStart < 0 || selStart >= selEnd) {
5110            int line = mLayout.getLineForOffset(selEnd);
5111            r.top = mLayout.getLineTop(line);
5112            r.bottom = mLayout.getLineBottom(line);
5113            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5114            r.right = r.left + 4;
5115        } else {
5116            int lineStart = mLayout.getLineForOffset(selStart);
5117            int lineEnd = mLayout.getLineForOffset(selEnd);
5118            r.top = mLayout.getLineTop(lineStart);
5119            r.bottom = mLayout.getLineBottom(lineEnd);
5120            if (lineStart == lineEnd) {
5121                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5122                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5123            } else {
5124                // Selection extends across multiple lines -- the focused
5125                // rect covers the entire width.
5126                if (mHighlightPath == null) mHighlightPath = new Path();
5127                if (mHighlightPathBogus) {
5128                    mHighlightPath.reset();
5129                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5130                    mHighlightPathBogus = false;
5131                }
5132                synchronized (sTempRect) {
5133                    mHighlightPath.computeBounds(sTempRect, true);
5134                    r.left = (int)sTempRect.left-1;
5135                    r.right = (int)sTempRect.right+1;
5136                }
5137            }
5138        }
5139
5140        // Adjust for padding and gravity.
5141        int paddingLeft = getCompoundPaddingLeft();
5142        int paddingTop = getExtendedPaddingTop();
5143        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5144            paddingTop += getVerticalOffset(false);
5145        }
5146        r.offset(paddingLeft, paddingTop);
5147    }
5148
5149    /**
5150     * Return the number of lines of text, or 0 if the internal Layout has not
5151     * been built.
5152     */
5153    public int getLineCount() {
5154        return mLayout != null ? mLayout.getLineCount() : 0;
5155    }
5156
5157    /**
5158     * Return the baseline for the specified line (0...getLineCount() - 1)
5159     * If bounds is not null, return the top, left, right, bottom extents
5160     * of the specified line in it. If the internal Layout has not been built,
5161     * return 0 and set bounds to (0, 0, 0, 0)
5162     * @param line which line to examine (0..getLineCount() - 1)
5163     * @param bounds Optional. If not null, it returns the extent of the line
5164     * @return the Y-coordinate of the baseline
5165     */
5166    public int getLineBounds(int line, Rect bounds) {
5167        if (mLayout == null) {
5168            if (bounds != null) {
5169                bounds.set(0, 0, 0, 0);
5170            }
5171            return 0;
5172        }
5173        else {
5174            int baseline = mLayout.getLineBounds(line, bounds);
5175
5176            int voffset = getExtendedPaddingTop();
5177            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5178                voffset += getVerticalOffset(true);
5179            }
5180            if (bounds != null) {
5181                bounds.offset(getCompoundPaddingLeft(), voffset);
5182            }
5183            return baseline + voffset;
5184        }
5185    }
5186
5187    @Override
5188    public int getBaseline() {
5189        if (mLayout == null) {
5190            return super.getBaseline();
5191        }
5192
5193        int voffset = 0;
5194        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5195            voffset = getVerticalOffset(true);
5196        }
5197
5198        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5199    }
5200
5201    /**
5202     * @hide
5203     * @param offsetRequired
5204     */
5205    @Override
5206    protected int getFadeTop(boolean offsetRequired) {
5207        if (mLayout == null) return 0;
5208
5209        int voffset = 0;
5210        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5211            voffset = getVerticalOffset(true);
5212        }
5213
5214        if (offsetRequired) voffset += getTopPaddingOffset();
5215
5216        return getExtendedPaddingTop() + voffset;
5217    }
5218
5219    /**
5220     * @hide
5221     * @param offsetRequired
5222     */
5223    @Override
5224    protected int getFadeHeight(boolean offsetRequired) {
5225        return mLayout != null ? mLayout.getHeight() : 0;
5226    }
5227
5228    @Override
5229    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5230        if (keyCode == KeyEvent.KEYCODE_BACK) {
5231            boolean isInSelectionMode = mSelectionActionMode != null;
5232
5233            if (isInSelectionMode) {
5234                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5235                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5236                    if (state != null) {
5237                        state.startTracking(event, this);
5238                    }
5239                    return true;
5240                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5241                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5242                    if (state != null) {
5243                        state.handleUpEvent(event);
5244                    }
5245                    if (event.isTracking() && !event.isCanceled()) {
5246                        stopSelectionActionMode();
5247                        return true;
5248                    }
5249                }
5250            }
5251        }
5252        return super.onKeyPreIme(keyCode, event);
5253    }
5254
5255    @Override
5256    public boolean onKeyDown(int keyCode, KeyEvent event) {
5257        int which = doKeyDown(keyCode, event, null);
5258        if (which == 0) {
5259            // Go through default dispatching.
5260            return super.onKeyDown(keyCode, event);
5261        }
5262
5263        return true;
5264    }
5265
5266    @Override
5267    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5268        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5269
5270        int which = doKeyDown(keyCode, down, event);
5271        if (which == 0) {
5272            // Go through default dispatching.
5273            return super.onKeyMultiple(keyCode, repeatCount, event);
5274        }
5275        if (which == -1) {
5276            // Consumed the whole thing.
5277            return true;
5278        }
5279
5280        repeatCount--;
5281
5282        // We are going to dispatch the remaining events to either the input
5283        // or movement method.  To do this, we will just send a repeated stream
5284        // of down and up events until we have done the complete repeatCount.
5285        // It would be nice if those interfaces had an onKeyMultiple() method,
5286        // but adding that is a more complicated change.
5287        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5288        if (which == 1) {
5289            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5290            while (--repeatCount > 0) {
5291                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5292                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5293            }
5294            hideErrorIfUnchanged();
5295
5296        } else if (which == 2) {
5297            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5298            while (--repeatCount > 0) {
5299                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5300                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5301            }
5302        }
5303
5304        return true;
5305    }
5306
5307    /**
5308     * Returns true if pressing ENTER in this field advances focus instead
5309     * of inserting the character.  This is true mostly in single-line fields,
5310     * but also in mail addresses and subjects which will display on multiple
5311     * lines but where it doesn't make sense to insert newlines.
5312     */
5313    private boolean shouldAdvanceFocusOnEnter() {
5314        if (mInput == null) {
5315            return false;
5316        }
5317
5318        if (mSingleLine) {
5319            return true;
5320        }
5321
5322        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5323            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5324            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5325                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5326                return true;
5327            }
5328        }
5329
5330        return false;
5331    }
5332
5333    /**
5334     * Returns true if pressing TAB in this field advances focus instead
5335     * of inserting the character.  Insert tabs only in multi-line editors.
5336     */
5337    private boolean shouldAdvanceFocusOnTab() {
5338        if (mInput != null && !mSingleLine) {
5339            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5340                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5341                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5342                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5343                    return false;
5344                }
5345            }
5346        }
5347        return true;
5348    }
5349
5350    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5351        if (!isEnabled()) {
5352            return 0;
5353        }
5354
5355        switch (keyCode) {
5356            case KeyEvent.KEYCODE_ENTER:
5357                if (event.hasNoModifiers()) {
5358                    // When mInputContentType is set, we know that we are
5359                    // running in a "modern" cupcake environment, so don't need
5360                    // to worry about the application trying to capture
5361                    // enter key events.
5362                    if (mInputContentType != null) {
5363                        // If there is an action listener, given them a
5364                        // chance to consume the event.
5365                        if (mInputContentType.onEditorActionListener != null &&
5366                                mInputContentType.onEditorActionListener.onEditorAction(
5367                                this, EditorInfo.IME_NULL, event)) {
5368                            mInputContentType.enterDown = true;
5369                            // We are consuming the enter key for them.
5370                            return -1;
5371                        }
5372                    }
5373
5374                    // If our editor should move focus when enter is pressed, or
5375                    // this is a generated event from an IME action button, then
5376                    // don't let it be inserted into the text.
5377                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5378                            || shouldAdvanceFocusOnEnter()) {
5379                        if (hasOnClickListeners()) {
5380                            return 0;
5381                        }
5382                        return -1;
5383                    }
5384                }
5385                break;
5386
5387            case KeyEvent.KEYCODE_DPAD_CENTER:
5388                if (event.hasNoModifiers()) {
5389                    if (shouldAdvanceFocusOnEnter()) {
5390                        return 0;
5391                    }
5392                }
5393                break;
5394
5395            case KeyEvent.KEYCODE_TAB:
5396                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5397                    if (shouldAdvanceFocusOnTab()) {
5398                        return 0;
5399                    }
5400                }
5401                break;
5402
5403                // Has to be done on key down (and not on key up) to correctly be intercepted.
5404            case KeyEvent.KEYCODE_BACK:
5405                if (mSelectionActionMode != null) {
5406                    stopSelectionActionMode();
5407                    return -1;
5408                }
5409                break;
5410        }
5411
5412        if (mInput != null) {
5413            resetErrorChangedFlag();
5414
5415            boolean doDown = true;
5416            if (otherEvent != null) {
5417                try {
5418                    beginBatchEdit();
5419                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5420                    hideErrorIfUnchanged();
5421                    doDown = false;
5422                    if (handled) {
5423                        return -1;
5424                    }
5425                } catch (AbstractMethodError e) {
5426                    // onKeyOther was added after 1.0, so if it isn't
5427                    // implemented we need to try to dispatch as a regular down.
5428                } finally {
5429                    endBatchEdit();
5430                }
5431            }
5432
5433            if (doDown) {
5434                beginBatchEdit();
5435                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5436                endBatchEdit();
5437                hideErrorIfUnchanged();
5438                if (handled) return 1;
5439            }
5440        }
5441
5442        // bug 650865: sometimes we get a key event before a layout.
5443        // don't try to move around if we don't know the layout.
5444
5445        if (mMovement != null && mLayout != null) {
5446            boolean doDown = true;
5447            if (otherEvent != null) {
5448                try {
5449                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5450                            otherEvent);
5451                    doDown = false;
5452                    if (handled) {
5453                        return -1;
5454                    }
5455                } catch (AbstractMethodError e) {
5456                    // onKeyOther was added after 1.0, so if it isn't
5457                    // implemented we need to try to dispatch as a regular down.
5458                }
5459            }
5460            if (doDown) {
5461                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5462                    return 2;
5463            }
5464        }
5465
5466        return 0;
5467    }
5468
5469    /**
5470     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5471     * can be recorded.
5472     * @hide
5473     */
5474    public void resetErrorChangedFlag() {
5475        /*
5476         * Keep track of what the error was before doing the input
5477         * so that if an input filter changed the error, we leave
5478         * that error showing.  Otherwise, we take down whatever
5479         * error was showing when the user types something.
5480         */
5481        mErrorWasChanged = false;
5482    }
5483
5484    /**
5485     * @hide
5486     */
5487    public void hideErrorIfUnchanged() {
5488        if (mError != null && !mErrorWasChanged) {
5489            setError(null, null);
5490        }
5491    }
5492
5493    @Override
5494    public boolean onKeyUp(int keyCode, KeyEvent event) {
5495        if (!isEnabled()) {
5496            return super.onKeyUp(keyCode, event);
5497        }
5498
5499        switch (keyCode) {
5500            case KeyEvent.KEYCODE_DPAD_CENTER:
5501                if (event.hasNoModifiers()) {
5502                    /*
5503                     * If there is a click listener, just call through to
5504                     * super, which will invoke it.
5505                     *
5506                     * If there isn't a click listener, try to show the soft
5507                     * input method.  (It will also
5508                     * call performClick(), but that won't do anything in
5509                     * this case.)
5510                     */
5511                    if (!hasOnClickListeners()) {
5512                        if (mMovement != null && mText instanceof Editable
5513                                && mLayout != null && onCheckIsTextEditor()) {
5514                            InputMethodManager imm = InputMethodManager.peekInstance();
5515                            viewClicked(imm);
5516                            if (imm != null) {
5517                                imm.showSoftInput(this, 0);
5518                            }
5519                        }
5520                    }
5521                }
5522                return super.onKeyUp(keyCode, event);
5523
5524            case KeyEvent.KEYCODE_ENTER:
5525                if (event.hasNoModifiers()) {
5526                    if (mInputContentType != null
5527                            && mInputContentType.onEditorActionListener != null
5528                            && mInputContentType.enterDown) {
5529                        mInputContentType.enterDown = false;
5530                        if (mInputContentType.onEditorActionListener.onEditorAction(
5531                                this, EditorInfo.IME_NULL, event)) {
5532                            return true;
5533                        }
5534                    }
5535
5536                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5537                            || shouldAdvanceFocusOnEnter()) {
5538                        /*
5539                         * If there is a click listener, just call through to
5540                         * super, which will invoke it.
5541                         *
5542                         * If there isn't a click listener, try to advance focus,
5543                         * but still call through to super, which will reset the
5544                         * pressed state and longpress state.  (It will also
5545                         * call performClick(), but that won't do anything in
5546                         * this case.)
5547                         */
5548                        if (!hasOnClickListeners()) {
5549                            View v = focusSearch(FOCUS_DOWN);
5550
5551                            if (v != null) {
5552                                if (!v.requestFocus(FOCUS_DOWN)) {
5553                                    throw new IllegalStateException(
5554                                            "focus search returned a view " +
5555                                            "that wasn't able to take focus!");
5556                                }
5557
5558                                /*
5559                                 * Return true because we handled the key; super
5560                                 * will return false because there was no click
5561                                 * listener.
5562                                 */
5563                                super.onKeyUp(keyCode, event);
5564                                return true;
5565                            } else if ((event.getFlags()
5566                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5567                                // No target for next focus, but make sure the IME
5568                                // if this came from it.
5569                                InputMethodManager imm = InputMethodManager.peekInstance();
5570                                if (imm != null && imm.isActive(this)) {
5571                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5572                                }
5573                            }
5574                        }
5575                    }
5576                    return super.onKeyUp(keyCode, event);
5577                }
5578                break;
5579        }
5580
5581        if (mInput != null)
5582            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5583                return true;
5584
5585        if (mMovement != null && mLayout != null)
5586            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5587                return true;
5588
5589        return super.onKeyUp(keyCode, event);
5590    }
5591
5592    @Override
5593    public boolean onCheckIsTextEditor() {
5594        return mInputType != EditorInfo.TYPE_NULL;
5595    }
5596
5597    @Override
5598    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5599        if (onCheckIsTextEditor() && isEnabled()) {
5600            if (mInputMethodState == null) {
5601                mInputMethodState = new InputMethodState();
5602            }
5603            outAttrs.inputType = mInputType;
5604            if (mInputContentType != null) {
5605                outAttrs.imeOptions = mInputContentType.imeOptions;
5606                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5607                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5608                outAttrs.actionId = mInputContentType.imeActionId;
5609                outAttrs.extras = mInputContentType.extras;
5610            } else {
5611                outAttrs.imeOptions = EditorInfo.IME_NULL;
5612            }
5613            if (focusSearch(FOCUS_DOWN) != null) {
5614                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5615            }
5616            if (focusSearch(FOCUS_UP) != null) {
5617                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5618            }
5619            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5620                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5621                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5622                    // An action has not been set, but the enter key will move to
5623                    // the next focus, so set the action to that.
5624                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5625                } else {
5626                    // An action has not been set, and there is no focus to move
5627                    // to, so let's just supply a "done" action.
5628                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5629                }
5630                if (!shouldAdvanceFocusOnEnter()) {
5631                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5632                }
5633            }
5634            if (isMultilineInputType(outAttrs.inputType)) {
5635                // Multi-line text editors should always show an enter key.
5636                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5637            }
5638            outAttrs.hintText = mHint;
5639            if (mText instanceof Editable) {
5640                InputConnection ic = new EditableInputConnection(this);
5641                outAttrs.initialSelStart = getSelectionStart();
5642                outAttrs.initialSelEnd = getSelectionEnd();
5643                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5644                return ic;
5645            }
5646        }
5647        return null;
5648    }
5649
5650    /**
5651     * If this TextView contains editable content, extract a portion of it
5652     * based on the information in <var>request</var> in to <var>outText</var>.
5653     * @return Returns true if the text was successfully extracted, else false.
5654     */
5655    public boolean extractText(ExtractedTextRequest request,
5656            ExtractedText outText) {
5657        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5658                EXTRACT_UNKNOWN, outText);
5659    }
5660
5661    static final int EXTRACT_NOTHING = -2;
5662    static final int EXTRACT_UNKNOWN = -1;
5663
5664    boolean extractTextInternal(ExtractedTextRequest request,
5665            int partialStartOffset, int partialEndOffset, int delta,
5666            ExtractedText outText) {
5667        final CharSequence content = mText;
5668        if (content != null) {
5669            if (partialStartOffset != EXTRACT_NOTHING) {
5670                final int N = content.length();
5671                if (partialStartOffset < 0) {
5672                    outText.partialStartOffset = outText.partialEndOffset = -1;
5673                    partialStartOffset = 0;
5674                    partialEndOffset = N;
5675                } else {
5676                    // Now use the delta to determine the actual amount of text
5677                    // we need.
5678                    partialEndOffset += delta;
5679                    // Adjust offsets to ensure we contain full spans.
5680                    if (content instanceof Spanned) {
5681                        Spanned spanned = (Spanned)content;
5682                        Object[] spans = spanned.getSpans(partialStartOffset,
5683                                partialEndOffset, ParcelableSpan.class);
5684                        int i = spans.length;
5685                        while (i > 0) {
5686                            i--;
5687                            int j = spanned.getSpanStart(spans[i]);
5688                            if (j < partialStartOffset) partialStartOffset = j;
5689                            j = spanned.getSpanEnd(spans[i]);
5690                            if (j > partialEndOffset) partialEndOffset = j;
5691                        }
5692                    }
5693                    outText.partialStartOffset = partialStartOffset;
5694                    outText.partialEndOffset = partialEndOffset - delta;
5695
5696                    if (partialStartOffset > N) {
5697                        partialStartOffset = N;
5698                    } else if (partialStartOffset < 0) {
5699                        partialStartOffset = 0;
5700                    }
5701                    if (partialEndOffset > N) {
5702                        partialEndOffset = N;
5703                    } else if (partialEndOffset < 0) {
5704                        partialEndOffset = 0;
5705                    }
5706                }
5707                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5708                    outText.text = content.subSequence(partialStartOffset,
5709                            partialEndOffset);
5710                } else {
5711                    outText.text = TextUtils.substring(content, partialStartOffset,
5712                            partialEndOffset);
5713                }
5714            } else {
5715                outText.partialStartOffset = 0;
5716                outText.partialEndOffset = 0;
5717                outText.text = "";
5718            }
5719            outText.flags = 0;
5720            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5721                outText.flags |= ExtractedText.FLAG_SELECTING;
5722            }
5723            if (mSingleLine) {
5724                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5725            }
5726            outText.startOffset = 0;
5727            outText.selectionStart = getSelectionStart();
5728            outText.selectionEnd = getSelectionEnd();
5729            return true;
5730        }
5731        return false;
5732    }
5733
5734    boolean reportExtractedText() {
5735        final InputMethodState ims = mInputMethodState;
5736        if (ims != null) {
5737            final boolean contentChanged = ims.mContentChanged;
5738            if (contentChanged || ims.mSelectionModeChanged) {
5739                ims.mContentChanged = false;
5740                ims.mSelectionModeChanged = false;
5741                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5742                if (req != null) {
5743                    InputMethodManager imm = InputMethodManager.peekInstance();
5744                    if (imm != null) {
5745                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5746                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5747                                + " delta=" + ims.mChangedDelta);
5748                        if (ims.mChangedStart < 0 && !contentChanged) {
5749                            ims.mChangedStart = EXTRACT_NOTHING;
5750                        }
5751                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5752                                ims.mChangedDelta, ims.mTmpExtracted)) {
5753                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5754                                    + ims.mTmpExtracted.partialStartOffset
5755                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5756                                    + ": " + ims.mTmpExtracted.text);
5757                            imm.updateExtractedText(this, req.token,
5758                                    mInputMethodState.mTmpExtracted);
5759                            ims.mChangedStart = EXTRACT_UNKNOWN;
5760                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5761                            ims.mChangedDelta = 0;
5762                            ims.mContentChanged = false;
5763                            return true;
5764                        }
5765                    }
5766                }
5767            }
5768        }
5769        return false;
5770    }
5771
5772    /**
5773     * This is used to remove all style-impacting spans from text before new
5774     * extracted text is being replaced into it, so that we don't have any
5775     * lingering spans applied during the replace.
5776     */
5777    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5778        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5779        int i = spans.length;
5780        while (i > 0) {
5781            i--;
5782            spannable.removeSpan(spans[i]);
5783        }
5784    }
5785
5786    /**
5787     * Apply to this text view the given extracted text, as previously
5788     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5789     */
5790    public void setExtractedText(ExtractedText text) {
5791        Editable content = getEditableText();
5792        if (text.text != null) {
5793            if (content == null) {
5794                setText(text.text, TextView.BufferType.EDITABLE);
5795            } else if (text.partialStartOffset < 0) {
5796                removeParcelableSpans(content, 0, content.length());
5797                content.replace(0, content.length(), text.text);
5798            } else {
5799                final int N = content.length();
5800                int start = text.partialStartOffset;
5801                if (start > N) start = N;
5802                int end = text.partialEndOffset;
5803                if (end > N) end = N;
5804                removeParcelableSpans(content, start, end);
5805                content.replace(start, end, text.text);
5806            }
5807        }
5808
5809        // Now set the selection position...  make sure it is in range, to
5810        // avoid crashes.  If this is a partial update, it is possible that
5811        // the underlying text may have changed, causing us problems here.
5812        // Also we just don't want to trust clients to do the right thing.
5813        Spannable sp = (Spannable)getText();
5814        final int N = sp.length();
5815        int start = text.selectionStart;
5816        if (start < 0) start = 0;
5817        else if (start > N) start = N;
5818        int end = text.selectionEnd;
5819        if (end < 0) end = 0;
5820        else if (end > N) end = N;
5821        Selection.setSelection(sp, start, end);
5822
5823        // Finally, update the selection mode.
5824        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5825            MetaKeyKeyListener.startSelecting(this, sp);
5826        } else {
5827            MetaKeyKeyListener.stopSelecting(this, sp);
5828        }
5829    }
5830
5831    /**
5832     * @hide
5833     */
5834    public void setExtracting(ExtractedTextRequest req) {
5835        if (mInputMethodState != null) {
5836            mInputMethodState.mExtracting = req;
5837        }
5838        // This would stop a possible selection mode, but no such mode is started in case
5839        // extracted mode will start. Some text is selected though, and will trigger an action mode
5840        // in the extracted view.
5841        hideControllers();
5842    }
5843
5844    /**
5845     * Called by the framework in response to a text completion from
5846     * the current input method, provided by it calling
5847     * {@link InputConnection#commitCompletion
5848     * InputConnection.commitCompletion()}.  The default implementation does
5849     * nothing; text views that are supporting auto-completion should override
5850     * this to do their desired behavior.
5851     *
5852     * @param text The auto complete text the user has selected.
5853     */
5854    public void onCommitCompletion(CompletionInfo text) {
5855        // intentionally empty
5856    }
5857
5858    /**
5859     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5860     * a dictionnary) from the current input method, provided by it calling
5861     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5862     * implementation flashes the background of the corrected word to provide feedback to the user.
5863     *
5864     * @param info The auto correct info about the text that was corrected.
