TextView.java revision 0ad4f0963a47feafaaa92a756fb84caab5b6bddb 
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), (int) (50 * scale + 0.5f));
3493            mPopup.setFocusable(false);
3494            // The user is entering text, so the input method is needed.  We
3495            // don't want the popup to be displayed on top of it.
3496            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3497        }
3498
3499        TextView tv = (TextView) mPopup.getContentView();
3500        chooseSize(mPopup, mError, tv);
3501        tv.setText(mError);
3502
3503        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3504        mPopup.fixDirection(mPopup.isAboveAnchor());
3505    }
3506
3507    private static class ErrorPopup extends PopupWindow {
3508        private boolean mAbove = false;
3509        private final TextView mView;
3510        private int mPopupInlineErrorBackgroundId = 0;
3511        private int mPopupInlineErrorAboveBackgroundId = 0;
3512
3513        ErrorPopup(TextView v, int width, int height) {
3514            super(v, width, height);
3515            mView = v;
3516            // Make sure the TextView has a background set as it will be used the first time it is
3517            // shown and positionned. Initialized with below background, which should have
3518            // dimensions identical to the above version for this to work (and is more likely).
3519            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3520                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3521            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3522        }
3523
3524        void fixDirection(boolean above) {
3525            mAbove = above;
3526
3527            if (above) {
3528                mPopupInlineErrorAboveBackgroundId =
3529                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3530                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3531            } else {
3532                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3533                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3534            }
3535
3536            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3537                mPopupInlineErrorBackgroundId);
3538        }
3539
3540        private int getResourceId(int currentId, int index) {
3541            if (currentId == 0) {
3542                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3543                        R.styleable.Theme);
3544                currentId = styledAttributes.getResourceId(index, 0);
3545                styledAttributes.recycle();
3546            }
3547            return currentId;
3548        }
3549
3550        @Override
3551        public void update(int x, int y, int w, int h, boolean force) {
3552            super.update(x, y, w, h, force);
3553
3554            boolean above = isAboveAnchor();
3555            if (above != mAbove) {
3556                fixDirection(above);
3557            }
3558        }
3559    }
3560
3561    /**
3562     * Returns the Y offset to make the pointy top of the error point
3563     * at the middle of the error icon.
3564     */
3565    private int getErrorX() {
3566        /*
3567         * The "25" is the distance between the point and the right edge
3568         * of the background
3569         */
3570        final float scale = getResources().getDisplayMetrics().density;
3571
3572        final Drawables dr = mDrawables;
3573        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3574                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3575    }
3576
3577    /**
3578     * Returns the Y offset to make the pointy top of the error point
3579     * at the bottom of the error icon.
3580     */
3581    private int getErrorY() {
3582        /*
3583         * Compound, not extended, because the icon is not clipped
3584         * if the text height is smaller.
3585         */
3586        final int compoundPaddingTop = getCompoundPaddingTop();
3587        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3588
3589        final Drawables dr = mDrawables;
3590        int icontop = compoundPaddingTop +
3591                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3592
3593        /*
3594         * The "2" is the distance between the point and the top edge
3595         * of the background.
3596         */
3597        final float scale = getResources().getDisplayMetrics().density;
3598        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
3599                (int) (2 * scale + 0.5f);
3600    }
3601
3602    private void hideError() {
3603        if (mPopup != null) {
3604            if (mPopup.isShowing()) {
3605                mPopup.dismiss();
3606            }
3607        }
3608
3609        mShowErrorAfterAttach = false;
3610    }
3611
3612    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3613        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3614        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3615
3616        /*
3617         * Figure out how big the text would be if we laid it out to the
3618         * full width of this view minus the border.
3619         */
3620        int cap = getWidth() - wid;
3621        if (cap < 0) {
3622            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3623        }
3624
3625        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3626                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3627        float max = 0;
3628        for (int i = 0; i < l.getLineCount(); i++) {
3629            max = Math.max(max, l.getLineWidth(i));
3630        }
3631
3632        /*
3633         * Now set the popup size to be big enough for the text plus the border.
3634         */
3635        pop.setWidth(wid + (int) Math.ceil(max));
3636        pop.setHeight(ht + l.getHeight());
3637    }
3638
3639
3640    @Override
3641    protected boolean setFrame(int l, int t, int r, int b) {
3642        boolean result = super.setFrame(l, t, r, b);
3643
3644        if (mPopup != null) {
3645            TextView tv = (TextView) mPopup.getContentView();
3646            chooseSize(mPopup, mError, tv);
3647            mPopup.update(this, getErrorX(), getErrorY(),
3648                          mPopup.getWidth(), mPopup.getHeight());
3649        }
3650
3651        restartMarqueeIfNeeded();
3652
3653        return result;
3654    }
3655
3656    private void restartMarqueeIfNeeded() {
3657        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3658            mRestartMarquee = false;
3659            startMarquee();
3660        }
3661    }
3662
3663    /**
3664     * Sets the list of input filters that will be used if the buffer is
3665     * Editable.  Has no effect otherwise.
3666     *
3667     * @attr ref android.R.styleable#TextView_maxLength
3668     */
3669    public void setFilters(InputFilter[] filters) {
3670        if (filters == null) {
3671            throw new IllegalArgumentException();
3672        }
3673
3674        mFilters = filters;
3675
3676        if (mText instanceof Editable) {
3677            setFilters((Editable) mText, filters);
3678        }
3679    }
3680
3681    /**
3682     * Sets the list of input filters on the specified Editable,
3683     * and includes mInput in the list if it is an InputFilter.
3684     */
3685    private void setFilters(Editable e, InputFilter[] filters) {
3686        if (mInput instanceof InputFilter) {
3687            InputFilter[] nf = new InputFilter[filters.length + 1];
3688
3689            System.arraycopy(filters, 0, nf, 0, filters.length);
3690            nf[filters.length] = (InputFilter) mInput;
3691
3692            e.setFilters(nf);
3693        } else {
3694            e.setFilters(filters);
3695        }
3696    }
3697
3698    /**
3699     * Returns the current list of input filters.
3700     */
3701    public InputFilter[] getFilters() {
3702        return mFilters;
3703    }
3704
3705    /////////////////////////////////////////////////////////////////////////
3706
3707    private int getVerticalOffset(boolean forceNormal) {
3708        int voffset = 0;
3709        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3710
3711        Layout l = mLayout;
3712        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3713            l = mHintLayout;
3714        }
3715
3716        if (gravity != Gravity.TOP) {
3717            int boxht;
3718
3719            if (l == mHintLayout) {
3720                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3721                        getCompoundPaddingBottom();
3722            } else {
3723                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3724                        getExtendedPaddingBottom();
3725            }
3726            int textht = l.getHeight();
3727
3728            if (textht < boxht) {
3729                if (gravity == Gravity.BOTTOM)
3730                    voffset = boxht - textht;
3731                else // (gravity == Gravity.CENTER_VERTICAL)
3732                    voffset = (boxht - textht) >> 1;
3733            }
3734        }
3735        return voffset;
3736    }
3737
3738    private int getBottomVerticalOffset(boolean forceNormal) {
3739        int voffset = 0;
3740        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3741
3742        Layout l = mLayout;
3743        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3744            l = mHintLayout;
3745        }
3746
3747        if (gravity != Gravity.BOTTOM) {
3748            int boxht;
3749
3750            if (l == mHintLayout) {
3751                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3752                        getCompoundPaddingBottom();
3753            } else {
3754                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3755                        getExtendedPaddingBottom();
3756            }
3757            int textht = l.getHeight();
3758
3759            if (textht < boxht) {
3760                if (gravity == Gravity.TOP)
3761                    voffset = boxht - textht;
3762                else // (gravity == Gravity.CENTER_VERTICAL)
3763                    voffset = (boxht - textht) >> 1;
3764            }
3765        }
3766        return voffset;
3767    }
3768
3769    private void invalidateCursorPath() {
3770        if (mHighlightPathBogus) {
3771            invalidateCursor();
3772        } else {
3773            synchronized (sTempRect) {
3774                /*
3775                 * The reason for this concern about the thickness of the
3776                 * cursor and doing the floor/ceil on the coordinates is that
3777                 * some EditTexts (notably textfields in the Browser) have
3778                 * anti-aliased text where not all the characters are
3779                 * necessarily at integer-multiple locations.  This should
3780                 * make sure the entire cursor gets invalidated instead of
3781                 * sometimes missing half a pixel.
3782                 */
3783
3784                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3785                if (thick < 1.0f) {
3786                    thick = 1.0f;
3787                }
3788
3789                thick /= 2;
3790
3791                mHighlightPath.computeBounds(sTempRect, false);
3792
3793                int left = getCompoundPaddingLeft();
3794                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3795
3796                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3797                           (int) FloatMath.floor(top + sTempRect.top - thick),
3798                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3799                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3800            }
3801        }
3802    }
3803
3804    private void invalidateCursor() {
3805        int where = getSelectionEnd();
3806
3807        invalidateCursor(where, where, where);
3808    }
3809
3810    private void invalidateCursor(int a, int b, int c) {
3811        if (mLayout == null) {
3812            invalidate();
3813        } else {
3814            if (a >= 0 || b >= 0 || c >= 0) {
3815                int first = Math.min(Math.min(a, b), c);
3816                int last = Math.max(Math.max(a, b), c);
3817
3818                int line = mLayout.getLineForOffset(first);
3819                int top = mLayout.getLineTop(line);
3820
3821                // This is ridiculous, but the descent from the line above
3822                // can hang down into the line we really want to redraw,
3823                // so we have to invalidate part of the line above to make
3824                // sure everything that needs to be redrawn really is.
3825                // (But not the whole line above, because that would cause
3826                // the same problem with the descenders on the line above it!)
3827                if (line > 0) {
3828                    top -= mLayout.getLineDescent(line - 1);
3829                }
3830
3831                int line2;
3832
3833                if (first == last)
3834                    line2 = line;
3835                else
3836                    line2 = mLayout.getLineForOffset(last);
3837
3838                int bottom = mLayout.getLineTop(line2 + 1);
3839                int voffset = getVerticalOffset(true);
3840
3841                int left = getCompoundPaddingLeft() + mScrollX;
3842                invalidate(left, top + voffset + getExtendedPaddingTop(),
3843                           left + getWidth() - getCompoundPaddingLeft() -
3844                           getCompoundPaddingRight(),
3845                           bottom + voffset + getExtendedPaddingTop());
3846            }
3847        }
3848    }
3849
3850    private void registerForPreDraw() {
3851        final ViewTreeObserver observer = getViewTreeObserver();
3852        if (observer == null) {
3853            return;
3854        }
3855
3856        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3857            observer.addOnPreDrawListener(this);
3858            mPreDrawState = PREDRAW_PENDING;
3859        } else if (mPreDrawState == PREDRAW_DONE) {
3860            mPreDrawState = PREDRAW_PENDING;
3861        }
3862
3863        // else state is PREDRAW_PENDING, so keep waiting.
3864    }
3865
3866    /**
3867     * {@inheritDoc}
3868     */
3869    public boolean onPreDraw() {
3870        if (mPreDrawState != PREDRAW_PENDING) {
3871            return true;
3872        }
3873
3874        if (mLayout == null) {
3875            assumeLayout();
3876        }
3877
3878        boolean changed = false;
3879
3880        if (mMovement != null) {
3881            /* This code also provides auto-scrolling when a cursor is moved using a
3882             * CursorController (insertion point or selection limits).
3883             * For selection, ensure start or end is visible depending on controller's state.
3884             */
3885            int curs = getSelectionEnd();
3886            // Do not create the controller if it is not already created.
3887            if (mSelectionModifierCursorController != null &&
3888                    mSelectionModifierCursorController.isSelectionStartDragged()) {
3889                curs = getSelectionStart();
3890            }
3891
3892            /*
3893             * TODO: This should really only keep the end in view if
3894             * it already was before the text changed.  I'm not sure
3895             * of a good way to tell from here if it was.
3896             */
3897            if (curs < 0 &&
3898                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3899                curs = mText.length();
3900            }
3901
3902            if (curs >= 0) {
3903                changed = bringPointIntoView(curs);
3904            }
3905        } else {
3906            changed = bringTextIntoView();
3907        }
3908
3909        // This has to be checked here since:
3910        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3911        //   a screen rotation) since layout is not yet initialized at that point.
3912        if (mCreatedWithASelection) {
3913            startSelectionActionMode();
3914            mCreatedWithASelection = false;
3915        }
3916
3917        // Phone specific code (there is no ExtractEditText on tablets).
3918        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
3919        // not be set. Do the test here instead.
3920        if (this instanceof ExtractEditText && hasSelection()) {
3921            startSelectionActionMode();
3922        }
3923
3924        mPreDrawState = PREDRAW_DONE;
3925        return !changed;
3926    }
3927
3928    @Override
3929    protected void onAttachedToWindow() {
3930        super.onAttachedToWindow();
3931
3932        mTemporaryDetach = false;
3933
3934        if (mShowErrorAfterAttach) {
3935            showError();
3936            mShowErrorAfterAttach = false;
3937        }
3938
3939        final ViewTreeObserver observer = getViewTreeObserver();
3940        if (observer != null) {
3941            // No need to create the controller.
3942            // The get method will add the listener on controller creation.
3943            if (mInsertionPointCursorController != null) {
3944                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3945            }
3946            if (mSelectionModifierCursorController != null) {
3947                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3948            }
3949        }
3950    }
3951
3952    @Override
3953    protected void onDetachedFromWindow() {
3954        super.onDetachedFromWindow();
3955
3956        final ViewTreeObserver observer = getViewTreeObserver();
3957        if (observer != null) {
3958            if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3959                observer.removeOnPreDrawListener(this);
3960                mPreDrawState = PREDRAW_NOT_REGISTERED;
3961            }
3962            // No need to create the controller, as getXXController would.
3963            if (mInsertionPointCursorController != null) {
3964                observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3965            }
3966            if (mSelectionModifierCursorController != null) {
3967                observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3968            }
3969        }
3970
3971        if (mError != null) {
3972            hideError();
3973        }
3974
3975        if (mBlink != null) {
3976            mBlink.cancel();
3977        }
3978
3979        if (mInsertionPointCursorController != null) {
3980            mInsertionPointCursorController.onDetached();
3981        }
3982
3983        if (mSelectionModifierCursorController != null) {
3984            mSelectionModifierCursorController.onDetached();
3985        }
3986
3987        hideControllers();
3988    }
3989
3990    @Override
3991    protected boolean isPaddingOffsetRequired() {
3992        return mShadowRadius != 0 || mDrawables != null;
3993    }
3994
3995    @Override
3996    protected int getLeftPaddingOffset() {
3997        return getCompoundPaddingLeft() - mPaddingLeft +
3998                (int) Math.min(0, mShadowDx - mShadowRadius);
3999    }
4000
4001    @Override
4002    protected int getTopPaddingOffset() {
4003        return (int) Math.min(0, mShadowDy - mShadowRadius);
4004    }
4005
4006    @Override
4007    protected int getBottomPaddingOffset() {
4008        return (int) Math.max(0, mShadowDy + mShadowRadius);
4009    }
4010
4011    @Override
4012    protected int getRightPaddingOffset() {
4013        return -(getCompoundPaddingRight() - mPaddingRight) +
4014                (int) Math.max(0, mShadowDx + mShadowRadius);
4015    }
4016
4017    @Override
4018    protected boolean verifyDrawable(Drawable who) {
4019        final boolean verified = super.verifyDrawable(who);
4020        if (!verified && mDrawables != null) {
4021            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4022                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
4023        }
4024        return verified;
4025    }
4026
4027    @Override
4028    public void jumpDrawablesToCurrentState() {
4029        super.jumpDrawablesToCurrentState();
4030        if (mDrawables != null) {
4031            if (mDrawables.mDrawableLeft != null) {
4032                mDrawables.mDrawableLeft.jumpToCurrentState();
4033            }
4034            if (mDrawables.mDrawableTop != null) {
4035                mDrawables.mDrawableTop.jumpToCurrentState();
4036            }
4037            if (mDrawables.mDrawableRight != null) {
4038                mDrawables.mDrawableRight.jumpToCurrentState();
4039            }
4040            if (mDrawables.mDrawableBottom != null) {
4041                mDrawables.mDrawableBottom.jumpToCurrentState();
4042            }
4043        }
4044    }
4045
4046    @Override
4047    public void invalidateDrawable(Drawable drawable) {
4048        if (verifyDrawable(drawable)) {
4049            final Rect dirty = drawable.getBounds();
4050            int scrollX = mScrollX;
4051            int scrollY = mScrollY;
4052
4053            // IMPORTANT: The coordinates below are based on the coordinates computed
4054            // for each compound drawable in onDraw(). Make sure to update each section
4055            // accordingly.
4056            final TextView.Drawables drawables = mDrawables;
4057            if (drawables != null) {
4058                if (drawable == drawables.mDrawableLeft) {
4059                    final int compoundPaddingTop = getCompoundPaddingTop();
4060                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4061                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4062
4063                    scrollX += mPaddingLeft;
4064                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4065                } else if (drawable == drawables.mDrawableRight) {
4066                    final int compoundPaddingTop = getCompoundPaddingTop();
4067                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4068                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4069
4070                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4071                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4072                } else if (drawable == drawables.mDrawableTop) {
4073                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4074                    final int compoundPaddingRight = getCompoundPaddingRight();
4075                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4076
4077                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4078                    scrollY += mPaddingTop;
4079                } else if (drawable == drawables.mDrawableBottom) {
4080                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4081                    final int compoundPaddingRight = getCompoundPaddingRight();
4082                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4083
4084                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4085                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4086                }
4087            }
4088
4089            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4090                    dirty.right + scrollX, dirty.bottom + scrollY);
4091        }
4092    }
4093
4094    @Override
4095    protected boolean onSetAlpha(int alpha) {
4096        // Alpha is supported if and only if the drawing can be done in one pass.
4097        // TODO text with spans with a background color currently do not respect this alpha.
4098        if (getBackground() == null) {
4099            mCurrentAlpha = alpha;
4100            final Drawables dr = mDrawables;
4101            if (dr != null) {
4102                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4103                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4104                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4105                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4106            }
4107            return true;
4108        }
4109
4110        mCurrentAlpha = 255;
4111        return false;
4112    }
4113
4114    /**
4115     * When a TextView is used to display a useful piece of information to the user (such as a
4116     * contact's address), it should be made selectable, so that the user can select and copy this
4117     * content.
4118     *
4119     * Use {@link #setTextIsSelectable(boolean)} or the
4120     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4121     * selectable (text is not selectable by default).
4122     *
4123     * Note that the content of an EditText is always selectable.
4124     *
4125     * @return True if the text displayed in this TextView can be selected by the user.
4126     *
4127     * @attr ref android.R.styleable#TextView_textIsSelectable
4128     */
4129    public boolean isTextSelectable() {
4130        return mTextIsSelectable;
4131    }
4132
4133    /**
4134     * Sets whether or not (default) the content of this view is selectable by the user.
4135     *
4136     * Note that this methods affect the {@link #setFocusable(boolean)},
4137     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4138     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4139     * customized.
4140     *
4141     * See {@link #isTextSelectable} for details.
4142     *
4143     * @param selectable Whether or not the content of this TextView should be selectable.
4144     */
4145    public void setTextIsSelectable(boolean selectable) {
4146        if (mTextIsSelectable == selectable) return;
4147
4148        mTextIsSelectable = selectable;
4149
4150        setFocusableInTouchMode(selectable);
4151        setFocusable(selectable);
4152        setClickable(selectable);
4153        setLongClickable(selectable);
4154
4155        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4156
4157        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4158        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4159
4160        // Called by setText above, but safer in case of future code changes
4161        prepareCursorControllers();
4162    }
4163
4164    @Override
4165    protected int[] onCreateDrawableState(int extraSpace) {
4166        final int[] drawableState;
4167
4168        if (mSingleLine) {
4169            drawableState = super.onCreateDrawableState(extraSpace);
4170        } else {
4171            drawableState = super.onCreateDrawableState(extraSpace + 1);
4172            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4173        }
4174
4175        if (mTextIsSelectable) {
4176            // Disable pressed state, which was introduced when TextView was made clickable.
4177            // Prevents text color change.
4178            // setClickable(false) would have a similar effect, but it also disables focus changes
4179            // and long press actions, which are both needed by text selection.
4180            final int length = drawableState.length;
4181            for (int i = 0; i < length; i++) {
4182                if (drawableState[i] == R.attr.state_pressed) {
4183                    final int[] nonPressedState = new int[length - 1];
4184                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4185                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4186                    return nonPressedState;
4187                }
4188            }
4189        }
4190
4191        return drawableState;
4192    }
4193
4194    @Override
4195    protected void onDraw(Canvas canvas) {
4196        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4197
4198        restartMarqueeIfNeeded();
4199
4200        // Draw the background for this view
4201        super.onDraw(canvas);
4202
4203        final int compoundPaddingLeft = getCompoundPaddingLeft();
4204        final int compoundPaddingTop = getCompoundPaddingTop();
4205        final int compoundPaddingRight = getCompoundPaddingRight();
4206        final int compoundPaddingBottom = getCompoundPaddingBottom();
4207        final int scrollX = mScrollX;
4208        final int scrollY = mScrollY;
4209        final int right = mRight;
4210        final int left = mLeft;
4211        final int bottom = mBottom;
4212        final int top = mTop;
4213
4214        final Drawables dr = mDrawables;
4215        if (dr != null) {
4216            /*
4217             * Compound, not extended, because the icon is not clipped
4218             * if the text height is smaller.
4219             */
4220
4221            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4222            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4223
4224            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4225            // Make sure to update invalidateDrawable() when changing this code.
4226            if (dr.mDrawableLeft != null) {
4227                canvas.save();
4228                canvas.translate(scrollX + mPaddingLeft,
4229                                 scrollY + compoundPaddingTop +
4230                                 (vspace - dr.mDrawableHeightLeft) / 2);
4231                dr.mDrawableLeft.draw(canvas);
4232                canvas.restore();
4233            }
4234
4235            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4236            // Make sure to update invalidateDrawable() when changing this code.
4237            if (dr.mDrawableRight != null) {
4238                canvas.save();
4239                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4240                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4241                dr.mDrawableRight.draw(canvas);
4242                canvas.restore();
4243            }
4244
4245            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4246            // Make sure to update invalidateDrawable() when changing this code.
4247            if (dr.mDrawableTop != null) {
4248                canvas.save();
4249                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4250                        scrollY + mPaddingTop);
4251                dr.mDrawableTop.draw(canvas);
4252                canvas.restore();
4253            }
4254
4255            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4256            // Make sure to update invalidateDrawable() when changing this code.
