TextView.java revision 566e8baf43a08b1000b8c4c24fb14fe94e46394d 
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 static final int PREDRAW_NOT_REGISTERED = 0;
260    private static final int PREDRAW_PENDING = 1;
261    private static final int PREDRAW_DONE = 2;
262    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
263
264    private TextUtils.TruncateAt mEllipsize = null;
265
266    // Enum for the "typeface" XML parameter.
267    // TODO: How can we get this from the XML instead of hardcoding it here?
268    private static final int SANS = 1;
269    private static final int SERIF = 2;
270    private static final int MONOSPACE = 3;
271
272    // Bitfield for the "numeric" XML parameter.
273    // TODO: How can we get this from the XML instead of hardcoding it here?
274    private static final int SIGNED = 2;
275    private static final int DECIMAL = 4;
276
277    static class Drawables {
278        final Rect mCompoundRect = new Rect();
279        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
280                mDrawableStart, mDrawableEnd;
281        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
282                mDrawableSizeStart, mDrawableSizeEnd;
283        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
284                mDrawableHeightStart, mDrawableHeightEnd;
285        int mDrawablePadding;
286    }
287    private Drawables mDrawables;
288
289    private DisplayList mTextDisplayList;
290    private boolean mTextDisplayListIsValid;
291
292    private CharSequence mError;
293    private boolean mErrorWasChanged;
294    private ErrorPopup mPopup;
295    /**
296     * This flag is set if the TextView tries to display an error before it
297     * is attached to the window (so its position is still unknown).
298     * It causes the error to be shown later, when onAttachedToWindow()
299     * is called.
300     */
301    private boolean mShowErrorAfterAttach;
302
303    private CharWrapper mCharWrapper = null;
304
305    private boolean mSelectionMoved = false;
306    private boolean mTouchFocusSelected = false;
307
308    private Marquee mMarquee;
309    private boolean mRestartMarquee;
310
311    private int mMarqueeRepeatLimit = 3;
312
313    static class InputContentType {
314        int imeOptions = EditorInfo.IME_NULL;
315        String privateImeOptions;
316        CharSequence imeActionLabel;
317        int imeActionId;
318        Bundle extras;
319        OnEditorActionListener onEditorActionListener;
320        boolean enterDown;
321    }
322    InputContentType mInputContentType;
323
324    static class InputMethodState {
325        Rect mCursorRectInWindow = new Rect();
326        RectF mTmpRectF = new RectF();
327        float[] mTmpOffset = new float[2];
328        ExtractedTextRequest mExtracting;
329        final ExtractedText mTmpExtracted = new ExtractedText();
330        int mBatchEditNesting;
331        boolean mCursorChanged;
332        boolean mSelectionModeChanged;
333        boolean mContentChanged;
334        int mChangedStart, mChangedEnd, mChangedDelta;
335    }
336    InputMethodState mInputMethodState;
337
338    private int mTextSelectHandleLeftRes;
339    private int mTextSelectHandleRightRes;
340    private int mTextSelectHandleRes;
341
342    private int mTextEditSuggestionItemLayout;
343    private SuggestionsPopupWindow mSuggestionsPopupWindow;
344    private SuggestionRangeSpan mSuggestionRangeSpan;
345    private Runnable mShowSuggestionRunnable;
346
347    private int mCursorDrawableRes;
348    private final Drawable[] mCursorDrawable = new Drawable[2];
349    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2 (split)
350
351    private Drawable mSelectHandleLeft;
352    private Drawable mSelectHandleRight;
353    private Drawable mSelectHandleCenter;
354
355    // Global listener that detects changes in the global position of the TextView
356    private PositionListener mPositionListener;
357
358    private float mLastDownPositionX, mLastDownPositionY;
359    private Callback mCustomSelectionActionModeCallback;
360
361    // Set when this TextView gained focus with some text selected. Will start selection mode.
362    private boolean mCreatedWithASelection = false;
363
364    private WordIterator mWordIterator;
365
366    private SpellChecker mSpellChecker;
367
368    private boolean mSoftInputShownOnFocus = true;
369
370    // The alignment to pass to Layout, or null if not resolved.
371    private Layout.Alignment mLayoutAlignment;
372
373    // The default value for mTextAlign.
374    private TextAlign mTextAlign = TextAlign.INHERIT;
375
376    private static enum TextAlign {
377        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
378    }
379
380    private boolean mResolvedDrawables = false;
381
382    /**
383     * On some devices the fading edges add a performance penalty if used
384     * extensively in the same layout. This mode indicates how the marquee
385     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
386     */
387    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
388
389    /**
390     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
391     * the layout that should be used when the mode switches.
392     */
393    private Layout mSavedMarqueeModeLayout;
394
395    /**
396     * Draw marquee text with fading edges as usual
397     */
398    private static final int MARQUEE_FADE_NORMAL = 0;
399
400    /**
401     * Draw marquee text as ellipsize end while inactive instead of with the fade.
402     * (Useful for devices where the fade can be expensive if overdone)
403     */
404    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
405
406    /**
407     * Draw marquee text with fading edges because it is currently active/animating.
408     */
409    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
410
411    /*
412     * Kick-start the font cache for the zygote process (to pay the cost of
413     * initializing freetype for our default font only once).
414     */
415    static {
416        Paint p = new Paint();
417        p.setAntiAlias(true);
418        // We don't care about the result, just the side-effect of measuring.
419        p.measureText("H");
420    }
421
422    /**
423     * Interface definition for a callback to be invoked when an action is
424     * performed on the editor.
425     */
426    public interface OnEditorActionListener {
427        /**
428         * Called when an action is being performed.
429         *
430         * @param v The view that was clicked.
431         * @param actionId Identifier of the action.  This will be either the
432         * identifier you supplied, or {@link EditorInfo#IME_NULL
433         * EditorInfo.IME_NULL} if being called due to the enter key
434         * being pressed.
435         * @param event If triggered by an enter key, this is the event;
436         * otherwise, this is null.
437         * @return Return true if you have consumed the action, else false.
438         */
439        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
440    }
441
442    public TextView(Context context) {
443        this(context, null);
444    }
445
446    public TextView(Context context, AttributeSet attrs) {
447        this(context, attrs, com.android.internal.R.attr.textViewStyle);
448    }
449
450    @SuppressWarnings("deprecation")
451    public TextView(Context context, AttributeSet attrs, int defStyle) {
452        super(context, attrs, defStyle);
453        mText = "";
454
455        final Resources res = getResources();
456        final CompatibilityInfo compat = res.getCompatibilityInfo();
457
458        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
459        mTextPaint.density = res.getDisplayMetrics().density;
460        mTextPaint.setCompatibilityScaling(compat.applicationScale);
461
462        // If we get the paint from the skin, we should set it to left, since
463        // the layout always wants it to be left.
464        // mTextPaint.setTextAlign(Paint.Align.LEFT);
465
466        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
467        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
468
469        mMovement = getDefaultMovementMethod();
470        mTransformation = null;
471
472        int textColorHighlight = 0;
473        ColorStateList textColor = null;
474        ColorStateList textColorHint = null;
475        ColorStateList textColorLink = null;
476        int textSize = 15;
477        int typefaceIndex = -1;
478        int styleIndex = -1;
479        boolean allCaps = false;
480
481        final Resources.Theme theme = context.getTheme();
482
483        /*
484         * Look the appearance up without checking first if it exists because
485         * almost every TextView has one and it greatly simplifies the logic
486         * to be able to parse the appearance first and then let specific tags
487         * for this View override it.
488         */
489        TypedArray a = theme.obtainStyledAttributes(
490                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
491        TypedArray appearance = null;
492        int ap = a.getResourceId(
493                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
494        a.recycle();
495        if (ap != -1) {
496            appearance = theme.obtainStyledAttributes(
497                    ap, com.android.internal.R.styleable.TextAppearance);
498        }
499        if (appearance != null) {
500            int n = appearance.getIndexCount();
501            for (int i = 0; i < n; i++) {
502                int attr = appearance.getIndex(i);
503
504                switch (attr) {
505                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
506                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
507                    break;
508
509                case com.android.internal.R.styleable.TextAppearance_textColor:
510                    textColor = appearance.getColorStateList(attr);
511                    break;
512
513                case com.android.internal.R.styleable.TextAppearance_textColorHint:
514                    textColorHint = appearance.getColorStateList(attr);
515                    break;
516
517                case com.android.internal.R.styleable.TextAppearance_textColorLink:
518                    textColorLink = appearance.getColorStateList(attr);
519                    break;
520
521                case com.android.internal.R.styleable.TextAppearance_textSize:
522                    textSize = appearance.getDimensionPixelSize(attr, textSize);
523                    break;
524
525                case com.android.internal.R.styleable.TextAppearance_typeface:
526                    typefaceIndex = appearance.getInt(attr, -1);
527                    break;
528
529                case com.android.internal.R.styleable.TextAppearance_textStyle:
530                    styleIndex = appearance.getInt(attr, -1);
531                    break;
532
533                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
534                    allCaps = appearance.getBoolean(attr, false);
535                    break;
536                }
537            }
538
539            appearance.recycle();
540        }
541
542        boolean editable = getDefaultEditable();
543        CharSequence inputMethod = null;
544        int numeric = 0;
545        CharSequence digits = null;
546        boolean phone = false;
547        boolean autotext = false;
548        int autocap = -1;
549        int buffertype = 0;
550        boolean selectallonfocus = false;
551        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
552            drawableBottom = null, drawableStart = null, drawableEnd = null;
553        int drawablePadding = 0;
554        int ellipsize = -1;
555        boolean singleLine = false;
556        int maxlength = -1;
557        CharSequence text = "";
558        CharSequence hint = null;
559        int shadowcolor = 0;
560        float dx = 0, dy = 0, r = 0;
561        boolean password = false;
562        int inputType = EditorInfo.TYPE_NULL;
563
564        a = theme.obtainStyledAttributes(
565                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
566
567        int n = a.getIndexCount();
568        for (int i = 0; i < n; i++) {
569            int attr = a.getIndex(i);
570
571            switch (attr) {
572            case com.android.internal.R.styleable.TextView_editable:
573                editable = a.getBoolean(attr, editable);
574                break;
575
576            case com.android.internal.R.styleable.TextView_inputMethod:
577                inputMethod = a.getText(attr);
578                break;
579
580            case com.android.internal.R.styleable.TextView_numeric:
581                numeric = a.getInt(attr, numeric);
582                break;
583
584            case com.android.internal.R.styleable.TextView_digits:
585                digits = a.getText(attr);
586                break;
587
588            case com.android.internal.R.styleable.TextView_phoneNumber:
589                phone = a.getBoolean(attr, phone);
590                break;
591
592            case com.android.internal.R.styleable.TextView_autoText:
593                autotext = a.getBoolean(attr, autotext);
594                break;
595
596            case com.android.internal.R.styleable.TextView_capitalize:
597                autocap = a.getInt(attr, autocap);
598                break;
599
600            case com.android.internal.R.styleable.TextView_bufferType:
601                buffertype = a.getInt(attr, buffertype);
602                break;
603
604            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
605                selectallonfocus = a.getBoolean(attr, selectallonfocus);
606                break;
607
608            case com.android.internal.R.styleable.TextView_autoLink:
609                mAutoLinkMask = a.getInt(attr, 0);
610                break;
611
612            case com.android.internal.R.styleable.TextView_linksClickable:
613                mLinksClickable = a.getBoolean(attr, true);
614                break;
615
616//            TODO uncomment when this attribute is made public in the next release
617//                 also add TextView_showSoftInputOnFocus to the list of attributes above
618//            case com.android.internal.R.styleable.TextView_showSoftInputOnFocus:
619//                setShowSoftInputOnFocus(a.getBoolean(attr, true));
620//                break;
621
622            case com.android.internal.R.styleable.TextView_drawableLeft:
623                drawableLeft = a.getDrawable(attr);
624                break;
625
626            case com.android.internal.R.styleable.TextView_drawableTop:
627                drawableTop = a.getDrawable(attr);
628                break;
629
630            case com.android.internal.R.styleable.TextView_drawableRight:
631                drawableRight = a.getDrawable(attr);
632                break;
633
634            case com.android.internal.R.styleable.TextView_drawableBottom:
635                drawableBottom = a.getDrawable(attr);
636                break;
637
638            case com.android.internal.R.styleable.TextView_drawableStart:
639                drawableStart = a.getDrawable(attr);
640                break;
641
642            case com.android.internal.R.styleable.TextView_drawableEnd:
643                drawableEnd = a.getDrawable(attr);
644                break;
645
646            case com.android.internal.R.styleable.TextView_drawablePadding:
647                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
648                break;
649
650            case com.android.internal.R.styleable.TextView_maxLines:
651                setMaxLines(a.getInt(attr, -1));
652                break;
653
654            case com.android.internal.R.styleable.TextView_maxHeight:
655                setMaxHeight(a.getDimensionPixelSize(attr, -1));
656                break;
657
658            case com.android.internal.R.styleable.TextView_lines:
659                setLines(a.getInt(attr, -1));
660                break;
661
662            case com.android.internal.R.styleable.TextView_height:
663                setHeight(a.getDimensionPixelSize(attr, -1));
664                break;
665
666            case com.android.internal.R.styleable.TextView_minLines:
667                setMinLines(a.getInt(attr, -1));
668                break;
669
670            case com.android.internal.R.styleable.TextView_minHeight:
671                setMinHeight(a.getDimensionPixelSize(attr, -1));
672                break;
673
674            case com.android.internal.R.styleable.TextView_maxEms:
675                setMaxEms(a.getInt(attr, -1));
676                break;
677
678            case com.android.internal.R.styleable.TextView_maxWidth:
679                setMaxWidth(a.getDimensionPixelSize(attr, -1));
680                break;
681
682            case com.android.internal.R.styleable.TextView_ems:
683                setEms(a.getInt(attr, -1));
684                break;
685
686            case com.android.internal.R.styleable.TextView_width:
687                setWidth(a.getDimensionPixelSize(attr, -1));
688                break;
689
690            case com.android.internal.R.styleable.TextView_minEms:
691                setMinEms(a.getInt(attr, -1));
692                break;
693
694            case com.android.internal.R.styleable.TextView_minWidth:
695                setMinWidth(a.getDimensionPixelSize(attr, -1));
696                break;
697
698            case com.android.internal.R.styleable.TextView_gravity:
699                setGravity(a.getInt(attr, -1));
700                break;
701
702            case com.android.internal.R.styleable.TextView_hint:
703                hint = a.getText(attr);
704                break;
705
706            case com.android.internal.R.styleable.TextView_text:
707                text = a.getText(attr);
708                break;
709
710            case com.android.internal.R.styleable.TextView_scrollHorizontally:
711                if (a.getBoolean(attr, false)) {
712                    setHorizontallyScrolling(true);
713                }
714                break;
715
716            case com.android.internal.R.styleable.TextView_singleLine:
717                singleLine = a.getBoolean(attr, singleLine);
718                break;
719
720            case com.android.internal.R.styleable.TextView_ellipsize:
721                ellipsize = a.getInt(attr, ellipsize);
722                break;
723
724            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
725                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
726                break;
727
728            case com.android.internal.R.styleable.TextView_includeFontPadding:
729                if (!a.getBoolean(attr, true)) {
730                    setIncludeFontPadding(false);
731                }
732                break;
733
734            case com.android.internal.R.styleable.TextView_cursorVisible:
735                if (!a.getBoolean(attr, true)) {
736                    setCursorVisible(false);
737                }
738                break;
739
740            case com.android.internal.R.styleable.TextView_maxLength:
741                maxlength = a.getInt(attr, -1);
742                break;
743
744            case com.android.internal.R.styleable.TextView_textScaleX:
745                setTextScaleX(a.getFloat(attr, 1.0f));
746                break;
747
748            case com.android.internal.R.styleable.TextView_freezesText:
749                mFreezesText = a.getBoolean(attr, false);
750                break;
751
752            case com.android.internal.R.styleable.TextView_shadowColor:
753                shadowcolor = a.getInt(attr, 0);
754                break;
755
756            case com.android.internal.R.styleable.TextView_shadowDx:
757                dx = a.getFloat(attr, 0);
758                break;
759
760            case com.android.internal.R.styleable.TextView_shadowDy:
761                dy = a.getFloat(attr, 0);
762                break;
763
764            case com.android.internal.R.styleable.TextView_shadowRadius:
765                r = a.getFloat(attr, 0);
766                break;
767
768            case com.android.internal.R.styleable.TextView_enabled:
769                setEnabled(a.getBoolean(attr, isEnabled()));
770                break;
771
772            case com.android.internal.R.styleable.TextView_textColorHighlight:
773                textColorHighlight = a.getColor(attr, textColorHighlight);
774                break;
775
776            case com.android.internal.R.styleable.TextView_textColor:
777                textColor = a.getColorStateList(attr);
778                break;
779
780            case com.android.internal.R.styleable.TextView_textColorHint:
781                textColorHint = a.getColorStateList(attr);
782                break;
783
784            case com.android.internal.R.styleable.TextView_textColorLink:
785                textColorLink = a.getColorStateList(attr);
786                break;
787
788            case com.android.internal.R.styleable.TextView_textSize:
789                textSize = a.getDimensionPixelSize(attr, textSize);
790                break;
791
792            case com.android.internal.R.styleable.TextView_typeface:
793                typefaceIndex = a.getInt(attr, typefaceIndex);
794                break;
795
796            case com.android.internal.R.styleable.TextView_textStyle:
797                styleIndex = a.getInt(attr, styleIndex);
798                break;
799
800            case com.android.internal.R.styleable.TextView_password:
801                password = a.getBoolean(attr, password);
802                break;
803
804            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
805                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
806                break;
807
808            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
809                mSpacingMult = a.getFloat(attr, mSpacingMult);
810                break;
811
812            case com.android.internal.R.styleable.TextView_inputType:
813                inputType = a.getInt(attr, mInputType);
814                break;
815
816            case com.android.internal.R.styleable.TextView_imeOptions:
817                if (mInputContentType == null) {
818                    mInputContentType = new InputContentType();
819                }
820                mInputContentType.imeOptions = a.getInt(attr,
821                        mInputContentType.imeOptions);
822                break;
823
824            case com.android.internal.R.styleable.TextView_imeActionLabel:
825                if (mInputContentType == null) {
826                    mInputContentType = new InputContentType();
827                }
828                mInputContentType.imeActionLabel = a.getText(attr);
829                break;
830
831            case com.android.internal.R.styleable.TextView_imeActionId:
832                if (mInputContentType == null) {
833                    mInputContentType = new InputContentType();
834                }
835                mInputContentType.imeActionId = a.getInt(attr,
836                        mInputContentType.imeActionId);
837                break;
838
839            case com.android.internal.R.styleable.TextView_privateImeOptions:
840                setPrivateImeOptions(a.getString(attr));
841                break;
842
843            case com.android.internal.R.styleable.TextView_editorExtras:
844                try {
845                    setInputExtras(a.getResourceId(attr, 0));
846                } catch (XmlPullParserException e) {
847                    Log.w(LOG_TAG, "Failure reading input extras", e);
848                } catch (IOException e) {
849                    Log.w(LOG_TAG, "Failure reading input extras", e);
850                }
851                break;
852
853            case com.android.internal.R.styleable.TextView_textCursorDrawable:
854                mCursorDrawableRes = a.getResourceId(attr, 0);
855                break;
856
857            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
858                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
859                break;
860
861            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
862                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
863                break;
864
865            case com.android.internal.R.styleable.TextView_textSelectHandle:
866                mTextSelectHandleRes = a.getResourceId(attr, 0);
867                break;
868
869            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
870                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
871                break;
872
873            case com.android.internal.R.styleable.TextView_textIsSelectable:
874                mTextIsSelectable = a.getBoolean(attr, false);
875                break;
876
877            case com.android.internal.R.styleable.TextView_textAllCaps:
878                allCaps = a.getBoolean(attr, false);
879                break;
880            }
881        }
882        a.recycle();
883
884        BufferType bufferType = BufferType.EDITABLE;
885
886        final int variation =
887                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
888        final boolean passwordInputType = variation
889                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
890        final boolean webPasswordInputType = variation
891                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
892        final boolean numberPasswordInputType = variation
893                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
894
895        if (inputMethod != null) {
896            Class<?> c;
897
898            try {
899                c = Class.forName(inputMethod.toString());
900            } catch (ClassNotFoundException ex) {
901                throw new RuntimeException(ex);
902            }
903
904            try {
905                mInput = (KeyListener) c.newInstance();
906            } catch (InstantiationException ex) {
907                throw new RuntimeException(ex);
908            } catch (IllegalAccessException ex) {
909                throw new RuntimeException(ex);
910            }
911            try {
912                mInputType = inputType != EditorInfo.TYPE_NULL
913                        ? inputType
914                        : mInput.getInputType();
915            } catch (IncompatibleClassChangeError e) {
916                mInputType = EditorInfo.TYPE_CLASS_TEXT;
917            }
918        } else if (digits != null) {
919            mInput = DigitsKeyListener.getInstance(digits.toString());
920            // If no input type was specified, we will default to generic
921            // text, since we can't tell the IME about the set of digits
922            // that was selected.
923            mInputType = inputType != EditorInfo.TYPE_NULL
924                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
925        } else if (inputType != EditorInfo.TYPE_NULL) {
926            setInputType(inputType, true);
927            // If set, the input type overrides what was set using the deprecated singleLine flag.
928            singleLine = !isMultilineInputType(inputType);
929        } else if (phone) {
930            mInput = DialerKeyListener.getInstance();
931            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
932        } else if (numeric != 0) {
933            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
934                                                   (numeric & DECIMAL) != 0);
935            inputType = EditorInfo.TYPE_CLASS_NUMBER;
936            if ((numeric & SIGNED) != 0) {
937                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
938            }
939            if ((numeric & DECIMAL) != 0) {
940                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
941            }
942            mInputType = inputType;
943        } else if (autotext || autocap != -1) {
944            TextKeyListener.Capitalize cap;
945
946            inputType = EditorInfo.TYPE_CLASS_TEXT;
947
948            switch (autocap) {
949            case 1:
950                cap = TextKeyListener.Capitalize.SENTENCES;
951                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
952                break;
953
954            case 2:
955                cap = TextKeyListener.Capitalize.WORDS;
956                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
957                break;
958
959            case 3:
960                cap = TextKeyListener.Capitalize.CHARACTERS;
961                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
962                break;
963
964            default:
965                cap = TextKeyListener.Capitalize.NONE;
966                break;
967            }
968
969            mInput = TextKeyListener.getInstance(autotext, cap);
970            mInputType = inputType;
971        } else if (mTextIsSelectable) {
972            // Prevent text changes from keyboard.
973            mInputType = EditorInfo.TYPE_NULL;
974            mInput = null;
975            bufferType = BufferType.SPANNABLE;
976            // Required to request focus while in touch mode.
977            setFocusableInTouchMode(true);
978            // So that selection can be changed using arrow keys and touch is handled.
979            setMovementMethod(ArrowKeyMovementMethod.getInstance());
980        } else if (editable) {
981            mInput = TextKeyListener.getInstance();
982            mInputType = EditorInfo.TYPE_CLASS_TEXT;
983        } else {
984            mInput = null;
985
986            switch (buffertype) {
987                case 0:
988                    bufferType = BufferType.NORMAL;
989                    break;
990                case 1:
991                    bufferType = BufferType.SPANNABLE;
992                    break;
993                case 2:
994                    bufferType = BufferType.EDITABLE;
995                    break;
996            }
997        }
998
999        // mInputType has been set from inputType, possibly modified by mInputMethod.
1000        // Specialize mInputType to [web]password if we have a text class and the original input
1001        // type was a password.
1002        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
1003            if (password || passwordInputType) {
1004                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1005                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
1006            }
1007            if (webPasswordInputType) {
1008                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1009                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
1010            }
1011        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1012            if (numberPasswordInputType) {
1013                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1014                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1015            }
1016        }
1017
1018        if (selectallonfocus) {
1019            mSelectAllOnFocus = true;
1020
1021            if (bufferType == BufferType.NORMAL)
1022                bufferType = BufferType.SPANNABLE;
1023        }
1024
1025        setCompoundDrawablesWithIntrinsicBounds(
1026            drawableLeft, drawableTop, drawableRight, drawableBottom);
1027        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1028        setCompoundDrawablePadding(drawablePadding);
1029
1030        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1031        // of lines of height are unchanged for multi-line TextViews.
1032        setInputTypeSingleLine(singleLine);
1033        applySingleLine(singleLine, singleLine, singleLine);
1034
1035        if (singleLine && mInput == null && ellipsize < 0) {
1036                ellipsize = 3; // END
1037        }
1038
1039        switch (ellipsize) {
1040            case 1:
1041                setEllipsize(TextUtils.TruncateAt.START);
1042                break;
1043            case 2:
1044                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1045                break;
1046            case 3:
1047                setEllipsize(TextUtils.TruncateAt.END);
1048                break;
1049            case 4:
1050                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1051                    setHorizontalFadingEdgeEnabled(true);
1052                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1053                } else {
1054                    setHorizontalFadingEdgeEnabled(false);
1055                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1056                }
1057                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1058                break;
1059        }
1060
1061        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1062        setHintTextColor(textColorHint);
1063        setLinkTextColor(textColorLink);
1064        if (textColorHighlight != 0) {
1065            setHighlightColor(textColorHighlight);
1066        }
1067        setRawTextSize(textSize);
1068
1069        if (allCaps) {
1070            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1071        }
1072
1073        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1074            setTransformationMethod(PasswordTransformationMethod.getInstance());
1075            typefaceIndex = MONOSPACE;
1076        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1077                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1078            typefaceIndex = MONOSPACE;
1079        }
1080
1081        setTypefaceByIndex(typefaceIndex, styleIndex);
1082
1083        if (shadowcolor != 0) {
1084            setShadowLayer(r, dx, dy, shadowcolor);
1085        }
1086
1087        if (maxlength >= 0) {
1088            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1089        } else {
1090            setFilters(NO_FILTERS);
1091        }
1092
1093        setText(text, bufferType);
1094        if (hint != null) setHint(hint);
1095
1096        /*
1097         * Views are not normally focusable unless specified to be.
1098         * However, TextViews that have input or movement methods *are*
1099         * focusable by default.
1100         */
1101        a = context.obtainStyledAttributes(attrs,
1102                                           com.android.internal.R.styleable.View,
1103                                           defStyle, 0);
1104
1105        boolean focusable = mMovement != null || mInput != null;
1106        boolean clickable = focusable;
1107        boolean longClickable = focusable;
1108
1109        n = a.getIndexCount();
1110        for (int i = 0; i < n; i++) {
1111            int attr = a.getIndex(i);
1112
1113            switch (attr) {
1114            case com.android.internal.R.styleable.View_focusable:
1115                focusable = a.getBoolean(attr, focusable);
1116                break;
1117
1118            case com.android.internal.R.styleable.View_clickable:
1119                clickable = a.getBoolean(attr, clickable);
1120                break;
1121
1122            case com.android.internal.R.styleable.View_longClickable:
1123                longClickable = a.getBoolean(attr, longClickable);
1124                break;
1125            }
1126        }
1127        a.recycle();
1128
1129        setFocusable(focusable);
1130        setClickable(clickable);
1131        setLongClickable(longClickable);
1132
1133        prepareCursorControllers();
1134    }
1135
1136    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1137        Typeface tf = null;
1138        switch (typefaceIndex) {
1139            case SANS:
1140                tf = Typeface.SANS_SERIF;
1141                break;
1142
1143            case SERIF:
1144                tf = Typeface.SERIF;
1145                break;
1146
1147            case MONOSPACE:
1148                tf = Typeface.MONOSPACE;
1149                break;
1150        }
1151
1152        setTypeface(tf, styleIndex);
1153    }
1154
1155    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1156        boolean hasRelativeDrawables = (start != null) || (end != null);
1157        if (hasRelativeDrawables) {
1158            Drawables dr = mDrawables;
1159            if (dr == null) {
1160                mDrawables = dr = new Drawables();
1161            }
1162            final Rect compoundRect = dr.mCompoundRect;
1163            int[] state = getDrawableState();
1164            if (start != null) {
1165                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1166                start.setState(state);
1167                start.copyBounds(compoundRect);
1168                start.setCallback(this);
1169
1170                dr.mDrawableStart = start;
1171                dr.mDrawableSizeStart = compoundRect.width();
1172                dr.mDrawableHeightStart = compoundRect.height();
1173            } else {
1174                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1175            }
1176            if (end != null) {
1177                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1178                end.setState(state);
1179                end.copyBounds(compoundRect);
1180                end.setCallback(this);
1181
1182                dr.mDrawableEnd = end;
1183                dr.mDrawableSizeEnd = compoundRect.width();
1184                dr.mDrawableHeightEnd = compoundRect.height();
1185            } else {
1186                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1187            }
1188        }
1189    }
1190
1191    @Override
1192    public void setEnabled(boolean enabled) {
1193        if (enabled == isEnabled()) {
1194            return;
1195        }
1196
1197        if (!enabled) {
1198            // Hide the soft input if the currently active TextView is disabled
1199            InputMethodManager imm = InputMethodManager.peekInstance();
1200            if (imm != null && imm.isActive(this)) {
1201                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1202            }
1203        }
1204
1205        super.setEnabled(enabled);
1206
1207        if (enabled) {
1208            // Make sure IME is updated with current editor info.
1209            InputMethodManager imm = InputMethodManager.peekInstance();
1210            if (imm != null) imm.restartInput(this);
1211        }
1212
1213        prepareCursorControllers();
1214
1215        // start or stop the cursor blinking as appropriate
1216        makeBlink();
1217    }
1218
1219    /**
1220     * Sets the typeface and style in which the text should be displayed,
1221     * and turns on the fake bold and italic bits in the Paint if the
1222     * Typeface that you provided does not have all the bits in the
1223     * style that you specified.
1224     *
1225     * @attr ref android.R.styleable#TextView_typeface
1226     * @attr ref android.R.styleable#TextView_textStyle
1227     */
1228    public void setTypeface(Typeface tf, int style) {
1229        if (style > 0) {
1230            if (tf == null) {
1231                tf = Typeface.defaultFromStyle(style);
1232            } else {
1233                tf = Typeface.create(tf, style);
1234            }
1235
1236            setTypeface(tf);
1237            // now compute what (if any) algorithmic styling is needed
1238            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1239            int need = style & ~typefaceStyle;
1240            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1241            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1242        } else {
1243            mTextPaint.setFakeBoldText(false);
1244            mTextPaint.setTextSkewX(0);
1245            setTypeface(tf);
1246        }
1247    }
1248
1249    /**
1250     * Subclasses override this to specify that they have a KeyListener
1251     * by default even if not specifically called for in the XML options.
1252     */
1253    protected boolean getDefaultEditable() {
1254        return false;
1255    }
1256
1257    /**
1258     * Subclasses override this to specify a default movement method.
1259     */
1260    protected MovementMethod getDefaultMovementMethod() {
1261        return null;
1262    }
1263
1264    /**
1265     * Return the text the TextView is displaying. If setText() was called with
1266     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1267     * the return value from this method to Spannable or Editable, respectively.
1268     *
1269     * Note: The content of the return value should not be modified. If you want
1270     * a modifiable one, you should make your own copy first.
1271     */
1272    @ViewDebug.CapturedViewProperty
1273    public CharSequence getText() {
1274        return mText;
1275    }
1276
1277    /**
1278     * Returns the length, in characters, of the text managed by this TextView
1279     */
1280    public int length() {
1281        return mText.length();
1282    }
1283
1284    /**
1285     * Return the text the TextView is displaying as an Editable object.  If
1286     * the text is not editable, null is returned.
1287     *
1288     * @see #getText
1289     */
1290    public Editable getEditableText() {
1291        return (mText instanceof Editable) ? (Editable)mText : null;
1292    }
1293
1294    /**
1295     * @return the height of one standard line in pixels.  Note that markup
1296     * within the text can cause individual lines to be taller or shorter
1297     * than this height, and the layout may contain additional first-
1298     * or last-line padding.
1299     */
1300    public int getLineHeight() {
1301        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1302    }
1303
1304    /**
1305     * @return the Layout that is currently being used to display the text.
1306     * This can be null if the text or width has recently changes.
1307     */
1308    public final Layout getLayout() {
1309        return mLayout;
1310    }
1311
1312    /**
1313     * @return the current key listener for this TextView.
1314     * This will frequently be null for non-EditText TextViews.
1315     */
1316    public final KeyListener getKeyListener() {
1317        return mInput;
1318    }
1319
1320    /**
1321     * Sets the key listener to be used with this TextView.  This can be null
1322     * to disallow user input.  Note that this method has significant and
1323     * subtle interactions with soft keyboards and other input method:
1324     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1325     * for important details.  Calling this method will replace the current
1326     * content type of the text view with the content type returned by the
1327     * key listener.
1328     * <p>
1329     * Be warned that if you want a TextView with a key listener or movement
1330     * method not to be focusable, or if you want a TextView without a
1331     * key listener or movement method to be focusable, you must call
1332     * {@link #setFocusable} again after calling this to get the focusability
1333     * back the way you want it.
1334     *
1335     * @attr ref android.R.styleable#TextView_numeric
1336     * @attr ref android.R.styleable#TextView_digits
1337     * @attr ref android.R.styleable#TextView_phoneNumber
1338     * @attr ref android.R.styleable#TextView_inputMethod
1339     * @attr ref android.R.styleable#TextView_capitalize
1340     * @attr ref android.R.styleable#TextView_autoText
1341     */
1342    public void setKeyListener(KeyListener input) {
1343        setKeyListenerOnly(input);
1344        fixFocusableAndClickableSettings();
1345
1346        if (input != null) {
1347            try {
1348                mInputType = mInput.getInputType();
1349            } catch (IncompatibleClassChangeError e) {
1350                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1351            }
1352            // Change inputType, without affecting transformation.
1353            // No need to applySingleLine since mSingleLine is unchanged.
1354            setInputTypeSingleLine(mSingleLine);
1355        } else {
1356            mInputType = EditorInfo.TYPE_NULL;
1357        }
1358
1359        InputMethodManager imm = InputMethodManager.peekInstance();
1360        if (imm != null) imm.restartInput(this);
1361    }
1362
1363    private void setKeyListenerOnly(KeyListener input) {
1364        mInput = input;
1365        if (mInput != null && !(mText instanceof Editable))
1366            setText(mText);
1367
1368        setFilters((Editable) mText, mFilters);
1369    }
1370
1371    /**
1372     * @return the movement method being used for this TextView.
1373     * This will frequently be null for non-EditText TextViews.
1374     */
1375    public final MovementMethod getMovementMethod() {
1376        return mMovement;
1377    }
1378
1379    /**
1380     * Sets the movement method (arrow key handler) to be used for
1381     * this TextView.  This can be null to disallow using the arrow keys
1382     * to move the cursor or scroll the view.
1383     * <p>
1384     * Be warned that if you want a TextView with a key listener or movement
1385     * method not to be focusable, or if you want a TextView without a
1386     * key listener or movement method to be focusable, you must call
1387     * {@link #setFocusable} again after calling this to get the focusability
1388     * back the way you want it.
1389     */
1390    public final void setMovementMethod(MovementMethod movement) {
1391        mMovement = movement;
1392
1393        if (mMovement != null && !(mText instanceof Spannable))
1394            setText(mText);
1395
1396        fixFocusableAndClickableSettings();
1397
1398        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1399        prepareCursorControllers();
1400    }
1401
1402    private void fixFocusableAndClickableSettings() {
1403        if ((mMovement != null) || mInput != null) {
1404            setFocusable(true);
1405            setClickable(true);
1406            setLongClickable(true);
1407        } else {
1408            setFocusable(false);
1409            setClickable(false);
1410            setLongClickable(false);
1411        }
1412    }
1413
1414    /**
1415     * @return the current transformation method for this TextView.
1416     * This will frequently be null except for single-line and password
1417     * fields.
1418     */
1419    public final TransformationMethod getTransformationMethod() {
1420        return mTransformation;
1421    }
1422
1423    /**
1424     * Sets the transformation that is applied to the text that this
1425     * TextView is displaying.
1426     *
1427     * @attr ref android.R.styleable#TextView_password
1428     * @attr ref android.R.styleable#TextView_singleLine
1429     */
1430    public final void setTransformationMethod(TransformationMethod method) {
1431        if (method == mTransformation) {
1432            // Avoid the setText() below if the transformation is
1433            // the same.
1434            return;
1435        }
1436        if (mTransformation != null) {
1437            if (mText instanceof Spannable) {
1438                ((Spannable) mText).removeSpan(mTransformation);
1439            }
1440        }
1441
1442        mTransformation = method;
1443
1444        if (method instanceof TransformationMethod2) {
1445            TransformationMethod2 method2 = (TransformationMethod2) method;
1446            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1447            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1448        } else {
1449            mAllowTransformationLengthChange = false;
1450        }
1451
1452        setText(mText);
1453    }
1454
1455    /**
1456     * Returns the top padding of the view, plus space for the top
1457     * Drawable if any.
1458     */
1459    public int getCompoundPaddingTop() {
1460        final Drawables dr = mDrawables;
1461        if (dr == null || dr.mDrawableTop == null) {
1462            return mPaddingTop;
1463        } else {
1464            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1465        }
1466    }
1467
1468    /**
1469     * Returns the bottom padding of the view, plus space for the bottom
1470     * Drawable if any.
1471     */
1472    public int getCompoundPaddingBottom() {
1473        final Drawables dr = mDrawables;
1474        if (dr == null || dr.mDrawableBottom == null) {
1475            return mPaddingBottom;
1476        } else {
1477            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1478        }
1479    }
1480
1481    /**
1482     * Returns the left padding of the view, plus space for the left
1483     * Drawable if any.
1484     */
1485    public int getCompoundPaddingLeft() {
1486        final Drawables dr = mDrawables;
1487        if (dr == null || dr.mDrawableLeft == null) {
1488            return mPaddingLeft;
1489        } else {
1490            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1491        }
1492    }
1493
1494    /**
1495     * Returns the right padding of the view, plus space for the right
1496     * Drawable if any.
1497     */
1498    public int getCompoundPaddingRight() {
1499        final Drawables dr = mDrawables;
1500        if (dr == null || dr.mDrawableRight == null) {
1501            return mPaddingRight;
1502        } else {
1503            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1504        }
1505    }
1506
1507    /**
1508     * Returns the start padding of the view, plus space for the start
1509     * Drawable if any.
1510     *
1511     * @hide
1512     */
1513    public int getCompoundPaddingStart() {
1514        resolveDrawables();
1515        switch(getResolvedLayoutDirection()) {
1516            default:
1517            case LAYOUT_DIRECTION_LTR:
1518                return getCompoundPaddingLeft();
1519            case LAYOUT_DIRECTION_RTL:
1520                return getCompoundPaddingRight();
1521        }
1522    }
1523
1524    /**
1525     * Returns the end padding of the view, plus space for the end
1526     * Drawable if any.
1527     *
1528     * @hide
1529     */
1530    public int getCompoundPaddingEnd() {
1531        resolveDrawables();
1532        switch(getResolvedLayoutDirection()) {
1533            default:
1534            case LAYOUT_DIRECTION_LTR:
1535                return getCompoundPaddingRight();
1536            case LAYOUT_DIRECTION_RTL:
1537                return getCompoundPaddingLeft();
1538        }
1539    }
1540
1541    /**
1542     * Returns the extended top padding of the view, including both the
1543     * top Drawable if any and any extra space to keep more than maxLines
1544     * of text from showing.  It is only valid to call this after measuring.
1545     */
1546    public int getExtendedPaddingTop() {
1547        if (mMaxMode != LINES) {
1548            return getCompoundPaddingTop();
1549        }
1550
1551        if (mLayout.getLineCount() <= mMaximum) {
1552            return getCompoundPaddingTop();
1553        }
1554
1555        int top = getCompoundPaddingTop();
1556        int bottom = getCompoundPaddingBottom();
1557        int viewht = getHeight() - top - bottom;
1558        int layoutht = mLayout.getLineTop(mMaximum);
1559
1560        if (layoutht >= viewht) {
1561            return top;
1562        }
1563
1564        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1565        if (gravity == Gravity.TOP) {
1566            return top;
1567        } else if (gravity == Gravity.BOTTOM) {
1568            return top + viewht - layoutht;
1569        } else { // (gravity == Gravity.CENTER_VERTICAL)
1570            return top + (viewht - layoutht) / 2;
1571        }
1572    }
1573
1574    /**
1575     * Returns the extended bottom padding of the view, including both the
1576     * bottom Drawable if any and any extra space to keep more than maxLines
1577     * of text from showing.  It is only valid to call this after measuring.
1578     */
1579    public int getExtendedPaddingBottom() {
1580        if (mMaxMode != LINES) {
1581            return getCompoundPaddingBottom();
1582        }
1583
1584        if (mLayout.getLineCount() <= mMaximum) {
1585            return getCompoundPaddingBottom();
1586        }
1587
1588        int top = getCompoundPaddingTop();
1589        int bottom = getCompoundPaddingBottom();
1590        int viewht = getHeight() - top - bottom;
1591        int layoutht = mLayout.getLineTop(mMaximum);
1592
1593        if (layoutht >= viewht) {
1594            return bottom;
1595        }
1596
1597        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1598        if (gravity == Gravity.TOP) {
1599            return bottom + viewht - layoutht;
1600        } else if (gravity == Gravity.BOTTOM) {
1601            return bottom;
1602        } else { // (gravity == Gravity.CENTER_VERTICAL)
1603            return bottom + (viewht - layoutht) / 2;
1604        }
1605    }
1606
1607    /**
1608     * Returns the total left padding of the view, including the left
1609     * Drawable if any.
