TextView.java revision 12ab64593f557674f783e39ab804a7cd033b0050 
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 com.android.internal.util.FastMath;
20import com.android.internal.widget.EditableInputConnection;
21
22import org.xmlpull.v1.XmlPullParserException;
23
24import android.R;
25import android.content.ClipData;
26import android.content.ClipData.Item;
27import android.content.ClipboardManager;
28import android.content.Context;
29import android.content.pm.PackageManager;
30import android.content.res.ColorStateList;
31import android.content.res.Resources;
32import android.content.res.TypedArray;
33import android.content.res.XmlResourceParser;
34import android.graphics.Canvas;
35import android.graphics.Color;
36import android.graphics.Paint;
37import android.graphics.Path;
38import android.graphics.Rect;
39import android.graphics.RectF;
40import android.graphics.Typeface;
41import android.graphics.drawable.Drawable;
42import android.inputmethodservice.ExtractEditText;
43import android.net.Uri;
44import android.os.Bundle;
45import android.os.Handler;
46import android.os.Message;
47import android.os.Parcel;
48import android.os.Parcelable;
49import android.os.ResultReceiver;
50import android.os.SystemClock;
51import android.text.BoringLayout;
52import android.text.DynamicLayout;
53import android.text.Editable;
54import android.text.GetChars;
55import android.text.GraphicsOperations;
56import android.text.InputFilter;
57import android.text.InputType;
58import android.text.Layout;
59import android.text.ParcelableSpan;
60import android.text.Selection;
61import android.text.SpanWatcher;
62import android.text.Spannable;
63import android.text.SpannableString;
64import android.text.Spanned;
65import android.text.SpannedString;
66import android.text.StaticLayout;
67import android.text.TextPaint;
68import android.text.TextUtils;
69import android.text.TextWatcher;
70import android.text.method.ArrowKeyMovementMethod;
71import android.text.method.DateKeyListener;
72import android.text.method.DateTimeKeyListener;
73import android.text.method.DialerKeyListener;
74import android.text.method.DigitsKeyListener;
75import android.text.method.KeyListener;
76import android.text.method.LinkMovementMethod;
77import android.text.method.MetaKeyKeyListener;
78import android.text.method.MovementMethod;
79import android.text.method.PasswordTransformationMethod;
80import android.text.method.SingleLineTransformationMethod;
81import android.text.method.TextKeyListener;
82import android.text.method.TimeKeyListener;
83import android.text.method.TransformationMethod;
84import android.text.style.ClickableSpan;
85import android.text.style.ParagraphStyle;
86import android.text.style.URLSpan;
87import android.text.style.UpdateAppearance;
88import android.text.util.Linkify;
89import android.util.AttributeSet;
90import android.util.FloatMath;
91import android.util.Log;
92import android.util.TypedValue;
93import android.view.ActionMode;
94import android.view.ActionMode.Callback;
95import android.view.ContextMenu;
96import android.view.DragEvent;
97import android.view.Gravity;
98import android.view.HapticFeedbackConstants;
99import android.view.KeyCharacterMap;
100import android.view.KeyEvent;
101import android.view.LayoutInflater;
102import android.view.Menu;
103import android.view.MenuItem;
104import android.view.MotionEvent;
105import android.view.View;
106import android.view.ViewConfiguration;
107import android.view.ViewDebug;
108import android.view.ViewGroup;
109import android.view.ViewGroup.LayoutParams;
110import android.view.ViewParent;
111import android.view.ViewRoot;
112import android.view.ViewTreeObserver;
113import android.view.WindowManager;
114import android.view.accessibility.AccessibilityEvent;
115import android.view.accessibility.AccessibilityManager;
116import android.view.animation.AnimationUtils;
117import android.view.inputmethod.BaseInputConnection;
118import android.view.inputmethod.CompletionInfo;
119import android.view.inputmethod.CorrectionInfo;
120import android.view.inputmethod.EditorInfo;
121import android.view.inputmethod.ExtractedText;
122import android.view.inputmethod.ExtractedTextRequest;
123import android.view.inputmethod.InputConnection;
124import android.view.inputmethod.InputMethodManager;
125import android.widget.RemoteViews.RemoteView;
126
127import java.io.IOException;
128import java.lang.ref.WeakReference;
129import java.util.ArrayList;
130
131/**
132 * Displays text to the user and optionally allows them to edit it.  A TextView
133 * is a complete text editor, however the basic class is configured to not
134 * allow editing; see {@link EditText} for a subclass that configures the text
135 * view for editing.
136 *
137 * <p>
138 * <b>XML attributes</b>
139 * <p>
140 * See {@link android.R.styleable#TextView TextView Attributes},
141 * {@link android.R.styleable#View View Attributes}
142 *
143 * @attr ref android.R.styleable#TextView_text
144 * @attr ref android.R.styleable#TextView_bufferType
145 * @attr ref android.R.styleable#TextView_hint
146 * @attr ref android.R.styleable#TextView_textColor
147 * @attr ref android.R.styleable#TextView_textColorHighlight
148 * @attr ref android.R.styleable#TextView_textColorHint
149 * @attr ref android.R.styleable#TextView_textAppearance
150 * @attr ref android.R.styleable#TextView_textColorLink
151 * @attr ref android.R.styleable#TextView_textSize
152 * @attr ref android.R.styleable#TextView_textScaleX
153 * @attr ref android.R.styleable#TextView_typeface
154 * @attr ref android.R.styleable#TextView_textStyle
155 * @attr ref android.R.styleable#TextView_cursorVisible
156 * @attr ref android.R.styleable#TextView_maxLines
157 * @attr ref android.R.styleable#TextView_maxHeight
158 * @attr ref android.R.styleable#TextView_lines
159 * @attr ref android.R.styleable#TextView_height
160 * @attr ref android.R.styleable#TextView_minLines
161 * @attr ref android.R.styleable#TextView_minHeight
162 * @attr ref android.R.styleable#TextView_maxEms
163 * @attr ref android.R.styleable#TextView_maxWidth
164 * @attr ref android.R.styleable#TextView_ems
165 * @attr ref android.R.styleable#TextView_width
166 * @attr ref android.R.styleable#TextView_minEms
167 * @attr ref android.R.styleable#TextView_minWidth
168 * @attr ref android.R.styleable#TextView_gravity
169 * @attr ref android.R.styleable#TextView_scrollHorizontally
170 * @attr ref android.R.styleable#TextView_password
171 * @attr ref android.R.styleable#TextView_singleLine
172 * @attr ref android.R.styleable#TextView_selectAllOnFocus
173 * @attr ref android.R.styleable#TextView_includeFontPadding
174 * @attr ref android.R.styleable#TextView_maxLength
175 * @attr ref android.R.styleable#TextView_shadowColor
176 * @attr ref android.R.styleable#TextView_shadowDx
177 * @attr ref android.R.styleable#TextView_shadowDy
178 * @attr ref android.R.styleable#TextView_shadowRadius
179 * @attr ref android.R.styleable#TextView_autoLink
180 * @attr ref android.R.styleable#TextView_linksClickable
181 * @attr ref android.R.styleable#TextView_numeric
182 * @attr ref android.R.styleable#TextView_digits
183 * @attr ref android.R.styleable#TextView_phoneNumber
184 * @attr ref android.R.styleable#TextView_inputMethod
185 * @attr ref android.R.styleable#TextView_capitalize
186 * @attr ref android.R.styleable#TextView_autoText
187 * @attr ref android.R.styleable#TextView_editable
188 * @attr ref android.R.styleable#TextView_freezesText
189 * @attr ref android.R.styleable#TextView_ellipsize
190 * @attr ref android.R.styleable#TextView_drawableTop
191 * @attr ref android.R.styleable#TextView_drawableBottom
192 * @attr ref android.R.styleable#TextView_drawableRight
193 * @attr ref android.R.styleable#TextView_drawableLeft
194 * @attr ref android.R.styleable#TextView_drawablePadding
195 * @attr ref android.R.styleable#TextView_lineSpacingExtra
196 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
197 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
198 * @attr ref android.R.styleable#TextView_inputType
199 * @attr ref android.R.styleable#TextView_imeOptions
200 * @attr ref android.R.styleable#TextView_privateImeOptions
201 * @attr ref android.R.styleable#TextView_imeActionLabel
202 * @attr ref android.R.styleable#TextView_imeActionId
203 * @attr ref android.R.styleable#TextView_editorExtras
204 */
205@RemoteView
206public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
207    static final String LOG_TAG = "TextView";
208    static final boolean DEBUG_EXTRACT = false;
209
210    private static final int PRIORITY = 100;
211    private int mCurrentAlpha = 255;
212
213    final int[] mTempCoords = new int[2];
214    Rect mTempRect;
215
216    private ColorStateList mTextColor;
217    private int mCurTextColor;
218    private ColorStateList mHintTextColor;
219    private ColorStateList mLinkTextColor;
220    private int mCurHintTextColor;
221    private boolean mFreezesText;
222    private boolean mFrozenWithFocus;
223    private boolean mTemporaryDetach;
224    private boolean mDispatchTemporaryDetach;
225
226    private boolean mDiscardNextActionUp = false;
227    private boolean mIgnoreActionUpEvent = false;
228
229    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
230    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
231
232    private float mShadowRadius, mShadowDx, mShadowDy;
233
234    private static final int PREDRAW_NOT_REGISTERED = 0;
235    private static final int PREDRAW_PENDING = 1;
236    private static final int PREDRAW_DONE = 2;
237    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
238
239    private TextUtils.TruncateAt mEllipsize = null;
240
241    // Enum for the "typeface" XML parameter.
242    // TODO: How can we get this from the XML instead of hardcoding it here?
243    private static final int SANS = 1;
244    private static final int SERIF = 2;
245    private static final int MONOSPACE = 3;
246
247    // Bitfield for the "numeric" XML parameter.
248    // TODO: How can we get this from the XML instead of hardcoding it here?
249    private static final int SIGNED = 2;
250    private static final int DECIMAL = 4;
251
252    class Drawables {
253        final Rect mCompoundRect = new Rect();
254        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
255        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
256        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
257        int mDrawablePadding;
258    }
259    private Drawables mDrawables;
260
261    private CharSequence mError;
262    private boolean mErrorWasChanged;
263    private ErrorPopup mPopup;
264    /**
265     * This flag is set if the TextView tries to display an error before it
266     * is attached to the window (so its position is still unknown).
267     * It causes the error to be shown later, when onAttachedToWindow()
268     * is called.
269     */
270    private boolean mShowErrorAfterAttach;
271
272    private CharWrapper mCharWrapper = null;
273
274    private boolean mSelectionMoved = false;
275    private boolean mTouchFocusSelected = false;
276
277    private Marquee mMarquee;
278    private boolean mRestartMarquee;
279
280    private int mMarqueeRepeatLimit = 3;
281
282    class InputContentType {
283        int imeOptions = EditorInfo.IME_NULL;
284        String privateImeOptions;
285        CharSequence imeActionLabel;
286        int imeActionId;
287        Bundle extras;
288        OnEditorActionListener onEditorActionListener;
289        boolean enterDown;
290    }
291    InputContentType mInputContentType;
292
293    class InputMethodState {
294        Rect mCursorRectInWindow = new Rect();
295        RectF mTmpRectF = new RectF();
296        float[] mTmpOffset = new float[2];
297        ExtractedTextRequest mExtracting;
298        final ExtractedText mTmpExtracted = new ExtractedText();
299        int mBatchEditNesting;
300        boolean mCursorChanged;
301        boolean mSelectionModeChanged;
302        boolean mContentChanged;
303        int mChangedStart, mChangedEnd, mChangedDelta;
304    }
305    InputMethodState mInputMethodState;
306
307    int mTextSelectHandleLeftRes;
308    int mTextSelectHandleRightRes;
309    int mTextSelectHandleRes;
310    int mTextEditPasteWindowLayout, mTextEditSidePasteWindowLayout;
311    int mTextEditNoPasteWindowLayout, mTextEditSideNoPasteWindowLayout;
312
313    Drawable mSelectHandleLeft;
314    Drawable mSelectHandleRight;
315    Drawable mSelectHandleCenter;
316
317    private int mLastDownPositionX, mLastDownPositionY;
318    private Callback mCustomSelectionActionModeCallback;
319
320    private final int mSquaredTouchSlopDistance;
321    // Set when this TextView gained focus with some text selected. Will start selection mode.
322    private boolean mCreatedWithASelection = false;
323
324    /*
325     * Kick-start the font cache for the zygote process (to pay the cost of
326     * initializing freetype for our default font only once).
327     */
328    static {
329        Paint p = new Paint();
330        p.setAntiAlias(true);
331        // We don't care about the result, just the side-effect of measuring.
332        p.measureText("H");
333    }
334
335    /**
336     * Interface definition for a callback to be invoked when an action is
337     * performed on the editor.
338     */
339    public interface OnEditorActionListener {
340        /**
341         * Called when an action is being performed.
342         *
343         * @param v The view that was clicked.
344         * @param actionId Identifier of the action.  This will be either the
345         * identifier you supplied, or {@link EditorInfo#IME_NULL
346         * EditorInfo.IME_NULL} if being called due to the enter key
347         * being pressed.
348         * @param event If triggered by an enter key, this is the event;
349         * otherwise, this is null.
350         * @return Return true if you have consumed the action, else false.
351         */
352        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
353    }
354
355    public TextView(Context context) {
356        this(context, null);
357    }
358
359    public TextView(Context context,
360                    AttributeSet attrs) {
361        this(context, attrs, com.android.internal.R.attr.textViewStyle);
362    }
363
364    @SuppressWarnings("deprecation")
365    public TextView(Context context,
366                    AttributeSet attrs,
367                    int defStyle) {
368        super(context, attrs, defStyle);
369        mText = "";
370
371        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
372        mTextPaint.density = getResources().getDisplayMetrics().density;
373        mTextPaint.setCompatibilityScaling(
374                getResources().getCompatibilityInfo().applicationScale);
375
376        // If we get the paint from the skin, we should set it to left, since
377        // the layout always wants it to be left.
378        // mTextPaint.setTextAlign(Paint.Align.LEFT);
379
380        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
381        mHighlightPaint.setCompatibilityScaling(
382                getResources().getCompatibilityInfo().applicationScale);
383
384        mMovement = getDefaultMovementMethod();
385        mTransformation = null;
386
387        TypedArray a =
388            context.obtainStyledAttributes(
389                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
390
391        int textColorHighlight = 0;
392        ColorStateList textColor = null;
393        ColorStateList textColorHint = null;
394        ColorStateList textColorLink = null;
395        int textSize = 15;
396        int typefaceIndex = -1;
397        int styleIndex = -1;
398
399        /*
400         * Look the appearance up without checking first if it exists because
401         * almost every TextView has one and it greatly simplifies the logic
402         * to be able to parse the appearance first and then let specific tags
403         * for this View override it.
404         */
405        TypedArray appearance = null;
406        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
407        if (ap != -1) {
408            appearance = context.obtainStyledAttributes(ap,
409                                com.android.internal.R.styleable.
410                                TextAppearance);
411        }
412        if (appearance != null) {
413            int n = appearance.getIndexCount();
414            for (int i = 0; i < n; i++) {
415                int attr = appearance.getIndex(i);
416
417                switch (attr) {
418                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
419                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
420                    break;
421
422                case com.android.internal.R.styleable.TextAppearance_textColor:
423                    textColor = appearance.getColorStateList(attr);
424                    break;
425
426                case com.android.internal.R.styleable.TextAppearance_textColorHint:
427                    textColorHint = appearance.getColorStateList(attr);
428                    break;
429
430                case com.android.internal.R.styleable.TextAppearance_textColorLink:
431                    textColorLink = appearance.getColorStateList(attr);
432                    break;
433
434                case com.android.internal.R.styleable.TextAppearance_textSize:
435                    textSize = appearance.getDimensionPixelSize(attr, textSize);
436                    break;
437
438                case com.android.internal.R.styleable.TextAppearance_typeface:
439                    typefaceIndex = appearance.getInt(attr, -1);
440                    break;
441
442                case com.android.internal.R.styleable.TextAppearance_textStyle:
443                    styleIndex = appearance.getInt(attr, -1);
444                    break;
445                }
446            }
447
448            appearance.recycle();
449        }
450
451        boolean editable = getDefaultEditable();
452        CharSequence inputMethod = null;
453        int numeric = 0;
454        CharSequence digits = null;
455        boolean phone = false;
456        boolean autotext = false;
457        int autocap = -1;
458        int buffertype = 0;
459        boolean selectallonfocus = false;
460        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
461            drawableBottom = null;
462        int drawablePadding = 0;
463        int ellipsize = -1;
464        boolean singleLine = false;
465        int maxlength = -1;
466        CharSequence text = "";
467        CharSequence hint = null;
468        int shadowcolor = 0;
469        float dx = 0, dy = 0, r = 0;
470        boolean password = false;
471        int inputType = EditorInfo.TYPE_NULL;
472
473        int n = a.getIndexCount();
474        for (int i = 0; i < n; i++) {
475            int attr = a.getIndex(i);
476
477            switch (attr) {
478            case com.android.internal.R.styleable.TextView_editable:
479                editable = a.getBoolean(attr, editable);
480                break;
481
482            case com.android.internal.R.styleable.TextView_inputMethod:
483                inputMethod = a.getText(attr);
484                break;
485
486            case com.android.internal.R.styleable.TextView_numeric:
487                numeric = a.getInt(attr, numeric);
488                break;
489
490            case com.android.internal.R.styleable.TextView_digits:
491                digits = a.getText(attr);
492                break;
493
494            case com.android.internal.R.styleable.TextView_phoneNumber:
495                phone = a.getBoolean(attr, phone);
496                break;
497
498            case com.android.internal.R.styleable.TextView_autoText:
499                autotext = a.getBoolean(attr, autotext);
500                break;
501
502            case com.android.internal.R.styleable.TextView_capitalize:
503                autocap = a.getInt(attr, autocap);
504                break;
505
506            case com.android.internal.R.styleable.TextView_bufferType:
507                buffertype = a.getInt(attr, buffertype);
508                break;
509
510            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
511                selectallonfocus = a.getBoolean(attr, selectallonfocus);
512                break;
513
514            case com.android.internal.R.styleable.TextView_autoLink:
515                mAutoLinkMask = a.getInt(attr, 0);
516                break;
517
518            case com.android.internal.R.styleable.TextView_linksClickable:
519                mLinksClickable = a.getBoolean(attr, true);
520                break;
521
522            case com.android.internal.R.styleable.TextView_drawableLeft:
523                drawableLeft = a.getDrawable(attr);
524                break;
525
526            case com.android.internal.R.styleable.TextView_drawableTop:
527                drawableTop = a.getDrawable(attr);
528                break;
529
530            case com.android.internal.R.styleable.TextView_drawableRight:
531                drawableRight = a.getDrawable(attr);
532                break;
533
534            case com.android.internal.R.styleable.TextView_drawableBottom:
535                drawableBottom = a.getDrawable(attr);
536                break;
537
538            case com.android.internal.R.styleable.TextView_drawablePadding:
539                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
540                break;
541
542            case com.android.internal.R.styleable.TextView_maxLines:
543                setMaxLines(a.getInt(attr, -1));
544                break;
545
546            case com.android.internal.R.styleable.TextView_maxHeight:
547                setMaxHeight(a.getDimensionPixelSize(attr, -1));
548                break;
549
550            case com.android.internal.R.styleable.TextView_lines:
551                setLines(a.getInt(attr, -1));
552                break;
553
554            case com.android.internal.R.styleable.TextView_height:
555                setHeight(a.getDimensionPixelSize(attr, -1));
556                break;
557
558            case com.android.internal.R.styleable.TextView_minLines:
559                setMinLines(a.getInt(attr, -1));
560                break;
561
562            case com.android.internal.R.styleable.TextView_minHeight:
563                setMinHeight(a.getDimensionPixelSize(attr, -1));
564                break;
565
566            case com.android.internal.R.styleable.TextView_maxEms:
567                setMaxEms(a.getInt(attr, -1));
568                break;
569
570            case com.android.internal.R.styleable.TextView_maxWidth:
571                setMaxWidth(a.getDimensionPixelSize(attr, -1));
572                break;
573
574            case com.android.internal.R.styleable.TextView_ems:
575                setEms(a.getInt(attr, -1));
576                break;
577
578            case com.android.internal.R.styleable.TextView_width:
579                setWidth(a.getDimensionPixelSize(attr, -1));
580                break;
581
582            case com.android.internal.R.styleable.TextView_minEms:
583                setMinEms(a.getInt(attr, -1));
584                break;
585
586            case com.android.internal.R.styleable.TextView_minWidth:
587                setMinWidth(a.getDimensionPixelSize(attr, -1));
588                break;
589
590            case com.android.internal.R.styleable.TextView_gravity:
591                setGravity(a.getInt(attr, -1));
592                break;
593
594            case com.android.internal.R.styleable.TextView_hint:
595                hint = a.getText(attr);
596                break;
597
598            case com.android.internal.R.styleable.TextView_text:
599                text = a.getText(attr);
600                break;
601
602            case com.android.internal.R.styleable.TextView_scrollHorizontally:
603                if (a.getBoolean(attr, false)) {
604                    setHorizontallyScrolling(true);
605                }
606                break;
607
608            case com.android.internal.R.styleable.TextView_singleLine:
609                singleLine = a.getBoolean(attr, singleLine);
610                break;
611
612            case com.android.internal.R.styleable.TextView_ellipsize:
613                ellipsize = a.getInt(attr, ellipsize);
614                break;
615
616            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
617                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
618                break;
619
620            case com.android.internal.R.styleable.TextView_includeFontPadding:
621                if (!a.getBoolean(attr, true)) {
622                    setIncludeFontPadding(false);
623                }
624                break;
625
626            case com.android.internal.R.styleable.TextView_cursorVisible:
627                if (!a.getBoolean(attr, true)) {
628                    setCursorVisible(false);
629                }
630                break;
631
632            case com.android.internal.R.styleable.TextView_maxLength:
633                maxlength = a.getInt(attr, -1);
634                break;
635
636            case com.android.internal.R.styleable.TextView_textScaleX:
637                setTextScaleX(a.getFloat(attr, 1.0f));
638                break;
639
640            case com.android.internal.R.styleable.TextView_freezesText:
641                mFreezesText = a.getBoolean(attr, false);
642                break;
643
644            case com.android.internal.R.styleable.TextView_shadowColor:
645                shadowcolor = a.getInt(attr, 0);
646                break;
647
648            case com.android.internal.R.styleable.TextView_shadowDx:
649                dx = a.getFloat(attr, 0);
650                break;
651
652            case com.android.internal.R.styleable.TextView_shadowDy:
653                dy = a.getFloat(attr, 0);
654                break;
655
656            case com.android.internal.R.styleable.TextView_shadowRadius:
657                r = a.getFloat(attr, 0);
658                break;
659
660            case com.android.internal.R.styleable.TextView_enabled:
661                setEnabled(a.getBoolean(attr, isEnabled()));
662                break;
663
664            case com.android.internal.R.styleable.TextView_textColorHighlight:
665                textColorHighlight = a.getColor(attr, textColorHighlight);
666                break;
667
668            case com.android.internal.R.styleable.TextView_textColor:
669                textColor = a.getColorStateList(attr);
670                break;
671
672            case com.android.internal.R.styleable.TextView_textColorHint:
673                textColorHint = a.getColorStateList(attr);
674                break;
675
676            case com.android.internal.R.styleable.TextView_textColorLink:
677                textColorLink = a.getColorStateList(attr);
678                break;
679
680            case com.android.internal.R.styleable.TextView_textSize:
681                textSize = a.getDimensionPixelSize(attr, textSize);
682                break;
683
684            case com.android.internal.R.styleable.TextView_typeface:
685                typefaceIndex = a.getInt(attr, typefaceIndex);
686                break;
687
688            case com.android.internal.R.styleable.TextView_textStyle:
689                styleIndex = a.getInt(attr, styleIndex);
690                break;
691
692            case com.android.internal.R.styleable.TextView_password:
693                password = a.getBoolean(attr, password);
694                break;
695
696            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
697                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
698                break;
699
700            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
701                mSpacingMult = a.getFloat(attr, mSpacingMult);
702                break;
703
704            case com.android.internal.R.styleable.TextView_inputType:
705                inputType = a.getInt(attr, mInputType);
706                break;
707
708            case com.android.internal.R.styleable.TextView_imeOptions:
709                if (mInputContentType == null) {
710                    mInputContentType = new InputContentType();
711                }
712                mInputContentType.imeOptions = a.getInt(attr,
713                        mInputContentType.imeOptions);
714                break;
715
716            case com.android.internal.R.styleable.TextView_imeActionLabel:
717                if (mInputContentType == null) {
718                    mInputContentType = new InputContentType();
719                }
720                mInputContentType.imeActionLabel = a.getText(attr);
721                break;
722
723            case com.android.internal.R.styleable.TextView_imeActionId:
724                if (mInputContentType == null) {
725                    mInputContentType = new InputContentType();
726                }
727                mInputContentType.imeActionId = a.getInt(attr,
728                        mInputContentType.imeActionId);
729                break;
730
731            case com.android.internal.R.styleable.TextView_privateImeOptions:
732                setPrivateImeOptions(a.getString(attr));
733                break;
734
735            case com.android.internal.R.styleable.TextView_editorExtras:
736                try {
737                    setInputExtras(a.getResourceId(attr, 0));
738                } catch (XmlPullParserException e) {
739                    Log.w(LOG_TAG, "Failure reading input extras", e);
740                } catch (IOException e) {
741                    Log.w(LOG_TAG, "Failure reading input extras", e);
742                }
743                break;
744
745            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
746                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
747                break;
748
749            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
750                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
751                break;
752
753            case com.android.internal.R.styleable.TextView_textSelectHandle:
754                mTextSelectHandleRes = a.getResourceId(attr, 0);
755                break;
756
757            case com.android.internal.R.styleable.TextView_textEditPasteWindowLayout:
758                mTextEditPasteWindowLayout = a.getResourceId(attr, 0);
759                break;
760
761            case com.android.internal.R.styleable.TextView_textEditNoPasteWindowLayout:
762                mTextEditNoPasteWindowLayout = a.getResourceId(attr, 0);
763                break;
764
765            case com.android.internal.R.styleable.TextView_textEditSidePasteWindowLayout:
766                mTextEditSidePasteWindowLayout = a.getResourceId(attr, 0);
767                break;
768
769            case com.android.internal.R.styleable.TextView_textEditSideNoPasteWindowLayout:
770                mTextEditSideNoPasteWindowLayout = a.getResourceId(attr, 0);
771                break;
772
773            case com.android.internal.R.styleable.TextView_textIsSelectable:
774                mTextIsSelectable = a.getBoolean(attr, false);
775                break;
776            }
777        }
778        a.recycle();
779
780        BufferType bufferType = BufferType.EDITABLE;
781
782        final int variation =
783                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
784        final boolean passwordInputType = variation
785                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
786        final boolean webPasswordInputType = variation
787                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
788        final boolean numberPasswordInputType = variation
789                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
790
791        if (inputMethod != null) {
792            Class<?> c;
793
794            try {
795                c = Class.forName(inputMethod.toString());
796            } catch (ClassNotFoundException ex) {
797                throw new RuntimeException(ex);
798            }
799
800            try {
801                mInput = (KeyListener) c.newInstance();
802            } catch (InstantiationException ex) {
803                throw new RuntimeException(ex);
804            } catch (IllegalAccessException ex) {
805                throw new RuntimeException(ex);
806            }
807            try {
808                mInputType = inputType != EditorInfo.TYPE_NULL
809                        ? inputType
810                        : mInput.getInputType();
811            } catch (IncompatibleClassChangeError e) {
812                mInputType = EditorInfo.TYPE_CLASS_TEXT;
813            }
814        } else if (digits != null) {
815            mInput = DigitsKeyListener.getInstance(digits.toString());
816            // If no input type was specified, we will default to generic
817            // text, since we can't tell the IME about the set of digits
818            // that was selected.
819            mInputType = inputType != EditorInfo.TYPE_NULL
820                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
821        } else if (inputType != EditorInfo.TYPE_NULL) {
822            setInputType(inputType, true);
823            // If set, the input type overrides what was set using the deprecated singleLine flag.
824            singleLine = !isMultilineInputType(inputType);
825        } else if (phone) {
826            mInput = DialerKeyListener.getInstance();
827            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
828        } else if (numeric != 0) {
829            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
830                                                   (numeric & DECIMAL) != 0);
831            inputType = EditorInfo.TYPE_CLASS_NUMBER;
832            if ((numeric & SIGNED) != 0) {
833                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
834            }
835            if ((numeric & DECIMAL) != 0) {
836                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
837            }
838            mInputType = inputType;
839        } else if (autotext || autocap != -1) {
840            TextKeyListener.Capitalize cap;
841
842            inputType = EditorInfo.TYPE_CLASS_TEXT;
843
844            switch (autocap) {
845            case 1:
846                cap = TextKeyListener.Capitalize.SENTENCES;
847                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
848                break;
849
850            case 2:
851                cap = TextKeyListener.Capitalize.WORDS;
852                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
853                break;
854
855            case 3:
856                cap = TextKeyListener.Capitalize.CHARACTERS;
857                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
858                break;
859
860            default:
861                cap = TextKeyListener.Capitalize.NONE;
862                break;
863            }
864
865            mInput = TextKeyListener.getInstance(autotext, cap);
866            mInputType = inputType;
867        } else if (mTextIsSelectable) {
868            // Prevent text changes from keyboard.
869            mInputType = EditorInfo.TYPE_NULL;
870            mInput = null;
871            bufferType = BufferType.SPANNABLE;
872            // Required to request focus while in touch mode.
873            setFocusableInTouchMode(true);
874            // So that selection can be changed using arrow keys and touch is handled.
875            setMovementMethod(ArrowKeyMovementMethod.getInstance());
876        } else if (editable) {
877            mInput = TextKeyListener.getInstance();
878            mInputType = EditorInfo.TYPE_CLASS_TEXT;
879        } else {
880            mInput = null;
881
882            switch (buffertype) {
883                case 0:
884                    bufferType = BufferType.NORMAL;
885                    break;
886                case 1:
887                    bufferType = BufferType.SPANNABLE;
888                    break;
889                case 2:
890                    bufferType = BufferType.EDITABLE;
891                    break;
892            }
893        }
894
895        // mInputType has been set from inputType, possibly modified by mInputMethod.
896        // Specialize mInputType to [web]password if we have a text class and the original input
897        // type was a password.
898        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
899            if (password || passwordInputType) {
900                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
901                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
902            }
903            if (webPasswordInputType) {
904                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
905                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
906            }
907        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
908            if (numberPasswordInputType) {
909                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
910                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
911            }
912        }
913
914        if (selectallonfocus) {
915            mSelectAllOnFocus = true;
916
917            if (bufferType == BufferType.NORMAL)
918                bufferType = BufferType.SPANNABLE;
919        }
920
921        setCompoundDrawablesWithIntrinsicBounds(
922            drawableLeft, drawableTop, drawableRight, drawableBottom);
923        setCompoundDrawablePadding(drawablePadding);
924
925        // Same as setSingleLine(), but make sure the transformation method and the maximum number
926        // of lines of height are unchanged for multi-line TextViews.
927        setInputTypeSingleLine(singleLine);
928        applySingleLine(singleLine, singleLine, singleLine);
929
930        if (singleLine && mInput == null && ellipsize < 0) {
931                ellipsize = 3; // END
932        }
933
934        switch (ellipsize) {
935            case 1:
936                setEllipsize(TextUtils.TruncateAt.START);
937                break;
938            case 2:
939                setEllipsize(TextUtils.TruncateAt.MIDDLE);
940                break;
941            case 3:
942                setEllipsize(TextUtils.TruncateAt.END);
943                break;
944            case 4:
945                setHorizontalFadingEdgeEnabled(true);
946                setEllipsize(TextUtils.TruncateAt.MARQUEE);
947                break;
948        }
949
950        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
951        setHintTextColor(textColorHint);
952        setLinkTextColor(textColorLink);
953        if (textColorHighlight != 0) {
954            setHighlightColor(textColorHighlight);
955        }
956        setRawTextSize(textSize);
957
958        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
959            setTransformationMethod(PasswordTransformationMethod.getInstance());
960            typefaceIndex = MONOSPACE;
961        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
962                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
963            typefaceIndex = MONOSPACE;
964        }
965
966        setTypefaceByIndex(typefaceIndex, styleIndex);
967
968        if (shadowcolor != 0) {
969            setShadowLayer(r, dx, dy, shadowcolor);
970        }
971
972        if (maxlength >= 0) {
973            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
974        } else {
975            setFilters(NO_FILTERS);
976        }
977
978        setText(text, bufferType);
979        if (hint != null) setHint(hint);
980
981        /*
982         * Views are not normally focusable unless specified to be.
983         * However, TextViews that have input or movement methods *are*
984         * focusable by default.
985         */
986        a = context.obtainStyledAttributes(attrs,
987                                           com.android.internal.R.styleable.View,
988                                           defStyle, 0);
989
990        boolean focusable = mMovement != null || mInput != null;
991        boolean clickable = focusable;
992        boolean longClickable = focusable;
993
994        n = a.getIndexCount();
995        for (int i = 0; i < n; i++) {
996            int attr = a.getIndex(i);
997
998            switch (attr) {
999            case com.android.internal.R.styleable.View_focusable:
1000                focusable = a.getBoolean(attr, focusable);
1001                break;
1002
1003            case com.android.internal.R.styleable.View_clickable:
1004                clickable = a.getBoolean(attr, clickable);
1005                break;
1006
1007            case com.android.internal.R.styleable.View_longClickable:
1008                longClickable = a.getBoolean(attr, longClickable);
1009                break;
1010            }
1011        }
1012        a.recycle();
1013
1014        setFocusable(focusable);
1015        setClickable(clickable);
1016        setLongClickable(longClickable);
1017
1018        prepareCursorControllers();
1019
1020        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1021        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1022        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1023    }
1024
1025    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1026        Typeface tf = null;
1027        switch (typefaceIndex) {
1028            case SANS:
1029                tf = Typeface.SANS_SERIF;
1030                break;
1031
1032            case SERIF:
1033                tf = Typeface.SERIF;
1034                break;
1035
1036            case MONOSPACE:
1037                tf = Typeface.MONOSPACE;
1038                break;
1039        }
1040
1041        setTypeface(tf, styleIndex);
1042    }
1043
1044    @Override
1045    public void setEnabled(boolean enabled) {
1046        if (enabled == isEnabled()) {
1047            return;
1048        }
1049
1050        if (!enabled) {
1051            // Hide the soft input if the currently active TextView is disabled
1052            InputMethodManager imm = InputMethodManager.peekInstance();
1053            if (imm != null && imm.isActive(this)) {
1054                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1055            }
1056        }
1057        super.setEnabled(enabled);
1058    }
1059
1060    /**
1061     * Sets the typeface and style in which the text should be displayed,
1062     * and turns on the fake bold and italic bits in the Paint if the
1063     * Typeface that you provided does not have all the bits in the
1064     * style that you specified.
1065     *
1066     * @attr ref android.R.styleable#TextView_typeface
1067     * @attr ref android.R.styleable#TextView_textStyle
1068     */
1069    public void setTypeface(Typeface tf, int style) {
1070        if (style > 0) {
1071            if (tf == null) {
1072                tf = Typeface.defaultFromStyle(style);
1073            } else {
1074                tf = Typeface.create(tf, style);
1075            }
1076
1077            setTypeface(tf);
1078            // now compute what (if any) algorithmic styling is needed
1079            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1080            int need = style & ~typefaceStyle;
1081            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1082            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1083        } else {
1084            mTextPaint.setFakeBoldText(false);
1085            mTextPaint.setTextSkewX(0);
1086            setTypeface(tf);
1087        }
1088    }
1089
1090    /**
1091     * Subclasses override this to specify that they have a KeyListener
1092     * by default even if not specifically called for in the XML options.
1093     */
1094    protected boolean getDefaultEditable() {
1095        return false;
1096    }
1097
1098    /**
1099     * Subclasses override this to specify a default movement method.
1100     */
1101    protected MovementMethod getDefaultMovementMethod() {
1102        return null;
1103    }
1104
1105    /**
1106     * Return the text the TextView is displaying. If setText() was called with
1107     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1108     * the return value from this method to Spannable or Editable, respectively.