4257            if (dr.mDrawableBottom != null) {
4258                canvas.save();
4259                canvas.translate(scrollX + compoundPaddingLeft +
4260                        (hspace - dr.mDrawableWidthBottom) / 2,
4261                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4262                dr.mDrawableBottom.draw(canvas);
4263                canvas.restore();
4264            }
4265        }
4266
4267        if (mPreDrawState == PREDRAW_DONE) {
4268            final ViewTreeObserver observer = getViewTreeObserver();
4269            if (observer != null) {
4270                observer.removeOnPreDrawListener(this);
4271                mPreDrawState = PREDRAW_NOT_REGISTERED;
4272            }
4273        }
4274
4275        int color = mCurTextColor;
4276
4277        if (mLayout == null) {
4278            assumeLayout();
4279        }
4280
4281        Layout layout = mLayout;
4282        int cursorcolor = color;
4283
4284        if (mHint != null && mText.length() == 0) {
4285            if (mHintTextColor != null) {
4286                color = mCurHintTextColor;
4287            }
4288
4289            layout = mHintLayout;
4290        }
4291
4292        mTextPaint.setColor(color);
4293        if (mCurrentAlpha != 255) {
4294            // If set, the alpha will override the color's alpha. Multiply the alphas.
4295            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4296        }
4297        mTextPaint.drawableState = getDrawableState();
4298
4299        canvas.save();
4300        /*  Would be faster if we didn't have to do this. Can we chop the
4301            (displayable) text so that we don't need to do this ever?
4302        */
4303
4304        int extendedPaddingTop = getExtendedPaddingTop();
4305        int extendedPaddingBottom = getExtendedPaddingBottom();
4306
4307        float clipLeft = compoundPaddingLeft + scrollX;
4308        float clipTop = extendedPaddingTop + scrollY;
4309        float clipRight = right - left - compoundPaddingRight + scrollX;
4310        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4311
4312        if (mShadowRadius != 0) {
4313            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4314            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4315
4316            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4317            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4318        }
4319
4320        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4321
4322        int voffsetText = 0;
4323        int voffsetCursor = 0;
4324
4325        // translate in by our padding
4326        {
4327            /* shortcircuit calling getVerticaOffset() */
4328            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4329                voffsetText = getVerticalOffset(false);
4330                voffsetCursor = getVerticalOffset(true);
4331            }
4332            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4333        }
4334
4335        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4336            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4337                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4338                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4339                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4340            }
4341
4342            if (mMarquee != null && mMarquee.isRunning()) {
4343                canvas.translate(-mMarquee.mScroll, 0.0f);
4344            }
4345        }
4346
4347        Path highlight = null;
4348        int selStart = -1, selEnd = -1;
4349
4350        //  If there is no movement method, then there can be no selection.
4351        //  Check that first and attempt to skip everything having to do with
4352        //  the cursor.
4353        //  XXX This is not strictly true -- a program could set the
4354        //  selection manually if it really wanted to.
4355        if (mMovement != null && (isFocused() || isPressed())) {
4356            selStart = getSelectionStart();
4357            selEnd = getSelectionEnd();
4358
4359            if ((isCursorVisible() || mTextIsSelectable) && selStart >= 0 && isEnabled()) {
4360                if (mHighlightPath == null)
4361                    mHighlightPath = new Path();
4362
4363                if (selStart == selEnd) {
4364                    if (!mTextIsSelectable &&
4365                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4366                        if (mHighlightPathBogus) {
4367                            mHighlightPath.reset();
4368                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4369                            mHighlightPathBogus = false;
4370                        }
4371
4372                        // XXX should pass to skin instead of drawing directly
4373                        mHighlightPaint.setColor(cursorcolor);
4374                        if (mCurrentAlpha != 255) {
4375                            mHighlightPaint.setAlpha(
4376                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4377                        }
4378                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4379
4380                        highlight = mHighlightPath;
4381                    }
4382                } else {
4383                    if (mHighlightPathBogus) {
4384                        mHighlightPath.reset();
4385                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4386                        mHighlightPathBogus = false;
4387                    }
4388
4389                    // XXX should pass to skin instead of drawing directly
4390                    mHighlightPaint.setColor(mHighlightColor);
4391                    if (mCurrentAlpha != 255) {
4392                        mHighlightPaint.setAlpha(
4393                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4394                    }
4395                    mHighlightPaint.setStyle(Paint.Style.FILL);
4396
4397                    highlight = mHighlightPath;
4398                }
4399            }
4400        }
4401
4402        /*  Comment out until we decide what to do about animations
4403        boolean isLinearTextOn = false;
4404        if (currentTransformation != null) {
4405            isLinearTextOn = mTextPaint.isLinearTextOn();
4406            Matrix m = currentTransformation.getMatrix();
4407            if (!m.isIdentity()) {
4408                // mTextPaint.setLinearTextOn(true);
4409            }
4410        }
4411        */
4412
4413        final InputMethodState ims = mInputMethodState;
4414        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4415        if (ims != null && ims.mBatchEditNesting == 0) {
4416            InputMethodManager imm = InputMethodManager.peekInstance();
4417            if (imm != null) {
4418                if (imm.isActive(this)) {
4419                    boolean reported = false;
4420                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4421                        // We are in extract mode and the content has changed
4422                        // in some way... just report complete new text to the
4423                        // input method.
4424                        reported = reportExtractedText();
4425                    }
4426                    if (!reported && highlight != null) {
4427                        int candStart = -1;
4428                        int candEnd = -1;
4429                        if (mText instanceof Spannable) {
4430                            Spannable sp = (Spannable)mText;
4431                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4432                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4433                        }
4434                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4435                    }
4436                }
4437
4438                if (imm.isWatchingCursor(this) && highlight != null) {
4439                    highlight.computeBounds(ims.mTmpRectF, true);
4440                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4441
4442                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4443                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4444
4445                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4446
4447                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4448                            (int)(ims.mTmpRectF.top + 0.5),
4449                            (int)(ims.mTmpRectF.right + 0.5),
4450                            (int)(ims.mTmpRectF.bottom + 0.5));
4451
4452                    imm.updateCursor(this,
4453                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4454                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4455                }
4456            }
4457        }
4458
4459        if (mCorrectionHighlighter != null) {
4460            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4461        }
4462
4463        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4464
4465        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4466            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4467            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4468        }
4469
4470        /*  Comment out until we decide what to do about animations
4471        if (currentTransformation != null) {
4472            mTextPaint.setLinearTextOn(isLinearTextOn);
4473        }
4474        */
4475
4476        canvas.restore();
4477
4478        updateCursorControllerPositions();
4479    }
4480
4481    /**
4482     * Update the positions of the CursorControllers.  Needed by WebTextView,
4483     * which does not draw.
4484     * @hide
4485     */
4486    protected void updateCursorControllerPositions() {
4487        // No need to create the controllers if they were not already
4488        if (mInsertionPointCursorController != null &&
4489                mInsertionPointCursorController.isShowing()) {
4490            mInsertionPointCursorController.updatePosition();
4491        }
4492        if (mSelectionModifierCursorController != null &&
4493                mSelectionModifierCursorController.isShowing()) {
4494            mSelectionModifierCursorController.updatePosition();
4495        }
4496    }
4497
4498    @Override
4499    public void getFocusedRect(Rect r) {
4500        if (mLayout == null) {
4501            super.getFocusedRect(r);
4502            return;
4503        }
4504
4505        int sel = getSelectionEnd();
4506        if (sel < 0) {
4507            super.getFocusedRect(r);
4508            return;
4509        }
4510
4511        int line = mLayout.getLineForOffset(sel);
4512        r.top = mLayout.getLineTop(line);
4513        r.bottom = mLayout.getLineBottom(line);
4514
4515        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4516        r.right = r.left + 1;
4517
4518        // Adjust for padding and gravity.
4519        int paddingLeft = getCompoundPaddingLeft();
4520        int paddingTop = getExtendedPaddingTop();
4521        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4522            paddingTop += getVerticalOffset(false);
4523        }
4524        r.offset(paddingLeft, paddingTop);
4525    }
4526
4527    /**
4528     * Return the number of lines of text, or 0 if the internal Layout has not
4529     * been built.
4530     */
4531    public int getLineCount() {
4532        return mLayout != null ? mLayout.getLineCount() : 0;
4533    }
4534
4535    /**
4536     * Return the baseline for the specified line (0...getLineCount() - 1)
4537     * If bounds is not null, return the top, left, right, bottom extents
4538     * of the specified line in it. If the internal Layout has not been built,
4539     * return 0 and set bounds to (0, 0, 0, 0)
4540     * @param line which line to examine (0..getLineCount() - 1)
4541     * @param bounds Optional. If not null, it returns the extent of the line
4542     * @return the Y-coordinate of the baseline
4543     */
4544    public int getLineBounds(int line, Rect bounds) {
4545        if (mLayout == null) {
4546            if (bounds != null) {
4547                bounds.set(0, 0, 0, 0);
4548            }
4549            return 0;
4550        }
4551        else {
4552            int baseline = mLayout.getLineBounds(line, bounds);
4553
4554            int voffset = getExtendedPaddingTop();
4555            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4556                voffset += getVerticalOffset(true);
4557            }
4558            if (bounds != null) {
4559                bounds.offset(getCompoundPaddingLeft(), voffset);
4560            }
4561            return baseline + voffset;
4562        }
4563    }
4564
4565    @Override
4566    public int getBaseline() {
4567        if (mLayout == null) {
4568            return super.getBaseline();
4569        }
4570
4571        int voffset = 0;
4572        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4573            voffset = getVerticalOffset(true);
4574        }
4575
4576        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4577    }
4578
4579    @Override
4580    public boolean onKeyDown(int keyCode, KeyEvent event) {
4581        int which = doKeyDown(keyCode, event, null);
4582        if (which == 0) {
4583            // Go through default dispatching.
4584            return super.onKeyDown(keyCode, event);
4585        }
4586
4587        return true;
4588    }
4589
4590    @Override
4591    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4592        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4593
4594        int which = doKeyDown(keyCode, down, event);
4595        if (which == 0) {
4596            // Go through default dispatching.
4597            return super.onKeyMultiple(keyCode, repeatCount, event);
4598        }
4599        if (which == -1) {
4600            // Consumed the whole thing.
4601            return true;
4602        }
4603
4604        repeatCount--;
4605
4606        // We are going to dispatch the remaining events to either the input
4607        // or movement method.  To do this, we will just send a repeated stream
4608        // of down and up events until we have done the complete repeatCount.
4609        // It would be nice if those interfaces had an onKeyMultiple() method,
4610        // but adding that is a more complicated change.
4611        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4612        if (which == 1) {
4613            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4614            while (--repeatCount > 0) {
4615                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4616                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4617            }
4618            hideErrorIfUnchanged();
4619
4620        } else if (which == 2) {
4621            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4622            while (--repeatCount > 0) {
4623                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4624                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4625            }
4626        }
4627
4628        return true;
4629    }
4630
4631    /**
4632     * Returns true if pressing ENTER in this field advances focus instead
4633     * of inserting the character.  This is true mostly in single-line fields,
4634     * but also in mail addresses and subjects which will display on multiple
4635     * lines but where it doesn't make sense to insert newlines.
4636     */
4637    private boolean shouldAdvanceFocusOnEnter() {
4638        if (mInput == null) {
4639            return false;
4640        }
4641
4642        if (mSingleLine) {
4643            return true;
4644        }
4645
4646        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4647            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4648            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4649                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4650                return true;
4651            }
4652        }
4653
4654        return false;
4655    }
4656
4657    /**
4658     * Returns true if pressing TAB in this field advances focus instead
4659     * of inserting the character.  Insert tabs only in multi-line editors.
4660     */
4661    private boolean shouldAdvanceFocusOnTab() {
4662        if (mInput != null && !mSingleLine) {
4663            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4664                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4665                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4666                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4667                    return false;
4668                }
4669            }
4670        }
4671        return true;
4672    }
4673
4674    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4675        if (!isEnabled()) {
4676            return 0;
4677        }
4678
4679        switch (keyCode) {
4680            case KeyEvent.KEYCODE_ENTER:
4681                mEnterKeyIsDown = true;
4682                if (event.hasNoModifiers()) {
4683                    // When mInputContentType is set, we know that we are
4684                    // running in a "modern" cupcake environment, so don't need
4685                    // to worry about the application trying to capture
4686                    // enter key events.
4687                    if (mInputContentType != null) {
4688                        // If there is an action listener, given them a
4689                        // chance to consume the event.
4690                        if (mInputContentType.onEditorActionListener != null &&
4691                                mInputContentType.onEditorActionListener.onEditorAction(
4692                                this, EditorInfo.IME_NULL, event)) {
4693                            mInputContentType.enterDown = true;
4694                            // We are consuming the enter key for them.
4695                            return -1;
4696                        }
4697                    }
4698
4699                    // If our editor should move focus when enter is pressed, or
4700                    // this is a generated event from an IME action button, then
4701                    // don't let it be inserted into the text.
4702                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4703                            || shouldAdvanceFocusOnEnter()) {
4704                        if (mOnClickListener != null) {
4705                            return 0;
4706                        }
4707                        return -1;
4708                    }
4709                }
4710                break;
4711
4712            case KeyEvent.KEYCODE_DPAD_CENTER:
4713                mDPadCenterIsDown = true;
4714                if (event.hasNoModifiers()) {
4715                    if (shouldAdvanceFocusOnEnter()) {
4716                        return 0;
4717                    }
4718                }
4719                break;
4720
4721            case KeyEvent.KEYCODE_TAB:
4722                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
4723                    if (shouldAdvanceFocusOnTab()) {
4724                        return 0;
4725                    }
4726                }
4727                break;
4728
4729                // Has to be done on key down (and not on key up) to correctly be intercepted.
4730            case KeyEvent.KEYCODE_BACK:
4731                if (mSelectionActionMode != null) {
4732                    stopSelectionActionMode();
4733                    return -1;
4734                }
4735                break;
4736        }
4737
4738        if (mInput != null) {
4739            resetErrorChangedFlag();
4740
4741            boolean doDown = true;
4742            if (otherEvent != null) {
4743                try {
4744                    beginBatchEdit();
4745                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
4746                    hideErrorIfUnchanged();
4747                    doDown = false;
4748                    if (handled) {
4749                        return -1;
4750                    }
4751                } catch (AbstractMethodError e) {
4752                    // onKeyOther was added after 1.0, so if it isn't
4753                    // implemented we need to try to dispatch as a regular down.
4754                } finally {
4755                    endBatchEdit();
4756                }
4757            }
4758
4759            if (doDown) {
4760                beginBatchEdit();
4761                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
4762                endBatchEdit();
4763                hideErrorIfUnchanged();
4764                if (handled) return 1;
4765            }
4766        }
4767
4768        // bug 650865: sometimes we get a key event before a layout.
4769        // don't try to move around if we don't know the layout.
4770
4771        if (mMovement != null && mLayout != null) {
4772            boolean doDown = true;
4773            if (otherEvent != null) {
4774                try {
4775                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4776                            otherEvent);
4777                    doDown = false;
4778                    if (handled) {
4779                        return -1;
4780                    }
4781                } catch (AbstractMethodError e) {
4782                    // onKeyOther was added after 1.0, so if it isn't
4783                    // implemented we need to try to dispatch as a regular down.
4784                }
4785            }
4786            if (doDown) {
4787                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4788                    return 2;
4789            }
4790        }
4791
4792        return 0;
4793    }
4794
4795    /**
4796     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
4797     * can be recorded.
4798     * @hide
4799     */
4800    public void resetErrorChangedFlag() {
4801        /*
4802         * Keep track of what the error was before doing the input
4803         * so that if an input filter changed the error, we leave
4804         * that error showing.  Otherwise, we take down whatever
4805         * error was showing when the user types something.
4806         */
4807        mErrorWasChanged = false;
4808    }
4809
4810    /**
4811     * @hide
4812     */
4813    public void hideErrorIfUnchanged() {
4814        if (mError != null && !mErrorWasChanged) {
4815            setError(null, null);
4816        }
4817    }
4818
4819    @Override
4820    public boolean onKeyUp(int keyCode, KeyEvent event) {
4821        if (!isEnabled()) {
4822            return super.onKeyUp(keyCode, event);
4823        }
4824
4825        switch (keyCode) {
4826            case KeyEvent.KEYCODE_DPAD_CENTER:
4827                mDPadCenterIsDown = false;
4828                if (event.hasNoModifiers()) {
4829                    /*
4830                     * If there is a click listener, just call through to
4831                     * super, which will invoke it.
4832                     *
4833                     * If there isn't a click listener, try to show the soft
4834                     * input method.  (It will also
4835                     * call performClick(), but that won't do anything in
4836                     * this case.)
4837                     */
4838                    if (mOnClickListener == null) {
4839                        if (mMovement != null && mText instanceof Editable
4840                                && mLayout != null && onCheckIsTextEditor()) {
4841                            InputMethodManager imm = InputMethodManager.peekInstance();
4842                            if (imm != null) imm.showSoftInput(this, 0);
4843                        }
4844                    }
4845                }
4846                return super.onKeyUp(keyCode, event);
4847
4848            case KeyEvent.KEYCODE_ENTER:
4849                mEnterKeyIsDown = false;
4850                if (event.hasNoModifiers()) {
4851                    if (mInputContentType != null
4852                            && mInputContentType.onEditorActionListener != null
4853                            && mInputContentType.enterDown) {
4854                        mInputContentType.enterDown = false;
4855                        if (mInputContentType.onEditorActionListener.onEditorAction(
4856                                this, EditorInfo.IME_NULL, event)) {
4857                            return true;
4858                        }
4859                    }
4860
4861                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4862                            || shouldAdvanceFocusOnEnter()) {
4863                        /*
4864                         * If there is a click listener, just call through to
4865                         * super, which will invoke it.
4866                         *
4867                         * If there isn't a click listener, try to advance focus,
4868                         * but still call through to super, which will reset the
4869                         * pressed state and longpress state.  (It will also
4870                         * call performClick(), but that won't do anything in
4871                         * this case.)
4872                         */
4873                        if (mOnClickListener == null) {
4874                            View v = focusSearch(FOCUS_DOWN);
4875
4876                            if (v != null) {
4877                                if (!v.requestFocus(FOCUS_DOWN)) {
4878                                    throw new IllegalStateException(
4879                                            "focus search returned a view " +
4880                                            "that wasn't able to take focus!");
4881                                }
4882
4883                                /*
4884                                 * Return true because we handled the key; super
4885                                 * will return false because there was no click
4886                                 * listener.
4887                                 */
4888                                super.onKeyUp(keyCode, event);
4889                                return true;
4890                            } else if ((event.getFlags()
4891                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4892                                // No target for next focus, but make sure the IME
4893                                // if this came from it.
4894                                InputMethodManager imm = InputMethodManager.peekInstance();
4895                                if (imm != null && imm.isActive(this)) {
4896                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4897                                }
4898                            }
4899                        }
4900                    }
4901                    return super.onKeyUp(keyCode, event);
4902                }
4903                break;
4904        }
4905
4906        if (mInput != null)
4907            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4908                return true;
4909
4910        if (mMovement != null && mLayout != null)
4911            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4912                return true;
4913
4914        return super.onKeyUp(keyCode, event);
4915    }
4916
4917    @Override public boolean onCheckIsTextEditor() {
4918        return mInputType != EditorInfo.TYPE_NULL;
4919    }
4920
4921    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4922        if (onCheckIsTextEditor() && isEnabled()) {
4923            if (mInputMethodState == null) {
4924                mInputMethodState = new InputMethodState();
4925            }
4926            outAttrs.inputType = mInputType;
4927            if (mInputContentType != null) {
4928                outAttrs.imeOptions = mInputContentType.imeOptions;
4929                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4930                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4931                outAttrs.actionId = mInputContentType.imeActionId;
4932                outAttrs.extras = mInputContentType.extras;
4933            } else {
4934                outAttrs.imeOptions = EditorInfo.IME_NULL;
4935            }
4936            if (focusSearch(FOCUS_DOWN) != null) {
4937                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
4938            }
4939            if (focusSearch(FOCUS_UP) != null) {
4940                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
4941            }
4942            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4943                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4944                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
4945                    // An action has not been set, but the enter key will move to
4946                    // the next focus, so set the action to that.
4947                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4948                } else {
4949                    // An action has not been set, and there is no focus to move
4950                    // to, so let's just supply a "done" action.
4951                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4952                }
4953                if (!shouldAdvanceFocusOnEnter()) {
4954                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4955                }
4956            }
4957            if (isMultilineInputType(outAttrs.inputType)) {
4958                // Multi-line text editors should always show an enter key.
4959                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4960            }
4961            outAttrs.hintText = mHint;
4962            if (mText instanceof Editable) {
4963                InputConnection ic = new EditableInputConnection(this);
4964                outAttrs.initialSelStart = getSelectionStart();
4965                outAttrs.initialSelEnd = getSelectionEnd();
4966                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4967                return ic;
4968            }
4969        }
4970        return null;
4971    }
4972
4973    /**
4974     * If this TextView contains editable content, extract a portion of it
4975     * based on the information in <var>request</var> in to <var>outText</var>.
4976     * @return Returns true if the text was successfully extracted, else false.
4977     */
4978    public boolean extractText(ExtractedTextRequest request,
4979            ExtractedText outText) {
4980        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4981                EXTRACT_UNKNOWN, outText);
4982    }
4983
4984    static final int EXTRACT_NOTHING = -2;
4985    static final int EXTRACT_UNKNOWN = -1;
4986
4987    boolean extractTextInternal(ExtractedTextRequest request,
4988            int partialStartOffset, int partialEndOffset, int delta,
4989            ExtractedText outText) {
4990        final CharSequence content = mText;
4991        if (content != null) {
4992            if (partialStartOffset != EXTRACT_NOTHING) {
4993                final int N = content.length();
4994                if (partialStartOffset < 0) {
4995                    outText.partialStartOffset = outText.partialEndOffset = -1;
4996                    partialStartOffset = 0;
4997                    partialEndOffset = N;
4998                } else {
4999                    // Now use the delta to determine the actual amount of text
5000                    // we need.
5001                    partialEndOffset += delta;
5002                    // Adjust offsets to ensure we contain full spans.