1610     */
1611    public int getTotalPaddingLeft() {
1612        return getCompoundPaddingLeft();
1613    }
1614
1615    /**
1616     * Returns the total right padding of the view, including the right
1617     * Drawable if any.
1618     */
1619    public int getTotalPaddingRight() {
1620        return getCompoundPaddingRight();
1621    }
1622
1623    /**
1624     * Returns the total start padding of the view, including the start
1625     * Drawable if any.
1626     *
1627     * @hide
1628     */
1629    public int getTotalPaddingStart() {
1630        return getCompoundPaddingStart();
1631    }
1632
1633    /**
1634     * Returns the total end padding of the view, including the end
1635     * Drawable if any.
1636     *
1637     * @hide
1638     */
1639    public int getTotalPaddingEnd() {
1640        return getCompoundPaddingEnd();
1641    }
1642
1643    /**
1644     * Returns the total top padding of the view, including the top
1645     * Drawable if any, the extra space to keep more than maxLines
1646     * from showing, and the vertical offset for gravity, if any.
1647     */
1648    public int getTotalPaddingTop() {
1649        return getExtendedPaddingTop() + getVerticalOffset(true);
1650    }
1651
1652    /**
1653     * Returns the total bottom padding of the view, including the bottom
1654     * Drawable if any, the extra space to keep more than maxLines
1655     * from showing, and the vertical offset for gravity, if any.
1656     */
1657    public int getTotalPaddingBottom() {
1658        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1659    }
1660
1661    /**
1662     * Sets the Drawables (if any) to appear to the left of, above,
1663     * to the right of, and below the text.  Use null if you do not
1664     * want a Drawable there.  The Drawables must already have had
1665     * {@link Drawable#setBounds} called.
1666     *
1667     * @attr ref android.R.styleable#TextView_drawableLeft
1668     * @attr ref android.R.styleable#TextView_drawableTop
1669     * @attr ref android.R.styleable#TextView_drawableRight
1670     * @attr ref android.R.styleable#TextView_drawableBottom
1671     */
1672    public void setCompoundDrawables(Drawable left, Drawable top,
1673                                     Drawable right, Drawable bottom) {
1674        Drawables dr = mDrawables;
1675
1676        final boolean drawables = left != null || top != null
1677                || right != null || bottom != null;
1678
1679        if (!drawables) {
1680            // Clearing drawables...  can we free the data structure?
1681            if (dr != null) {
1682                if (dr.mDrawablePadding == 0) {
1683                    mDrawables = null;
1684                } else {
1685                    // We need to retain the last set padding, so just clear
1686                    // out all of the fields in the existing structure.
1687                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1688                    dr.mDrawableLeft = null;
1689                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1690                    dr.mDrawableTop = null;
1691                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1692                    dr.mDrawableRight = null;
1693                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1694                    dr.mDrawableBottom = null;
1695                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1696                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1697                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1698                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1699                }
1700            }
1701        } else {
1702            if (dr == null) {
1703                mDrawables = dr = new Drawables();
1704            }
1705
1706            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1707                dr.mDrawableLeft.setCallback(null);
1708            }
1709            dr.mDrawableLeft = left;
1710
1711            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1712                dr.mDrawableTop.setCallback(null);
1713            }
1714            dr.mDrawableTop = top;
1715
1716            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1717                dr.mDrawableRight.setCallback(null);
1718            }
1719            dr.mDrawableRight = right;
1720
1721            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1722                dr.mDrawableBottom.setCallback(null);
1723            }
1724            dr.mDrawableBottom = bottom;
1725
1726            final Rect compoundRect = dr.mCompoundRect;
1727            int[] state;
1728
1729            state = getDrawableState();
1730
1731            if (left != null) {
1732                left.setState(state);
1733                left.copyBounds(compoundRect);
1734                left.setCallback(this);
1735                dr.mDrawableSizeLeft = compoundRect.width();
1736                dr.mDrawableHeightLeft = compoundRect.height();
1737            } else {
1738                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1739            }
1740
1741            if (right != null) {
1742                right.setState(state);
1743                right.copyBounds(compoundRect);
1744                right.setCallback(this);
1745                dr.mDrawableSizeRight = compoundRect.width();
1746                dr.mDrawableHeightRight = compoundRect.height();
1747            } else {
1748                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1749            }
1750
1751            if (top != null) {
1752                top.setState(state);
1753                top.copyBounds(compoundRect);
1754                top.setCallback(this);
1755                dr.mDrawableSizeTop = compoundRect.height();
1756                dr.mDrawableWidthTop = compoundRect.width();
1757            } else {
1758                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1759            }
1760
1761            if (bottom != null) {
1762                bottom.setState(state);
1763                bottom.copyBounds(compoundRect);
1764                bottom.setCallback(this);
1765                dr.mDrawableSizeBottom = compoundRect.height();
1766                dr.mDrawableWidthBottom = compoundRect.width();
1767            } else {
1768                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1769            }
1770        }
1771
1772        invalidate();
1773        requestLayout();
1774    }
1775
1776    /**
1777     * Sets the Drawables (if any) to appear to the left of, above,
1778     * to the right of, and below the text.  Use 0 if you do not
1779     * want a Drawable there. The Drawables' bounds will be set to
1780     * their intrinsic bounds.
1781     *
1782     * @param left Resource identifier of the left Drawable.
1783     * @param top Resource identifier of the top Drawable.
1784     * @param right Resource identifier of the right Drawable.
1785     * @param bottom Resource identifier of the bottom Drawable.
1786     *
1787     * @attr ref android.R.styleable#TextView_drawableLeft
1788     * @attr ref android.R.styleable#TextView_drawableTop
1789     * @attr ref android.R.styleable#TextView_drawableRight
1790     * @attr ref android.R.styleable#TextView_drawableBottom
1791     */
1792    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1793        final Resources resources = getContext().getResources();
1794        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1795                top != 0 ? resources.getDrawable(top) : null,
1796                right != 0 ? resources.getDrawable(right) : null,
1797                bottom != 0 ? resources.getDrawable(bottom) : null);
1798    }
1799
1800    /**
1801     * Sets the Drawables (if any) to appear to the left of, above,
1802     * to the right of, and below the text.  Use null if you do not
1803     * want a Drawable there. The Drawables' bounds will be set to
1804     * their intrinsic bounds.
1805     *
1806     * @attr ref android.R.styleable#TextView_drawableLeft
1807     * @attr ref android.R.styleable#TextView_drawableTop
1808     * @attr ref android.R.styleable#TextView_drawableRight
1809     * @attr ref android.R.styleable#TextView_drawableBottom
1810     */
1811    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1812            Drawable right, Drawable bottom) {
1813
1814        if (left != null) {
1815            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1816        }
1817        if (right != null) {
1818            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1819        }
1820        if (top != null) {
1821            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1822        }
1823        if (bottom != null) {
1824            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1825        }
1826        setCompoundDrawables(left, top, right, bottom);
1827    }
1828
1829    /**
1830     * Sets the Drawables (if any) to appear to the start of, above,
1831     * to the end of, and below the text.  Use null if you do not
1832     * want a Drawable there.  The Drawables must already have had
1833     * {@link Drawable#setBounds} called.
1834     *
1835     * @attr ref android.R.styleable#TextView_drawableStart
1836     * @attr ref android.R.styleable#TextView_drawableTop
1837     * @attr ref android.R.styleable#TextView_drawableEnd
1838     * @attr ref android.R.styleable#TextView_drawableBottom
1839     *
1840     * @hide
1841     */
1842    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1843                                     Drawable end, Drawable bottom) {
1844        Drawables dr = mDrawables;
1845
1846        final boolean drawables = start != null || top != null
1847                || end != null || bottom != null;
1848
1849        if (!drawables) {
1850            // Clearing drawables...  can we free the data structure?
1851            if (dr != null) {
1852                if (dr.mDrawablePadding == 0) {
1853                    mDrawables = null;
1854                } else {
1855                    // We need to retain the last set padding, so just clear
1856                    // out all of the fields in the existing structure.
1857                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1858                    dr.mDrawableStart = null;
1859                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1860                    dr.mDrawableTop = null;
1861                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1862                    dr.mDrawableEnd = null;
1863                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1864                    dr.mDrawableBottom = null;
1865                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1866                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1867                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1868                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1869                }
1870            }
1871        } else {
1872            if (dr == null) {
1873                mDrawables = dr = new Drawables();
1874            }
1875
1876            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1877                dr.mDrawableStart.setCallback(null);
1878            }
1879            dr.mDrawableStart = start;
1880
1881            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1882                dr.mDrawableTop.setCallback(null);
1883            }
1884            dr.mDrawableTop = top;
1885
1886            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1887                dr.mDrawableEnd.setCallback(null);
1888            }
1889            dr.mDrawableEnd = end;
1890
1891            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1892                dr.mDrawableBottom.setCallback(null);
1893            }
1894            dr.mDrawableBottom = bottom;
1895
1896            final Rect compoundRect = dr.mCompoundRect;
1897            int[] state;
1898
1899            state = getDrawableState();
1900
1901            if (start != null) {
1902                start.setState(state);
1903                start.copyBounds(compoundRect);
1904                start.setCallback(this);
1905                dr.mDrawableSizeStart = compoundRect.width();
1906                dr.mDrawableHeightStart = compoundRect.height();
1907            } else {
1908                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1909            }
1910
1911            if (end != null) {
1912                end.setState(state);
1913                end.copyBounds(compoundRect);
1914                end.setCallback(this);
1915                dr.mDrawableSizeEnd = compoundRect.width();
1916                dr.mDrawableHeightEnd = compoundRect.height();
1917            } else {
1918                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1919            }
1920
1921            if (top != null) {
1922                top.setState(state);
1923                top.copyBounds(compoundRect);
1924                top.setCallback(this);
1925                dr.mDrawableSizeTop = compoundRect.height();
1926                dr.mDrawableWidthTop = compoundRect.width();
1927            } else {
1928                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1929            }
1930
1931            if (bottom != null) {
1932                bottom.setState(state);
1933                bottom.copyBounds(compoundRect);
1934                bottom.setCallback(this);
1935                dr.mDrawableSizeBottom = compoundRect.height();
1936                dr.mDrawableWidthBottom = compoundRect.width();
1937            } else {
1938                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1939            }
1940        }
1941
1942        resolveDrawables();
1943        invalidate();
1944        requestLayout();
1945    }
1946
1947    /**
1948     * Sets the Drawables (if any) to appear to the start of, above,
1949     * to the end of, and below the text.  Use 0 if you do not
1950     * want a Drawable there. The Drawables' bounds will be set to
1951     * their intrinsic bounds.
1952     *
1953     * @param start Resource identifier of the start Drawable.
1954     * @param top Resource identifier of the top Drawable.
1955     * @param end Resource identifier of the end Drawable.
1956     * @param bottom Resource identifier of the bottom Drawable.
1957     *
1958     * @attr ref android.R.styleable#TextView_drawableStart
1959     * @attr ref android.R.styleable#TextView_drawableTop
1960     * @attr ref android.R.styleable#TextView_drawableEnd
1961     * @attr ref android.R.styleable#TextView_drawableBottom
1962     *
1963     * @hide
1964     */
1965    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1966            int bottom) {
1967        resetResolvedDrawables();
1968        final Resources resources = getContext().getResources();
1969        setCompoundDrawablesRelativeWithIntrinsicBounds(
1970                start != 0 ? resources.getDrawable(start) : null,
1971                top != 0 ? resources.getDrawable(top) : null,
1972                end != 0 ? resources.getDrawable(end) : null,
1973                bottom != 0 ? resources.getDrawable(bottom) : null);
1974    }
1975
1976    /**
1977     * Sets the Drawables (if any) to appear to the start of, above,
1978     * to the end of, and below the text.  Use null if you do not
1979     * want a Drawable there. The Drawables' bounds will be set to
1980     * their intrinsic bounds.
1981     *
1982     * @attr ref android.R.styleable#TextView_drawableStart
1983     * @attr ref android.R.styleable#TextView_drawableTop
1984     * @attr ref android.R.styleable#TextView_drawableEnd
1985     * @attr ref android.R.styleable#TextView_drawableBottom
1986     *
1987     * @hide
1988     */
1989    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1990            Drawable end, Drawable bottom) {
1991
1992        resetResolvedDrawables();
1993        if (start != null) {
1994            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1995        }
1996        if (end != null) {
1997            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1998        }
1999        if (top != null) {
2000            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
2001        }
2002        if (bottom != null) {
2003            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2004        }
2005        setCompoundDrawablesRelative(start, top, end, bottom);
2006    }
2007
2008    /**
2009     * Returns drawables for the left, top, right, and bottom borders.
2010     */
2011    public Drawable[] getCompoundDrawables() {
2012        final Drawables dr = mDrawables;
2013        if (dr != null) {
2014            return new Drawable[] {
2015                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2016            };
2017        } else {
2018            return new Drawable[] { null, null, null, null };
2019        }
2020    }
2021
2022    /**
2023     * Returns drawables for the start, top, end, and bottom borders.
2024     *
2025     * @hide
2026     */
2027    public Drawable[] getCompoundDrawablesRelative() {
2028        final Drawables dr = mDrawables;
2029        if (dr != null) {
2030            return new Drawable[] {
2031                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2032            };
2033        } else {
2034            return new Drawable[] { null, null, null, null };
2035        }
2036    }
2037
2038    /**
2039     * Sets the size of the padding between the compound drawables and
2040     * the text.
2041     *
2042     * @attr ref android.R.styleable#TextView_drawablePadding
2043     */
2044    public void setCompoundDrawablePadding(int pad) {
2045        Drawables dr = mDrawables;
2046        if (pad == 0) {
2047            if (dr != null) {
2048                dr.mDrawablePadding = pad;
2049            }
2050        } else {
2051            if (dr == null) {
2052                mDrawables = dr = new Drawables();
2053            }
2054            dr.mDrawablePadding = pad;
2055        }
2056
2057        invalidate();
2058        requestLayout();
2059    }
2060
2061    /**
2062     * Returns the padding between the compound drawables and the text.
2063     */
2064    public int getCompoundDrawablePadding() {
2065        final Drawables dr = mDrawables;
2066        return dr != null ? dr.mDrawablePadding : 0;
2067    }
2068
2069    @Override
2070    public void setPadding(int left, int top, int right, int bottom) {
2071        if (left != mPaddingLeft ||
2072            right != mPaddingRight ||
2073            top != mPaddingTop ||
2074            bottom != mPaddingBottom) {
2075            nullLayouts();
2076        }
2077
2078        // the super call will requestLayout()
2079        super.setPadding(left, top, right, bottom);
2080        invalidate();
2081    }
2082
2083    /**
2084     * Gets the autolink mask of the text.  See {@link
2085     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2086     * possible values.
2087     *
2088     * @attr ref android.R.styleable#TextView_autoLink
2089     */
2090    public final int getAutoLinkMask() {
2091        return mAutoLinkMask;
2092    }
2093
2094    /**
2095     * Sets the text color, size, style, hint color, and highlight color
2096     * from the specified TextAppearance resource.
2097     */
2098    public void setTextAppearance(Context context, int resid) {
2099        TypedArray appearance =
2100            context.obtainStyledAttributes(resid,
2101                                           com.android.internal.R.styleable.TextAppearance);
2102
2103        int color;
2104        ColorStateList colors;
2105        int ts;
2106
2107        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2108        if (color != 0) {
2109            setHighlightColor(color);
2110        }
2111
2112        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2113                                              TextAppearance_textColor);
2114        if (colors != null) {
2115            setTextColor(colors);
2116        }
2117
2118        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2119                                              TextAppearance_textSize, 0);
2120        if (ts != 0) {
2121            setRawTextSize(ts);
2122        }
2123
2124        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2125                                              TextAppearance_textColorHint);
2126        if (colors != null) {
2127            setHintTextColor(colors);
2128        }
2129
2130        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2131                                              TextAppearance_textColorLink);
2132        if (colors != null) {
2133            setLinkTextColor(colors);
2134        }
2135
2136        int typefaceIndex, styleIndex;
2137
2138        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2139                                          TextAppearance_typeface, -1);
2140        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2141                                       TextAppearance_textStyle, -1);
2142
2143        setTypefaceByIndex(typefaceIndex, styleIndex);
2144
2145        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2146                false)) {
2147            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2148        }
2149
2150        appearance.recycle();
2151    }
2152
2153    /**
2154     * @return the size (in pixels) of the default text size in this TextView.
2155     */
2156    public float getTextSize() {
2157        return mTextPaint.getTextSize();
2158    }
2159
2160    /**
2161     * Set the default text size to the given value, interpreted as "scaled
2162     * pixel" units.  This size is adjusted based on the current density and
2163     * user font size preference.
2164     *
2165     * @param size The scaled pixel size.
2166     *
2167     * @attr ref android.R.styleable#TextView_textSize
2168     */
2169    @android.view.RemotableViewMethod
2170    public void setTextSize(float size) {
2171        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2172    }
2173
2174    /**
2175     * Set the default text size to a given unit and value.  See {@link
2176     * TypedValue} for the possible dimension units.
2177     *
2178     * @param unit The desired dimension unit.
2179     * @param size The desired size in the given units.
2180     *
2181     * @attr ref android.R.styleable#TextView_textSize
2182     */
2183    public void setTextSize(int unit, float size) {
2184        Context c = getContext();
2185        Resources r;
2186
2187        if (c == null)
2188            r = Resources.getSystem();
2189        else
2190            r = c.getResources();
2191
2192        setRawTextSize(TypedValue.applyDimension(
2193            unit, size, r.getDisplayMetrics()));
2194    }
2195
2196    private void setRawTextSize(float size) {
2197        if (size != mTextPaint.getTextSize()) {
2198            mTextPaint.setTextSize(size);
2199
2200            if (mLayout != null) {
2201                nullLayouts();
2202                requestLayout();
2203                invalidate();
2204            }
2205        }
2206    }
2207
2208    /**
2209     * @return the extent by which text is currently being stretched
2210     * horizontally.  This will usually be 1.
2211     */
2212    public float getTextScaleX() {
2213        return mTextPaint.getTextScaleX();
2214    }
2215
2216    /**
2217     * Sets the extent by which text should be stretched horizontally.
2218     *
2219     * @attr ref android.R.styleable#TextView_textScaleX
2220     */
2221    @android.view.RemotableViewMethod
2222    public void setTextScaleX(float size) {
2223        if (size != mTextPaint.getTextScaleX()) {
2224            mUserSetTextScaleX = true;
2225            mTextPaint.setTextScaleX(size);
2226
2227            if (mLayout != null) {
2228                nullLayouts();
2229                requestLayout();
2230                invalidate();
2231            }
2232        }
2233    }
2234
2235    /**
2236     * Sets the typeface and style in which the text should be displayed.
2237     * Note that not all Typeface families actually have bold and italic
2238     * variants, so you may need to use
2239     * {@link #setTypeface(Typeface, int)} to get the appearance
2240     * that you actually want.
2241     *
2242     * @attr ref android.R.styleable#TextView_typeface
2243     * @attr ref android.R.styleable#TextView_textStyle
2244     */
2245    public void setTypeface(Typeface tf) {
2246        if (mTextPaint.getTypeface() != tf) {
2247            mTextPaint.setTypeface(tf);
2248
2249            if (mLayout != null) {
2250                nullLayouts();
2251                requestLayout();
2252                invalidate();
2253            }
2254        }
2255    }
2256
2257    /**
2258     * @return the current typeface and style in which the text is being
2259     * displayed.
2260     */
2261    public Typeface getTypeface() {
2262        return mTextPaint.getTypeface();
2263    }
2264
2265    /**
2266     * Sets the text color for all the states (normal, selected,
2267     * focused) to be this color.
2268     *
2269     * @attr ref android.R.styleable#TextView_textColor
2270     */
2271    @android.view.RemotableViewMethod
2272    public void setTextColor(int color) {
2273        mTextColor = ColorStateList.valueOf(color);
2274        updateTextColors();
2275    }
2276
2277    /**
2278     * Sets the text color.
2279     *
2280     * @attr ref android.R.styleable#TextView_textColor
2281     */
2282    public void setTextColor(ColorStateList colors) {
2283        if (colors == null) {
2284            throw new NullPointerException();
2285        }
2286
2287        mTextColor = colors;
2288        updateTextColors();
2289    }
2290
2291    /**
2292     * Return the set of text colors.
2293     *
2294     * @return Returns the set of text colors.
2295     */
2296    public final ColorStateList getTextColors() {
2297        return mTextColor;
2298    }
2299
2300    /**
2301     * <p>Return the current color selected for normal text.</p>
2302     *
2303     * @return Returns the current text color.
2304     */
2305    public final int getCurrentTextColor() {
2306        return mCurTextColor;
2307    }
2308
2309    /**
2310     * Sets the color used to display the selection highlight.
2311     *
2312     * @attr ref android.R.styleable#TextView_textColorHighlight
2313     */
2314    @android.view.RemotableViewMethod
2315    public void setHighlightColor(int color) {
2316        if (mHighlightColor != color) {
2317            mHighlightColor = color;
2318            invalidate();
2319        }
2320    }
2321
2322    /**
2323     * Gives the text a shadow of the specified radius and color, the specified
2324     * distance from its normal position.
2325     *
2326     * @attr ref android.R.styleable#TextView_shadowColor
2327     * @attr ref android.R.styleable#TextView_shadowDx
2328     * @attr ref android.R.styleable#TextView_shadowDy
2329     * @attr ref android.R.styleable#TextView_shadowRadius
2330     */
2331    public void setShadowLayer(float radius, float dx, float dy, int color) {
2332        mTextPaint.setShadowLayer(radius, dx, dy, color);
2333
2334        mShadowRadius = radius;
2335        mShadowDx = dx;
2336        mShadowDy = dy;
2337
2338        invalidate();
2339    }
2340
2341    /**
2342     * @return the base paint used for the text.  Please use this only to
2343     * consult the Paint's properties and not to change them.
2344     */
2345    public TextPaint getPaint() {
2346        return mTextPaint;
2347    }
2348
2349    /**
2350     * Sets the autolink mask of the text.  See {@link
2351     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2352     * possible values.
2353     *
2354     * @attr ref android.R.styleable#TextView_autoLink
2355     */
2356    @android.view.RemotableViewMethod
2357    public final void setAutoLinkMask(int mask) {
2358        mAutoLinkMask = mask;
2359    }
2360
2361    /**
2362     * Sets whether the movement method will automatically be set to
2363     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2364     * set to nonzero and links are detected in {@link #setText}.
2365     * The default is true.
2366     *
2367     * @attr ref android.R.styleable#TextView_linksClickable
2368     */
2369    @android.view.RemotableViewMethod
2370    public final void setLinksClickable(boolean whether) {
2371        mLinksClickable = whether;
2372    }
2373
2374    /**
2375     * Returns whether the movement method will automatically be set to
2376     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2377     * set to nonzero and links are detected in {@link #setText}.
2378     * The default is true.
2379     *
2380     * @attr ref android.R.styleable#TextView_linksClickable
2381     */
2382    public final boolean getLinksClickable() {
2383        return mLinksClickable;
2384    }
2385
2386    /**
2387     * Sets whether the soft input method will be made visible when this
2388     * TextView gets focused. The default is true.
2389     *
2390     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2391     * @hide
2392     */
2393    @android.view.RemotableViewMethod
2394    public final void setSoftInputShownOnFocus(boolean show) {
2395        mSoftInputShownOnFocus = show;
2396    }
2397
2398    /**
2399     * Returns whether the soft input method will be made visible when this
2400     * TextView gets focused. The default is true.
2401     *
2402     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2403     * @hide
2404     */
2405    public final boolean getSoftInputShownOnFocus() {
2406        return mSoftInputShownOnFocus;
2407    }
2408
2409    /**
2410     * Returns the list of URLSpans attached to the text
2411     * (by {@link Linkify} or otherwise) if any.  You can call
2412     * {@link URLSpan#getURL} on them to find where they link to
2413     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2414     * to find the region of the text they are attached to.
2415     */
2416    public URLSpan[] getUrls() {
2417        if (mText instanceof Spanned) {
2418            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2419        } else {
2420            return new URLSpan[0];
2421        }
2422    }
2423
2424    /**
2425     * Sets the color of the hint text.
2426     *
2427     * @attr ref android.R.styleable#TextView_textColorHint
2428     */
2429    @android.view.RemotableViewMethod
2430    public final void setHintTextColor(int color) {
2431        mHintTextColor = ColorStateList.valueOf(color);
2432        updateTextColors();
2433    }
2434
2435    /**
2436     * Sets the color of the hint text.
2437     *
2438     * @attr ref android.R.styleable#TextView_textColorHint
2439     */
2440    public final void setHintTextColor(ColorStateList colors) {
2441        mHintTextColor = colors;
2442        updateTextColors();
2443    }
2444
2445    /**
2446     * <p>Return the color used to paint the hint text.</p>
2447     *
2448     * @return Returns the list of hint text colors.
2449     */
2450    public final ColorStateList getHintTextColors() {
2451        return mHintTextColor;
2452    }
2453
2454    /**
2455     * <p>Return the current color selected to paint the hint text.</p>
2456     *
2457     * @return Returns the current hint text color.
2458     */
2459    public final int getCurrentHintTextColor() {
2460        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2461    }
2462
2463    /**
2464     * Sets the color of links in the text.
2465     *
2466     * @attr ref android.R.styleable#TextView_textColorLink
2467     */
2468    @android.view.RemotableViewMethod
2469    public final void setLinkTextColor(int color) {
2470        mLinkTextColor = ColorStateList.valueOf(color);
2471        updateTextColors();
2472    }
2473
2474    /**
2475     * Sets the color of links in the text.
2476     *
2477     * @attr ref android.R.styleable#TextView_textColorLink
2478     */
2479    public final void setLinkTextColor(ColorStateList colors) {
2480        mLinkTextColor = colors;
2481        updateTextColors();
2482    }
2483
2484    /**
2485     * <p>Returns the color used to paint links in the text.</p>
2486     *
2487     * @return Returns the list of link text colors.
2488     */
2489    public final ColorStateList getLinkTextColors() {
2490        return mLinkTextColor;
2491    }
2492
2493    /**
2494     * Sets the horizontal alignment of the text and the
2495     * vertical gravity that will be used when there is extra space
2496     * in the TextView beyond what is required for the text itself.
2497     *
2498     * @see android.view.Gravity
2499     * @attr ref android.R.styleable#TextView_gravity
2500     */
2501    public void setGravity(int gravity) {
2502        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2503            gravity |= Gravity.START;
2504        }
2505        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2506            gravity |= Gravity.TOP;
2507        }
2508
2509        boolean newLayout = false;
2510
2511        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2512            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2513            newLayout = true;
2514        }
2515
2516        if (gravity != mGravity) {
2517            invalidate();
2518            mLayoutAlignment = null;
2519        }
2520
2521        mGravity = gravity;
2522
2523        if (mLayout != null && newLayout) {
2524            // XXX this is heavy-handed because no actual content changes.
2525            int want = mLayout.getWidth();
2526            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2527
2528            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2529                          mRight - mLeft - getCompoundPaddingLeft() -
2530                          getCompoundPaddingRight(), true);
2531        }
2532    }
2533
2534    /**
2535     * Returns the horizontal and vertical alignment of this TextView.
2536     *
2537     * @see android.view.Gravity
2538     * @attr ref android.R.styleable#TextView_gravity
2539     */
2540    public int getGravity() {
2541        return mGravity;
2542    }
2543
2544    /**
2545     * @return the flags on the Paint being used to display the text.
2546     * @see Paint#getFlags
2547     */
2548    public int getPaintFlags() {
2549        return mTextPaint.getFlags();
2550    }
2551
2552    /**
2553     * Sets flags on the Paint being used to display the text and
2554     * reflows the text if they are different from the old flags.
2555     * @see Paint#setFlags
2556     */
2557    @android.view.RemotableViewMethod
2558    public void setPaintFlags(int flags) {
2559        if (mTextPaint.getFlags() != flags) {
2560            mTextPaint.setFlags(flags);
2561
2562            if (mLayout != null) {
2563                nullLayouts();
2564                requestLayout();
2565                invalidate();
2566            }
2567        }
2568    }
2569
2570    /**
2571     * Sets whether the text should be allowed to be wider than the
2572     * View is.  If false, it will be wrapped to the width of the View.
2573     *
2574     * @attr ref android.R.styleable#TextView_scrollHorizontally
2575     */
2576    public void setHorizontallyScrolling(boolean whether) {
2577        if (mHorizontallyScrolling != whether) {
2578            mHorizontallyScrolling = whether;
2579
2580            if (mLayout != null) {
2581                nullLayouts();
2582                requestLayout();
2583                invalidate();
2584            }
2585        }
2586    }
2587
2588    /**
2589     * Returns whether the text is allowed to be wider than the View is.
2590     * If false, the text will be wrapped to the width of the View.
2591     *
2592     * @attr ref android.R.styleable#TextView_scrollHorizontally
2593     * @hide
2594     */
2595    public boolean getHorizontallyScrolling() {
2596        return mHorizontallyScrolling;
2597    }
2598
2599    /**
2600     * Makes the TextView at least this many lines tall.
2601     *
2602     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2603     * set this value to 1.
2604     *
2605     * @attr ref android.R.styleable#TextView_minLines
2606     */
2607    @android.view.RemotableViewMethod
2608    public void setMinLines(int minlines) {
2609        mMinimum = minlines;
2610        mMinMode = LINES;
2611
2612        requestLayout();
2613        invalidate();
2614    }
2615
2616    /**
2617     * Makes the TextView at least this many pixels tall.
2618     *
2619     * Setting this value overrides any other (minimum) number of lines setting.
2620     *
2621     * @attr ref android.R.styleable#TextView_minHeight
2622     */
2623    @android.view.RemotableViewMethod
2624    public void setMinHeight(int minHeight) {
2625        mMinimum = minHeight;
2626        mMinMode = PIXELS;
2627
2628        requestLayout();
2629        invalidate();
2630    }
2631
2632    /**
2633     * Makes the TextView at most this many lines tall.
2634     *
2635     * Setting this value overrides any other (maximum) height setting.
2636     *
2637     * @attr ref android.R.styleable#TextView_maxLines
2638     */
2639    @android.view.RemotableViewMethod
2640    public void setMaxLines(int maxlines) {
2641        mMaximum = maxlines;
2642        mMaxMode = LINES;
2643
2644        requestLayout();
2645        invalidate();
2646    }
2647
2648    /**
2649     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2650     * {@link #setMaxLines(int)} method.
2651     *
2652     * Setting this value overrides any other (maximum) number of lines setting.
2653     *
2654     * @attr ref android.R.styleable#TextView_maxHeight
2655     */
2656    @android.view.RemotableViewMethod
2657    public void setMaxHeight(int maxHeight) {
2658        mMaximum = maxHeight;
2659        mMaxMode = PIXELS;
2660
2661        requestLayout();
2662        invalidate();
2663    }
2664
2665    /**
2666     * Makes the TextView exactly this many lines tall.
2667     *
2668     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2669     * height setting. A single line TextView will set this value to 1.
2670     *
2671     * @attr ref android.R.styleable#TextView_lines
2672     */
2673    @android.view.RemotableViewMethod
2674    public void setLines(int lines) {
2675        mMaximum = mMinimum = lines;
2676        mMaxMode = mMinMode = LINES;
2677
2678        requestLayout();
2679        invalidate();
2680    }
2681
2682    /**
2683     * Makes the TextView exactly this many pixels tall.
2684     * You could do the same thing by specifying this number in the
2685     * LayoutParams.
2686     *
2687     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2688     * height setting.
2689     *
2690     * @attr ref android.R.styleable#TextView_height
2691     */
2692    @android.view.RemotableViewMethod
2693    public void setHeight(int pixels) {
2694        mMaximum = mMinimum = pixels;
2695        mMaxMode = mMinMode = PIXELS;
2696
2697        requestLayout();
2698        invalidate();
2699    }
2700
2701    /**
2702     * Makes the TextView at least this many ems wide
2703     *
2704     * @attr ref android.R.styleable#TextView_minEms
2705     */
2706    @android.view.RemotableViewMethod
2707    public void setMinEms(int minems) {
2708        mMinWidth = minems;
2709        mMinWidthMode = EMS;
2710
2711        requestLayout();
2712        invalidate();
2713    }
2714
2715    /**
2716     * Makes the TextView at least this many pixels wide
2717     *
2718     * @attr ref android.R.styleable#TextView_minWidth
2719     */
2720    @android.view.RemotableViewMethod
2721    public void setMinWidth(int minpixels) {
2722        mMinWidth = minpixels;
2723        mMinWidthMode = PIXELS;
2724
2725        requestLayout();
2726        invalidate();
2727    }
2728
2729    /**
2730     * Makes the TextView at most this many ems wide
2731     *
2732     * @attr ref android.R.styleable#TextView_maxEms
2733     */
2734    @android.view.RemotableViewMethod
2735    public void setMaxEms(int maxems) {
2736        mMaxWidth = maxems;
2737        mMaxWidthMode = EMS;
2738
2739        requestLayout();
2740        invalidate();
2741    }
2742
2743    /**
2744     * Makes the TextView at most this many pixels wide
2745     *
2746     * @attr ref android.R.styleable#TextView_maxWidth
2747     */
2748    @android.view.RemotableViewMethod
2749    public void setMaxWidth(int maxpixels) {
2750        mMaxWidth = maxpixels;
2751        mMaxWidthMode = PIXELS;
2752
2753        requestLayout();
2754        invalidate();
2755    }
2756
2757    /**
2758     * Makes the TextView exactly this many ems wide
2759     *
2760     * @attr ref android.R.styleable#TextView_ems
2761     */
2762    @android.view.RemotableViewMethod
2763    public void setEms(int ems) {
2764        mMaxWidth = mMinWidth = ems;
2765        mMaxWidthMode = mMinWidthMode = EMS;
2766
2767        requestLayout();
2768        invalidate();
2769    }
2770
2771    /**
2772     * Makes the TextView exactly this many pixels wide.
2773     * You could do the same thing by specifying this number in the
2774     * LayoutParams.
2775     *
2776     * @attr ref android.R.styleable#TextView_width
2777     */
2778    @android.view.RemotableViewMethod
2779    public void setWidth(int pixels) {
2780        mMaxWidth = mMinWidth = pixels;
2781        mMaxWidthMode = mMinWidthMode = PIXELS;
2782
2783        requestLayout();
2784        invalidate();
2785    }
2786
2787
2788    /**
2789     * Sets line spacing for this TextView.  Each line will have its height
2790     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2791     *
2792     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2793     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2794     */
2795    public void setLineSpacing(float add, float mult) {
2796        if (mSpacingAdd != add || mSpacingMult != mult) {
2797            mSpacingAdd = add;
2798            mSpacingMult = mult;
2799
2800            if (mLayout != null) {
2801                nullLayouts();
2802                requestLayout();
2803                invalidate();
2804            }
2805        }
2806    }
2807
2808    /**
2809     * Convenience method: Append the specified text to the TextView's
2810     * display buffer, upgrading it to BufferType.EDITABLE if it was
2811     * not already editable.
2812     */
2813    public final void append(CharSequence text) {
2814        append(text, 0, text.length());
2815    }
2816
2817    /**
2818     * Convenience method: Append the specified text slice to the TextView's
2819     * display buffer, upgrading it to BufferType.EDITABLE if it was
2820     * not already editable.
2821     */
2822    public void append(CharSequence text, int start, int end) {
2823        if (!(mText instanceof Editable)) {
2824            setText(mText, BufferType.EDITABLE);
2825        }
2826
2827        ((Editable) mText).append(text, start, end);
2828    }
2829
2830    private void updateTextColors() {
2831        boolean inval = false;
2832        int color = mTextColor.getColorForState(getDrawableState(), 0);
2833        if (color != mCurTextColor) {
2834            mCurTextColor = color;
2835            inval = true;
2836        }
2837        if (mLinkTextColor != null) {
2838            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2839            if (color != mTextPaint.linkColor) {
2840                mTextPaint.linkColor = color;
2841                inval = true;
2842            }
2843        }
2844        if (mHintTextColor != null) {
2845            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2846            if (color != mCurHintTextColor && mText.length() == 0) {
2847                mCurHintTextColor = color;
2848                inval = true;
2849            }
2850        }
2851        if (inval) {
2852            invalidate();
2853        }
2854    }
2855
2856    @Override
2857    protected void drawableStateChanged() {
2858        super.drawableStateChanged();
2859        if (mTextColor != null && mTextColor.isStateful()
2860                || (mHintTextColor != null && mHintTextColor.isStateful())
2861                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2862            updateTextColors();
2863        }
2864
2865        final Drawables dr = mDrawables;
2866        if (dr != null) {
2867            int[] state = getDrawableState();
2868            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2869                dr.mDrawableTop.setState(state);
2870            }
2871            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2872                dr.mDrawableBottom.setState(state);
2873            }
2874            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2875                dr.mDrawableLeft.setState(state);
2876            }
2877            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2878                dr.mDrawableRight.setState(state);
2879            }
2880            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2881                dr.mDrawableStart.setState(state);
2882            }
2883            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2884                dr.mDrawableEnd.setState(state);
2885            }
2886        }
2887    }
2888
2889    /**
2890     * User interface state that is stored by TextView for implementing
2891     * {@link View#onSaveInstanceState}.
2892     */
2893    public static class SavedState extends BaseSavedState {
2894        int selStart;
2895        int selEnd;
2896        CharSequence text;
2897        boolean frozenWithFocus;
2898        CharSequence error;
2899
2900        SavedState(Parcelable superState) {
2901            super(superState);
2902        }
2903
2904        @Override
2905        public void writeToParcel(Parcel out, int flags) {
2906            super.writeToParcel(out, flags);
2907            out.writeInt(selStart);
2908            out.writeInt(selEnd);
2909            out.writeInt(frozenWithFocus ? 1 : 0);
2910            TextUtils.writeToParcel(text, out, flags);
2911
2912            if (error == null) {
2913                out.writeInt(0);
2914            } else {
2915                out.writeInt(1);
2916                TextUtils.writeToParcel(error, out, flags);
2917            }
2918        }
2919
2920        @Override
2921        public String toString() {
2922            String str = "TextView.SavedState{"
2923                    + Integer.toHexString(System.identityHashCode(this))
2924                    + " start=" + selStart + " end=" + selEnd;
2925            if (text != null) {
2926                str += " text=" + text;
2927            }
2928            return str + "}";
2929        }
2930
2931        @SuppressWarnings("hiding")
2932        public static final Parcelable.Creator<SavedState> CREATOR
2933                = new Parcelable.Creator<SavedState>() {
2934            public SavedState createFromParcel(Parcel in) {
2935                return new SavedState(in);
2936            }
2937
2938            public SavedState[] newArray(int size) {
2939                return new SavedState[size];
2940            }
2941        };
2942
2943        private SavedState(Parcel in) {
2944            super(in);
2945            selStart = in.readInt();
2946            selEnd = in.readInt();
2947            frozenWithFocus = (in.readInt() != 0);
2948            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2949
2950            if (in.readInt() != 0) {
2951                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2952            }
2953        }
2954    }
2955
2956    @Override
2957    public Parcelable onSaveInstanceState() {
2958        Parcelable superState = super.onSaveInstanceState();
2959
2960        // Save state if we are forced to
2961        boolean save = mFreezesText;
2962        int start = 0;
2963        int end = 0;
2964
2965        if (mText != null) {
2966            start = getSelectionStart();
2967            end = getSelectionEnd();
2968            if (start >= 0 || end >= 0) {
2969                // Or save state if there is a selection
2970                save = true;
2971            }
2972        }
2973
2974        if (save) {
2975            SavedState ss = new SavedState(superState);
2976            // XXX Should also save the current scroll position!
2977            ss.selStart = start;
2978            ss.selEnd = end;
2979
2980            if (mText instanceof Spanned) {
2981                /*
2982                 * Calling setText() strips off any ChangeWatchers;
2983                 * strip them now to avoid leaking references.
2984                 * But do it to a copy so that if there are any
2985                 * further changes to the text of this view, it
2986                 * won't get into an inconsistent state.
2987                 */
2988
2989                Spannable sp = new SpannableString(mText);
2990
2991                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2992                    sp.removeSpan(cw);
2993                }
2994
2995                removeMisspelledSpans(sp);
2996                sp.removeSpan(mSuggestionRangeSpan);
2997
2998                ss.text = sp;
2999            } else {
3000                ss.text = mText.toString();
3001            }
3002
3003            if (isFocused() && start >= 0 && end >= 0) {
3004                ss.frozenWithFocus = true;
3005            }
3006
3007            ss.error = mError;
3008
3009            return ss;
3010        }
3011
3012        return superState;
3013    }
3014
3015    void removeMisspelledSpans(Spannable spannable) {
3016        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
3017                SuggestionSpan.class);
3018        for (int i = 0; i < suggestionSpans.length; i++) {
3019            int flags = suggestionSpans[i].getFlags();
3020            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
3021                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
3022                spannable.removeSpan(suggestionSpans[i]);
3023            }
3024        }
3025    }
3026
3027    @Override
3028    public void onRestoreInstanceState(Parcelable state) {
3029        if (!(state instanceof SavedState)) {
3030            super.onRestoreInstanceState(state);
3031            return;
3032        }
3033
3034        SavedState ss = (SavedState)state;
3035        super.onRestoreInstanceState(ss.getSuperState());
3036
3037        // XXX restore buffer type too, as well as lots of other stuff
3038        if (ss.text != null) {
3039            setText(ss.text);
3040        }
3041
3042        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3043            if (mText instanceof Spannable) {
3044                int len = mText.length();
3045
3046                if (ss.selStart > len || ss.selEnd > len) {
3047                    String restored = "";
3048
3049                    if (ss.text != null) {
3050                        restored = "(restored) ";
3051                    }
3052
3053                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3054                          "/" + ss.selEnd + " out of range for " + restored +
3055                          "text " + mText);
3056                } else {
3057                    Selection.setSelection((Spannable) mText, ss.selStart,
3058                                           ss.selEnd);
3059
3060                    if (ss.frozenWithFocus) {
3061                        mFrozenWithFocus = true;
3062                    }
3063                }
3064            }
3065        }
3066
3067        if (ss.error != null) {
3068            final CharSequence error = ss.error;
3069            // Display the error later, after the first layout pass
3070            post(new Runnable() {
3071                public void run() {
3072                    setError(error);
3073                }
3074            });
3075        }
3076    }
3077
3078    /**
3079     * Control whether this text view saves its entire text contents when
3080     * freezing to an icicle, in addition to dynamic state such as cursor
3081     * position.  By default this is false, not saving the text.  Set to true
3082     * if the text in the text view is not being saved somewhere else in
3083     * persistent storage (such as in a content provider) so that if the
3084     * view is later thawed the user will not lose their data.