1109     *
1110     * Note: The content of the return value should not be modified. If you want
1111     * a modifiable one, you should make your own copy first.
1112     */
1113    @ViewDebug.CapturedViewProperty
1114    public CharSequence getText() {
1115        return mText;
1116    }
1117
1118    /**
1119     * Returns the length, in characters, of the text managed by this TextView
1120     */
1121    public int length() {
1122        return mText.length();
1123    }
1124
1125    /**
1126     * Return the text the TextView is displaying as an Editable object.  If
1127     * the text is not editable, null is returned.
1128     *
1129     * @see #getText
1130     */
1131    public Editable getEditableText() {
1132        return (mText instanceof Editable) ? (Editable)mText : null;
1133    }
1134
1135    /**
1136     * @return the height of one standard line in pixels.  Note that markup
1137     * within the text can cause individual lines to be taller or shorter
1138     * than this height, and the layout may contain additional first-
1139     * or last-line padding.
1140     */
1141    public int getLineHeight() {
1142        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1143    }
1144
1145    /**
1146     * @return the Layout that is currently being used to display the text.
1147     * This can be null if the text or width has recently changes.
1148     */
1149    public final Layout getLayout() {
1150        return mLayout;
1151    }
1152
1153    /**
1154     * @return the current key listener for this TextView.
1155     * This will frequently be null for non-EditText TextViews.
1156     */
1157    public final KeyListener getKeyListener() {
1158        return mInput;
1159    }
1160
1161    /**
1162     * Sets the key listener to be used with this TextView.  This can be null
1163     * to disallow user input.  Note that this method has significant and
1164     * subtle interactions with soft keyboards and other input method:
1165     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1166     * for important details.  Calling this method will replace the current
1167     * content type of the text view with the content type returned by the
1168     * key listener.
1169     * <p>
1170     * Be warned that if you want a TextView with a key listener or movement
1171     * method not to be focusable, or if you want a TextView without a
1172     * key listener or movement method to be focusable, you must call
1173     * {@link #setFocusable} again after calling this to get the focusability
1174     * back the way you want it.
1175     *
1176     * @attr ref android.R.styleable#TextView_numeric
1177     * @attr ref android.R.styleable#TextView_digits
1178     * @attr ref android.R.styleable#TextView_phoneNumber
1179     * @attr ref android.R.styleable#TextView_inputMethod
1180     * @attr ref android.R.styleable#TextView_capitalize
1181     * @attr ref android.R.styleable#TextView_autoText
1182     */
1183    public void setKeyListener(KeyListener input) {
1184        setKeyListenerOnly(input);
1185        fixFocusableAndClickableSettings();
1186
1187        if (input != null) {
1188            try {
1189                mInputType = mInput.getInputType();
1190            } catch (IncompatibleClassChangeError e) {
1191                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1192            }
1193            // Change inputType, without affecting transformation.
1194            // No need to applySingleLine since mSingleLine is unchanged.
1195            setInputTypeSingleLine(mSingleLine);
1196        } else {
1197            mInputType = EditorInfo.TYPE_NULL;
1198        }
1199
1200        InputMethodManager imm = InputMethodManager.peekInstance();
1201        if (imm != null) imm.restartInput(this);
1202    }
1203
1204    private void setKeyListenerOnly(KeyListener input) {
1205        mInput = input;
1206        if (mInput != null && !(mText instanceof Editable))
1207            setText(mText);
1208
1209        setFilters((Editable) mText, mFilters);
1210    }
1211
1212    /**
1213     * @return the movement method being used for this TextView.
1214     * This will frequently be null for non-EditText TextViews.
1215     */
1216    public final MovementMethod getMovementMethod() {
1217        return mMovement;
1218    }
1219
1220    /**
1221     * Sets the movement method (arrow key handler) to be used for
1222     * this TextView.  This can be null to disallow using the arrow keys
1223     * to move the cursor or scroll the view.
1224     * <p>
1225     * Be warned that if you want a TextView with a key listener or movement
1226     * method not to be focusable, or if you want a TextView without a
1227     * key listener or movement method to be focusable, you must call
1228     * {@link #setFocusable} again after calling this to get the focusability
1229     * back the way you want it.
1230     */
1231    public final void setMovementMethod(MovementMethod movement) {
1232        mMovement = movement;
1233
1234        if (mMovement != null && !(mText instanceof Spannable))
1235            setText(mText);
1236
1237        fixFocusableAndClickableSettings();
1238
1239        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1240        prepareCursorControllers();
1241    }
1242
1243    private void fixFocusableAndClickableSettings() {
1244        if ((mMovement != null) || mInput != null) {
1245            setFocusable(true);
1246            setClickable(true);
1247            setLongClickable(true);
1248        } else {
1249            setFocusable(false);
1250            setClickable(false);
1251            setLongClickable(false);
1252        }
1253    }
1254
1255    /**
1256     * @return the current transformation method for this TextView.
1257     * This will frequently be null except for single-line and password
1258     * fields.
1259     */
1260    public final TransformationMethod getTransformationMethod() {
1261        return mTransformation;
1262    }
1263
1264    /**
1265     * Sets the transformation that is applied to the text that this
1266     * TextView is displaying.
1267     *
1268     * @attr ref android.R.styleable#TextView_password
1269     * @attr ref android.R.styleable#TextView_singleLine
1270     */
1271    public final void setTransformationMethod(TransformationMethod method) {
1272        if (method == mTransformation) {
1273            // Avoid the setText() below if the transformation is
1274            // the same.
1275            return;
1276        }
1277        if (mTransformation != null) {
1278            if (mText instanceof Spannable) {
1279                ((Spannable) mText).removeSpan(mTransformation);
1280            }
1281        }
1282
1283        mTransformation = method;
1284
1285        setText(mText);
1286    }
1287
1288    /**
1289     * Returns the top padding of the view, plus space for the top
1290     * Drawable if any.
1291     */
1292    public int getCompoundPaddingTop() {
1293        final Drawables dr = mDrawables;
1294        if (dr == null || dr.mDrawableTop == null) {
1295            return mPaddingTop;
1296        } else {
1297            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1298        }
1299    }
1300
1301    /**
1302     * Returns the bottom padding of the view, plus space for the bottom
1303     * Drawable if any.
1304     */
1305    public int getCompoundPaddingBottom() {
1306        final Drawables dr = mDrawables;
1307        if (dr == null || dr.mDrawableBottom == null) {
1308            return mPaddingBottom;
1309        } else {
1310            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1311        }
1312    }
1313
1314    /**
1315     * Returns the left padding of the view, plus space for the left
1316     * Drawable if any.
1317     */
1318    public int getCompoundPaddingLeft() {
1319        final Drawables dr = mDrawables;
1320        if (dr == null || dr.mDrawableLeft == null) {
1321            return mPaddingLeft;
1322        } else {
1323            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1324        }
1325    }
1326
1327    /**
1328     * Returns the right padding of the view, plus space for the right
1329     * Drawable if any.
1330     */
1331    public int getCompoundPaddingRight() {
1332        final Drawables dr = mDrawables;
1333        if (dr == null || dr.mDrawableRight == null) {
1334            return mPaddingRight;
1335        } else {
1336            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1337        }
1338    }
1339
1340    /**
1341     * Returns the extended top padding of the view, including both the
1342     * top Drawable if any and any extra space to keep more than maxLines
1343     * of text from showing.  It is only valid to call this after measuring.
1344     */
1345    public int getExtendedPaddingTop() {
1346        if (mMaxMode != LINES) {
1347            return getCompoundPaddingTop();
1348        }
1349
1350        if (mLayout.getLineCount() <= mMaximum) {
1351            return getCompoundPaddingTop();
1352        }
1353
1354        int top = getCompoundPaddingTop();
1355        int bottom = getCompoundPaddingBottom();
1356        int viewht = getHeight() - top - bottom;
1357        int layoutht = mLayout.getLineTop(mMaximum);
1358
1359        if (layoutht >= viewht) {
1360            return top;
1361        }
1362
1363        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1364        if (gravity == Gravity.TOP) {
1365            return top;
1366        } else if (gravity == Gravity.BOTTOM) {
1367            return top + viewht - layoutht;
1368        } else { // (gravity == Gravity.CENTER_VERTICAL)
1369            return top + (viewht - layoutht) / 2;
1370        }
1371    }
1372
1373    /**
1374     * Returns the extended bottom padding of the view, including both the
1375     * bottom Drawable if any and any extra space to keep more than maxLines
1376     * of text from showing.  It is only valid to call this after measuring.
1377     */
1378    public int getExtendedPaddingBottom() {
1379        if (mMaxMode != LINES) {
1380            return getCompoundPaddingBottom();
1381        }
1382
1383        if (mLayout.getLineCount() <= mMaximum) {
1384            return getCompoundPaddingBottom();
1385        }
1386
1387        int top = getCompoundPaddingTop();
1388        int bottom = getCompoundPaddingBottom();
1389        int viewht = getHeight() - top - bottom;
1390        int layoutht = mLayout.getLineTop(mMaximum);
1391
1392        if (layoutht >= viewht) {
1393            return bottom;
1394        }
1395
1396        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1397        if (gravity == Gravity.TOP) {
1398            return bottom + viewht - layoutht;
1399        } else if (gravity == Gravity.BOTTOM) {
1400            return bottom;
1401        } else { // (gravity == Gravity.CENTER_VERTICAL)
1402            return bottom + (viewht - layoutht) / 2;
1403        }
1404    }
1405
1406    /**
1407     * Returns the total left padding of the view, including the left
1408     * Drawable if any.
1409     */
1410    public int getTotalPaddingLeft() {
1411        return getCompoundPaddingLeft();
1412    }
1413
1414    /**
1415     * Returns the total right padding of the view, including the right
1416     * Drawable if any.
1417     */
1418    public int getTotalPaddingRight() {
1419        return getCompoundPaddingRight();
1420    }
1421
1422    /**
1423     * Returns the total top padding of the view, including the top
1424     * Drawable if any, the extra space to keep more than maxLines
1425     * from showing, and the vertical offset for gravity, if any.
1426     */
1427    public int getTotalPaddingTop() {
1428        return getExtendedPaddingTop() + getVerticalOffset(true);
1429    }
1430
1431    /**
1432     * Returns the total bottom padding of the view, including the bottom
1433     * Drawable if any, the extra space to keep more than maxLines
1434     * from showing, and the vertical offset for gravity, if any.
1435     */
1436    public int getTotalPaddingBottom() {
1437        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1438    }
1439
1440    /**
1441     * Sets the Drawables (if any) to appear to the left of, above,
1442     * to the right of, and below the text.  Use null if you do not
1443     * want a Drawable there.  The Drawables must already have had
1444     * {@link Drawable#setBounds} called.
1445     *
1446     * @attr ref android.R.styleable#TextView_drawableLeft
1447     * @attr ref android.R.styleable#TextView_drawableTop
1448     * @attr ref android.R.styleable#TextView_drawableRight
1449     * @attr ref android.R.styleable#TextView_drawableBottom
1450     */
1451    public void setCompoundDrawables(Drawable left, Drawable top,
1452                                     Drawable right, Drawable bottom) {
1453        Drawables dr = mDrawables;
1454
1455        final boolean drawables = left != null || top != null
1456                || right != null || bottom != null;
1457
1458        if (!drawables) {
1459            // Clearing drawables...  can we free the data structure?
1460            if (dr != null) {
1461                if (dr.mDrawablePadding == 0) {
1462                    mDrawables = null;
1463                } else {
1464                    // We need to retain the last set padding, so just clear
1465                    // out all of the fields in the existing structure.
1466                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1467                    dr.mDrawableLeft = null;
1468                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1469                    dr.mDrawableTop = null;
1470                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1471                    dr.mDrawableRight = null;
1472                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1473                    dr.mDrawableBottom = null;
1474                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1475                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1476                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1477                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1478                }
1479            }
1480        } else {
1481            if (dr == null) {
1482                mDrawables = dr = new Drawables();
1483            }
1484
1485            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1486                dr.mDrawableLeft.setCallback(null);
1487            }
1488            dr.mDrawableLeft = left;
1489
1490            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1491                dr.mDrawableTop.setCallback(null);
1492            }
1493            dr.mDrawableTop = top;
1494
1495            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1496                dr.mDrawableRight.setCallback(null);
1497            }
1498            dr.mDrawableRight = right;
1499
1500            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1501                dr.mDrawableBottom.setCallback(null);
1502            }
1503            dr.mDrawableBottom = bottom;
1504
1505            final Rect compoundRect = dr.mCompoundRect;
1506            int[] state;
1507
1508            state = getDrawableState();
1509
1510            if (left != null) {
1511                left.setState(state);
1512                left.copyBounds(compoundRect);
1513                left.setCallback(this);
1514                dr.mDrawableSizeLeft = compoundRect.width();
1515                dr.mDrawableHeightLeft = compoundRect.height();
1516            } else {
1517                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1518            }
1519
1520            if (right != null) {
1521                right.setState(state);
1522                right.copyBounds(compoundRect);
1523                right.setCallback(this);
1524                dr.mDrawableSizeRight = compoundRect.width();
1525                dr.mDrawableHeightRight = compoundRect.height();
1526            } else {
1527                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1528            }
1529
1530            if (top != null) {
1531                top.setState(state);
1532                top.copyBounds(compoundRect);
1533                top.setCallback(this);
1534                dr.mDrawableSizeTop = compoundRect.height();
1535                dr.mDrawableWidthTop = compoundRect.width();
1536            } else {
1537                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1538            }
1539
1540            if (bottom != null) {
1541                bottom.setState(state);
1542                bottom.copyBounds(compoundRect);
1543                bottom.setCallback(this);
1544                dr.mDrawableSizeBottom = compoundRect.height();
1545                dr.mDrawableWidthBottom = compoundRect.width();
1546            } else {
1547                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1548            }
1549        }
1550
1551        invalidate();
1552        requestLayout();
1553    }
1554
1555    /**
1556     * Sets the Drawables (if any) to appear to the left of, above,
1557     * to the right of, and below the text.  Use 0 if you do not
1558     * want a Drawable there. The Drawables' bounds will be set to
1559     * their intrinsic bounds.
1560     *
1561     * @param left Resource identifier of the left Drawable.
1562     * @param top Resource identifier of the top Drawable.
1563     * @param right Resource identifier of the right Drawable.
1564     * @param bottom Resource identifier of the bottom Drawable.
1565     *
1566     * @attr ref android.R.styleable#TextView_drawableLeft
1567     * @attr ref android.R.styleable#TextView_drawableTop
1568     * @attr ref android.R.styleable#TextView_drawableRight
1569     * @attr ref android.R.styleable#TextView_drawableBottom
1570     */
1571    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1572        final Resources resources = getContext().getResources();
1573        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1574                top != 0 ? resources.getDrawable(top) : null,
1575                right != 0 ? resources.getDrawable(right) : null,
1576                bottom != 0 ? resources.getDrawable(bottom) : null);
1577    }
1578
1579    /**
1580     * Sets the Drawables (if any) to appear to the left of, above,
1581     * to the right of, and below the text.  Use null if you do not
1582     * want a Drawable there. The Drawables' bounds will be set to
1583     * their intrinsic bounds.
1584     *
1585     * @attr ref android.R.styleable#TextView_drawableLeft
1586     * @attr ref android.R.styleable#TextView_drawableTop
1587     * @attr ref android.R.styleable#TextView_drawableRight
1588     * @attr ref android.R.styleable#TextView_drawableBottom
1589     */
1590    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1591            Drawable right, Drawable bottom) {
1592
1593        if (left != null) {
1594            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1595        }
1596        if (right != null) {
1597            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1598        }
1599        if (top != null) {
1600            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1601        }
1602        if (bottom != null) {
1603            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1604        }
1605        setCompoundDrawables(left, top, right, bottom);
1606    }
1607
1608    /**
1609     * Returns drawables for the left, top, right, and bottom borders.
1610     */
1611    public Drawable[] getCompoundDrawables() {
1612        final Drawables dr = mDrawables;
1613        if (dr != null) {
1614            return new Drawable[] {
1615                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1616            };
1617        } else {
1618            return new Drawable[] { null, null, null, null };
1619        }
1620    }
1621
1622    /**
1623     * Sets the size of the padding between the compound drawables and
1624     * the text.
1625     *
1626     * @attr ref android.R.styleable#TextView_drawablePadding
1627     */
1628    public void setCompoundDrawablePadding(int pad) {
1629        Drawables dr = mDrawables;
1630        if (pad == 0) {
1631            if (dr != null) {
1632                dr.mDrawablePadding = pad;
1633            }
1634        } else {
1635            if (dr == null) {
1636                mDrawables = dr = new Drawables();
1637            }
1638            dr.mDrawablePadding = pad;
1639        }
1640
1641        invalidate();
1642        requestLayout();
1643    }
1644
1645    /**
1646     * Returns the padding between the compound drawables and the text.
1647     */
1648    public int getCompoundDrawablePadding() {
1649        final Drawables dr = mDrawables;
1650        return dr != null ? dr.mDrawablePadding : 0;
1651    }
1652
1653    @Override
1654    public void setPadding(int left, int top, int right, int bottom) {
1655        if (left != mPaddingLeft ||
1656            right != mPaddingRight ||
1657            top != mPaddingTop ||
1658            bottom != mPaddingBottom) {
1659            nullLayouts();
1660        }
1661
1662        // the super call will requestLayout()
1663        super.setPadding(left, top, right, bottom);
1664        invalidate();
1665    }
1666
1667    /**
1668     * Gets the autolink mask of the text.  See {@link
1669     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1670     * possible values.
1671     *
1672     * @attr ref android.R.styleable#TextView_autoLink
1673     */
1674    public final int getAutoLinkMask() {
1675        return mAutoLinkMask;
1676    }
1677
1678    /**
1679     * Sets the text color, size, style, hint color, and highlight color
1680     * from the specified TextAppearance resource.
1681     */
1682    public void setTextAppearance(Context context, int resid) {
1683        TypedArray appearance =
1684            context.obtainStyledAttributes(resid,
1685                                           com.android.internal.R.styleable.TextAppearance);
1686
1687        int color;
1688        ColorStateList colors;
1689        int ts;
1690
1691        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1692        if (color != 0) {
1693            setHighlightColor(color);
1694        }
1695
1696        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1697                                              TextAppearance_textColor);
1698        if (colors != null) {
1699            setTextColor(colors);
1700        }
1701
1702        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1703                                              TextAppearance_textSize, 0);
1704        if (ts != 0) {
1705            setRawTextSize(ts);
1706        }
1707
1708        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1709                                              TextAppearance_textColorHint);
1710        if (colors != null) {
1711            setHintTextColor(colors);
1712        }
1713
1714        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1715                                              TextAppearance_textColorLink);
1716        if (colors != null) {
1717            setLinkTextColor(colors);
1718        }
1719
1720        int typefaceIndex, styleIndex;
1721
1722        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1723                                          TextAppearance_typeface, -1);
1724        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1725                                       TextAppearance_textStyle, -1);
1726
1727        setTypefaceByIndex(typefaceIndex, styleIndex);
1728
1729        appearance.recycle();
1730    }
1731
1732    /**
1733     * @return the size (in pixels) of the default text size in this TextView.
1734     */
1735    public float getTextSize() {
1736        return mTextPaint.getTextSize();
1737    }
1738
1739    /**
1740     * Set the default text size to the given value, interpreted as "scaled
1741     * pixel" units.  This size is adjusted based on the current density and
1742     * user font size preference.
1743     *
1744     * @param size The scaled pixel size.
1745     *
1746     * @attr ref android.R.styleable#TextView_textSize
1747     */
1748    @android.view.RemotableViewMethod
1749    public void setTextSize(float size) {
1750        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1751    }
1752
1753    /**
1754     * Set the default text size to a given unit and value.  See {@link
1755     * TypedValue} for the possible dimension units.
1756     *
1757     * @param unit The desired dimension unit.
1758     * @param size The desired size in the given units.
1759     *
1760     * @attr ref android.R.styleable#TextView_textSize
1761     */
1762    public void setTextSize(int unit, float size) {
1763        Context c = getContext();
1764        Resources r;
1765
1766        if (c == null)
1767            r = Resources.getSystem();
1768        else
1769            r = c.getResources();
1770
1771        setRawTextSize(TypedValue.applyDimension(
1772            unit, size, r.getDisplayMetrics()));
1773    }
1774
1775    private void setRawTextSize(float size) {
1776        if (size != mTextPaint.getTextSize()) {
1777            mTextPaint.setTextSize(size);
1778
1779            if (mLayout != null) {
1780                nullLayouts();
1781                requestLayout();
1782                invalidate();
1783            }
1784        }
1785    }
1786
1787    /**
1788     * @return the extent by which text is currently being stretched
1789     * horizontally.  This will usually be 1.
1790     */
1791    public float getTextScaleX() {
1792        return mTextPaint.getTextScaleX();
1793    }
1794
1795    /**
1796     * Sets the extent by which text should be stretched horizontally.
1797     *
1798     * @attr ref android.R.styleable#TextView_textScaleX
1799     */
1800    @android.view.RemotableViewMethod
1801    public void setTextScaleX(float size) {
1802        if (size != mTextPaint.getTextScaleX()) {
1803            mUserSetTextScaleX = true;
1804            mTextPaint.setTextScaleX(size);
1805
1806            if (mLayout != null) {
1807                nullLayouts();
1808                requestLayout();
1809                invalidate();
1810            }
1811        }
1812    }
1813
1814    /**
1815     * Sets the typeface and style in which the text should be displayed.
1816     * Note that not all Typeface families actually have bold and italic
1817     * variants, so you may need to use
1818     * {@link #setTypeface(Typeface, int)} to get the appearance
1819     * that you actually want.
1820     *
1821     * @attr ref android.R.styleable#TextView_typeface
1822     * @attr ref android.R.styleable#TextView_textStyle
1823     */
1824    public void setTypeface(Typeface tf) {
1825        if (mTextPaint.getTypeface() != tf) {
1826            mTextPaint.setTypeface(tf);
1827
1828            if (mLayout != null) {
1829                nullLayouts();
1830                requestLayout();
1831                invalidate();
1832            }
1833        }
1834    }
1835
1836    /**
1837     * @return the current typeface and style in which the text is being
1838     * displayed.
1839     */
1840    public Typeface getTypeface() {
1841        return mTextPaint.getTypeface();
1842    }
1843
1844    /**
1845     * Sets the text color for all the states (normal, selected,
1846     * focused) to be this color.
1847     *
1848     * @attr ref android.R.styleable#TextView_textColor
1849     */
1850    @android.view.RemotableViewMethod
1851    public void setTextColor(int color) {
1852        mTextColor = ColorStateList.valueOf(color);
1853        updateTextColors();
1854    }
1855
1856    /**
1857     * Sets the text color.
1858     *
1859     * @attr ref android.R.styleable#TextView_textColor
1860     */
1861    public void setTextColor(ColorStateList colors) {
1862        if (colors == null) {
1863            throw new NullPointerException();
1864        }
1865
1866        mTextColor = colors;
1867        updateTextColors();
1868    }
1869
1870    /**
1871     * Return the set of text colors.
1872     *
1873     * @return Returns the set of text colors.
1874     */
1875    public final ColorStateList getTextColors() {
1876        return mTextColor;
1877    }
1878
1879    /**
1880     * <p>Return the current color selected for normal text.</p>
1881     *
1882     * @return Returns the current text color.
1883     */
1884    public final int getCurrentTextColor() {
1885        return mCurTextColor;
1886    }
1887
1888    /**
1889     * Sets the color used to display the selection highlight.
1890     *
1891     * @attr ref android.R.styleable#TextView_textColorHighlight
1892     */
1893    @android.view.RemotableViewMethod
1894    public void setHighlightColor(int color) {
1895        if (mHighlightColor != color) {
1896            mHighlightColor = color;
1897            invalidate();
1898        }
1899    }
1900
1901    /**
1902     * Gives the text a shadow of the specified radius and color, the specified
1903     * distance from its normal position.
1904     *
1905     * @attr ref android.R.styleable#TextView_shadowColor
1906     * @attr ref android.R.styleable#TextView_shadowDx
1907     * @attr ref android.R.styleable#TextView_shadowDy
1908     * @attr ref android.R.styleable#TextView_shadowRadius
1909     */
1910    public void setShadowLayer(float radius, float dx, float dy, int color) {
1911        mTextPaint.setShadowLayer(radius, dx, dy, color);
1912
1913        mShadowRadius = radius;
1914        mShadowDx = dx;
1915        mShadowDy = dy;
1916
1917        invalidate();
1918    }
1919
1920    /**
1921     * @return the base paint used for the text.  Please use this only to
1922     * consult the Paint's properties and not to change them.
1923     */
1924    public TextPaint getPaint() {
1925        return mTextPaint;
1926    }
1927
1928    /**
1929     * Sets the autolink mask of the text.  See {@link
1930     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1931     * possible values.
1932     *
1933     * @attr ref android.R.styleable#TextView_autoLink
1934     */
1935    @android.view.RemotableViewMethod
1936    public final void setAutoLinkMask(int mask) {
1937        mAutoLinkMask = mask;
1938    }
1939
1940    /**
1941     * Sets whether the movement method will automatically be set to
1942     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1943     * set to nonzero and links are detected in {@link #setText}.
1944     * The default is true.
1945     *
1946     * @attr ref android.R.styleable#TextView_linksClickable
1947     */
1948    @android.view.RemotableViewMethod
1949    public final void setLinksClickable(boolean whether) {
1950        mLinksClickable = whether;
1951    }
1952
1953    /**
1954     * Returns whether the movement method will automatically be set to
1955     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1956     * set to nonzero and links are detected in {@link #setText}.
1957     * The default is true.
1958     *
1959     * @attr ref android.R.styleable#TextView_linksClickable
1960     */
1961    public final boolean getLinksClickable() {
1962        return mLinksClickable;
1963    }
1964
1965    /**
1966     * Returns the list of URLSpans attached to the text
1967     * (by {@link Linkify} or otherwise) if any.  You can call
1968     * {@link URLSpan#getURL} on them to find where they link to
1969     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1970     * to find the region of the text they are attached to.
1971     */
1972    public URLSpan[] getUrls() {
1973        if (mText instanceof Spanned) {
1974            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1975        } else {
1976            return new URLSpan[0];
1977        }
1978    }
1979
1980    /**
1981     * Sets the color of the hint text.
1982     *
1983     * @attr ref android.R.styleable#TextView_textColorHint
1984     */
1985    @android.view.RemotableViewMethod
1986    public final void setHintTextColor(int color) {
1987        mHintTextColor = ColorStateList.valueOf(color);
1988        updateTextColors();
1989    }
1990
1991    /**
1992     * Sets the color of the hint text.
1993     *
1994     * @attr ref android.R.styleable#TextView_textColorHint
1995     */
1996    public final void setHintTextColor(ColorStateList colors) {
1997        mHintTextColor = colors;
1998        updateTextColors();
1999    }
2000
2001    /**
2002     * <p>Return the color used to paint the hint text.</p>
2003     *
2004     * @return Returns the list of hint text colors.
2005     */
2006    public final ColorStateList getHintTextColors() {
2007        return mHintTextColor;
2008    }
2009
2010    /**
2011     * <p>Return the current color selected to paint the hint text.</p>
2012     *
2013     * @return Returns the current hint text color.
2014     */
2015    public final int getCurrentHintTextColor() {
2016        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2017    }
2018
2019    /**
2020     * Sets the color of links in the text.
2021     *
2022     * @attr ref android.R.styleable#TextView_textColorLink
2023     */
2024    @android.view.RemotableViewMethod
2025    public final void setLinkTextColor(int color) {
2026        mLinkTextColor = ColorStateList.valueOf(color);
2027        updateTextColors();
2028    }
2029
2030    /**
2031     * Sets the color of links in the text.
2032     *
2033     * @attr ref android.R.styleable#TextView_textColorLink
2034     */
2035    public final void setLinkTextColor(ColorStateList colors) {
2036        mLinkTextColor = colors;
2037        updateTextColors();
2038    }
2039
2040    /**
2041     * <p>Returns the color used to paint links in the text.</p>
2042     *
2043     * @return Returns the list of link text colors.
2044     */
2045    public final ColorStateList getLinkTextColors() {
2046        return mLinkTextColor;
2047    }
2048
2049    /**
2050     * Sets the horizontal alignment of the text and the
2051     * vertical gravity that will be used when there is extra space
2052     * in the TextView beyond what is required for the text itself.
2053     *
2054     * @see android.view.Gravity
2055     * @attr ref android.R.styleable#TextView_gravity
2056     */
2057    public void setGravity(int gravity) {
2058        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
2059            gravity |= Gravity.LEFT;
2060        }
2061        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2062            gravity |= Gravity.TOP;
2063        }
2064
2065        boolean newLayout = false;
2066
2067        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
2068            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
2069            newLayout = true;
2070        }
2071
2072        if (gravity != mGravity) {
2073            invalidate();
2074        }
2075
2076        mGravity = gravity;
2077
2078        if (mLayout != null && newLayout) {
2079            // XXX this is heavy-handed because no actual content changes.
2080            int want = mLayout.getWidth();
2081            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2082
2083            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2084                          mRight - mLeft - getCompoundPaddingLeft() -
2085                          getCompoundPaddingRight(), true);
2086        }
2087    }
2088
2089    /**
2090     * Returns the horizontal and vertical alignment of this TextView.
2091     *
2092     * @see android.view.Gravity
2093     * @attr ref android.R.styleable#TextView_gravity
2094     */
2095    public int getGravity() {
2096        return mGravity;
2097    }
2098
2099    /**
2100     * @return the flags on the Paint being used to display the text.
2101     * @see Paint#getFlags
2102     */
2103    public int getPaintFlags() {
2104        return mTextPaint.getFlags();
2105    }
2106
2107    /**
2108     * Sets flags on the Paint being used to display the text and
2109     * reflows the text if they are different from the old flags.
2110     * @see Paint#setFlags
2111     */
2112    @android.view.RemotableViewMethod
2113    public void setPaintFlags(int flags) {
2114        if (mTextPaint.getFlags() != flags) {
2115            mTextPaint.setFlags(flags);
2116
2117            if (mLayout != null) {
2118                nullLayouts();
2119                requestLayout();
2120                invalidate();
2121            }
2122        }
2123    }
2124
2125    /**
2126     * Sets whether the text should be allowed to be wider than the
2127     * View is.  If false, it will be wrapped to the width of the View.
2128     *
2129     * @attr ref android.R.styleable#TextView_scrollHorizontally
2130     */
2131    public void setHorizontallyScrolling(boolean whether) {
2132        mHorizontallyScrolling = whether;
2133
2134        if (mLayout != null) {
2135            nullLayouts();
2136            requestLayout();
2137            invalidate();
2138        }
2139    }
2140
2141    /**
2142     * Makes the TextView at least this many lines tall.
2143     *
2144     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2145     * set this value to 1.
2146     *
2147     * @attr ref android.R.styleable#TextView_minLines
2148     */
2149    @android.view.RemotableViewMethod
2150    public void setMinLines(int minlines) {
2151        mMinimum = minlines;
2152        mMinMode = LINES;
2153
2154        requestLayout();
2155        invalidate();
2156    }
2157
2158    /**
2159     * Makes the TextView at least this many pixels tall.
2160     *
2161     * Setting this value overrides any other (minimum) number of lines setting.
2162     *
2163     * @attr ref android.R.styleable#TextView_minHeight
2164     */
2165    @android.view.RemotableViewMethod
2166    public void setMinHeight(int minHeight) {
2167        mMinimum = minHeight;
2168        mMinMode = PIXELS;
2169
2170        requestLayout();
2171        invalidate();
2172    }
2173
2174    /**
2175     * Makes the TextView at most this many lines tall.
2176     *
2177     * Setting this value overrides any other (maximum) height setting.
2178     *
2179     * @attr ref android.R.styleable#TextView_maxLines
2180     */
2181    @android.view.RemotableViewMethod
2182    public void setMaxLines(int maxlines) {
2183        mMaximum = maxlines;
2184        mMaxMode = LINES;
2185
2186        requestLayout();
2187        invalidate();
2188    }
2189
2190    /**
2191     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2192     * {@link #setMaxLines(int)} method.
2193     *
2194     * Setting this value overrides any other (maximum) number of lines setting.
2195     *
2196     * @attr ref android.R.styleable#TextView_maxHeight
2197     */
2198    @android.view.RemotableViewMethod
2199    public void setMaxHeight(int maxHeight) {
2200        mMaximum = maxHeight;
2201        mMaxMode = PIXELS;
2202
2203        requestLayout();
2204        invalidate();
2205    }
2206
2207    /**
2208     * Makes the TextView exactly this many lines tall.
2209     *
2210     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2211     * height setting. A single line TextView will set this value to 1.
2212     *
2213     * @attr ref android.R.styleable#TextView_lines
2214     */
2215    @android.view.RemotableViewMethod
2216    public void setLines(int lines) {
2217        mMaximum = mMinimum = lines;
2218        mMaxMode = mMinMode = LINES;
2219
2220        requestLayout();
2221        invalidate();
2222    }
2223
2224    /**
2225     * Makes the TextView exactly this many pixels tall.
2226     * You could do the same thing by specifying this number in the
2227     * LayoutParams.
2228     *
2229     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2230     * height setting.
2231     *
2232     * @attr ref android.R.styleable#TextView_height
2233     */
2234    @android.view.RemotableViewMethod
2235    public void setHeight(int pixels) {
2236        mMaximum = mMinimum = pixels;
2237        mMaxMode = mMinMode = PIXELS;
2238
2239        requestLayout();
2240        invalidate();
2241    }
2242
2243    /**
2244     * Makes the TextView at least this many ems wide
2245     *
2246     * @attr ref android.R.styleable#TextView_minEms
2247     */
2248    @android.view.RemotableViewMethod
2249    public void setMinEms(int minems) {
2250        mMinWidth = minems;
2251        mMinWidthMode = EMS;
2252
2253        requestLayout();
2254        invalidate();
2255    }
2256
2257    /**
2258     * Makes the TextView at least this many pixels wide
2259     *
2260     * @attr ref android.R.styleable#TextView_minWidth
2261     */
2262    @android.view.RemotableViewMethod
2263    public void setMinWidth(int minpixels) {
2264        mMinWidth = minpixels;
2265        mMinWidthMode = PIXELS;
2266
2267        requestLayout();
2268        invalidate();
2269    }
2270
2271    /**
2272     * Makes the TextView at most this many ems wide
2273     *
2274     * @attr ref android.R.styleable#TextView_maxEms
2275     */
2276    @android.view.RemotableViewMethod
2277    public void setMaxEms(int maxems) {
2278        mMaxWidth = maxems;
2279        mMaxWidthMode = EMS;
2280
2281        requestLayout();
2282        invalidate();
2283    }
2284
2285    /**
2286     * Makes the TextView at most this many pixels wide
2287     *
2288     * @attr ref android.R.styleable#TextView_maxWidth
2289     */
2290    @android.view.RemotableViewMethod
2291    public void setMaxWidth(int maxpixels) {
2292        mMaxWidth = maxpixels;
2293        mMaxWidthMode = PIXELS;
2294
2295        requestLayout();
2296        invalidate();
2297    }
2298
2299    /**
2300     * Makes the TextView exactly this many ems wide
2301     *
2302     * @attr ref android.R.styleable#TextView_ems
2303     */
2304    @android.view.RemotableViewMethod
2305    public void setEms(int ems) {
2306        mMaxWidth = mMinWidth = ems;
2307        mMaxWidthMode = mMinWidthMode = EMS;
2308
2309        requestLayout();
2310        invalidate();
2311    }
2312
2313    /**
2314     * Makes the TextView exactly this many pixels wide.
2315     * You could do the same thing by specifying this number in the
2316     * LayoutParams.
2317     *
2318     * @attr ref android.R.styleable#TextView_width
2319     */
2320    @android.view.RemotableViewMethod
2321    public void setWidth(int pixels) {
2322        mMaxWidth = mMinWidth = pixels;
2323        mMaxWidthMode = mMinWidthMode = PIXELS;
2324
2325        requestLayout();
2326        invalidate();
2327    }
2328
2329
2330    /**
2331     * Sets line spacing for this TextView.  Each line will have its height
2332     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2333     *
2334     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2335     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2336     */
2337    public void setLineSpacing(float add, float mult) {
2338        mSpacingMult = mult;
2339        mSpacingAdd = add;
2340
2341        if (mLayout != null) {
2342            nullLayouts();
2343            requestLayout();
2344            invalidate();
2345        }
2346    }
2347
2348    /**
2349     * Convenience method: Append the specified text to the TextView's
2350     * display buffer, upgrading it to BufferType.EDITABLE if it was
2351     * not already editable.
