TextView.java revision ba04dbc6cd9ea2f504b76657c85e476a795e9b5b 
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.content.Context;
25import android.content.Intent;
26import android.content.pm.PackageManager;
27import android.content.res.ColorStateList;
28import android.content.res.Resources;
29import android.content.res.TypedArray;
30import android.content.res.XmlResourceParser;
31import android.graphics.Canvas;
32import android.graphics.Paint;
33import android.graphics.Path;
34import android.graphics.Rect;
35import android.graphics.RectF;
36import android.graphics.Typeface;
37import android.graphics.drawable.Drawable;
38import android.inputmethodservice.ExtractEditText;
39import android.os.Bundle;
40import android.os.Handler;
41import android.os.Message;
42import android.os.Parcel;
43import android.os.Parcelable;
44import android.os.ResultReceiver;
45import android.os.SystemClock;
46import android.text.BoringLayout;
47import android.text.ClipboardManager;
48import android.text.DynamicLayout;
49import android.text.Editable;
50import android.text.GetChars;
51import android.text.GraphicsOperations;
52import android.text.InputFilter;
53import android.text.InputType;
54import android.text.Layout;
55import android.text.ParcelableSpan;
56import android.text.Selection;
57import android.text.SpanWatcher;
58import android.text.Spannable;
59import android.text.SpannableString;
60import android.text.Spanned;
61import android.text.SpannedString;
62import android.text.StaticLayout;
63import android.text.TextPaint;
64import android.text.TextUtils;
65import android.text.TextWatcher;
66import android.text.method.DateKeyListener;
67import android.text.method.DateTimeKeyListener;
68import android.text.method.DialerKeyListener;
69import android.text.method.DigitsKeyListener;
70import android.text.method.KeyListener;
71import android.text.method.LinkMovementMethod;
72import android.text.method.MetaKeyKeyListener;
73import android.text.method.MovementMethod;
74import android.text.method.PasswordTransformationMethod;
75import android.text.method.SingleLineTransformationMethod;
76import android.text.method.TextKeyListener;
77import android.text.method.TimeKeyListener;
78import android.text.method.TransformationMethod;
79import android.text.style.ParagraphStyle;
80import android.text.style.URLSpan;
81import android.text.style.UpdateAppearance;
82import android.text.util.Linkify;
83import android.util.AttributeSet;
84import android.util.FloatMath;
85import android.util.Log;
86import android.util.TypedValue;
87import android.view.ContextMenu;
88import android.view.Gravity;
89import android.view.KeyEvent;
90import android.view.LayoutInflater;
91import android.view.MenuItem;
92import android.view.MotionEvent;
93import android.view.View;
94import android.view.ViewDebug;
95import android.view.ViewGroup.LayoutParams;
96import android.view.ViewParent;
97import android.view.ViewRoot;
98import android.view.ViewTreeObserver;
99import android.view.accessibility.AccessibilityEvent;
100import android.view.accessibility.AccessibilityManager;
101import android.view.animation.AnimationUtils;
102import android.view.inputmethod.BaseInputConnection;
103import android.view.inputmethod.CompletionInfo;
104import android.view.inputmethod.EditorInfo;
105import android.view.inputmethod.ExtractedText;
106import android.view.inputmethod.ExtractedTextRequest;
107import android.view.inputmethod.InputConnection;
108import android.view.inputmethod.InputMethodManager;
109import android.widget.RemoteViews.RemoteView;
110
111import java.io.IOException;
112import java.lang.ref.WeakReference;
113import java.util.ArrayList;
114
115/**
116 * Displays text to the user and optionally allows them to edit it.  A TextView
117 * is a complete text editor, however the basic class is configured to not
118 * allow editing; see {@link EditText} for a subclass that configures the text
119 * view for editing.