3085     *
3086     * @param freezesText Controls whether a frozen icicle should include the
3087     * entire text data: true to include it, false to not.
3088     *
3089     * @attr ref android.R.styleable#TextView_freezesText
3090     */
3091    @android.view.RemotableViewMethod
3092    public void setFreezesText(boolean freezesText) {
3093        mFreezesText = freezesText;
3094    }
3095
3096    /**
3097     * Return whether this text view is including its entire text contents
3098     * in frozen icicles.
3099     *
3100     * @return Returns true if text is included, false if it isn't.
3101     *
3102     * @see #setFreezesText
3103     */
3104    public boolean getFreezesText() {
3105        return mFreezesText;
3106    }
3107
3108    ///////////////////////////////////////////////////////////////////////////
3109
3110    /**
3111     * Sets the Factory used to create new Editables.
3112     */
3113    public final void setEditableFactory(Editable.Factory factory) {
3114        mEditableFactory = factory;
3115        setText(mText);
3116    }
3117
3118    /**
3119     * Sets the Factory used to create new Spannables.
3120     */
3121    public final void setSpannableFactory(Spannable.Factory factory) {
3122        mSpannableFactory = factory;
3123        setText(mText);
3124    }
3125
3126    /**
3127     * Sets the string value of the TextView. TextView <em>does not</em> accept
3128     * HTML-like formatting, which you can do with text strings in XML resource files.
3129     * To style your strings, attach android.text.style.* objects to a
3130     * {@link android.text.SpannableString SpannableString}, or see the
3131     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3132     * Available Resource Types</a> documentation for an example of setting
3133     * formatted text in the XML resource file.
3134     *
3135     * @attr ref android.R.styleable#TextView_text
3136     */
3137    @android.view.RemotableViewMethod
3138    public final void setText(CharSequence text) {
3139        setText(text, mBufferType);
3140    }
3141
3142    /**
3143     * Like {@link #setText(CharSequence)},
3144     * except that the cursor position (if any) is retained in the new text.
3145     *
3146     * @param text The new text to place in the text view.
3147     *
3148     * @see #setText(CharSequence)
3149     */
3150    @android.view.RemotableViewMethod
3151    public final void setTextKeepState(CharSequence text) {
3152        setTextKeepState(text, mBufferType);
3153    }
3154
3155    /**
3156     * Sets the text that this TextView is to display (see
3157     * {@link #setText(CharSequence)}) and also sets whether it is stored
3158     * in a styleable/spannable buffer and whether it is editable.
3159     *
3160     * @attr ref android.R.styleable#TextView_text
3161     * @attr ref android.R.styleable#TextView_bufferType
3162     */
3163    public void setText(CharSequence text, BufferType type) {
3164        setText(text, type, true, 0);
3165
3166        if (mCharWrapper != null) {
3167            mCharWrapper.mChars = null;
3168        }
3169    }
3170
3171    private void setText(CharSequence text, BufferType type,
3172                         boolean notifyBefore, int oldlen) {
3173        if (text == null) {
3174            text = "";
3175        }
3176
3177        // If suggestions are not enabled, remove the suggestion spans from the text
3178        if (!isSuggestionsEnabled()) {
3179            text = removeSuggestionSpans(text);
3180        }
3181
3182        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3183
3184        if (text instanceof Spanned &&
3185            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3186            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3187                setHorizontalFadingEdgeEnabled(true);
3188                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3189            } else {
3190                setHorizontalFadingEdgeEnabled(false);
3191                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3192            }
3193            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3194        }
3195
3196        int n = mFilters.length;
3197        for (int i = 0; i < n; i++) {
3198            CharSequence out = mFilters[i].filter(text, 0, text.length(), EMPTY_SPANNED, 0, 0);
3199            if (out != null) {
3200                text = out;
3201            }
3202        }
3203
3204        if (notifyBefore) {
3205            if (mText != null) {
3206                oldlen = mText.length();
3207                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3208            } else {
3209                sendBeforeTextChanged("", 0, 0, text.length());
3210            }
3211        }
3212
3213        boolean needEditableForNotification = false;
3214
3215        if (mListeners != null && mListeners.size() != 0) {
3216            needEditableForNotification = true;
3217        }
3218
3219        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3220            Editable t = mEditableFactory.newEditable(text);
3221            text = t;
3222            setFilters(t, mFilters);
3223            InputMethodManager imm = InputMethodManager.peekInstance();
3224            if (imm != null) imm.restartInput(this);
3225        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3226            text = mSpannableFactory.newSpannable(text);
3227        } else if (!(text instanceof CharWrapper)) {
3228            text = TextUtils.stringOrSpannedString(text);
3229        }
3230
3231        if (mAutoLinkMask != 0) {
3232            Spannable s2;
3233
3234            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3235                s2 = (Spannable) text;
3236            } else {
3237                s2 = mSpannableFactory.newSpannable(text);
3238            }
3239
3240            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3241                text = s2;
3242                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3243
3244                /*
3245                 * We must go ahead and set the text before changing the
3246                 * movement method, because setMovementMethod() may call
3247                 * setText() again to try to upgrade the buffer type.
3248                 */
3249                mText = text;
3250
3251                // Do not change the movement method for text that support text selection as it
3252                // would prevent an arbitrary cursor displacement.
3253                if (mLinksClickable && !textCanBeSelected()) {
3254                    setMovementMethod(LinkMovementMethod.getInstance());
3255                }
3256            }
3257        }
3258
3259        mBufferType = type;
3260        mText = text;
3261
3262        if (mTransformation == null) {
3263            mTransformed = text;
3264        } else {
3265            mTransformed = mTransformation.getTransformation(text, this);
3266        }
3267
3268        final int textLength = text.length();
3269
3270        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3271            Spannable sp = (Spannable) text;
3272
3273            // Remove any ChangeWatchers that might have come
3274            // from other TextViews.
3275            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3276            final int count = watchers.length;
3277            for (int i = 0; i < count; i++)
3278                sp.removeSpan(watchers[i]);
3279
3280            if (mChangeWatcher == null)
3281                mChangeWatcher = new ChangeWatcher();
3282
3283            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3284                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3285
3286            if (mInput != null) {
3287                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3288            }
3289
3290            if (mTransformation != null) {
3291                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3292            }
3293
3294            if (mMovement != null) {
3295                mMovement.initialize(this, (Spannable) text);
3296
3297                /*
3298                 * Initializing the movement method will have set the
3299                 * selection, so reset mSelectionMoved to keep that from
3300                 * interfering with the normal on-focus selection-setting.
3301                 */
3302                mSelectionMoved = false;
3303            }
3304        }
3305
3306        if (mLayout != null) {
3307            checkForRelayout();
3308        }
3309
3310        sendOnTextChanged(text, 0, oldlen, textLength);
3311        onTextChanged(text, 0, oldlen, textLength);
3312
3313        if (needEditableForNotification) {
3314            sendAfterTextChanged((Editable) text);
3315        }
3316
3317        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3318        prepareCursorControllers();
3319    }
3320
3321    /**
3322     * Sets the TextView to display the specified slice of the specified
3323     * char array.  You must promise that you will not change the contents
3324     * of the array except for right before another call to setText(),
3325     * since the TextView has no way to know that the text
3326     * has changed and that it needs to invalidate and re-layout.
3327     */
3328    public final void setText(char[] text, int start, int len) {
3329        int oldlen = 0;
3330
3331        if (start < 0 || len < 0 || start + len > text.length) {
3332            throw new IndexOutOfBoundsException(start + ", " + len);
3333        }
3334
3335        /*
3336         * We must do the before-notification here ourselves because if
3337         * the old text is a CharWrapper we destroy it before calling
3338         * into the normal path.
3339         */
3340        if (mText != null) {
3341            oldlen = mText.length();
3342            sendBeforeTextChanged(mText, 0, oldlen, len);
3343        } else {
3344            sendBeforeTextChanged("", 0, 0, len);
3345        }
3346
3347        if (mCharWrapper == null) {
3348            mCharWrapper = new CharWrapper(text, start, len);
3349        } else {
3350            mCharWrapper.set(text, start, len);
3351        }
3352
3353        setText(mCharWrapper, mBufferType, false, oldlen);
3354    }
3355
3356    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3357        private char[] mChars;
3358        private int mStart, mLength;
3359
3360        public CharWrapper(char[] chars, int start, int len) {
3361            mChars = chars;
3362            mStart = start;
3363            mLength = len;
3364        }
3365
3366        /* package */ void set(char[] chars, int start, int len) {
3367            mChars = chars;
3368            mStart = start;
3369            mLength = len;
3370        }
3371
3372        public int length() {
3373            return mLength;
3374        }
3375
3376        public char charAt(int off) {
3377            return mChars[off + mStart];
3378        }
3379
3380        @Override
3381        public String toString() {
3382            return new String(mChars, mStart, mLength);
3383        }
3384
3385        public CharSequence subSequence(int start, int end) {
3386            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3387                throw new IndexOutOfBoundsException(start + ", " + end);
3388            }
3389
3390            return new String(mChars, start + mStart, end - start);
3391        }
3392
3393        public void getChars(int start, int end, char[] buf, int off) {
3394            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3395                throw new IndexOutOfBoundsException(start + ", " + end);
3396            }
3397
3398            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3399        }
3400
3401        public void drawText(Canvas c, int start, int end,
3402                             float x, float y, Paint p) {
3403            c.drawText(mChars, start + mStart, end - start, x, y, p);
3404        }
3405
3406        public void drawTextRun(Canvas c, int start, int end,
3407                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3408            int count = end - start;
3409            int contextCount = contextEnd - contextStart;
3410            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3411                    contextCount, x, y, flags, p);
3412        }
3413
3414        public float measureText(int start, int end, Paint p) {
3415            return p.measureText(mChars, start + mStart, end - start);
3416        }
3417
3418        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3419            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3420        }
3421
3422        public float getTextRunAdvances(int start, int end, int contextStart,
3423                int contextEnd, int flags, float[] advances, int advancesIndex,
3424                Paint p) {
3425            int count = end - start;
3426            int contextCount = contextEnd - contextStart;
3427            return p.getTextRunAdvances(mChars, start + mStart, count,
3428                    contextStart + mStart, contextCount, flags, advances,
3429                    advancesIndex);
3430        }
3431
3432        public float getTextRunAdvances(int start, int end, int contextStart,
3433                int contextEnd, int flags, float[] advances, int advancesIndex,
3434                Paint p, int reserved) {
3435            int count = end - start;
3436            int contextCount = contextEnd - contextStart;
3437            return p.getTextRunAdvances(mChars, start + mStart, count,
3438                    contextStart + mStart, contextCount, flags, advances,
3439                    advancesIndex, reserved);
3440        }
3441
3442        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3443                int offset, int cursorOpt, Paint p) {
3444            int contextCount = contextEnd - contextStart;
3445            return p.getTextRunCursor(mChars, contextStart + mStart,
3446                    contextCount, flags, offset + mStart, cursorOpt);
3447        }
3448    }
3449
3450    /**
3451     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3452     * except that the cursor position (if any) is retained in the new text.
3453     *
3454     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3455     */
3456    public final void setTextKeepState(CharSequence text, BufferType type) {
3457        int start = getSelectionStart();
3458        int end = getSelectionEnd();
3459        int len = text.length();
3460
3461        setText(text, type);
3462
3463        if (start >= 0 || end >= 0) {
3464            if (mText instanceof Spannable) {
3465                Selection.setSelection((Spannable) mText,
3466                                       Math.max(0, Math.min(start, len)),
3467                                       Math.max(0, Math.min(end, len)));
3468            }
3469        }
3470    }
3471
3472    @android.view.RemotableViewMethod
3473    public final void setText(int resid) {
3474        setText(getContext().getResources().getText(resid));
3475    }
3476
3477    public final void setText(int resid, BufferType type) {
3478        setText(getContext().getResources().getText(resid), type);
3479    }
3480
3481    /**
3482     * Sets the text to be displayed when the text of the TextView is empty.
3483     * Null means to use the normal empty text. The hint does not currently
3484     * participate in determining the size of the view.
3485     *
3486     * @attr ref android.R.styleable#TextView_hint
3487     */
3488    @android.view.RemotableViewMethod
3489    public final void setHint(CharSequence hint) {
3490        mHint = TextUtils.stringOrSpannedString(hint);
3491
3492        if (mLayout != null) {
3493            checkForRelayout();
3494        }
3495
3496        if (mText.length() == 0) {
3497            invalidate();
3498        }
3499    }
3500
3501    /**
3502     * Sets the text to be displayed when the text of the TextView is empty,
3503     * from a resource.
3504     *
3505     * @attr ref android.R.styleable#TextView_hint
3506     */
3507    @android.view.RemotableViewMethod
3508    public final void setHint(int resid) {
3509        setHint(getContext().getResources().getText(resid));
3510    }
3511
3512    /**
3513     * Returns the hint that is displayed when the text of the TextView
3514     * is empty.
3515     *
3516     * @attr ref android.R.styleable#TextView_hint
3517     */
3518    @ViewDebug.CapturedViewProperty
3519    public CharSequence getHint() {
3520        return mHint;
3521    }
3522
3523    private static boolean isMultilineInputType(int type) {
3524        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3525            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3526    }
3527
3528    /**
3529     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3530     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3531     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3532     * then a soft keyboard will not be displayed for this text view.
3533     *
3534     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3535     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3536     * type.
3537     *
3538     * @see #getInputType()
3539     * @see #setRawInputType(int)
3540     * @see android.text.InputType
3541     * @attr ref android.R.styleable#TextView_inputType
3542     */
3543    public void setInputType(int type) {
3544        final boolean wasPassword = isPasswordInputType(mInputType);
3545        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3546        setInputType(type, false);
3547        final boolean isPassword = isPasswordInputType(type);
3548        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3549        boolean forceUpdate = false;
3550        if (isPassword) {
3551            setTransformationMethod(PasswordTransformationMethod.getInstance());
3552            setTypefaceByIndex(MONOSPACE, 0);
3553        } else if (isVisiblePassword) {
3554            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3555                forceUpdate = true;
3556            }
3557            setTypefaceByIndex(MONOSPACE, 0);
3558        } else if (wasPassword || wasVisiblePassword) {
3559            // not in password mode, clean up typeface and transformation
3560            setTypefaceByIndex(-1, -1);
3561            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3562                forceUpdate = true;
3563            }
3564        }
3565
3566        boolean singleLine = !isMultilineInputType(type);
3567
3568        // We need to update the single line mode if it has changed or we
3569        // were previously in password mode.
3570        if (mSingleLine != singleLine || forceUpdate) {
3571            // Change single line mode, but only change the transformation if
3572            // we are not in password mode.
3573            applySingleLine(singleLine, !isPassword, true);
3574        }
3575
3576        if (!isSuggestionsEnabled()) {
3577            mText = removeSuggestionSpans(mText);
3578        }
3579
3580        InputMethodManager imm = InputMethodManager.peekInstance();
3581        if (imm != null) imm.restartInput(this);
3582    }
3583
3584    /**
3585     * It would be better to rely on the input type for everything. A password inputType should have
3586     * a password transformation. We should hence use isPasswordInputType instead of this method.
3587     *
3588     * We should:
3589     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3590     * would install the correct transformation).
3591     * - Refuse the installation of a non-password transformation in setTransformation if the input
3592     * type is password.
3593     *
3594     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3595     * is useful since it matches what the user can see (obfuscated text or not).
3596     *
3597     * @return true if the current transformation method is of the password type.
3598     */
3599    private boolean hasPasswordTransformationMethod() {
3600        return mTransformation instanceof PasswordTransformationMethod;
3601    }
3602
3603    private static boolean isPasswordInputType(int inputType) {
3604        final int variation =
3605                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3606        return variation
3607                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3608                || variation
3609                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3610                || variation
3611                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3612    }
3613
3614    private static boolean isVisiblePasswordInputType(int inputType) {
3615        final int variation =
3616                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3617        return variation
3618                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3619    }
3620
3621    /**
3622     * Directly change the content type integer of the text view, without
3623     * modifying any other state.
3624     * @see #setInputType(int)
3625     * @see android.text.InputType
3626     * @attr ref android.R.styleable#TextView_inputType
3627     */
3628    public void setRawInputType(int type) {
3629        mInputType = type;
3630    }
3631
3632    private void setInputType(int type, boolean direct) {
3633        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3634        KeyListener input;
3635        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3636            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3637            TextKeyListener.Capitalize cap;
3638            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3639                cap = TextKeyListener.Capitalize.CHARACTERS;
3640            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3641                cap = TextKeyListener.Capitalize.WORDS;
3642            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3643                cap = TextKeyListener.Capitalize.SENTENCES;
3644            } else {
3645                cap = TextKeyListener.Capitalize.NONE;
3646            }
3647            input = TextKeyListener.getInstance(autotext, cap);
3648        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3649            input = DigitsKeyListener.getInstance(
3650                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3651                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3652        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3653            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3654                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3655                    input = DateKeyListener.getInstance();
3656                    break;
3657                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3658                    input = TimeKeyListener.getInstance();
3659                    break;
3660                default:
3661                    input = DateTimeKeyListener.getInstance();
3662                    break;
3663            }
3664        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3665            input = DialerKeyListener.getInstance();
3666        } else {
3667            input = TextKeyListener.getInstance();
3668        }
3669        setRawInputType(type);
3670        if (direct) mInput = input;
3671        else {
3672            setKeyListenerOnly(input);
3673        }
3674    }
3675
3676    /**
3677     * Get the type of the content.
3678     *
3679     * @see #setInputType(int)
3680     * @see android.text.InputType
3681     */
3682    public int getInputType() {
3683        return mInputType;
3684    }
3685
3686    /**
3687     * Change the editor type integer associated with the text view, which
3688     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3689     * has focus.
3690     * @see #getImeOptions
3691     * @see android.view.inputmethod.EditorInfo
3692     * @attr ref android.R.styleable#TextView_imeOptions
3693     */
3694    public void setImeOptions(int imeOptions) {
3695        if (mInputContentType == null) {
3696            mInputContentType = new InputContentType();
3697        }
3698        mInputContentType.imeOptions = imeOptions;
3699    }
3700
3701    /**
3702     * Get the type of the IME editor.
3703     *
3704     * @see #setImeOptions(int)
3705     * @see android.view.inputmethod.EditorInfo
3706     */
3707    public int getImeOptions() {
3708        return mInputContentType != null
3709                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3710    }
3711
3712    /**
3713     * Change the custom IME action associated with the text view, which
3714     * will be reported to an IME with {@link EditorInfo#actionLabel}
3715     * and {@link EditorInfo#actionId} when it has focus.
3716     * @see #getImeActionLabel
3717     * @see #getImeActionId
3718     * @see android.view.inputmethod.EditorInfo
3719     * @attr ref android.R.styleable#TextView_imeActionLabel
3720     * @attr ref android.R.styleable#TextView_imeActionId
3721     */
3722    public void setImeActionLabel(CharSequence label, int actionId) {
3723        if (mInputContentType == null) {
3724            mInputContentType = new InputContentType();
3725        }
3726        mInputContentType.imeActionLabel = label;
3727        mInputContentType.imeActionId = actionId;
3728    }
3729
3730    /**
3731     * Get the IME action label previous set with {@link #setImeActionLabel}.
3732     *
3733     * @see #setImeActionLabel
3734     * @see android.view.inputmethod.EditorInfo
3735     */
3736    public CharSequence getImeActionLabel() {
3737        return mInputContentType != null
3738                ? mInputContentType.imeActionLabel : null;
3739    }
3740
3741    /**
3742     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3743     *
3744     * @see #setImeActionLabel
3745     * @see android.view.inputmethod.EditorInfo
3746     */
3747    public int getImeActionId() {
3748        return mInputContentType != null
3749                ? mInputContentType.imeActionId : 0;
3750    }
3751
3752    /**
3753     * Set a special listener to be called when an action is performed
3754     * on the text view.  This will be called when the enter key is pressed,
3755     * or when an action supplied to the IME is selected by the user.  Setting
3756     * this means that the normal hard key event will not insert a newline
3757     * into the text view, even if it is multi-line; holding down the ALT
3758     * modifier will, however, allow the user to insert a newline character.
3759     */
3760    public void setOnEditorActionListener(OnEditorActionListener l) {
3761        if (mInputContentType == null) {
3762            mInputContentType = new InputContentType();
3763        }
3764        mInputContentType.onEditorActionListener = l;
3765    }
3766
3767    /**
3768     * Called when an attached input method calls
3769     * {@link InputConnection#performEditorAction(int)
3770     * InputConnection.performEditorAction()}
3771     * for this text view.  The default implementation will call your action
3772     * listener supplied to {@link #setOnEditorActionListener}, or perform
3773     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3774     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3775     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3776     * EditorInfo.IME_ACTION_DONE}.
3777     *
3778     * <p>For backwards compatibility, if no IME options have been set and the
3779     * text view would not normally advance focus on enter, then
3780     * the NEXT and DONE actions received here will be turned into an enter
3781     * key down/up pair to go through the normal key handling.
3782     *
3783     * @param actionCode The code of the action being performed.
3784     *
3785     * @see #setOnEditorActionListener
3786     */
3787    public void onEditorAction(int actionCode) {
3788        final InputContentType ict = mInputContentType;
3789        if (ict != null) {
3790            if (ict.onEditorActionListener != null) {
3791                if (ict.onEditorActionListener.onEditorAction(this,
3792                        actionCode, null)) {
3793                    return;
3794                }
3795            }
3796
3797            // This is the handling for some default action.
3798            // Note that for backwards compatibility we don't do this
3799            // default handling if explicit ime options have not been given,
3800            // instead turning this into the normal enter key codes that an
3801            // app may be expecting.
3802            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3803                View v = focusSearch(FOCUS_FORWARD);
3804                if (v != null) {
3805                    if (!v.requestFocus(FOCUS_FORWARD)) {
3806                        throw new IllegalStateException("focus search returned a view " +
3807                                "that wasn't able to take focus!");
3808                    }
3809                }
3810                return;
3811
3812            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3813                View v = focusSearch(FOCUS_BACKWARD);
3814                if (v != null) {
3815                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3816                        throw new IllegalStateException("focus search returned a view " +
3817                                "that wasn't able to take focus!");
3818                    }
3819                }
3820                return;
3821
3822            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3823                InputMethodManager imm = InputMethodManager.peekInstance();
3824                if (imm != null && imm.isActive(this)) {
3825                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3826                }
3827                return;
3828            }
3829        }
3830
3831        Handler h = getHandler();
3832        if (h != null) {
3833            long eventTime = SystemClock.uptimeMillis();
3834            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3835                    new KeyEvent(eventTime, eventTime,
3836                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3837                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3838                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3839                    | KeyEvent.FLAG_EDITOR_ACTION)));
3840            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3841                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3842                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3843                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3844                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3845                    | KeyEvent.FLAG_EDITOR_ACTION)));
3846        }
3847    }
3848
3849    /**
3850     * Set the private content type of the text, which is the
3851     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3852     * field that will be filled in when creating an input connection.
3853     *
3854     * @see #getPrivateImeOptions()
3855     * @see EditorInfo#privateImeOptions
3856     * @attr ref android.R.styleable#TextView_privateImeOptions
3857     */
3858    public void setPrivateImeOptions(String type) {
3859        if (mInputContentType == null) mInputContentType = new InputContentType();
3860        mInputContentType.privateImeOptions = type;
3861    }
3862
3863    /**
3864     * Get the private type of the content.
3865     *
3866     * @see #setPrivateImeOptions(String)
3867     * @see EditorInfo#privateImeOptions
3868     */
3869    public String getPrivateImeOptions() {
3870        return mInputContentType != null
3871                ? mInputContentType.privateImeOptions : null;
3872    }
3873
3874    /**
3875     * Set the extra input data of the text, which is the
3876     * {@link EditorInfo#extras TextBoxAttribute.extras}
3877     * Bundle that will be filled in when creating an input connection.  The
3878     * given integer is the resource ID of an XML resource holding an
3879     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3880     *
3881     * @see #getInputExtras(boolean)
3882     * @see EditorInfo#extras
3883     * @attr ref android.R.styleable#TextView_editorExtras
3884     */
3885    public void setInputExtras(int xmlResId)
3886            throws XmlPullParserException, IOException {
3887        XmlResourceParser parser = getResources().getXml(xmlResId);
3888        if (mInputContentType == null) mInputContentType = new InputContentType();
3889        mInputContentType.extras = new Bundle();
3890        getResources().parseBundleExtras(parser, mInputContentType.extras);
3891    }
3892
3893    /**
3894     * Retrieve the input extras currently associated with the text view, which
3895     * can be viewed as well as modified.
3896     *
3897     * @param create If true, the extras will be created if they don't already
3898     * exist.  Otherwise, null will be returned if none have been created.
3899     * @see #setInputExtras(int)
3900     * @see EditorInfo#extras
3901     * @attr ref android.R.styleable#TextView_editorExtras
3902     */
3903    public Bundle getInputExtras(boolean create) {
3904        if (mInputContentType == null) {
3905            if (!create) return null;
3906            mInputContentType = new InputContentType();
3907        }
3908        if (mInputContentType.extras == null) {
3909            if (!create) return null;
3910            mInputContentType.extras = new Bundle();
3911        }
3912        return mInputContentType.extras;
3913    }
3914
3915    /**
3916     * Returns the error message that was set to be displayed with
3917     * {@link #setError}, or <code>null</code> if no error was set
3918     * or if it the error was cleared by the widget after user input.
3919     */
3920    public CharSequence getError() {
3921        return mError;
3922    }
3923
3924    /**
3925     * Sets the right-hand compound drawable of the TextView to the "error"
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.  If the
3929     * <code>error</code> is <code>null</code>, the error message and icon
3930     * will be cleared.
3931     */
3932    @android.view.RemotableViewMethod
3933    public void setError(CharSequence error) {
3934        if (error == null) {
3935            setError(null, null);
3936        } else {
3937            Drawable dr = getContext().getResources().
3938                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3939
3940            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3941            setError(error, dr);
3942        }
3943    }
3944
3945    /**
3946     * Sets the right-hand compound drawable of the TextView to the specified
3947     * icon and sets an error message that will be displayed in a popup when
3948     * the TextView has focus.  The icon and error message will be reset to
3949     * null when any key events cause changes to the TextView's text.  The
3950     * drawable must already have had {@link Drawable#setBounds} set on it.
3951     * If the <code>error</code> is <code>null</code>, the error message will
3952     * be cleared (and you should provide a <code>null</code> icon as well).
3953     */
3954    public void setError(CharSequence error, Drawable icon) {
3955        error = TextUtils.stringOrSpannedString(error);
3956
3957        mError = error;
3958        mErrorWasChanged = true;
3959        final Drawables dr = mDrawables;
3960        if (dr != null) {
3961            switch (getResolvedLayoutDirection()) {
3962                default:
3963                case LAYOUT_DIRECTION_LTR:
3964                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3965                            dr.mDrawableBottom);
3966                    break;
3967                case LAYOUT_DIRECTION_RTL:
3968                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3969                            dr.mDrawableBottom);
3970                    break;
3971            }
3972        } else {
3973            setCompoundDrawables(null, null, icon, null);
3974        }
3975
3976        if (error == null) {
3977            if (mPopup != null) {
3978                if (mPopup.isShowing()) {
3979                    mPopup.dismiss();
3980                }
3981
3982                mPopup = null;
3983            }
3984        } else {
3985            if (isFocused()) {
3986                showError();
3987            }
3988        }
3989    }
3990
3991    private void showError() {
3992        if (getWindowToken() == null) {
3993            mShowErrorAfterAttach = true;
3994            return;
3995        }
3996
3997        if (mPopup == null) {
3998            LayoutInflater inflater = LayoutInflater.from(getContext());
3999            final TextView err = (TextView) inflater.inflate(
4000                    com.android.internal.R.layout.textview_hint, null);
4001
4002            final float scale = getResources().getDisplayMetrics().density;
4003            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
4004            mPopup.setFocusable(false);
4005            // The user is entering text, so the input method is needed.  We
4006            // don't want the popup to be displayed on top of it.
4007            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
4008        }
4009
4010        TextView tv = (TextView) mPopup.getContentView();
4011        chooseSize(mPopup, mError, tv);
4012        tv.setText(mError);
4013
4014        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
4015        mPopup.fixDirection(mPopup.isAboveAnchor());
4016    }
4017
4018    private static class ErrorPopup extends PopupWindow {
4019        private boolean mAbove = false;
4020        private final TextView mView;
4021        private int mPopupInlineErrorBackgroundId = 0;
4022        private int mPopupInlineErrorAboveBackgroundId = 0;
4023
4024        ErrorPopup(TextView v, int width, int height) {
4025            super(v, width, height);
4026            mView = v;
4027            // Make sure the TextView has a background set as it will be used the first time it is
4028            // shown and positionned. Initialized with below background, which should have
4029            // dimensions identical to the above version for this to work (and is more likely).
4030            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4031                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4032            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4033        }
4034
4035        void fixDirection(boolean above) {
4036            mAbove = above;
4037
4038            if (above) {
4039                mPopupInlineErrorAboveBackgroundId =
4040                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4041                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4042            } else {
4043                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4044                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4045            }
4046
4047            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4048                mPopupInlineErrorBackgroundId);
4049        }
4050
4051        private int getResourceId(int currentId, int index) {
4052            if (currentId == 0) {
4053                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4054                        R.styleable.Theme);
4055                currentId = styledAttributes.getResourceId(index, 0);
4056                styledAttributes.recycle();
4057            }
4058            return currentId;
4059        }
4060
4061        @Override
4062        public void update(int x, int y, int w, int h, boolean force) {
4063            super.update(x, y, w, h, force);
4064
4065            boolean above = isAboveAnchor();
4066            if (above != mAbove) {
4067                fixDirection(above);
4068            }
4069        }
4070    }
4071
4072    /**
4073     * Returns the Y offset to make the pointy top of the error point
4074     * at the middle of the error icon.
4075     */
4076    private int getErrorX() {
4077        /*
4078         * The "25" is the distance between the point and the right edge
4079         * of the background
4080         */
4081        final float scale = getResources().getDisplayMetrics().density;
4082
4083        final Drawables dr = mDrawables;
4084        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4085                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4086    }
4087
4088    /**
4089     * Returns the Y offset to make the pointy top of the error point
4090     * at the bottom of the error icon.
4091     */
4092    private int getErrorY() {
4093        /*
4094         * Compound, not extended, because the icon is not clipped
4095         * if the text height is smaller.
4096         */
4097        final int compoundPaddingTop = getCompoundPaddingTop();
4098        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4099
4100        final Drawables dr = mDrawables;
4101        int icontop = compoundPaddingTop +
4102                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4103
4104        /*
4105         * The "2" is the distance between the point and the top edge
4106         * of the background.
4107         */
4108        final float scale = getResources().getDisplayMetrics().density;
4109        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4110                (int) (2 * scale + 0.5f);
4111    }
4112
4113    private void hideError() {
4114        if (mPopup != null) {
4115            if (mPopup.isShowing()) {
4116                mPopup.dismiss();
4117            }
4118        }
4119
4120        mShowErrorAfterAttach = false;
4121    }
4122
4123    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4124        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4125        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4126
4127        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4128                com.android.internal.R.dimen.textview_error_popup_default_width);
4129        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4130                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4131        float max = 0;
4132        for (int i = 0; i < l.getLineCount(); i++) {
4133            max = Math.max(max, l.getLineWidth(i));
4134        }
4135
4136        /*
4137         * Now set the popup size to be big enough for the text plus the border capped
4138         * to DEFAULT_MAX_POPUP_WIDTH
4139         */
4140        pop.setWidth(wid + (int) Math.ceil(max));
4141        pop.setHeight(ht + l.getHeight());
4142    }
4143
4144
4145    @Override
4146    protected boolean setFrame(int l, int t, int r, int b) {
4147        boolean result = super.setFrame(l, t, r, b);
4148
4149        if (mPopup != null) {
4150            TextView tv = (TextView) mPopup.getContentView();
4151            chooseSize(mPopup, mError, tv);
4152            mPopup.update(this, getErrorX(), getErrorY(),
4153                          mPopup.getWidth(), mPopup.getHeight());
4154        }
4155
4156        restartMarqueeIfNeeded();
4157
4158        return result;
4159    }
4160
4161    private void restartMarqueeIfNeeded() {
4162        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4163            mRestartMarquee = false;
4164            startMarquee();
4165        }
4166    }
4167
4168    /**
4169     * Sets the list of input filters that will be used if the buffer is
4170     * Editable.  Has no effect otherwise.
4171     *
4172     * @attr ref android.R.styleable#TextView_maxLength
4173     */
4174    public void setFilters(InputFilter[] filters) {
4175        if (filters == null) {
4176            throw new IllegalArgumentException();
4177        }
4178
4179        mFilters = filters;
4180
4181        if (mText instanceof Editable) {
4182            setFilters((Editable) mText, filters);
4183        }
4184    }
4185
4186    /**
4187     * Sets the list of input filters on the specified Editable,
4188     * and includes mInput in the list if it is an InputFilter.
4189     */
4190    private void setFilters(Editable e, InputFilter[] filters) {
4191        if (mInput instanceof InputFilter) {
4192            InputFilter[] nf = new InputFilter[filters.length + 1];
4193
4194            System.arraycopy(filters, 0, nf, 0, filters.length);
4195            nf[filters.length] = (InputFilter) mInput;
4196
4197            e.setFilters(nf);
4198        } else {
4199            e.setFilters(filters);
4200        }
4201    }
4202
4203    /**
4204     * Returns the current list of input filters.
4205     */
4206    public InputFilter[] getFilters() {
4207        return mFilters;
4208    }
4209
4210    /////////////////////////////////////////////////////////////////////////
4211
4212    private int getVerticalOffset(boolean forceNormal) {
4213        int voffset = 0;
4214        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4215
4216        Layout l = mLayout;
4217        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4218            l = mHintLayout;
4219        }
4220
4221        if (gravity != Gravity.TOP) {
4222            int boxht;
4223
4224            if (l == mHintLayout) {
4225                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4226                        getCompoundPaddingBottom();
4227            } else {
4228                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4229                        getExtendedPaddingBottom();
4230            }
4231            int textht = l.getHeight();
4232
4233            if (textht < boxht) {
4234                if (gravity == Gravity.BOTTOM)
4235                    voffset = boxht - textht;
4236                else // (gravity == Gravity.CENTER_VERTICAL)
4237                    voffset = (boxht - textht) >> 1;
4238            }
4239        }
4240        return voffset;
4241    }
4242
4243    private int getBottomVerticalOffset(boolean forceNormal) {
4244        int voffset = 0;
4245        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4246
4247        Layout l = mLayout;
4248        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4249            l = mHintLayout;
4250        }
4251
4252        if (gravity != Gravity.BOTTOM) {
4253            int boxht;
4254
4255            if (l == mHintLayout) {
4256                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4257                        getCompoundPaddingBottom();
4258            } else {
4259                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4260                        getExtendedPaddingBottom();
4261            }
4262            int textht = l.getHeight();
4263
4264            if (textht < boxht) {
4265                if (gravity == Gravity.TOP)
4266                    voffset = boxht - textht;
4267                else // (gravity == Gravity.CENTER_VERTICAL)
4268                    voffset = (boxht - textht) >> 1;
4269            }
4270        }
4271        return voffset;
4272    }
4273
4274    private void invalidateCursorPath() {
4275        if (mHighlightPathBogus) {
4276            invalidateCursor();
4277        } else {
4278            final int horizontalPadding = getCompoundPaddingLeft();
4279            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4280
4281            if (mCursorCount == 0) {
4282                synchronized (sTempRect) {
4283                    /*
4284                     * The reason for this concern about the thickness of the
4285                     * cursor and doing the floor/ceil on the coordinates is that
4286                     * some EditTexts (notably textfields in the Browser) have
4287                     * anti-aliased text where not all the characters are
4288                     * necessarily at integer-multiple locations.  This should
4289                     * make sure the entire cursor gets invalidated instead of
4290                     * sometimes missing half a pixel.
4291                     */
4292                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4293                    if (thick < 1.0f) {
4294                        thick = 1.0f;
4295                    }
4296
4297                    thick /= 2.0f;
4298
4299                    mHighlightPath.computeBounds(sTempRect, false);
4300
4301                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4302                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4303                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4304                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4305                }
4306            } else {
4307                for (int i = 0; i < mCursorCount; i++) {
4308                    Rect bounds = mCursorDrawable[i].getBounds();
4309                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4310                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4311                }
4312            }
4313        }
4314    }
4315
4316    private void invalidateCursor() {
4317        int where = getSelectionEnd();
4318
4319        invalidateCursor(where, where, where);
4320    }
4321
4322    private void invalidateCursor(int a, int b, int c) {
4323        if (a >= 0 || b >= 0 || c >= 0) {
4324            int start = Math.min(Math.min(a, b), c);
4325            int end = Math.max(Math.max(a, b), c);
4326            invalidateRegion(start, end, true /* Also invalidates blinking cursor */);
4327        }
4328    }
4329
4330    /**
4331     * Invalidates the region of text enclosed between the start and end text offsets.
4332     *
4333     * @hide
4334     */
4335    void invalidateRegion(int start, int end, boolean invalidateCursor) {
4336        if (mLayout == null) {
4337            invalidate();
4338        } else {
4339                int lineStart = mLayout.getLineForOffset(start);
4340                int top = mLayout.getLineTop(lineStart);
4341
4342                // This is ridiculous, but the descent from the line above
4343                // can hang down into the line we really want to redraw,
4344                // so we have to invalidate part of the line above to make
4345                // sure everything that needs to be redrawn really is.
4346                // (But not the whole line above, because that would cause
4347                // the same problem with the descenders on the line above it!)
4348                if (lineStart > 0) {
4349                    top -= mLayout.getLineDescent(lineStart - 1);
4350                }
4351
4352                int lineEnd;
4353
4354                if (start == end)
4355                    lineEnd = lineStart;
4356                else
4357                    lineEnd = mLayout.getLineForOffset(end);
4358
4359                int bottom = mLayout.getLineBottom(lineEnd);
4360
4361                if (invalidateCursor) {
4362                    for (int i = 0; i < mCursorCount; i++) {
4363                        Rect bounds = mCursorDrawable[i].getBounds();
4364                        top = Math.min(top, bounds.top);
4365                        bottom = Math.max(bottom, bounds.bottom);
4366                    }
4367                }
4368
4369                final int compoundPaddingLeft = getCompoundPaddingLeft();
4370                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4371
4372                int left, right;
4373                if (lineStart == lineEnd && !invalidateCursor) {
4374                    left = (int) mLayout.getPrimaryHorizontal(start);
4375                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4376                    left += compoundPaddingLeft;
4377                    right += compoundPaddingLeft;
4378                } else {
4379                    // Rectangle bounding box when the region spans several lines
4380                    left = compoundPaddingLeft;
4381                    right = getWidth() - getCompoundPaddingRight();
4382                }
4383
4384                invalidate(mScrollX + left, verticalPadding + top,
4385                        mScrollX + right, verticalPadding + bottom);
4386        }
4387    }
4388
4389    private void registerForPreDraw() {
4390        final ViewTreeObserver observer = getViewTreeObserver();
4391
4392        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4393            observer.addOnPreDrawListener(this);
4394            mPreDrawState = PREDRAW_PENDING;
4395        } else if (mPreDrawState == PREDRAW_DONE) {
4396            mPreDrawState = PREDRAW_PENDING;
4397        }
4398
4399        // else state is PREDRAW_PENDING, so keep waiting.
4400    }
4401
4402    /**
4403     * {@inheritDoc}
4404     */
4405    public boolean onPreDraw() {
4406        if (mPreDrawState != PREDRAW_PENDING) {
4407            return true;
4408        }
4409
4410        if (mLayout == null) {
4411            assumeLayout();
4412        }
4413
4414        boolean changed = false;
4415
4416        if (mMovement != null) {
4417            /* This code also provides auto-scrolling when a cursor is moved using a
4418             * CursorController (insertion point or selection limits).
4419             * For selection, ensure start or end is visible depending on controller's state.
4420             */
4421            int curs = getSelectionEnd();
4422            // Do not create the controller if it is not already created.
4423            if (mSelectionModifierCursorController != null &&
4424                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4425                curs = getSelectionStart();
4426            }
4427
4428            /*
4429             * TODO: This should really only keep the end in view if
4430             * it already was before the text changed.  I'm not sure
4431             * of a good way to tell from here if it was.
4432             */
4433            if (curs < 0 &&
4434                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4435                curs = mText.length();
4436            }
4437
4438            if (curs >= 0) {
4439                changed = bringPointIntoView(curs);
4440            }
4441        } else {
4442            changed = bringTextIntoView();
4443        }
4444
4445        // This has to be checked here since:
4446        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4447        //   a screen rotation) since layout is not yet initialized at that point.