2352     */
2353    public final void append(CharSequence text) {
2354        append(text, 0, text.length());
2355    }
2356
2357    /**
2358     * Convenience method: Append the specified text slice to the TextView's
2359     * display buffer, upgrading it to BufferType.EDITABLE if it was
2360     * not already editable.
2361     */
2362    public void append(CharSequence text, int start, int end) {
2363        if (!(mText instanceof Editable)) {
2364            setText(mText, BufferType.EDITABLE);
2365        }
2366
2367        ((Editable) mText).append(text, start, end);
2368    }
2369
2370    private void updateTextColors() {
2371        boolean inval = false;
2372        int color = mTextColor.getColorForState(getDrawableState(), 0);
2373        if (color != mCurTextColor) {
2374            mCurTextColor = color;
2375            inval = true;
2376        }
2377        if (mLinkTextColor != null) {
2378            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2379            if (color != mTextPaint.linkColor) {
2380                mTextPaint.linkColor = color;
2381                inval = true;
2382            }
2383        }
2384        if (mHintTextColor != null) {
2385            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2386            if (color != mCurHintTextColor && mText.length() == 0) {
2387                mCurHintTextColor = color;
2388                inval = true;
2389            }
2390        }
2391        if (inval) {
2392            invalidate();
2393        }
2394    }
2395
2396    @Override
2397    protected void drawableStateChanged() {
2398        super.drawableStateChanged();
2399        if (mTextColor != null && mTextColor.isStateful()
2400                || (mHintTextColor != null && mHintTextColor.isStateful())
2401                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2402            updateTextColors();
2403        }
2404
2405        final Drawables dr = mDrawables;
2406        if (dr != null) {
2407            int[] state = getDrawableState();
2408            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2409                dr.mDrawableTop.setState(state);
2410            }
2411            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2412                dr.mDrawableBottom.setState(state);
2413            }
2414            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2415                dr.mDrawableLeft.setState(state);
2416            }
2417            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2418                dr.mDrawableRight.setState(state);
2419            }
2420        }
2421    }
2422
2423    /**
2424     * User interface state that is stored by TextView for implementing
2425     * {@link View#onSaveInstanceState}.
2426     */
2427    public static class SavedState extends BaseSavedState {
2428        int selStart;
2429        int selEnd;
2430        CharSequence text;
2431        boolean frozenWithFocus;
2432        CharSequence error;
2433
2434        SavedState(Parcelable superState) {
2435            super(superState);
2436        }
2437
2438        @Override
2439        public void writeToParcel(Parcel out, int flags) {
2440            super.writeToParcel(out, flags);
2441            out.writeInt(selStart);
2442            out.writeInt(selEnd);
2443            out.writeInt(frozenWithFocus ? 1 : 0);
2444            TextUtils.writeToParcel(text, out, flags);
2445
2446            if (error == null) {
2447                out.writeInt(0);
2448            } else {
2449                out.writeInt(1);
2450                TextUtils.writeToParcel(error, out, flags);
2451            }
2452        }
2453
2454        @Override
2455        public String toString() {
2456            String str = "TextView.SavedState{"
2457                    + Integer.toHexString(System.identityHashCode(this))
2458                    + " start=" + selStart + " end=" + selEnd;
2459            if (text != null) {
2460                str += " text=" + text;
2461            }
2462            return str + "}";
2463        }
2464
2465        @SuppressWarnings("hiding")
2466        public static final Parcelable.Creator<SavedState> CREATOR
2467                = new Parcelable.Creator<SavedState>() {
2468            public SavedState createFromParcel(Parcel in) {
2469                return new SavedState(in);
2470            }
2471
2472            public SavedState[] newArray(int size) {
2473                return new SavedState[size];
2474            }
2475        };
2476
2477        private SavedState(Parcel in) {
2478            super(in);
2479            selStart = in.readInt();
2480            selEnd = in.readInt();
2481            frozenWithFocus = (in.readInt() != 0);
2482            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2483
2484            if (in.readInt() != 0) {
2485                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2486            }
2487        }
2488    }
2489
2490    @Override
2491    public Parcelable onSaveInstanceState() {
2492        Parcelable superState = super.onSaveInstanceState();
2493
2494        // Save state if we are forced to
2495        boolean save = mFreezesText;
2496        int start = 0;
2497        int end = 0;
2498
2499        if (mText != null) {
2500            start = getSelectionStart();
2501            end = getSelectionEnd();
2502            if (start >= 0 || end >= 0) {
2503                // Or save state if there is a selection
2504                save = true;
2505            }
2506        }
2507
2508        if (save) {
2509            SavedState ss = new SavedState(superState);
2510            // XXX Should also save the current scroll position!
2511            ss.selStart = start;
2512            ss.selEnd = end;
2513
2514            if (mText instanceof Spanned) {
2515                /*
2516                 * Calling setText() strips off any ChangeWatchers;
2517                 * strip them now to avoid leaking references.
2518                 * But do it to a copy so that if there are any
2519                 * further changes to the text of this view, it
2520                 * won't get into an inconsistent state.
2521                 */
2522
2523                Spannable sp = new SpannableString(mText);
2524
2525                for (ChangeWatcher cw :
2526                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2527                    sp.removeSpan(cw);
2528                }
2529
2530                ss.text = sp;
2531            } else {
2532                ss.text = mText.toString();
2533            }
2534
2535            if (isFocused() && start >= 0 && end >= 0) {
2536                ss.frozenWithFocus = true;
2537            }
2538
2539            ss.error = mError;
2540
2541            return ss;
2542        }
2543
2544        return superState;
2545    }
2546
2547    @Override
2548    public void onRestoreInstanceState(Parcelable state) {
2549        if (!(state instanceof SavedState)) {
2550            super.onRestoreInstanceState(state);
2551            return;
2552        }
2553
2554        SavedState ss = (SavedState)state;
2555        super.onRestoreInstanceState(ss.getSuperState());
2556
2557        // XXX restore buffer type too, as well as lots of other stuff
2558        if (ss.text != null) {
2559            setText(ss.text);
2560        }
2561
2562        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2563            if (mText instanceof Spannable) {
2564                int len = mText.length();
2565
2566                if (ss.selStart > len || ss.selEnd > len) {
2567                    String restored = "";
2568
2569                    if (ss.text != null) {
2570                        restored = "(restored) ";
2571                    }
2572
2573                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2574                          "/" + ss.selEnd + " out of range for " + restored +
2575                          "text " + mText);
2576                } else {
2577                    Selection.setSelection((Spannable) mText, ss.selStart,
2578                                           ss.selEnd);
2579
2580                    if (ss.frozenWithFocus) {
2581                        mFrozenWithFocus = true;
2582                    }
2583                }
2584            }
2585        }
2586
2587        if (ss.error != null) {
2588            final CharSequence error = ss.error;
2589            // Display the error later, after the first layout pass
2590            post(new Runnable() {
2591                public void run() {
2592                    setError(error);
2593                }
2594            });
2595        }
2596    }
2597
2598    /**
2599     * Control whether this text view saves its entire text contents when
2600     * freezing to an icicle, in addition to dynamic state such as cursor
2601     * position.  By default this is false, not saving the text.  Set to true
2602     * if the text in the text view is not being saved somewhere else in
2603     * persistent storage (such as in a content provider) so that if the
2604     * view is later thawed the user will not lose their data.
2605     *
2606     * @param freezesText Controls whether a frozen icicle should include the
2607     * entire text data: true to include it, false to not.
2608     *
2609     * @attr ref android.R.styleable#TextView_freezesText
2610     */
2611    @android.view.RemotableViewMethod
2612    public void setFreezesText(boolean freezesText) {
2613        mFreezesText = freezesText;
2614    }
2615
2616    /**
2617     * Return whether this text view is including its entire text contents
2618     * in frozen icicles.
2619     *
2620     * @return Returns true if text is included, false if it isn't.
2621     *
2622     * @see #setFreezesText
2623     */
2624    public boolean getFreezesText() {
2625        return mFreezesText;
2626    }
2627
2628    ///////////////////////////////////////////////////////////////////////////
2629
2630    /**
2631     * Sets the Factory used to create new Editables.
2632     */
2633    public final void setEditableFactory(Editable.Factory factory) {
2634        mEditableFactory = factory;
2635        setText(mText);
2636    }
2637
2638    /**
2639     * Sets the Factory used to create new Spannables.
2640     */
2641    public final void setSpannableFactory(Spannable.Factory factory) {
2642        mSpannableFactory = factory;
2643        setText(mText);
2644    }
2645
2646    /**
2647     * Sets the string value of the TextView. TextView <em>does not</em> accept
2648     * HTML-like formatting, which you can do with text strings in XML resource files.
2649     * To style your strings, attach android.text.style.* objects to a
2650     * {@link android.text.SpannableString SpannableString}, or see the
2651     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2652     * Available Resource Types</a> documentation for an example of setting
2653     * formatted text in the XML resource file.
2654     *
2655     * @attr ref android.R.styleable#TextView_text
2656     */
2657    @android.view.RemotableViewMethod
2658    public final void setText(CharSequence text) {
2659        setText(text, mBufferType);
2660    }
2661
2662    /**
2663     * Like {@link #setText(CharSequence)},
2664     * except that the cursor position (if any) is retained in the new text.
2665     *
2666     * @param text The new text to place in the text view.
2667     *
2668     * @see #setText(CharSequence)
2669     */
2670    @android.view.RemotableViewMethod
2671    public final void setTextKeepState(CharSequence text) {
2672        setTextKeepState(text, mBufferType);
2673    }
2674
2675    /**
2676     * Sets the text that this TextView is to display (see
2677     * {@link #setText(CharSequence)}) and also sets whether it is stored
2678     * in a styleable/spannable buffer and whether it is editable.
2679     *
2680     * @attr ref android.R.styleable#TextView_text
2681     * @attr ref android.R.styleable#TextView_bufferType
2682     */
2683    public void setText(CharSequence text, BufferType type) {
2684        setText(text, type, true, 0);
2685
2686        if (mCharWrapper != null) {
2687            mCharWrapper.mChars = null;
2688        }
2689    }
2690
2691    private void setText(CharSequence text, BufferType type,
2692                         boolean notifyBefore, int oldlen) {
2693        if (text == null) {
2694            text = "";
2695        }
2696
2697        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2698
2699        if (text instanceof Spanned &&
2700            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2701            setHorizontalFadingEdgeEnabled(true);
2702            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2703        }
2704
2705        int n = mFilters.length;
2706        for (int i = 0; i < n; i++) {
2707            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2708                                                  EMPTY_SPANNED, 0, 0);
2709            if (out != null) {
2710                text = out;
2711            }
2712        }
2713
2714        if (notifyBefore) {
2715            if (mText != null) {
2716                oldlen = mText.length();
2717                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2718            } else {
2719                sendBeforeTextChanged("", 0, 0, text.length());
2720            }
2721        }
2722
2723        boolean needEditableForNotification = false;
2724
2725        if (mListeners != null && mListeners.size() != 0) {
2726            needEditableForNotification = true;
2727        }
2728
2729        if (type == BufferType.EDITABLE || mInput != null ||
2730            needEditableForNotification) {
2731            Editable t = mEditableFactory.newEditable(text);
2732            text = t;
2733            setFilters(t, mFilters);
2734            InputMethodManager imm = InputMethodManager.peekInstance();
2735            if (imm != null) imm.restartInput(this);
2736        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2737            text = mSpannableFactory.newSpannable(text);
2738        } else if (!(text instanceof CharWrapper)) {
2739            text = TextUtils.stringOrSpannedString(text);
2740        }
2741
2742        if (mAutoLinkMask != 0) {
2743            Spannable s2;
2744
2745            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2746                s2 = (Spannable) text;
2747            } else {
2748                s2 = mSpannableFactory.newSpannable(text);
2749            }
2750
2751            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2752                text = s2;
2753                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2754
2755                /*
2756                 * We must go ahead and set the text before changing the
2757                 * movement method, because setMovementMethod() may call
2758                 * setText() again to try to upgrade the buffer type.
2759                 */
2760                mText = text;
2761
2762                // Do not change the movement method for text that support text selection as it
2763                // would prevent an arbitrary cursor displacement.
2764                final boolean hasTextSelection = this instanceof EditText || mTextIsSelectable;
2765                if (mLinksClickable && !hasTextSelection) {
2766                    setMovementMethod(LinkMovementMethod.getInstance());
2767                }
2768            }
2769        }
2770
2771        mBufferType = type;
2772        mText = text;
2773
2774        if (mTransformation == null)
2775            mTransformed = text;
2776        else
2777            mTransformed = mTransformation.getTransformation(text, this);
2778
2779        final int textLength = text.length();
2780
2781        if (text instanceof Spannable) {
2782            Spannable sp = (Spannable) text;
2783
2784            // Remove any ChangeWatchers that might have come
2785            // from other TextViews.
2786            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2787            final int count = watchers.length;
2788            for (int i = 0; i < count; i++)
2789                sp.removeSpan(watchers[i]);
2790
2791            if (mChangeWatcher == null)
2792                mChangeWatcher = new ChangeWatcher();
2793
2794            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2795                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2796
2797            if (mInput != null) {
2798                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2799            }
2800
2801            if (mTransformation != null) {
2802                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2803
2804            }
2805
2806            if (mMovement != null) {
2807                mMovement.initialize(this, (Spannable) text);
2808
2809                /*
2810                 * Initializing the movement method will have set the
2811                 * selection, so reset mSelectionMoved to keep that from
2812                 * interfering with the normal on-focus selection-setting.
2813                 */
2814                mSelectionMoved = false;
2815            }
2816        }
2817
2818        if (mLayout != null) {
2819            checkForRelayout();
2820        }
2821
2822        sendOnTextChanged(text, 0, oldlen, textLength);
2823        onTextChanged(text, 0, oldlen, textLength);
2824
2825        if (needEditableForNotification) {
2826            sendAfterTextChanged((Editable) text);
2827        }
2828
2829        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
2830        prepareCursorControllers();
2831    }
2832
2833    /**
2834     * Sets the TextView to display the specified slice of the specified
2835     * char array.  You must promise that you will not change the contents
2836     * of the array except for right before another call to setText(),
2837     * since the TextView has no way to know that the text
2838     * has changed and that it needs to invalidate and re-layout.
2839     */
2840    public final void setText(char[] text, int start, int len) {
2841        int oldlen = 0;
2842
2843        if (start < 0 || len < 0 || start + len > text.length) {
2844            throw new IndexOutOfBoundsException(start + ", " + len);
2845        }
2846
2847        /*
2848         * We must do the before-notification here ourselves because if
2849         * the old text is a CharWrapper we destroy it before calling
2850         * into the normal path.
2851         */
2852        if (mText != null) {
2853            oldlen = mText.length();
2854            sendBeforeTextChanged(mText, 0, oldlen, len);
2855        } else {
2856            sendBeforeTextChanged("", 0, 0, len);
2857        }
2858
2859        if (mCharWrapper == null) {
2860            mCharWrapper = new CharWrapper(text, start, len);
2861        } else {
2862            mCharWrapper.set(text, start, len);
2863        }
2864
2865        setText(mCharWrapper, mBufferType, false, oldlen);
2866    }
2867
2868    private static class CharWrapper
2869            implements CharSequence, GetChars, GraphicsOperations {
2870        private char[] mChars;
2871        private int mStart, mLength;
2872
2873        public CharWrapper(char[] chars, int start, int len) {
2874            mChars = chars;
2875            mStart = start;
2876            mLength = len;
2877        }
2878
2879        /* package */ void set(char[] chars, int start, int len) {
2880            mChars = chars;
2881            mStart = start;
2882            mLength = len;
2883        }
2884
2885        public int length() {
2886            return mLength;
2887        }
2888
2889        public char charAt(int off) {
2890            return mChars[off + mStart];
2891        }
2892
2893        @Override
2894        public String toString() {
2895            return new String(mChars, mStart, mLength);
2896        }
2897
2898        public CharSequence subSequence(int start, int end) {
2899            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2900                throw new IndexOutOfBoundsException(start + ", " + end);
2901            }
2902
2903            return new String(mChars, start + mStart, end - start);
2904        }
2905
2906        public void getChars(int start, int end, char[] buf, int off) {
2907            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2908                throw new IndexOutOfBoundsException(start + ", " + end);
2909            }
2910
2911            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2912        }
2913
2914        public void drawText(Canvas c, int start, int end,
2915                             float x, float y, Paint p) {
2916            c.drawText(mChars, start + mStart, end - start, x, y, p);
2917        }
2918
2919        public void drawTextRun(Canvas c, int start, int end,
2920                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
2921            int count = end - start;
2922            int contextCount = contextEnd - contextStart;
2923            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
2924                    contextCount, x, y, flags, p);
2925        }
2926
2927        public float measureText(int start, int end, Paint p) {
2928            return p.measureText(mChars, start + mStart, end - start);
2929        }
2930
2931        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2932            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2933        }
2934
2935        public float getTextRunAdvances(int start, int end, int contextStart,
2936                int contextEnd, int flags, float[] advances, int advancesIndex,
2937                Paint p) {
2938            int count = end - start;
2939            int contextCount = contextEnd - contextStart;
2940            return p.getTextRunAdvances(mChars, start + mStart, count,
2941                    contextStart + mStart, contextCount, flags, advances,
2942                    advancesIndex);
2943        }
2944
2945        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
2946                int offset, int cursorOpt, Paint p) {
2947            int contextCount = contextEnd - contextStart;
2948            return p.getTextRunCursor(mChars, contextStart + mStart,
2949                    contextCount, flags, offset + mStart, cursorOpt);
2950        }
2951    }
2952
2953    /**
2954     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2955     * except that the cursor position (if any) is retained in the new text.
2956     *
2957     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2958     */
2959    public final void setTextKeepState(CharSequence text, BufferType type) {
2960        int start = getSelectionStart();
2961        int end = getSelectionEnd();
2962        int len = text.length();
2963
2964        setText(text, type);
2965
2966        if (start >= 0 || end >= 0) {
2967            if (mText instanceof Spannable) {
2968                Selection.setSelection((Spannable) mText,
2969                                       Math.max(0, Math.min(start, len)),
2970                                       Math.max(0, Math.min(end, len)));
2971            }
2972        }
2973    }
2974
2975    @android.view.RemotableViewMethod
2976    public final void setText(int resid) {
2977        setText(getContext().getResources().getText(resid));
2978    }
2979
2980    public final void setText(int resid, BufferType type) {
2981        setText(getContext().getResources().getText(resid), type);
2982    }
2983
2984    /**
2985     * Sets the text to be displayed when the text of the TextView is empty.
2986     * Null means to use the normal empty text. The hint does not currently
2987     * participate in determining the size of the view.
2988     *
2989     * @attr ref android.R.styleable#TextView_hint
2990     */
2991    @android.view.RemotableViewMethod
2992    public final void setHint(CharSequence hint) {
2993        mHint = TextUtils.stringOrSpannedString(hint);
2994
2995        if (mLayout != null) {
2996            checkForRelayout();
2997        }
2998
2999        if (mText.length() == 0) {
3000            invalidate();
3001        }
3002    }
3003
3004    /**
3005     * Sets the text to be displayed when the text of the TextView is empty,
3006     * from a resource.
3007     *
3008     * @attr ref android.R.styleable#TextView_hint
3009     */
3010    @android.view.RemotableViewMethod
3011    public final void setHint(int resid) {
3012        setHint(getContext().getResources().getText(resid));
3013    }
3014
3015    /**
3016     * Returns the hint that is displayed when the text of the TextView
3017     * is empty.
3018     *
3019     * @attr ref android.R.styleable#TextView_hint
3020     */
3021    @ViewDebug.CapturedViewProperty
3022    public CharSequence getHint() {
3023        return mHint;
3024    }
3025
3026    private boolean isMultilineInputType(int type) {
3027        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3028            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3029    }
3030
3031    /**
3032     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3033     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3034     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3035     * then a soft keyboard will not be displayed for this text view.
3036     *
3037     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3038     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3039     * type.
3040     *
3041     * @see #getInputType()
3042     * @see #setRawInputType(int)
3043     * @see android.text.InputType
3044     * @attr ref android.R.styleable#TextView_inputType
3045     */
3046    public void setInputType(int type) {
3047        final boolean wasPassword = isPasswordInputType(mInputType);
3048        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3049        setInputType(type, false);
3050        final boolean isPassword = isPasswordInputType(type);
3051        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3052        boolean forceUpdate = false;
3053        if (isPassword) {
3054            setTransformationMethod(PasswordTransformationMethod.getInstance());
3055            setTypefaceByIndex(MONOSPACE, 0);
3056        } else if (isVisiblePassword) {
3057            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3058                forceUpdate = true;
3059            }
3060            setTypefaceByIndex(MONOSPACE, 0);
3061        } else if (wasPassword || wasVisiblePassword) {
3062            // not in password mode, clean up typeface and transformation
3063            setTypefaceByIndex(-1, -1);
3064            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3065                forceUpdate = true;
3066            }
3067        }
3068
3069        boolean singleLine = !isMultilineInputType(type);
3070
3071        // We need to update the single line mode if it has changed or we
3072        // were previously in password mode.
3073        if (mSingleLine != singleLine || forceUpdate) {
3074            // Change single line mode, but only change the transformation if
3075            // we are not in password mode.
3076            applySingleLine(singleLine, !isPassword, true);
3077        }
3078
3079        InputMethodManager imm = InputMethodManager.peekInstance();
3080        if (imm != null) imm.restartInput(this);
3081    }
3082
3083    /**
3084     * It would be better to rely on the input type for everything. A password inputType should have
3085     * a password transformation. We should hence use isPasswordInputType instead of this method.
3086     *
3087     * We should:
3088     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3089     * would install the correct transformation).
3090     * - Refuse the installation of a non-password transformation in setTransformation if the input
3091     * type is password.
3092     *
3093     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3094     * is useful since it matches what the user can see (obfuscated text or not).
3095     *
3096     * @return true if the current transformation method is of the password type.
3097     */
3098    private boolean hasPasswordTransformationMethod() {
3099        return mTransformation instanceof PasswordTransformationMethod;
3100    }
3101
3102    private boolean isPasswordInputType(int inputType) {
3103        final int variation =
3104                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3105        return variation
3106                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3107                || variation
3108                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3109                || variation
3110                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3111    }
3112
3113    private boolean isVisiblePasswordInputType(int inputType) {
3114        final int variation =
3115                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3116        return variation
3117                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3118    }
3119
3120    /**
3121     * Directly change the content type integer of the text view, without
3122     * modifying any other state.
3123     * @see #setInputType(int)
3124     * @see android.text.InputType
3125     * @attr ref android.R.styleable#TextView_inputType
3126     */
3127    public void setRawInputType(int type) {
3128        mInputType = type;
3129    }
3130
3131    private void setInputType(int type, boolean direct) {
3132        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3133        KeyListener input;
3134        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3135            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3136            TextKeyListener.Capitalize cap;
3137            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3138                cap = TextKeyListener.Capitalize.CHARACTERS;
3139            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3140                cap = TextKeyListener.Capitalize.WORDS;
3141            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3142                cap = TextKeyListener.Capitalize.SENTENCES;
3143            } else {
3144                cap = TextKeyListener.Capitalize.NONE;
3145            }
3146            input = TextKeyListener.getInstance(autotext, cap);
3147        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3148            input = DigitsKeyListener.getInstance(
3149                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3150                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3151        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3152            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3153                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3154                    input = DateKeyListener.getInstance();
3155                    break;
3156                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3157                    input = TimeKeyListener.getInstance();
3158                    break;
3159                default:
3160                    input = DateTimeKeyListener.getInstance();
3161                    break;
3162            }
3163        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3164            input = DialerKeyListener.getInstance();
3165        } else {
3166            input = TextKeyListener.getInstance();
3167        }
3168        setRawInputType(type);
3169        if (direct) mInput = input;
3170        else {
3171            setKeyListenerOnly(input);
3172        }
3173    }
3174
3175    /**
3176     * Get the type of the content.
3177     *
3178     * @see #setInputType(int)
3179     * @see android.text.InputType
3180     */
3181    public int getInputType() {
3182        return mInputType;
3183    }
3184
3185    /**
3186     * Change the editor type integer associated with the text view, which
3187     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3188     * has focus.
3189     * @see #getImeOptions
3190     * @see android.view.inputmethod.EditorInfo
3191     * @attr ref android.R.styleable#TextView_imeOptions
3192     */
3193    public void setImeOptions(int imeOptions) {
3194        if (mInputContentType == null) {
3195            mInputContentType = new InputContentType();
3196        }
3197        mInputContentType.imeOptions = imeOptions;
3198    }
3199
3200    /**
3201     * Get the type of the IME editor.
3202     *
3203     * @see #setImeOptions(int)
3204     * @see android.view.inputmethod.EditorInfo
3205     */
3206    public int getImeOptions() {
3207        return mInputContentType != null
3208                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3209    }
3210
3211    /**
3212     * Change the custom IME action associated with the text view, which
3213     * will be reported to an IME with {@link EditorInfo#actionLabel}
3214     * and {@link EditorInfo#actionId} when it has focus.
3215     * @see #getImeActionLabel
3216     * @see #getImeActionId
3217     * @see android.view.inputmethod.EditorInfo
3218     * @attr ref android.R.styleable#TextView_imeActionLabel
3219     * @attr ref android.R.styleable#TextView_imeActionId
3220     */
3221    public void setImeActionLabel(CharSequence label, int actionId) {
3222        if (mInputContentType == null) {
3223            mInputContentType = new InputContentType();
3224        }
3225        mInputContentType.imeActionLabel = label;
3226        mInputContentType.imeActionId = actionId;
3227    }
3228
3229    /**
3230     * Get the IME action label previous set with {@link #setImeActionLabel}.
3231     *
3232     * @see #setImeActionLabel
3233     * @see android.view.inputmethod.EditorInfo
3234     */
3235    public CharSequence getImeActionLabel() {
3236        return mInputContentType != null
3237                ? mInputContentType.imeActionLabel : null;
3238    }
3239
3240    /**
3241     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3242     *
3243     * @see #setImeActionLabel
3244     * @see android.view.inputmethod.EditorInfo
3245     */
3246    public int getImeActionId() {
3247        return mInputContentType != null
3248                ? mInputContentType.imeActionId : 0;
3249    }
3250
3251    /**
3252     * Set a special listener to be called when an action is performed
3253     * on the text view.  This will be called when the enter key is pressed,
3254     * or when an action supplied to the IME is selected by the user.  Setting
3255     * this means that the normal hard key event will not insert a newline
3256     * into the text view, even if it is multi-line; holding down the ALT
3257     * modifier will, however, allow the user to insert a newline character.
3258     */
3259    public void setOnEditorActionListener(OnEditorActionListener l) {
3260        if (mInputContentType == null) {
3261            mInputContentType = new InputContentType();
3262        }
3263        mInputContentType.onEditorActionListener = l;
3264    }
3265
3266    /**
3267     * Called when an attached input method calls
3268     * {@link InputConnection#performEditorAction(int)
3269     * InputConnection.performEditorAction()}
3270     * for this text view.  The default implementation will call your action
3271     * listener supplied to {@link #setOnEditorActionListener}, or perform
3272     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3273     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3274     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3275     * EditorInfo.IME_ACTION_DONE}.
3276     *
3277     * <p>For backwards compatibility, if no IME options have been set and the
3278     * text view would not normally advance focus on enter, then
3279     * the NEXT and DONE actions received here will be turned into an enter
3280     * key down/up pair to go through the normal key handling.
3281     *
3282     * @param actionCode The code of the action being performed.
3283     *
3284     * @see #setOnEditorActionListener
3285     */
3286    public void onEditorAction(int actionCode) {
3287        final InputContentType ict = mInputContentType;
3288        if (ict != null) {
3289            if (ict.onEditorActionListener != null) {
3290                if (ict.onEditorActionListener.onEditorAction(this,
3291                        actionCode, null)) {
3292                    return;
3293                }
3294            }
3295
3296            // This is the handling for some default action.
3297            // Note that for backwards compatibility we don't do this
3298            // default handling if explicit ime options have not been given,
3299            // instead turning this into the normal enter key codes that an
3300            // app may be expecting.
3301            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3302                View v = focusSearch(FOCUS_DOWN);
3303                if (v != null) {
3304                    if (!v.requestFocus(FOCUS_DOWN)) {
3305                        throw new IllegalStateException("focus search returned a view " +
3306                                "that wasn't able to take focus!");
3307                    }
3308                }
3309                return;
3310
3311            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3312                View v = focusSearch(FOCUS_UP);
3313                if (v != null) {
3314                    if (!v.requestFocus(FOCUS_UP)) {
3315                        throw new IllegalStateException("focus search returned a view " +
3316                                "that wasn't able to take focus!");
3317                    }
3318                }
3319                return;
3320
3321            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3322                InputMethodManager imm = InputMethodManager.peekInstance();
3323                if (imm != null && imm.isActive(this)) {
3324                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3325                }
3326                return;
3327            }
3328        }
3329
3330        Handler h = getHandler();
3331        if (h != null) {
3332            long eventTime = SystemClock.uptimeMillis();
3333            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3334                    new KeyEvent(eventTime, eventTime,
3335                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3336                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3337                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3338                    | KeyEvent.FLAG_EDITOR_ACTION)));
3339            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3340                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3341                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3342                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3343                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3344                    | KeyEvent.FLAG_EDITOR_ACTION)));
3345        }
3346    }
3347
3348    /**
3349     * Set the private content type of the text, which is the
3350     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3351     * field that will be filled in when creating an input connection.
3352     *
3353     * @see #getPrivateImeOptions()
3354     * @see EditorInfo#privateImeOptions
3355     * @attr ref android.R.styleable#TextView_privateImeOptions
3356     */
3357    public void setPrivateImeOptions(String type) {
3358        if (mInputContentType == null) mInputContentType = new InputContentType();
3359        mInputContentType.privateImeOptions = type;
3360    }
3361
3362    /**
3363     * Get the private type of the content.
3364     *
3365     * @see #setPrivateImeOptions(String)
3366     * @see EditorInfo#privateImeOptions
3367     */
3368    public String getPrivateImeOptions() {
3369        return mInputContentType != null
3370                ? mInputContentType.privateImeOptions : null;
3371    }
3372
3373    /**
3374     * Set the extra input data of the text, which is the
3375     * {@link EditorInfo#extras TextBoxAttribute.extras}
3376     * Bundle that will be filled in when creating an input connection.  The
3377     * given integer is the resource ID of an XML resource holding an
3378     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3379     *
3380     * @see #getInputExtras(boolean)
3381     * @see EditorInfo#extras
3382     * @attr ref android.R.styleable#TextView_editorExtras
3383     */
3384    public void setInputExtras(int xmlResId)
3385            throws XmlPullParserException, IOException {
3386        XmlResourceParser parser = getResources().getXml(xmlResId);
3387        if (mInputContentType == null) mInputContentType = new InputContentType();
3388        mInputContentType.extras = new Bundle();
3389        getResources().parseBundleExtras(parser, mInputContentType.extras);
3390    }
3391
3392    /**
3393     * Retrieve the input extras currently associated with the text view, which
3394     * can be viewed as well as modified.
3395     *
3396     * @param create If true, the extras will be created if they don't already
3397     * exist.  Otherwise, null will be returned if none have been created.
3398     * @see #setInputExtras(int)
3399     * @see EditorInfo#extras
3400     * @attr ref android.R.styleable#TextView_editorExtras
3401     */
3402    public Bundle getInputExtras(boolean create) {
3403        if (mInputContentType == null) {
3404            if (!create) return null;
3405            mInputContentType = new InputContentType();
3406        }
3407        if (mInputContentType.extras == null) {
3408            if (!create) return null;
3409            mInputContentType.extras = new Bundle();
3410        }
3411        return mInputContentType.extras;
3412    }
3413
3414    /**
3415     * Returns the error message that was set to be displayed with
3416     * {@link #setError}, or <code>null</code> if no error was set
3417     * or if it the error was cleared by the widget after user input.
3418     */
3419    public CharSequence getError() {
3420        return mError;
3421    }
3422
3423    /**
3424     * Sets the right-hand compound drawable of the TextView to the "error"
3425     * icon and sets an error message that will be displayed in a popup when
3426     * the TextView has focus.  The icon and error message will be reset to
3427     * null when any key events cause changes to the TextView's text.  If the
3428     * <code>error</code> is <code>null</code>, the error message and icon
3429     * will be cleared.
3430     */
3431    @android.view.RemotableViewMethod
3432    public void setError(CharSequence error) {
3433        if (error == null) {
3434            setError(null, null);
3435        } else {
3436            Drawable dr = getContext().getResources().
3437                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3438
3439            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3440            setError(error, dr);
3441        }
3442    }
3443
3444    /**
3445     * Sets the right-hand compound drawable of the TextView to the specified
3446     * icon and sets an error message that will be displayed in a popup when
3447     * the TextView has focus.  The icon and error message will be reset to
3448     * null when any key events cause changes to the TextView's text.  The
3449     * drawable must already have had {@link Drawable#setBounds} set on it.
3450     * If the <code>error</code> is <code>null</code>, the error message will
3451     * be cleared (and you should provide a <code>null</code> icon as well).
3452     */
3453    public void setError(CharSequence error, Drawable icon) {
3454        error = TextUtils.stringOrSpannedString(error);
3455
3456        mError = error;
3457        mErrorWasChanged = true;
3458        final Drawables dr = mDrawables;
3459        if (dr != null) {
3460            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon, dr.mDrawableBottom);
3461        } else {
3462            setCompoundDrawables(null, null, icon, null);
3463        }
3464
3465        if (error == null) {
3466            if (mPopup != null) {
3467                if (mPopup.isShowing()) {
3468                    mPopup.dismiss();
3469                }
3470
3471                mPopup = null;
3472            }
3473        } else {
3474            if (isFocused()) {
3475                showError();
3476            }
3477        }
3478    }
3479
3480    private void showError() {
3481        if (getWindowToken() == null) {
3482            mShowErrorAfterAttach = true;
3483            return;
3484        }
3485
3486        if (mPopup == null) {
3487            LayoutInflater inflater = LayoutInflater.from(getContext());
3488            final TextView err = (TextView) inflater.inflate(
3489                    com.android.internal.R.layout.textview_hint, null);
3490
3491            final float scale = getResources().getDisplayMetrics().density;
3492            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f),
3493                    (int) (50 * scale + 0.5f));
3494            mPopup.setFocusable(false);
3495            // The user is entering text, so the input method is needed.  We
3496            // don't want the popup to be displayed on top of it.
3497            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3498        }
3499
3500        TextView tv = (TextView) mPopup.getContentView();
3501        chooseSize(mPopup, mError, tv);
3502        tv.setText(mError);
3503
3504        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3505        mPopup.fixDirection(mPopup.isAboveAnchor());
3506    }
3507
3508    private static class ErrorPopup extends PopupWindow {
3509        private boolean mAbove = false;
3510        private final TextView mView;
3511        private int mPopupInlineErrorBackgroundId = 0;
3512        private int mPopupInlineErrorAboveBackgroundId = 0;
3513
3514        ErrorPopup(TextView v, int width, int height) {
3515            super(v, width, height);
3516            mView = v;
3517        }
3518
3519        void fixDirection(boolean above) {
3520            mAbove = above;
3521
3522            if (above) {
3523                mPopupInlineErrorAboveBackgroundId =
3524                    getResourceId(mPopupInlineErrorAboveBackgroundId, com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3525            } else {
3526                mPopupInlineErrorBackgroundId =
3527                    getResourceId(mPopupInlineErrorBackgroundId, com.android.internal.R.styleable.Theme_errorMessageBackground);
3528            }
3529
3530            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId);
3531        }
3532
3533        private int getResourceId(int currentId, int index) {
3534            if (currentId == 0) {
3535                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(R.styleable.Theme);
3536                currentId = styledAttributes.getResourceId(index, 0);
3537                styledAttributes.recycle();
3538            }
3539            return currentId;
3540        }
3541
3542        @Override
3543        public void update(int x, int y, int w, int h, boolean force) {
3544            super.update(x, y, w, h, force);
3545
3546            boolean above = isAboveAnchor();
3547            if (above != mAbove) {
3548                fixDirection(above);
3549            }
3550        }
3551    }
3552
3553    /**
3554     * Returns the Y offset to make the pointy top of the error point
3555     * at the middle of the error icon.