5003                    if (content instanceof Spanned) {
5004                        Spanned spanned = (Spanned)content;
5005                        Object[] spans = spanned.getSpans(partialStartOffset,
5006                                partialEndOffset, ParcelableSpan.class);
5007                        int i = spans.length;
5008                        while (i > 0) {
5009                            i--;
5010                            int j = spanned.getSpanStart(spans[i]);
5011                            if (j < partialStartOffset) partialStartOffset = j;
5012                            j = spanned.getSpanEnd(spans[i]);
5013                            if (j > partialEndOffset) partialEndOffset = j;
5014                        }
5015                    }
5016                    outText.partialStartOffset = partialStartOffset;
5017                    outText.partialEndOffset = partialEndOffset - delta;
5018
5019                    if (partialStartOffset > N) {
5020                        partialStartOffset = N;
5021                    } else if (partialStartOffset < 0) {
5022                        partialStartOffset = 0;
5023                    }
5024                    if (partialEndOffset > N) {
5025                        partialEndOffset = N;
5026                    } else if (partialEndOffset < 0) {
5027                        partialEndOffset = 0;
5028                    }
5029                }
5030                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5031                    outText.text = content.subSequence(partialStartOffset,
5032                            partialEndOffset);
5033                } else {
5034                    outText.text = TextUtils.substring(content, partialStartOffset,
5035                            partialEndOffset);
5036                }
5037            } else {
5038                outText.partialStartOffset = 0;
5039                outText.partialEndOffset = 0;
5040                outText.text = "";
5041            }
5042            outText.flags = 0;
5043            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5044                outText.flags |= ExtractedText.FLAG_SELECTING;
5045            }
5046            if (mSingleLine) {
5047                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5048            }
5049            outText.startOffset = 0;
5050            outText.selectionStart = getSelectionStart();
5051            outText.selectionEnd = getSelectionEnd();
5052            return true;
5053        }
5054        return false;
5055    }
5056
5057    boolean reportExtractedText() {
5058        final InputMethodState ims = mInputMethodState;
5059        if (ims != null) {
5060            final boolean contentChanged = ims.mContentChanged;
5061            if (contentChanged || ims.mSelectionModeChanged) {
5062                ims.mContentChanged = false;
5063                ims.mSelectionModeChanged = false;
5064                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5065                if (req != null) {
5066                    InputMethodManager imm = InputMethodManager.peekInstance();
5067                    if (imm != null) {
5068                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5069                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5070                                + " delta=" + ims.mChangedDelta);
5071                        if (ims.mChangedStart < 0 && !contentChanged) {
5072                            ims.mChangedStart = EXTRACT_NOTHING;
5073                        }
5074                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5075                                ims.mChangedDelta, ims.mTmpExtracted)) {
5076                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5077                                    + ims.mTmpExtracted.partialStartOffset
5078                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5079                                    + ": " + ims.mTmpExtracted.text);
5080                            imm.updateExtractedText(this, req.token,
5081                                    mInputMethodState.mTmpExtracted);
5082                            ims.mChangedStart = EXTRACT_UNKNOWN;
5083                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5084                            ims.mChangedDelta = 0;
5085                            ims.mContentChanged = false;
5086                            return true;
5087                        }
5088                    }
5089                }
5090            }
5091        }
5092        return false;
5093    }
5094
5095    /**
5096     * This is used to remove all style-impacting spans from text before new
5097     * extracted text is being replaced into it, so that we don't have any
5098     * lingering spans applied during the replace.
5099     */
5100    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5101        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5102        int i = spans.length;
5103        while (i > 0) {
5104            i--;
5105            spannable.removeSpan(spans[i]);
5106        }
5107    }
5108
5109    /**
5110     * Apply to this text view the given extracted text, as previously
5111     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5112     */
5113    public void setExtractedText(ExtractedText text) {
5114        Editable content = getEditableText();
5115        if (text.text != null) {
5116            if (content == null) {
5117                setText(text.text, TextView.BufferType.EDITABLE);
5118            } else if (text.partialStartOffset < 0) {
5119                removeParcelableSpans(content, 0, content.length());
5120                content.replace(0, content.length(), text.text);
5121            } else {
5122                final int N = content.length();
5123                int start = text.partialStartOffset;
5124                if (start > N) start = N;
5125                int end = text.partialEndOffset;
5126                if (end > N) end = N;
5127                removeParcelableSpans(content, start, end);
5128                content.replace(start, end, text.text);
5129            }
5130        }
5131
5132        // Now set the selection position...  make sure it is in range, to
5133        // avoid crashes.  If this is a partial update, it is possible that
5134        // the underlying text may have changed, causing us problems here.
5135        // Also we just don't want to trust clients to do the right thing.
5136        Spannable sp = (Spannable)getText();
5137        final int N = sp.length();
5138        int start = text.selectionStart;
5139        if (start < 0) start = 0;
5140        else if (start > N) start = N;
5141        int end = text.selectionEnd;
5142        if (end < 0) end = 0;
5143        else if (end > N) end = N;
5144        Selection.setSelection(sp, start, end);
5145
5146        // Finally, update the selection mode.
5147        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5148            MetaKeyKeyListener.startSelecting(this, sp);
5149        } else {
5150            MetaKeyKeyListener.stopSelecting(this, sp);
5151        }
5152    }
5153
5154    /**
5155     * @hide
5156     */
5157    public void setExtracting(ExtractedTextRequest req) {
5158        if (mInputMethodState != null) {
5159            mInputMethodState.mExtracting = req;
5160        }
5161        // This stops a possible text selection mode. Maybe not intended.
5162        hideControllers();
5163    }
5164
5165    /**
5166     * Called by the framework in response to a text completion from
5167     * the current input method, provided by it calling
5168     * {@link InputConnection#commitCompletion
5169     * InputConnection.commitCompletion()}.  The default implementation does
5170     * nothing; text views that are supporting auto-completion should override
5171     * this to do their desired behavior.
5172     *
5173     * @param text The auto complete text the user has selected.
5174     */
5175    public void onCommitCompletion(CompletionInfo text) {
5176    }
5177
5178    /**
5179     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5180     * a dictionnary) from the current input method, provided by it calling
5181     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5182     * implementation flashes the background of the corrected word to provide feedback to the user.
5183     *
5184     * @param info The auto correct info about the text that was corrected.
5185     */
5186    public void onCommitCorrection(CorrectionInfo info) {
5187        if (mCorrectionHighlighter == null) {
5188            mCorrectionHighlighter = new CorrectionHighlighter();
5189        } else {
5190            mCorrectionHighlighter.invalidate(false);
5191        }
5192
5193        mCorrectionHighlighter.highlight(info);
5194    }
5195
5196    private class CorrectionHighlighter {
5197        private final Path mPath = new Path();
5198        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5199        private int mStart, mEnd;
5200        private long mFadingStartTime;
5201        private final static int FADE_OUT_DURATION = 400;
5202
5203        public CorrectionHighlighter() {
5204            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5205            mPaint.setStyle(Paint.Style.FILL);
5206        }
5207
5208        public void highlight(CorrectionInfo info) {
5209            mStart = info.getOffset();
5210            mEnd = mStart + info.getNewText().length();
5211            mFadingStartTime = SystemClock.uptimeMillis();
5212
5213            if (mStart < 0 || mEnd < 0) {
5214                stopAnimation();
5215            }
5216        }
5217
5218        public void draw(Canvas canvas, int cursorOffsetVertical) {
5219            if (updatePath() && updatePaint()) {
5220                if (cursorOffsetVertical != 0) {
5221                    canvas.translate(0, cursorOffsetVertical);
5222                }
5223
5224                canvas.drawPath(mPath, mPaint);
5225
5226                if (cursorOffsetVertical != 0) {
5227                    canvas.translate(0, -cursorOffsetVertical);
5228                }
5229                invalidate(true);
5230            } else {
5231                stopAnimation();
5232                invalidate(false);
5233            }
5234        }
5235
5236        private boolean updatePaint() {
5237            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5238            if (duration > FADE_OUT_DURATION) return false;
5239
5240            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5241            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5242            final int color = (mHighlightColor & 0x00FFFFFF) +
5243                    ((int) (highlightColorAlpha * coef) << 24);
5244            mPaint.setColor(color);
5245            return true;
5246        }
5247
5248        private boolean updatePath() {
5249            final Layout layout = TextView.this.mLayout;
5250            if (layout == null) return false;
5251
5252            // Update in case text is edited while the animation is run
5253            final int length = mText.length();
5254            int start = Math.min(length, mStart);
5255            int end = Math.min(length, mEnd);
5256
5257            mPath.reset();
5258            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5259            return true;
5260        }
5261
5262        private void invalidate(boolean delayed) {
5263            if (TextView.this.mLayout == null) return;
5264
5265            synchronized (sTempRect) {
5266                mPath.computeBounds(sTempRect, false);
5267
5268                int left = getCompoundPaddingLeft();
5269                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5270
5271                if (delayed) {
5272                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5273                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5274                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5275                } else {
5276                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5277                            (int) sTempRect.right, (int) sTempRect.bottom);
5278                }
5279            }
5280        }
5281
5282        private void stopAnimation() {
5283            TextView.this.mCorrectionHighlighter = null;
5284        }
5285    }
5286
5287    public void beginBatchEdit() {
5288        mInBatchEditControllers = true;
5289        final InputMethodState ims = mInputMethodState;
5290        if (ims != null) {
5291            int nesting = ++ims.mBatchEditNesting;
5292            if (nesting == 1) {
5293                ims.mCursorChanged = false;
5294                ims.mChangedDelta = 0;
5295                if (ims.mContentChanged) {
5296                    // We already have a pending change from somewhere else,
5297                    // so turn this into a full update.
5298                    ims.mChangedStart = 0;
5299                    ims.mChangedEnd = mText.length();
5300                } else {
5301                    ims.mChangedStart = EXTRACT_UNKNOWN;
5302                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5303                    ims.mContentChanged = false;
5304                }
5305                onBeginBatchEdit();
5306            }
5307        }
5308    }
5309
5310    public void endBatchEdit() {
5311        mInBatchEditControllers = false;
5312        final InputMethodState ims = mInputMethodState;
5313        if (ims != null) {
5314            int nesting = --ims.mBatchEditNesting;
5315            if (nesting == 0) {
5316                finishBatchEdit(ims);
5317            }
5318        }
5319    }
5320
5321    void ensureEndedBatchEdit() {
5322        final InputMethodState ims = mInputMethodState;
5323        if (ims != null && ims.mBatchEditNesting != 0) {
5324            ims.mBatchEditNesting = 0;
5325            finishBatchEdit(ims);
5326        }
5327    }
5328
5329    void finishBatchEdit(final InputMethodState ims) {
5330        onEndBatchEdit();
5331
5332        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5333            updateAfterEdit();
5334            reportExtractedText();
5335        } else if (ims.mCursorChanged) {
5336            // Cheezy way to get us to report the current cursor location.
5337            invalidateCursor();
5338        }
5339    }
5340
5341    void updateAfterEdit() {
5342        invalidate();
5343        int curs = getSelectionStart();
5344
5345        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
5346                             Gravity.BOTTOM) {
5347            registerForPreDraw();
5348        }
5349
5350        if (curs >= 0) {
5351            mHighlightPathBogus = true;
5352
5353            if (isFocused()) {
5354                mShowCursor = SystemClock.uptimeMillis();
5355                makeBlink();
5356            }
5357        }
5358
5359        checkForResize();
5360    }
5361
5362    /**
5363     * Called by the framework in response to a request to begin a batch
5364     * of edit operations through a call to link {@link #beginBatchEdit()}.
5365     */
5366    public void onBeginBatchEdit() {
5367    }
5368
5369    /**
5370     * Called by the framework in response to a request to end a batch
5371     * of edit operations through a call to link {@link #endBatchEdit}.
5372     */
5373    public void onEndBatchEdit() {
5374    }
5375
5376    /**
5377     * Called by the framework in response to a private command from the
5378     * current method, provided by it calling
5379     * {@link InputConnection#performPrivateCommand
5380     * InputConnection.performPrivateCommand()}.
5381     *
5382     * @param action The action name of the command.
5383     * @param data Any additional data for the command.  This may be null.
5384     * @return Return true if you handled the command, else false.
5385     */
5386    public boolean onPrivateIMECommand(String action, Bundle data) {
5387        return false;
5388    }
5389
5390    private void nullLayouts() {
5391        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5392            mSavedLayout = (BoringLayout) mLayout;
5393        }
5394        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5395            mSavedHintLayout = (BoringLayout) mHintLayout;
5396        }
5397
5398        mLayout = mHintLayout = null;
5399
5400        // Since it depends on the value of mLayout
5401        prepareCursorControllers();
5402    }
5403
5404    /**
5405     * Make a new Layout based on the already-measured size of the view,
5406     * on the assumption that it was measured correctly at some point.
5407     */
5408    private void assumeLayout() {
5409        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5410
5411        if (width < 1) {
5412            width = 0;
5413        }
5414
5415        int physicalWidth = width;
5416
5417        if (mHorizontallyScrolling) {
5418            width = VERY_WIDE;
5419        }
5420
5421        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5422                      physicalWidth, false);
5423    }
5424
5425    /**
5426     * The width passed in is now the desired layout width,
5427     * not the full view width with padding.
5428     * {@hide}
5429     */
5430    protected void makeNewLayout(int w, int hintWidth,
5431                                 BoringLayout.Metrics boring,
5432                                 BoringLayout.Metrics hintBoring,
5433                                 int ellipsisWidth, boolean bringIntoView) {
5434        stopMarquee();
5435
5436        mHighlightPathBogus = true;
5437
5438        if (w < 0) {
5439            w = 0;
5440        }
5441        if (hintWidth < 0) {
5442            hintWidth = 0;
5443        }
5444
5445        Layout.Alignment alignment;
5446        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
5447            case Gravity.CENTER_HORIZONTAL:
5448                alignment = Layout.Alignment.ALIGN_CENTER;
5449                break;
5450
5451            case Gravity.RIGHT:
5452                // Note, Layout resolves ALIGN_OPPOSITE to left or
5453                // right based on the paragraph direction.
5454                alignment = Layout.Alignment.ALIGN_OPPOSITE;
5455                break;
5456
5457            default:
5458                alignment = Layout.Alignment.ALIGN_NORMAL;
5459        }
5460
5461        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5462
5463        if (mText instanceof Spannable) {
5464            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5465                    alignment, mSpacingMult,
5466                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5467                    ellipsisWidth);
5468        } else {
5469            if (boring == UNKNOWN_BORING) {
5470                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
5471                                               mBoring);
5472                if (boring != null) {
5473                    mBoring = boring;
5474                }
5475            }
5476
5477            if (boring != null) {
5478                if (boring.width <= w &&
5479                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
5480                    if (mSavedLayout != null) {
5481                        mLayout = mSavedLayout.
5482                                replaceOrMake(mTransformed, mTextPaint,
5483                                w, alignment, mSpacingMult, mSpacingAdd,
5484                                boring, mIncludePad);
5485                    } else {
5486                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5487                                w, alignment, mSpacingMult, mSpacingAdd,
5488                                boring, mIncludePad);
5489                    }
5490
5491                    mSavedLayout = (BoringLayout) mLayout;
5492                } else if (shouldEllipsize && boring.width <= w) {
5493                    if (mSavedLayout != null) {
5494                        mLayout = mSavedLayout.
5495                                replaceOrMake(mTransformed, mTextPaint,
5496                                w, alignment, mSpacingMult, mSpacingAdd,
5497                                boring, mIncludePad, mEllipsize,
5498                                ellipsisWidth);
5499                    } else {
5500                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5501                                w, alignment, mSpacingMult, mSpacingAdd,
5502                                boring, mIncludePad, mEllipsize,
5503                                ellipsisWidth);
5504                    }
5505                } else if (shouldEllipsize) {
5506                    mLayout = new StaticLayout(mTransformed,
5507                                0, mTransformed.length(),
5508                                mTextPaint, w, alignment, mSpacingMult,
5509                                mSpacingAdd, mIncludePad, mEllipsize,
5510                                ellipsisWidth);
5511                } else {
5512                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5513                            w, alignment, mSpacingMult, mSpacingAdd,
5514                            mIncludePad);
5515                }
5516            } else if (shouldEllipsize) {
5517                mLayout = new StaticLayout(mTransformed,
5518                            0, mTransformed.length(),
5519                            mTextPaint, w, alignment, mSpacingMult,
5520                            mSpacingAdd, mIncludePad, mEllipsize,
5521                            ellipsisWidth);
5522            } else {
5523                mLayout = new StaticLayout(mTransformed, mTextPaint,
5524                        w, alignment, mSpacingMult, mSpacingAdd,
5525                        mIncludePad);
5526            }
5527        }
5528
5529        shouldEllipsize = mEllipsize != null;
5530        mHintLayout = null;
5531
5532        if (mHint != null) {
5533            if (shouldEllipsize) hintWidth = w;
5534
5535            if (hintBoring == UNKNOWN_BORING) {
5536                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5537                                                   mHintBoring);
5538                if (hintBoring != null) {
5539                    mHintBoring = hintBoring;
5540                }
5541            }
5542
5543            if (hintBoring != null) {
5544                if (hintBoring.width <= hintWidth &&
5545                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5546                    if (mSavedHintLayout != null) {
5547                        mHintLayout = mSavedHintLayout.
5548                                replaceOrMake(mHint, mTextPaint,
5549                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5550                                hintBoring, mIncludePad);
5551                    } else {
5552                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5553                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5554                                hintBoring, mIncludePad);
5555                    }
5556
5557                    mSavedHintLayout = (BoringLayout) mHintLayout;
5558                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5559                    if (mSavedHintLayout != null) {
5560                        mHintLayout = mSavedHintLayout.
5561                                replaceOrMake(mHint, mTextPaint,
5562                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5563                                hintBoring, mIncludePad, mEllipsize,
5564                                ellipsisWidth);
5565                    } else {
5566                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5567                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5568                                hintBoring, mIncludePad, mEllipsize,
5569                                ellipsisWidth);
5570                    }
5571                } else if (shouldEllipsize) {
5572                    mHintLayout = new StaticLayout(mHint,
5573                                0, mHint.length(),
5574                                mTextPaint, hintWidth, alignment, mSpacingMult,
5575                                mSpacingAdd, mIncludePad, mEllipsize,
5576                                ellipsisWidth);
5577                } else {
5578                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5579                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5580                            mIncludePad);
5581                }
5582            } else if (shouldEllipsize) {
5583                mHintLayout = new StaticLayout(mHint,
5584                            0, mHint.length(),
5585                            mTextPaint, hintWidth, alignment, mSpacingMult,
5586                            mSpacingAdd, mIncludePad, mEllipsize,
5587                            ellipsisWidth);
5588            } else {
5589                mHintLayout = new StaticLayout(mHint, mTextPaint,
5590                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5591                        mIncludePad);
5592            }
5593        }
5594
5595        if (bringIntoView) {
5596            registerForPreDraw();
5597        }
5598
5599        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5600            if (!compressText(ellipsisWidth)) {
5601                final int height = mLayoutParams.height;
5602                // If the size of the view does not depend on the size of the text, try to
5603                // start the marquee immediately
5604                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5605                    startMarquee();
5606                } else {
5607                    // Defer the start of the marquee until we know our width (see setFrame())
5608                    mRestartMarquee = true;
5609                }
5610            }
5611        }
5612
5613        // CursorControllers need a non-null mLayout
5614        prepareCursorControllers();
5615    }
5616
5617    private boolean compressText(float width) {
5618        if (isHardwareAccelerated()) return false;
5619
5620        // Only compress the text if it hasn't been compressed by the previous pass
5621        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5622                mTextPaint.getTextScaleX() == 1.0f) {
5623            final float textWidth = mLayout.getLineWidth(0);
5624            final float overflow = (textWidth + 1.0f - width) / width;
5625            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5626                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5627                post(new Runnable() {
5628                    public void run() {
5629                        requestLayout();
5630                    }
5631                });
5632                return true;
5633            }
5634        }
5635
5636        return false;
5637    }
5638
5639    private static int desired(Layout layout) {
5640        int n = layout.getLineCount();
5641        CharSequence text = layout.getText();
5642        float max = 0;
5643
5644        // if any line was wrapped, we can't use it.
5645        // but it's ok for the last line not to have a newline
5646
5647        for (int i = 0; i < n - 1; i++) {
5648            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5649                return -1;
5650        }
5651
5652        for (int i = 0; i < n; i++) {
5653            max = Math.max(max, layout.getLineWidth(i));
5654        }
5655
5656        return (int) FloatMath.ceil(max);
5657    }
5658
5659    /**
5660     * Set whether the TextView includes extra top and bottom padding to make
5661     * room for accents that go above the normal ascent and descent.
5662     * The default is true.
5663     *
5664     * @attr ref android.R.styleable#TextView_includeFontPadding
5665     */
5666    public void setIncludeFontPadding(boolean includepad) {
5667        mIncludePad = includepad;
5668
5669        if (mLayout != null) {
5670            nullLayouts();
5671            requestLayout();
5672            invalidate();
5673        }
5674    }
5675
5676    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5677
5678    @Override
5679    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5680        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5681        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5682        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5683        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5684
5685        int width;
5686        int height;
5687
5688        BoringLayout.Metrics boring = UNKNOWN_BORING;
5689        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5690
5691        int des = -1;
5692        boolean fromexisting = false;
5693
5694        if (widthMode == MeasureSpec.EXACTLY) {
5695            // Parent has told us how big to be. So be it.
5696            width = widthSize;
5697        } else {
5698            if (mLayout != null && mEllipsize == null) {
5699                des = desired(mLayout);
5700            }
5701
5702            if (des < 0) {
5703                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5704                if (boring != null) {
5705                    mBoring = boring;
5706                }
5707            } else {
5708                fromexisting = true;
5709            }
5710
5711            if (boring == null || boring == UNKNOWN_BORING) {
5712                if (des < 0) {
5713                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5714                }
5715
5716                width = des;
5717            } else {
5718                width = boring.width;
5719            }
5720
5721            final Drawables dr = mDrawables;
5722            if (dr != null) {
5723                width = Math.max(width, dr.mDrawableWidthTop);
5724                width = Math.max(width, dr.mDrawableWidthBottom);
5725            }
5726
5727            if (mHint != null) {
5728                int hintDes = -1;
5729                int hintWidth;
5730
5731                if (mHintLayout != null && mEllipsize == null) {
5732                    hintDes = desired(mHintLayout);
5733                }
5734
5735                if (hintDes < 0) {
5736                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5737                    if (hintBoring != null) {
5738                        mHintBoring = hintBoring;
5739                    }
5740                }
5741
5742                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5743                    if (hintDes < 0) {
5744                        hintDes = (int) FloatMath.ceil(
5745                                Layout.getDesiredWidth(mHint, mTextPaint));
5746                    }
5747
5748                    hintWidth = hintDes;
5749                } else {
5750                    hintWidth = hintBoring.width;
5751                }
5752
5753                if (hintWidth > width) {
5754                    width = hintWidth;
5755                }
5756            }
5757
5758            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5759
5760            if (mMaxWidthMode == EMS) {
5761                width = Math.min(width, mMaxWidth * getLineHeight());
5762            } else {
5763                width = Math.min(width, mMaxWidth);
5764            }
5765
5766            if (mMinWidthMode == EMS) {
5767                width = Math.max(width, mMinWidth * getLineHeight());
5768            } else {
5769                width = Math.max(width, mMinWidth);
5770            }
5771
5772            // Check against our minimum width
5773            width = Math.max(width, getSuggestedMinimumWidth());
5774
5775            if (widthMode == MeasureSpec.AT_MOST) {
5776                width = Math.min(widthSize, width);
5777            }
5778        }
5779
5780        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5781        int unpaddedWidth = want;
5782
5783        if (mHorizontallyScrolling) want = VERY_WIDE;
5784
5785        int hintWant = want;
5786        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5787
5788        if (mLayout == null) {
5789            makeNewLayout(want, hintWant, boring, hintBoring,
5790                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5791        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5792                   (mLayout.getEllipsizedWidth() !=
5793                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5794            if (mHint == null && mEllipsize == null &&
5795                    want > mLayout.getWidth() &&
5796                    (mLayout instanceof BoringLayout ||
5797                            (fromexisting && des >= 0 && des <= want))) {
5798                mLayout.increaseWidthTo(want);
5799            } else {
5800                makeNewLayout(want, hintWant, boring, hintBoring,
5801                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5802            }
5803        } else {
5804            // Width has not changed.