4448        if (mCreatedWithASelection) {
4449            startSelectionActionMode();
4450            mCreatedWithASelection = false;
4451        }
4452
4453        // Phone specific code (there is no ExtractEditText on tablets).
4454        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4455        // not be set. Do the test here instead.
4456        if (this instanceof ExtractEditText && hasSelection()) {
4457            startSelectionActionMode();
4458        }
4459
4460        mPreDrawState = PREDRAW_DONE;
4461        return !changed;
4462    }
4463
4464    @Override
4465    protected void onAttachedToWindow() {
4466        super.onAttachedToWindow();
4467
4468        mTemporaryDetach = false;
4469
4470        if (mShowErrorAfterAttach) {
4471            showError();
4472            mShowErrorAfterAttach = false;
4473        }
4474
4475        final ViewTreeObserver observer = getViewTreeObserver();
4476        // No need to create the controller.
4477        // The get method will add the listener on controller creation.
4478        if (mInsertionPointCursorController != null) {
4479            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4480        }
4481        if (mSelectionModifierCursorController != null) {
4482            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4483        }
4484
4485        // Resolve drawables as the layout direction has been resolved
4486        resolveDrawables();
4487
4488        updateSpellCheckSpans(0, mText.length(), true /* create the spell checker if needed */);
4489    }
4490
4491    @Override
4492    protected void onDetachedFromWindow() {
4493        super.onDetachedFromWindow();
4494
4495        final ViewTreeObserver observer = getViewTreeObserver();
4496        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4497            observer.removeOnPreDrawListener(this);
4498            mPreDrawState = PREDRAW_NOT_REGISTERED;
4499        }
4500
4501        if (mError != null) {
4502            hideError();
4503        }
4504
4505        if (mBlink != null) {
4506            mBlink.removeCallbacks(mBlink);
4507        }
4508
4509        if (mInsertionPointCursorController != null) {
4510            mInsertionPointCursorController.onDetached();
4511        }
4512
4513        if (mSelectionModifierCursorController != null) {
4514            mSelectionModifierCursorController.onDetached();
4515        }
4516
4517        if (mShowSuggestionRunnable != null) {
4518            removeCallbacks(mShowSuggestionRunnable);
4519        }
4520
4521        hideControllers();
4522
4523        resetResolvedDrawables();
4524
4525        if (mTextDisplayList != null) {
4526            mTextDisplayList.invalidate();
4527        }
4528
4529        if (mSpellChecker != null) {
4530            mSpellChecker.closeSession();
4531            // Forces the creation of a new SpellChecker next time this window is created.
4532            // Will handle the cases where the settings has been changed in the meantime.
4533            mSpellChecker = null;
4534        }
4535    }
4536
4537    @Override
4538    protected boolean isPaddingOffsetRequired() {
4539        return mShadowRadius != 0 || mDrawables != null;
4540    }
4541
4542    @Override
4543    protected int getLeftPaddingOffset() {
4544        return getCompoundPaddingLeft() - mPaddingLeft +
4545                (int) Math.min(0, mShadowDx - mShadowRadius);
4546    }
4547
4548    @Override
4549    protected int getTopPaddingOffset() {
4550        return (int) Math.min(0, mShadowDy - mShadowRadius);
4551    }
4552
4553    @Override
4554    protected int getBottomPaddingOffset() {
4555        return (int) Math.max(0, mShadowDy + mShadowRadius);
4556    }
4557
4558    @Override
4559    protected int getRightPaddingOffset() {
4560        return -(getCompoundPaddingRight() - mPaddingRight) +
4561                (int) Math.max(0, mShadowDx + mShadowRadius);
4562    }
4563
4564    @Override
4565    protected boolean verifyDrawable(Drawable who) {
4566        final boolean verified = super.verifyDrawable(who);
4567        if (!verified && mDrawables != null) {
4568            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4569                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4570                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4571        }
4572        return verified;
4573    }
4574
4575    @Override
4576    public void jumpDrawablesToCurrentState() {
4577        super.jumpDrawablesToCurrentState();
4578        if (mDrawables != null) {
4579            if (mDrawables.mDrawableLeft != null) {
4580                mDrawables.mDrawableLeft.jumpToCurrentState();
4581            }
4582            if (mDrawables.mDrawableTop != null) {
4583                mDrawables.mDrawableTop.jumpToCurrentState();
4584            }
4585            if (mDrawables.mDrawableRight != null) {
4586                mDrawables.mDrawableRight.jumpToCurrentState();
4587            }
4588            if (mDrawables.mDrawableBottom != null) {
4589                mDrawables.mDrawableBottom.jumpToCurrentState();
4590            }
4591            if (mDrawables.mDrawableStart != null) {
4592                mDrawables.mDrawableStart.jumpToCurrentState();
4593            }
4594            if (mDrawables.mDrawableEnd != null) {
4595                mDrawables.mDrawableEnd.jumpToCurrentState();
4596            }
4597        }
4598    }
4599
4600    @Override
4601    public void invalidateDrawable(Drawable drawable) {
4602        if (verifyDrawable(drawable)) {
4603            final Rect dirty = drawable.getBounds();
4604            int scrollX = mScrollX;
4605            int scrollY = mScrollY;
4606
4607            // IMPORTANT: The coordinates below are based on the coordinates computed
4608            // for each compound drawable in onDraw(). Make sure to update each section
4609            // accordingly.
4610            final TextView.Drawables drawables = mDrawables;
4611            if (drawables != null) {
4612                if (drawable == drawables.mDrawableLeft) {
4613                    final int compoundPaddingTop = getCompoundPaddingTop();
4614                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4615                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4616
4617                    scrollX += mPaddingLeft;
4618                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4619                } else if (drawable == drawables.mDrawableRight) {
4620                    final int compoundPaddingTop = getCompoundPaddingTop();
4621                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4622                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4623
4624                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4625                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4626                } else if (drawable == drawables.mDrawableTop) {
4627                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4628                    final int compoundPaddingRight = getCompoundPaddingRight();
4629                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4630
4631                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4632                    scrollY += mPaddingTop;
4633                } else if (drawable == drawables.mDrawableBottom) {
4634                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4635                    final int compoundPaddingRight = getCompoundPaddingRight();
4636                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4637
4638                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4639                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4640                }
4641            }
4642
4643            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4644                    dirty.right + scrollX, dirty.bottom + scrollY);
4645        }
4646    }
4647
4648    /**
4649     * @hide
4650     */
4651    @Override
4652    public int getResolvedLayoutDirection(Drawable who) {
4653        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4654        if (mDrawables != null) {
4655            final Drawables drawables = mDrawables;
4656            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4657                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4658                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4659                return getResolvedLayoutDirection();
4660            }
4661        }
4662        return super.getResolvedLayoutDirection(who);
4663    }
4664
4665    @Override
4666    protected boolean onSetAlpha(int alpha) {
4667        // Alpha is supported if and only if the drawing can be done in one pass.
4668        // TODO text with spans with a background color currently do not respect this alpha.
4669        if (getBackground() == null) {
4670            mCurrentAlpha = alpha;
4671            final Drawables dr = mDrawables;
4672            if (dr != null) {
4673                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4674                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4675                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4676                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4677                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4678                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4679            }
4680            return true;
4681        }
4682
4683        mCurrentAlpha = 255;
4684        return false;
4685    }
4686
4687    /**
4688     * When a TextView is used to display a useful piece of information to the user (such as a
4689     * contact's address), it should be made selectable, so that the user can select and copy this
4690     * content.
4691     *
4692     * Use {@link #setTextIsSelectable(boolean)} or the
4693     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4694     * selectable (text is not selectable by default).
4695     *
4696     * Note that this method simply returns the state of this flag. Although this flag has to be set
4697     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4698     * always be selected, independently of the value of this flag.
4699     *
4700     * @return True if the text displayed in this TextView can be selected by the user.
4701     *
4702     * @attr ref android.R.styleable#TextView_textIsSelectable
4703     */
4704    public boolean isTextSelectable() {
4705        return mTextIsSelectable;
4706    }
4707
4708    /**
4709     * Sets whether or not (default) the content of this view is selectable by the user.
4710     *
4711     * Note that this methods affect the {@link #setFocusable(boolean)},
4712     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4713     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4714     * customized.
4715     *
4716     * See {@link #isTextSelectable} for details.
4717     *
4718     * @param selectable Whether or not the content of this TextView should be selectable.
4719     */
4720    public void setTextIsSelectable(boolean selectable) {
4721        if (mTextIsSelectable == selectable) return;
4722
4723        mTextIsSelectable = selectable;
4724
4725        setFocusableInTouchMode(selectable);
4726        setFocusable(selectable);
4727        setClickable(selectable);
4728        setLongClickable(selectable);
4729
4730        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4731
4732        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4733        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4734
4735        // Called by setText above, but safer in case of future code changes
4736        prepareCursorControllers();
4737    }
4738
4739    @Override
4740    protected int[] onCreateDrawableState(int extraSpace) {
4741        final int[] drawableState;
4742
4743        if (mSingleLine) {
4744            drawableState = super.onCreateDrawableState(extraSpace);
4745        } else {
4746            drawableState = super.onCreateDrawableState(extraSpace + 1);
4747            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4748        }
4749
4750        if (mTextIsSelectable) {
4751            // Disable pressed state, which was introduced when TextView was made clickable.
4752            // Prevents text color change.
4753            // setClickable(false) would have a similar effect, but it also disables focus changes
4754            // and long press actions, which are both needed by text selection.
4755            final int length = drawableState.length;
4756            for (int i = 0; i < length; i++) {
4757                if (drawableState[i] == R.attr.state_pressed) {
4758                    final int[] nonPressedState = new int[length - 1];
4759                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4760                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4761                    return nonPressedState;
4762                }
4763            }
4764        }
4765
4766        return drawableState;
4767    }
4768
4769    @Override
4770    protected void onDraw(Canvas canvas) {
4771        if (mPreDrawState == PREDRAW_DONE) {
4772            final ViewTreeObserver observer = getViewTreeObserver();
4773            observer.removeOnPreDrawListener(this);
4774            mPreDrawState = PREDRAW_NOT_REGISTERED;
4775        }
4776
4777        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4778
4779        restartMarqueeIfNeeded();
4780
4781        // Draw the background for this view
4782        super.onDraw(canvas);
4783
4784        final int compoundPaddingLeft = getCompoundPaddingLeft();
4785        final int compoundPaddingTop = getCompoundPaddingTop();
4786        final int compoundPaddingRight = getCompoundPaddingRight();
4787        final int compoundPaddingBottom = getCompoundPaddingBottom();
4788        final int scrollX = mScrollX;
4789        final int scrollY = mScrollY;
4790        final int right = mRight;
4791        final int left = mLeft;
4792        final int bottom = mBottom;
4793        final int top = mTop;
4794
4795        final Drawables dr = mDrawables;
4796        if (dr != null) {
4797            /*
4798             * Compound, not extended, because the icon is not clipped
4799             * if the text height is smaller.
4800             */
4801
4802            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4803            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4804
4805            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4806            // Make sure to update invalidateDrawable() when changing this code.
4807            if (dr.mDrawableLeft != null) {
4808                canvas.save();
4809                canvas.translate(scrollX + mPaddingLeft,
4810                                 scrollY + compoundPaddingTop +
4811                                 (vspace - dr.mDrawableHeightLeft) / 2);
4812                dr.mDrawableLeft.draw(canvas);
4813                canvas.restore();
4814            }
4815
4816            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4817            // Make sure to update invalidateDrawable() when changing this code.
4818            if (dr.mDrawableRight != null) {
4819                canvas.save();
4820                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4821                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4822                dr.mDrawableRight.draw(canvas);
4823                canvas.restore();
4824            }
4825
4826            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4827            // Make sure to update invalidateDrawable() when changing this code.
4828            if (dr.mDrawableTop != null) {
4829                canvas.save();
4830                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4831                        scrollY + mPaddingTop);
4832                dr.mDrawableTop.draw(canvas);
4833                canvas.restore();
4834            }
4835
4836            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4837            // Make sure to update invalidateDrawable() when changing this code.
4838            if (dr.mDrawableBottom != null) {
4839                canvas.save();
4840                canvas.translate(scrollX + compoundPaddingLeft +
4841                        (hspace - dr.mDrawableWidthBottom) / 2,
4842                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4843                dr.mDrawableBottom.draw(canvas);
4844                canvas.restore();
4845            }
4846        }
4847
4848        int color = mCurTextColor;
4849
4850        if (mLayout == null) {
4851            assumeLayout();
4852        }
4853
4854        Layout layout = mLayout;
4855        int cursorcolor = color;
4856
4857        if (mHint != null && mText.length() == 0) {
4858            if (mHintTextColor != null) {
4859                color = mCurHintTextColor;
4860            }
4861
4862            layout = mHintLayout;
4863        }
4864
4865        mTextPaint.setColor(color);
4866        if (mCurrentAlpha != 255) {
4867            // If set, the alpha will override the color's alpha. Multiply the alphas.
4868            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4869        }
4870        mTextPaint.drawableState = getDrawableState();
4871
4872        canvas.save();
4873        /*  Would be faster if we didn't have to do this. Can we chop the
4874            (displayable) text so that we don't need to do this ever?
4875        */
4876
4877        int extendedPaddingTop = getExtendedPaddingTop();
4878        int extendedPaddingBottom = getExtendedPaddingBottom();
4879
4880        float clipLeft = compoundPaddingLeft + scrollX;
4881        float clipTop = extendedPaddingTop + scrollY;
4882        float clipRight = right - left - compoundPaddingRight + scrollX;
4883        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4884
4885        if (mShadowRadius != 0) {
4886            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4887            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4888
4889            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4890            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4891        }
4892
4893        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4894
4895        int voffsetText = 0;
4896        int voffsetCursor = 0;
4897
4898        // translate in by our padding
4899        {
4900            /* shortcircuit calling getVerticaOffset() */
4901            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4902                voffsetText = getVerticalOffset(false);
4903                voffsetCursor = getVerticalOffset(true);
4904            }
4905            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4906        }
4907
4908        final int layoutDirection = getResolvedLayoutDirection();
4909        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4910        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4911                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4912            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4913                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4914                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4915                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4916            }
4917
4918            if (mMarquee != null && mMarquee.isRunning()) {
4919                canvas.translate(-mMarquee.mScroll, 0.0f);
4920            }
4921        }
4922
4923        Path highlight = null;
4924        int selStart = -1, selEnd = -1;
4925        boolean drawCursor = false;
4926
4927        //  If there is no movement method, then there can be no selection.
4928        //  Check that first and attempt to skip everything having to do with
4929        //  the cursor.
4930        //  XXX This is not strictly true -- a program could set the
4931        //  selection manually if it really wanted to.
4932        if (mMovement != null && (isFocused() || isPressed())) {
4933            selStart = getSelectionStart();
4934            selEnd = getSelectionEnd();
4935
4936            if (selStart >= 0) {
4937                if (mHighlightPath == null) mHighlightPath = new Path();
4938
4939                if (selStart == selEnd) {
4940                    if (isCursorVisible() &&
4941                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4942                        if (mHighlightPathBogus) {
4943                            mHighlightPath.reset();
4944                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4945                            updateCursorsPositions();
4946                            mHighlightPathBogus = false;
4947                        }
4948
4949                        // XXX should pass to skin instead of drawing directly
4950                        mHighlightPaint.setColor(cursorcolor);
4951                        if (mCurrentAlpha != 255) {
4952                            mHighlightPaint.setAlpha(
4953                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4954                        }
4955                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4956                        highlight = mHighlightPath;
4957                        drawCursor = mCursorCount > 0;
4958                    }
4959                } else if (textCanBeSelected()) {
4960                    if (mHighlightPathBogus) {
4961                        mHighlightPath.reset();
4962                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4963                        mHighlightPathBogus = false;
4964                    }
4965
4966                    // XXX should pass to skin instead of drawing directly
4967                    mHighlightPaint.setColor(mHighlightColor);
4968                    if (mCurrentAlpha != 255) {
4969                        mHighlightPaint.setAlpha(
4970                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4971                    }
4972                    mHighlightPaint.setStyle(Paint.Style.FILL);
4973
4974                    highlight = mHighlightPath;
4975                }
4976            }
4977        }
4978
4979        final InputMethodState ims = mInputMethodState;
4980        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4981        if (ims != null && ims.mBatchEditNesting == 0) {
4982            InputMethodManager imm = InputMethodManager.peekInstance();
4983            if (imm != null) {
4984                if (imm.isActive(this)) {
4985                    boolean reported = false;
4986                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4987                        // We are in extract mode and the content has changed
4988                        // in some way... just report complete new text to the
4989                        // input method.
4990                        reported = reportExtractedText();
4991                    }
4992                    if (!reported && highlight != null) {
4993                        int candStart = -1;
4994                        int candEnd = -1;
4995                        if (mText instanceof Spannable) {
4996                            Spannable sp = (Spannable)mText;
4997                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4998                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4999                        }
5000                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
5001                    }
5002                }
5003
5004                if (imm.isWatchingCursor(this) && highlight != null) {
5005                    highlight.computeBounds(ims.mTmpRectF, true);
5006                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
5007
5008                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
5009                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
5010
5011                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
5012
5013                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
5014                            (int)(ims.mTmpRectF.top + 0.5),
5015                            (int)(ims.mTmpRectF.right + 0.5),
5016                            (int)(ims.mTmpRectF.bottom + 0.5));
5017
5018                    imm.updateCursor(this,
5019                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
5020                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
5021                }
5022            }
5023        }
5024
5025        if (mCorrectionHighlighter != null) {
5026            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5027        }
5028
5029        if (drawCursor) {
5030            drawCursor(canvas, cursorOffsetVertical);
5031            // Rely on the drawable entirely, do not draw the cursor line.
5032            // Has to be done after the IMM related code above which relies on the highlight.
5033            highlight = null;
5034        }
5035
5036        if (canHaveDisplayList() && canvas.isHardwareAccelerated()) {
5037            final int width = mRight - mLeft;
5038            final int height = mBottom - mTop;
5039
5040            if (mTextDisplayList == null || !mTextDisplayList.isValid() ||
5041                    !mTextDisplayListIsValid) {
5042                if (mTextDisplayList == null) {
5043                    mTextDisplayList = getHardwareRenderer().createDisplayList();
5044                }
5045
5046                final HardwareCanvas hardwareCanvas = mTextDisplayList.start();
5047                try {
5048                    hardwareCanvas.setViewport(width, height);
5049                    // The dirty rect should always be null for a display list
5050                    hardwareCanvas.onPreDraw(null);
5051                    layout.draw(hardwareCanvas, highlight, mHighlightPaint, cursorOffsetVertical);
5052                } finally {
5053                    hardwareCanvas.onPostDraw();
5054                    mTextDisplayList.end();
5055                    mTextDisplayListIsValid = true;
5056                }
5057            }
5058            ((HardwareCanvas) canvas).drawDisplayList(mTextDisplayList,
5059                    mScrollX + width, mScrollY + height, null);
5060        } else {
5061            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5062        }
5063
5064        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5065            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5066            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5067        }
5068
5069        canvas.restore();
5070    }
5071
5072    private void updateCursorsPositions() {
5073        if (mCursorDrawableRes == 0) {
5074            mCursorCount = 0;
5075            return;
5076        }
5077
5078        final int offset = getSelectionStart();
5079        final int line = mLayout.getLineForOffset(offset);
5080        final int top = mLayout.getLineTop(line);
5081        final int bottom = mLayout.getLineTop(line + 1);
5082
5083        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5084
5085        int middle = bottom;
5086        if (mCursorCount == 2) {
5087            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5088            middle = (top + bottom) >> 1;
5089        }
5090
5091        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5092
5093        if (mCursorCount == 2) {
5094            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5095        }
5096    }
5097
5098    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5099        if (mCursorDrawable[cursorIndex] == null)
5100            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5101
5102        if (mTempRect == null) mTempRect = new Rect();
5103
5104        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5105        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5106        horizontal = Math.max(0.5f, horizontal - 0.5f);
5107        final int left = (int) (horizontal) - mTempRect.left;
5108        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5109                bottom + mTempRect.bottom);
5110    }
5111
5112    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5113        final boolean translate = cursorOffsetVertical != 0;
5114        if (translate) canvas.translate(0, cursorOffsetVertical);
5115        for (int i = 0; i < mCursorCount; i++) {
5116            mCursorDrawable[i].draw(canvas);
5117        }
5118        if (translate) canvas.translate(0, -cursorOffsetVertical);
5119    }
5120
5121    @Override
5122    public void getFocusedRect(Rect r) {
5123        if (mLayout == null) {
5124            super.getFocusedRect(r);
5125            return;
5126        }
5127
5128        int selEnd = getSelectionEnd();
5129        if (selEnd < 0) {
5130            super.getFocusedRect(r);
5131            return;
5132        }
5133
5134        int selStart = getSelectionStart();
5135        if (selStart < 0 || selStart >= selEnd) {
5136            int line = mLayout.getLineForOffset(selEnd);
5137            r.top = mLayout.getLineTop(line);
5138            r.bottom = mLayout.getLineBottom(line);
5139            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5140            r.right = r.left + 4;
5141        } else {
5142            int lineStart = mLayout.getLineForOffset(selStart);
5143            int lineEnd = mLayout.getLineForOffset(selEnd);
5144            r.top = mLayout.getLineTop(lineStart);
5145            r.bottom = mLayout.getLineBottom(lineEnd);
5146            if (lineStart == lineEnd) {
5147                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5148                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5149            } else {
5150                // Selection extends across multiple lines -- the focused
5151                // rect covers the entire width.
5152                if (mHighlightPath == null) mHighlightPath = new Path();
5153                if (mHighlightPathBogus) {
5154                    mHighlightPath.reset();
5155                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5156                    mHighlightPathBogus = false;
5157                }
5158                synchronized (sTempRect) {
5159                    mHighlightPath.computeBounds(sTempRect, true);
5160                    r.left = (int)sTempRect.left-1;
5161                    r.right = (int)sTempRect.right+1;
5162                }
5163            }
5164        }
5165
5166        // Adjust for padding and gravity.
5167        int paddingLeft = getCompoundPaddingLeft();
5168        int paddingTop = getExtendedPaddingTop();
5169        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5170            paddingTop += getVerticalOffset(false);
5171        }
5172        r.offset(paddingLeft, paddingTop);
5173    }
5174
5175    /**
5176     * Return the number of lines of text, or 0 if the internal Layout has not
5177     * been built.
5178     */
5179    public int getLineCount() {
5180        return mLayout != null ? mLayout.getLineCount() : 0;
5181    }
5182
5183    /**
5184     * Return the baseline for the specified line (0...getLineCount() - 1)
5185     * If bounds is not null, return the top, left, right, bottom extents
5186     * of the specified line in it. If the internal Layout has not been built,
5187     * return 0 and set bounds to (0, 0, 0, 0)
5188     * @param line which line to examine (0..getLineCount() - 1)
5189     * @param bounds Optional. If not null, it returns the extent of the line
5190     * @return the Y-coordinate of the baseline
5191     */
5192    public int getLineBounds(int line, Rect bounds) {
5193        if (mLayout == null) {
5194            if (bounds != null) {
5195                bounds.set(0, 0, 0, 0);
5196            }
5197            return 0;
5198        }
5199        else {
5200            int baseline = mLayout.getLineBounds(line, bounds);
5201
5202            int voffset = getExtendedPaddingTop();
5203            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5204                voffset += getVerticalOffset(true);
5205            }
5206            if (bounds != null) {
5207                bounds.offset(getCompoundPaddingLeft(), voffset);
5208            }
5209            return baseline + voffset;
5210        }
5211    }
5212
5213    @Override
5214    public int getBaseline() {
5215        if (mLayout == null) {
5216            return super.getBaseline();
5217        }
5218
5219        int voffset = 0;
5220        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5221            voffset = getVerticalOffset(true);
5222        }
5223
5224        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5225    }
5226
5227    /**
5228     * @hide
5229     * @param offsetRequired
5230     */
5231    @Override
5232    protected int getFadeTop(boolean offsetRequired) {
5233        if (mLayout == null) return 0;
5234
5235        int voffset = 0;
5236        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5237            voffset = getVerticalOffset(true);
5238        }
5239
5240        if (offsetRequired) voffset += getTopPaddingOffset();
5241
5242        return getExtendedPaddingTop() + voffset;
5243    }
5244
5245    /**
5246     * @hide
5247     * @param offsetRequired
5248     */
5249    @Override
5250    protected int getFadeHeight(boolean offsetRequired) {
5251        return mLayout != null ? mLayout.getHeight() : 0;
5252    }
5253
5254    @Override
5255    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5256        if (keyCode == KeyEvent.KEYCODE_BACK) {
5257            boolean isInSelectionMode = mSelectionActionMode != null;
5258
5259            if (isInSelectionMode) {
5260                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5261                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5262                    if (state != null) {
5263                        state.startTracking(event, this);
5264                    }
5265                    return true;
5266                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5267                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5268                    if (state != null) {
5269                        state.handleUpEvent(event);
5270                    }
5271                    if (event.isTracking() && !event.isCanceled()) {
5272                        stopSelectionActionMode();
5273                        return true;
5274                    }
5275                }
5276            }
5277        }
5278        return super.onKeyPreIme(keyCode, event);
5279    }
5280
5281    @Override
5282    public boolean onKeyDown(int keyCode, KeyEvent event) {
5283        int which = doKeyDown(keyCode, event, null);
5284        if (which == 0) {
5285            // Go through default dispatching.
5286            return super.onKeyDown(keyCode, event);
5287        }
5288
5289        return true;
5290    }
5291
5292    @Override
5293    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5294        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5295
5296        int which = doKeyDown(keyCode, down, event);
5297        if (which == 0) {
5298            // Go through default dispatching.
5299            return super.onKeyMultiple(keyCode, repeatCount, event);
5300        }
5301        if (which == -1) {
5302            // Consumed the whole thing.
5303            return true;
5304        }
5305
5306        repeatCount--;
5307
5308        // We are going to dispatch the remaining events to either the input
5309        // or movement method.  To do this, we will just send a repeated stream
5310        // of down and up events until we have done the complete repeatCount.
5311        // It would be nice if those interfaces had an onKeyMultiple() method,
5312        // but adding that is a more complicated change.
5313        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5314        if (which == 1) {
5315            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5316            while (--repeatCount > 0) {
5317                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5318                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5319            }
5320            hideErrorIfUnchanged();
5321
5322        } else if (which == 2) {
5323            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5324            while (--repeatCount > 0) {
5325                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5326                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5327            }
5328        }
5329
5330        return true;
5331    }
5332
5333    /**
5334     * Returns true if pressing ENTER in this field advances focus instead
5335     * of inserting the character.  This is true mostly in single-line fields,
5336     * but also in mail addresses and subjects which will display on multiple
5337     * lines but where it doesn't make sense to insert newlines.
5338     */
5339    private boolean shouldAdvanceFocusOnEnter() {
5340        if (mInput == null) {
5341            return false;
5342        }
5343
5344        if (mSingleLine) {
5345            return true;
5346        }
5347
5348        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5349            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5350            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5351                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5352                return true;
5353            }
5354        }
5355
5356        return false;
5357    }
5358
5359    /**
5360     * Returns true if pressing TAB in this field advances focus instead
5361     * of inserting the character.  Insert tabs only in multi-line editors.
5362     */
5363    private boolean shouldAdvanceFocusOnTab() {
5364        if (mInput != null && !mSingleLine) {
5365            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5366                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5367                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5368                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5369                    return false;
5370                }
5371            }
5372        }
5373        return true;
5374    }
5375
5376    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5377        if (!isEnabled()) {
5378            return 0;
5379        }
5380
5381        switch (keyCode) {
5382            case KeyEvent.KEYCODE_ENTER:
5383                if (event.hasNoModifiers()) {
5384                    // When mInputContentType is set, we know that we are
5385                    // running in a "modern" cupcake environment, so don't need
5386                    // to worry about the application trying to capture
5387                    // enter key events.
5388                    if (mInputContentType != null) {
5389                        // If there is an action listener, given them a
5390                        // chance to consume the event.
5391                        if (mInputContentType.onEditorActionListener != null &&
5392                                mInputContentType.onEditorActionListener.onEditorAction(
5393                                this, EditorInfo.IME_NULL, event)) {
5394                            mInputContentType.enterDown = true;
5395                            // We are consuming the enter key for them.
5396                            return -1;
5397                        }
5398                    }
5399
5400                    // If our editor should move focus when enter is pressed, or
5401                    // this is a generated event from an IME action button, then
5402                    // don't let it be inserted into the text.
5403                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5404                            || shouldAdvanceFocusOnEnter()) {
5405                        if (hasOnClickListeners()) {
5406                            return 0;
5407                        }
5408                        return -1;
5409                    }
5410                }
5411                break;
5412
5413            case KeyEvent.KEYCODE_DPAD_CENTER:
5414                if (event.hasNoModifiers()) {
5415                    if (shouldAdvanceFocusOnEnter()) {
5416                        return 0;
5417                    }
5418                }
5419                break;
5420
5421            case KeyEvent.KEYCODE_TAB:
5422                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5423                    if (shouldAdvanceFocusOnTab()) {
5424                        return 0;
5425                    }
5426                }
5427                break;
5428
5429                // Has to be done on key down (and not on key up) to correctly be intercepted.
5430            case KeyEvent.KEYCODE_BACK:
5431                if (mSelectionActionMode != null) {
5432                    stopSelectionActionMode();
5433                    return -1;
5434                }
5435                break;
5436        }
5437
5438        if (mInput != null) {
5439            resetErrorChangedFlag();
5440
5441            boolean doDown = true;
5442            if (otherEvent != null) {
5443                try {
5444                    beginBatchEdit();
5445                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5446                    hideErrorIfUnchanged();
5447                    doDown = false;
5448                    if (handled) {
5449                        return -1;
5450                    }
5451                } catch (AbstractMethodError e) {
5452                    // onKeyOther was added after 1.0, so if it isn't
5453                    // implemented we need to try to dispatch as a regular down.
5454                } finally {
5455                    endBatchEdit();
5456                }
5457            }
5458
5459            if (doDown) {
5460                beginBatchEdit();
5461                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5462                endBatchEdit();
5463                hideErrorIfUnchanged();
5464                if (handled) return 1;
5465            }
5466        }
5467
5468        // bug 650865: sometimes we get a key event before a layout.
5469        // don't try to move around if we don't know the layout.
5470
5471        if (mMovement != null && mLayout != null) {
5472            boolean doDown = true;
5473            if (otherEvent != null) {
5474                try {
5475                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5476                            otherEvent);
5477                    doDown = false;
5478                    if (handled) {
5479                        return -1;
5480                    }
5481                } catch (AbstractMethodError e) {
5482                    // onKeyOther was added after 1.0, so if it isn't
5483                    // implemented we need to try to dispatch as a regular down.
5484                }
5485            }
5486            if (doDown) {
5487                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5488                    return 2;
5489            }
5490        }
5491
5492        return 0;
5493    }
5494
5495    /**
5496     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5497     * can be recorded.
5498     * @hide
5499     */
5500    public void resetErrorChangedFlag() {
5501        /*
5502         * Keep track of what the error was before doing the input
5503         * so that if an input filter changed the error, we leave
5504         * that error showing.  Otherwise, we take down whatever
5505         * error was showing when the user types something.
5506         */
5507        mErrorWasChanged = false;
5508    }
5509
5510    /**
5511     * @hide
5512     */
5513    public void hideErrorIfUnchanged() {
5514        if (mError != null && !mErrorWasChanged) {
5515            setError(null, null);
5516        }
5517    }
5518
5519    @Override
5520    public boolean onKeyUp(int keyCode, KeyEvent event) {
5521        if (!isEnabled()) {
5522            return super.onKeyUp(keyCode, event);
5523        }
5524
5525        switch (keyCode) {
5526            case KeyEvent.KEYCODE_DPAD_CENTER:
5527                if (event.hasNoModifiers()) {
5528                    /*
5529                     * If there is a click listener, just call through to
5530                     * super, which will invoke it.
5531                     *
5532                     * If there isn't a click listener, try to show the soft
5533                     * input method.  (It will also
5534                     * call performClick(), but that won't do anything in
5535                     * this case.)
5536                     */
5537                    if (!hasOnClickListeners()) {
5538                        if (mMovement != null && mText instanceof Editable
5539                                && mLayout != null && onCheckIsTextEditor()) {
5540                            InputMethodManager imm = InputMethodManager.peekInstance();
5541                            viewClicked(imm);
5542                            if (imm != null && mSoftInputShownOnFocus) {
5543                                imm.showSoftInput(this, 0);
5544                            }
5545                        }
5546                    }
5547                }
5548                return super.onKeyUp(keyCode, event);
5549
5550            case KeyEvent.KEYCODE_ENTER:
5551                if (event.hasNoModifiers()) {
5552                    if (mInputContentType != null
5553                            && mInputContentType.onEditorActionListener != null
5554                            && mInputContentType.enterDown) {
5555                        mInputContentType.enterDown = false;
5556                        if (mInputContentType.onEditorActionListener.onEditorAction(
5557                                this, EditorInfo.IME_NULL, event)) {
5558                            return true;
5559                        }
5560                    }
5561
5562                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5563                            || shouldAdvanceFocusOnEnter()) {
5564                        /*
5565                         * If there is a click listener, just call through to
5566                         * super, which will invoke it.
5567                         *
5568                         * If there isn't a click listener, try to advance focus,
5569                         * but still call through to super, which will reset the
5570                         * pressed state and longpress state.  (It will also
5571                         * call performClick(), but that won't do anything in
5572                         * this case.)
5573                         */
5574                        if (!hasOnClickListeners()) {
5575                            View v = focusSearch(FOCUS_DOWN);
5576
5577                            if (v != null) {
5578                                if (!v.requestFocus(FOCUS_DOWN)) {
5579                                    throw new IllegalStateException(
5580                                            "focus search returned a view " +
5581                                            "that wasn't able to take focus!");
5582                                }
5583
5584                                /*
5585                                 * Return true because we handled the key; super
5586                                 * will return false because there was no click
5587                                 * listener.
5588                                 */
5589                                super.onKeyUp(keyCode, event);
5590                                return true;
5591                            } else if ((event.getFlags()
5592                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5593                                // No target for next focus, but make sure the IME
5594                                // if this came from it.
5595                                InputMethodManager imm = InputMethodManager.peekInstance();
5596                                if (imm != null && imm.isActive(this)) {
5597                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5598                                }
5599                            }
5600                        }
5601                    }
5602                    return super.onKeyUp(keyCode, event);
5603                }
5604                break;
5605        }
5606
5607        if (mInput != null)
5608            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5609                return true;
5610
5611        if (mMovement != null && mLayout != null)
5612            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5613                return true;
5614
5615        return super.onKeyUp(keyCode, event);
5616    }
5617
5618    @Override
5619    public boolean onCheckIsTextEditor() {
5620        return mInputType != EditorInfo.TYPE_NULL;
5621    }
5622
5623    @Override
5624    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5625        if (onCheckIsTextEditor() && isEnabled()) {
5626            if (mInputMethodState == null) {
5627                mInputMethodState = new InputMethodState();
5628            }
5629            outAttrs.inputType = mInputType;
5630            if (mInputContentType != null) {
5631                outAttrs.imeOptions = mInputContentType.imeOptions;
5632                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5633                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5634                outAttrs.actionId = mInputContentType.imeActionId;
5635                outAttrs.extras = mInputContentType.extras;
5636            } else {
5637                outAttrs.imeOptions = EditorInfo.IME_NULL;
5638            }
5639            if (focusSearch(FOCUS_DOWN) != null) {
5640                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5641            }
5642            if (focusSearch(FOCUS_UP) != null) {
5643                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5644            }
5645            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5646                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5647                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5648                    // An action has not been set, but the enter key will move to
5649                    // the next focus, so set the action to that.
5650                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5651                } else {
5652                    // An action has not been set, and there is no focus to move
5653                    // to, so let's just supply a "done" action.
5654                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5655                }
5656                if (!shouldAdvanceFocusOnEnter()) {
5657                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5658                }
5659            }
5660            if (isMultilineInputType(outAttrs.inputType)) {
5661                // Multi-line text editors should always show an enter key.
5662                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5663            }
5664            outAttrs.hintText = mHint;
5665            if (mText instanceof Editable) {
5666                InputConnection ic = new EditableInputConnection(this);
5667                outAttrs.initialSelStart = getSelectionStart();
5668                outAttrs.initialSelEnd = getSelectionEnd();
5669                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5670                return ic;
5671            }
5672        }
5673        return null;
5674    }
5675
5676    /**
5677     * If this TextView contains editable content, extract a portion of it
5678     * based on the information in <var>request</var> in to <var>outText</var>.
5679     * @return Returns true if the text was successfully extracted, else false.
5680     */
5681    public boolean extractText(ExtractedTextRequest request,
5682            ExtractedText outText) {
5683        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5684                EXTRACT_UNKNOWN, outText);
5685    }
5686
5687    static final int EXTRACT_NOTHING = -2;
5688    static final int EXTRACT_UNKNOWN = -1;
5689
5690    boolean extractTextInternal(ExtractedTextRequest request,
5691            int partialStartOffset, int partialEndOffset, int delta,
5692            ExtractedText outText) {
5693        final CharSequence content = mText;
5694        if (content != null) {
5695            if (partialStartOffset != EXTRACT_NOTHING) {
5696                final int N = content.length();
5697                if (partialStartOffset < 0) {
5698                    outText.partialStartOffset = outText.partialEndOffset = -1;
5699                    partialStartOffset = 0;
5700                    partialEndOffset = N;
5701                } else {
5702                    // Now use the delta to determine the actual amount of text
5703                    // we need.
5704                    partialEndOffset += delta;
5705                    // Adjust offsets to ensure we contain full spans.
5706                    if (content instanceof Spanned) {
5707                        Spanned spanned = (Spanned)content;
5708                        Object[] spans = spanned.getSpans(partialStartOffset,
5709                                partialEndOffset, ParcelableSpan.class);
5710                        int i = spans.length;
5711                        while (i > 0) {
5712                            i--;
5713                            int j = spanned.getSpanStart(spans[i]);
5714                            if (j < partialStartOffset) partialStartOffset = j;
5715                            j = spanned.getSpanEnd(spans[i]);
5716                            if (j > partialEndOffset) partialEndOffset = j;
5717                        }
5718                    }
5719                    outText.partialStartOffset = partialStartOffset;
5720                    outText.partialEndOffset = partialEndOffset - delta;
5721
5722                    if (partialStartOffset > N) {
5723                        partialStartOffset = N;
5724                    } else if (partialStartOffset < 0) {
5725                        partialStartOffset = 0;
5726                    }
5727                    if (partialEndOffset > N) {
5728                        partialEndOffset = N;
5729                    } else if (partialEndOffset < 0) {
5730                        partialEndOffset = 0;
5731                    }
5732                }
5733                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5734                    outText.text = content.subSequence(partialStartOffset,
5735                            partialEndOffset);
5736                } else {
5737                    outText.text = TextUtils.substring(content, partialStartOffset,
5738                            partialEndOffset);
5739                }
5740            } else {
5741                outText.partialStartOffset = 0;
5742                outText.partialEndOffset = 0;
5743                outText.text = "";
5744            }
5745            outText.flags = 0;
5746            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5747                outText.flags |= ExtractedText.FLAG_SELECTING;
5748            }
5749            if (mSingleLine) {
5750                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5751            }
5752            outText.startOffset = 0;
5753            outText.selectionStart = getSelectionStart();
5754            outText.selectionEnd = getSelectionEnd();
5755            return true;
5756        }
5757        return false;
5758    }
5759
5760    boolean reportExtractedText() {
5761        final InputMethodState ims = mInputMethodState;
5762        if (ims != null) {
5763            final boolean contentChanged = ims.mContentChanged;
5764            if (contentChanged || ims.mSelectionModeChanged) {
5765                ims.mContentChanged = false;
5766                ims.mSelectionModeChanged = false;
5767                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5768                if (req != null) {
5769                    InputMethodManager imm = InputMethodManager.peekInstance();
5770                    if (imm != null) {
5771                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5772                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5773                                + " delta=" + ims.mChangedDelta);
5774                        if (ims.mChangedStart < 0 && !contentChanged) {
5775                            ims.mChangedStart = EXTRACT_NOTHING;
5776                        }
5777                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5778                                ims.mChangedDelta, ims.mTmpExtracted)) {
5779                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5780                                    + ims.mTmpExtracted.partialStartOffset
5781                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5782                                    + ": " + ims.mTmpExtracted.text);
5783                            imm.updateExtractedText(this, req.token,
5784                                    mInputMethodState.mTmpExtracted);
5785                            ims.mChangedStart = EXTRACT_UNKNOWN;
5786                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5787                            ims.mChangedDelta = 0;
5788                            ims.mContentChanged = false;
5789                            return true;
5790                        }
5791                    }
5792                }
5793            }
5794        }
5795        return false;
5796    }
5797
5798    /**
5799     * This is used to remove all style-impacting spans from text before new
5800     * extracted text is being replaced into it, so that we don't have any
5801     * lingering spans applied during the replace.
5802     */
5803    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5804        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5805        int i = spans.length;
5806        while (i > 0) {
5807            i--;
5808            spannable.removeSpan(spans[i]);
5809        }
5810    }
5811
5812    /**
5813     * Apply to this text view the given extracted text, as previously
5814     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5815     */
5816    public void setExtractedText(ExtractedText text) {
5817        Editable content = getEditableText();
5818        if (text.text != null) {
5819            if (content == null) {
5820                setText(text.text, TextView.BufferType.EDITABLE);
5821            } else if (text.partialStartOffset < 0) {
5822                removeParcelableSpans(content, 0, content.length());
5823                content.replace(0, content.length(), text.text);
5824            } else {
5825                final int N = content.length();
5826                int start = text.partialStartOffset;
5827                if (start > N) start = N;
5828                int end = text.partialEndOffset;
5829                if (end > N) end = N;
5830                removeParcelableSpans(content, start, end);
5831                content.replace(start, end, text.text);
5832            }
5833        }
5834
5835        // Now set the selection position...  make sure it is in range, to
5836        // avoid crashes.  If this is a partial update, it is possible that
5837        // the underlying text may have changed, causing us problems here.