3556     */
3557    private int getErrorX() {
3558        /*
3559         * The "25" is the distance between the point and the right edge
3560         * of the background
3561         */
3562        final float scale = getResources().getDisplayMetrics().density;
3563
3564        final Drawables dr = mDrawables;
3565        return getWidth() - mPopup.getWidth()
3566                - getPaddingRight()
3567                - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3568    }
3569
3570    /**
3571     * Returns the Y offset to make the pointy top of the error point
3572     * at the bottom of the error icon.
3573     */
3574    private int getErrorY() {
3575        /*
3576         * Compound, not extended, because the icon is not clipped
3577         * if the text height is smaller.
3578         */
3579        int vspace = mBottom - mTop -
3580                     getCompoundPaddingBottom() - getCompoundPaddingTop();
3581
3582        final Drawables dr = mDrawables;
3583        int icontop = getCompoundPaddingTop()
3584                + (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3585
3586        /*
3587         * The "2" is the distance between the point and the top edge
3588         * of the background.
3589         */
3590
3591        return icontop + (dr != null ? dr.mDrawableHeightRight : 0)
3592                - getHeight() - 2;
3593    }
3594
3595    private void hideError() {
3596        if (mPopup != null) {
3597            if (mPopup.isShowing()) {
3598                mPopup.dismiss();
3599            }
3600        }
3601
3602        mShowErrorAfterAttach = false;
3603    }
3604
3605    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3606        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3607        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3608
3609        /*
3610         * Figure out how big the text would be if we laid it out to the
3611         * full width of this view minus the border.
3612         */
3613        int cap = getWidth() - wid;
3614        if (cap < 0) {
3615            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3616        }
3617
3618        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3619                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3620        float max = 0;
3621        for (int i = 0; i < l.getLineCount(); i++) {
3622            max = Math.max(max, l.getLineWidth(i));
3623        }
3624
3625        /*
3626         * Now set the popup size to be big enough for the text plus the border.
3627         */
3628        pop.setWidth(wid + (int) Math.ceil(max));
3629        pop.setHeight(ht + l.getHeight());
3630    }
3631
3632
3633    @Override
3634    protected boolean setFrame(int l, int t, int r, int b) {
3635        boolean result = super.setFrame(l, t, r, b);
3636
3637        if (mPopup != null) {
3638            TextView tv = (TextView) mPopup.getContentView();
3639            chooseSize(mPopup, mError, tv);
3640            mPopup.update(this, getErrorX(), getErrorY(),
3641                          mPopup.getWidth(), mPopup.getHeight());
3642        }
3643
3644        restartMarqueeIfNeeded();
3645
3646        return result;
3647    }
3648
3649    private void restartMarqueeIfNeeded() {
3650        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3651            mRestartMarquee = false;
3652            startMarquee();
3653        }
3654    }
3655
3656    /**
3657     * Sets the list of input filters that will be used if the buffer is
3658     * Editable.  Has no effect otherwise.
3659     *
3660     * @attr ref android.R.styleable#TextView_maxLength
3661     */
3662    public void setFilters(InputFilter[] filters) {
3663        if (filters == null) {
3664            throw new IllegalArgumentException();
3665        }
3666
3667        mFilters = filters;
3668
3669        if (mText instanceof Editable) {
3670            setFilters((Editable) mText, filters);
3671        }
3672    }
3673
3674    /**
3675     * Sets the list of input filters on the specified Editable,
3676     * and includes mInput in the list if it is an InputFilter.
3677     */
3678    private void setFilters(Editable e, InputFilter[] filters) {
3679        if (mInput instanceof InputFilter) {
3680            InputFilter[] nf = new InputFilter[filters.length + 1];
3681
3682            System.arraycopy(filters, 0, nf, 0, filters.length);
3683            nf[filters.length] = (InputFilter) mInput;
3684
3685            e.setFilters(nf);
3686        } else {
3687            e.setFilters(filters);
3688        }
3689    }
3690
3691    /**
3692     * Returns the current list of input filters.
3693     */
3694    public InputFilter[] getFilters() {
3695        return mFilters;
3696    }
3697
3698    /////////////////////////////////////////////////////////////////////////
3699
3700    private int getVerticalOffset(boolean forceNormal) {
3701        int voffset = 0;
3702        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3703
3704        Layout l = mLayout;
3705        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3706            l = mHintLayout;
3707        }
3708
3709        if (gravity != Gravity.TOP) {
3710            int boxht;
3711
3712            if (l == mHintLayout) {
3713                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3714                        getCompoundPaddingBottom();
3715            } else {
3716                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3717                        getExtendedPaddingBottom();
3718            }
3719            int textht = l.getHeight();
3720
3721            if (textht < boxht) {
3722                if (gravity == Gravity.BOTTOM)
3723                    voffset = boxht - textht;
3724                else // (gravity == Gravity.CENTER_VERTICAL)
3725                    voffset = (boxht - textht) >> 1;
3726            }
3727        }
3728        return voffset;
3729    }
3730
3731    private int getBottomVerticalOffset(boolean forceNormal) {
3732        int voffset = 0;
3733        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3734
3735        Layout l = mLayout;
3736        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3737            l = mHintLayout;
3738        }
3739
3740        if (gravity != Gravity.BOTTOM) {
3741            int boxht;
3742
3743            if (l == mHintLayout) {
3744                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3745                        getCompoundPaddingBottom();
3746            } else {
3747                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3748                        getExtendedPaddingBottom();
3749            }
3750            int textht = l.getHeight();
3751
3752            if (textht < boxht) {
3753                if (gravity == Gravity.TOP)
3754                    voffset = boxht - textht;
3755                else // (gravity == Gravity.CENTER_VERTICAL)
3756                    voffset = (boxht - textht) >> 1;
3757            }
3758        }
3759        return voffset;
3760    }
3761
3762    private void invalidateCursorPath() {
3763        if (mHighlightPathBogus) {
3764            invalidateCursor();
3765        } else {
3766            synchronized (sTempRect) {
3767                /*
3768                 * The reason for this concern about the thickness of the
3769                 * cursor and doing the floor/ceil on the coordinates is that
3770                 * some EditTexts (notably textfields in the Browser) have
3771                 * anti-aliased text where not all the characters are
3772                 * necessarily at integer-multiple locations.  This should
3773                 * make sure the entire cursor gets invalidated instead of
3774                 * sometimes missing half a pixel.
3775                 */
3776
3777                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3778                if (thick < 1.0f) {
3779                    thick = 1.0f;
3780                }
3781
3782                thick /= 2;
3783
3784                mHighlightPath.computeBounds(sTempRect, false);
3785
3786                int left = getCompoundPaddingLeft();
3787                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3788
3789                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3790                           (int) FloatMath.floor(top + sTempRect.top - thick),
3791                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3792                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3793            }
3794        }
3795    }
3796
3797    private void invalidateCursor() {
3798        int where = getSelectionEnd();
3799
3800        invalidateCursor(where, where, where);
3801    }
3802
3803    private void invalidateCursor(int a, int b, int c) {
3804        if (mLayout == null) {
3805            invalidate();
3806        } else {
3807            if (a >= 0 || b >= 0 || c >= 0) {
3808                int first = Math.min(Math.min(a, b), c);
3809                int last = Math.max(Math.max(a, b), c);
3810
3811                int line = mLayout.getLineForOffset(first);
3812                int top = mLayout.getLineTop(line);
3813
3814                // This is ridiculous, but the descent from the line above
3815                // can hang down into the line we really want to redraw,
3816                // so we have to invalidate part of the line above to make
3817                // sure everything that needs to be redrawn really is.
3818                // (But not the whole line above, because that would cause
3819                // the same problem with the descenders on the line above it!)
3820                if (line > 0) {
3821                    top -= mLayout.getLineDescent(line - 1);
3822                }
3823
3824                int line2;
3825
3826                if (first == last)
3827                    line2 = line;
3828                else
3829                    line2 = mLayout.getLineForOffset(last);
3830
3831                int bottom = mLayout.getLineTop(line2 + 1);
3832                int voffset = getVerticalOffset(true);
3833
3834                int left = getCompoundPaddingLeft() + mScrollX;
3835                invalidate(left, top + voffset + getExtendedPaddingTop(),
3836                           left + getWidth() - getCompoundPaddingLeft() -
3837                           getCompoundPaddingRight(),
3838                           bottom + voffset + getExtendedPaddingTop());
3839            }
3840        }
3841    }
3842
3843    private void registerForPreDraw() {
3844        final ViewTreeObserver observer = getViewTreeObserver();
3845        if (observer == null) {
3846            return;
3847        }
3848
3849        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3850            observer.addOnPreDrawListener(this);
3851            mPreDrawState = PREDRAW_PENDING;
3852        } else if (mPreDrawState == PREDRAW_DONE) {
3853            mPreDrawState = PREDRAW_PENDING;
3854        }
3855
3856        // else state is PREDRAW_PENDING, so keep waiting.
3857    }
3858
3859    /**
3860     * {@inheritDoc}
3861     */
3862    public boolean onPreDraw() {
3863        if (mPreDrawState != PREDRAW_PENDING) {
3864            return true;
3865        }
3866
3867        if (mLayout == null) {
3868            assumeLayout();
3869        }
3870
3871        boolean changed = false;
3872
3873        if (mMovement != null) {
3874            /* This code also provides auto-scrolling when a cursor is moved using a
3875             * CursorController (insertion point or selection limits).
3876             * For selection, ensure start or end is visible depending on controller's state.
3877             */
3878            int curs = getSelectionEnd();
3879            // Do not create the controller if it is not already created.
3880            if (mSelectionModifierCursorController != null &&
3881                    mSelectionModifierCursorController.isSelectionStartDragged()) {
3882                curs = getSelectionStart();
3883            }
3884
3885            /*
3886             * TODO: This should really only keep the end in view if
3887             * it already was before the text changed.  I'm not sure
3888             * of a good way to tell from here if it was.
3889             */
3890            if (curs < 0 &&
3891                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3892                curs = mText.length();
3893            }
3894
3895            if (curs >= 0) {
3896                changed = bringPointIntoView(curs);
3897            }
3898        } else {
3899            changed = bringTextIntoView();
3900        }
3901
3902        // This has to be checked here since:
3903        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3904        //   a screen rotation) since layout is not yet initialized at that point.
3905        if (mCreatedWithASelection) {
3906            startSelectionActionMode();
3907            mCreatedWithASelection = false;
3908        }
3909
3910        // Phone specific code (there is no ExtractEditText on tablets).
3911        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
3912        // not be set. Do the test here instead.
3913        if (this instanceof ExtractEditText && hasSelection()) {
3914            startSelectionActionMode();
3915        }
3916
3917        mPreDrawState = PREDRAW_DONE;
3918        return !changed;
3919    }
3920
3921    @Override
3922    protected void onAttachedToWindow() {
3923        super.onAttachedToWindow();
3924
3925        mTemporaryDetach = false;
3926
3927        if (mShowErrorAfterAttach) {
3928            showError();
3929            mShowErrorAfterAttach = false;
3930        }
3931
3932        final ViewTreeObserver observer = getViewTreeObserver();
3933        if (observer != null) {
3934            // No need to create the controller.
3935            // The get method will add the listener on controller creation.
3936            if (mInsertionPointCursorController != null) {
3937                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3938            }
3939            if (mSelectionModifierCursorController != null) {
3940                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3941            }
3942        }
3943    }
3944
3945    @Override
3946    protected void onDetachedFromWindow() {
3947        super.onDetachedFromWindow();
3948
3949        final ViewTreeObserver observer = getViewTreeObserver();
3950        if (observer != null) {
3951            if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3952                observer.removeOnPreDrawListener(this);
3953                mPreDrawState = PREDRAW_NOT_REGISTERED;
3954            }
3955            // No need to create the controller, as getXXController would.
3956            if (mInsertionPointCursorController != null) {
3957                observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3958            }
3959            if (mSelectionModifierCursorController != null) {
3960                observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3961            }
3962        }
3963
3964        if (mError != null) {
3965            hideError();
3966        }
3967
3968        if (mBlink != null) {
3969            mBlink.cancel();
3970        }
3971
3972        if (mInsertionPointCursorController != null) {
3973            mInsertionPointCursorController.onDetached();
3974        }
3975
3976        if (mSelectionModifierCursorController != null) {
3977            mSelectionModifierCursorController.onDetached();
3978        }
3979
3980        hideControllers();
3981    }
3982
3983    @Override
3984    protected boolean isPaddingOffsetRequired() {
3985        return mShadowRadius != 0 || mDrawables != null;
3986    }
3987
3988    @Override
3989    protected int getLeftPaddingOffset() {
3990        return getCompoundPaddingLeft() - mPaddingLeft +
3991                (int) Math.min(0, mShadowDx - mShadowRadius);
3992    }
3993
3994    @Override
3995    protected int getTopPaddingOffset() {
3996        return (int) Math.min(0, mShadowDy - mShadowRadius);
3997    }
3998
3999    @Override
4000    protected int getBottomPaddingOffset() {
4001        return (int) Math.max(0, mShadowDy + mShadowRadius);
4002    }
4003
4004    @Override
4005    protected int getRightPaddingOffset() {
4006        return -(getCompoundPaddingRight() - mPaddingRight) +
4007                (int) Math.max(0, mShadowDx + mShadowRadius);
4008    }
4009
4010    @Override
4011    protected boolean verifyDrawable(Drawable who) {
4012        final boolean verified = super.verifyDrawable(who);
4013        if (!verified && mDrawables != null) {
4014            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4015                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
4016        }
4017        return verified;
4018    }
4019
4020    @Override
4021    public void jumpDrawablesToCurrentState() {
4022        super.jumpDrawablesToCurrentState();
4023        if (mDrawables != null) {
4024            if (mDrawables.mDrawableLeft != null) {
4025                mDrawables.mDrawableLeft.jumpToCurrentState();
4026            }
4027            if (mDrawables.mDrawableTop != null) {
4028                mDrawables.mDrawableTop.jumpToCurrentState();
4029            }
4030            if (mDrawables.mDrawableRight != null) {
4031                mDrawables.mDrawableRight.jumpToCurrentState();
4032            }
4033            if (mDrawables.mDrawableBottom != null) {
4034                mDrawables.mDrawableBottom.jumpToCurrentState();
4035            }
4036        }
4037    }
4038
4039    @Override
4040    public void invalidateDrawable(Drawable drawable) {
4041        if (verifyDrawable(drawable)) {
4042            final Rect dirty = drawable.getBounds();
4043            int scrollX = mScrollX;
4044            int scrollY = mScrollY;
4045
4046            // IMPORTANT: The coordinates below are based on the coordinates computed
4047            // for each compound drawable in onDraw(). Make sure to update each section
4048            // accordingly.
4049            final TextView.Drawables drawables = mDrawables;
4050            if (drawables != null) {
4051                if (drawable == drawables.mDrawableLeft) {
4052                    final int compoundPaddingTop = getCompoundPaddingTop();
4053                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4054                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4055
4056                    scrollX += mPaddingLeft;
4057                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4058                } else if (drawable == drawables.mDrawableRight) {
4059                    final int compoundPaddingTop = getCompoundPaddingTop();
4060                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4061                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4062
4063                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4064                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4065                } else if (drawable == drawables.mDrawableTop) {
4066                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4067                    final int compoundPaddingRight = getCompoundPaddingRight();
4068                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4069
4070                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4071                    scrollY += mPaddingTop;
4072                } else if (drawable == drawables.mDrawableBottom) {
4073                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4074                    final int compoundPaddingRight = getCompoundPaddingRight();
4075                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4076
4077                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4078                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4079                }
4080            }
4081
4082            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4083                    dirty.right + scrollX, dirty.bottom + scrollY);
4084        }
4085    }
4086
4087    @Override
4088    protected boolean onSetAlpha(int alpha) {
4089        // Alpha is supported if and only if the drawing can be done in one pass.
4090        // TODO text with spans with a background color currently do not respect this alpha.
4091        if (getBackground() == null) {
4092            mCurrentAlpha = alpha;
4093            final Drawables dr = mDrawables;
4094            if (dr != null) {
4095                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4096                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4097                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4098                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4099            }
4100            return true;
4101        }
4102
4103        mCurrentAlpha = 255;
4104        return false;
4105    }
4106
4107    /**
4108     * When a TextView is used to display a useful piece of information to the user (such as a
4109     * contact's address), it should be made selectable, so that the user can select and copy this
4110     * content.
4111     *
4112     * Use {@link #setTextIsSelectable(boolean)} or the
4113     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4114     * selectable (text is not selectable by default).
4115     *
4116     * Note that the content of an EditText is always selectable.
4117     *
4118     * @return True if the text displayed in this TextView can be selected by the user.
4119     *
4120     * @attr ref android.R.styleable#TextView_textIsSelectable
4121     */
4122    public boolean isTextSelectable() {
4123        return mTextIsSelectable;
4124    }
4125
4126    /**
4127     * Sets whether or not (default) the content of this view is selectable by the user.
4128     *
4129     * Note that this methods affect the {@link #setFocusable(boolean)},
4130     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4131     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4132     * customized.
4133     *
4134     * See {@link #isTextSelectable} for details.
4135     *
4136     * @param selectable Whether or not the content of this TextView should be selectable.
4137     */
4138    public void setTextIsSelectable(boolean selectable) {
4139        if (mTextIsSelectable == selectable) return;
4140
4141        mTextIsSelectable = selectable;
4142
4143        setFocusableInTouchMode(selectable);
4144        setFocusable(selectable);
4145        setClickable(selectable);
4146        setLongClickable(selectable);
4147
4148        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4149
4150        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4151        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4152
4153        // Called by setText above, but safer in case of future code changes
4154        prepareCursorControllers();
4155    }
4156
4157    @Override
4158    protected int[] onCreateDrawableState(int extraSpace) {
4159        final int[] drawableState;
4160
4161        if (mSingleLine) {
4162            drawableState = super.onCreateDrawableState(extraSpace);
4163        } else {
4164            drawableState = super.onCreateDrawableState(extraSpace + 1);
4165            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4166        }
4167
4168        if (mTextIsSelectable) {
4169            // Disable pressed state, which was introduced when TextView was made clickable.
4170            // Prevents text color change.
4171            // setClickable(false) would have a similar effect, but it also disables focus changes
4172            // and long press actions, which are both needed by text selection.
4173            final int length = drawableState.length;
4174            for (int i = 0; i < length; i++) {
4175                if (drawableState[i] == R.attr.state_pressed) {
4176                    final int[] nonPressedState = new int[length - 1];
4177                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4178                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4179                    return nonPressedState;
4180                }
4181            }
4182        }
4183
4184        return drawableState;
4185    }
4186
4187    @Override
4188    protected void onDraw(Canvas canvas) {
4189        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4190
4191        restartMarqueeIfNeeded();
4192
4193        // Draw the background for this view
4194        super.onDraw(canvas);
4195
4196        final int compoundPaddingLeft = getCompoundPaddingLeft();
4197        final int compoundPaddingTop = getCompoundPaddingTop();
4198        final int compoundPaddingRight = getCompoundPaddingRight();
4199        final int compoundPaddingBottom = getCompoundPaddingBottom();
4200        final int scrollX = mScrollX;
4201        final int scrollY = mScrollY;
4202        final int right = mRight;
4203        final int left = mLeft;
4204        final int bottom = mBottom;
4205        final int top = mTop;
4206
4207        final Drawables dr = mDrawables;
4208        if (dr != null) {
4209            /*
4210             * Compound, not extended, because the icon is not clipped
4211             * if the text height is smaller.
4212             */
4213
4214            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4215            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4216
4217            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4218            // Make sure to update invalidateDrawable() when changing this code.
4219            if (dr.mDrawableLeft != null) {
4220                canvas.save();
4221                canvas.translate(scrollX + mPaddingLeft,
4222                                 scrollY + compoundPaddingTop +
4223                                 (vspace - dr.mDrawableHeightLeft) / 2);
4224                dr.mDrawableLeft.draw(canvas);
4225                canvas.restore();
4226            }
4227
4228            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4229            // Make sure to update invalidateDrawable() when changing this code.
4230            if (dr.mDrawableRight != null) {
4231                canvas.save();
4232                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4233                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4234                dr.mDrawableRight.draw(canvas);
4235                canvas.restore();
4236            }
4237
4238            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4239            // Make sure to update invalidateDrawable() when changing this code.
4240            if (dr.mDrawableTop != null) {
4241                canvas.save();
4242                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4243                        scrollY + mPaddingTop);
4244                dr.mDrawableTop.draw(canvas);
4245                canvas.restore();
4246            }
4247
4248            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4249            // Make sure to update invalidateDrawable() when changing this code.
4250            if (dr.mDrawableBottom != null) {
4251                canvas.save();
4252                canvas.translate(scrollX + compoundPaddingLeft +
4253                        (hspace - dr.mDrawableWidthBottom) / 2,
4254                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4255                dr.mDrawableBottom.draw(canvas);
4256                canvas.restore();
4257            }
4258        }
4259
4260        if (mPreDrawState == PREDRAW_DONE) {
4261            final ViewTreeObserver observer = getViewTreeObserver();
4262            if (observer != null) {
4263                observer.removeOnPreDrawListener(this);
4264                mPreDrawState = PREDRAW_NOT_REGISTERED;
4265            }
4266        }
4267
4268        int color = mCurTextColor;
4269
4270        if (mLayout == null) {
4271            assumeLayout();
4272        }
4273
4274        Layout layout = mLayout;
4275        int cursorcolor = color;
4276
4277        if (mHint != null && mText.length() == 0) {
4278            if (mHintTextColor != null) {
4279                color = mCurHintTextColor;
4280            }
4281
4282            layout = mHintLayout;
4283        }
4284
4285        mTextPaint.setColor(color);
4286        if (mCurrentAlpha != 255) {
4287            // If set, the alpha will override the color's alpha. Multiply the alphas.
4288            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4289        }
4290        mTextPaint.drawableState = getDrawableState();
4291
4292        canvas.save();
4293        /*  Would be faster if we didn't have to do this. Can we chop the
4294            (displayable) text so that we don't need to do this ever?
4295        */
4296
4297        int extendedPaddingTop = getExtendedPaddingTop();
4298        int extendedPaddingBottom = getExtendedPaddingBottom();
4299
4300        float clipLeft = compoundPaddingLeft + scrollX;
4301        float clipTop = extendedPaddingTop + scrollY;
4302        float clipRight = right - left - compoundPaddingRight + scrollX;
4303        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4304
4305        if (mShadowRadius != 0) {
4306            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4307            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4308
4309            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4310            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4311        }
4312
4313        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4314
4315        int voffsetText = 0;
4316        int voffsetCursor = 0;
4317
4318        // translate in by our padding
4319        {
4320            /* shortcircuit calling getVerticaOffset() */
4321            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4322                voffsetText = getVerticalOffset(false);
4323                voffsetCursor = getVerticalOffset(true);
4324            }
4325            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4326        }
4327
4328        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4329            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4330                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4331                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4332                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4333            }
4334
4335            if (mMarquee != null && mMarquee.isRunning()) {
4336                canvas.translate(-mMarquee.mScroll, 0.0f);
4337            }
4338        }
4339
4340        Path highlight = null;
4341        int selStart = -1, selEnd = -1;
4342
4343        //  If there is no movement method, then there can be no selection.
4344        //  Check that first and attempt to skip everything having to do with
4345        //  the cursor.
4346        //  XXX This is not strictly true -- a program could set the
4347        //  selection manually if it really wanted to.
4348        if (mMovement != null && (isFocused() || isPressed())) {
4349            selStart = getSelectionStart();
4350            selEnd = getSelectionEnd();
4351
4352            if ((isCursorVisible() || mTextIsSelectable) && selStart >= 0 && isEnabled()) {
4353                if (mHighlightPath == null)
4354                    mHighlightPath = new Path();
4355
4356                if (selStart == selEnd) {
4357                    if (!mTextIsSelectable &&
4358                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4359                        if (mHighlightPathBogus) {
4360                            mHighlightPath.reset();
4361                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4362                            mHighlightPathBogus = false;
4363                        }
4364
4365                        // XXX should pass to skin instead of drawing directly
4366                        mHighlightPaint.setColor(cursorcolor);
4367                        if (mCurrentAlpha != 255) {
4368                            mHighlightPaint.setAlpha(
4369                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4370                        }
4371                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4372
4373                        highlight = mHighlightPath;
4374                    }
4375                } else {
4376                    if (mHighlightPathBogus) {
4377                        mHighlightPath.reset();
4378                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4379                        mHighlightPathBogus = false;
4380                    }
4381
4382                    // XXX should pass to skin instead of drawing directly
4383                    mHighlightPaint.setColor(mHighlightColor);
4384                    if (mCurrentAlpha != 255) {
4385                        mHighlightPaint.setAlpha(
4386                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4387                    }
4388                    mHighlightPaint.setStyle(Paint.Style.FILL);
4389
4390                    highlight = mHighlightPath;
4391                }
4392            }
4393        }
4394
4395        /*  Comment out until we decide what to do about animations
4396        boolean isLinearTextOn = false;
4397        if (currentTransformation != null) {
4398            isLinearTextOn = mTextPaint.isLinearTextOn();
4399            Matrix m = currentTransformation.getMatrix();
4400            if (!m.isIdentity()) {
4401                // mTextPaint.setLinearTextOn(true);
4402            }
4403        }
4404        */
4405
4406        final InputMethodState ims = mInputMethodState;
4407        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4408        if (ims != null && ims.mBatchEditNesting == 0) {
4409            InputMethodManager imm = InputMethodManager.peekInstance();
4410            if (imm != null) {
4411                if (imm.isActive(this)) {
4412                    boolean reported = false;
4413                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4414                        // We are in extract mode and the content has changed
4415                        // in some way... just report complete new text to the
4416                        // input method.
4417                        reported = reportExtractedText();
4418                    }
4419                    if (!reported && highlight != null) {
4420                        int candStart = -1;
4421                        int candEnd = -1;
4422                        if (mText instanceof Spannable) {
4423                            Spannable sp = (Spannable)mText;
4424                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4425                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4426                        }
4427                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4428                    }
4429                }
4430
4431                if (imm.isWatchingCursor(this) && highlight != null) {
4432                    highlight.computeBounds(ims.mTmpRectF, true);
4433                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4434
4435                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4436                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4437
4438                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4439
4440                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4441                            (int)(ims.mTmpRectF.top + 0.5),
4442                            (int)(ims.mTmpRectF.right + 0.5),
4443                            (int)(ims.mTmpRectF.bottom + 0.5));
4444
4445                    imm.updateCursor(this,
4446                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4447                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4448                }
4449            }
4450        }
4451
4452        if (mCorrectionHighlighter != null) {
4453            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4454        }
4455
4456        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4457
4458        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4459            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4460            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4461        }
4462
4463        /*  Comment out until we decide what to do about animations
4464        if (currentTransformation != null) {
4465            mTextPaint.setLinearTextOn(isLinearTextOn);
4466        }
4467        */
4468
4469        canvas.restore();
4470
4471        updateCursorControllerPositions();
4472    }
4473
4474    /**
4475     * Update the positions of the CursorControllers.  Needed by WebTextView,
4476     * which does not draw.
4477     * @hide
4478     */
4479    protected void updateCursorControllerPositions() {
4480        // No need to create the controllers if they were not already
4481        if (mInsertionPointCursorController != null &&
4482                mInsertionPointCursorController.isShowing()) {
4483            mInsertionPointCursorController.updatePosition();
4484        }
4485        if (mSelectionModifierCursorController != null &&
4486                mSelectionModifierCursorController.isShowing()) {
4487            mSelectionModifierCursorController.updatePosition();
4488        }
4489    }
4490
4491    @Override
4492    public void getFocusedRect(Rect r) {
4493        if (mLayout == null) {
4494            super.getFocusedRect(r);
4495            return;
4496        }
4497
4498        int sel = getSelectionEnd();
4499        if (sel < 0) {
4500            super.getFocusedRect(r);
4501            return;
4502        }
4503
4504        int line = mLayout.getLineForOffset(sel);
4505        r.top = mLayout.getLineTop(line);
4506        r.bottom = mLayout.getLineBottom(line);
4507
4508        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4509        r.right = r.left + 1;
4510
4511        // Adjust for padding and gravity.
4512        int paddingLeft = getCompoundPaddingLeft();
4513        int paddingTop = getExtendedPaddingTop();
4514        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4515            paddingTop += getVerticalOffset(false);
4516        }
4517        r.offset(paddingLeft, paddingTop);
4518    }
4519
4520    /**
4521     * Return the number of lines of text, or 0 if the internal Layout has not
4522     * been built.
4523     */
4524    public int getLineCount() {
4525        return mLayout != null ? mLayout.getLineCount() : 0;
4526    }
4527
4528    /**
4529     * Return the baseline for the specified line (0...getLineCount() - 1)
4530     * If bounds is not null, return the top, left, right, bottom extents
4531     * of the specified line in it. If the internal Layout has not been built,
4532     * return 0 and set bounds to (0, 0, 0, 0)
4533     * @param line which line to examine (0..getLineCount() - 1)
4534     * @param bounds Optional. If not null, it returns the extent of the line
4535     * @return the Y-coordinate of the baseline
4536     */
4537    public int getLineBounds(int line, Rect bounds) {
4538        if (mLayout == null) {
4539            if (bounds != null) {
4540                bounds.set(0, 0, 0, 0);
4541            }
4542            return 0;
4543        }
4544        else {
4545            int baseline = mLayout.getLineBounds(line, bounds);
4546
4547            int voffset = getExtendedPaddingTop();
4548            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4549                voffset += getVerticalOffset(true);
4550            }
4551            if (bounds != null) {
4552                bounds.offset(getCompoundPaddingLeft(), voffset);
4553            }
4554            return baseline + voffset;
4555        }
4556    }
4557
4558    @Override
4559    public int getBaseline() {
4560        if (mLayout == null) {
4561            return super.getBaseline();
4562        }
4563
4564        int voffset = 0;
4565        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4566            voffset = getVerticalOffset(true);
4567        }
4568
4569        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4570    }
4571
4572    @Override
4573    public boolean onKeyDown(int keyCode, KeyEvent event) {
4574        int which = doKeyDown(keyCode, event, null);
4575        if (which == 0) {
4576            // Go through default dispatching.
4577            return super.onKeyDown(keyCode, event);
4578        }
4579
4580        return true;
4581    }
4582
4583    @Override
4584    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4585        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4586
4587        int which = doKeyDown(keyCode, down, event);
4588        if (which == 0) {
4589            // Go through default dispatching.
4590            return super.onKeyMultiple(keyCode, repeatCount, event);
4591        }
4592        if (which == -1) {
4593            // Consumed the whole thing.
4594            return true;
4595        }
4596
4597        repeatCount--;
4598
4599        // We are going to dispatch the remaining events to either the input
4600        // or movement method.  To do this, we will just send a repeated stream
4601        // of down and up events until we have done the complete repeatCount.
4602        // It would be nice if those interfaces had an onKeyMultiple() method,
4603        // but adding that is a more complicated change.
4604        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4605        if (which == 1) {
4606            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4607            while (--repeatCount > 0) {
4608                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4609                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4610            }
4611            hideErrorIfUnchanged();
4612
4613        } else if (which == 2) {
4614            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4615            while (--repeatCount > 0) {
4616                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4617                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4618            }
4619        }
4620
4621        return true;
4622    }
4623
4624    /**
4625     * Returns true if pressing ENTER in this field advances focus instead
4626     * of inserting the character.  This is true mostly in single-line fields,
4627     * but also in mail addresses and subjects which will display on multiple
4628     * lines but where it doesn't make sense to insert newlines.
4629     */
4630    private boolean shouldAdvanceFocusOnEnter() {
4631        if (mInput == null) {
4632            return false;
4633        }
4634
4635        if (mSingleLine) {
4636            return true;
4637        }
4638
4639        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4640            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4641            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4642                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4643                return true;
4644            }
4645        }
4646
4647        return false;
4648    }
4649
4650    /**
4651     * Returns true if pressing TAB in this field advances focus instead
4652     * of inserting the character.  Insert tabs only in multi-line editors.
4653     */
4654    private boolean shouldAdvanceFocusOnTab() {
4655        if (mInput != null && !mSingleLine) {
4656            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4657                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4658                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4659                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4660                    return false;
4661                }
4662            }
4663        }
4664        return true;
4665    }
4666
4667    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4668        if (!isEnabled()) {
4669            return 0;
4670        }
4671
4672        switch (keyCode) {
4673            case KeyEvent.KEYCODE_ENTER:
4674                mEnterKeyIsDown = true;
4675                if (event.hasNoModifiers()) {
4676                    // When mInputContentType is set, we know that we are
4677                    // running in a "modern" cupcake environment, so don't need
4678                    // to worry about the application trying to capture
4679                    // enter key events.
4680                    if (mInputContentType != null) {
4681                        // If there is an action listener, given them a
4682                        // chance to consume the event.
4683                        if (mInputContentType.onEditorActionListener != null &&
4684                                mInputContentType.onEditorActionListener.onEditorAction(
4685                                this, EditorInfo.IME_NULL, event)) {
4686                            mInputContentType.enterDown = true;
4687                            // We are consuming the enter key for them.
4688                            return -1;
4689                        }
4690                    }
4691
4692                    // If our editor should move focus when enter is pressed, or
4693                    // this is a generated event from an IME action button, then
4694                    // don't let it be inserted into the text.
4695                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4696                            || shouldAdvanceFocusOnEnter()) {
4697                        if (mOnClickListener != null) {
4698                            return 0;
4699                        }
4700                        return -1;
4701                    }
4702                }
4703                break;
4704
4705            case KeyEvent.KEYCODE_DPAD_CENTER:
4706                mDPadCenterIsDown = true;
4707                if (event.hasNoModifiers()) {
4708                    if (shouldAdvanceFocusOnEnter()) {
4709                        return 0;
4710                    }
4711                }
4712                break;
4713
4714            case KeyEvent.KEYCODE_TAB:
4715                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
4716                    if (shouldAdvanceFocusOnTab()) {
4717                        return 0;
4718                    }
4719                }
4720                break;
4721
4722                // Has to be done on key down (and not on key up) to correctly be intercepted.
4723            case KeyEvent.KEYCODE_BACK:
4724                if (mSelectionActionMode != null) {
4725                    stopSelectionActionMode();
4726                    return -1;
4727                }
4728                break;
4729        }
4730
4731        if (mInput != null) {
4732            resetErrorChangedFlag();
4733
4734            boolean doDown = true;
4735            if (otherEvent != null) {
4736                try {
4737                    beginBatchEdit();
4738                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
4739                    hideErrorIfUnchanged();
4740                    doDown = false;
4741                    if (handled) {
4742                        return -1;
4743                    }
4744                } catch (AbstractMethodError e) {
4745                    // onKeyOther was added after 1.0, so if it isn't
4746                    // implemented we need to try to dispatch as a regular down.
4747                } finally {
4748                    endBatchEdit();
4749                }
4750            }
4751
4752            if (doDown) {
4753                beginBatchEdit();
4754                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
4755                endBatchEdit();
4756                hideErrorIfUnchanged();
4757                if (handled) return 1;
4758            }
4759        }
4760
4761        // bug 650865: sometimes we get a key event before a layout.
4762        // don't try to move around if we don't know the layout.
4763
4764        if (mMovement != null && mLayout != null) {
4765            boolean doDown = true;
4766            if (otherEvent != null) {
4767                try {
4768                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4769                            otherEvent);
4770                    doDown = false;
4771                    if (handled) {
4772                        return -1;
4773                    }
4774                } catch (AbstractMethodError e) {
4775                    // onKeyOther was added after 1.0, so if it isn't
4776                    // implemented we need to try to dispatch as a regular down.
4777                }
4778            }
4779            if (doDown) {
4780                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4781                    return 2;
4782            }
4783        }
4784
4785        return 0;
4786    }
4787
4788    /**
4789     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
4790     * can be recorded.