120 *
121 * <p>
122 * <b>XML attributes</b>
123 * <p>
124 * See {@link android.R.styleable#TextView TextView Attributes},
125 * {@link android.R.styleable#View View Attributes}
126 *
127 * @attr ref android.R.styleable#TextView_text
128 * @attr ref android.R.styleable#TextView_bufferType
129 * @attr ref android.R.styleable#TextView_hint
130 * @attr ref android.R.styleable#TextView_textColor
131 * @attr ref android.R.styleable#TextView_textColorHighlight
132 * @attr ref android.R.styleable#TextView_textColorHint
133 * @attr ref android.R.styleable#TextView_textAppearance
134 * @attr ref android.R.styleable#TextView_textColorLink
135 * @attr ref android.R.styleable#TextView_textSize
136 * @attr ref android.R.styleable#TextView_textScaleX
137 * @attr ref android.R.styleable#TextView_typeface
138 * @attr ref android.R.styleable#TextView_textStyle
139 * @attr ref android.R.styleable#TextView_cursorVisible
140 * @attr ref android.R.styleable#TextView_maxLines
141 * @attr ref android.R.styleable#TextView_maxHeight
142 * @attr ref android.R.styleable#TextView_lines
143 * @attr ref android.R.styleable#TextView_height
144 * @attr ref android.R.styleable#TextView_minLines
145 * @attr ref android.R.styleable#TextView_minHeight
146 * @attr ref android.R.styleable#TextView_maxEms
147 * @attr ref android.R.styleable#TextView_maxWidth
148 * @attr ref android.R.styleable#TextView_ems
149 * @attr ref android.R.styleable#TextView_width
150 * @attr ref android.R.styleable#TextView_minEms
151 * @attr ref android.R.styleable#TextView_minWidth
152 * @attr ref android.R.styleable#TextView_gravity
153 * @attr ref android.R.styleable#TextView_scrollHorizontally
154 * @attr ref android.R.styleable#TextView_password
155 * @attr ref android.R.styleable#TextView_singleLine
156 * @attr ref android.R.styleable#TextView_selectAllOnFocus
157 * @attr ref android.R.styleable#TextView_includeFontPadding
158 * @attr ref android.R.styleable#TextView_maxLength
159 * @attr ref android.R.styleable#TextView_shadowColor
160 * @attr ref android.R.styleable#TextView_shadowDx
161 * @attr ref android.R.styleable#TextView_shadowDy
162 * @attr ref android.R.styleable#TextView_shadowRadius
163 * @attr ref android.R.styleable#TextView_autoLink
164 * @attr ref android.R.styleable#TextView_linksClickable
165 * @attr ref android.R.styleable#TextView_numeric
166 * @attr ref android.R.styleable#TextView_digits
167 * @attr ref android.R.styleable#TextView_phoneNumber
168 * @attr ref android.R.styleable#TextView_inputMethod
169 * @attr ref android.R.styleable#TextView_capitalize
170 * @attr ref android.R.styleable#TextView_autoText
171 * @attr ref android.R.styleable#TextView_editable
172 * @attr ref android.R.styleable#TextView_freezesText
173 * @attr ref android.R.styleable#TextView_ellipsize
174 * @attr ref android.R.styleable#TextView_drawableTop
175 * @attr ref android.R.styleable#TextView_drawableBottom
176 * @attr ref android.R.styleable#TextView_drawableRight
177 * @attr ref android.R.styleable#TextView_drawableLeft
178 * @attr ref android.R.styleable#TextView_drawablePadding
179 * @attr ref android.R.styleable#TextView_lineSpacingExtra
180 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
181 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
182 * @attr ref android.R.styleable#TextView_inputType
183 * @attr ref android.R.styleable#TextView_imeOptions
184 * @attr ref android.R.styleable#TextView_privateImeOptions
185 * @attr ref android.R.styleable#TextView_imeActionLabel
186 * @attr ref android.R.styleable#TextView_imeActionId
187 * @attr ref android.R.styleable#TextView_editorExtras
188 */
189@RemoteView
190public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
191    static final String LOG_TAG = "TextView";
192    static final boolean DEBUG_EXTRACT = false;
193
194    private static int PRIORITY = 100;
195
196    final int[] mTempCoords = new int[2];
197    Rect mTempRect;
198
199    private ColorStateList mTextColor;
200    private int mCurTextColor;
201    private ColorStateList mHintTextColor;
202    private ColorStateList mLinkTextColor;
203    private int mCurHintTextColor;
204    private boolean mFreezesText;
205    private boolean mFrozenWithFocus;
206    private boolean mTemporaryDetach;
207    private boolean mDispatchTemporaryDetach;
208
209    private boolean mEatTouchRelease = false;
210    private boolean mScrolled = false;
211
212    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
213    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
214
215    private float mShadowRadius, mShadowDx, mShadowDy;
216
217    private static final int PREDRAW_NOT_REGISTERED = 0;
218    private static final int PREDRAW_PENDING = 1;
219    private static final int PREDRAW_DONE = 2;
220    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
221
222    private TextUtils.TruncateAt mEllipsize = null;
223
224    // Enum for the "typeface" XML parameter.
225    // TODO: How can we get this from the XML instead of hardcoding it here?
226    private static final int SANS = 1;
227    private static final int SERIF = 2;
228    private static final int MONOSPACE = 3;
229
230    // Bitfield for the "numeric" XML parameter.
