TextView.java revision cb2516bb660c6035f1e75dffa45fdf3cd5fc620d 
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.pm.PackageManager;
25import android.content.res.ColorStateList;
26import android.content.res.Resources;
27import android.content.res.TypedArray;
28import android.content.res.XmlResourceParser;
29import android.graphics.Canvas;
30import android.graphics.Color;
31import android.graphics.Paint;
32import android.graphics.Path;
33import android.graphics.Rect;
34import android.graphics.RectF;
35import android.graphics.Typeface;
36import android.graphics.drawable.Drawable;
37import android.inputmethodservice.ExtractEditText;
38import android.net.Uri;
39import android.os.Bundle;
40import android.os.Handler;
41import android.os.Message;
42import android.os.Parcel;
43import android.os.Parcelable;
44import android.os.SystemClock;
45import android.text.BoringLayout;
46import android.text.DynamicLayout;
47import android.text.Editable;
48import android.text.GetChars;
49import android.text.GraphicsOperations;
50import android.text.InputFilter;
51import android.text.InputType;
52import android.text.Layout;
53import android.text.ParcelableSpan;
54import android.text.Selection;
55import android.text.SpanWatcher;
56import android.text.Spannable;
57import android.text.SpannableString;
58import android.text.SpannableStringBuilder;
59import android.text.Spanned;
60import android.text.SpannedString;
61import android.text.StaticLayout;
62import android.text.TextDirectionHeuristic;
63import android.text.TextDirectionHeuristics;
64import android.text.TextDirectionHeuristics.AnyStrong;
65import android.text.TextDirectionHeuristics.CharCount;
66import android.text.TextDirectionHeuristics.FirstStrong;
67import android.text.TextDirectionHeuristics.TextDirectionAlgorithm;
68import android.text.TextDirectionHeuristics.TextDirectionHeuristicImpl;
69import android.text.TextPaint;
70import android.text.TextUtils;
71import android.text.TextWatcher;
72import android.text.method.AllCapsTransformationMethod;
73import android.text.method.ArrowKeyMovementMethod;
74import android.text.method.DateKeyListener;
75import android.text.method.DateTimeKeyListener;
76import android.text.method.DialerKeyListener;
77import android.text.method.DigitsKeyListener;
78import android.text.method.KeyListener;
79import android.text.method.LinkMovementMethod;
80import android.text.method.MetaKeyKeyListener;
81import android.text.method.MovementMethod;
82import android.text.method.PasswordTransformationMethod;
83import android.text.method.SingleLineTransformationMethod;
84import android.text.method.TextKeyListener;
85import android.text.method.TimeKeyListener;
86import android.text.method.TransformationMethod;
87import android.text.method.TransformationMethod2;
88import android.text.method.WordIterator;
89import android.text.style.ClickableSpan;
90import android.text.style.ParagraphStyle;
91import android.text.style.SuggestionSpan;
92import android.text.style.TextAppearanceSpan;
93import android.text.style.URLSpan;
94import android.text.style.UnderlineSpan;
95import android.text.style.UpdateAppearance;
96import android.text.util.Linkify;
97import android.util.AttributeSet;
98import android.util.DisplayMetrics;
99import android.util.FloatMath;
100import android.util.Log;
101import android.util.TypedValue;
102import android.view.ActionMode;
103import android.view.ActionMode.Callback;
104import android.view.ContextMenu;
105import android.view.DragEvent;
106import android.view.Gravity;
107import android.view.HapticFeedbackConstants;
108import android.view.KeyCharacterMap;
109import android.view.KeyEvent;
110import android.view.LayoutInflater;
111import android.view.Menu;
112import android.view.MenuItem;
113import android.view.MotionEvent;
114import android.view.View;
115import android.view.ViewConfiguration;
116import android.view.ViewDebug;
117import android.view.ViewGroup;
118import android.view.ViewGroup.LayoutParams;
119import android.view.ViewParent;
120import android.view.ViewRootImpl;
121import android.view.ViewTreeObserver;
122import android.view.WindowManager;
123import android.view.accessibility.AccessibilityEvent;
124import android.view.accessibility.AccessibilityManager;
125import android.view.accessibility.AccessibilityNodeInfo;
126import android.view.animation.AnimationUtils;
127import android.view.inputmethod.BaseInputConnection;
128import android.view.inputmethod.CompletionInfo;
129import android.view.inputmethod.CorrectionInfo;
130import android.view.inputmethod.EditorInfo;
131import android.view.inputmethod.ExtractedText;
132import android.view.inputmethod.ExtractedTextRequest;
133import android.view.inputmethod.InputConnection;
134import android.view.inputmethod.InputMethodManager;
135import android.widget.RemoteViews.RemoteView;
136
137import com.android.internal.util.FastMath;
138import com.android.internal.widget.EditableInputConnection;
139
140import org.xmlpull.v1.XmlPullParserException;
141
142import java.io.IOException;
143import java.lang.ref.WeakReference;
144import java.text.BreakIterator;
145import java.util.ArrayList;
146import java.util.Arrays;
147import java.util.Comparator;
148import java.util.HashMap;
149
150/**
151 * Displays text to the user and optionally allows them to edit it.  A TextView
152 * is a complete text editor, however the basic class is configured to not
153 * allow editing; see {@link EditText} for a subclass that configures the text
154 * view for editing.
155 *
156 * <p>
157 * <b>XML attributes</b>
158 * <p>
159 * See {@link android.R.styleable#TextView TextView Attributes},
160 * {@link android.R.styleable#View View Attributes}
161 *
162 * @attr ref android.R.styleable#TextView_text
163 * @attr ref android.R.styleable#TextView_bufferType
164 * @attr ref android.R.styleable#TextView_hint
165 * @attr ref android.R.styleable#TextView_textColor
166 * @attr ref android.R.styleable#TextView_textColorHighlight
167 * @attr ref android.R.styleable#TextView_textColorHint
168 * @attr ref android.R.styleable#TextView_textAppearance
169 * @attr ref android.R.styleable#TextView_textColorLink
170 * @attr ref android.R.styleable#TextView_textSize
171 * @attr ref android.R.styleable#TextView_textScaleX
172 * @attr ref android.R.styleable#TextView_typeface
173 * @attr ref android.R.styleable#TextView_textStyle
174 * @attr ref android.R.styleable#TextView_cursorVisible
175 * @attr ref android.R.styleable#TextView_maxLines
176 * @attr ref android.R.styleable#TextView_maxHeight
177 * @attr ref android.R.styleable#TextView_lines
178 * @attr ref android.R.styleable#TextView_height
179 * @attr ref android.R.styleable#TextView_minLines
180 * @attr ref android.R.styleable#TextView_minHeight
181 * @attr ref android.R.styleable#TextView_maxEms
182 * @attr ref android.R.styleable#TextView_maxWidth
183 * @attr ref android.R.styleable#TextView_ems
184 * @attr ref android.R.styleable#TextView_width
185 * @attr ref android.R.styleable#TextView_minEms
186 * @attr ref android.R.styleable#TextView_minWidth
187 * @attr ref android.R.styleable#TextView_gravity
188 * @attr ref android.R.styleable#TextView_scrollHorizontally
189 * @attr ref android.R.styleable#TextView_password
190 * @attr ref android.R.styleable#TextView_singleLine
191 * @attr ref android.R.styleable#TextView_selectAllOnFocus
192 * @attr ref android.R.styleable#TextView_includeFontPadding
193 * @attr ref android.R.styleable#TextView_maxLength
194 * @attr ref android.R.styleable#TextView_shadowColor
195 * @attr ref android.R.styleable#TextView_shadowDx
196 * @attr ref android.R.styleable#TextView_shadowDy
197 * @attr ref android.R.styleable#TextView_shadowRadius
198 * @attr ref android.R.styleable#TextView_autoLink
199 * @attr ref android.R.styleable#TextView_linksClickable
200 * @attr ref android.R.styleable#TextView_numeric
201 * @attr ref android.R.styleable#TextView_digits
202 * @attr ref android.R.styleable#TextView_phoneNumber
203 * @attr ref android.R.styleable#TextView_inputMethod
204 * @attr ref android.R.styleable#TextView_capitalize
205 * @attr ref android.R.styleable#TextView_autoText
206 * @attr ref android.R.styleable#TextView_editable
207 * @attr ref android.R.styleable#TextView_freezesText
208 * @attr ref android.R.styleable#TextView_ellipsize
209 * @attr ref android.R.styleable#TextView_drawableTop
210 * @attr ref android.R.styleable#TextView_drawableBottom
211 * @attr ref android.R.styleable#TextView_drawableRight
212 * @attr ref android.R.styleable#TextView_drawableLeft
213 * @attr ref android.R.styleable#TextView_drawablePadding
214 * @attr ref android.R.styleable#TextView_lineSpacingExtra
215 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
216 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
217 * @attr ref android.R.styleable#TextView_inputType
218 * @attr ref android.R.styleable#TextView_imeOptions
219 * @attr ref android.R.styleable#TextView_privateImeOptions
220 * @attr ref android.R.styleable#TextView_imeActionLabel
221 * @attr ref android.R.styleable#TextView_imeActionId
222 * @attr ref android.R.styleable#TextView_editorExtras
223 */
224@RemoteView
225public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
226    static final String LOG_TAG = "TextView";
227    static final boolean DEBUG_EXTRACT = false;
228
229    private static final int PRIORITY = 100;
230    private int mCurrentAlpha = 255;
231
232    final int[] mTempCoords = new int[2];
233    Rect mTempRect;
234
235    private ColorStateList mTextColor;
236    private int mCurTextColor;
237    private ColorStateList mHintTextColor;
238    private ColorStateList mLinkTextColor;
239    private int mCurHintTextColor;
240    private boolean mFreezesText;
241    private boolean mFrozenWithFocus;
242    private boolean mTemporaryDetach;
243    private boolean mDispatchTemporaryDetach;
244
245    private boolean mDiscardNextActionUp = false;
246    private boolean mIgnoreActionUpEvent = false;
247
248    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
249    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
250
251    private float mShadowRadius, mShadowDx, mShadowDy;
252
253    private static final int PREDRAW_NOT_REGISTERED = 0;
254    private static final int PREDRAW_PENDING = 1;
255    private static final int PREDRAW_DONE = 2;
256    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
257
258    private TextUtils.TruncateAt mEllipsize = null;
259
260    // Enum for the "typeface" XML parameter.
261    // TODO: How can we get this from the XML instead of hardcoding it here?
262    private static final int SANS = 1;
263    private static final int SERIF = 2;
264    private static final int MONOSPACE = 3;
265
266    // Bitfield for the "numeric" XML parameter.
267    // TODO: How can we get this from the XML instead of hardcoding it here?
268    private static final int SIGNED = 2;
269    private static final int DECIMAL = 4;
270
271    class Drawables {
272        final Rect mCompoundRect = new Rect();
273        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
274                mDrawableStart, mDrawableEnd;
275        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
276                mDrawableSizeStart, mDrawableSizeEnd;
277        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
278                mDrawableHeightStart, mDrawableHeightEnd;
279        int mDrawablePadding;
280    }
281    private Drawables mDrawables;
282
283    private CharSequence mError;
284    private boolean mErrorWasChanged;
285    private ErrorPopup mPopup;
286    /**
287     * This flag is set if the TextView tries to display an error before it
288     * is attached to the window (so its position is still unknown).
289     * It causes the error to be shown later, when onAttachedToWindow()
290     * is called.
291     */
292    private boolean mShowErrorAfterAttach;
293
294    private CharWrapper mCharWrapper = null;
295
296    private boolean mSelectionMoved = false;
297    private boolean mTouchFocusSelected = false;
298
299    private Marquee mMarquee;
300    private boolean mRestartMarquee;
301
302    private int mMarqueeRepeatLimit = 3;
303
304    class InputContentType {
305        int imeOptions = EditorInfo.IME_NULL;
306        String privateImeOptions;
307        CharSequence imeActionLabel;
308        int imeActionId;
309        Bundle extras;
310        OnEditorActionListener onEditorActionListener;
311        boolean enterDown;
312    }
313    InputContentType mInputContentType;
314
315    class InputMethodState {
316        Rect mCursorRectInWindow = new Rect();
317        RectF mTmpRectF = new RectF();
318        float[] mTmpOffset = new float[2];
319        ExtractedTextRequest mExtracting;
320        final ExtractedText mTmpExtracted = new ExtractedText();
321        int mBatchEditNesting;
322        boolean mCursorChanged;
323        boolean mSelectionModeChanged;
324        boolean mContentChanged;
325        int mChangedStart, mChangedEnd, mChangedDelta;
326    }
327    InputMethodState mInputMethodState;
328
329    private int mTextSelectHandleLeftRes;
330    private int mTextSelectHandleRightRes;
331    private int mTextSelectHandleRes;
332
333    private int mTextEditSuggestionItemLayout;
334    private SuggestionsPopupWindow mSuggestionsPopupWindow;
335    private SuggestionRangeSpan mSuggestionRangeSpan;
336    private boolean mSuggestionsEnabled = true;
337
338    private int mCursorDrawableRes;
339    private final Drawable[] mCursorDrawable = new Drawable[2];
340    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
341
342    private Drawable mSelectHandleLeft;
343    private Drawable mSelectHandleRight;
344    private Drawable mSelectHandleCenter;
345
346    // Global listener that detects changes in the global position of the TextView
347    private PositionListener mPositionListener;
348
349    private float mLastDownPositionX, mLastDownPositionY;
350    private Callback mCustomSelectionActionModeCallback;
351
352    private final int mSquaredTouchSlopDistance;
353    // Set when this TextView gained focus with some text selected. Will start selection mode.
354    private boolean mCreatedWithASelection = false;
355
356    private WordIterator mWordIterator;
357
358    // The alignment to pass to Layout, or null if not resolved.
359    private Layout.Alignment mLayoutAlignment;
360
361    // The default value for mTextAlign.
362    private TextAlign mTextAlign = TextAlign.INHERIT;
363
364    private static enum TextAlign {
365        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
366    }
367
368    private boolean mResolvedDrawables = false;
369
370    /*
371     * Kick-start the font cache for the zygote process (to pay the cost of
372     * initializing freetype for our default font only once).
373     */
374    static {
375        Paint p = new Paint();
376        p.setAntiAlias(true);
377        // We don't care about the result, just the side-effect of measuring.
378        p.measureText("H");
379    }
380
381    /**
382     * Interface definition for a callback to be invoked when an action is
383     * performed on the editor.
384     */
385    public interface OnEditorActionListener {
386        /**
387         * Called when an action is being performed.
388         *
389         * @param v The view that was clicked.
390         * @param actionId Identifier of the action.  This will be either the
391         * identifier you supplied, or {@link EditorInfo#IME_NULL
392         * EditorInfo.IME_NULL} if being called due to the enter key
393         * being pressed.
394         * @param event If triggered by an enter key, this is the event;
395         * otherwise, this is null.
396         * @return Return true if you have consumed the action, else false.
397         */
398        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
399    }
400
401    public TextView(Context context) {
402        this(context, null);
403    }
404
405    public TextView(Context context,
406                    AttributeSet attrs) {
407        this(context, attrs, com.android.internal.R.attr.textViewStyle);
408    }
409
410    @SuppressWarnings("deprecation")
411    public TextView(Context context,
412                    AttributeSet attrs,
413                    int defStyle) {
414        super(context, attrs, defStyle);
415        mText = "";
416
417        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
418        mTextPaint.density = getResources().getDisplayMetrics().density;
419        mTextPaint.setCompatibilityScaling(
420                getResources().getCompatibilityInfo().applicationScale);
421
422        // If we get the paint from the skin, we should set it to left, since
423        // the layout always wants it to be left.
424        // mTextPaint.setTextAlign(Paint.Align.LEFT);
425
426        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
427        mHighlightPaint.setCompatibilityScaling(
428                getResources().getCompatibilityInfo().applicationScale);
429
430        mMovement = getDefaultMovementMethod();
431        mTransformation = null;
432
433        TypedArray a =
434            context.obtainStyledAttributes(
435                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
436
437        int textColorHighlight = 0;
438        ColorStateList textColor = null;
439        ColorStateList textColorHint = null;
440        ColorStateList textColorLink = null;
441        int textSize = 15;
442        int typefaceIndex = -1;
443        int styleIndex = -1;
444        boolean allCaps = false;
445
446        /*
447         * Look the appearance up without checking first if it exists because
448         * almost every TextView has one and it greatly simplifies the logic
449         * to be able to parse the appearance first and then let specific tags
450         * for this View override it.
451         */
452        TypedArray appearance = null;
453        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
454        if (ap != -1) {
455            appearance = context.obtainStyledAttributes(ap,
456                                com.android.internal.R.styleable.
457                                TextAppearance);
458        }
459        if (appearance != null) {
460            int n = appearance.getIndexCount();
461            for (int i = 0; i < n; i++) {
462                int attr = appearance.getIndex(i);
463
464                switch (attr) {
465                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
466                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
467                    break;
468
469                case com.android.internal.R.styleable.TextAppearance_textColor:
470                    textColor = appearance.getColorStateList(attr);
471                    break;
472
473                case com.android.internal.R.styleable.TextAppearance_textColorHint:
474                    textColorHint = appearance.getColorStateList(attr);
475                    break;
476
477                case com.android.internal.R.styleable.TextAppearance_textColorLink:
478                    textColorLink = appearance.getColorStateList(attr);
479                    break;
480
481                case com.android.internal.R.styleable.TextAppearance_textSize:
482                    textSize = appearance.getDimensionPixelSize(attr, textSize);
483                    break;
484
485                case com.android.internal.R.styleable.TextAppearance_typeface:
486                    typefaceIndex = appearance.getInt(attr, -1);
487                    break;
488
489                case com.android.internal.R.styleable.TextAppearance_textStyle:
490                    styleIndex = appearance.getInt(attr, -1);
491                    break;
492
493                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
494                    allCaps = appearance.getBoolean(attr, false);
495                    break;
496                }
497            }
498
499            appearance.recycle();
500        }
501
502        boolean editable = getDefaultEditable();
503        CharSequence inputMethod = null;
504        int numeric = 0;
505        CharSequence digits = null;
506        boolean phone = false;
507        boolean autotext = false;
508        int autocap = -1;
509        int buffertype = 0;
510        boolean selectallonfocus = false;
511        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
512            drawableBottom = null, drawableStart = null, drawableEnd = null;
513        int drawablePadding = 0;
514        int ellipsize = -1;
515        boolean singleLine = false;
516        int maxlength = -1;
517        CharSequence text = "";
518        CharSequence hint = null;
519        int shadowcolor = 0;
520        float dx = 0, dy = 0, r = 0;
521        boolean password = false;
522        int inputType = EditorInfo.TYPE_NULL;
523
524        int n = a.getIndexCount();
525        for (int i = 0; i < n; i++) {
526            int attr = a.getIndex(i);
527
528            switch (attr) {
529            case com.android.internal.R.styleable.TextView_editable:
530                editable = a.getBoolean(attr, editable);
531                break;
532
533            case com.android.internal.R.styleable.TextView_inputMethod:
534                inputMethod = a.getText(attr);
535                break;
536
537            case com.android.internal.R.styleable.TextView_numeric:
538                numeric = a.getInt(attr, numeric);
539                break;
540
541            case com.android.internal.R.styleable.TextView_digits:
542                digits = a.getText(attr);
543                break;
544
545            case com.android.internal.R.styleable.TextView_phoneNumber:
546                phone = a.getBoolean(attr, phone);
547                break;
548
549            case com.android.internal.R.styleable.TextView_autoText:
550                autotext = a.getBoolean(attr, autotext);
551                break;
552
553            case com.android.internal.R.styleable.TextView_capitalize:
554                autocap = a.getInt(attr, autocap);
555                break;
556
557            case com.android.internal.R.styleable.TextView_bufferType:
558                buffertype = a.getInt(attr, buffertype);
559                break;
560
561            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
562                selectallonfocus = a.getBoolean(attr, selectallonfocus);
563                break;
564
565            case com.android.internal.R.styleable.TextView_autoLink:
566                mAutoLinkMask = a.getInt(attr, 0);
567                break;
568
569            case com.android.internal.R.styleable.TextView_linksClickable:
570                mLinksClickable = a.getBoolean(attr, true);
571                break;
572
573            case com.android.internal.R.styleable.TextView_drawableLeft:
574                drawableLeft = a.getDrawable(attr);
575                break;
576
577            case com.android.internal.R.styleable.TextView_drawableTop:
578                drawableTop = a.getDrawable(attr);
579                break;
580
581            case com.android.internal.R.styleable.TextView_drawableRight:
582                drawableRight = a.getDrawable(attr);
583                break;
584
585            case com.android.internal.R.styleable.TextView_drawableBottom:
586                drawableBottom = a.getDrawable(attr);
587                break;
588
589            case com.android.internal.R.styleable.TextView_drawableStart:
590                drawableStart = a.getDrawable(attr);
591                break;
592
593            case com.android.internal.R.styleable.TextView_drawableEnd:
594                drawableEnd = a.getDrawable(attr);
595                break;
596
597            case com.android.internal.R.styleable.TextView_drawablePadding:
598                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
599                break;
600
601            case com.android.internal.R.styleable.TextView_maxLines:
602                setMaxLines(a.getInt(attr, -1));
603                break;
604
605            case com.android.internal.R.styleable.TextView_maxHeight:
606                setMaxHeight(a.getDimensionPixelSize(attr, -1));
607                break;
608
609            case com.android.internal.R.styleable.TextView_lines:
610                setLines(a.getInt(attr, -1));
611                break;
612
613            case com.android.internal.R.styleable.TextView_height:
614                setHeight(a.getDimensionPixelSize(attr, -1));
615                break;
616
617            case com.android.internal.R.styleable.TextView_minLines:
618                setMinLines(a.getInt(attr, -1));
619                break;
620
621            case com.android.internal.R.styleable.TextView_minHeight:
622                setMinHeight(a.getDimensionPixelSize(attr, -1));
623                break;
624
625            case com.android.internal.R.styleable.TextView_maxEms:
626                setMaxEms(a.getInt(attr, -1));
627                break;
628
629            case com.android.internal.R.styleable.TextView_maxWidth:
630                setMaxWidth(a.getDimensionPixelSize(attr, -1));
631                break;
632
633            case com.android.internal.R.styleable.TextView_ems:
634                setEms(a.getInt(attr, -1));
635                break;
636
637            case com.android.internal.R.styleable.TextView_width:
638                setWidth(a.getDimensionPixelSize(attr, -1));
639                break;
640
641            case com.android.internal.R.styleable.TextView_minEms:
642                setMinEms(a.getInt(attr, -1));
643                break;
644
645            case com.android.internal.R.styleable.TextView_minWidth:
646                setMinWidth(a.getDimensionPixelSize(attr, -1));
647                break;
648
649            case com.android.internal.R.styleable.TextView_gravity:
650                setGravity(a.getInt(attr, -1));
651                break;
652
653            case com.android.internal.R.styleable.TextView_hint:
654                hint = a.getText(attr);
655                break;
656
657            case com.android.internal.R.styleable.TextView_text:
658                text = a.getText(attr);
659                break;
660
661            case com.android.internal.R.styleable.TextView_scrollHorizontally:
662                if (a.getBoolean(attr, false)) {
663                    setHorizontallyScrolling(true);
664                }
665                break;
666
667            case com.android.internal.R.styleable.TextView_singleLine:
668                singleLine = a.getBoolean(attr, singleLine);
669                break;
670
671            case com.android.internal.R.styleable.TextView_ellipsize:
672                ellipsize = a.getInt(attr, ellipsize);
673                break;
674
675            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
676                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
677                break;
678
679            case com.android.internal.R.styleable.TextView_includeFontPadding:
680                if (!a.getBoolean(attr, true)) {
681                    setIncludeFontPadding(false);
682                }
683                break;
684
685            case com.android.internal.R.styleable.TextView_cursorVisible:
686                if (!a.getBoolean(attr, true)) {
687                    setCursorVisible(false);
688                }
689                break;
690
691            case com.android.internal.R.styleable.TextView_maxLength:
692                maxlength = a.getInt(attr, -1);
693                break;
694
695            case com.android.internal.R.styleable.TextView_textScaleX:
696                setTextScaleX(a.getFloat(attr, 1.0f));
697                break;
698
699            case com.android.internal.R.styleable.TextView_freezesText:
700                mFreezesText = a.getBoolean(attr, false);
701                break;
702
703            case com.android.internal.R.styleable.TextView_shadowColor:
704                shadowcolor = a.getInt(attr, 0);
705                break;
706
707            case com.android.internal.R.styleable.TextView_shadowDx:
708                dx = a.getFloat(attr, 0);
709                break;
710
711            case com.android.internal.R.styleable.TextView_shadowDy:
712                dy = a.getFloat(attr, 0);
713                break;
714
715            case com.android.internal.R.styleable.TextView_shadowRadius:
716                r = a.getFloat(attr, 0);
717                break;
718
719            case com.android.internal.R.styleable.TextView_enabled:
720                setEnabled(a.getBoolean(attr, isEnabled()));
721                break;
722
723            case com.android.internal.R.styleable.TextView_textColorHighlight:
724                textColorHighlight = a.getColor(attr, textColorHighlight);
725                break;
726
727            case com.android.internal.R.styleable.TextView_textColor:
728                textColor = a.getColorStateList(attr);
729                break;
730
731            case com.android.internal.R.styleable.TextView_textColorHint:
732                textColorHint = a.getColorStateList(attr);
733                break;
734
735            case com.android.internal.R.styleable.TextView_textColorLink:
736                textColorLink = a.getColorStateList(attr);
737                break;
738
739            case com.android.internal.R.styleable.TextView_textSize:
740                textSize = a.getDimensionPixelSize(attr, textSize);
741                break;
742
743            case com.android.internal.R.styleable.TextView_typeface:
744                typefaceIndex = a.getInt(attr, typefaceIndex);
745                break;
746
747            case com.android.internal.R.styleable.TextView_textStyle:
748                styleIndex = a.getInt(attr, styleIndex);
749                break;
750
751            case com.android.internal.R.styleable.TextView_password:
752                password = a.getBoolean(attr, password);
753                break;
754
755            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
756                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
757                break;
758
759            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
760                mSpacingMult = a.getFloat(attr, mSpacingMult);
761                break;
762
763            case com.android.internal.R.styleable.TextView_inputType:
764                inputType = a.getInt(attr, mInputType);
765                break;
766
767            case com.android.internal.R.styleable.TextView_imeOptions:
768                if (mInputContentType == null) {
769                    mInputContentType = new InputContentType();
770                }
771                mInputContentType.imeOptions = a.getInt(attr,
772                        mInputContentType.imeOptions);
773                break;
774
775            case com.android.internal.R.styleable.TextView_imeActionLabel:
776                if (mInputContentType == null) {
777                    mInputContentType = new InputContentType();
778                }
779                mInputContentType.imeActionLabel = a.getText(attr);
780                break;
781
782            case com.android.internal.R.styleable.TextView_imeActionId:
783                if (mInputContentType == null) {
784                    mInputContentType = new InputContentType();
785                }
786                mInputContentType.imeActionId = a.getInt(attr,
787                        mInputContentType.imeActionId);
788                break;
789
790            case com.android.internal.R.styleable.TextView_privateImeOptions:
791                setPrivateImeOptions(a.getString(attr));
792                break;
793
794            case com.android.internal.R.styleable.TextView_editorExtras:
795                try {
796                    setInputExtras(a.getResourceId(attr, 0));
797                } catch (XmlPullParserException e) {
798                    Log.w(LOG_TAG, "Failure reading input extras", e);
799                } catch (IOException e) {
800                    Log.w(LOG_TAG, "Failure reading input extras", e);
801                }
802                break;
803
804            case com.android.internal.R.styleable.TextView_textCursorDrawable:
805                mCursorDrawableRes = a.getResourceId(attr, 0);
806                break;
807
808            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
809                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
810                break;
811
812            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
813                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
814                break;
815
816            case com.android.internal.R.styleable.TextView_textSelectHandle:
817                mTextSelectHandleRes = a.getResourceId(attr, 0);
818                break;
819
820            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
821                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
822                break;
823
824            case com.android.internal.R.styleable.TextView_textIsSelectable:
825                mTextIsSelectable = a.getBoolean(attr, false);
826                break;
827
828            case com.android.internal.R.styleable.TextView_suggestionsEnabled:
829                mSuggestionsEnabled = a.getBoolean(attr, true);
830                break;
831
832            case com.android.internal.R.styleable.TextView_textAllCaps:
833                allCaps = a.getBoolean(attr, false);
834                break;
835            }
836        }
837        a.recycle();
838
839        BufferType bufferType = BufferType.EDITABLE;
840
841        final int variation =
842                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
843        final boolean passwordInputType = variation
844                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
845        final boolean webPasswordInputType = variation
846                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
847        final boolean numberPasswordInputType = variation
848                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
849
850        if (inputMethod != null) {
851            Class<?> c;
852
853            try {
854                c = Class.forName(inputMethod.toString());
855            } catch (ClassNotFoundException ex) {
856                throw new RuntimeException(ex);
857            }
858
859            try {
860                mInput = (KeyListener) c.newInstance();
861            } catch (InstantiationException ex) {
862                throw new RuntimeException(ex);
863            } catch (IllegalAccessException ex) {
864                throw new RuntimeException(ex);
865            }
866            try {
867                mInputType = inputType != EditorInfo.TYPE_NULL
868                        ? inputType
869                        : mInput.getInputType();
870            } catch (IncompatibleClassChangeError e) {
871                mInputType = EditorInfo.TYPE_CLASS_TEXT;
872            }
873        } else if (digits != null) {
874            mInput = DigitsKeyListener.getInstance(digits.toString());
875            // If no input type was specified, we will default to generic
876            // text, since we can't tell the IME about the set of digits
877            // that was selected.
878            mInputType = inputType != EditorInfo.TYPE_NULL
879                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
880        } else if (inputType != EditorInfo.TYPE_NULL) {
881            setInputType(inputType, true);
882            // If set, the input type overrides what was set using the deprecated singleLine flag.
883            singleLine = !isMultilineInputType(inputType);
884        } else if (phone) {
885            mInput = DialerKeyListener.getInstance();
886            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
887        } else if (numeric != 0) {
888            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
889                                                   (numeric & DECIMAL) != 0);
890            inputType = EditorInfo.TYPE_CLASS_NUMBER;
891            if ((numeric & SIGNED) != 0) {
892                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
893            }
894            if ((numeric & DECIMAL) != 0) {
895                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
896            }
897            mInputType = inputType;
898        } else if (autotext || autocap != -1) {
899            TextKeyListener.Capitalize cap;
900
901            inputType = EditorInfo.TYPE_CLASS_TEXT;
902
903            switch (autocap) {
904            case 1:
905                cap = TextKeyListener.Capitalize.SENTENCES;
906                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
907                break;
908
909            case 2:
910                cap = TextKeyListener.Capitalize.WORDS;
911                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
912                break;
913
914            case 3:
915                cap = TextKeyListener.Capitalize.CHARACTERS;
916                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
917                break;
918
919            default:
920                cap = TextKeyListener.Capitalize.NONE;
921                break;
922            }
923
924            mInput = TextKeyListener.getInstance(autotext, cap);
925            mInputType = inputType;
926        } else if (mTextIsSelectable) {
927            // Prevent text changes from keyboard.
928            mInputType = EditorInfo.TYPE_NULL;
929            mInput = null;
930            bufferType = BufferType.SPANNABLE;
931            // Required to request focus while in touch mode.
932            setFocusableInTouchMode(true);
933            // So that selection can be changed using arrow keys and touch is handled.
934            setMovementMethod(ArrowKeyMovementMethod.getInstance());
935        } else if (editable) {
936            mInput = TextKeyListener.getInstance();
937            mInputType = EditorInfo.TYPE_CLASS_TEXT;
938        } else {
939            mInput = null;
940
941            switch (buffertype) {
942                case 0:
943                    bufferType = BufferType.NORMAL;
944                    break;
945                case 1:
946                    bufferType = BufferType.SPANNABLE;
947                    break;
948                case 2:
949                    bufferType = BufferType.EDITABLE;
950                    break;
951            }
952        }
953
954        // mInputType has been set from inputType, possibly modified by mInputMethod.
955        // Specialize mInputType to [web]password if we have a text class and the original input
956        // type was a password.
957        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
958            if (password || passwordInputType) {
959                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
960                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
961            }
962            if (webPasswordInputType) {
963                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
964                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
965            }
966        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
967            if (numberPasswordInputType) {
968                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
969                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
970            }
971        }
972
973        if (selectallonfocus) {
974            mSelectAllOnFocus = true;
975
976            if (bufferType == BufferType.NORMAL)
977                bufferType = BufferType.SPANNABLE;
978        }
979
980        setCompoundDrawablesWithIntrinsicBounds(
981            drawableLeft, drawableTop, drawableRight, drawableBottom);
982        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
983        setCompoundDrawablePadding(drawablePadding);
984
985        // Same as setSingleLine(), but make sure the transformation method and the maximum number
986        // of lines of height are unchanged for multi-line TextViews.
987        setInputTypeSingleLine(singleLine);
988        applySingleLine(singleLine, singleLine, singleLine);
989
990        if (singleLine && mInput == null && ellipsize < 0) {
991                ellipsize = 3; // END
992        }
993
994        switch (ellipsize) {
995            case 1:
996                setEllipsize(TextUtils.TruncateAt.START);
997                break;
998            case 2:
999                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1000                break;
1001            case 3:
1002                setEllipsize(TextUtils.TruncateAt.END);
1003                break;
1004            case 4:
1005                setHorizontalFadingEdgeEnabled(
1006                        ViewConfiguration.get(context).isFadingMarqueeEnabled());
1007                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1008                break;
1009        }
1010
1011        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1012        setHintTextColor(textColorHint);
1013        setLinkTextColor(textColorLink);
1014        if (textColorHighlight != 0) {
1015            setHighlightColor(textColorHighlight);
1016        }
1017        setRawTextSize(textSize);
1018
1019        if (allCaps) {
1020            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1021        }
1022
1023        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1024            setTransformationMethod(PasswordTransformationMethod.getInstance());
1025            typefaceIndex = MONOSPACE;
1026        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1027                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1028            typefaceIndex = MONOSPACE;
1029        }
1030
1031        setTypefaceByIndex(typefaceIndex, styleIndex);
1032
1033        if (shadowcolor != 0) {
1034            setShadowLayer(r, dx, dy, shadowcolor);
1035        }
1036
1037        if (maxlength >= 0) {
1038            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1039        } else {
1040            setFilters(NO_FILTERS);
1041        }
1042
1043        setText(text, bufferType);
1044        if (hint != null) setHint(hint);
1045
1046        /*
1047         * Views are not normally focusable unless specified to be.
1048         * However, TextViews that have input or movement methods *are*
1049         * focusable by default.
1050         */
1051        a = context.obtainStyledAttributes(attrs,
1052                                           com.android.internal.R.styleable.View,
1053                                           defStyle, 0);
1054
1055        boolean focusable = mMovement != null || mInput != null;
1056        boolean clickable = focusable;
1057        boolean longClickable = focusable;
1058
1059        n = a.getIndexCount();
1060        for (int i = 0; i < n; i++) {
1061            int attr = a.getIndex(i);
1062
1063            switch (attr) {
1064            case com.android.internal.R.styleable.View_focusable:
1065                focusable = a.getBoolean(attr, focusable);
1066                break;
1067
1068            case com.android.internal.R.styleable.View_clickable:
1069                clickable = a.getBoolean(attr, clickable);
1070                break;
1071
1072            case com.android.internal.R.styleable.View_longClickable:
1073                longClickable = a.getBoolean(attr, longClickable);
1074                break;
1075            }
1076        }
1077        a.recycle();
1078
1079        setFocusable(focusable);
1080        setClickable(clickable);
1081        setLongClickable(longClickable);
1082
1083        prepareCursorControllers();
1084
1085        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1086        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1087        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1088    }
1089
1090    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1091        Typeface tf = null;
1092        switch (typefaceIndex) {
1093            case SANS:
1094                tf = Typeface.SANS_SERIF;
1095                break;
1096
1097            case SERIF:
1098                tf = Typeface.SERIF;
1099                break;
1100
1101            case MONOSPACE:
1102                tf = Typeface.MONOSPACE;
1103                break;
1104        }
1105
1106        setTypeface(tf, styleIndex);
1107    }
1108
1109    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1110        boolean hasRelativeDrawables = (start != null) || (end != null);
1111        if (hasRelativeDrawables) {
1112            Drawables dr = mDrawables;
1113            if (dr == null) {
1114                mDrawables = dr = new Drawables();
1115            }
1116            final Rect compoundRect = dr.mCompoundRect;
1117            int[] state = getDrawableState();
1118            if (start != null) {
1119                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1120                start.setState(state);
1121                start.copyBounds(compoundRect);
1122                start.setCallback(this);
1123
1124                dr.mDrawableStart = start;
1125                dr.mDrawableSizeStart = compoundRect.width();
1126                dr.mDrawableHeightStart = compoundRect.height();
1127            } else {
1128                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1129            }
1130            if (end != null) {
1131                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1132                end.setState(state);
1133                end.copyBounds(compoundRect);
1134                end.setCallback(this);
1135
1136                dr.mDrawableEnd = end;
1137                dr.mDrawableSizeEnd = compoundRect.width();
1138                dr.mDrawableHeightEnd = compoundRect.height();
1139            } else {
1140                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1141            }
1142        }
1143    }
1144
1145    @Override
1146    public void setEnabled(boolean enabled) {
1147        if (enabled == isEnabled()) {
1148            return;
1149        }
1150
1151        if (!enabled) {
1152            // Hide the soft input if the currently active TextView is disabled
1153            InputMethodManager imm = InputMethodManager.peekInstance();
1154            if (imm != null && imm.isActive(this)) {
1155                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1156            }
1157        }
1158        super.setEnabled(enabled);
1159        prepareCursorControllers();
1160    }
1161
1162    /**
1163     * Sets the typeface and style in which the text should be displayed,
1164     * and turns on the fake bold and italic bits in the Paint if the
1165     * Typeface that you provided does not have all the bits in the
1166     * style that you specified.
1167     *
1168     * @attr ref android.R.styleable#TextView_typeface
1169     * @attr ref android.R.styleable#TextView_textStyle
1170     */
1171    public void setTypeface(Typeface tf, int style) {
1172        if (style > 0) {
1173            if (tf == null) {
1174                tf = Typeface.defaultFromStyle(style);
1175            } else {
1176                tf = Typeface.create(tf, style);
1177            }
1178
1179            setTypeface(tf);
1180            // now compute what (if any) algorithmic styling is needed
1181            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1182            int need = style & ~typefaceStyle;
1183            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1184            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1185        } else {
1186            mTextPaint.setFakeBoldText(false);
1187            mTextPaint.setTextSkewX(0);
1188            setTypeface(tf);
1189        }
1190    }
1191
1192    /**
1193     * Subclasses override this to specify that they have a KeyListener
1194     * by default even if not specifically called for in the XML options.
1195     */
1196    protected boolean getDefaultEditable() {
1197        return false;
1198    }
1199
1200    /**
1201     * Subclasses override this to specify a default movement method.
1202     */
1203    protected MovementMethod getDefaultMovementMethod() {
1204        return null;
1205    }
1206
1207    /**
1208     * Return the text the TextView is displaying. If setText() was called with
1209     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1210     * the return value from this method to Spannable or Editable, respectively.
1211     *
1212     * Note: The content of the return value should not be modified. If you want
1213     * a modifiable one, you should make your own copy first.
1214     */
1215    @ViewDebug.CapturedViewProperty
1216    public CharSequence getText() {
1217        return mText;
1218    }
1219
1220    /**
1221     * Returns the length, in characters, of the text managed by this TextView
1222     */
1223    public int length() {
1224        return mText.length();
1225    }
1226
1227    /**
1228     * Return the text the TextView is displaying as an Editable object.  If
1229     * the text is not editable, null is returned.
1230     *
1231     * @see #getText
1232     */
1233    public Editable getEditableText() {
1234        return (mText instanceof Editable) ? (Editable)mText : null;
1235    }
1236
1237    /**
1238     * @return the height of one standard line in pixels.  Note that markup
1239     * within the text can cause individual lines to be taller or shorter
1240     * than this height, and the layout may contain additional first-
1241     * or last-line padding.
1242     */
1243    public int getLineHeight() {
1244        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1245    }
1246
1247    /**
1248     * @return the Layout that is currently being used to display the text.
1249     * This can be null if the text or width has recently changes.
1250     */
1251    public final Layout getLayout() {
1252        return mLayout;
1253    }
1254
1255    /**
1256     * @return the current key listener for this TextView.
1257     * This will frequently be null for non-EditText TextViews.