5838        // Also we just don't want to trust clients to do the right thing.
5839        Spannable sp = (Spannable)getText();
5840        final int N = sp.length();
5841        int start = text.selectionStart;
5842        if (start < 0) start = 0;
5843        else if (start > N) start = N;
5844        int end = text.selectionEnd;
5845        if (end < 0) end = 0;
5846        else if (end > N) end = N;
5847        Selection.setSelection(sp, start, end);
5848
5849        // Finally, update the selection mode.
5850        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5851            MetaKeyKeyListener.startSelecting(this, sp);
5852        } else {
5853            MetaKeyKeyListener.stopSelecting(this, sp);
5854        }
5855    }
5856
5857    /**
5858     * @hide
5859     */
5860    public void setExtracting(ExtractedTextRequest req) {
5861        if (mInputMethodState != null) {
5862            mInputMethodState.mExtracting = req;
5863        }
5864        // This would stop a possible selection mode, but no such mode is started in case
5865        // extracted mode will start. Some text is selected though, and will trigger an action mode
5866        // in the extracted view.
5867        hideControllers();
5868    }
5869
5870    /**
5871     * Called by the framework in response to a text completion from
5872     * the current input method, provided by it calling
5873     * {@link InputConnection#commitCompletion
5874     * InputConnection.commitCompletion()}.  The default implementation does
5875     * nothing; text views that are supporting auto-completion should override
5876     * this to do their desired behavior.
5877     *
5878     * @param text The auto complete text the user has selected.
5879     */
5880    public void onCommitCompletion(CompletionInfo text) {
5881        // intentionally empty
5882    }
5883
5884    /**
5885     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5886     * a dictionnary) from the current input method, provided by it calling
5887     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5888     * implementation flashes the background of the corrected word to provide feedback to the user.
5889     *
5890     * @param info The auto correct info about the text that was corrected.
5891     */
5892    public void onCommitCorrection(CorrectionInfo info) {
5893        if (mCorrectionHighlighter == null) {
5894            mCorrectionHighlighter = new CorrectionHighlighter();
5895        } else {
5896            mCorrectionHighlighter.invalidate(false);
5897        }
5898
5899        mCorrectionHighlighter.highlight(info);
5900    }
5901
5902    private class CorrectionHighlighter {
5903        private final Path mPath = new Path();
5904        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5905        private int mStart, mEnd;
5906        private long mFadingStartTime;
5907        private final static int FADE_OUT_DURATION = 400;
5908
5909        public CorrectionHighlighter() {
5910            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5911            mPaint.setStyle(Paint.Style.FILL);
5912        }
5913
5914        public void highlight(CorrectionInfo info) {
5915            mStart = info.getOffset();
5916            mEnd = mStart + info.getNewText().length();
5917            mFadingStartTime = SystemClock.uptimeMillis();
5918
5919            if (mStart < 0 || mEnd < 0) {
5920                stopAnimation();
5921            }
5922        }
5923
5924        public void draw(Canvas canvas, int cursorOffsetVertical) {
5925            if (updatePath() && updatePaint()) {
5926                if (cursorOffsetVertical != 0) {
5927                    canvas.translate(0, cursorOffsetVertical);
5928                }
5929
5930                canvas.drawPath(mPath, mPaint);
5931
5932                if (cursorOffsetVertical != 0) {
5933                    canvas.translate(0, -cursorOffsetVertical);
5934                }
5935                invalidate(true); // TODO invalidate cursor region only
5936            } else {
5937                stopAnimation();
5938                invalidate(false); // TODO invalidate cursor region only
5939            }
5940        }
5941
5942        private boolean updatePaint() {
5943            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5944            if (duration > FADE_OUT_DURATION) return false;
5945
5946            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5947            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5948            final int color = (mHighlightColor & 0x00FFFFFF) +
5949                    ((int) (highlightColorAlpha * coef) << 24);
5950            mPaint.setColor(color);
5951            return true;
5952        }
5953
5954        private boolean updatePath() {
5955            final Layout layout = TextView.this.mLayout;
5956            if (layout == null) return false;
5957
5958            // Update in case text is edited while the animation is run
5959            final int length = mText.length();
5960            int start = Math.min(length, mStart);
5961            int end = Math.min(length, mEnd);
5962
5963            mPath.reset();
5964            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5965            return true;
5966        }
5967
5968        private void invalidate(boolean delayed) {
5969            if (TextView.this.mLayout == null) return;
5970
5971            synchronized (sTempRect) {
5972                mPath.computeBounds(sTempRect, false);
5973
5974                int left = getCompoundPaddingLeft();
5975                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5976
5977                if (delayed) {
5978                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5979                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5980                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5981                } else {
5982                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5983                            (int) sTempRect.right, (int) sTempRect.bottom);
5984                }
5985            }
5986        }
5987
5988        private void stopAnimation() {
5989            TextView.this.mCorrectionHighlighter = null;
5990        }
5991    }
5992
5993    public void beginBatchEdit() {
5994        mInBatchEditControllers = true;
5995        final InputMethodState ims = mInputMethodState;
5996        if (ims != null) {
5997            int nesting = ++ims.mBatchEditNesting;
5998            if (nesting == 1) {
5999                ims.mCursorChanged = false;
6000                ims.mChangedDelta = 0;
6001                if (ims.mContentChanged) {
6002                    // We already have a pending change from somewhere else,
6003                    // so turn this into a full update.
6004                    ims.mChangedStart = 0;
6005                    ims.mChangedEnd = mText.length();
6006                } else {
6007                    ims.mChangedStart = EXTRACT_UNKNOWN;
6008                    ims.mChangedEnd = EXTRACT_UNKNOWN;
6009                    ims.mContentChanged = false;
6010                }
6011                onBeginBatchEdit();
6012            }
6013        }
6014    }
6015
6016    public void endBatchEdit() {
6017        mInBatchEditControllers = false;
6018        final InputMethodState ims = mInputMethodState;
6019        if (ims != null) {
6020            int nesting = --ims.mBatchEditNesting;
6021            if (nesting == 0) {
6022                finishBatchEdit(ims);
6023            }
6024        }
6025    }
6026
6027    void ensureEndedBatchEdit() {
6028        final InputMethodState ims = mInputMethodState;
6029        if (ims != null && ims.mBatchEditNesting != 0) {
6030            ims.mBatchEditNesting = 0;
6031            finishBatchEdit(ims);
6032        }
6033    }
6034
6035    void finishBatchEdit(final InputMethodState ims) {
6036        onEndBatchEdit();
6037
6038        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6039            updateAfterEdit();
6040            reportExtractedText();
6041        } else if (ims.mCursorChanged) {
6042            // Cheezy way to get us to report the current cursor location.
6043            invalidateCursor();
6044        }
6045    }
6046
6047    void updateAfterEdit() {
6048        invalidate();
6049        int curs = getSelectionStart();
6050
6051        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6052            registerForPreDraw();
6053        }
6054
6055        if (curs >= 0) {
6056            mHighlightPathBogus = true;
6057            makeBlink();
6058            bringPointIntoView(curs);
6059        }
6060
6061        checkForResize();
6062    }
6063
6064    /**
6065     * Called by the framework in response to a request to begin a batch
6066     * of edit operations through a call to link {@link #beginBatchEdit()}.
6067     */
6068    public void onBeginBatchEdit() {
6069        // intentionally empty
6070    }
6071
6072    /**
6073     * Called by the framework in response to a request to end a batch
6074     * of edit operations through a call to link {@link #endBatchEdit}.
6075     */
6076    public void onEndBatchEdit() {
6077        // intentionally empty
6078    }
6079
6080    /**
6081     * Called by the framework in response to a private command from the
6082     * current method, provided by it calling
6083     * {@link InputConnection#performPrivateCommand
6084     * InputConnection.performPrivateCommand()}.
6085     *
6086     * @param action The action name of the command.
6087     * @param data Any additional data for the command.  This may be null.
6088     * @return Return true if you handled the command, else false.
6089     */
6090    public boolean onPrivateIMECommand(String action, Bundle data) {
6091        return false;
6092    }
6093
6094    private void nullLayouts() {
6095        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6096            mSavedLayout = (BoringLayout) mLayout;
6097        }
6098        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6099            mSavedHintLayout = (BoringLayout) mHintLayout;
6100        }
6101
6102        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6103
6104        mBoring = mHintBoring = null;
6105
6106        // Since it depends on the value of mLayout
6107        prepareCursorControllers();
6108    }
6109
6110    /**
6111     * Make a new Layout based on the already-measured size of the view,
6112     * on the assumption that it was measured correctly at some point.
6113     */
6114    private void assumeLayout() {
6115        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6116
6117        if (width < 1) {
6118            width = 0;
6119        }
6120
6121        int physicalWidth = width;
6122
6123        if (mHorizontallyScrolling) {
6124            width = VERY_WIDE;
6125        }
6126
6127        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6128                      physicalWidth, false);
6129    }
6130
6131    @Override
6132    protected void resetResolvedLayoutDirection() {
6133        super.resetResolvedLayoutDirection();
6134
6135        if (mLayoutAlignment != null &&
6136                (mTextAlign == TextAlign.VIEW_START ||
6137                mTextAlign == TextAlign.VIEW_END)) {
6138            mLayoutAlignment = null;
6139        }
6140    }
6141
6142    private Layout.Alignment getLayoutAlignment() {
6143        if (mLayoutAlignment == null) {
6144            Layout.Alignment alignment;
6145            TextAlign textAlign = mTextAlign;
6146            switch (textAlign) {
6147                case INHERIT:
6148                    // fall through to gravity temporarily
6149                    // intention is to inherit value through view hierarchy.
6150                case GRAVITY:
6151                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6152                        case Gravity.START:
6153                            alignment = Layout.Alignment.ALIGN_NORMAL;
6154                            break;
6155                        case Gravity.END:
6156                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6157                            break;
6158                        case Gravity.LEFT:
6159                            alignment = Layout.Alignment.ALIGN_LEFT;
6160                            break;
6161                        case Gravity.RIGHT:
6162                            alignment = Layout.Alignment.ALIGN_RIGHT;
6163                            break;
6164                        case Gravity.CENTER_HORIZONTAL:
6165                            alignment = Layout.Alignment.ALIGN_CENTER;
6166                            break;
6167                        default:
6168                            alignment = Layout.Alignment.ALIGN_NORMAL;
6169                            break;
6170                    }
6171                    break;
6172                case TEXT_START:
6173                    alignment = Layout.Alignment.ALIGN_NORMAL;
6174                    break;
6175                case TEXT_END:
6176                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6177                    break;
6178                case CENTER:
6179                    alignment = Layout.Alignment.ALIGN_CENTER;
6180                    break;
6181                case VIEW_START:
6182                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6183                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6184                    break;
6185                case VIEW_END:
6186                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6187                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6188                    break;
6189                default:
6190                    alignment = Layout.Alignment.ALIGN_NORMAL;
6191                    break;
6192            }
6193            mLayoutAlignment = alignment;
6194        }
6195        return mLayoutAlignment;
6196    }
6197
6198    /**
6199     * The width passed in is now the desired layout width,
6200     * not the full view width with padding.
6201     * {@hide}
6202     */
6203    protected void makeNewLayout(int wantWidth, int hintWidth,
6204                                 BoringLayout.Metrics boring,
6205                                 BoringLayout.Metrics hintBoring,
6206                                 int ellipsisWidth, boolean bringIntoView) {
6207        stopMarquee();
6208
6209        // Update "old" cached values
6210        mOldMaximum = mMaximum;
6211        mOldMaxMode = mMaxMode;
6212
6213        mHighlightPathBogus = true;
6214
6215        if (wantWidth < 0) {
6216            wantWidth = 0;
6217        }
6218        if (hintWidth < 0) {
6219            hintWidth = 0;
6220        }
6221
6222        Layout.Alignment alignment = getLayoutAlignment();
6223        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6224        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6225                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6226        TruncateAt effectiveEllipsize = mEllipsize;
6227        if (mEllipsize == TruncateAt.MARQUEE &&
6228                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6229            effectiveEllipsize = TruncateAt.END_SMALL;
6230        }
6231
6232        if (mTextDir == null) {
6233            resolveTextDirection();
6234        }
6235
6236        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6237                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6238        if (switchEllipsize) {
6239            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6240                    TruncateAt.END : TruncateAt.MARQUEE;
6241            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6242                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6243        }
6244
6245        shouldEllipsize = mEllipsize != null;
6246        mHintLayout = null;
6247
6248        if (mHint != null) {
6249            if (shouldEllipsize) hintWidth = wantWidth;
6250
6251            if (hintBoring == UNKNOWN_BORING) {
6252                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6253                                                   mHintBoring);
6254                if (hintBoring != null) {
6255                    mHintBoring = hintBoring;
6256                }
6257            }
6258
6259            if (hintBoring != null) {
6260                if (hintBoring.width <= hintWidth &&
6261                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6262                    if (mSavedHintLayout != null) {
6263                        mHintLayout = mSavedHintLayout.
6264                                replaceOrMake(mHint, mTextPaint,
6265                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6266                                hintBoring, mIncludePad);
6267                    } else {
6268                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6269                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6270                                hintBoring, mIncludePad);
6271                    }
6272
6273                    mSavedHintLayout = (BoringLayout) mHintLayout;
6274                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6275                    if (mSavedHintLayout != null) {
6276                        mHintLayout = mSavedHintLayout.
6277                                replaceOrMake(mHint, mTextPaint,
6278                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6279                                hintBoring, mIncludePad, mEllipsize,
6280                                ellipsisWidth);
6281                    } else {
6282                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6283                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6284                                hintBoring, mIncludePad, mEllipsize,
6285                                ellipsisWidth);
6286                    }
6287                } else if (shouldEllipsize) {
6288                    mHintLayout = new StaticLayout(mHint,
6289                                0, mHint.length(),
6290                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6291                                mSpacingAdd, mIncludePad, mEllipsize,
6292                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6293                } else {
6294                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6295                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6296                            mIncludePad);
6297                }
6298            } else if (shouldEllipsize) {
6299                mHintLayout = new StaticLayout(mHint,
6300                            0, mHint.length(),
6301                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6302                            mSpacingAdd, mIncludePad, mEllipsize,
6303                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6304            } else {
6305                mHintLayout = new StaticLayout(mHint, mTextPaint,
6306                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6307                        mIncludePad);
6308            }
6309        }
6310
6311        if (bringIntoView) {
6312            registerForPreDraw();
6313        }
6314
6315        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6316            if (!compressText(ellipsisWidth)) {
6317                final int height = mLayoutParams.height;
6318                // If the size of the view does not depend on the size of the text, try to
6319                // start the marquee immediately
6320                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6321                    startMarquee();
6322                } else {
6323                    // Defer the start of the marquee until we know our width (see setFrame())
6324                    mRestartMarquee = true;
6325                }
6326            }
6327        }
6328
6329        // CursorControllers need a non-null mLayout
6330        prepareCursorControllers();
6331    }
6332
6333    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6334            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6335            boolean useSaved) {
6336        Layout result = null;
6337        if (mText instanceof Spannable) {
6338            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6339                    alignment, mTextDir, mSpacingMult,
6340                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6341                            ellipsisWidth);
6342        } else {
6343            if (boring == UNKNOWN_BORING) {
6344                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6345                if (boring != null) {
6346                    mBoring = boring;
6347                }
6348            }
6349
6350            if (boring != null) {
6351                if (boring.width <= wantWidth &&
6352                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6353                    if (useSaved && mSavedLayout != null) {
6354                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6355                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6356                                boring, mIncludePad);
6357                    } else {
6358                        result = BoringLayout.make(mTransformed, mTextPaint,
6359                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6360                                boring, mIncludePad);
6361                    }
6362
6363                    if (useSaved) {
6364                        mSavedLayout = (BoringLayout) result;
6365                    }
6366                } else if (shouldEllipsize && boring.width <= wantWidth) {
6367                    if (useSaved && mSavedLayout != null) {
6368                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6369                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6370                                boring, mIncludePad, effectiveEllipsize,
6371                                ellipsisWidth);
6372                    } else {
6373                        result = BoringLayout.make(mTransformed, mTextPaint,
6374                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6375                                boring, mIncludePad, effectiveEllipsize,
6376                                ellipsisWidth);
6377                    }
6378                } else if (shouldEllipsize) {
6379                    result = new StaticLayout(mTransformed,
6380                            0, mTransformed.length(),
6381                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6382                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6383                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6384                } else {
6385                    result = new StaticLayout(mTransformed, mTextPaint,
6386                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6387                            mIncludePad);
6388                }
6389            } else if (shouldEllipsize) {
6390                result = new StaticLayout(mTransformed,
6391                        0, mTransformed.length(),
6392                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6393                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6394                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6395            } else {
6396                result = new StaticLayout(mTransformed, mTextPaint,
6397                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6398                        mIncludePad);
6399            }
6400        }
6401        return result;
6402    }
6403
6404    private boolean compressText(float width) {
6405        if (isHardwareAccelerated()) return false;
6406
6407        // Only compress the text if it hasn't been compressed by the previous pass
6408        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6409                mTextPaint.getTextScaleX() == 1.0f) {
6410            final float textWidth = mLayout.getLineWidth(0);
6411            final float overflow = (textWidth + 1.0f - width) / width;
6412            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6413                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6414                post(new Runnable() {
6415                    public void run() {
6416                        requestLayout();
6417                    }
6418                });
6419                return true;
6420            }
6421        }
6422
6423        return false;
6424    }
6425
6426    private static int desired(Layout layout) {
6427        int n = layout.getLineCount();
6428        CharSequence text = layout.getText();
6429        float max = 0;
6430
6431        // if any line was wrapped, we can't use it.
6432        // but it's ok for the last line not to have a newline
6433
6434        for (int i = 0; i < n - 1; i++) {
6435            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6436                return -1;
6437        }
6438
6439        for (int i = 0; i < n; i++) {
6440            max = Math.max(max, layout.getLineWidth(i));
6441        }
6442
6443        return (int) FloatMath.ceil(max);
6444    }
6445
6446    /**
6447     * Set whether the TextView includes extra top and bottom padding to make
6448     * room for accents that go above the normal ascent and descent.
6449     * The default is true.
6450     *
6451     * @attr ref android.R.styleable#TextView_includeFontPadding
6452     */
6453    public void setIncludeFontPadding(boolean includepad) {
6454        if (mIncludePad != includepad) {
6455            mIncludePad = includepad;
6456
6457            if (mLayout != null) {
6458                nullLayouts();
6459                requestLayout();
6460                invalidate();
6461            }
6462        }
6463    }
6464
6465    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6466
6467    @Override
6468    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6469        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6470        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6471        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6472        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6473
6474        int width;
6475        int height;
6476
6477        BoringLayout.Metrics boring = UNKNOWN_BORING;
6478        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6479
6480        if (mTextDir == null) {
6481            resolveTextDirection();
6482        }
6483
6484        int des = -1;
6485        boolean fromexisting = false;
6486
6487        if (widthMode == MeasureSpec.EXACTLY) {
6488            // Parent has told us how big to be. So be it.
6489            width = widthSize;
6490        } else {
6491            if (mLayout != null && mEllipsize == null) {
6492                des = desired(mLayout);
6493            }
6494
6495            if (des < 0) {
6496                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6497                if (boring != null) {
6498                    mBoring = boring;
6499                }
6500            } else {
6501                fromexisting = true;
6502            }
6503
6504            if (boring == null || boring == UNKNOWN_BORING) {
6505                if (des < 0) {
6506                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6507                }
6508
6509                width = des;
6510            } else {
6511                width = boring.width;
6512            }
6513
6514            final Drawables dr = mDrawables;
6515            if (dr != null) {
6516                width = Math.max(width, dr.mDrawableWidthTop);
6517                width = Math.max(width, dr.mDrawableWidthBottom);
6518            }
6519
6520            if (mHint != null) {
6521                int hintDes = -1;
6522                int hintWidth;
6523
6524                if (mHintLayout != null && mEllipsize == null) {
6525                    hintDes = desired(mHintLayout);
6526                }
6527
6528                if (hintDes < 0) {
6529                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6530                    if (hintBoring != null) {
6531                        mHintBoring = hintBoring;
6532                    }
6533                }
6534
6535                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6536                    if (hintDes < 0) {
6537                        hintDes = (int) FloatMath.ceil(
6538                                Layout.getDesiredWidth(mHint, mTextPaint));
6539                    }
6540
6541                    hintWidth = hintDes;
6542                } else {
6543                    hintWidth = hintBoring.width;
6544                }
6545
6546                if (hintWidth > width) {
6547                    width = hintWidth;
6548                }
6549            }
6550
6551            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6552
6553            if (mMaxWidthMode == EMS) {
6554                width = Math.min(width, mMaxWidth * getLineHeight());
6555            } else {
6556                width = Math.min(width, mMaxWidth);
6557            }
6558
6559            if (mMinWidthMode == EMS) {
6560                width = Math.max(width, mMinWidth * getLineHeight());
6561            } else {
6562                width = Math.max(width, mMinWidth);
6563            }
6564
6565            // Check against our minimum width
6566            width = Math.max(width, getSuggestedMinimumWidth());
6567
6568            if (widthMode == MeasureSpec.AT_MOST) {
6569                width = Math.min(widthSize, width);
6570            }
6571        }
6572
6573        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6574        int unpaddedWidth = want;
6575
6576        if (mHorizontallyScrolling) want = VERY_WIDE;
6577
6578        int hintWant = want;
6579        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6580
6581        if (mLayout == null) {
6582            makeNewLayout(want, hintWant, boring, hintBoring,
6583                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6584        } else {
6585            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6586                    (hintWidth != hintWant) ||
6587                    (mLayout.getEllipsizedWidth() !=
6588                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6589
6590            final boolean widthChanged = (mHint == null) &&
6591                    (mEllipsize == null) &&
6592                    (want > mLayout.getWidth()) &&
6593                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6594
6595            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6596
6597            if (layoutChanged || maximumChanged) {
6598                if (!maximumChanged && widthChanged) {
6599                    mLayout.increaseWidthTo(want);
6600                } else {
6601                    makeNewLayout(want, hintWant, boring, hintBoring,
6602                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6603                }
6604            } else {
6605                // Nothing has changed
6606            }
6607        }
6608
6609        if (heightMode == MeasureSpec.EXACTLY) {
6610            // Parent has told us how big to be. So be it.
6611            height = heightSize;
6612            mDesiredHeightAtMeasure = -1;
6613        } else {
6614            int desired = getDesiredHeight();
6615
6616            height = desired;
6617            mDesiredHeightAtMeasure = desired;
6618
6619            if (heightMode == MeasureSpec.AT_MOST) {
6620                height = Math.min(desired, heightSize);
6621            }
6622        }
6623
6624        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6625        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6626            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6627        }
6628
6629        /*
6630         * We didn't let makeNewLayout() register to bring the cursor into view,
6631         * so do it here if there is any possibility that it is needed.
6632         */
6633        if (mMovement != null ||
6634            mLayout.getWidth() > unpaddedWidth ||
6635            mLayout.getHeight() > unpaddedHeight) {
6636            registerForPreDraw();
6637        } else {
6638            scrollTo(0, 0);
6639        }
6640
6641        setMeasuredDimension(width, height);
6642    }
6643
6644    private int getDesiredHeight() {
6645        return Math.max(
6646                getDesiredHeight(mLayout, true),
6647                getDesiredHeight(mHintLayout, mEllipsize != null));
6648    }
6649
6650    private int getDesiredHeight(Layout layout, boolean cap) {
6651        if (layout == null) {
6652            return 0;
6653        }
6654
6655        int linecount = layout.getLineCount();
6656        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6657        int desired = layout.getLineTop(linecount);
6658
6659        final Drawables dr = mDrawables;
6660        if (dr != null) {
6661            desired = Math.max(desired, dr.mDrawableHeightLeft);
6662            desired = Math.max(desired, dr.mDrawableHeightRight);
6663        }
6664
6665        desired += pad;
6666
6667        if (mMaxMode == LINES) {
6668            /*
6669             * Don't cap the hint to a certain number of lines.
6670             * (Do cap it, though, if we have a maximum pixel height.)
6671             */
6672            if (cap) {
6673                if (linecount > mMaximum) {
6674                    desired = layout.getLineTop(mMaximum);
6675
6676                    if (dr != null) {
6677                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6678                        desired = Math.max(desired, dr.mDrawableHeightRight);
6679                    }
6680
6681                    desired += pad;
6682                    linecount = mMaximum;
6683                }
6684            }
6685        } else {
6686            desired = Math.min(desired, mMaximum);
6687        }
6688
6689        if (mMinMode == LINES) {
6690            if (linecount < mMinimum) {
6691                desired += getLineHeight() * (mMinimum - linecount);
6692            }
6693        } else {
6694            desired = Math.max(desired, mMinimum);
6695        }
6696
6697        // Check against our minimum height
6698        desired = Math.max(desired, getSuggestedMinimumHeight());
6699
6700        return desired;
6701    }
6702
6703    /**
6704     * Check whether a change to the existing text layout requires a
6705     * new view layout.
6706     */
6707    private void checkForResize() {
6708        boolean sizeChanged = false;
6709
6710        if (mLayout != null) {
6711            // Check if our width changed
6712            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6713                sizeChanged = true;
6714                invalidate();
6715            }
6716
6717            // Check if our height changed
6718            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6719                int desiredHeight = getDesiredHeight();
6720
6721                if (desiredHeight != this.getHeight()) {
6722                    sizeChanged = true;
6723                }
6724            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6725                if (mDesiredHeightAtMeasure >= 0) {
6726                    int desiredHeight = getDesiredHeight();
6727
6728                    if (desiredHeight != mDesiredHeightAtMeasure) {
6729                        sizeChanged = true;
6730                    }
6731                }
6732            }
6733        }
6734
6735        if (sizeChanged) {
6736            requestLayout();
6737            // caller will have already invalidated
6738        }
6739    }
6740
6741    /**
6742     * Check whether entirely new text requires a new view layout
6743     * or merely a new text layout.
6744     */
6745    private void checkForRelayout() {
6746        // If we have a fixed width, we can just swap in a new text layout
6747        // if the text height stays the same or if the view height is fixed.
6748
6749        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6750                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6751                (mHint == null || mHintLayout != null) &&
6752                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6753            // Static width, so try making a new text layout.
6754
6755            int oldht = mLayout.getHeight();
6756            int want = mLayout.getWidth();
6757            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6758
6759            /*
6760             * No need to bring the text into view, since the size is not
6761             * changing (unless we do the requestLayout(), in which case it
6762             * will happen at measure).
6763             */
6764            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6765                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6766                          false);
6767
6768            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6769                // In a fixed-height view, so use our new text layout.
6770                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6771                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6772                    invalidate();
6773                    return;
6774                }
6775
6776                // Dynamic height, but height has stayed the same,
6777                // so use our new text layout.
6778                if (mLayout.getHeight() == oldht &&
6779                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6780                    invalidate();
6781                    return;
6782                }
6783            }
6784
6785            // We lose: the height has changed and we have a dynamic height.
6786            // Request a new view layout using our new text layout.
6787            requestLayout();
6788            invalidate();
6789        } else {
6790            // Dynamic width, so we have no choice but to request a new
6791            // view layout with a new text layout.
6792            nullLayouts();
6793            requestLayout();
6794            invalidate();
6795        }
6796    }
6797
6798    @Override
6799    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
6800        super.onLayout(changed, left, top, right, bottom);
6801        if (changed) mTextDisplayListIsValid = false;
6802    }
6803
6804    /**
6805     * Returns true if anything changed.
6806     */
6807    private boolean bringTextIntoView() {
6808        int line = 0;
6809        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6810            line = mLayout.getLineCount() - 1;
6811        }
6812
6813        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6814        int dir = mLayout.getParagraphDirection(line);
6815        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6816        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6817        int ht = mLayout.getHeight();
6818
6819        int scrollx, scrolly;
6820
6821        // Convert to left, center, or right alignment.
6822        if (a == Layout.Alignment.ALIGN_NORMAL) {
6823            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6824                Layout.Alignment.ALIGN_RIGHT;
6825        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6826            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6827                Layout.Alignment.ALIGN_LEFT;
6828        }
6829
6830        if (a == Layout.Alignment.ALIGN_CENTER) {
6831            /*
6832             * Keep centered if possible, or, if it is too wide to fit,
6833             * keep leading edge in view.
6834             */
6835
6836            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6837            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6838
6839            if (right - left < hspace) {
6840                scrollx = (right + left) / 2 - hspace / 2;
6841            } else {
6842                if (dir < 0) {
6843                    scrollx = right - hspace;
6844                } else {
6845                    scrollx = left;
6846                }
6847            }
6848        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6849            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6850            scrollx = right - hspace;
6851        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6852            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6853        }
6854
6855        if (ht < vspace) {
6856            scrolly = 0;
6857        } else {
6858            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6859                scrolly = ht - vspace;
6860            } else {
6861                scrolly = 0;
6862            }
6863        }
6864
6865        if (scrollx != mScrollX || scrolly != mScrollY) {
6866            scrollTo(scrollx, scrolly);
6867            return true;
6868        } else {
6869            return false;
6870        }
6871    }
6872
6873    /**
6874     * Move the point, specified by the offset, into the view if it is needed.
6875     * This has to be called after layout. Returns true if anything changed.
6876     */
6877    public boolean bringPointIntoView(int offset) {
6878        boolean changed = false;
6879
6880        if (mLayout == null) return changed;
6881
6882        int line = mLayout.getLineForOffset(offset);
6883
6884        // FIXME: Is it okay to truncate this, or should we round?
6885        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6886        final int top = mLayout.getLineTop(line);
6887        final int bottom = mLayout.getLineTop(line + 1);
6888
6889        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6890        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6891        int ht = mLayout.getHeight();
6892
6893        int grav;
6894
6895        switch (mLayout.getParagraphAlignment(line)) {
6896            case ALIGN_LEFT:
6897                grav = 1;
6898                break;
6899            case ALIGN_RIGHT:
6900                grav = -1;
6901                break;
6902            case ALIGN_NORMAL:
6903                grav = mLayout.getParagraphDirection(line);
6904                break;
6905            case ALIGN_OPPOSITE:
6906                grav = -mLayout.getParagraphDirection(line);
6907                break;
6908            case ALIGN_CENTER:
6909            default:
6910                grav = 0;
6911                break;
6912        }
6913
6914        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6915        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6916
6917        int hslack = (bottom - top) / 2;
6918        int vslack = hslack;
6919
6920        if (vslack > vspace / 4)
6921            vslack = vspace / 4;
6922        if (hslack > hspace / 4)
6923            hslack = hspace / 4;
6924
6925        int hs = mScrollX;
6926        int vs = mScrollY;
6927
6928        if (top - vs < vslack)
6929            vs = top - vslack;
6930        if (bottom - vs > vspace - vslack)
6931            vs = bottom - (vspace - vslack);
6932        if (ht - vs < vspace)
6933            vs = ht - vspace;
6934        if (0 - vs > 0)
6935            vs = 0;
6936
6937        if (grav != 0) {
6938            if (x - hs < hslack) {
6939                hs = x - hslack;
6940            }
6941            if (x - hs > hspace - hslack) {
6942                hs = x - (hspace - hslack);
6943            }
6944        }
6945
6946        if (grav < 0) {
6947            if (left - hs > 0)
6948                hs = left;
6949            if (right - hs < hspace)
6950                hs = right - hspace;
6951        } else if (grav > 0) {
6952            if (right - hs < hspace)
6953                hs = right - hspace;
6954            if (left - hs > 0)
6955                hs = left;
6956        } else /* grav == 0 */ {
6957            if (right - left <= hspace) {
6958                /*
6959                 * If the entire text fits, center it exactly.
6960                 */
6961                hs = left - (hspace - (right - left)) / 2;
6962            } else if (x > right - hslack) {
6963                /*
6964                 * If we are near the right edge, keep the right edge
6965                 * at the edge of the view.
6966                 */
6967                hs = right - hspace;
6968            } else if (x < left + hslack) {
6969                /*
6970                 * If we are near the left edge, keep the left edge
6971                 * at the edge of the view.
6972                 */
6973                hs = left;
6974            } else if (left > hs) {
6975                /*
6976                 * Is there whitespace visible at the left?  Fix it if so.
6977                 */
6978                hs = left;
6979            } else if (right < hs + hspace) {
6980                /*
6981                 * Is there whitespace visible at the right?  Fix it if so.
6982                 */
6983                hs = right - hspace;
6984            } else {
6985                /*
6986                 * Otherwise, float as needed.
6987                 */
6988                if (x - hs < hslack) {
6989                    hs = x - hslack;
6990                }
6991                if (x - hs > hspace - hslack) {
6992                    hs = x - (hspace - hslack);
6993                }
6994            }
6995        }
6996
6997        if (hs != mScrollX || vs != mScrollY) {
6998            if (mScroller == null) {
6999                scrollTo(hs, vs);
7000            } else {
7001                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
7002                int dx = hs - mScrollX;
7003                int dy = vs - mScrollY;
7004
7005                if (duration > ANIMATED_SCROLL_GAP) {
7006                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
7007                    awakenScrollBars(mScroller.getDuration());
7008                    invalidate();
7009                } else {
7010                    if (!mScroller.isFinished()) {
7011                        mScroller.abortAnimation();
7012                    }
7013
7014                    scrollBy(dx, dy);
7015                }
7016
7017                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
7018            }
7019
7020            changed = true;
7021        }
7022
7023        if (isFocused()) {
7024            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
7025            // requestRectangleOnScreen() is in terms of content coordinates.
7026
7027            if (mTempRect == null) mTempRect = new Rect();
7028            // The offsets here are to ensure the rectangle we are using is
7029            // within our view bounds, in case the cursor is on the far left
7030            // or right.  If it isn't withing the bounds, then this request
7031            // will be ignored.
7032            mTempRect.set(x - 2, top, x + 2, bottom);
7033            getInterestingRect(mTempRect, line);
7034            mTempRect.offset(mScrollX, mScrollY);
7035
7036            if (requestRectangleOnScreen(mTempRect)) {
7037                changed = true;
7038            }
7039        }
7040
7041        return changed;
7042    }
7043
7044    /**
7045     * Move the cursor, if needed, so that it is at an offset that is visible
7046     * to the user.  This will not move the cursor if it represents more than
7047     * one character (a selection range).  This will only work if the
7048     * TextView contains spannable text; otherwise it will do nothing.
7049     *
7050     * @return True if the cursor was actually moved, false otherwise.
7051     */
7052    public boolean moveCursorToVisibleOffset() {
7053        if (!(mText instanceof Spannable)) {
7054            return false;
7055        }
7056        int start = getSelectionStart();
7057        int end = getSelectionEnd();
7058        if (start != end) {
7059            return false;
7060        }
7061
7062        // First: make sure the line is visible on screen:
7063
7064        int line = mLayout.getLineForOffset(start);
7065
7066        final int top = mLayout.getLineTop(line);
7067        final int bottom = mLayout.getLineTop(line + 1);
7068        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7069        int vslack = (bottom - top) / 2;
7070        if (vslack > vspace / 4)
7071            vslack = vspace / 4;
7072        final int vs = mScrollY;
7073
7074        if (top < (vs+vslack)) {
7075            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7076        } else if (bottom > (vspace+vs-vslack)) {
7077            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7078        }
7079
7080        // Next: make sure the character is visible on screen:
7081
7082        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7083        final int hs = mScrollX;
7084        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7085        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7086
7087        // line might contain bidirectional text
7088        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7089        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7090
7091        int newStart = start;
7092        if (newStart < lowChar) {
7093            newStart = lowChar;
7094        } else if (newStart > highChar) {
7095            newStart = highChar;
7096        }
7097
7098        if (newStart != start) {
7099            Selection.setSelection((Spannable)mText, newStart);
7100            return true;
7101        }
7102
7103        return false;
7104    }
7105
7106    @Override
7107    public void computeScroll() {
7108        if (mScroller != null) {
7109            if (mScroller.computeScrollOffset()) {
7110                mScrollX = mScroller.getCurrX();
7111                mScrollY = mScroller.getCurrY();
7112                invalidateParentCaches();
7113                postInvalidate();  // So we draw again
7114            }
7115        }
7116    }
7117
7118    private void getInterestingRect(Rect r, int line) {
7119        convertFromViewportToContentCoordinates(r);
7120
7121        // Rectangle can can be expanded on first and last line to take
7122        // padding into account.
7123        // TODO Take left/right padding into account too?
7124        if (line == 0) r.top -= getExtendedPaddingTop();
7125        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7126    }
7127
7128    private void convertFromViewportToContentCoordinates(Rect r) {
7129        final int horizontalOffset = viewportToContentHorizontalOffset();
7130        r.left += horizontalOffset;
7131        r.right += horizontalOffset;
7132
7133        final int verticalOffset = viewportToContentVerticalOffset();
7134        r.top += verticalOffset;
7135        r.bottom += verticalOffset;
7136    }
7137
7138    private int viewportToContentHorizontalOffset() {
7139        return getCompoundPaddingLeft() - mScrollX;
7140    }
7141
7142    private int viewportToContentVerticalOffset() {
7143        int offset = getExtendedPaddingTop() - mScrollY;
7144        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7145            offset += getVerticalOffset(false);
7146        }
7147        return offset;
7148    }
7149
7150    @Override
7151    public void debug(int depth) {
7152        super.debug(depth);
7153
7154        String output = debugIndent(depth);
7155        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7156                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7157                + "} ";
7158
7159        if (mText != null) {
7160
7161            output += "mText=\"" + mText + "\" ";
7162            if (mLayout != null) {
7163                output += "mLayout width=" + mLayout.getWidth()
7164                        + " height=" + mLayout.getHeight();
7165            }
7166        } else {
7167            output += "mText=NULL";
7168        }
7169        Log.d(VIEW_LOG_TAG, output);
7170    }
7171
7172    /**
7173     * Convenience for {@link Selection#getSelectionStart}.
7174     */
7175    @ViewDebug.ExportedProperty(category = "text")
7176    public int getSelectionStart() {
7177        return Selection.getSelectionStart(getText());
7178    }
7179
7180    /**
7181     * Convenience for {@link Selection#getSelectionEnd}.
7182     */
7183    @ViewDebug.ExportedProperty(category = "text")
7184    public int getSelectionEnd() {
7185        return Selection.getSelectionEnd(getText());
7186    }
7187
7188    /**
7189     * Return true iff there is a selection inside this text view.
7190     */
7191    public boolean hasSelection() {
7192        final int selectionStart = getSelectionStart();
7193        final int selectionEnd = getSelectionEnd();
7194
7195        return selectionStart >= 0 && selectionStart != selectionEnd;
7196    }
7197
7198    /**
7199     * Sets the properties of this field (lines, horizontally scrolling,
7200     * transformation method) to be for a single-line input.
7201     *
7202     * @attr ref android.R.styleable#TextView_singleLine
7203     */
7204    public void setSingleLine() {
7205        setSingleLine(true);
7206    }
7207
7208    /**
7209     * Sets the properties of this field to transform input to ALL CAPS
7210     * display. This may use a "small caps" formatting if available.
7211     * This setting will be ignored if this field is editable or selectable.
7212     *
7213     * This call replaces the current transformation method. Disabling this
7214     * will not necessarily restore the previous behavior from before this
7215     * was enabled.
7216     *
7217     * @see #setTransformationMethod(TransformationMethod)
7218     * @attr ref android.R.styleable#TextView_textAllCaps
7219     */
7220    public void setAllCaps(boolean allCaps) {
7221        if (allCaps) {
7222            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7223        } else {
7224            setTransformationMethod(null);
7225        }
7226    }
7227
7228    /**
7229     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7230     * transformation method) to be for a single-line input; if false, restores these to the default
7231     * conditions.
7232     *
7233     * Note that the default conditions are not necessarily those that were in effect prior this
7234     * method, and you may want to reset these properties to your custom values.
7235     *
7236     * @attr ref android.R.styleable#TextView_singleLine
7237     */
7238    @android.view.RemotableViewMethod
7239    public void setSingleLine(boolean singleLine) {
7240        // Could be used, but may break backward compatibility.
7241        // if (mSingleLine == singleLine) return;
7242        setInputTypeSingleLine(singleLine);
7243        applySingleLine(singleLine, true, true);
7244    }
7245
7246    /**
7247     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7248     * @param singleLine
7249     */
7250    private void setInputTypeSingleLine(boolean singleLine) {
7251        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7252            if (singleLine) {
7253                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7254            } else {
7255                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7256            }
7257        }
7258    }
7259
7260    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7261            boolean changeMaxLines) {
7262        mSingleLine = singleLine;
7263        if (singleLine) {
7264            setLines(1);
7265            setHorizontallyScrolling(true);
7266            if (applyTransformation) {
7267                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7268            }
7269        } else {
7270            if (changeMaxLines) {
7271                setMaxLines(Integer.MAX_VALUE);
7272            }
7273            setHorizontallyScrolling(false);
7274            if (applyTransformation) {
7275                setTransformationMethod(null);
7276            }
7277        }
7278    }
7279
7280    /**
7281     * Causes words in the text that are longer than the view is wide
7282     * to be ellipsized instead of broken in the middle.  You may also
7283     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7284     * to constrain the text to a single line.  Use <code>null</code>
7285     * to turn off ellipsizing.