5865     */
5866    public void onCommitCorrection(CorrectionInfo info) {
5867        if (mCorrectionHighlighter == null) {
5868            mCorrectionHighlighter = new CorrectionHighlighter();
5869        } else {
5870            mCorrectionHighlighter.invalidate(false);
5871        }
5872
5873        mCorrectionHighlighter.highlight(info);
5874    }
5875
5876    private class CorrectionHighlighter {
5877        private final Path mPath = new Path();
5878        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5879        private int mStart, mEnd;
5880        private long mFadingStartTime;
5881        private final static int FADE_OUT_DURATION = 400;
5882
5883        public CorrectionHighlighter() {
5884            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5885            mPaint.setStyle(Paint.Style.FILL);
5886        }
5887
5888        public void highlight(CorrectionInfo info) {
5889            mStart = info.getOffset();
5890            mEnd = mStart + info.getNewText().length();
5891            mFadingStartTime = SystemClock.uptimeMillis();
5892
5893            if (mStart < 0 || mEnd < 0) {
5894                stopAnimation();
5895            }
5896        }
5897
5898        public void draw(Canvas canvas, int cursorOffsetVertical) {
5899            if (updatePath() && updatePaint()) {
5900                if (cursorOffsetVertical != 0) {
5901                    canvas.translate(0, cursorOffsetVertical);
5902                }
5903
5904                canvas.drawPath(mPath, mPaint);
5905
5906                if (cursorOffsetVertical != 0) {
5907                    canvas.translate(0, -cursorOffsetVertical);
5908                }
5909                invalidate(true); // TODO invalidate cursor region only
5910            } else {
5911                stopAnimation();
5912                invalidate(false); // TODO invalidate cursor region only
5913            }
5914        }
5915
5916        private boolean updatePaint() {
5917            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5918            if (duration > FADE_OUT_DURATION) return false;
5919
5920            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5921            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5922            final int color = (mHighlightColor & 0x00FFFFFF) +
5923                    ((int) (highlightColorAlpha * coef) << 24);
5924            mPaint.setColor(color);
5925            return true;
5926        }
5927
5928        private boolean updatePath() {
5929            final Layout layout = TextView.this.mLayout;
5930            if (layout == null) return false;
5931
5932            // Update in case text is edited while the animation is run
5933            final int length = mText.length();
5934            int start = Math.min(length, mStart);
5935            int end = Math.min(length, mEnd);
5936
5937            mPath.reset();
5938            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5939            return true;
5940        }
5941
5942        private void invalidate(boolean delayed) {
5943            if (TextView.this.mLayout == null) return;
5944
5945            synchronized (sTempRect) {
5946                mPath.computeBounds(sTempRect, false);
5947
5948                int left = getCompoundPaddingLeft();
5949                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5950
5951                if (delayed) {
5952                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5953                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5954                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5955                } else {
5956                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5957                            (int) sTempRect.right, (int) sTempRect.bottom);
5958                }
5959            }
5960        }
5961
5962        private void stopAnimation() {
5963            TextView.this.mCorrectionHighlighter = null;
5964        }
5965    }
5966
5967    public void beginBatchEdit() {
5968        mInBatchEditControllers = true;
5969        final InputMethodState ims = mInputMethodState;
5970        if (ims != null) {
5971            int nesting = ++ims.mBatchEditNesting;
5972            if (nesting == 1) {
5973                ims.mCursorChanged = false;
5974                ims.mChangedDelta = 0;
5975                if (ims.mContentChanged) {
5976                    // We already have a pending change from somewhere else,
5977                    // so turn this into a full update.
5978                    ims.mChangedStart = 0;
5979                    ims.mChangedEnd = mText.length();
5980                } else {
5981                    ims.mChangedStart = EXTRACT_UNKNOWN;
5982                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5983                    ims.mContentChanged = false;
5984                }
5985                onBeginBatchEdit();
5986            }
5987        }
5988    }
5989
5990    public void endBatchEdit() {
5991        mInBatchEditControllers = false;
5992        final InputMethodState ims = mInputMethodState;
5993        if (ims != null) {
5994            int nesting = --ims.mBatchEditNesting;
5995            if (nesting == 0) {
5996                finishBatchEdit(ims);
5997            }
5998        }
5999    }
6000
6001    void ensureEndedBatchEdit() {
6002        final InputMethodState ims = mInputMethodState;
6003        if (ims != null && ims.mBatchEditNesting != 0) {
6004            ims.mBatchEditNesting = 0;
6005            finishBatchEdit(ims);
6006        }
6007    }
6008
6009    void finishBatchEdit(final InputMethodState ims) {
6010        onEndBatchEdit();
6011
6012        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6013            updateAfterEdit();
6014            reportExtractedText();
6015        } else if (ims.mCursorChanged) {
6016            // Cheezy way to get us to report the current cursor location.
6017            invalidateCursor();
6018        }
6019    }
6020
6021    void updateAfterEdit() {
6022        invalidate();
6023        int curs = getSelectionStart();
6024
6025        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6026            registerForPreDraw();
6027        }
6028
6029        if (curs >= 0) {
6030            mHighlightPathBogus = true;
6031            makeBlink();
6032            bringPointIntoView(curs);
6033        }
6034
6035        checkForResize();
6036    }
6037
6038    /**
6039     * Called by the framework in response to a request to begin a batch
6040     * of edit operations through a call to link {@link #beginBatchEdit()}.
6041     */
6042    public void onBeginBatchEdit() {
6043        // intentionally empty
6044    }
6045
6046    /**
6047     * Called by the framework in response to a request to end a batch
6048     * of edit operations through a call to link {@link #endBatchEdit}.
6049     */
6050    public void onEndBatchEdit() {
6051        // intentionally empty
6052    }
6053
6054    /**
6055     * Called by the framework in response to a private command from the
6056     * current method, provided by it calling
6057     * {@link InputConnection#performPrivateCommand
6058     * InputConnection.performPrivateCommand()}.
6059     *
6060     * @param action The action name of the command.
6061     * @param data Any additional data for the command.  This may be null.
6062     * @return Return true if you handled the command, else false.
6063     */
6064    public boolean onPrivateIMECommand(String action, Bundle data) {
6065        return false;
6066    }
6067
6068    private void nullLayouts() {
6069        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6070            mSavedLayout = (BoringLayout) mLayout;
6071        }
6072        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6073            mSavedHintLayout = (BoringLayout) mHintLayout;
6074        }
6075
6076        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6077
6078        mBoring = mHintBoring = null;
6079
6080        // Since it depends on the value of mLayout
6081        prepareCursorControllers();
6082    }
6083
6084    /**
6085     * Make a new Layout based on the already-measured size of the view,
6086     * on the assumption that it was measured correctly at some point.
6087     */
6088    private void assumeLayout() {
6089        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6090
6091        if (width < 1) {
6092            width = 0;
6093        }
6094
6095        int physicalWidth = width;
6096
6097        if (mHorizontallyScrolling) {
6098            width = VERY_WIDE;
6099        }
6100
6101        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6102                      physicalWidth, false);
6103    }
6104
6105    @Override
6106    protected void resetResolvedLayoutDirection() {
6107        super.resetResolvedLayoutDirection();
6108
6109        if (mLayoutAlignment != null &&
6110                (mTextAlign == TextAlign.VIEW_START ||
6111                mTextAlign == TextAlign.VIEW_END)) {
6112            mLayoutAlignment = null;
6113        }
6114    }
6115
6116    private Layout.Alignment getLayoutAlignment() {
6117        if (mLayoutAlignment == null) {
6118            Layout.Alignment alignment;
6119            TextAlign textAlign = mTextAlign;
6120            switch (textAlign) {
6121                case INHERIT:
6122                    // fall through to gravity temporarily
6123                    // intention is to inherit value through view hierarchy.
6124                case GRAVITY:
6125                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6126                        case Gravity.START:
6127                            alignment = Layout.Alignment.ALIGN_NORMAL;
6128                            break;
6129                        case Gravity.END:
6130                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6131                            break;
6132                        case Gravity.LEFT:
6133                            alignment = Layout.Alignment.ALIGN_LEFT;
6134                            break;
6135                        case Gravity.RIGHT:
6136                            alignment = Layout.Alignment.ALIGN_RIGHT;
6137                            break;
6138                        case Gravity.CENTER_HORIZONTAL:
6139                            alignment = Layout.Alignment.ALIGN_CENTER;
6140                            break;
6141                        default:
6142                            alignment = Layout.Alignment.ALIGN_NORMAL;
6143                            break;
6144                    }
6145                    break;
6146                case TEXT_START:
6147                    alignment = Layout.Alignment.ALIGN_NORMAL;
6148                    break;
6149                case TEXT_END:
6150                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6151                    break;
6152                case CENTER:
6153                    alignment = Layout.Alignment.ALIGN_CENTER;
6154                    break;
6155                case VIEW_START:
6156                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6157                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6158                    break;
6159                case VIEW_END:
6160                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6161                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6162                    break;
6163                default:
6164                    alignment = Layout.Alignment.ALIGN_NORMAL;
6165                    break;
6166            }
6167            mLayoutAlignment = alignment;
6168        }
6169        return mLayoutAlignment;
6170    }
6171
6172    /**
6173     * The width passed in is now the desired layout width,
6174     * not the full view width with padding.
6175     * {@hide}
6176     */
6177    protected void makeNewLayout(int wantWidth, int hintWidth,
6178                                 BoringLayout.Metrics boring,
6179                                 BoringLayout.Metrics hintBoring,
6180                                 int ellipsisWidth, boolean bringIntoView) {
6181        stopMarquee();
6182
6183        // Update "old" cached values
6184        mOldMaximum = mMaximum;
6185        mOldMaxMode = mMaxMode;
6186
6187        mHighlightPathBogus = true;
6188
6189        if (wantWidth < 0) {
6190            wantWidth = 0;
6191        }
6192        if (hintWidth < 0) {
6193            hintWidth = 0;
6194        }
6195
6196        Layout.Alignment alignment = getLayoutAlignment();
6197        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6198        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6199                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6200        TruncateAt effectiveEllipsize = mEllipsize;
6201        if (mEllipsize == TruncateAt.MARQUEE &&
6202                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6203            effectiveEllipsize = TruncateAt.END_SMALL;
6204        }
6205
6206        if (mTextDir == null) {
6207            resolveTextDirection();
6208        }
6209
6210        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6211                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6212        if (switchEllipsize) {
6213            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6214                    TruncateAt.END : TruncateAt.MARQUEE;
6215            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6216                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6217        }
6218
6219        shouldEllipsize = mEllipsize != null;
6220        mHintLayout = null;
6221
6222        if (mHint != null) {
6223            if (shouldEllipsize) hintWidth = wantWidth;
6224
6225            if (hintBoring == UNKNOWN_BORING) {
6226                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6227                                                   mHintBoring);
6228                if (hintBoring != null) {
6229                    mHintBoring = hintBoring;
6230                }
6231            }
6232
6233            if (hintBoring != null) {
6234                if (hintBoring.width <= hintWidth &&
6235                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6236                    if (mSavedHintLayout != null) {
6237                        mHintLayout = mSavedHintLayout.
6238                                replaceOrMake(mHint, mTextPaint,
6239                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6240                                hintBoring, mIncludePad);
6241                    } else {
6242                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6243                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6244                                hintBoring, mIncludePad);
6245                    }
6246
6247                    mSavedHintLayout = (BoringLayout) mHintLayout;
6248                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6249                    if (mSavedHintLayout != null) {
6250                        mHintLayout = mSavedHintLayout.
6251                                replaceOrMake(mHint, mTextPaint,
6252                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6253                                hintBoring, mIncludePad, mEllipsize,
6254                                ellipsisWidth);
6255                    } else {
6256                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6257                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6258                                hintBoring, mIncludePad, mEllipsize,
6259                                ellipsisWidth);
6260                    }
6261                } else if (shouldEllipsize) {
6262                    mHintLayout = new StaticLayout(mHint,
6263                                0, mHint.length(),
6264                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6265                                mSpacingAdd, mIncludePad, mEllipsize,
6266                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6267                } else {
6268                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6269                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6270                            mIncludePad);
6271                }
6272            } else if (shouldEllipsize) {
6273                mHintLayout = new StaticLayout(mHint,
6274                            0, mHint.length(),
6275                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6276                            mSpacingAdd, mIncludePad, mEllipsize,
6277                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6278            } else {
6279                mHintLayout = new StaticLayout(mHint, mTextPaint,
6280                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6281                        mIncludePad);
6282            }
6283        }
6284
6285        if (bringIntoView) {
6286            registerForPreDraw();
6287        }
6288
6289        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6290            if (!compressText(ellipsisWidth)) {
6291                final int height = mLayoutParams.height;
6292                // If the size of the view does not depend on the size of the text, try to
6293                // start the marquee immediately
6294                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6295                    startMarquee();
6296                } else {
6297                    // Defer the start of the marquee until we know our width (see setFrame())
6298                    mRestartMarquee = true;
6299                }
6300            }
6301        }
6302
6303        // CursorControllers need a non-null mLayout
6304        prepareCursorControllers();
6305    }
6306
6307    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6308            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6309            boolean useSaved) {
6310        Layout result = null;
6311        if (mText instanceof Spannable) {
6312            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6313                    alignment, mTextDir, mSpacingMult,
6314                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6315                            ellipsisWidth);
6316        } else {
6317            if (boring == UNKNOWN_BORING) {
6318                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6319                if (boring != null) {
6320                    mBoring = boring;
6321                }
6322            }
6323
6324            if (boring != null) {
6325                if (boring.width <= wantWidth &&
6326                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6327                    if (useSaved && mSavedLayout != null) {
6328                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6329                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6330                                boring, mIncludePad);
6331                    } else {
6332                        result = BoringLayout.make(mTransformed, mTextPaint,
6333                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6334                                boring, mIncludePad);
6335                    }
6336
6337                    if (useSaved) {
6338                        mSavedLayout = (BoringLayout) result;
6339                    }
6340                } else if (shouldEllipsize && boring.width <= wantWidth) {
6341                    if (useSaved && mSavedLayout != null) {
6342                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6343                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6344                                boring, mIncludePad, effectiveEllipsize,
6345                                ellipsisWidth);
6346                    } else {
6347                        result = BoringLayout.make(mTransformed, mTextPaint,
6348                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6349                                boring, mIncludePad, effectiveEllipsize,
6350                                ellipsisWidth);
6351                    }
6352                } else if (shouldEllipsize) {
6353                    result = new StaticLayout(mTransformed,
6354                            0, mTransformed.length(),
6355                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6356                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6357                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6358                } else {
6359                    result = new StaticLayout(mTransformed, mTextPaint,
6360                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6361                            mIncludePad);
6362                }
6363            } else if (shouldEllipsize) {
6364                result = new StaticLayout(mTransformed,
6365                        0, mTransformed.length(),
6366                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6367                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6368                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6369            } else {
6370                result = new StaticLayout(mTransformed, mTextPaint,
6371                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6372                        mIncludePad);
6373            }
6374        }
6375        return result;
6376    }
6377
6378    private boolean compressText(float width) {
6379        if (isHardwareAccelerated()) return false;
6380
6381        // Only compress the text if it hasn't been compressed by the previous pass
6382        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6383                mTextPaint.getTextScaleX() == 1.0f) {
6384            final float textWidth = mLayout.getLineWidth(0);
6385            final float overflow = (textWidth + 1.0f - width) / width;
6386            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6387                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6388                post(new Runnable() {
6389                    public void run() {
6390                        requestLayout();
6391                    }
6392                });
6393                return true;
6394            }
6395        }
6396
6397        return false;
6398    }
6399
6400    private static int desired(Layout layout) {
6401        int n = layout.getLineCount();
6402        CharSequence text = layout.getText();
6403        float max = 0;
6404
6405        // if any line was wrapped, we can't use it.
6406        // but it's ok for the last line not to have a newline
6407
6408        for (int i = 0; i < n - 1; i++) {
6409            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6410                return -1;
6411        }
6412
6413        for (int i = 0; i < n; i++) {
6414            max = Math.max(max, layout.getLineWidth(i));
6415        }
6416
6417        return (int) FloatMath.ceil(max);
6418    }
6419
6420    /**
6421     * Set whether the TextView includes extra top and bottom padding to make
6422     * room for accents that go above the normal ascent and descent.
6423     * The default is true.
6424     *
6425     * @attr ref android.R.styleable#TextView_includeFontPadding
6426     */
6427    public void setIncludeFontPadding(boolean includepad) {
6428        if (mIncludePad != includepad) {
6429            mIncludePad = includepad;
6430
6431            if (mLayout != null) {
6432                nullLayouts();
6433                requestLayout();
6434                invalidate();
6435            }
6436        }
6437    }
6438
6439    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6440
6441    @Override
6442    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6443        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6444        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6445        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6446        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6447
6448        int width;
6449        int height;
6450
6451        BoringLayout.Metrics boring = UNKNOWN_BORING;
6452        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6453
6454        if (mTextDir == null) {
6455            resolveTextDirection();
6456        }
6457
6458        int des = -1;
6459        boolean fromexisting = false;
6460
6461        if (widthMode == MeasureSpec.EXACTLY) {
6462            // Parent has told us how big to be. So be it.
6463            width = widthSize;
6464        } else {
6465            if (mLayout != null && mEllipsize == null) {
6466                des = desired(mLayout);
6467            }
6468
6469            if (des < 0) {
6470                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6471                if (boring != null) {
6472                    mBoring = boring;
6473                }
6474            } else {
6475                fromexisting = true;
6476            }
6477
6478            if (boring == null || boring == UNKNOWN_BORING) {
6479                if (des < 0) {
6480                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6481                }
6482
6483                width = des;
6484            } else {
6485                width = boring.width;
6486            }
6487
6488            final Drawables dr = mDrawables;
6489            if (dr != null) {
6490                width = Math.max(width, dr.mDrawableWidthTop);
6491                width = Math.max(width, dr.mDrawableWidthBottom);
6492            }
6493
6494            if (mHint != null) {
6495                int hintDes = -1;
6496                int hintWidth;
6497
6498                if (mHintLayout != null && mEllipsize == null) {
6499                    hintDes = desired(mHintLayout);
6500                }
6501
6502                if (hintDes < 0) {
6503                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6504                    if (hintBoring != null) {
6505                        mHintBoring = hintBoring;
6506                    }
6507                }
6508
6509                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6510                    if (hintDes < 0) {
6511                        hintDes = (int) FloatMath.ceil(
6512                                Layout.getDesiredWidth(mHint, mTextPaint));
6513                    }
6514
6515                    hintWidth = hintDes;
6516                } else {
6517                    hintWidth = hintBoring.width;
6518                }
6519
6520                if (hintWidth > width) {
6521                    width = hintWidth;
6522                }
6523            }
6524
6525            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6526
6527            if (mMaxWidthMode == EMS) {
6528                width = Math.min(width, mMaxWidth * getLineHeight());
6529            } else {
6530                width = Math.min(width, mMaxWidth);
6531            }
6532
6533            if (mMinWidthMode == EMS) {
6534                width = Math.max(width, mMinWidth * getLineHeight());
6535            } else {
6536                width = Math.max(width, mMinWidth);
6537            }
6538
6539            // Check against our minimum width
6540            width = Math.max(width, getSuggestedMinimumWidth());
6541
6542            if (widthMode == MeasureSpec.AT_MOST) {
6543                width = Math.min(widthSize, width);
6544            }
6545        }
6546
6547        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6548        int unpaddedWidth = want;
6549
6550        if (mHorizontallyScrolling) want = VERY_WIDE;
6551
6552        int hintWant = want;
6553        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6554
6555        if (mLayout == null) {
6556            makeNewLayout(want, hintWant, boring, hintBoring,
6557                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6558        } else {
6559            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6560                    (hintWidth != hintWant) ||
6561                    (mLayout.getEllipsizedWidth() !=
6562                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6563
6564            final boolean widthChanged = (mHint == null) &&
6565                    (mEllipsize == null) &&
6566                    (want > mLayout.getWidth()) &&
6567                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6568
6569            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6570
6571            if (layoutChanged || maximumChanged) {
6572                if (!maximumChanged && widthChanged) {
6573                    mLayout.increaseWidthTo(want);
6574                } else {
6575                    makeNewLayout(want, hintWant, boring, hintBoring,
6576                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6577                }
6578            } else {
6579                // Nothing has changed
6580            }
6581        }
6582
6583        if (heightMode == MeasureSpec.EXACTLY) {
6584            // Parent has told us how big to be. So be it.
6585            height = heightSize;
6586            mDesiredHeightAtMeasure = -1;
6587        } else {
6588            int desired = getDesiredHeight();
6589
6590            height = desired;
6591            mDesiredHeightAtMeasure = desired;
6592
6593            if (heightMode == MeasureSpec.AT_MOST) {
6594                height = Math.min(desired, heightSize);
6595            }
6596        }
6597
6598        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6599        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6600            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6601        }
6602
6603        /*
6604         * We didn't let makeNewLayout() register to bring the cursor into view,
6605         * so do it here if there is any possibility that it is needed.
6606         */
6607        if (mMovement != null ||
6608            mLayout.getWidth() > unpaddedWidth ||
6609            mLayout.getHeight() > unpaddedHeight) {
6610            registerForPreDraw();
6611        } else {
6612            scrollTo(0, 0);
6613        }
6614
6615        setMeasuredDimension(width, height);
6616    }
6617
6618    private int getDesiredHeight() {
6619        return Math.max(
6620                getDesiredHeight(mLayout, true),
6621                getDesiredHeight(mHintLayout, mEllipsize != null));
6622    }
6623
6624    private int getDesiredHeight(Layout layout, boolean cap) {
6625        if (layout == null) {
6626            return 0;
6627        }
6628
6629        int linecount = layout.getLineCount();
6630        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6631        int desired = layout.getLineTop(linecount);
6632
6633        final Drawables dr = mDrawables;
6634        if (dr != null) {
6635            desired = Math.max(desired, dr.mDrawableHeightLeft);
6636            desired = Math.max(desired, dr.mDrawableHeightRight);
6637        }
6638
6639        desired += pad;
6640
6641        if (mMaxMode == LINES) {
6642            /*
6643             * Don't cap the hint to a certain number of lines.
6644             * (Do cap it, though, if we have a maximum pixel height.)
6645             */
6646            if (cap) {
6647                if (linecount > mMaximum) {
6648                    desired = layout.getLineTop(mMaximum);
6649
6650                    if (dr != null) {
6651                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6652                        desired = Math.max(desired, dr.mDrawableHeightRight);
6653                    }
6654
6655                    desired += pad;
6656                    linecount = mMaximum;
6657                }
6658            }
6659        } else {
6660            desired = Math.min(desired, mMaximum);
6661        }
6662
6663        if (mMinMode == LINES) {
6664            if (linecount < mMinimum) {
6665                desired += getLineHeight() * (mMinimum - linecount);
6666            }
6667        } else {
6668            desired = Math.max(desired, mMinimum);
6669        }
6670
6671        // Check against our minimum height
6672        desired = Math.max(desired, getSuggestedMinimumHeight());
6673
6674        return desired;
6675    }
6676
6677    /**
6678     * Check whether a change to the existing text layout requires a
6679     * new view layout.
6680     */
6681    private void checkForResize() {
6682        boolean sizeChanged = false;
6683
6684        if (mLayout != null) {
6685            // Check if our width changed
6686            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6687                sizeChanged = true;
6688                invalidate();
6689            }
6690
6691            // Check if our height changed
6692            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6693                int desiredHeight = getDesiredHeight();
6694
6695                if (desiredHeight != this.getHeight()) {
6696                    sizeChanged = true;
6697                }
6698            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6699                if (mDesiredHeightAtMeasure >= 0) {
6700                    int desiredHeight = getDesiredHeight();
6701
6702                    if (desiredHeight != mDesiredHeightAtMeasure) {
6703                        sizeChanged = true;
6704                    }
6705                }
6706            }
6707        }
6708
6709        if (sizeChanged) {
6710            requestLayout();
6711            // caller will have already invalidated
6712        }
6713    }
6714
6715    /**
6716     * Check whether entirely new text requires a new view layout
6717     * or merely a new text layout.