4791     * @hide
4792     */
4793    public void resetErrorChangedFlag() {
4794        /*
4795         * Keep track of what the error was before doing the input
4796         * so that if an input filter changed the error, we leave
4797         * that error showing.  Otherwise, we take down whatever
4798         * error was showing when the user types something.
4799         */
4800        mErrorWasChanged = false;
4801    }
4802
4803    /**
4804     * @hide
4805     */
4806    public void hideErrorIfUnchanged() {
4807        if (mError != null && !mErrorWasChanged) {
4808            setError(null, null);
4809        }
4810    }
4811
4812    @Override
4813    public boolean onKeyUp(int keyCode, KeyEvent event) {
4814        if (!isEnabled()) {
4815            return super.onKeyUp(keyCode, event);
4816        }
4817
4818        switch (keyCode) {
4819            case KeyEvent.KEYCODE_DPAD_CENTER:
4820                mDPadCenterIsDown = false;
4821                if (event.hasNoModifiers()) {
4822                    /*
4823                     * If there is a click listener, just call through to
4824                     * super, which will invoke it.
4825                     *
4826                     * If there isn't a click listener, try to show the soft
4827                     * input method.  (It will also
4828                     * call performClick(), but that won't do anything in
4829                     * this case.)
4830                     */
4831                    if (mOnClickListener == null) {
4832                        if (mMovement != null && mText instanceof Editable
4833                                && mLayout != null && onCheckIsTextEditor()) {
4834                            InputMethodManager imm = InputMethodManager.peekInstance();
4835                            if (imm != null) imm.showSoftInput(this, 0);
4836                        }
4837                    }
4838                }
4839                return super.onKeyUp(keyCode, event);
4840
4841            case KeyEvent.KEYCODE_ENTER:
4842                mEnterKeyIsDown = false;
4843                if (event.hasNoModifiers()) {
4844                    if (mInputContentType != null
4845                            && mInputContentType.onEditorActionListener != null
4846                            && mInputContentType.enterDown) {
4847                        mInputContentType.enterDown = false;
4848                        if (mInputContentType.onEditorActionListener.onEditorAction(
4849                                this, EditorInfo.IME_NULL, event)) {
4850                            return true;
4851                        }
4852                    }
4853
4854                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4855                            || shouldAdvanceFocusOnEnter()) {
4856                        /*
4857                         * If there is a click listener, just call through to
4858                         * super, which will invoke it.
4859                         *
4860                         * If there isn't a click listener, try to advance focus,
4861                         * but still call through to super, which will reset the
4862                         * pressed state and longpress state.  (It will also
4863                         * call performClick(), but that won't do anything in
4864                         * this case.)
4865                         */
4866                        if (mOnClickListener == null) {
4867                            View v = focusSearch(FOCUS_DOWN);
4868
4869                            if (v != null) {
4870                                if (!v.requestFocus(FOCUS_DOWN)) {
4871                                    throw new IllegalStateException(
4872                                            "focus search returned a view " +
4873                                            "that wasn't able to take focus!");
4874                                }
4875
4876                                /*
4877                                 * Return true because we handled the key; super
4878                                 * will return false because there was no click
4879                                 * listener.
4880                                 */
4881                                super.onKeyUp(keyCode, event);
4882                                return true;
4883                            } else if ((event.getFlags()
4884                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4885                                // No target for next focus, but make sure the IME
4886                                // if this came from it.
4887                                InputMethodManager imm = InputMethodManager.peekInstance();
4888                                if (imm != null && imm.isActive(this)) {
4889                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4890                                }
4891                            }
4892                        }
4893                    }
4894                    return super.onKeyUp(keyCode, event);
4895                }
4896                break;
4897        }
4898
4899        if (mInput != null)
4900            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4901                return true;
4902
4903        if (mMovement != null && mLayout != null)
4904            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4905                return true;
4906
4907        return super.onKeyUp(keyCode, event);
4908    }
4909
4910    @Override public boolean onCheckIsTextEditor() {
4911        return mInputType != EditorInfo.TYPE_NULL;
4912    }
4913
4914    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4915        if (onCheckIsTextEditor() && isEnabled()) {
4916            if (mInputMethodState == null) {
4917                mInputMethodState = new InputMethodState();
4918            }
4919            outAttrs.inputType = mInputType;
4920            if (mInputContentType != null) {
4921                outAttrs.imeOptions = mInputContentType.imeOptions;
4922                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4923                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4924                outAttrs.actionId = mInputContentType.imeActionId;
4925                outAttrs.extras = mInputContentType.extras;
4926            } else {
4927                outAttrs.imeOptions = EditorInfo.IME_NULL;
4928            }
4929            if (focusSearch(FOCUS_DOWN) != null) {
4930                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
4931            }
4932            if (focusSearch(FOCUS_UP) != null) {
4933                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
4934            }
4935            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4936                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4937                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
4938                    // An action has not been set, but the enter key will move to
4939                    // the next focus, so set the action to that.
4940                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4941                } else {
4942                    // An action has not been set, and there is no focus to move
4943                    // to, so let's just supply a "done" action.
4944                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4945                }
4946                if (!shouldAdvanceFocusOnEnter()) {
4947                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4948                }
4949            }
4950            if (isMultilineInputType(outAttrs.inputType)) {
4951                // Multi-line text editors should always show an enter key.
4952                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4953            }
4954            outAttrs.hintText = mHint;
4955            if (mText instanceof Editable) {
4956                InputConnection ic = new EditableInputConnection(this);
4957                outAttrs.initialSelStart = getSelectionStart();
4958                outAttrs.initialSelEnd = getSelectionEnd();
4959                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4960                return ic;
4961            }
4962        }
4963        return null;
4964    }
4965
4966    /**
4967     * If this TextView contains editable content, extract a portion of it
4968     * based on the information in <var>request</var> in to <var>outText</var>.
4969     * @return Returns true if the text was successfully extracted, else false.
4970     */
4971    public boolean extractText(ExtractedTextRequest request,
4972            ExtractedText outText) {
4973        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4974                EXTRACT_UNKNOWN, outText);
4975    }
4976
4977    static final int EXTRACT_NOTHING = -2;
4978    static final int EXTRACT_UNKNOWN = -1;
4979
4980    boolean extractTextInternal(ExtractedTextRequest request,
4981            int partialStartOffset, int partialEndOffset, int delta,
4982            ExtractedText outText) {
4983        final CharSequence content = mText;
4984        if (content != null) {
4985            if (partialStartOffset != EXTRACT_NOTHING) {
4986                final int N = content.length();
4987                if (partialStartOffset < 0) {
4988                    outText.partialStartOffset = outText.partialEndOffset = -1;
4989                    partialStartOffset = 0;
4990                    partialEndOffset = N;
4991                } else {
4992                    // Now use the delta to determine the actual amount of text
4993                    // we need.
4994                    partialEndOffset += delta;
4995                    // Adjust offsets to ensure we contain full spans.
4996                    if (content instanceof Spanned) {
4997                        Spanned spanned = (Spanned)content;
4998                        Object[] spans = spanned.getSpans(partialStartOffset,
4999                                partialEndOffset, ParcelableSpan.class);
5000                        int i = spans.length;
5001                        while (i > 0) {
5002                            i--;
5003                            int j = spanned.getSpanStart(spans[i]);
5004                            if (j < partialStartOffset) partialStartOffset = j;
5005                            j = spanned.getSpanEnd(spans[i]);
5006                            if (j > partialEndOffset) partialEndOffset = j;
5007                        }
5008                    }
5009                    outText.partialStartOffset = partialStartOffset;
5010                    outText.partialEndOffset = partialEndOffset - delta;
5011
5012                    if (partialStartOffset > N) {
5013                        partialStartOffset = N;
5014                    } else if (partialStartOffset < 0) {
5015                        partialStartOffset = 0;
5016                    }
5017                    if (partialEndOffset > N) {
5018                        partialEndOffset = N;
5019                    } else if (partialEndOffset < 0) {
5020                        partialEndOffset = 0;
5021                    }
5022                }
5023                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5024                    outText.text = content.subSequence(partialStartOffset,
5025                            partialEndOffset);
5026                } else {
5027                    outText.text = TextUtils.substring(content, partialStartOffset,
5028                            partialEndOffset);
5029                }
5030            } else {
5031                outText.partialStartOffset = 0;
5032                outText.partialEndOffset = 0;
5033                outText.text = "";
5034            }
5035            outText.flags = 0;
5036            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5037                outText.flags |= ExtractedText.FLAG_SELECTING;
5038            }
5039            if (mSingleLine) {
5040                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5041            }
5042            outText.startOffset = 0;
5043            outText.selectionStart = getSelectionStart();
5044            outText.selectionEnd = getSelectionEnd();
5045            return true;
5046        }
5047        return false;
5048    }
5049
5050    boolean reportExtractedText() {
5051        final InputMethodState ims = mInputMethodState;
5052        if (ims != null) {
5053            final boolean contentChanged = ims.mContentChanged;
5054            if (contentChanged || ims.mSelectionModeChanged) {
5055                ims.mContentChanged = false;
5056                ims.mSelectionModeChanged = false;
5057                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5058                if (req != null) {
5059                    InputMethodManager imm = InputMethodManager.peekInstance();
5060                    if (imm != null) {
5061                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5062                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5063                                + " delta=" + ims.mChangedDelta);
5064                        if (ims.mChangedStart < 0 && !contentChanged) {
5065                            ims.mChangedStart = EXTRACT_NOTHING;
5066                        }
5067                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5068                                ims.mChangedDelta, ims.mTmpExtracted)) {
5069                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5070                                    + ims.mTmpExtracted.partialStartOffset
5071                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5072                                    + ": " + ims.mTmpExtracted.text);
5073                            imm.updateExtractedText(this, req.token,
5074                                    mInputMethodState.mTmpExtracted);
5075                            ims.mChangedStart = EXTRACT_UNKNOWN;
5076                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5077                            ims.mChangedDelta = 0;
5078                            ims.mContentChanged = false;
5079                            return true;
5080                        }
5081                    }
5082                }
5083            }
5084        }
5085        return false;
5086    }
5087
5088    /**
5089     * This is used to remove all style-impacting spans from text before new
5090     * extracted text is being replaced into it, so that we don't have any
5091     * lingering spans applied during the replace.
5092     */
5093    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5094        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5095        int i = spans.length;
5096        while (i > 0) {
5097            i--;
5098            spannable.removeSpan(spans[i]);
5099        }
5100    }
5101
5102    /**
5103     * Apply to this text view the given extracted text, as previously
5104     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5105     */
5106    public void setExtractedText(ExtractedText text) {
5107        Editable content = getEditableText();
5108        if (text.text != null) {
5109            if (content == null) {
5110                setText(text.text, TextView.BufferType.EDITABLE);
5111            } else if (text.partialStartOffset < 0) {
5112                removeParcelableSpans(content, 0, content.length());
5113                content.replace(0, content.length(), text.text);
5114            } else {
5115                final int N = content.length();
5116                int start = text.partialStartOffset;
5117                if (start > N) start = N;
5118                int end = text.partialEndOffset;
5119                if (end > N) end = N;
5120                removeParcelableSpans(content, start, end);
5121                content.replace(start, end, text.text);
5122            }
5123        }
5124
5125        // Now set the selection position...  make sure it is in range, to
5126        // avoid crashes.  If this is a partial update, it is possible that
5127        // the underlying text may have changed, causing us problems here.
5128        // Also we just don't want to trust clients to do the right thing.
5129        Spannable sp = (Spannable)getText();
5130        final int N = sp.length();
5131        int start = text.selectionStart;
5132        if (start < 0) start = 0;
5133        else if (start > N) start = N;
5134        int end = text.selectionEnd;
5135        if (end < 0) end = 0;
5136        else if (end > N) end = N;
5137        Selection.setSelection(sp, start, end);
5138
5139        // Finally, update the selection mode.
5140        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5141            MetaKeyKeyListener.startSelecting(this, sp);
5142        } else {
5143            MetaKeyKeyListener.stopSelecting(this, sp);
5144        }
5145    }
5146
5147    /**
5148     * @hide
5149     */
5150    public void setExtracting(ExtractedTextRequest req) {
5151        if (mInputMethodState != null) {
5152            mInputMethodState.mExtracting = req;
5153        }
5154        // This stops a possible text selection mode. Maybe not intended.
5155        hideControllers();
5156    }
5157
5158    /**
5159     * Called by the framework in response to a text completion from
5160     * the current input method, provided by it calling
5161     * {@link InputConnection#commitCompletion
5162     * InputConnection.commitCompletion()}.  The default implementation does
5163     * nothing; text views that are supporting auto-completion should override
5164     * this to do their desired behavior.
5165     *
5166     * @param text The auto complete text the user has selected.
5167     */
5168    public void onCommitCompletion(CompletionInfo text) {
5169    }
5170
5171    /**
5172     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5173     * a dictionnary) from the current input method, provided by it calling
5174     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5175     * implementation flashes the background of the corrected word to provide feedback to the user.
5176     *
5177     * @param info The auto correct info about the text that was corrected.
5178     */
5179    public void onCommitCorrection(CorrectionInfo info) {
5180        if (mCorrectionHighlighter == null) {
5181            mCorrectionHighlighter = new CorrectionHighlighter();
5182        } else {
5183            mCorrectionHighlighter.invalidate(false);
5184        }
5185
5186        mCorrectionHighlighter.highlight(info);
5187    }
5188
5189    private class CorrectionHighlighter {
5190        private final Path mPath = new Path();
5191        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5192        private int mStart, mEnd;
5193        private long mFadingStartTime;
5194        private final static int FADE_OUT_DURATION = 400;
5195
5196        public CorrectionHighlighter() {
5197            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5198            mPaint.setStyle(Paint.Style.FILL);
5199        }
5200
5201        public void highlight(CorrectionInfo info) {
5202            mStart = info.getOffset();
5203            mEnd = mStart + info.getNewText().length();
5204            mFadingStartTime = SystemClock.uptimeMillis();
5205
5206            if (mStart < 0 || mEnd < 0) {
5207                stopAnimation();
5208            }
5209        }
5210
5211        public void draw(Canvas canvas, int cursorOffsetVertical) {
5212            if (updatePath() && updatePaint()) {
5213                if (cursorOffsetVertical != 0) {
5214                    canvas.translate(0, cursorOffsetVertical);
5215                }
5216
5217                canvas.drawPath(mPath, mPaint);
5218
5219                if (cursorOffsetVertical != 0) {
5220                    canvas.translate(0, -cursorOffsetVertical);
5221                }
5222                invalidate(true);
5223            } else {
5224                stopAnimation();
5225                invalidate(false);
5226            }
5227        }
5228
5229        private boolean updatePaint() {
5230            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5231            if (duration > FADE_OUT_DURATION) return false;
5232
5233            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5234            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5235            final int color = (mHighlightColor & 0x00FFFFFF) +
5236                    ((int) (highlightColorAlpha * coef) << 24);
5237            mPaint.setColor(color);
5238            return true;
5239        }
5240
5241        private boolean updatePath() {
5242            final Layout layout = TextView.this.mLayout;
5243            if (layout == null) return false;
5244
5245            // Update in case text is edited while the animation is run
5246            final int length = mText.length();
5247            int start = Math.min(length, mStart);
5248            int end = Math.min(length, mEnd);
5249
5250            mPath.reset();
5251            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5252            return true;
5253        }
5254
5255        private void invalidate(boolean delayed) {
5256            if (TextView.this.mLayout == null) return;
5257
5258            synchronized (sTempRect) {
5259                mPath.computeBounds(sTempRect, false);
5260
5261                int left = getCompoundPaddingLeft();
5262                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5263
5264                if (delayed) {
5265                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5266                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5267                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5268                } else {
5269                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5270                            (int) sTempRect.right, (int) sTempRect.bottom);
5271                }
5272            }
5273        }
5274
5275        private void stopAnimation() {
5276            TextView.this.mCorrectionHighlighter = null;
5277        }
5278    }
5279
5280    public void beginBatchEdit() {
5281        mInBatchEditControllers = true;
5282        final InputMethodState ims = mInputMethodState;
5283        if (ims != null) {
5284            int nesting = ++ims.mBatchEditNesting;
5285            if (nesting == 1) {
5286                ims.mCursorChanged = false;
5287                ims.mChangedDelta = 0;
5288                if (ims.mContentChanged) {
5289                    // We already have a pending change from somewhere else,
5290                    // so turn this into a full update.
5291                    ims.mChangedStart = 0;
5292                    ims.mChangedEnd = mText.length();
5293                } else {
5294                    ims.mChangedStart = EXTRACT_UNKNOWN;
5295                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5296                    ims.mContentChanged = false;
5297                }
5298                onBeginBatchEdit();
5299            }
5300        }
5301    }
5302
5303    public void endBatchEdit() {
5304        mInBatchEditControllers = false;
5305        final InputMethodState ims = mInputMethodState;
5306        if (ims != null) {
5307            int nesting = --ims.mBatchEditNesting;
5308            if (nesting == 0) {
5309                finishBatchEdit(ims);
5310            }
5311        }
5312    }
5313
5314    void ensureEndedBatchEdit() {
5315        final InputMethodState ims = mInputMethodState;
5316        if (ims != null && ims.mBatchEditNesting != 0) {
5317            ims.mBatchEditNesting = 0;
5318            finishBatchEdit(ims);
5319        }
5320    }
5321
5322    void finishBatchEdit(final InputMethodState ims) {
5323        onEndBatchEdit();
5324
5325        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5326            updateAfterEdit();
5327            reportExtractedText();
5328        } else if (ims.mCursorChanged) {
5329            // Cheezy way to get us to report the current cursor location.
5330            invalidateCursor();
5331        }
5332    }
5333
5334    void updateAfterEdit() {
5335        invalidate();
5336        int curs = getSelectionStart();
5337
5338        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
5339                             Gravity.BOTTOM) {
5340            registerForPreDraw();
5341        }
5342
5343        if (curs >= 0) {
5344            mHighlightPathBogus = true;
5345
5346            if (isFocused()) {
5347                mShowCursor = SystemClock.uptimeMillis();
5348                makeBlink();
5349            }
5350        }
5351
5352        checkForResize();
5353    }
5354
5355    /**
5356     * Called by the framework in response to a request to begin a batch
5357     * of edit operations through a call to link {@link #beginBatchEdit()}.
5358     */
5359    public void onBeginBatchEdit() {
5360    }
5361
5362    /**
5363     * Called by the framework in response to a request to end a batch
5364     * of edit operations through a call to link {@link #endBatchEdit}.
5365     */
5366    public void onEndBatchEdit() {
5367    }
5368
5369    /**
5370     * Called by the framework in response to a private command from the
5371     * current method, provided by it calling
5372     * {@link InputConnection#performPrivateCommand
5373     * InputConnection.performPrivateCommand()}.
5374     *
5375     * @param action The action name of the command.
5376     * @param data Any additional data for the command.  This may be null.
5377     * @return Return true if you handled the command, else false.
5378     */
5379    public boolean onPrivateIMECommand(String action, Bundle data) {
5380        return false;
5381    }
5382
5383    private void nullLayouts() {
5384        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5385            mSavedLayout = (BoringLayout) mLayout;
5386        }
5387        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5388            mSavedHintLayout = (BoringLayout) mHintLayout;
5389        }
5390
5391        mLayout = mHintLayout = null;
5392
5393        // Since it depends on the value of mLayout
5394        prepareCursorControllers();
5395    }
5396
5397    /**
5398     * Make a new Layout based on the already-measured size of the view,
5399     * on the assumption that it was measured correctly at some point.
5400     */
5401    private void assumeLayout() {
5402        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5403
5404        if (width < 1) {
5405            width = 0;
5406        }
5407
5408        int physicalWidth = width;
5409
5410        if (mHorizontallyScrolling) {
5411            width = VERY_WIDE;
5412        }
5413
5414        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5415                      physicalWidth, false);
5416    }
5417
5418    /**
5419     * The width passed in is now the desired layout width,
5420     * not the full view width with padding.
5421     * {@hide}
5422     */
5423    protected void makeNewLayout(int w, int hintWidth,
5424                                 BoringLayout.Metrics boring,
5425                                 BoringLayout.Metrics hintBoring,
5426                                 int ellipsisWidth, boolean bringIntoView) {
5427        stopMarquee();
5428
5429        mHighlightPathBogus = true;
5430
5431        if (w < 0) {
5432            w = 0;
5433        }
5434        if (hintWidth < 0) {
5435            hintWidth = 0;
5436        }
5437
5438        Layout.Alignment alignment;
5439        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
5440            case Gravity.CENTER_HORIZONTAL:
5441                alignment = Layout.Alignment.ALIGN_CENTER;
5442                break;
5443
5444            case Gravity.RIGHT:
5445                // Note, Layout resolves ALIGN_OPPOSITE to left or
5446                // right based on the paragraph direction.
5447                alignment = Layout.Alignment.ALIGN_OPPOSITE;
5448                break;
5449
5450            default:
5451                alignment = Layout.Alignment.ALIGN_NORMAL;
5452        }
5453
5454        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5455
5456        if (mText instanceof Spannable) {
5457            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5458                    alignment, mSpacingMult,
5459                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5460                    ellipsisWidth);
5461        } else {
5462            if (boring == UNKNOWN_BORING) {
5463                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
5464                                               mBoring);
5465                if (boring != null) {
5466                    mBoring = boring;
5467                }
5468            }
5469
5470            if (boring != null) {
5471                if (boring.width <= w &&
5472                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
5473                    if (mSavedLayout != null) {
5474                        mLayout = mSavedLayout.
5475                                replaceOrMake(mTransformed, mTextPaint,
5476                                w, alignment, mSpacingMult, mSpacingAdd,
5477                                boring, mIncludePad);
5478                    } else {
5479                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5480                                w, alignment, mSpacingMult, mSpacingAdd,
5481                                boring, mIncludePad);
5482                    }
5483
5484                    mSavedLayout = (BoringLayout) mLayout;
5485                } else if (shouldEllipsize && boring.width <= w) {
5486                    if (mSavedLayout != null) {
5487                        mLayout = mSavedLayout.
5488                                replaceOrMake(mTransformed, mTextPaint,
5489                                w, alignment, mSpacingMult, mSpacingAdd,
5490                                boring, mIncludePad, mEllipsize,
5491                                ellipsisWidth);
5492                    } else {
5493                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5494                                w, alignment, mSpacingMult, mSpacingAdd,
5495                                boring, mIncludePad, mEllipsize,
5496                                ellipsisWidth);
5497                    }
5498                } else if (shouldEllipsize) {
5499                    mLayout = new StaticLayout(mTransformed,
5500                                0, mTransformed.length(),
5501                                mTextPaint, w, alignment, mSpacingMult,
5502                                mSpacingAdd, mIncludePad, mEllipsize,
5503                                ellipsisWidth);
5504                } else {
5505                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5506                            w, alignment, mSpacingMult, mSpacingAdd,
5507                            mIncludePad);
5508                }
5509            } else if (shouldEllipsize) {
5510                mLayout = new StaticLayout(mTransformed,
5511                            0, mTransformed.length(),
5512                            mTextPaint, w, alignment, mSpacingMult,
5513                            mSpacingAdd, mIncludePad, mEllipsize,
5514                            ellipsisWidth);
5515            } else {
5516                mLayout = new StaticLayout(mTransformed, mTextPaint,
5517                        w, alignment, mSpacingMult, mSpacingAdd,
5518                        mIncludePad);
5519            }
5520        }
5521
5522        shouldEllipsize = mEllipsize != null;
5523        mHintLayout = null;
5524
5525        if (mHint != null) {
5526            if (shouldEllipsize) hintWidth = w;
5527
5528            if (hintBoring == UNKNOWN_BORING) {
5529                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5530                                                   mHintBoring);
5531                if (hintBoring != null) {
5532                    mHintBoring = hintBoring;
5533                }
5534            }
5535
5536            if (hintBoring != null) {
5537                if (hintBoring.width <= hintWidth &&
5538                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5539                    if (mSavedHintLayout != null) {
5540                        mHintLayout = mSavedHintLayout.
5541                                replaceOrMake(mHint, mTextPaint,
5542                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5543                                hintBoring, mIncludePad);
5544                    } else {
5545                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5546                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5547                                hintBoring, mIncludePad);
5548                    }
5549
5550                    mSavedHintLayout = (BoringLayout) mHintLayout;
5551                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5552                    if (mSavedHintLayout != null) {
5553                        mHintLayout = mSavedHintLayout.
5554                                replaceOrMake(mHint, mTextPaint,
5555                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5556                                hintBoring, mIncludePad, mEllipsize,
5557                                ellipsisWidth);
5558                    } else {
5559                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5560                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5561                                hintBoring, mIncludePad, mEllipsize,
5562                                ellipsisWidth);
5563                    }
5564                } else if (shouldEllipsize) {
5565                    mHintLayout = new StaticLayout(mHint,
5566                                0, mHint.length(),
5567                                mTextPaint, hintWidth, alignment, mSpacingMult,
5568                                mSpacingAdd, mIncludePad, mEllipsize,
5569                                ellipsisWidth);
5570                } else {
5571                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5572                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5573                            mIncludePad);
5574                }
5575            } else if (shouldEllipsize) {
5576                mHintLayout = new StaticLayout(mHint,
5577                            0, mHint.length(),
5578                            mTextPaint, hintWidth, alignment, mSpacingMult,
5579                            mSpacingAdd, mIncludePad, mEllipsize,
5580                            ellipsisWidth);
5581            } else {
5582                mHintLayout = new StaticLayout(mHint, mTextPaint,
5583                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5584                        mIncludePad);
5585            }
5586        }
5587
5588        if (bringIntoView) {
5589            registerForPreDraw();
5590        }
5591
5592        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5593            if (!compressText(ellipsisWidth)) {
5594                final int height = mLayoutParams.height;
5595                // If the size of the view does not depend on the size of the text, try to
5596                // start the marquee immediately
5597                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5598                    startMarquee();
5599                } else {
5600                    // Defer the start of the marquee until we know our width (see setFrame())
5601                    mRestartMarquee = true;
5602                }
5603            }
5604        }
5605
5606        // CursorControllers need a non-null mLayout
5607        prepareCursorControllers();
5608    }
5609
5610    private boolean compressText(float width) {
5611        if (isHardwareAccelerated()) return false;
5612
5613        // Only compress the text if it hasn't been compressed by the previous pass
5614        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5615                mTextPaint.getTextScaleX() == 1.0f) {
5616            final float textWidth = mLayout.getLineWidth(0);
5617            final float overflow = (textWidth + 1.0f - width) / width;
5618            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5619                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5620                post(new Runnable() {
5621                    public void run() {
5622                        requestLayout();
5623                    }
5624                });
5625                return true;
5626            }
5627        }
5628
5629        return false;
5630    }
5631
5632    private static int desired(Layout layout) {
5633        int n = layout.getLineCount();
5634        CharSequence text = layout.getText();
5635        float max = 0;
5636
5637        // if any line was wrapped, we can't use it.
5638        // but it's ok for the last line not to have a newline
5639
5640        for (int i = 0; i < n - 1; i++) {
5641            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5642                return -1;
5643        }
5644
5645        for (int i = 0; i < n; i++) {
5646            max = Math.max(max, layout.getLineWidth(i));
5647        }
5648
5649        return (int) FloatMath.ceil(max);
5650    }
5651
5652    /**
5653     * Set whether the TextView includes extra top and bottom padding to make
5654     * room for accents that go above the normal ascent and descent.
5655     * The default is true.
5656     *
5657     * @attr ref android.R.styleable#TextView_includeFontPadding
5658     */
5659    public void setIncludeFontPadding(boolean includepad) {
5660        mIncludePad = includepad;
5661
5662        if (mLayout != null) {
5663            nullLayouts();
5664            requestLayout();
5665            invalidate();
5666        }
5667    }
5668
5669    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5670
5671    @Override
5672    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5673        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5674        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5675        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5676        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5677
5678        int width;
5679        int height;
5680
5681        BoringLayout.Metrics boring = UNKNOWN_BORING;
5682        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5683
5684        int des = -1;
5685        boolean fromexisting = false;
5686
5687        if (widthMode == MeasureSpec.EXACTLY) {
5688            // Parent has told us how big to be. So be it.
5689            width = widthSize;
5690        } else {
5691            if (mLayout != null && mEllipsize == null) {
5692                des = desired(mLayout);
5693            }
5694
5695            if (des < 0) {
5696                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5697                if (boring != null) {
5698                    mBoring = boring;
5699                }
5700            } else {
5701                fromexisting = true;
5702            }
5703
5704            if (boring == null || boring == UNKNOWN_BORING) {
5705                if (des < 0) {
5706                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5707                }
5708
5709                width = des;
5710            } else {
5711                width = boring.width;
5712            }
5713
5714            final Drawables dr = mDrawables;
5715            if (dr != null) {
5716                width = Math.max(width, dr.mDrawableWidthTop);
5717                width = Math.max(width, dr.mDrawableWidthBottom);
5718            }
5719
5720            if (mHint != null) {
5721                int hintDes = -1;
5722                int hintWidth;
5723
5724                if (mHintLayout != null && mEllipsize == null) {
5725                    hintDes = desired(mHintLayout);
5726                }
5727
5728                if (hintDes < 0) {
5729                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5730                    if (hintBoring != null) {
5731                        mHintBoring = hintBoring;
5732                    }
5733                }
5734
5735                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5736                    if (hintDes < 0) {
5737                        hintDes = (int) FloatMath.ceil(
5738                                Layout.getDesiredWidth(mHint, mTextPaint));
5739                    }
5740
5741                    hintWidth = hintDes;
5742                } else {
5743                    hintWidth = hintBoring.width;
5744                }
5745
5746                if (hintWidth > width) {
5747                    width = hintWidth;
5748                }
5749            }
5750
5751            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5752
5753            if (mMaxWidthMode == EMS) {
5754                width = Math.min(width, mMaxWidth * getLineHeight());
5755            } else {
5756                width = Math.min(width, mMaxWidth);
5757            }
5758
5759            if (mMinWidthMode == EMS) {
5760                width = Math.max(width, mMinWidth * getLineHeight());
5761            } else {
5762                width = Math.max(width, mMinWidth);
5763            }
5764
5765            // Check against our minimum width
5766            width = Math.max(width, getSuggestedMinimumWidth());
5767
5768            if (widthMode == MeasureSpec.AT_MOST) {
5769                width = Math.min(widthSize, width);
5770            }
5771        }
5772
5773        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5774        int unpaddedWidth = want;
5775        int hintWant = want;
5776
5777        if (mHorizontallyScrolling)
5778            want = VERY_WIDE;
5779
5780        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5781
5782        if (mLayout == null) {
5783            makeNewLayout(want, hintWant, boring, hintBoring,
5784                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5785        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5786                   (mLayout.getEllipsizedWidth() !=
5787                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5788            if (mHint == null && mEllipsize == null &&
5789                    want > mLayout.getWidth() &&
5790                    (mLayout instanceof BoringLayout ||
5791                            (fromexisting && des >= 0 && des <= want))) {
5792                mLayout.increaseWidthTo(want);
5793            } else {
5794                makeNewLayout(want, hintWant, boring, hintBoring,
5795                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5796            }
5797        } else {
5798            // Width has not changed.
5799        }
5800
5801        if (heightMode == MeasureSpec.EXACTLY) {
5802            // Parent has told us how big to be. So be it.
5803            height = heightSize;
5804            mDesiredHeightAtMeasure = -1;
5805        } else {
5806            int desired = getDesiredHeight();
5807
5808            height = desired;
5809            mDesiredHeightAtMeasure = desired;
5810
5811            if (heightMode == MeasureSpec.AT_MOST) {
5812                height = Math.min(desired, heightSize);
5813            }
5814        }
5815
5816        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5817        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5818            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5819        }
5820
5821        /*
5822         * We didn't let makeNewLayout() register to bring the cursor into view,
5823         * so do it here if there is any possibility that it is needed.
5824         */
5825        if (mMovement != null ||
5826            mLayout.getWidth() > unpaddedWidth ||
5827            mLayout.getHeight() > unpaddedHeight) {
5828            registerForPreDraw();
5829        } else {
5830            scrollTo(0, 0);
5831        }
5832
5833        setMeasuredDimension(width, height);
5834    }
5835
5836    private int getDesiredHeight() {
5837        return Math.max(
5838                getDesiredHeight(mLayout, true),
5839                getDesiredHeight(mHintLayout, mEllipsize != null));
5840    }
5841
5842    private int getDesiredHeight(Layout layout, boolean cap) {
5843        if (layout == null) {
5844            return 0;
5845        }
5846
5847        int linecount = layout.getLineCount();
5848        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5849        int desired = layout.getLineTop(linecount);
5850
5851        final Drawables dr = mDrawables;
5852        if (dr != null) {
5853            desired = Math.max(desired, dr.mDrawableHeightLeft);
5854            desired = Math.max(desired, dr.mDrawableHeightRight);
5855        }
5856
5857        desired += pad;
5858
5859        if (mMaxMode == LINES) {
5860            /*
5861             * Don't cap the hint to a certain number of lines.
5862             * (Do cap it, though, if we have a maximum pixel height.)
5863             */
5864            if (cap) {
5865                if (linecount > mMaximum) {
5866                    desired = layout.getLineTop(mMaximum) +
5867                              layout.getBottomPadding();
5868
5869                    if (dr != null) {
5870                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5871                        desired = Math.max(desired, dr.mDrawableHeightRight);
5872                    }
5873
5874                    desired += pad;
5875                    linecount = mMaximum;
5876                }
5877            }
5878        } else {
5879            desired = Math.min(desired, mMaximum);
5880        }
5881
5882        if (mMinMode == LINES) {
5883            if (linecount < mMinimum) {
5884                desired += getLineHeight() * (mMinimum - linecount);
5885            }
5886        } else {
5887            desired = Math.max(desired, mMinimum);
5888        }
5889
5890        // Check against our minimum height
5891        desired = Math.max(desired, getSuggestedMinimumHeight());
5892
5893        return desired;
5894    }
5895
5896    /**
5897     * Check whether a change to the existing text layout requires a
5898     * new view layout.
5899     */
5900    private void checkForResize() {
5901        boolean sizeChanged = false;
5902
5903        if (mLayout != null) {
5904            // Check if our width changed
5905            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5906                sizeChanged = true;
5907                invalidate();
5908            }
5909
5910            // Check if our height changed
5911            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5912                int desiredHeight = getDesiredHeight();
5913
5914                if (desiredHeight != this.getHeight()) {
5915                    sizeChanged = true;
5916                }
5917            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5918                if (mDesiredHeightAtMeasure >= 0) {
5919                    int desiredHeight = getDesiredHeight();
5920
5921                    if (desiredHeight != mDesiredHeightAtMeasure) {
5922                        sizeChanged = true;
5923                    }
5924                }
5925            }
5926        }
5927
5928        if (sizeChanged) {
5929            requestLayout();
5930            // caller will have already invalidated
5931        }
5932    }
5933
5934    /**
5935     * Check whether entirely new text requires a new view layout
5936     * or merely a new text layout.
5937     */
5938    private void checkForRelayout() {
5939        // If we have a fixed width, we can just swap in a new text layout
5940        // if the text height stays the same or if the view height is fixed.
5941
5942        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5943                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5944                (mHint == null || mHintLayout != null) &&
5945                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5946            // Static width, so try making a new text layout.
5947
5948            int oldht = mLayout.getHeight();
5949            int want = mLayout.getWidth();
5950            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5951
5952            /*
5953             * No need to bring the text into view, since the size is not
5954             * changing (unless we do the requestLayout(), in which case it
5955             * will happen at measure).
5956             */
5957            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5958                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5959                          false);
5960
5961            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5962                // In a fixed-height view, so use our new text layout.
5963                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5964                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5965                    invalidate();
5966                    return;
5967                }
5968
5969                // Dynamic height, but height has stayed the same,
5970                // so use our new text layout.
5971                if (mLayout.getHeight() == oldht &&
5972                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5973                    invalidate();
5974                    return;
5975                }
5976            }
5977
5978            // We lose: the height has changed and we have a dynamic height.
5979            // Request a new view layout using our new text layout.
5980            requestLayout();
5981            invalidate();
5982        } else {
5983            // Dynamic width, so we have no choice but to request a new
5984            // view layout with a new text layout.
5985
5986            nullLayouts();
5987            requestLayout();
5988            invalidate();
5989        }
5990    }
5991
5992    /**
5993     * Returns true if anything changed.