7286     *
7287     * If {@link #setMaxLines} has been used to set two or more lines,
7288     * {@link android.text.TextUtils.TruncateAt#END} and
7289     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7290     * (other ellipsizing types will not do anything).
7291     *
7292     * @attr ref android.R.styleable#TextView_ellipsize
7293     */
7294    public void setEllipsize(TextUtils.TruncateAt where) {
7295        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7296        if (mEllipsize != where) {
7297            mEllipsize = where;
7298
7299            if (mLayout != null) {
7300                nullLayouts();
7301                requestLayout();
7302                invalidate();
7303            }
7304        }
7305    }
7306
7307    /**
7308     * Sets how many times to repeat the marquee animation. Only applied if the
7309     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7310     *
7311     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7312     */
7313    public void setMarqueeRepeatLimit(int marqueeLimit) {
7314        mMarqueeRepeatLimit = marqueeLimit;
7315    }
7316
7317    /**
7318     * Returns where, if anywhere, words that are longer than the view
7319     * is wide should be ellipsized.
7320     */
7321    @ViewDebug.ExportedProperty
7322    public TextUtils.TruncateAt getEllipsize() {
7323        return mEllipsize;
7324    }
7325
7326    /**
7327     * Set the TextView so that when it takes focus, all the text is
7328     * selected.
7329     *
7330     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7331     */
7332    @android.view.RemotableViewMethod
7333    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7334        mSelectAllOnFocus = selectAllOnFocus;
7335
7336        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7337            setText(mText, BufferType.SPANNABLE);
7338        }
7339    }
7340
7341    /**
7342     * Set whether the cursor is visible.  The default is true.
7343     *
7344     * @attr ref android.R.styleable#TextView_cursorVisible
7345     */
7346    @android.view.RemotableViewMethod
7347    public void setCursorVisible(boolean visible) {
7348        if (mCursorVisible != visible) {
7349            mCursorVisible = visible;
7350            invalidate();
7351
7352            makeBlink();
7353
7354            // InsertionPointCursorController depends on mCursorVisible
7355            prepareCursorControllers();
7356        }
7357    }
7358
7359    private boolean isCursorVisible() {
7360        return mCursorVisible && isTextEditable();
7361    }
7362
7363    private boolean canMarquee() {
7364        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7365        return width > 0 && (mLayout.getLineWidth(0) > width ||
7366                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7367                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7368    }
7369
7370    private void startMarquee() {
7371        // Do not ellipsize EditText
7372        if (mInput != null) return;
7373
7374        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7375            return;
7376        }
7377
7378        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7379                getLineCount() == 1 && canMarquee()) {
7380
7381            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7382                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7383                final Layout tmp = mLayout;
7384                mLayout = mSavedMarqueeModeLayout;
7385                mSavedMarqueeModeLayout = tmp;
7386                setHorizontalFadingEdgeEnabled(true);
7387                requestLayout();
7388                invalidate();
7389            }
7390
7391            if (mMarquee == null) mMarquee = new Marquee(this);
7392            mMarquee.start(mMarqueeRepeatLimit);
7393        }
7394    }
7395
7396    private void stopMarquee() {
7397        if (mMarquee != null && !mMarquee.isStopped()) {
7398            mMarquee.stop();
7399        }
7400
7401        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7402            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7403            final Layout tmp = mSavedMarqueeModeLayout;
7404            mSavedMarqueeModeLayout = mLayout;
7405            mLayout = tmp;
7406            setHorizontalFadingEdgeEnabled(false);
7407            requestLayout();
7408            invalidate();
7409        }
7410    }
7411
7412    private void startStopMarquee(boolean start) {
7413        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7414            if (start) {
7415                startMarquee();
7416            } else {
7417                stopMarquee();
7418            }
7419        }
7420    }
7421
7422    private static final class Marquee extends Handler {
7423        // TODO: Add an option to configure this
7424        private static final float MARQUEE_DELTA_MAX = 0.07f;
7425        private static final int MARQUEE_DELAY = 1200;
7426        private static final int MARQUEE_RESTART_DELAY = 1200;
7427        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7428        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7429
7430        private static final byte MARQUEE_STOPPED = 0x0;
7431        private static final byte MARQUEE_STARTING = 0x1;
7432        private static final byte MARQUEE_RUNNING = 0x2;
7433
7434        private static final int MESSAGE_START = 0x1;
7435        private static final int MESSAGE_TICK = 0x2;
7436        private static final int MESSAGE_RESTART = 0x3;
7437
7438        private final WeakReference<TextView> mView;
7439
7440        private byte mStatus = MARQUEE_STOPPED;
7441        private final float mScrollUnit;
7442        private float mMaxScroll;
7443        float mMaxFadeScroll;
7444        private float mGhostStart;
7445        private float mGhostOffset;
7446        private float mFadeStop;
7447        private int mRepeatLimit;
7448
7449        float mScroll;
7450
7451        Marquee(TextView v) {
7452            final float density = v.getContext().getResources().getDisplayMetrics().density;
7453            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7454            mView = new WeakReference<TextView>(v);
7455        }
7456
7457        @Override
7458        public void handleMessage(Message msg) {
7459            switch (msg.what) {
7460                case MESSAGE_START:
7461                    mStatus = MARQUEE_RUNNING;
7462                    tick();
7463                    break;
7464                case MESSAGE_TICK:
7465                    tick();
7466                    break;
7467                case MESSAGE_RESTART:
7468                    if (mStatus == MARQUEE_RUNNING) {
7469                        if (mRepeatLimit >= 0) {
7470                            mRepeatLimit--;
7471                        }
7472                        start(mRepeatLimit);
7473                    }
7474                    break;
7475            }
7476        }
7477
7478        void tick() {
7479            if (mStatus != MARQUEE_RUNNING) {
7480                return;
7481            }
7482
7483            removeMessages(MESSAGE_TICK);
7484
7485            final TextView textView = mView.get();
7486            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7487                mScroll += mScrollUnit;
7488                if (mScroll > mMaxScroll) {
7489                    mScroll = mMaxScroll;
7490                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7491                } else {
7492                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7493                }
7494                textView.invalidate();
7495            }
7496        }
7497
7498        void stop() {
7499            mStatus = MARQUEE_STOPPED;
7500            removeMessages(MESSAGE_START);
7501            removeMessages(MESSAGE_RESTART);
7502            removeMessages(MESSAGE_TICK);
7503            resetScroll();
7504        }
7505
7506        private void resetScroll() {
7507            mScroll = 0.0f;
7508            final TextView textView = mView.get();
7509            if (textView != null) textView.invalidate();
7510        }
7511
7512        void start(int repeatLimit) {
7513            if (repeatLimit == 0) {
7514                stop();
7515                return;
7516            }
7517            mRepeatLimit = repeatLimit;
7518            final TextView textView = mView.get();
7519            if (textView != null && textView.mLayout != null) {
7520                mStatus = MARQUEE_STARTING;
7521                mScroll = 0.0f;
7522                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7523                        textView.getCompoundPaddingRight();
7524                final float lineWidth = textView.mLayout.getLineWidth(0);
7525                final float gap = textWidth / 3.0f;
7526                mGhostStart = lineWidth - textWidth + gap;
7527                mMaxScroll = mGhostStart + textWidth;
7528                mGhostOffset = lineWidth + gap;
7529                mFadeStop = lineWidth + textWidth / 6.0f;
7530                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7531
7532                textView.invalidate();
7533                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7534            }
7535        }
7536
7537        float getGhostOffset() {
7538            return mGhostOffset;
7539        }
7540
7541        boolean shouldDrawLeftFade() {
7542            return mScroll <= mFadeStop;
7543        }
7544
7545        boolean shouldDrawGhost() {
7546            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7547        }
7548
7549        boolean isRunning() {
7550            return mStatus == MARQUEE_RUNNING;
7551        }
7552
7553        boolean isStopped() {
7554            return mStatus == MARQUEE_STOPPED;
7555        }
7556    }
7557
7558    /**
7559     * This method is called when the text is changed, in case any subclasses
7560     * would like to know.
7561     *
7562     * Within <code>text</code>, the <code>lengthAfter</code> characters
7563     * beginning at <code>start</code> have just replaced old text that had
7564     * length <code>lengthBefore</code>. It is an error to attempt to make
7565     * changes to <code>text</code> from this callback.
7566     *
7567     * @param text The text the TextView is displaying
7568     * @param start The offset of the start of the range of the text that was
7569     * modified
7570     * @param lengthBefore The length of the former text that has been replaced
7571     * @param lengthAfter The length of the replacement modified text
7572     */
7573    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7574        // intentionally empty, template pattern method can be overridden by subclasses
7575    }
7576
7577    /**
7578     * This method is called when the selection has changed, in case any
7579     * subclasses would like to know.
7580     *
7581     * @param selStart The new selection start location.
7582     * @param selEnd The new selection end location.
7583     */
7584    protected void onSelectionChanged(int selStart, int selEnd) {
7585        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7586        mTextDisplayListIsValid = false;
7587    }
7588
7589    /**
7590     * Adds a TextWatcher to the list of those whose methods are called
7591     * whenever this TextView's text changes.
7592     * <p>
7593     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7594     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7595     * if there are any text changed listeners forces the buffer type to
7596     * Editable if it would not otherwise be and does call this method.
7597     */
7598    public void addTextChangedListener(TextWatcher watcher) {
7599        if (mListeners == null) {
7600            mListeners = new ArrayList<TextWatcher>();
7601        }
7602
7603        mListeners.add(watcher);
7604    }
7605
7606    /**
7607     * Removes the specified TextWatcher from the list of those whose
7608     * methods are called
7609     * whenever this TextView's text changes.
7610     */
7611    public void removeTextChangedListener(TextWatcher watcher) {
7612        if (mListeners != null) {
7613            int i = mListeners.indexOf(watcher);
7614
7615            if (i >= 0) {
7616                mListeners.remove(i);
7617            }
7618        }
7619    }
7620
7621    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7622        if (mListeners != null) {
7623            final ArrayList<TextWatcher> list = mListeners;
7624            final int count = list.size();
7625            for (int i = 0; i < count; i++) {
7626                list.get(i).beforeTextChanged(text, start, before, after);
7627            }
7628        }
7629
7630        // The spans that are inside or intersect the modified region no longer make sense
7631        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7632        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7633    }
7634
7635    // Removes all spans that are inside or actually overlap the start..end range
7636    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7637        if (!(mText instanceof Editable)) return;
7638        Editable text = (Editable) mText;
7639
7640        T[] spans = text.getSpans(start, end, type);
7641        final int length = spans.length;
7642        for (int i = 0; i < length; i++) {
7643            final int s = text.getSpanStart(spans[i]);
7644            final int e = text.getSpanEnd(spans[i]);
7645            // Spans that are adjacent to the edited region will be handled in
7646            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7647            if (e == start || s == end) break;
7648            text.removeSpan(spans[i]);
7649        }
7650    }
7651
7652    /**
7653     * Not private so it can be called from an inner class without going
7654     * through a thunk.
7655     */
7656    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7657        if (mListeners != null) {
7658            final ArrayList<TextWatcher> list = mListeners;
7659            final int count = list.size();
7660            for (int i = 0; i < count; i++) {
7661                list.get(i).onTextChanged(text, start, before, after);
7662            }
7663        }
7664
7665        updateSpellCheckSpans(start, start + after, false);
7666        mTextDisplayListIsValid = false;
7667
7668        // Hide the controllers as soon as text is modified (typing, procedural...)
7669        // We do not hide the span controllers, since they can be added when a new text is
7670        // inserted into the text view (voice IME).
7671        hideCursorControllers();
7672    }
7673
7674    /**
7675     * Not private so it can be called from an inner class without going
7676     * through a thunk.
7677     */
7678    void sendAfterTextChanged(Editable text) {
7679        if (mListeners != null) {
7680            final ArrayList<TextWatcher> list = mListeners;
7681            final int count = list.size();
7682            for (int i = 0; i < count; i++) {
7683                list.get(i).afterTextChanged(text);
7684            }
7685        }
7686    }
7687
7688    /**
7689     * Not private so it can be called from an inner class without going
7690     * through a thunk.
7691     */
7692    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7693        final InputMethodState ims = mInputMethodState;
7694        if (ims == null || ims.mBatchEditNesting == 0) {
7695            updateAfterEdit();
7696        }
7697        if (ims != null) {
7698            ims.mContentChanged = true;
7699            if (ims.mChangedStart < 0) {
7700                ims.mChangedStart = start;
7701                ims.mChangedEnd = start+before;
7702            } else {
7703                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7704                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7705            }
7706            ims.mChangedDelta += after-before;
7707        }
7708
7709        sendOnTextChanged(buffer, start, before, after);
7710        onTextChanged(buffer, start, before, after);
7711    }
7712
7713    /**
7714     * Not private so it can be called from an inner class without going
7715     * through a thunk.
7716     */
7717    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7718        // XXX Make the start and end move together if this ends up
7719        // spending too much time invalidating.
7720
7721        boolean selChanged = false;
7722        int newSelStart=-1, newSelEnd=-1;
7723
7724        final InputMethodState ims = mInputMethodState;
7725
7726        if (what == Selection.SELECTION_END) {
7727            mHighlightPathBogus = true;
7728            selChanged = true;
7729            newSelEnd = newStart;
7730
7731            if (!isFocused()) {
7732                mSelectionMoved = true;
7733            }
7734
7735            if (oldStart >= 0 || newStart >= 0) {
7736                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7737                registerForPreDraw();
7738                makeBlink();
7739            }
7740        }
7741
7742        if (what == Selection.SELECTION_START) {
7743            mHighlightPathBogus = true;
7744            selChanged = true;
7745            newSelStart = newStart;
7746
7747            if (!isFocused()) {
7748                mSelectionMoved = true;
7749            }
7750
7751            if (oldStart >= 0 || newStart >= 0) {
7752                int end = Selection.getSelectionEnd(buf);
7753                invalidateCursor(end, oldStart, newStart);
7754            }
7755        }
7756
7757        if (selChanged) {
7758            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7759                if (newSelStart < 0) {
7760                    newSelStart = Selection.getSelectionStart(buf);
7761                }
7762                if (newSelEnd < 0) {
7763                    newSelEnd = Selection.getSelectionEnd(buf);
7764                }
7765                onSelectionChanged(newSelStart, newSelEnd);
7766            }
7767        }
7768
7769        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle ||
7770                what instanceof CharacterStyle) {
7771            if (ims == null || ims.mBatchEditNesting == 0) {
7772                invalidate();
7773                mHighlightPathBogus = true;
7774                checkForResize();
7775            } else {
7776                ims.mContentChanged = true;
7777            }
7778            mTextDisplayListIsValid = false;
7779        }
7780
7781        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7782            mHighlightPathBogus = true;
7783            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7784                ims.mSelectionModeChanged = true;
7785            }
7786
7787            if (Selection.getSelectionStart(buf) >= 0) {
7788                if (ims == null || ims.mBatchEditNesting == 0) {
7789                    invalidateCursor();
7790                } else {
7791                    ims.mCursorChanged = true;
7792                }
7793            }
7794        }
7795
7796        if (what instanceof ParcelableSpan) {
7797            // If this is a span that can be sent to a remote process,
7798            // the current extract editor would be interested in it.
7799            if (ims != null && ims.mExtracting != null) {
7800                if (ims.mBatchEditNesting != 0) {
7801                    if (oldStart >= 0) {
7802                        if (ims.mChangedStart > oldStart) {
7803                            ims.mChangedStart = oldStart;
7804                        }
7805                        if (ims.mChangedStart > oldEnd) {
7806                            ims.mChangedStart = oldEnd;
7807                        }
7808                    }
7809                    if (newStart >= 0) {
7810                        if (ims.mChangedStart > newStart) {
7811                            ims.mChangedStart = newStart;
7812                        }
7813                        if (ims.mChangedStart > newEnd) {
7814                            ims.mChangedStart = newEnd;
7815                        }
7816                    }
7817                } else {
7818                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7819                            + oldStart + "-" + oldEnd + ","
7820                            + newStart + "-" + newEnd + what);
7821                    ims.mContentChanged = true;
7822                }
7823            }
7824        }
7825
7826        if (mSpellChecker != null && newStart < 0 && what instanceof SpellCheckSpan) {
7827            mSpellChecker.removeSpellCheckSpan((SpellCheckSpan) what);
7828        }
7829    }
7830
7831    /**
7832     * Create new SpellCheckSpans on the modified region.
7833     */
7834    private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) {
7835        if (isTextEditable() && isSuggestionsEnabled() && !(this instanceof ExtractEditText)) {
7836            if (mSpellChecker == null && createSpellChecker) {
7837                mSpellChecker = new SpellChecker(this);
7838            }
7839            if (mSpellChecker != null) {
7840                mSpellChecker.spellCheck(start, end);
7841            }
7842        }
7843    }
7844
7845    /**
7846     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7847     * pop-up should be displayed.
7848     */
7849    private class EasyEditSpanController {
7850
7851        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7852
7853        private EasyEditPopupWindow mPopupWindow;
7854
7855        private EasyEditSpan mEasyEditSpan;
7856
7857        private Runnable mHidePopup;
7858
7859        private void hide() {
7860            if (mPopupWindow != null) {
7861                mPopupWindow.hide();
7862                TextView.this.removeCallbacks(mHidePopup);
7863            }
7864            removeSpans(mText);
7865            mEasyEditSpan = null;
7866        }
7867
7868        /**
7869         * Monitors the changes in the text.
7870         *
7871         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7872         * as the notifications are not sent when a spannable (with spans) is inserted.
7873         */
7874        public void onTextChange(CharSequence buffer) {
7875            adjustSpans(mText);
7876
7877            if (getWindowVisibility() != View.VISIBLE) {
7878                // The window is not visible yet, ignore the text change.
7879                return;
7880            }
7881
7882            if (mLayout == null) {
7883                // The view has not been layout yet, ignore the text change
7884                return;
7885            }
7886
7887            InputMethodManager imm = InputMethodManager.peekInstance();
7888            if (!(TextView.this instanceof ExtractEditText)
7889                    && imm != null && imm.isFullscreenMode()) {
7890                // The input is in extract mode. We do not have to handle the easy edit in the
7891                // original TextView, as the ExtractEditText will do
7892                return;
7893            }
7894
7895            // Remove the current easy edit span, as the text changed, and remove the pop-up
7896            // (if any)
7897            if (mEasyEditSpan != null) {
7898                if (mText instanceof Spannable) {
7899                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7900                }
7901                mEasyEditSpan = null;
7902            }
7903            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7904                mPopupWindow.hide();
7905            }
7906
7907            // Display the new easy edit span (if any).
7908            if (buffer instanceof Spanned) {
7909                mEasyEditSpan = getSpan((Spanned) buffer);
7910                if (mEasyEditSpan != null) {
7911                    if (mPopupWindow == null) {
7912                        mPopupWindow = new EasyEditPopupWindow();
7913                        mHidePopup = new Runnable() {
7914                            @Override
7915                            public void run() {
7916                                hide();
7917                            }
7918                        };
7919                    }
7920                    mPopupWindow.show(mEasyEditSpan);
7921                    TextView.this.removeCallbacks(mHidePopup);
7922                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7923                }
7924            }
7925        }
7926
7927        /**
7928         * Adjusts the spans by removing all of them except the last one.
7929         */
7930        private void adjustSpans(CharSequence buffer) {
7931            // This method enforces that only one easy edit span is attached to the text.
7932            // A better way to enforce this would be to listen for onSpanAdded, but this method
7933            // cannot be used in this scenario as no notification is triggered when a text with
7934            // spans is inserted into a text.
7935            if (buffer instanceof Spannable) {
7936                Spannable spannable = (Spannable) buffer;
7937                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7938                        EasyEditSpan.class);
7939                for (int i = 0; i < spans.length - 1; i++) {
7940                    spannable.removeSpan(spans[i]);
7941                }
7942            }
7943        }
7944
7945        /**
7946         * Removes all the {@link EasyEditSpan} currently attached.
7947         */
7948        private void removeSpans(CharSequence buffer) {
7949            if (buffer instanceof Spannable) {
7950                Spannable spannable = (Spannable) buffer;
7951                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7952                        EasyEditSpan.class);
7953                for (int i = 0; i < spans.length; i++) {
7954                    spannable.removeSpan(spans[i]);
7955                }
7956            }
7957        }
7958
7959        private EasyEditSpan getSpan(Spanned spanned) {
7960            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7961                    EasyEditSpan.class);
7962            if (easyEditSpans.length == 0) {
7963                return null;
7964            } else {
7965                return easyEditSpans[0];
7966            }
7967        }
7968    }
7969
7970    /**
7971     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7972     * by {@link EasyEditSpanController}.
7973     */
7974    private class EasyEditPopupWindow extends PinnedPopupWindow
7975            implements OnClickListener {
7976        private static final int POPUP_TEXT_LAYOUT =
7977                com.android.internal.R.layout.text_edit_action_popup_text;
7978        private TextView mDeleteTextView;
7979        private EasyEditSpan mEasyEditSpan;
7980
7981        @Override
7982        protected void createPopupWindow() {
7983            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7984                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7985            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7986            mPopupWindow.setClippingEnabled(true);
7987        }
7988
7989        @Override
7990        protected void initContentView() {
7991            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7992            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7993            mContentView = linearLayout;
7994            mContentView.setBackgroundResource(
7995                    com.android.internal.R.drawable.text_edit_side_paste_window);
7996
7997            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7998                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7999
8000            LayoutParams wrapContent = new LayoutParams(
8001                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
8002
8003            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
8004            mDeleteTextView.setLayoutParams(wrapContent);
8005            mDeleteTextView.setText(com.android.internal.R.string.delete);
8006            mDeleteTextView.setOnClickListener(this);
8007            mContentView.addView(mDeleteTextView);
8008        }
8009
8010        public void show(EasyEditSpan easyEditSpan) {
8011            mEasyEditSpan = easyEditSpan;
8012            super.show();
8013        }
8014
8015        @Override
8016        public void onClick(View view) {
8017            if (view == mDeleteTextView) {
8018                Editable editable = (Editable) mText;
8019                int start = editable.getSpanStart(mEasyEditSpan);
8020                int end = editable.getSpanEnd(mEasyEditSpan);
8021                if (start >= 0 && end >= 0) {
8022                    deleteText_internal(start, end);
8023                }
8024            }
8025        }
8026
8027        @Override
8028        protected int getTextOffset() {
8029            // Place the pop-up at the end of the span
8030            Editable editable = (Editable) mText;
8031            return editable.getSpanEnd(mEasyEditSpan);
8032        }
8033
8034        @Override
8035        protected int getVerticalLocalPosition(int line) {
8036            return mLayout.getLineBottom(line);
8037        }
8038
8039        @Override
8040        protected int clipVertically(int positionY) {
8041            // As we display the pop-up below the span, no vertical clipping is required.
8042            return positionY;
8043        }
8044    }
8045
8046    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8047
8048        private CharSequence mBeforeText;
8049
8050        private EasyEditSpanController mEasyEditSpanController;
8051
8052        private ChangeWatcher() {
8053            mEasyEditSpanController = new EasyEditSpanController();
8054        }
8055
8056        public void beforeTextChanged(CharSequence buffer, int start,
8057                                      int before, int after) {
8058            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8059                    + " before=" + before + " after=" + after + ": " + buffer);
8060
8061            if (AccessibilityManager.getInstance(mContext).isEnabled()
8062                    && !isPasswordInputType(mInputType)
8063                    && !hasPasswordTransformationMethod()) {
8064                mBeforeText = buffer.toString();
8065            }
8066
8067            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8068        }
8069
8070        public void onTextChanged(CharSequence buffer, int start,
8071                                  int before, int after) {
8072            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8073                    + " before=" + before + " after=" + after + ": " + buffer);
8074            TextView.this.handleTextChanged(buffer, start, before, after);
8075
8076            mEasyEditSpanController.onTextChange(buffer);
8077
8078            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8079                    (isFocused() || isSelected() && isShown())) {
8080                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8081                mBeforeText = null;
8082            }
8083        }
8084
8085        public void afterTextChanged(Editable buffer) {
8086            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8087            TextView.this.sendAfterTextChanged(buffer);
8088
8089            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8090                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8091            }
8092        }
8093
8094        public void onSpanChanged(Spannable buf,
8095                                  Object what, int s, int e, int st, int en) {
8096            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8097                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8098            TextView.this.spanChange(buf, what, s, st, e, en);
8099        }
8100
8101        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8102            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8103                    + " what=" + what + ": " + buf);
8104            TextView.this.spanChange(buf, what, -1, s, -1, e);
8105        }
8106
8107        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8108            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8109                    + " what=" + what + ": " + buf);
8110            TextView.this.spanChange(buf, what, s, -1, e, -1);
8111        }
8112
8113        private void hideControllers() {
8114            mEasyEditSpanController.hide();
8115        }
8116    }
8117
8118    /**
8119     * @hide
8120     */
8121    @Override
8122    public void dispatchFinishTemporaryDetach() {
8123        mDispatchTemporaryDetach = true;
8124        super.dispatchFinishTemporaryDetach();
8125        mDispatchTemporaryDetach = false;
8126    }
8127
8128    @Override
8129    public void onStartTemporaryDetach() {
8130        super.onStartTemporaryDetach();
8131        // Only track when onStartTemporaryDetach() is called directly,
8132        // usually because this instance is an editable field in a list
8133        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8134
8135        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8136        // selection becomes visible again. Until a better solution is found, stop text selection
8137        // mode (if any) as soon as this TextView is recycled.
8138        hideControllers();
8139    }
8140
8141    @Override
8142    public void onFinishTemporaryDetach() {
8143        super.onFinishTemporaryDetach();
8144        // Only track when onStartTemporaryDetach() is called directly,
8145        // usually because this instance is an editable field in a list
8146        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8147    }
8148
8149    @Override
8150    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8151        if (mTemporaryDetach) {
8152            // If we are temporarily in the detach state, then do nothing.
8153            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8154            return;
8155        }
8156
8157        mShowCursor = SystemClock.uptimeMillis();
8158
8159        ensureEndedBatchEdit();
8160
8161        if (focused) {
8162            int selStart = getSelectionStart();
8163            int selEnd = getSelectionEnd();
8164
8165            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8166            // mode for these, unless there was a specific selection already started.
8167            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8168                    selEnd == mText.length();
8169            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8170
8171            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8172                // If a tap was used to give focus to that view, move cursor at tap position.
8173                // Has to be done before onTakeFocus, which can be overloaded.
8174                final int lastTapPosition = getLastTapPosition();
8175                if (lastTapPosition >= 0) {
8176                    Selection.setSelection((Spannable) mText, lastTapPosition);
8177                }
8178
8179                if (mMovement != null) {
8180                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8181                }
8182
8183                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8184                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8185                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8186                // This special case ensure that we keep current selection in that case.
8187                // It would be better to know why the DecorView does not have focus at that time.
8188                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8189                        selStart >= 0 && selEnd >= 0) {
8190                    /*
8191                     * Someone intentionally set the selection, so let them
8192                     * do whatever it is that they wanted to do instead of
8193                     * the default on-focus behavior.  We reset the selection
8194                     * here instead of just skipping the onTakeFocus() call
8195                     * because some movement methods do something other than
8196                     * just setting the selection in theirs and we still
8197                     * need to go through that path.
8198                     */
8199                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8200                }
8201
8202                if (mSelectAllOnFocus) {
8203                    selectAll();
8204                }
8205
8206                mTouchFocusSelected = true;
8207            }
8208
8209            mFrozenWithFocus = false;
8210            mSelectionMoved = false;
8211
8212            if (mText instanceof Spannable) {
8213                Spannable sp = (Spannable) mText;
8214                MetaKeyKeyListener.resetMetaState(sp);
8215            }
8216
8217            makeBlink();
8218
8219            if (mError != null) {
8220                showError();
8221            }
8222        } else {
8223            if (mError != null) {
8224                hideError();
8225            }
8226            // Don't leave us in the middle of a batch edit.
8227            onEndBatchEdit();
8228
8229            if (this instanceof ExtractEditText) {
8230                // terminateTextSelectionMode removes selection, which we want to keep when
8231                // ExtractEditText goes out of focus.
8232                final int selStart = getSelectionStart();
8233                final int selEnd = getSelectionEnd();
8234                hideControllers();
8235                Selection.setSelection((Spannable) mText, selStart, selEnd);
8236            } else {
8237                hideControllers();
8238                downgradeEasyCorrectionSpans();
8239            }
8240
8241            // No need to create the controller
8242            if (mSelectionModifierCursorController != null) {
8243                mSelectionModifierCursorController.resetTouchOffsets();
8244            }
8245        }
8246
8247        startStopMarquee(focused);
8248
8249        if (mTransformation != null) {
8250            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8251        }
8252
8253        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8254    }
8255
8256    private int getLastTapPosition() {
8257        // No need to create the controller at that point, no last tap position saved
8258        if (mSelectionModifierCursorController != null) {
8259            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8260            if (lastTapPosition >= 0) {
8261                // Safety check, should not be possible.
8262                if (lastTapPosition > mText.length()) {
8263                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8264                            + mText.length() + ")");
8265                    lastTapPosition = mText.length();
8266                }
8267                return lastTapPosition;
8268            }
8269        }
8270
8271        return -1;
8272    }
8273
8274    @Override
8275    public void onWindowFocusChanged(boolean hasWindowFocus) {
8276        super.onWindowFocusChanged(hasWindowFocus);
8277
8278        if (hasWindowFocus) {
8279            if (mBlink != null) {
8280                mBlink.uncancel();
8281                makeBlink();
8282            }
8283        } else {
8284            if (mBlink != null) {
8285                mBlink.cancel();
8286            }
8287            // Don't leave us in the middle of a batch edit.
8288            onEndBatchEdit();
8289            if (mInputContentType != null) {
8290                mInputContentType.enterDown = false;
8291            }
8292
8293            hideControllers();
8294            if (mSuggestionsPopupWindow != null) {
8295                mSuggestionsPopupWindow.onParentLostFocus();
8296            }
8297        }
8298
8299        startStopMarquee(hasWindowFocus);
8300    }
8301
8302    @Override
8303    protected void onVisibilityChanged(View changedView, int visibility) {
8304        super.onVisibilityChanged(changedView, visibility);
8305        if (visibility != VISIBLE) {
8306            hideControllers();
8307        }
8308    }
8309
8310    /**
8311     * Use {@link BaseInputConnection#removeComposingSpans
8312     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8313     * state from this text view.
8314     */
8315    public void clearComposingText() {
8316        if (mText instanceof Spannable) {
8317            BaseInputConnection.removeComposingSpans((Spannable)mText);
8318        }
8319    }
8320
8321    @Override
8322    public void setSelected(boolean selected) {
8323        boolean wasSelected = isSelected();
8324
8325        super.setSelected(selected);
8326
8327        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8328            if (selected) {
8329                startMarquee();
8330            } else {
8331                stopMarquee();
8332            }
8333        }
8334    }
8335
8336    @Override
8337    public boolean onTouchEvent(MotionEvent event) {
8338        final int action = event.getActionMasked();
8339
8340        if (hasSelectionController()) {
8341            getSelectionController().onTouchEvent(event);
8342        }
8343
8344        if (mShowSuggestionRunnable != null) {
8345            removeCallbacks(mShowSuggestionRunnable);
8346        }
8347
8348        if (action == MotionEvent.ACTION_DOWN) {
8349            mLastDownPositionX = event.getX();
8350            mLastDownPositionY = event.getY();
8351
8352            // Reset this state; it will be re-set if super.onTouchEvent
8353            // causes focus to move to the view.
8354            mTouchFocusSelected = false;
8355            mIgnoreActionUpEvent = false;
8356        }
8357
8358        final boolean superResult = super.onTouchEvent(event);
8359
8360        /*
8361         * Don't handle the release after a long press, because it will
8362         * move the selection away from whatever the menu action was
8363         * trying to affect.
8364         */
8365        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8366            mDiscardNextActionUp = false;
8367            return superResult;
8368        }
8369
8370        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8371                !mIgnoreActionUpEvent && isFocused();
8372
8373         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8374                && mText instanceof Spannable && mLayout != null) {
8375            boolean handled = false;
8376
8377            if (mMovement != null) {
8378                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8379            }
8380
8381            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8382                // The LinkMovementMethod which should handle taps on links has not been installed
8383                // on non editable text that support text selection.
8384                // We reproduce its behavior here to open links for these.
8385                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8386                        getSelectionEnd(), ClickableSpan.class);
8387
8388                if (links.length > 0) {
8389                    links[0].onClick(this);
8390                    handled = true;
8391                }
8392            }
8393
8394            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8395                // Show the IME, except when selecting in read-only text.
8396                final InputMethodManager imm = InputMethodManager.peekInstance();
8397                viewClicked(imm);
8398                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8399                    handled |= imm != null && imm.showSoftInput(this, 0);
8400                }
8401
8402                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8403                hideControllers();
8404                if (!selectAllGotFocus && mText.length() > 0) {
8405                    // Move cursor
8406                    final int offset = getOffsetForPosition(event.getX(), event.getY());
8407                    Selection.setSelection((Spannable) mText, offset);
8408                    if (mSpellChecker != null) {
8409                        // When the cursor moves, the word that was typed may need spell check
8410                        mSpellChecker.onSelectionChanged();
8411                    }
8412                    if (!extractedTextModeWillBeStarted()) {
8413                        if (isCursorInsideEasyCorrectionSpan()) {
8414                            if (mShowSuggestionRunnable == null) {
8415                                mShowSuggestionRunnable = new Runnable() {
8416                                    public void run() {
8417                                        showSuggestions();
8418                                    }
8419                                };
8420                            }
8421                            postDelayed(mShowSuggestionRunnable,
8422                                    ViewConfiguration.getDoubleTapTimeout());
8423                        } else if (hasInsertionController()) {
8424                            getInsertionController().show();
8425                        }
8426                    }
8427                }
8428
8429                handled = true;
8430            }
8431
8432            if (handled) {
8433                return true;
8434            }
8435        }
8436
8437        return superResult;
8438    }
8439
8440    /**
8441     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8442     */
8443    private boolean isCursorInsideSuggestionSpan() {
8444        if (!(mText instanceof Spannable)) return false;
8445
8446        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8447                getSelectionEnd(), SuggestionSpan.class);
8448        return (suggestionSpans.length > 0);
8449    }
8450
8451    /**
8452     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8453     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8454     */
8455    private boolean isCursorInsideEasyCorrectionSpan() {
8456        Spannable spannable = (Spannable) mText;
8457        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8458                getSelectionEnd(), SuggestionSpan.class);
8459        for (int i = 0; i < suggestionSpans.length; i++) {
8460            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8461                return true;
8462            }
8463        }
8464        return false;
8465    }
8466
8467    /**
8468     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8469     * span.
8470     */
8471    private void downgradeEasyCorrectionSpans() {
8472        if (mText instanceof Spannable) {
8473            Spannable spannable = (Spannable) mText;
8474            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8475                    spannable.length(), SuggestionSpan.class);
8476            for (int i = 0; i < suggestionSpans.length; i++) {
8477                int flags = suggestionSpans[i].getFlags();
8478                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8479                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8480                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8481                    suggestionSpans[i].setFlags(flags);
8482                }
8483            }
8484        }
8485    }
8486
8487    @Override
8488    public boolean onGenericMotionEvent(MotionEvent event) {
8489        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8490            try {
8491                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8492                    return true;
8493                }
8494            } catch (AbstractMethodError ex) {
8495                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8496                // Ignore its absence in case third party applications implemented the
8497                // interface directly.
8498            }
8499        }
8500        return super.onGenericMotionEvent(event);
8501    }
8502
8503    private void prepareCursorControllers() {
8504        boolean windowSupportsHandles = false;
8505
8506        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8507        if (params instanceof WindowManager.LayoutParams) {
8508            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8509            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8510                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8511        }
8512
8513        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8514        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8515                mLayout != null;
8516
8517        if (!mInsertionControllerEnabled) {
8518            hideInsertionPointCursorController();
8519            if (mInsertionPointCursorController != null) {
8520                mInsertionPointCursorController.onDetached();
8521                mInsertionPointCursorController = null;
8522            }
8523        }
8524
8525        if (!mSelectionControllerEnabled) {
8526            stopSelectionActionMode();
8527            if (mSelectionModifierCursorController != null) {
8528                mSelectionModifierCursorController.onDetached();
8529                mSelectionModifierCursorController = null;
8530            }
8531        }
8532    }
8533
8534    /**
8535     * @return True iff this TextView contains a text that can be edited, or if this is
8536     * a selectable TextView.
8537     */
8538    private boolean isTextEditable() {
8539        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8540    }
8541
8542    /**
8543     * Returns true, only while processing a touch gesture, if the initial
8544     * touch down event caused focus to move to the text view and as a result
8545     * its selection changed.  Only valid while processing the touch gesture
8546     * of interest.
8547     */
8548    public boolean didTouchFocusSelect() {
8549        return mTouchFocusSelected;
8550    }
8551
8552    @Override
8553    public void cancelLongPress() {
8554        super.cancelLongPress();
8555        mIgnoreActionUpEvent = true;
8556    }
8557
8558    @Override
8559    public boolean onTrackballEvent(MotionEvent event) {
8560        if (mMovement != null && mText instanceof Spannable &&
8561            mLayout != null) {
8562            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8563                return true;
8564            }
8565        }
8566
8567        return super.onTrackballEvent(event);
8568    }
8569
8570    public void setScroller(Scroller s) {
8571        mScroller = s;
8572    }
8573
8574    private static class Blink extends Handler implements Runnable {
8575        private final WeakReference<TextView> mView;
8576        private boolean mCancelled;
8577
8578        public Blink(TextView v) {
8579            mView = new WeakReference<TextView>(v);
8580        }
8581
8582        public void run() {
8583            if (mCancelled) {
8584                return;
8585            }
8586
8587            removeCallbacks(Blink.this);
8588
8589            TextView tv = mView.get();
8590
8591            if (tv != null && tv.shouldBlink()) {
8592                if (tv.mLayout != null) {
8593                    tv.invalidateCursorPath();
8594                }
8595
8596                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8597            }
8598        }
8599
8600        void cancel() {
8601            if (!mCancelled) {
8602                removeCallbacks(Blink.this);
8603                mCancelled = true;
8604            }
8605        }
8606
8607        void uncancel() {
8608            mCancelled = false;
8609        }
8610    }
8611
8612    /**
8613     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8614     */
8615    private boolean shouldBlink() {
8616        if (!isCursorVisible() || !isFocused()) return false;
8617
8618        final int start = getSelectionStart();
8619        if (start < 0) return false;
8620
8621        final int end = getSelectionEnd();
8622        if (end < 0) return false;
8623
8624        return start == end;
8625    }
8626
8627    private void makeBlink() {
8628        if (shouldBlink()) {
8629            mShowCursor = SystemClock.uptimeMillis();
8630            if (mBlink == null) mBlink = new Blink(this);
8631            mBlink.removeCallbacks(mBlink);
8632            mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8633        } else {
8634            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8635        }
8636    }
8637
8638    @Override
8639    protected float getLeftFadingEdgeStrength() {
8640        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8641        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8642                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8643            if (mMarquee != null && !mMarquee.isStopped()) {
8644                final Marquee marquee = mMarquee;
8645                if (marquee.shouldDrawLeftFade()) {
8646                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8647                } else {
8648                    return 0.0f;
8649                }
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                        return 0.0f;
8656                    case Gravity.RIGHT:
8657                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8658                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8659                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8660                    case Gravity.CENTER_HORIZONTAL:
8661                        return 0.0f;
8662                }
8663            }
8664        }
8665        return super.getLeftFadingEdgeStrength();
8666    }
8667
8668    @Override
8669    protected float getRightFadingEdgeStrength() {
8670        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8671        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8672                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8673            if (mMarquee != null && !mMarquee.isStopped()) {
8674                final Marquee marquee = mMarquee;
8675                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8676            } else if (getLineCount() == 1) {
8677                final int layoutDirection = getResolvedLayoutDirection();
8678                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8679                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8680                    case Gravity.LEFT:
8681                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8682                                getCompoundPaddingRight();
8683                        final float lineWidth = mLayout.getLineWidth(0);
8684                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8685                    case Gravity.RIGHT:
8686                        return 0.0f;
8687                    case Gravity.CENTER_HORIZONTAL:
8688                    case Gravity.FILL_HORIZONTAL:
8689                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8690                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8691                                getHorizontalFadingEdgeLength();
8692                }
8693            }
8694        }
8695        return super.getRightFadingEdgeStrength();
8696    }
8697
8698    @Override
8699    protected int computeHorizontalScrollRange() {
8700        if (mLayout != null) {
8701            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8702                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8703        }
8704
8705        return super.computeHorizontalScrollRange();
8706    }
8707
8708    @Override
8709    protected int computeVerticalScrollRange() {
8710        if (mLayout != null)
8711            return mLayout.getHeight();
8712
8713        return super.computeVerticalScrollRange();
8714    }
8715
8716    @Override
8717    protected int computeVerticalScrollExtent() {
8718        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8719    }
8720
8721    @Override
8722    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8723        super.findViewsWithText(outViews, searched, flags);
8724        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8725                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8726            String searchedLowerCase = searched.toString().toLowerCase();
8727            String textLowerCase = mText.toString().toLowerCase();
8728            if (textLowerCase.contains(searchedLowerCase)) {
8729                outViews.add(this);
8730            }
8731        }
8732    }
8733
8734    public enum BufferType {
8735        NORMAL, SPANNABLE, EDITABLE,
8736    }
8737
8738    /**
8739     * Returns the TextView_textColor attribute from the
8740     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8741     * from the TextView_textAppearance attribute, if TextView_textColor
8742     * was not set directly.