6718     */
6719    private void checkForRelayout() {
6720        // If we have a fixed width, we can just swap in a new text layout
6721        // if the text height stays the same or if the view height is fixed.
6722
6723        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6724                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6725                (mHint == null || mHintLayout != null) &&
6726                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6727            // Static width, so try making a new text layout.
6728
6729            int oldht = mLayout.getHeight();
6730            int want = mLayout.getWidth();
6731            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6732
6733            /*
6734             * No need to bring the text into view, since the size is not
6735             * changing (unless we do the requestLayout(), in which case it
6736             * will happen at measure).
6737             */
6738            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6739                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6740                          false);
6741
6742            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6743                // In a fixed-height view, so use our new text layout.
6744                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6745                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6746                    invalidate();
6747                    return;
6748                }
6749
6750                // Dynamic height, but height has stayed the same,
6751                // so use our new text layout.
6752                if (mLayout.getHeight() == oldht &&
6753                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6754                    invalidate();
6755                    return;
6756                }
6757            }
6758
6759            // We lose: the height has changed and we have a dynamic height.
6760            // Request a new view layout using our new text layout.
6761            requestLayout();
6762            invalidate();
6763        } else {
6764            // Dynamic width, so we have no choice but to request a new
6765            // view layout with a new text layout.
6766            nullLayouts();
6767            requestLayout();
6768            invalidate();
6769        }
6770    }
6771
6772    @Override
6773    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
6774        super.onLayout(changed, left, top, right, bottom);
6775        if (changed) mTextDisplayListIsValid = false;
6776    }
6777
6778    /**
6779     * Returns true if anything changed.
6780     */
6781    private boolean bringTextIntoView() {
6782        int line = 0;
6783        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6784            line = mLayout.getLineCount() - 1;
6785        }
6786
6787        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6788        int dir = mLayout.getParagraphDirection(line);
6789        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6790        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6791        int ht = mLayout.getHeight();
6792
6793        int scrollx, scrolly;
6794
6795        // Convert to left, center, or right alignment.
6796        if (a == Layout.Alignment.ALIGN_NORMAL) {
6797            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6798                Layout.Alignment.ALIGN_RIGHT;
6799        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6800            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6801                Layout.Alignment.ALIGN_LEFT;
6802        }
6803
6804        if (a == Layout.Alignment.ALIGN_CENTER) {
6805            /*
6806             * Keep centered if possible, or, if it is too wide to fit,
6807             * keep leading edge in view.
6808             */
6809
6810            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6811            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6812
6813            if (right - left < hspace) {
6814                scrollx = (right + left) / 2 - hspace / 2;
6815            } else {
6816                if (dir < 0) {
6817                    scrollx = right - hspace;
6818                } else {
6819                    scrollx = left;
6820                }
6821            }
6822        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6823            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6824            scrollx = right - hspace;
6825        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6826            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6827        }
6828
6829        if (ht < vspace) {
6830            scrolly = 0;
6831        } else {
6832            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6833                scrolly = ht - vspace;
6834            } else {
6835                scrolly = 0;
6836            }
6837        }
6838
6839        if (scrollx != mScrollX || scrolly != mScrollY) {
6840            scrollTo(scrollx, scrolly);
6841            return true;
6842        } else {
6843            return false;
6844        }
6845    }
6846
6847    /**
6848     * Move the point, specified by the offset, into the view if it is needed.
6849     * This has to be called after layout. Returns true if anything changed.
6850     */
6851    public boolean bringPointIntoView(int offset) {
6852        boolean changed = false;
6853
6854        if (mLayout == null) return changed;
6855
6856        int line = mLayout.getLineForOffset(offset);
6857
6858        // FIXME: Is it okay to truncate this, or should we round?
6859        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6860        final int top = mLayout.getLineTop(line);
6861        final int bottom = mLayout.getLineTop(line + 1);
6862
6863        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6864        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6865        int ht = mLayout.getHeight();
6866
6867        int grav;
6868
6869        switch (mLayout.getParagraphAlignment(line)) {
6870            case ALIGN_LEFT:
6871                grav = 1;
6872                break;
6873            case ALIGN_RIGHT:
6874                grav = -1;
6875                break;
6876            case ALIGN_NORMAL:
6877                grav = mLayout.getParagraphDirection(line);
6878                break;
6879            case ALIGN_OPPOSITE:
6880                grav = -mLayout.getParagraphDirection(line);
6881                break;
6882            case ALIGN_CENTER:
6883            default:
6884                grav = 0;
6885                break;
6886        }
6887
6888        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6889        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6890
6891        int hslack = (bottom - top) / 2;
6892        int vslack = hslack;
6893
6894        if (vslack > vspace / 4)
6895            vslack = vspace / 4;
6896        if (hslack > hspace / 4)
6897            hslack = hspace / 4;
6898
6899        int hs = mScrollX;
6900        int vs = mScrollY;
6901
6902        if (top - vs < vslack)
6903            vs = top - vslack;
6904        if (bottom - vs > vspace - vslack)
6905            vs = bottom - (vspace - vslack);
6906        if (ht - vs < vspace)
6907            vs = ht - vspace;
6908        if (0 - vs > 0)
6909            vs = 0;
6910
6911        if (grav != 0) {
6912            if (x - hs < hslack) {
6913                hs = x - hslack;
6914            }
6915            if (x - hs > hspace - hslack) {
6916                hs = x - (hspace - hslack);
6917            }
6918        }
6919
6920        if (grav < 0) {
6921            if (left - hs > 0)
6922                hs = left;
6923            if (right - hs < hspace)
6924                hs = right - hspace;
6925        } else if (grav > 0) {
6926            if (right - hs < hspace)
6927                hs = right - hspace;
6928            if (left - hs > 0)
6929                hs = left;
6930        } else /* grav == 0 */ {
6931            if (right - left <= hspace) {
6932                /*
6933                 * If the entire text fits, center it exactly.
6934                 */
6935                hs = left - (hspace - (right - left)) / 2;
6936            } else if (x > right - hslack) {
6937                /*
6938                 * If we are near the right edge, keep the right edge
6939                 * at the edge of the view.
6940                 */
6941                hs = right - hspace;
6942            } else if (x < left + hslack) {
6943                /*
6944                 * If we are near the left edge, keep the left edge
6945                 * at the edge of the view.
6946                 */
6947                hs = left;
6948            } else if (left > hs) {
6949                /*
6950                 * Is there whitespace visible at the left?  Fix it if so.
6951                 */
6952                hs = left;
6953            } else if (right < hs + hspace) {
6954                /*
6955                 * Is there whitespace visible at the right?  Fix it if so.
6956                 */
6957                hs = right - hspace;
6958            } else {
6959                /*
6960                 * Otherwise, float as needed.
6961                 */
6962                if (x - hs < hslack) {
6963                    hs = x - hslack;
6964                }
6965                if (x - hs > hspace - hslack) {
6966                    hs = x - (hspace - hslack);
6967                }
6968            }
6969        }
6970
6971        if (hs != mScrollX || vs != mScrollY) {
6972            if (mScroller == null) {
6973                scrollTo(hs, vs);
6974            } else {
6975                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6976                int dx = hs - mScrollX;
6977                int dy = vs - mScrollY;
6978
6979                if (duration > ANIMATED_SCROLL_GAP) {
6980                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6981                    awakenScrollBars(mScroller.getDuration());
6982                    invalidate();
6983                } else {
6984                    if (!mScroller.isFinished()) {
6985                        mScroller.abortAnimation();
6986                    }
6987
6988                    scrollBy(dx, dy);
6989                }
6990
6991                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6992            }
6993
6994            changed = true;
6995        }
6996
6997        if (isFocused()) {
6998            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6999            // requestRectangleOnScreen() is in terms of content coordinates.
7000
7001            if (mTempRect == null) mTempRect = new Rect();
7002            // The offsets here are to ensure the rectangle we are using is
7003            // within our view bounds, in case the cursor is on the far left
7004            // or right.  If it isn't withing the bounds, then this request
7005            // will be ignored.
7006            mTempRect.set(x - 2, top, x + 2, bottom);
7007            getInterestingRect(mTempRect, line);
7008            mTempRect.offset(mScrollX, mScrollY);
7009
7010            if (requestRectangleOnScreen(mTempRect)) {
7011                changed = true;
7012            }
7013        }
7014
7015        return changed;
7016    }
7017
7018    /**
7019     * Move the cursor, if needed, so that it is at an offset that is visible
7020     * to the user.  This will not move the cursor if it represents more than
7021     * one character (a selection range).  This will only work if the
7022     * TextView contains spannable text; otherwise it will do nothing.
7023     *
7024     * @return True if the cursor was actually moved, false otherwise.
7025     */
7026    public boolean moveCursorToVisibleOffset() {
7027        if (!(mText instanceof Spannable)) {
7028            return false;
7029        }
7030        int start = getSelectionStart();
7031        int end = getSelectionEnd();
7032        if (start != end) {
7033            return false;
7034        }
7035
7036        // First: make sure the line is visible on screen:
7037
7038        int line = mLayout.getLineForOffset(start);
7039
7040        final int top = mLayout.getLineTop(line);
7041        final int bottom = mLayout.getLineTop(line + 1);
7042        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7043        int vslack = (bottom - top) / 2;
7044        if (vslack > vspace / 4)
7045            vslack = vspace / 4;
7046        final int vs = mScrollY;
7047
7048        if (top < (vs+vslack)) {
7049            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7050        } else if (bottom > (vspace+vs-vslack)) {
7051            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7052        }
7053
7054        // Next: make sure the character is visible on screen:
7055
7056        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7057        final int hs = mScrollX;
7058        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7059        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7060
7061        // line might contain bidirectional text
7062        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7063        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7064
7065        int newStart = start;
7066        if (newStart < lowChar) {
7067            newStart = lowChar;
7068        } else if (newStart > highChar) {
7069            newStart = highChar;
7070        }
7071
7072        if (newStart != start) {
7073            Selection.setSelection((Spannable)mText, newStart);
7074            return true;
7075        }
7076
7077        return false;
7078    }
7079
7080    @Override
7081    public void computeScroll() {
7082        if (mScroller != null) {
7083            if (mScroller.computeScrollOffset()) {
7084                mScrollX = mScroller.getCurrX();
7085                mScrollY = mScroller.getCurrY();
7086                invalidateParentCaches();
7087                postInvalidate();  // So we draw again
7088            }
7089        }
7090    }
7091
7092    private void getInterestingRect(Rect r, int line) {
7093        convertFromViewportToContentCoordinates(r);
7094
7095        // Rectangle can can be expanded on first and last line to take
7096        // padding into account.
7097        // TODO Take left/right padding into account too?
7098        if (line == 0) r.top -= getExtendedPaddingTop();
7099        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7100    }
7101
7102    private void convertFromViewportToContentCoordinates(Rect r) {
7103        final int horizontalOffset = viewportToContentHorizontalOffset();
7104        r.left += horizontalOffset;
7105        r.right += horizontalOffset;
7106
7107        final int verticalOffset = viewportToContentVerticalOffset();
7108        r.top += verticalOffset;
7109        r.bottom += verticalOffset;
7110    }
7111
7112    private int viewportToContentHorizontalOffset() {
7113        return getCompoundPaddingLeft() - mScrollX;
7114    }
7115
7116    private int viewportToContentVerticalOffset() {
7117        int offset = getExtendedPaddingTop() - mScrollY;
7118        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7119            offset += getVerticalOffset(false);
7120        }
7121        return offset;
7122    }
7123
7124    @Override
7125    public void debug(int depth) {
7126        super.debug(depth);
7127
7128        String output = debugIndent(depth);
7129        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7130                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7131                + "} ";
7132
7133        if (mText != null) {
7134
7135            output += "mText=\"" + mText + "\" ";
7136            if (mLayout != null) {
7137                output += "mLayout width=" + mLayout.getWidth()
7138                        + " height=" + mLayout.getHeight();
7139            }
7140        } else {
7141            output += "mText=NULL";
7142        }
7143        Log.d(VIEW_LOG_TAG, output);
7144    }
7145
7146    /**
7147     * Convenience for {@link Selection#getSelectionStart}.
7148     */
7149    @ViewDebug.ExportedProperty(category = "text")
7150    public int getSelectionStart() {
7151        return Selection.getSelectionStart(getText());
7152    }
7153
7154    /**
7155     * Convenience for {@link Selection#getSelectionEnd}.
7156     */
7157    @ViewDebug.ExportedProperty(category = "text")
7158    public int getSelectionEnd() {
7159        return Selection.getSelectionEnd(getText());
7160    }
7161
7162    /**
7163     * Return true iff there is a selection inside this text view.
7164     */
7165    public boolean hasSelection() {
7166        final int selectionStart = getSelectionStart();
7167        final int selectionEnd = getSelectionEnd();
7168
7169        return selectionStart >= 0 && selectionStart != selectionEnd;
7170    }
7171
7172    /**
7173     * Sets the properties of this field (lines, horizontally scrolling,
7174     * transformation method) to be for a single-line input.
7175     *
7176     * @attr ref android.R.styleable#TextView_singleLine
7177     */
7178    public void setSingleLine() {
7179        setSingleLine(true);
7180    }
7181
7182    /**
7183     * Sets the properties of this field to transform input to ALL CAPS
7184     * display. This may use a "small caps" formatting if available.
7185     * This setting will be ignored if this field is editable or selectable.
7186     *
7187     * This call replaces the current transformation method. Disabling this
7188     * will not necessarily restore the previous behavior from before this
7189     * was enabled.
7190     *
7191     * @see #setTransformationMethod(TransformationMethod)
7192     * @attr ref android.R.styleable#TextView_textAllCaps
7193     */
7194    public void setAllCaps(boolean allCaps) {
7195        if (allCaps) {
7196            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7197        } else {
7198            setTransformationMethod(null);
7199        }
7200    }
7201
7202    /**
7203     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7204     * transformation method) to be for a single-line input; if false, restores these to the default
7205     * conditions.
7206     *
7207     * Note that the default conditions are not necessarily those that were in effect prior this
7208     * method, and you may want to reset these properties to your custom values.
7209     *
7210     * @attr ref android.R.styleable#TextView_singleLine
7211     */
7212    @android.view.RemotableViewMethod
7213    public void setSingleLine(boolean singleLine) {
7214        // Could be used, but may break backward compatibility.
7215        // if (mSingleLine == singleLine) return;
7216        setInputTypeSingleLine(singleLine);
7217        applySingleLine(singleLine, true, true);
7218    }
7219
7220    /**
7221     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7222     * @param singleLine
7223     */
7224    private void setInputTypeSingleLine(boolean singleLine) {
7225        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7226            if (singleLine) {
7227                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7228            } else {
7229                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7230            }
7231        }
7232    }
7233
7234    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7235            boolean changeMaxLines) {
7236        mSingleLine = singleLine;
7237        if (singleLine) {
7238            setLines(1);
7239            setHorizontallyScrolling(true);
7240            if (applyTransformation) {
7241                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7242            }
7243        } else {
7244            if (changeMaxLines) {
7245                setMaxLines(Integer.MAX_VALUE);
7246            }
7247            setHorizontallyScrolling(false);
7248            if (applyTransformation) {
7249                setTransformationMethod(null);
7250            }
7251        }
7252    }
7253
7254    /**
7255     * Causes words in the text that are longer than the view is wide
7256     * to be ellipsized instead of broken in the middle.  You may also
7257     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7258     * to constrain the text to a single line.  Use <code>null</code>
7259     * to turn off ellipsizing.
7260     *
7261     * If {@link #setMaxLines} has been used to set two or more lines,
7262     * {@link android.text.TextUtils.TruncateAt#END} and
7263     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7264     * (other ellipsizing types will not do anything).
7265     *
7266     * @attr ref android.R.styleable#TextView_ellipsize
7267     */
7268    public void setEllipsize(TextUtils.TruncateAt where) {
7269        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7270        if (mEllipsize != where) {
7271            mEllipsize = where;
7272
7273            if (mLayout != null) {
7274                nullLayouts();
7275                requestLayout();
7276                invalidate();
7277            }
7278        }
7279    }
7280
7281    /**
7282     * Sets how many times to repeat the marquee animation. Only applied if the
7283     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7284     *
7285     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7286     */
7287    public void setMarqueeRepeatLimit(int marqueeLimit) {
7288        mMarqueeRepeatLimit = marqueeLimit;
7289    }
7290
7291    /**
7292     * Returns where, if anywhere, words that are longer than the view
7293     * is wide should be ellipsized.
7294     */
7295    @ViewDebug.ExportedProperty
7296    public TextUtils.TruncateAt getEllipsize() {
7297        return mEllipsize;
7298    }
7299
7300    /**
7301     * Set the TextView so that when it takes focus, all the text is
7302     * selected.
7303     *
7304     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7305     */
7306    @android.view.RemotableViewMethod
7307    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7308        mSelectAllOnFocus = selectAllOnFocus;
7309
7310        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7311            setText(mText, BufferType.SPANNABLE);
7312        }
7313    }
7314
7315    /**
7316     * Set whether the cursor is visible.  The default is true.
7317     *
7318     * @attr ref android.R.styleable#TextView_cursorVisible
7319     */
7320    @android.view.RemotableViewMethod
7321    public void setCursorVisible(boolean visible) {
7322        if (mCursorVisible != visible) {
7323            mCursorVisible = visible;
7324            invalidate();
7325
7326            makeBlink();
7327
7328            // InsertionPointCursorController depends on mCursorVisible
7329            prepareCursorControllers();
7330        }
7331    }
7332
7333    private boolean isCursorVisible() {
7334        return mCursorVisible && isTextEditable();
7335    }
7336
7337    private boolean canMarquee() {
7338        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7339        return width > 0 && (mLayout.getLineWidth(0) > width ||
7340                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7341                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7342    }
7343
7344    private void startMarquee() {
7345        // Do not ellipsize EditText
7346        if (mInput != null) return;
7347
7348        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7349            return;
7350        }
7351
7352        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7353                getLineCount() == 1 && canMarquee()) {
7354
7355            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7356                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7357                final Layout tmp = mLayout;
7358                mLayout = mSavedMarqueeModeLayout;
7359                mSavedMarqueeModeLayout = tmp;
7360                setHorizontalFadingEdgeEnabled(true);
7361                requestLayout();
7362                invalidate();
7363            }
7364
7365            if (mMarquee == null) mMarquee = new Marquee(this);
7366            mMarquee.start(mMarqueeRepeatLimit);
7367        }
7368    }
7369
7370    private void stopMarquee() {
7371        if (mMarquee != null && !mMarquee.isStopped()) {
7372            mMarquee.stop();
7373        }
7374
7375        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7376            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7377            final Layout tmp = mSavedMarqueeModeLayout;
7378            mSavedMarqueeModeLayout = mLayout;
7379            mLayout = tmp;
7380            setHorizontalFadingEdgeEnabled(false);
7381            requestLayout();
7382            invalidate();
7383        }
7384    }
7385
7386    private void startStopMarquee(boolean start) {
7387        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7388            if (start) {
7389                startMarquee();
7390            } else {
7391                stopMarquee();
7392            }
7393        }
7394    }
7395
7396    private static final class Marquee extends Handler {
7397        // TODO: Add an option to configure this
7398        private static final float MARQUEE_DELTA_MAX = 0.07f;
7399        private static final int MARQUEE_DELAY = 1200;
7400        private static final int MARQUEE_RESTART_DELAY = 1200;
7401        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7402        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7403
7404        private static final byte MARQUEE_STOPPED = 0x0;
7405        private static final byte MARQUEE_STARTING = 0x1;
7406        private static final byte MARQUEE_RUNNING = 0x2;
7407
7408        private static final int MESSAGE_START = 0x1;
7409        private static final int MESSAGE_TICK = 0x2;
7410        private static final int MESSAGE_RESTART = 0x3;
7411
7412        private final WeakReference<TextView> mView;
7413
7414        private byte mStatus = MARQUEE_STOPPED;
7415        private final float mScrollUnit;
7416        private float mMaxScroll;
7417        float mMaxFadeScroll;
7418        private float mGhostStart;
7419        private float mGhostOffset;
7420        private float mFadeStop;
7421        private int mRepeatLimit;
7422
7423        float mScroll;
7424
7425        Marquee(TextView v) {
7426            final float density = v.getContext().getResources().getDisplayMetrics().density;
7427            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7428            mView = new WeakReference<TextView>(v);
7429        }
7430
7431        @Override
7432        public void handleMessage(Message msg) {
7433            switch (msg.what) {
7434                case MESSAGE_START:
7435                    mStatus = MARQUEE_RUNNING;
7436                    tick();
7437                    break;
7438                case MESSAGE_TICK:
7439                    tick();
7440                    break;
7441                case MESSAGE_RESTART:
7442                    if (mStatus == MARQUEE_RUNNING) {
7443                        if (mRepeatLimit >= 0) {
7444                            mRepeatLimit--;
7445                        }
7446                        start(mRepeatLimit);
7447                    }
7448                    break;
7449            }
7450        }
7451
7452        void tick() {
7453            if (mStatus != MARQUEE_RUNNING) {
7454                return;
7455            }
7456
7457            removeMessages(MESSAGE_TICK);
7458
7459            final TextView textView = mView.get();
7460            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7461                mScroll += mScrollUnit;
7462                if (mScroll > mMaxScroll) {
7463                    mScroll = mMaxScroll;
7464                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7465                } else {
7466                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7467                }
7468                textView.invalidate();
7469            }
7470        }
7471
7472        void stop() {
7473            mStatus = MARQUEE_STOPPED;
7474            removeMessages(MESSAGE_START);
7475            removeMessages(MESSAGE_RESTART);
7476            removeMessages(MESSAGE_TICK);
7477            resetScroll();
7478        }
7479
7480        private void resetScroll() {
7481            mScroll = 0.0f;
7482            final TextView textView = mView.get();
7483            if (textView != null) textView.invalidate();
7484        }
7485
7486        void start(int repeatLimit) {
7487            if (repeatLimit == 0) {
7488                stop();
7489                return;
7490            }
7491            mRepeatLimit = repeatLimit;
7492            final TextView textView = mView.get();
7493            if (textView != null && textView.mLayout != null) {
7494                mStatus = MARQUEE_STARTING;
7495                mScroll = 0.0f;
7496                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7497                        textView.getCompoundPaddingRight();
7498                final float lineWidth = textView.mLayout.getLineWidth(0);
7499                final float gap = textWidth / 3.0f;
7500                mGhostStart = lineWidth - textWidth + gap;
7501                mMaxScroll = mGhostStart + textWidth;
7502                mGhostOffset = lineWidth + gap;
7503                mFadeStop = lineWidth + textWidth / 6.0f;
7504                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7505
7506                textView.invalidate();
7507                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7508            }
7509        }
7510
7511        float getGhostOffset() {
7512            return mGhostOffset;
7513        }
7514
7515        boolean shouldDrawLeftFade() {
7516            return mScroll <= mFadeStop;
7517        }
7518
7519        boolean shouldDrawGhost() {
7520            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7521        }
7522
7523        boolean isRunning() {
7524            return mStatus == MARQUEE_RUNNING;
7525        }
7526
7527        boolean isStopped() {
7528            return mStatus == MARQUEE_STOPPED;
7529        }
7530    }
7531
7532    /**
7533     * This method is called when the text is changed, in case any subclasses
7534     * would like to know.