1258     */
1259    public final KeyListener getKeyListener() {
1260        return mInput;
1261    }
1262
1263    /**
1264     * Sets the key listener to be used with this TextView.  This can be null
1265     * to disallow user input.  Note that this method has significant and
1266     * subtle interactions with soft keyboards and other input method:
1267     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1268     * for important details.  Calling this method will replace the current
1269     * content type of the text view with the content type returned by the
1270     * key listener.
1271     * <p>
1272     * Be warned that if you want a TextView with a key listener or movement
1273     * method not to be focusable, or if you want a TextView without a
1274     * key listener or movement method to be focusable, you must call
1275     * {@link #setFocusable} again after calling this to get the focusability
1276     * back the way you want it.
1277     *
1278     * @attr ref android.R.styleable#TextView_numeric
1279     * @attr ref android.R.styleable#TextView_digits
1280     * @attr ref android.R.styleable#TextView_phoneNumber
1281     * @attr ref android.R.styleable#TextView_inputMethod
1282     * @attr ref android.R.styleable#TextView_capitalize
1283     * @attr ref android.R.styleable#TextView_autoText
1284     */
1285    public void setKeyListener(KeyListener input) {
1286        setKeyListenerOnly(input);
1287        fixFocusableAndClickableSettings();
1288
1289        if (input != null) {
1290            try {
1291                mInputType = mInput.getInputType();
1292            } catch (IncompatibleClassChangeError e) {
1293                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1294            }
1295            // Change inputType, without affecting transformation.
1296            // No need to applySingleLine since mSingleLine is unchanged.
1297            setInputTypeSingleLine(mSingleLine);
1298        } else {
1299            mInputType = EditorInfo.TYPE_NULL;
1300        }
1301
1302        InputMethodManager imm = InputMethodManager.peekInstance();
1303        if (imm != null) imm.restartInput(this);
1304    }
1305
1306    private void setKeyListenerOnly(KeyListener input) {
1307        mInput = input;
1308        if (mInput != null && !(mText instanceof Editable))
1309            setText(mText);
1310
1311        setFilters((Editable) mText, mFilters);
1312    }
1313
1314    /**
1315     * @return the movement method being used for this TextView.
1316     * This will frequently be null for non-EditText TextViews.
1317     */
1318    public final MovementMethod getMovementMethod() {
1319        return mMovement;
1320    }
1321
1322    /**
1323     * Sets the movement method (arrow key handler) to be used for
1324     * this TextView.  This can be null to disallow using the arrow keys
1325     * to move the cursor or scroll the view.
1326     * <p>
1327     * Be warned that if you want a TextView with a key listener or movement
1328     * method not to be focusable, or if you want a TextView without a
1329     * key listener or movement method to be focusable, you must call
1330     * {@link #setFocusable} again after calling this to get the focusability
1331     * back the way you want it.
1332     */
1333    public final void setMovementMethod(MovementMethod movement) {
1334        mMovement = movement;
1335
1336        if (mMovement != null && !(mText instanceof Spannable))
1337            setText(mText);
1338
1339        fixFocusableAndClickableSettings();
1340
1341        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1342        prepareCursorControllers();
1343    }
1344
1345    private void fixFocusableAndClickableSettings() {
1346        if ((mMovement != null) || mInput != null) {
1347            setFocusable(true);
1348            setClickable(true);
1349            setLongClickable(true);
1350        } else {
1351            setFocusable(false);
1352            setClickable(false);
1353            setLongClickable(false);
1354        }
1355    }
1356
1357    /**
1358     * @return the current transformation method for this TextView.
1359     * This will frequently be null except for single-line and password
1360     * fields.
1361     */
1362    public final TransformationMethod getTransformationMethod() {
1363        return mTransformation;
1364    }
1365
1366    /**
1367     * Sets the transformation that is applied to the text that this
1368     * TextView is displaying.
1369     *
1370     * @attr ref android.R.styleable#TextView_password
1371     * @attr ref android.R.styleable#TextView_singleLine
1372     */
1373    public final void setTransformationMethod(TransformationMethod method) {
1374        if (method == mTransformation) {
1375            // Avoid the setText() below if the transformation is
1376            // the same.
1377            return;
1378        }
1379        if (mTransformation != null) {
1380            if (mText instanceof Spannable) {
1381                ((Spannable) mText).removeSpan(mTransformation);
1382            }
1383        }
1384
1385        mTransformation = method;
1386
1387        if (method instanceof TransformationMethod2) {
1388            TransformationMethod2 method2 = (TransformationMethod2) method;
1389            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1390            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1391        } else {
1392            mAllowTransformationLengthChange = false;
1393        }
1394
1395        setText(mText);
1396    }
1397
1398    /**
1399     * Returns the top padding of the view, plus space for the top
1400     * Drawable if any.
1401     */
1402    public int getCompoundPaddingTop() {
1403        final Drawables dr = mDrawables;
1404        if (dr == null || dr.mDrawableTop == null) {
1405            return mPaddingTop;
1406        } else {
1407            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1408        }
1409    }
1410
1411    /**
1412     * Returns the bottom padding of the view, plus space for the bottom
1413     * Drawable if any.
1414     */
1415    public int getCompoundPaddingBottom() {
1416        final Drawables dr = mDrawables;
1417        if (dr == null || dr.mDrawableBottom == null) {
1418            return mPaddingBottom;
1419        } else {
1420            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1421        }
1422    }
1423
1424    /**
1425     * Returns the left padding of the view, plus space for the left
1426     * Drawable if any.
1427     */
1428    public int getCompoundPaddingLeft() {
1429        final Drawables dr = mDrawables;
1430        if (dr == null || dr.mDrawableLeft == null) {
1431            return mPaddingLeft;
1432        } else {
1433            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1434        }
1435    }
1436
1437    /**
1438     * Returns the right padding of the view, plus space for the right
1439     * Drawable if any.
1440     */
1441    public int getCompoundPaddingRight() {
1442        final Drawables dr = mDrawables;
1443        if (dr == null || dr.mDrawableRight == null) {
1444            return mPaddingRight;
1445        } else {
1446            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1447        }
1448    }
1449
1450    /**
1451     * Returns the start padding of the view, plus space for the start
1452     * Drawable if any.
1453     *
1454     * @hide
1455     */
1456    public int getCompoundPaddingStart() {
1457        resolveDrawables();
1458        switch(getResolvedLayoutDirection()) {
1459            default:
1460            case LAYOUT_DIRECTION_LTR:
1461                return getCompoundPaddingLeft();
1462            case LAYOUT_DIRECTION_RTL:
1463                return getCompoundPaddingRight();
1464        }
1465    }
1466
1467    /**
1468     * Returns the end padding of the view, plus space for the end
1469     * Drawable if any.
1470     *
1471     * @hide
1472     */
1473    public int getCompoundPaddingEnd() {
1474        resolveDrawables();
1475        switch(getResolvedLayoutDirection()) {
1476            default:
1477            case LAYOUT_DIRECTION_LTR:
1478                return getCompoundPaddingRight();
1479            case LAYOUT_DIRECTION_RTL:
1480                return getCompoundPaddingLeft();
1481        }
1482    }
1483
1484    /**
1485     * Returns the extended top padding of the view, including both the
1486     * top Drawable if any and any extra space to keep more than maxLines
1487     * of text from showing.  It is only valid to call this after measuring.
1488     */
1489    public int getExtendedPaddingTop() {
1490        if (mMaxMode != LINES) {
1491            return getCompoundPaddingTop();
1492        }
1493
1494        if (mLayout.getLineCount() <= mMaximum) {
1495            return getCompoundPaddingTop();
1496        }
1497
1498        int top = getCompoundPaddingTop();
1499        int bottom = getCompoundPaddingBottom();
1500        int viewht = getHeight() - top - bottom;
1501        int layoutht = mLayout.getLineTop(mMaximum);
1502
1503        if (layoutht >= viewht) {
1504            return top;
1505        }
1506
1507        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1508        if (gravity == Gravity.TOP) {
1509            return top;
1510        } else if (gravity == Gravity.BOTTOM) {
1511            return top + viewht - layoutht;
1512        } else { // (gravity == Gravity.CENTER_VERTICAL)
1513            return top + (viewht - layoutht) / 2;
1514        }
1515    }
1516
1517    /**
1518     * Returns the extended bottom padding of the view, including both the
1519     * bottom Drawable if any and any extra space to keep more than maxLines
1520     * of text from showing.  It is only valid to call this after measuring.
1521     */
1522    public int getExtendedPaddingBottom() {
1523        if (mMaxMode != LINES) {
1524            return getCompoundPaddingBottom();
1525        }
1526
1527        if (mLayout.getLineCount() <= mMaximum) {
1528            return getCompoundPaddingBottom();
1529        }
1530
1531        int top = getCompoundPaddingTop();
1532        int bottom = getCompoundPaddingBottom();
1533        int viewht = getHeight() - top - bottom;
1534        int layoutht = mLayout.getLineTop(mMaximum);
1535
1536        if (layoutht >= viewht) {
1537            return bottom;
1538        }
1539
1540        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1541        if (gravity == Gravity.TOP) {
1542            return bottom + viewht - layoutht;
1543        } else if (gravity == Gravity.BOTTOM) {
1544            return bottom;
1545        } else { // (gravity == Gravity.CENTER_VERTICAL)
1546            return bottom + (viewht - layoutht) / 2;
1547        }
1548    }
1549
1550    /**
1551     * Returns the total left padding of the view, including the left
1552     * Drawable if any.
1553     */
1554    public int getTotalPaddingLeft() {
1555        return getCompoundPaddingLeft();
1556    }
1557
1558    /**
1559     * Returns the total right padding of the view, including the right
1560     * Drawable if any.
1561     */
1562    public int getTotalPaddingRight() {
1563        return getCompoundPaddingRight();
1564    }
1565
1566    /**
1567     * Returns the total start padding of the view, including the start
1568     * Drawable if any.
1569     *
1570     * @hide
1571     */
1572    public int getTotalPaddingStart() {
1573        return getCompoundPaddingStart();
1574    }
1575
1576    /**
1577     * Returns the total end padding of the view, including the end
1578     * Drawable if any.
1579     *
1580     * @hide
1581     */
1582    public int getTotalPaddingEnd() {
1583        return getCompoundPaddingEnd();
1584    }
1585
1586    /**
1587     * Returns the total top padding of the view, including the top
1588     * Drawable if any, the extra space to keep more than maxLines
1589     * from showing, and the vertical offset for gravity, if any.
1590     */
1591    public int getTotalPaddingTop() {
1592        return getExtendedPaddingTop() + getVerticalOffset(true);
1593    }
1594
1595    /**
1596     * Returns the total bottom padding of the view, including the bottom
1597     * Drawable if any, the extra space to keep more than maxLines
1598     * from showing, and the vertical offset for gravity, if any.
1599     */
1600    public int getTotalPaddingBottom() {
1601        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1602    }
1603
1604    /**
1605     * Sets the Drawables (if any) to appear to the left of, above,
1606     * to the right of, and below the text.  Use null if you do not
1607     * want a Drawable there.  The Drawables must already have had
1608     * {@link Drawable#setBounds} called.
1609     *
1610     * @attr ref android.R.styleable#TextView_drawableLeft
1611     * @attr ref android.R.styleable#TextView_drawableTop
1612     * @attr ref android.R.styleable#TextView_drawableRight
1613     * @attr ref android.R.styleable#TextView_drawableBottom
1614     */
1615    public void setCompoundDrawables(Drawable left, Drawable top,
1616                                     Drawable right, Drawable bottom) {
1617        Drawables dr = mDrawables;
1618
1619        final boolean drawables = left != null || top != null
1620                || right != null || bottom != null;
1621
1622        if (!drawables) {
1623            // Clearing drawables...  can we free the data structure?
1624            if (dr != null) {
1625                if (dr.mDrawablePadding == 0) {
1626                    mDrawables = null;
1627                } else {
1628                    // We need to retain the last set padding, so just clear
1629                    // out all of the fields in the existing structure.
1630                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1631                    dr.mDrawableLeft = null;
1632                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1633                    dr.mDrawableTop = null;
1634                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1635                    dr.mDrawableRight = null;
1636                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1637                    dr.mDrawableBottom = null;
1638                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1639                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1640                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1641                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1642                }
1643            }
1644        } else {
1645            if (dr == null) {
1646                mDrawables = dr = new Drawables();
1647            }
1648
1649            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1650                dr.mDrawableLeft.setCallback(null);
1651            }
1652            dr.mDrawableLeft = left;
1653
1654            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1655                dr.mDrawableTop.setCallback(null);
1656            }
1657            dr.mDrawableTop = top;
1658
1659            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1660                dr.mDrawableRight.setCallback(null);
1661            }
1662            dr.mDrawableRight = right;
1663
1664            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1665                dr.mDrawableBottom.setCallback(null);
1666            }
1667            dr.mDrawableBottom = bottom;
1668
1669            final Rect compoundRect = dr.mCompoundRect;
1670            int[] state;
1671
1672            state = getDrawableState();
1673
1674            if (left != null) {
1675                left.setState(state);
1676                left.copyBounds(compoundRect);
1677                left.setCallback(this);
1678                dr.mDrawableSizeLeft = compoundRect.width();
1679                dr.mDrawableHeightLeft = compoundRect.height();
1680            } else {
1681                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1682            }
1683
1684            if (right != null) {
1685                right.setState(state);
1686                right.copyBounds(compoundRect);
1687                right.setCallback(this);
1688                dr.mDrawableSizeRight = compoundRect.width();
1689                dr.mDrawableHeightRight = compoundRect.height();
1690            } else {
1691                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1692            }
1693
1694            if (top != null) {
1695                top.setState(state);
1696                top.copyBounds(compoundRect);
1697                top.setCallback(this);
1698                dr.mDrawableSizeTop = compoundRect.height();
1699                dr.mDrawableWidthTop = compoundRect.width();
1700            } else {
1701                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1702            }
1703
1704            if (bottom != null) {
1705                bottom.setState(state);
1706                bottom.copyBounds(compoundRect);
1707                bottom.setCallback(this);
1708                dr.mDrawableSizeBottom = compoundRect.height();
1709                dr.mDrawableWidthBottom = compoundRect.width();
1710            } else {
1711                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1712            }
1713        }
1714
1715        invalidate();
1716        requestLayout();
1717    }
1718
1719    /**
1720     * Sets the Drawables (if any) to appear to the left of, above,
1721     * to the right of, and below the text.  Use 0 if you do not
1722     * want a Drawable there. The Drawables' bounds will be set to
1723     * their intrinsic bounds.
1724     *
1725     * @param left Resource identifier of the left Drawable.
1726     * @param top Resource identifier of the top Drawable.
1727     * @param right Resource identifier of the right Drawable.
1728     * @param bottom Resource identifier of the bottom Drawable.
1729     *
1730     * @attr ref android.R.styleable#TextView_drawableLeft
1731     * @attr ref android.R.styleable#TextView_drawableTop
1732     * @attr ref android.R.styleable#TextView_drawableRight
1733     * @attr ref android.R.styleable#TextView_drawableBottom
1734     */
1735    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1736        final Resources resources = getContext().getResources();
1737        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1738                top != 0 ? resources.getDrawable(top) : null,
1739                right != 0 ? resources.getDrawable(right) : null,
1740                bottom != 0 ? resources.getDrawable(bottom) : null);
1741    }
1742
1743    /**
1744     * Sets the Drawables (if any) to appear to the left of, above,
1745     * to the right of, and below the text.  Use null if you do not
1746     * want a Drawable there. The Drawables' bounds will be set to
1747     * their intrinsic bounds.
1748     *
1749     * @attr ref android.R.styleable#TextView_drawableLeft
1750     * @attr ref android.R.styleable#TextView_drawableTop
1751     * @attr ref android.R.styleable#TextView_drawableRight
1752     * @attr ref android.R.styleable#TextView_drawableBottom
1753     */
1754    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1755            Drawable right, Drawable bottom) {
1756
1757        if (left != null) {
1758            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1759        }
1760        if (right != null) {
1761            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1762        }
1763        if (top != null) {
1764            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1765        }
1766        if (bottom != null) {
1767            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1768        }
1769        setCompoundDrawables(left, top, right, bottom);
1770    }
1771
1772    /**
1773     * Sets the Drawables (if any) to appear to the start of, above,
1774     * to the end of, and below the text.  Use null if you do not
1775     * want a Drawable there.  The Drawables must already have had
1776     * {@link Drawable#setBounds} called.
1777     *
1778     * @attr ref android.R.styleable#TextView_drawableStart
1779     * @attr ref android.R.styleable#TextView_drawableTop
1780     * @attr ref android.R.styleable#TextView_drawableEnd
1781     * @attr ref android.R.styleable#TextView_drawableBottom
1782     *
1783     * @hide
1784     */
1785    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1786                                     Drawable end, Drawable bottom) {
1787        Drawables dr = mDrawables;
1788
1789        final boolean drawables = start != null || top != null
1790                || end != null || bottom != null;
1791
1792        if (!drawables) {
1793            // Clearing drawables...  can we free the data structure?
1794            if (dr != null) {
1795                if (dr.mDrawablePadding == 0) {
1796                    mDrawables = null;
1797                } else {
1798                    // We need to retain the last set padding, so just clear
1799                    // out all of the fields in the existing structure.
1800                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1801                    dr.mDrawableStart = null;
1802                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1803                    dr.mDrawableTop = null;
1804                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1805                    dr.mDrawableEnd = null;
1806                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1807                    dr.mDrawableBottom = null;
1808                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1809                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1810                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1811                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1812                }
1813            }
1814        } else {
1815            if (dr == null) {
1816                mDrawables = dr = new Drawables();
1817            }
1818
1819            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1820                dr.mDrawableStart.setCallback(null);
1821            }
1822            dr.mDrawableStart = start;
1823
1824            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1825                dr.mDrawableTop.setCallback(null);
1826            }
1827            dr.mDrawableTop = top;
1828
1829            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1830                dr.mDrawableEnd.setCallback(null);
1831            }
1832            dr.mDrawableEnd = end;
1833
1834            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1835                dr.mDrawableBottom.setCallback(null);
1836            }
1837            dr.mDrawableBottom = bottom;
1838
1839            final Rect compoundRect = dr.mCompoundRect;
1840            int[] state;
1841
1842            state = getDrawableState();
1843
1844            if (start != null) {
1845                start.setState(state);
1846                start.copyBounds(compoundRect);
1847                start.setCallback(this);
1848                dr.mDrawableSizeStart = compoundRect.width();
1849                dr.mDrawableHeightStart = compoundRect.height();
1850            } else {
1851                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1852            }
1853
1854            if (end != null) {
1855                end.setState(state);
1856                end.copyBounds(compoundRect);
1857                end.setCallback(this);
1858                dr.mDrawableSizeEnd = compoundRect.width();
1859                dr.mDrawableHeightEnd = compoundRect.height();
1860            } else {
1861                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1862            }
1863
1864            if (top != null) {
1865                top.setState(state);
1866                top.copyBounds(compoundRect);
1867                top.setCallback(this);
1868                dr.mDrawableSizeTop = compoundRect.height();
1869                dr.mDrawableWidthTop = compoundRect.width();
1870            } else {
1871                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1872            }
1873
1874            if (bottom != null) {
1875                bottom.setState(state);
1876                bottom.copyBounds(compoundRect);
1877                bottom.setCallback(this);
1878                dr.mDrawableSizeBottom = compoundRect.height();
1879                dr.mDrawableWidthBottom = compoundRect.width();
1880            } else {
1881                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1882            }
1883        }
1884
1885        resolveDrawables();
1886        invalidate();
1887        requestLayout();
1888    }
1889
1890    /**
1891     * Sets the Drawables (if any) to appear to the start of, above,
1892     * to the end of, and below the text.  Use 0 if you do not
1893     * want a Drawable there. The Drawables' bounds will be set to
1894     * their intrinsic bounds.
1895     *
1896     * @param start Resource identifier of the start Drawable.
1897     * @param top Resource identifier of the top Drawable.
1898     * @param end Resource identifier of the end Drawable.
1899     * @param bottom Resource identifier of the bottom Drawable.
1900     *
1901     * @attr ref android.R.styleable#TextView_drawableStart
1902     * @attr ref android.R.styleable#TextView_drawableTop
1903     * @attr ref android.R.styleable#TextView_drawableEnd
1904     * @attr ref android.R.styleable#TextView_drawableBottom
1905     *
1906     * @hide
1907     */
1908    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1909            int bottom) {
1910        resetResolvedDrawables();
1911        final Resources resources = getContext().getResources();
1912        setCompoundDrawablesRelativeWithIntrinsicBounds(
1913                start != 0 ? resources.getDrawable(start) : null,
1914                top != 0 ? resources.getDrawable(top) : null,
1915                end != 0 ? resources.getDrawable(end) : null,
1916                bottom != 0 ? resources.getDrawable(bottom) : null);
1917    }
1918
1919    /**
1920     * Sets the Drawables (if any) to appear to the start of, above,
1921     * to the end of, and below the text.  Use null if you do not
1922     * want a Drawable there. The Drawables' bounds will be set to
1923     * their intrinsic bounds.
1924     *
1925     * @attr ref android.R.styleable#TextView_drawableStart
1926     * @attr ref android.R.styleable#TextView_drawableTop
1927     * @attr ref android.R.styleable#TextView_drawableEnd
1928     * @attr ref android.R.styleable#TextView_drawableBottom
1929     *
1930     * @hide
1931     */
1932    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1933            Drawable end, Drawable bottom) {
1934
1935        resetResolvedDrawables();
1936        if (start != null) {
1937            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1938        }
1939        if (end != null) {
1940            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1941        }
1942        if (top != null) {
1943            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1944        }
1945        if (bottom != null) {
1946            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1947        }
1948        setCompoundDrawablesRelative(start, top, end, bottom);
1949    }
1950
1951    /**
1952     * Returns drawables for the left, top, right, and bottom borders.
1953     */
1954    public Drawable[] getCompoundDrawables() {
1955        final Drawables dr = mDrawables;
1956        if (dr != null) {
1957            return new Drawable[] {
1958                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1959            };
1960        } else {
1961            return new Drawable[] { null, null, null, null };
1962        }
1963    }
1964
1965    /**
1966     * Returns drawables for the start, top, end, and bottom borders.
1967     *
1968     * @hide
1969     */
1970    public Drawable[] getCompoundDrawablesRelative() {
1971        final Drawables dr = mDrawables;
1972        if (dr != null) {
1973            return new Drawable[] {
1974                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
1975            };
1976        } else {
1977            return new Drawable[] { null, null, null, null };
1978        }
1979    }
1980
1981    /**
1982     * Sets the size of the padding between the compound drawables and
1983     * the text.
1984     *
1985     * @attr ref android.R.styleable#TextView_drawablePadding
1986     */
1987    public void setCompoundDrawablePadding(int pad) {
1988        Drawables dr = mDrawables;
1989        if (pad == 0) {
1990            if (dr != null) {
1991                dr.mDrawablePadding = pad;
1992            }
1993        } else {
1994            if (dr == null) {
1995                mDrawables = dr = new Drawables();
1996            }
1997            dr.mDrawablePadding = pad;
1998        }
1999
2000        invalidate();
2001        requestLayout();
2002    }
2003
2004    /**
2005     * Returns the padding between the compound drawables and the text.
2006     */
2007    public int getCompoundDrawablePadding() {
2008        final Drawables dr = mDrawables;
2009        return dr != null ? dr.mDrawablePadding : 0;
2010    }
2011
2012    @Override
2013    public void setPadding(int left, int top, int right, int bottom) {
2014        if (left != mPaddingLeft ||
2015            right != mPaddingRight ||
2016            top != mPaddingTop ||
2017            bottom != mPaddingBottom) {
2018            nullLayouts();
2019        }
2020
2021        // the super call will requestLayout()
2022        super.setPadding(left, top, right, bottom);
2023        invalidate();
2024    }
2025
2026    /**
2027     * Gets the autolink mask of the text.  See {@link
2028     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2029     * possible values.
2030     *
2031     * @attr ref android.R.styleable#TextView_autoLink
2032     */
2033    public final int getAutoLinkMask() {
2034        return mAutoLinkMask;
2035    }
2036
2037    /**
2038     * Sets the text color, size, style, hint color, and highlight color
2039     * from the specified TextAppearance resource.
2040     */
2041    public void setTextAppearance(Context context, int resid) {
2042        TypedArray appearance =
2043            context.obtainStyledAttributes(resid,
2044                                           com.android.internal.R.styleable.TextAppearance);
2045
2046        int color;
2047        ColorStateList colors;
2048        int ts;
2049
2050        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2051        if (color != 0) {
2052            setHighlightColor(color);
2053        }
2054
2055        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2056                                              TextAppearance_textColor);
2057        if (colors != null) {
2058            setTextColor(colors);
2059        }
2060
2061        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2062                                              TextAppearance_textSize, 0);
2063        if (ts != 0) {
2064            setRawTextSize(ts);
2065        }
2066
2067        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2068                                              TextAppearance_textColorHint);
2069        if (colors != null) {
2070            setHintTextColor(colors);
2071        }
2072
2073        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2074                                              TextAppearance_textColorLink);
2075        if (colors != null) {
2076            setLinkTextColor(colors);
2077        }
2078
2079        int typefaceIndex, styleIndex;
2080
2081        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2082                                          TextAppearance_typeface, -1);
2083        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2084                                       TextAppearance_textStyle, -1);
2085
2086        setTypefaceByIndex(typefaceIndex, styleIndex);
2087
2088        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2089                false)) {
2090            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2091        }
2092
2093        appearance.recycle();
2094    }
2095
2096    /**
2097     * @return the size (in pixels) of the default text size in this TextView.
2098     */
2099    public float getTextSize() {
2100        return mTextPaint.getTextSize();
2101    }
2102
2103    /**
2104     * Set the default text size to the given value, interpreted as "scaled
2105     * pixel" units.  This size is adjusted based on the current density and
2106     * user font size preference.
2107     *
2108     * @param size The scaled pixel size.
2109     *
2110     * @attr ref android.R.styleable#TextView_textSize
2111     */
2112    @android.view.RemotableViewMethod
2113    public void setTextSize(float size) {
2114        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2115    }
2116
2117    /**
2118     * Set the default text size to a given unit and value.  See {@link
2119     * TypedValue} for the possible dimension units.
2120     *
2121     * @param unit The desired dimension unit.
2122     * @param size The desired size in the given units.
2123     *
2124     * @attr ref android.R.styleable#TextView_textSize
2125     */
2126    public void setTextSize(int unit, float size) {
2127        Context c = getContext();
2128        Resources r;
2129
2130        if (c == null)
2131            r = Resources.getSystem();
2132        else
2133            r = c.getResources();
2134
2135        setRawTextSize(TypedValue.applyDimension(
2136            unit, size, r.getDisplayMetrics()));
2137    }
2138
2139    private void setRawTextSize(float size) {
2140        if (size != mTextPaint.getTextSize()) {
2141            mTextPaint.setTextSize(size);
2142
2143            if (mLayout != null) {
2144                nullLayouts();
2145                requestLayout();
2146                invalidate();
2147            }
2148        }
2149    }
2150
2151    /**
2152     * @return the extent by which text is currently being stretched
2153     * horizontally.  This will usually be 1.
2154     */
2155    public float getTextScaleX() {
2156        return mTextPaint.getTextScaleX();
2157    }
2158
2159    /**
2160     * Sets the extent by which text should be stretched horizontally.
2161     *
2162     * @attr ref android.R.styleable#TextView_textScaleX
2163     */
2164    @android.view.RemotableViewMethod
2165    public void setTextScaleX(float size) {
2166        if (size != mTextPaint.getTextScaleX()) {
2167            mUserSetTextScaleX = true;
2168            mTextPaint.setTextScaleX(size);
2169
2170            if (mLayout != null) {
2171                nullLayouts();
2172                requestLayout();
2173                invalidate();
2174            }
2175        }
2176    }
2177
2178    /**
2179     * Sets the typeface and style in which the text should be displayed.
2180     * Note that not all Typeface families actually have bold and italic
2181     * variants, so you may need to use
2182     * {@link #setTypeface(Typeface, int)} to get the appearance
2183     * that you actually want.
2184     *
2185     * @attr ref android.R.styleable#TextView_typeface
2186     * @attr ref android.R.styleable#TextView_textStyle
2187     */
2188    public void setTypeface(Typeface tf) {
2189        if (mTextPaint.getTypeface() != tf) {
2190            mTextPaint.setTypeface(tf);
2191
2192            if (mLayout != null) {
2193                nullLayouts();
2194                requestLayout();
2195                invalidate();
2196            }
2197        }
2198    }
2199
2200    /**
2201     * @return the current typeface and style in which the text is being
2202     * displayed.
2203     */
2204    public Typeface getTypeface() {
2205        return mTextPaint.getTypeface();
2206    }
2207
2208    /**
2209     * Sets the text color for all the states (normal, selected,
2210     * focused) to be this color.
2211     *
2212     * @attr ref android.R.styleable#TextView_textColor
2213     */
2214    @android.view.RemotableViewMethod
2215    public void setTextColor(int color) {
2216        mTextColor = ColorStateList.valueOf(color);
2217        updateTextColors();
2218    }
2219
2220    /**
2221     * Sets the text color.
2222     *
2223     * @attr ref android.R.styleable#TextView_textColor
2224     */
2225    public void setTextColor(ColorStateList colors) {
2226        if (colors == null) {
2227            throw new NullPointerException();
2228        }
2229
2230        mTextColor = colors;
2231        updateTextColors();
2232    }
2233
2234    /**
2235     * Return the set of text colors.
2236     *
2237     * @return Returns the set of text colors.
2238     */
2239    public final ColorStateList getTextColors() {
2240        return mTextColor;
2241    }
2242
2243    /**
2244     * <p>Return the current color selected for normal text.</p>
2245     *
2246     * @return Returns the current text color.
2247     */
2248    public final int getCurrentTextColor() {
2249        return mCurTextColor;
2250    }
2251
2252    /**
2253     * Sets the color used to display the selection highlight.
2254     *
2255     * @attr ref android.R.styleable#TextView_textColorHighlight
2256     */
2257    @android.view.RemotableViewMethod
2258    public void setHighlightColor(int color) {
2259        if (mHighlightColor != color) {
2260            mHighlightColor = color;
2261            invalidate();
2262        }
2263    }
2264
2265    /**
2266     * Gives the text a shadow of the specified radius and color, the specified
2267     * distance from its normal position.
2268     *
2269     * @attr ref android.R.styleable#TextView_shadowColor
2270     * @attr ref android.R.styleable#TextView_shadowDx
2271     * @attr ref android.R.styleable#TextView_shadowDy
2272     * @attr ref android.R.styleable#TextView_shadowRadius
2273     */
2274    public void setShadowLayer(float radius, float dx, float dy, int color) {
2275        mTextPaint.setShadowLayer(radius, dx, dy, color);
2276
2277        mShadowRadius = radius;
2278        mShadowDx = dx;
2279        mShadowDy = dy;
2280
2281        invalidate();
2282    }
2283
2284    /**
2285     * @return the base paint used for the text.  Please use this only to
2286     * consult the Paint's properties and not to change them.
2287     */
2288    public TextPaint getPaint() {
2289        return mTextPaint;
2290    }
2291
2292    /**
2293     * Sets the autolink mask of the text.  See {@link
2294     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2295     * possible values.
2296     *
2297     * @attr ref android.R.styleable#TextView_autoLink
2298     */
2299    @android.view.RemotableViewMethod
2300    public final void setAutoLinkMask(int mask) {
2301        mAutoLinkMask = mask;
2302    }
2303
2304    /**
2305     * Sets whether the movement method will automatically be set to
2306     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2307     * set to nonzero and links are detected in {@link #setText}.
2308     * The default is true.
2309     *
2310     * @attr ref android.R.styleable#TextView_linksClickable
2311     */
2312    @android.view.RemotableViewMethod
2313    public final void setLinksClickable(boolean whether) {
2314        mLinksClickable = whether;
2315    }
2316
2317    /**
2318     * Returns whether the movement method will automatically be set to
2319     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2320     * set to nonzero and links are detected in {@link #setText}.
2321     * The default is true.
2322     *
2323     * @attr ref android.R.styleable#TextView_linksClickable
2324     */
2325    public final boolean getLinksClickable() {
2326        return mLinksClickable;
2327    }
2328
2329    /**
2330     * Returns the list of URLSpans attached to the text
2331     * (by {@link Linkify} or otherwise) if any.  You can call
2332     * {@link URLSpan#getURL} on them to find where they link to
2333     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2334     * to find the region of the text they are attached to.
2335     */
2336    public URLSpan[] getUrls() {
2337        if (mText instanceof Spanned) {
2338            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2339        } else {
2340            return new URLSpan[0];
2341        }
2342    }
2343
2344    /**
2345     * Sets the color of the hint text.
2346     *
2347     * @attr ref android.R.styleable#TextView_textColorHint
2348     */
2349    @android.view.RemotableViewMethod
2350    public final void setHintTextColor(int color) {
2351        mHintTextColor = ColorStateList.valueOf(color);
2352        updateTextColors();
2353    }
2354
2355    /**
2356     * Sets the color of the hint text.
2357     *
2358     * @attr ref android.R.styleable#TextView_textColorHint
2359     */
2360    public final void setHintTextColor(ColorStateList colors) {
2361        mHintTextColor = colors;
2362        updateTextColors();
2363    }
2364
2365    /**
2366     * <p>Return the color used to paint the hint text.</p>
2367     *
2368     * @return Returns the list of hint text colors.
2369     */
2370    public final ColorStateList getHintTextColors() {
2371        return mHintTextColor;
2372    }
2373
2374    /**
2375     * <p>Return the current color selected to paint the hint text.</p>
2376     *
2377     * @return Returns the current hint text color.
2378     */
2379    public final int getCurrentHintTextColor() {
2380        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2381    }
2382
2383    /**
2384     * Sets the color of links in the text.
2385     *
2386     * @attr ref android.R.styleable#TextView_textColorLink
2387     */
2388    @android.view.RemotableViewMethod
2389    public final void setLinkTextColor(int color) {
2390        mLinkTextColor = ColorStateList.valueOf(color);
2391        updateTextColors();
2392    }
2393
2394    /**
2395     * Sets the color of links in the text.
2396     *
2397     * @attr ref android.R.styleable#TextView_textColorLink
2398     */
2399    public final void setLinkTextColor(ColorStateList colors) {
2400        mLinkTextColor = colors;
2401        updateTextColors();
2402    }
2403
2404    /**
2405     * <p>Returns the color used to paint links in the text.</p>
2406     *
2407     * @return Returns the list of link text colors.
2408     */
2409    public final ColorStateList getLinkTextColors() {
2410        return mLinkTextColor;
2411    }
2412
2413    /**
2414     * Sets the horizontal alignment of the text and the
2415     * vertical gravity that will be used when there is extra space
2416     * in the TextView beyond what is required for the text itself.
2417     *
2418     * @see android.view.Gravity
2419     * @attr ref android.R.styleable#TextView_gravity
2420     */
2421    public void setGravity(int gravity) {
2422        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2423            gravity |= Gravity.START;
2424        }
2425        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2426            gravity |= Gravity.TOP;
2427        }
2428
2429        boolean newLayout = false;
2430
2431        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2432            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2433            newLayout = true;
2434        }
2435
2436        if (gravity != mGravity) {
2437            invalidate();
2438        }
2439
2440        mGravity = gravity;
2441
2442        if (mLayout != null && newLayout) {
2443            // XXX this is heavy-handed because no actual content changes.
2444            int want = mLayout.getWidth();
2445            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2446
2447            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2448                          mRight - mLeft - getCompoundPaddingLeft() -
2449                          getCompoundPaddingRight(), true);
2450        }
2451    }
2452
2453    /**
2454     * Returns the horizontal and vertical alignment of this TextView.
2455     *
2456     * @see android.view.Gravity
2457     * @attr ref android.R.styleable#TextView_gravity
2458     */
2459    public int getGravity() {
2460        return mGravity;
2461    }
2462
2463    /**
2464     * @return the flags on the Paint being used to display the text.
2465     * @see Paint#getFlags
2466     */
2467    public int getPaintFlags() {
2468        return mTextPaint.getFlags();
2469    }
2470
2471    /**
2472     * Sets flags on the Paint being used to display the text and
2473     * reflows the text if they are different from the old flags.
2474     * @see Paint#setFlags
2475     */
2476    @android.view.RemotableViewMethod
2477    public void setPaintFlags(int flags) {
2478        if (mTextPaint.getFlags() != flags) {
2479            mTextPaint.setFlags(flags);
2480
2481            if (mLayout != null) {
2482                nullLayouts();
2483                requestLayout();
2484                invalidate();
2485            }
2486        }
2487    }
2488
2489    /**
2490     * Sets whether the text should be allowed to be wider than the
2491     * View is.  If false, it will be wrapped to the width of the View.
2492     *
2493     * @attr ref android.R.styleable#TextView_scrollHorizontally
2494     */
2495    public void setHorizontallyScrolling(boolean whether) {
2496        mHorizontallyScrolling = whether;
2497
2498        if (mLayout != null) {
2499            nullLayouts();
2500            requestLayout();
2501            invalidate();
2502        }
2503    }
2504
2505    /**
2506     * Makes the TextView at least this many lines tall.
2507     *
2508     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2509     * set this value to 1.
2510     *
2511     * @attr ref android.R.styleable#TextView_minLines
2512     */
2513    @android.view.RemotableViewMethod
2514    public void setMinLines(int minlines) {
2515        mMinimum = minlines;
2516        mMinMode = LINES;
2517
2518        requestLayout();
2519        invalidate();
2520    }
2521
2522    /**
2523     * Makes the TextView at least this many pixels tall.
2524     *
2525     * Setting this value overrides any other (minimum) number of lines setting.
2526     *
2527     * @attr ref android.R.styleable#TextView_minHeight
2528     */
2529    @android.view.RemotableViewMethod
2530    public void setMinHeight(int minHeight) {
2531        mMinimum = minHeight;
2532        mMinMode = PIXELS;
2533
2534        requestLayout();
2535        invalidate();
2536    }
2537
2538    /**
2539     * Makes the TextView at most this many lines tall.
2540     *
2541     * Setting this value overrides any other (maximum) height setting.
2542     *
2543     * @attr ref android.R.styleable#TextView_maxLines
2544     */
2545    @android.view.RemotableViewMethod
2546    public void setMaxLines(int maxlines) {
2547        mMaximum = maxlines;
2548        mMaxMode = LINES;
2549
2550        requestLayout();
2551        invalidate();
2552    }
2553
2554    /**
2555     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2556     * {@link #setMaxLines(int)} method.
2557     *
2558     * Setting this value overrides any other (maximum) number of lines setting.
2559     *
2560     * @attr ref android.R.styleable#TextView_maxHeight
2561     */
2562    @android.view.RemotableViewMethod
2563    public void setMaxHeight(int maxHeight) {
2564        mMaximum = maxHeight;
2565        mMaxMode = PIXELS;
2566
2567        requestLayout();
2568        invalidate();
2569    }
2570
2571    /**
2572     * Makes the TextView exactly this many lines tall.
2573     *
2574     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2575     * height setting. A single line TextView will set this value to 1.
2576     *
2577     * @attr ref android.R.styleable#TextView_lines
2578     */
2579    @android.view.RemotableViewMethod
2580    public void setLines(int lines) {
2581        mMaximum = mMinimum = lines;
2582        mMaxMode = mMinMode = LINES;
2583
2584        requestLayout();
2585        invalidate();
2586    }
2587
2588    /**
2589     * Makes the TextView exactly this many pixels tall.
2590     * You could do the same thing by specifying this number in the
2591     * LayoutParams.
2592     *
2593     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2594     * height setting.
2595     *
2596     * @attr ref android.R.styleable#TextView_height
2597     */
2598    @android.view.RemotableViewMethod
2599    public void setHeight(int pixels) {
2600        mMaximum = mMinimum = pixels;
2601        mMaxMode = mMinMode = PIXELS;
2602
2603        requestLayout();
2604        invalidate();
2605    }
2606
2607    /**
2608     * Makes the TextView at least this many ems wide
2609     *
2610     * @attr ref android.R.styleable#TextView_minEms
2611     */
2612    @android.view.RemotableViewMethod
2613    public void setMinEms(int minems) {
2614        mMinWidth = minems;
2615        mMinWidthMode = EMS;
2616
2617        requestLayout();
2618        invalidate();
2619    }
2620
2621    /**
2622     * Makes the TextView at least this many pixels wide
2623     *
2624     * @attr ref android.R.styleable#TextView_minWidth
2625     */
2626    @android.view.RemotableViewMethod
2627    public void setMinWidth(int minpixels) {
2628        mMinWidth = minpixels;
2629        mMinWidthMode = PIXELS;
2630
2631        requestLayout();
2632        invalidate();
2633    }
2634
2635    /**
2636     * Makes the TextView at most this many ems wide
2637     *
2638     * @attr ref android.R.styleable#TextView_maxEms
2639     */
2640    @android.view.RemotableViewMethod
2641    public void setMaxEms(int maxems) {
2642        mMaxWidth = maxems;
2643        mMaxWidthMode = EMS;
2644
2645        requestLayout();
2646        invalidate();
2647    }
2648
2649    /**
2650     * Makes the TextView at most this many pixels wide
2651     *
2652     * @attr ref android.R.styleable#TextView_maxWidth
2653     */
2654    @android.view.RemotableViewMethod
2655    public void setMaxWidth(int maxpixels) {
2656        mMaxWidth = maxpixels;
2657        mMaxWidthMode = PIXELS;
2658
2659        requestLayout();
2660        invalidate();
2661    }
2662
2663    /**
2664     * Makes the TextView exactly this many ems wide
2665     *
2666     * @attr ref android.R.styleable#TextView_ems
2667     */
2668    @android.view.RemotableViewMethod
2669    public void setEms(int ems) {
2670        mMaxWidth = mMinWidth = ems;
2671        mMaxWidthMode = mMinWidthMode = EMS;
2672
2673        requestLayout();
2674        invalidate();
2675    }
2676
2677    /**
2678     * Makes the TextView exactly this many pixels wide.