5805        }
5806
5807        if (heightMode == MeasureSpec.EXACTLY) {
5808            // Parent has told us how big to be. So be it.
5809            height = heightSize;
5810            mDesiredHeightAtMeasure = -1;
5811        } else {
5812            int desired = getDesiredHeight();
5813
5814            height = desired;
5815            mDesiredHeightAtMeasure = desired;
5816
5817            if (heightMode == MeasureSpec.AT_MOST) {
5818                height = Math.min(desired, heightSize);
5819            }
5820        }
5821
5822        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5823        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5824            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5825        }
5826
5827        /*
5828         * We didn't let makeNewLayout() register to bring the cursor into view,
5829         * so do it here if there is any possibility that it is needed.
5830         */
5831        if (mMovement != null ||
5832            mLayout.getWidth() > unpaddedWidth ||
5833            mLayout.getHeight() > unpaddedHeight) {
5834            registerForPreDraw();
5835        } else {
5836            scrollTo(0, 0);
5837        }
5838
5839        setMeasuredDimension(width, height);
5840    }
5841
5842    private int getDesiredHeight() {
5843        return Math.max(
5844                getDesiredHeight(mLayout, true),
5845                getDesiredHeight(mHintLayout, mEllipsize != null));
5846    }
5847
5848    private int getDesiredHeight(Layout layout, boolean cap) {
5849        if (layout == null) {
5850            return 0;
5851        }
5852
5853        int linecount = layout.getLineCount();
5854        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5855        int desired = layout.getLineTop(linecount);
5856
5857        final Drawables dr = mDrawables;
5858        if (dr != null) {
5859            desired = Math.max(desired, dr.mDrawableHeightLeft);
5860            desired = Math.max(desired, dr.mDrawableHeightRight);
5861        }
5862
5863        desired += pad;
5864
5865        if (mMaxMode == LINES) {
5866            /*
5867             * Don't cap the hint to a certain number of lines.
5868             * (Do cap it, though, if we have a maximum pixel height.)
5869             */
5870            if (cap) {
5871                if (linecount > mMaximum) {
5872                    desired = layout.getLineTop(mMaximum) +
5873                              layout.getBottomPadding();
5874
5875                    if (dr != null) {
5876                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5877                        desired = Math.max(desired, dr.mDrawableHeightRight);
5878                    }
5879
5880                    desired += pad;
5881                    linecount = mMaximum;
5882                }
5883            }
5884        } else {
5885            desired = Math.min(desired, mMaximum);
5886        }
5887
5888        if (mMinMode == LINES) {
5889            if (linecount < mMinimum) {
5890                desired += getLineHeight() * (mMinimum - linecount);
5891            }
5892        } else {
5893            desired = Math.max(desired, mMinimum);
5894        }
5895
5896        // Check against our minimum height
5897        desired = Math.max(desired, getSuggestedMinimumHeight());
5898
5899        return desired;
5900    }
5901
5902    /**
5903     * Check whether a change to the existing text layout requires a
5904     * new view layout.
5905     */
5906    private void checkForResize() {
5907        boolean sizeChanged = false;
5908
5909        if (mLayout != null) {
5910            // Check if our width changed
5911            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5912                sizeChanged = true;
5913                invalidate();
5914            }
5915
5916            // Check if our height changed
5917            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5918                int desiredHeight = getDesiredHeight();
5919
5920                if (desiredHeight != this.getHeight()) {
5921                    sizeChanged = true;
5922                }
5923            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5924                if (mDesiredHeightAtMeasure >= 0) {
5925                    int desiredHeight = getDesiredHeight();
5926
5927                    if (desiredHeight != mDesiredHeightAtMeasure) {
5928                        sizeChanged = true;
5929                    }
5930                }
5931            }
5932        }
5933
5934        if (sizeChanged) {
5935            requestLayout();
5936            // caller will have already invalidated
5937        }
5938    }
5939
5940    /**
5941     * Check whether entirely new text requires a new view layout
5942     * or merely a new text layout.
5943     */
5944    private void checkForRelayout() {
5945        // If we have a fixed width, we can just swap in a new text layout
5946        // if the text height stays the same or if the view height is fixed.
5947
5948        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5949                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5950                (mHint == null || mHintLayout != null) &&
5951                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5952            // Static width, so try making a new text layout.
5953
5954            int oldht = mLayout.getHeight();
5955            int want = mLayout.getWidth();
5956            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5957
5958            /*
5959             * No need to bring the text into view, since the size is not
5960             * changing (unless we do the requestLayout(), in which case it
5961             * will happen at measure).
5962             */
5963            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5964                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5965                          false);
5966
5967            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5968                // In a fixed-height view, so use our new text layout.
5969                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5970                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5971                    invalidate();
5972                    return;
5973                }
5974
5975                // Dynamic height, but height has stayed the same,
5976                // so use our new text layout.
5977                if (mLayout.getHeight() == oldht &&
5978                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5979                    invalidate();
5980                    return;
5981                }
5982            }
5983
5984            // We lose: the height has changed and we have a dynamic height.
5985            // Request a new view layout using our new text layout.
5986            requestLayout();
5987            invalidate();
5988        } else {
5989            // Dynamic width, so we have no choice but to request a new
5990            // view layout with a new text layout.
5991
5992            nullLayouts();
5993            requestLayout();
5994            invalidate();
5995        }
5996    }
5997
5998    /**
5999     * Returns true if anything changed.
6000     */
6001    private boolean bringTextIntoView() {
6002        int line = 0;
6003        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6004            line = mLayout.getLineCount() - 1;
6005        }
6006
6007        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6008        int dir = mLayout.getParagraphDirection(line);
6009        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6010        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6011        int ht = mLayout.getHeight();
6012
6013        int scrollx, scrolly;
6014
6015        if (a == Layout.Alignment.ALIGN_CENTER) {
6016            /*
6017             * Keep centered if possible, or, if it is too wide to fit,
6018             * keep leading edge in view.
6019             */
6020
6021            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6022            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6023
6024            if (right - left < hspace) {
6025                scrollx = (right + left) / 2 - hspace / 2;
6026            } else {
6027                if (dir < 0) {
6028                    scrollx = right - hspace;
6029                } else {
6030                    scrollx = left;
6031                }
6032            }
6033        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
6034            /*
6035             * Keep leading edge in view.
6036             */
6037
6038            if (dir < 0) {
6039                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6040                scrollx = right - hspace;
6041            } else {
6042                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6043            }
6044        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
6045            /*
6046             * Keep trailing edge in view.
6047             */
6048
6049            if (dir < 0) {
6050                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6051            } else {
6052                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6053                scrollx = right - hspace;
6054            }
6055        }
6056
6057        if (ht < vspace) {
6058            scrolly = 0;
6059        } else {
6060            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6061                scrolly = ht - vspace;
6062            } else {
6063                scrolly = 0;
6064            }
6065        }
6066
6067        if (scrollx != mScrollX || scrolly != mScrollY) {
6068            scrollTo(scrollx, scrolly);
6069            return true;
6070        } else {
6071            return false;
6072        }
6073    }
6074
6075    /**
6076     * Move the point, specified by the offset, into the view if it is needed.
6077     * This has to be called after layout. Returns true if anything changed.
6078     */
6079    public boolean bringPointIntoView(int offset) {
6080        boolean changed = false;
6081
6082        int line = mLayout.getLineForOffset(offset);
6083
6084        // FIXME: Is it okay to truncate this, or should we round?
6085        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6086        final int top = mLayout.getLineTop(line);
6087        final int bottom = mLayout.getLineTop(line + 1);
6088
6089        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6090        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6091        int ht = mLayout.getHeight();
6092
6093        int grav;
6094
6095        switch (mLayout.getParagraphAlignment(line)) {
6096            case ALIGN_NORMAL:
6097                grav = 1;
6098                break;
6099
6100            case ALIGN_OPPOSITE:
6101                grav = -1;
6102                break;
6103
6104            default:
6105                grav = 0;
6106        }
6107
6108        grav *= mLayout.getParagraphDirection(line);
6109
6110        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6111        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6112
6113        int hslack = (bottom - top) / 2;
6114        int vslack = hslack;
6115
6116        if (vslack > vspace / 4)
6117            vslack = vspace / 4;
6118        if (hslack > hspace / 4)
6119            hslack = hspace / 4;
6120
6121        int hs = mScrollX;
6122        int vs = mScrollY;
6123
6124        if (top - vs < vslack)
6125            vs = top - vslack;
6126        if (bottom - vs > vspace - vslack)
6127            vs = bottom - (vspace - vslack);
6128        if (ht - vs < vspace)
6129            vs = ht - vspace;
6130        if (0 - vs > 0)
6131            vs = 0;
6132
6133        if (grav != 0) {
6134            if (x - hs < hslack) {
6135                hs = x - hslack;
6136            }
6137            if (x - hs > hspace - hslack) {
6138                hs = x - (hspace - hslack);
6139            }
6140        }
6141
6142        if (grav < 0) {
6143            if (left - hs > 0)
6144                hs = left;
6145            if (right - hs < hspace)
6146                hs = right - hspace;
6147        } else if (grav > 0) {
6148            if (right - hs < hspace)
6149                hs = right - hspace;
6150            if (left - hs > 0)
6151                hs = left;
6152        } else /* grav == 0 */ {
6153            if (right - left <= hspace) {
6154                /*
6155                 * If the entire text fits, center it exactly.
6156                 */
6157                hs = left - (hspace - (right - left)) / 2;
6158            } else if (x > right - hslack) {
6159                /*
6160                 * If we are near the right edge, keep the right edge
6161                 * at the edge of the view.
6162                 */
6163                hs = right - hspace;
6164            } else if (x < left + hslack) {
6165                /*
6166                 * If we are near the left edge, keep the left edge
6167                 * at the edge of the view.
6168                 */
6169                hs = left;
6170            } else if (left > hs) {
6171                /*
6172                 * Is there whitespace visible at the left?  Fix it if so.
6173                 */
6174                hs = left;
6175            } else if (right < hs + hspace) {
6176                /*
6177                 * Is there whitespace visible at the right?  Fix it if so.
6178                 */
6179                hs = right - hspace;
6180            } else {
6181                /*
6182                 * Otherwise, float as needed.
6183                 */
6184                if (x - hs < hslack) {
6185                    hs = x - hslack;
6186                }
6187                if (x - hs > hspace - hslack) {
6188                    hs = x - (hspace - hslack);
6189                }
6190            }
6191        }
6192
6193        if (hs != mScrollX || vs != mScrollY) {
6194            if (mScroller == null) {
6195                scrollTo(hs, vs);
6196            } else {
6197                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6198                int dx = hs - mScrollX;
6199                int dy = vs - mScrollY;
6200
6201                if (duration > ANIMATED_SCROLL_GAP) {
6202                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6203                    awakenScrollBars(mScroller.getDuration());
6204                    invalidate();
6205                } else {
6206                    if (!mScroller.isFinished()) {
6207                        mScroller.abortAnimation();
6208                    }
6209
6210                    scrollBy(dx, dy);
6211                }
6212
6213                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6214            }
6215
6216            changed = true;
6217        }
6218
6219        if (isFocused()) {
6220            // This offsets because getInterestingRect() is in terms of
6221            // viewport coordinates, but requestRectangleOnScreen()
6222            // is in terms of content coordinates.
6223
6224            Rect r = new Rect(x, top, x + 1, bottom);
6225            getInterestingRect(r, line);
6226            r.offset(mScrollX, mScrollY);
6227
6228            if (requestRectangleOnScreen(r)) {
6229                changed = true;
6230            }
6231        }
6232
6233        return changed;
6234    }
6235
6236    /**
6237     * Move the cursor, if needed, so that it is at an offset that is visible
6238     * to the user.  This will not move the cursor if it represents more than
6239     * one character (a selection range).  This will only work if the
6240     * TextView contains spannable text; otherwise it will do nothing.
6241     *
6242     * @return True if the cursor was actually moved, false otherwise.
6243     */
6244    public boolean moveCursorToVisibleOffset() {
6245        if (!(mText instanceof Spannable)) {
6246            return false;
6247        }
6248        int start = getSelectionStart();
6249        int end = getSelectionEnd();
6250        if (start != end) {
6251            return false;
6252        }
6253
6254        // First: make sure the line is visible on screen:
6255
6256        int line = mLayout.getLineForOffset(start);
6257
6258        final int top = mLayout.getLineTop(line);
6259        final int bottom = mLayout.getLineTop(line + 1);
6260        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6261        int vslack = (bottom - top) / 2;
6262        if (vslack > vspace / 4)
6263            vslack = vspace / 4;
6264        final int vs = mScrollY;
6265
6266        if (top < (vs+vslack)) {
6267            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6268        } else if (bottom > (vspace+vs-vslack)) {
6269            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6270        }
6271
6272        // Next: make sure the character is visible on screen:
6273
6274        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6275        final int hs = mScrollX;
6276        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6277        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6278
6279        // line might contain bidirectional text
6280        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6281        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6282
6283        int newStart = start;
6284        if (newStart < lowChar) {
6285            newStart = lowChar;
6286        } else if (newStart > highChar) {
6287            newStart = highChar;
6288        }
6289
6290        if (newStart != start) {
6291            Selection.setSelection((Spannable)mText, newStart);
6292            return true;
6293        }
6294
6295        return false;
6296    }
6297
6298    @Override
6299    public void computeScroll() {
6300        if (mScroller != null) {
6301            if (mScroller.computeScrollOffset()) {
6302                mScrollX = mScroller.getCurrX();
6303                mScrollY = mScroller.getCurrY();
6304                invalidateParentCaches();
6305                postInvalidate();  // So we draw again
6306            }
6307        }
6308    }
6309
6310    private void getInterestingRect(Rect r, int line) {
6311        convertFromViewportToContentCoordinates(r);
6312
6313        // Rectangle can can be expanded on first and last line to take
6314        // padding into account.
6315        // TODO Take left/right padding into account too?
6316        if (line == 0) r.top -= getExtendedPaddingTop();
6317        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6318    }
6319
6320    private void convertFromViewportToContentCoordinates(Rect r) {
6321        final int horizontalOffset = viewportToContentHorizontalOffset();
6322        r.left += horizontalOffset;
6323        r.right += horizontalOffset;
6324
6325        final int verticalOffset = viewportToContentVerticalOffset();
6326        r.top += verticalOffset;
6327        r.bottom += verticalOffset;
6328    }
6329
6330    private int viewportToContentHorizontalOffset() {
6331        return getCompoundPaddingLeft() - mScrollX;
6332    }
6333
6334    private int viewportToContentVerticalOffset() {
6335        int offset = getExtendedPaddingTop() - mScrollY;
6336        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6337            offset += getVerticalOffset(false);
6338        }
6339        return offset;
6340    }
6341
6342    @Override
6343    public void debug(int depth) {
6344        super.debug(depth);
6345
6346        String output = debugIndent(depth);
6347        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6348                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6349                + "} ";
6350
6351        if (mText != null) {
6352
6353            output += "mText=\"" + mText + "\" ";
6354            if (mLayout != null) {
6355                output += "mLayout width=" + mLayout.getWidth()
6356                        + " height=" + mLayout.getHeight();
6357            }
6358        } else {
6359            output += "mText=NULL";
6360        }
6361        Log.d(VIEW_LOG_TAG, output);
6362    }
6363
6364    /**
6365     * Convenience for {@link Selection#getSelectionStart}.
6366     */
6367    @ViewDebug.ExportedProperty(category = "text")
6368    public int getSelectionStart() {
6369        return Selection.getSelectionStart(getText());
6370    }
6371
6372    /**
6373     * Convenience for {@link Selection#getSelectionEnd}.
6374     */
6375    @ViewDebug.ExportedProperty(category = "text")
6376    public int getSelectionEnd() {
6377        return Selection.getSelectionEnd(getText());
6378    }
6379
6380    /**
6381     * Return true iff there is a selection inside this text view.
6382     */
6383    public boolean hasSelection() {
6384        final int selectionStart = getSelectionStart();
6385        final int selectionEnd = getSelectionEnd();
6386
6387        return selectionStart >= 0 && selectionStart != selectionEnd;
6388    }
6389
6390    /**
6391     * Sets the properties of this field (lines, horizontally scrolling,
6392     * transformation method) to be for a single-line input.
6393     *
6394     * @attr ref android.R.styleable#TextView_singleLine
6395     */
6396    public void setSingleLine() {
6397        setSingleLine(true);
6398    }
6399
6400    /**
6401     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6402     * transformation method) to be for a single-line input; if false, restores these to the default
6403     * conditions.
6404     *
6405     * Note that the default conditions are not necessarily those that were in effect prior this
6406     * method, and you may want to reset these properties to your custom values.
6407     *
6408     * @attr ref android.R.styleable#TextView_singleLine
6409     */
6410    @android.view.RemotableViewMethod
6411    public void setSingleLine(boolean singleLine) {
6412        // Could be used, but may break backward compatibility.
6413        // if (mSingleLine == singleLine) return;
6414        setInputTypeSingleLine(singleLine);
6415        applySingleLine(singleLine, true, true);
6416    }
6417
6418    /**
6419     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6420     * @param singleLine
6421     */
6422    private void setInputTypeSingleLine(boolean singleLine) {
6423        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6424            if (singleLine) {
6425                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6426            } else {
6427                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6428            }
6429        }
6430    }
6431
6432    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6433            boolean changeMaxLines) {
6434        mSingleLine = singleLine;
6435        if (singleLine) {
6436            setLines(1);
6437            setHorizontallyScrolling(true);
6438            if (applyTransformation) {
6439                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6440            }
6441            // TODO setState
6442        } else {
6443            if (changeMaxLines) {
6444                setMaxLines(Integer.MAX_VALUE);
6445            }
6446            setHorizontallyScrolling(false);
6447            if (applyTransformation) {
6448                setTransformationMethod(null);
6449            }
6450            // TODO setState
6451        }
6452    }
6453
6454    /**
6455     * Causes words in the text that are longer than the view is wide
6456     * to be ellipsized instead of broken in the middle.  You may also
6457     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6458     * to constrain the text to a single line.  Use <code>null</code>
6459     * to turn off ellipsizing.
6460     *
6461     * @attr ref android.R.styleable#TextView_ellipsize
6462     */
6463    public void setEllipsize(TextUtils.TruncateAt where) {
6464        mEllipsize = where;
6465
6466        if (mLayout != null) {
6467            nullLayouts();
6468            requestLayout();
6469            invalidate();
6470        }
6471    }
6472
6473    /**
6474     * Sets how many times to repeat the marquee animation. Only applied if the
6475     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6476     *
6477     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6478     */
6479    public void setMarqueeRepeatLimit(int marqueeLimit) {
6480        mMarqueeRepeatLimit = marqueeLimit;
6481    }
6482
6483    /**
6484     * Returns where, if anywhere, words that are longer than the view
6485     * is wide should be ellipsized.
6486     */
6487    @ViewDebug.ExportedProperty
6488    public TextUtils.TruncateAt getEllipsize() {
6489        return mEllipsize;
6490    }
6491
6492    /**
6493     * Set the TextView so that when it takes focus, all the text is
6494     * selected.
6495     *
6496     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6497     */
6498    @android.view.RemotableViewMethod
6499    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6500        mSelectAllOnFocus = selectAllOnFocus;
6501
6502        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6503            setText(mText, BufferType.SPANNABLE);
6504        }
6505    }
6506
6507    /**
6508     * Set whether the cursor is visible.  The default is true.
6509     *
6510     * @attr ref android.R.styleable#TextView_cursorVisible
6511     */
6512    @android.view.RemotableViewMethod
6513    public void setCursorVisible(boolean visible) {
6514        mCursorVisible = visible;
6515        invalidate();
6516
6517        makeBlink();
6518
6519        // InsertionPointCursorController depends on mCursorVisible
6520        prepareCursorControllers();
6521    }
6522
6523    private boolean isCursorVisible() {
6524        return mCursorVisible && isTextEditable();
6525    }
6526
6527    private boolean canMarquee() {
6528        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6529        return width > 0 && mLayout.getLineWidth(0) > width;
6530    }
6531
6532    private void startMarquee() {
6533        // Do not ellipsize EditText
6534        if (mInput != null) return;
6535
6536        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6537            return;
6538        }
6539
6540        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6541                getLineCount() == 1 && canMarquee()) {
6542
6543            if (mMarquee == null) mMarquee = new Marquee(this);
6544            mMarquee.start(mMarqueeRepeatLimit);
6545        }
6546    }
6547
6548    private void stopMarquee() {
6549        if (mMarquee != null && !mMarquee.isStopped()) {
6550            mMarquee.stop();
6551        }
6552    }
6553
6554    private void startStopMarquee(boolean start) {
6555        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6556            if (start) {
6557                startMarquee();
6558            } else {
6559                stopMarquee();
6560            }
6561        }
6562    }
6563
6564    private static final class Marquee extends Handler {
6565        // TODO: Add an option to configure this
6566        private static final float MARQUEE_DELTA_MAX = 0.07f;
6567        private static final int MARQUEE_DELAY = 1200;
6568        private static final int MARQUEE_RESTART_DELAY = 1200;
6569        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6570        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6571
6572        private static final byte MARQUEE_STOPPED = 0x0;
6573        private static final byte MARQUEE_STARTING = 0x1;
6574        private static final byte MARQUEE_RUNNING = 0x2;
6575
6576        private static final int MESSAGE_START = 0x1;
6577        private static final int MESSAGE_TICK = 0x2;
6578        private static final int MESSAGE_RESTART = 0x3;
6579
6580        private final WeakReference<TextView> mView;
6581
6582        private byte mStatus = MARQUEE_STOPPED;
6583        private final float mScrollUnit;
6584        private float mMaxScroll;
6585        float mMaxFadeScroll;
6586        private float mGhostStart;
6587        private float mGhostOffset;
6588        private float mFadeStop;
6589        private int mRepeatLimit;
6590
6591        float mScroll;
6592
6593        Marquee(TextView v) {
6594            final float density = v.getContext().getResources().getDisplayMetrics().density;
6595            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6596            mView = new WeakReference<TextView>(v);
6597        }
6598
6599        @Override
6600        public void handleMessage(Message msg) {
6601            switch (msg.what) {
6602                case MESSAGE_START:
6603                    mStatus = MARQUEE_RUNNING;
6604                    tick();
6605                    break;
6606                case MESSAGE_TICK:
6607                    tick();
6608                    break;
6609                case MESSAGE_RESTART:
6610                    if (mStatus == MARQUEE_RUNNING) {
6611                        if (mRepeatLimit >= 0) {
6612                            mRepeatLimit--;
6613                        }
6614                        start(mRepeatLimit);
6615                    }
6616                    break;
6617            }
6618        }
6619
6620        void tick() {
6621            if (mStatus != MARQUEE_RUNNING) {
6622                return;
6623            }
6624
6625            removeMessages(MESSAGE_TICK);
6626
6627            final TextView textView = mView.get();
6628            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6629                mScroll += mScrollUnit;
6630                if (mScroll > mMaxScroll) {
6631                    mScroll = mMaxScroll;
6632                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6633                } else {
6634                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6635                }
6636                textView.invalidate();
6637            }
6638        }
6639
6640        void stop() {
6641            mStatus = MARQUEE_STOPPED;
6642            removeMessages(MESSAGE_START);
6643            removeMessages(MESSAGE_RESTART);
6644            removeMessages(MESSAGE_TICK);
6645            resetScroll();
6646        }
6647
6648        private void resetScroll() {
6649            mScroll = 0.0f;
6650            final TextView textView = mView.get();
6651            if (textView != null) textView.invalidate();
6652        }
6653
6654        void start(int repeatLimit) {
6655            if (repeatLimit == 0) {
6656                stop();
6657                return;
6658            }
6659            mRepeatLimit = repeatLimit;
6660            final TextView textView = mView.get();
6661            if (textView != null && textView.mLayout != null) {
6662                mStatus = MARQUEE_STARTING;
6663                mScroll = 0.0f;
6664                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6665                        textView.getCompoundPaddingRight();
6666                final float lineWidth = textView.mLayout.getLineWidth(0);
6667                final float gap = textWidth / 3.0f;
6668                mGhostStart = lineWidth - textWidth + gap;
6669                mMaxScroll = mGhostStart + textWidth;
6670                mGhostOffset = lineWidth + gap;
6671                mFadeStop = lineWidth + textWidth / 6.0f;
6672                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6673
6674                textView.invalidate();
6675                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6676            }
6677        }
6678
6679        float getGhostOffset() {
6680            return mGhostOffset;
6681        }
6682
6683        boolean shouldDrawLeftFade() {
6684            return mScroll <= mFadeStop;
6685        }
6686
6687        boolean shouldDrawGhost() {
6688            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6689        }
6690
6691        boolean isRunning() {
6692            return mStatus == MARQUEE_RUNNING;
6693        }
6694
6695        boolean isStopped() {
6696            return mStatus == MARQUEE_STOPPED;
6697        }
6698    }
6699
6700    /**
6701     * This method is called when the text is changed, in case any
6702     * subclasses would like to know.