7535     *
7536     * Within <code>text</code>, the <code>lengthAfter</code> characters
7537     * beginning at <code>start</code> have just replaced old text that had
7538     * length <code>lengthBefore</code>. It is an error to attempt to make
7539     * changes to <code>text</code> from this callback.
7540     *
7541     * @param text The text the TextView is displaying
7542     * @param start The offset of the start of the range of the text that was
7543     * modified
7544     * @param lengthBefore The length of the former text that has been replaced
7545     * @param lengthAfter The length of the replacement modified text
7546     */
7547    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7548        // intentionally empty, template pattern method can be overridden by subclasses
7549    }
7550
7551    /**
7552     * This method is called when the selection has changed, in case any
7553     * subclasses would like to know.
7554     *
7555     * @param selStart The new selection start location.
7556     * @param selEnd The new selection end location.
7557     */
7558    protected void onSelectionChanged(int selStart, int selEnd) {
7559        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7560        mTextDisplayListIsValid = false;
7561    }
7562
7563    /**
7564     * Adds a TextWatcher to the list of those whose methods are called
7565     * whenever this TextView's text changes.
7566     * <p>
7567     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7568     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7569     * if there are any text changed listeners forces the buffer type to
7570     * Editable if it would not otherwise be and does call this method.
7571     */
7572    public void addTextChangedListener(TextWatcher watcher) {
7573        if (mListeners == null) {
7574            mListeners = new ArrayList<TextWatcher>();
7575        }
7576
7577        mListeners.add(watcher);
7578    }
7579
7580    /**
7581     * Removes the specified TextWatcher from the list of those whose
7582     * methods are called
7583     * whenever this TextView's text changes.
7584     */
7585    public void removeTextChangedListener(TextWatcher watcher) {
7586        if (mListeners != null) {
7587            int i = mListeners.indexOf(watcher);
7588
7589            if (i >= 0) {
7590                mListeners.remove(i);
7591            }
7592        }
7593    }
7594
7595    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7596        if (mListeners != null) {
7597            final ArrayList<TextWatcher> list = mListeners;
7598            final int count = list.size();
7599            for (int i = 0; i < count; i++) {
7600                list.get(i).beforeTextChanged(text, start, before, after);
7601            }
7602        }
7603
7604        // The spans that are inside or intersect the modified region no longer make sense
7605        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7606        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7607    }
7608
7609    // Removes all spans that are inside or actually overlap the start..end range
7610    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7611        if (!(mText instanceof Editable)) return;
7612        Editable text = (Editable) mText;
7613
7614        T[] spans = text.getSpans(start, end, type);
7615        final int length = spans.length;
7616        for (int i = 0; i < length; i++) {
7617            final int s = text.getSpanStart(spans[i]);
7618            final int e = text.getSpanEnd(spans[i]);
7619            // Spans that are adjacent to the edited region will be handled in
7620            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7621            if (e == start || s == end) break;
7622            text.removeSpan(spans[i]);
7623        }
7624    }
7625
7626    /**
7627     * Not private so it can be called from an inner class without going
7628     * through a thunk.
7629     */
7630    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7631        if (mListeners != null) {
7632            final ArrayList<TextWatcher> list = mListeners;
7633            final int count = list.size();
7634            for (int i = 0; i < count; i++) {
7635                list.get(i).onTextChanged(text, start, before, after);
7636            }
7637        }
7638
7639        updateSpellCheckSpans(start, start + after, false);
7640        mTextDisplayListIsValid = false;
7641
7642        // Hide the controllers as soon as text is modified (typing, procedural...)
7643        // We do not hide the span controllers, since they can be added when a new text is
7644        // inserted into the text view (voice IME).
7645        hideCursorControllers();
7646    }
7647
7648    /**
7649     * Not private so it can be called from an inner class without going
7650     * through a thunk.
7651     */
7652    void sendAfterTextChanged(Editable text) {
7653        if (mListeners != null) {
7654            final ArrayList<TextWatcher> list = mListeners;
7655            final int count = list.size();
7656            for (int i = 0; i < count; i++) {
7657                list.get(i).afterTextChanged(text);
7658            }
7659        }
7660    }
7661
7662    /**
7663     * Not private so it can be called from an inner class without going
7664     * through a thunk.
7665     */
7666    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7667        final InputMethodState ims = mInputMethodState;
7668        if (ims == null || ims.mBatchEditNesting == 0) {
7669            updateAfterEdit();
7670        }
7671        if (ims != null) {
7672            ims.mContentChanged = true;
7673            if (ims.mChangedStart < 0) {
7674                ims.mChangedStart = start;
7675                ims.mChangedEnd = start+before;
7676            } else {
7677                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7678                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7679            }
7680            ims.mChangedDelta += after-before;
7681        }
7682
7683        sendOnTextChanged(buffer, start, before, after);
7684        onTextChanged(buffer, start, before, after);
7685    }
7686
7687    /**
7688     * Not private so it can be called from an inner class without going
7689     * through a thunk.
7690     */
7691    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7692        // XXX Make the start and end move together if this ends up
7693        // spending too much time invalidating.
7694
7695        boolean selChanged = false;
7696        int newSelStart=-1, newSelEnd=-1;
7697
7698        final InputMethodState ims = mInputMethodState;
7699
7700        if (what == Selection.SELECTION_END) {
7701            mHighlightPathBogus = true;
7702            selChanged = true;
7703            newSelEnd = newStart;
7704
7705            if (!isFocused()) {
7706                mSelectionMoved = true;
7707            }
7708
7709            if (oldStart >= 0 || newStart >= 0) {
7710                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7711                registerForPreDraw();
7712                makeBlink();
7713            }
7714        }
7715
7716        if (what == Selection.SELECTION_START) {
7717            mHighlightPathBogus = true;
7718            selChanged = true;
7719            newSelStart = newStart;
7720
7721            if (!isFocused()) {
7722                mSelectionMoved = true;
7723            }
7724
7725            if (oldStart >= 0 || newStart >= 0) {
7726                int end = Selection.getSelectionEnd(buf);
7727                invalidateCursor(end, oldStart, newStart);
7728            }
7729        }
7730
7731        if (selChanged) {
7732            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7733                if (newSelStart < 0) {
7734                    newSelStart = Selection.getSelectionStart(buf);
7735                }
7736                if (newSelEnd < 0) {
7737                    newSelEnd = Selection.getSelectionEnd(buf);
7738                }
7739                onSelectionChanged(newSelStart, newSelEnd);
7740            }
7741        }
7742
7743        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle ||
7744                what instanceof CharacterStyle) {
7745            if (ims == null || ims.mBatchEditNesting == 0) {
7746                invalidate();
7747                mHighlightPathBogus = true;
7748                checkForResize();
7749            } else {
7750                ims.mContentChanged = true;
7751            }
7752            mTextDisplayListIsValid = false;
7753        }
7754
7755        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7756            mHighlightPathBogus = true;
7757            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7758                ims.mSelectionModeChanged = true;
7759            }
7760
7761            if (Selection.getSelectionStart(buf) >= 0) {
7762                if (ims == null || ims.mBatchEditNesting == 0) {
7763                    invalidateCursor();
7764                } else {
7765                    ims.mCursorChanged = true;
7766                }
7767            }
7768        }
7769
7770        if (what instanceof ParcelableSpan) {
7771            // If this is a span that can be sent to a remote process,
7772            // the current extract editor would be interested in it.
7773            if (ims != null && ims.mExtracting != null) {
7774                if (ims.mBatchEditNesting != 0) {
7775                    if (oldStart >= 0) {
7776                        if (ims.mChangedStart > oldStart) {
7777                            ims.mChangedStart = oldStart;
7778                        }
7779                        if (ims.mChangedStart > oldEnd) {
7780                            ims.mChangedStart = oldEnd;
7781                        }
7782                    }
7783                    if (newStart >= 0) {
7784                        if (ims.mChangedStart > newStart) {
7785                            ims.mChangedStart = newStart;
7786                        }
7787                        if (ims.mChangedStart > newEnd) {
7788                            ims.mChangedStart = newEnd;
7789                        }
7790                    }
7791                } else {
7792                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7793                            + oldStart + "-" + oldEnd + ","
7794                            + newStart + "-" + newEnd + what);
7795                    ims.mContentChanged = true;
7796                }
7797            }
7798        }
7799
7800        if (mSpellChecker != null && newStart < 0 && what instanceof SpellCheckSpan) {
7801            mSpellChecker.removeSpellCheckSpan((SpellCheckSpan) what);
7802        }
7803    }
7804
7805    /**
7806     * Create new SpellCheckSpans on the modified region.
7807     */
7808    private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) {
7809        if (isTextEditable() && isSuggestionsEnabled() && !(this instanceof ExtractEditText)) {
7810            if (mSpellChecker == null && createSpellChecker) {
7811                mSpellChecker = new SpellChecker(this);
7812            }
7813            if (mSpellChecker != null) {
7814                mSpellChecker.spellCheck(start, end);
7815            }
7816        }
7817    }
7818
7819    /**
7820     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7821     * pop-up should be displayed.
7822     */
7823    private class EasyEditSpanController {
7824
7825        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7826
7827        private EasyEditPopupWindow mPopupWindow;
7828
7829        private EasyEditSpan mEasyEditSpan;
7830
7831        private Runnable mHidePopup;
7832
7833        private void hide() {
7834            if (mPopupWindow != null) {
7835                mPopupWindow.hide();
7836                TextView.this.removeCallbacks(mHidePopup);
7837            }
7838            removeSpans(mText);
7839            mEasyEditSpan = null;
7840        }
7841
7842        /**
7843         * Monitors the changes in the text.
7844         *
7845         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7846         * as the notifications are not sent when a spannable (with spans) is inserted.
7847         */
7848        public void onTextChange(CharSequence buffer) {
7849            adjustSpans(mText);
7850
7851            if (getWindowVisibility() != View.VISIBLE) {
7852                // The window is not visible yet, ignore the text change.
7853                return;
7854            }
7855
7856            if (mLayout == null) {
7857                // The view has not been layout yet, ignore the text change
7858                return;
7859            }
7860
7861            InputMethodManager imm = InputMethodManager.peekInstance();
7862            if (!(TextView.this instanceof ExtractEditText)
7863                    && imm != null && imm.isFullscreenMode()) {
7864                // The input is in extract mode. We do not have to handle the easy edit in the
7865                // original TextView, as the ExtractEditText will do
7866                return;
7867            }
7868
7869            // Remove the current easy edit span, as the text changed, and remove the pop-up
7870            // (if any)
7871            if (mEasyEditSpan != null) {
7872                if (mText instanceof Spannable) {
7873                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7874                }
7875                mEasyEditSpan = null;
7876            }
7877            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7878                mPopupWindow.hide();
7879            }
7880
7881            // Display the new easy edit span (if any).
7882            if (buffer instanceof Spanned) {
7883                mEasyEditSpan = getSpan((Spanned) buffer);
7884                if (mEasyEditSpan != null) {
7885                    if (mPopupWindow == null) {
7886                        mPopupWindow = new EasyEditPopupWindow();
7887                        mHidePopup = new Runnable() {
7888                            @Override
7889                            public void run() {
7890                                hide();
7891                            }
7892                        };
7893                    }
7894                    mPopupWindow.show(mEasyEditSpan);
7895                    TextView.this.removeCallbacks(mHidePopup);
7896                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7897                }
7898            }
7899        }
7900
7901        /**
7902         * Adjusts the spans by removing all of them except the last one.
7903         */
7904        private void adjustSpans(CharSequence buffer) {
7905            // This method enforces that only one easy edit span is attached to the text.
7906            // A better way to enforce this would be to listen for onSpanAdded, but this method
7907            // cannot be used in this scenario as no notification is triggered when a text with
7908            // spans is inserted into a text.
7909            if (buffer instanceof Spannable) {
7910                Spannable spannable = (Spannable) buffer;
7911                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7912                        EasyEditSpan.class);
7913                for (int i = 0; i < spans.length - 1; i++) {
7914                    spannable.removeSpan(spans[i]);
7915                }
7916            }
7917        }
7918
7919        /**
7920         * Removes all the {@link EasyEditSpan} currently attached.
7921         */
7922        private void removeSpans(CharSequence buffer) {
7923            if (buffer instanceof Spannable) {
7924                Spannable spannable = (Spannable) buffer;
7925                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7926                        EasyEditSpan.class);
7927                for (int i = 0; i < spans.length; i++) {
7928                    spannable.removeSpan(spans[i]);
7929                }
7930            }
7931        }
7932
7933        private EasyEditSpan getSpan(Spanned spanned) {
7934            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7935                    EasyEditSpan.class);
7936            if (easyEditSpans.length == 0) {
7937                return null;
7938            } else {
7939                return easyEditSpans[0];
7940            }
7941        }
7942    }
7943
7944    /**
7945     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7946     * by {@link EasyEditSpanController}.
7947     */
7948    private class EasyEditPopupWindow extends PinnedPopupWindow
7949            implements OnClickListener {
7950        private static final int POPUP_TEXT_LAYOUT =
7951                com.android.internal.R.layout.text_edit_action_popup_text;
7952        private TextView mDeleteTextView;
7953        private EasyEditSpan mEasyEditSpan;
7954
7955        @Override
7956        protected void createPopupWindow() {
7957            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7958                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7959            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7960            mPopupWindow.setClippingEnabled(true);
7961        }
7962
7963        @Override
7964        protected void initContentView() {
7965            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7966            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7967            mContentView = linearLayout;
7968            mContentView.setBackgroundResource(
7969                    com.android.internal.R.drawable.text_edit_side_paste_window);
7970
7971            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7972                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7973
7974            LayoutParams wrapContent = new LayoutParams(
7975                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7976
7977            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7978            mDeleteTextView.setLayoutParams(wrapContent);
7979            mDeleteTextView.setText(com.android.internal.R.string.delete);
7980            mDeleteTextView.setOnClickListener(this);
7981            mContentView.addView(mDeleteTextView);
7982        }
7983
7984        public void show(EasyEditSpan easyEditSpan) {
7985            mEasyEditSpan = easyEditSpan;
7986            super.show();
7987        }
7988
7989        @Override
7990        public void onClick(View view) {
7991            if (view == mDeleteTextView) {
7992                Editable editable = (Editable) mText;
7993                int start = editable.getSpanStart(mEasyEditSpan);
7994                int end = editable.getSpanEnd(mEasyEditSpan);
7995                if (start >= 0 && end >= 0) {
7996                    deleteText_internal(start, end);
7997                }
7998            }
7999        }
8000
8001        @Override
8002        protected int getTextOffset() {
8003            // Place the pop-up at the end of the span
8004            Editable editable = (Editable) mText;
8005            return editable.getSpanEnd(mEasyEditSpan);
8006        }
8007
8008        @Override
8009        protected int getVerticalLocalPosition(int line) {
8010            return mLayout.getLineBottom(line);
8011        }
8012
8013        @Override
8014        protected int clipVertically(int positionY) {
8015            // As we display the pop-up below the span, no vertical clipping is required.
8016            return positionY;
8017        }
8018    }
8019
8020    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8021
8022        private CharSequence mBeforeText;
8023
8024        private EasyEditSpanController mEasyEditSpanController;
8025
8026        private ChangeWatcher() {
8027            mEasyEditSpanController = new EasyEditSpanController();
8028        }
8029
8030        public void beforeTextChanged(CharSequence buffer, int start,
8031                                      int before, int after) {
8032            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8033                    + " before=" + before + " after=" + after + ": " + buffer);
8034
8035            if (AccessibilityManager.getInstance(mContext).isEnabled()
8036                    && !isPasswordInputType(mInputType)
8037                    && !hasPasswordTransformationMethod()) {
8038                mBeforeText = buffer.toString();
8039            }
8040
8041            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8042        }
8043
8044        public void onTextChanged(CharSequence buffer, int start,
8045                                  int before, int after) {
8046            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8047                    + " before=" + before + " after=" + after + ": " + buffer);
8048            TextView.this.handleTextChanged(buffer, start, before, after);
8049
8050            mEasyEditSpanController.onTextChange(buffer);
8051
8052            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8053                    (isFocused() || isSelected() && isShown())) {
8054                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8055                mBeforeText = null;
8056            }
8057        }
8058
8059        public void afterTextChanged(Editable buffer) {
8060            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8061            TextView.this.sendAfterTextChanged(buffer);
8062
8063            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8064                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8065            }
8066        }
8067
8068        public void onSpanChanged(Spannable buf,
8069                                  Object what, int s, int e, int st, int en) {
8070            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8071                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8072            TextView.this.spanChange(buf, what, s, st, e, en);
8073        }
8074
8075        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8076            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8077                    + " what=" + what + ": " + buf);
8078            TextView.this.spanChange(buf, what, -1, s, -1, e);
8079        }
8080
8081        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8082            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8083                    + " what=" + what + ": " + buf);
8084            TextView.this.spanChange(buf, what, s, -1, e, -1);
8085        }
8086
8087        private void hideControllers() {
8088            mEasyEditSpanController.hide();
8089        }
8090    }
8091
8092    /**
8093     * @hide
8094     */
8095    @Override
8096    public void dispatchFinishTemporaryDetach() {
8097        mDispatchTemporaryDetach = true;
8098        super.dispatchFinishTemporaryDetach();
8099        mDispatchTemporaryDetach = false;
8100    }
8101
8102    @Override
8103    public void onStartTemporaryDetach() {
8104        super.onStartTemporaryDetach();
8105        // Only track when onStartTemporaryDetach() is called directly,
8106        // usually because this instance is an editable field in a list
8107        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8108
8109        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8110        // selection becomes visible again. Until a better solution is found, stop text selection
8111        // mode (if any) as soon as this TextView is recycled.
8112        hideControllers();
8113    }
8114
8115    @Override
8116    public void onFinishTemporaryDetach() {
8117        super.onFinishTemporaryDetach();
8118        // Only track when onStartTemporaryDetach() is called directly,
8119        // usually because this instance is an editable field in a list
8120        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8121    }
8122
8123    @Override
8124    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8125        if (mTemporaryDetach) {
8126            // If we are temporarily in the detach state, then do nothing.
8127            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8128            return;
8129        }
8130
8131        mShowCursor = SystemClock.uptimeMillis();
8132
8133        ensureEndedBatchEdit();
8134
8135        if (focused) {
8136            int selStart = getSelectionStart();
8137            int selEnd = getSelectionEnd();
8138
8139            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8140            // mode for these, unless there was a specific selection already started.
8141            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8142                    selEnd == mText.length();
8143            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8144
8145            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8146                // If a tap was used to give focus to that view, move cursor at tap position.
8147                // Has to be done before onTakeFocus, which can be overloaded.
8148                final int lastTapPosition = getLastTapPosition();
8149                if (lastTapPosition >= 0) {
8150                    Selection.setSelection((Spannable) mText, lastTapPosition);
8151                }
8152
8153                if (mMovement != null) {
8154                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8155                }
8156
8157                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8158                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8159                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8160                // This special case ensure that we keep current selection in that case.
8161                // It would be better to know why the DecorView does not have focus at that time.
8162                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8163                        selStart >= 0 && selEnd >= 0) {
8164                    /*
8165                     * Someone intentionally set the selection, so let them
8166                     * do whatever it is that they wanted to do instead of
8167                     * the default on-focus behavior.  We reset the selection
8168                     * here instead of just skipping the onTakeFocus() call
8169                     * because some movement methods do something other than
8170                     * just setting the selection in theirs and we still
8171                     * need to go through that path.
8172                     */
8173                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8174                }
8175
8176                if (mSelectAllOnFocus) {
8177                    selectAll();
8178                }
8179
8180                mTouchFocusSelected = true;
8181            }
8182
8183            mFrozenWithFocus = false;
8184            mSelectionMoved = false;
8185
8186            if (mText instanceof Spannable) {
8187                Spannable sp = (Spannable) mText;
8188                MetaKeyKeyListener.resetMetaState(sp);
8189            }
8190
8191            makeBlink();
8192
8193            if (mError != null) {
8194                showError();
8195            }
8196        } else {
8197            if (mError != null) {
8198                hideError();
8199            }
8200            // Don't leave us in the middle of a batch edit.
8201            onEndBatchEdit();
8202
8203            if (this instanceof ExtractEditText) {
8204                // terminateTextSelectionMode removes selection, which we want to keep when
8205                // ExtractEditText goes out of focus.
8206                final int selStart = getSelectionStart();
8207                final int selEnd = getSelectionEnd();
8208                hideControllers();
8209                Selection.setSelection((Spannable) mText, selStart, selEnd);
8210            } else {
8211                hideControllers();
8212                downgradeEasyCorrectionSpans();
8213            }
8214
8215            // No need to create the controller
8216            if (mSelectionModifierCursorController != null) {
8217                mSelectionModifierCursorController.resetTouchOffsets();
8218            }
8219        }
8220
8221        startStopMarquee(focused);
8222
8223        if (mTransformation != null) {
8224            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8225        }
8226
8227        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8228    }
8229
8230    private int getLastTapPosition() {
8231        // No need to create the controller at that point, no last tap position saved
8232        if (mSelectionModifierCursorController != null) {
8233            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8234            if (lastTapPosition >= 0) {
8235                // Safety check, should not be possible.
8236                if (lastTapPosition > mText.length()) {
8237                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8238                            + mText.length() + ")");
8239                    lastTapPosition = mText.length();
8240                }
8241                return lastTapPosition;
8242            }
8243        }
8244
8245        return -1;
8246    }
8247
8248    @Override
8249    public void onWindowFocusChanged(boolean hasWindowFocus) {
8250        super.onWindowFocusChanged(hasWindowFocus);
8251
8252        if (hasWindowFocus) {
8253            if (mBlink != null) {
8254                mBlink.uncancel();
8255                makeBlink();
8256            }
8257        } else {
8258            if (mBlink != null) {
8259                mBlink.cancel();
8260            }
8261            // Don't leave us in the middle of a batch edit.
8262            onEndBatchEdit();
8263            if (mInputContentType != null) {
8264                mInputContentType.enterDown = false;
8265            }
8266
8267            hideControllers();
8268            if (mSuggestionsPopupWindow != null) {
8269                mSuggestionsPopupWindow.onParentLostFocus();
8270            }
8271        }
8272
8273        startStopMarquee(hasWindowFocus);
8274    }
8275
8276    @Override
8277    protected void onVisibilityChanged(View changedView, int visibility) {
8278        super.onVisibilityChanged(changedView, visibility);
8279        if (visibility != VISIBLE) {
8280            hideControllers();
8281        }
8282    }
8283
8284    /**
8285     * Use {@link BaseInputConnection#removeComposingSpans
8286     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8287     * state from this text view.
8288     */
8289    public void clearComposingText() {
8290        if (mText instanceof Spannable) {
8291            BaseInputConnection.removeComposingSpans((Spannable)mText);
8292        }
8293    }
8294
8295    @Override
8296    public void setSelected(boolean selected) {
8297        boolean wasSelected = isSelected();
8298
8299        super.setSelected(selected);
8300
8301        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8302            if (selected) {
8303                startMarquee();
8304            } else {
8305                stopMarquee();
8306            }
8307        }
8308    }
8309
8310    @Override
8311    public boolean onTouchEvent(MotionEvent event) {
8312        final int action = event.getActionMasked();
8313
8314        if (hasSelectionController()) {
8315            getSelectionController().onTouchEvent(event);
8316        }
8317
8318        if (mShowSuggestionRunnable != null) {
8319            removeCallbacks(mShowSuggestionRunnable);
8320        }
8321
8322        if (action == MotionEvent.ACTION_DOWN) {
8323            mLastDownPositionX = event.getX();
8324            mLastDownPositionY = event.getY();
8325
8326            // Reset this state; it will be re-set if super.onTouchEvent
8327            // causes focus to move to the view.