2679     * You could do the same thing by specifying this number in the
2680     * LayoutParams.
2681     *
2682     * @attr ref android.R.styleable#TextView_width
2683     */
2684    @android.view.RemotableViewMethod
2685    public void setWidth(int pixels) {
2686        mMaxWidth = mMinWidth = pixels;
2687        mMaxWidthMode = mMinWidthMode = PIXELS;
2688
2689        requestLayout();
2690        invalidate();
2691    }
2692
2693
2694    /**
2695     * Sets line spacing for this TextView.  Each line will have its height
2696     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2697     *
2698     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2699     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2700     */
2701    public void setLineSpacing(float add, float mult) {
2702        mSpacingMult = mult;
2703        mSpacingAdd = add;
2704
2705        if (mLayout != null) {
2706            nullLayouts();
2707            requestLayout();
2708            invalidate();
2709        }
2710    }
2711
2712    /**
2713     * Convenience method: Append the specified text to the TextView's
2714     * display buffer, upgrading it to BufferType.EDITABLE if it was
2715     * not already editable.
2716     */
2717    public final void append(CharSequence text) {
2718        append(text, 0, text.length());
2719    }
2720
2721    /**
2722     * Convenience method: Append the specified text slice to the TextView's
2723     * display buffer, upgrading it to BufferType.EDITABLE if it was
2724     * not already editable.
2725     */
2726    public void append(CharSequence text, int start, int end) {
2727        if (!(mText instanceof Editable)) {
2728            setText(mText, BufferType.EDITABLE);
2729        }
2730
2731        ((Editable) mText).append(text, start, end);
2732    }
2733
2734    private void updateTextColors() {
2735        boolean inval = false;
2736        int color = mTextColor.getColorForState(getDrawableState(), 0);
2737        if (color != mCurTextColor) {
2738            mCurTextColor = color;
2739            inval = true;
2740        }
2741        if (mLinkTextColor != null) {
2742            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2743            if (color != mTextPaint.linkColor) {
2744                mTextPaint.linkColor = color;
2745                inval = true;
2746            }
2747        }
2748        if (mHintTextColor != null) {
2749            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2750            if (color != mCurHintTextColor && mText.length() == 0) {
2751                mCurHintTextColor = color;
2752                inval = true;
2753            }
2754        }
2755        if (inval) {
2756            invalidate();
2757        }
2758    }
2759
2760    @Override
2761    protected void drawableStateChanged() {
2762        super.drawableStateChanged();
2763        if (mTextColor != null && mTextColor.isStateful()
2764                || (mHintTextColor != null && mHintTextColor.isStateful())
2765                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2766            updateTextColors();
2767        }
2768
2769        final Drawables dr = mDrawables;
2770        if (dr != null) {
2771            int[] state = getDrawableState();
2772            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2773                dr.mDrawableTop.setState(state);
2774            }
2775            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2776                dr.mDrawableBottom.setState(state);
2777            }
2778            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2779                dr.mDrawableLeft.setState(state);
2780            }
2781            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2782                dr.mDrawableRight.setState(state);
2783            }
2784            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2785                dr.mDrawableStart.setState(state);
2786            }
2787            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2788                dr.mDrawableEnd.setState(state);
2789            }
2790        }
2791    }
2792
2793    /**
2794     * User interface state that is stored by TextView for implementing
2795     * {@link View#onSaveInstanceState}.
2796     */
2797    public static class SavedState extends BaseSavedState {
2798        int selStart;
2799        int selEnd;
2800        CharSequence text;
2801        boolean frozenWithFocus;
2802        CharSequence error;
2803
2804        SavedState(Parcelable superState) {
2805            super(superState);
2806        }
2807
2808        @Override
2809        public void writeToParcel(Parcel out, int flags) {
2810            super.writeToParcel(out, flags);
2811            out.writeInt(selStart);
2812            out.writeInt(selEnd);
2813            out.writeInt(frozenWithFocus ? 1 : 0);
2814            TextUtils.writeToParcel(text, out, flags);
2815
2816            if (error == null) {
2817                out.writeInt(0);
2818            } else {
2819                out.writeInt(1);
2820                TextUtils.writeToParcel(error, out, flags);
2821            }
2822        }
2823
2824        @Override
2825        public String toString() {
2826            String str = "TextView.SavedState{"
2827                    + Integer.toHexString(System.identityHashCode(this))
2828                    + " start=" + selStart + " end=" + selEnd;
2829            if (text != null) {
2830                str += " text=" + text;
2831            }
2832            return str + "}";
2833        }
2834
2835        @SuppressWarnings("hiding")
2836        public static final Parcelable.Creator<SavedState> CREATOR
2837                = new Parcelable.Creator<SavedState>() {
2838            public SavedState createFromParcel(Parcel in) {
2839                return new SavedState(in);
2840            }
2841
2842            public SavedState[] newArray(int size) {
2843                return new SavedState[size];
2844            }
2845        };
2846
2847        private SavedState(Parcel in) {
2848            super(in);
2849            selStart = in.readInt();
2850            selEnd = in.readInt();
2851            frozenWithFocus = (in.readInt() != 0);
2852            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2853
2854            if (in.readInt() != 0) {
2855                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2856            }
2857        }
2858    }
2859
2860    @Override
2861    public Parcelable onSaveInstanceState() {
2862        Parcelable superState = super.onSaveInstanceState();
2863
2864        // Save state if we are forced to
2865        boolean save = mFreezesText;
2866        int start = 0;
2867        int end = 0;
2868
2869        if (mText != null) {
2870            start = getSelectionStart();
2871            end = getSelectionEnd();
2872            if (start >= 0 || end >= 0) {
2873                // Or save state if there is a selection
2874                save = true;
2875            }
2876        }
2877
2878        if (save) {
2879            SavedState ss = new SavedState(superState);
2880            // XXX Should also save the current scroll position!
2881            ss.selStart = start;
2882            ss.selEnd = end;
2883
2884            if (mText instanceof Spanned) {
2885                /*
2886                 * Calling setText() strips off any ChangeWatchers;
2887                 * strip them now to avoid leaking references.
2888                 * But do it to a copy so that if there are any
2889                 * further changes to the text of this view, it
2890                 * won't get into an inconsistent state.
2891                 */
2892
2893                Spannable sp = new SpannableString(mText);
2894
2895                for (ChangeWatcher cw :
2896                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2897                    sp.removeSpan(cw);
2898                }
2899
2900                // hideControllers would do it, but it gets called after this method on rotation
2901                sp.removeSpan(mSuggestionRangeSpan);
2902
2903                ss.text = sp;
2904            } else {
2905                ss.text = mText.toString();
2906            }
2907
2908            if (isFocused() && start >= 0 && end >= 0) {
2909                ss.frozenWithFocus = true;
2910            }
2911
2912            ss.error = mError;
2913
2914            return ss;
2915        }
2916
2917        return superState;
2918    }
2919
2920    @Override
2921    public void onRestoreInstanceState(Parcelable state) {
2922        if (!(state instanceof SavedState)) {
2923            super.onRestoreInstanceState(state);
2924            return;
2925        }
2926
2927        SavedState ss = (SavedState)state;
2928        super.onRestoreInstanceState(ss.getSuperState());
2929
2930        // XXX restore buffer type too, as well as lots of other stuff
2931        if (ss.text != null) {
2932            setText(ss.text);
2933        }
2934
2935        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2936            if (mText instanceof Spannable) {
2937                int len = mText.length();
2938
2939                if (ss.selStart > len || ss.selEnd > len) {
2940                    String restored = "";
2941
2942                    if (ss.text != null) {
2943                        restored = "(restored) ";
2944                    }
2945
2946                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2947                          "/" + ss.selEnd + " out of range for " + restored +
2948                          "text " + mText);
2949                } else {
2950                    Selection.setSelection((Spannable) mText, ss.selStart,
2951                                           ss.selEnd);
2952
2953                    if (ss.frozenWithFocus) {
2954                        mFrozenWithFocus = true;
2955                    }
2956                }
2957            }
2958        }
2959
2960        if (ss.error != null) {
2961            final CharSequence error = ss.error;
2962            // Display the error later, after the first layout pass
2963            post(new Runnable() {
2964                public void run() {
2965                    setError(error);
2966                }
2967            });
2968        }
2969    }
2970
2971    /**
2972     * Control whether this text view saves its entire text contents when
2973     * freezing to an icicle, in addition to dynamic state such as cursor
2974     * position.  By default this is false, not saving the text.  Set to true
2975     * if the text in the text view is not being saved somewhere else in
2976     * persistent storage (such as in a content provider) so that if the
2977     * view is later thawed the user will not lose their data.
2978     *
2979     * @param freezesText Controls whether a frozen icicle should include the
2980     * entire text data: true to include it, false to not.
2981     *
2982     * @attr ref android.R.styleable#TextView_freezesText
2983     */
2984    @android.view.RemotableViewMethod
2985    public void setFreezesText(boolean freezesText) {
2986        mFreezesText = freezesText;
2987    }
2988
2989    /**
2990     * Return whether this text view is including its entire text contents
2991     * in frozen icicles.
2992     *
2993     * @return Returns true if text is included, false if it isn't.
2994     *
2995     * @see #setFreezesText
2996     */
2997    public boolean getFreezesText() {
2998        return mFreezesText;
2999    }
3000
3001    ///////////////////////////////////////////////////////////////////////////
3002
3003    /**
3004     * Sets the Factory used to create new Editables.
3005     */
3006    public final void setEditableFactory(Editable.Factory factory) {
3007        mEditableFactory = factory;
3008        setText(mText);
3009    }
3010
3011    /**
3012     * Sets the Factory used to create new Spannables.
3013     */
3014    public final void setSpannableFactory(Spannable.Factory factory) {
3015        mSpannableFactory = factory;
3016        setText(mText);
3017    }
3018
3019    /**
3020     * Sets the string value of the TextView. TextView <em>does not</em> accept
3021     * HTML-like formatting, which you can do with text strings in XML resource files.
3022     * To style your strings, attach android.text.style.* objects to a
3023     * {@link android.text.SpannableString SpannableString}, or see the
3024     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3025     * Available Resource Types</a> documentation for an example of setting
3026     * formatted text in the XML resource file.
3027     *
3028     * @attr ref android.R.styleable#TextView_text
3029     */
3030    @android.view.RemotableViewMethod
3031    public final void setText(CharSequence text) {
3032        setText(text, mBufferType);
3033    }
3034
3035    /**
3036     * Like {@link #setText(CharSequence)},
3037     * except that the cursor position (if any) is retained in the new text.
3038     *
3039     * @param text The new text to place in the text view.
3040     *
3041     * @see #setText(CharSequence)
3042     */
3043    @android.view.RemotableViewMethod
3044    public final void setTextKeepState(CharSequence text) {
3045        setTextKeepState(text, mBufferType);
3046    }
3047
3048    /**
3049     * Sets the text that this TextView is to display (see
3050     * {@link #setText(CharSequence)}) and also sets whether it is stored
3051     * in a styleable/spannable buffer and whether it is editable.
3052     *
3053     * @attr ref android.R.styleable#TextView_text
3054     * @attr ref android.R.styleable#TextView_bufferType
3055     */
3056    public void setText(CharSequence text, BufferType type) {
3057        setText(text, type, true, 0);
3058
3059        if (mCharWrapper != null) {
3060            mCharWrapper.mChars = null;
3061        }
3062    }
3063
3064    private void setText(CharSequence text, BufferType type,
3065                         boolean notifyBefore, int oldlen) {
3066        if (text == null) {
3067            text = "";
3068        }
3069
3070        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3071
3072        if (text instanceof Spanned &&
3073            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3074            setHorizontalFadingEdgeEnabled(
3075                    ViewConfiguration.get(mContext).isFadingMarqueeEnabled());
3076            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3077        }
3078
3079        int n = mFilters.length;
3080        for (int i = 0; i < n; i++) {
3081            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3082                                                  EMPTY_SPANNED, 0, 0);
3083            if (out != null) {
3084                text = out;
3085            }
3086        }
3087
3088        if (notifyBefore) {
3089            if (mText != null) {
3090                oldlen = mText.length();
3091                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3092            } else {
3093                sendBeforeTextChanged("", 0, 0, text.length());
3094            }
3095        }
3096
3097        boolean needEditableForNotification = false;
3098
3099        if (mListeners != null && mListeners.size() != 0) {
3100            needEditableForNotification = true;
3101        }
3102
3103        if (type == BufferType.EDITABLE || mInput != null ||
3104            needEditableForNotification) {
3105            Editable t = mEditableFactory.newEditable(text);
3106            text = t;
3107            setFilters(t, mFilters);
3108            InputMethodManager imm = InputMethodManager.peekInstance();
3109            if (imm != null) imm.restartInput(this);
3110        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3111            text = mSpannableFactory.newSpannable(text);
3112        } else if (!(text instanceof CharWrapper)) {
3113            text = TextUtils.stringOrSpannedString(text);
3114        }
3115
3116        if (mAutoLinkMask != 0) {
3117            Spannable s2;
3118
3119            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3120                s2 = (Spannable) text;
3121            } else {
3122                s2 = mSpannableFactory.newSpannable(text);
3123            }
3124
3125            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3126                text = s2;
3127                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3128
3129                /*
3130                 * We must go ahead and set the text before changing the
3131                 * movement method, because setMovementMethod() may call
3132                 * setText() again to try to upgrade the buffer type.
3133                 */
3134                mText = text;
3135
3136                // Do not change the movement method for text that support text selection as it
3137                // would prevent an arbitrary cursor displacement.
3138                if (mLinksClickable && !textCanBeSelected()) {
3139                    setMovementMethod(LinkMovementMethod.getInstance());
3140                }
3141            }
3142        }
3143
3144        mBufferType = type;
3145        mText = text;
3146
3147        if (mTransformation == null) {
3148            mTransformed = text;
3149        } else {
3150            mTransformed = mTransformation.getTransformation(text, this);
3151        }
3152
3153        final int textLength = text.length();
3154
3155        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3156            Spannable sp = (Spannable) text;
3157
3158            // Remove any ChangeWatchers that might have come
3159            // from other TextViews.
3160            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3161            final int count = watchers.length;
3162            for (int i = 0; i < count; i++)
3163                sp.removeSpan(watchers[i]);
3164
3165            if (mChangeWatcher == null)
3166                mChangeWatcher = new ChangeWatcher();
3167
3168            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3169                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3170
3171            if (mInput != null) {
3172                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3173            }
3174
3175            if (mTransformation != null) {
3176                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3177            }
3178
3179            if (mMovement != null) {
3180                mMovement.initialize(this, (Spannable) text);
3181
3182                /*
3183                 * Initializing the movement method will have set the
3184                 * selection, so reset mSelectionMoved to keep that from
3185                 * interfering with the normal on-focus selection-setting.
3186                 */
3187                mSelectionMoved = false;
3188            }
3189        }
3190
3191        if (mLayout != null) {
3192            checkForRelayout();
3193        }
3194
3195        sendOnTextChanged(text, 0, oldlen, textLength);
3196        onTextChanged(text, 0, oldlen, textLength);
3197
3198        if (needEditableForNotification) {
3199            sendAfterTextChanged((Editable) text);
3200        }
3201
3202        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3203        prepareCursorControllers();
3204    }
3205
3206    /**
3207     * Sets the TextView to display the specified slice of the specified
3208     * char array.  You must promise that you will not change the contents
3209     * of the array except for right before another call to setText(),
3210     * since the TextView has no way to know that the text
3211     * has changed and that it needs to invalidate and re-layout.
3212     */
3213    public final void setText(char[] text, int start, int len) {
3214        int oldlen = 0;
3215
3216        if (start < 0 || len < 0 || start + len > text.length) {
3217            throw new IndexOutOfBoundsException(start + ", " + len);
3218        }
3219
3220        /*
3221         * We must do the before-notification here ourselves because if
3222         * the old text is a CharWrapper we destroy it before calling
3223         * into the normal path.
3224         */
3225        if (mText != null) {
3226            oldlen = mText.length();
3227            sendBeforeTextChanged(mText, 0, oldlen, len);
3228        } else {
3229            sendBeforeTextChanged("", 0, 0, len);
3230        }
3231
3232        if (mCharWrapper == null) {
3233            mCharWrapper = new CharWrapper(text, start, len);
3234        } else {
3235            mCharWrapper.set(text, start, len);
3236        }
3237
3238        setText(mCharWrapper, mBufferType, false, oldlen);
3239    }
3240
3241    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3242        private char[] mChars;
3243        private int mStart, mLength;
3244
3245        public CharWrapper(char[] chars, int start, int len) {
3246            mChars = chars;
3247            mStart = start;
3248            mLength = len;
3249        }
3250
3251        /* package */ void set(char[] chars, int start, int len) {
3252            mChars = chars;
3253            mStart = start;
3254            mLength = len;
3255        }
3256
3257        public int length() {
3258            return mLength;
3259        }
3260
3261        public char charAt(int off) {
3262            return mChars[off + mStart];
3263        }
3264
3265        @Override
3266        public String toString() {
3267            return new String(mChars, mStart, mLength);
3268        }
3269
3270        public CharSequence subSequence(int start, int end) {
3271            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3272                throw new IndexOutOfBoundsException(start + ", " + end);
3273            }
3274
3275            return new String(mChars, start + mStart, end - start);
3276        }
3277
3278        public void getChars(int start, int end, char[] buf, int off) {
3279            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3280                throw new IndexOutOfBoundsException(start + ", " + end);
3281            }
3282
3283            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3284        }
3285
3286        public void drawText(Canvas c, int start, int end,
3287                             float x, float y, Paint p) {
3288            c.drawText(mChars, start + mStart, end - start, x, y, p);
3289        }
3290
3291        public void drawTextRun(Canvas c, int start, int end,
3292                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3293            int count = end - start;
3294            int contextCount = contextEnd - contextStart;
3295            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3296                    contextCount, x, y, flags, p);
3297        }
3298
3299        public float measureText(int start, int end, Paint p) {
3300            return p.measureText(mChars, start + mStart, end - start);
3301        }
3302
3303        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3304            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3305        }
3306
3307        public float getTextRunAdvances(int start, int end, int contextStart,
3308                int contextEnd, int flags, float[] advances, int advancesIndex,
3309                Paint p) {
3310            int count = end - start;
3311            int contextCount = contextEnd - contextStart;
3312            return p.getTextRunAdvances(mChars, start + mStart, count,
3313                    contextStart + mStart, contextCount, flags, advances,
3314                    advancesIndex);
3315        }
3316
3317        public float getTextRunAdvances(int start, int end, int contextStart,
3318                int contextEnd, int flags, float[] advances, int advancesIndex,
3319                Paint p, int reserved) {
3320            int count = end - start;
3321            int contextCount = contextEnd - contextStart;
3322            return p.getTextRunAdvances(mChars, start + mStart, count,
3323                    contextStart + mStart, contextCount, flags, advances,
3324                    advancesIndex, reserved);
3325        }
3326
3327        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3328                int offset, int cursorOpt, Paint p) {
3329            int contextCount = contextEnd - contextStart;
3330            return p.getTextRunCursor(mChars, contextStart + mStart,
3331                    contextCount, flags, offset + mStart, cursorOpt);
3332        }
3333    }
3334
3335    /**
3336     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3337     * except that the cursor position (if any) is retained in the new text.
3338     *
3339     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3340     */
3341    public final void setTextKeepState(CharSequence text, BufferType type) {
3342        int start = getSelectionStart();
3343        int end = getSelectionEnd();
3344        int len = text.length();
3345
3346        setText(text, type);
3347
3348        if (start >= 0 || end >= 0) {
3349            if (mText instanceof Spannable) {
3350                Selection.setSelection((Spannable) mText,
3351                                       Math.max(0, Math.min(start, len)),
3352                                       Math.max(0, Math.min(end, len)));
3353            }
3354        }
3355    }
3356
3357    @android.view.RemotableViewMethod
3358    public final void setText(int resid) {
3359        setText(getContext().getResources().getText(resid));
3360    }
3361
3362    public final void setText(int resid, BufferType type) {
3363        setText(getContext().getResources().getText(resid), type);
3364    }
3365
3366    /**
3367     * Sets the text to be displayed when the text of the TextView is empty.
3368     * Null means to use the normal empty text. The hint does not currently
3369     * participate in determining the size of the view.
3370     *
3371     * @attr ref android.R.styleable#TextView_hint
3372     */
3373    @android.view.RemotableViewMethod
3374    public final void setHint(CharSequence hint) {
3375        mHint = TextUtils.stringOrSpannedString(hint);
3376
3377        if (mLayout != null) {
3378            checkForRelayout();
3379        }
3380
3381        if (mText.length() == 0) {
3382            invalidate();
3383        }
3384    }
3385
3386    /**
3387     * Sets the text to be displayed when the text of the TextView is empty,
3388     * from a resource.
3389     *
3390     * @attr ref android.R.styleable#TextView_hint
3391     */
3392    @android.view.RemotableViewMethod
3393    public final void setHint(int resid) {
3394        setHint(getContext().getResources().getText(resid));
3395    }
3396
3397    /**
3398     * Returns the hint that is displayed when the text of the TextView
3399     * is empty.
3400     *
3401     * @attr ref android.R.styleable#TextView_hint
3402     */
3403    @ViewDebug.CapturedViewProperty
3404    public CharSequence getHint() {
3405        return mHint;
3406    }
3407
3408    private static boolean isMultilineInputType(int type) {
3409        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3410            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3411    }
3412
3413    /**
3414     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3415     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3416     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3417     * then a soft keyboard will not be displayed for this text view.
3418     *
3419     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3420     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3421     * type.
3422     *
3423     * @see #getInputType()
3424     * @see #setRawInputType(int)
3425     * @see android.text.InputType
3426     * @attr ref android.R.styleable#TextView_inputType
3427     */
3428    public void setInputType(int type) {
3429        final boolean wasPassword = isPasswordInputType(mInputType);
3430        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3431        setInputType(type, false);
3432        final boolean isPassword = isPasswordInputType(type);
3433        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3434        boolean forceUpdate = false;
3435        if (isPassword) {
3436            setTransformationMethod(PasswordTransformationMethod.getInstance());
3437            setTypefaceByIndex(MONOSPACE, 0);
3438        } else if (isVisiblePassword) {
3439            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3440                forceUpdate = true;
3441            }
3442            setTypefaceByIndex(MONOSPACE, 0);
3443        } else if (wasPassword || wasVisiblePassword) {
3444            // not in password mode, clean up typeface and transformation
3445            setTypefaceByIndex(-1, -1);
3446            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3447                forceUpdate = true;
3448            }
3449        }
3450
3451        boolean singleLine = !isMultilineInputType(type);
3452
3453        // We need to update the single line mode if it has changed or we
3454        // were previously in password mode.
3455        if (mSingleLine != singleLine || forceUpdate) {
3456            // Change single line mode, but only change the transformation if
3457            // we are not in password mode.
3458            applySingleLine(singleLine, !isPassword, true);
3459        }
3460
3461        InputMethodManager imm = InputMethodManager.peekInstance();
3462        if (imm != null) imm.restartInput(this);
3463    }
3464
3465    /**
3466     * It would be better to rely on the input type for everything. A password inputType should have
3467     * a password transformation. We should hence use isPasswordInputType instead of this method.
3468     *
3469     * We should:
3470     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3471     * would install the correct transformation).
3472     * - Refuse the installation of a non-password transformation in setTransformation if the input
3473     * type is password.
3474     *
3475     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3476     * is useful since it matches what the user can see (obfuscated text or not).
3477     *
3478     * @return true if the current transformation method is of the password type.
3479     */
3480    private boolean hasPasswordTransformationMethod() {
3481        return mTransformation instanceof PasswordTransformationMethod;
3482    }
3483
3484    private static boolean isPasswordInputType(int inputType) {
3485        final int variation =
3486                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3487        return variation
3488                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3489                || variation
3490                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3491                || variation
3492                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3493    }
3494
3495    private static boolean isVisiblePasswordInputType(int inputType) {
3496        final int variation =
3497                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3498        return variation
3499                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3500    }
3501
3502    /**
3503     * Directly change the content type integer of the text view, without
3504     * modifying any other state.
3505     * @see #setInputType(int)
3506     * @see android.text.InputType
3507     * @attr ref android.R.styleable#TextView_inputType
3508     */
3509    public void setRawInputType(int type) {
3510        mInputType = type;
3511    }
3512
3513    private void setInputType(int type, boolean direct) {
3514        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3515        KeyListener input;
3516        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3517            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3518            TextKeyListener.Capitalize cap;
3519            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3520                cap = TextKeyListener.Capitalize.CHARACTERS;
3521            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3522                cap = TextKeyListener.Capitalize.WORDS;
3523            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3524                cap = TextKeyListener.Capitalize.SENTENCES;
3525            } else {
3526                cap = TextKeyListener.Capitalize.NONE;
3527            }
3528            input = TextKeyListener.getInstance(autotext, cap);
3529        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3530            input = DigitsKeyListener.getInstance(
3531                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3532                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3533        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3534            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3535                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3536                    input = DateKeyListener.getInstance();
3537                    break;
3538                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3539                    input = TimeKeyListener.getInstance();
3540                    break;
3541                default:
3542                    input = DateTimeKeyListener.getInstance();
3543                    break;
3544            }
3545        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3546            input = DialerKeyListener.getInstance();
3547        } else {
3548            input = TextKeyListener.getInstance();
3549        }
3550        setRawInputType(type);
3551        if (direct) mInput = input;
3552        else {
3553            setKeyListenerOnly(input);
3554        }
3555    }
3556
3557    /**
3558     * Get the type of the content.
3559     *
3560     * @see #setInputType(int)
3561     * @see android.text.InputType
3562     */
3563    public int getInputType() {
3564        return mInputType;
3565    }
3566
3567    /**
3568     * Change the editor type integer associated with the text view, which
3569     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3570     * has focus.
3571     * @see #getImeOptions
3572     * @see android.view.inputmethod.EditorInfo
3573     * @attr ref android.R.styleable#TextView_imeOptions
3574     */
3575    public void setImeOptions(int imeOptions) {
3576        if (mInputContentType == null) {
3577            mInputContentType = new InputContentType();
3578        }
3579        mInputContentType.imeOptions = imeOptions;
3580    }
3581
3582    /**
3583     * Get the type of the IME editor.
3584     *
3585     * @see #setImeOptions(int)
3586     * @see android.view.inputmethod.EditorInfo
3587     */
3588    public int getImeOptions() {
3589        return mInputContentType != null
3590                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3591    }
3592
3593    /**
3594     * Change the custom IME action associated with the text view, which
3595     * will be reported to an IME with {@link EditorInfo#actionLabel}
3596     * and {@link EditorInfo#actionId} when it has focus.
3597     * @see #getImeActionLabel
3598     * @see #getImeActionId
3599     * @see android.view.inputmethod.EditorInfo
3600     * @attr ref android.R.styleable#TextView_imeActionLabel
3601     * @attr ref android.R.styleable#TextView_imeActionId
3602     */
3603    public void setImeActionLabel(CharSequence label, int actionId) {
3604        if (mInputContentType == null) {
3605            mInputContentType = new InputContentType();
3606        }
3607        mInputContentType.imeActionLabel = label;
3608        mInputContentType.imeActionId = actionId;
3609    }
3610
3611    /**
3612     * Get the IME action label previous set with {@link #setImeActionLabel}.
3613     *
3614     * @see #setImeActionLabel
3615     * @see android.view.inputmethod.EditorInfo
3616     */
3617    public CharSequence getImeActionLabel() {
3618        return mInputContentType != null
3619                ? mInputContentType.imeActionLabel : null;
3620    }
3621
3622    /**
3623     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3624     *
3625     * @see #setImeActionLabel
3626     * @see android.view.inputmethod.EditorInfo
3627     */
3628    public int getImeActionId() {
3629        return mInputContentType != null
3630                ? mInputContentType.imeActionId : 0;
3631    }
3632
3633    /**
3634     * Set a special listener to be called when an action is performed
3635     * on the text view.  This will be called when the enter key is pressed,
3636     * or when an action supplied to the IME is selected by the user.  Setting
3637     * this means that the normal hard key event will not insert a newline
3638     * into the text view, even if it is multi-line; holding down the ALT
3639     * modifier will, however, allow the user to insert a newline character.
3640     */
3641    public void setOnEditorActionListener(OnEditorActionListener l) {
3642        if (mInputContentType == null) {
3643            mInputContentType = new InputContentType();
3644        }
3645        mInputContentType.onEditorActionListener = l;
3646    }
3647
3648    /**
3649     * Called when an attached input method calls
3650     * {@link InputConnection#performEditorAction(int)
3651     * InputConnection.performEditorAction()}
3652     * for this text view.  The default implementation will call your action
3653     * listener supplied to {@link #setOnEditorActionListener}, or perform
3654     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3655     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3656     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3657     * EditorInfo.IME_ACTION_DONE}.
3658     *
3659     * <p>For backwards compatibility, if no IME options have been set and the
3660     * text view would not normally advance focus on enter, then
3661     * the NEXT and DONE actions received here will be turned into an enter
3662     * key down/up pair to go through the normal key handling.
3663     *
3664     * @param actionCode The code of the action being performed.
3665     *
3666     * @see #setOnEditorActionListener
3667     */
3668    public void onEditorAction(int actionCode) {
3669        final InputContentType ict = mInputContentType;
3670        if (ict != null) {
3671            if (ict.onEditorActionListener != null) {
3672                if (ict.onEditorActionListener.onEditorAction(this,
3673                        actionCode, null)) {
3674                    return;
3675                }
3676            }
3677
3678            // This is the handling for some default action.
3679            // Note that for backwards compatibility we don't do this
3680            // default handling if explicit ime options have not been given,
3681            // instead turning this into the normal enter key codes that an
3682            // app may be expecting.
3683            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3684                View v = focusSearch(FOCUS_DOWN);
3685                if (v != null) {
3686                    if (!v.requestFocus(FOCUS_DOWN)) {
3687                        throw new IllegalStateException("focus search returned a view " +
3688                                "that wasn't able to take focus!");
3689                    }
3690                }
3691                return;
3692
3693            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3694                View v = focusSearch(FOCUS_UP);
3695                if (v != null) {
3696                    if (!v.requestFocus(FOCUS_UP)) {
3697                        throw new IllegalStateException("focus search returned a view " +
3698                                "that wasn't able to take focus!");
3699                    }
3700                }
3701                return;
3702
3703            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3704                InputMethodManager imm = InputMethodManager.peekInstance();
3705                if (imm != null && imm.isActive(this)) {
3706                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3707                }
3708                return;
3709            }
3710        }
3711
3712        Handler h = getHandler();
3713        if (h != null) {
3714            long eventTime = SystemClock.uptimeMillis();
3715            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3716                    new KeyEvent(eventTime, eventTime,
3717                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3718                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3719                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3720                    | KeyEvent.FLAG_EDITOR_ACTION)));
3721            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3722                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3723                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3724                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3725                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3726                    | KeyEvent.FLAG_EDITOR_ACTION)));
3727        }
3728    }
3729
3730    /**
3731     * Set the private content type of the text, which is the
3732     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3733     * field that will be filled in when creating an input connection.
3734     *
3735     * @see #getPrivateImeOptions()
3736     * @see EditorInfo#privateImeOptions
3737     * @attr ref android.R.styleable#TextView_privateImeOptions
3738     */
3739    public void setPrivateImeOptions(String type) {
3740        if (mInputContentType == null) mInputContentType = new InputContentType();
3741        mInputContentType.privateImeOptions = type;
3742    }
3743
3744    /**
3745     * Get the private type of the content.
3746     *
3747     * @see #setPrivateImeOptions(String)
3748     * @see EditorInfo#privateImeOptions
3749     */
3750    public String getPrivateImeOptions() {
3751        return mInputContentType != null
3752                ? mInputContentType.privateImeOptions : null;
3753    }
3754
3755    /**
3756     * Set the extra input data of the text, which is the
3757     * {@link EditorInfo#extras TextBoxAttribute.extras}
3758     * Bundle that will be filled in when creating an input connection.  The
3759     * given integer is the resource ID of an XML resource holding an
3760     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3761     *
3762     * @see #getInputExtras(boolean)
3763     * @see EditorInfo#extras
3764     * @attr ref android.R.styleable#TextView_editorExtras
3765     */
3766    public void setInputExtras(int xmlResId)
3767            throws XmlPullParserException, IOException {
3768        XmlResourceParser parser = getResources().getXml(xmlResId);
3769        if (mInputContentType == null) mInputContentType = new InputContentType();
3770        mInputContentType.extras = new Bundle();
3771        getResources().parseBundleExtras(parser, mInputContentType.extras);
3772    }
3773
3774    /**
3775     * Retrieve the input extras currently associated with the text view, which
3776     * can be viewed as well as modified.
3777     *
3778     * @param create If true, the extras will be created if they don't already
3779     * exist.  Otherwise, null will be returned if none have been created.
3780     * @see #setInputExtras(int)
3781     * @see EditorInfo#extras
3782     * @attr ref android.R.styleable#TextView_editorExtras
3783     */
3784    public Bundle getInputExtras(boolean create) {
3785        if (mInputContentType == null) {
3786            if (!create) return null;
3787            mInputContentType = new InputContentType();
3788        }
3789        if (mInputContentType.extras == null) {
3790            if (!create) return null;
3791            mInputContentType.extras = new Bundle();
3792        }
3793        return mInputContentType.extras;
3794    }
3795
3796    /**
3797     * Returns the error message that was set to be displayed with
3798     * {@link #setError}, or <code>null</code> if no error was set
3799     * or if it the error was cleared by the widget after user input.
3800     */
3801    public CharSequence getError() {
3802        return mError;
3803    }
3804
3805    /**
3806     * Sets the right-hand compound drawable of the TextView to the "error"
3807     * icon and sets an error message that will be displayed in a popup when
3808     * the TextView has focus.  The icon and error message will be reset to
3809     * null when any key events cause changes to the TextView's text.  If the
3810     * <code>error</code> is <code>null</code>, the error message and icon
3811     * will be cleared.
3812     */
3813    @android.view.RemotableViewMethod
3814    public void setError(CharSequence error) {
3815        if (error == null) {
3816            setError(null, null);
3817        } else {
3818            Drawable dr = getContext().getResources().
3819                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3820
3821            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3822            setError(error, dr);
3823        }
3824    }
3825
3826    /**
3827     * Sets the right-hand compound drawable of the TextView to the specified
3828     * icon and sets an error message that will be displayed in a popup when
3829     * the TextView has focus.  The icon and error message will be reset to
3830     * null when any key events cause changes to the TextView's text.  The
3831     * drawable must already have had {@link Drawable#setBounds} set on it.
3832     * If the <code>error</code> is <code>null</code>, the error message will
3833     * be cleared (and you should provide a <code>null</code> icon as well).
3834     */
3835    public void setError(CharSequence error, Drawable icon) {
3836        error = TextUtils.stringOrSpannedString(error);
3837
3838        mError = error;
3839        mErrorWasChanged = true;
3840        final Drawables dr = mDrawables;
3841        if (dr != null) {
3842            switch (getResolvedLayoutDirection()) {
3843                default:
3844                case LAYOUT_DIRECTION_LTR:
3845                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3846                            dr.mDrawableBottom);
3847                    break;
3848                case LAYOUT_DIRECTION_RTL:
3849                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3850                            dr.mDrawableBottom);
3851                    break;
3852            }
3853        } else {
3854            setCompoundDrawables(null, null, icon, null);
3855        }
3856
3857        if (error == null) {
3858            if (mPopup != null) {
3859                if (mPopup.isShowing()) {
3860                    mPopup.dismiss();
3861                }
3862
3863                mPopup = null;
3864            }
3865        } else {
3866            if (isFocused()) {
3867                showError();
3868            }
3869        }
3870    }
3871
3872    private void showError() {
3873        if (getWindowToken() == null) {
3874            mShowErrorAfterAttach = true;
3875            return;
3876        }
3877
3878        if (mPopup == null) {
3879            LayoutInflater inflater = LayoutInflater.from(getContext());
3880            final TextView err = (TextView) inflater.inflate(
3881                    com.android.internal.R.layout.textview_hint, null);
3882
3883            final float scale = getResources().getDisplayMetrics().density;
3884            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3885            mPopup.setFocusable(false);
3886            // The user is entering text, so the input method is needed.  We
3887            // don't want the popup to be displayed on top of it.
3888            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3889        }
3890
3891        TextView tv = (TextView) mPopup.getContentView();
3892        chooseSize(mPopup, mError, tv);
3893        tv.setText(mError);
3894
3895        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3896        mPopup.fixDirection(mPopup.isAboveAnchor());
3897    }
3898
3899    private static class ErrorPopup extends PopupWindow {
3900        private boolean mAbove = false;
3901        private final TextView mView;
3902        private int mPopupInlineErrorBackgroundId = 0;
3903        private int mPopupInlineErrorAboveBackgroundId = 0;
3904
3905        ErrorPopup(TextView v, int width, int height) {
3906            super(v, width, height);
3907            mView = v;
3908            // Make sure the TextView has a background set as it will be used the first time it is
3909            // shown and positionned. Initialized with below background, which should have
3910            // dimensions identical to the above version for this to work (and is more likely).
3911            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3912                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3913            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3914        }
3915
3916        void fixDirection(boolean above) {
3917            mAbove = above;
3918
3919            if (above) {
3920                mPopupInlineErrorAboveBackgroundId =
3921                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3922                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3923            } else {
3924                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3925                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3926            }
3927
3928            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3929                mPopupInlineErrorBackgroundId);
3930        }
3931
3932        private int getResourceId(int currentId, int index) {
3933            if (currentId == 0) {
3934                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3935                        R.styleable.Theme);
3936                currentId = styledAttributes.getResourceId(index, 0);
3937                styledAttributes.recycle();
3938            }
3939            return currentId;
3940        }
3941
3942        @Override
3943        public void update(int x, int y, int w, int h, boolean force) {
3944            super.update(x, y, w, h, force);
3945
3946            boolean above = isAboveAnchor();
3947            if (above != mAbove) {
3948                fixDirection(above);
3949            }
3950        }
3951    }
3952
3953    /**
3954     * Returns the Y offset to make the pointy top of the error point
3955     * at the middle of the error icon.
3956     */
3957    private int getErrorX() {
3958        /*
3959         * The "25" is the distance between the point and the right edge
3960         * of the background
3961         */
3962        final float scale = getResources().getDisplayMetrics().density;
3963
3964        final Drawables dr = mDrawables;
3965        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3966                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3967    }
3968
3969    /**
3970     * Returns the Y offset to make the pointy top of the error point
3971     * at the bottom of the error icon.
3972     */
3973    private int getErrorY() {
3974        /*
3975         * Compound, not extended, because the icon is not clipped
3976         * if the text height is smaller.
3977         */
3978        final int compoundPaddingTop = getCompoundPaddingTop();
3979        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3980
3981        final Drawables dr = mDrawables;
3982        int icontop = compoundPaddingTop +
3983                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3984
3985        /*
3986         * The "2" is the distance between the point and the top edge
3987         * of the background.
3988         */
3989        final float scale = getResources().getDisplayMetrics().density;
3990        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
3991                (int) (2 * scale + 0.5f);
3992    }
3993
3994    private void hideError() {
3995        if (mPopup != null) {
3996            if (mPopup.isShowing()) {
3997                mPopup.dismiss();
3998            }
3999        }
4000
4001        mShowErrorAfterAttach = false;
4002    }
4003
4004    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4005        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4006        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4007
4008        /*
4009         * Figure out how big the text would be if we laid it out to the
4010         * full width of this view minus the border.
4011         */
4012        int cap = getWidth() - wid;
4013        if (cap < 0) {
4014            cap = 200; // We must not be measured yet -- setFrame() will fix it.