6703     *
6704     * @param text The text the TextView is displaying.
6705     * @param start The offset of the start of the range of the text
6706     *              that was modified.
6707     * @param before The offset of the former end of the range of the
6708     *               text that was modified.  If text was simply inserted,
6709     *               this will be the same as <code>start</code>.
6710     *               If text was replaced with new text or deleted, the
6711     *               length of the old text was <code>before-start</code>.
6712     * @param after The offset of the end of the range of the text
6713     *              that was modified.  If text was simply deleted,
6714     *              this will be the same as <code>start</code>.
6715     *              If text was replaced with new text or inserted,
6716     *              the length of the new text is <code>after-start</code>.
6717     */
6718    protected void onTextChanged(CharSequence text,
6719                                 int start, int before, int after) {
6720    }
6721
6722    /**
6723     * This method is called when the selection has changed, in case any
6724     * subclasses would like to know.
6725     *
6726     * @param selStart The new selection start location.
6727     * @param selEnd The new selection end location.
6728     */
6729    protected void onSelectionChanged(int selStart, int selEnd) {
6730    }
6731
6732    /**
6733     * Adds a TextWatcher to the list of those whose methods are called
6734     * whenever this TextView's text changes.
6735     * <p>
6736     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6737     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6738     * if there are any text changed listeners forces the buffer type to
6739     * Editable if it would not otherwise be and does call this method.
6740     */
6741    public void addTextChangedListener(TextWatcher watcher) {
6742        if (mListeners == null) {
6743            mListeners = new ArrayList<TextWatcher>();
6744        }
6745
6746        mListeners.add(watcher);
6747    }
6748
6749    /**
6750     * Removes the specified TextWatcher from the list of those whose
6751     * methods are called
6752     * whenever this TextView's text changes.
6753     */
6754    public void removeTextChangedListener(TextWatcher watcher) {
6755        if (mListeners != null) {
6756            int i = mListeners.indexOf(watcher);
6757
6758            if (i >= 0) {
6759                mListeners.remove(i);
6760            }
6761        }
6762    }
6763
6764    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6765                                   int after) {
6766        if (mListeners != null) {
6767            final ArrayList<TextWatcher> list = mListeners;
6768            final int count = list.size();
6769            for (int i = 0; i < count; i++) {
6770                list.get(i).beforeTextChanged(text, start, before, after);
6771            }
6772        }
6773    }
6774
6775    /**
6776     * Not private so it can be called from an inner class without going
6777     * through a thunk.
6778     */
6779    void sendOnTextChanged(CharSequence text, int start, int before,
6780                                   int after) {
6781        if (mListeners != null) {
6782            final ArrayList<TextWatcher> list = mListeners;
6783            final int count = list.size();
6784            for (int i = 0; i < count; i++) {
6785                list.get(i).onTextChanged(text, start, before, after);
6786            }
6787        }
6788    }
6789
6790    /**
6791     * Not private so it can be called from an inner class without going
6792     * through a thunk.
6793     */
6794    void sendAfterTextChanged(Editable text) {
6795        if (mListeners != null) {
6796            final ArrayList<TextWatcher> list = mListeners;
6797            final int count = list.size();
6798            for (int i = 0; i < count; i++) {
6799                list.get(i).afterTextChanged(text);
6800            }
6801        }
6802    }
6803
6804    /**
6805     * Not private so it can be called from an inner class without going
6806     * through a thunk.
6807     */
6808    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
6809        final InputMethodState ims = mInputMethodState;
6810        if (ims == null || ims.mBatchEditNesting == 0) {
6811            updateAfterEdit();
6812        }
6813        if (ims != null) {
6814            ims.mContentChanged = true;
6815            if (ims.mChangedStart < 0) {
6816                ims.mChangedStart = start;
6817                ims.mChangedEnd = start+before;
6818            } else {
6819                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6820                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6821            }
6822            ims.mChangedDelta += after-before;
6823        }
6824
6825        sendOnTextChanged(buffer, start, before, after);
6826        onTextChanged(buffer, start, before, after);
6827
6828        // Hide the controllers if the amount of content changed
6829        if (before != after) {
6830            hideControllers();
6831        }
6832    }
6833
6834    /**
6835     * Not private so it can be called from an inner class without going
6836     * through a thunk.
6837     */
6838    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
6839        // XXX Make the start and end move together if this ends up
6840        // spending too much time invalidating.
6841
6842        boolean selChanged = false;
6843        int newSelStart=-1, newSelEnd=-1;
6844
6845        final InputMethodState ims = mInputMethodState;
6846
6847        if (what == Selection.SELECTION_END) {
6848            mHighlightPathBogus = true;
6849            selChanged = true;
6850            newSelEnd = newStart;
6851
6852            if (!isFocused()) {
6853                mSelectionMoved = true;
6854            }
6855
6856            if (oldStart >= 0 || newStart >= 0) {
6857                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6858                registerForPreDraw();
6859
6860                if (isFocused()) {
6861                    mShowCursor = SystemClock.uptimeMillis();
6862                    makeBlink();
6863                }
6864            }
6865        }
6866
6867        if (what == Selection.SELECTION_START) {
6868            mHighlightPathBogus = true;
6869            selChanged = true;
6870            newSelStart = newStart;
6871
6872            if (!isFocused()) {
6873                mSelectionMoved = true;
6874            }
6875
6876            if (oldStart >= 0 || newStart >= 0) {
6877                int end = Selection.getSelectionEnd(buf);
6878                invalidateCursor(end, oldStart, newStart);
6879            }
6880        }
6881
6882        if (selChanged) {
6883            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6884                if (newSelStart < 0) {
6885                    newSelStart = Selection.getSelectionStart(buf);
6886                }
6887                if (newSelEnd < 0) {
6888                    newSelEnd = Selection.getSelectionEnd(buf);
6889                }
6890                onSelectionChanged(newSelStart, newSelEnd);
6891            }
6892        }
6893
6894        if (what instanceof UpdateAppearance ||
6895            what instanceof ParagraphStyle) {
6896            if (ims == null || ims.mBatchEditNesting == 0) {
6897                invalidate();
6898                mHighlightPathBogus = true;
6899                checkForResize();
6900            } else {
6901                ims.mContentChanged = true;
6902            }
6903        }
6904
6905        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6906            mHighlightPathBogus = true;
6907            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6908                ims.mSelectionModeChanged = true;
6909            }
6910
6911            if (Selection.getSelectionStart(buf) >= 0) {
6912                if (ims == null || ims.mBatchEditNesting == 0) {
6913                    invalidateCursor();
6914                } else {
6915                    ims.mCursorChanged = true;
6916                }
6917            }
6918        }
6919
6920        if (what instanceof ParcelableSpan) {
6921            // If this is a span that can be sent to a remote process,
6922            // the current extract editor would be interested in it.
6923            if (ims != null && ims.mExtracting != null) {
6924                if (ims.mBatchEditNesting != 0) {
6925                    if (oldStart >= 0) {
6926                        if (ims.mChangedStart > oldStart) {
6927                            ims.mChangedStart = oldStart;
6928                        }
6929                        if (ims.mChangedStart > oldEnd) {
6930                            ims.mChangedStart = oldEnd;
6931                        }
6932                    }
6933                    if (newStart >= 0) {
6934                        if (ims.mChangedStart > newStart) {
6935                            ims.mChangedStart = newStart;
6936                        }
6937                        if (ims.mChangedStart > newEnd) {
6938                            ims.mChangedStart = newEnd;
6939                        }
6940                    }
6941                } else {
6942                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6943                            + oldStart + "-" + oldEnd + ","
6944                            + newStart + "-" + newEnd + what);
6945                    ims.mContentChanged = true;
6946                }
6947            }
6948        }
6949    }
6950
6951    private class ChangeWatcher
6952    implements TextWatcher, SpanWatcher {
6953
6954        private CharSequence mBeforeText;
6955
6956        public void beforeTextChanged(CharSequence buffer, int start,
6957                                      int before, int after) {
6958            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6959                    + " before=" + before + " after=" + after + ": " + buffer);
6960
6961            if (AccessibilityManager.getInstance(mContext).isEnabled()
6962                    && !isPasswordInputType(mInputType)
6963                    && !hasPasswordTransformationMethod()) {
6964                mBeforeText = buffer.toString();
6965            }
6966
6967            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6968        }
6969
6970        public void onTextChanged(CharSequence buffer, int start,
6971                                  int before, int after) {
6972            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6973                    + " before=" + before + " after=" + after + ": " + buffer);
6974            TextView.this.handleTextChanged(buffer, start, before, after);
6975
6976            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6977                    (isFocused() || isSelected() &&
6978                    isShown())) {
6979                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6980                mBeforeText = null;
6981            }
6982        }
6983
6984        public void afterTextChanged(Editable buffer) {
6985            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6986            TextView.this.sendAfterTextChanged(buffer);
6987
6988            if (MetaKeyKeyListener.getMetaState(buffer,
6989                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6990                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6991            }
6992        }
6993
6994        public void onSpanChanged(Spannable buf,
6995                                  Object what, int s, int e, int st, int en) {
6996            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6997                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6998            TextView.this.spanChange(buf, what, s, st, e, en);
6999        }
7000
7001        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7002            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7003                    + " what=" + what + ": " + buf);
7004            TextView.this.spanChange(buf, what, -1, s, -1, e);
7005        }
7006
7007        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7008            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7009                    + " what=" + what + ": " + buf);
7010            TextView.this.spanChange(buf, what, s, -1, e, -1);
7011        }
7012    }
7013
7014    private void makeBlink() {
7015        if (!isCursorVisible()) {
7016            if (mBlink != null) {
7017                mBlink.removeCallbacks(mBlink);
7018            }
7019
7020            return;
7021        }
7022
7023        if (mBlink == null)
7024            mBlink = new Blink(this);
7025
7026        mBlink.removeCallbacks(mBlink);
7027        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
7028    }
7029
7030    /**
7031     * @hide
7032     */
7033    @Override
7034    public void dispatchFinishTemporaryDetach() {
7035        mDispatchTemporaryDetach = true;
7036        super.dispatchFinishTemporaryDetach();
7037        mDispatchTemporaryDetach = false;
7038    }
7039
7040    @Override
7041    public void onStartTemporaryDetach() {
7042        super.onStartTemporaryDetach();
7043        // Only track when onStartTemporaryDetach() is called directly,
7044        // usually because this instance is an editable field in a list
7045        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7046    }
7047
7048    @Override
7049    public void onFinishTemporaryDetach() {
7050        super.onFinishTemporaryDetach();
7051        // Only track when onStartTemporaryDetach() is called directly,
7052        // usually because this instance is an editable field in a list
7053        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7054    }
7055
7056    @Override
7057    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7058        if (mTemporaryDetach) {
7059            // If we are temporarily in the detach state, then do nothing.
7060            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7061            return;
7062        }
7063
7064        mShowCursor = SystemClock.uptimeMillis();
7065
7066        ensureEndedBatchEdit();
7067
7068        if (focused) {
7069            int selStart = getSelectionStart();
7070            int selEnd = getSelectionEnd();
7071
7072            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7073            // mode for these, unless there was a specific selection already started.
7074            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7075                    selEnd == mText.length();
7076            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7077
7078            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7079                // If a tap was used to give focus to that view, move cursor at tap position.
7080                // Has to be done before onTakeFocus, which can be overloaded.
7081                final int lastTapPosition = getLastTapPosition();
7082                if (lastTapPosition >= 0) {
7083                    Selection.setSelection((Spannable) mText, lastTapPosition);
7084                }
7085
7086                if (mMovement != null) {
7087                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7088                }
7089
7090                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7091                // pressed. Since it is the ViewRoot's mView, it requests focus before
7092                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7093                // This special case ensure that we keep current selection in that case.
7094                // It would be better to know why the DecorView does not have focus at that time.
7095                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7096                        selStart >= 0 && selEnd >= 0) {
7097                    /*
7098                     * Someone intentionally set the selection, so let them
7099                     * do whatever it is that they wanted to do instead of
7100                     * the default on-focus behavior.  We reset the selection
7101                     * here instead of just skipping the onTakeFocus() call
7102                     * because some movement methods do something other than
7103                     * just setting the selection in theirs and we still
7104                     * need to go through that path.
7105                     */
7106                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7107                }
7108
7109                if (mSelectAllOnFocus) {
7110                    selectAll();
7111                }
7112
7113                mTouchFocusSelected = true;
7114            }
7115
7116            mFrozenWithFocus = false;
7117            mSelectionMoved = false;
7118
7119            if (mText instanceof Spannable) {
7120                Spannable sp = (Spannable) mText;
7121                MetaKeyKeyListener.resetMetaState(sp);
7122            }
7123
7124            makeBlink();
7125
7126            if (mError != null) {
7127                showError();
7128            }
7129        } else {
7130            if (mError != null) {
7131                hideError();
7132            }
7133            // Don't leave us in the middle of a batch edit.
7134            onEndBatchEdit();
7135
7136            hideInsertionPointCursorController();
7137            if (this instanceof ExtractEditText) {
7138                // terminateTextSelectionMode removes selection, which we want to keep when
7139                // ExtractEditText goes out of focus.
7140                final int selStart = getSelectionStart();
7141                final int selEnd = getSelectionEnd();
7142                terminateSelectionActionMode();
7143                Selection.setSelection((Spannable) mText, selStart, selEnd);
7144            } else {
7145                terminateSelectionActionMode();
7146            }
7147
7148            // No need to create the controller
7149            if (mSelectionModifierCursorController != null) {
7150                mSelectionModifierCursorController.resetTouchOffsets();
7151            }
7152        }
7153
7154        startStopMarquee(focused);
7155
7156        if (mTransformation != null) {
7157            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7158        }
7159
7160        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7161
7162        // Performed after super.onFocusChanged so that this TextView is registered and can ask for
7163        // the IME. Showing the IME while focus is moved using the D-Pad is a bad idea, however this
7164        // does not happen in that case (using the arrows on a bluetooth keyboard).
7165        if (focused && isTextEditable()) {
7166            final InputMethodManager imm = InputMethodManager.peekInstance();
7167            if (imm != null) imm.showSoftInput(this, 0, null);
7168        }
7169    }
7170
7171    private int getLastTapPosition() {
7172        // No need to create the controller at that point, no last tap position saved
7173        if (mSelectionModifierCursorController != null) {
7174            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7175            if (lastTapPosition >= 0) {
7176                // Safety check, should not be possible.
7177                if (lastTapPosition > mText.length()) {
7178                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7179                            + mText.length() + ")");
7180                    lastTapPosition = mText.length();
7181                }
7182                return lastTapPosition;
7183            }
7184        }
7185
7186        return -1;
7187    }
7188
7189    @Override
7190    public void onWindowFocusChanged(boolean hasWindowFocus) {
7191        super.onWindowFocusChanged(hasWindowFocus);
7192
7193        if (hasWindowFocus) {
7194            if (mBlink != null) {
7195                mBlink.uncancel();
7196
7197                if (isFocused()) {
7198                    mShowCursor = SystemClock.uptimeMillis();
7199                    makeBlink();
7200                }
7201            }
7202        } else {
7203            if (mBlink != null) {
7204                mBlink.cancel();
7205            }
7206            // Don't leave us in the middle of a batch edit.
7207            onEndBatchEdit();
7208            if (mInputContentType != null) {
7209                mInputContentType.enterDown = false;
7210            }
7211            hideControllers();
7212        }
7213
7214        startStopMarquee(hasWindowFocus);
7215    }
7216
7217    @Override
7218    protected void onVisibilityChanged(View changedView, int visibility) {
7219        super.onVisibilityChanged(changedView, visibility);
7220        if (visibility != VISIBLE) {
7221            hideControllers();
7222        }
7223    }
7224
7225    /**
7226     * Use {@link BaseInputConnection#removeComposingSpans
7227     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7228     * state from this text view.
7229     */
7230    public void clearComposingText() {
7231        if (mText instanceof Spannable) {
7232            BaseInputConnection.removeComposingSpans((Spannable)mText);
7233        }
7234    }
7235
7236    @Override
7237    public void setSelected(boolean selected) {
7238        boolean wasSelected = isSelected();
7239
7240        super.setSelected(selected);
7241
7242        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7243            if (selected) {
7244                startMarquee();
7245            } else {
7246                stopMarquee();
7247            }
7248        }
7249    }
7250
7251    class CommitSelectionReceiver extends ResultReceiver {
7252        private final int mPrevStart, mPrevEnd;
7253
7254        public CommitSelectionReceiver(int prevStart, int prevEnd) {
7255            super(getHandler());
7256            mPrevStart = prevStart;
7257            mPrevEnd = prevEnd;
7258        }
7259
7260        @Override
7261        protected void onReceiveResult(int resultCode, Bundle resultData) {
7262            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
7263            // by restoring its previous position.
7264            if (resultCode == InputMethodManager.RESULT_SHOWN) {
7265                final int len = mText.length();
7266                int start = Math.min(len, mPrevStart);
7267                int end = Math.min(len, mPrevEnd);
7268                Selection.setSelection((Spannable)mText, start, end);
7269
7270                boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7271                if (hasSelection() && !selectAllGotFocus) {
7272                    startSelectionActionMode();
7273                }
7274            }
7275        }
7276    }
7277
7278    @Override
7279    public boolean onTouchEvent(MotionEvent event) {
7280        final int action = event.getActionMasked();
7281
7282        if (hasInsertionController()) {
7283            getInsertionController().onTouchEvent(event);
7284        }
7285        if (hasSelectionController()) {
7286            getSelectionController().onTouchEvent(event);
7287        }
7288
7289        if (action == MotionEvent.ACTION_DOWN) {
7290            mLastDownPositionX = (int) event.getX();
7291            mLastDownPositionY = (int) event.getY();
7292
7293            // Reset this state; it will be re-set if super.onTouchEvent
7294            // causes focus to move to the view.
7295            mTouchFocusSelected = false;
7296            mIgnoreActionUpEvent = false;
7297        }
7298
7299        final boolean superResult = super.onTouchEvent(event);
7300
7301        /*
7302         * Don't handle the release after a long press, because it will
7303         * move the selection away from whatever the menu action was
7304         * trying to affect.
7305         */
7306        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7307            mDiscardNextActionUp = false;
7308            return superResult;
7309        }
7310
7311        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7312                isFocused();
7313
7314        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7315                && mText instanceof Spannable && mLayout != null) {
7316            boolean handled = false;
7317
7318            // Save previous selection, in case this event is used to show the IME.
7319            int oldSelStart = getSelectionStart();
7320            int oldSelEnd = getSelectionEnd();
7321
7322            final int oldScrollX = mScrollX;
7323            final int oldScrollY = mScrollY;
7324
7325            if (mMovement != null) {
7326                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7327            }
7328
7329            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7330                // The LinkMovementMethod which should handle taps on links has not been installed
7331                // to support text selection. We reproduce its behavior here to open links.
7332                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7333                        getSelectionEnd(), ClickableSpan.class);
7334
7335                if (links.length != 0) {
7336                    links[0].onClick(this);
7337                    handled = true;
7338                }
7339            }
7340
7341            if (isTextEditable() || mTextIsSelectable) {
7342                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
7343                    // Hide insertion anchor while scrolling. Leave selection.
7344                    hideInsertionPointCursorController();
7345                    // No need to create the controller, since there is nothing to update.
7346                    if (mSelectionModifierCursorController != null &&
7347                            mSelectionModifierCursorController.isShowing()) {
7348                        mSelectionModifierCursorController.updatePosition();
7349                    }
7350                }
7351
7352                if (touchIsFinished) {
7353                    CommitSelectionReceiver csr = null;
7354                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
7355                            didTouchFocusSelect()) {
7356                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
7357                    }
7358
7359                    // Show the IME, except when selecting in read-only text.
7360                    if (!mTextIsSelectable) {
7361                        final InputMethodManager imm = InputMethodManager.peekInstance();
7362                        handled |= imm != null && imm.showSoftInput(this, 0, csr) && (csr != null);
7363                    }
7364
7365                    stopSelectionActionMode();
7366                    boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7367                    if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7368                        getInsertionController().show();
7369                    }
7370                }
7371            }
7372
7373            if (handled) {
7374                return true;
7375            }
7376        }
7377
7378        return superResult;
7379    }
7380
7381    private void prepareCursorControllers() {
7382        boolean windowSupportsHandles = false;
7383
7384        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7385        if (params instanceof WindowManager.LayoutParams) {
7386            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7387            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7388                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7389        }
7390
7391        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7392        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7393                mLayout != null;
7394
7395        if (!mInsertionControllerEnabled) {
7396            hideInsertionPointCursorController();
7397            if (mInsertionPointCursorController != null) {
7398                mInsertionPointCursorController.onDetached();
7399                mInsertionPointCursorController = null;
7400            }
7401        }
7402
7403        if (!mSelectionControllerEnabled) {
7404            stopSelectionActionMode();
7405            if (mSelectionModifierCursorController != null) {
7406                mSelectionModifierCursorController.onDetached();
7407                mSelectionModifierCursorController = null;
7408            }
7409        }
7410    }
7411
7412    /**
7413     * @return True iff this TextView contains a text that can be edited, or if this is
7414     * a selectable TextView.