5994     */
5995    private boolean bringTextIntoView() {
5996        int line = 0;
5997        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5998            line = mLayout.getLineCount() - 1;
5999        }
6000
6001        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6002        int dir = mLayout.getParagraphDirection(line);
6003        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6004        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6005        int ht = mLayout.getHeight();
6006
6007        int scrollx, scrolly;
6008
6009        if (a == Layout.Alignment.ALIGN_CENTER) {
6010            /*
6011             * Keep centered if possible, or, if it is too wide to fit,
6012             * keep leading edge in view.
6013             */
6014
6015            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6016            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6017
6018            if (right - left < hspace) {
6019                scrollx = (right + left) / 2 - hspace / 2;
6020            } else {
6021                if (dir < 0) {
6022                    scrollx = right - hspace;
6023                } else {
6024                    scrollx = left;
6025                }
6026            }
6027        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
6028            /*
6029             * Keep leading edge in view.
6030             */
6031
6032            if (dir < 0) {
6033                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6034                scrollx = right - hspace;
6035            } else {
6036                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6037            }
6038        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
6039            /*
6040             * Keep trailing edge in view.
6041             */
6042
6043            if (dir < 0) {
6044                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6045            } else {
6046                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6047                scrollx = right - hspace;
6048            }
6049        }
6050
6051        if (ht < vspace) {
6052            scrolly = 0;
6053        } else {
6054            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6055                scrolly = ht - vspace;
6056            } else {
6057                scrolly = 0;
6058            }
6059        }
6060
6061        if (scrollx != mScrollX || scrolly != mScrollY) {
6062            scrollTo(scrollx, scrolly);
6063            return true;
6064        } else {
6065            return false;
6066        }
6067    }
6068
6069    /**
6070     * Move the point, specified by the offset, into the view if it is needed.
6071     * This has to be called after layout. Returns true if anything changed.
6072     */
6073    public boolean bringPointIntoView(int offset) {
6074        boolean changed = false;
6075
6076        int line = mLayout.getLineForOffset(offset);
6077
6078        // FIXME: Is it okay to truncate this, or should we round?
6079        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6080        final int top = mLayout.getLineTop(line);
6081        final int bottom = mLayout.getLineTop(line + 1);
6082
6083        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6084        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6085        int ht = mLayout.getHeight();
6086
6087        int grav;
6088
6089        switch (mLayout.getParagraphAlignment(line)) {
6090            case ALIGN_NORMAL:
6091                grav = 1;
6092                break;
6093
6094            case ALIGN_OPPOSITE:
6095                grav = -1;
6096                break;
6097
6098            default:
6099                grav = 0;
6100        }
6101
6102        grav *= mLayout.getParagraphDirection(line);
6103
6104        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6105        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6106
6107        int hslack = (bottom - top) / 2;
6108        int vslack = hslack;
6109
6110        if (vslack > vspace / 4)
6111            vslack = vspace / 4;
6112        if (hslack > hspace / 4)
6113            hslack = hspace / 4;
6114
6115        int hs = mScrollX;
6116        int vs = mScrollY;
6117
6118        if (top - vs < vslack)
6119            vs = top - vslack;
6120        if (bottom - vs > vspace - vslack)
6121            vs = bottom - (vspace - vslack);
6122        if (ht - vs < vspace)
6123            vs = ht - vspace;
6124        if (0 - vs > 0)
6125            vs = 0;
6126
6127        if (grav != 0) {
6128            if (x - hs < hslack) {
6129                hs = x - hslack;
6130            }
6131            if (x - hs > hspace - hslack) {
6132                hs = x - (hspace - hslack);
6133            }
6134        }
6135
6136        if (grav < 0) {
6137            if (left - hs > 0)
6138                hs = left;
6139            if (right - hs < hspace)
6140                hs = right - hspace;
6141        } else if (grav > 0) {
6142            if (right - hs < hspace)
6143                hs = right - hspace;
6144            if (left - hs > 0)
6145                hs = left;
6146        } else /* grav == 0 */ {
6147            if (right - left <= hspace) {
6148                /*
6149                 * If the entire text fits, center it exactly.
6150                 */
6151                hs = left - (hspace - (right - left)) / 2;
6152            } else if (x > right - hslack) {
6153                /*
6154                 * If we are near the right edge, keep the right edge
6155                 * at the edge of the view.
6156                 */
6157                hs = right - hspace;
6158            } else if (x < left + hslack) {
6159                /*
6160                 * If we are near the left edge, keep the left edge
6161                 * at the edge of the view.
6162                 */
6163                hs = left;
6164            } else if (left > hs) {
6165                /*
6166                 * Is there whitespace visible at the left?  Fix it if so.
6167                 */
6168                hs = left;
6169            } else if (right < hs + hspace) {
6170                /*
6171                 * Is there whitespace visible at the right?  Fix it if so.
6172                 */
6173                hs = right - hspace;
6174            } else {
6175                /*
6176                 * Otherwise, float as needed.
6177                 */
6178                if (x - hs < hslack) {
6179                    hs = x - hslack;
6180                }
6181                if (x - hs > hspace - hslack) {
6182                    hs = x - (hspace - hslack);
6183                }
6184            }
6185        }
6186
6187        if (hs != mScrollX || vs != mScrollY) {
6188            if (mScroller == null) {
6189                scrollTo(hs, vs);
6190            } else {
6191                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6192                int dx = hs - mScrollX;
6193                int dy = vs - mScrollY;
6194
6195                if (duration > ANIMATED_SCROLL_GAP) {
6196                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6197                    awakenScrollBars(mScroller.getDuration());
6198                    invalidate();
6199                } else {
6200                    if (!mScroller.isFinished()) {
6201                        mScroller.abortAnimation();
6202                    }
6203
6204                    scrollBy(dx, dy);
6205                }
6206
6207                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6208            }
6209
6210            changed = true;
6211        }
6212
6213        if (isFocused()) {
6214            // This offsets because getInterestingRect() is in terms of
6215            // viewport coordinates, but requestRectangleOnScreen()
6216            // is in terms of content coordinates.
6217
6218            Rect r = new Rect(x, top, x + 1, bottom);
6219            getInterestingRect(r, line);
6220            r.offset(mScrollX, mScrollY);
6221
6222            if (requestRectangleOnScreen(r)) {
6223                changed = true;
6224            }
6225        }
6226
6227        return changed;
6228    }
6229
6230    /**
6231     * Move the cursor, if needed, so that it is at an offset that is visible
6232     * to the user.  This will not move the cursor if it represents more than
6233     * one character (a selection range).  This will only work if the
6234     * TextView contains spannable text; otherwise it will do nothing.
6235     *
6236     * @return True if the cursor was actually moved, false otherwise.
6237     */
6238    public boolean moveCursorToVisibleOffset() {
6239        if (!(mText instanceof Spannable)) {
6240            return false;
6241        }
6242        int start = getSelectionStart();
6243        int end = getSelectionEnd();
6244        if (start != end) {
6245            return false;
6246        }
6247
6248        // First: make sure the line is visible on screen:
6249
6250        int line = mLayout.getLineForOffset(start);
6251
6252        final int top = mLayout.getLineTop(line);
6253        final int bottom = mLayout.getLineTop(line + 1);
6254        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6255        int vslack = (bottom - top) / 2;
6256        if (vslack > vspace / 4)
6257            vslack = vspace / 4;
6258        final int vs = mScrollY;
6259
6260        if (top < (vs+vslack)) {
6261            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6262        } else if (bottom > (vspace+vs-vslack)) {
6263            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6264        }
6265
6266        // Next: make sure the character is visible on screen:
6267
6268        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6269        final int hs = mScrollX;
6270        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6271        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6272
6273        // line might contain bidirectional text
6274        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6275        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6276
6277        int newStart = start;
6278        if (newStart < lowChar) {
6279            newStart = lowChar;
6280        } else if (newStart > highChar) {
6281            newStart = highChar;
6282        }
6283
6284        if (newStart != start) {
6285            Selection.setSelection((Spannable)mText, newStart);
6286            return true;
6287        }
6288
6289        return false;
6290    }
6291
6292    @Override
6293    public void computeScroll() {
6294        if (mScroller != null) {
6295            if (mScroller.computeScrollOffset()) {
6296                mScrollX = mScroller.getCurrX();
6297                mScrollY = mScroller.getCurrY();
6298                invalidateParentCaches();
6299                postInvalidate();  // So we draw again
6300            }
6301        }
6302    }
6303
6304    private void getInterestingRect(Rect r, int line) {
6305        convertFromViewportToContentCoordinates(r);
6306
6307        // Rectangle can can be expanded on first and last line to take
6308        // padding into account.
6309        // TODO Take left/right padding into account too?
6310        if (line == 0) r.top -= getExtendedPaddingTop();
6311        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6312    }
6313
6314    private void convertFromViewportToContentCoordinates(Rect r) {
6315        final int horizontalOffset = viewportToContentHorizontalOffset();
6316        r.left += horizontalOffset;
6317        r.right += horizontalOffset;
6318
6319        final int verticalOffset = viewportToContentVerticalOffset();
6320        r.top += verticalOffset;
6321        r.bottom += verticalOffset;
6322    }
6323
6324    private int viewportToContentHorizontalOffset() {
6325        return getCompoundPaddingLeft() - mScrollX;
6326    }
6327
6328    private int viewportToContentVerticalOffset() {
6329        int offset = getExtendedPaddingTop() - mScrollY;
6330        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6331            offset += getVerticalOffset(false);
6332        }
6333        return offset;
6334    }
6335
6336    @Override
6337    public void debug(int depth) {
6338        super.debug(depth);
6339
6340        String output = debugIndent(depth);
6341        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6342                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6343                + "} ";
6344
6345        if (mText != null) {
6346
6347            output += "mText=\"" + mText + "\" ";
6348            if (mLayout != null) {
6349                output += "mLayout width=" + mLayout.getWidth()
6350                        + " height=" + mLayout.getHeight();
6351            }
6352        } else {
6353            output += "mText=NULL";
6354        }
6355        Log.d(VIEW_LOG_TAG, output);
6356    }
6357
6358    /**
6359     * Convenience for {@link Selection#getSelectionStart}.
6360     */
6361    @ViewDebug.ExportedProperty(category = "text")
6362    public int getSelectionStart() {
6363        return Selection.getSelectionStart(getText());
6364    }
6365
6366    /**
6367     * Convenience for {@link Selection#getSelectionEnd}.
6368     */
6369    @ViewDebug.ExportedProperty(category = "text")
6370    public int getSelectionEnd() {
6371        return Selection.getSelectionEnd(getText());
6372    }
6373
6374    /**
6375     * Return true iff there is a selection inside this text view.
6376     */
6377    public boolean hasSelection() {
6378        final int selectionStart = getSelectionStart();
6379        final int selectionEnd = getSelectionEnd();
6380
6381        return selectionStart >= 0 && selectionStart != selectionEnd;
6382    }
6383
6384    /**
6385     * Sets the properties of this field (lines, horizontally scrolling,
6386     * transformation method) to be for a single-line input.
6387     *
6388     * @attr ref android.R.styleable#TextView_singleLine
6389     */
6390    public void setSingleLine() {
6391        setSingleLine(true);
6392    }
6393
6394    /**
6395     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6396     * transformation method) to be for a single-line input; if false, restores these to the default
6397     * conditions.
6398     *
6399     * Note that the default conditions are not necessarily those that were in effect prior this
6400     * method, and you may want to reset these properties to your custom values.
6401     *
6402     * @attr ref android.R.styleable#TextView_singleLine
6403     */
6404    @android.view.RemotableViewMethod
6405    public void setSingleLine(boolean singleLine) {
6406        // Could be used, but may break backward compatibility.
6407        // if (mSingleLine == singleLine) return;
6408        setInputTypeSingleLine(singleLine);
6409        applySingleLine(singleLine, true, true);
6410    }
6411
6412    /**
6413     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6414     * @param singleLine
6415     */
6416    private void setInputTypeSingleLine(boolean singleLine) {
6417        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6418            if (singleLine) {
6419                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6420            } else {
6421                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6422            }
6423        }
6424    }
6425
6426    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6427            boolean changeMaxLines) {
6428        mSingleLine = singleLine;
6429        if (singleLine) {
6430            setLines(1);
6431            setHorizontallyScrolling(true);
6432            if (applyTransformation) {
6433                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6434            }
6435            // TODO setState
6436        } else {
6437            if (changeMaxLines) {
6438                setMaxLines(Integer.MAX_VALUE);
6439            }
6440            setHorizontallyScrolling(false);
6441            if (applyTransformation) {
6442                setTransformationMethod(null);
6443            }
6444            // TODO setState
6445        }
6446    }
6447
6448    /**
6449     * Causes words in the text that are longer than the view is wide
6450     * to be ellipsized instead of broken in the middle.  You may also
6451     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6452     * to constrain the text to a single line.  Use <code>null</code>
6453     * to turn off ellipsizing.
6454     *
6455     * @attr ref android.R.styleable#TextView_ellipsize
6456     */
6457    public void setEllipsize(TextUtils.TruncateAt where) {
6458        mEllipsize = where;
6459
6460        if (mLayout != null) {
6461            nullLayouts();
6462            requestLayout();
6463            invalidate();
6464        }
6465    }
6466
6467    /**
6468     * Sets how many times to repeat the marquee animation. Only applied if the
6469     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6470     *
6471     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6472     */
6473    public void setMarqueeRepeatLimit(int marqueeLimit) {
6474        mMarqueeRepeatLimit = marqueeLimit;
6475    }
6476
6477    /**
6478     * Returns where, if anywhere, words that are longer than the view
6479     * is wide should be ellipsized.
6480     */
6481    @ViewDebug.ExportedProperty
6482    public TextUtils.TruncateAt getEllipsize() {
6483        return mEllipsize;
6484    }
6485
6486    /**
6487     * Set the TextView so that when it takes focus, all the text is
6488     * selected.
6489     *
6490     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6491     */
6492    @android.view.RemotableViewMethod
6493    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6494        mSelectAllOnFocus = selectAllOnFocus;
6495
6496        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6497            setText(mText, BufferType.SPANNABLE);
6498        }
6499    }
6500
6501    /**
6502     * Set whether the cursor is visible.  The default is true.
6503     *
6504     * @attr ref android.R.styleable#TextView_cursorVisible
6505     */
6506    @android.view.RemotableViewMethod
6507    public void setCursorVisible(boolean visible) {
6508        mCursorVisible = visible;
6509        invalidate();
6510
6511        makeBlink();
6512
6513        // InsertionPointCursorController depends on mCursorVisible
6514        prepareCursorControllers();
6515    }
6516
6517    private boolean isCursorVisible() {
6518        return mCursorVisible && isTextEditable();
6519    }
6520
6521    private boolean canMarquee() {
6522        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6523        return width > 0 && mLayout.getLineWidth(0) > width;
6524    }
6525
6526    private void startMarquee() {
6527        // Do not ellipsize EditText
6528        if (mInput != null) return;
6529
6530        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6531            return;
6532        }
6533
6534        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6535                getLineCount() == 1 && canMarquee()) {
6536
6537            if (mMarquee == null) mMarquee = new Marquee(this);
6538            mMarquee.start(mMarqueeRepeatLimit);
6539        }
6540    }
6541
6542    private void stopMarquee() {
6543        if (mMarquee != null && !mMarquee.isStopped()) {
6544            mMarquee.stop();
6545        }
6546    }
6547
6548    private void startStopMarquee(boolean start) {
6549        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6550            if (start) {
6551                startMarquee();
6552            } else {
6553                stopMarquee();
6554            }
6555        }
6556    }
6557
6558    private static final class Marquee extends Handler {
6559        // TODO: Add an option to configure this
6560        private static final float MARQUEE_DELTA_MAX = 0.07f;
6561        private static final int MARQUEE_DELAY = 1200;
6562        private static final int MARQUEE_RESTART_DELAY = 1200;
6563        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6564        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6565
6566        private static final byte MARQUEE_STOPPED = 0x0;
6567        private static final byte MARQUEE_STARTING = 0x1;
6568        private static final byte MARQUEE_RUNNING = 0x2;
6569
6570        private static final int MESSAGE_START = 0x1;
6571        private static final int MESSAGE_TICK = 0x2;
6572        private static final int MESSAGE_RESTART = 0x3;
6573
6574        private final WeakReference<TextView> mView;
6575
6576        private byte mStatus = MARQUEE_STOPPED;
6577        private final float mScrollUnit;
6578        private float mMaxScroll;
6579        float mMaxFadeScroll;
6580        private float mGhostStart;
6581        private float mGhostOffset;
6582        private float mFadeStop;
6583        private int mRepeatLimit;
6584
6585        float mScroll;
6586
6587        Marquee(TextView v) {
6588            final float density = v.getContext().getResources().getDisplayMetrics().density;
6589            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6590            mView = new WeakReference<TextView>(v);
6591        }
6592
6593        @Override
6594        public void handleMessage(Message msg) {
6595            switch (msg.what) {
6596                case MESSAGE_START:
6597                    mStatus = MARQUEE_RUNNING;
6598                    tick();
6599                    break;
6600                case MESSAGE_TICK:
6601                    tick();
6602                    break;
6603                case MESSAGE_RESTART:
6604                    if (mStatus == MARQUEE_RUNNING) {
6605                        if (mRepeatLimit >= 0) {
6606                            mRepeatLimit--;
6607                        }
6608                        start(mRepeatLimit);
6609                    }
6610                    break;
6611            }
6612        }
6613
6614        void tick() {
6615            if (mStatus != MARQUEE_RUNNING) {
6616                return;
6617            }
6618
6619            removeMessages(MESSAGE_TICK);
6620
6621            final TextView textView = mView.get();
6622            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6623                mScroll += mScrollUnit;
6624                if (mScroll > mMaxScroll) {
6625                    mScroll = mMaxScroll;
6626                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6627                } else {
6628                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6629                }
6630                textView.invalidate();
6631            }
6632        }
6633
6634        void stop() {
6635            mStatus = MARQUEE_STOPPED;
6636            removeMessages(MESSAGE_START);
6637            removeMessages(MESSAGE_RESTART);
6638            removeMessages(MESSAGE_TICK);
6639            resetScroll();
6640        }
6641
6642        private void resetScroll() {
6643            mScroll = 0.0f;
6644            final TextView textView = mView.get();
6645            if (textView != null) textView.invalidate();
6646        }
6647
6648        void start(int repeatLimit) {
6649            if (repeatLimit == 0) {
6650                stop();
6651                return;
6652            }
6653            mRepeatLimit = repeatLimit;
6654            final TextView textView = mView.get();
6655            if (textView != null && textView.mLayout != null) {
6656                mStatus = MARQUEE_STARTING;
6657                mScroll = 0.0f;
6658                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6659                        textView.getCompoundPaddingRight();
6660                final float lineWidth = textView.mLayout.getLineWidth(0);
6661                final float gap = textWidth / 3.0f;
6662                mGhostStart = lineWidth - textWidth + gap;
6663                mMaxScroll = mGhostStart + textWidth;
6664                mGhostOffset = lineWidth + gap;
6665                mFadeStop = lineWidth + textWidth / 6.0f;
6666                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6667
6668                textView.invalidate();
6669                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6670            }
6671        }
6672
6673        float getGhostOffset() {
6674            return mGhostOffset;
6675        }
6676
6677        boolean shouldDrawLeftFade() {
6678            return mScroll <= mFadeStop;
6679        }
6680
6681        boolean shouldDrawGhost() {
6682            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6683        }
6684
6685        boolean isRunning() {
6686            return mStatus == MARQUEE_RUNNING;
6687        }
6688
6689        boolean isStopped() {
6690            return mStatus == MARQUEE_STOPPED;
6691        }
6692    }
6693
6694    /**
6695     * This method is called when the text is changed, in case any
6696     * subclasses would like to know.
6697     *
6698     * @param text The text the TextView is displaying.
6699     * @param start The offset of the start of the range of the text
6700     *              that was modified.
6701     * @param before The offset of the former end of the range of the
6702     *               text that was modified.  If text was simply inserted,
6703     *               this will be the same as <code>start</code>.
6704     *               If text was replaced with new text or deleted, the
6705     *               length of the old text was <code>before-start</code>.
6706     * @param after The offset of the end of the range of the text
6707     *              that was modified.  If text was simply deleted,
6708     *              this will be the same as <code>start</code>.
6709     *              If text was replaced with new text or inserted,
6710     *              the length of the new text is <code>after-start</code>.
6711     */
6712    protected void onTextChanged(CharSequence text,
6713                                 int start, int before, int after) {
6714    }
6715
6716    /**
6717     * This method is called when the selection has changed, in case any
6718     * subclasses would like to know.
6719     *
6720     * @param selStart The new selection start location.
6721     * @param selEnd The new selection end location.
6722     */
6723    protected void onSelectionChanged(int selStart, int selEnd) {
6724    }
6725
6726    /**
6727     * Adds a TextWatcher to the list of those whose methods are called
6728     * whenever this TextView's text changes.
6729     * <p>
6730     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6731     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6732     * if there are any text changed listeners forces the buffer type to
6733     * Editable if it would not otherwise be and does call this method.
6734     */
6735    public void addTextChangedListener(TextWatcher watcher) {
6736        if (mListeners == null) {
6737            mListeners = new ArrayList<TextWatcher>();
6738        }
6739
6740        mListeners.add(watcher);
6741    }
6742
6743    /**
6744     * Removes the specified TextWatcher from the list of those whose
6745     * methods are called
6746     * whenever this TextView's text changes.
6747     */
6748    public void removeTextChangedListener(TextWatcher watcher) {
6749        if (mListeners != null) {
6750            int i = mListeners.indexOf(watcher);
6751
6752            if (i >= 0) {
6753                mListeners.remove(i);
6754            }
6755        }
6756    }
6757
6758    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6759                                   int after) {
6760        if (mListeners != null) {
6761            final ArrayList<TextWatcher> list = mListeners;
6762            final int count = list.size();
6763            for (int i = 0; i < count; i++) {
6764                list.get(i).beforeTextChanged(text, start, before, after);
6765            }
6766        }
6767    }
6768
6769    /**
6770     * Not private so it can be called from an inner class without going
6771     * through a thunk.
6772     */
6773    void sendOnTextChanged(CharSequence text, int start, int before,
6774                                   int after) {
6775        if (mListeners != null) {
6776            final ArrayList<TextWatcher> list = mListeners;
6777            final int count = list.size();
6778            for (int i = 0; i < count; i++) {
6779                list.get(i).onTextChanged(text, start, before, after);
6780            }
6781        }
6782    }
6783
6784    /**
6785     * Not private so it can be called from an inner class without going
6786     * through a thunk.
6787     */
6788    void sendAfterTextChanged(Editable text) {
6789        if (mListeners != null) {
6790            final ArrayList<TextWatcher> list = mListeners;
6791            final int count = list.size();
6792            for (int i = 0; i < count; i++) {
6793                list.get(i).afterTextChanged(text);
6794            }
6795        }
6796    }
6797
6798    /**
6799     * Not private so it can be called from an inner class without going
6800     * through a thunk.
6801     */
6802    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
6803        final InputMethodState ims = mInputMethodState;
6804        if (ims == null || ims.mBatchEditNesting == 0) {
6805            updateAfterEdit();
6806        }
6807        if (ims != null) {
6808            ims.mContentChanged = true;
6809            if (ims.mChangedStart < 0) {
6810                ims.mChangedStart = start;
6811                ims.mChangedEnd = start+before;
6812            } else {
6813                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6814                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6815            }
6816            ims.mChangedDelta += after-before;
6817        }
6818
6819        sendOnTextChanged(buffer, start, before, after);
6820        onTextChanged(buffer, start, before, after);
6821
6822        // Hide the controllers if the amount of content changed
6823        if (before != after) {
6824            hideControllers();
6825        }
6826    }
6827
6828    /**
6829     * Not private so it can be called from an inner class without going
6830     * through a thunk.
6831     */
6832    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
6833        // XXX Make the start and end move together if this ends up
6834        // spending too much time invalidating.
6835
6836        boolean selChanged = false;
6837        int newSelStart=-1, newSelEnd=-1;
6838
6839        final InputMethodState ims = mInputMethodState;
6840
6841        if (what == Selection.SELECTION_END) {
6842            mHighlightPathBogus = true;
6843            selChanged = true;
6844            newSelEnd = newStart;
6845
6846            if (!isFocused()) {
6847                mSelectionMoved = true;
6848            }
6849
6850            if (oldStart >= 0 || newStart >= 0) {
6851                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6852                registerForPreDraw();
6853
6854                if (isFocused()) {
6855                    mShowCursor = SystemClock.uptimeMillis();
6856                    makeBlink();
6857                }
6858            }
6859        }
6860
6861        if (what == Selection.SELECTION_START) {
6862            mHighlightPathBogus = true;
6863            selChanged = true;
6864            newSelStart = newStart;
6865
6866            if (!isFocused()) {
6867                mSelectionMoved = true;
6868            }
6869
6870            if (oldStart >= 0 || newStart >= 0) {
6871                int end = Selection.getSelectionEnd(buf);
6872                invalidateCursor(end, oldStart, newStart);
6873            }
6874        }
6875
6876        if (selChanged) {
6877            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6878                if (newSelStart < 0) {
6879                    newSelStart = Selection.getSelectionStart(buf);
6880                }
6881                if (newSelEnd < 0) {
6882                    newSelEnd = Selection.getSelectionEnd(buf);
6883                }
6884                onSelectionChanged(newSelStart, newSelEnd);
6885            }
6886        }
6887
6888        if (what instanceof UpdateAppearance ||
6889            what instanceof ParagraphStyle) {
6890            if (ims == null || ims.mBatchEditNesting == 0) {
6891                invalidate();
6892                mHighlightPathBogus = true;
6893                checkForResize();
6894            } else {
6895                ims.mContentChanged = true;
6896            }
6897        }
6898
6899        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6900            mHighlightPathBogus = true;
6901            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6902                ims.mSelectionModeChanged = true;
6903            }
6904
6905            if (Selection.getSelectionStart(buf) >= 0) {
6906                if (ims == null || ims.mBatchEditNesting == 0) {
6907                    invalidateCursor();
6908                } else {
6909                    ims.mCursorChanged = true;
6910                }
6911            }
6912        }
6913
6914        if (what instanceof ParcelableSpan) {
6915            // If this is a span that can be sent to a remote process,
6916            // the current extract editor would be interested in it.
6917            if (ims != null && ims.mExtracting != null) {
6918                if (ims.mBatchEditNesting != 0) {
6919                    if (oldStart >= 0) {
6920                        if (ims.mChangedStart > oldStart) {
6921                            ims.mChangedStart = oldStart;
6922                        }
6923                        if (ims.mChangedStart > oldEnd) {
6924                            ims.mChangedStart = oldEnd;
6925                        }
6926                    }
6927                    if (newStart >= 0) {
6928                        if (ims.mChangedStart > newStart) {
6929                            ims.mChangedStart = newStart;
6930                        }
6931                        if (ims.mChangedStart > newEnd) {
6932                            ims.mChangedStart = newEnd;
6933                        }
6934                    }
6935                } else {
6936                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6937                            + oldStart + "-" + oldEnd + ","
6938                            + newStart + "-" + newEnd + what);
6939                    ims.mContentChanged = true;
6940                }
6941            }
6942        }
6943    }
6944
6945    private class ChangeWatcher
6946    implements TextWatcher, SpanWatcher {
6947
6948        private CharSequence mBeforeText;
6949
6950        public void beforeTextChanged(CharSequence buffer, int start,
6951                                      int before, int after) {
6952            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6953                    + " before=" + before + " after=" + after + ": " + buffer);
6954
6955            if (AccessibilityManager.getInstance(mContext).isEnabled()
6956                    && !isPasswordInputType(mInputType)
6957                    && !hasPasswordTransformationMethod()) {
6958                mBeforeText = buffer.toString();
6959            }
6960
6961            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6962        }
6963
6964        public void onTextChanged(CharSequence buffer, int start,
6965                                  int before, int after) {
6966            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6967                    + " before=" + before + " after=" + after + ": " + buffer);
6968            TextView.this.handleTextChanged(buffer, start, before, after);
6969
6970            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6971                    (isFocused() || isSelected() &&
6972                    isShown())) {
6973                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6974                mBeforeText = null;
6975            }
6976        }
6977
6978        public void afterTextChanged(Editable buffer) {
6979            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6980            TextView.this.sendAfterTextChanged(buffer);
6981
6982            if (MetaKeyKeyListener.getMetaState(buffer,
6983                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6984                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6985            }
6986        }
6987
6988        public void onSpanChanged(Spannable buf,
6989                                  Object what, int s, int e, int st, int en) {
6990            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6991                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6992            TextView.this.spanChange(buf, what, s, st, e, en);
6993        }
6994
6995        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6996            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6997                    + " what=" + what + ": " + buf);
6998            TextView.this.spanChange(buf, what, -1, s, -1, e);
6999        }
7000
7001        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7002            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7003                    + " what=" + what + ": " + buf);
7004            TextView.this.spanChange(buf, what, s, -1, e, -1);
7005        }
7006    }
7007
7008    private void makeBlink() {
7009        if (!isCursorVisible()) {
7010            if (mBlink != null) {
7011                mBlink.removeCallbacks(mBlink);
7012            }
7013
7014            return;
7015        }
7016
7017        if (mBlink == null)
7018            mBlink = new Blink(this);
7019
7020        mBlink.removeCallbacks(mBlink);
7021        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
7022    }
7023
7024    /**
7025     * @hide
7026     */
7027    @Override
7028    public void dispatchFinishTemporaryDetach() {
7029        mDispatchTemporaryDetach = true;
7030        super.dispatchFinishTemporaryDetach();
7031        mDispatchTemporaryDetach = false;
7032    }
7033
7034    @Override
7035    public void onStartTemporaryDetach() {
7036        super.onStartTemporaryDetach();
7037        // Only track when onStartTemporaryDetach() is called directly,
7038        // usually because this instance is an editable field in a list
7039        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7040    }
7041
7042    @Override
7043    public void onFinishTemporaryDetach() {
7044        super.onFinishTemporaryDetach();
7045        // Only track when onStartTemporaryDetach() is called directly,
7046        // usually because this instance is an editable field in a list
7047        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7048    }
7049
7050    @Override
7051    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7052        if (mTemporaryDetach) {
7053            // If we are temporarily in the detach state, then do nothing.
7054            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7055            return;
7056        }
7057
7058        mShowCursor = SystemClock.uptimeMillis();
7059
7060        ensureEndedBatchEdit();
7061
7062        if (focused) {
7063            int selStart = getSelectionStart();
7064            int selEnd = getSelectionEnd();
7065
7066            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7067            // mode for these, unless there was a specific selection already started.
7068            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7069                    selEnd == mText.length();
7070            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7071
7072            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7073                // If a tap was used to give focus to that view, move cursor at tap position.
7074                // Has to be done before onTakeFocus, which can be overloaded.
7075                final int lastTapPosition = getLastTapPosition();
7076                if (lastTapPosition >= 0) {
7077                    Selection.setSelection((Spannable) mText, lastTapPosition);
7078                }
7079
7080                if (mMovement != null) {
7081                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7082                }
7083
7084                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7085                // pressed. Since it is the ViewRoot's mView, it requests focus before
7086                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7087                // This special case ensure that we keep current selection in that case.
7088                // It would be better to know why the DecorView does not have focus at that time.
7089                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7090                        selStart >= 0 && selEnd >= 0) {
7091                    /*
7092                     * Someone intentionally set the selection, so let them
7093                     * do whatever it is that they wanted to do instead of
7094                     * the default on-focus behavior.  We reset the selection
7095                     * here instead of just skipping the onTakeFocus() call
7096                     * because some movement methods do something other than
7097                     * just setting the selection in theirs and we still
7098                     * need to go through that path.
7099                     */
7100                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7101                }
7102
7103                if (mSelectAllOnFocus) {
7104                    selectAll();
7105                }
7106
7107                mTouchFocusSelected = true;
7108            }
7109
7110            mFrozenWithFocus = false;
7111            mSelectionMoved = false;
7112
7113            if (mText instanceof Spannable) {
7114                Spannable sp = (Spannable) mText;
7115                MetaKeyKeyListener.resetMetaState(sp);
7116            }
7117
7118            makeBlink();
7119
7120            if (mError != null) {
7121                showError();
7122            }
7123        } else {
7124            if (mError != null) {
7125                hideError();
7126            }
7127            // Don't leave us in the middle of a batch edit.
7128            onEndBatchEdit();
7129
7130            hideInsertionPointCursorController();
7131            if (this instanceof ExtractEditText) {
7132                // terminateTextSelectionMode removes selection, which we want to keep when
7133                // ExtractEditText goes out of focus.
7134                final int selStart = getSelectionStart();
7135                final int selEnd = getSelectionEnd();
7136                terminateSelectionActionMode();
7137                Selection.setSelection((Spannable) mText, selStart, selEnd);
7138            } else {
7139                terminateSelectionActionMode();
7140            }
7141
7142            // No need to create the controller
7143            if (mSelectionModifierCursorController != null) {
7144                mSelectionModifierCursorController.resetTouchOffsets();
7145            }
7146        }
7147
7148        startStopMarquee(focused);
7149
7150        if (mTransformation != null) {
7151            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7152        }
7153
7154        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7155
7156        // Performed after super.onFocusChanged so that this TextView is registered and can ask for
7157        // the IME. Showing the IME while focus is moved using the D-Pad is a bad idea, however this
7158        // does not happen in that case (using the arrows on a bluetooth keyboard).
7159        if (focused && isTextEditable()) {
7160            final InputMethodManager imm = InputMethodManager.peekInstance();
7161            if (imm != null) imm.showSoftInput(this, 0, null);
7162        }
7163    }
7164
7165    private int getLastTapPosition() {
7166        // No need to create the controller at that point, no last tap position saved
7167        if (mSelectionModifierCursorController != null) {
7168            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7169            if (lastTapPosition >= 0) {
7170                // Safety check, should not be possible.
7171                if (lastTapPosition > mText.length()) {
7172                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7173                            + mText.length() + ")");
7174                    lastTapPosition = mText.length();
7175                }
7176                return lastTapPosition;
7177            }
7178        }
7179
7180        return -1;
7181    }
7182
7183    @Override
7184    public void onWindowFocusChanged(boolean hasWindowFocus) {
7185        super.onWindowFocusChanged(hasWindowFocus);
7186
7187        if (hasWindowFocus) {
7188            if (mBlink != null) {
7189                mBlink.uncancel();
7190
7191                if (isFocused()) {
7192                    mShowCursor = SystemClock.uptimeMillis();
7193                    makeBlink();
7194                }
7195            }
7196        } else {
7197            if (mBlink != null) {
7198                mBlink.cancel();
7199            }
7200            // Don't leave us in the middle of a batch edit.
7201            onEndBatchEdit();
7202            if (mInputContentType != null) {
7203                mInputContentType.enterDown = false;
7204            }
7205            hideControllers();
7206        }
7207
7208        startStopMarquee(hasWindowFocus);
7209    }
7210
7211    @Override
7212    protected void onVisibilityChanged(View changedView, int visibility) {
7213        super.onVisibilityChanged(changedView, visibility);
7214        if (visibility != VISIBLE) {
7215            hideControllers();
7216        }
7217    }
7218
7219    /**
7220     * Use {@link BaseInputConnection#removeComposingSpans
7221     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7222     * state from this text view.
7223     */
7224    public void clearComposingText() {
7225        if (mText instanceof Spannable) {
7226            BaseInputConnection.removeComposingSpans((Spannable)mText);
7227        }
7228    }
7229
7230    @Override
7231    public void setSelected(boolean selected) {
7232        boolean wasSelected = isSelected();
7233
7234        super.setSelected(selected);
7235
7236        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7237            if (selected) {
7238                startMarquee();
7239            } else {
7240                stopMarquee();
7241            }
7242        }
7243    }
7244
7245    class CommitSelectionReceiver extends ResultReceiver {
7246        private final int mPrevStart, mPrevEnd;
7247
7248        public CommitSelectionReceiver(int prevStart, int prevEnd) {
7249            super(getHandler());
7250            mPrevStart = prevStart;
7251            mPrevEnd = prevEnd;
7252        }
7253
7254        @Override
7255        protected void onReceiveResult(int resultCode, Bundle resultData) {
7256            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
7257            // by restoring its previous position.