4015        }
4016
4017        Layout l = new StaticLayout(text, tv.getPaint(), cap,
4018                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4019        float max = 0;
4020        for (int i = 0; i < l.getLineCount(); i++) {
4021            max = Math.max(max, l.getLineWidth(i));
4022        }
4023
4024        /*
4025         * Now set the popup size to be big enough for the text plus the border.
4026         */
4027        pop.setWidth(wid + (int) Math.ceil(max));
4028        pop.setHeight(ht + l.getHeight());
4029    }
4030
4031
4032    @Override
4033    protected boolean setFrame(int l, int t, int r, int b) {
4034        boolean result = super.setFrame(l, t, r, b);
4035
4036        if (mPopup != null) {
4037            TextView tv = (TextView) mPopup.getContentView();
4038            chooseSize(mPopup, mError, tv);
4039            mPopup.update(this, getErrorX(), getErrorY(),
4040                          mPopup.getWidth(), mPopup.getHeight());
4041        }
4042
4043        restartMarqueeIfNeeded();
4044
4045        return result;
4046    }
4047
4048    private void restartMarqueeIfNeeded() {
4049        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4050            mRestartMarquee = false;
4051            startMarquee();
4052        }
4053    }
4054
4055    /**
4056     * Sets the list of input filters that will be used if the buffer is
4057     * Editable.  Has no effect otherwise.
4058     *
4059     * @attr ref android.R.styleable#TextView_maxLength
4060     */
4061    public void setFilters(InputFilter[] filters) {
4062        if (filters == null) {
4063            throw new IllegalArgumentException();
4064        }
4065
4066        mFilters = filters;
4067
4068        if (mText instanceof Editable) {
4069            setFilters((Editable) mText, filters);
4070        }
4071    }
4072
4073    /**
4074     * Sets the list of input filters on the specified Editable,
4075     * and includes mInput in the list if it is an InputFilter.
4076     */
4077    private void setFilters(Editable e, InputFilter[] filters) {
4078        if (mInput instanceof InputFilter) {
4079            InputFilter[] nf = new InputFilter[filters.length + 1];
4080
4081            System.arraycopy(filters, 0, nf, 0, filters.length);
4082            nf[filters.length] = (InputFilter) mInput;
4083
4084            e.setFilters(nf);
4085        } else {
4086            e.setFilters(filters);
4087        }
4088    }
4089
4090    /**
4091     * Returns the current list of input filters.
4092     */
4093    public InputFilter[] getFilters() {
4094        return mFilters;
4095    }
4096
4097    /////////////////////////////////////////////////////////////////////////
4098
4099    private int getVerticalOffset(boolean forceNormal) {
4100        int voffset = 0;
4101        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4102
4103        Layout l = mLayout;
4104        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4105            l = mHintLayout;
4106        }
4107
4108        if (gravity != Gravity.TOP) {
4109            int boxht;
4110
4111            if (l == mHintLayout) {
4112                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4113                        getCompoundPaddingBottom();
4114            } else {
4115                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4116                        getExtendedPaddingBottom();
4117            }
4118            int textht = l.getHeight();
4119
4120            if (textht < boxht) {
4121                if (gravity == Gravity.BOTTOM)
4122                    voffset = boxht - textht;
4123                else // (gravity == Gravity.CENTER_VERTICAL)
4124                    voffset = (boxht - textht) >> 1;
4125            }
4126        }
4127        return voffset;
4128    }
4129
4130    private int getBottomVerticalOffset(boolean forceNormal) {
4131        int voffset = 0;
4132        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4133
4134        Layout l = mLayout;
4135        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4136            l = mHintLayout;
4137        }
4138
4139        if (gravity != Gravity.BOTTOM) {
4140            int boxht;
4141
4142            if (l == mHintLayout) {
4143                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4144                        getCompoundPaddingBottom();
4145            } else {
4146                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4147                        getExtendedPaddingBottom();
4148            }
4149            int textht = l.getHeight();
4150
4151            if (textht < boxht) {
4152                if (gravity == Gravity.TOP)
4153                    voffset = boxht - textht;
4154                else // (gravity == Gravity.CENTER_VERTICAL)
4155                    voffset = (boxht - textht) >> 1;
4156            }
4157        }
4158        return voffset;
4159    }
4160
4161    private void invalidateCursorPath() {
4162        if (mHighlightPathBogus) {
4163            invalidateCursor();
4164        } else {
4165            final int horizontalPadding = getCompoundPaddingLeft();
4166            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4167
4168            if (mCursorCount == 0) {
4169                synchronized (sTempRect) {
4170                    /*
4171                     * The reason for this concern about the thickness of the
4172                     * cursor and doing the floor/ceil on the coordinates is that
4173                     * some EditTexts (notably textfields in the Browser) have
4174                     * anti-aliased text where not all the characters are
4175                     * necessarily at integer-multiple locations.  This should
4176                     * make sure the entire cursor gets invalidated instead of
4177                     * sometimes missing half a pixel.
4178                     */
4179                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4180                    if (thick < 1.0f) {
4181                        thick = 1.0f;
4182                    }
4183
4184                    thick /= 2.0f;
4185
4186                    mHighlightPath.computeBounds(sTempRect, false);
4187
4188                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4189                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4190                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4191                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4192                }
4193            } else {
4194                for (int i = 0; i < mCursorCount; i++) {
4195                    Rect bounds = mCursorDrawable[i].getBounds();
4196                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4197                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4198                }
4199            }
4200        }
4201    }
4202
4203    private void invalidateCursor() {
4204        int where = getSelectionEnd();
4205
4206        invalidateCursor(where, where, where);
4207    }
4208
4209    private void invalidateCursor(int a, int b, int c) {
4210        if (mLayout == null) {
4211            invalidate();
4212        } else {
4213            if (a >= 0 || b >= 0 || c >= 0) {
4214                int first = Math.min(Math.min(a, b), c);
4215                int last = Math.max(Math.max(a, b), c);
4216
4217                int line = mLayout.getLineForOffset(first);
4218                int top = mLayout.getLineTop(line);
4219
4220                // This is ridiculous, but the descent from the line above
4221                // can hang down into the line we really want to redraw,
4222                // so we have to invalidate part of the line above to make
4223                // sure everything that needs to be redrawn really is.
4224                // (But not the whole line above, because that would cause
4225                // the same problem with the descenders on the line above it!)
4226                if (line > 0) {
4227                    top -= mLayout.getLineDescent(line - 1);
4228                }
4229
4230                int line2;
4231
4232                if (first == last)
4233                    line2 = line;
4234                else
4235                    line2 = mLayout.getLineForOffset(last);
4236
4237                int bottom = mLayout.getLineTop(line2 + 1);
4238
4239                final int horizontalPadding = getCompoundPaddingLeft();
4240                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4241
4242                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4243                // the invalidated lines specified above.
4244                for (int i = 0; i < mCursorCount; i++) {
4245                    Rect bounds = mCursorDrawable[i].getBounds();
4246                    top = Math.min(top, bounds.top);
4247                    bottom = Math.max(bottom, bounds.bottom);
4248                    // Horizontal bounds are already full width, no need to update
4249                }
4250
4251                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4252                        horizontalPadding + mScrollX + getWidth() -
4253                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4254                        bottom + verticalPadding);
4255            }
4256        }
4257    }
4258
4259    private void registerForPreDraw() {
4260        final ViewTreeObserver observer = getViewTreeObserver();
4261
4262        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4263            observer.addOnPreDrawListener(this);
4264            mPreDrawState = PREDRAW_PENDING;
4265        } else if (mPreDrawState == PREDRAW_DONE) {
4266            mPreDrawState = PREDRAW_PENDING;
4267        }
4268
4269        // else state is PREDRAW_PENDING, so keep waiting.
4270    }
4271
4272    /**
4273     * {@inheritDoc}
4274     */
4275    public boolean onPreDraw() {
4276        if (mPreDrawState != PREDRAW_PENDING) {
4277            return true;
4278        }
4279
4280        if (mLayout == null) {
4281            assumeLayout();
4282        }
4283
4284        boolean changed = false;
4285
4286        if (mMovement != null) {
4287            /* This code also provides auto-scrolling when a cursor is moved using a
4288             * CursorController (insertion point or selection limits).
4289             * For selection, ensure start or end is visible depending on controller's state.
4290             */
4291            int curs = getSelectionEnd();
4292            // Do not create the controller if it is not already created.
4293            if (mSelectionModifierCursorController != null &&
4294                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4295                curs = getSelectionStart();
4296            }
4297
4298            /*
4299             * TODO: This should really only keep the end in view if
4300             * it already was before the text changed.  I'm not sure
4301             * of a good way to tell from here if it was.
4302             */
4303            if (curs < 0 &&
4304                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4305                curs = mText.length();
4306            }
4307
4308            if (curs >= 0) {
4309                changed = bringPointIntoView(curs);
4310            }
4311        } else {
4312            changed = bringTextIntoView();
4313        }
4314
4315        // This has to be checked here since:
4316        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4317        //   a screen rotation) since layout is not yet initialized at that point.
4318        if (mCreatedWithASelection) {
4319            startSelectionActionMode();
4320            mCreatedWithASelection = false;
4321        }
4322
4323        // Phone specific code (there is no ExtractEditText on tablets).
4324        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4325        // not be set. Do the test here instead.
4326        if (this instanceof ExtractEditText && hasSelection()) {
4327            startSelectionActionMode();
4328        }
4329
4330        mPreDrawState = PREDRAW_DONE;
4331        return !changed;
4332    }
4333
4334    @Override
4335    protected void onAttachedToWindow() {
4336        super.onAttachedToWindow();
4337
4338        mTemporaryDetach = false;
4339
4340        if (mShowErrorAfterAttach) {
4341            showError();
4342            mShowErrorAfterAttach = false;
4343        }
4344
4345        final ViewTreeObserver observer = getViewTreeObserver();
4346        // No need to create the controller.
4347        // The get method will add the listener on controller creation.
4348        if (mInsertionPointCursorController != null) {
4349            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4350        }
4351        if (mSelectionModifierCursorController != null) {
4352            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4353        }
4354
4355        // Resolve drawables as the layout direction has been resolved
4356        resolveDrawables();
4357    }
4358
4359    @Override
4360    protected void onDetachedFromWindow() {
4361        super.onDetachedFromWindow();
4362
4363        final ViewTreeObserver observer = getViewTreeObserver();
4364        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4365            observer.removeOnPreDrawListener(this);
4366            mPreDrawState = PREDRAW_NOT_REGISTERED;
4367        }
4368
4369        if (mError != null) {
4370            hideError();
4371        }
4372
4373        if (mBlink != null) {
4374            mBlink.removeCallbacks(mBlink);
4375        }
4376
4377        if (mInsertionPointCursorController != null) {
4378            mInsertionPointCursorController.onDetached();
4379        }
4380
4381        if (mSelectionModifierCursorController != null) {
4382            mSelectionModifierCursorController.onDetached();
4383        }
4384
4385        hideControllers();
4386
4387        resetResolvedDrawables();
4388    }
4389
4390    @Override
4391    protected boolean isPaddingOffsetRequired() {
4392        return mShadowRadius != 0 || mDrawables != null;
4393    }
4394
4395    @Override
4396    protected int getLeftPaddingOffset() {
4397        return getCompoundPaddingLeft() - mPaddingLeft +
4398                (int) Math.min(0, mShadowDx - mShadowRadius);
4399    }
4400
4401    @Override
4402    protected int getTopPaddingOffset() {
4403        return (int) Math.min(0, mShadowDy - mShadowRadius);
4404    }
4405
4406    @Override
4407    protected int getBottomPaddingOffset() {
4408        return (int) Math.max(0, mShadowDy + mShadowRadius);
4409    }
4410
4411    @Override
4412    protected int getRightPaddingOffset() {
4413        return -(getCompoundPaddingRight() - mPaddingRight) +
4414                (int) Math.max(0, mShadowDx + mShadowRadius);
4415    }
4416
4417    @Override
4418    protected boolean verifyDrawable(Drawable who) {
4419        final boolean verified = super.verifyDrawable(who);
4420        if (!verified && mDrawables != null) {
4421            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4422                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4423                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4424        }
4425        return verified;
4426    }
4427
4428    @Override
4429    public void jumpDrawablesToCurrentState() {
4430        super.jumpDrawablesToCurrentState();
4431        if (mDrawables != null) {
4432            if (mDrawables.mDrawableLeft != null) {
4433                mDrawables.mDrawableLeft.jumpToCurrentState();
4434            }
4435            if (mDrawables.mDrawableTop != null) {
4436                mDrawables.mDrawableTop.jumpToCurrentState();
4437            }
4438            if (mDrawables.mDrawableRight != null) {
4439                mDrawables.mDrawableRight.jumpToCurrentState();
4440            }
4441            if (mDrawables.mDrawableBottom != null) {
4442                mDrawables.mDrawableBottom.jumpToCurrentState();
4443            }
4444            if (mDrawables.mDrawableStart != null) {
4445                mDrawables.mDrawableStart.jumpToCurrentState();
4446            }
4447            if (mDrawables.mDrawableEnd != null) {
4448                mDrawables.mDrawableEnd.jumpToCurrentState();
4449            }
4450        }
4451    }
4452
4453    @Override
4454    public void invalidateDrawable(Drawable drawable) {
4455        if (verifyDrawable(drawable)) {
4456            final Rect dirty = drawable.getBounds();
4457            int scrollX = mScrollX;
4458            int scrollY = mScrollY;
4459
4460            // IMPORTANT: The coordinates below are based on the coordinates computed
4461            // for each compound drawable in onDraw(). Make sure to update each section
4462            // accordingly.
4463            final TextView.Drawables drawables = mDrawables;
4464            if (drawables != null) {
4465                if (drawable == drawables.mDrawableLeft) {
4466                    final int compoundPaddingTop = getCompoundPaddingTop();
4467                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4468                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4469
4470                    scrollX += mPaddingLeft;
4471                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4472                } else if (drawable == drawables.mDrawableRight) {
4473                    final int compoundPaddingTop = getCompoundPaddingTop();
4474                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4475                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4476
4477                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4478                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4479                } else if (drawable == drawables.mDrawableTop) {
4480                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4481                    final int compoundPaddingRight = getCompoundPaddingRight();
4482                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4483
4484                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4485                    scrollY += mPaddingTop;
4486                } else if (drawable == drawables.mDrawableBottom) {
4487                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4488                    final int compoundPaddingRight = getCompoundPaddingRight();
4489                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4490
4491                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4492                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4493                }
4494            }
4495
4496            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4497                    dirty.right + scrollX, dirty.bottom + scrollY);
4498        }
4499    }
4500
4501    /**
4502     * @hide
4503     */
4504    @Override
4505    public int getResolvedLayoutDirection(Drawable who) {
4506        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4507        if (mDrawables != null) {
4508            final Drawables drawables = mDrawables;
4509            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4510                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4511                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4512                return getResolvedLayoutDirection();
4513            }
4514        }
4515        return super.getResolvedLayoutDirection(who);
4516    }
4517
4518    @Override
4519    protected boolean onSetAlpha(int alpha) {
4520        // Alpha is supported if and only if the drawing can be done in one pass.
4521        // TODO text with spans with a background color currently do not respect this alpha.
4522        if (getBackground() == null) {
4523            mCurrentAlpha = alpha;
4524            final Drawables dr = mDrawables;
4525            if (dr != null) {
4526                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4527                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4528                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4529                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4530                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4531                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4532            }
4533            return true;
4534        }
4535
4536        mCurrentAlpha = 255;
4537        return false;
4538    }
4539
4540    /**
4541     * When a TextView is used to display a useful piece of information to the user (such as a
4542     * contact's address), it should be made selectable, so that the user can select and copy this
4543     * content.
4544     *
4545     * Use {@link #setTextIsSelectable(boolean)} or the
4546     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4547     * selectable (text is not selectable by default).
4548     *
4549     * Note that this method simply returns the state of this flag. Although this flag has to be set
4550     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4551     * always be selected, independently of the value of this flag.
4552     *
4553     * @return True if the text displayed in this TextView can be selected by the user.
4554     *
4555     * @attr ref android.R.styleable#TextView_textIsSelectable
4556     */
4557    public boolean isTextSelectable() {
4558        return mTextIsSelectable;
4559    }
4560
4561    /**
4562     * Sets whether or not (default) the content of this view is selectable by the user.
4563     *
4564     * Note that this methods affect the {@link #setFocusable(boolean)},
4565     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4566     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4567     * customized.
4568     *
4569     * See {@link #isTextSelectable} for details.
4570     *
4571     * @param selectable Whether or not the content of this TextView should be selectable.
4572     */
4573    public void setTextIsSelectable(boolean selectable) {
4574        if (mTextIsSelectable == selectable) return;
4575
4576        mTextIsSelectable = selectable;
4577
4578        setFocusableInTouchMode(selectable);
4579        setFocusable(selectable);
4580        setClickable(selectable);
4581        setLongClickable(selectable);
4582
4583        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4584
4585        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4586        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4587
4588        // Called by setText above, but safer in case of future code changes
4589        prepareCursorControllers();
4590    }
4591
4592    @Override
4593    protected int[] onCreateDrawableState(int extraSpace) {
4594        final int[] drawableState;
4595
4596        if (mSingleLine) {
4597            drawableState = super.onCreateDrawableState(extraSpace);
4598        } else {
4599            drawableState = super.onCreateDrawableState(extraSpace + 1);
4600            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4601        }
4602
4603        if (mTextIsSelectable) {
4604            // Disable pressed state, which was introduced when TextView was made clickable.
4605            // Prevents text color change.
4606            // setClickable(false) would have a similar effect, but it also disables focus changes
4607            // and long press actions, which are both needed by text selection.
4608            final int length = drawableState.length;
4609            for (int i = 0; i < length; i++) {
4610                if (drawableState[i] == R.attr.state_pressed) {
4611                    final int[] nonPressedState = new int[length - 1];
4612                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4613                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4614                    return nonPressedState;
4615                }
4616            }
4617        }
4618
4619        return drawableState;
4620    }
4621
4622    @Override
4623    protected void onDraw(Canvas canvas) {
4624        if (mPreDrawState == PREDRAW_DONE) {
4625            final ViewTreeObserver observer = getViewTreeObserver();
4626            observer.removeOnPreDrawListener(this);
4627            mPreDrawState = PREDRAW_NOT_REGISTERED;
4628        }
4629
4630        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4631
4632        restartMarqueeIfNeeded();
4633
4634        // Draw the background for this view
4635        super.onDraw(canvas);
4636
4637        final int compoundPaddingLeft = getCompoundPaddingLeft();
4638        final int compoundPaddingTop = getCompoundPaddingTop();
4639        final int compoundPaddingRight = getCompoundPaddingRight();
4640        final int compoundPaddingBottom = getCompoundPaddingBottom();
4641        final int scrollX = mScrollX;
4642        final int scrollY = mScrollY;
4643        final int right = mRight;
4644        final int left = mLeft;
4645        final int bottom = mBottom;
4646        final int top = mTop;
4647
4648        final Drawables dr = mDrawables;
4649        if (dr != null) {
4650            /*
4651             * Compound, not extended, because the icon is not clipped
4652             * if the text height is smaller.
4653             */
4654
4655            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4656            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4657
4658            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4659            // Make sure to update invalidateDrawable() when changing this code.
4660            if (dr.mDrawableLeft != null) {
4661                canvas.save();
4662                canvas.translate(scrollX + mPaddingLeft,
4663                                 scrollY + compoundPaddingTop +
4664                                 (vspace - dr.mDrawableHeightLeft) / 2);
4665                dr.mDrawableLeft.draw(canvas);
4666                canvas.restore();
4667            }
4668
4669            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4670            // Make sure to update invalidateDrawable() when changing this code.
4671            if (dr.mDrawableRight != null) {
4672                canvas.save();
4673                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4674                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4675                dr.mDrawableRight.draw(canvas);
4676                canvas.restore();
4677            }
4678
4679            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4680            // Make sure to update invalidateDrawable() when changing this code.
4681            if (dr.mDrawableTop != null) {
4682                canvas.save();
4683                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4684                        scrollY + mPaddingTop);
4685                dr.mDrawableTop.draw(canvas);
4686                canvas.restore();
4687            }
4688
4689            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4690            // Make sure to update invalidateDrawable() when changing this code.
4691            if (dr.mDrawableBottom != null) {
4692                canvas.save();
4693                canvas.translate(scrollX + compoundPaddingLeft +
4694                        (hspace - dr.mDrawableWidthBottom) / 2,
4695                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4696                dr.mDrawableBottom.draw(canvas);
4697                canvas.restore();
4698            }
4699        }
4700
4701        int color = mCurTextColor;
4702
4703        if (mLayout == null) {
4704            assumeLayout();
4705        }
4706
4707        Layout layout = mLayout;
4708        int cursorcolor = color;
4709
4710        if (mHint != null && mText.length() == 0) {
4711            if (mHintTextColor != null) {
4712                color = mCurHintTextColor;
4713            }
4714
4715            layout = mHintLayout;
4716        }
4717
4718        mTextPaint.setColor(color);
4719        if (mCurrentAlpha != 255) {
4720            // If set, the alpha will override the color's alpha. Multiply the alphas.
4721            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4722        }
4723        mTextPaint.drawableState = getDrawableState();
4724
4725        canvas.save();
4726        /*  Would be faster if we didn't have to do this. Can we chop the
4727            (displayable) text so that we don't need to do this ever?
4728        */
4729
4730        int extendedPaddingTop = getExtendedPaddingTop();
4731        int extendedPaddingBottom = getExtendedPaddingBottom();
4732
4733        float clipLeft = compoundPaddingLeft + scrollX;
4734        float clipTop = extendedPaddingTop + scrollY;
4735        float clipRight = right - left - compoundPaddingRight + scrollX;
4736        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4737
4738        if (mShadowRadius != 0) {
4739            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4740            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4741
4742            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4743            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4744        }
4745
4746        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4747
4748        int voffsetText = 0;
4749        int voffsetCursor = 0;
4750
4751        // translate in by our padding
4752        {
4753            /* shortcircuit calling getVerticaOffset() */
4754            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4755                voffsetText = getVerticalOffset(false);
4756                voffsetCursor = getVerticalOffset(true);
4757            }
4758            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4759        }
4760
4761        final int layoutDirection = getResolvedLayoutDirection();
4762        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4763        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4764            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4765                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4766                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4767                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4768            }
4769
4770            if (mMarquee != null && mMarquee.isRunning()) {
4771                canvas.translate(-mMarquee.mScroll, 0.0f);
4772            }
4773        }
4774
4775        Path highlight = null;
4776        int selStart = -1, selEnd = -1;
4777        boolean drawCursor = false;
4778
4779        //  If there is no movement method, then there can be no selection.
4780        //  Check that first and attempt to skip everything having to do with
4781        //  the cursor.
4782        //  XXX This is not strictly true -- a program could set the
4783        //  selection manually if it really wanted to.
4784        if (mMovement != null && (isFocused() || isPressed())) {
4785            selStart = getSelectionStart();
4786            selEnd = getSelectionEnd();
4787
4788            if (selStart >= 0) {
4789                if (mHighlightPath == null)
4790                    mHighlightPath = new Path();
4791
4792                if (selStart == selEnd) {
4793                    if (isCursorVisible() &&
4794                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4795                        if (mHighlightPathBogus) {
4796                            mHighlightPath.reset();
4797                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4798                            updateCursorsPositions();
4799                            mHighlightPathBogus = false;
4800                        }
4801
4802                        // XXX should pass to skin instead of drawing directly
4803                        mHighlightPaint.setColor(cursorcolor);
4804                        if (mCurrentAlpha != 255) {
4805                            mHighlightPaint.setAlpha(
4806                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4807                        }
4808                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4809                        highlight = mHighlightPath;
4810                        drawCursor = mCursorCount > 0;
4811                    }
4812                } else if (textCanBeSelected()) {
4813                    if (mHighlightPathBogus) {
4814                        mHighlightPath.reset();
4815                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4816                        mHighlightPathBogus = false;
4817                    }
4818
4819                    // XXX should pass to skin instead of drawing directly
4820                    mHighlightPaint.setColor(mHighlightColor);
4821                    if (mCurrentAlpha != 255) {
4822                        mHighlightPaint.setAlpha(
4823                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4824                    }
4825                    mHighlightPaint.setStyle(Paint.Style.FILL);
4826
4827                    highlight = mHighlightPath;
4828                }
4829            }
4830        }
4831
4832        /*  Comment out until we decide what to do about animations
4833        boolean isLinearTextOn = false;
4834        if (currentTransformation != null) {
4835            isLinearTextOn = mTextPaint.isLinearTextOn();
4836            Matrix m = currentTransformation.getMatrix();
4837            if (!m.isIdentity()) {
4838                // mTextPaint.setLinearTextOn(true);
4839            }
4840        }
4841        */
4842
4843        final InputMethodState ims = mInputMethodState;
4844        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4845        if (ims != null && ims.mBatchEditNesting == 0) {
4846            InputMethodManager imm = InputMethodManager.peekInstance();
4847            if (imm != null) {
4848                if (imm.isActive(this)) {
4849                    boolean reported = false;
4850                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4851                        // We are in extract mode and the content has changed
4852                        // in some way... just report complete new text to the
4853                        // input method.
4854                        reported = reportExtractedText();
4855                    }
4856                    if (!reported && highlight != null) {
4857                        int candStart = -1;
4858                        int candEnd = -1;
4859                        if (mText instanceof Spannable) {
4860                            Spannable sp = (Spannable)mText;
4861                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4862                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4863                        }
4864                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4865                    }
4866                }
4867
4868                if (imm.isWatchingCursor(this) && highlight != null) {
4869                    highlight.computeBounds(ims.mTmpRectF, true);
4870                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4871
4872                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4873                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4874
4875                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4876
4877                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4878                            (int)(ims.mTmpRectF.top + 0.5),
4879                            (int)(ims.mTmpRectF.right + 0.5),
4880                            (int)(ims.mTmpRectF.bottom + 0.5));
4881
4882                    imm.updateCursor(this,
4883                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4884                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4885                }
4886            }
4887        }
4888
4889        if (mCorrectionHighlighter != null) {
4890            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4891        }
4892
4893        if (drawCursor) {
4894            drawCursor(canvas, cursorOffsetVertical);
4895            // Rely on the drawable entirely, do not draw the cursor line.
4896            // Has to be done after the IMM related code above which relies on the highlight.
4897            highlight = null;
4898        }
4899
4900        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4901
4902        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4903            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4904            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4905        }
4906
4907        /*  Comment out until we decide what to do about animations
4908        if (currentTransformation != null) {
4909            mTextPaint.setLinearTextOn(isLinearTextOn);
4910        }
4911        */
4912
4913        canvas.restore();
4914    }
4915
4916    private void updateCursorsPositions() {
4917        if (mCursorDrawableRes == 0) {
4918            mCursorCount = 0;
4919            return;
4920        }
4921
4922        final int offset = getSelectionStart();
4923        final int line = mLayout.getLineForOffset(offset);
4924        final int top = mLayout.getLineTop(line);
4925        final int bottom = mLayout.getLineTop(line + 1);
4926
4927        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4928
4929        int middle = bottom;
4930        if (mCursorCount == 2) {
4931            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4932            middle = (top + bottom) >> 1;
4933        }
4934
4935        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4936
4937        if (mCursorCount == 2) {
4938            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4939        }
4940    }
4941
4942    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4943        if (mCursorDrawable[cursorIndex] == null)
4944            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4945
4946        if (mTempRect == null) mTempRect = new Rect();
4947
4948        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4949        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4950        horizontal = Math.max(0.5f, horizontal - 0.5f);
4951        final int left = (int) (horizontal) - mTempRect.left;
4952        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4953                bottom + mTempRect.bottom);
4954    }
4955
4956    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4957        final boolean translate = cursorOffsetVertical != 0;
4958        if (translate) canvas.translate(0, cursorOffsetVertical);
4959        for (int i = 0; i < mCursorCount; i++) {
4960            mCursorDrawable[i].draw(canvas);
4961        }
4962        if (translate) canvas.translate(0, -cursorOffsetVertical);
4963    }
4964
4965    @Override
4966    public void getFocusedRect(Rect r) {
4967        if (mLayout == null) {
4968            super.getFocusedRect(r);
4969            return;
4970        }
4971
4972        int sel = getSelectionEnd();
4973        if (sel < 0) {
4974            super.getFocusedRect(r);
4975            return;
4976        }
4977
4978        int line = mLayout.getLineForOffset(sel);
4979        r.top = mLayout.getLineTop(line);
4980        r.bottom = mLayout.getLineBottom(line);
4981
4982        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4983        r.right = r.left + 1;
4984
4985        // Adjust for padding and gravity.
4986        int paddingLeft = getCompoundPaddingLeft();
4987        int paddingTop = getExtendedPaddingTop();
4988        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4989            paddingTop += getVerticalOffset(false);
4990        }
4991        r.offset(paddingLeft, paddingTop);
4992    }
4993
4994    /**
4995     * Return the number of lines of text, or 0 if the internal Layout has not
4996     * been built.
4997     */
4998    public int getLineCount() {
4999        return mLayout != null ? mLayout.getLineCount() : 0;
5000    }
5001
5002    /**
5003     * Return the baseline for the specified line (0...getLineCount() - 1)
5004     * If bounds is not null, return the top, left, right, bottom extents
5005     * of the specified line in it. If the internal Layout has not been built,
5006     * return 0 and set bounds to (0, 0, 0, 0)
5007     * @param line which line to examine (0..getLineCount() - 1)
5008     * @param bounds Optional. If not null, it returns the extent of the line
5009     * @return the Y-coordinate of the baseline
5010     */
5011    public int getLineBounds(int line, Rect bounds) {
5012        if (mLayout == null) {
5013            if (bounds != null) {
5014                bounds.set(0, 0, 0, 0);
5015            }
5016            return 0;
5017        }
5018        else {
5019            int baseline = mLayout.getLineBounds(line, bounds);
5020
5021            int voffset = getExtendedPaddingTop();
5022            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5023                voffset += getVerticalOffset(true);
5024            }
5025            if (bounds != null) {
5026                bounds.offset(getCompoundPaddingLeft(), voffset);
5027            }
5028            return baseline + voffset;
5029        }
5030    }
5031
5032    @Override
5033    public int getBaseline() {
5034        if (mLayout == null) {
5035            return super.getBaseline();
5036        }
5037
5038        int voffset = 0;
5039        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5040            voffset = getVerticalOffset(true);
5041        }
5042
5043        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5044    }
5045
5046    /**
5047     * @hide
5048     * @param offsetRequired
5049     */
5050    @Override
5051    protected int getFadeTop(boolean offsetRequired) {
5052        if (mLayout == null) return 0;
5053
5054        int voffset = 0;
5055        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5056            voffset = getVerticalOffset(true);
5057        }
5058
5059        if (offsetRequired) voffset += getTopPaddingOffset();
5060
5061        return getExtendedPaddingTop() + voffset;
5062    }
5063
5064    /**
5065     * @hide
5066     * @param offsetRequired
5067     */
5068    @Override
5069    protected int getFadeHeight(boolean offsetRequired) {
5070        return mLayout != null ? mLayout.getHeight() : 0;
5071    }
5072
5073    @Override
5074    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5075        if (keyCode == KeyEvent.KEYCODE_BACK) {
5076            boolean areSuggestionsShown = areSuggestionsShown();
5077            boolean isInSelectionMode = mSelectionActionMode != null;
5078
5079            if (areSuggestionsShown || isInSelectionMode) {
5080                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5081                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5082                    if (state != null) {
5083                        state.startTracking(event, this);
5084                    }
5085                    return true;
5086                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5087                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5088                    if (state != null) {
5089                        state.handleUpEvent(event);
5090                    }
5091                    if (event.isTracking() && !event.isCanceled()) {
5092                        if (areSuggestionsShown) {
5093                            hideSuggestions();
5094                            return true;
5095                        }
5096                        if (isInSelectionMode) {
5097                            stopSelectionActionMode();
5098                            return true;
5099                        }
5100                    }
5101                }
5102            }
5103        }
5104        return super.onKeyPreIme(keyCode, event);
5105    }
5106
5107    @Override
5108    public boolean onKeyDown(int keyCode, KeyEvent event) {
5109        int which = doKeyDown(keyCode, event, null);
5110        if (which == 0) {
5111            // Go through default dispatching.
5112            return super.onKeyDown(keyCode, event);
5113        }
5114
5115        return true;
5116    }
5117
5118    @Override
5119    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5120        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5121
5122        int which = doKeyDown(keyCode, down, event);
5123        if (which == 0) {
5124            // Go through default dispatching.
5125            return super.onKeyMultiple(keyCode, repeatCount, event);
5126        }
5127        if (which == -1) {
5128            // Consumed the whole thing.
5129            return true;
5130        }
5131
5132        repeatCount--;
5133
5134        // We are going to dispatch the remaining events to either the input
5135        // or movement method.  To do this, we will just send a repeated stream
5136        // of down and up events until we have done the complete repeatCount.
5137        // It would be nice if those interfaces had an onKeyMultiple() method,
5138        // but adding that is a more complicated change.
5139        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5140        if (which == 1) {
5141            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5142            while (--repeatCount > 0) {
5143                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5144                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5145            }
5146            hideErrorIfUnchanged();
5147
5148        } else if (which == 2) {
5149            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5150            while (--repeatCount > 0) {
5151                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5152                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5153            }
5154        }
5155
5156        return true;
5157    }
5158
5159    /**
5160     * Returns true if pressing ENTER in this field advances focus instead
5161     * of inserting the character.  This is true mostly in single-line fields,
5162     * but also in mail addresses and subjects which will display on multiple
5163     * lines but where it doesn't make sense to insert newlines.
5164     */
5165    private boolean shouldAdvanceFocusOnEnter() {
5166        if (mInput == null) {
5167            return false;
5168        }
5169
5170        if (mSingleLine) {
5171            return true;
5172        }
5173
5174        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5175            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5176            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5177                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5178                return true;
5179            }
5180        }
5181
5182        return false;
5183    }
5184
5185    /**
5186     * Returns true if pressing TAB in this field advances focus instead
5187     * of inserting the character.  Insert tabs only in multi-line editors.
5188     */
5189    private boolean shouldAdvanceFocusOnTab() {
5190        if (mInput != null && !mSingleLine) {
5191            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5192                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5193                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5194                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5195                    return false;
5196                }
5197            }
5198        }
5199        return true;
5200    }
5201
5202    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5203        if (!isEnabled()) {
5204            return 0;
5205        }
5206
5207        switch (keyCode) {
5208            case KeyEvent.KEYCODE_ENTER:
5209                mEnterKeyIsDown = true;
5210                if (event.hasNoModifiers()) {
5211                    // When mInputContentType is set, we know that we are
5212                    // running in a "modern" cupcake environment, so don't need
5213                    // to worry about the application trying to capture
5214                    // enter key events.
5215                    if (mInputContentType != null) {
5216                        // If there is an action listener, given them a
5217                        // chance to consume the event.
5218                        if (mInputContentType.onEditorActionListener != null &&
5219                                mInputContentType.onEditorActionListener.onEditorAction(
5220                                this, EditorInfo.IME_NULL, event)) {
5221                            mInputContentType.enterDown = true;
5222                            // We are consuming the enter key for them.
5223                            return -1;
5224                        }
5225                    }
5226
5227                    // If our editor should move focus when enter is pressed, or
5228                    // this is a generated event from an IME action button, then
5229                    // don't let it be inserted into the text.
5230                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5231                            || shouldAdvanceFocusOnEnter()) {
5232                        if (mOnClickListener != null) {
5233                            return 0;
5234                        }
5235                        return -1;
5236                    }
5237                }
5238                break;
5239
5240            case KeyEvent.KEYCODE_DPAD_CENTER:
5241                mDPadCenterIsDown = true;
5242                if (event.hasNoModifiers()) {
5243                    if (shouldAdvanceFocusOnEnter()) {
5244                        return 0;
5245                    }
5246                }
5247                break;
5248
5249            case KeyEvent.KEYCODE_TAB:
5250                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5251                    if (shouldAdvanceFocusOnTab()) {
5252                        return 0;
5253                    }
5254                }
5255                break;
5256
5257                // Has to be done on key down (and not on key up) to correctly be intercepted.
5258            case KeyEvent.KEYCODE_BACK:
5259                if (areSuggestionsShown()) {
5260                    hideSuggestions();
5261                    return -1;
5262                }
5263                if (mSelectionActionMode != null) {
5264                    stopSelectionActionMode();
5265                    return -1;
5266                }
5267                break;
5268        }
5269
5270        if (mInput != null) {
5271            resetErrorChangedFlag();
5272
5273            boolean doDown = true;
5274            if (otherEvent != null) {
5275                try {
5276                    beginBatchEdit();
5277                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5278                    hideErrorIfUnchanged();
5279                    doDown = false;
5280                    if (handled) {
5281                        return -1;
5282                    }
5283                } catch (AbstractMethodError e) {
5284                    // onKeyOther was added after 1.0, so if it isn't
5285                    // implemented we need to try to dispatch as a regular down.
5286                } finally {
5287                    endBatchEdit();
5288                }
5289            }
5290
5291            if (doDown) {
5292                beginBatchEdit();
5293                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5294                endBatchEdit();
5295                hideErrorIfUnchanged();
5296                if (handled) return 1;
5297            }
5298        }
5299
5300        // bug 650865: sometimes we get a key event before a layout.
5301        // don't try to move around if we don't know the layout.
5302
5303        if (mMovement != null && mLayout != null) {
5304            boolean doDown = true;
5305            if (otherEvent != null) {
5306                try {
5307                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5308                            otherEvent);
5309                    doDown = false;
5310                    if (handled) {
5311                        return -1;
5312                    }
5313                } catch (AbstractMethodError e) {
5314                    // onKeyOther was added after 1.0, so if it isn't
5315                    // implemented we need to try to dispatch as a regular down.
5316                }
5317            }
5318            if (doDown) {
5319                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5320                    return 2;
5321            }
5322        }
5323
5324        return 0;
5325    }
5326
5327    /**
5328     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5329     * can be recorded.
5330     * @hide
5331     */
5332    public void resetErrorChangedFlag() {
5333        /*
5334         * Keep track of what the error was before doing the input
5335         * so that if an input filter changed the error, we leave
5336         * that error showing.  Otherwise, we take down whatever
5337         * error was showing when the user types something.
5338         */
5339        mErrorWasChanged = false;
5340    }
5341
5342    /**
5343     * @hide
5344     */
5345    public void hideErrorIfUnchanged() {
5346        if (mError != null && !mErrorWasChanged) {
5347            setError(null, null);
5348        }
5349    }
5350
5351    @Override
5352    public boolean onKeyUp(int keyCode, KeyEvent event) {
5353        if (!isEnabled()) {
5354            return super.onKeyUp(keyCode, event);
5355        }
5356
5357        switch (keyCode) {
5358            case KeyEvent.KEYCODE_DPAD_CENTER:
5359                mDPadCenterIsDown = false;
5360                if (event.hasNoModifiers()) {
5361                    /*
5362                     * If there is a click listener, just call through to
5363                     * super, which will invoke it.
5364                     *
5365                     * If there isn't a click listener, try to show the soft
5366                     * input method.  (It will also
5367                     * call performClick(), but that won't do anything in
5368                     * this case.)
5369                     */
5370                    if (mOnClickListener == null) {
5371                        if (mMovement != null && mText instanceof Editable
5372                                && mLayout != null && onCheckIsTextEditor()) {
5373                            InputMethodManager imm = InputMethodManager.peekInstance();
5374                            if (imm != null) {
5375                                imm.viewClicked(this);
5376                                imm.showSoftInput(this, 0);
5377                            }
5378                        }
5379                    }
5380                }
5381                return super.onKeyUp(keyCode, event);
5382
5383            case KeyEvent.KEYCODE_ENTER:
5384                mEnterKeyIsDown = false;
5385                if (event.hasNoModifiers()) {
5386                    if (mInputContentType != null
5387                            && mInputContentType.onEditorActionListener != null
5388                            && mInputContentType.enterDown) {
5389                        mInputContentType.enterDown = false;
5390                        if (mInputContentType.onEditorActionListener.onEditorAction(
5391                                this, EditorInfo.IME_NULL, event)) {
5392                            return true;
5393                        }
5394                    }
5395
5396                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5397                            || shouldAdvanceFocusOnEnter()) {
5398                        /*
5399                         * If there is a click listener, just call through to
5400                         * super, which will invoke it.
5401                         *
5402                         * If there isn't a click listener, try to advance focus,
5403                         * but still call through to super, which will reset the
5404                         * pressed state and longpress state.  (It will also
5405                         * call performClick(), but that won't do anything in
5406                         * this case.)