231    // TODO: How can we get this from the XML instead of hardcoding it here?
232    private static final int SIGNED = 2;
233    private static final int DECIMAL = 4;
234
235    class Drawables {
236        final Rect mCompoundRect = new Rect();
237        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
238        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
239        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
240        int mDrawablePadding;
241    }
242    private Drawables mDrawables;
243
244    private CharSequence mError;
245    private boolean mErrorWasChanged;
246    private ErrorPopup mPopup;
247    /**
248     * This flag is set if the TextView tries to display an error before it
249     * is attached to the window (so its position is still unknown).
250     * It causes the error to be shown later, when onAttachedToWindow()
251     * is called.
252     */
253    private boolean mShowErrorAfterAttach;
254
255    private CharWrapper mCharWrapper = null;
256
257    private boolean mSelectionMoved = false;
258    private boolean mTouchFocusSelected = false;
259
260    private Marquee mMarquee;
261    private boolean mRestartMarquee;
262
263    private int mMarqueeRepeatLimit = 3;
264
265    class InputContentType {
266        int imeOptions = EditorInfo.IME_NULL;
267        String privateImeOptions;
268        CharSequence imeActionLabel;
269        int imeActionId;
270        Bundle extras;
271        OnEditorActionListener onEditorActionListener;
272        boolean enterDown;
273    }
274    InputContentType mInputContentType;
275
276    class InputMethodState {
277        Rect mCursorRectInWindow = new Rect();
278        RectF mTmpRectF = new RectF();
279        float[] mTmpOffset = new float[2];
280        ExtractedTextRequest mExtracting;
281        final ExtractedText mTmpExtracted = new ExtractedText();
282        int mBatchEditNesting;
283        boolean mCursorChanged;
284        boolean mSelectionModeChanged;
285        boolean mContentChanged;
286        int mChangedStart, mChangedEnd, mChangedDelta;
287    }
288    InputMethodState mInputMethodState;
289
290    private int mTextSelectHandleLeftRes;
291    private int mTextSelectHandleRightRes;
292    private int mTextSelectHandleRes;
293
294    /*
295     * Kick-start the font cache for the zygote process (to pay the cost of
296     * initializing freetype for our default font only once).
297     */
298    static {
299        Paint p = new Paint();
300        p.setAntiAlias(true);
301        // We don't care about the result, just the side-effect of measuring.
302        p.measureText("H");
303    }
304
305    /**
306     * Interface definition for a callback to be invoked when an action is
307     * performed on the editor.
308     */
309    public interface OnEditorActionListener {
310        /**
311         * Called when an action is being performed.
312         *
313         * @param v The view that was clicked.
314         * @param actionId Identifier of the action.  This will be either the
315         * identifier you supplied, or {@link EditorInfo#IME_NULL
316         * EditorInfo.IME_NULL} if being called due to the enter key
317         * being pressed.
318         * @param event If triggered by an enter key, this is the event;
319         * otherwise, this is null.
320         * @return Return true if you have consumed the action, else false.
321         */
322        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
323    }
324
325    public TextView(Context context) {
326        this(context, null);
327    }
328
329    public TextView(Context context,
330                    AttributeSet attrs) {
331        this(context, attrs, com.android.internal.R.attr.textViewStyle);
332    }
333
334    @SuppressWarnings("deprecation")
335    public TextView(Context context,
336                    AttributeSet attrs,
337                    int defStyle) {
338        super(context, attrs, defStyle);
339        mText = "";
340
341        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
342        mTextPaint.density = getResources().getDisplayMetrics().density;
343        mTextPaint.setCompatibilityScaling(
344                getResources().getCompatibilityInfo().applicationScale);
345
346        // If we get the paint from the skin, we should set it to left, since
347        // the layout always wants it to be left.
348        // mTextPaint.setTextAlign(Paint.Align.LEFT);
349
350        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
351        mHighlightPaint.setCompatibilityScaling(
352                getResources().getCompatibilityInfo().applicationScale);
353
354        mMovement = getDefaultMovementMethod();
355        mTransformation = null;
356
357        TypedArray a =
358            context.obtainStyledAttributes(
359                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
360
361        int textColorHighlight = 0;
362        ColorStateList textColor = null;
363        ColorStateList textColorHint = null;
364        ColorStateList textColorLink = null;
365        int textSize = 15;
366        int typefaceIndex = -1;
367        int styleIndex = -1;
368
369        /*
370         * Look the appearance up without checking first if it exists because
371         * almost every TextView has one and it greatly simplifies the logic
372         * to be able to parse the appearance first and then let specific tags
373         * for this View override it.