7258            if (resultCode == InputMethodManager.RESULT_SHOWN) {
7259                final int len = mText.length();
7260                int start = Math.min(len, mPrevStart);
7261                int end = Math.min(len, mPrevEnd);
7262                Selection.setSelection((Spannable)mText, start, end);
7263
7264                boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7265                if (hasSelection() && !selectAllGotFocus) {
7266                    startSelectionActionMode();
7267                }
7268            }
7269        }
7270    }
7271
7272    @Override
7273    public boolean onTouchEvent(MotionEvent event) {
7274        final int action = event.getActionMasked();
7275
7276        if (hasInsertionController()) {
7277            getInsertionController().onTouchEvent(event);
7278        }
7279        if (hasSelectionController()) {
7280            getSelectionController().onTouchEvent(event);
7281        }
7282
7283        if (action == MotionEvent.ACTION_DOWN) {
7284            mLastDownPositionX = (int) event.getX();
7285            mLastDownPositionY = (int) event.getY();
7286
7287            // Reset this state; it will be re-set if super.onTouchEvent
7288            // causes focus to move to the view.
7289            mTouchFocusSelected = false;
7290            mIgnoreActionUpEvent = false;
7291        }
7292
7293        final boolean superResult = super.onTouchEvent(event);
7294
7295        /*
7296         * Don't handle the release after a long press, because it will
7297         * move the selection away from whatever the menu action was
7298         * trying to affect.
7299         */
7300        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7301            mDiscardNextActionUp = false;
7302            return superResult;
7303        }
7304
7305        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7306                isFocused();
7307
7308        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7309                && mText instanceof Spannable && mLayout != null) {
7310            boolean handled = false;
7311
7312            // Save previous selection, in case this event is used to show the IME.
7313            int oldSelStart = getSelectionStart();
7314            int oldSelEnd = getSelectionEnd();
7315
7316            final int oldScrollX = mScrollX;
7317            final int oldScrollY = mScrollY;
7318
7319            if (mMovement != null) {
7320                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7321            }
7322
7323            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7324                // The LinkMovementMethod which should handle taps on links has not been installed
7325                // to support text selection. We reproduce its behavior here to open links.
7326                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7327                        getSelectionEnd(), ClickableSpan.class);
7328
7329                if (links.length != 0) {
7330                    links[0].onClick(this);
7331                    handled = true;
7332                }
7333            }
7334
7335            if (isTextEditable() || mTextIsSelectable) {
7336                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
7337                    // Hide insertion anchor while scrolling. Leave selection.
7338                    hideInsertionPointCursorController();
7339                    // No need to create the controller, since there is nothing to update.
7340                    if (mSelectionModifierCursorController != null &&
7341                            mSelectionModifierCursorController.isShowing()) {
7342                        mSelectionModifierCursorController.updatePosition();
7343                    }
7344                }
7345
7346                if (touchIsFinished) {
7347                    CommitSelectionReceiver csr = null;
7348                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
7349                            didTouchFocusSelect()) {
7350                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
7351                    }
7352
7353                    // Show the IME, except when selecting in read-only text.
7354                    if (!mTextIsSelectable) {
7355                        final InputMethodManager imm = InputMethodManager.peekInstance();
7356                        handled |= imm != null && imm.showSoftInput(this, 0, csr) && (csr != null);
7357                    }
7358
7359                    stopSelectionActionMode();
7360                    boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7361                    if (hasInsertionController() && !selectAllGotFocus) {
7362                        getInsertionController().show();
7363                    }
7364                }
7365            }
7366
7367            if (handled) {
7368                return true;
7369            }
7370        }
7371
7372        return superResult;
7373    }
7374
7375    private void prepareCursorControllers() {
7376        boolean windowSupportsHandles = false;
7377
7378        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7379        if (params instanceof WindowManager.LayoutParams) {
7380            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7381            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7382                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7383        }
7384
7385        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7386        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7387                mLayout != null;
7388
7389        if (!mInsertionControllerEnabled) {
7390            hideInsertionPointCursorController();
7391            mInsertionPointCursorController = null;
7392        }
7393
7394        if (!mSelectionControllerEnabled) {
7395            stopSelectionActionMode();
7396            mSelectionModifierCursorController = null;
7397        }
7398    }
7399
7400    /**
7401     * @return True iff this TextView contains a text that can be edited, or if this is
7402     * a selectable TextView.
7403     */
7404    private boolean isTextEditable() {
7405        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7406    }
7407
7408    /**
7409     * Returns true, only while processing a touch gesture, if the initial
7410     * touch down event caused focus to move to the text view and as a result
7411     * its selection changed.  Only valid while processing the touch gesture
7412     * of interest.
7413     */
7414    public boolean didTouchFocusSelect() {
7415        return mTouchFocusSelected;
7416    }
7417
7418    @Override
7419    public void cancelLongPress() {
7420        super.cancelLongPress();
7421        mIgnoreActionUpEvent = true;
7422    }
7423
7424    @Override
7425    public boolean onTrackballEvent(MotionEvent event) {
7426        if (mMovement != null && mText instanceof Spannable &&
7427            mLayout != null) {
7428            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7429                return true;
7430            }
7431        }
7432
7433        return super.onTrackballEvent(event);
7434    }
7435
7436    public void setScroller(Scroller s) {
7437        mScroller = s;
7438    }
7439
7440    private static class Blink extends Handler implements Runnable {
7441        private final WeakReference<TextView> mView;
7442        private boolean mCancelled;
7443
7444        public Blink(TextView v) {
7445            mView = new WeakReference<TextView>(v);
7446        }
7447
7448        public void run() {
7449            if (mCancelled) {
7450                return;
7451            }
7452
7453            removeCallbacks(Blink.this);
7454
7455            TextView tv = mView.get();
7456
7457            if (tv != null && tv.isFocused()) {
7458                int st = tv.getSelectionStart();
7459                int en = tv.getSelectionEnd();
7460
7461                if (st == en && st >= 0 && en >= 0) {
7462                    if (tv.mLayout != null) {
7463                        tv.invalidateCursorPath();
7464                    }
7465
7466                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7467                }
7468            }
7469        }
7470
7471        void cancel() {
7472            if (!mCancelled) {
7473                removeCallbacks(Blink.this);
7474                mCancelled = true;
7475            }
7476        }
7477
7478        void uncancel() {
7479            mCancelled = false;
7480        }
7481    }
7482
7483    @Override
7484    protected float getLeftFadingEdgeStrength() {
7485        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7486        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7487            if (mMarquee != null && !mMarquee.isStopped()) {
7488                final Marquee marquee = mMarquee;
7489                if (marquee.shouldDrawLeftFade()) {
7490                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7491                } else {
7492                    return 0.0f;
7493                }
7494            } else if (getLineCount() == 1) {
7495                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7496                    case Gravity.LEFT:
7497                        return 0.0f;
7498                    case Gravity.RIGHT:
7499                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7500                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7501                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7502                    case Gravity.CENTER_HORIZONTAL:
7503                        return 0.0f;
7504                }
7505            }
7506        }
7507        return super.getLeftFadingEdgeStrength();
7508    }
7509
7510    @Override
7511    protected float getRightFadingEdgeStrength() {
7512        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7513        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7514            if (mMarquee != null && !mMarquee.isStopped()) {
7515                final Marquee marquee = mMarquee;
7516                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7517            } else if (getLineCount() == 1) {
7518                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7519                    case Gravity.LEFT:
7520                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7521                                getCompoundPaddingRight();
7522                        final float lineWidth = mLayout.getLineWidth(0);
7523                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7524                    case Gravity.RIGHT:
7525                        return 0.0f;
7526                    case Gravity.CENTER_HORIZONTAL:
7527                    case Gravity.FILL_HORIZONTAL:
7528                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7529                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7530                                getHorizontalFadingEdgeLength();
7531                }
7532            }
7533        }
7534        return super.getRightFadingEdgeStrength();
7535    }
7536
7537    @Override
7538    protected int computeHorizontalScrollRange() {
7539        if (mLayout != null) {
7540            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7541                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7542        }
7543
7544        return super.computeHorizontalScrollRange();
7545    }
7546
7547    @Override
7548    protected int computeVerticalScrollRange() {
7549        if (mLayout != null)
7550            return mLayout.getHeight();
7551
7552        return super.computeVerticalScrollRange();
7553    }
7554
7555    @Override
7556    protected int computeVerticalScrollExtent() {
7557        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7558    }
7559
7560    public enum BufferType {
7561        NORMAL, SPANNABLE, EDITABLE,
7562    }
7563
7564    /**
7565     * Returns the TextView_textColor attribute from the
7566     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7567     * from the TextView_textAppearance attribute, if TextView_textColor
7568     * was not set directly.
7569     */
7570    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7571        ColorStateList colors;
7572        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7573                                         TextView_textColor);
7574
7575        if (colors == null) {
7576            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7577                                         TextView_textAppearance, -1);
7578            if (ap != -1) {
7579                TypedArray appearance;
7580                appearance = context.obtainStyledAttributes(ap,
7581                                            com.android.internal.R.styleable.TextAppearance);
7582                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7583                                                  TextAppearance_textColor);
7584                appearance.recycle();
7585            }
7586        }
7587
7588        return colors;
7589    }
7590
7591    /**
7592     * Returns the default color from the TextView_textColor attribute
7593     * from the AttributeSet, if set, or the default color from the
7594     * TextAppearance_textColor from the TextView_textAppearance attribute,
7595     * if TextView_textColor was not set directly.
7596     */
7597    public static int getTextColor(Context context,
7598                                   TypedArray attrs,
7599                                   int def) {
7600        ColorStateList colors = getTextColors(context, attrs);
7601
7602        if (colors == null) {
7603            return def;
7604        } else {
7605            return colors.getDefaultColor();
7606        }
7607    }
7608
7609    @Override
7610    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7611        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7612        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7613            switch (keyCode) {
7614            case KeyEvent.KEYCODE_A:
7615                if (canSelectText()) {
7616                    return onTextContextMenuItem(ID_SELECT_ALL);
7617                }
7618                break;
7619            case KeyEvent.KEYCODE_X:
7620                if (canCut()) {
7621                    return onTextContextMenuItem(ID_CUT);
7622                }
7623                break;
7624            case KeyEvent.KEYCODE_C:
7625                if (canCopy()) {
7626                    return onTextContextMenuItem(ID_COPY);
7627                }
7628                break;
7629            case KeyEvent.KEYCODE_V:
7630                if (canPaste()) {
7631                    return onTextContextMenuItem(ID_PASTE);
7632                }
7633                break;
7634            }
7635        }
7636        return super.onKeyShortcut(keyCode, event);
7637    }
7638
7639    /**
7640     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7641     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7642     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7643     */
7644    private boolean canSelectText() {
7645        return hasSelectionController() && mText.length() != 0;
7646    }
7647
7648    /**
7649     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7650     * The text must be spannable and the movement method must allow for arbitary selection.
7651     *
7652     * See also {@link #canSelectText()}.
7653     */
7654    private boolean textCanBeSelected() {
7655        // prepareCursorController() relies on this method.
7656        // If you change this condition, make sure prepareCursorController is called anywhere
7657        // the value of this condition might be changed.
7658        return mText instanceof Spannable && mMovement != null && mMovement.canSelectArbitrarily();
7659    }
7660
7661    private boolean canCut() {
7662        if (hasPasswordTransformationMethod()) {
7663            return false;
7664        }
7665
7666        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
7667            return true;
7668        }
7669
7670        return false;
7671    }
7672
7673    private boolean canCopy() {
7674        if (hasPasswordTransformationMethod()) {
7675            return false;
7676        }
7677
7678        if (mText.length() > 0 && hasSelection()) {
7679            return true;
7680        }
7681
7682        return false;
7683    }
7684
7685    private boolean canPaste() {
7686        return (mText instanceof Editable &&
7687                mInput != null &&
7688                getSelectionStart() >= 0 &&
7689                getSelectionEnd() >= 0 &&
7690                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7691                hasPrimaryClip());
7692    }
7693
7694    private boolean isWordCharacter(int c, int type) {
7695        return (c == '\'' || c == '"' ||
7696                type == Character.UPPERCASE_LETTER ||
7697                type == Character.LOWERCASE_LETTER ||
7698                type == Character.TITLECASE_LETTER ||
7699                type == Character.MODIFIER_LETTER ||
7700                type == Character.OTHER_LETTER || // Should handle asian characters
7701                type == Character.DECIMAL_DIGIT_NUMBER);
7702    }
7703
7704    /**
7705     * Returns the offsets delimiting the 'word' located at position offset.
7706     *
7707     * @param offset An offset in the text.
7708     * @return The offsets for the start and end of the word located at <code>offset</code>.
7709     * The two ints offsets are packed in a long using {@link #packRangeInLong(int, int)}.
7710     * Returns -1 if no valid word was found.
7711     */
7712    private long getWordLimitsAt(int offset) {
7713        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7714        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7715
7716        // Text selection is not permitted in password fields
7717        if (hasPasswordTransformationMethod()) {
7718            return -1;
7719        }
7720
7721        final int len = mText.length();
7722
7723        // Specific text fields: always select the entire text
7724        if (klass == InputType.TYPE_CLASS_NUMBER ||
7725                klass == InputType.TYPE_CLASS_PHONE ||
7726                klass == InputType.TYPE_CLASS_DATETIME ||
7727                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7728                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7729                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7730                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7731            return len > 0 ? packRangeInLong(0, len) : -1;
7732        }
7733
7734        int end = Math.min(offset, len);
7735        if (end < 0) {
7736            return -1;
7737        }
7738
7739        final int MAX_LENGTH = 48;
7740        int start = end;
7741
7742        for (; start > 0; start--) {
7743            final char c = mTransformed.charAt(start - 1);
7744            final int type = Character.getType(c);
7745            if (start == end && type == Character.OTHER_PUNCTUATION) {
7746                // Cases where the text ends with a '.' and we select from the end of the line
7747                // (right after the dot), or when we select from the space character in "aaa, bbb".
7748                continue;
7749            }
7750            if (type == Character.SURROGATE) { // Two Character codepoint
7751                end = start - 1; // Recheck as a pair when scanning forward
7752                continue;
7753            }
7754            if (!isWordCharacter(c, type)) break;
7755            if ((end - start) > MAX_LENGTH) return -1;
7756        }
7757
7758        for (; end < len; end++) {
7759            final int c = Character.codePointAt(mTransformed, end);
7760            final int type = Character.getType(c);
7761            if (!isWordCharacter(c, type)) break;
7762            if ((end - start) > MAX_LENGTH) return -1;
7763            if (c > 0xFFFF) { // Two Character codepoint
7764                end++;
7765            }
7766        }
7767
7768        if (start == end) {
7769            return -1;
7770        }
7771
7772        // Two ints packed in a long
7773        return packRangeInLong(start, end);
7774    }
7775
7776    private static long packRangeInLong(int start, int end) {
7777        return (((long) start) << 32) | end;
7778    }
7779
7780    private static int extractRangeStartFromLong(long range) {
7781        return (int) (range >>> 32);
7782    }
7783
7784    private static int extractRangeEndFromLong(long range) {
7785        return (int) (range & 0x00000000FFFFFFFFL);
7786    }
7787
7788    private void selectAll() {
7789        Selection.setSelection((Spannable) mText, 0, mText.length());
7790    }
7791
7792    private void selectCurrentWord() {
7793        if (!canSelectText()) {
7794            return;
7795        }
7796
7797        if (hasPasswordTransformationMethod()) {
7798            // Always select all on a password field.
7799            // Cut/copy menu entries are not available for passwords, but being able to select all
7800            // is however useful to delete or paste to replace the entire content.
7801            selectAll();
7802            return;
7803        }
7804
7805        long lastTouchOffsets = getLastTouchOffsets();
7806        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
7807        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
7808
7809        int selectionStart, selectionEnd;
7810
7811        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7812        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7813        if (urlSpans.length == 1) {
7814            URLSpan url = urlSpans[0];
7815            selectionStart = ((Spanned) mText).getSpanStart(url);
7816            selectionEnd = ((Spanned) mText).getSpanEnd(url);
7817        } else {
7818            long wordLimits = getWordLimitsAt(minOffset);
7819            if (wordLimits >= 0) {
7820                selectionStart = extractRangeStartFromLong(wordLimits);
7821            } else {
7822                selectionStart = Math.max(minOffset - 5, 0);
7823            }
7824
7825            wordLimits = getWordLimitsAt(maxOffset);
7826            if (wordLimits >= 0) {
7827                selectionEnd = extractRangeEndFromLong(wordLimits);
7828            } else {
7829                selectionEnd = Math.min(maxOffset + 5, mText.length());
7830            }
7831        }
7832
7833        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7834    }
7835
7836    private long getLastTouchOffsets() {
7837        int minOffset, maxOffset;
7838
7839        if (mContextMenuTriggeredByKey) {
7840            minOffset = getSelectionStart();
7841            maxOffset = getSelectionEnd();
7842        } else {
7843            SelectionModifierCursorController selectionController = getSelectionController();
7844            minOffset = selectionController.getMinTouchOffset();
7845            maxOffset = selectionController.getMaxTouchOffset();
7846        }
7847
7848        return packRangeInLong(minOffset, maxOffset);
7849    }
7850
7851    @Override
7852    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7853        if (!isShown()) {
7854            return false;
7855        }
7856
7857        final boolean isPassword = hasPasswordTransformationMethod();
7858
7859        if (!isPassword) {
7860            CharSequence text = getText();
7861            if (TextUtils.isEmpty(text)) {
7862                text = getHint();
7863            }
7864            if (!TextUtils.isEmpty(text)) {
7865                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7866                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7867                }
7868                event.getText().add(text);
7869            }
7870        } else {
7871            event.setPassword(isPassword);
7872        }
7873        return false;
7874    }
7875
7876    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7877            int fromIndex, int removedCount, int addedCount) {
7878        AccessibilityEvent event =
7879            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7880        event.setFromIndex(fromIndex);
7881        event.setRemovedCount(removedCount);
7882        event.setAddedCount(addedCount);
7883        event.setBeforeText(beforeText);
7884        sendAccessibilityEventUnchecked(event);
7885    }
7886
7887    @Override
7888    protected void onCreateContextMenu(ContextMenu menu) {
7889        super.onCreateContextMenu(menu);
7890        boolean added = false;
7891        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7892        // Problem with context menu on long press: the menu appears while the key in down and when
7893        // the key is released, the view does not receive the key_up event.
7894        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
7895        // events. We cannot simply clear these flags in onTextContextMenuItem since
7896        // it may not be called (if the user/ discards the context menu with the back key).
7897        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
7898        // available in onTextContextMenuItem.
7899        mDPadCenterIsDown = mEnterKeyIsDown = false;
7900
7901        MenuHandler handler = new MenuHandler();
7902
7903        if (mText instanceof Spanned && hasSelectionController()) {
7904            long lastTouchOffset = getLastTouchOffsets();
7905            final int selStart = extractRangeStartFromLong(lastTouchOffset);
7906            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
7907
7908            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
7909            if (urls.length > 0) {
7910                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7911                        setOnMenuItemClickListener(handler);
7912
7913                added = true;
7914            }
7915        }
7916
7917        // The context menu is not empty, which will prevent the selection mode from starting.
7918        // Add a entry to start it in the context menu.
7919        // TODO Does not handle the case where a subclass does not call super.thisMethod or
7920        // populates the menu AFTER this call.
7921        if (menu.size() > 0) {
7922            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
7923                    setOnMenuItemClickListener(handler);
7924            added = true;
7925        }
7926
7927        if (added) {
7928            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7929        }
7930    }
7931
7932    /**
7933     * Returns whether this text view is a current input method target.  The
7934     * default implementation just checks with {@link InputMethodManager}.
7935     */
7936    public boolean isInputMethodTarget() {
7937        InputMethodManager imm = InputMethodManager.peekInstance();
7938        return imm != null && imm.isActive(this);
7939    }
7940
7941    // Selection context mode
7942    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7943    private static final int ID_CUT = android.R.id.cut;
7944    private static final int ID_COPY = android.R.id.copy;
7945    private static final int ID_PASTE = android.R.id.paste;
7946    // Context menu entries
7947    private static final int ID_COPY_URL = android.R.id.copyUrl;
7948    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
7949
7950    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7951        public boolean onMenuItemClick(MenuItem item) {
7952            return onTextContextMenuItem(item.getItemId());
7953        }
7954    }
7955
7956    /**
7957     * Called when a context menu option for the text view is selected.  Currently
7958     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
7959     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
7960     * or {@link android.R.id#copy}.
7961     */
7962    public boolean onTextContextMenuItem(int id) {
7963        int min = 0;
7964        int max = mText.length();
7965
7966        if (isFocused()) {
7967            final int selStart = getSelectionStart();
7968            final int selEnd = getSelectionEnd();
7969
7970            min = Math.max(0, Math.min(selStart, selEnd));
7971            max = Math.max(0, Math.max(selStart, selEnd));
7972        }
7973
7974        switch (id) {
7975            case ID_COPY_URL:
7976                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7977                if (urls.length >= 1) {
7978                    ClipData clip = null;
7979                    for (int i=0; i<urls.length; i++) {
7980                        Uri uri = Uri.parse(urls[0].getURL());
7981                        if (clip == null) {
7982                            clip = ClipData.newRawUri(null, uri);
7983                        } else {
7984                            clip.addItem(new ClipData.Item(uri));
7985                        }
7986                    }
7987                    if (clip != null) {
7988                        setPrimaryClip(clip);
7989                    }
7990                }
7991                stopSelectionActionMode();
7992                return true;
7993
7994            case ID_SELECTION_MODE:
7995                if (mSelectionActionMode != null) {
7996                    // Selection mode is already started, simply change selected part.
7997                    updateSelectedRegion();
7998                } else {
7999                    startSelectionActionMode();
8000                }
8001                return true;
8002
8003            case ID_SELECT_ALL:
8004                selectAll();
8005                // Update controller positions after selection change.
8006                if (hasSelectionController()) {
8007                    getSelectionController().show();
8008                }
8009                return true;
8010
8011            case ID_PASTE:
8012                paste(min, max);
8013                return true;
8014
8015            case ID_CUT:
8016                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8017                ((Editable) mText).delete(min, max);
8018                stopSelectionActionMode();
8019                return true;
8020
8021            case ID_COPY:
8022                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8023                stopSelectionActionMode();
8024                return true;
8025        }
8026        return false;
8027    }
8028
8029    /**
8030     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8031     * by [min, max] when replacing this region by paste.
8032     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8033     * make sure we do not add an extra one from the paste content.
8034     */
8035    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8036        if (paste.length() > 0) {
8037            if (min > 0) {
8038                final char charBefore = mTransformed.charAt(min - 1);
8039                final char charAfter = paste.charAt(0);
8040
8041                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8042                    // Two spaces at beginning of paste: remove one
8043                    final int originalLength = mText.length();
8044                    ((Editable) mText).delete(min - 1, min);
8045                    // Due to filters, there is no guarantee that exactly one character was
8046                    // removed: count instead.
8047                    final int delta = mText.length() - originalLength;
8048                    min += delta;
8049                    max += delta;
8050                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8051                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8052                    // No space at beginning of paste: add one
8053                    final int originalLength = mText.length();
8054                    ((Editable) mText).replace(min, min, " ");
8055                    // Taking possible filters into account as above.
8056                    final int delta = mText.length() - originalLength;
8057                    min += delta;
8058                    max += delta;
8059                }
8060            }
8061
8062            if (max < mText.length()) {
8063                final char charBefore = paste.charAt(paste.length() - 1);
8064                final char charAfter = mTransformed.charAt(max);
8065
8066                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8067                    // Two spaces at end of paste: remove one
8068                    ((Editable) mText).delete(max, max + 1);
8069                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8070                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8071                    // No space at end of paste: add one
8072                    ((Editable) mText).replace(max, max, " ");
8073                }
8074            }
8075        }
8076
8077        return packRangeInLong(min, max);
8078    }
8079
8080    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8081        TextView shadowView = (TextView) inflate(mContext,
8082                com.android.internal.R.layout.text_drag_thumbnail, null);
8083
8084        if (shadowView == null) {
8085            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8086        }
8087
8088        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8089            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8090        }
8091        shadowView.setText(text);
8092        shadowView.setTextColor(getTextColors());
8093
8094        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8095        shadowView.setGravity(Gravity.CENTER);
8096
8097        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8098                ViewGroup.LayoutParams.WRAP_CONTENT));
8099
8100        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8101        shadowView.measure(size, size);
8102
8103        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8104        shadowView.invalidate();
8105        return new DragShadowBuilder(shadowView);
8106    }
8107
8108    private static class DragLocalState {
8109        public TextView sourceTextView;
8110        public int start, end;
8111
8112        public DragLocalState(TextView sourceTextView, int start, int end) {
8113            this.sourceTextView = sourceTextView;
8114            this.start = start;
8115            this.end = end;
8116        }
8117    }
8118
8119    @Override
8120    public boolean performLongClick() {
8121        if (super.performLongClick()) {
8122            mDiscardNextActionUp = true;
8123            return true;
8124        }
8125
8126        // Long press in empty space moves cursor and shows the Paste affordance if available.
8127        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8128                mInsertionControllerEnabled) {
8129            final int offset = getOffset(mLastDownPositionX, mLastDownPositionY);
8130            stopSelectionActionMode();
8131            Selection.setSelection((Spannable)mText, offset);
8132            getInsertionController().show(0);
8133            mDiscardNextActionUp = true;
8134            return true;
8135        }
8136
8137        if (mSelectionActionMode != null) {
8138            if (touchPositionIsInSelection()) {
8139                // Start a drag
8140                final int start = getSelectionStart();
8141                final int end = getSelectionEnd();
8142                CharSequence selectedText = mTransformed.subSequence(start, end);
8143                ClipData data = ClipData.newPlainText(null, selectedText);
8144                DragLocalState localState = new DragLocalState(this, start, end);
8145                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8146                stopSelectionActionMode();
8147            } else {
8148                updateSelectedRegion();
8149            }
8150            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8151            mDiscardNextActionUp = true;
8152            return true;
8153        }
8154
8155        // Start a new selection
8156        if (startSelectionActionMode()) {
8157            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8158            mDiscardNextActionUp = true;
8159            return true;
8160        }
8161
8162        return false;
8163    }
8164
8165    /**
8166     * When selection mode is already started, this method simply updates the selected part of text
8167     * to the text under the finger.
8168     */
8169    private void updateSelectedRegion() {
8170        // Start a new selection at current position, keep selectionAction mode on
8171        selectCurrentWord();
8172        // Updates handles' positions
8173        getSelectionController().show();
8174    }
8175
8176    private boolean touchPositionIsInSelection() {
8177        int selectionStart = getSelectionStart();
8178        int selectionEnd = getSelectionEnd();
8179
8180        if (selectionStart == selectionEnd) {
8181            return false;
8182        }
8183
8184        if (selectionStart > selectionEnd) {
8185            int tmp = selectionStart;
8186            selectionStart = selectionEnd;
8187            selectionEnd = tmp;
8188            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8189        }
8190
8191        SelectionModifierCursorController selectionController = getSelectionController();
8192        int minOffset = selectionController.getMinTouchOffset();
8193        int maxOffset = selectionController.getMaxTouchOffset();
8194
8195        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8196    }
8197
8198    /**
8199     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8200     * selection is initiated in this View.
8201     *
8202     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8203     * Paste actions, depending on what this View supports.
8204     *
8205     * A custom implementation can add new entries in the default menu in its
8206     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
8207     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
8208     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
8209     * {@link android.R.id#paste} ids as parameters.
8210     *
8211     * Returning false from {@link ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will
8212     * prevent the action mode from being started.
8213     *
8214     * Action click events should be handled by the custom implementation of
8215     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8216     *
8217     * Note that text selection mode is not started when a TextView receives focus and the
8218     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8219     * that case, to allow for quick replacement.
8220     */
8221    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8222        mCustomSelectionActionModeCallback = actionModeCallback;
8223    }
8224
8225    /**
8226     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8227     *
8228     * @return The current custom selection callback.
8229     */
8230    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8231        return mCustomSelectionActionModeCallback;
8232    }
8233
8234    /**
8235     *
8236     * @return true if the selection mode was actually started.
8237     */
8238    private boolean startSelectionActionMode() {
8239        if (mSelectionActionMode != null) {
8240            // Selection action mode is already started
8241            return false;
8242        }
8243
8244        if (!canSelectText() || !requestFocus()) {
8245            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8246            return false;
8247        }
8248
8249        if (!hasSelection()) {
8250            // If selection mode is started after a device rotation, there is already a selection.
8251            selectCurrentWord();
8252        }
8253
8254        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8255        mSelectionActionMode = startActionMode(actionModeCallback);
8256        final boolean selectionStarted = mSelectionActionMode != null;
8257
8258        if (selectionStarted && !mTextIsSelectable) {
8259            // Show the IME to be able to replace text, except when selecting non editable text.
8260            final InputMethodManager imm = InputMethodManager.peekInstance();
8261            if (imm != null) imm.showSoftInput(this, 0, null);
8262        }
8263
8264        return selectionStarted;
8265    }
8266
8267    /**
8268     * Same as {@link #stopSelectionActionMode()}, except that there is no cursor controller
8269     * fade out animation. Needed since the drawable and their alpha values are shared by all
8270     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
8271     * new one otherwise.
8272     */
8273    private void terminateSelectionActionMode() {
8274        stopSelectionActionMode();
8275
8276        // No need to create the controller, nothing to cancel in that case.
8277        if (mSelectionModifierCursorController != null) {
8278            mSelectionModifierCursorController.cancelFadeOutAnimation();
8279        }
8280    }
8281
8282    private void stopSelectionActionMode() {
8283        if (mSelectionActionMode != null) {
8284            // This will hide the mSelectionModifierCursorController
8285            mSelectionActionMode.finish();
8286        }
8287    }
8288
8289    /**
8290     * Paste clipboard content between min and max positions.
8291     */
8292    private void paste(int min, int max) {
8293        ClipboardManager clipboard =
8294            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8295        ClipData clip = clipboard.getPrimaryClip();
8296        if (clip != null) {
8297            boolean didfirst = false;
8298            for (int i=0; i<clip.getItemCount(); i++) {
8299                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
8300                if (paste != null) {
8301                    if (!didfirst) {
8302                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8303                        min = extractRangeStartFromLong(minMax);
8304                        max = extractRangeEndFromLong(minMax);
8305                        Selection.setSelection((Spannable) mText, max);
8306                        ((Editable) mText).replace(min, max, paste);
8307                    } else {
8308                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8309                        ((Editable) mText).insert(getSelectionEnd(), paste);
8310                    }
8311                }
8312            }
8313            stopSelectionActionMode();
8314            sLastCutOrCopyTime = 0;
8315        }
8316    }
8317
8318    private void setPrimaryClip(ClipData clip) {
8319        ClipboardManager clipboard = (ClipboardManager) getContext().
8320                getSystemService(Context.CLIPBOARD_SERVICE);
8321        clipboard.setPrimaryClip(clip);
8322        sLastCutOrCopyTime = SystemClock.uptimeMillis();
8323    }
8324
8325    /**
8326     * An ActionMode Callback class that is used to provide actions while in text selection mode.
8327     *
8328     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
8329     * on which of these this TextView supports.
8330     */
8331    private class SelectionActionModeCallback implements ActionMode.Callback {
8332
8333        @Override
8334        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
8335            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
8336
8337            mode.setTitle(mContext.getString(com.android.internal.R.string.textSelectionCABTitle));
8338            mode.setSubtitle(null);
8339
8340            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
8341                    setAlphabeticShortcut('a').
8342                    setShowAsAction(
8343                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8344
8345            if (canCut()) {
8346                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
8347                    setIcon(styledAttributes.getResourceId(
8348                            R.styleable.Theme_actionModeCutDrawable, 0)).
8349                    setAlphabeticShortcut('x').
8350                    setShowAsAction(
8351                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8352            }
8353
8354            if (canCopy()) {
8355                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
8356                    setIcon(styledAttributes.getResourceId(
8357                            R.styleable.Theme_actionModeCopyDrawable, 0)).
8358                    setAlphabeticShortcut('c').
8359                    setShowAsAction(
8360                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8361            }
8362
8363            if (canPaste()) {
8364                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
8365                        setIcon(styledAttributes.getResourceId(
8366                                R.styleable.Theme_actionModePasteDrawable, 0)).
8367                        setAlphabeticShortcut('v').
8368                        setShowAsAction(
8369                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8370            }
8371
8372            styledAttributes.recycle();
8373
8374            if (mCustomSelectionActionModeCallback != null) {
8375                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
8376                    // The custom mode can choose to cancel the action mode
8377                    return false;
8378                }
8379            }
8380
8381            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
8382                getSelectionController().show();
8383                return true;
8384            } else {
8385                return false;
8386            }
8387        }
8388
8389        @Override
8390        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
8391            if (mCustomSelectionActionModeCallback != null) {
8392                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
8393            }
8394            return true;
8395        }
8396
8397        @Override
8398        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
8399            if (mCustomSelectionActionModeCallback != null &&
8400                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
8401                return true;
8402            }
8403            return onTextContextMenuItem(item.getItemId());
8404        }
8405
8406        @Override
8407        public void onDestroyActionMode(ActionMode mode) {
8408            if (mCustomSelectionActionModeCallback != null) {
8409                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
8410            }
8411            Selection.setSelection((Spannable) mText, getSelectionEnd());
8412
8413            if (mSelectionModifierCursorController != null) {
8414                mSelectionModifierCursorController.hide();
8415            }
8416
8417            mSelectionActionMode = null;
8418        }
8419    }
8420
8421    /**
8422     * A CursorController instance can be used to control a cursor in the text.
8423     * It is not used outside of {@link TextView}.
8424     * @hide
8425     */
8426    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
8427        /**
8428         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
8429         * See also {@link #hide()}.
8430         */
8431        public void show();
8432
8433        /**
8434         * Hide the cursor controller from screen.
8435         * See also {@link #show()}.
8436         */
8437        public void hide();
8438
8439        /**
8440         * @return true if the CursorController is currently visible
8441         */
8442        public boolean isShowing();
8443
8444        /**
8445         * Update the controller's position.
8446         */
8447        public void updatePosition(HandleView handle, int x, int y);
8448
8449        public void updateOffset(HandleView handle, int offset);
8450
8451        public void updatePosition();
8452
8453        public int getCurrentOffset(HandleView handle);
8454
8455        /**
8456         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
8457         * a chance to become active and/or visible.
8458         * @param event The touch event
8459         */
8460        public boolean onTouchEvent(MotionEvent event);
8461
8462        /**
8463         * Called when the view is detached from window. Perform house keeping task, such as
8464         * stopping Runnable thread that would otherwise keep a reference on the context, thus
8465         * preventing the activity to be recycled.