7415     */
7416    private boolean isTextEditable() {
7417        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7418    }
7419
7420    /**
7421     * Returns true, only while processing a touch gesture, if the initial
7422     * touch down event caused focus to move to the text view and as a result
7423     * its selection changed.  Only valid while processing the touch gesture
7424     * of interest.
7425     */
7426    public boolean didTouchFocusSelect() {
7427        return mTouchFocusSelected;
7428    }
7429
7430    @Override
7431    public void cancelLongPress() {
7432        super.cancelLongPress();
7433        mIgnoreActionUpEvent = true;
7434    }
7435
7436    @Override
7437    public boolean onTrackballEvent(MotionEvent event) {
7438        if (mMovement != null && mText instanceof Spannable &&
7439            mLayout != null) {
7440            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7441                return true;
7442            }
7443        }
7444
7445        return super.onTrackballEvent(event);
7446    }
7447
7448    public void setScroller(Scroller s) {
7449        mScroller = s;
7450    }
7451
7452    private static class Blink extends Handler implements Runnable {
7453        private final WeakReference<TextView> mView;
7454        private boolean mCancelled;
7455
7456        public Blink(TextView v) {
7457            mView = new WeakReference<TextView>(v);
7458        }
7459
7460        public void run() {
7461            if (mCancelled) {
7462                return;
7463            }
7464
7465            removeCallbacks(Blink.this);
7466
7467            TextView tv = mView.get();
7468
7469            if (tv != null && tv.isFocused()) {
7470                int st = tv.getSelectionStart();
7471                int en = tv.getSelectionEnd();
7472
7473                if (st == en && st >= 0 && en >= 0) {
7474                    if (tv.mLayout != null) {
7475                        tv.invalidateCursorPath();
7476                    }
7477
7478                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7479                }
7480            }
7481        }
7482
7483        void cancel() {
7484            if (!mCancelled) {
7485                removeCallbacks(Blink.this);
7486                mCancelled = true;
7487            }
7488        }
7489
7490        void uncancel() {
7491            mCancelled = false;
7492        }
7493    }
7494
7495    @Override
7496    protected float getLeftFadingEdgeStrength() {
7497        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7498        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7499            if (mMarquee != null && !mMarquee.isStopped()) {
7500                final Marquee marquee = mMarquee;
7501                if (marquee.shouldDrawLeftFade()) {
7502                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7503                } else {
7504                    return 0.0f;
7505                }
7506            } else if (getLineCount() == 1) {
7507                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7508                    case Gravity.LEFT:
7509                        return 0.0f;
7510                    case Gravity.RIGHT:
7511                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7512                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7513                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7514                    case Gravity.CENTER_HORIZONTAL:
7515                        return 0.0f;
7516                }
7517            }
7518        }
7519        return super.getLeftFadingEdgeStrength();
7520    }
7521
7522    @Override
7523    protected float getRightFadingEdgeStrength() {
7524        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7525        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7526            if (mMarquee != null && !mMarquee.isStopped()) {
7527                final Marquee marquee = mMarquee;
7528                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7529            } else if (getLineCount() == 1) {
7530                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7531                    case Gravity.LEFT:
7532                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7533                                getCompoundPaddingRight();
7534                        final float lineWidth = mLayout.getLineWidth(0);
7535                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7536                    case Gravity.RIGHT:
7537                        return 0.0f;
7538                    case Gravity.CENTER_HORIZONTAL:
7539                    case Gravity.FILL_HORIZONTAL:
7540                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7541                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7542                                getHorizontalFadingEdgeLength();
7543                }
7544            }
7545        }
7546        return super.getRightFadingEdgeStrength();
7547    }
7548
7549    @Override
7550    protected int computeHorizontalScrollRange() {
7551        if (mLayout != null) {
7552            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7553                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7554        }
7555
7556        return super.computeHorizontalScrollRange();
7557    }
7558
7559    @Override
7560    protected int computeVerticalScrollRange() {
7561        if (mLayout != null)
7562            return mLayout.getHeight();
7563
7564        return super.computeVerticalScrollRange();
7565    }
7566
7567    @Override
7568    protected int computeVerticalScrollExtent() {
7569        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7570    }
7571
7572    public enum BufferType {
7573        NORMAL, SPANNABLE, EDITABLE,
7574    }
7575
7576    /**
7577     * Returns the TextView_textColor attribute from the
7578     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7579     * from the TextView_textAppearance attribute, if TextView_textColor
7580     * was not set directly.
7581     */
7582    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7583        ColorStateList colors;
7584        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7585                                         TextView_textColor);
7586
7587        if (colors == null) {
7588            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7589                                         TextView_textAppearance, -1);
7590            if (ap != -1) {
7591                TypedArray appearance;
7592                appearance = context.obtainStyledAttributes(ap,
7593                                            com.android.internal.R.styleable.TextAppearance);
7594                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7595                                                  TextAppearance_textColor);
7596                appearance.recycle();
7597            }
7598        }
7599
7600        return colors;
7601    }
7602
7603    /**
7604     * Returns the default color from the TextView_textColor attribute
7605     * from the AttributeSet, if set, or the default color from the
7606     * TextAppearance_textColor from the TextView_textAppearance attribute,
7607     * if TextView_textColor was not set directly.
7608     */
7609    public static int getTextColor(Context context,
7610                                   TypedArray attrs,
7611                                   int def) {
7612        ColorStateList colors = getTextColors(context, attrs);
7613
7614        if (colors == null) {
7615            return def;
7616        } else {
7617            return colors.getDefaultColor();
7618        }
7619    }
7620
7621    @Override
7622    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7623        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7624        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7625            switch (keyCode) {
7626            case KeyEvent.KEYCODE_A:
7627                if (canSelectText()) {
7628                    return onTextContextMenuItem(ID_SELECT_ALL);
7629                }
7630                break;
7631            case KeyEvent.KEYCODE_X:
7632                if (canCut()) {
7633                    return onTextContextMenuItem(ID_CUT);
7634                }
7635                break;
7636            case KeyEvent.KEYCODE_C:
7637                if (canCopy()) {
7638                    return onTextContextMenuItem(ID_COPY);
7639                }
7640                break;
7641            case KeyEvent.KEYCODE_V:
7642                if (canPaste()) {
7643                    return onTextContextMenuItem(ID_PASTE);
7644                }
7645                break;
7646            }
7647        }
7648        return super.onKeyShortcut(keyCode, event);
7649    }
7650
7651    /**
7652     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7653     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7654     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7655     */
7656    private boolean canSelectText() {
7657        return hasSelectionController() && mText.length() != 0;
7658    }
7659
7660    /**
7661     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7662     * The text must be spannable and the movement method must allow for arbitary selection.
7663     *
7664     * See also {@link #canSelectText()}.
7665     */
7666    private boolean textCanBeSelected() {
7667        // prepareCursorController() relies on this method.
7668        // If you change this condition, make sure prepareCursorController is called anywhere
7669        // the value of this condition might be changed.
7670        return mText instanceof Spannable && mMovement != null && mMovement.canSelectArbitrarily();
7671    }
7672
7673    private boolean canCut() {
7674        if (hasPasswordTransformationMethod()) {
7675            return false;
7676        }
7677
7678        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
7679            return true;
7680        }
7681
7682        return false;
7683    }
7684
7685    private boolean canCopy() {
7686        if (hasPasswordTransformationMethod()) {
7687            return false;
7688        }
7689
7690        if (mText.length() > 0 && hasSelection()) {
7691            return true;
7692        }
7693
7694        return false;
7695    }
7696
7697    private boolean canPaste() {
7698        return (mText instanceof Editable &&
7699                mInput != null &&
7700                getSelectionStart() >= 0 &&
7701                getSelectionEnd() >= 0 &&
7702                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7703                hasPrimaryClip());
7704    }
7705
7706    private boolean isWordCharacter(int c, int type) {
7707        return (c == '\'' || c == '"' ||
7708                type == Character.UPPERCASE_LETTER ||
7709                type == Character.LOWERCASE_LETTER ||
7710                type == Character.TITLECASE_LETTER ||
7711                type == Character.MODIFIER_LETTER ||
7712                type == Character.OTHER_LETTER || // Should handle asian characters
7713                type == Character.DECIMAL_DIGIT_NUMBER);
7714    }
7715
7716    /**
7717     * Returns the offsets delimiting the 'word' located at position offset.
7718     *
7719     * @param offset An offset in the text.
7720     * @return The offsets for the start and end of the word located at <code>offset</code>.
7721     * The two ints offsets are packed in a long using {@link #packRangeInLong(int, int)}.
7722     * Returns -1 if no valid word was found.
7723     */
7724    private long getWordLimitsAt(int offset) {
7725        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7726        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7727
7728        // Text selection is not permitted in password fields
7729        if (hasPasswordTransformationMethod()) {
7730            return -1;
7731        }
7732
7733        final int len = mText.length();
7734
7735        // Specific text fields: always select the entire text
7736        if (klass == InputType.TYPE_CLASS_NUMBER ||
7737                klass == InputType.TYPE_CLASS_PHONE ||
7738                klass == InputType.TYPE_CLASS_DATETIME ||
7739                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7740                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7741                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7742                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7743            return len > 0 ? packRangeInLong(0, len) : -1;
7744        }
7745
7746        int end = Math.min(offset, len);
7747        if (end < 0) {
7748            return -1;
7749        }
7750
7751        final int MAX_LENGTH = 48;
7752        int start = end;
7753
7754        for (; start > 0; start--) {
7755            final char c = mTransformed.charAt(start - 1);
7756            final int type = Character.getType(c);
7757            if (start == end && type == Character.OTHER_PUNCTUATION) {
7758                // Cases where the text ends with a '.' and we select from the end of the line
7759                // (right after the dot), or when we select from the space character in "aaa, bbb".
7760                continue;
7761            }
7762            if (type == Character.SURROGATE) { // Two Character codepoint
7763                end = start - 1; // Recheck as a pair when scanning forward
7764                continue;
7765            }
7766            if (!isWordCharacter(c, type)) break;
7767            if ((end - start) > MAX_LENGTH) return -1;
7768        }
7769
7770        for (; end < len; end++) {
7771            final int c = Character.codePointAt(mTransformed, end);
7772            final int type = Character.getType(c);
7773            if (!isWordCharacter(c, type)) break;
7774            if ((end - start) > MAX_LENGTH) return -1;
7775            if (c > 0xFFFF) { // Two Character codepoint
7776                end++;
7777            }
7778        }
7779
7780        if (start == end) {
7781            return -1;
7782        }
7783
7784        // Two ints packed in a long
7785        return packRangeInLong(start, end);
7786    }
7787
7788    private static long packRangeInLong(int start, int end) {
7789        return (((long) start) << 32) | end;
7790    }
7791
7792    private static int extractRangeStartFromLong(long range) {
7793        return (int) (range >>> 32);
7794    }
7795
7796    private static int extractRangeEndFromLong(long range) {
7797        return (int) (range & 0x00000000FFFFFFFFL);
7798    }
7799
7800    private void selectAll() {
7801        Selection.setSelection((Spannable) mText, 0, mText.length());
7802    }
7803
7804    private void selectCurrentWord() {
7805        if (!canSelectText()) {
7806            return;
7807        }
7808
7809        if (hasPasswordTransformationMethod()) {
7810            // Always select all on a password field.
7811            // Cut/copy menu entries are not available for passwords, but being able to select all
7812            // is however useful to delete or paste to replace the entire content.
7813            selectAll();
7814            return;
7815        }
7816
7817        long lastTouchOffsets = getLastTouchOffsets();
7818        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
7819        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
7820
7821        int selectionStart, selectionEnd;
7822
7823        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7824        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7825        if (urlSpans.length == 1) {
7826            URLSpan url = urlSpans[0];
7827            selectionStart = ((Spanned) mText).getSpanStart(url);
7828            selectionEnd = ((Spanned) mText).getSpanEnd(url);
7829        } else {
7830            long wordLimits = getWordLimitsAt(minOffset);
7831            if (wordLimits >= 0) {
7832                selectionStart = extractRangeStartFromLong(wordLimits);
7833            } else {
7834                selectionStart = Math.max(minOffset - 5, 0);
7835            }
7836
7837            wordLimits = getWordLimitsAt(maxOffset);
7838            if (wordLimits >= 0) {
7839                selectionEnd = extractRangeEndFromLong(wordLimits);
7840            } else {
7841                selectionEnd = Math.min(maxOffset + 5, mText.length());
7842            }
7843        }
7844
7845        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7846    }
7847
7848    private long getLastTouchOffsets() {
7849        int minOffset, maxOffset;
7850
7851        if (mContextMenuTriggeredByKey) {
7852            minOffset = getSelectionStart();
7853            maxOffset = getSelectionEnd();
7854        } else {
7855            SelectionModifierCursorController selectionController = getSelectionController();
7856            minOffset = selectionController.getMinTouchOffset();
7857            maxOffset = selectionController.getMaxTouchOffset();
7858        }
7859
7860        return packRangeInLong(minOffset, maxOffset);
7861    }
7862
7863    @Override
7864    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7865        if (!isShown()) {
7866            return false;
7867        }
7868
7869        final boolean isPassword = hasPasswordTransformationMethod();
7870
7871        if (!isPassword) {
7872            CharSequence text = getText();
7873            if (TextUtils.isEmpty(text)) {
7874                text = getHint();
7875            }
7876            if (!TextUtils.isEmpty(text)) {
7877                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7878                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7879                }
7880                event.getText().add(text);
7881            }
7882        } else {
7883            event.setPassword(isPassword);
7884        }
7885        return false;
7886    }
7887
7888    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7889            int fromIndex, int removedCount, int addedCount) {
7890        AccessibilityEvent event =
7891            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7892        event.setFromIndex(fromIndex);
7893        event.setRemovedCount(removedCount);
7894        event.setAddedCount(addedCount);
7895        event.setBeforeText(beforeText);
7896        sendAccessibilityEventUnchecked(event);
7897    }
7898
7899    @Override
7900    protected void onCreateContextMenu(ContextMenu menu) {
7901        super.onCreateContextMenu(menu);
7902        boolean added = false;
7903        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7904        // Problem with context menu on long press: the menu appears while the key in down and when
7905        // the key is released, the view does not receive the key_up event.
7906        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
7907        // events. We cannot simply clear these flags in onTextContextMenuItem since
7908        // it may not be called (if the user/ discards the context menu with the back key).
7909        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
7910        // available in onTextContextMenuItem.
7911        mDPadCenterIsDown = mEnterKeyIsDown = false;
7912
7913        MenuHandler handler = new MenuHandler();
7914
7915        if (mText instanceof Spanned && hasSelectionController()) {
7916            long lastTouchOffset = getLastTouchOffsets();
7917            final int selStart = extractRangeStartFromLong(lastTouchOffset);
7918            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
7919
7920            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
7921            if (urls.length > 0) {
7922                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7923                        setOnMenuItemClickListener(handler);
7924
7925                added = true;
7926            }
7927        }
7928
7929        // The context menu is not empty, which will prevent the selection mode from starting.
7930        // Add a entry to start it in the context menu.
7931        // TODO Does not handle the case where a subclass does not call super.thisMethod or
7932        // populates the menu AFTER this call.
7933        if (menu.size() > 0) {
7934            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
7935                    setOnMenuItemClickListener(handler);
7936            added = true;
7937        }
7938
7939        if (added) {
7940            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7941        }
7942    }
7943
7944    /**
7945     * Returns whether this text view is a current input method target.  The
7946     * default implementation just checks with {@link InputMethodManager}.
7947     */
7948    public boolean isInputMethodTarget() {
7949        InputMethodManager imm = InputMethodManager.peekInstance();
7950        return imm != null && imm.isActive(this);
7951    }
7952
7953    // Selection context mode
7954    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7955    private static final int ID_CUT = android.R.id.cut;
7956    private static final int ID_COPY = android.R.id.copy;
7957    private static final int ID_PASTE = android.R.id.paste;
7958    // Context menu entries
7959    private static final int ID_COPY_URL = android.R.id.copyUrl;
7960    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
7961
7962    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7963        public boolean onMenuItemClick(MenuItem item) {
7964            return onTextContextMenuItem(item.getItemId());
7965        }
7966    }
7967
7968    /**
7969     * Called when a context menu option for the text view is selected.  Currently
7970     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
7971     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
7972     * or {@link android.R.id#copy}.
7973     */
7974    public boolean onTextContextMenuItem(int id) {
7975        int min = 0;
7976        int max = mText.length();
7977
7978        if (isFocused()) {
7979            final int selStart = getSelectionStart();
7980            final int selEnd = getSelectionEnd();
7981
7982            min = Math.max(0, Math.min(selStart, selEnd));
7983            max = Math.max(0, Math.max(selStart, selEnd));
7984        }
7985
7986        switch (id) {
7987            case ID_COPY_URL:
7988                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7989                if (urls.length >= 1) {
7990                    ClipData clip = null;
7991                    for (int i=0; i<urls.length; i++) {
7992                        Uri uri = Uri.parse(urls[0].getURL());
7993                        if (clip == null) {
7994                            clip = ClipData.newRawUri(null, uri);
7995                        } else {
7996                            clip.addItem(new ClipData.Item(uri));
7997                        }
7998                    }
7999                    if (clip != null) {
8000                        setPrimaryClip(clip);
8001                    }
8002                }
8003                stopSelectionActionMode();
8004                return true;
8005
8006            case ID_SELECTION_MODE:
8007                if (mSelectionActionMode != null) {
8008                    // Selection mode is already started, simply change selected part.
8009                    updateSelectedRegion();
8010                } else {
8011                    startSelectionActionMode();
8012                }
8013                return true;
8014
8015            case ID_SELECT_ALL:
8016                selectAll();
8017                // Update controller positions after selection change.
8018                if (hasSelectionController()) {
8019                    getSelectionController().show();
8020                }
8021                return true;
8022
8023            case ID_PASTE:
8024                paste(min, max);
8025                return true;
8026
8027            case ID_CUT:
8028                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8029                ((Editable) mText).delete(min, max);
8030                stopSelectionActionMode();
8031                return true;
8032
8033            case ID_COPY:
8034                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8035                stopSelectionActionMode();
8036                return true;
8037        }
8038        return false;
8039    }
8040
8041    /**
8042     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8043     * by [min, max] when replacing this region by paste.
8044     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8045     * make sure we do not add an extra one from the paste content.
8046     */
8047    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8048        if (paste.length() > 0) {
8049            if (min > 0) {
8050                final char charBefore = mTransformed.charAt(min - 1);
8051                final char charAfter = paste.charAt(0);
8052
8053                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8054                    // Two spaces at beginning of paste: remove one
8055                    final int originalLength = mText.length();
8056                    ((Editable) mText).delete(min - 1, min);
8057                    // Due to filters, there is no guarantee that exactly one character was
8058                    // removed: count instead.
8059                    final int delta = mText.length() - originalLength;
8060                    min += delta;
8061                    max += delta;
8062                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8063                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8064                    // No space at beginning of paste: add one
8065                    final int originalLength = mText.length();
8066                    ((Editable) mText).replace(min, min, " ");
8067                    // Taking possible filters into account as above.
8068                    final int delta = mText.length() - originalLength;
8069                    min += delta;
8070                    max += delta;
8071                }
8072            }
8073
8074            if (max < mText.length()) {
8075                final char charBefore = paste.charAt(paste.length() - 1);
8076                final char charAfter = mTransformed.charAt(max);
8077
8078                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8079                    // Two spaces at end of paste: remove one
8080                    ((Editable) mText).delete(max, max + 1);
8081                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8082                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8083                    // No space at end of paste: add one
8084                    ((Editable) mText).replace(max, max, " ");
8085                }
8086            }
8087        }
8088
8089        return packRangeInLong(min, max);
8090    }
8091
8092    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8093        TextView shadowView = (TextView) inflate(mContext,
8094                com.android.internal.R.layout.text_drag_thumbnail, null);
8095
8096        if (shadowView == null) {
8097            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8098        }
8099
8100        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8101            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8102        }
8103        shadowView.setText(text);
8104        shadowView.setTextColor(getTextColors());
8105
8106        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8107        shadowView.setGravity(Gravity.CENTER);
8108
8109        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8110                ViewGroup.LayoutParams.WRAP_CONTENT));
8111
8112        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8113        shadowView.measure(size, size);
8114
8115        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8116        shadowView.invalidate();
8117        return new DragShadowBuilder(shadowView);
8118    }
8119
8120    private static class DragLocalState {
8121        public TextView sourceTextView;
8122        public int start, end;
8123
8124        public DragLocalState(TextView sourceTextView, int start, int end) {
8125            this.sourceTextView = sourceTextView;
8126            this.start = start;
8127            this.end = end;
8128        }
8129    }
8130
8131    @Override
8132    public boolean performLongClick() {
8133        if (super.performLongClick()) {
8134            mDiscardNextActionUp = true;
8135            return true;
8136        }
8137
8138        // Long press in empty space moves cursor and shows the Paste affordance if available.
8139        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8140                mInsertionControllerEnabled) {
8141            final int offset = getOffset(mLastDownPositionX, mLastDownPositionY);
8142            stopSelectionActionMode();
8143            Selection.setSelection((Spannable)mText, offset);
8144            getInsertionController().show(0);
8145            mDiscardNextActionUp = true;
8146            return true;
8147        }
8148
8149        if (mSelectionActionMode != null) {
8150            if (touchPositionIsInSelection()) {
8151                // Start a drag
8152                final int start = getSelectionStart();
8153                final int end = getSelectionEnd();
8154                CharSequence selectedText = mTransformed.subSequence(start, end);
8155                ClipData data = ClipData.newPlainText(null, selectedText);
8156                DragLocalState localState = new DragLocalState(this, start, end);
8157                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8158                stopSelectionActionMode();
8159            } else {
8160                updateSelectedRegion();
8161            }
8162            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8163            mDiscardNextActionUp = true;
8164            return true;
8165        }
8166
8167        // Start a new selection
8168        if (startSelectionActionMode()) {
8169            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8170            mDiscardNextActionUp = true;
8171            return true;
8172        }
8173
8174        return false;
8175    }
8176
8177    /**
8178     * When selection mode is already started, this method simply updates the selected part of text
8179     * to the text under the finger.
8180     */
8181    private void updateSelectedRegion() {
8182        // Start a new selection at current position, keep selectionAction mode on
8183        selectCurrentWord();
8184        // Updates handles' positions
8185        getSelectionController().show();
8186    }
8187
8188    private boolean touchPositionIsInSelection() {
8189        int selectionStart = getSelectionStart();
8190        int selectionEnd = getSelectionEnd();
8191
8192        if (selectionStart == selectionEnd) {
8193            return false;
8194        }
8195
8196        if (selectionStart > selectionEnd) {
8197            int tmp = selectionStart;
8198            selectionStart = selectionEnd;
8199            selectionEnd = tmp;
8200            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8201        }
8202
8203        SelectionModifierCursorController selectionController = getSelectionController();
8204        int minOffset = selectionController.getMinTouchOffset();
8205        int maxOffset = selectionController.getMaxTouchOffset();
8206
8207        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8208    }
8209
8210    /**
8211     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8212     * selection is initiated in this View.