8328            mTouchFocusSelected = false;
8329            mIgnoreActionUpEvent = false;
8330        }
8331
8332        final boolean superResult = super.onTouchEvent(event);
8333
8334        /*
8335         * Don't handle the release after a long press, because it will
8336         * move the selection away from whatever the menu action was
8337         * trying to affect.
8338         */
8339        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8340            mDiscardNextActionUp = false;
8341            return superResult;
8342        }
8343
8344        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8345                !mIgnoreActionUpEvent && isFocused();
8346
8347         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8348                && mText instanceof Spannable && mLayout != null) {
8349            boolean handled = false;
8350
8351            if (mMovement != null) {
8352                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8353            }
8354
8355            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8356                // The LinkMovementMethod which should handle taps on links has not been installed
8357                // on non editable text that support text selection.
8358                // We reproduce its behavior here to open links for these.
8359                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8360                        getSelectionEnd(), ClickableSpan.class);
8361
8362                if (links.length > 0) {
8363                    links[0].onClick(this);
8364                    handled = true;
8365                }
8366            }
8367
8368            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8369                // Show the IME, except when selecting in read-only text.
8370                final InputMethodManager imm = InputMethodManager.peekInstance();
8371                viewClicked(imm);
8372                if (!mTextIsSelectable) {
8373                    handled |= imm != null && imm.showSoftInput(this, 0);
8374                }
8375
8376                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8377                hideControllers();
8378                if (!selectAllGotFocus && mText.length() > 0) {
8379                    // Move cursor
8380                    final int offset = getOffsetForPosition(event.getX(), event.getY());
8381                    Selection.setSelection((Spannable) mText, offset);
8382                    if (mSpellChecker != null) {
8383                        // When the cursor moves, the word that was typed may need spell check
8384                        mSpellChecker.onSelectionChanged();
8385                    }
8386                    if (!extractedTextModeWillBeStarted()) {
8387                        if (isCursorInsideEasyCorrectionSpan()) {
8388                            if (mShowSuggestionRunnable == null) {
8389                                mShowSuggestionRunnable = new Runnable() {
8390                                    public void run() {
8391                                        showSuggestions();
8392                                    }
8393                                };
8394                            }
8395                            postDelayed(mShowSuggestionRunnable,
8396                                    ViewConfiguration.getDoubleTapTimeout());
8397                        } else if (hasInsertionController()) {
8398                            getInsertionController().show();
8399                        }
8400                    }
8401                }
8402
8403                handled = true;
8404            }
8405
8406            if (handled) {
8407                return true;
8408            }
8409        }
8410
8411        return superResult;
8412    }
8413
8414    /**
8415     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8416     */
8417    private boolean isCursorInsideSuggestionSpan() {
8418        if (!(mText instanceof Spannable)) return false;
8419
8420        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8421                getSelectionEnd(), SuggestionSpan.class);
8422        return (suggestionSpans.length > 0);
8423    }
8424
8425    /**
8426     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8427     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8428     */
8429    private boolean isCursorInsideEasyCorrectionSpan() {
8430        Spannable spannable = (Spannable) mText;
8431        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8432                getSelectionEnd(), SuggestionSpan.class);
8433        for (int i = 0; i < suggestionSpans.length; i++) {
8434            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8435                return true;
8436            }
8437        }
8438        return false;
8439    }
8440
8441    /**
8442     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8443     * span.
8444     */
8445    private void downgradeEasyCorrectionSpans() {
8446        if (mText instanceof Spannable) {
8447            Spannable spannable = (Spannable) mText;
8448            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8449                    spannable.length(), SuggestionSpan.class);
8450            for (int i = 0; i < suggestionSpans.length; i++) {
8451                int flags = suggestionSpans[i].getFlags();
8452                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8453                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8454                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8455                    suggestionSpans[i].setFlags(flags);
8456                }
8457            }
8458        }
8459    }
8460
8461    @Override
8462    public boolean onGenericMotionEvent(MotionEvent event) {
8463        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8464            try {
8465                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8466                    return true;
8467                }
8468            } catch (AbstractMethodError ex) {
8469                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8470                // Ignore its absence in case third party applications implemented the
8471                // interface directly.
8472            }
8473        }
8474        return super.onGenericMotionEvent(event);
8475    }
8476
8477    private void prepareCursorControllers() {
8478        boolean windowSupportsHandles = false;
8479
8480        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8481        if (params instanceof WindowManager.LayoutParams) {
8482            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8483            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8484                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8485        }
8486
8487        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8488        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8489                mLayout != null;
8490
8491        if (!mInsertionControllerEnabled) {
8492            hideInsertionPointCursorController();
8493            if (mInsertionPointCursorController != null) {
8494                mInsertionPointCursorController.onDetached();
8495                mInsertionPointCursorController = null;
8496            }
8497        }
8498
8499        if (!mSelectionControllerEnabled) {
8500            stopSelectionActionMode();
8501            if (mSelectionModifierCursorController != null) {
8502                mSelectionModifierCursorController.onDetached();
8503                mSelectionModifierCursorController = null;
8504            }
8505        }
8506    }
8507
8508    /**
8509     * @return True iff this TextView contains a text that can be edited, or if this is
8510     * a selectable TextView.
8511     */
8512    private boolean isTextEditable() {
8513        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8514    }
8515
8516    /**
8517     * Returns true, only while processing a touch gesture, if the initial
8518     * touch down event caused focus to move to the text view and as a result
8519     * its selection changed.  Only valid while processing the touch gesture
8520     * of interest.
8521     */
8522    public boolean didTouchFocusSelect() {
8523        return mTouchFocusSelected;
8524    }
8525
8526    @Override
8527    public void cancelLongPress() {
8528        super.cancelLongPress();
8529        mIgnoreActionUpEvent = true;
8530    }
8531
8532    @Override
8533    public boolean onTrackballEvent(MotionEvent event) {
8534        if (mMovement != null && mText instanceof Spannable &&
8535            mLayout != null) {
8536            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8537                return true;
8538            }
8539        }
8540
8541        return super.onTrackballEvent(event);
8542    }
8543
8544    public void setScroller(Scroller s) {
8545        mScroller = s;
8546    }
8547
8548    private static class Blink extends Handler implements Runnable {
8549        private final WeakReference<TextView> mView;
8550        private boolean mCancelled;
8551
8552        public Blink(TextView v) {
8553            mView = new WeakReference<TextView>(v);
8554        }
8555
8556        public void run() {
8557            if (mCancelled) {
8558                return;
8559            }
8560
8561            removeCallbacks(Blink.this);
8562
8563            TextView tv = mView.get();
8564
8565            if (tv != null && tv.shouldBlink()) {
8566                if (tv.mLayout != null) {
8567                    tv.invalidateCursorPath();
8568                }
8569
8570                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8571            }
8572        }
8573
8574        void cancel() {
8575            if (!mCancelled) {
8576                removeCallbacks(Blink.this);
8577                mCancelled = true;
8578            }
8579        }
8580
8581        void uncancel() {
8582            mCancelled = false;
8583        }
8584    }
8585
8586    /**
8587     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8588     */
8589    private boolean shouldBlink() {
8590        if (!isCursorVisible() || !isFocused()) return false;
8591
8592        final int start = getSelectionStart();
8593        if (start < 0) return false;
8594
8595        final int end = getSelectionEnd();
8596        if (end < 0) return false;
8597
8598        return start == end;
8599    }
8600
8601    private void makeBlink() {
8602        if (shouldBlink()) {
8603            mShowCursor = SystemClock.uptimeMillis();
8604            if (mBlink == null) mBlink = new Blink(this);
8605            mBlink.removeCallbacks(mBlink);
8606            mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8607        } else {
8608            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8609        }
8610    }
8611
8612    @Override
8613    protected float getLeftFadingEdgeStrength() {
8614        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8615        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8616                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8617            if (mMarquee != null && !mMarquee.isStopped()) {
8618                final Marquee marquee = mMarquee;
8619                if (marquee.shouldDrawLeftFade()) {
8620                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8621                } else {
8622                    return 0.0f;
8623                }
8624            } else if (getLineCount() == 1) {
8625                final int layoutDirection = getResolvedLayoutDirection();
8626                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8627                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8628                    case Gravity.LEFT:
8629                        return 0.0f;
8630                    case Gravity.RIGHT:
8631                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8632                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8633                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8634                    case Gravity.CENTER_HORIZONTAL:
8635                        return 0.0f;
8636                }
8637            }
8638        }
8639        return super.getLeftFadingEdgeStrength();
8640    }
8641
8642    @Override
8643    protected float getRightFadingEdgeStrength() {
8644        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8645        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8646                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8647            if (mMarquee != null && !mMarquee.isStopped()) {
8648                final Marquee marquee = mMarquee;
8649                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8650            } else if (getLineCount() == 1) {
8651                final int layoutDirection = getResolvedLayoutDirection();
8652                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8653                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8654                    case Gravity.LEFT:
8655                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8656                                getCompoundPaddingRight();
8657                        final float lineWidth = mLayout.getLineWidth(0);
8658                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8659                    case Gravity.RIGHT:
8660                        return 0.0f;
8661                    case Gravity.CENTER_HORIZONTAL:
8662                    case Gravity.FILL_HORIZONTAL:
8663                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8664                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8665                                getHorizontalFadingEdgeLength();
8666                }
8667            }
8668        }
8669        return super.getRightFadingEdgeStrength();
8670    }
8671
8672    @Override
8673    protected int computeHorizontalScrollRange() {
8674        if (mLayout != null) {
8675            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8676                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8677        }
8678
8679        return super.computeHorizontalScrollRange();
8680    }
8681
8682    @Override
8683    protected int computeVerticalScrollRange() {
8684        if (mLayout != null)
8685            return mLayout.getHeight();
8686
8687        return super.computeVerticalScrollRange();
8688    }
8689
8690    @Override
8691    protected int computeVerticalScrollExtent() {
8692        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8693    }
8694
8695    @Override
8696    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8697        super.findViewsWithText(outViews, searched, flags);
8698        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8699                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8700            String searchedLowerCase = searched.toString().toLowerCase();
8701            String textLowerCase = mText.toString().toLowerCase();
8702            if (textLowerCase.contains(searchedLowerCase)) {
8703                outViews.add(this);
8704            }
8705        }
8706    }
8707
8708    public enum BufferType {
8709        NORMAL, SPANNABLE, EDITABLE,
8710    }
8711
8712    /**
8713     * Returns the TextView_textColor attribute from the
8714     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8715     * from the TextView_textAppearance attribute, if TextView_textColor
8716     * was not set directly.
8717     */
8718    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8719        ColorStateList colors;
8720        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8721                                         TextView_textColor);
8722
8723        if (colors == null) {
8724            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8725                                         TextView_textAppearance, -1);
8726            if (ap != -1) {
8727                TypedArray appearance;
8728                appearance = context.obtainStyledAttributes(ap,
8729                                            com.android.internal.R.styleable.TextAppearance);
8730                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8731                                                  TextAppearance_textColor);
8732                appearance.recycle();
8733            }
8734        }
8735
8736        return colors;
8737    }
8738
8739    /**
8740     * Returns the default color from the TextView_textColor attribute
8741     * from the AttributeSet, if set, or the default color from the
8742     * TextAppearance_textColor from the TextView_textAppearance attribute,
8743     * if TextView_textColor was not set directly.
8744     */
8745    public static int getTextColor(Context context,
8746                                   TypedArray attrs,
8747                                   int def) {
8748        ColorStateList colors = getTextColors(context, attrs);
8749
8750        if (colors == null) {
8751            return def;
8752        } else {
8753            return colors.getDefaultColor();
8754        }
8755    }
8756
8757    @Override
8758    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8759        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8760        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8761            switch (keyCode) {
8762            case KeyEvent.KEYCODE_A:
8763                if (canSelectText()) {
8764                    return onTextContextMenuItem(ID_SELECT_ALL);
8765                }
8766                break;
8767            case KeyEvent.KEYCODE_X:
8768                if (canCut()) {
8769                    return onTextContextMenuItem(ID_CUT);
8770                }
8771                break;
8772            case KeyEvent.KEYCODE_C:
8773                if (canCopy()) {
8774                    return onTextContextMenuItem(ID_COPY);
8775                }
8776                break;
8777            case KeyEvent.KEYCODE_V:
8778                if (canPaste()) {
8779                    return onTextContextMenuItem(ID_PASTE);
8780                }
8781                break;
8782            }
8783        }
8784        return super.onKeyShortcut(keyCode, event);
8785    }
8786
8787    /**
8788     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8789     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8790     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8791     */
8792    private boolean canSelectText() {
8793        return hasSelectionController() && mText.length() != 0;
8794    }
8795
8796    /**
8797     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8798     * The text must be spannable and the movement method must allow for arbitary selection.
8799     *
8800     * See also {@link #canSelectText()}.
8801     */
8802    private boolean textCanBeSelected() {
8803        // prepareCursorController() relies on this method.
8804        // If you change this condition, make sure prepareCursorController is called anywhere
8805        // the value of this condition might be changed.
8806        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8807        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8808    }
8809
8810    private boolean canCut() {
8811        if (hasPasswordTransformationMethod()) {
8812            return false;
8813        }
8814
8815        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8816            return true;
8817        }
8818
8819        return false;
8820    }
8821
8822    private boolean canCopy() {
8823        if (hasPasswordTransformationMethod()) {
8824            return false;
8825        }
8826
8827        if (mText.length() > 0 && hasSelection()) {
8828            return true;
8829        }
8830
8831        return false;
8832    }
8833
8834    private boolean canPaste() {
8835        return (mText instanceof Editable &&
8836                mInput != null &&
8837                getSelectionStart() >= 0 &&
8838                getSelectionEnd() >= 0 &&
8839                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8840                hasPrimaryClip());
8841    }
8842
8843    private static long packRangeInLong(int start, int end) {
8844        return (((long) start) << 32) | end;
8845    }
8846
8847    private static int extractRangeStartFromLong(long range) {
8848        return (int) (range >>> 32);
8849    }
8850
8851    private static int extractRangeEndFromLong(long range) {
8852        return (int) (range & 0x00000000FFFFFFFFL);
8853    }
8854
8855    private boolean selectAll() {
8856        final int length = mText.length();
8857        Selection.setSelection((Spannable) mText, 0, length);
8858        return length > 0;
8859    }
8860
8861    /**
8862     * Adjusts selection to the word under last touch offset.
8863     * Return true if the operation was successfully performed.
8864     */
8865    private boolean selectCurrentWord() {
8866        if (!canSelectText()) {
8867            return false;
8868        }
8869
8870        if (hasPasswordTransformationMethod()) {
8871            // Always select all on a password field.
8872            // Cut/copy menu entries are not available for passwords, but being able to select all
8873            // is however useful to delete or paste to replace the entire content.
8874            return selectAll();
8875        }
8876
8877        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8878        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8879
8880        // Specific text field types: select the entire text for these
8881        if (klass == InputType.TYPE_CLASS_NUMBER ||
8882                klass == InputType.TYPE_CLASS_PHONE ||
8883                klass == InputType.TYPE_CLASS_DATETIME ||
8884                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8885                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8886                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8887                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8888            return selectAll();
8889        }
8890
8891        long lastTouchOffsets = getLastTouchOffsets();
8892        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8893        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8894
8895        // Safety check in case standard touch event handling has been bypassed
8896        if (minOffset < 0 || minOffset >= mText.length()) return false;
8897        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8898
8899        int selectionStart, selectionEnd;
8900
8901        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8902        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8903        if (urlSpans.length >= 1) {
8904            URLSpan urlSpan = urlSpans[0];
8905            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8906            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8907        } else {
8908            final WordIterator wordIterator = getWordIterator();
8909            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8910
8911            selectionStart = wordIterator.getBeginning(minOffset);
8912            selectionEnd = wordIterator.getEnd(maxOffset);
8913
8914            if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE ||
8915                    selectionStart == selectionEnd) {
8916                // Possible when the word iterator does not properly handle the text's language
8917                long range = getCharRange(minOffset);
8918                selectionStart = extractRangeStartFromLong(range);
8919                selectionEnd = extractRangeEndFromLong(range);
8920            }
8921        }
8922
8923        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8924        return selectionEnd > selectionStart;
8925    }
8926
8927    /**
8928     * This is a temporary method. Future versions may support multi-locale text.
8929     *
8930     * @return The locale that should be used for a word iterator and a spell checker
8931     * in this TextView, based on the current spell checker settings,
8932     * the current IME's locale, or the system default locale.
8933     * @hide
8934     */
8935    public Locale getTextServicesLocale() {
8936        Locale locale = Locale.getDefault();
8937        final TextServicesManager textServicesManager = (TextServicesManager)
8938                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8939        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8940        if (subtype != null) {
8941            locale = new Locale(subtype.getLocale());
8942        }
8943        return locale;
8944    }
8945
8946    void onLocaleChanged() {
8947        // Will be re-created on demand in getWordIterator with the proper new locale
8948        mWordIterator = null;
8949    }
8950
8951    /**
8952     * @hide
8953     */
8954    public WordIterator getWordIterator() {
8955        if (mWordIterator == null) {
8956            mWordIterator = new WordIterator(getTextServicesLocale());
8957        }
8958        return mWordIterator;
8959    }
8960
8961    private long getCharRange(int offset) {
8962        final int textLength = mText.length();
8963        if (offset + 1 < textLength) {
8964            final char currentChar = mText.charAt(offset);
8965            final char nextChar = mText.charAt(offset + 1);
8966            if (Character.isSurrogatePair(currentChar, nextChar)) {
8967                return packRangeInLong(offset,  offset + 2);
8968            }
8969        }
8970        if (offset < textLength) {
8971            return packRangeInLong(offset,  offset + 1);
8972        }
8973        if (offset - 2 >= 0) {
8974            final char previousChar = mText.charAt(offset - 1);
8975            final char previousPreviousChar = mText.charAt(offset - 2);
8976            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8977                return packRangeInLong(offset - 2,  offset);
8978            }
8979        }
8980        if (offset - 1 >= 0) {
8981            return packRangeInLong(offset - 1,  offset);
8982        }
8983        return packRangeInLong(offset,  offset);
8984    }
8985
8986    private long getLastTouchOffsets() {
8987        SelectionModifierCursorController selectionController = getSelectionController();
8988        final int minOffset = selectionController.getMinTouchOffset();
8989        final int maxOffset = selectionController.getMaxTouchOffset();
8990        return packRangeInLong(minOffset, maxOffset);
8991    }
8992
8993    @Override
8994    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8995        super.onPopulateAccessibilityEvent(event);
8996
8997        final boolean isPassword = hasPasswordTransformationMethod();
8998        if (!isPassword) {
8999            CharSequence text = getTextForAccessibility();
9000            if (!TextUtils.isEmpty(text)) {
9001                event.getText().add(text);
9002            }
9003        }
9004    }
9005
9006    @Override
9007    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
9008        super.onInitializeAccessibilityEvent(event);
9009
9010        event.setClassName(TextView.class.getName());
9011        final boolean isPassword = hasPasswordTransformationMethod();
9012        event.setPassword(isPassword);
9013
9014        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9015            event.setFromIndex(Selection.getSelectionStart(mText));
9016            event.setToIndex(Selection.getSelectionEnd(mText));
9017            event.setItemCount(mText.length());
9018        }
9019    }
9020
9021    @Override
9022    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9023        super.onInitializeAccessibilityNodeInfo(info);
9024
9025        info.setClassName(TextView.class.getName());
9026        final boolean isPassword = hasPasswordTransformationMethod();
9027        info.setPassword(isPassword);
9028
9029        if (!isPassword) {
9030            info.setText(getTextForAccessibility());
9031        }
9032    }
9033
9034    @Override
9035    public void sendAccessibilityEvent(int eventType) {
9036        // Do not send scroll events since first they are not interesting for
9037        // accessibility and second such events a generated too frequently.
9038        // For details see the implementation of bringTextIntoView().
9039        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9040            return;
9041        }
9042        super.sendAccessibilityEvent(eventType);
9043    }
9044
9045    /**
9046     * Gets the text reported for accessibility purposes. It is the
9047     * text if not empty or the hint.
9048     *
9049     * @return The accessibility text.
9050     */
9051    private CharSequence getTextForAccessibility() {
9052        CharSequence text = getText();
9053        if (TextUtils.isEmpty(text)) {
9054            text = getHint();
9055        }
9056        return text;
9057    }
9058
9059    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9060            int fromIndex, int removedCount, int addedCount) {
9061        AccessibilityEvent event =
9062            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9063        event.setFromIndex(fromIndex);
9064        event.setRemovedCount(removedCount);
9065        event.setAddedCount(addedCount);
9066        event.setBeforeText(beforeText);
9067        sendAccessibilityEventUnchecked(event);
9068    }
9069
9070    /**
9071     * Returns whether this text view is a current input method target.  The
9072     * default implementation just checks with {@link InputMethodManager}.
9073     */
9074    public boolean isInputMethodTarget() {
9075        InputMethodManager imm = InputMethodManager.peekInstance();
9076        return imm != null && imm.isActive(this);
9077    }
9078
9079    // Selection context mode
9080    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9081    private static final int ID_CUT = android.R.id.cut;
9082    private static final int ID_COPY = android.R.id.copy;
9083    private static final int ID_PASTE = android.R.id.paste;
9084
9085    /**
9086     * Called when a context menu option for the text view is selected.  Currently
9087     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9088     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9089     *
9090     * @return true if the context menu item action was performed.
9091     */
9092    public boolean onTextContextMenuItem(int id) {
9093        int min = 0;
9094        int max = mText.length();
9095
9096        if (isFocused()) {
9097            final int selStart = getSelectionStart();
9098            final int selEnd = getSelectionEnd();
9099
9100            min = Math.max(0, Math.min(selStart, selEnd));
9101            max = Math.max(0, Math.max(selStart, selEnd));
9102        }
9103
9104        switch (id) {
9105            case ID_SELECT_ALL:
9106                // This does not enter text selection mode. Text is highlighted, so that it can be
9107                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9108                selectAll();
9109                return true;
9110
9111            case ID_PASTE:
9112                paste(min, max);
9113                return true;
9114
9115            case ID_CUT:
9116                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9117                deleteText_internal(min, max);
9118                stopSelectionActionMode();
9119                return true;
9120
9121            case ID_COPY:
9122                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9123                stopSelectionActionMode();
9124                return true;
9125        }
9126        return false;
9127    }
9128
9129    private CharSequence getTransformedText(int start, int end) {
9130        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9131    }
9132
9133    /**
9134     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9135     * by [min, max] when replacing this region by paste.
9136     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9137     * make sure we do not add an extra one from the paste content.
9138     */
9139    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9140        if (paste.length() > 0) {
9141            if (min > 0) {
9142                final char charBefore = mTransformed.charAt(min - 1);
9143                final char charAfter = paste.charAt(0);
9144
9145                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9146                    // Two spaces at beginning of paste: remove one
9147                    final int originalLength = mText.length();
9148                    deleteText_internal(min - 1, min);
9149                    // Due to filters, there is no guarantee that exactly one character was
9150                    // removed: count instead.
9151                    final int delta = mText.length() - originalLength;
9152                    min += delta;
9153                    max += delta;
9154                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9155                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9156                    // No space at beginning of paste: add one
9157                    final int originalLength = mText.length();
9158                    replaceText_internal(min, min, " ");
9159                    // Taking possible filters into account as above.