8466         */
8467        public void onDetached();
8468    }
8469
8470    private class PastePopupMenu implements OnClickListener {
8471        private final PopupWindow mContainer;
8472        private int mPositionX;
8473        private int mPositionY;
8474        private final View[] mPasteViews = new View[4];
8475        private final int[] mPasteViewLayouts = new int[] {
8476                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
8477                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
8478
8479        public PastePopupMenu() {
8480            mContainer = new PopupWindow(TextView.this.mContext, null,
8481                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8482            mContainer.setSplitTouchEnabled(true);
8483            mContainer.setClippingEnabled(false);
8484            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8485
8486            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8487            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8488        }
8489
8490        private int viewIndex(boolean onTop) {
8491            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
8492        }
8493
8494        private void updateContent(boolean onTop) {
8495            final int viewIndex = viewIndex(onTop);
8496            View view = mPasteViews[viewIndex];
8497
8498            if (view == null) {
8499                final int layout = mPasteViewLayouts[viewIndex];
8500                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8501                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8502                if (inflater != null) {
8503                    view = inflater.inflate(layout, null);
8504                }
8505
8506                if (view == null) {
8507                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
8508                }
8509
8510                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8511                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8512                        ViewGroup.LayoutParams.WRAP_CONTENT));
8513                view.measure(size, size);
8514
8515                view.setOnClickListener(this);
8516
8517                mPasteViews[viewIndex] = view;
8518            }
8519
8520            mContainer.setContentView(view);
8521        }
8522
8523        public void show() {
8524            updateContent(true);
8525            positionAtCursor();
8526        }
8527
8528        public void hide() {
8529            mContainer.dismiss();
8530        }
8531
8532        public boolean isShowing() {
8533            return mContainer.isShowing();
8534        }
8535
8536        @Override
8537        public void onClick(View v) {
8538            if (canPaste()) {
8539                paste(getSelectionStart(), getSelectionEnd());
8540            }
8541            hide();
8542        }
8543
8544        void positionAtCursor() {
8545            View contentView = mContainer.getContentView();
8546            int width = contentView.getMeasuredWidth();
8547            int height = contentView.getMeasuredHeight();
8548            final int offset = TextView.this.getSelectionStart();
8549            final int line = mLayout.getLineForOffset(offset);
8550            final int lineTop = mLayout.getLineTop(line);
8551            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
8552
8553            final Rect bounds = sCursorControllerTempRect;
8554            bounds.left = (int) (primaryHorizontal - width / 2.0f);
8555            bounds.top = lineTop - height;
8556
8557            bounds.right = bounds.left + width;
8558            bounds.bottom = bounds.top + height;
8559
8560            convertFromViewportToContentCoordinates(bounds);
8561
8562            mPositionX = bounds.left;
8563            mPositionY = bounds.top;
8564
8565
8566            final int[] coords = mTempCoords;
8567            TextView.this.getLocationInWindow(coords);
8568            coords[0] += mPositionX;
8569            coords[1] += mPositionY;
8570
8571            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
8572            if (coords[1] < 0) {
8573                updateContent(false);
8574                // Update dimensions from new view
8575                contentView = mContainer.getContentView();
8576                width = contentView.getMeasuredWidth();
8577                height = contentView.getMeasuredHeight();
8578
8579                // Vertical clipping, move under edited line and to the side of insertion cursor
8580                // TODO bottom clipping in case there is no system bar
8581                coords[1] += height;
8582                final int lineBottom = mLayout.getLineBottom(line);
8583                final int lineHeight = lineBottom - lineTop;
8584                coords[1] += lineHeight;
8585
8586                // Move to right hand side of insertion cursor by default. TODO RTL text.
8587                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
8588                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
8589
8590                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
8591                    coords[0] += handleHalfWidth + width / 2;
8592                } else {
8593                    coords[0] -= handleHalfWidth + width / 2;
8594                }
8595            } else {
8596                // Horizontal clipping
8597                coords[0] = Math.max(0, coords[0]);
8598                coords[0] = Math.min(screenWidth - width, coords[0]);
8599            }
8600
8601            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
8602        }
8603    }
8604
8605    private class HandleView extends View {
8606        private Drawable mDrawable;
8607        private final PopupWindow mContainer;
8608        private int mPositionX;
8609        private int mPositionY;
8610        private final CursorController mController;
8611        private boolean mIsDragging;
8612        private float mTouchToWindowOffsetX;
8613        private float mTouchToWindowOffsetY;
8614        private float mHotspotX;
8615        private float mHotspotY;
8616        private int mHeight;
8617        private float mTouchOffsetY;
8618        private int mLastParentX;
8619        private int mLastParentY;
8620        private float mDownPositionX, mDownPositionY;
8621        private int mContainerPositionX, mContainerPositionY;
8622        private long mTouchTimer;
8623        private boolean mIsInsertionHandle = false;
8624        private PastePopupMenu mPastePopupWindow;
8625
8626        // Touch-up filter: number of previous positions remembered
8627        private static final int HISTORY_SIZE = 5;
8628        private static final int TOUCH_UP_FILTER_DELAY = 150;
8629        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
8630        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
8631        private int mPreviousOffsetIndex = 0;
8632        private int mNumberPreviousOffsets = 0;
8633
8634        public void startTouchUpFilter(int offset) {
8635            mNumberPreviousOffsets = 0;
8636            addPositionToTouchUpFilter(offset);
8637        }
8638
8639        public void addPositionToTouchUpFilter(int offset) {
8640            if (mNumberPreviousOffsets > 0 &&
8641                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
8642                // Make sure only actual changes of position are recorded.
8643                return;
8644            }
8645
8646            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
8647            mPreviousOffsets[mPreviousOffsetIndex] = offset;
8648            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
8649            mNumberPreviousOffsets++;
8650        }
8651
8652        public void filterOnTouchUp() {
8653            final long now = SystemClock.uptimeMillis();
8654            int i = 0;
8655            int index = 0;
8656            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
8657            while (i < iMax) {
8658                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
8659                if ((now - mPreviousOffsetsTimes[index]) >= TOUCH_UP_FILTER_DELAY) break;
8660                i++;
8661            }
8662
8663            mController.updateOffset(this, mPreviousOffsets[index]);
8664        }
8665
8666        public static final int LEFT = 0;
8667        public static final int CENTER = 1;
8668        public static final int RIGHT = 2;
8669
8670        public HandleView(CursorController controller, int pos) {
8671            super(TextView.this.mContext);
8672            mController = controller;
8673            mContainer = new PopupWindow(TextView.this.mContext, null,
8674                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8675            mContainer.setSplitTouchEnabled(true);
8676            mContainer.setClippingEnabled(false);
8677            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8678
8679            setOrientation(pos);
8680        }
8681
8682        public void setOrientation(int pos) {
8683            int handleWidth;
8684            switch (pos) {
8685            case LEFT: {
8686                if (mSelectHandleLeft == null) {
8687                    mSelectHandleLeft = mContext.getResources().getDrawable(
8688                            mTextSelectHandleLeftRes);
8689                }
8690                mDrawable = mSelectHandleLeft;
8691                handleWidth = mDrawable.getIntrinsicWidth();
8692                mHotspotX = (handleWidth * 3) / 4;
8693                break;
8694            }
8695
8696            case RIGHT: {
8697                if (mSelectHandleRight == null) {
8698                    mSelectHandleRight = mContext.getResources().getDrawable(
8699                            mTextSelectHandleRightRes);
8700                }
8701                mDrawable = mSelectHandleRight;
8702                handleWidth = mDrawable.getIntrinsicWidth();
8703                mHotspotX = handleWidth / 4;
8704                break;
8705            }
8706
8707            case CENTER:
8708            default: {
8709                if (mSelectHandleCenter == null) {
8710                    mSelectHandleCenter = mContext.getResources().getDrawable(
8711                            mTextSelectHandleRes);
8712                }
8713                mDrawable = mSelectHandleCenter;
8714                handleWidth = mDrawable.getIntrinsicWidth();
8715                mHotspotX = handleWidth / 2;
8716                mIsInsertionHandle = true;
8717                break;
8718            }
8719            }
8720
8721            final int handleHeight = mDrawable.getIntrinsicHeight();
8722
8723            mTouchOffsetY = -handleHeight * 0.3f;
8724            mHotspotY = 0;
8725            mHeight = handleHeight;
8726            invalidate();
8727        }
8728
8729        @Override
8730        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
8731            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
8732                    mDrawable.getIntrinsicHeight());
8733        }
8734
8735        public void show() {
8736            if (!isPositionVisible()) {
8737                hide();
8738                return;
8739            }
8740            mContainer.setContentView(this);
8741            final int[] coords = mTempCoords;
8742            TextView.this.getLocationInWindow(coords);
8743            mContainerPositionX = coords[0] + mPositionX;
8744            mContainerPositionY = coords[1] + mPositionY;
8745            mContainer.showAtLocation(TextView.this, 0, mContainerPositionX, mContainerPositionY);
8746
8747            // Hide paste view when handle is moved on screen.
8748            if (mPastePopupWindow != null) {
8749                mPastePopupWindow.hide();
8750            }
8751        }
8752
8753        public void hide() {
8754            mIsDragging = false;
8755            mContainer.dismiss();
8756            if (mPastePopupWindow != null) {
8757                mPastePopupWindow.hide();
8758            }
8759        }
8760
8761        public boolean isShowing() {
8762            return mContainer.isShowing();
8763        }
8764
8765        private boolean isPositionVisible() {
8766            // Always show a dragging handle.
8767            if (mIsDragging) {
8768                return true;
8769            }
8770
8771            if (isInBatchEditMode()) {
8772                return false;
8773            }
8774
8775            final int extendedPaddingTop = getExtendedPaddingTop();
8776            final int extendedPaddingBottom = getExtendedPaddingBottom();
8777            final int compoundPaddingLeft = getCompoundPaddingLeft();
8778            final int compoundPaddingRight = getCompoundPaddingRight();
8779
8780            final TextView hostView = TextView.this;
8781            final int left = 0;
8782            final int right = hostView.getWidth();
8783            final int top = 0;
8784            final int bottom = hostView.getHeight();
8785
8786            if (mTempRect == null) {
8787                mTempRect = new Rect();
8788            }
8789            final Rect clip = mTempRect;
8790            clip.left = left + compoundPaddingLeft;
8791            clip.top = top + extendedPaddingTop;
8792            clip.right = right - compoundPaddingRight;
8793            clip.bottom = bottom - extendedPaddingBottom;
8794
8795            final ViewParent parent = hostView.getParent();
8796            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
8797                return false;
8798            }
8799
8800            final int[] coords = mTempCoords;
8801            hostView.getLocationInWindow(coords);
8802            final int posX = coords[0] + mPositionX + (int) mHotspotX;
8803            final int posY = coords[1] + mPositionY + (int) mHotspotY;
8804
8805            return posX >= clip.left && posX <= clip.right &&
8806                    posY >= clip.top && posY <= clip.bottom;
8807        }
8808
8809        private void moveTo(int x, int y) {
8810            mPositionX = x - TextView.this.mScrollX;
8811            mPositionY = y - TextView.this.mScrollY;
8812            if (isPositionVisible()) {
8813                int[] coords = null;
8814                if (mContainer.isShowing()) {
8815                    coords = mTempCoords;
8816                    TextView.this.getLocationInWindow(coords);
8817                    final int containerPositionX = coords[0] + mPositionX;
8818                    final int containerPositionY = coords[1] + mPositionY;
8819
8820                    if (containerPositionX != mContainerPositionX ||
8821                        containerPositionY != mContainerPositionY) {
8822                        mContainerPositionX = containerPositionX;
8823                        mContainerPositionY = containerPositionY;
8824
8825                        mContainer.update(mContainerPositionX, mContainerPositionY,
8826                                mRight - mLeft, mBottom - mTop);
8827
8828                        // Hide paste popup window as soon as a scroll occurs.
8829                        if (mPastePopupWindow != null) {
8830                            mPastePopupWindow.hide();
8831                        }
8832                    }
8833                } else {
8834                    show();
8835                }
8836
8837                if (mIsDragging) {
8838                    if (coords == null) {
8839                        coords = mTempCoords;
8840                        TextView.this.getLocationInWindow(coords);
8841                    }
8842                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
8843                        mTouchToWindowOffsetX += coords[0] - mLastParentX;
8844                        mTouchToWindowOffsetY += coords[1] - mLastParentY;
8845                        mLastParentX = coords[0];
8846                        mLastParentY = coords[1];
8847                    }
8848                    // Hide paste popup window as soon as the handle is dragged.
8849                    if (mPastePopupWindow != null) {
8850                        mPastePopupWindow.hide();
8851                    }
8852                }
8853            } else {
8854                hide();
8855            }
8856        }
8857
8858        @Override
8859        protected void onDraw(Canvas c) {
8860            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
8861            mDrawable.draw(c);
8862        }
8863
8864        @Override
8865        public boolean onTouchEvent(MotionEvent ev) {
8866            switch (ev.getActionMasked()) {
8867                case MotionEvent.ACTION_DOWN: {
8868                    startTouchUpFilter(mController.getCurrentOffset(this));
8869                    mDownPositionX = ev.getRawX();
8870                    mDownPositionY = ev.getRawY();
8871                    mTouchToWindowOffsetX = mDownPositionX - mPositionX;
8872                    mTouchToWindowOffsetY = mDownPositionY - mPositionY;
8873                    final int[] coords = mTempCoords;
8874                    TextView.this.getLocationInWindow(coords);
8875                    mLastParentX = coords[0];
8876                    mLastParentY = coords[1];
8877                    mIsDragging = true;
8878                    break;
8879                }
8880
8881                case MotionEvent.ACTION_MOVE: {
8882                    final float rawX = ev.getRawX();
8883                    final float rawY = ev.getRawY();
8884                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
8885                    final float newPosY = rawY - mTouchToWindowOffsetY + mHotspotY + mTouchOffsetY;
8886
8887                    mController.updatePosition(this, Math.round(newPosX), Math.round(newPosY));
8888                    break;
8889                }
8890
8891                case MotionEvent.ACTION_UP:
8892                    if (mIsInsertionHandle) {
8893                        long delay = SystemClock.uptimeMillis() - mTouchTimer;
8894                        if (delay < ViewConfiguration.getTapTimeout()) {
8895                            if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
8896                                // Tapping on the handle dismisses the displayed paste view,
8897                                mPastePopupWindow.hide();
8898                            } else {
8899                                ((InsertionPointCursorController) mController).show(0);
8900                            }
8901                        }
8902                    }
8903                    filterOnTouchUp();
8904                    mIsDragging = false;
8905                    break;
8906
8907                case MotionEvent.ACTION_CANCEL:
8908                    mIsDragging = false;
8909                    break;
8910            }
8911            return true;
8912        }
8913
8914        public boolean isDragging() {
8915            return mIsDragging;
8916        }
8917
8918        void positionAtCursor(final int offset, boolean bottom) {
8919            addPositionToTouchUpFilter(offset);
8920            final int width = mDrawable.getIntrinsicWidth();
8921            final int height = mDrawable.getIntrinsicHeight();
8922            final int line = mLayout.getLineForOffset(offset);
8923            final int lineTop = mLayout.getLineTop(line);
8924            final int lineBottom = mLayout.getLineBottom(line);
8925
8926            final Rect bounds = sCursorControllerTempRect;
8927            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - mHotspotX)
8928                + TextView.this.mScrollX;
8929            bounds.top = (bottom ? lineBottom : lineTop - mHeight) + TextView.this.mScrollY;
8930
8931            bounds.right = bounds.left + width;
8932            bounds.bottom = bounds.top + height;
8933
8934            convertFromViewportToContentCoordinates(bounds);
8935            moveTo(bounds.left, bounds.top);
8936        }
8937
8938        void showPastePopupWindow() {
8939            if (mIsInsertionHandle) {
8940                if (mPastePopupWindow == null) {
8941                    // Lazy initialisation: create when actually shown only.
8942                    mPastePopupWindow = new PastePopupMenu();
8943                }
8944                mPastePopupWindow.show();
8945            }
8946        }
8947    }
8948
8949    private class InsertionPointCursorController implements CursorController {
8950        private static final int DELAY_BEFORE_FADE_OUT = 4100;
8951        private static final int DELAY_BEFORE_PASTE = 2000;
8952        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000;
8953
8954        // The cursor controller image. Lazily created.
8955        private HandleView mHandle;
8956        private Runnable mHider;
8957        private Runnable mPastePopupShower;
8958
8959        public void show() {
8960            show(DELAY_BEFORE_PASTE);
8961        }
8962
8963        public void show(int delayBeforePaste) {
8964            updatePosition();
8965            hideDelayed();
8966            getHandle().show();
8967            removePastePopupCallback();
8968            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
8969            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
8970                delayBeforePaste = 0;
8971            }
8972            if (delayBeforePaste == 0 || canPaste()) {
8973                if (mPastePopupShower == null) {
8974                    mPastePopupShower = new Runnable() {
8975                        public void run() {
8976                            getHandle().showPastePopupWindow();
8977                        }
8978                    };
8979                }
8980                postDelayed(mPastePopupShower, delayBeforePaste);
8981            }
8982        }
8983
8984        private void removePastePopupCallback() {
8985            if (mPastePopupShower != null) {
8986                removeCallbacks(mPastePopupShower);
8987            }
8988        }
8989
8990        private void removeHiderCallback() {
8991            if (mHider != null) {
8992                removeCallbacks(mHider);
8993            }
8994        }
8995
8996        public void hide() {
8997            if (mHandle != null) {
8998                mHandle.hide();
8999            }
9000            removeHiderCallback();
9001            removePastePopupCallback();
9002        }
9003
9004        private void hideDelayed() {
9005            removeHiderCallback();
9006            if (mHider == null) {
9007                mHider = new Runnable() {
9008                    public void run() {
9009                        hide();
9010                    }
9011                };
9012            }
9013            postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
9014        }
9015
9016        public boolean isShowing() {
9017            return mHandle != null && mHandle.isShowing();
9018        }
9019
9020        public void updatePosition(HandleView handle, int x, int y) {
9021            final int previousOffset = getSelectionStart();
9022            int offset = getHysteresisOffset(x, y, previousOffset);
9023
9024            if (offset != previousOffset) {
9025                updateOffset(handle, offset);
9026            }
9027            hideDelayed();
9028        }
9029
9030        public void updateOffset(HandleView handle, int offset) {
9031            Selection.setSelection((Spannable) mText, offset);
9032            updatePosition();
9033        }
9034
9035        public void updatePosition() {
9036            final int offset = getSelectionStart();
9037
9038            if (offset < 0) {
9039                // Should never happen, safety check.
9040                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
9041                hide();
9042                return;
9043            }
9044
9045            getHandle().positionAtCursor(offset, true);
9046        }
9047
9048        public int getCurrentOffset(HandleView handle) {
9049            return getSelectionStart();
9050        }
9051
9052        public boolean onTouchEvent(MotionEvent ev) {
9053            return false;
9054        }
9055
9056        public void onTouchModeChanged(boolean isInTouchMode) {
9057            if (!isInTouchMode) {
9058                hide();
9059            }
9060        }
9061
9062        private HandleView getHandle() {
9063            if (mHandle == null) {
9064                mHandle = new HandleView(this, HandleView.CENTER);
9065            }
9066            return mHandle;
9067        }
9068
9069        @Override
9070        public void onDetached() {
9071            removeHiderCallback();
9072            removePastePopupCallback();
9073        }
9074    }
9075
9076    private class SelectionModifierCursorController implements CursorController {
9077        // The cursor controller images, lazily created when shown.
9078        private HandleView mStartHandle, mEndHandle;
9079        // The offsets of that last touch down event. Remembered to start selection there.
9080        private int mMinTouchOffset, mMaxTouchOffset;
9081        // Whether selection anchors are active
9082        private boolean mIsShowing;
9083
9084        // Double tap detection
9085        private long mPreviousTapUpTime = 0;
9086        private int mPreviousTapPositionX;
9087        private int mPreviousTapPositionY;
9088
9089        SelectionModifierCursorController() {
9090            resetTouchOffsets();
9091        }
9092
9093        public void show() {
9094            if (isInBatchEditMode()) {
9095                return;
9096            }
9097
9098            // Lazy object creation has to be done before updatePosition() is called.
9099            if (mStartHandle == null) mStartHandle = new HandleView(this, HandleView.LEFT);
9100            if (mEndHandle == null) mEndHandle = new HandleView(this, HandleView.RIGHT);
9101
9102            mIsShowing = true;
9103            updatePosition();
9104
9105            mStartHandle.show();
9106            mEndHandle.show();
9107
9108            hideInsertionPointCursorController();
9109        }
9110
9111        public void hide() {
9112            if (mStartHandle != null) mStartHandle.hide();
9113            if (mEndHandle != null) mEndHandle.hide();
9114            mIsShowing = false;
9115        }
9116
9117        public boolean isShowing() {
9118            return mIsShowing;
9119        }
9120
9121        public void cancelFadeOutAnimation() {
9122            hide();
9123        }
9124
9125        public void updatePosition(HandleView handle, int x, int y) {
9126            int selectionStart = getSelectionStart();
9127            int selectionEnd = getSelectionEnd();
9128
9129            final int previousOffset = handle == mStartHandle ? selectionStart : selectionEnd;
9130            int offset = getHysteresisOffset(x, y, previousOffset);
9131
9132            // Handle the case where start and end are swapped, making sure start <= end
9133            if (handle == mStartHandle) {
9134                if (selectionStart == offset || offset > selectionEnd) {
9135                    return; // no change, no need to redraw;
9136                }
9137                // If the user "closes" the selection entirely they were probably trying to
9138                // select a single character. Help them out.
9139                if (offset == selectionEnd) {
9140                    offset = selectionEnd - 1;
9141                }
9142                selectionStart = offset;
9143            } else {
9144                if (selectionEnd == offset || offset < selectionStart) {
9145                    return; // no change, no need to redraw;
9146                }
9147                // If the user "closes" the selection entirely they were probably trying to
9148                // select a single character. Help them out.
9149                if (offset == selectionStart) {
9150                    offset = selectionStart + 1;
9151                }
9152                selectionEnd = offset;
9153            }
9154
9155            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9156            updatePosition();
9157        }
9158
9159        public void updateOffset(HandleView handle, int offset) {
9160            int start = getSelectionStart();
9161            int end = getSelectionEnd();
9162
9163            if (mStartHandle == handle) {
9164                start = offset;
9165            } else {
9166                end = offset;
9167            }
9168
9169            Selection.setSelection((Spannable) mText, start, end);
9170            updatePosition();
9171        }
9172
9173        public void updatePosition() {
9174            if (!isShowing()) {
9175                return;
9176            }
9177
9178            final int selectionStart = getSelectionStart();
9179            final int selectionEnd = getSelectionEnd();
9180
9181            if ((selectionStart < 0) || (selectionEnd < 0)) {
9182                // Should never happen, safety check.
9183                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
9184                hide();
9185                return;
9186            }
9187
9188            // The handles have been created since the controller isShowing().
9189            mStartHandle.positionAtCursor(selectionStart, true);
9190            mEndHandle.positionAtCursor(selectionEnd, true);
9191        }
9192
9193        public int getCurrentOffset(HandleView handle) {
9194            return mStartHandle == handle ? getSelectionStart() : getSelectionEnd();
9195        }
9196
9197        public boolean onTouchEvent(MotionEvent event) {
9198            // This is done even when the View does not have focus, so that long presses can start
9199            // selection and tap can move cursor from this tap position.
9200            if (isTextEditable() || mTextIsSelectable) {
9201                switch (event.getActionMasked()) {
9202                    case MotionEvent.ACTION_DOWN:
9203                        final int x = (int) event.getX();
9204                        final int y = (int) event.getY();
9205
9206                        // Remember finger down position, to be able to start selection from there
9207                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
9208
9209                        // Double tap detection
9210                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
9211                        if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
9212                                isPositionOnText(x, y)) {
9213                            final int deltaX = x - mPreviousTapPositionX;
9214                            final int deltaY = y - mPreviousTapPositionY;
9215                            final int distanceSquared = deltaX * deltaX + deltaY * deltaY;
9216                            if (distanceSquared < mSquaredTouchSlopDistance) {
9217                                startSelectionActionMode();
9218                                mDiscardNextActionUp = true;
9219                            }
9220                        }
9221
9222                        mPreviousTapPositionX = x;
9223                        mPreviousTapPositionY = y;
9224
9225                        break;
9226
9227                    case MotionEvent.ACTION_POINTER_DOWN:
9228                    case MotionEvent.ACTION_POINTER_UP:
9229                        // Handle multi-point gestures. Keep min and max offset positions.
9230                        // Only activated for devices that correctly handle multi-touch.
9231                        if (mContext.getPackageManager().hasSystemFeature(
9232                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
9233                            updateMinAndMaxOffsets(event);
9234                        }
9235                        break;
9236
9237                    case MotionEvent.ACTION_UP:
9238                        mPreviousTapUpTime = SystemClock.uptimeMillis();
9239                        break;
9240                }
9241            }
9242            return false;
9243        }
9244
9245        /**
9246         * @param event
9247         */
9248        private void updateMinAndMaxOffsets(MotionEvent event) {
9249            int pointerCount = event.getPointerCount();
9250            for (int index = 0; index < pointerCount; index++) {
9251                final int x = (int) event.getX(index);
9252                final int y = (int) event.getY(index);
9253                int offset = getOffset(x, y);
9254                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
9255                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
9256            }
9257        }
9258
9259        public int getMinTouchOffset() {
9260            return mMinTouchOffset;
9261        }
9262
9263        public int getMaxTouchOffset() {
9264            return mMaxTouchOffset;
9265        }
9266
9267        public void resetTouchOffsets() {
9268            mMinTouchOffset = mMaxTouchOffset = -1;
9269        }
9270
9271        /**
9272         * @return true iff this controller is currently used to move the selection start.
9273         */
9274        public boolean isSelectionStartDragged() {
9275            return mStartHandle != null && mStartHandle.isDragging();
9276        }
9277
9278        public void onTouchModeChanged(boolean isInTouchMode) {
9279            if (!isInTouchMode) {
9280                hide();
9281            }
9282        }
9283
9284        @Override
9285        public void onDetached() {}
9286    }
9287
9288    private void hideInsertionPointCursorController() {
9289        // No need to create the controller to hide it.
9290        if (mInsertionPointCursorController != null) {
9291            mInsertionPointCursorController.hide();
9292        }
9293    }
9294
9295    /**
9296     * Hides the insertion controller and stops text selection mode, hiding the selection controller
9297     */
9298    private void hideControllers() {
9299        hideInsertionPointCursorController();
9300        stopSelectionActionMode();
9301    }
9302
9303    /**
9304     * Get the offset character closest to the specified absolute position.
9305     *
9306     * @param x The horizontal absolute position of a point on screen
9307     * @param y The vertical absolute position of a point on screen
9308     * @return the character offset for the character whose position is closest to the specified
9309     *  position. Returns -1 if there is no layout.
9310     *
9311     * @hide
9312     */
9313    public int getOffset(int x, int y) {
9314        if (getLayout() == null) return -1;
9315        final int line = getLineAtCoordinate(y);
9316        final int offset = getOffsetAtCoordinate(line, x);
9317        return offset;
9318    }
9319
9320    int getHysteresisOffset(int x, int y, int previousOffset) {
9321        final Layout layout = getLayout();
9322        if (layout == null) return -1;
9323
9324        int line = getLineAtCoordinate(y);
9325        final int previousLine = layout.getLineForOffset(previousOffset);
9326        final int previousLineTop = layout.getLineTop(previousLine);
9327        final int previousLineBottom = layout.getLineBottom(previousLine);
9328        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 8;
9329
9330        // If new line is just before or after previous line and y position is less than
9331        // hysteresisThreshold away from previous line, keep cursor on previous line.
9332        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
9333            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
9334            line = previousLine;
9335        }
9336
9337        return getOffsetAtCoordinate(line, x);
9338    }
9339
9340    private int convertToLocalHorizontalCoordinate(int x) {
9341        x -= getTotalPaddingLeft();
9342        // Clamp the position to inside of the view.
9343        x = Math.max(0, x);
9344        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9345        x += getScrollX();
9346        return x;
9347    }
9348
9349    private int getLineAtCoordinate(int y) {
9350        y -= getTotalPaddingTop();
9351        // Clamp the position to inside of the view.
9352        y = Math.max(0, y);
9353        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9354        y += getScrollY();
9355        return getLayout().getLineForVertical(y);
9356    }
9357
9358    private int getOffsetAtCoordinate(int line, int x) {
9359        x = convertToLocalHorizontalCoordinate(x);
9360        return getLayout().getOffsetForHorizontal(line, x);
9361    }
9362
9363    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
9364     * in the view. Returns false when the position is in the empty space of left/right of text.
9365     */
9366    private boolean isPositionOnText(int x, int y) {
9367        if (getLayout() == null) return false;
9368
9369        final int line = getLineAtCoordinate(y);
9370        x = convertToLocalHorizontalCoordinate(x);
9371
9372        if (x < getLayout().getLineLeft(line)) return false;
9373        if (x > getLayout().getLineRight(line)) return false;
9374        return true;
9375    }
9376
9377    @Override
9378    public boolean onDragEvent(DragEvent event) {
9379        switch (event.getAction()) {
9380            case DragEvent.ACTION_DRAG_STARTED:
9381                return hasInsertionController();
9382
9383            case DragEvent.ACTION_DRAG_ENTERED:
9384                TextView.this.requestFocus();
9385                return true;
9386
9387            case DragEvent.ACTION_DRAG_LOCATION:
9388                final int offset = getOffset((int) event.getX(), (int) event.getY());
9389                Selection.setSelection((Spannable)mText, offset);
9390                return true;
9391
9392            case DragEvent.ACTION_DROP:
9393                onDrop(event);
9394                return true;
9395
9396            case DragEvent.ACTION_DRAG_ENDED:
9397            case DragEvent.ACTION_DRAG_EXITED:
9398            default:
9399                return true;
9400        }
9401    }
9402
9403    private void onDrop(DragEvent event) {
9404        StringBuilder content = new StringBuilder("");
9405        ClipData clipData = event.getClipData();
9406        final int itemCount = clipData.getItemCount();
9407        for (int i=0; i < itemCount; i++) {
9408            Item item = clipData.getItemAt(i);
9409            content.append(item.coerceToText(TextView.this.mContext));
9410        }
9411
9412        final int offset = getOffset((int) event.getX(), (int) event.getY());
9413
9414        Object localState = event.getLocalState();
9415        DragLocalState dragLocalState = null;
9416        if (localState instanceof DragLocalState) {
9417            dragLocalState = (DragLocalState) localState;
9418        }
9419        boolean dragDropIntoItself = dragLocalState != null &&
9420                dragLocalState.sourceTextView == this;
9421
9422        if (dragDropIntoItself) {
9423            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
9424                // A drop inside the original selection discards the drop.
9425                return;
9426            }
9427        }
9428
9429        final int originalLength = mText.length();
9430        long minMax = prepareSpacesAroundPaste(offset, offset, content);
9431        int min = extractRangeStartFromLong(minMax);
9432        int max = extractRangeEndFromLong(minMax);
9433
9434        Selection.setSelection((Spannable) mText, max);
9435        ((Editable) mText).replace(min, max, content);
9436
9437        if (dragDropIntoItself) {
9438            int dragSourceStart = dragLocalState.start;
9439            int dragSourceEnd = dragLocalState.end;
9440            if (max <= dragSourceStart) {
9441                // Inserting text before selection has shifted positions
9442                final int shift = mText.length() - originalLength;
9443                dragSourceStart += shift;
9444                dragSourceEnd += shift;
9445            }
9446
9447            // Delete original selection
9448            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
9449
9450            // Make sure we do not leave two adjacent spaces.
9451            if ((dragSourceStart == 0 ||
9452                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
9453                    (dragSourceStart == mText.length() ||
9454                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
9455                final int pos = dragSourceStart == mText.length() ?
9456                        dragSourceStart - 1 : dragSourceStart;
9457                ((Editable) mText).delete(pos, pos + 1);
9458            }
9459        }
9460    }
9461
9462    /**
9463     * @return True if this view supports insertion handles.
9464     */
9465    boolean hasInsertionController() {
9466        return mInsertionControllerEnabled;
9467    }
9468
9469    /**
9470     * @return True if this view supports selection handles.
9471     */
9472    boolean hasSelectionController() {
9473        return mSelectionControllerEnabled;
9474    }
9475
9476    InsertionPointCursorController getInsertionController() {
9477        if (!mInsertionControllerEnabled) {
9478            return null;
9479        }
9480
9481        if (mInsertionPointCursorController == null) {
9482            mInsertionPointCursorController = new InsertionPointCursorController();
9483
9484            final ViewTreeObserver observer = getViewTreeObserver();
9485            if (observer != null) {
9486                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
9487            }
9488        }
9489
9490        return mInsertionPointCursorController;
9491    }
9492
9493    SelectionModifierCursorController getSelectionController() {
9494        if (!mSelectionControllerEnabled) {
9495            return null;
9496        }
9497
9498        if (mSelectionModifierCursorController == null) {
9499            mSelectionModifierCursorController = new SelectionModifierCursorController();
9500
9501            final ViewTreeObserver observer = getViewTreeObserver();
9502            if (observer != null) {
9503                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
9504            }
9505        }
9506
9507        return mSelectionModifierCursorController;
9508    }
9509
9510    boolean isInBatchEditMode() {
9511        final InputMethodState ims = mInputMethodState;
9512        if (ims != null) {
9513            return ims.mBatchEditNesting > 0;
9514        }
9515        return mInBatchEditControllers;
9516    }
9517
9518    @ViewDebug.ExportedProperty(category = "text")
9519    private CharSequence            mText;
9520    private CharSequence            mTransformed;
9521    private BufferType              mBufferType = BufferType.NORMAL;
9522
9523    private int                     mInputType = EditorInfo.TYPE_NULL;
9524    private CharSequence            mHint;
9525    private Layout                  mHintLayout;
9526
9527    private KeyListener             mInput;
9528
9529    private MovementMethod          mMovement;
9530    private TransformationMethod    mTransformation;
9531    private ChangeWatcher           mChangeWatcher;
9532
9533    private ArrayList<TextWatcher>  mListeners = null;
9534
9535    // display attributes
9536    private final TextPaint         mTextPaint;
9537    private boolean                 mUserSetTextScaleX;
9538    private final Paint             mHighlightPaint;
9539    private int                     mHighlightColor = 0xCC475925;
9540    /**
9541     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
9542     * this field being protected. Will be restored as private when lineHeight
9543     * feature request 3215097 is implemented
9544     * @hide
9545     */
9546    protected Layout                mLayout;
9547
9548    private long                    mShowCursor;
9549    private Blink                   mBlink;
9550    private boolean                 mCursorVisible = true;
9551
9552    // Cursor Controllers.
9553    private InsertionPointCursorController mInsertionPointCursorController;
9554    private SelectionModifierCursorController mSelectionModifierCursorController;
9555    private ActionMode              mSelectionActionMode;
9556    private boolean                 mInsertionControllerEnabled;
9557    private boolean                 mSelectionControllerEnabled;
9558    private boolean                 mInBatchEditControllers;
9559
9560    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
9561    // select from the current cursor position. Otherwise, select from long pressed position.
9562    private boolean                 mDPadCenterIsDown = false;
9563    private boolean                 mEnterKeyIsDown = false;
9564    private boolean                 mContextMenuTriggeredByKey = false;
9565    // Created once and shared by different CursorController helper methods.
9566    // Only one cursor controller is active at any time which prevent race conditions.
9567    private static Rect             sCursorControllerTempRect = new Rect();
9568
9569    private boolean                 mSelectAllOnFocus = false;
9570
9571    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
9572    private boolean                 mHorizontallyScrolling;
9573
9574    private int                     mAutoLinkMask;
9575    private boolean                 mLinksClickable = true;
9576
9577    private float                   mSpacingMult = 1;
9578    private float                   mSpacingAdd = 0;
9579    private boolean                 mTextIsSelectable = false;
9580
9581    private static final int        LINES = 1;
9582    private static final int        EMS = LINES;
9583    private static final int        PIXELS = 2;
9584
9585    private int                     mMaximum = Integer.MAX_VALUE;
9586    private int                     mMaxMode = LINES;
9587    private int                     mMinimum = 0;
9588    private int                     mMinMode = LINES;
9589
9590    private int                     mMaxWidth = Integer.MAX_VALUE;
9591    private int                     mMaxWidthMode = PIXELS;
9592    private int                     mMinWidth = 0;
9593    private int                     mMinWidthMode = PIXELS;
9594
9595    private boolean                 mSingleLine;
9596    private int                     mDesiredHeightAtMeasure = -1;
9597    private boolean                 mIncludePad = true;
9598
9599    // tmp primitives, so we don't alloc them on each draw
9600    private Path                    mHighlightPath;
9601    private boolean                 mHighlightPathBogus = true;
9602    private static final RectF      sTempRect = new RectF();
9603
9604    // XXX should be much larger
9605    private static final int        VERY_WIDE = 16384;
9606
9607    private static final int        BLINK = 500;
9608
9609    private static final int ANIMATED_SCROLL_GAP = 250;
9610    private long mLastScroll;
9611    private Scroller mScroller = null;
9612
9613    private BoringLayout.Metrics mBoring;
9614    private BoringLayout.Metrics mHintBoring;
9615
9616    private BoringLayout mSavedLayout, mSavedHintLayout;
9617
9618    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
9619    private InputFilter[] mFilters = NO_FILTERS;
9620    private static final Spanned EMPTY_SPANNED = new SpannedString("");
9621    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
9622    // System wide time for last cut or copy action.
9623    private static long sLastCutOrCopyTime;
9624    // Used to highlight a word when it is corrected by the IME
9625    private CorrectionHighlighter mCorrectionHighlighter;
9626    // New state used to change background based on whether this TextView is multiline.
9627    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
9628}
9629