8213     *
8214     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8215     * Paste actions, depending on what this View supports.
8216     *
8217     * A custom implementation can add new entries in the default menu in its
8218     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
8219     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
8220     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
8221     * {@link android.R.id#paste} ids as parameters.
8222     *
8223     * Returning false from {@link ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will
8224     * prevent the action mode from being started.
8225     *
8226     * Action click events should be handled by the custom implementation of
8227     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8228     *
8229     * Note that text selection mode is not started when a TextView receives focus and the
8230     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8231     * that case, to allow for quick replacement.
8232     */
8233    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8234        mCustomSelectionActionModeCallback = actionModeCallback;
8235    }
8236
8237    /**
8238     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8239     *
8240     * @return The current custom selection callback.
8241     */
8242    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8243        return mCustomSelectionActionModeCallback;
8244    }
8245
8246    /**
8247     *
8248     * @return true if the selection mode was actually started.
8249     */
8250    private boolean startSelectionActionMode() {
8251        if (mSelectionActionMode != null) {
8252            // Selection action mode is already started
8253            return false;
8254        }
8255
8256        if (!canSelectText() || !requestFocus()) {
8257            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8258            return false;
8259        }
8260
8261        if (!hasSelection()) {
8262            // If selection mode is started after a device rotation, there is already a selection.
8263            selectCurrentWord();
8264        }
8265
8266        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8267        mSelectionActionMode = startActionMode(actionModeCallback);
8268        final boolean selectionStarted = mSelectionActionMode != null;
8269
8270        if (selectionStarted && !mTextIsSelectable) {
8271            // Show the IME to be able to replace text, except when selecting non editable text.
8272            final InputMethodManager imm = InputMethodManager.peekInstance();
8273            if (imm != null) imm.showSoftInput(this, 0, null);
8274        }
8275
8276        return selectionStarted;
8277    }
8278
8279    /**
8280     * Same as {@link #stopSelectionActionMode()}, except that there is no cursor controller
8281     * fade out animation. Needed since the drawable and their alpha values are shared by all
8282     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
8283     * new one otherwise.
8284     */
8285    private void terminateSelectionActionMode() {
8286        stopSelectionActionMode();
8287
8288        // No need to create the controller, nothing to cancel in that case.
8289        if (mSelectionModifierCursorController != null) {
8290            mSelectionModifierCursorController.cancelFadeOutAnimation();
8291        }
8292    }
8293
8294    private void stopSelectionActionMode() {
8295        if (mSelectionActionMode != null) {
8296            // This will hide the mSelectionModifierCursorController
8297            mSelectionActionMode.finish();
8298        }
8299    }
8300
8301    /**
8302     * Paste clipboard content between min and max positions.
8303     */
8304    private void paste(int min, int max) {
8305        ClipboardManager clipboard =
8306            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8307        ClipData clip = clipboard.getPrimaryClip();
8308        if (clip != null) {
8309            boolean didfirst = false;
8310            for (int i=0; i<clip.getItemCount(); i++) {
8311                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
8312                if (paste != null) {
8313                    if (!didfirst) {
8314                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8315                        min = extractRangeStartFromLong(minMax);
8316                        max = extractRangeEndFromLong(minMax);
8317                        Selection.setSelection((Spannable) mText, max);
8318                        ((Editable) mText).replace(min, max, paste);
8319                    } else {
8320                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8321                        ((Editable) mText).insert(getSelectionEnd(), paste);
8322                    }
8323                }
8324            }
8325            stopSelectionActionMode();
8326            sLastCutOrCopyTime = 0;
8327        }
8328    }
8329
8330    private void setPrimaryClip(ClipData clip) {
8331        ClipboardManager clipboard = (ClipboardManager) getContext().
8332                getSystemService(Context.CLIPBOARD_SERVICE);
8333        clipboard.setPrimaryClip(clip);
8334        sLastCutOrCopyTime = SystemClock.uptimeMillis();
8335    }
8336
8337    /**
8338     * An ActionMode Callback class that is used to provide actions while in text selection mode.
8339     *
8340     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
8341     * on which of these this TextView supports.
8342     */
8343    private class SelectionActionModeCallback implements ActionMode.Callback {
8344
8345        @Override
8346        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
8347            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
8348
8349            mode.setTitle(mContext.getString(com.android.internal.R.string.textSelectionCABTitle));
8350            mode.setSubtitle(null);
8351
8352            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
8353                    setAlphabeticShortcut('a').
8354                    setShowAsAction(
8355                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8356
8357            if (canCut()) {
8358                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
8359                    setIcon(styledAttributes.getResourceId(
8360                            R.styleable.Theme_actionModeCutDrawable, 0)).
8361                    setAlphabeticShortcut('x').
8362                    setShowAsAction(
8363                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8364            }
8365
8366            if (canCopy()) {
8367                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
8368                    setIcon(styledAttributes.getResourceId(
8369                            R.styleable.Theme_actionModeCopyDrawable, 0)).
8370                    setAlphabeticShortcut('c').
8371                    setShowAsAction(
8372                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8373            }
8374
8375            if (canPaste()) {
8376                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
8377                        setIcon(styledAttributes.getResourceId(
8378                                R.styleable.Theme_actionModePasteDrawable, 0)).
8379                        setAlphabeticShortcut('v').
8380                        setShowAsAction(
8381                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8382            }
8383
8384            styledAttributes.recycle();
8385
8386            if (mCustomSelectionActionModeCallback != null) {
8387                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
8388                    // The custom mode can choose to cancel the action mode
8389                    return false;
8390                }
8391            }
8392
8393            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
8394                getSelectionController().show();
8395                return true;
8396            } else {
8397                return false;
8398            }
8399        }
8400
8401        @Override
8402        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
8403            if (mCustomSelectionActionModeCallback != null) {
8404                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
8405            }
8406            return true;
8407        }
8408
8409        @Override
8410        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
8411            if (mCustomSelectionActionModeCallback != null &&
8412                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
8413                return true;
8414            }
8415            return onTextContextMenuItem(item.getItemId());
8416        }
8417
8418        @Override
8419        public void onDestroyActionMode(ActionMode mode) {
8420            if (mCustomSelectionActionModeCallback != null) {
8421                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
8422            }
8423            Selection.setSelection((Spannable) mText, getSelectionEnd());
8424
8425            if (mSelectionModifierCursorController != null) {
8426                mSelectionModifierCursorController.hide();
8427            }
8428
8429            mSelectionActionMode = null;
8430        }
8431    }
8432
8433    /**
8434     * A CursorController instance can be used to control a cursor in the text.
8435     * It is not used outside of {@link TextView}.
8436     * @hide
8437     */
8438    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
8439        /**
8440         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
8441         * See also {@link #hide()}.
8442         */
8443        public void show();
8444
8445        /**
8446         * Hide the cursor controller from screen.
8447         * See also {@link #show()}.
8448         */
8449        public void hide();
8450
8451        /**
8452         * @return true if the CursorController is currently visible
8453         */
8454        public boolean isShowing();
8455
8456        /**
8457         * Update the controller's position.
8458         */
8459        public void updatePosition(HandleView handle, int x, int y);
8460
8461        public void updateOffset(HandleView handle, int offset);
8462
8463        public void updatePosition();
8464
8465        public int getCurrentOffset(HandleView handle);
8466
8467        /**
8468         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
8469         * a chance to become active and/or visible.
8470         * @param event The touch event
8471         */
8472        public boolean onTouchEvent(MotionEvent event);
8473
8474        /**
8475         * Called when the view is detached from window. Perform house keeping task, such as
8476         * stopping Runnable thread that would otherwise keep a reference on the context, thus
8477         * preventing the activity to be recycled.
8478         */
8479        public void onDetached();
8480    }
8481
8482    private class PastePopupMenu implements OnClickListener {
8483        private final PopupWindow mContainer;
8484        private int mPositionX;
8485        private int mPositionY;
8486        private final View[] mPasteViews = new View[4];
8487        private final int[] mPasteViewLayouts = new int[] {
8488                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
8489                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
8490
8491        public PastePopupMenu() {
8492            mContainer = new PopupWindow(TextView.this.mContext, null,
8493                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8494            mContainer.setSplitTouchEnabled(true);
8495            mContainer.setClippingEnabled(false);
8496            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8497
8498            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8499            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8500        }
8501
8502        private int viewIndex(boolean onTop) {
8503            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
8504        }
8505
8506        private void updateContent(boolean onTop) {
8507            final int viewIndex = viewIndex(onTop);
8508            View view = mPasteViews[viewIndex];
8509
8510            if (view == null) {
8511                final int layout = mPasteViewLayouts[viewIndex];
8512                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8513                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8514                if (inflater != null) {
8515                    view = inflater.inflate(layout, null);
8516                }
8517
8518                if (view == null) {
8519                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
8520                }
8521
8522                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8523                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8524                        ViewGroup.LayoutParams.WRAP_CONTENT));
8525                view.measure(size, size);
8526
8527                view.setOnClickListener(this);
8528
8529                mPasteViews[viewIndex] = view;
8530            }
8531
8532            mContainer.setContentView(view);
8533        }
8534
8535        public void show() {
8536            updateContent(true);
8537            positionAtCursor();
8538        }
8539
8540        public void hide() {
8541            mContainer.dismiss();
8542        }
8543
8544        public boolean isShowing() {
8545            return mContainer.isShowing();
8546        }
8547
8548        @Override
8549        public void onClick(View v) {
8550            if (canPaste()) {
8551                paste(getSelectionStart(), getSelectionEnd());
8552            }
8553            hide();
8554        }
8555
8556        void positionAtCursor() {
8557            View contentView = mContainer.getContentView();
8558            int width = contentView.getMeasuredWidth();
8559            int height = contentView.getMeasuredHeight();
8560            final int offset = TextView.this.getSelectionStart();
8561            final int line = mLayout.getLineForOffset(offset);
8562            final int lineTop = mLayout.getLineTop(line);
8563            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
8564
8565            final Rect bounds = sCursorControllerTempRect;
8566            bounds.left = (int) (primaryHorizontal - width / 2.0f);
8567            bounds.top = lineTop - height;
8568
8569            bounds.right = bounds.left + width;
8570            bounds.bottom = bounds.top + height;
8571
8572            convertFromViewportToContentCoordinates(bounds);
8573
8574            mPositionX = bounds.left;
8575            mPositionY = bounds.top;
8576
8577
8578            final int[] coords = mTempCoords;
8579            TextView.this.getLocationInWindow(coords);
8580            coords[0] += mPositionX;
8581            coords[1] += mPositionY;
8582
8583            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
8584            if (coords[1] < 0) {
8585                updateContent(false);
8586                // Update dimensions from new view
8587                contentView = mContainer.getContentView();
8588                width = contentView.getMeasuredWidth();
8589                height = contentView.getMeasuredHeight();
8590
8591                // Vertical clipping, move under edited line and to the side of insertion cursor
8592                // TODO bottom clipping in case there is no system bar
8593                coords[1] += height;
8594                final int lineBottom = mLayout.getLineBottom(line);
8595                final int lineHeight = lineBottom - lineTop;
8596                coords[1] += lineHeight;
8597
8598                // Move to right hand side of insertion cursor by default. TODO RTL text.
8599                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
8600                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
8601
8602                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
8603                    coords[0] += handleHalfWidth + width / 2;
8604                } else {
8605                    coords[0] -= handleHalfWidth + width / 2;
8606                }
8607            } else {
8608                // Horizontal clipping
8609                coords[0] = Math.max(0, coords[0]);
8610                coords[0] = Math.min(screenWidth - width, coords[0]);
8611            }
8612
8613            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
8614        }
8615    }
8616
8617    private class HandleView extends View {
8618        private Drawable mDrawable;
8619        private final PopupWindow mContainer;
8620        private int mPositionX;
8621        private int mPositionY;
8622        private final CursorController mController;
8623        private boolean mIsDragging;
8624        private float mTouchToWindowOffsetX;
8625        private float mTouchToWindowOffsetY;
8626        private float mHotspotX;
8627        private float mHotspotY;
8628        private int mHeight;
8629        private float mTouchOffsetY;
8630        private int mLastParentX;
8631        private int mLastParentY;
8632        private float mDownPositionX, mDownPositionY;
8633        private int mContainerPositionX, mContainerPositionY;
8634        private long mTouchTimer;
8635        private boolean mIsInsertionHandle = false;
8636        private PastePopupMenu mPastePopupWindow;
8637
8638        // Touch-up filter: number of previous positions remembered
8639        private static final int HISTORY_SIZE = 5;
8640        private static final int TOUCH_UP_FILTER_DELAY = 150;
8641        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
8642        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
8643        private int mPreviousOffsetIndex = 0;
8644        private int mNumberPreviousOffsets = 0;
8645
8646        public void startTouchUpFilter(int offset) {
8647            mNumberPreviousOffsets = 0;
8648            addPositionToTouchUpFilter(offset);
8649        }
8650
8651        public void addPositionToTouchUpFilter(int offset) {
8652            if (mNumberPreviousOffsets > 0 &&
8653                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
8654                // Make sure only actual changes of position are recorded.
8655                return;
8656            }
8657
8658            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
8659            mPreviousOffsets[mPreviousOffsetIndex] = offset;
8660            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
8661            mNumberPreviousOffsets++;
8662        }
8663
8664        public void filterOnTouchUp() {
8665            final long now = SystemClock.uptimeMillis();
8666            int i = 0;
8667            int index = 0;
8668            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
8669            while (i < iMax) {
8670                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
8671                if ((now - mPreviousOffsetsTimes[index]) >= TOUCH_UP_FILTER_DELAY) break;
8672                i++;
8673            }
8674
8675            mController.updateOffset(this, mPreviousOffsets[index]);
8676        }
8677
8678        public static final int LEFT = 0;
8679        public static final int CENTER = 1;
8680        public static final int RIGHT = 2;
8681
8682        public HandleView(CursorController controller, int pos) {
8683            super(TextView.this.mContext);
8684            mController = controller;
8685            mContainer = new PopupWindow(TextView.this.mContext, null,
8686                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8687            mContainer.setSplitTouchEnabled(true);
8688            mContainer.setClippingEnabled(false);
8689            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8690
8691            setOrientation(pos);
8692        }
8693
8694        public void setOrientation(int pos) {
8695            int handleWidth;
8696            switch (pos) {
8697            case LEFT: {
8698                if (mSelectHandleLeft == null) {
8699                    mSelectHandleLeft = mContext.getResources().getDrawable(
8700                            mTextSelectHandleLeftRes);
8701                }
8702                mDrawable = mSelectHandleLeft;
8703                handleWidth = mDrawable.getIntrinsicWidth();
8704                mHotspotX = (handleWidth * 3) / 4;
8705                break;
8706            }
8707
8708            case RIGHT: {
8709                if (mSelectHandleRight == null) {
8710                    mSelectHandleRight = mContext.getResources().getDrawable(
8711                            mTextSelectHandleRightRes);
8712                }
8713                mDrawable = mSelectHandleRight;
8714                handleWidth = mDrawable.getIntrinsicWidth();
8715                mHotspotX = handleWidth / 4;
8716                break;
8717            }
8718
8719            case CENTER:
8720            default: {
8721                if (mSelectHandleCenter == null) {
8722                    mSelectHandleCenter = mContext.getResources().getDrawable(
8723                            mTextSelectHandleRes);
8724                }
8725                mDrawable = mSelectHandleCenter;
8726                handleWidth = mDrawable.getIntrinsicWidth();
8727                mHotspotX = handleWidth / 2;
8728                mIsInsertionHandle = true;
8729                break;
8730            }
8731            }
8732
8733            final int handleHeight = mDrawable.getIntrinsicHeight();
8734
8735            mTouchOffsetY = -handleHeight * 0.3f;
8736            mHotspotY = 0;
8737            mHeight = handleHeight;
8738            invalidate();
8739        }
8740
8741        @Override
8742        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
8743            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
8744                    mDrawable.getIntrinsicHeight());
8745        }
8746
8747        public void show() {
8748            if (!isPositionVisible()) {
8749                hide();
8750                return;
8751            }
8752            mContainer.setContentView(this);
8753            final int[] coords = mTempCoords;
8754            TextView.this.getLocationInWindow(coords);
8755            mContainerPositionX = coords[0] + mPositionX;
8756            mContainerPositionY = coords[1] + mPositionY;
8757            mContainer.showAtLocation(TextView.this, 0, mContainerPositionX, mContainerPositionY);
8758
8759            // Hide paste view when handle is moved on screen.
8760            if (mPastePopupWindow != null) {
8761                mPastePopupWindow.hide();
8762            }
8763        }
8764
8765        public void hide() {
8766            mIsDragging = false;
8767            mContainer.dismiss();
8768            if (mPastePopupWindow != null) {
8769                mPastePopupWindow.hide();
8770            }
8771        }
8772
8773        public boolean isShowing() {
8774            return mContainer.isShowing();
8775        }
8776
8777        private boolean isPositionVisible() {
8778            // Always show a dragging handle.
8779            if (mIsDragging) {
8780                return true;
8781            }
8782
8783            if (isInBatchEditMode()) {
8784                return false;
8785            }
8786
8787            final int extendedPaddingTop = getExtendedPaddingTop();
8788            final int extendedPaddingBottom = getExtendedPaddingBottom();
8789            final int compoundPaddingLeft = getCompoundPaddingLeft();
8790            final int compoundPaddingRight = getCompoundPaddingRight();
8791
8792            final TextView hostView = TextView.this;
8793            final int left = 0;
8794            final int right = hostView.getWidth();
8795            final int top = 0;
8796            final int bottom = hostView.getHeight();
8797
8798            if (mTempRect == null) {
8799                mTempRect = new Rect();
8800            }
8801            final Rect clip = mTempRect;
8802            clip.left = left + compoundPaddingLeft;
8803            clip.top = top + extendedPaddingTop;
8804            clip.right = right - compoundPaddingRight;
8805            clip.bottom = bottom - extendedPaddingBottom;
8806
8807            final ViewParent parent = hostView.getParent();
8808            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
8809                return false;
8810            }
8811
8812            final int[] coords = mTempCoords;
8813            hostView.getLocationInWindow(coords);
8814            final int posX = coords[0] + mPositionX + (int) mHotspotX;
8815            final int posY = coords[1] + mPositionY + (int) mHotspotY;
8816
8817            return posX >= clip.left && posX <= clip.right &&
8818                    posY >= clip.top && posY <= clip.bottom;
8819        }
8820
8821        private void moveTo(int x, int y) {
8822            mPositionX = x - TextView.this.mScrollX;
8823            mPositionY = y - TextView.this.mScrollY;
8824            if (isPositionVisible()) {
8825                int[] coords = null;
8826                if (mContainer.isShowing()) {
8827                    coords = mTempCoords;
8828                    TextView.this.getLocationInWindow(coords);
8829                    final int containerPositionX = coords[0] + mPositionX;
8830                    final int containerPositionY = coords[1] + mPositionY;
8831
8832                    if (containerPositionX != mContainerPositionX ||
8833                        containerPositionY != mContainerPositionY) {
8834                        mContainerPositionX = containerPositionX;
8835                        mContainerPositionY = containerPositionY;
8836
8837                        mContainer.update(mContainerPositionX, mContainerPositionY,
8838                                mRight - mLeft, mBottom - mTop);
8839
8840                        // Hide paste popup window as soon as a scroll occurs.
8841                        if (mPastePopupWindow != null) {
8842                            mPastePopupWindow.hide();
8843                        }
8844                    }
8845                } else {
8846                    show();
8847                }
8848
8849                if (mIsDragging) {
8850                    if (coords == null) {
8851                        coords = mTempCoords;
8852                        TextView.this.getLocationInWindow(coords);
8853                    }
8854                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
8855                        mTouchToWindowOffsetX += coords[0] - mLastParentX;
8856                        mTouchToWindowOffsetY += coords[1] - mLastParentY;
8857                        mLastParentX = coords[0];
8858                        mLastParentY = coords[1];
8859                    }
8860                    // Hide paste popup window as soon as the handle is dragged.
8861                    if (mPastePopupWindow != null) {
8862                        mPastePopupWindow.hide();
8863                    }
8864                }
8865            } else {
8866                hide();
8867            }
8868        }
8869
8870        @Override
8871        protected void onDraw(Canvas c) {
8872            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
8873            mDrawable.draw(c);
8874        }
8875
8876        @Override
8877        public boolean onTouchEvent(MotionEvent ev) {
8878            switch (ev.getActionMasked()) {
8879                case MotionEvent.ACTION_DOWN: {
8880                    startTouchUpFilter(mController.getCurrentOffset(this));
8881                    mDownPositionX = ev.getRawX();
8882                    mDownPositionY = ev.getRawY();
8883                    mTouchToWindowOffsetX = mDownPositionX - mPositionX;
8884                    mTouchToWindowOffsetY = mDownPositionY - mPositionY;
8885                    final int[] coords = mTempCoords;
8886                    TextView.this.getLocationInWindow(coords);
8887                    mLastParentX = coords[0];
8888                    mLastParentY = coords[1];
8889                    mIsDragging = true;
8890                    if (mIsInsertionHandle) {
8891                        mTouchTimer = SystemClock.uptimeMillis();
8892                    }
8893                    break;
8894                }
8895
8896                case MotionEvent.ACTION_MOVE: {
8897                    final float rawX = ev.getRawX();
8898                    final float rawY = ev.getRawY();
8899                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
8900                    final float newPosY = rawY - mTouchToWindowOffsetY + mHotspotY + mTouchOffsetY;
8901
8902                    mController.updatePosition(this, Math.round(newPosX), Math.round(newPosY));
8903                    break;
8904                }
8905
8906                case MotionEvent.ACTION_UP:
8907                    if (mIsInsertionHandle) {
8908                        long delay = SystemClock.uptimeMillis() - mTouchTimer;
8909                        if (delay < ViewConfiguration.getTapTimeout()) {
8910                            if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
8911                                // Tapping on the handle dismisses the displayed paste view,
8912                                mPastePopupWindow.hide();
8913                            } else {
8914                                ((InsertionPointCursorController) mController).show(0);
8915                            }
8916                        }
8917                    }
8918                    filterOnTouchUp();
8919                    mIsDragging = false;
8920                    break;
8921
8922                case MotionEvent.ACTION_CANCEL:
8923                    mIsDragging = false;
8924                    break;
8925            }
8926            return true;
8927        }
8928
8929        public boolean isDragging() {
8930            return mIsDragging;
8931        }
8932
8933        void positionAtCursor(final int offset, boolean bottom) {
8934            addPositionToTouchUpFilter(offset);
8935            final int width = mDrawable.getIntrinsicWidth();
8936            final int height = mDrawable.getIntrinsicHeight();
8937            final int line = mLayout.getLineForOffset(offset);
8938            final int lineTop = mLayout.getLineTop(line);
8939            final int lineBottom = mLayout.getLineBottom(line);
8940
8941            final Rect bounds = sCursorControllerTempRect;
8942            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - mHotspotX)
8943                + TextView.this.mScrollX;
8944            bounds.top = (bottom ? lineBottom : lineTop - mHeight) + TextView.this.mScrollY;
8945
8946            bounds.right = bounds.left + width;
8947            bounds.bottom = bounds.top + height;
8948
8949            convertFromViewportToContentCoordinates(bounds);
8950            moveTo(bounds.left, bounds.top);
8951        }
8952
8953        void showPastePopupWindow() {
8954            if (mIsInsertionHandle) {
8955                if (mPastePopupWindow == null) {
8956                    // Lazy initialisation: create when actually shown only.