9160                    final int delta = mText.length() - originalLength;
9161                    min += delta;
9162                    max += delta;
9163                }
9164            }
9165
9166            if (max < mText.length()) {
9167                final char charBefore = paste.charAt(paste.length() - 1);
9168                final char charAfter = mTransformed.charAt(max);
9169
9170                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9171                    // Two spaces at end of paste: remove one
9172                    deleteText_internal(max, max + 1);
9173                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9174                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9175                    // No space at end of paste: add one
9176                    replaceText_internal(max, max, " ");
9177                }
9178            }
9179        }
9180
9181        return packRangeInLong(min, max);
9182    }
9183
9184    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9185        TextView shadowView = (TextView) inflate(mContext,
9186                com.android.internal.R.layout.text_drag_thumbnail, null);
9187
9188        if (shadowView == null) {
9189            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9190        }
9191
9192        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9193            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9194        }
9195        shadowView.setText(text);
9196        shadowView.setTextColor(getTextColors());
9197
9198        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9199        shadowView.setGravity(Gravity.CENTER);
9200
9201        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9202                ViewGroup.LayoutParams.WRAP_CONTENT));
9203
9204        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9205        shadowView.measure(size, size);
9206
9207        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9208        shadowView.invalidate();
9209        return new DragShadowBuilder(shadowView);
9210    }
9211
9212    private static class DragLocalState {
9213        public TextView sourceTextView;
9214        public int start, end;
9215
9216        public DragLocalState(TextView sourceTextView, int start, int end) {
9217            this.sourceTextView = sourceTextView;
9218            this.start = start;
9219            this.end = end;
9220        }
9221    }
9222
9223    @Override
9224    public boolean performLongClick() {
9225        boolean handled = false;
9226        boolean vibrate = true;
9227
9228        if (super.performLongClick()) {
9229            handled = true;
9230        }
9231
9232        // Long press in empty space moves cursor and shows the Paste affordance if available.
9233        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9234                mInsertionControllerEnabled) {
9235            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9236            stopSelectionActionMode();
9237            Selection.setSelection((Spannable) mText, offset);
9238            getInsertionController().showWithActionPopup();
9239            handled = true;
9240            vibrate = false;
9241        }
9242
9243        if (!handled && mSelectionActionMode != null) {
9244            if (touchPositionIsInSelection()) {
9245                // Start a drag
9246                final int start = getSelectionStart();
9247                final int end = getSelectionEnd();
9248                CharSequence selectedText = getTransformedText(start, end);
9249                ClipData data = ClipData.newPlainText(null, selectedText);
9250                DragLocalState localState = new DragLocalState(this, start, end);
9251                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9252                stopSelectionActionMode();
9253            } else {
9254                getSelectionController().hide();
9255                selectCurrentWord();
9256                getSelectionController().show();
9257            }
9258            handled = true;
9259        }
9260
9261        // Start a new selection
9262        if (!handled) {
9263            vibrate = handled = startSelectionActionMode();
9264        }
9265
9266        if (vibrate) {
9267            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9268        }
9269
9270        if (handled) {
9271            mDiscardNextActionUp = true;
9272        }
9273
9274        return handled;
9275    }
9276
9277    private boolean touchPositionIsInSelection() {
9278        int selectionStart = getSelectionStart();
9279        int selectionEnd = getSelectionEnd();
9280
9281        if (selectionStart == selectionEnd) {
9282            return false;
9283        }
9284
9285        if (selectionStart > selectionEnd) {
9286            int tmp = selectionStart;
9287            selectionStart = selectionEnd;
9288            selectionEnd = tmp;
9289            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9290        }
9291
9292        SelectionModifierCursorController selectionController = getSelectionController();
9293        int minOffset = selectionController.getMinTouchOffset();
9294        int maxOffset = selectionController.getMaxTouchOffset();
9295
9296        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9297    }
9298
9299    private PositionListener getPositionListener() {
9300        if (mPositionListener == null) {
9301            mPositionListener = new PositionListener();
9302        }
9303        return mPositionListener;
9304    }
9305
9306    private interface TextViewPositionListener {
9307        public void updatePosition(int parentPositionX, int parentPositionY,
9308                boolean parentPositionChanged, boolean parentScrolled);
9309    }
9310
9311    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9312        // 3 handles
9313        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9314        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9315        private TextViewPositionListener[] mPositionListeners =
9316                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9317        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9318        private boolean mPositionHasChanged = true;
9319        // Absolute position of the TextView with respect to its parent window
9320        private int mPositionX, mPositionY;
9321        private int mNumberOfListeners;
9322        private boolean mScrollHasChanged;
9323
9324        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9325            if (mNumberOfListeners == 0) {
9326                updatePosition();
9327                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9328                vto.addOnPreDrawListener(this);
9329            }
9330
9331            int emptySlotIndex = -1;
9332            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9333                TextViewPositionListener listener = mPositionListeners[i];
9334                if (listener == positionListener) {
9335                    return;
9336                } else if (emptySlotIndex < 0 && listener == null) {
9337                    emptySlotIndex = i;
9338                }
9339            }
9340
9341            mPositionListeners[emptySlotIndex] = positionListener;
9342            mCanMove[emptySlotIndex] = canMove;
9343            mNumberOfListeners++;
9344        }
9345
9346        public void removeSubscriber(TextViewPositionListener positionListener) {
9347            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9348                if (mPositionListeners[i] == positionListener) {
9349                    mPositionListeners[i] = null;
9350                    mNumberOfListeners--;
9351                    break;
9352                }
9353            }
9354
9355            if (mNumberOfListeners == 0) {
9356                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9357                vto.removeOnPreDrawListener(this);
9358            }
9359        }
9360
9361        public int getPositionX() {
9362            return mPositionX;
9363        }
9364
9365        public int getPositionY() {
9366            return mPositionY;
9367        }
9368
9369        @Override
9370        public boolean onPreDraw() {
9371            updatePosition();
9372
9373            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9374                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9375                    TextViewPositionListener positionListener = mPositionListeners[i];
9376                    if (positionListener != null) {
9377                        positionListener.updatePosition(mPositionX, mPositionY,
9378                                mPositionHasChanged, mScrollHasChanged);
9379                    }
9380                }
9381            }
9382
9383            mScrollHasChanged = false;
9384            return true;
9385        }
9386
9387        private void updatePosition() {
9388            TextView.this.getLocationInWindow(mTempCoords);
9389
9390            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9391
9392            mPositionX = mTempCoords[0];
9393            mPositionY = mTempCoords[1];
9394        }
9395
9396        public void onScrollChanged() {
9397            mScrollHasChanged = true;
9398        }
9399    }
9400
9401    private boolean isPositionVisible(int positionX, int positionY) {
9402        synchronized (sTmpPosition) {
9403            final float[] position = sTmpPosition;
9404            position[0] = positionX;
9405            position[1] = positionY;
9406            View view = this;
9407
9408            while (view != null) {
9409                if (view != this) {
9410                    // Local scroll is already taken into account in positionX/Y
9411                    position[0] -= view.getScrollX();
9412                    position[1] -= view.getScrollY();
9413                }
9414
9415                if (position[0] < 0 || position[1] < 0 ||
9416                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
9417                    return false;
9418                }
9419
9420                if (!view.getMatrix().isIdentity()) {
9421                    view.getMatrix().mapPoints(position);
9422                }
9423
9424                position[0] += view.getLeft();
9425                position[1] += view.getTop();
9426
9427                final ViewParent parent = view.getParent();
9428                if (parent instanceof View) {
9429                    view = (View) parent;
9430                } else {
9431                    // We've reached the ViewRoot, stop iterating
9432                    view = null;
9433                }
9434            }
9435        }
9436
9437        // We've been able to walk up the view hierarchy and the position was never clipped
9438        return true;
9439    }
9440
9441    private boolean isOffsetVisible(int offset) {
9442        final int line = mLayout.getLineForOffset(offset);
9443        final int lineBottom = mLayout.getLineBottom(line);
9444        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9445        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9446                lineBottom + viewportToContentVerticalOffset());
9447    }
9448
9449    @Override
9450    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9451        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9452        if (mPositionListener != null) {
9453            mPositionListener.onScrollChanged();
9454        }
9455    }
9456
9457    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9458        protected PopupWindow mPopupWindow;
9459        protected ViewGroup mContentView;
9460        int mPositionX, mPositionY;
9461
9462        protected abstract void createPopupWindow();
9463        protected abstract void initContentView();
9464        protected abstract int getTextOffset();
9465        protected abstract int getVerticalLocalPosition(int line);
9466        protected abstract int clipVertically(int positionY);
9467
9468        public PinnedPopupWindow() {
9469            createPopupWindow();
9470
9471            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9472            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9473            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9474
9475            initContentView();
9476
9477            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9478                    ViewGroup.LayoutParams.WRAP_CONTENT);
9479            mContentView.setLayoutParams(wrapContent);
9480
9481            mPopupWindow.setContentView(mContentView);
9482        }
9483
9484        public void show() {
9485            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9486
9487            computeLocalPosition();
9488
9489            final PositionListener positionListener = TextView.this.getPositionListener();
9490            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9491        }
9492
9493        protected void measureContent() {
9494            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9495            mContentView.measure(
9496                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9497                            View.MeasureSpec.AT_MOST),
9498                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9499                            View.MeasureSpec.AT_MOST));
9500        }
9501
9502        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9503         * positioned according to viewportToContentHorizontalOffset.
9504         *
9505         * This method assumes that mContentView has properly been measured from its content. */
9506        private void computeLocalPosition() {
9507            measureContent();
9508            final int width = mContentView.getMeasuredWidth();
9509            final int offset = getTextOffset();
9510            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9511            mPositionX += viewportToContentHorizontalOffset();
9512
9513            final int line = mLayout.getLineForOffset(offset);
9514            mPositionY = getVerticalLocalPosition(line);
9515            mPositionY += viewportToContentVerticalOffset();
9516        }
9517
9518        private void updatePosition(int parentPositionX, int parentPositionY) {
9519            int positionX = parentPositionX + mPositionX;
9520            int positionY = parentPositionY + mPositionY;
9521
9522            positionY = clipVertically(positionY);
9523
9524            // Horizontal clipping
9525            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9526            final int width = mContentView.getMeasuredWidth();
9527            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9528            positionX = Math.max(0, positionX);
9529
9530            if (isShowing()) {
9531                mPopupWindow.update(positionX, positionY, -1, -1);
9532            } else {
9533                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9534                        positionX, positionY);
9535            }
9536        }
9537
9538        public void hide() {
9539            mPopupWindow.dismiss();
9540            TextView.this.getPositionListener().removeSubscriber(this);
9541        }
9542
9543        @Override
9544        public void updatePosition(int parentPositionX, int parentPositionY,
9545                boolean parentPositionChanged, boolean parentScrolled) {
9546            // Either parentPositionChanged or parentScrolled is true, check if still visible
9547            if (isShowing() && isOffsetVisible(getTextOffset())) {
9548                if (parentScrolled) computeLocalPosition();
9549                updatePosition(parentPositionX, parentPositionY);
9550            } else {
9551                hide();
9552            }
9553        }
9554
9555        public boolean isShowing() {
9556            return mPopupWindow.isShowing();
9557        }
9558    }
9559
9560    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9561        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9562        private static final int ADD_TO_DICTIONARY = -1;
9563        private static final int DELETE_TEXT = -2;
9564        private SuggestionInfo[] mSuggestionInfos;
9565        private int mNumberOfSuggestions;
9566        private boolean mCursorWasVisibleBeforeSuggestions;
9567        private boolean mIsShowingUp = false;
9568        private SuggestionAdapter mSuggestionsAdapter;
9569        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9570        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9571
9572        private class CustomPopupWindow extends PopupWindow {
9573            public CustomPopupWindow(Context context, int defStyle) {
9574                super(context, null, defStyle);
9575            }
9576
9577            @Override
9578            public void dismiss() {
9579                super.dismiss();
9580
9581                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9582
9583                // Safe cast since show() checks that mText is an Editable
9584                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9585
9586                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9587                if (hasInsertionController()) {
9588                    getInsertionController().show();
9589                }
9590            }
9591        }
9592
9593        public SuggestionsPopupWindow() {
9594            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9595            mSuggestionSpanComparator = new SuggestionSpanComparator();
9596            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9597        }
9598
9599        @Override
9600        protected void createPopupWindow() {
9601            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9602                com.android.internal.R.attr.textSuggestionsWindowStyle);
9603            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9604            mPopupWindow.setFocusable(true);
9605            mPopupWindow.setClippingEnabled(false);
9606        }
9607
9608        @Override
9609        protected void initContentView() {
9610            ListView listView = new ListView(TextView.this.getContext());
9611            mSuggestionsAdapter = new SuggestionAdapter();
9612            listView.setAdapter(mSuggestionsAdapter);
9613            listView.setOnItemClickListener(this);
9614            mContentView = listView;
9615
9616            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9617            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9618            for (int i = 0; i < mSuggestionInfos.length; i++) {
9619                mSuggestionInfos[i] = new SuggestionInfo();
9620            }
9621        }
9622
9623        public boolean isShowingUp() {
9624            return mIsShowingUp;
9625        }
9626
9627        public void onParentLostFocus() {
9628            mIsShowingUp = false;
9629        }
9630
9631        private class SuggestionInfo {
9632            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9633            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9634            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9635            SpannableStringBuilder text = new SpannableStringBuilder();
9636            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9637                    android.R.style.TextAppearance_SuggestionHighlight);
9638        }
9639
9640        private class SuggestionAdapter extends BaseAdapter {
9641            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9642                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9643
9644            @Override
9645            public int getCount() {
9646                return mNumberOfSuggestions;
9647            }
9648
9649            @Override
9650            public Object getItem(int position) {
9651                return mSuggestionInfos[position];
9652            }
9653
9654            @Override
9655            public long getItemId(int position) {
9656                return position;
9657            }
9658
9659            @Override
9660            public View getView(int position, View convertView, ViewGroup parent) {
9661                TextView textView = (TextView) convertView;
9662
9663                if (textView == null) {
9664                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9665                            false);
9666                }
9667
9668                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9669                textView.setText(suggestionInfo.text);
9670
9671                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9672                    textView.setCompoundDrawablesWithIntrinsicBounds(
9673                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9674                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9675                    textView.setCompoundDrawablesWithIntrinsicBounds(
9676                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9677                } else {
9678                    textView.setCompoundDrawables(null, null, null, null);
9679                }
9680
9681                return textView;
9682            }
9683        }
9684
9685        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9686            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9687                final int flag1 = span1.getFlags();
9688                final int flag2 = span2.getFlags();
9689                if (flag1 != flag2) {
9690                    // The order here should match what is used in updateDrawState
9691                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9692                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9693                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9694                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9695                    if (easy1 && !misspelled1) return -1;
9696                    if (easy2 && !misspelled2) return 1;
9697                    if (misspelled1) return -1;
9698                    if (misspelled2) return 1;
9699                }
9700
9701                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9702            }
9703        }
9704
9705        /**
9706         * Returns the suggestion spans that cover the current cursor position. The suggestion
9707         * spans are sorted according to the length of text that they are attached to.
9708         */
9709        private SuggestionSpan[] getSuggestionSpans() {
9710            int pos = TextView.this.getSelectionStart();
9711            Spannable spannable = (Spannable) TextView.this.mText;
9712            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9713
9714            mSpansLengths.clear();
9715            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9716                int start = spannable.getSpanStart(suggestionSpan);
9717                int end = spannable.getSpanEnd(suggestionSpan);
9718                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9719            }
9720
9721            // The suggestions are sorted according to their types (easy correction first, then
9722            // misspelled) and to the length of the text that they cover (shorter first).
9723            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9724            return suggestionSpans;
9725        }
9726
9727        @Override
9728        public void show() {
9729            if (!(mText instanceof Editable)) return;
9730
9731            if (updateSuggestions()) {
9732                mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9733                setCursorVisible(false);
9734                mIsShowingUp = true;
9735                super.show();
9736            }
9737        }
9738
9739        @Override
9740        protected void measureContent() {
9741            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9742            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9743                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9744            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9745                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9746
9747            int width = 0;
9748            View view = null;
9749            for (int i = 0; i < mNumberOfSuggestions; i++) {
9750                view = mSuggestionsAdapter.getView(i, view, mContentView);
9751                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9752                view.measure(horizontalMeasure, verticalMeasure);
9753                width = Math.max(width, view.getMeasuredWidth());
9754            }
9755
9756            // Enforce the width based on actual text widths
9757            mContentView.measure(
9758                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9759                    verticalMeasure);
9760
9761            Drawable popupBackground = mPopupWindow.getBackground();
9762            if (popupBackground != null) {
9763                if (mTempRect == null) mTempRect = new Rect();
9764                popupBackground.getPadding(mTempRect);
9765                width += mTempRect.left + mTempRect.right;
9766            }
9767            mPopupWindow.setWidth(width);
9768        }
9769
9770        @Override
9771        protected int getTextOffset() {
9772            return getSelectionStart();
9773        }
9774
9775        @Override
9776        protected int getVerticalLocalPosition(int line) {
9777            return mLayout.getLineBottom(line);
9778        }
9779
9780        @Override
9781        protected int clipVertically(int positionY) {
9782            final int height = mContentView.getMeasuredHeight();
9783            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9784            return Math.min(positionY, displayMetrics.heightPixels - height);
9785        }
9786
9787        @Override
9788        public void hide() {
9789            super.hide();
9790        }
9791
9792        private boolean updateSuggestions() {
9793            Spannable spannable = (Spannable) TextView.this.mText;
9794            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9795
9796            final int nbSpans = suggestionSpans.length;
9797            // Suggestions are shown after a delay: the underlying spans may have been removed
9798            if (nbSpans == 0) return false;
9799
9800            mNumberOfSuggestions = 0;
9801            int spanUnionStart = mText.length();
9802            int spanUnionEnd = 0;
9803
9804            SuggestionSpan misspelledSpan = null;
9805            int underlineColor = 0;
9806
9807            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9808                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9809                final int spanStart = spannable.getSpanStart(suggestionSpan);
9810                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9811                spanUnionStart = Math.min(spanStart, spanUnionStart);
9812                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9813
9814                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9815                    misspelledSpan = suggestionSpan;
9816                }
9817
9818                // The first span dictates the background color of the highlighted text
9819                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9820
9821                String[] suggestions = suggestionSpan.getSuggestions();
9822                int nbSuggestions = suggestions.length;
9823                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9824                    String suggestion = suggestions[suggestionIndex];
9825
9826                    boolean suggestionIsDuplicate = false;
9827                    for (int i = 0; i < mNumberOfSuggestions; i++) {
9828                        if (mSuggestionInfos[i].text.toString().equals(suggestion)) {
9829                            SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan;
9830                            final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan);
9831                            final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan);
9832                            if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) {
9833                                suggestionIsDuplicate = true;
9834                                break;
9835                            }
9836                        }
9837                    }
9838
9839                    if (!suggestionIsDuplicate) {
9840                        SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9841                        suggestionInfo.suggestionSpan = suggestionSpan;
9842                        suggestionInfo.suggestionIndex = suggestionIndex;
9843                        suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion);
9844
9845                        mNumberOfSuggestions++;
9846
9847                        if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9848                            // Also end outer for loop
9849                            spanIndex = nbSpans;
9850                            break;
9851                        }
9852                    }
9853                }
9854            }
9855
9856            for (int i = 0; i < mNumberOfSuggestions; i++) {
9857                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9858            }
9859
9860            // Add "Add to dictionary" item if there is a span with the misspelled flag
9861            if (misspelledSpan != null) {
9862                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9863                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9864                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9865                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9866                    suggestionInfo.suggestionSpan = misspelledSpan;
9867                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9868                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9869                            getContext().getString(com.android.internal.R.string.addToDictionary));
9870                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9871                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9872
9873                    mNumberOfSuggestions++;
9874                }
9875            }
9876
9877            // Delete item
9878            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9879            suggestionInfo.suggestionSpan = null;
9880            suggestionInfo.suggestionIndex = DELETE_TEXT;
9881            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9882                    getContext().getString(com.android.internal.R.string.deleteText));
9883            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9884                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9885            mNumberOfSuggestions++;
9886
9887            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9888            if (underlineColor == 0) {
9889                // Fallback on the default highlight color when the first span does not provide one
9890                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9891            } else {
9892                final float BACKGROUND_TRANSPARENCY = 0.4f;
9893                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9894                mSuggestionRangeSpan.setBackgroundColor(
9895                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9896            }
9897            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9898                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9899
9900            mSuggestionsAdapter.notifyDataSetChanged();
9901            return true;
9902        }
9903
9904        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9905                int unionEnd) {
9906            final Spannable text = (Spannable) mText;
9907            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9908            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9909
9910            // Adjust the start/end of the suggestion span
9911            suggestionInfo.suggestionStart = spanStart - unionStart;
9912            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9913                    + suggestionInfo.text.length();
9914
9915            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9916                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9917
9918            // Add the text before and after the span.
9919            final String textAsString = text.toString();
9920            suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart));
9921            suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd));
9922        }
9923
9924        @Override
9925        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9926            Editable editable = (Editable) mText;
9927            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9928
9929            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9930                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9931                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9932                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9933                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9934                    if (spanUnionEnd < editable.length() &&
9935                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9936                            (spanUnionStart == 0 ||
9937                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9938                        spanUnionEnd = spanUnionEnd + 1;
9939                    }
9940                    deleteText_internal(spanUnionStart, spanUnionEnd);
9941                }
9942                hide();
9943                return;
9944            }
9945
9946            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9947            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9948            if (spanStart < 0 || spanEnd <= spanStart) {
9949                // Span has been removed
9950                hide();
9951                return;
9952            }
9953            final String originalText = mText.toString().substring(spanStart, spanEnd);
9954
9955            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9956                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9957                intent.putExtra("word", originalText);
9958                intent.putExtra("locale", getTextServicesLocale().toString());
9959                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9960                getContext().startActivity(intent);
9961                // There is no way to know if the word was indeed added. Re-check.
9962                // TODO The ExtractEditText should remove the span in the original text instead
9963                editable.removeSpan(suggestionInfo.suggestionSpan);
9964                updateSpellCheckSpans(spanStart, spanEnd, false);
9965            } else {
9966                // SuggestionSpans are removed by replace: save them before
9967                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9968                        SuggestionSpan.class);
9969                final int length = suggestionSpans.length;
9970                int[] suggestionSpansStarts = new int[length];
9971                int[] suggestionSpansEnds = new int[length];
9972                int[] suggestionSpansFlags = new int[length];
9973                for (int i = 0; i < length; i++) {
9974                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
9975                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9976                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9977                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9978
9979                    // Remove potential misspelled flags
9980                    int suggestionSpanFlags = suggestionSpan.getFlags();
9981                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9982                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9983                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9984                        suggestionSpan.setFlags(suggestionSpanFlags);
9985                    }
9986                }
9987
9988                final int suggestionStart = suggestionInfo.suggestionStart;
9989                final int suggestionEnd = suggestionInfo.suggestionEnd;
9990                final String suggestion = suggestionInfo.text.subSequence(
9991                        suggestionStart, suggestionEnd).toString();
9992                replaceText_internal(spanStart, spanEnd, suggestion);
9993
9994                // Notify source IME of the suggestion pick. Do this before swaping texts.