8743     */
8744    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8745        ColorStateList colors;
8746        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8747                                         TextView_textColor);
8748
8749        if (colors == null) {
8750            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8751                                         TextView_textAppearance, -1);
8752            if (ap != -1) {
8753                TypedArray appearance;
8754                appearance = context.obtainStyledAttributes(ap,
8755                                            com.android.internal.R.styleable.TextAppearance);
8756                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8757                                                  TextAppearance_textColor);
8758                appearance.recycle();
8759            }
8760        }
8761
8762        return colors;
8763    }
8764
8765    /**
8766     * Returns the default color from the TextView_textColor attribute
8767     * from the AttributeSet, if set, or the default color from the
8768     * TextAppearance_textColor from the TextView_textAppearance attribute,
8769     * if TextView_textColor was not set directly.
8770     */
8771    public static int getTextColor(Context context,
8772                                   TypedArray attrs,
8773                                   int def) {
8774        ColorStateList colors = getTextColors(context, attrs);
8775
8776        if (colors == null) {
8777            return def;
8778        } else {
8779            return colors.getDefaultColor();
8780        }
8781    }
8782
8783    @Override
8784    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8785        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8786        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8787            switch (keyCode) {
8788            case KeyEvent.KEYCODE_A:
8789                if (canSelectText()) {
8790                    return onTextContextMenuItem(ID_SELECT_ALL);
8791                }
8792                break;
8793            case KeyEvent.KEYCODE_X:
8794                if (canCut()) {
8795                    return onTextContextMenuItem(ID_CUT);
8796                }
8797                break;
8798            case KeyEvent.KEYCODE_C:
8799                if (canCopy()) {
8800                    return onTextContextMenuItem(ID_COPY);
8801                }
8802                break;
8803            case KeyEvent.KEYCODE_V:
8804                if (canPaste()) {
8805                    return onTextContextMenuItem(ID_PASTE);
8806                }
8807                break;
8808            }
8809        }
8810        return super.onKeyShortcut(keyCode, event);
8811    }
8812
8813    /**
8814     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8815     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8816     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8817     */
8818    private boolean canSelectText() {
8819        return hasSelectionController() && mText.length() != 0;
8820    }
8821
8822    /**
8823     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8824     * The text must be spannable and the movement method must allow for arbitary selection.
8825     *
8826     * See also {@link #canSelectText()}.
8827     */
8828    private boolean textCanBeSelected() {
8829        // prepareCursorController() relies on this method.
8830        // If you change this condition, make sure prepareCursorController is called anywhere
8831        // the value of this condition might be changed.
8832        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8833        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8834    }
8835
8836    private boolean canCut() {
8837        if (hasPasswordTransformationMethod()) {
8838            return false;
8839        }
8840
8841        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8842            return true;
8843        }
8844
8845        return false;
8846    }
8847
8848    private boolean canCopy() {
8849        if (hasPasswordTransformationMethod()) {
8850            return false;
8851        }
8852
8853        if (mText.length() > 0 && hasSelection()) {
8854            return true;
8855        }
8856
8857        return false;
8858    }
8859
8860    private boolean canPaste() {
8861        return (mText instanceof Editable &&
8862                mInput != null &&
8863                getSelectionStart() >= 0 &&
8864                getSelectionEnd() >= 0 &&
8865                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8866                hasPrimaryClip());
8867    }
8868
8869    private static long packRangeInLong(int start, int end) {
8870        return (((long) start) << 32) | end;
8871    }
8872
8873    private static int extractRangeStartFromLong(long range) {
8874        return (int) (range >>> 32);
8875    }
8876
8877    private static int extractRangeEndFromLong(long range) {
8878        return (int) (range & 0x00000000FFFFFFFFL);
8879    }
8880
8881    private boolean selectAll() {
8882        final int length = mText.length();
8883        Selection.setSelection((Spannable) mText, 0, length);
8884        return length > 0;
8885    }
8886
8887    /**
8888     * Adjusts selection to the word under last touch offset.
8889     * Return true if the operation was successfully performed.
8890     */
8891    private boolean selectCurrentWord() {
8892        if (!canSelectText()) {
8893            return false;
8894        }
8895
8896        if (hasPasswordTransformationMethod()) {
8897            // Always select all on a password field.
8898            // Cut/copy menu entries are not available for passwords, but being able to select all
8899            // is however useful to delete or paste to replace the entire content.
8900            return selectAll();
8901        }
8902
8903        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8904        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8905
8906        // Specific text field types: select the entire text for these
8907        if (klass == InputType.TYPE_CLASS_NUMBER ||
8908                klass == InputType.TYPE_CLASS_PHONE ||
8909                klass == InputType.TYPE_CLASS_DATETIME ||
8910                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8911                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8912                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8913                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8914            return selectAll();
8915        }
8916
8917        long lastTouchOffsets = getLastTouchOffsets();
8918        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8919        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8920
8921        // Safety check in case standard touch event handling has been bypassed
8922        if (minOffset < 0 || minOffset >= mText.length()) return false;
8923        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8924
8925        int selectionStart, selectionEnd;
8926
8927        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8928        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8929        if (urlSpans.length >= 1) {
8930            URLSpan urlSpan = urlSpans[0];
8931            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8932            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8933        } else {
8934            final WordIterator wordIterator = getWordIterator();
8935            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8936
8937            selectionStart = wordIterator.getBeginning(minOffset);
8938            selectionEnd = wordIterator.getEnd(maxOffset);
8939
8940            if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE ||
8941                    selectionStart == selectionEnd) {
8942                // Possible when the word iterator does not properly handle the text's language
8943                long range = getCharRange(minOffset);
8944                selectionStart = extractRangeStartFromLong(range);
8945                selectionEnd = extractRangeEndFromLong(range);
8946            }
8947        }
8948
8949        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8950        return selectionEnd > selectionStart;
8951    }
8952
8953    /**
8954     * This is a temporary method. Future versions may support multi-locale text.
8955     *
8956     * @return The locale that should be used for a word iterator and a spell checker
8957     * in this TextView, based on the current spell checker settings,
8958     * the current IME's locale, or the system default locale.
8959     * @hide
8960     */
8961    public Locale getTextServicesLocale() {
8962        Locale locale = Locale.getDefault();
8963        final TextServicesManager textServicesManager = (TextServicesManager)
8964                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8965        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8966        if (subtype != null) {
8967            locale = new Locale(subtype.getLocale());
8968        }
8969        return locale;
8970    }
8971
8972    void onLocaleChanged() {
8973        // Will be re-created on demand in getWordIterator with the proper new locale
8974        mWordIterator = null;
8975    }
8976
8977    /**
8978     * @hide
8979     */
8980    public WordIterator getWordIterator() {
8981        if (mWordIterator == null) {
8982            mWordIterator = new WordIterator(getTextServicesLocale());
8983        }
8984        return mWordIterator;
8985    }
8986
8987    private long getCharRange(int offset) {
8988        final int textLength = mText.length();
8989        if (offset + 1 < textLength) {
8990            final char currentChar = mText.charAt(offset);
8991            final char nextChar = mText.charAt(offset + 1);
8992            if (Character.isSurrogatePair(currentChar, nextChar)) {
8993                return packRangeInLong(offset,  offset + 2);
8994            }
8995        }
8996        if (offset < textLength) {
8997            return packRangeInLong(offset,  offset + 1);
8998        }
8999        if (offset - 2 >= 0) {
9000            final char previousChar = mText.charAt(offset - 1);
9001            final char previousPreviousChar = mText.charAt(offset - 2);
9002            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
9003                return packRangeInLong(offset - 2,  offset);
9004            }
9005        }
9006        if (offset - 1 >= 0) {
9007            return packRangeInLong(offset - 1,  offset);
9008        }
9009        return packRangeInLong(offset,  offset);
9010    }
9011
9012    private long getLastTouchOffsets() {
9013        SelectionModifierCursorController selectionController = getSelectionController();
9014        final int minOffset = selectionController.getMinTouchOffset();
9015        final int maxOffset = selectionController.getMaxTouchOffset();
9016        return packRangeInLong(minOffset, maxOffset);
9017    }
9018
9019    @Override
9020    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
9021        super.onPopulateAccessibilityEvent(event);
9022
9023        final boolean isPassword = hasPasswordTransformationMethod();
9024        if (!isPassword) {
9025            CharSequence text = getTextForAccessibility();
9026            if (!TextUtils.isEmpty(text)) {
9027                event.getText().add(text);
9028            }
9029        }
9030    }
9031
9032    @Override
9033    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
9034        super.onInitializeAccessibilityEvent(event);
9035
9036        event.setClassName(TextView.class.getName());
9037        final boolean isPassword = hasPasswordTransformationMethod();
9038        event.setPassword(isPassword);
9039
9040        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9041            event.setFromIndex(Selection.getSelectionStart(mText));
9042            event.setToIndex(Selection.getSelectionEnd(mText));
9043            event.setItemCount(mText.length());
9044        }
9045    }
9046
9047    @Override
9048    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9049        super.onInitializeAccessibilityNodeInfo(info);
9050
9051        info.setClassName(TextView.class.getName());
9052        final boolean isPassword = hasPasswordTransformationMethod();
9053        info.setPassword(isPassword);
9054
9055        if (!isPassword) {
9056            info.setText(getTextForAccessibility());
9057        }
9058    }
9059
9060    @Override
9061    public void sendAccessibilityEvent(int eventType) {
9062        // Do not send scroll events since first they are not interesting for
9063        // accessibility and second such events a generated too frequently.
9064        // For details see the implementation of bringTextIntoView().
9065        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9066            return;
9067        }
9068        super.sendAccessibilityEvent(eventType);
9069    }
9070
9071    /**
9072     * Gets the text reported for accessibility purposes. It is the
9073     * text if not empty or the hint.
9074     *
9075     * @return The accessibility text.
9076     */
9077    private CharSequence getTextForAccessibility() {
9078        CharSequence text = getText();
9079        if (TextUtils.isEmpty(text)) {
9080            text = getHint();
9081        }
9082        return text;
9083    }
9084
9085    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9086            int fromIndex, int removedCount, int addedCount) {
9087        AccessibilityEvent event =
9088            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9089        event.setFromIndex(fromIndex);
9090        event.setRemovedCount(removedCount);
9091        event.setAddedCount(addedCount);
9092        event.setBeforeText(beforeText);
9093        sendAccessibilityEventUnchecked(event);
9094    }
9095
9096    /**
9097     * Returns whether this text view is a current input method target.  The
9098     * default implementation just checks with {@link InputMethodManager}.
9099     */
9100    public boolean isInputMethodTarget() {
9101        InputMethodManager imm = InputMethodManager.peekInstance();
9102        return imm != null && imm.isActive(this);
9103    }
9104
9105    // Selection context mode
9106    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9107    private static final int ID_CUT = android.R.id.cut;
9108    private static final int ID_COPY = android.R.id.copy;
9109    private static final int ID_PASTE = android.R.id.paste;
9110
9111    /**
9112     * Called when a context menu option for the text view is selected.  Currently
9113     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9114     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9115     *
9116     * @return true if the context menu item action was performed.
9117     */
9118    public boolean onTextContextMenuItem(int id) {
9119        int min = 0;
9120        int max = mText.length();
9121
9122        if (isFocused()) {
9123            final int selStart = getSelectionStart();
9124            final int selEnd = getSelectionEnd();
9125
9126            min = Math.max(0, Math.min(selStart, selEnd));
9127            max = Math.max(0, Math.max(selStart, selEnd));
9128        }
9129
9130        switch (id) {
9131            case ID_SELECT_ALL:
9132                // This does not enter text selection mode. Text is highlighted, so that it can be
9133                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9134                selectAll();
9135                return true;
9136
9137            case ID_PASTE:
9138                paste(min, max);
9139                return true;
9140
9141            case ID_CUT:
9142                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9143                deleteText_internal(min, max);
9144                stopSelectionActionMode();
9145                return true;
9146
9147            case ID_COPY:
9148                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9149                stopSelectionActionMode();
9150                return true;
9151        }
9152        return false;
9153    }
9154
9155    private CharSequence getTransformedText(int start, int end) {
9156        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9157    }
9158
9159    /**
9160     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9161     * by [min, max] when replacing this region by paste.
9162     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9163     * make sure we do not add an extra one from the paste content.
9164     */
9165    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9166        if (paste.length() > 0) {
9167            if (min > 0) {
9168                final char charBefore = mTransformed.charAt(min - 1);
9169                final char charAfter = paste.charAt(0);
9170
9171                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9172                    // Two spaces at beginning of paste: remove one
9173                    final int originalLength = mText.length();
9174                    deleteText_internal(min - 1, min);
9175                    // Due to filters, there is no guarantee that exactly one character was
9176                    // removed: count instead.
9177                    final int delta = mText.length() - originalLength;
9178                    min += delta;
9179                    max += delta;
9180                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9181                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9182                    // No space at beginning of paste: add one
9183                    final int originalLength = mText.length();
9184                    replaceText_internal(min, min, " ");
9185                    // Taking possible filters into account as above.
9186                    final int delta = mText.length() - originalLength;
9187                    min += delta;
9188                    max += delta;
9189                }
9190            }
9191
9192            if (max < mText.length()) {
9193                final char charBefore = paste.charAt(paste.length() - 1);
9194                final char charAfter = mTransformed.charAt(max);
9195
9196                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9197                    // Two spaces at end of paste: remove one
9198                    deleteText_internal(max, max + 1);
9199                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9200                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9201                    // No space at end of paste: add one
9202                    replaceText_internal(max, max, " ");
9203                }
9204            }
9205        }
9206
9207        return packRangeInLong(min, max);
9208    }
9209
9210    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9211        TextView shadowView = (TextView) inflate(mContext,
9212                com.android.internal.R.layout.text_drag_thumbnail, null);
9213
9214        if (shadowView == null) {
9215            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9216        }
9217
9218        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9219            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9220        }
9221        shadowView.setText(text);
9222        shadowView.setTextColor(getTextColors());
9223
9224        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9225        shadowView.setGravity(Gravity.CENTER);
9226
9227        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9228                ViewGroup.LayoutParams.WRAP_CONTENT));
9229
9230        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9231        shadowView.measure(size, size);
9232
9233        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9234        shadowView.invalidate();
9235        return new DragShadowBuilder(shadowView);
9236    }
9237
9238    private static class DragLocalState {
9239        public TextView sourceTextView;
9240        public int start, end;
9241
9242        public DragLocalState(TextView sourceTextView, int start, int end) {
9243            this.sourceTextView = sourceTextView;
9244            this.start = start;
9245            this.end = end;
9246        }
9247    }
9248
9249    @Override
9250    public boolean performLongClick() {
9251        boolean handled = false;
9252        boolean vibrate = true;
9253
9254        if (super.performLongClick()) {
9255            handled = true;
9256        }
9257
9258        // Long press in empty space moves cursor and shows the Paste affordance if available.
9259        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9260                mInsertionControllerEnabled) {
9261            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9262            stopSelectionActionMode();
9263            Selection.setSelection((Spannable) mText, offset);
9264            getInsertionController().showWithActionPopup();
9265            handled = true;
9266            vibrate = false;
9267        }
9268
9269        if (!handled && mSelectionActionMode != null) {
9270            if (touchPositionIsInSelection()) {
9271                // Start a drag
9272                final int start = getSelectionStart();
9273                final int end = getSelectionEnd();
9274                CharSequence selectedText = getTransformedText(start, end);
9275                ClipData data = ClipData.newPlainText(null, selectedText);
9276                DragLocalState localState = new DragLocalState(this, start, end);
9277                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9278                stopSelectionActionMode();
9279            } else {
9280                getSelectionController().hide();
9281                selectCurrentWord();
9282                getSelectionController().show();
9283            }
9284            handled = true;
9285        }
9286
9287        // Start a new selection
9288        if (!handled) {
9289            vibrate = handled = startSelectionActionMode();
9290        }
9291
9292        if (vibrate) {
9293            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9294        }
9295
9296        if (handled) {
9297            mDiscardNextActionUp = true;
9298        }
9299
9300        return handled;
9301    }
9302
9303    private boolean touchPositionIsInSelection() {
9304        int selectionStart = getSelectionStart();
9305        int selectionEnd = getSelectionEnd();
9306
9307        if (selectionStart == selectionEnd) {
9308            return false;
9309        }
9310
9311        if (selectionStart > selectionEnd) {
9312            int tmp = selectionStart;
9313            selectionStart = selectionEnd;
9314            selectionEnd = tmp;
9315            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9316        }
9317
9318        SelectionModifierCursorController selectionController = getSelectionController();
9319        int minOffset = selectionController.getMinTouchOffset();
9320        int maxOffset = selectionController.getMaxTouchOffset();
9321
9322        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9323    }
9324
9325    private PositionListener getPositionListener() {
9326        if (mPositionListener == null) {
9327            mPositionListener = new PositionListener();
9328        }
9329        return mPositionListener;
9330    }
9331
9332    private interface TextViewPositionListener {
9333        public void updatePosition(int parentPositionX, int parentPositionY,
9334                boolean parentPositionChanged, boolean parentScrolled);
9335    }
9336
9337    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9338        // 3 handles
9339        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9340        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9341        private TextViewPositionListener[] mPositionListeners =
9342                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9343        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9344        private boolean mPositionHasChanged = true;
9345        // Absolute position of the TextView with respect to its parent window
9346        private int mPositionX, mPositionY;
9347        private int mNumberOfListeners;
9348        private boolean mScrollHasChanged;
9349
9350        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9351            if (mNumberOfListeners == 0) {
9352                updatePosition();
9353                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9354                vto.addOnPreDrawListener(this);
9355            }
9356
9357            int emptySlotIndex = -1;
9358            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9359                TextViewPositionListener listener = mPositionListeners[i];
9360                if (listener == positionListener) {
9361                    return;
9362                } else if (emptySlotIndex < 0 && listener == null) {
9363                    emptySlotIndex = i;
9364                }
9365            }
9366
9367            mPositionListeners[emptySlotIndex] = positionListener;
9368            mCanMove[emptySlotIndex] = canMove;
9369            mNumberOfListeners++;
9370        }
9371
9372        public void removeSubscriber(TextViewPositionListener positionListener) {
9373            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9374                if (mPositionListeners[i] == positionListener) {
9375                    mPositionListeners[i] = null;
9376                    mNumberOfListeners--;
9377                    break;
9378                }
9379            }
9380
9381            if (mNumberOfListeners == 0) {
9382                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9383                vto.removeOnPreDrawListener(this);
9384            }
9385        }
9386
9387        public int getPositionX() {
9388            return mPositionX;
9389        }
9390
9391        public int getPositionY() {
9392            return mPositionY;
9393        }
9394
9395        @Override
9396        public boolean onPreDraw() {
9397            updatePosition();
9398
9399            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9400                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9401                    TextViewPositionListener positionListener = mPositionListeners[i];
9402                    if (positionListener != null) {
9403                        positionListener.updatePosition(mPositionX, mPositionY,
9404                                mPositionHasChanged, mScrollHasChanged);
9405                    }
9406                }
9407            }
9408
9409            mScrollHasChanged = false;
9410            return true;
9411        }
9412
9413        private void updatePosition() {
9414            TextView.this.getLocationInWindow(mTempCoords);
9415
9416            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9417
9418            mPositionX = mTempCoords[0];
9419            mPositionY = mTempCoords[1];
9420        }
9421
9422        public void onScrollChanged() {
9423            mScrollHasChanged = true;
9424        }
9425    }
9426
9427    private boolean isPositionVisible(int positionX, int positionY) {
9428        synchronized (sTmpPosition) {
9429            final float[] position = sTmpPosition;
9430            position[0] = positionX;
9431            position[1] = positionY;
9432            View view = this;
9433
9434            while (view != null) {
9435                if (view != this) {
9436                    // Local scroll is already taken into account in positionX/Y
9437                    position[0] -= view.getScrollX();
9438                    position[1] -= view.getScrollY();
9439                }
9440
9441                if (position[0] < 0 || position[1] < 0 ||
9442                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
9443                    return false;
9444                }
9445
9446                if (!view.getMatrix().isIdentity()) {
9447                    view.getMatrix().mapPoints(position);
9448                }
9449
9450                position[0] += view.getLeft();
9451                position[1] += view.getTop();
9452
9453                final ViewParent parent = view.getParent();
9454                if (parent instanceof View) {
9455                    view = (View) parent;
9456                } else {
9457                    // We've reached the ViewRoot, stop iterating
9458                    view = null;
9459                }
9460            }
9461        }
9462
9463        // We've been able to walk up the view hierarchy and the position was never clipped
9464        return true;
9465    }
9466
9467    private boolean isOffsetVisible(int offset) {
9468        final int line = mLayout.getLineForOffset(offset);
9469        final int lineBottom = mLayout.getLineBottom(line);
9470        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9471        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9472                lineBottom + viewportToContentVerticalOffset());
9473    }
9474
9475    @Override
9476    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9477        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9478        if (mPositionListener != null) {
9479            mPositionListener.onScrollChanged();
9480        }
9481    }
9482
9483    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9484        protected PopupWindow mPopupWindow;
9485        protected ViewGroup mContentView;
9486        int mPositionX, mPositionY;
9487
9488        protected abstract void createPopupWindow();
9489        protected abstract void initContentView();
9490        protected abstract int getTextOffset();
9491        protected abstract int getVerticalLocalPosition(int line);
9492        protected abstract int clipVertically(int positionY);
9493
9494        public PinnedPopupWindow() {
9495            createPopupWindow();
9496
9497            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9498            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9499            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9500
9501            initContentView();
9502
9503            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9504                    ViewGroup.LayoutParams.WRAP_CONTENT);
9505            mContentView.setLayoutParams(wrapContent);
9506
9507            mPopupWindow.setContentView(mContentView);
9508        }
9509
9510        public void show() {
9511            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9512
9513            computeLocalPosition();
9514
9515            final PositionListener positionListener = TextView.this.getPositionListener();
9516            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9517        }
9518
9519        protected void measureContent() {
9520            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9521            mContentView.measure(
9522                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9523                            View.MeasureSpec.AT_MOST),
9524                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9525                            View.MeasureSpec.AT_MOST));
9526        }
9527
9528        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9529         * positioned according to viewportToContentHorizontalOffset.
9530         *
9531         * This method assumes that mContentView has properly been measured from its content. */
9532        private void computeLocalPosition() {
9533            measureContent();
9534            final int width = mContentView.getMeasuredWidth();
9535            final int offset = getTextOffset();
9536            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9537            mPositionX += viewportToContentHorizontalOffset();
9538
9539            final int line = mLayout.getLineForOffset(offset);
9540            mPositionY = getVerticalLocalPosition(line);
9541            mPositionY += viewportToContentVerticalOffset();
9542        }
9543
9544        private void updatePosition(int parentPositionX, int parentPositionY) {
9545            int positionX = parentPositionX + mPositionX;
9546            int positionY = parentPositionY + mPositionY;
9547
9548            positionY = clipVertically(positionY);
9549
9550            // Horizontal clipping
9551            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9552            final int width = mContentView.getMeasuredWidth();
9553            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9554            positionX = Math.max(0, positionX);
9555
9556            if (isShowing()) {
9557                mPopupWindow.update(positionX, positionY, -1, -1);
9558            } else {
9559                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9560                        positionX, positionY);
9561            }
9562        }
9563
9564        public void hide() {
9565            mPopupWindow.dismiss();
9566            TextView.this.getPositionListener().removeSubscriber(this);
9567        }
9568
9569        @Override
9570        public void updatePosition(int parentPositionX, int parentPositionY,
9571                boolean parentPositionChanged, boolean parentScrolled) {
9572            // Either parentPositionChanged or parentScrolled is true, check if still visible
9573            if (isShowing() && isOffsetVisible(getTextOffset())) {
9574                if (parentScrolled) computeLocalPosition();
9575                updatePosition(parentPositionX, parentPositionY);
9576            } else {
9577                hide();
9578            }
9579        }
9580
9581        public boolean isShowing() {
9582            return mPopupWindow.isShowing();
9583        }
9584    }
9585
9586    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9587        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9588        private static final int ADD_TO_DICTIONARY = -1;
9589        private static final int DELETE_TEXT = -2;
9590        private SuggestionInfo[] mSuggestionInfos;
9591        private int mNumberOfSuggestions;
9592        private boolean mCursorWasVisibleBeforeSuggestions;
9593        private boolean mIsShowingUp = false;
9594        private SuggestionAdapter mSuggestionsAdapter;
9595        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9596        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9597
9598        private class CustomPopupWindow extends PopupWindow {
9599            public CustomPopupWindow(Context context, int defStyle) {
9600                super(context, null, defStyle);
9601            }
9602
9603            @Override
9604            public void dismiss() {
9605                super.dismiss();
9606
9607                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9608
9609                // Safe cast since show() checks that mText is an Editable
9610                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9611
9612                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9613                if (hasInsertionController()) {
9614                    getInsertionController().show();
9615                }
9616            }
9617        }
9618
9619        public SuggestionsPopupWindow() {
9620            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9621            mSuggestionSpanComparator = new SuggestionSpanComparator();
9622            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9623        }
9624
9625        @Override
9626        protected void createPopupWindow() {
9627            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9628                com.android.internal.R.attr.textSuggestionsWindowStyle);
9629            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9630            mPopupWindow.setFocusable(true);
9631            mPopupWindow.setClippingEnabled(false);
9632        }
9633
9634        @Override
9635        protected void initContentView() {
9636            ListView listView = new ListView(TextView.this.getContext());
9637            mSuggestionsAdapter = new SuggestionAdapter();
9638            listView.setAdapter(mSuggestionsAdapter);
9639            listView.setOnItemClickListener(this);
9640            mContentView = listView;
9641
9642            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9643            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9644            for (int i = 0; i < mSuggestionInfos.length; i++) {
9645                mSuggestionInfos[i] = new SuggestionInfo();
9646            }
9647        }
9648
9649        public boolean isShowingUp() {
9650            return mIsShowingUp;
9651        }
9652
9653        public void onParentLostFocus() {
9654            mIsShowingUp = false;
9655        }
9656
9657        private class SuggestionInfo {
9658            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9659            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9660            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9661            SpannableStringBuilder text = new SpannableStringBuilder();
9662            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9663                    android.R.style.TextAppearance_SuggestionHighlight);
9664        }
9665
9666        private class SuggestionAdapter extends BaseAdapter {
9667            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9668                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9669
9670            @Override
9671            public int getCount() {
9672                return mNumberOfSuggestions;
9673            }
9674
9675            @Override
9676            public Object getItem(int position) {
9677                return mSuggestionInfos[position];
9678            }
9679
9680            @Override
9681            public long getItemId(int position) {
9682                return position;
9683            }
9684
9685            @Override
9686            public View getView(int position, View convertView, ViewGroup parent) {
9687                TextView textView = (TextView) convertView;
9688
9689                if (textView == null) {
9690                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9691                            false);
9692                }
9693
9694                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9695                textView.setText(suggestionInfo.text);
9696
9697                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9698                    textView.setCompoundDrawablesWithIntrinsicBounds(
9699                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9700                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9701                    textView.setCompoundDrawablesWithIntrinsicBounds(
9702                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9703                } else {
9704                    textView.setCompoundDrawables(null, null, null, null);
9705                }
9706
9707                return textView;
9708            }
9709        }
9710
9711        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9712            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9713                final int flag1 = span1.getFlags();
9714                final int flag2 = span2.getFlags();
9715                if (flag1 != flag2) {
9716                    // The order here should match what is used in updateDrawState
9717                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9718                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9719                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9720                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9721                    if (easy1 && !misspelled1) return -1;
9722                    if (easy2 && !misspelled2) return 1;
9723                    if (misspelled1) return -1;
9724                    if (misspelled2) return 1;
9725                }
9726
9727                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9728            }
9729        }
9730
9731        /**
9732         * Returns the suggestion spans that cover the current cursor position. The suggestion
9733         * spans are sorted according to the length of text that they are attached to.
9734         */
9735        private SuggestionSpan[] getSuggestionSpans() {
9736            int pos = TextView.this.getSelectionStart();
9737            Spannable spannable = (Spannable) TextView.this.mText;
9738            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9739
9740            mSpansLengths.clear();
9741            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9742                int start = spannable.getSpanStart(suggestionSpan);
9743                int end = spannable.getSpanEnd(suggestionSpan);
9744                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9745            }
9746
9747            // The suggestions are sorted according to their types (easy correction first, then
9748            // misspelled) and to the length of the text that they cover (shorter first).
9749            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9750            return suggestionSpans;
9751        }
9752
9753        @Override
9754        public void show() {
9755            if (!(mText instanceof Editable)) return;
9756
9757            if (updateSuggestions()) {
9758                mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9759                setCursorVisible(false);
9760                mIsShowingUp = true;
9761                super.show();
9762            }
9763        }
9764
9765        @Override
9766        protected void measureContent() {
9767            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9768            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9769                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9770            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9771                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9772
9773            int width = 0;
9774            View view = null;
9775            for (int i = 0; i < mNumberOfSuggestions; i++) {
9776                view = mSuggestionsAdapter.getView(i, view, mContentView);
9777                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9778                view.measure(horizontalMeasure, verticalMeasure);
9779                width = Math.max(width, view.getMeasuredWidth());
9780            }
9781
9782            // Enforce the width based on actual text widths
9783            mContentView.measure(
9784                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9785                    verticalMeasure);
9786
9787            Drawable popupBackground = mPopupWindow.getBackground();
9788            if (popupBackground != null) {
9789                if (mTempRect == null) mTempRect = new Rect();
9790                popupBackground.getPadding(mTempRect);
9791                width += mTempRect.left + mTempRect.right;
9792            }
9793            mPopupWindow.setWidth(width);
9794        }
9795
9796        @Override
9797        protected int getTextOffset() {
9798            return getSelectionStart();
9799        }
9800
9801        @Override
9802        protected int getVerticalLocalPosition(int line) {
9803            return mLayout.getLineBottom(line);
9804        }
9805
9806        @Override
9807        protected int clipVertically(int positionY) {
9808            final int height = mContentView.getMeasuredHeight();
9809            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9810            return Math.min(positionY, displayMetrics.heightPixels - height);
9811        }
9812
9813        @Override
9814        public void hide() {
9815            super.hide();
9816        }
9817
9818        private boolean updateSuggestions() {
9819            Spannable spannable = (Spannable) TextView.this.mText;
9820            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9821
9822            final int nbSpans = suggestionSpans.length;
9823            // Suggestions are shown after a delay: the underlying spans may have been removed
9824            if (nbSpans == 0) return false;
9825
9826            mNumberOfSuggestions = 0;
9827            int spanUnionStart = mText.length();
9828            int spanUnionEnd = 0;
9829
9830            SuggestionSpan misspelledSpan = null;
9831            int underlineColor = 0;
9832
9833            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9834                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9835                final int spanStart = spannable.getSpanStart(suggestionSpan);
9836                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9837                spanUnionStart = Math.min(spanStart, spanUnionStart);
9838                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9839
9840                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9841                    misspelledSpan = suggestionSpan;
9842                }
9843
9844                // The first span dictates the background color of the highlighted text
9845                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9846
9847                String[] suggestions = suggestionSpan.getSuggestions();
9848                int nbSuggestions = suggestions.length;
9849                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9850                    String suggestion = suggestions[suggestionIndex];
9851
9852                    boolean suggestionIsDuplicate = false;
9853                    for (int i = 0; i < mNumberOfSuggestions; i++) {
9854                        if (mSuggestionInfos[i].text.toString().equals(suggestion)) {
9855                            SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan;
9856                            final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan);
9857                            final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan);
9858                            if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) {
9859                                suggestionIsDuplicate = true;
9860                                break;
9861                            }
9862                        }
9863                    }
9864
9865                    if (!suggestionIsDuplicate) {
9866                        SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9867                        suggestionInfo.suggestionSpan = suggestionSpan;
9868                        suggestionInfo.suggestionIndex = suggestionIndex;
9869                        suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion);
9870
9871                        mNumberOfSuggestions++;
9872
9873                        if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9874                            // Also end outer for loop
9875                            spanIndex = nbSpans;
9876                            break;
9877                        }
9878                    }
9879                }
9880            }
9881
9882            for (int i = 0; i < mNumberOfSuggestions; i++) {
9883                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9884            }
9885
9886            // Add "Add to dictionary" item if there is a span with the misspelled flag
9887            if (misspelledSpan != null) {
9888                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9889                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9890                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9891                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9892                    suggestionInfo.suggestionSpan = misspelledSpan;
9893                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9894                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9895                            getContext().getString(com.android.internal.R.string.addToDictionary));
9896                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9897                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9898
9899                    mNumberOfSuggestions++;
9900                }
9901            }
9902
9903            // Delete item
9904            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9905            suggestionInfo.suggestionSpan = null;
9906            suggestionInfo.suggestionIndex = DELETE_TEXT;
9907            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9908                    getContext().getString(com.android.internal.R.string.deleteText));
9909            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9910                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9911            mNumberOfSuggestions++;
9912
9913            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9914            if (underlineColor == 0) {
9915                // Fallback on the default highlight color when the first span does not provide one
9916                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9917            } else {
9918                final float BACKGROUND_TRANSPARENCY = 0.4f;
9919                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9920                mSuggestionRangeSpan.setBackgroundColor(
9921                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9922            }
9923            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9924                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9925
9926            mSuggestionsAdapter.notifyDataSetChanged();
9927            return true;
9928        }
9929
9930        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9931                int unionEnd) {
9932            final Spannable text = (Spannable) mText;
9933            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9934            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9935
9936            // Adjust the start/end of the suggestion span
9937            suggestionInfo.suggestionStart = spanStart - unionStart;
9938            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9939                    + suggestionInfo.text.length();
9940
9941            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9942                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9943
9944            // Add the text before and after the span.
9945            final String textAsString = text.toString();
9946            suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart));
9947            suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd));
9948        }
9949
9950        @Override
9951        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9952            Editable editable = (Editable) mText;
9953            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9954
9955            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9956                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9957                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9958                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9959                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9960                    if (spanUnionEnd < editable.length() &&
9961                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9962                            (spanUnionStart == 0 ||
9963                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9964                        spanUnionEnd = spanUnionEnd + 1;
9965                    }
9966                    deleteText_internal(spanUnionStart, spanUnionEnd);
9967                }
9968                hide();
9969                return;
9970            }
9971
9972            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9973            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9974            if (spanStart < 0 || spanEnd <= spanStart) {
9975                // Span has been removed
9976                hide();
9977                return;
9978            }
9979            final String originalText = mText.toString().substring(spanStart, spanEnd);
9980
9981            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9982                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9983                intent.putExtra("word", originalText);
9984                intent.putExtra("locale", getTextServicesLocale().toString());
9985                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9986                getContext().startActivity(intent);
9987                // There is no way to know if the word was indeed added. Re-check.
9988                // TODO The ExtractEditText should remove the span in the original text instead
9989                editable.removeSpan(suggestionInfo.suggestionSpan);
9990                updateSpellCheckSpans(spanStart, spanEnd, false);
9991            } else {
9992                // SuggestionSpans are removed by replace: save them before
9993                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9994                        SuggestionSpan.class);
9995                final int length = suggestionSpans.length;
9996                int[] suggestionSpansStarts = new int[length];
9997                int[] suggestionSpansEnds = new int[length];
9998                int[] suggestionSpansFlags = new int[length];
9999                for (int i = 0; i < length; i++) {
10000                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
10001                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
10002                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
10003                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
10004
10005                    // Remove potential misspelled flags
10006                    int suggestionSpanFlags = suggestionSpan.getFlags();
10007                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
10008                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
10009                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
10010                        suggestionSpan.setFlags(suggestionSpanFlags);
10011                    }
10012                }
10013
10014                final int suggestionStart = suggestionInfo.suggestionStart;
10015                final int suggestionEnd = suggestionInfo.suggestionEnd;
10016                final String suggestion = suggestionInfo.text.subSequence(
10017                        suggestionStart, suggestionEnd).toString();
10018                replaceText_internal(spanStart, spanEnd, suggestion);
10019
10020                // Notify source IME of the suggestion pick. Do this before swaping texts.
10021                if (!TextUtils.isEmpty(
10022                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
10023                    InputMethodManager imm = InputMethodManager.peekInstance();
10024                    if (imm != null) {
10025                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
10026                                suggestionInfo.suggestionIndex);
10027                    }
10028                }
10029
10030                // Swap text content between actual text and Suggestion span
10031                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
10032                suggestions[suggestionInfo.suggestionIndex] = originalText;
10033
10034                // Restore previous SuggestionSpans
10035                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
10036                for (int i = 0; i < length; i++) {
10037                    // Only spans that include the modified region make sense after replacement
10038                    // Spans partially included in the replaced region are removed, there is no
10039                    // way to assign them a valid range after replacement
10040                    if (suggestionSpansStarts[i] <= spanStart &&
10041                            suggestionSpansEnds[i] >= spanEnd) {
10042                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
10043                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
10044                    }
10045                }
10046
10047                // Move cursor at the end of the replaced word
10048                final int newCursorPosition = spanEnd + lengthDifference;
10049                setCursorPosition_internal(newCursorPosition, newCursorPosition);
10050            }
10051
10052            hide();
10053        }
10054    }
10055
10056    /**
10057     * Removes the suggestion spans.
10058     */
10059    CharSequence removeSuggestionSpans(CharSequence text) {
10060       if (text instanceof Spanned) {
10061           Spannable spannable;
10062           if (text instanceof Spannable) {
10063               spannable = (Spannable) text;
10064           } else {
10065               spannable = new SpannableString(text);
10066               text = spannable;
10067           }
10068
10069           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10070           for (int i = 0; i < spans.length; i++) {
10071               spannable.removeSpan(spans[i]);
10072           }
10073       }
10074       return text;
10075    }
10076
10077    void showSuggestions() {
10078        if (mSuggestionsPopupWindow == null) {
10079            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10080        }
10081        hideControllers();
10082        mSuggestionsPopupWindow.show();
10083    }
10084
10085    boolean areSuggestionsShown() {
10086        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10087    }
10088
10089    /**
10090     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10091     * by the IME or by the spell checker as the user types. This is done by adding
10092     * {@link SuggestionSpan}s to the text.
10093     *
10094     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10095     * user asks for them on these parts of the text. This value depends on the inputType of this
10096     * TextView.
10097     *
10098     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10099     *
10100     * In addition, the type variation must be one of
10101     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10102     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10103     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10104     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10105     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10106     *
10107     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10108     *
10109     * @return true if the suggestions popup window is enabled, based on the inputType.
10110     */
10111    public boolean isSuggestionsEnabled() {
10112        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10113        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10114
10115        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10116        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10117                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10118                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10119                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10120                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10121    }
10122
10123    /**
10124     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10125     * selection is initiated in this View.
10126     *
10127     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10128     * Paste actions, depending on what this View supports.
10129     *
10130     * A custom implementation can add new entries in the default menu in its
10131     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10132     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10133     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10134     * or {@link android.R.id#paste} ids as parameters.
10135     *
10136     * Returning false from
10137     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10138     * the action mode from being started.
10139     *
10140     * Action click events should be handled by the custom implementation of
10141     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10142     *
10143     * Note that text selection mode is not started when a TextView receives focus and the
10144     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10145     * that case, to allow for quick replacement.
10146     */
10147    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10148        mCustomSelectionActionModeCallback = actionModeCallback;
10149    }
10150
10151    /**
10152     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10153     *
10154     * @return The current custom selection callback.
10155     */
10156    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10157        return mCustomSelectionActionModeCallback;
10158    }
10159
10160    /**
10161     *
10162     * @return true if the selection mode was actually started.
10163     */
10164    private boolean startSelectionActionMode() {
10165        if (mSelectionActionMode != null) {
10166            // Selection action mode is already started
10167            return false;
10168        }
10169
10170        if (!canSelectText() || !requestFocus()) {
10171            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10172            return false;
10173        }
10174
10175        if (!hasSelection()) {
10176            // There may already be a selection on device rotation
10177            if (!selectCurrentWord()) {
10178                // No word found under cursor or text selection not permitted.
10179                return false;
10180            }
10181        }
10182
10183        boolean willExtract = extractedTextModeWillBeStarted();
10184
10185        // Do not start the action mode when extracted text will show up full screen, which would
10186        // immediately hide the newly created action bar and would be visually distracting.
10187        if (!willExtract) {
10188            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10189            mSelectionActionMode = startActionMode(actionModeCallback);
10190        }
10191
10192        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10193        if (selectionStarted && !mTextIsSelectable && mSoftInputShownOnFocus) {
10194            // Show the IME to be able to replace text, except when selecting non editable text.
10195            final InputMethodManager imm = InputMethodManager.peekInstance();
10196            if (imm != null) {
10197                imm.showSoftInput(this, 0, null);
10198            }
10199        }
10200
10201        return selectionStarted;
10202    }
10203
10204    private boolean extractedTextModeWillBeStarted() {
10205        if (!(this instanceof ExtractEditText)) {
10206            final InputMethodManager imm = InputMethodManager.peekInstance();
10207            return  imm != null && imm.isFullscreenMode();
10208        }
10209        return false;
10210    }
10211
10212    /**
10213     * @hide
10214     */
10215    protected void stopSelectionActionMode() {
10216        if (mSelectionActionMode != null) {
10217            // This will hide the mSelectionModifierCursorController
10218            mSelectionActionMode.finish();
10219        }
10220    }
10221
10222    /**
10223     * Paste clipboard content between min and max positions.