374         */
375        TypedArray appearance = null;
376        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
377        if (ap != -1) {
378            appearance = context.obtainStyledAttributes(ap,
379                                com.android.internal.R.styleable.
380                                TextAppearance);
381        }
382        if (appearance != null) {
383            int n = appearance.getIndexCount();
384            for (int i = 0; i < n; i++) {
385                int attr = appearance.getIndex(i);
386
387                switch (attr) {
388                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
389                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
390                    break;
391
392                case com.android.internal.R.styleable.TextAppearance_textColor:
393                    textColor = appearance.getColorStateList(attr);
394                    break;
395
396                case com.android.internal.R.styleable.TextAppearance_textColorHint:
397                    textColorHint = appearance.getColorStateList(attr);
398                    break;
399
400                case com.android.internal.R.styleable.TextAppearance_textColorLink:
401                    textColorLink = appearance.getColorStateList(attr);
402                    break;
403
404                case com.android.internal.R.styleable.TextAppearance_textSize:
405                    textSize = appearance.getDimensionPixelSize(attr, textSize);
406                    break;
407
408                case com.android.internal.R.styleable.TextAppearance_typeface:
409                    typefaceIndex = appearance.getInt(attr, -1);
410                    break;
411
412                case com.android.internal.R.styleable.TextAppearance_textStyle:
413                    styleIndex = appearance.getInt(attr, -1);
414                    break;
415                }
416            }
417
418            appearance.recycle();
419        }
420
421        boolean editable = getDefaultEditable();
422        CharSequence inputMethod = null;
423        int numeric = 0;
424        CharSequence digits = null;
425        boolean phone = false;
426        boolean autotext = false;
427        int autocap = -1;
428        int buffertype = 0;
429        boolean selectallonfocus = false;
430        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
431            drawableBottom = null;
432        int drawablePadding = 0;
433        int ellipsize = -1;
434        boolean singleLine = false;
435        int maxlength = -1;
436        CharSequence text = "";
437        CharSequence hint = null;
438        int shadowcolor = 0;
439        float dx = 0, dy = 0, r = 0;
440        boolean password = false;
441        int inputType = EditorInfo.TYPE_NULL;
442
443        int n = a.getIndexCount();
444        for (int i = 0; i < n; i++) {
445            int attr = a.getIndex(i);
446
447            switch (attr) {
448            case com.android.internal.R.styleable.TextView_editable:
449                editable = a.getBoolean(attr, editable);
450                break;
451
452            case com.android.internal.R.styleable.TextView_inputMethod:
453                inputMethod = a.getText(attr);
454                break;
455
456            case com.android.internal.R.styleable.TextView_numeric:
457                numeric = a.getInt(attr, numeric);
458                break;
459
460            case com.android.internal.R.styleable.TextView_digits:
461                digits = a.getText(attr);
462                break;
463
464            case com.android.internal.R.styleable.TextView_phoneNumber:
465                phone = a.getBoolean(attr, phone);
466                break;
467
468            case com.android.internal.R.styleable.TextView_autoText:
469                autotext = a.getBoolean(attr, autotext);
470                break;
471
472            case com.android.internal.R.styleable.TextView_capitalize:
473                autocap = a.getInt(attr, autocap);
474                break;
475
476            case com.android.internal.R.styleable.TextView_bufferType:
477                buffertype = a.getInt(attr, buffertype);
478                break;
479
480            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
481                selectallonfocus = a.getBoolean(attr, selectallonfocus);
482                break;
483
484            case com.android.internal.R.styleable.TextView_autoLink:
485                mAutoLinkMask = a.getInt(attr, 0);
486                break;
487
488            case com.android.internal.R.styleable.TextView_linksClickable:
489                mLinksClickable = a.getBoolean(attr, true);
490                break;
491
492            case com.android.internal.R.styleable.TextView_drawableLeft:
493                drawableLeft = a.getDrawable(attr);
494                break;
495
496            case com.android.internal.R.styleable.TextView_drawableTop:
497                drawableTop = a.getDrawable(attr);
498                break;
499
500            case com.android.internal.R.styleable.TextView_drawableRight:
501                drawableRight = a.getDrawable(attr);
502                break;
503
504            case com.android.internal.R.styleable.TextView_drawableBottom:
505                drawableBottom = a.getDrawable(attr);
506                break;
507
508            case com.android.internal.R.styleable.TextView_drawablePadding:
509                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