5407                         */
5408                        if (mOnClickListener == null) {
5409                            View v = focusSearch(FOCUS_DOWN);
5410
5411                            if (v != null) {
5412                                if (!v.requestFocus(FOCUS_DOWN)) {
5413                                    throw new IllegalStateException(
5414                                            "focus search returned a view " +
5415                                            "that wasn't able to take focus!");
5416                                }
5417
5418                                /*
5419                                 * Return true because we handled the key; super
5420                                 * will return false because there was no click
5421                                 * listener.
5422                                 */
5423                                super.onKeyUp(keyCode, event);
5424                                return true;
5425                            } else if ((event.getFlags()
5426                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5427                                // No target for next focus, but make sure the IME
5428                                // if this came from it.
5429                                InputMethodManager imm = InputMethodManager.peekInstance();
5430                                if (imm != null && imm.isActive(this)) {
5431                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5432                                }
5433                            }
5434                        }
5435                    }
5436                    return super.onKeyUp(keyCode, event);
5437                }
5438                break;
5439        }
5440
5441        if (mInput != null)
5442            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5443                return true;
5444
5445        if (mMovement != null && mLayout != null)
5446            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5447                return true;
5448
5449        return super.onKeyUp(keyCode, event);
5450    }
5451
5452    @Override public boolean onCheckIsTextEditor() {
5453        return mInputType != EditorInfo.TYPE_NULL;
5454    }
5455
5456    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5457        if (onCheckIsTextEditor() && isEnabled()) {
5458            if (mInputMethodState == null) {
5459                mInputMethodState = new InputMethodState();
5460            }
5461            outAttrs.inputType = mInputType;
5462            if (mInputContentType != null) {
5463                outAttrs.imeOptions = mInputContentType.imeOptions;
5464                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5465                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5466                outAttrs.actionId = mInputContentType.imeActionId;
5467                outAttrs.extras = mInputContentType.extras;
5468            } else {
5469                outAttrs.imeOptions = EditorInfo.IME_NULL;
5470            }
5471            if (focusSearch(FOCUS_DOWN) != null) {
5472                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5473            }
5474            if (focusSearch(FOCUS_UP) != null) {
5475                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5476            }
5477            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5478                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5479                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5480                    // An action has not been set, but the enter key will move to
5481                    // the next focus, so set the action to that.
5482                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5483                } else {
5484                    // An action has not been set, and there is no focus to move
5485                    // to, so let's just supply a "done" action.
5486                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5487                }
5488                if (!shouldAdvanceFocusOnEnter()) {
5489                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5490                }
5491            }
5492            if (isMultilineInputType(outAttrs.inputType)) {
5493                // Multi-line text editors should always show an enter key.
5494                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5495            }
5496            outAttrs.hintText = mHint;
5497            if (mText instanceof Editable) {
5498                InputConnection ic = new EditableInputConnection(this);
5499                outAttrs.initialSelStart = getSelectionStart();
5500                outAttrs.initialSelEnd = getSelectionEnd();
5501                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5502                return ic;
5503            }
5504        }
5505        return null;
5506    }
5507
5508    /**
5509     * If this TextView contains editable content, extract a portion of it
5510     * based on the information in <var>request</var> in to <var>outText</var>.
5511     * @return Returns true if the text was successfully extracted, else false.
5512     */
5513    public boolean extractText(ExtractedTextRequest request,
5514            ExtractedText outText) {
5515        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5516                EXTRACT_UNKNOWN, outText);
5517    }
5518
5519    static final int EXTRACT_NOTHING = -2;
5520    static final int EXTRACT_UNKNOWN = -1;
5521
5522    boolean extractTextInternal(ExtractedTextRequest request,
5523            int partialStartOffset, int partialEndOffset, int delta,
5524            ExtractedText outText) {
5525        final CharSequence content = mText;
5526        if (content != null) {
5527            if (partialStartOffset != EXTRACT_NOTHING) {
5528                final int N = content.length();
5529                if (partialStartOffset < 0) {
5530                    outText.partialStartOffset = outText.partialEndOffset = -1;
5531                    partialStartOffset = 0;
5532                    partialEndOffset = N;
5533                } else {
5534                    // Now use the delta to determine the actual amount of text
5535                    // we need.
5536                    partialEndOffset += delta;
5537                    // Adjust offsets to ensure we contain full spans.
5538                    if (content instanceof Spanned) {
5539                        Spanned spanned = (Spanned)content;
5540                        Object[] spans = spanned.getSpans(partialStartOffset,
5541                                partialEndOffset, ParcelableSpan.class);
5542                        int i = spans.length;
5543                        while (i > 0) {
5544                            i--;
5545                            int j = spanned.getSpanStart(spans[i]);
5546                            if (j < partialStartOffset) partialStartOffset = j;
5547                            j = spanned.getSpanEnd(spans[i]);
5548                            if (j > partialEndOffset) partialEndOffset = j;
5549                        }
5550                    }
5551                    outText.partialStartOffset = partialStartOffset;
5552                    outText.partialEndOffset = partialEndOffset - delta;
5553
5554                    if (partialStartOffset > N) {
5555                        partialStartOffset = N;
5556                    } else if (partialStartOffset < 0) {
5557                        partialStartOffset = 0;
5558                    }
5559                    if (partialEndOffset > N) {
5560                        partialEndOffset = N;
5561                    } else if (partialEndOffset < 0) {
5562                        partialEndOffset = 0;
5563                    }
5564                }
5565                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5566                    outText.text = content.subSequence(partialStartOffset,
5567                            partialEndOffset);
5568                } else {
5569                    outText.text = TextUtils.substring(content, partialStartOffset,
5570                            partialEndOffset);
5571                }
5572            } else {
5573                outText.partialStartOffset = 0;
5574                outText.partialEndOffset = 0;
5575                outText.text = "";
5576            }
5577            outText.flags = 0;
5578            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5579                outText.flags |= ExtractedText.FLAG_SELECTING;
5580            }
5581            if (mSingleLine) {
5582                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5583            }
5584            outText.startOffset = 0;
5585            outText.selectionStart = getSelectionStart();
5586            outText.selectionEnd = getSelectionEnd();
5587            return true;
5588        }
5589        return false;
5590    }
5591
5592    boolean reportExtractedText() {
5593        final InputMethodState ims = mInputMethodState;
5594        if (ims != null) {
5595            final boolean contentChanged = ims.mContentChanged;
5596            if (contentChanged || ims.mSelectionModeChanged) {
5597                ims.mContentChanged = false;
5598                ims.mSelectionModeChanged = false;
5599                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5600                if (req != null) {
5601                    InputMethodManager imm = InputMethodManager.peekInstance();
5602                    if (imm != null) {
5603                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5604                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5605                                + " delta=" + ims.mChangedDelta);
5606                        if (ims.mChangedStart < 0 && !contentChanged) {
5607                            ims.mChangedStart = EXTRACT_NOTHING;
5608                        }
5609                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5610                                ims.mChangedDelta, ims.mTmpExtracted)) {
5611                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5612                                    + ims.mTmpExtracted.partialStartOffset
5613                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5614                                    + ": " + ims.mTmpExtracted.text);
5615                            imm.updateExtractedText(this, req.token,
5616                                    mInputMethodState.mTmpExtracted);
5617                            ims.mChangedStart = EXTRACT_UNKNOWN;
5618                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5619                            ims.mChangedDelta = 0;
5620                            ims.mContentChanged = false;
5621                            return true;
5622                        }
5623                    }
5624                }
5625            }
5626        }
5627        return false;
5628    }
5629
5630    /**
5631     * This is used to remove all style-impacting spans from text before new
5632     * extracted text is being replaced into it, so that we don't have any
5633     * lingering spans applied during the replace.
5634     */
5635    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5636        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5637        int i = spans.length;
5638        while (i > 0) {
5639            i--;
5640            spannable.removeSpan(spans[i]);
5641        }
5642    }
5643
5644    /**
5645     * Apply to this text view the given extracted text, as previously
5646     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5647     */
5648    public void setExtractedText(ExtractedText text) {
5649        Editable content = getEditableText();
5650        if (text.text != null) {
5651            if (content == null) {
5652                setText(text.text, TextView.BufferType.EDITABLE);
5653            } else if (text.partialStartOffset < 0) {
5654                removeParcelableSpans(content, 0, content.length());
5655                content.replace(0, content.length(), text.text);
5656            } else {
5657                final int N = content.length();
5658                int start = text.partialStartOffset;
5659                if (start > N) start = N;
5660                int end = text.partialEndOffset;
5661                if (end > N) end = N;
5662                removeParcelableSpans(content, start, end);
5663                content.replace(start, end, text.text);
5664            }
5665        }
5666
5667        // Now set the selection position...  make sure it is in range, to
5668        // avoid crashes.  If this is a partial update, it is possible that
5669        // the underlying text may have changed, causing us problems here.
5670        // Also we just don't want to trust clients to do the right thing.
5671        Spannable sp = (Spannable)getText();
5672        final int N = sp.length();
5673        int start = text.selectionStart;
5674        if (start < 0) start = 0;
5675        else if (start > N) start = N;
5676        int end = text.selectionEnd;
5677        if (end < 0) end = 0;
5678        else if (end > N) end = N;
5679        Selection.setSelection(sp, start, end);
5680
5681        // Finally, update the selection mode.
5682        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5683            MetaKeyKeyListener.startSelecting(this, sp);
5684        } else {
5685            MetaKeyKeyListener.stopSelecting(this, sp);
5686        }
5687    }
5688
5689    /**
5690     * @hide
5691     */
5692    public void setExtracting(ExtractedTextRequest req) {
5693        if (mInputMethodState != null) {
5694            mInputMethodState.mExtracting = req;
5695        }
5696        // This stops a possible text selection mode. Maybe not intended.
5697        hideControllers();
5698    }
5699
5700    /**
5701     * Called by the framework in response to a text completion from
5702     * the current input method, provided by it calling
5703     * {@link InputConnection#commitCompletion
5704     * InputConnection.commitCompletion()}.  The default implementation does
5705     * nothing; text views that are supporting auto-completion should override
5706     * this to do their desired behavior.
5707     *
5708     * @param text The auto complete text the user has selected.
5709     */
5710    public void onCommitCompletion(CompletionInfo text) {
5711        // intentionally empty
5712    }
5713
5714    /**
5715     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5716     * a dictionnary) from the current input method, provided by it calling
5717     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5718     * implementation flashes the background of the corrected word to provide feedback to the user.
5719     *
5720     * @param info The auto correct info about the text that was corrected.
5721     */
5722    public void onCommitCorrection(CorrectionInfo info) {
5723        if (mCorrectionHighlighter == null) {
5724            mCorrectionHighlighter = new CorrectionHighlighter();
5725        } else {
5726            mCorrectionHighlighter.invalidate(false);
5727        }
5728
5729        mCorrectionHighlighter.highlight(info);
5730    }
5731
5732    private class CorrectionHighlighter {
5733        private final Path mPath = new Path();
5734        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5735        private int mStart, mEnd;
5736        private long mFadingStartTime;
5737        private final static int FADE_OUT_DURATION = 400;
5738
5739        public CorrectionHighlighter() {
5740            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5741            mPaint.setStyle(Paint.Style.FILL);
5742        }
5743
5744        public void highlight(CorrectionInfo info) {
5745            mStart = info.getOffset();
5746            mEnd = mStart + info.getNewText().length();
5747            mFadingStartTime = SystemClock.uptimeMillis();
5748
5749            if (mStart < 0 || mEnd < 0) {
5750                stopAnimation();
5751            }
5752        }
5753
5754        public void draw(Canvas canvas, int cursorOffsetVertical) {
5755            if (updatePath() && updatePaint()) {
5756                if (cursorOffsetVertical != 0) {
5757                    canvas.translate(0, cursorOffsetVertical);
5758                }
5759
5760                canvas.drawPath(mPath, mPaint);
5761
5762                if (cursorOffsetVertical != 0) {
5763                    canvas.translate(0, -cursorOffsetVertical);
5764                }
5765                invalidate(true);
5766            } else {
5767                stopAnimation();
5768                invalidate(false);
5769            }
5770        }
5771
5772        private boolean updatePaint() {
5773            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5774            if (duration > FADE_OUT_DURATION) return false;
5775
5776            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5777            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5778            final int color = (mHighlightColor & 0x00FFFFFF) +
5779                    ((int) (highlightColorAlpha * coef) << 24);
5780            mPaint.setColor(color);
5781            return true;
5782        }
5783
5784        private boolean updatePath() {
5785            final Layout layout = TextView.this.mLayout;
5786            if (layout == null) return false;
5787
5788            // Update in case text is edited while the animation is run
5789            final int length = mText.length();
5790            int start = Math.min(length, mStart);
5791            int end = Math.min(length, mEnd);
5792
5793            mPath.reset();
5794            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5795            return true;
5796        }
5797
5798        private void invalidate(boolean delayed) {
5799            if (TextView.this.mLayout == null) return;
5800
5801            synchronized (sTempRect) {
5802                mPath.computeBounds(sTempRect, false);
5803
5804                int left = getCompoundPaddingLeft();
5805                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5806
5807                if (delayed) {
5808                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5809                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5810                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5811                } else {
5812                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5813                            (int) sTempRect.right, (int) sTempRect.bottom);
5814                }
5815            }
5816        }
5817
5818        private void stopAnimation() {
5819            TextView.this.mCorrectionHighlighter = null;
5820        }
5821    }
5822
5823    public void beginBatchEdit() {
5824        mInBatchEditControllers = true;
5825        final InputMethodState ims = mInputMethodState;
5826        if (ims != null) {
5827            int nesting = ++ims.mBatchEditNesting;
5828            if (nesting == 1) {
5829                ims.mCursorChanged = false;
5830                ims.mChangedDelta = 0;
5831                if (ims.mContentChanged) {
5832                    // We already have a pending change from somewhere else,
5833                    // so turn this into a full update.
5834                    ims.mChangedStart = 0;
5835                    ims.mChangedEnd = mText.length();
5836                } else {
5837                    ims.mChangedStart = EXTRACT_UNKNOWN;
5838                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5839                    ims.mContentChanged = false;
5840                }
5841                onBeginBatchEdit();
5842            }
5843        }
5844    }
5845
5846    public void endBatchEdit() {
5847        mInBatchEditControllers = false;
5848        final InputMethodState ims = mInputMethodState;
5849        if (ims != null) {
5850            int nesting = --ims.mBatchEditNesting;
5851            if (nesting == 0) {
5852                finishBatchEdit(ims);
5853            }
5854        }
5855    }
5856
5857    void ensureEndedBatchEdit() {
5858        final InputMethodState ims = mInputMethodState;
5859        if (ims != null && ims.mBatchEditNesting != 0) {
5860            ims.mBatchEditNesting = 0;
5861            finishBatchEdit(ims);
5862        }
5863    }
5864
5865    void finishBatchEdit(final InputMethodState ims) {
5866        onEndBatchEdit();
5867
5868        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5869            updateAfterEdit();
5870            reportExtractedText();
5871        } else if (ims.mCursorChanged) {
5872            // Cheezy way to get us to report the current cursor location.
5873            invalidateCursor();
5874        }
5875    }
5876
5877    void updateAfterEdit() {
5878        invalidate();
5879        int curs = getSelectionStart();
5880
5881        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5882            registerForPreDraw();
5883        }
5884
5885        if (curs >= 0) {
5886            mHighlightPathBogus = true;
5887            makeBlink();
5888            bringPointIntoView(curs);
5889        }
5890
5891        checkForResize();
5892    }
5893
5894    /**
5895     * Called by the framework in response to a request to begin a batch
5896     * of edit operations through a call to link {@link #beginBatchEdit()}.
5897     */
5898    public void onBeginBatchEdit() {
5899        // intentionally empty
5900    }
5901
5902    /**
5903     * Called by the framework in response to a request to end a batch
5904     * of edit operations through a call to link {@link #endBatchEdit}.
5905     */
5906    public void onEndBatchEdit() {
5907        // intentionally empty
5908    }
5909
5910    /**
5911     * Called by the framework in response to a private command from the
5912     * current method, provided by it calling
5913     * {@link InputConnection#performPrivateCommand
5914     * InputConnection.performPrivateCommand()}.
5915     *
5916     * @param action The action name of the command.
5917     * @param data Any additional data for the command.  This may be null.
5918     * @return Return true if you handled the command, else false.
5919     */
5920    public boolean onPrivateIMECommand(String action, Bundle data) {
5921        return false;
5922    }
5923
5924    private void nullLayouts() {
5925        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5926            mSavedLayout = (BoringLayout) mLayout;
5927        }
5928        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5929            mSavedHintLayout = (BoringLayout) mHintLayout;
5930        }
5931
5932        mLayout = mHintLayout = null;
5933
5934        // Since it depends on the value of mLayout
5935        prepareCursorControllers();
5936    }
5937
5938    /**
5939     * Make a new Layout based on the already-measured size of the view,
5940     * on the assumption that it was measured correctly at some point.
5941     */
5942    private void assumeLayout() {
5943        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5944
5945        if (width < 1) {
5946            width = 0;
5947        }
5948
5949        int physicalWidth = width;
5950
5951        if (mHorizontallyScrolling) {
5952            width = VERY_WIDE;
5953        }
5954
5955        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5956                      physicalWidth, false);
5957    }
5958
5959    @Override
5960    protected void resetResolvedLayoutDirection() {
5961        super.resetResolvedLayoutDirection();
5962
5963        if (mLayoutAlignment != null &&
5964                (mTextAlign == TextAlign.VIEW_START ||
5965                mTextAlign == TextAlign.VIEW_END)) {
5966            mLayoutAlignment = null;
5967        }
5968    }
5969
5970    private Layout.Alignment getLayoutAlignment() {
5971        if (mLayoutAlignment == null) {
5972            Layout.Alignment alignment;
5973            TextAlign textAlign = mTextAlign;
5974            switch (textAlign) {
5975                case INHERIT:
5976                    // fall through to gravity temporarily
5977                    // intention is to inherit value through view hierarchy.
5978                case GRAVITY:
5979                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
5980                        case Gravity.START:
5981                            alignment = Layout.Alignment.ALIGN_NORMAL;
5982                            break;
5983                        case Gravity.END:
5984                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
5985                            break;
5986                        case Gravity.LEFT:
5987                            alignment = Layout.Alignment.ALIGN_LEFT;
5988                            break;
5989                        case Gravity.RIGHT:
5990                            alignment = Layout.Alignment.ALIGN_RIGHT;
5991                            break;
5992                        case Gravity.CENTER_HORIZONTAL:
5993                            alignment = Layout.Alignment.ALIGN_CENTER;
5994                            break;
5995                        default:
5996                            alignment = Layout.Alignment.ALIGN_NORMAL;
5997                            break;
5998                    }
5999                    break;
6000                case TEXT_START:
6001                    alignment = Layout.Alignment.ALIGN_NORMAL;
6002                    break;
6003                case TEXT_END:
6004                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6005                    break;
6006                case CENTER:
6007                    alignment = Layout.Alignment.ALIGN_CENTER;
6008                    break;
6009                case VIEW_START:
6010                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6011                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6012                    break;
6013                case VIEW_END:
6014                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6015                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6016                    break;
6017                default:
6018                    alignment = Layout.Alignment.ALIGN_NORMAL;
6019                    break;
6020            }
6021            mLayoutAlignment = alignment;
6022        }
6023        return mLayoutAlignment;
6024    }
6025
6026    /**
6027     * The width passed in is now the desired layout width,
6028     * not the full view width with padding.
6029     * {@hide}
6030     */
6031    protected void makeNewLayout(int w, int hintWidth,
6032                                 BoringLayout.Metrics boring,
6033                                 BoringLayout.Metrics hintBoring,
6034                                 int ellipsisWidth, boolean bringIntoView) {
6035        stopMarquee();
6036
6037        mHighlightPathBogus = true;
6038
6039        if (w < 0) {
6040            w = 0;
6041        }
6042        if (hintWidth < 0) {
6043            hintWidth = 0;
6044        }
6045
6046        Layout.Alignment alignment = getLayoutAlignment();
6047        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6048
6049        if (mTextDir == null) {
6050            resolveTextDirection();
6051        }
6052        if (mText instanceof Spannable) {
6053            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
6054                    alignment, mTextDir, mSpacingMult,
6055                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
6056                    ellipsisWidth);
6057        } else {
6058            if (boring == UNKNOWN_BORING) {
6059                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6060                if (boring != null) {
6061                    mBoring = boring;
6062                }
6063            }
6064
6065            if (boring != null) {
6066                if (boring.width <= w &&
6067                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
6068                    if (mSavedLayout != null) {
6069                        mLayout = mSavedLayout.
6070                                replaceOrMake(mTransformed, mTextPaint,
6071                                w, alignment, mSpacingMult, mSpacingAdd,
6072                                boring, mIncludePad);
6073                    } else {
6074                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6075                                w, alignment, mSpacingMult, mSpacingAdd,
6076                                boring, mIncludePad);
6077                    }
6078
6079                    mSavedLayout = (BoringLayout) mLayout;
6080                } else if (shouldEllipsize && boring.width <= w) {
6081                    if (mSavedLayout != null) {
6082                        mLayout = mSavedLayout.
6083                                replaceOrMake(mTransformed, mTextPaint,
6084                                w, alignment, mSpacingMult, mSpacingAdd,
6085                                boring, mIncludePad, mEllipsize,
6086                                ellipsisWidth);
6087                    } else {
6088                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6089                                w, alignment, mSpacingMult, mSpacingAdd,
6090                                boring, mIncludePad, mEllipsize,
6091                                ellipsisWidth);
6092                    }
6093                } else if (shouldEllipsize) {
6094                    mLayout = new StaticLayout(mTransformed,
6095                                0, mTransformed.length(),
6096                                mTextPaint, w, alignment, mTextDir, mSpacingMult,
6097                                mSpacingAdd, mIncludePad, mEllipsize,
6098                                ellipsisWidth);
6099                } else {
6100                    mLayout = new StaticLayout(mTransformed, mTextPaint,
6101                            w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6102                            mIncludePad);
6103                }
6104            } else if (shouldEllipsize) {
6105                mLayout = new StaticLayout(mTransformed,
6106                            0, mTransformed.length(),
6107                            mTextPaint, w, alignment, mTextDir, mSpacingMult,
6108                            mSpacingAdd, mIncludePad, mEllipsize,
6109                            ellipsisWidth);
6110            } else {
6111                mLayout = new StaticLayout(mTransformed, mTextPaint,
6112                        w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6113                        mIncludePad);
6114            }
6115        }
6116
6117        shouldEllipsize = mEllipsize != null;
6118        mHintLayout = null;
6119
6120        if (mHint != null) {
6121            if (shouldEllipsize) hintWidth = w;
6122
6123            if (hintBoring == UNKNOWN_BORING) {
6124                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6125                                                   mHintBoring);
6126                if (hintBoring != null) {
6127                    mHintBoring = hintBoring;
6128                }
6129            }
6130
6131            if (hintBoring != null) {
6132                if (hintBoring.width <= hintWidth &&
6133                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6134                    if (mSavedHintLayout != null) {
6135                        mHintLayout = mSavedHintLayout.
6136                                replaceOrMake(mHint, mTextPaint,
6137                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6138                                hintBoring, mIncludePad);
6139                    } else {
6140                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6141                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6142                                hintBoring, mIncludePad);
6143                    }
6144
6145                    mSavedHintLayout = (BoringLayout) mHintLayout;
6146                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6147                    if (mSavedHintLayout != null) {
6148                        mHintLayout = mSavedHintLayout.
6149                                replaceOrMake(mHint, mTextPaint,
6150                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6151                                hintBoring, mIncludePad, mEllipsize,
6152                                ellipsisWidth);
6153                    } else {
6154                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6155                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6156                                hintBoring, mIncludePad, mEllipsize,
6157                                ellipsisWidth);
6158                    }
6159                } else if (shouldEllipsize) {
6160                    mHintLayout = new StaticLayout(mHint,
6161                                0, mHint.length(),
6162                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6163                                mSpacingAdd, mIncludePad, mEllipsize,
6164                                ellipsisWidth);
6165                } else {
6166                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6167                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6168                            mIncludePad);
6169                }
6170            } else if (shouldEllipsize) {
6171                mHintLayout = new StaticLayout(mHint,
6172                            0, mHint.length(),
6173                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6174                            mSpacingAdd, mIncludePad, mEllipsize,
6175                            ellipsisWidth);
6176            } else {
6177                mHintLayout = new StaticLayout(mHint, mTextPaint,
6178                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6179                        mIncludePad);
6180            }
6181        }
6182
6183        if (bringIntoView) {
6184            registerForPreDraw();
6185        }
6186
6187        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6188            if (!compressText(ellipsisWidth)) {
6189                final int height = mLayoutParams.height;
6190                // If the size of the view does not depend on the size of the text, try to
6191                // start the marquee immediately
6192                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6193                    startMarquee();
6194                } else {
6195                    // Defer the start of the marquee until we know our width (see setFrame())
6196                    mRestartMarquee = true;
6197                }
6198            }
6199        }
6200
6201        // CursorControllers need a non-null mLayout
6202        prepareCursorControllers();
6203    }
6204
6205    private boolean compressText(float width) {
6206        if (isHardwareAccelerated()) return false;
6207
6208        // Only compress the text if it hasn't been compressed by the previous pass
6209        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6210                mTextPaint.getTextScaleX() == 1.0f) {
6211            final float textWidth = mLayout.getLineWidth(0);
6212            final float overflow = (textWidth + 1.0f - width) / width;
6213            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6214                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6215                post(new Runnable() {
6216                    public void run() {
6217                        requestLayout();
6218                    }
6219                });
6220                return true;
6221            }
6222        }
6223
6224        return false;
6225    }
6226
6227    private static int desired(Layout layout) {
6228        int n = layout.getLineCount();
6229        CharSequence text = layout.getText();
6230        float max = 0;
6231
6232        // if any line was wrapped, we can't use it.
6233        // but it's ok for the last line not to have a newline
6234
6235        for (int i = 0; i < n - 1; i++) {
6236            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6237                return -1;
6238        }
6239
6240        for (int i = 0; i < n; i++) {
6241            max = Math.max(max, layout.getLineWidth(i));
6242        }
6243
6244        return (int) FloatMath.ceil(max);
6245    }
6246
6247    /**
6248     * Set whether the TextView includes extra top and bottom padding to make
6249     * room for accents that go above the normal ascent and descent.
6250     * The default is true.
6251     *
6252     * @attr ref android.R.styleable#TextView_includeFontPadding
6253     */
6254    public void setIncludeFontPadding(boolean includepad) {
6255        mIncludePad = includepad;
6256
6257        if (mLayout != null) {
6258            nullLayouts();
6259            requestLayout();
6260            invalidate();
6261        }
6262    }
6263
6264    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6265
6266    @Override
6267    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6268        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6269        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6270        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6271        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6272
6273        int width;
6274        int height;
6275
6276        BoringLayout.Metrics boring = UNKNOWN_BORING;
6277        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6278
6279        if (mTextDir == null) {
6280            resolveTextDirection();
6281        }
6282
6283        int des = -1;
6284        boolean fromexisting = false;
6285
6286        if (widthMode == MeasureSpec.EXACTLY) {
6287            // Parent has told us how big to be. So be it.
6288            width = widthSize;
6289        } else {
6290            if (mLayout != null && mEllipsize == null) {
6291                des = desired(mLayout);
6292            }
6293
6294            if (des < 0) {
6295                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6296                if (boring != null) {
6297                    mBoring = boring;
6298                }
6299            } else {
6300                fromexisting = true;
6301            }
6302
6303            if (boring == null || boring == UNKNOWN_BORING) {
6304                if (des < 0) {
6305                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6306                }
6307
6308                width = des;
6309            } else {
6310                width = boring.width;
6311            }
6312
6313            final Drawables dr = mDrawables;
6314            if (dr != null) {
6315                width = Math.max(width, dr.mDrawableWidthTop);
6316                width = Math.max(width, dr.mDrawableWidthBottom);
6317            }
6318
6319            if (mHint != null) {
6320                int hintDes = -1;
6321                int hintWidth;
6322
6323                if (mHintLayout != null && mEllipsize == null) {
6324                    hintDes = desired(mHintLayout);
6325                }
6326
6327                if (hintDes < 0) {
6328                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6329                    if (hintBoring != null) {
6330                        mHintBoring = hintBoring;
6331                    }
6332                }
6333
6334                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6335                    if (hintDes < 0) {
6336                        hintDes = (int) FloatMath.ceil(
6337                                Layout.getDesiredWidth(mHint, mTextPaint));
6338                    }
6339
6340                    hintWidth = hintDes;
6341                } else {
6342                    hintWidth = hintBoring.width;
6343                }
6344
6345                if (hintWidth > width) {
6346                    width = hintWidth;
6347                }
6348            }
6349
6350            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6351
6352            if (mMaxWidthMode == EMS) {
6353                width = Math.min(width, mMaxWidth * getLineHeight());
6354            } else {
6355                width = Math.min(width, mMaxWidth);
6356            }
6357
6358            if (mMinWidthMode == EMS) {
6359                width = Math.max(width, mMinWidth * getLineHeight());
6360            } else {
6361                width = Math.max(width, mMinWidth);
6362            }
6363
6364            // Check against our minimum width
6365            width = Math.max(width, getSuggestedMinimumWidth());
6366
6367            if (widthMode == MeasureSpec.AT_MOST) {
6368                width = Math.min(widthSize, width);
6369            }
6370        }
6371
6372        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6373        int unpaddedWidth = want;
6374
6375        if (mHorizontallyScrolling) want = VERY_WIDE;
6376
6377        int hintWant = want;
6378        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
6379
6380        if (mLayout == null) {
6381            makeNewLayout(want, hintWant, boring, hintBoring,
6382                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6383        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
6384                   (mLayout.getEllipsizedWidth() !=
6385                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6386            if (mHint == null && mEllipsize == null &&
6387                    want > mLayout.getWidth() &&
6388                    (mLayout instanceof BoringLayout ||
6389                            (fromexisting && des >= 0 && des <= want))) {
6390                mLayout.increaseWidthTo(want);
6391            } else {
6392                makeNewLayout(want, hintWant, boring, hintBoring,
6393                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6394            }
6395        } else {
6396            // Width has not changed.
6397        }
6398
6399        if (heightMode == MeasureSpec.EXACTLY) {
6400            // Parent has told us how big to be. So be it.
6401            height = heightSize;
6402            mDesiredHeightAtMeasure = -1;
6403        } else {
6404            int desired = getDesiredHeight();
6405
6406            height = desired;
6407            mDesiredHeightAtMeasure = desired;
6408
6409            if (heightMode == MeasureSpec.AT_MOST) {
6410                height = Math.min(desired, heightSize);
6411            }
6412        }
6413
6414        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6415        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6416            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6417        }
6418
6419        /*
6420         * We didn't let makeNewLayout() register to bring the cursor into view,
6421         * so do it here if there is any possibility that it is needed.
6422         */
6423        if (mMovement != null ||
6424            mLayout.getWidth() > unpaddedWidth ||
6425            mLayout.getHeight() > unpaddedHeight) {
6426            registerForPreDraw();
6427        } else {
6428            scrollTo(0, 0);
6429        }
6430
6431        setMeasuredDimension(width, height);
6432    }
6433
6434    private int getDesiredHeight() {
6435        return Math.max(
6436                getDesiredHeight(mLayout, true),
6437                getDesiredHeight(mHintLayout, mEllipsize != null));
6438    }
6439
6440    private int getDesiredHeight(Layout layout, boolean cap) {
6441        if (layout == null) {
6442            return 0;
6443        }
6444
6445        int linecount = layout.getLineCount();
6446        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6447        int desired = layout.getLineTop(linecount);
6448
6449        final Drawables dr = mDrawables;
6450        if (dr != null) {
6451            desired = Math.max(desired, dr.mDrawableHeightLeft);
6452            desired = Math.max(desired, dr.mDrawableHeightRight);
6453        }
6454
6455        desired += pad;
6456        layout.setMaximumVisibleLineCount(0);
6457
6458        if (mMaxMode == LINES) {
6459            /*
6460             * Don't cap the hint to a certain number of lines.
6461             * (Do cap it, though, if we have a maximum pixel height.)
6462             */
6463            if (cap) {
6464                if (linecount > mMaximum) {
6465                    layout.setMaximumVisibleLineCount(mMaximum);
6466                    desired = layout.getLineTop(mMaximum);
6467
6468                    if (dr != null) {
6469                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6470                        desired = Math.max(desired, dr.mDrawableHeightRight);
6471                    }
6472
6473                    desired += pad;
6474                    linecount = mMaximum;
6475                }
6476            }
6477        } else {
6478            desired = Math.min(desired, mMaximum);
6479        }
6480
6481        if (mMinMode == LINES) {
6482            if (linecount < mMinimum) {
6483                desired += getLineHeight() * (mMinimum - linecount);
6484            }
6485        } else {
6486            desired = Math.max(desired, mMinimum);
6487        }
6488
6489        // Check against our minimum height
6490        desired = Math.max(desired, getSuggestedMinimumHeight());
6491
6492        return desired;
6493    }
6494
6495    /**
6496     * Check whether a change to the existing text layout requires a
6497     * new view layout.
6498     */
6499    private void checkForResize() {
6500        boolean sizeChanged = false;
6501
6502        if (mLayout != null) {
6503            // Check if our width changed
6504            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6505                sizeChanged = true;
6506                invalidate();
6507            }
6508
6509            // Check if our height changed
6510            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6511                int desiredHeight = getDesiredHeight();
6512
6513                if (desiredHeight != this.getHeight()) {
6514                    sizeChanged = true;
6515                }
6516            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6517                if (mDesiredHeightAtMeasure >= 0) {
6518                    int desiredHeight = getDesiredHeight();
6519
6520                    if (desiredHeight != mDesiredHeightAtMeasure) {
6521                        sizeChanged = true;
6522                    }
6523                }
6524            }
6525        }
6526
6527        if (sizeChanged) {
6528            requestLayout();
6529            // caller will have already invalidated
6530        }
6531    }
6532
6533    /**
6534     * Check whether entirely new text requires a new view layout
6535     * or merely a new text layout.
6536     */
6537    private void checkForRelayout() {
6538        // If we have a fixed width, we can just swap in a new text layout
6539        // if the text height stays the same or if the view height is fixed.
6540
6541        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6542                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6543                (mHint == null || mHintLayout != null) &&
6544                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6545            // Static width, so try making a new text layout.
6546
6547            int oldht = mLayout.getHeight();
6548            int want = mLayout.getWidth();
6549            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6550
6551            /*
6552             * No need to bring the text into view, since the size is not
6553             * changing (unless we do the requestLayout(), in which case it
6554             * will happen at measure).
6555             */
6556            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6557                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6558                          false);
6559
6560            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6561                // In a fixed-height view, so use our new text layout.
6562                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6563                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6564                    invalidate();
6565                    return;
6566                }
6567
6568                // Dynamic height, but height has stayed the same,
6569                // so use our new text layout.
6570                if (mLayout.getHeight() == oldht &&
6571                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6572                    invalidate();
6573                    return;
6574                }
6575            }
6576
6577            // We lose: the height has changed and we have a dynamic height.
6578            // Request a new view layout using our new text layout.
6579            requestLayout();
6580            invalidate();
6581        } else {
6582            // Dynamic width, so we have no choice but to request a new
6583            // view layout with a new text layout.
6584
6585            nullLayouts();
6586            requestLayout();
6587            invalidate();
6588        }
6589    }
6590
6591    /**
6592     * Returns true if anything changed.
6593     */
6594    private boolean bringTextIntoView() {
6595        int line = 0;
6596        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6597            line = mLayout.getLineCount() - 1;
6598        }
6599
6600        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6601        int dir = mLayout.getParagraphDirection(line);
6602        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6603        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6604        int ht = mLayout.getHeight();
6605
6606        int scrollx, scrolly;
6607
6608        // Convert to left, center, or right alignment.
6609        if (a == Layout.Alignment.ALIGN_NORMAL) {
6610            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6611                Layout.Alignment.ALIGN_RIGHT;
6612        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6613            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6614                Layout.Alignment.ALIGN_LEFT;
6615        }
6616
6617        if (a == Layout.Alignment.ALIGN_CENTER) {
6618            /*
6619             * Keep centered if possible, or, if it is too wide to fit,
6620             * keep leading edge in view.
6621             */
6622
6623            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6624            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6625
6626            if (right - left < hspace) {
6627                scrollx = (right + left) / 2 - hspace / 2;
6628            } else {
6629                if (dir < 0) {
6630                    scrollx = right - hspace;
6631                } else {
6632                    scrollx = left;
6633                }
6634            }
6635        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6636            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6637            scrollx = right - hspace;
6638        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6639            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6640        }
6641
6642        if (ht < vspace) {
6643            scrolly = 0;
6644        } else {
6645            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6646                scrolly = ht - vspace;
6647            } else {
6648                scrolly = 0;
6649            }
6650        }
6651
6652        if (scrollx != mScrollX || scrolly != mScrollY) {
6653            scrollTo(scrollx, scrolly);
6654            return true;
6655        } else {
6656            return false;
6657        }
6658    }
6659
6660    /**
6661     * Move the point, specified by the offset, into the view if it is needed.
6662     * This has to be called after layout. Returns true if anything changed.
6663     */
6664    public boolean bringPointIntoView(int offset) {
6665        boolean changed = false;
6666
6667        if (mLayout == null) return changed;
6668
6669        int line = mLayout.getLineForOffset(offset);
6670
6671        // FIXME: Is it okay to truncate this, or should we round?
6672        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6673        final int top = mLayout.getLineTop(line);
6674        final int bottom = mLayout.getLineTop(line + 1);
6675
6676        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6677        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6678        int ht = mLayout.getHeight();
6679
6680        int grav;
6681
6682        switch (mLayout.getParagraphAlignment(line)) {
6683            case ALIGN_LEFT:
6684                grav = 1;
6685                break;
6686            case ALIGN_RIGHT:
6687                grav = -1;
6688                break;
6689            case ALIGN_NORMAL:
6690                grav = mLayout.getParagraphDirection(line);
6691                break;
6692            case ALIGN_OPPOSITE:
6693                grav = -mLayout.getParagraphDirection(line);
6694                break;
6695            case ALIGN_CENTER:
6696            default:
6697                grav = 0;
6698                break;
6699        }
6700
6701        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6702        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6703
6704        int hslack = (bottom - top) / 2;
6705        int vslack = hslack;
6706
6707        if (vslack > vspace / 4)
6708            vslack = vspace / 4;
6709        if (hslack > hspace / 4)
6710            hslack = hspace / 4;
6711
6712        int hs = mScrollX;
6713        int vs = mScrollY;
6714
6715        if (top - vs < vslack)
6716            vs = top - vslack;
6717        if (bottom - vs > vspace - vslack)
6718            vs = bottom - (vspace - vslack);
6719        if (ht - vs < vspace)
6720            vs = ht - vspace;
6721        if (0 - vs > 0)
6722            vs = 0;
6723
6724        if (grav != 0) {
6725            if (x - hs < hslack) {
6726                hs = x - hslack;
6727            }
6728            if (x - hs > hspace - hslack) {
6729                hs = x - (hspace - hslack);
6730            }
6731        }
6732
6733        if (grav < 0) {
6734            if (left - hs > 0)
6735                hs = left;
6736            if (right - hs < hspace)
6737                hs = right - hspace;
6738        } else if (grav > 0) {
6739            if (right - hs < hspace)
6740                hs = right - hspace;
6741            if (left - hs > 0)
6742                hs = left;
6743        } else /* grav == 0 */ {
6744            if (right - left <= hspace) {
6745                /*
6746                 * If the entire text fits, center it exactly.
6747                 */
6748                hs = left - (hspace - (right - left)) / 2;
6749            } else if (x > right - hslack) {
6750                /*
6751                 * If we are near the right edge, keep the right edge
6752                 * at the edge of the view.
6753                 */
6754                hs = right - hspace;
6755            } else if (x < left + hslack) {
6756                /*
6757                 * If we are near the left edge, keep the left edge
6758                 * at the edge of the view.
6759                 */
6760                hs = left;
6761            } else if (left > hs) {
6762                /*
6763                 * Is there whitespace visible at the left?  Fix it if so.
6764                 */
6765                hs = left;
6766            } else if (right < hs + hspace) {
6767                /*
6768                 * Is there whitespace visible at the right?  Fix it if so.
6769                 */
6770                hs = right - hspace;
6771            } else {
6772                /*
6773                 * Otherwise, float as needed.