9995                if (!TextUtils.isEmpty(
9996                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9997                    InputMethodManager imm = InputMethodManager.peekInstance();
9998                    if (imm != null) {
9999                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
10000                                suggestionInfo.suggestionIndex);
10001                    }
10002                }
10003
10004                // Swap text content between actual text and Suggestion span
10005                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
10006                suggestions[suggestionInfo.suggestionIndex] = originalText;
10007
10008                // Restore previous SuggestionSpans
10009                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
10010                for (int i = 0; i < length; i++) {
10011                    // Only spans that include the modified region make sense after replacement
10012                    // Spans partially included in the replaced region are removed, there is no
10013                    // way to assign them a valid range after replacement
10014                    if (suggestionSpansStarts[i] <= spanStart &&
10015                            suggestionSpansEnds[i] >= spanEnd) {
10016                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
10017                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
10018                    }
10019                }
10020
10021                // Move cursor at the end of the replaced word
10022                final int newCursorPosition = spanEnd + lengthDifference;
10023                setCursorPosition_internal(newCursorPosition, newCursorPosition);
10024            }
10025
10026            hide();
10027        }
10028    }
10029
10030    /**
10031     * Removes the suggestion spans.
10032     */
10033    CharSequence removeSuggestionSpans(CharSequence text) {
10034       if (text instanceof Spanned) {
10035           Spannable spannable;
10036           if (text instanceof Spannable) {
10037               spannable = (Spannable) text;
10038           } else {
10039               spannable = new SpannableString(text);
10040               text = spannable;
10041           }
10042
10043           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10044           for (int i = 0; i < spans.length; i++) {
10045               spannable.removeSpan(spans[i]);
10046           }
10047       }
10048       return text;
10049    }
10050
10051    void showSuggestions() {
10052        if (mSuggestionsPopupWindow == null) {
10053            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10054        }
10055        hideControllers();
10056        mSuggestionsPopupWindow.show();
10057    }
10058
10059    boolean areSuggestionsShown() {
10060        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10061    }
10062
10063    /**
10064     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10065     * by the IME or by the spell checker as the user types. This is done by adding
10066     * {@link SuggestionSpan}s to the text.
10067     *
10068     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10069     * user asks for them on these parts of the text. This value depends on the inputType of this
10070     * TextView.
10071     *
10072     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10073     *
10074     * In addition, the type variation must be one of
10075     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10076     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10077     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10078     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10079     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10080     *
10081     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10082     *
10083     * @return true if the suggestions popup window is enabled, based on the inputType.
10084     */
10085    public boolean isSuggestionsEnabled() {
10086        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10087        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10088
10089        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10090        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10091                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10092                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10093                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10094                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10095    }
10096
10097    /**
10098     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10099     * selection is initiated in this View.
10100     *
10101     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10102     * Paste actions, depending on what this View supports.
10103     *
10104     * A custom implementation can add new entries in the default menu in its
10105     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10106     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10107     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10108     * or {@link android.R.id#paste} ids as parameters.
10109     *
10110     * Returning false from
10111     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10112     * the action mode from being started.
10113     *
10114     * Action click events should be handled by the custom implementation of
10115     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10116     *
10117     * Note that text selection mode is not started when a TextView receives focus and the
10118     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10119     * that case, to allow for quick replacement.
10120     */
10121    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10122        mCustomSelectionActionModeCallback = actionModeCallback;
10123    }
10124
10125    /**
10126     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10127     *
10128     * @return The current custom selection callback.
10129     */
10130    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10131        return mCustomSelectionActionModeCallback;
10132    }
10133
10134    /**
10135     *
10136     * @return true if the selection mode was actually started.
10137     */
10138    private boolean startSelectionActionMode() {
10139        if (mSelectionActionMode != null) {
10140            // Selection action mode is already started
10141            return false;
10142        }
10143
10144        if (!canSelectText() || !requestFocus()) {
10145            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10146            return false;
10147        }
10148
10149        if (!hasSelection()) {
10150            // There may already be a selection on device rotation
10151            if (!selectCurrentWord()) {
10152                // No word found under cursor or text selection not permitted.
10153                return false;
10154            }
10155        }
10156
10157        boolean willExtract = extractedTextModeWillBeStarted();
10158
10159        // Do not start the action mode when extracted text will show up full screen, which would
10160        // immediately hide the newly created action bar and would be visually distracting.
10161        if (!willExtract) {
10162            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10163            mSelectionActionMode = startActionMode(actionModeCallback);
10164        }
10165
10166        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10167        if (selectionStarted && !mTextIsSelectable) {
10168            // Show the IME to be able to replace text, except when selecting non editable text.
10169            final InputMethodManager imm = InputMethodManager.peekInstance();
10170            if (imm != null) {
10171                imm.showSoftInput(this, 0, null);
10172            }
10173        }
10174
10175        return selectionStarted;
10176    }
10177
10178    private boolean extractedTextModeWillBeStarted() {
10179        if (!(this instanceof ExtractEditText)) {
10180            final InputMethodManager imm = InputMethodManager.peekInstance();
10181            return  imm != null && imm.isFullscreenMode();
10182        }
10183        return false;
10184    }
10185
10186    /**
10187     * @hide
10188     */
10189    protected void stopSelectionActionMode() {
10190        if (mSelectionActionMode != null) {
10191            // This will hide the mSelectionModifierCursorController
10192            mSelectionActionMode.finish();
10193        }
10194    }
10195
10196    /**
10197     * Paste clipboard content between min and max positions.
10198     */
10199    private void paste(int min, int max) {
10200        ClipboardManager clipboard =
10201            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10202        ClipData clip = clipboard.getPrimaryClip();
10203        if (clip != null) {
10204            boolean didFirst = false;
10205            for (int i=0; i<clip.getItemCount(); i++) {
10206                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10207                if (paste != null) {
10208                    if (!didFirst) {
10209                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10210                        min = extractRangeStartFromLong(minMax);
10211                        max = extractRangeEndFromLong(minMax);
10212                        Selection.setSelection((Spannable) mText, max);
10213                        ((Editable) mText).replace(min, max, paste);
10214                        didFirst = true;
10215                    } else {
10216                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10217                        ((Editable) mText).insert(getSelectionEnd(), paste);
10218                    }
10219                }
10220            }
10221            stopSelectionActionMode();
10222            sLastCutOrCopyTime = 0;
10223        }
10224    }
10225
10226    private void setPrimaryClip(ClipData clip) {
10227        ClipboardManager clipboard = (ClipboardManager) getContext().
10228                getSystemService(Context.CLIPBOARD_SERVICE);
10229        clipboard.setPrimaryClip(clip);
10230        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10231    }
10232
10233    /**
10234     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10235     *
10236     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10237     * on which of these this TextView supports.
10238     */
10239    private class SelectionActionModeCallback implements ActionMode.Callback {
10240
10241        @Override
10242        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10243            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10244                    com.android.internal.R.styleable.SelectionModeDrawables);
10245
10246            boolean allowText = getContext().getResources().getBoolean(
10247                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10248
10249            mode.setTitle(allowText ?
10250                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10251            mode.setSubtitle(null);
10252
10253            int selectAllIconId = 0; // No icon by default
10254            if (!allowText) {
10255                // Provide an icon, text will not be displayed on smaller screens.
10256                selectAllIconId = styledAttributes.getResourceId(
10257                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10258            }
10259
10260            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10261                    setIcon(selectAllIconId).
10262                    setAlphabeticShortcut('a').
10263                    setShowAsAction(
10264                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10265
10266            if (canCut()) {
10267                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10268                    setIcon(styledAttributes.getResourceId(
10269                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10270                    setAlphabeticShortcut('x').
10271                    setShowAsAction(
10272                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10273            }
10274
10275            if (canCopy()) {
10276                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10277                    setIcon(styledAttributes.getResourceId(
10278                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10279                    setAlphabeticShortcut('c').
10280                    setShowAsAction(
10281                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10282            }
10283
10284            if (canPaste()) {
10285                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10286                        setIcon(styledAttributes.getResourceId(
10287                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10288                        setAlphabeticShortcut('v').
10289                        setShowAsAction(
10290                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10291            }
10292
10293            styledAttributes.recycle();
10294
10295            if (mCustomSelectionActionModeCallback != null) {
10296                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10297                    // The custom mode can choose to cancel the action mode
10298                    return false;
10299                }
10300            }
10301
10302            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10303                getSelectionController().show();
10304                return true;
10305            } else {
10306                return false;
10307            }
10308        }
10309
10310        @Override
10311        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10312            if (mCustomSelectionActionModeCallback != null) {
10313                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10314            }
10315            return true;
10316        }
10317
10318        @Override
10319        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10320            if (mCustomSelectionActionModeCallback != null &&
10321                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10322                return true;
10323            }
10324            return onTextContextMenuItem(item.getItemId());
10325        }
10326
10327        @Override
10328        public void onDestroyActionMode(ActionMode mode) {
10329            if (mCustomSelectionActionModeCallback != null) {
10330                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10331            }
10332            Selection.setSelection((Spannable) mText, getSelectionEnd());
10333
10334            if (mSelectionModifierCursorController != null) {
10335                mSelectionModifierCursorController.hide();
10336            }
10337
10338            mSelectionActionMode = null;
10339        }
10340    }
10341
10342    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10343        private static final int POPUP_TEXT_LAYOUT =
10344                com.android.internal.R.layout.text_edit_action_popup_text;
10345        private TextView mPasteTextView;
10346        private TextView mReplaceTextView;
10347
10348        @Override
10349        protected void createPopupWindow() {
10350            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10351                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10352            mPopupWindow.setClippingEnabled(true);
10353        }
10354
10355        @Override
10356        protected void initContentView() {
10357            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10358            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10359            mContentView = linearLayout;
10360            mContentView.setBackgroundResource(
10361                    com.android.internal.R.drawable.text_edit_paste_window);
10362
10363            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10364                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10365
10366            LayoutParams wrapContent = new LayoutParams(
10367                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10368
10369            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10370            mPasteTextView.setLayoutParams(wrapContent);
10371            mContentView.addView(mPasteTextView);
10372            mPasteTextView.setText(com.android.internal.R.string.paste);
10373            mPasteTextView.setOnClickListener(this);
10374
10375            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10376            mReplaceTextView.setLayoutParams(wrapContent);
10377            mContentView.addView(mReplaceTextView);
10378            mReplaceTextView.setText(com.android.internal.R.string.replace);
10379            mReplaceTextView.setOnClickListener(this);
10380        }
10381
10382        @Override
10383        public void show() {
10384            boolean canPaste = canPaste();
10385            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10386            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10387            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10388
10389            if (!canPaste && !canSuggest) return;
10390
10391            super.show();
10392        }
10393
10394        @Override
10395        public void onClick(View view) {
10396            if (view == mPasteTextView && canPaste()) {
10397                onTextContextMenuItem(ID_PASTE);
10398                hide();
10399            } else if (view == mReplaceTextView) {
10400                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10401                stopSelectionActionMode();
10402                Selection.setSelection((Spannable) mText, middle);
10403                showSuggestions();
10404            }
10405        }
10406
10407        @Override
10408        protected int getTextOffset() {
10409            return (getSelectionStart() + getSelectionEnd()) / 2;
10410        }
10411
10412        @Override
10413        protected int getVerticalLocalPosition(int line) {
10414            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10415        }
10416
10417        @Override
10418        protected int clipVertically(int positionY) {
10419            if (positionY < 0) {
10420                final int offset = getTextOffset();
10421                final int line = mLayout.getLineForOffset(offset);
10422                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10423                positionY += mContentView.getMeasuredHeight();
10424
10425                // Assumes insertion and selection handles share the same height
10426                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10427                positionY += handle.getIntrinsicHeight();
10428            }
10429
10430            return positionY;
10431        }
10432    }
10433
10434    private abstract class HandleView extends View implements TextViewPositionListener {
10435        protected Drawable mDrawable;
10436        protected Drawable mDrawableLtr;
10437        protected Drawable mDrawableRtl;
10438        private final PopupWindow mContainer;
10439        // Position with respect to the parent TextView
10440        private int mPositionX, mPositionY;
10441        private boolean mIsDragging;
10442        // Offset from touch position to mPosition
10443        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10444        protected int mHotspotX;
10445        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10446        private float mTouchOffsetY;
10447        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10448        private float mIdealVerticalOffset;
10449        // Parent's (TextView) previous position in window
10450        private int mLastParentX, mLastParentY;
10451        // Transient action popup window for Paste and Replace actions
10452        protected ActionPopupWindow mActionPopupWindow;
10453        // Previous text character offset
10454        private int mPreviousOffset = -1;
10455        // Previous text character offset
10456        private boolean mPositionHasChanged = true;
10457        // Used to delay the appearance of the action popup window
10458        private Runnable mActionPopupShower;
10459
10460        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10461            super(TextView.this.mContext);
10462            mContainer = new PopupWindow(TextView.this.mContext, null,
10463                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10464            mContainer.setSplitTouchEnabled(true);
10465            mContainer.setClippingEnabled(false);
10466            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10467            mContainer.setContentView(this);
10468
10469            mDrawableLtr = drawableLtr;
10470            mDrawableRtl = drawableRtl;
10471
10472            updateDrawable();
10473
10474            final int handleHeight = mDrawable.getIntrinsicHeight();
10475            mTouchOffsetY = -0.3f * handleHeight;
10476            mIdealVerticalOffset = 0.7f * handleHeight;
10477        }
10478
10479        protected void updateDrawable() {
10480            final int offset = getCurrentCursorOffset();
10481            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10482            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10483            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10484        }
10485
10486        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10487
10488        // Touch-up filter: number of previous positions remembered
10489        private static final int HISTORY_SIZE = 5;
10490        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10491        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10492        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10493        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10494        private int mPreviousOffsetIndex = 0;
10495        private int mNumberPreviousOffsets = 0;
10496
10497        private void startTouchUpFilter(int offset) {
10498            mNumberPreviousOffsets = 0;
10499            addPositionToTouchUpFilter(offset);
10500        }
10501
10502        private void addPositionToTouchUpFilter(int offset) {
10503            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10504            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10505            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10506            mNumberPreviousOffsets++;
10507        }
10508
10509        private void filterOnTouchUp() {
10510            final long now = SystemClock.uptimeMillis();
10511            int i = 0;
10512            int index = mPreviousOffsetIndex;
10513            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10514            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10515                i++;
10516                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10517            }
10518
10519            if (i > 0 && i < iMax &&
10520                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10521                positionAtCursorOffset(mPreviousOffsets[index], false);
10522            }
10523        }
10524
10525        public boolean offsetHasBeenChanged() {
10526            return mNumberPreviousOffsets > 1;
10527        }
10528
10529        @Override
10530        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10531            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10532        }
10533
10534        public void show() {
10535            if (isShowing()) return;
10536
10537            getPositionListener().addSubscriber(this, true /* local position may change */);
10538
10539            // Make sure the offset is always considered new, even when focusing at same position
10540            mPreviousOffset = -1;
10541            positionAtCursorOffset(getCurrentCursorOffset(), false);
10542
10543            hideActionPopupWindow();
10544        }
10545
10546        protected void dismiss() {
10547            mIsDragging = false;
10548            mContainer.dismiss();
10549            onDetached();
10550        }
10551
10552        public void hide() {
10553            dismiss();
10554
10555            TextView.this.getPositionListener().removeSubscriber(this);
10556        }
10557
10558        void showActionPopupWindow(int delay) {
10559            if (mActionPopupWindow == null) {
10560                mActionPopupWindow = new ActionPopupWindow();
10561            }
10562            if (mActionPopupShower == null) {
10563                mActionPopupShower = new Runnable() {
10564                    public void run() {
10565                        mActionPopupWindow.show();
10566                    }
10567                };
10568            } else {
10569                TextView.this.removeCallbacks(mActionPopupShower);
10570            }
10571            TextView.this.postDelayed(mActionPopupShower, delay);
10572        }
10573
10574        protected void hideActionPopupWindow() {
10575            if (mActionPopupShower != null) {
10576                TextView.this.removeCallbacks(mActionPopupShower);
10577            }
10578            if (mActionPopupWindow != null) {
10579                mActionPopupWindow.hide();
10580            }
10581        }
10582
10583        public boolean isShowing() {
10584            return mContainer.isShowing();
10585        }
10586
10587        private boolean isVisible() {
10588            // Always show a dragging handle.
10589            if (mIsDragging) {
10590                return true;
10591            }
10592
10593            if (isInBatchEditMode()) {
10594                return false;
10595            }
10596
10597            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10598        }
10599
10600        public abstract int getCurrentCursorOffset();
10601
10602        protected abstract void updateSelection(int offset);
10603
10604        public abstract void updatePosition(float x, float y);
10605
10606        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10607            // A HandleView relies on the layout, which may be nulled by external methods
10608            if (mLayout == null) {
10609                // Will update controllers' state, hiding them and stopping selection mode if needed
10610                prepareCursorControllers();
10611                return;
10612            }
10613
10614            if (offset != mPreviousOffset || parentScrolled) {
10615                updateSelection(offset);
10616                addPositionToTouchUpFilter(offset);
10617                final int line = mLayout.getLineForOffset(offset);
10618
10619                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10620                mPositionY = mLayout.getLineBottom(line);
10621
10622                // Take TextView's padding and scroll into account.
10623                mPositionX += viewportToContentHorizontalOffset();
10624                mPositionY += viewportToContentVerticalOffset();
10625
10626                mPreviousOffset = offset;
10627                mPositionHasChanged = true;
10628            }
10629        }
10630
10631        public void updatePosition(int parentPositionX, int parentPositionY,
10632                boolean parentPositionChanged, boolean parentScrolled) {
10633            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10634            if (parentPositionChanged || mPositionHasChanged) {
10635                if (mIsDragging) {
10636                    // Update touchToWindow offset in case of parent scrolling while dragging
10637                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10638                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10639                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10640                        mLastParentX = parentPositionX;
10641                        mLastParentY = parentPositionY;
10642                    }
10643
10644                    onHandleMoved();
10645                }
10646
10647                if (isVisible()) {
10648                    final int positionX = parentPositionX + mPositionX;
10649                    final int positionY = parentPositionY + mPositionY;
10650                    if (isShowing()) {
10651                        mContainer.update(positionX, positionY, -1, -1);
10652                    } else {
10653                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10654                                positionX, positionY);
10655                    }
10656                } else {
10657                    if (isShowing()) {
10658                        dismiss();
10659                    }
10660                }
10661
10662                mPositionHasChanged = false;
10663            }
10664        }
10665
10666        @Override
10667        protected void onDraw(Canvas c) {
10668            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10669            mDrawable.draw(c);
10670        }
10671
10672        @Override
10673        public boolean onTouchEvent(MotionEvent ev) {
10674            switch (ev.getActionMasked()) {
10675                case MotionEvent.ACTION_DOWN: {
10676                    startTouchUpFilter(getCurrentCursorOffset());
10677                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10678                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10679
10680                    final PositionListener positionListener = getPositionListener();
10681                    mLastParentX = positionListener.getPositionX();
10682                    mLastParentY = positionListener.getPositionY();
10683                    mIsDragging = true;
10684                    break;
10685                }
10686
10687                case MotionEvent.ACTION_MOVE: {
10688                    final float rawX = ev.getRawX();
10689                    final float rawY = ev.getRawY();
10690
10691                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10692                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10693                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10694                    float newVerticalOffset;
10695                    if (previousVerticalOffset < mIdealVerticalOffset) {
10696                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10697                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10698                    } else {
10699                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10700                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10701                    }
10702                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10703
10704                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10705                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10706
10707                    updatePosition(newPosX, newPosY);
10708                    break;
10709                }
10710
10711                case MotionEvent.ACTION_UP:
10712                    filterOnTouchUp();
10713                    mIsDragging = false;
10714                    break;
10715
10716                case MotionEvent.ACTION_CANCEL:
10717                    mIsDragging = false;
10718                    break;
10719            }
10720            return true;
10721        }
10722
10723        public boolean isDragging() {
10724            return mIsDragging;
10725        }
10726
10727        void onHandleMoved() {
10728            hideActionPopupWindow();
10729        }
10730
10731        public void onDetached() {
10732            hideActionPopupWindow();
10733        }
10734    }
10735
10736    private class InsertionHandleView extends HandleView {
10737        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10738        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10739
10740        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10741        private float mDownPositionX, mDownPositionY;
10742        private Runnable mHider;
10743
10744        public InsertionHandleView(Drawable drawable) {
10745            super(drawable, drawable);
10746        }
10747
10748        @Override
10749        public void show() {
10750            super.show();
10751
10752            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10753            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10754                showActionPopupWindow(0);
10755            }
10756
10757            hideAfterDelay();
10758        }
10759
10760        public void showWithActionPopup() {
10761            show();
10762            showActionPopupWindow(0);
10763        }
10764
10765        private void hideAfterDelay() {
10766            removeHiderCallback();
10767            if (mHider == null) {
10768                mHider = new Runnable() {
10769                    public void run() {
10770                        hide();
10771                    }
10772                };
10773            }
10774            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10775        }
10776
10777        private void removeHiderCallback() {
10778            if (mHider != null) {
10779                TextView.this.removeCallbacks(mHider);
10780            }
10781        }
10782
10783        @Override
10784        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10785            return drawable.getIntrinsicWidth() / 2;
10786        }
10787
10788        @Override
10789        public boolean onTouchEvent(MotionEvent ev) {
10790            final boolean result = super.onTouchEvent(ev);
10791
10792            switch (ev.getActionMasked()) {
10793                case MotionEvent.ACTION_DOWN:
10794                    mDownPositionX = ev.getRawX();
10795                    mDownPositionY = ev.getRawY();
10796                    break;
10797
10798                case MotionEvent.ACTION_UP:
10799                    if (!offsetHasBeenChanged()) {
10800                        final float deltaX = mDownPositionX - ev.getRawX();
10801                        final float deltaY = mDownPositionY - ev.getRawY();
10802                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10803
10804                        final ViewConfiguration viewConfiguration = ViewConfiguration.get(
10805                                TextView.this.getContext());
10806                        final int touchSlop = viewConfiguration.getScaledTouchSlop();
10807
10808                        if (distanceSquared < touchSlop * touchSlop) {
10809                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10810                                // Tapping on the handle dismisses the displayed action popup
10811                                mActionPopupWindow.hide();
10812                            } else {
10813                                showWithActionPopup();
10814                            }
10815                        }
10816                    }
10817                    hideAfterDelay();
10818                    break;
10819
10820                case MotionEvent.ACTION_CANCEL:
10821                    hideAfterDelay();
10822                    break;
10823
10824                default:
10825                    break;
10826            }
10827
10828            return result;
10829        }
10830
10831        @Override
10832        public int getCurrentCursorOffset() {
10833            return TextView.this.getSelectionStart();
10834        }
10835
10836        @Override
10837        public void updateSelection(int offset) {
10838            Selection.setSelection((Spannable) mText, offset);
10839        }
10840
10841        @Override
10842        public void updatePosition(float x, float y) {
10843            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10844        }
10845
10846        @Override
10847        void onHandleMoved() {
10848            super.onHandleMoved();
10849            removeHiderCallback();
10850        }
10851
10852        @Override
10853        public void onDetached() {
10854            super.onDetached();
10855            removeHiderCallback();
10856        }
10857    }
10858
10859    private class SelectionStartHandleView extends HandleView {
10860
10861        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10862            super(drawableLtr, drawableRtl);
10863        }
10864
10865        @Override
10866        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10867            if (isRtlRun) {
10868                return drawable.getIntrinsicWidth() / 4;
10869            } else {
10870                return (drawable.getIntrinsicWidth() * 3) / 4;
10871            }
10872        }
10873
10874        @Override
10875        public int getCurrentCursorOffset() {
10876            return TextView.this.getSelectionStart();
10877        }
10878
10879        @Override
10880        public void updateSelection(int offset) {
10881            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10882            updateDrawable();
10883        }
10884
10885        @Override
10886        public void updatePosition(float x, float y) {
10887            int offset = getOffsetForPosition(x, y);
10888
10889            // Handles can not cross and selection is at least one character
10890            final int selectionEnd = getSelectionEnd();
10891            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10892
10893            positionAtCursorOffset(offset, false);
10894        }
10895
10896        public ActionPopupWindow getActionPopupWindow() {
10897            return mActionPopupWindow;
10898        }
10899    }
10900
10901    private class SelectionEndHandleView extends HandleView {
10902
10903        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10904            super(drawableLtr, drawableRtl);
10905        }
10906
10907        @Override
10908        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10909            if (isRtlRun) {
10910                return (drawable.getIntrinsicWidth() * 3) / 4;
10911            } else {
10912                return drawable.getIntrinsicWidth() / 4;
10913            }
10914        }
10915
10916        @Override
10917        public int getCurrentCursorOffset() {
10918            return TextView.this.getSelectionEnd();
10919        }
10920
10921        @Override
10922        public void updateSelection(int offset) {
10923            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10924            updateDrawable();
10925        }
10926
10927        @Override
10928        public void updatePosition(float x, float y) {
10929            int offset = getOffsetForPosition(x, y);
10930
10931            // Handles can not cross and selection is at least one character
10932            final int selectionStart = getSelectionStart();
10933            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10934
10935            positionAtCursorOffset(offset, false);
10936        }
10937
10938        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10939            mActionPopupWindow = actionPopupWindow;
10940        }
10941    }
10942
10943    /**
10944     * A CursorController instance can be used to control a cursor in the text.