8957                    mPastePopupWindow = new PastePopupMenu();
8958                }
8959                mPastePopupWindow.show();
8960            }
8961        }
8962    }
8963
8964    private class InsertionPointCursorController implements CursorController {
8965        private static final int DELAY_BEFORE_FADE_OUT = 4100;
8966        private static final int DELAY_BEFORE_PASTE = 2000;
8967        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000;
8968
8969        // The cursor controller image. Lazily created.
8970        private HandleView mHandle;
8971        private Runnable mHider;
8972        private Runnable mPastePopupShower;
8973
8974        public void show() {
8975            show(DELAY_BEFORE_PASTE);
8976        }
8977
8978        public void show(int delayBeforePaste) {
8979            updatePosition();
8980            hideDelayed();
8981            getHandle().show();
8982            removePastePopupCallback();
8983            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
8984            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
8985                delayBeforePaste = 0;
8986            }
8987            if (delayBeforePaste == 0 || canPaste()) {
8988                if (mPastePopupShower == null) {
8989                    mPastePopupShower = new Runnable() {
8990                        public void run() {
8991                            getHandle().showPastePopupWindow();
8992                        }
8993                    };
8994                }
8995                postDelayed(mPastePopupShower, delayBeforePaste);
8996            }
8997        }
8998
8999        private void removePastePopupCallback() {
9000            if (mPastePopupShower != null) {
9001                removeCallbacks(mPastePopupShower);
9002            }
9003        }
9004
9005        private void removeHiderCallback() {
9006            if (mHider != null) {
9007                removeCallbacks(mHider);
9008            }
9009        }
9010
9011        public void hide() {
9012            if (mHandle != null) {
9013                mHandle.hide();
9014            }
9015            removeHiderCallback();
9016            removePastePopupCallback();
9017        }
9018
9019        private void hideDelayed() {
9020            removeHiderCallback();
9021            if (mHider == null) {
9022                mHider = new Runnable() {
9023                    public void run() {
9024                        hide();
9025                    }
9026                };
9027            }
9028            postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
9029        }
9030
9031        public boolean isShowing() {
9032            return mHandle != null && mHandle.isShowing();
9033        }
9034
9035        public void updatePosition(HandleView handle, int x, int y) {
9036            final int previousOffset = getSelectionStart();
9037            int offset = getHysteresisOffset(x, y, previousOffset);
9038
9039            if (offset != previousOffset) {
9040                updateOffset(handle, offset);
9041                removePastePopupCallback();
9042            }
9043            hideDelayed();
9044        }
9045
9046        public void updateOffset(HandleView handle, int offset) {
9047            Selection.setSelection((Spannable) mText, offset);
9048            updatePosition();
9049        }
9050
9051        public void updatePosition() {
9052            final int offset = getSelectionStart();
9053
9054            if (offset < 0) {
9055                // Should never happen, safety check.
9056                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
9057                hide();
9058                return;
9059            }
9060
9061            getHandle().positionAtCursor(offset, true);
9062        }
9063
9064        public int getCurrentOffset(HandleView handle) {
9065            return getSelectionStart();
9066        }
9067
9068        public boolean onTouchEvent(MotionEvent ev) {
9069            return false;
9070        }
9071
9072        public void onTouchModeChanged(boolean isInTouchMode) {
9073            if (!isInTouchMode) {
9074                hide();
9075            }
9076        }
9077
9078        private HandleView getHandle() {
9079            if (mHandle == null) {
9080                mHandle = new HandleView(this, HandleView.CENTER);
9081            }
9082            return mHandle;
9083        }
9084
9085        @Override
9086        public void onDetached() {
9087            removeHiderCallback();
9088            removePastePopupCallback();
9089        }
9090    }
9091
9092    private class SelectionModifierCursorController implements CursorController {
9093        // The cursor controller images, lazily created when shown.
9094        private HandleView mStartHandle, mEndHandle;
9095        // The offsets of that last touch down event. Remembered to start selection there.
9096        private int mMinTouchOffset, mMaxTouchOffset;
9097        // Whether selection anchors are active
9098        private boolean mIsShowing;
9099
9100        // Double tap detection
9101        private long mPreviousTapUpTime = 0;
9102        private int mPreviousTapPositionX;
9103        private int mPreviousTapPositionY;
9104
9105        SelectionModifierCursorController() {
9106            resetTouchOffsets();
9107        }
9108
9109        public void show() {
9110            if (isInBatchEditMode()) {
9111                return;
9112            }
9113
9114            // Lazy object creation has to be done before updatePosition() is called.
9115            if (mStartHandle == null) mStartHandle = new HandleView(this, HandleView.LEFT);
9116            if (mEndHandle == null) mEndHandle = new HandleView(this, HandleView.RIGHT);
9117
9118            mIsShowing = true;
9119            updatePosition();
9120
9121            mStartHandle.show();
9122            mEndHandle.show();
9123
9124            hideInsertionPointCursorController();
9125        }
9126
9127        public void hide() {
9128            if (mStartHandle != null) mStartHandle.hide();
9129            if (mEndHandle != null) mEndHandle.hide();
9130            mIsShowing = false;
9131        }
9132
9133        public boolean isShowing() {
9134            return mIsShowing;
9135        }
9136
9137        public void cancelFadeOutAnimation() {
9138            hide();
9139        }
9140
9141        public void updatePosition(HandleView handle, int x, int y) {
9142            int selectionStart = getSelectionStart();
9143            int selectionEnd = getSelectionEnd();
9144
9145            final int previousOffset = handle == mStartHandle ? selectionStart : selectionEnd;
9146            int offset = getHysteresisOffset(x, y, previousOffset);
9147
9148            // Handle the case where start and end are swapped, making sure start <= end
9149            if (handle == mStartHandle) {
9150                if (selectionStart == offset || offset > selectionEnd) {
9151                    return; // no change, no need to redraw;
9152                }
9153                // If the user "closes" the selection entirely they were probably trying to
9154                // select a single character. Help them out.
9155                if (offset == selectionEnd) {
9156                    offset = selectionEnd - 1;
9157                }
9158                selectionStart = offset;
9159            } else {
9160                if (selectionEnd == offset || offset < selectionStart) {
9161                    return; // no change, no need to redraw;
9162                }
9163                // If the user "closes" the selection entirely they were probably trying to
9164                // select a single character. Help them out.
9165                if (offset == selectionStart) {
9166                    offset = selectionStart + 1;
9167                }
9168                selectionEnd = offset;
9169            }
9170
9171            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9172            updatePosition();
9173        }
9174
9175        public void updateOffset(HandleView handle, int offset) {
9176            int start = getSelectionStart();
9177            int end = getSelectionEnd();
9178
9179            if (mStartHandle == handle) {
9180                start = offset;
9181            } else {
9182                end = offset;
9183            }
9184
9185            Selection.setSelection((Spannable) mText, start, end);
9186            updatePosition();
9187        }
9188
9189        public void updatePosition() {
9190            if (!isShowing()) {
9191                return;
9192            }
9193
9194            final int selectionStart = getSelectionStart();
9195            final int selectionEnd = getSelectionEnd();
9196
9197            if ((selectionStart < 0) || (selectionEnd < 0)) {
9198                // Should never happen, safety check.
9199                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
9200                hide();
9201                return;
9202            }
9203
9204            // The handles have been created since the controller isShowing().
9205            mStartHandle.positionAtCursor(selectionStart, true);
9206            mEndHandle.positionAtCursor(selectionEnd, true);
9207        }
9208
9209        public int getCurrentOffset(HandleView handle) {
9210            return mStartHandle == handle ? getSelectionStart() : getSelectionEnd();
9211        }
9212
9213        public boolean onTouchEvent(MotionEvent event) {
9214            // This is done even when the View does not have focus, so that long presses can start
9215            // selection and tap can move cursor from this tap position.
9216            if (isTextEditable() || mTextIsSelectable) {
9217                switch (event.getActionMasked()) {
9218                    case MotionEvent.ACTION_DOWN:
9219                        final int x = (int) event.getX();
9220                        final int y = (int) event.getY();
9221
9222                        // Remember finger down position, to be able to start selection from there
9223                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
9224
9225                        // Double tap detection
9226                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
9227                        if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
9228                                isPositionOnText(x, y)) {
9229                            final int deltaX = x - mPreviousTapPositionX;
9230                            final int deltaY = y - mPreviousTapPositionY;
9231                            final int distanceSquared = deltaX * deltaX + deltaY * deltaY;
9232                            if (distanceSquared < mSquaredTouchSlopDistance) {
9233                                startSelectionActionMode();
9234                                mDiscardNextActionUp = true;
9235                            }
9236                        }
9237
9238                        mPreviousTapPositionX = x;
9239                        mPreviousTapPositionY = y;
9240
9241                        break;
9242
9243                    case MotionEvent.ACTION_POINTER_DOWN:
9244                    case MotionEvent.ACTION_POINTER_UP:
9245                        // Handle multi-point gestures. Keep min and max offset positions.
9246                        // Only activated for devices that correctly handle multi-touch.
9247                        if (mContext.getPackageManager().hasSystemFeature(
9248                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
9249                            updateMinAndMaxOffsets(event);
9250                        }
9251                        break;
9252
9253                    case MotionEvent.ACTION_UP:
9254                        mPreviousTapUpTime = SystemClock.uptimeMillis();
9255                        break;
9256                }
9257            }
9258            return false;
9259        }
9260
9261        /**
9262         * @param event
9263         */
9264        private void updateMinAndMaxOffsets(MotionEvent event) {
9265            int pointerCount = event.getPointerCount();
9266            for (int index = 0; index < pointerCount; index++) {
9267                final int x = (int) event.getX(index);
9268                final int y = (int) event.getY(index);
9269                int offset = getOffset(x, y);
9270                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
9271                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
9272            }
9273        }
9274
9275        public int getMinTouchOffset() {
9276            return mMinTouchOffset;
9277        }
9278
9279        public int getMaxTouchOffset() {
9280            return mMaxTouchOffset;
9281        }
9282
9283        public void resetTouchOffsets() {
9284            mMinTouchOffset = mMaxTouchOffset = -1;
9285        }
9286
9287        /**
9288         * @return true iff this controller is currently used to move the selection start.
9289         */
9290        public boolean isSelectionStartDragged() {
9291            return mStartHandle != null && mStartHandle.isDragging();
9292        }
9293
9294        public void onTouchModeChanged(boolean isInTouchMode) {
9295            if (!isInTouchMode) {
9296                hide();
9297            }
9298        }
9299
9300        @Override
9301        public void onDetached() {}
9302    }
9303
9304    private void hideInsertionPointCursorController() {
9305        // No need to create the controller to hide it.
9306        if (mInsertionPointCursorController != null) {
9307            mInsertionPointCursorController.hide();
9308        }
9309    }
9310
9311    /**
9312     * Hides the insertion controller and stops text selection mode, hiding the selection controller
9313     */
9314    private void hideControllers() {
9315        hideInsertionPointCursorController();
9316        stopSelectionActionMode();
9317    }
9318
9319    /**
9320     * Get the offset character closest to the specified absolute position.
9321     *
9322     * @param x The horizontal absolute position of a point on screen
9323     * @param y The vertical absolute position of a point on screen
9324     * @return the character offset for the character whose position is closest to the specified
9325     *  position. Returns -1 if there is no layout.
9326     *
9327     * @hide
9328     */
9329    public int getOffset(int x, int y) {
9330        if (getLayout() == null) return -1;
9331        final int line = getLineAtCoordinate(y);
9332        final int offset = getOffsetAtCoordinate(line, x);
9333        return offset;
9334    }
9335
9336    int getHysteresisOffset(int x, int y, int previousOffset) {
9337        final Layout layout = getLayout();
9338        if (layout == null) return -1;
9339
9340        int line = getLineAtCoordinate(y);
9341        final int previousLine = layout.getLineForOffset(previousOffset);
9342        final int previousLineTop = layout.getLineTop(previousLine);
9343        final int previousLineBottom = layout.getLineBottom(previousLine);
9344        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 8;
9345
9346        // If new line is just before or after previous line and y position is less than
9347        // hysteresisThreshold away from previous line, keep cursor on previous line.
9348        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
9349            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
9350            line = previousLine;
9351        }
9352
9353        return getOffsetAtCoordinate(line, x);
9354    }
9355
9356    private int convertToLocalHorizontalCoordinate(int x) {
9357        x -= getTotalPaddingLeft();
9358        // Clamp the position to inside of the view.
9359        x = Math.max(0, x);
9360        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9361        x += getScrollX();
9362        return x;
9363    }
9364
9365    private int getLineAtCoordinate(int y) {
9366        y -= getTotalPaddingTop();
9367        // Clamp the position to inside of the view.
9368        y = Math.max(0, y);
9369        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9370        y += getScrollY();
9371        return getLayout().getLineForVertical(y);
9372    }
9373
9374    private int getOffsetAtCoordinate(int line, int x) {
9375        x = convertToLocalHorizontalCoordinate(x);
9376        return getLayout().getOffsetForHorizontal(line, x);
9377    }
9378
9379    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
9380     * in the view. Returns false when the position is in the empty space of left/right of text.
9381     */
9382    private boolean isPositionOnText(int x, int y) {
9383        if (getLayout() == null) return false;
9384
9385        final int line = getLineAtCoordinate(y);
9386        x = convertToLocalHorizontalCoordinate(x);
9387
9388        if (x < getLayout().getLineLeft(line)) return false;
9389        if (x > getLayout().getLineRight(line)) return false;
9390        return true;
9391    }
9392
9393    @Override
9394    public boolean onDragEvent(DragEvent event) {
9395        switch (event.getAction()) {
9396            case DragEvent.ACTION_DRAG_STARTED:
9397                return hasInsertionController();
9398
9399            case DragEvent.ACTION_DRAG_ENTERED:
9400                TextView.this.requestFocus();
9401                return true;
9402
9403            case DragEvent.ACTION_DRAG_LOCATION:
9404                final int offset = getOffset((int) event.getX(), (int) event.getY());
9405                Selection.setSelection((Spannable)mText, offset);
9406                return true;
9407
9408            case DragEvent.ACTION_DROP:
9409                onDrop(event);
9410                return true;
9411
9412            case DragEvent.ACTION_DRAG_ENDED:
9413            case DragEvent.ACTION_DRAG_EXITED:
9414            default:
9415                return true;
9416        }
9417    }
9418
9419    private void onDrop(DragEvent event) {
9420        StringBuilder content = new StringBuilder("");
9421        ClipData clipData = event.getClipData();
9422        final int itemCount = clipData.getItemCount();
9423        for (int i=0; i < itemCount; i++) {
9424            Item item = clipData.getItemAt(i);
9425            content.append(item.coerceToText(TextView.this.mContext));
9426        }
9427
9428        final int offset = getOffset((int) event.getX(), (int) event.getY());
9429
9430        Object localState = event.getLocalState();
9431        DragLocalState dragLocalState = null;
9432        if (localState instanceof DragLocalState) {
9433            dragLocalState = (DragLocalState) localState;
9434        }
9435        boolean dragDropIntoItself = dragLocalState != null &&
9436                dragLocalState.sourceTextView == this;
9437
9438        if (dragDropIntoItself) {
9439            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
9440                // A drop inside the original selection discards the drop.
9441                return;
9442            }
9443        }
9444
9445        final int originalLength = mText.length();
9446        long minMax = prepareSpacesAroundPaste(offset, offset, content);
9447        int min = extractRangeStartFromLong(minMax);
9448        int max = extractRangeEndFromLong(minMax);
9449
9450        Selection.setSelection((Spannable) mText, max);
9451        ((Editable) mText).replace(min, max, content);
9452
9453        if (dragDropIntoItself) {
9454            int dragSourceStart = dragLocalState.start;
9455            int dragSourceEnd = dragLocalState.end;
9456            if (max <= dragSourceStart) {
9457                // Inserting text before selection has shifted positions
9458                final int shift = mText.length() - originalLength;
9459                dragSourceStart += shift;
9460                dragSourceEnd += shift;
9461            }
9462
9463            // Delete original selection
9464            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
9465
9466            // Make sure we do not leave two adjacent spaces.
9467            if ((dragSourceStart == 0 ||
9468                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
9469                    (dragSourceStart == mText.length() ||
9470                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
9471                final int pos = dragSourceStart == mText.length() ?
9472                        dragSourceStart - 1 : dragSourceStart;
9473                ((Editable) mText).delete(pos, pos + 1);
9474            }
9475        }
9476    }
9477
9478    /**
9479     * @return True if this view supports insertion handles.
9480     */
9481    boolean hasInsertionController() {
9482        return mInsertionControllerEnabled;
9483    }
9484
9485    /**
9486     * @return True if this view supports selection handles.
9487     */
9488    boolean hasSelectionController() {
9489        return mSelectionControllerEnabled;
9490    }
9491
9492    InsertionPointCursorController getInsertionController() {
9493        if (!mInsertionControllerEnabled) {
9494            return null;
9495        }
9496
9497        if (mInsertionPointCursorController == null) {
9498            mInsertionPointCursorController = new InsertionPointCursorController();
9499
9500            final ViewTreeObserver observer = getViewTreeObserver();
9501            if (observer != null) {
9502                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
9503            }
9504        }
9505
9506        return mInsertionPointCursorController;
9507    }
9508
9509    SelectionModifierCursorController getSelectionController() {
9510        if (!mSelectionControllerEnabled) {
9511            return null;
9512        }
9513
9514        if (mSelectionModifierCursorController == null) {
9515            mSelectionModifierCursorController = new SelectionModifierCursorController();
9516
9517            final ViewTreeObserver observer = getViewTreeObserver();
9518            if (observer != null) {
9519                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
9520            }
9521        }
9522
9523        return mSelectionModifierCursorController;
9524    }
9525
9526    boolean isInBatchEditMode() {
9527        final InputMethodState ims = mInputMethodState;
9528        if (ims != null) {
9529            return ims.mBatchEditNesting > 0;
9530        }
9531        return mInBatchEditControllers;
9532    }
9533
9534    @ViewDebug.ExportedProperty(category = "text")
9535    private CharSequence            mText;
9536    private CharSequence            mTransformed;
9537    private BufferType              mBufferType = BufferType.NORMAL;
9538
9539    private int                     mInputType = EditorInfo.TYPE_NULL;
9540    private CharSequence            mHint;
9541    private Layout                  mHintLayout;
9542
9543    private KeyListener             mInput;
9544
9545    private MovementMethod          mMovement;
9546    private TransformationMethod    mTransformation;
9547    private ChangeWatcher           mChangeWatcher;
9548
9549    private ArrayList<TextWatcher>  mListeners = null;
9550
9551    // display attributes
9552    private final TextPaint         mTextPaint;
9553    private boolean                 mUserSetTextScaleX;
9554    private final Paint             mHighlightPaint;
9555    private int                     mHighlightColor = 0xCC475925;
9556    /**
9557     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
9558     * this field being protected. Will be restored as private when lineHeight
9559     * feature request 3215097 is implemented
9560     * @hide
9561     */
9562    protected Layout                mLayout;
9563
9564    private long                    mShowCursor;
9565    private Blink                   mBlink;
9566    private boolean                 mCursorVisible = true;
9567
9568    // Cursor Controllers.
9569    private InsertionPointCursorController mInsertionPointCursorController;
9570    private SelectionModifierCursorController mSelectionModifierCursorController;
9571    private ActionMode              mSelectionActionMode;
9572    private boolean                 mInsertionControllerEnabled;
9573    private boolean                 mSelectionControllerEnabled;
9574    private boolean                 mInBatchEditControllers;
9575
9576    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
9577    // select from the current cursor position. Otherwise, select from long pressed position.
9578    private boolean                 mDPadCenterIsDown = false;
9579    private boolean                 mEnterKeyIsDown = false;
9580    private boolean                 mContextMenuTriggeredByKey = false;
9581    // Created once and shared by different CursorController helper methods.
9582    // Only one cursor controller is active at any time which prevent race conditions.
9583    private static Rect             sCursorControllerTempRect = new Rect();
9584
9585    private boolean                 mSelectAllOnFocus = false;
9586
9587    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
9588    private boolean                 mHorizontallyScrolling;
9589
9590    private int                     mAutoLinkMask;
9591    private boolean                 mLinksClickable = true;
9592
9593    private float                   mSpacingMult = 1;
9594    private float                   mSpacingAdd = 0;
9595    private boolean                 mTextIsSelectable = false;
9596
9597    private static final int        LINES = 1;
9598    private static final int        EMS = LINES;
9599    private static final int        PIXELS = 2;
9600
9601    private int                     mMaximum = Integer.MAX_VALUE;
9602    private int                     mMaxMode = LINES;
9603    private int                     mMinimum = 0;
9604    private int                     mMinMode = LINES;
9605
9606    private int                     mMaxWidth = Integer.MAX_VALUE;
9607    private int                     mMaxWidthMode = PIXELS;
9608    private int                     mMinWidth = 0;
9609    private int                     mMinWidthMode = PIXELS;
9610
9611    private boolean                 mSingleLine;
9612    private int                     mDesiredHeightAtMeasure = -1;
9613    private boolean                 mIncludePad = true;
9614
9615    // tmp primitives, so we don't alloc them on each draw
9616    private Path                    mHighlightPath;
9617    private boolean                 mHighlightPathBogus = true;
9618    private static final RectF      sTempRect = new RectF();
9619
9620    // XXX should be much larger
9621    private static final int        VERY_WIDE = 16384;
9622
9623    private static final int        BLINK = 500;
9624
9625    private static final int ANIMATED_SCROLL_GAP = 250;
9626    private long mLastScroll;
9627    private Scroller mScroller = null;
9628
9629    private BoringLayout.Metrics mBoring;
9630    private BoringLayout.Metrics mHintBoring;
9631
9632    private BoringLayout mSavedLayout, mSavedHintLayout;
9633
9634    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
9635    private InputFilter[] mFilters = NO_FILTERS;
9636    private static final Spanned EMPTY_SPANNED = new SpannedString("");
9637    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
9638    // System wide time for last cut or copy action.
9639    private static long sLastCutOrCopyTime;
9640    // Used to highlight a word when it is corrected by the IME
9641    private CorrectionHighlighter mCorrectionHighlighter;
9642    // New state used to change background based on whether this TextView is multiline.
9643    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
9644}
9645