6774                 */
6775                if (x - hs < hslack) {
6776                    hs = x - hslack;
6777                }
6778                if (x - hs > hspace - hslack) {
6779                    hs = x - (hspace - hslack);
6780                }
6781            }
6782        }
6783
6784        if (hs != mScrollX || vs != mScrollY) {
6785            if (mScroller == null) {
6786                scrollTo(hs, vs);
6787            } else {
6788                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6789                int dx = hs - mScrollX;
6790                int dy = vs - mScrollY;
6791
6792                if (duration > ANIMATED_SCROLL_GAP) {
6793                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6794                    awakenScrollBars(mScroller.getDuration());
6795                    invalidate();
6796                } else {
6797                    if (!mScroller.isFinished()) {
6798                        mScroller.abortAnimation();
6799                    }
6800
6801                    scrollBy(dx, dy);
6802                }
6803
6804                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6805            }
6806
6807            changed = true;
6808        }
6809
6810        if (isFocused()) {
6811            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6812            // requestRectangleOnScreen() is in terms of content coordinates.
6813
6814            if (mTempRect == null) mTempRect = new Rect();
6815            mTempRect.set(x, top, x + 1, bottom);
6816            getInterestingRect(mTempRect, line);
6817            mTempRect.offset(mScrollX, mScrollY);
6818
6819            if (requestRectangleOnScreen(mTempRect)) {
6820                changed = true;
6821            }
6822        }
6823
6824        return changed;
6825    }
6826
6827    /**
6828     * Move the cursor, if needed, so that it is at an offset that is visible
6829     * to the user.  This will not move the cursor if it represents more than
6830     * one character (a selection range).  This will only work if the
6831     * TextView contains spannable text; otherwise it will do nothing.
6832     *
6833     * @return True if the cursor was actually moved, false otherwise.
6834     */
6835    public boolean moveCursorToVisibleOffset() {
6836        if (!(mText instanceof Spannable)) {
6837            return false;
6838        }
6839        int start = getSelectionStart();
6840        int end = getSelectionEnd();
6841        if (start != end) {
6842            return false;
6843        }
6844
6845        // First: make sure the line is visible on screen:
6846
6847        int line = mLayout.getLineForOffset(start);
6848
6849        final int top = mLayout.getLineTop(line);
6850        final int bottom = mLayout.getLineTop(line + 1);
6851        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6852        int vslack = (bottom - top) / 2;
6853        if (vslack > vspace / 4)
6854            vslack = vspace / 4;
6855        final int vs = mScrollY;
6856
6857        if (top < (vs+vslack)) {
6858            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6859        } else if (bottom > (vspace+vs-vslack)) {
6860            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6861        }
6862
6863        // Next: make sure the character is visible on screen:
6864
6865        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6866        final int hs = mScrollX;
6867        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6868        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6869
6870        // line might contain bidirectional text
6871        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6872        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6873
6874        int newStart = start;
6875        if (newStart < lowChar) {
6876            newStart = lowChar;
6877        } else if (newStart > highChar) {
6878            newStart = highChar;
6879        }
6880
6881        if (newStart != start) {
6882            Selection.setSelection((Spannable)mText, newStart);
6883            return true;
6884        }
6885
6886        return false;
6887    }
6888
6889    @Override
6890    public void computeScroll() {
6891        if (mScroller != null) {
6892            if (mScroller.computeScrollOffset()) {
6893                mScrollX = mScroller.getCurrX();
6894                mScrollY = mScroller.getCurrY();
6895                invalidateParentCaches();
6896                postInvalidate();  // So we draw again
6897            }
6898        }
6899    }
6900
6901    private void getInterestingRect(Rect r, int line) {
6902        convertFromViewportToContentCoordinates(r);
6903
6904        // Rectangle can can be expanded on first and last line to take
6905        // padding into account.
6906        // TODO Take left/right padding into account too?
6907        if (line == 0) r.top -= getExtendedPaddingTop();
6908        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6909    }
6910
6911    private void convertFromViewportToContentCoordinates(Rect r) {
6912        final int horizontalOffset = viewportToContentHorizontalOffset();
6913        r.left += horizontalOffset;
6914        r.right += horizontalOffset;
6915
6916        final int verticalOffset = viewportToContentVerticalOffset();
6917        r.top += verticalOffset;
6918        r.bottom += verticalOffset;
6919    }
6920
6921    private int viewportToContentHorizontalOffset() {
6922        return getCompoundPaddingLeft() - mScrollX;
6923    }
6924
6925    private int viewportToContentVerticalOffset() {
6926        int offset = getExtendedPaddingTop() - mScrollY;
6927        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6928            offset += getVerticalOffset(false);
6929        }
6930        return offset;
6931    }
6932
6933    @Override
6934    public void debug(int depth) {
6935        super.debug(depth);
6936
6937        String output = debugIndent(depth);
6938        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6939                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6940                + "} ";
6941
6942        if (mText != null) {
6943
6944            output += "mText=\"" + mText + "\" ";
6945            if (mLayout != null) {
6946                output += "mLayout width=" + mLayout.getWidth()
6947                        + " height=" + mLayout.getHeight();
6948            }
6949        } else {
6950            output += "mText=NULL";
6951        }
6952        Log.d(VIEW_LOG_TAG, output);
6953    }
6954
6955    /**
6956     * Convenience for {@link Selection#getSelectionStart}.
6957     */
6958    @ViewDebug.ExportedProperty(category = "text")
6959    public int getSelectionStart() {
6960        return Selection.getSelectionStart(getText());
6961    }
6962
6963    /**
6964     * Convenience for {@link Selection#getSelectionEnd}.
6965     */
6966    @ViewDebug.ExportedProperty(category = "text")
6967    public int getSelectionEnd() {
6968        return Selection.getSelectionEnd(getText());
6969    }
6970
6971    /**
6972     * Return true iff there is a selection inside this text view.
6973     */
6974    public boolean hasSelection() {
6975        final int selectionStart = getSelectionStart();
6976        final int selectionEnd = getSelectionEnd();
6977
6978        return selectionStart >= 0 && selectionStart != selectionEnd;
6979    }
6980
6981    /**
6982     * Sets the properties of this field (lines, horizontally scrolling,
6983     * transformation method) to be for a single-line input.
6984     *
6985     * @attr ref android.R.styleable#TextView_singleLine
6986     */
6987    public void setSingleLine() {
6988        setSingleLine(true);
6989    }
6990
6991    /**
6992     * Sets the properties of this field to transform input to ALL CAPS
6993     * display. This may use a "small caps" formatting if available.
6994     * This setting will be ignored if this field is editable or selectable.
6995     *
6996     * This call replaces the current transformation method. Disabling this
6997     * will not necessarily restore the previous behavior from before this
6998     * was enabled.
6999     *
7000     * @see #setTransformationMethod(TransformationMethod)
7001     * @attr ref android.R.styleable#TextView_textAllCaps
7002     */
7003    public void setAllCaps(boolean allCaps) {
7004        if (allCaps) {
7005            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7006        } else {
7007            setTransformationMethod(null);
7008        }
7009    }
7010
7011    /**
7012     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7013     * transformation method) to be for a single-line input; if false, restores these to the default
7014     * conditions.
7015     *
7016     * Note that the default conditions are not necessarily those that were in effect prior this
7017     * method, and you may want to reset these properties to your custom values.
7018     *
7019     * @attr ref android.R.styleable#TextView_singleLine
7020     */
7021    @android.view.RemotableViewMethod
7022    public void setSingleLine(boolean singleLine) {
7023        // Could be used, but may break backward compatibility.
7024        // if (mSingleLine == singleLine) return;
7025        setInputTypeSingleLine(singleLine);
7026        applySingleLine(singleLine, true, true);
7027    }
7028
7029    /**
7030     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7031     * @param singleLine
7032     */
7033    private void setInputTypeSingleLine(boolean singleLine) {
7034        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7035            if (singleLine) {
7036                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7037            } else {
7038                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7039            }
7040        }
7041    }
7042
7043    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7044            boolean changeMaxLines) {
7045        mSingleLine = singleLine;
7046        if (singleLine) {
7047            setLines(1);
7048            setHorizontallyScrolling(true);
7049            if (applyTransformation) {
7050                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7051            }
7052        } else {
7053            if (changeMaxLines) {
7054                setMaxLines(Integer.MAX_VALUE);
7055            }
7056            setHorizontallyScrolling(false);
7057            if (applyTransformation) {
7058                setTransformationMethod(null);
7059            }
7060        }
7061    }
7062
7063    /**
7064     * Causes words in the text that are longer than the view is wide
7065     * to be ellipsized instead of broken in the middle.  You may also
7066     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7067     * to constrain the text to a single line.  Use <code>null</code>
7068     * to turn off ellipsizing.
7069     *
7070     * @attr ref android.R.styleable#TextView_ellipsize
7071     */
7072    public void setEllipsize(TextUtils.TruncateAt where) {
7073        mEllipsize = where;
7074
7075        if (mLayout != null) {
7076            nullLayouts();
7077            requestLayout();
7078            invalidate();
7079        }
7080    }
7081
7082    /**
7083     * Sets how many times to repeat the marquee animation. Only applied if the
7084     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7085     *
7086     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7087     */
7088    public void setMarqueeRepeatLimit(int marqueeLimit) {
7089        mMarqueeRepeatLimit = marqueeLimit;
7090    }
7091
7092    /**
7093     * Returns where, if anywhere, words that are longer than the view
7094     * is wide should be ellipsized.
7095     */
7096    @ViewDebug.ExportedProperty
7097    public TextUtils.TruncateAt getEllipsize() {
7098        return mEllipsize;
7099    }
7100
7101    /**
7102     * Set the TextView so that when it takes focus, all the text is
7103     * selected.
7104     *
7105     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7106     */
7107    @android.view.RemotableViewMethod
7108    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7109        mSelectAllOnFocus = selectAllOnFocus;
7110
7111        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7112            setText(mText, BufferType.SPANNABLE);
7113        }
7114    }
7115
7116    /**
7117     * Set whether the cursor is visible.  The default is true.
7118     *
7119     * @attr ref android.R.styleable#TextView_cursorVisible
7120     */
7121    @android.view.RemotableViewMethod
7122    public void setCursorVisible(boolean visible) {
7123        if (mCursorVisible != visible) {
7124            mCursorVisible = visible;
7125            invalidate();
7126
7127            makeBlink();
7128
7129            // InsertionPointCursorController depends on mCursorVisible
7130            prepareCursorControllers();
7131        }
7132    }
7133
7134    private boolean isCursorVisible() {
7135        return mCursorVisible && isTextEditable();
7136    }
7137
7138    private boolean canMarquee() {
7139        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7140        return width > 0 && mLayout.getLineWidth(0) > width;
7141    }
7142
7143    private void startMarquee() {
7144        // Do not ellipsize EditText
7145        if (mInput != null) return;
7146
7147        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7148            return;
7149        }
7150
7151        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7152                getLineCount() == 1 && canMarquee()) {
7153
7154            if (mMarquee == null) mMarquee = new Marquee(this);
7155            mMarquee.start(mMarqueeRepeatLimit);
7156        }
7157    }
7158
7159    private void stopMarquee() {
7160        if (mMarquee != null && !mMarquee.isStopped()) {
7161            mMarquee.stop();
7162        }
7163    }
7164
7165    private void startStopMarquee(boolean start) {
7166        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7167            if (start) {
7168                startMarquee();
7169            } else {
7170                stopMarquee();
7171            }
7172        }
7173    }
7174
7175    private static final class Marquee extends Handler {
7176        // TODO: Add an option to configure this
7177        private static final float MARQUEE_DELTA_MAX = 0.07f;
7178        private static final int MARQUEE_DELAY = 1200;
7179        private static final int MARQUEE_RESTART_DELAY = 1200;
7180        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7181        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7182
7183        private static final byte MARQUEE_STOPPED = 0x0;
7184        private static final byte MARQUEE_STARTING = 0x1;
7185        private static final byte MARQUEE_RUNNING = 0x2;
7186
7187        private static final int MESSAGE_START = 0x1;
7188        private static final int MESSAGE_TICK = 0x2;
7189        private static final int MESSAGE_RESTART = 0x3;
7190
7191        private final WeakReference<TextView> mView;
7192
7193        private byte mStatus = MARQUEE_STOPPED;
7194        private final float mScrollUnit;
7195        private float mMaxScroll;
7196        float mMaxFadeScroll;
7197        private float mGhostStart;
7198        private float mGhostOffset;
7199        private float mFadeStop;
7200        private int mRepeatLimit;
7201
7202        float mScroll;
7203
7204        Marquee(TextView v) {
7205            final float density = v.getContext().getResources().getDisplayMetrics().density;
7206            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7207            mView = new WeakReference<TextView>(v);
7208        }
7209
7210        @Override
7211        public void handleMessage(Message msg) {
7212            switch (msg.what) {
7213                case MESSAGE_START:
7214                    mStatus = MARQUEE_RUNNING;
7215                    tick();
7216                    break;
7217                case MESSAGE_TICK:
7218                    tick();
7219                    break;
7220                case MESSAGE_RESTART:
7221                    if (mStatus == MARQUEE_RUNNING) {
7222                        if (mRepeatLimit >= 0) {
7223                            mRepeatLimit--;
7224                        }
7225                        start(mRepeatLimit);
7226                    }
7227                    break;
7228            }
7229        }
7230
7231        void tick() {
7232            if (mStatus != MARQUEE_RUNNING) {
7233                return;
7234            }
7235
7236            removeMessages(MESSAGE_TICK);
7237
7238            final TextView textView = mView.get();
7239            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7240                mScroll += mScrollUnit;
7241                if (mScroll > mMaxScroll) {
7242                    mScroll = mMaxScroll;
7243                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7244                } else {
7245                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7246                }
7247                textView.invalidate();
7248            }
7249        }
7250
7251        void stop() {
7252            mStatus = MARQUEE_STOPPED;
7253            removeMessages(MESSAGE_START);
7254            removeMessages(MESSAGE_RESTART);
7255            removeMessages(MESSAGE_TICK);
7256            resetScroll();
7257        }
7258
7259        private void resetScroll() {
7260            mScroll = 0.0f;
7261            final TextView textView = mView.get();
7262            if (textView != null) textView.invalidate();
7263        }
7264
7265        void start(int repeatLimit) {
7266            if (repeatLimit == 0) {
7267                stop();
7268                return;
7269            }
7270            mRepeatLimit = repeatLimit;
7271            final TextView textView = mView.get();
7272            if (textView != null && textView.mLayout != null) {
7273                mStatus = MARQUEE_STARTING;
7274                mScroll = 0.0f;
7275                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7276                        textView.getCompoundPaddingRight();
7277                final float lineWidth = textView.mLayout.getLineWidth(0);
7278                final float gap = textWidth / 3.0f;
7279                mGhostStart = lineWidth - textWidth + gap;
7280                mMaxScroll = mGhostStart + textWidth;
7281                mGhostOffset = lineWidth + gap;
7282                mFadeStop = lineWidth + textWidth / 6.0f;
7283                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7284
7285                textView.invalidate();
7286                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7287            }
7288        }
7289
7290        float getGhostOffset() {
7291            return mGhostOffset;
7292        }
7293
7294        boolean shouldDrawLeftFade() {
7295            return mScroll <= mFadeStop;
7296        }
7297
7298        boolean shouldDrawGhost() {
7299            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7300        }
7301
7302        boolean isRunning() {
7303            return mStatus == MARQUEE_RUNNING;
7304        }
7305
7306        boolean isStopped() {
7307            return mStatus == MARQUEE_STOPPED;
7308        }
7309    }
7310
7311    /**
7312     * This method is called when the text is changed, in case any subclasses
7313     * would like to know.
7314     *
7315     * Within <code>text</code>, the <code>lengthAfter</code> characters
7316     * beginning at <code>start</code> have just replaced old text that had
7317     * length <code>lengthBefore</code>. It is an error to attempt to make
7318     * changes to <code>text</code> from this callback.
7319     *
7320     * @param text The text the TextView is displaying
7321     * @param start The offset of the start of the range of the text that was
7322     * modified
7323     * @param lengthBefore The length of the former text that has been replaced
7324     * @param lengthAfter The length of the replacement modified text
7325     */
7326    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7327        // intentionally empty
7328    }
7329
7330    /**
7331     * This method is called when the selection has changed, in case any
7332     * subclasses would like to know.
7333     *
7334     * @param selStart The new selection start location.
7335     * @param selEnd The new selection end location.
7336     */
7337    protected void onSelectionChanged(int selStart, int selEnd) {
7338        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7339    }
7340
7341    /**
7342     * Adds a TextWatcher to the list of those whose methods are called
7343     * whenever this TextView's text changes.
7344     * <p>
7345     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7346     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7347     * if there are any text changed listeners forces the buffer type to
7348     * Editable if it would not otherwise be and does call this method.
7349     */
7350    public void addTextChangedListener(TextWatcher watcher) {
7351        if (mListeners == null) {
7352            mListeners = new ArrayList<TextWatcher>();
7353        }
7354
7355        mListeners.add(watcher);
7356    }
7357
7358    /**
7359     * Removes the specified TextWatcher from the list of those whose
7360     * methods are called
7361     * whenever this TextView's text changes.
7362     */
7363    public void removeTextChangedListener(TextWatcher watcher) {
7364        if (mListeners != null) {
7365            int i = mListeners.indexOf(watcher);
7366
7367            if (i >= 0) {
7368                mListeners.remove(i);
7369            }
7370        }
7371    }
7372
7373    private void sendBeforeTextChanged(CharSequence text, int start, int before,
7374                                   int after) {
7375        if (mListeners != null) {
7376            final ArrayList<TextWatcher> list = mListeners;
7377            final int count = list.size();
7378            for (int i = 0; i < count; i++) {
7379                list.get(i).beforeTextChanged(text, start, before, after);
7380            }
7381        }
7382    }
7383
7384    /**
7385     * Not private so it can be called from an inner class without going
7386     * through a thunk.
7387     */
7388    void sendOnTextChanged(CharSequence text, int start, int before,
7389                                   int after) {
7390        if (mListeners != null) {
7391            final ArrayList<TextWatcher> list = mListeners;
7392            final int count = list.size();
7393            for (int i = 0; i < count; i++) {
7394                list.get(i).onTextChanged(text, start, before, after);
7395            }
7396        }
7397    }
7398
7399    /**
7400     * Not private so it can be called from an inner class without going
7401     * through a thunk.
7402     */
7403    void sendAfterTextChanged(Editable text) {
7404        if (mListeners != null) {
7405            final ArrayList<TextWatcher> list = mListeners;
7406            final int count = list.size();
7407            for (int i = 0; i < count; i++) {
7408                list.get(i).afterTextChanged(text);
7409            }
7410        }
7411    }
7412
7413    /**
7414     * Not private so it can be called from an inner class without going
7415     * through a thunk.
7416     */
7417    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7418        final InputMethodState ims = mInputMethodState;
7419        if (ims == null || ims.mBatchEditNesting == 0) {
7420            updateAfterEdit();
7421        }
7422        if (ims != null) {
7423            ims.mContentChanged = true;
7424            if (ims.mChangedStart < 0) {
7425                ims.mChangedStart = start;
7426                ims.mChangedEnd = start+before;
7427            } else {
7428                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7429                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7430            }
7431            ims.mChangedDelta += after-before;
7432        }
7433
7434        sendOnTextChanged(buffer, start, before, after);
7435        onTextChanged(buffer, start, before, after);
7436
7437        // Hide the controllers if the amount of content changed
7438        if (before != after) {
7439            hideControllers();
7440        }
7441    }
7442
7443    /**
7444     * Not private so it can be called from an inner class without going
7445     * through a thunk.
7446     */
7447    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7448        // XXX Make the start and end move together if this ends up
7449        // spending too much time invalidating.
7450
7451        boolean selChanged = false;
7452        int newSelStart=-1, newSelEnd=-1;
7453
7454        final InputMethodState ims = mInputMethodState;
7455
7456        if (what == Selection.SELECTION_END) {
7457            mHighlightPathBogus = true;
7458            selChanged = true;
7459            newSelEnd = newStart;
7460
7461            if (!isFocused()) {
7462                mSelectionMoved = true;
7463            }
7464
7465            if (oldStart >= 0 || newStart >= 0) {
7466                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7467                registerForPreDraw();
7468                makeBlink();
7469            }
7470        }
7471
7472        if (what == Selection.SELECTION_START) {
7473            mHighlightPathBogus = true;
7474            selChanged = true;
7475            newSelStart = newStart;
7476
7477            if (!isFocused()) {
7478                mSelectionMoved = true;
7479            }
7480
7481            if (oldStart >= 0 || newStart >= 0) {
7482                int end = Selection.getSelectionEnd(buf);
7483                invalidateCursor(end, oldStart, newStart);
7484            }
7485        }
7486
7487        if (selChanged) {
7488            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7489                if (newSelStart < 0) {
7490                    newSelStart = Selection.getSelectionStart(buf);
7491                }
7492                if (newSelEnd < 0) {
7493                    newSelEnd = Selection.getSelectionEnd(buf);
7494                }
7495                onSelectionChanged(newSelStart, newSelEnd);
7496            }
7497        }
7498
7499        if (what instanceof UpdateAppearance ||
7500            what instanceof ParagraphStyle) {
7501            if (ims == null || ims.mBatchEditNesting == 0) {
7502                invalidate();
7503                mHighlightPathBogus = true;
7504                checkForResize();
7505            } else {
7506                ims.mContentChanged = true;
7507            }
7508        }
7509
7510        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7511            mHighlightPathBogus = true;
7512            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7513                ims.mSelectionModeChanged = true;
7514            }
7515
7516            if (Selection.getSelectionStart(buf) >= 0) {
7517                if (ims == null || ims.mBatchEditNesting == 0) {
7518                    invalidateCursor();
7519                } else {
7520                    ims.mCursorChanged = true;
7521                }
7522            }
7523        }
7524
7525        if (what instanceof ParcelableSpan) {
7526            // If this is a span that can be sent to a remote process,
7527            // the current extract editor would be interested in it.
7528            if (ims != null && ims.mExtracting != null) {
7529                if (ims.mBatchEditNesting != 0) {
7530                    if (oldStart >= 0) {
7531                        if (ims.mChangedStart > oldStart) {
7532                            ims.mChangedStart = oldStart;
7533                        }
7534                        if (ims.mChangedStart > oldEnd) {
7535                            ims.mChangedStart = oldEnd;
7536                        }
7537                    }
7538                    if (newStart >= 0) {
7539                        if (ims.mChangedStart > newStart) {
7540                            ims.mChangedStart = newStart;
7541                        }
7542                        if (ims.mChangedStart > newEnd) {
7543                            ims.mChangedStart = newEnd;
7544                        }
7545                    }
7546                } else {
7547                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7548                            + oldStart + "-" + oldEnd + ","
7549                            + newStart + "-" + newEnd + what);
7550                    ims.mContentChanged = true;
7551                }
7552            }
7553        }
7554    }
7555
7556    private class ChangeWatcher
7557    implements TextWatcher, SpanWatcher {
7558
7559        private CharSequence mBeforeText;
7560
7561        public void beforeTextChanged(CharSequence buffer, int start,
7562                                      int before, int after) {
7563            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7564                    + " before=" + before + " after=" + after + ": " + buffer);
7565
7566            if (AccessibilityManager.getInstance(mContext).isEnabled()
7567                    && !isPasswordInputType(mInputType)
7568                    && !hasPasswordTransformationMethod()) {
7569                mBeforeText = buffer.toString();
7570            }
7571
7572            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7573        }
7574
7575        public void onTextChanged(CharSequence buffer, int start,
7576                                  int before, int after) {
7577            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7578                    + " before=" + before + " after=" + after + ": " + buffer);
7579            TextView.this.handleTextChanged(buffer, start, before, after);
7580
7581            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7582                    (isFocused() || isSelected() &&
7583                    isShown())) {
7584                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7585                mBeforeText = null;
7586            }
7587        }
7588
7589        public void afterTextChanged(Editable buffer) {
7590            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7591            TextView.this.sendAfterTextChanged(buffer);
7592
7593            if (MetaKeyKeyListener.getMetaState(buffer,
7594                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7595                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7596            }
7597        }
7598
7599        public void onSpanChanged(Spannable buf,
7600                                  Object what, int s, int e, int st, int en) {
7601            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7602                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7603            TextView.this.spanChange(buf, what, s, st, e, en);
7604        }
7605
7606        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7607            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7608                    + " what=" + what + ": " + buf);
7609            TextView.this.spanChange(buf, what, -1, s, -1, e);
7610        }
7611
7612        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7613            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7614                    + " what=" + what + ": " + buf);
7615            TextView.this.spanChange(buf, what, s, -1, e, -1);
7616        }
7617    }
7618
7619    /**
7620     * @hide
7621     */
7622    @Override
7623    public void dispatchFinishTemporaryDetach() {
7624        mDispatchTemporaryDetach = true;
7625        super.dispatchFinishTemporaryDetach();
7626        mDispatchTemporaryDetach = false;
7627    }
7628
7629    @Override
7630    public void onStartTemporaryDetach() {
7631        super.onStartTemporaryDetach();
7632        // Only track when onStartTemporaryDetach() is called directly,
7633        // usually because this instance is an editable field in a list
7634        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7635
7636        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7637        // selection becomes visible again. Until a better solution is found, stop text selection
7638        // mode (if any) as soon as this TextView is recycled.
7639        hideControllers();
7640    }
7641
7642    @Override
7643    public void onFinishTemporaryDetach() {
7644        super.onFinishTemporaryDetach();
7645        // Only track when onStartTemporaryDetach() is called directly,
7646        // usually because this instance is an editable field in a list
7647        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7648    }
7649
7650    @Override
7651    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7652        if (mTemporaryDetach) {
7653            // If we are temporarily in the detach state, then do nothing.
7654            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7655            return;
7656        }
7657
7658        mShowCursor = SystemClock.uptimeMillis();
7659
7660        ensureEndedBatchEdit();
7661
7662        if (focused) {
7663            int selStart = getSelectionStart();
7664            int selEnd = getSelectionEnd();
7665
7666            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7667            // mode for these, unless there was a specific selection already started.
7668            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7669                    selEnd == mText.length();
7670            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7671
7672            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7673                // If a tap was used to give focus to that view, move cursor at tap position.
7674                // Has to be done before onTakeFocus, which can be overloaded.
7675                final int lastTapPosition = getLastTapPosition();
7676                if (lastTapPosition >= 0) {
7677                    Selection.setSelection((Spannable) mText, lastTapPosition);
7678                }
7679
7680                if (mMovement != null) {
7681                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7682                }
7683
7684                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7685                // pressed. Since it is the ViewAncestor's mView, it requests focus before
7686                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7687                // This special case ensure that we keep current selection in that case.
7688                // It would be better to know why the DecorView does not have focus at that time.
7689                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7690                        selStart >= 0 && selEnd >= 0) {
7691                    /*
7692                     * Someone intentionally set the selection, so let them
7693                     * do whatever it is that they wanted to do instead of
7694                     * the default on-focus behavior.  We reset the selection
7695                     * here instead of just skipping the onTakeFocus() call
7696                     * because some movement methods do something other than
7697                     * just setting the selection in theirs and we still
7698                     * need to go through that path.
7699                     */
7700                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7701                }
7702
7703                if (mSelectAllOnFocus) {
7704                    selectAll();
7705                }
7706
7707                mTouchFocusSelected = true;
7708            }
7709
7710            mFrozenWithFocus = false;
7711            mSelectionMoved = false;
7712
7713            if (mText instanceof Spannable) {
7714                Spannable sp = (Spannable) mText;
7715                MetaKeyKeyListener.resetMetaState(sp);
7716            }
7717
7718            makeBlink();
7719
7720            if (mError != null) {
7721                showError();
7722            }
7723        } else {
7724            if (mError != null) {
7725                hideError();
7726            }
7727            // Don't leave us in the middle of a batch edit.
7728            onEndBatchEdit();
7729
7730            if (this instanceof ExtractEditText) {
7731                // terminateTextSelectionMode removes selection, which we want to keep when
7732                // ExtractEditText goes out of focus.
7733                final int selStart = getSelectionStart();
7734                final int selEnd = getSelectionEnd();
7735                hideControllers();
7736                Selection.setSelection((Spannable) mText, selStart, selEnd);
7737            } else {
7738                hideControllers();
7739            }
7740
7741            // No need to create the controller
7742            if (mSelectionModifierCursorController != null) {
7743                mSelectionModifierCursorController.resetTouchOffsets();
7744            }
7745        }
7746
7747        startStopMarquee(focused);
7748
7749        if (mTransformation != null) {
7750            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7751        }
7752
7753        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7754    }
7755
7756    private int getLastTapPosition() {
7757        // No need to create the controller at that point, no last tap position saved
7758        if (mSelectionModifierCursorController != null) {
7759            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7760            if (lastTapPosition >= 0) {
7761                // Safety check, should not be possible.
7762                if (lastTapPosition > mText.length()) {
7763                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7764                            + mText.length() + ")");
7765                    lastTapPosition = mText.length();
7766                }
7767                return lastTapPosition;
7768            }
7769        }
7770
7771        return -1;
7772    }
7773
7774    @Override
7775    public void onWindowFocusChanged(boolean hasWindowFocus) {
7776        super.onWindowFocusChanged(hasWindowFocus);
7777
7778        if (hasWindowFocus) {
7779            if (mBlink != null) {
7780                mBlink.uncancel();
7781                makeBlink();
7782            }
7783        } else {
7784            if (mBlink != null) {
7785                mBlink.cancel();
7786            }
7787            // Don't leave us in the middle of a batch edit.
7788            onEndBatchEdit();
7789            if (mInputContentType != null) {
7790                mInputContentType.enterDown = false;
7791            }
7792            hideControllers();
7793            removeAllSuggestionSpans();
7794        }
7795
7796        startStopMarquee(hasWindowFocus);
7797    }
7798
7799    private void removeAllSuggestionSpans() {
7800        if (mText instanceof Editable) {
7801            Editable editable = ((Editable) mText);
7802            SuggestionSpan[] spans = editable.getSpans(0, mText.length(), SuggestionSpan.class);
7803            final int length = spans.length;
7804            for (int i = 0; i < length; i++) {
7805                editable.removeSpan(spans[i]);
7806            }
7807        }
7808    }
7809
7810    @Override
7811    protected void onVisibilityChanged(View changedView, int visibility) {
7812        super.onVisibilityChanged(changedView, visibility);
7813        if (visibility != VISIBLE) {
7814            hideControllers();
7815        }
7816    }
7817
7818    /**
7819     * Use {@link BaseInputConnection#removeComposingSpans
7820     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7821     * state from this text view.
7822     */
7823    public void clearComposingText() {
7824        if (mText instanceof Spannable) {
7825            BaseInputConnection.removeComposingSpans((Spannable)mText);
7826        }
7827    }
7828
7829    @Override
7830    public void setSelected(boolean selected) {
7831        boolean wasSelected = isSelected();
7832
7833        super.setSelected(selected);
7834
7835        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7836            if (selected) {
7837                startMarquee();
7838            } else {
7839                stopMarquee();
7840            }
7841        }
7842    }
7843
7844    @Override
7845    public boolean onTouchEvent(MotionEvent event) {
7846        final int action = event.getActionMasked();
7847
7848        if (hasSelectionController()) {
7849            getSelectionController().onTouchEvent(event);
7850        }
7851
7852        if (action == MotionEvent.ACTION_DOWN) {
7853            mLastDownPositionX = event.getX();
7854            mLastDownPositionY = event.getY();
7855
7856            // Reset this state; it will be re-set if super.onTouchEvent
7857            // causes focus to move to the view.
7858            mTouchFocusSelected = false;
7859            mIgnoreActionUpEvent = false;
7860        }
7861
7862        final boolean superResult = super.onTouchEvent(event);
7863
7864        /*
7865         * Don't handle the release after a long press, because it will
7866         * move the selection away from whatever the menu action was
7867         * trying to affect.
7868         */
7869        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7870            mDiscardNextActionUp = false;
7871            return superResult;
7872        }
7873
7874        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7875                isFocused();
7876
7877        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7878                && mText instanceof Spannable && mLayout != null) {
7879            boolean handled = false;
7880
7881            if (mMovement != null) {
7882                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7883            }
7884
7885            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7886                // The LinkMovementMethod which should handle taps on links has not been installed
7887                // to support text selection. We reproduce its behavior here to open links.
7888                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7889                        getSelectionEnd(), ClickableSpan.class);
7890
7891                if (links.length != 0) {
7892                    links[0].onClick(this);
7893                    handled = true;
7894                }
7895            }
7896
7897            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7898                // Show the IME, except when selecting in read-only text.
7899                final InputMethodManager imm = InputMethodManager.peekInstance();
7900                if (imm != null) {
7901                    imm.viewClicked(this);
7902                }
7903                if (!mTextIsSelectable) {
7904                    handled |= imm != null && imm.showSoftInput(this, 0);
7905                }
7906
7907                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7908                if (!selectAllGotFocus && hasSelection()) {
7909                    startSelectionActionMode();
7910                } else {
7911                    hideControllers();
7912                    if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7913                        getInsertionController().show();
7914                    }
7915                }
7916            }
7917
7918            if (handled) {
7919                return true;
7920            }
7921        }
7922
7923        return superResult;
7924    }
7925
7926    @Override
7927    public boolean onGenericMotionEvent(MotionEvent event) {
7928        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7929            try {
7930                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7931                    return true;
7932                }
7933            } catch (AbstractMethodError ex) {
7934                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7935                // Ignore its absence in case third party applications implemented the
7936                // interface directly.
7937            }
7938        }
7939        return super.onGenericMotionEvent(event);
7940    }
7941
7942    private void prepareCursorControllers() {
7943        boolean windowSupportsHandles = false;
7944
7945        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7946        if (params instanceof WindowManager.LayoutParams) {
7947            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7948            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7949                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7950        }
7951
7952        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7953        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7954                mLayout != null;
7955
7956        if (!mInsertionControllerEnabled) {
7957            hideInsertionPointCursorController();
7958            if (mInsertionPointCursorController != null) {
7959                mInsertionPointCursorController.onDetached();
7960                mInsertionPointCursorController = null;
7961            }
7962        }
7963
7964        if (!mSelectionControllerEnabled) {
7965            stopSelectionActionMode();
7966            if (mSelectionModifierCursorController != null) {
7967                mSelectionModifierCursorController.onDetached();
7968                mSelectionModifierCursorController = null;
7969            }
7970        }
7971    }
7972
7973    /**
7974     * @return True iff this TextView contains a text that can be edited, or if this is
7975     * a selectable TextView.
7976     */
7977    private boolean isTextEditable() {
7978        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7979    }
7980
7981    /**
7982     * Returns true, only while processing a touch gesture, if the initial
7983     * touch down event caused focus to move to the text view and as a result
7984     * its selection changed.  Only valid while processing the touch gesture
7985     * of interest.
7986     */
7987    public boolean didTouchFocusSelect() {
7988        return mTouchFocusSelected;
7989    }
7990
7991    @Override
7992    public void cancelLongPress() {
7993        super.cancelLongPress();
7994        mIgnoreActionUpEvent = true;
7995    }
7996
7997    @Override
7998    public boolean onTrackballEvent(MotionEvent event) {
7999        if (mMovement != null && mText instanceof Spannable &&
8000            mLayout != null) {
8001            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8002                return true;
8003            }
8004        }
8005
8006        return super.onTrackballEvent(event);
8007    }
8008
8009    public void setScroller(Scroller s) {
8010        mScroller = s;
8011    }
8012
8013    private static class Blink extends Handler implements Runnable {
8014        private final WeakReference<TextView> mView;
8015        private boolean mCancelled;
8016
8017        public Blink(TextView v) {
8018            mView = new WeakReference<TextView>(v);
8019        }
8020
8021        public void run() {
8022            if (mCancelled) {
8023                return;
8024            }
8025
8026            removeCallbacks(Blink.this);
8027
8028            TextView tv = mView.get();
8029
8030            if (tv != null && tv.shouldBlink()) {
8031                if (tv.mLayout != null) {
8032                    tv.invalidateCursorPath();
8033                }
8034
8035                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8036            }
8037        }
8038
8039        void cancel() {
8040            if (!mCancelled) {
8041                removeCallbacks(Blink.this);
8042                mCancelled = true;
8043            }
8044        }
8045
8046        void uncancel() {
8047            mCancelled = false;
8048        }
8049    }
8050
8051    /**
8052     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8053     */
8054    private boolean shouldBlink() {
8055        if (!isFocused()) return false;
8056
8057        final int start = getSelectionStart();
8058        if (start < 0) return false;
8059
8060        final int end = getSelectionEnd();
8061        if (end < 0) return false;
8062
8063        return start == end;
8064    }
8065
8066    private void makeBlink() {
8067        if (isCursorVisible()) {
8068            if (shouldBlink()) {
8069                mShowCursor = SystemClock.uptimeMillis();
8070                if (mBlink == null) mBlink = new Blink(this);
8071                mBlink.removeCallbacks(mBlink);
8072                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8073            }
8074        } else {
8075            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8076        }
8077    }
8078
8079    @Override
8080    protected float getLeftFadingEdgeStrength() {
8081        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8082        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8083            if (mMarquee != null && !mMarquee.isStopped()) {
8084                final Marquee marquee = mMarquee;
8085                if (marquee.shouldDrawLeftFade()) {
8086                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8087                } else {
8088                    return 0.0f;
8089                }
8090            } else if (getLineCount() == 1) {
8091                final int layoutDirection = getResolvedLayoutDirection();
8092                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8093                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8094                    case Gravity.LEFT:
8095                        return 0.0f;
8096                    case Gravity.RIGHT:
8097                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8098                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8099                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8100                    case Gravity.CENTER_HORIZONTAL:
8101                        return 0.0f;
8102                }
8103            }
8104        }
8105        return super.getLeftFadingEdgeStrength();
8106    }
8107
8108    @Override
8109    protected float getRightFadingEdgeStrength() {
8110        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8111        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8112            if (mMarquee != null && !mMarquee.isStopped()) {
8113                final Marquee marquee = mMarquee;
8114                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8115            } else if (getLineCount() == 1) {
8116                final int layoutDirection = getResolvedLayoutDirection();
8117                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8118                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8119                    case Gravity.LEFT:
8120                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8121                                getCompoundPaddingRight();
8122                        final float lineWidth = mLayout.getLineWidth(0);
8123                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8124                    case Gravity.RIGHT:
8125                        return 0.0f;
8126                    case Gravity.CENTER_HORIZONTAL:
8127                    case Gravity.FILL_HORIZONTAL:
8128                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8129                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8130                                getHorizontalFadingEdgeLength();
8131                }
8132            }
8133        }
8134        return super.getRightFadingEdgeStrength();
8135    }
8136
8137    @Override
8138    protected int computeHorizontalScrollRange() {
8139        if (mLayout != null) {
8140            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8141                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8142        }
8143
8144        return super.computeHorizontalScrollRange();
8145    }
8146
8147    @Override
8148    protected int computeVerticalScrollRange() {
8149        if (mLayout != null)
8150            return mLayout.getHeight();
8151
8152        return super.computeVerticalScrollRange();
8153    }
8154
8155    @Override
8156    protected int computeVerticalScrollExtent() {
8157        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8158    }
8159
8160    @Override
8161    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched) {
8162        if (TextUtils.isEmpty(searched)) {
8163            return;
8164        }
8165        CharSequence thisText = getText();
8166        if (TextUtils.isEmpty(thisText)) {
8167            return;
8168        }
8169        String searchedLowerCase = searched.toString().toLowerCase();
8170        String thisTextLowerCase = thisText.toString().toLowerCase();
8171        if (thisTextLowerCase.contains(searchedLowerCase)) {
8172            outViews.add(this);
8173        }
8174    }
8175
8176    public enum BufferType {
8177        NORMAL, SPANNABLE, EDITABLE,
8178    }
8179
8180    /**
8181     * Returns the TextView_textColor attribute from the
8182     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8183     * from the TextView_textAppearance attribute, if TextView_textColor
8184     * was not set directly.
8185     */
8186    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8187        ColorStateList colors;
8188        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8189                                         TextView_textColor);
8190
8191        if (colors == null) {
8192            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8193                                         TextView_textAppearance, -1);
8194            if (ap != -1) {
8195                TypedArray appearance;
8196                appearance = context.obtainStyledAttributes(ap,
8197                                            com.android.internal.R.styleable.TextAppearance);
8198                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8199                                                  TextAppearance_textColor);
8200                appearance.recycle();
8201            }
8202        }
8203
8204        return colors;
8205    }
8206
8207    /**
8208     * Returns the default color from the TextView_textColor attribute
8209     * from the AttributeSet, if set, or the default color from the
8210     * TextAppearance_textColor from the TextView_textAppearance attribute,
8211     * if TextView_textColor was not set directly.