10224     */
10225    private void paste(int min, int max) {
10226        ClipboardManager clipboard =
10227            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10228        ClipData clip = clipboard.getPrimaryClip();
10229        if (clip != null) {
10230            boolean didFirst = false;
10231            for (int i=0; i<clip.getItemCount(); i++) {
10232                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10233                if (paste != null) {
10234                    if (!didFirst) {
10235                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10236                        min = extractRangeStartFromLong(minMax);
10237                        max = extractRangeEndFromLong(minMax);
10238                        Selection.setSelection((Spannable) mText, max);
10239                        ((Editable) mText).replace(min, max, paste);
10240                        didFirst = true;
10241                    } else {
10242                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10243                        ((Editable) mText).insert(getSelectionEnd(), paste);
10244                    }
10245                }
10246            }
10247            stopSelectionActionMode();
10248            sLastCutOrCopyTime = 0;
10249        }
10250    }
10251
10252    private void setPrimaryClip(ClipData clip) {
10253        ClipboardManager clipboard = (ClipboardManager) getContext().
10254                getSystemService(Context.CLIPBOARD_SERVICE);
10255        clipboard.setPrimaryClip(clip);
10256        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10257    }
10258
10259    /**
10260     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10261     *
10262     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10263     * on which of these this TextView supports.
10264     */
10265    private class SelectionActionModeCallback implements ActionMode.Callback {
10266
10267        @Override
10268        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10269            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10270                    com.android.internal.R.styleable.SelectionModeDrawables);
10271
10272            boolean allowText = getContext().getResources().getBoolean(
10273                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10274
10275            mode.setTitle(allowText ?
10276                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10277            mode.setSubtitle(null);
10278
10279            int selectAllIconId = 0; // No icon by default
10280            if (!allowText) {
10281                // Provide an icon, text will not be displayed on smaller screens.
10282                selectAllIconId = styledAttributes.getResourceId(
10283                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10284            }
10285
10286            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10287                    setIcon(selectAllIconId).
10288                    setAlphabeticShortcut('a').
10289                    setShowAsAction(
10290                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10291
10292            if (canCut()) {
10293                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10294                    setIcon(styledAttributes.getResourceId(
10295                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10296                    setAlphabeticShortcut('x').
10297                    setShowAsAction(
10298                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10299            }
10300
10301            if (canCopy()) {
10302                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10303                    setIcon(styledAttributes.getResourceId(
10304                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10305                    setAlphabeticShortcut('c').
10306                    setShowAsAction(
10307                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10308            }
10309
10310            if (canPaste()) {
10311                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10312                        setIcon(styledAttributes.getResourceId(
10313                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10314                        setAlphabeticShortcut('v').
10315                        setShowAsAction(
10316                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10317            }
10318
10319            styledAttributes.recycle();
10320
10321            if (mCustomSelectionActionModeCallback != null) {
10322                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10323                    // The custom mode can choose to cancel the action mode
10324                    return false;
10325                }
10326            }
10327
10328            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10329                getSelectionController().show();
10330                return true;
10331            } else {
10332                return false;
10333            }
10334        }
10335
10336        @Override
10337        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10338            if (mCustomSelectionActionModeCallback != null) {
10339                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10340            }
10341            return true;
10342        }
10343
10344        @Override
10345        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10346            if (mCustomSelectionActionModeCallback != null &&
10347                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10348                return true;
10349            }
10350            return onTextContextMenuItem(item.getItemId());
10351        }
10352
10353        @Override
10354        public void onDestroyActionMode(ActionMode mode) {
10355            if (mCustomSelectionActionModeCallback != null) {
10356                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10357            }
10358            Selection.setSelection((Spannable) mText, getSelectionEnd());
10359
10360            if (mSelectionModifierCursorController != null) {
10361                mSelectionModifierCursorController.hide();
10362            }
10363
10364            mSelectionActionMode = null;
10365        }
10366    }
10367
10368    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10369        private static final int POPUP_TEXT_LAYOUT =
10370                com.android.internal.R.layout.text_edit_action_popup_text;
10371        private TextView mPasteTextView;
10372        private TextView mReplaceTextView;
10373
10374        @Override
10375        protected void createPopupWindow() {
10376            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10377                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10378            mPopupWindow.setClippingEnabled(true);
10379        }
10380
10381        @Override
10382        protected void initContentView() {
10383            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10384            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10385            mContentView = linearLayout;
10386            mContentView.setBackgroundResource(
10387                    com.android.internal.R.drawable.text_edit_paste_window);
10388
10389            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10390                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10391
10392            LayoutParams wrapContent = new LayoutParams(
10393                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10394
10395            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10396            mPasteTextView.setLayoutParams(wrapContent);
10397            mContentView.addView(mPasteTextView);
10398            mPasteTextView.setText(com.android.internal.R.string.paste);
10399            mPasteTextView.setOnClickListener(this);
10400
10401            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10402            mReplaceTextView.setLayoutParams(wrapContent);
10403            mContentView.addView(mReplaceTextView);
10404            mReplaceTextView.setText(com.android.internal.R.string.replace);
10405            mReplaceTextView.setOnClickListener(this);
10406        }
10407
10408        @Override
10409        public void show() {
10410            boolean canPaste = canPaste();
10411            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10412            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10413            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10414
10415            if (!canPaste && !canSuggest) return;
10416
10417            super.show();
10418        }
10419
10420        @Override
10421        public void onClick(View view) {
10422            if (view == mPasteTextView && canPaste()) {
10423                onTextContextMenuItem(ID_PASTE);
10424                hide();
10425            } else if (view == mReplaceTextView) {
10426                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10427                stopSelectionActionMode();
10428                Selection.setSelection((Spannable) mText, middle);
10429                showSuggestions();
10430            }
10431        }
10432
10433        @Override
10434        protected int getTextOffset() {
10435            return (getSelectionStart() + getSelectionEnd()) / 2;
10436        }
10437
10438        @Override
10439        protected int getVerticalLocalPosition(int line) {
10440            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10441        }
10442
10443        @Override
10444        protected int clipVertically(int positionY) {
10445            if (positionY < 0) {
10446                final int offset = getTextOffset();
10447                final int line = mLayout.getLineForOffset(offset);
10448                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10449                positionY += mContentView.getMeasuredHeight();
10450
10451                // Assumes insertion and selection handles share the same height
10452                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10453                positionY += handle.getIntrinsicHeight();
10454            }
10455
10456            return positionY;
10457        }
10458    }
10459
10460    private abstract class HandleView extends View implements TextViewPositionListener {
10461        protected Drawable mDrawable;
10462        protected Drawable mDrawableLtr;
10463        protected Drawable mDrawableRtl;
10464        private final PopupWindow mContainer;
10465        // Position with respect to the parent TextView
10466        private int mPositionX, mPositionY;
10467        private boolean mIsDragging;
10468        // Offset from touch position to mPosition
10469        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10470        protected int mHotspotX;
10471        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10472        private float mTouchOffsetY;
10473        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10474        private float mIdealVerticalOffset;
10475        // Parent's (TextView) previous position in window
10476        private int mLastParentX, mLastParentY;
10477        // Transient action popup window for Paste and Replace actions
10478        protected ActionPopupWindow mActionPopupWindow;
10479        // Previous text character offset
10480        private int mPreviousOffset = -1;
10481        // Previous text character offset
10482        private boolean mPositionHasChanged = true;
10483        // Used to delay the appearance of the action popup window
10484        private Runnable mActionPopupShower;
10485
10486        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10487            super(TextView.this.mContext);
10488            mContainer = new PopupWindow(TextView.this.mContext, null,
10489                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10490            mContainer.setSplitTouchEnabled(true);
10491            mContainer.setClippingEnabled(false);
10492            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10493            mContainer.setContentView(this);
10494
10495            mDrawableLtr = drawableLtr;
10496            mDrawableRtl = drawableRtl;
10497
10498            updateDrawable();
10499
10500            final int handleHeight = mDrawable.getIntrinsicHeight();
10501            mTouchOffsetY = -0.3f * handleHeight;
10502            mIdealVerticalOffset = 0.7f * handleHeight;
10503        }
10504
10505        protected void updateDrawable() {
10506            final int offset = getCurrentCursorOffset();
10507            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10508            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10509            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10510        }
10511
10512        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10513
10514        // Touch-up filter: number of previous positions remembered
10515        private static final int HISTORY_SIZE = 5;
10516        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10517        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10518        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10519        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10520        private int mPreviousOffsetIndex = 0;
10521        private int mNumberPreviousOffsets = 0;
10522
10523        private void startTouchUpFilter(int offset) {
10524            mNumberPreviousOffsets = 0;
10525            addPositionToTouchUpFilter(offset);
10526        }
10527
10528        private void addPositionToTouchUpFilter(int offset) {
10529            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10530            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10531            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10532            mNumberPreviousOffsets++;
10533        }
10534
10535        private void filterOnTouchUp() {
10536            final long now = SystemClock.uptimeMillis();
10537            int i = 0;
10538            int index = mPreviousOffsetIndex;
10539            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10540            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10541                i++;
10542                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10543            }
10544
10545            if (i > 0 && i < iMax &&
10546                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10547                positionAtCursorOffset(mPreviousOffsets[index], false);
10548            }
10549        }
10550
10551        public boolean offsetHasBeenChanged() {
10552            return mNumberPreviousOffsets > 1;
10553        }
10554
10555        @Override
10556        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10557            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10558        }
10559
10560        public void show() {
10561            if (isShowing()) return;
10562
10563            getPositionListener().addSubscriber(this, true /* local position may change */);
10564
10565            // Make sure the offset is always considered new, even when focusing at same position
10566            mPreviousOffset = -1;
10567            positionAtCursorOffset(getCurrentCursorOffset(), false);
10568
10569            hideActionPopupWindow();
10570        }
10571
10572        protected void dismiss() {
10573            mIsDragging = false;
10574            mContainer.dismiss();
10575            onDetached();
10576        }
10577
10578        public void hide() {
10579            dismiss();
10580
10581            TextView.this.getPositionListener().removeSubscriber(this);
10582        }
10583
10584        void showActionPopupWindow(int delay) {
10585            if (mActionPopupWindow == null) {
10586                mActionPopupWindow = new ActionPopupWindow();
10587            }
10588            if (mActionPopupShower == null) {
10589                mActionPopupShower = new Runnable() {
10590                    public void run() {
10591                        mActionPopupWindow.show();
10592                    }
10593                };
10594            } else {
10595                TextView.this.removeCallbacks(mActionPopupShower);
10596            }
10597            TextView.this.postDelayed(mActionPopupShower, delay);
10598        }
10599
10600        protected void hideActionPopupWindow() {
10601            if (mActionPopupShower != null) {
10602                TextView.this.removeCallbacks(mActionPopupShower);
10603            }
10604            if (mActionPopupWindow != null) {
10605                mActionPopupWindow.hide();
10606            }
10607        }
10608
10609        public boolean isShowing() {
10610            return mContainer.isShowing();
10611        }
10612
10613        private boolean isVisible() {
10614            // Always show a dragging handle.
10615            if (mIsDragging) {
10616                return true;
10617            }
10618
10619            if (isInBatchEditMode()) {
10620                return false;
10621            }
10622
10623            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10624        }
10625
10626        public abstract int getCurrentCursorOffset();
10627
10628        protected abstract void updateSelection(int offset);
10629
10630        public abstract void updatePosition(float x, float y);
10631
10632        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10633            // A HandleView relies on the layout, which may be nulled by external methods
10634            if (mLayout == null) {
10635                // Will update controllers' state, hiding them and stopping selection mode if needed
10636                prepareCursorControllers();
10637                return;
10638            }
10639
10640            if (offset != mPreviousOffset || parentScrolled) {
10641                updateSelection(offset);
10642                addPositionToTouchUpFilter(offset);
10643                final int line = mLayout.getLineForOffset(offset);
10644
10645                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10646                mPositionY = mLayout.getLineBottom(line);
10647
10648                // Take TextView's padding and scroll into account.
10649                mPositionX += viewportToContentHorizontalOffset();
10650                mPositionY += viewportToContentVerticalOffset();
10651
10652                mPreviousOffset = offset;
10653                mPositionHasChanged = true;
10654            }
10655        }
10656
10657        public void updatePosition(int parentPositionX, int parentPositionY,
10658                boolean parentPositionChanged, boolean parentScrolled) {
10659            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10660            if (parentPositionChanged || mPositionHasChanged) {
10661                if (mIsDragging) {
10662                    // Update touchToWindow offset in case of parent scrolling while dragging
10663                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10664                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10665                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10666                        mLastParentX = parentPositionX;
10667                        mLastParentY = parentPositionY;
10668                    }
10669
10670                    onHandleMoved();
10671                }
10672
10673                if (isVisible()) {
10674                    final int positionX = parentPositionX + mPositionX;
10675                    final int positionY = parentPositionY + mPositionY;
10676                    if (isShowing()) {
10677                        mContainer.update(positionX, positionY, -1, -1);
10678                    } else {
10679                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10680                                positionX, positionY);
10681                    }
10682                } else {
10683                    if (isShowing()) {
10684                        dismiss();
10685                    }
10686                }
10687
10688                mPositionHasChanged = false;
10689            }
10690        }
10691
10692        @Override
10693        protected void onDraw(Canvas c) {
10694            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10695            mDrawable.draw(c);
10696        }
10697
10698        @Override
10699        public boolean onTouchEvent(MotionEvent ev) {
10700            switch (ev.getActionMasked()) {
10701                case MotionEvent.ACTION_DOWN: {
10702                    startTouchUpFilter(getCurrentCursorOffset());
10703                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10704                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10705
10706                    final PositionListener positionListener = getPositionListener();
10707                    mLastParentX = positionListener.getPositionX();
10708                    mLastParentY = positionListener.getPositionY();
10709                    mIsDragging = true;
10710                    break;
10711                }
10712
10713                case MotionEvent.ACTION_MOVE: {
10714                    final float rawX = ev.getRawX();
10715                    final float rawY = ev.getRawY();
10716
10717                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10718                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10719                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10720                    float newVerticalOffset;
10721                    if (previousVerticalOffset < mIdealVerticalOffset) {
10722                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10723                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10724                    } else {
10725                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10726                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10727                    }
10728                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10729
10730                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10731                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10732
10733                    updatePosition(newPosX, newPosY);
10734                    break;
10735                }
10736
10737                case MotionEvent.ACTION_UP:
10738                    filterOnTouchUp();
10739                    mIsDragging = false;
10740                    break;
10741
10742                case MotionEvent.ACTION_CANCEL:
10743                    mIsDragging = false;
10744                    break;
10745            }
10746            return true;
10747        }
10748
10749        public boolean isDragging() {
10750            return mIsDragging;
10751        }
10752
10753        void onHandleMoved() {
10754            hideActionPopupWindow();
10755        }
10756
10757        public void onDetached() {
10758            hideActionPopupWindow();
10759        }
10760    }
10761
10762    private class InsertionHandleView extends HandleView {
10763        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10764        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10765
10766        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10767        private float mDownPositionX, mDownPositionY;
10768        private Runnable mHider;
10769
10770        public InsertionHandleView(Drawable drawable) {
10771            super(drawable, drawable);
10772        }
10773
10774        @Override
10775        public void show() {
10776            super.show();
10777
10778            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10779            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10780                showActionPopupWindow(0);
10781            }
10782
10783            hideAfterDelay();
10784        }
10785
10786        public void showWithActionPopup() {
10787            show();
10788            showActionPopupWindow(0);
10789        }
10790
10791        private void hideAfterDelay() {
10792            removeHiderCallback();
10793            if (mHider == null) {
10794                mHider = new Runnable() {
10795                    public void run() {
10796                        hide();
10797                    }
10798                };
10799            }
10800            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10801        }
10802
10803        private void removeHiderCallback() {
10804            if (mHider != null) {
10805                TextView.this.removeCallbacks(mHider);
10806            }
10807        }
10808
10809        @Override
10810        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10811            return drawable.getIntrinsicWidth() / 2;
10812        }
10813
10814        @Override
10815        public boolean onTouchEvent(MotionEvent ev) {
10816            final boolean result = super.onTouchEvent(ev);
10817
10818            switch (ev.getActionMasked()) {
10819                case MotionEvent.ACTION_DOWN:
10820                    mDownPositionX = ev.getRawX();
10821                    mDownPositionY = ev.getRawY();
10822                    break;
10823
10824                case MotionEvent.ACTION_UP:
10825                    if (!offsetHasBeenChanged()) {
10826                        final float deltaX = mDownPositionX - ev.getRawX();
10827                        final float deltaY = mDownPositionY - ev.getRawY();
10828                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10829
10830                        final ViewConfiguration viewConfiguration = ViewConfiguration.get(
10831                                TextView.this.getContext());
10832                        final int touchSlop = viewConfiguration.getScaledTouchSlop();
10833
10834                        if (distanceSquared < touchSlop * touchSlop) {
10835                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10836                                // Tapping on the handle dismisses the displayed action popup
10837                                mActionPopupWindow.hide();
10838                            } else {
10839                                showWithActionPopup();
10840                            }
10841                        }
10842                    }
10843                    hideAfterDelay();
10844                    break;
10845
10846                case MotionEvent.ACTION_CANCEL:
10847                    hideAfterDelay();
10848                    break;
10849
10850                default:
10851                    break;
10852            }
10853
10854            return result;
10855        }
10856
10857        @Override
10858        public int getCurrentCursorOffset() {
10859            return TextView.this.getSelectionStart();
10860        }
10861
10862        @Override
10863        public void updateSelection(int offset) {
10864            Selection.setSelection((Spannable) mText, offset);
10865        }
10866
10867        @Override
10868        public void updatePosition(float x, float y) {
10869            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10870        }
10871
10872        @Override
10873        void onHandleMoved() {
10874            super.onHandleMoved();
10875            removeHiderCallback();
10876        }
10877
10878        @Override
10879        public void onDetached() {
10880            super.onDetached();
10881            removeHiderCallback();
10882        }
10883    }
10884
10885    private class SelectionStartHandleView extends HandleView {
10886
10887        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10888            super(drawableLtr, drawableRtl);
10889        }
10890
10891        @Override
10892        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10893            if (isRtlRun) {
10894                return drawable.getIntrinsicWidth() / 4;
10895            } else {
10896                return (drawable.getIntrinsicWidth() * 3) / 4;
10897            }
10898        }
10899
10900        @Override
10901        public int getCurrentCursorOffset() {
10902            return TextView.this.getSelectionStart();
10903        }
10904
10905        @Override
10906        public void updateSelection(int offset) {
10907            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10908            updateDrawable();
10909        }
10910
10911        @Override
10912        public void updatePosition(float x, float y) {
10913            int offset = getOffsetForPosition(x, y);
10914
10915            // Handles can not cross and selection is at least one character
10916            final int selectionEnd = getSelectionEnd();
10917            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10918
10919            positionAtCursorOffset(offset, false);
10920        }
10921
10922        public ActionPopupWindow getActionPopupWindow() {
10923            return mActionPopupWindow;
10924        }
10925    }
10926
10927    private class SelectionEndHandleView extends HandleView {
10928
10929        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10930            super(drawableLtr, drawableRtl);
10931        }
10932
10933        @Override
10934        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10935            if (isRtlRun) {
10936                return (drawable.getIntrinsicWidth() * 3) / 4;
10937            } else {
10938                return drawable.getIntrinsicWidth() / 4;
10939            }
10940        }
10941
10942        @Override
10943        public int getCurrentCursorOffset() {
10944            return TextView.this.getSelectionEnd();
10945        }
10946
10947        @Override
10948        public void updateSelection(int offset) {
10949            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10950            updateDrawable();
10951        }
10952
10953        @Override
10954        public void updatePosition(float x, float y) {
10955            int offset = getOffsetForPosition(x, y);
10956
10957            // Handles can not cross and selection is at least one character
10958            final int selectionStart = getSelectionStart();
10959            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10960
10961            positionAtCursorOffset(offset, false);
10962        }
10963
10964        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10965            mActionPopupWindow = actionPopupWindow;
10966        }
10967    }
10968
10969    /**
10970     * A CursorController instance can be used to control a cursor in the text.
10971     * It is not used outside of {@link TextView}.
10972     * @hide
10973     */
10974    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10975        /**
10976         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10977         * See also {@link #hide()}.
10978         */
10979        public void show();
10980
10981        /**
10982         * Hide the cursor controller from screen.
10983         * See also {@link #show()}.
10984         */
10985        public void hide();
10986
10987        /**
10988         * Called when the view is detached from window. Perform house keeping task, such as
10989         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10990         * preventing the activity from being recycled.
10991         */
10992        public void onDetached();
10993    }
10994
10995    private class InsertionPointCursorController implements CursorController {
10996        private InsertionHandleView mHandle;
10997
10998        public void show() {
10999            getHandle().show();
11000        }
11001
11002        public void showWithActionPopup() {
11003            getHandle().showWithActionPopup();
11004        }
11005
11006        public void hide() {
11007            if (mHandle != null) {
11008                mHandle.hide();
11009            }
11010        }
11011
11012        public void onTouchModeChanged(boolean isInTouchMode) {
11013            if (!isInTouchMode) {
11014                hide();
11015            }
11016        }
11017
11018        private InsertionHandleView getHandle() {
11019            if (mSelectHandleCenter == null) {
11020                mSelectHandleCenter = mContext.getResources().getDrawable(
11021                        mTextSelectHandleRes);
11022            }
11023            if (mHandle == null) {
11024                mHandle = new InsertionHandleView(mSelectHandleCenter);
11025            }
11026            return mHandle;
11027        }
11028
11029        @Override
11030        public void onDetached() {
11031            final ViewTreeObserver observer = getViewTreeObserver();
11032            observer.removeOnTouchModeChangeListener(this);
11033
11034            if (mHandle != null) mHandle.onDetached();
11035        }
11036    }
11037
11038    private class SelectionModifierCursorController implements CursorController {
11039        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
11040        // The cursor controller handles, lazily created when shown.
11041        private SelectionStartHandleView mStartHandle;
11042        private SelectionEndHandleView mEndHandle;
11043        // The offsets of that last touch down event. Remembered to start selection there.
11044        private int mMinTouchOffset, mMaxTouchOffset;
11045
11046        // Double tap detection
11047        private long mPreviousTapUpTime = 0;
11048        private float mDownPositionX, mDownPositionY;
11049        private boolean mGestureStayedInTapRegion;
11050
11051        SelectionModifierCursorController() {
11052            resetTouchOffsets();
11053        }
11054
11055        public void show() {
11056            if (isInBatchEditMode()) {
11057                return;
11058            }
11059            initDrawables();
11060            initHandles();
11061            hideInsertionPointCursorController();
11062        }
11063
11064        private void initDrawables() {
11065            if (mSelectHandleLeft == null) {
11066                mSelectHandleLeft = mContext.getResources().getDrawable(
11067                        mTextSelectHandleLeftRes);
11068            }
11069            if (mSelectHandleRight == null) {
11070                mSelectHandleRight = mContext.getResources().getDrawable(
11071                        mTextSelectHandleRightRes);
11072            }
11073        }
11074
11075        private void initHandles() {
11076            // Lazy object creation has to be done before updatePosition() is called.
11077            if (mStartHandle == null) {
11078                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11079            }
11080            if (mEndHandle == null) {
11081                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11082            }
11083
11084            mStartHandle.show();
11085            mEndHandle.show();
11086
11087            // Make sure both left and right handles share the same ActionPopupWindow (so that
11088            // moving any of the handles hides the action popup).
11089            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11090            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11091
11092            hideInsertionPointCursorController();
11093        }
11094
11095        public void hide() {
11096            if (mStartHandle != null) mStartHandle.hide();
11097            if (mEndHandle != null) mEndHandle.hide();
11098        }
11099
11100        public void onTouchEvent(MotionEvent event) {
11101            // This is done even when the View does not have focus, so that long presses can start
11102            // selection and tap can move cursor from this tap position.
11103            switch (event.getActionMasked()) {
11104                case MotionEvent.ACTION_DOWN:
11105                    final float x = event.getX();
11106                    final float y = event.getY();
11107
11108                    // Remember finger down position, to be able to start selection from there
11109                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11110
11111                    // Double tap detection
11112                    if (mGestureStayedInTapRegion) {
11113                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11114                        if (duration <= ViewConfiguration.getDoubleTapTimeout()) {
11115                            final float deltaX = x - mDownPositionX;
11116                            final float deltaY = y - mDownPositionY;
11117                            final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11118
11119                            ViewConfiguration viewConfiguration = ViewConfiguration.get(
11120                                    TextView.this.getContext());
11121                            int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop();
11122                            boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop;
11123
11124                            if (stayedInArea && isPositionOnText(x, y)) {
11125                                startSelectionActionMode();
11126                                mDiscardNextActionUp = true;
11127                            }
11128                        }
11129                    }
11130
11131                    mDownPositionX = x;
11132                    mDownPositionY = y;
11133                    mGestureStayedInTapRegion = true;
11134                    break;
11135
11136                case MotionEvent.ACTION_POINTER_DOWN:
11137                case MotionEvent.ACTION_POINTER_UP:
11138                    // Handle multi-point gestures. Keep min and max offset positions.
11139                    // Only activated for devices that correctly handle multi-touch.
11140                    if (mContext.getPackageManager().hasSystemFeature(
11141                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11142                        updateMinAndMaxOffsets(event);
11143                    }
11144                    break;
11145
11146                case MotionEvent.ACTION_MOVE:
11147                    if (mGestureStayedInTapRegion) {
11148                        final float deltaX = event.getX() - mDownPositionX;
11149                        final float deltaY = event.getY() - mDownPositionY;
11150                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11151
11152                        final ViewConfiguration viewConfiguration = ViewConfiguration.get(
11153                                TextView.this.getContext());
11154                        int doubleTapTouchSlop = viewConfiguration.getScaledDoubleTapTouchSlop();
11155
11156                        if (distanceSquared > doubleTapTouchSlop * doubleTapTouchSlop) {
11157                            mGestureStayedInTapRegion = false;
11158                        }
11159                    }
11160                    break;
11161
11162                case MotionEvent.ACTION_UP:
11163                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11164                    break;
11165            }
11166        }
11167
11168        /**
11169         * @param event
11170         */
11171        private void updateMinAndMaxOffsets(MotionEvent event) {
11172            int pointerCount = event.getPointerCount();
11173            for (int index = 0; index < pointerCount; index++) {
11174                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11175                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11176                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11177            }
11178        }
11179
11180        public int getMinTouchOffset() {
11181            return mMinTouchOffset;
11182        }
11183
11184        public int getMaxTouchOffset() {
11185            return mMaxTouchOffset;
11186        }
11187
11188        public void resetTouchOffsets() {
11189            mMinTouchOffset = mMaxTouchOffset = -1;
11190        }
11191
11192        /**
11193         * @return true iff this controller is currently used to move the selection start.
11194         */
11195        public boolean isSelectionStartDragged() {
11196            return mStartHandle != null && mStartHandle.isDragging();
11197        }
11198
11199        public void onTouchModeChanged(boolean isInTouchMode) {
11200            if (!isInTouchMode) {
11201                hide();
11202            }
11203        }
11204
11205        @Override
11206        public void onDetached() {
11207            final ViewTreeObserver observer = getViewTreeObserver();
11208            observer.removeOnTouchModeChangeListener(this);
11209
11210            if (mStartHandle != null) mStartHandle.onDetached();
11211            if (mEndHandle != null) mEndHandle.onDetached();
11212        }
11213    }
11214
11215    private void hideInsertionPointCursorController() {
11216        // No need to create the controller to hide it.
11217        if (mInsertionPointCursorController != null) {
11218            mInsertionPointCursorController.hide();
11219        }
11220    }
11221
11222    /**
11223     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11224     */
11225    private void hideControllers() {
11226        hideCursorControllers();
11227        hideSpanControllers();
11228    }
11229
11230    private void hideSpanControllers() {
11231        if (mChangeWatcher != null) {
11232            mChangeWatcher.hideControllers();
11233        }
11234    }
11235
11236    private void hideCursorControllers() {
11237        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11238            // Should be done before hide insertion point controller since it triggers a show of it
11239            mSuggestionsPopupWindow.hide();
11240        }
11241        hideInsertionPointCursorController();
11242        stopSelectionActionMode();
11243    }
11244
11245    /**
11246     * Get the character offset closest to the specified absolute position. A typical use case is to
11247     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11248     *
11249     * @param x The horizontal absolute position of a point on screen
11250     * @param y The vertical absolute position of a point on screen
11251     * @return the character offset for the character whose position is closest to the specified
11252     *  position. Returns -1 if there is no layout.
11253     */
11254    public int getOffsetForPosition(float x, float y) {
11255        if (getLayout() == null) return -1;
11256        final int line = getLineAtCoordinate(y);
11257        final int offset = getOffsetAtCoordinate(line, x);
11258        return offset;
11259    }
11260
11261    private float convertToLocalHorizontalCoordinate(float x) {
11262        x -= getTotalPaddingLeft();
11263        // Clamp the position to inside of the view.
11264        x = Math.max(0.0f, x);
11265        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11266        x += getScrollX();
11267        return x;
11268    }
11269
11270    private int getLineAtCoordinate(float y) {
11271        y -= getTotalPaddingTop();
11272        // Clamp the position to inside of the view.
11273        y = Math.max(0.0f, y);
11274        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11275        y += getScrollY();
11276        return getLayout().getLineForVertical((int) y);
11277    }
11278
11279    private int getOffsetAtCoordinate(int line, float x) {
11280        x = convertToLocalHorizontalCoordinate(x);
11281        return getLayout().getOffsetForHorizontal(line, x);
11282    }
11283
11284    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11285     * in the view. Returns false when the position is in the empty space of left/right of text.
11286     */
11287    private boolean isPositionOnText(float x, float y) {
11288        if (getLayout() == null) return false;
11289
11290        final int line = getLineAtCoordinate(y);
11291        x = convertToLocalHorizontalCoordinate(x);
11292
11293        if (x < getLayout().getLineLeft(line)) return false;
11294        if (x > getLayout().getLineRight(line)) return false;
11295        return true;
11296    }
11297
11298    @Override
11299    public boolean onDragEvent(DragEvent event) {
11300        switch (event.getAction()) {
11301            case DragEvent.ACTION_DRAG_STARTED:
11302                return hasInsertionController();
11303
11304            case DragEvent.ACTION_DRAG_ENTERED:
11305                TextView.this.requestFocus();
11306                return true;
11307
11308            case DragEvent.ACTION_DRAG_LOCATION:
11309                final int offset = getOffsetForPosition(event.getX(), event.getY());
11310                Selection.setSelection((Spannable)mText, offset);
11311                return true;
11312
11313            case DragEvent.ACTION_DROP:
11314                onDrop(event);
11315                return true;
11316
11317            case DragEvent.ACTION_DRAG_ENDED:
11318            case DragEvent.ACTION_DRAG_EXITED:
11319            default:
11320                return true;
11321        }
11322    }
11323
11324    private void onDrop(DragEvent event) {
11325        StringBuilder content = new StringBuilder("");
11326        ClipData clipData = event.getClipData();
11327        final int itemCount = clipData.getItemCount();
11328        for (int i=0; i < itemCount; i++) {
11329            Item item = clipData.getItemAt(i);
11330            content.append(item.coerceToText(TextView.this.mContext));
11331        }
11332
11333        final int offset = getOffsetForPosition(event.getX(), event.getY());
11334
11335        Object localState = event.getLocalState();
11336        DragLocalState dragLocalState = null;
11337        if (localState instanceof DragLocalState) {
11338            dragLocalState = (DragLocalState) localState;
11339        }
11340        boolean dragDropIntoItself = dragLocalState != null &&
11341                dragLocalState.sourceTextView == this;
11342
11343        if (dragDropIntoItself) {
11344            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11345                // A drop inside the original selection discards the drop.
11346                return;
11347            }
11348        }
11349
11350        final int originalLength = mText.length();
11351        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11352        int min = extractRangeStartFromLong(minMax);
11353        int max = extractRangeEndFromLong(minMax);
11354
11355        Selection.setSelection((Spannable) mText, max);
11356        replaceText_internal(min, max, content);
11357
11358        if (dragDropIntoItself) {
11359            int dragSourceStart = dragLocalState.start;
11360            int dragSourceEnd = dragLocalState.end;
11361            if (max <= dragSourceStart) {
11362                // Inserting text before selection has shifted positions
11363                final int shift = mText.length() - originalLength;
11364                dragSourceStart += shift;
11365                dragSourceEnd += shift;
11366            }
11367
11368            // Delete original selection
11369            deleteText_internal(dragSourceStart, dragSourceEnd);
11370
11371            // Make sure we do not leave two adjacent spaces.
11372            if ((dragSourceStart == 0 ||
11373                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11374                    (dragSourceStart == mText.length() ||
11375                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11376                final int pos = dragSourceStart == mText.length() ?
11377                        dragSourceStart - 1 : dragSourceStart;
11378                deleteText_internal(pos, pos + 1);
11379            }
11380        }
11381    }
11382
11383    /**
11384     * @return True if this view supports insertion handles.
11385     */
11386    boolean hasInsertionController() {
11387        return mInsertionControllerEnabled;
11388    }
11389
11390    /**
11391     * @return True if this view supports selection handles.
11392     */
11393    boolean hasSelectionController() {
11394        return mSelectionControllerEnabled;
11395    }
11396
11397    InsertionPointCursorController getInsertionController() {
11398        if (!mInsertionControllerEnabled) {
11399            return null;
11400        }
11401
11402        if (mInsertionPointCursorController == null) {
11403            mInsertionPointCursorController = new InsertionPointCursorController();
11404
11405            final ViewTreeObserver observer = getViewTreeObserver();
11406            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11407        }
11408
11409        return mInsertionPointCursorController;
11410    }
11411
11412    SelectionModifierCursorController getSelectionController() {
11413        if (!mSelectionControllerEnabled) {
11414            return null;
11415        }
11416
11417        if (mSelectionModifierCursorController == null) {
11418            mSelectionModifierCursorController = new SelectionModifierCursorController();
11419
11420            final ViewTreeObserver observer = getViewTreeObserver();
11421            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11422        }
11423
11424        return mSelectionModifierCursorController;
11425    }
11426
11427    boolean isInBatchEditMode() {
11428        final InputMethodState ims = mInputMethodState;
11429        if (ims != null) {
11430            return ims.mBatchEditNesting > 0;
11431        }
11432        return mInBatchEditControllers;
11433    }
11434
11435    @Override
11436    protected void resolveTextDirection() {
11437        if (hasPasswordTransformationMethod()) {
11438            mTextDir = TextDirectionHeuristics.LOCALE;
11439            return;
11440        }
11441
11442        // Always need to resolve layout direction first
11443        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11444
11445        // Then resolve text direction on the parent
11446        super.resolveTextDirection();
11447
11448        // Now, we can select the heuristic
11449        int textDir = getResolvedTextDirection();
11450        switch (textDir) {
11451            default:
11452            case TEXT_DIRECTION_FIRST_STRONG:
11453                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11454                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11455                break;
11456            case TEXT_DIRECTION_ANY_RTL:
11457                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11458                break;
11459            case TEXT_DIRECTION_LTR:
11460                mTextDir = TextDirectionHeuristics.LTR;
11461                break;
11462            case TEXT_DIRECTION_RTL:
11463                mTextDir = TextDirectionHeuristics.RTL;
11464                break;
11465            case TEXT_DIRECTION_LOCALE:
11466                mTextDir = TextDirectionHeuristics.LOCALE;
11467                break;
11468        }
11469    }
11470
11471    /**
11472     * Subclasses will need to override this method to implement their own way of resolving
11473     * drawables depending on the layout direction.
11474     *
11475     * A call to the super method will be required from the subclasses implementation.
11476     *
11477     */
11478    protected void resolveDrawables() {
11479        // No need to resolve twice
11480        if (mResolvedDrawables) {
11481            return;
11482        }
11483        // No drawable to resolve
11484        if (mDrawables == null) {
11485            return;
11486        }
11487        // No relative drawable to resolve
11488        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11489            mResolvedDrawables = true;
11490            return;
11491        }
11492
11493        Drawables dr = mDrawables;
11494        switch(getResolvedLayoutDirection()) {
11495            case LAYOUT_DIRECTION_RTL:
11496                if (dr.mDrawableStart != null) {
11497                    dr.mDrawableRight = dr.mDrawableStart;
11498
11499                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11500                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11501                }
11502                if (dr.mDrawableEnd != null) {
11503                    dr.mDrawableLeft = dr.mDrawableEnd;
11504
11505                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11506                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11507                }
11508                break;
11509
11510            case LAYOUT_DIRECTION_LTR:
11511            default:
11512                if (dr.mDrawableStart != null) {
11513                    dr.mDrawableLeft = dr.mDrawableStart;
11514
11515                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11516                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11517                }
11518                if (dr.mDrawableEnd != null) {
11519                    dr.mDrawableRight = dr.mDrawableEnd;
11520
11521                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11522                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11523                }
11524                break;
11525        }
11526        mResolvedDrawables = true;
11527    }
11528
11529    protected void resetResolvedDrawables() {
11530        mResolvedDrawables = false;
11531    }
11532
11533    /**
11534     * @hide
11535     */
11536    protected void viewClicked(InputMethodManager imm) {
11537        if (imm != null) {
11538            imm.viewClicked(this);
11539        }
11540    }
11541
11542    /**
11543     * Deletes the range of text [start, end[.
11544     * @hide
11545     */
11546    protected void deleteText_internal(int start, int end) {
11547        ((Editable) mText).delete(start, end);
11548    }
11549
11550    /**
11551     * Replaces the range of text [start, end[ by replacement text
11552     * @hide
11553     */
11554    protected void replaceText_internal(int start, int end, CharSequence text) {
11555        ((Editable) mText).replace(start, end, text);
11556    }
11557
11558    /**
11559     * Sets a span on the specified range of text
11560     * @hide
11561     */
11562    protected void setSpan_internal(Object span, int start, int end, int flags) {
11563        ((Editable) mText).setSpan(span, start, end, flags);
11564    }
11565
11566    /**
11567     * Moves the cursor to the specified offset position in text
11568     * @hide
11569     */
11570    protected void setCursorPosition_internal(int start, int end) {
11571        Selection.setSelection(((Editable) mText), start, end);
11572    }
11573
11574    @ViewDebug.ExportedProperty(category = "text")
11575    private CharSequence            mText;
11576    private CharSequence            mTransformed;
11577    private BufferType              mBufferType = BufferType.NORMAL;
11578
11579    private int                     mInputType = EditorInfo.TYPE_NULL;
11580    private CharSequence            mHint;
11581    private Layout                  mHintLayout;
11582
11583    private KeyListener             mInput;
11584
11585    private MovementMethod          mMovement;
11586    private TransformationMethod    mTransformation;
11587    private boolean                 mAllowTransformationLengthChange;
11588    private ChangeWatcher           mChangeWatcher;
11589
11590    private ArrayList<TextWatcher>  mListeners = null;
11591
11592    // display attributes
11593    private final TextPaint         mTextPaint;
11594    private boolean                 mUserSetTextScaleX;
11595    private final Paint             mHighlightPaint;
11596    private int                     mHighlightColor = 0x6633B5E5;
11597    private Layout                  mLayout;
11598
11599    private long                    mShowCursor;
11600    private Blink                   mBlink;
11601    private boolean                 mCursorVisible = true;
11602
11603    // Cursor Controllers.
11604    private InsertionPointCursorController mInsertionPointCursorController;
11605    private SelectionModifierCursorController mSelectionModifierCursorController;
11606    private ActionMode              mSelectionActionMode;
11607    private boolean                 mInsertionControllerEnabled;
11608    private boolean                 mSelectionControllerEnabled;
11609    private boolean                 mInBatchEditControllers;
11610
11611    private boolean                 mSelectAllOnFocus = false;
11612
11613    private int                     mGravity = Gravity.TOP | Gravity.START;
11614    private boolean                 mHorizontallyScrolling;
11615
11616    private int                     mAutoLinkMask;
11617    private boolean                 mLinksClickable = true;
11618
11619    private float                   mSpacingMult = 1.0f;
11620    private float                   mSpacingAdd = 0.0f;
11621    private boolean                 mTextIsSelectable = false;
11622
11623    private static final int        LINES = 1;
11624    private static final int        EMS = LINES;
11625    private static final int        PIXELS = 2;
11626
11627    private int                     mMaximum = Integer.MAX_VALUE;
11628    private int                     mMaxMode = LINES;
11629    private int                     mMinimum = 0;
11630    private int                     mMinMode = LINES;
11631
11632    private int                     mOldMaximum = mMaximum;
11633    private int                     mOldMaxMode = mMaxMode;
11634
11635    private int                     mMaxWidth = Integer.MAX_VALUE;
11636    private int                     mMaxWidthMode = PIXELS;
11637    private int                     mMinWidth = 0;
11638    private int                     mMinWidthMode = PIXELS;
11639
11640    private boolean                 mSingleLine;
11641    private int                     mDesiredHeightAtMeasure = -1;
11642    private boolean                 mIncludePad = true;
11643
11644    // tmp primitives, so we don't alloc them on each draw
11645    private Path                    mHighlightPath;
11646    private boolean                 mHighlightPathBogus = true;
11647    private static final RectF      sTempRect = new RectF();
11648    private static final float[]    sTmpPosition = new float[2];
11649
11650    // XXX should be much larger
11651    private static final int        VERY_WIDE = 1024*1024;
11652
11653    private static final int        BLINK = 500;
11654
11655    private static final int ANIMATED_SCROLL_GAP = 250;
11656    private long mLastScroll;
11657    private Scroller mScroller = null;
11658
11659    private BoringLayout.Metrics mBoring;
11660    private BoringLayout.Metrics mHintBoring;
11661
11662    private BoringLayout mSavedLayout, mSavedHintLayout;
11663
11664    private TextDirectionHeuristic mTextDir = null;
11665
11666    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11667    private InputFilter[] mFilters = NO_FILTERS;
11668    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11669    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11670    // System wide time for last cut or copy action.
11671    private static long sLastCutOrCopyTime;
11672    // Used to highlight a word when it is corrected by the IME
11673    private CorrectionHighlighter mCorrectionHighlighter;
11674    // New state used to change background based on whether this TextView is multiline.
11675    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11676}
11677