10945     * It is not used outside of {@link TextView}.
10946     * @hide
10947     */
10948    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10949        /**
10950         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10951         * See also {@link #hide()}.
10952         */
10953        public void show();
10954
10955        /**
10956         * Hide the cursor controller from screen.
10957         * See also {@link #show()}.
10958         */
10959        public void hide();
10960
10961        /**
10962         * Called when the view is detached from window. Perform house keeping task, such as
10963         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10964         * preventing the activity from being recycled.
10965         */
10966        public void onDetached();
10967    }
10968
10969    private class InsertionPointCursorController implements CursorController {
10970        private InsertionHandleView mHandle;
10971
10972        public void show() {
10973            getHandle().show();
10974        }
10975
10976        public void showWithActionPopup() {
10977            getHandle().showWithActionPopup();
10978        }
10979
10980        public void hide() {
10981            if (mHandle != null) {
10982                mHandle.hide();
10983            }
10984        }
10985
10986        public void onTouchModeChanged(boolean isInTouchMode) {
10987            if (!isInTouchMode) {
10988                hide();
10989            }
10990        }
10991
10992        private InsertionHandleView getHandle() {
10993            if (mSelectHandleCenter == null) {
10994                mSelectHandleCenter = mContext.getResources().getDrawable(
10995                        mTextSelectHandleRes);
10996            }
10997            if (mHandle == null) {
10998                mHandle = new InsertionHandleView(mSelectHandleCenter);
10999            }
11000            return mHandle;
11001        }
11002
11003        @Override
11004        public void onDetached() {
11005            final ViewTreeObserver observer = getViewTreeObserver();
11006            observer.removeOnTouchModeChangeListener(this);
11007
11008            if (mHandle != null) mHandle.onDetached();
11009        }
11010    }
11011
11012    private class SelectionModifierCursorController implements CursorController {
11013        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
11014        // The cursor controller handles, lazily created when shown.
11015        private SelectionStartHandleView mStartHandle;
11016        private SelectionEndHandleView mEndHandle;
11017        // The offsets of that last touch down event. Remembered to start selection there.
11018        private int mMinTouchOffset, mMaxTouchOffset;
11019
11020        // Double tap detection
11021        private long mPreviousTapUpTime = 0;
11022        private float mDownPositionX, mDownPositionY;
11023        private boolean mGestureStayedInTapRegion;
11024
11025        SelectionModifierCursorController() {
11026            resetTouchOffsets();
11027        }
11028
11029        public void show() {
11030            if (isInBatchEditMode()) {
11031                return;
11032            }
11033            initDrawables();
11034            initHandles();
11035            hideInsertionPointCursorController();
11036        }
11037
11038        private void initDrawables() {
11039            if (mSelectHandleLeft == null) {
11040                mSelectHandleLeft = mContext.getResources().getDrawable(
11041                        mTextSelectHandleLeftRes);
11042            }
11043            if (mSelectHandleRight == null) {
11044                mSelectHandleRight = mContext.getResources().getDrawable(
11045                        mTextSelectHandleRightRes);
11046            }
11047        }
11048
11049        private void initHandles() {
11050            // Lazy object creation has to be done before updatePosition() is called.
11051            if (mStartHandle == null) {
11052                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11053            }
11054            if (mEndHandle == null) {
11055                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11056            }
11057
11058            mStartHandle.show();
11059            mEndHandle.show();
11060
11061            // Make sure both left and right handles share the same ActionPopupWindow (so that
11062            // moving any of the handles hides the action popup).
11063            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11064            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11065
11066            hideInsertionPointCursorController();
11067        }
11068
11069        public void hide() {
11070            if (mStartHandle != null) mStartHandle.hide();
11071            if (mEndHandle != null) mEndHandle.hide();
11072        }
11073
11074        public void onTouchEvent(MotionEvent event) {
11075            // This is done even when the View does not have focus, so that long presses can start
11076            // selection and tap can move cursor from this tap position.
11077            switch (event.getActionMasked()) {
11078                case MotionEvent.ACTION_DOWN:
11079                    final float x = event.getX();
11080                    final float y = event.getY();
11081
11082                    // Remember finger down position, to be able to start selection from there
11083                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11084
11085                    // Double tap detection
11086                    if (mGestureStayedInTapRegion) {
11087                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11088                        if (duration <= ViewConfiguration.getDoubleTapTimeout()) {
11089                            final float deltaX = x - mDownPositionX;
11090                            final float deltaY = y - mDownPositionY;
11091                            final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11092
11093                            ViewConfiguration viewConfiguration = ViewConfiguration.get(
11094                                    TextView.this.getContext());
11095                            int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop();
11096                            boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop;
11097
11098                            if (stayedInArea && isPositionOnText(x, y)) {
11099                                startSelectionActionMode();
11100                                mDiscardNextActionUp = true;
11101                            }
11102                        }
11103                    }
11104
11105                    mDownPositionX = x;
11106                    mDownPositionY = y;
11107                    mGestureStayedInTapRegion = true;
11108                    break;
11109
11110                case MotionEvent.ACTION_POINTER_DOWN:
11111                case MotionEvent.ACTION_POINTER_UP:
11112                    // Handle multi-point gestures. Keep min and max offset positions.
11113                    // Only activated for devices that correctly handle multi-touch.
11114                    if (mContext.getPackageManager().hasSystemFeature(
11115                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11116                        updateMinAndMaxOffsets(event);
11117                    }
11118                    break;
11119
11120                case MotionEvent.ACTION_MOVE:
11121                    if (mGestureStayedInTapRegion) {
11122                        final float deltaX = event.getX() - mDownPositionX;
11123                        final float deltaY = event.getY() - mDownPositionY;
11124                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11125
11126                        final ViewConfiguration viewConfiguration = ViewConfiguration.get(
11127                                TextView.this.getContext());
11128                        int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop();
11129
11130                        if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) {
11131                            mGestureStayedInTapRegion = false;
11132                        }
11133                    }
11134                    break;
11135
11136                case MotionEvent.ACTION_UP:
11137                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11138                    break;
11139            }
11140        }
11141
11142        /**
11143         * @param event
11144         */
11145        private void updateMinAndMaxOffsets(MotionEvent event) {
11146            int pointerCount = event.getPointerCount();
11147            for (int index = 0; index < pointerCount; index++) {
11148                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11149                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11150                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11151            }
11152        }
11153
11154        public int getMinTouchOffset() {
11155            return mMinTouchOffset;
11156        }
11157
11158        public int getMaxTouchOffset() {
11159            return mMaxTouchOffset;
11160        }
11161
11162        public void resetTouchOffsets() {
11163            mMinTouchOffset = mMaxTouchOffset = -1;
11164        }
11165
11166        /**
11167         * @return true iff this controller is currently used to move the selection start.
11168         */
11169        public boolean isSelectionStartDragged() {
11170            return mStartHandle != null && mStartHandle.isDragging();
11171        }
11172
11173        public void onTouchModeChanged(boolean isInTouchMode) {
11174            if (!isInTouchMode) {
11175                hide();
11176            }
11177        }
11178
11179        @Override
11180        public void onDetached() {
11181            final ViewTreeObserver observer = getViewTreeObserver();
11182            observer.removeOnTouchModeChangeListener(this);
11183
11184            if (mStartHandle != null) mStartHandle.onDetached();
11185            if (mEndHandle != null) mEndHandle.onDetached();
11186        }
11187    }
11188
11189    private void hideInsertionPointCursorController() {
11190        // No need to create the controller to hide it.
11191        if (mInsertionPointCursorController != null) {
11192            mInsertionPointCursorController.hide();
11193        }
11194    }
11195
11196    /**
11197     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11198     */
11199    private void hideControllers() {
11200        hideCursorControllers();
11201        hideSpanControllers();
11202    }
11203
11204    private void hideSpanControllers() {
11205        if (mChangeWatcher != null) {
11206            mChangeWatcher.hideControllers();
11207        }
11208    }
11209
11210    private void hideCursorControllers() {
11211        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11212            // Should be done before hide insertion point controller since it triggers a show of it
11213            mSuggestionsPopupWindow.hide();
11214        }
11215        hideInsertionPointCursorController();
11216        stopSelectionActionMode();
11217    }
11218
11219    /**
11220     * Get the character offset closest to the specified absolute position. A typical use case is to
11221     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11222     *
11223     * @param x The horizontal absolute position of a point on screen
11224     * @param y The vertical absolute position of a point on screen
11225     * @return the character offset for the character whose position is closest to the specified
11226     *  position. Returns -1 if there is no layout.
11227     */
11228    public int getOffsetForPosition(float x, float y) {
11229        if (getLayout() == null) return -1;
11230        final int line = getLineAtCoordinate(y);
11231        final int offset = getOffsetAtCoordinate(line, x);
11232        return offset;
11233    }
11234
11235    private float convertToLocalHorizontalCoordinate(float x) {
11236        x -= getTotalPaddingLeft();
11237        // Clamp the position to inside of the view.
11238        x = Math.max(0.0f, x);
11239        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11240        x += getScrollX();
11241        return x;
11242    }
11243
11244    private int getLineAtCoordinate(float y) {
11245        y -= getTotalPaddingTop();
11246        // Clamp the position to inside of the view.
11247        y = Math.max(0.0f, y);
11248        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11249        y += getScrollY();
11250        return getLayout().getLineForVertical((int) y);
11251    }
11252
11253    private int getOffsetAtCoordinate(int line, float x) {
11254        x = convertToLocalHorizontalCoordinate(x);
11255        return getLayout().getOffsetForHorizontal(line, x);
11256    }
11257
11258    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11259     * in the view. Returns false when the position is in the empty space of left/right of text.
11260     */
11261    private boolean isPositionOnText(float x, float y) {
11262        if (getLayout() == null) return false;
11263
11264        final int line = getLineAtCoordinate(y);
11265        x = convertToLocalHorizontalCoordinate(x);
11266
11267        if (x < getLayout().getLineLeft(line)) return false;
11268        if (x > getLayout().getLineRight(line)) return false;
11269        return true;
11270    }
11271
11272    @Override
11273    public boolean onDragEvent(DragEvent event) {
11274        switch (event.getAction()) {
11275            case DragEvent.ACTION_DRAG_STARTED:
11276                return hasInsertionController();
11277
11278            case DragEvent.ACTION_DRAG_ENTERED:
11279                TextView.this.requestFocus();
11280                return true;
11281
11282            case DragEvent.ACTION_DRAG_LOCATION:
11283                final int offset = getOffsetForPosition(event.getX(), event.getY());
11284                Selection.setSelection((Spannable)mText, offset);
11285                return true;
11286
11287            case DragEvent.ACTION_DROP:
11288                onDrop(event);
11289                return true;
11290
11291            case DragEvent.ACTION_DRAG_ENDED:
11292            case DragEvent.ACTION_DRAG_EXITED:
11293            default:
11294                return true;
11295        }
11296    }
11297
11298    private void onDrop(DragEvent event) {
11299        StringBuilder content = new StringBuilder("");
11300        ClipData clipData = event.getClipData();
11301        final int itemCount = clipData.getItemCount();
11302        for (int i=0; i < itemCount; i++) {
11303            Item item = clipData.getItemAt(i);
11304            content.append(item.coerceToText(TextView.this.mContext));
11305        }
11306
11307        final int offset = getOffsetForPosition(event.getX(), event.getY());
11308
11309        Object localState = event.getLocalState();
11310        DragLocalState dragLocalState = null;
11311        if (localState instanceof DragLocalState) {
11312            dragLocalState = (DragLocalState) localState;
11313        }
11314        boolean dragDropIntoItself = dragLocalState != null &&
11315                dragLocalState.sourceTextView == this;
11316
11317        if (dragDropIntoItself) {
11318            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11319                // A drop inside the original selection discards the drop.
11320                return;
11321            }
11322        }
11323
11324        final int originalLength = mText.length();
11325        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11326        int min = extractRangeStartFromLong(minMax);
11327        int max = extractRangeEndFromLong(minMax);
11328
11329        Selection.setSelection((Spannable) mText, max);
11330        replaceText_internal(min, max, content);
11331
11332        if (dragDropIntoItself) {
11333            int dragSourceStart = dragLocalState.start;
11334            int dragSourceEnd = dragLocalState.end;
11335            if (max <= dragSourceStart) {
11336                // Inserting text before selection has shifted positions
11337                final int shift = mText.length() - originalLength;
11338                dragSourceStart += shift;
11339                dragSourceEnd += shift;
11340            }
11341
11342            // Delete original selection
11343            deleteText_internal(dragSourceStart, dragSourceEnd);
11344
11345            // Make sure we do not leave two adjacent spaces.
11346            if ((dragSourceStart == 0 ||
11347                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11348                    (dragSourceStart == mText.length() ||
11349                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11350                final int pos = dragSourceStart == mText.length() ?
11351                        dragSourceStart - 1 : dragSourceStart;
11352                deleteText_internal(pos, pos + 1);
11353            }
11354        }
11355    }
11356
11357    /**
11358     * @return True if this view supports insertion handles.
11359     */
11360    boolean hasInsertionController() {
11361        return mInsertionControllerEnabled;
11362    }
11363
11364    /**
11365     * @return True if this view supports selection handles.
11366     */
11367    boolean hasSelectionController() {
11368        return mSelectionControllerEnabled;
11369    }
11370
11371    InsertionPointCursorController getInsertionController() {
11372        if (!mInsertionControllerEnabled) {
11373            return null;
11374        }
11375
11376        if (mInsertionPointCursorController == null) {
11377            mInsertionPointCursorController = new InsertionPointCursorController();
11378
11379            final ViewTreeObserver observer = getViewTreeObserver();
11380            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11381        }
11382
11383        return mInsertionPointCursorController;
11384    }
11385
11386    SelectionModifierCursorController getSelectionController() {
11387        if (!mSelectionControllerEnabled) {
11388            return null;
11389        }
11390
11391        if (mSelectionModifierCursorController == null) {
11392            mSelectionModifierCursorController = new SelectionModifierCursorController();
11393
11394            final ViewTreeObserver observer = getViewTreeObserver();
11395            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11396        }
11397
11398        return mSelectionModifierCursorController;
11399    }
11400
11401    boolean isInBatchEditMode() {
11402        final InputMethodState ims = mInputMethodState;
11403        if (ims != null) {
11404            return ims.mBatchEditNesting > 0;
11405        }
11406        return mInBatchEditControllers;
11407    }
11408
11409    @Override
11410    public void onResolveTextDirection() {
11411        if (hasPasswordTransformationMethod()) {
11412            mTextDir = TextDirectionHeuristics.LOCALE;
11413            return;
11414        }
11415
11416        // Always need to resolve layout direction first
11417        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11418
11419        // Now, we can select the heuristic
11420        int textDir = getResolvedTextDirection();
11421        switch (textDir) {
11422            default:
11423            case TEXT_DIRECTION_FIRST_STRONG:
11424                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11425                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11426                break;
11427            case TEXT_DIRECTION_ANY_RTL:
11428                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11429                break;
11430            case TEXT_DIRECTION_LTR:
11431                mTextDir = TextDirectionHeuristics.LTR;
11432                break;
11433            case TEXT_DIRECTION_RTL:
11434                mTextDir = TextDirectionHeuristics.RTL;
11435                break;
11436            case TEXT_DIRECTION_LOCALE:
11437                mTextDir = TextDirectionHeuristics.LOCALE;
11438                break;
11439        }
11440    }
11441
11442    /**
11443     * Subclasses will need to override this method to implement their own way of resolving
11444     * drawables depending on the layout direction.
11445     *
11446     * A call to the super method will be required from the subclasses implementation.
11447     */
11448    protected void resolveDrawables() {
11449        // No need to resolve twice
11450        if (mResolvedDrawables) {
11451            return;
11452        }
11453        // No drawable to resolve
11454        if (mDrawables == null) {
11455            return;
11456        }
11457        // No relative drawable to resolve
11458        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11459            mResolvedDrawables = true;
11460            return;
11461        }
11462
11463        Drawables dr = mDrawables;
11464        switch(getResolvedLayoutDirection()) {
11465            case LAYOUT_DIRECTION_RTL:
11466                if (dr.mDrawableStart != null) {
11467                    dr.mDrawableRight = dr.mDrawableStart;
11468
11469                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11470                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11471                }
11472                if (dr.mDrawableEnd != null) {
11473                    dr.mDrawableLeft = dr.mDrawableEnd;
11474
11475                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11476                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11477                }
11478                break;
11479
11480            case LAYOUT_DIRECTION_LTR:
11481            default:
11482                if (dr.mDrawableStart != null) {
11483                    dr.mDrawableLeft = dr.mDrawableStart;
11484
11485                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11486                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11487                }
11488                if (dr.mDrawableEnd != null) {
11489                    dr.mDrawableRight = dr.mDrawableEnd;
11490
11491                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11492                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11493                }
11494                break;
11495        }
11496        mResolvedDrawables = true;
11497    }
11498
11499    protected void resetResolvedDrawables() {
11500        mResolvedDrawables = false;
11501    }
11502
11503    /**
11504     * @hide
11505     */
11506    protected void viewClicked(InputMethodManager imm) {
11507        if (imm != null) {
11508            imm.viewClicked(this);
11509        }
11510    }
11511
11512    /**
11513     * Deletes the range of text [start, end[.
11514     * @hide
11515     */
11516    protected void deleteText_internal(int start, int end) {
11517        ((Editable) mText).delete(start, end);
11518    }
11519
11520    /**
11521     * Replaces the range of text [start, end[ by replacement text
11522     * @hide
11523     */
11524    protected void replaceText_internal(int start, int end, CharSequence text) {
11525        ((Editable) mText).replace(start, end, text);
11526    }
11527
11528    /**
11529     * Sets a span on the specified range of text
11530     * @hide
11531     */
11532    protected void setSpan_internal(Object span, int start, int end, int flags) {
11533        ((Editable) mText).setSpan(span, start, end, flags);
11534    }
11535
11536    /**
11537     * Moves the cursor to the specified offset position in text
11538     * @hide
11539     */
11540    protected void setCursorPosition_internal(int start, int end) {
11541        Selection.setSelection(((Editable) mText), start, end);
11542    }
11543
11544    @ViewDebug.ExportedProperty(category = "text")
11545    private CharSequence            mText;
11546    private CharSequence            mTransformed;
11547    private BufferType              mBufferType = BufferType.NORMAL;
11548
11549    private int                     mInputType = EditorInfo.TYPE_NULL;
11550    private CharSequence            mHint;
11551    private Layout                  mHintLayout;
11552
11553    private KeyListener             mInput;
11554
11555    private MovementMethod          mMovement;
11556    private TransformationMethod    mTransformation;
11557    private boolean                 mAllowTransformationLengthChange;
11558    private ChangeWatcher           mChangeWatcher;
11559
11560    private ArrayList<TextWatcher>  mListeners = null;
11561
11562    // display attributes
11563    private final TextPaint         mTextPaint;
11564    private boolean                 mUserSetTextScaleX;
11565    private final Paint             mHighlightPaint;
11566    private int                     mHighlightColor = 0x6633B5E5;
11567    private Layout                  mLayout;
11568
11569    private long                    mShowCursor;
11570    private Blink                   mBlink;
11571    private boolean                 mCursorVisible = true;
11572
11573    // Cursor Controllers.
11574    private InsertionPointCursorController mInsertionPointCursorController;
11575    private SelectionModifierCursorController mSelectionModifierCursorController;
11576    private ActionMode              mSelectionActionMode;
11577    private boolean                 mInsertionControllerEnabled;
11578    private boolean                 mSelectionControllerEnabled;
11579    private boolean                 mInBatchEditControllers;
11580
11581    private boolean                 mSelectAllOnFocus = false;
11582
11583    private int                     mGravity = Gravity.TOP | Gravity.START;
11584    private boolean                 mHorizontallyScrolling;
11585
11586    private int                     mAutoLinkMask;
11587    private boolean                 mLinksClickable = true;
11588
11589    private float                   mSpacingMult = 1.0f;
11590    private float                   mSpacingAdd = 0.0f;
11591    private boolean                 mTextIsSelectable = false;
11592
11593    private static final int        LINES = 1;
11594    private static final int        EMS = LINES;
11595    private static final int        PIXELS = 2;
11596
11597    private int                     mMaximum = Integer.MAX_VALUE;
11598    private int                     mMaxMode = LINES;
11599    private int                     mMinimum = 0;
11600    private int                     mMinMode = LINES;
11601
11602    private int                     mOldMaximum = mMaximum;
11603    private int                     mOldMaxMode = mMaxMode;
11604
11605    private int                     mMaxWidth = Integer.MAX_VALUE;
11606    private int                     mMaxWidthMode = PIXELS;
11607    private int                     mMinWidth = 0;
11608    private int                     mMinWidthMode = PIXELS;
11609
11610    private boolean                 mSingleLine;
11611    private int                     mDesiredHeightAtMeasure = -1;
11612    private boolean                 mIncludePad = true;
11613
11614    // tmp primitives, so we don't alloc them on each draw
11615    private Path                    mHighlightPath;
11616    private boolean                 mHighlightPathBogus = true;
11617    private static final RectF      sTempRect = new RectF();
11618    private static final float[]    sTmpPosition = new float[2];
11619
11620    // XXX should be much larger
11621    private static final int        VERY_WIDE = 1024*1024;
11622
11623    private static final int        BLINK = 500;
11624
11625    private static final int ANIMATED_SCROLL_GAP = 250;
11626    private long mLastScroll;
11627    private Scroller mScroller = null;
11628
11629    private BoringLayout.Metrics mBoring;
11630    private BoringLayout.Metrics mHintBoring;
11631
11632    private BoringLayout mSavedLayout, mSavedHintLayout;
11633
11634    private TextDirectionHeuristic mTextDir = null;
11635
11636    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11637    private InputFilter[] mFilters = NO_FILTERS;
11638    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11639    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11640    // System wide time for last cut or copy action.
11641    private static long sLastCutOrCopyTime;
11642    // Used to highlight a word when it is corrected by the IME
11643    private CorrectionHighlighter mCorrectionHighlighter;
11644    // New state used to change background based on whether this TextView is multiline.
11645    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11646}
11647