8212     */
8213    public static int getTextColor(Context context,
8214                                   TypedArray attrs,
8215                                   int def) {
8216        ColorStateList colors = getTextColors(context, attrs);
8217
8218        if (colors == null) {
8219            return def;
8220        } else {
8221            return colors.getDefaultColor();
8222        }
8223    }
8224
8225    @Override
8226    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8227        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8228        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8229            switch (keyCode) {
8230            case KeyEvent.KEYCODE_A:
8231                if (canSelectText()) {
8232                    return onTextContextMenuItem(ID_SELECT_ALL);
8233                }
8234                break;
8235            case KeyEvent.KEYCODE_X:
8236                if (canCut()) {
8237                    return onTextContextMenuItem(ID_CUT);
8238                }
8239                break;
8240            case KeyEvent.KEYCODE_C:
8241                if (canCopy()) {
8242                    return onTextContextMenuItem(ID_COPY);
8243                }
8244                break;
8245            case KeyEvent.KEYCODE_V:
8246                if (canPaste()) {
8247                    return onTextContextMenuItem(ID_PASTE);
8248                }
8249                break;
8250            }
8251        }
8252        return super.onKeyShortcut(keyCode, event);
8253    }
8254
8255    /**
8256     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8257     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8258     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8259     */
8260    private boolean canSelectText() {
8261        return hasSelectionController() && mText.length() != 0;
8262    }
8263
8264    /**
8265     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8266     * The text must be spannable and the movement method must allow for arbitary selection.
8267     *
8268     * See also {@link #canSelectText()}.
8269     */
8270    private boolean textCanBeSelected() {
8271        // prepareCursorController() relies on this method.
8272        // If you change this condition, make sure prepareCursorController is called anywhere
8273        // the value of this condition might be changed.
8274        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8275        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8276    }
8277
8278    private boolean canCut() {
8279        if (hasPasswordTransformationMethod()) {
8280            return false;
8281        }
8282
8283        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8284            return true;
8285        }
8286
8287        return false;
8288    }
8289
8290    private boolean canCopy() {
8291        if (hasPasswordTransformationMethod()) {
8292            return false;
8293        }
8294
8295        if (mText.length() > 0 && hasSelection()) {
8296            return true;
8297        }
8298
8299        return false;
8300    }
8301
8302    private boolean canPaste() {
8303        return (mText instanceof Editable &&
8304                mInput != null &&
8305                getSelectionStart() >= 0 &&
8306                getSelectionEnd() >= 0 &&
8307                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8308                hasPrimaryClip());
8309    }
8310
8311    private static long packRangeInLong(int start, int end) {
8312        return (((long) start) << 32) | end;
8313    }
8314
8315    private static int extractRangeStartFromLong(long range) {
8316        return (int) (range >>> 32);
8317    }
8318
8319    private static int extractRangeEndFromLong(long range) {
8320        return (int) (range & 0x00000000FFFFFFFFL);
8321    }
8322
8323    private boolean selectAll() {
8324        final int length = mText.length();
8325        Selection.setSelection((Spannable) mText, 0, length);
8326        return length > 0;
8327    }
8328
8329    /**
8330     * Adjusts selection to the word under last touch offset.
8331     * Return true if the operation was successfully performed.
8332     */
8333    private boolean selectCurrentWord() {
8334        if (!canSelectText()) {
8335            return false;
8336        }
8337
8338        if (hasPasswordTransformationMethod()) {
8339            // Always select all on a password field.
8340            // Cut/copy menu entries are not available for passwords, but being able to select all
8341            // is however useful to delete or paste to replace the entire content.
8342            return selectAll();
8343        }
8344
8345        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8346        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8347
8348        // Specific text field types: select the entire text for these
8349        if (klass == InputType.TYPE_CLASS_NUMBER ||
8350                klass == InputType.TYPE_CLASS_PHONE ||
8351                klass == InputType.TYPE_CLASS_DATETIME ||
8352                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8353                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8354                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8355                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8356            return selectAll();
8357        }
8358
8359        long lastTouchOffsets = getLastTouchOffsets();
8360        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8361        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8362
8363        // Safety check in case standard touch event handling has been bypassed
8364        if (minOffset < 0 || minOffset >= mText.length()) return false;
8365        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8366
8367        int selectionStart, selectionEnd;
8368
8369        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8370        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8371        if (urlSpans.length == 1) {
8372            URLSpan url = urlSpans[0];
8373            selectionStart = ((Spanned) mText).getSpanStart(url);
8374            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8375        } else {
8376            if (mWordIterator == null) {
8377                mWordIterator = new WordIterator();
8378            }
8379            // WordIerator handles text changes, this is a no-op if text in unchanged.
8380            mWordIterator.setCharSequence(mText);
8381
8382            selectionStart = mWordIterator.getBeginning(minOffset);
8383            if (selectionStart == BreakIterator.DONE) return false;
8384
8385            selectionEnd = mWordIterator.getEnd(maxOffset);
8386            if (selectionEnd == BreakIterator.DONE) return false;
8387        }
8388
8389        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8390        return true;
8391    }
8392
8393    private long getLastTouchOffsets() {
8394        int minOffset, maxOffset;
8395
8396        if (mContextMenuTriggeredByKey) {
8397            minOffset = getSelectionStart();
8398            maxOffset = getSelectionEnd();
8399        } else {
8400            SelectionModifierCursorController selectionController = getSelectionController();
8401            minOffset = selectionController.getMinTouchOffset();
8402            maxOffset = selectionController.getMaxTouchOffset();
8403        }
8404
8405        return packRangeInLong(minOffset, maxOffset);
8406    }
8407
8408    @Override
8409    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8410        super.onPopulateAccessibilityEvent(event);
8411
8412        final boolean isPassword = hasPasswordTransformationMethod();
8413        if (!isPassword) {
8414            CharSequence text = getText();
8415            if (TextUtils.isEmpty(text)) {
8416                text = getHint();
8417            }
8418            if (TextUtils.isEmpty(text)) {
8419                text = getContentDescription();
8420            }
8421            if (!TextUtils.isEmpty(text)) {
8422                event.getText().add(text);
8423            }
8424        }
8425    }
8426
8427    @Override
8428    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8429        super.onInitializeAccessibilityEvent(event);
8430
8431        final boolean isPassword = hasPasswordTransformationMethod();
8432        event.setPassword(isPassword);
8433
8434        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8435            event.setFromIndex(Selection.getSelectionStart(mText));
8436            event.setToIndex(Selection.getSelectionEnd(mText));
8437            event.setItemCount(mText.length());
8438        }
8439    }
8440
8441    @Override
8442    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
8443        super.onInitializeAccessibilityNodeInfo(info);
8444
8445        final boolean isPassword = hasPasswordTransformationMethod();
8446        if (!isPassword) {
8447            info.setText(getText());
8448        }
8449        info.setPassword(isPassword);
8450    }
8451
8452    @Override
8453    public void sendAccessibilityEvent(int eventType) {
8454        // Do not send scroll events since first they are not interesting for
8455        // accessibility and second such events a generated too frequently.
8456        // For details see the implementation of bringTextIntoView().
8457        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
8458            return;
8459        }
8460        super.sendAccessibilityEvent(eventType);
8461    }
8462
8463    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8464            int fromIndex, int removedCount, int addedCount) {
8465        AccessibilityEvent event =
8466            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8467        event.setFromIndex(fromIndex);
8468        event.setRemovedCount(removedCount);
8469        event.setAddedCount(addedCount);
8470        event.setBeforeText(beforeText);
8471        sendAccessibilityEventUnchecked(event);
8472    }
8473
8474    @Override
8475    protected void onCreateContextMenu(ContextMenu menu) {
8476        super.onCreateContextMenu(menu);
8477        boolean added = false;
8478        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
8479        // Problem with context menu on long press: the menu appears while the key in down and when
8480        // the key is released, the view does not receive the key_up event.
8481        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
8482        // events. We cannot simply clear these flags in onTextContextMenuItem since
8483        // it may not be called (if the user/ discards the context menu with the back key).
8484        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
8485        // available in onTextContextMenuItem.
8486        mDPadCenterIsDown = mEnterKeyIsDown = false;
8487
8488        MenuHandler handler = new MenuHandler();
8489
8490        if (mText instanceof Spanned && hasSelectionController()) {
8491            long lastTouchOffset = getLastTouchOffsets();
8492            final int selStart = extractRangeStartFromLong(lastTouchOffset);
8493            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
8494
8495            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
8496            if (urls.length > 0) {
8497                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
8498                        setOnMenuItemClickListener(handler);
8499
8500                added = true;
8501            }
8502        }
8503
8504        // The context menu is not empty, which will prevent the selection mode from starting.
8505        // Add a entry to start it in the context menu.
8506        // TODO Does not handle the case where a subclass does not call super.thisMethod or
8507        // populates the menu AFTER this call.
8508        if (menu.size() > 0) {
8509            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
8510                    setOnMenuItemClickListener(handler);
8511            added = true;
8512        }
8513
8514        if (added) {
8515            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
8516        }
8517    }
8518
8519    /**
8520     * Returns whether this text view is a current input method target.  The
8521     * default implementation just checks with {@link InputMethodManager}.
8522     */
8523    public boolean isInputMethodTarget() {
8524        InputMethodManager imm = InputMethodManager.peekInstance();
8525        return imm != null && imm.isActive(this);
8526    }
8527
8528    // Selection context mode
8529    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8530    private static final int ID_CUT = android.R.id.cut;
8531    private static final int ID_COPY = android.R.id.copy;
8532    private static final int ID_PASTE = android.R.id.paste;
8533    // Context menu entries
8534    private static final int ID_COPY_URL = android.R.id.copyUrl;
8535    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8536
8537    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8538        public boolean onMenuItemClick(MenuItem item) {
8539            return onTextContextMenuItem(item.getItemId());
8540        }
8541    }
8542
8543    /**
8544     * Called when a context menu option for the text view is selected.  Currently
8545     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8546     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8547     * or {@link android.R.id#copy}.
8548     *
8549     * @return true if the context menu item action was performed.
8550     */
8551    public boolean onTextContextMenuItem(int id) {
8552        int min = 0;
8553        int max = mText.length();
8554
8555        if (isFocused()) {
8556            final int selStart = getSelectionStart();
8557            final int selEnd = getSelectionEnd();
8558
8559            min = Math.max(0, Math.min(selStart, selEnd));
8560            max = Math.max(0, Math.max(selStart, selEnd));
8561        }
8562
8563        switch (id) {
8564            case ID_COPY_URL:
8565                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8566                if (urls.length >= 1) {
8567                    ClipData clip = null;
8568                    for (int i=0; i<urls.length; i++) {
8569                        Uri uri = Uri.parse(urls[0].getURL());
8570                        if (clip == null) {
8571                            clip = ClipData.newRawUri(null, uri);
8572                        } else {
8573                            clip.addItem(new ClipData.Item(uri));
8574                        }
8575                    }
8576                    if (clip != null) {
8577                        setPrimaryClip(clip);
8578                    }
8579                }
8580                stopSelectionActionMode();
8581                return true;
8582
8583            case ID_SELECTION_MODE:
8584                if (mSelectionActionMode != null) {
8585                    // Selection mode is already started, simply change selected part.
8586                    selectCurrentWord();
8587                } else {
8588                    startSelectionActionMode();
8589                }
8590                return true;
8591
8592            case ID_SELECT_ALL:
8593                // This does not enter text selection mode. Text is highlighted, so that it can be
8594                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8595                selectAll();
8596                return true;
8597
8598            case ID_PASTE:
8599                paste(min, max);
8600                return true;
8601
8602            case ID_CUT:
8603                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8604                ((Editable) mText).delete(min, max);
8605                stopSelectionActionMode();
8606                return true;
8607
8608            case ID_COPY:
8609                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8610                stopSelectionActionMode();
8611                return true;
8612        }
8613        return false;
8614    }
8615
8616    /**
8617     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8618     * by [min, max] when replacing this region by paste.
8619     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8620     * make sure we do not add an extra one from the paste content.
8621     */
8622    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8623        if (paste.length() > 0) {
8624            if (min > 0) {
8625                final char charBefore = mTransformed.charAt(min - 1);
8626                final char charAfter = paste.charAt(0);
8627
8628                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8629                    // Two spaces at beginning of paste: remove one
8630                    final int originalLength = mText.length();
8631                    ((Editable) mText).delete(min - 1, min);
8632                    // Due to filters, there is no guarantee that exactly one character was
8633                    // removed: count instead.
8634                    final int delta = mText.length() - originalLength;
8635                    min += delta;
8636                    max += delta;
8637                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8638                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8639                    // No space at beginning of paste: add one
8640                    final int originalLength = mText.length();
8641                    ((Editable) mText).replace(min, min, " ");
8642                    // Taking possible filters into account as above.
8643                    final int delta = mText.length() - originalLength;
8644                    min += delta;
8645                    max += delta;
8646                }
8647            }
8648
8649            if (max < mText.length()) {
8650                final char charBefore = paste.charAt(paste.length() - 1);
8651                final char charAfter = mTransformed.charAt(max);
8652
8653                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8654                    // Two spaces at end of paste: remove one
8655                    ((Editable) mText).delete(max, max + 1);
8656                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8657                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8658                    // No space at end of paste: add one
8659                    ((Editable) mText).replace(max, max, " ");
8660                }
8661            }
8662        }
8663
8664        return packRangeInLong(min, max);
8665    }
8666
8667    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8668        TextView shadowView = (TextView) inflate(mContext,
8669                com.android.internal.R.layout.text_drag_thumbnail, null);
8670
8671        if (shadowView == null) {
8672            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8673        }
8674
8675        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8676            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8677        }
8678        shadowView.setText(text);
8679        shadowView.setTextColor(getTextColors());
8680
8681        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8682        shadowView.setGravity(Gravity.CENTER);
8683
8684        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8685                ViewGroup.LayoutParams.WRAP_CONTENT));
8686
8687        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8688        shadowView.measure(size, size);
8689
8690        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8691        shadowView.invalidate();
8692        return new DragShadowBuilder(shadowView);
8693    }
8694
8695    private static class DragLocalState {
8696        public TextView sourceTextView;
8697        public int start, end;
8698
8699        public DragLocalState(TextView sourceTextView, int start, int end) {
8700            this.sourceTextView = sourceTextView;
8701            this.start = start;
8702            this.end = end;
8703        }
8704    }
8705
8706    @Override
8707    public boolean performLongClick() {
8708        if (super.performLongClick()) {
8709            mDiscardNextActionUp = true;
8710            return true;
8711        }
8712
8713        boolean handled = false;
8714
8715        // Long press in empty space moves cursor and shows the Paste affordance if available.
8716        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8717                mInsertionControllerEnabled) {
8718            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
8719            stopSelectionActionMode();
8720            Selection.setSelection((Spannable) mText, offset);
8721            getInsertionController().showImmediately();
8722            handled = true;
8723        }
8724
8725        if (!handled && mSelectionActionMode != null) {
8726            if (touchPositionIsInSelection()) {
8727                // Start a drag
8728                final int start = getSelectionStart();
8729                final int end = getSelectionEnd();
8730                CharSequence selectedText = mTransformed.subSequence(start, end);
8731                ClipData data = ClipData.newPlainText(null, selectedText);
8732                DragLocalState localState = new DragLocalState(this, start, end);
8733                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8734                stopSelectionActionMode();
8735            } else {
8736                selectCurrentWord();
8737            }
8738            handled = true;
8739        }
8740
8741        // Start a new selection
8742        handled |= !handled && startSelectionActionMode();
8743
8744        if (handled) {
8745            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8746            mDiscardNextActionUp = true;
8747        }
8748
8749        return handled;
8750    }
8751
8752    private boolean touchPositionIsInSelection() {
8753        int selectionStart = getSelectionStart();
8754        int selectionEnd = getSelectionEnd();
8755
8756        if (selectionStart == selectionEnd) {
8757            return false;
8758        }
8759
8760        if (selectionStart > selectionEnd) {
8761            int tmp = selectionStart;
8762            selectionStart = selectionEnd;
8763            selectionEnd = tmp;
8764            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8765        }
8766
8767        SelectionModifierCursorController selectionController = getSelectionController();
8768        int minOffset = selectionController.getMinTouchOffset();
8769        int maxOffset = selectionController.getMaxTouchOffset();
8770
8771        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8772    }
8773
8774    private PositionListener getPositionListener() {
8775        if (mPositionListener == null) {
8776            mPositionListener = new PositionListener();
8777        }
8778        return mPositionListener;
8779    }
8780
8781    private interface TextViewPositionListener {
8782        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified);
8783    }
8784
8785    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
8786        // 3 handles, 2 ActionPopup (suggestionsPopup first hides the others)
8787        private final int MAXIMUM_NUMBER_OF_LISTENERS = 5;
8788        private TextViewPositionListener[] mPositionListeners =
8789                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
8790        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
8791        private boolean mPositionHasChanged = true;
8792        // Absolute position of the TextView with respect to its parent window
8793        private int mPositionX, mPositionY;
8794        private int mNumberOfListeners;
8795
8796        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
8797            if (mNumberOfListeners == 0) {
8798                updatePosition();
8799                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8800                vto.addOnPreDrawListener(this);
8801            }
8802
8803            int emptySlotIndex = -1;
8804            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8805                TextViewPositionListener listener = mPositionListeners[i];
8806                if (listener == positionListener) {
8807                    return;
8808                } else if (emptySlotIndex < 0 && listener == null) {
8809                    emptySlotIndex = i;
8810                }
8811            }
8812
8813            mPositionListeners[emptySlotIndex] = positionListener;
8814            mCanMove[emptySlotIndex] = canMove;
8815            mNumberOfListeners++;
8816        }
8817
8818        public void removeSubscriber(TextViewPositionListener positionListener) {
8819            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8820                if (mPositionListeners[i] == positionListener) {
8821                    mPositionListeners[i] = null;
8822                    mNumberOfListeners--;
8823                    break;
8824                }
8825            }
8826
8827            if (mNumberOfListeners == 0) {
8828                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8829                vto.removeOnPreDrawListener(this);
8830            }
8831        }
8832
8833        public int getPositionX() {
8834            return mPositionX;
8835        }
8836
8837        public int getPositionY() {
8838            return mPositionY;
8839        }
8840
8841        @Override
8842        public boolean onPreDraw() {
8843            updatePosition();
8844
8845            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8846                if (mPositionHasChanged || mCanMove[i]) {
8847                    TextViewPositionListener positionListener = mPositionListeners[i];
8848                    if (positionListener != null) {
8849                        positionListener.updatePosition(mPositionX, mPositionY,
8850                                mPositionHasChanged);
8851                    }
8852                }
8853            }
8854
8855            return true;
8856        }
8857
8858        private void updatePosition() {
8859            TextView.this.getLocationInWindow(mTempCoords);
8860
8861            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
8862
8863            mPositionX = mTempCoords[0];
8864            mPositionY = mTempCoords[1];
8865        }
8866
8867        public boolean isVisible(int positionX, int positionY) {
8868            final TextView textView = TextView.this;
8869
8870            if (mTempRect == null) mTempRect = new Rect();
8871            final Rect clip = mTempRect;
8872            clip.left = getCompoundPaddingLeft();
8873            clip.top = getExtendedPaddingTop();
8874            clip.right = textView.getWidth() - getCompoundPaddingRight();
8875            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
8876
8877            final ViewParent parent = textView.getParent();
8878            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
8879                return false;
8880            }
8881
8882            int posX = mPositionX + positionX;
8883            int posY = mPositionY + positionY;
8884
8885            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
8886            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
8887                    posY >= clip.top && posY <= clip.bottom;
8888        }
8889
8890        public boolean isOffsetVisible(int offset) {
8891            final int line = mLayout.getLineForOffset(offset);
8892            final int lineBottom = mLayout.getLineBottom(line);
8893            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
8894            return isVisible(primaryHorizontal, lineBottom);
8895        }
8896    }
8897
8898    private abstract class PinnedPopupWindow implements TextViewPositionListener {
8899        protected PopupWindow mPopupWindow;
8900        protected LinearLayout mContentView;
8901        int mPositionX, mPositionY;
8902
8903        protected abstract void createPopupWindow();
8904        protected abstract void initContentView();
8905        protected abstract int getTextOffset();
8906        protected abstract int getVerticalLocalPosition(int line);
8907        protected abstract int clipVertically(int positionY);
8908
8909        public PinnedPopupWindow() {
8910            createPopupWindow();
8911
8912            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8913            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8914            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8915
8916            mContentView = new LinearLayout(TextView.this.getContext());
8917            LayoutParams wrapContent = new LayoutParams(
8918                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
8919            mContentView.setLayoutParams(wrapContent);
8920
8921            initContentView();
8922            mPopupWindow.setContentView(mContentView);
8923        }
8924
8925        public void show() {
8926            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
8927            mContentView.measure(
8928                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
8929                            View.MeasureSpec.AT_MOST),
8930                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
8931                            View.MeasureSpec.AT_MOST));
8932
8933            TextView.this.getPositionListener().addSubscriber(this, false);
8934
8935            computeLocalPosition();
8936
8937            final PositionListener positionListener = TextView.this.getPositionListener();
8938            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
8939        }
8940
8941        private void computeLocalPosition() {
8942            final int offset = getTextOffset();
8943
8944            final int width = mContentView.getMeasuredWidth();
8945            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
8946            mPositionX += viewportToContentHorizontalOffset();
8947
8948            final int line = mLayout.getLineForOffset(offset);
8949            mPositionY = getVerticalLocalPosition(line);
8950            mPositionY += viewportToContentVerticalOffset();
8951        }
8952
8953        private void updatePosition(int parentPositionX, int parentPositionY) {
8954            int positionX = parentPositionX + mPositionX;
8955            int positionY = parentPositionY + mPositionY;
8956
8957            positionY = clipVertically(positionY);
8958
8959            // Horizontal clipping
8960            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
8961            final int width = mContentView.getMeasuredWidth();
8962            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
8963            positionX = Math.max(0, positionX);
8964
8965            if (isShowing()) {
8966                mPopupWindow.update(positionX, positionY, -1, -1);
8967            } else {
8968                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
8969                        positionX, positionY);
8970            }
8971        }
8972
8973        public void hide() {
8974            mPopupWindow.dismiss();
8975            TextView.this.getPositionListener().removeSubscriber(this);
8976        }
8977
8978        @Override
8979        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
8980            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
8981                updatePosition(parentPositionX, parentPositionY);
8982            } else {
8983                hide();
8984            }
8985        }
8986
8987        public boolean isShowing() {
8988            return mPopupWindow.isShowing();
8989        }
8990    }
8991
8992    private static class SuggestionRangeSpan extends UnderlineSpan {
8993        // TODO themable, would be nice to make it a child class of TextAppearanceSpan, but
8994        // there is no way to have underline and TextAppearanceSpan.
8995    }
8996
8997    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnClickListener {
8998        private static final int MAX_NUMBER_SUGGESTIONS = 5;
8999        private static final int NO_SUGGESTIONS = -1;
9000        private WordIterator mSuggestionWordIterator;
9001        private TextAppearanceSpan[] mHighlightSpans = new TextAppearanceSpan[0];
9002
9003        @Override
9004        protected void createPopupWindow() {
9005            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9006                com.android.internal.R.attr.textSuggestionsWindowStyle);
9007            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9008            mPopupWindow.setOutsideTouchable(true);
9009            mPopupWindow.setClippingEnabled(false);
9010        }
9011
9012        @Override
9013        protected void initContentView() {
9014            mContentView.setOrientation(LinearLayout.VERTICAL);
9015
9016            LayoutInflater inflater = (LayoutInflater) TextView.this.mContext.
9017                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9018
9019            if (inflater == null) {
9020                throw new IllegalArgumentException(
9021                        "Unable to create inflater for TextEdit suggestions");
9022            }
9023
9024            // Inflate the suggestion items once and for all.
9025            for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
9026                View childView = inflater.inflate(mTextEditSuggestionItemLayout,
9027                        mContentView, false);
9028
9029                if (! (childView instanceof TextView)) {
9030                    throw new IllegalArgumentException(
9031                            "Inflated TextEdit suggestion item is not a TextView: " + childView);
9032                }
9033
9034                childView.setTag(new SuggestionInfo());
9035                mContentView.addView(childView);
9036                childView.setOnClickListener(this);
9037            }
9038        }
9039
9040        private class SuggestionInfo {
9041            int suggestionStart, suggestionEnd; // range of suggestion item with replacement text
9042            int spanStart, spanEnd; // range in TextView where text should be inserted
9043            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9044            int suggestionIndex; // the index of the suggestion inside suggestionSpan
9045        }
9046
9047        /**
9048         * Returns the suggestion spans that cover the current cursor position. The suggestion
9049         * spans are sorted according to the length of text that they are attached to.
9050         */
9051        private SuggestionSpan[] getSuggestionSpans() {
9052            int pos = TextView.this.getSelectionStart();
9053            Spannable spannable = (Spannable) TextView.this.mText;
9054            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9055
9056            // Cache the span length for performance reason.
9057            final HashMap<SuggestionSpan, Integer> spansLengths =
9058                    new HashMap<SuggestionSpan, Integer>();
9059
9060            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9061                int start = spannable.getSpanStart(suggestionSpan);
9062                int end = spannable.getSpanEnd(suggestionSpan);
9063                spansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9064            }
9065
9066            // The suggestions are sorted according to the lenght of the text that they cover
9067            // (shorter first)
9068            Arrays.sort(suggestionSpans, new Comparator<SuggestionSpan>() {
9069                public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9070                    return spansLengths.get(span1).intValue() - spansLengths.get(span2).intValue();
9071                }
9072            });
9073
9074            return suggestionSpans;
9075        }
9076
9077        @Override
9078        public void show() {
9079            if (!(mText instanceof Editable)) return;
9080            updateSuggestions();
9081
9082            super.show();
9083        }
9084
9085        @Override
9086        protected int getTextOffset() {
9087            return getSelectionStart();
9088        }
9089
9090        @Override
9091        protected int getVerticalLocalPosition(int line) {
9092            return mLayout.getLineBottom(line);
9093        }
9094
9095        @Override
9096        protected int clipVertically(int positionY) {
9097            final int height = mContentView.getMeasuredHeight();
9098            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9099            return Math.min(positionY, displayMetrics.heightPixels - height);
9100        }
9101
9102        @Override
9103        public void hide() {
9104            super.hide();
9105            if ((mText instanceof Editable) && mSuggestionRangeSpan != null) {
9106                ((Editable) mText).removeSpan(mSuggestionRangeSpan);
9107            }
9108        }
9109
9110        private void updateSuggestions() {
9111            Spannable spannable = (Spannable)TextView.this.mText;
9112            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9113
9114            final int nbSpans = suggestionSpans.length;
9115
9116            int totalNbSuggestions = 0;
9117            int spanUnionStart = mText.length();
9118            int spanUnionEnd = 0;
9119
9120            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9121                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9122                final int spanStart = spannable.getSpanStart(suggestionSpan);
9123                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9124                spanUnionStart = Math.min(spanStart, spanUnionStart);
9125                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9126
9127                String[] suggestions = suggestionSpan.getSuggestions();
9128                int nbSuggestions = suggestions.length;
9129                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9130                    TextView textView = (TextView) mContentView.getChildAt(
9131                            totalNbSuggestions);
9132                    textView.setText(suggestions[suggestionIndex]);
9133                    SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9134                    suggestionInfo.spanStart = spanStart;
9135                    suggestionInfo.spanEnd = spanEnd;
9136                    suggestionInfo.suggestionSpan = suggestionSpan;
9137                    suggestionInfo.suggestionIndex = suggestionIndex;
9138
9139                    totalNbSuggestions++;
9140                    if (totalNbSuggestions == MAX_NUMBER_SUGGESTIONS) {
9141                        // Also end outer for loop
9142                        spanIndex = nbSpans;
9143                        break;
9144                    }
9145                }
9146            }
9147
9148            if (totalNbSuggestions == 0) {
9149                // TODO Replace by final text, use a dedicated layout, add a fade out timer...
9150                TextView textView = (TextView) mContentView.getChildAt(0);
9151                textView.setText("No suggestions available");
9152                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9153                suggestionInfo.spanStart = NO_SUGGESTIONS;
9154                totalNbSuggestions++;
9155            } else {
9156                if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9157                ((Editable) mText).setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9158                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9159
9160                for (int i = 0; i < totalNbSuggestions; i++) {
9161                    final TextView textView = (TextView) mContentView.getChildAt(i);
9162                    highlightTextDifferences(textView, spanUnionStart, spanUnionEnd);
9163                }
9164            }
9165
9166            for (int i = 0; i < totalNbSuggestions; i++) {
9167                mContentView.getChildAt(i).setVisibility(VISIBLE);
9168            }
9169            for (int i = totalNbSuggestions; i < MAX_NUMBER_SUGGESTIONS; i++) {
9170                mContentView.getChildAt(i).setVisibility(GONE);
9171            }
9172        }
9173
9174        private long[] getWordLimits(CharSequence text) {
9175            // TODO locale for mSuggestionWordIterator
9176            if (mSuggestionWordIterator == null) mSuggestionWordIterator = new WordIterator();
9177            mSuggestionWordIterator.setCharSequence(text);
9178
9179            // First pass will simply count the number of words to be able to create an array
9180            // Not too expensive since previous break positions are cached by the BreakIterator
9181            int nbWords = 0;
9182            int position = mSuggestionWordIterator.following(0);
9183            while (position != BreakIterator.DONE) {
9184                nbWords++;
9185                position = mSuggestionWordIterator.following(position);
9186            }
9187
9188            int index = 0;
9189            long[] result = new long[nbWords];
9190
9191            position = mSuggestionWordIterator.following(0);
9192            while (position != BreakIterator.DONE) {
9193                int wordStart = mSuggestionWordIterator.getBeginning(position);
9194                result[index++] = packRangeInLong(wordStart, position);
9195                position = mSuggestionWordIterator.following(position);
9196            }
9197
9198            return result;
9199        }
9200
9201        private TextAppearanceSpan highlightSpan(int index) {
9202            final int length = mHighlightSpans.length;
9203            if (index < length) {
9204                return mHighlightSpans[index];
9205            }
9206
9207            // Assumes indexes are requested in sequence: simply append one more item
9208            TextAppearanceSpan[] newArray = new TextAppearanceSpan[length + 1];
9209            System.arraycopy(mHighlightSpans, 0, newArray, 0, length);
9210            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9211                    android.R.style.TextAppearance_SuggestionHighlight);
9212            newArray[length] = highlightSpan;
9213            mHighlightSpans = newArray;
9214            return highlightSpan;
9215        }
9216
9217        private void highlightTextDifferences(TextView textView, int unionStart, int unionEnd) {
9218            SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9219            final int spanStart = suggestionInfo.spanStart;
9220            final int spanEnd = suggestionInfo.spanEnd;
9221
9222            // Remove all text formating by converting to Strings
9223            final String text = textView.getText().toString();
9224            final String sourceText = mText.subSequence(spanStart, spanEnd).toString();
9225
9226            long[] sourceWordLimits = getWordLimits(sourceText);
9227            long[] wordLimits = getWordLimits(text);
9228
9229            SpannableStringBuilder ssb = new SpannableStringBuilder();
9230            // span [spanStart, spanEnd] is included in union [spanUnionStart, int spanUnionEnd]
9231            // The final result is made of 3 parts: the text before, between and after the span
9232            // This is the text before, provided for context
9233            ssb.append(mText.subSequence(unionStart, spanStart).toString());
9234
9235            // shift is used to offset spans positions wrt span's beginning
9236            final int shift = spanStart - unionStart;
9237            suggestionInfo.suggestionStart = shift;
9238            suggestionInfo.suggestionEnd = shift + text.length();
9239
9240            // This is the actual suggestion text, which will be highlighted by the following code
9241            ssb.append(text);
9242
9243            String[] words = new String[wordLimits.length];
9244            for (int i = 0; i < wordLimits.length; i++) {
9245                int wordStart = extractRangeStartFromLong(wordLimits[i]);
9246                int wordEnd = extractRangeEndFromLong(wordLimits[i]);
9247                words[i] = text.substring(wordStart, wordEnd);
9248            }
9249
9250            // Highlighted word algorithm is based on word matching between source and text
9251            // Matching words are found from left to right. TODO: change for RTL languages
9252            // Characters between matching words are highlighted
9253            int previousCommonWordIndex = -1;
9254            int nbHighlightSpans = 0;
9255            for (int i = 0; i < sourceWordLimits.length; i++) {
9256                int wordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9257                int wordEnd = extractRangeEndFromLong(sourceWordLimits[i]);
9258                String sourceWord = sourceText.substring(wordStart, wordEnd);
9259
9260                for (int j = previousCommonWordIndex + 1; j < words.length; j++) {
9261                    if (sourceWord.equals(words[j])) {
9262                        if (j != previousCommonWordIndex + 1) {
9263                            int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9264                                extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9265                            int lastDifferentPosition = extractRangeStartFromLong(wordLimits[j]);
9266                            ssb.setSpan(highlightSpan(nbHighlightSpans++),
9267                                    shift + firstDifferentPosition, shift + lastDifferentPosition,
9268                                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9269                        } else {
9270                            // Compare characters between words
9271                            int previousSourceWordEnd = i == 0 ? 0 :
9272                                extractRangeEndFromLong(sourceWordLimits[i - 1]);
9273                            int sourceWordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9274                            String sourceSpaces = sourceText.substring(previousSourceWordEnd,
9275                                    sourceWordStart);
9276
9277                            int previousWordEnd = j == 0 ? 0 :
9278                                extractRangeEndFromLong(wordLimits[j - 1]);
9279                            int currentWordStart = extractRangeStartFromLong(wordLimits[j]);
9280                            String textSpaces = text.substring(previousWordEnd, currentWordStart);
9281
9282                            if (!sourceSpaces.equals(textSpaces)) {
9283                                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9284                                        shift + previousWordEnd, shift + currentWordStart,
9285                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9286                            }
9287                        }
9288                        previousCommonWordIndex = j;
9289                        break;
9290                    }
9291                }
9292            }
9293
9294            // Finally, compare ends of Strings
9295            if (previousCommonWordIndex < words.length - 1) {
9296                int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9297                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9298                int lastDifferentPosition = textView.length();
9299                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9300                        shift + firstDifferentPosition, shift + lastDifferentPosition,
9301                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9302            } else {
9303                int lastSourceWordEnd = sourceWordLimits.length == 0 ? 0 :
9304                    extractRangeEndFromLong(sourceWordLimits[sourceWordLimits.length - 1]);
9305                String sourceSpaces = sourceText.substring(lastSourceWordEnd, sourceText.length());
9306
9307                int lastCommonTextWordEnd = previousCommonWordIndex < 0 ? 0 :
9308                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9309                String textSpaces = text.substring(lastCommonTextWordEnd, textView.length());
9310
9311                if (!sourceSpaces.equals(textSpaces) && textSpaces.length() > 0) {
9312                    ssb.setSpan(highlightSpan(nbHighlightSpans++),
9313                            shift + lastCommonTextWordEnd, shift + textView.length(),
9314                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9315                }
9316            }
9317
9318            // Final part, text after the current suggestion range.
9319            ssb.append(mText.subSequence(spanEnd, unionEnd).toString());
9320            textView.setText(ssb);
9321        }
9322
9323        @Override
9324        public void onClick(View view) {
9325            if (view instanceof TextView) {
9326                TextView textView = (TextView) view;
9327                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9328                final int spanStart = suggestionInfo.spanStart;
9329                final int spanEnd = suggestionInfo.spanEnd;
9330                if (spanStart != NO_SUGGESTIONS) {
9331                    // SuggestionSpans are removed by replace: save them before
9332                    Editable editable = ((Editable) mText);
9333                    SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9334                            SuggestionSpan.class);
9335                    final int length = suggestionSpans.length;
9336                    int[] suggestionSpansStarts = new int[length];
9337                    int[] suggestionSpansEnds = new int[length];
9338                    int[] suggestionSpansFlags = new int[length];
9339                    for (int i = 0; i < length; i++) {
9340                        final SuggestionSpan suggestionSpan = suggestionSpans[i];
9341                        suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9342                        suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9343                        suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9344                    }
9345
9346                    final int suggestionStart = suggestionInfo.suggestionStart;
9347                    final int suggestionEnd = suggestionInfo.suggestionEnd;
9348                    final String suggestion = textView.getText().subSequence(
9349                            suggestionStart, suggestionEnd).toString();
9350                    final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9351                    ((Editable) mText).replace(spanStart, spanEnd, suggestion);
9352
9353                    // Notify source IME of the suggestion pick. Do this before swaping texts.
9354                    if (!TextUtils.isEmpty(
9355                            suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9356                        InputMethodManager imm = InputMethodManager.peekInstance();
9357                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9358                                suggestionInfo.suggestionIndex);
9359                    }
9360
9361                    // Swap text content between actual text and Suggestion span
9362                    String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9363                    suggestions[suggestionInfo.suggestionIndex] = originalText;
9364
9365                    // Restore previous SuggestionSpans
9366                    final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9367                    for (int i = 0; i < length; i++) {
9368                        // Only spans that include the modified region make sense after replacement
9369                        // Spans partially included in the replaced region are removed, there is no
9370                        // way to assign them a valid range after replacement
9371                        if (suggestionSpansStarts[i] <= spanStart &&
9372                                suggestionSpansEnds[i] >= spanEnd) {
9373                            editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9374                                    suggestionSpansEnds[i] + lengthDifference,
9375                                    suggestionSpansFlags[i]);
9376                        }
9377                    }
9378                }
9379            }
9380            hide();
9381        }
9382    }
9383
9384    void showSuggestions() {
9385        if (!mSuggestionsEnabled || !isTextEditable()) return;
9386
9387        if (mSuggestionsPopupWindow == null) {
9388            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9389        }
9390        hideControllers();
9391        mSuggestionsPopupWindow.show();
9392    }
9393
9394    void hideSuggestions() {
9395        if (mSuggestionsPopupWindow != null) {
9396            mSuggestionsPopupWindow.hide();
9397        }
9398    }
9399
9400    boolean areSuggestionsShown() {
9401        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
9402    }
9403
9404    /**
9405     * Some parts of the text can have alternate suggestion text attached. This is typically done by
9406     * the IME by adding {@link SuggestionSpan}s to the text.
9407     *
9408     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9409     * user double taps on these parts of the text. No suggestions are displayed when this value is
9410     * false. Use {@link #setSuggestionsEnabled(boolean)} to change this value.
9411     *
9412     * @return true if the suggestions popup window is enabled.
9413     *
9414     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9415     */
9416    public boolean isSuggestionsEnabled() {
9417        return mSuggestionsEnabled;
9418    }
9419
9420    /**
9421     * Enables or disables the suggestion popup. See {@link #isSuggestionsEnabled()}.
9422     *
9423     * @param enabled Whether or not suggestions are enabled.
9424     */
9425    public void setSuggestionsEnabled(boolean enabled) {
9426        mSuggestionsEnabled = enabled;
9427    }
9428
9429    /**
9430     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9431     * selection is initiated in this View.
9432     *
9433     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
9434     * Paste actions, depending on what this View supports.
9435     *
9436     * A custom implementation can add new entries in the default menu in its
9437     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
9438     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
9439     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
9440     * or {@link android.R.id#paste} ids as parameters.
9441     *
9442     * Returning false from
9443     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
9444     * the action mode from being started.
9445     *
9446     * Action click events should be handled by the custom implementation of
9447     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
9448     *
9449     * Note that text selection mode is not started when a TextView receives focus and the
9450     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9451     * that case, to allow for quick replacement.
9452     */
9453    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9454        mCustomSelectionActionModeCallback = actionModeCallback;
9455    }
9456
9457    /**
9458     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9459     *
9460     * @return The current custom selection callback.
9461     */
9462    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9463        return mCustomSelectionActionModeCallback;
9464    }
9465
9466    /**
9467     *
9468     * @return true if the selection mode was actually started.
9469     */
9470    private boolean startSelectionActionMode() {
9471        if (mSelectionActionMode != null) {
9472            // Selection action mode is already started
9473            return false;
9474        }
9475
9476        if (!canSelectText() || !requestFocus()) {
9477            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
9478            return false;
9479        }
9480
9481        if (!hasSelection()) {
9482            // There may already be a selection on device rotation
9483            boolean currentWordSelected = selectCurrentWord();
9484            if (!currentWordSelected) {
9485                // No word found under cursor or text selection not permitted.
9486                return false;
9487            }
9488        }
9489
9490        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
9491        mSelectionActionMode = startActionMode(actionModeCallback);
9492        final boolean selectionStarted = mSelectionActionMode != null;
9493
9494        if (selectionStarted && !mTextIsSelectable) {
9495            // Show the IME to be able to replace text, except when selecting non editable text.
9496            final InputMethodManager imm = InputMethodManager.peekInstance();
9497            if (imm != null) imm.showSoftInput(this, 0, null);
9498        }
9499
9500        return selectionStarted;
9501    }
9502
9503    private void stopSelectionActionMode() {
9504        if (mSelectionActionMode != null) {
9505            // This will hide the mSelectionModifierCursorController
9506            mSelectionActionMode.finish();
9507        }
9508    }
9509
9510    /**
9511     * Paste clipboard content between min and max positions.
9512     */
9513    private void paste(int min, int max) {
9514        ClipboardManager clipboard =
9515            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9516        ClipData clip = clipboard.getPrimaryClip();
9517        if (clip != null) {
9518            boolean didFirst = false;
9519            for (int i=0; i<clip.getItemCount(); i++) {
9520                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
9521                if (paste != null) {
9522                    if (!didFirst) {
9523                        long minMax = prepareSpacesAroundPaste(min, max, paste);
9524                        min = extractRangeStartFromLong(minMax);
9525                        max = extractRangeEndFromLong(minMax);
9526                        Selection.setSelection((Spannable) mText, max);
9527                        ((Editable) mText).replace(min, max, paste);
9528                        didFirst = true;
9529                    } else {
9530                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9531                        ((Editable) mText).insert(getSelectionEnd(), paste);
9532                    }
9533                }
9534            }
9535            stopSelectionActionMode();
9536            sLastCutOrCopyTime = 0;
9537        }
9538    }
9539
9540    private void setPrimaryClip(ClipData clip) {
9541        ClipboardManager clipboard = (ClipboardManager) getContext().
9542                getSystemService(Context.CLIPBOARD_SERVICE);
9543        clipboard.setPrimaryClip(clip);
9544        sLastCutOrCopyTime = SystemClock.uptimeMillis();
9545    }
9546
9547    /**
9548     * An ActionMode Callback class that is used to provide actions while in text selection mode.
9549     *
9550     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
9551     * on which of these this TextView supports.
9552     */
9553    private class SelectionActionModeCallback implements ActionMode.Callback {
9554
9555        @Override
9556        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
9557            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
9558
9559            boolean allowText = getContext().getResources().getBoolean(
9560                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
9561
9562            mode.setTitle(allowText ?
9563                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
9564            mode.setSubtitle(null);
9565
9566            int selectAllIconId = 0; // No icon by default
9567            if (!allowText) {
9568                // Provide an icon, text will not be displayed on smaller screens.
9569                selectAllIconId = styledAttributes.getResourceId(
9570                        R.styleable.Theme_actionModeSelectAllDrawable, 0);
9571            }
9572
9573            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
9574                    setIcon(selectAllIconId).
9575                    setAlphabeticShortcut('a').
9576                    setShowAsAction(
9577                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9578
9579            if (canCut()) {
9580                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
9581                    setIcon(styledAttributes.getResourceId(
9582                            R.styleable.Theme_actionModeCutDrawable, 0)).
9583                    setAlphabeticShortcut('x').
9584                    setShowAsAction(
9585                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9586            }
9587
9588            if (canCopy()) {
9589                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
9590                    setIcon(styledAttributes.getResourceId(
9591                            R.styleable.Theme_actionModeCopyDrawable, 0)).
9592                    setAlphabeticShortcut('c').
9593                    setShowAsAction(
9594                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9595            }
9596
9597            if (canPaste()) {
9598                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
9599                        setIcon(styledAttributes.getResourceId(
9600                                R.styleable.Theme_actionModePasteDrawable, 0)).
9601                        setAlphabeticShortcut('v').
9602                        setShowAsAction(
9603                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9604            }
9605
9606            styledAttributes.recycle();
9607
9608            if (mCustomSelectionActionModeCallback != null) {
9609                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
9610                    // The custom mode can choose to cancel the action mode
9611                    return false;
9612                }
9613            }
9614
9615            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
9616                getSelectionController().show();
9617                return true;
9618            } else {
9619                return false;
9620            }
9621        }
9622
9623        @Override
9624        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
9625            if (mCustomSelectionActionModeCallback != null) {
9626                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
9627            }
9628            return true;
9629        }
9630
9631        @Override
9632        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
9633            if (mCustomSelectionActionModeCallback != null &&
9634                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
9635                return true;
9636            }
9637            return onTextContextMenuItem(item.getItemId());
9638        }
9639
9640        @Override
9641        public void onDestroyActionMode(ActionMode mode) {
9642            if (mCustomSelectionActionModeCallback != null) {
9643                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
9644            }
9645            Selection.setSelection((Spannable) mText, getSelectionEnd());
9646
9647            if (mSelectionModifierCursorController != null) {
9648                mSelectionModifierCursorController.hide();
9649            }
9650
9651            mSelectionActionMode = null;
9652        }
9653    }
9654
9655    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
9656        private static final int POPUP_TEXT_LAYOUT =
9657                com.android.internal.R.layout.text_edit_action_popup_text;
9658        private TextView mPasteTextView;
9659        private TextView mReplaceTextView;
9660
9661        @Override
9662        protected void createPopupWindow() {
9663            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9664                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9665            mPopupWindow.setClippingEnabled(true);
9666        }
9667
9668        @Override
9669        protected void initContentView() {
9670            mContentView.setOrientation(LinearLayout.HORIZONTAL);
9671            mContentView.setBackgroundResource(
9672                    com.android.internal.R.drawable.text_edit_side_paste_window);
9673
9674            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9675                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9676
9677            LayoutParams wrapContent = new LayoutParams(
9678                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
9679
9680            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9681            mPasteTextView.setLayoutParams(wrapContent);
9682            mContentView.addView(mPasteTextView);
9683            mPasteTextView.setText(com.android.internal.R.string.paste);
9684            mPasteTextView.setOnClickListener(this);
9685
9686            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9687            mReplaceTextView.setLayoutParams(wrapContent);
9688            mContentView.addView(mReplaceTextView);
9689            mReplaceTextView.setText(com.android.internal.R.string.replace);
9690            mReplaceTextView.setOnClickListener(this);
9691        }
9692
9693        @Override
9694        public void show() {
9695            mPasteTextView.setVisibility(canPaste() ? View.VISIBLE : View.GONE);
9696            super.show();
9697        }
9698
9699        @Override
9700        public void onClick(View view) {
9701            if (view == mPasteTextView && canPaste()) {
9702                onTextContextMenuItem(ID_PASTE);
9703                hide();
9704            } else if (view == mReplaceTextView) {
9705                showSuggestions();
9706            }
9707        }
9708
9709        @Override
9710        protected int getTextOffset() {
9711            return (getSelectionStart() + getSelectionEnd()) / 2;
9712        }
9713
9714        @Override
9715        protected int getVerticalLocalPosition(int line) {
9716            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
9717        }
9718
9719        @Override
9720        protected int clipVertically(int positionY) {
9721            if (positionY < 0) {
9722                final int offset = getTextOffset();
9723                final int line = mLayout.getLineForOffset(offset);
9724                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
9725                positionY += mContentView.getMeasuredHeight();
9726
9727                // Assumes insertion and selection handles share the same height
9728                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
9729                positionY += handle.getIntrinsicHeight();
9730            }
9731
9732            return positionY;
9733        }
9734    }
9735
9736    private abstract class HandleView extends View implements TextViewPositionListener {
9737        protected Drawable mDrawable;
9738        private final PopupWindow mContainer;
9739        // Position with respect to the parent TextView
9740        private int mPositionX, mPositionY;
9741        private boolean mIsDragging;
9742        // Offset from touch position to mPosition
9743        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
9744        protected int mHotspotX;
9745        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
9746        private float mTouchOffsetY;
9747        // Where the touch position should be on the handle to ensure a maximum cursor visibility
9748        private float mIdealVerticalOffset;
9749        // Parent's (TextView) previous position in window
9750        private int mLastParentX, mLastParentY;
9751        // Transient action popup window for Paste and Replace actions
9752        protected ActionPopupWindow mActionPopupWindow;
9753        // Previous text character offset
9754        private int mPreviousOffset = -1;
9755        // Previous text character offset
9756        private boolean mPositionHasChanged = true;
9757        // Used to delay the appearance of the action popup window
9758        private Runnable mActionPopupShower;
9759
9760        public HandleView() {
9761            super(TextView.this.mContext);
9762            mContainer = new PopupWindow(TextView.this.mContext, null,
9763                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9764            mContainer.setSplitTouchEnabled(true);
9765            mContainer.setClippingEnabled(false);
9766            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9767            mContainer.setContentView(this);
9768
9769            initDrawable();
9770
9771            final int handleHeight = mDrawable.getIntrinsicHeight();
9772            mTouchOffsetY = -0.3f * handleHeight;
9773            mIdealVerticalOffset = 0.7f * handleHeight;
9774        }
9775
9776        protected abstract void initDrawable();
9777
9778        // Touch-up filter: number of previous positions remembered
9779        private static final int HISTORY_SIZE = 5;
9780        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
9781        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
9782        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
9783        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
9784        private int mPreviousOffsetIndex = 0;
9785        private int mNumberPreviousOffsets = 0;
9786
9787        private void startTouchUpFilter(int offset) {
9788            mNumberPreviousOffsets = 0;
9789            addPositionToTouchUpFilter(offset);
9790        }
9791
9792        private void addPositionToTouchUpFilter(int offset) {
9793            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
9794            mPreviousOffsets[mPreviousOffsetIndex] = offset;
9795            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
9796            mNumberPreviousOffsets++;
9797        }
9798
9799        private void filterOnTouchUp() {
9800            final long now = SystemClock.uptimeMillis();
9801            int i = 0;
9802            int index = mPreviousOffsetIndex;
9803            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
9804            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
9805                i++;
9806                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
9807            }
9808
9809            if (i > 0 && i < iMax &&
9810                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
9811                positionAtCursorOffset(mPreviousOffsets[index]);
9812            }
9813        }
9814
9815        public boolean offsetHasBeenChanged() {
9816            return mNumberPreviousOffsets > 1;
9817        }
9818
9819        @Override
9820        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
9821            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
9822        }
9823
9824        public void show() {
9825            if (isShowing()) return;
9826
9827            getPositionListener().addSubscriber(this, true);
9828
9829            // Make sure the offset is always considered new, even when focusing at same position
9830            mPreviousOffset = -1;
9831            positionAtCursorOffset(getCurrentCursorOffset());
9832
9833            hideActionPopupWindow();
9834        }
9835
9836        protected void dismiss() {
9837            mIsDragging = false;
9838            mContainer.dismiss();
9839            onDetached();
9840        }
9841
9842        public void hide() {
9843            dismiss();
9844
9845            TextView.this.getPositionListener().removeSubscriber(this);
9846        }
9847
9848        void showActionPopupWindow(int delay) {
9849            if (mActionPopupWindow == null) {
9850                mActionPopupWindow = new ActionPopupWindow();
9851            }
9852            if (mActionPopupShower == null) {
9853                mActionPopupShower = new Runnable() {
9854                    public void run() {
9855                        mActionPopupWindow.show();
9856                    }
9857                };
9858            } else {
9859                TextView.this.removeCallbacks(mActionPopupShower);
9860            }
9861            TextView.this.postDelayed(mActionPopupShower, delay);
9862        }
9863
9864        protected void hideActionPopupWindow() {
9865            if (mActionPopupShower != null) {
9866                TextView.this.removeCallbacks(mActionPopupShower);
9867            }
9868            if (mActionPopupWindow != null) {
9869                mActionPopupWindow.hide();
9870            }
9871        }
9872
9873        public boolean isShowing() {
9874            return mContainer.isShowing();
9875        }
9876
9877        private boolean isVisible() {
9878            // Always show a dragging handle.
9879            if (mIsDragging) {
9880                return true;
9881            }
9882
9883            if (isInBatchEditMode()) {
9884                return false;
9885            }
9886
9887            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
9888        }
9889
9890        public abstract int getCurrentCursorOffset();
9891
9892        public abstract void updateSelection(int offset);
9893
9894        public abstract void updatePosition(float x, float y);
9895
9896        protected void positionAtCursorOffset(int offset) {
9897            // A HandleView relies on the layout, which may be nulled by external methods
9898            if (mLayout == null) {
9899                // Will update controllers' state, hiding them and stopping selection mode if needed
9900                prepareCursorControllers();
9901                return;
9902            }
9903
9904            if (offset != mPreviousOffset) {
9905                updateSelection(offset);
9906                addPositionToTouchUpFilter(offset);
9907                final int line = mLayout.getLineForOffset(offset);
9908
9909                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
9910                mPositionY = mLayout.getLineBottom(line);
9911
9912                // Take TextView's padding into account.
9913                mPositionX += viewportToContentHorizontalOffset();
9914                mPositionY += viewportToContentVerticalOffset();
9915
9916                mPreviousOffset = offset;
9917                mPositionHasChanged = true;
9918            }
9919        }
9920
9921        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
9922            if (modified || mPositionHasChanged) {
9923                if (mIsDragging) {
9924                    // Update touchToWindow offset in case of parent scrolling while dragging
9925                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
9926                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
9927                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
9928                        mLastParentX = parentPositionX;
9929                        mLastParentY = parentPositionY;
9930                    }
9931
9932                    onHandleMoved();
9933                }
9934
9935                if (isVisible()) {
9936                    final int positionX = parentPositionX + mPositionX;
9937                    final int positionY = parentPositionY + mPositionY;
9938                    if (isShowing()) {
9939                        mContainer.update(positionX, positionY, -1, -1);
9940                    } else {
9941                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9942                                positionX, positionY);
9943                    }
9944                } else {
9945                    if (isShowing()) {
9946                        dismiss();
9947                    }
9948                }
9949
9950                mPositionHasChanged = false;
9951            }
9952        }
9953
9954        @Override
9955        protected void onDraw(Canvas c) {
9956            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
9957            mDrawable.draw(c);
9958        }
9959
9960        @Override
9961        public boolean onTouchEvent(MotionEvent ev) {
9962            switch (ev.getActionMasked()) {
9963                case MotionEvent.ACTION_DOWN: {
9964                    startTouchUpFilter(getCurrentCursorOffset());
9965                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
9966                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
9967
9968                    final PositionListener positionListener = getPositionListener();
9969                    mLastParentX = positionListener.getPositionX();
9970                    mLastParentY = positionListener.getPositionY();
9971                    mIsDragging = true;
9972                    break;
9973                }
9974
9975                case MotionEvent.ACTION_MOVE: {
9976                    final float rawX = ev.getRawX();
9977                    final float rawY = ev.getRawY();
9978
9979                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
9980                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
9981                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
9982                    float newVerticalOffset;
9983                    if (previousVerticalOffset < mIdealVerticalOffset) {
9984                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
9985                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
9986                    } else {
9987                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
9988                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
9989                    }
9990                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
9991
9992                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
9993                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
9994
9995                    updatePosition(newPosX, newPosY);
9996                    break;
9997                }
9998
9999                case MotionEvent.ACTION_UP:
10000                    filterOnTouchUp();
10001                    mIsDragging = false;
10002                    break;
10003
10004                case MotionEvent.ACTION_CANCEL:
10005                    mIsDragging = false;
10006                    break;
10007            }
10008            return true;
10009        }
10010
10011        public boolean isDragging() {
10012            return mIsDragging;
10013        }
10014
10015        void onHandleMoved() {
10016            hideActionPopupWindow();
10017        }
10018
10019        public void onDetached() {
10020            hideActionPopupWindow();
10021        }
10022    }
10023
10024    private class InsertionHandleView extends HandleView {
10025        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10026        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10027
10028        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10029        private float mDownPositionX, mDownPositionY;
10030        private Runnable mHider;
10031
10032        @Override
10033        public void show() {
10034            super.show();
10035            hideAfterDelay();
10036        }
10037
10038        public void show(int delayBeforeShowActionPopup) {
10039            show();
10040
10041            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10042            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10043                delayBeforeShowActionPopup = 0;
10044            }
10045            showActionPopupWindow(delayBeforeShowActionPopup);
10046        }
10047
10048        private void hideAfterDelay() {
10049            removeHiderCallback();
10050            if (mHider == null) {
10051                mHider = new Runnable() {
10052                    public void run() {
10053                        hide();
10054                    }
10055                };
10056            }
10057            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10058        }
10059
10060        private void removeHiderCallback() {
10061            if (mHider != null) {
10062                TextView.this.removeCallbacks(mHider);
10063            }
10064        }
10065
10066        @Override
10067        protected void initDrawable() {
10068            if (mSelectHandleCenter == null) {
10069                mSelectHandleCenter = mContext.getResources().getDrawable(
10070                        mTextSelectHandleRes);
10071            }
10072            mDrawable = mSelectHandleCenter;
10073            mHotspotX = mDrawable.getIntrinsicWidth() / 2;
10074        }
10075
10076        @Override
10077        public boolean onTouchEvent(MotionEvent ev) {
10078            final boolean result = super.onTouchEvent(ev);
10079
10080            switch (ev.getActionMasked()) {
10081                case MotionEvent.ACTION_DOWN:
10082                    mDownPositionX = ev.getRawX();
10083                    mDownPositionY = ev.getRawY();
10084                    break;
10085
10086                case MotionEvent.ACTION_UP:
10087                    if (!offsetHasBeenChanged()) {
10088                        final float deltaX = mDownPositionX - ev.getRawX();
10089                        final float deltaY = mDownPositionY - ev.getRawY();
10090                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10091                        if (distanceSquared < mSquaredTouchSlopDistance) {
10092                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10093                                // Tapping on the handle dismisses the displayed action popup
10094                                mActionPopupWindow.hide();
10095                            } else {
10096                                show(0);
10097                            }
10098                        }
10099                    }
10100                    hideAfterDelay();
10101                    break;
10102
10103                case MotionEvent.ACTION_CANCEL:
10104                    hideAfterDelay();
10105                    break;
10106
10107                default:
10108                    break;
10109            }
10110
10111            return result;
10112        }
10113
10114        @Override
10115        public int getCurrentCursorOffset() {
10116            return TextView.this.getSelectionStart();
10117        }
10118
10119        @Override
10120        public void updateSelection(int offset) {
10121            Selection.setSelection((Spannable) mText, offset);
10122        }
10123
10124        @Override
10125        public void updatePosition(float x, float y) {
10126            positionAtCursorOffset(getOffsetForPosition(x, y));
10127        }
10128
10129        @Override
10130        void onHandleMoved() {
10131            super.onHandleMoved();
10132            removeHiderCallback();
10133        }
10134
10135        @Override
10136        public void onDetached() {
10137            super.onDetached();
10138            removeHiderCallback();
10139        }
10140    }
10141
10142    private class SelectionStartHandleView extends HandleView {
10143        @Override
10144        protected void initDrawable() {
10145            if (mSelectHandleLeft == null) {
10146                mSelectHandleLeft = mContext.getResources().getDrawable(
10147                        mTextSelectHandleLeftRes);
10148            }
10149            mDrawable = mSelectHandleLeft;
10150            mHotspotX = (mDrawable.getIntrinsicWidth() * 3) / 4;
10151        }
10152
10153        @Override
10154        public int getCurrentCursorOffset() {
10155            return TextView.this.getSelectionStart();
10156        }
10157
10158        @Override
10159        public void updateSelection(int offset) {
10160            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10161        }
10162
10163        @Override
10164        public void updatePosition(float x, float y) {
10165            final int selectionStart = getSelectionStart();
10166            final int selectionEnd = getSelectionEnd();
10167
10168            int offset = getOffsetForPosition(x, y);
10169
10170            // No need to redraw when the offset is unchanged
10171            if (offset == selectionStart) return;
10172            // Handles can not cross and selection is at least one character
10173            if (offset >= selectionEnd) offset = selectionEnd - 1;
10174
10175            positionAtCursorOffset(offset);
10176        }
10177
10178        public ActionPopupWindow getActionPopupWindow() {
10179            return mActionPopupWindow;
10180        }
10181    }
10182
10183    private class SelectionEndHandleView extends HandleView {
10184        @Override
10185        protected void initDrawable() {
10186            if (mSelectHandleRight == null) {
10187                mSelectHandleRight = mContext.getResources().getDrawable(
10188                        mTextSelectHandleRightRes);
10189            }
10190            mDrawable = mSelectHandleRight;
10191            mHotspotX = mDrawable.getIntrinsicWidth() / 4;
10192        }
10193
10194        @Override
10195        public int getCurrentCursorOffset() {
10196            return TextView.this.getSelectionEnd();
10197        }
10198
10199        @Override
10200        public void updateSelection(int offset) {
10201            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10202        }
10203
10204        @Override
10205        public void updatePosition(float x, float y) {
10206            final int selectionStart = getSelectionStart();
10207            final int selectionEnd = getSelectionEnd();
10208
10209            int offset = getOffsetForPosition(x, y);
10210
10211            // No need to redraw when the offset is unchanged
10212            if (offset == selectionEnd) return;
10213            // Handles can not cross and selection is at least one character
10214            if (offset <= selectionStart) offset = selectionStart + 1;
10215
10216            positionAtCursorOffset(offset);
10217        }
10218
10219        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10220            mActionPopupWindow = actionPopupWindow;
10221        }
10222    }
10223
10224    /**
10225     * A CursorController instance can be used to control a cursor in the text.
10226     * It is not used outside of {@link TextView}.
10227     * @hide
10228     */
10229    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10230        /**
10231         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10232         * See also {@link #hide()}.
10233         */
10234        public void show();
10235
10236        /**
10237         * Hide the cursor controller from screen.
10238         * See also {@link #show()}.
10239         */
10240        public void hide();
10241
10242        /**
10243         * Called when the view is detached from window. Perform house keeping task, such as
10244         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10245         * preventing the activity from being recycled.
10246         */
10247        public void onDetached();
10248    }
10249
10250    private class InsertionPointCursorController implements CursorController {
10251        private static final int DELAY_BEFORE_PASTE_ACTION = 1600;
10252
10253        private InsertionHandleView mHandle;
10254
10255        public void show() {
10256            getHandle().show(DELAY_BEFORE_PASTE_ACTION);
10257        }
10258
10259        public void showImmediately() {
10260            getHandle().show(0);
10261        }
10262
10263        public void hide() {
10264            if (mHandle != null) {
10265                mHandle.hide();
10266            }
10267        }
10268
10269        public void onTouchModeChanged(boolean isInTouchMode) {
10270            if (!isInTouchMode) {
10271                hide();
10272            }
10273        }
10274
10275        private InsertionHandleView getHandle() {
10276            if (mHandle == null) {
10277                mHandle = new InsertionHandleView();
10278            }
10279            return mHandle;
10280        }
10281
10282        @Override
10283        public void onDetached() {
10284            final ViewTreeObserver observer = getViewTreeObserver();
10285            observer.removeOnTouchModeChangeListener(this);
10286
10287            if (mHandle != null) mHandle.onDetached();
10288        }
10289    }
10290
10291    private class SelectionModifierCursorController implements CursorController {
10292        private static final int DELAY_BEFORE_REPLACE_ACTION = 1200;
10293        // The cursor controller handles, lazily created when shown.
10294        private SelectionStartHandleView mStartHandle;
10295        private SelectionEndHandleView mEndHandle;
10296        // The offsets of that last touch down event. Remembered to start selection there.
10297        private int mMinTouchOffset, mMaxTouchOffset;
10298
10299        // Double tap detection
10300        private long mPreviousTapUpTime = 0;
10301        private float mPreviousTapPositionX, mPreviousTapPositionY;
10302
10303        SelectionModifierCursorController() {
10304            resetTouchOffsets();
10305        }
10306
10307        public void show() {
10308            if (isInBatchEditMode()) {
10309                return;
10310            }
10311
10312            // Lazy object creation has to be done before updatePosition() is called.
10313            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
10314            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
10315
10316            mStartHandle.show();
10317            mEndHandle.show();
10318
10319            // Make sure both left and right handles share the same ActionPopupWindow (so that
10320            // moving any of the handles hides the action popup).
10321            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
10322            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
10323
10324            hideInsertionPointCursorController();
10325            hideSuggestions();
10326        }
10327
10328        public void hide() {
10329            if (mStartHandle != null) mStartHandle.hide();
10330            if (mEndHandle != null) mEndHandle.hide();
10331        }
10332
10333        public void onTouchEvent(MotionEvent event) {
10334            // This is done even when the View does not have focus, so that long presses can start
10335            // selection and tap can move cursor from this tap position.
10336            switch (event.getActionMasked()) {
10337                case MotionEvent.ACTION_DOWN:
10338                    final float x = event.getX();
10339                    final float y = event.getY();
10340
10341                    // Remember finger down position, to be able to start selection from there
10342                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
10343
10344                    // Double tap detection
10345                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
10346                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
10347                            isPositionOnText(x, y)) {
10348                        final float deltaX = x - mPreviousTapPositionX;
10349                        final float deltaY = y - mPreviousTapPositionY;
10350                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10351                        if (distanceSquared < mSquaredTouchSlopDistance) {
10352                            startSelectionActionMode();
10353                            mDiscardNextActionUp = true;
10354                        }
10355                    }
10356
10357                    mPreviousTapPositionX = x;
10358                    mPreviousTapPositionY = y;
10359                    break;
10360
10361                case MotionEvent.ACTION_POINTER_DOWN:
10362                case MotionEvent.ACTION_POINTER_UP:
10363                    // Handle multi-point gestures. Keep min and max offset positions.
10364                    // Only activated for devices that correctly handle multi-touch.
10365                    if (mContext.getPackageManager().hasSystemFeature(
10366                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
10367                        updateMinAndMaxOffsets(event);
10368                    }
10369                    break;
10370
10371                case MotionEvent.ACTION_UP:
10372                    mPreviousTapUpTime = SystemClock.uptimeMillis();
10373                    break;
10374            }
10375        }
10376
10377        /**
10378         * @param event
10379         */
10380        private void updateMinAndMaxOffsets(MotionEvent event) {
10381            int pointerCount = event.getPointerCount();
10382            for (int index = 0; index < pointerCount; index++) {
10383                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
10384                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
10385                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
10386            }
10387        }
10388
10389        public int getMinTouchOffset() {
10390            return mMinTouchOffset;
10391        }
10392
10393        public int getMaxTouchOffset() {
10394            return mMaxTouchOffset;
10395        }
10396
10397        public void resetTouchOffsets() {
10398            mMinTouchOffset = mMaxTouchOffset = -1;
10399        }
10400
10401        /**
10402         * @return true iff this controller is currently used to move the selection start.
10403         */
10404        public boolean isSelectionStartDragged() {
10405            return mStartHandle != null && mStartHandle.isDragging();
10406        }
10407
10408        public void onTouchModeChanged(boolean isInTouchMode) {
10409            if (!isInTouchMode) {
10410                hide();
10411            }
10412        }
10413
10414        @Override
10415        public void onDetached() {
10416            final ViewTreeObserver observer = getViewTreeObserver();
10417            observer.removeOnTouchModeChangeListener(this);
10418
10419            if (mStartHandle != null) mStartHandle.onDetached();
10420            if (mEndHandle != null) mEndHandle.onDetached();
10421        }
10422    }
10423
10424    private void hideInsertionPointCursorController() {
10425        // No need to create the controller to hide it.
10426        if (mInsertionPointCursorController != null) {
10427            mInsertionPointCursorController.hide();
10428        }
10429    }
10430
10431    /**
10432     * Hides the insertion controller and stops text selection mode, hiding the selection controller
10433     */
10434    private void hideControllers() {
10435        hideInsertionPointCursorController();
10436        stopSelectionActionMode();
10437        hideSuggestions();
10438    }
10439
10440    /**
10441     * Get the character offset closest to the specified absolute position. A typical use case is to
10442     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
10443     *
10444     * @param x The horizontal absolute position of a point on screen
10445     * @param y The vertical absolute position of a point on screen
10446     * @return the character offset for the character whose position is closest to the specified
10447     *  position. Returns -1 if there is no layout.
10448     */
10449    public int getOffsetForPosition(float x, float y) {
10450        if (getLayout() == null) return -1;
10451        final int line = getLineAtCoordinate(y);
10452        final int offset = getOffsetAtCoordinate(line, x);
10453        return offset;
10454    }
10455
10456    private float convertToLocalHorizontalCoordinate(float x) {
10457        x -= getTotalPaddingLeft();
10458        // Clamp the position to inside of the view.
10459        x = Math.max(0.0f, x);
10460        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
10461        x += getScrollX();
10462        return x;
10463    }
10464
10465    private int getLineAtCoordinate(float y) {
10466        y -= getTotalPaddingTop();
10467        // Clamp the position to inside of the view.
10468        y = Math.max(0.0f, y);
10469        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
10470        y += getScrollY();
10471        return getLayout().getLineForVertical((int) y);
10472    }
10473
10474    private int getOffsetAtCoordinate(int line, float x) {
10475        x = convertToLocalHorizontalCoordinate(x);
10476        return getLayout().getOffsetForHorizontal(line, x);
10477    }
10478
10479    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
10480     * in the view. Returns false when the position is in the empty space of left/right of text.
10481     */
10482    private boolean isPositionOnText(float x, float y) {
10483        if (getLayout() == null) return false;
10484
10485        final int line = getLineAtCoordinate(y);
10486        x = convertToLocalHorizontalCoordinate(x);
10487
10488        if (x < getLayout().getLineLeft(line)) return false;
10489        if (x > getLayout().getLineRight(line)) return false;
10490        return true;
10491    }
10492
10493    @Override
10494    public boolean onDragEvent(DragEvent event) {
10495        switch (event.getAction()) {
10496            case DragEvent.ACTION_DRAG_STARTED:
10497                return hasInsertionController();
10498
10499            case DragEvent.ACTION_DRAG_ENTERED:
10500                TextView.this.requestFocus();
10501                return true;
10502
10503            case DragEvent.ACTION_DRAG_LOCATION:
10504                final int offset = getOffsetForPosition(event.getX(), event.getY());
10505                Selection.setSelection((Spannable)mText, offset);
10506                return true;
10507
10508            case DragEvent.ACTION_DROP:
10509                onDrop(event);
10510                return true;
10511
10512            case DragEvent.ACTION_DRAG_ENDED:
10513            case DragEvent.ACTION_DRAG_EXITED:
10514            default:
10515                return true;
10516        }
10517    }
10518
10519    private void onDrop(DragEvent event) {
10520        StringBuilder content = new StringBuilder("");
10521        ClipData clipData = event.getClipData();
10522        final int itemCount = clipData.getItemCount();
10523        for (int i=0; i < itemCount; i++) {
10524            Item item = clipData.getItemAt(i);
10525            content.append(item.coerceToText(TextView.this.mContext));
10526        }
10527
10528        final int offset = getOffsetForPosition(event.getX(), event.getY());
10529
10530        Object localState = event.getLocalState();
10531        DragLocalState dragLocalState = null;
10532        if (localState instanceof DragLocalState) {
10533            dragLocalState = (DragLocalState) localState;
10534        }
10535        boolean dragDropIntoItself = dragLocalState != null &&
10536                dragLocalState.sourceTextView == this;
10537
10538        if (dragDropIntoItself) {
10539            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
10540                // A drop inside the original selection discards the drop.
10541                return;
10542            }
10543        }
10544
10545        final int originalLength = mText.length();
10546        long minMax = prepareSpacesAroundPaste(offset, offset, content);
10547        int min = extractRangeStartFromLong(minMax);
10548        int max = extractRangeEndFromLong(minMax);
10549
10550        Selection.setSelection((Spannable) mText, max);
10551        ((Editable) mText).replace(min, max, content);
10552
10553        if (dragDropIntoItself) {
10554            int dragSourceStart = dragLocalState.start;
10555            int dragSourceEnd = dragLocalState.end;
10556            if (max <= dragSourceStart) {
10557                // Inserting text before selection has shifted positions
10558                final int shift = mText.length() - originalLength;
10559                dragSourceStart += shift;
10560                dragSourceEnd += shift;
10561            }
10562
10563            // Delete original selection
10564            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
10565
10566            // Make sure we do not leave two adjacent spaces.
10567            if ((dragSourceStart == 0 ||
10568                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
10569                    (dragSourceStart == mText.length() ||
10570                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
10571                final int pos = dragSourceStart == mText.length() ?
10572                        dragSourceStart - 1 : dragSourceStart;
10573                ((Editable) mText).delete(pos, pos + 1);
10574            }
10575        }
10576    }
10577
10578    /**
10579     * @return True if this view supports insertion handles.
10580     */
10581    boolean hasInsertionController() {
10582        return mInsertionControllerEnabled;
10583    }
10584
10585    /**
10586     * @return True if this view supports selection handles.
10587     */
10588    boolean hasSelectionController() {
10589        return mSelectionControllerEnabled;
10590    }
10591
10592    InsertionPointCursorController getInsertionController() {
10593        if (!mInsertionControllerEnabled) {
10594            return null;
10595        }
10596
10597        if (mInsertionPointCursorController == null) {
10598            mInsertionPointCursorController = new InsertionPointCursorController();
10599
10600            final ViewTreeObserver observer = getViewTreeObserver();
10601            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
10602        }
10603
10604        return mInsertionPointCursorController;
10605    }
10606
10607    SelectionModifierCursorController getSelectionController() {
10608        if (!mSelectionControllerEnabled) {
10609            return null;
10610        }
10611
10612        if (mSelectionModifierCursorController == null) {
10613            mSelectionModifierCursorController = new SelectionModifierCursorController();
10614
10615            final ViewTreeObserver observer = getViewTreeObserver();
10616            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
10617        }
10618
10619        return mSelectionModifierCursorController;
10620    }
10621
10622    boolean isInBatchEditMode() {
10623        final InputMethodState ims = mInputMethodState;
10624        if (ims != null) {
10625            return ims.mBatchEditNesting > 0;
10626        }
10627        return mInBatchEditControllers;
10628    }
10629
10630    private class TextViewDirectionHeuristic extends TextDirectionHeuristicImpl {
10631        private TextViewDirectionHeuristic(TextDirectionAlgorithm algorithm) {
10632            super(algorithm);
10633        }
10634        @Override
10635        protected boolean defaultIsRtl() {
10636            return getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL;
10637        }
10638    }
10639
10640    /**
10641     * Resolve the text direction.
10642     *
10643     * Text direction of paragraphs in a TextView is determined using a heuristic. If the correct
10644     * text direction cannot be determined by the heuristic, the view's resolved layout direction
10645     * determines the direction.
10646     *
10647     * This heuristic and result is applied individually to each paragraph in a TextView, based on
10648     * the text and style content of that paragraph. Paragraph text styles can also be used to force
10649     * a particular direction.
10650     */
10651    @Override
10652    protected void resolveTextDirection() {
10653        super.resolveTextDirection();
10654
10655        int textDir = getResolvedTextDirection();
10656        switch (textDir) {
10657            default:
10658            case TEXT_DIRECTION_FIRST_STRONG:
10659                mTextDir = new TextViewDirectionHeuristic(FirstStrong.INSTANCE);
10660                break;
10661            case TEXT_DIRECTION_ANY_RTL:
10662                mTextDir = new TextViewDirectionHeuristic(AnyStrong.INSTANCE_RTL);
10663                break;
10664            case TEXT_DIRECTION_CHAR_COUNT:
10665                mTextDir = new TextViewDirectionHeuristic(CharCount.INSTANCE_DEFAULT);
10666                break;
10667            case TEXT_DIRECTION_LTR:
10668                mTextDir = TextDirectionHeuristics.LTR;
10669                break;
10670            case TEXT_DIRECTION_RTL:
10671                mTextDir = TextDirectionHeuristics.RTL;
10672                break;
10673        }
10674
10675    }
10676
10677    /**
10678     * Subclasses will need to override this method to implement their own way of resolving
10679     * drawables depending on the layout direction.
10680     *
10681     * A call to the super method will be required from the subclasses implementation.
10682     *
10683     */
10684    protected void resolveDrawables() {
10685        // No need to resolve twice
10686        if (mResolvedDrawables) {
10687            return;
10688        }
10689        // No drawable to resolve
10690        if (mDrawables == null) {
10691            return;
10692        }
10693        // No relative drawable to resolve
10694        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
10695            mResolvedDrawables = true;
10696            return;
10697        }
10698
10699        Drawables dr = mDrawables;
10700        switch(getResolvedLayoutDirection()) {
10701            case LAYOUT_DIRECTION_RTL:
10702                if (dr.mDrawableStart != null) {
10703                    dr.mDrawableRight = dr.mDrawableStart;
10704
10705                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
10706                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
10707                }
10708                if (dr.mDrawableEnd != null) {
10709                    dr.mDrawableLeft = dr.mDrawableEnd;
10710
10711                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
10712                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
10713                }
10714                break;
10715
10716            case LAYOUT_DIRECTION_LTR:
10717            default:
10718                if (dr.mDrawableStart != null) {
10719                    dr.mDrawableLeft = dr.mDrawableStart;
10720
10721                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
10722                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
10723                }
10724                if (dr.mDrawableEnd != null) {
10725                    dr.mDrawableRight = dr.mDrawableEnd;
10726
10727                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
10728                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
10729                }
10730                break;
10731        }
10732        mResolvedDrawables = true;
10733    }
10734
10735    protected void resetResolvedDrawables() {
10736        mResolvedDrawables = false;
10737    }
10738
10739    @ViewDebug.ExportedProperty(category = "text")
10740    private CharSequence            mText;
10741    private CharSequence            mTransformed;
10742    private BufferType              mBufferType = BufferType.NORMAL;
10743
10744    private int                     mInputType = EditorInfo.TYPE_NULL;
10745    private CharSequence            mHint;
10746    private Layout                  mHintLayout;
10747
10748    private KeyListener             mInput;
10749
10750    private MovementMethod          mMovement;
10751    private TransformationMethod    mTransformation;
10752    private boolean                 mAllowTransformationLengthChange;
10753    private ChangeWatcher           mChangeWatcher;
10754
10755    private ArrayList<TextWatcher>  mListeners = null;
10756
10757    // display attributes
10758    private final TextPaint         mTextPaint;
10759    private boolean                 mUserSetTextScaleX;
10760    private final Paint             mHighlightPaint;
10761    private int                     mHighlightColor = 0xCC475925;
10762    /**
10763     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
10764     * this field being protected. Will be restored as private when lineHeight
10765     * feature request 3215097 is implemented
10766     * @hide
10767     */
10768    protected Layout                mLayout;
10769
10770    private long                    mShowCursor;
10771    private Blink                   mBlink;
10772    private boolean                 mCursorVisible = true;
10773
10774    // Cursor Controllers.
10775    private InsertionPointCursorController mInsertionPointCursorController;
10776    private SelectionModifierCursorController mSelectionModifierCursorController;
10777    private ActionMode              mSelectionActionMode;
10778    private boolean                 mInsertionControllerEnabled;
10779    private boolean                 mSelectionControllerEnabled;
10780    private boolean                 mInBatchEditControllers;
10781
10782    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
10783    // select from the current cursor position. Otherwise, select from long pressed position.
10784    private boolean                 mDPadCenterIsDown = false;
10785    private boolean                 mEnterKeyIsDown = false;
10786    private boolean                 mContextMenuTriggeredByKey = false;
10787
10788    private boolean                 mSelectAllOnFocus = false;
10789
10790    private int                     mGravity = Gravity.TOP | Gravity.START;
10791    private boolean                 mHorizontallyScrolling;
10792
10793    private int                     mAutoLinkMask;
10794    private boolean                 mLinksClickable = true;
10795
10796    private float                   mSpacingMult = 1;
10797    private float                   mSpacingAdd = 0;
10798    private boolean                 mTextIsSelectable = false;
10799
10800    private static final int        LINES = 1;
10801    private static final int        EMS = LINES;
10802    private static final int        PIXELS = 2;
10803
10804    private int                     mMaximum = Integer.MAX_VALUE;
10805    private int                     mMaxMode = LINES;
10806    private int                     mMinimum = 0;
10807    private int                     mMinMode = LINES;
10808
10809    private int                     mMaxWidth = Integer.MAX_VALUE;
10810    private int                     mMaxWidthMode = PIXELS;
10811    private int                     mMinWidth = 0;
10812    private int                     mMinWidthMode = PIXELS;
10813
10814    private boolean                 mSingleLine;
10815    private int                     mDesiredHeightAtMeasure = -1;
10816    private boolean                 mIncludePad = true;
10817
10818    // tmp primitives, so we don't alloc them on each draw
10819    private Path                    mHighlightPath;
10820    private boolean                 mHighlightPathBogus = true;
10821    private static final RectF      sTempRect = new RectF();
10822
10823    // XXX should be much larger
10824    private static final int        VERY_WIDE = 16384;
10825
10826    private static final int        BLINK = 500;
10827
10828    private static final int ANIMATED_SCROLL_GAP = 250;
10829    private long mLastScroll;
10830    private Scroller mScroller = null;
10831
10832    private BoringLayout.Metrics mBoring;
10833    private BoringLayout.Metrics mHintBoring;
10834
10835    private BoringLayout mSavedLayout, mSavedHintLayout;
10836
10837    private TextDirectionHeuristic mTextDir = null;
10838
10839    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
10840    private InputFilter[] mFilters = NO_FILTERS;
10841    private static final Spanned EMPTY_SPANNED = new SpannedString("");
10842    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
10843    // System wide time for last cut or copy action.
10844    private static long sLastCutOrCopyTime;
10845    // Used to highlight a word when it is corrected by the IME
10846    private CorrectionHighlighter mCorrectionHighlighter;
10847    // New state used to change background based on whether this TextView is multiline.
10848    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
10849}
10850