510                break;
511
512            case com.android.internal.R.styleable.TextView_maxLines:
513                setMaxLines(a.getInt(attr, -1));
514                break;
515
516            case com.android.internal.R.styleable.TextView_maxHeight:
517                setMaxHeight(a.getDimensionPixelSize(attr, -1));
518                break;
519
520            case com.android.internal.R.styleable.TextView_lines:
521                setLines(a.getInt(attr, -1));
522                break;
523
524            case com.android.internal.R.styleable.TextView_height:
525                setHeight(a.getDimensionPixelSize(attr, -1));
526                break;
527
528            case com.android.internal.R.styleable.TextView_minLines:
529                setMinLines(a.getInt(attr, -1));
530                break;
531
532            case com.android.internal.R.styleable.TextView_minHeight:
533                setMinHeight(a.getDimensionPixelSize(attr, -1));
534                break;
535
536            case com.android.internal.R.styleable.TextView_maxEms:
537                setMaxEms(a.getInt(attr, -1));
538                break;
539
540            case com.android.internal.R.styleable.TextView_maxWidth:
541                setMaxWidth(a.getDimensionPixelSize(attr, -1));
542                break;
543
544            case com.android.internal.R.styleable.TextView_ems:
545                setEms(a.getInt(attr, -1));
546                break;
547
548            case com.android.internal.R.styleable.TextView_width:
549                setWidth(a.getDimensionPixelSize(attr, -1));
550                break;
551
552            case com.android.internal.R.styleable.TextView_minEms:
553                setMinEms(a.getInt(attr, -1));
554                break;
555
556            case com.android.internal.R.styleable.TextView_minWidth:
557                setMinWidth(a.getDimensionPixelSize(attr, -1));
558                break;
559
560            case com.android.internal.R.styleable.TextView_gravity:
561                setGravity(a.getInt(attr, -1));
562                break;
563
564            case com.android.internal.R.styleable.TextView_hint:
565                hint = a.getText(attr);
566                break;
567
568            case com.android.internal.R.styleable.TextView_text:
569                text = a.getText(attr);
570                break;
571
572            case com.android.internal.R.styleable.TextView_scrollHorizontally:
573                if (a.getBoolean(attr, false)) {
574                    setHorizontallyScrolling(true);
575                }
576                break;
577
578            case com.android.internal.R.styleable.TextView_singleLine:
579                singleLine = a.getBoolean(attr, singleLine);
580                break;
581
582            case com.android.internal.R.styleable.TextView_ellipsize:
583                ellipsize = a.getInt(attr, ellipsize);
584                break;
585
586            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
587                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
588                break;
589
590            case com.android.internal.R.styleable.TextView_includeFontPadding:
591                if (!a.getBoolean(attr, true)) {
592                    setIncludeFontPadding(false);
593                }
594                break;
595
596            case com.android.internal.R.styleable.TextView_cursorVisible:
597                if (!a.getBoolean(attr, true)) {
598                    setCursorVisible(false);
599                }
600                break;
601
602            case com.android.internal.R.styleable.TextView_maxLength:
603                maxlength = a.getInt(attr, -1);
604                break;
605
606            case com.android.internal.R.styleable.TextView_textScaleX:
607                setTextScaleX(a.getFloat(attr, 1.0f));
608                break;
609
610            case com.android.internal.R.styleable.TextView_freezesText:
611                mFreezesText = a.getBoolean(attr, false);
612                break;
613
614            case com.android.internal.R.styleable.TextView_shadowColor:
615                shadowcolor = a.getInt(attr, 0);
616                break;
617
618            case com.android.internal.R.styleable.TextView_shadowDx:
619                dx = a.getFloat(attr, 0);
620                break;
621
622            case com.android.internal.R.styleable.TextView_shadowDy:
623                dy = a.getFloat(attr, 0);
624                break;
625
626            case com.android.internal.R.styleable.TextView_shadowRadius:
627                r = a.getFloat(attr, 0);
628                break;
629
630            case com.android.internal.R.styleable.TextView_enabled:
631                setEnabled(a.getBoolean(attr, isEnabled()));
632                break;
633
634            case com.android.internal.R.styleable.TextView_textColorHighlight:
635                textColorHighlight = a.getColor(attr, textColorHighlight);
636                break;
637
638            case com.android.internal.R.styleable.TextView_textColor:
639                textColor = a.getColorStateList(attr);
640                break;
641
642            case com.android.internal.R.styleable.TextView_textColorHint:
643                textColorHint = a.getColorStateList(attr);
644                break;
645
646            case com.android.internal.R.styleable.TextView_textColorLink:
647                textColorLink = a.getColorStateList(attr);
648                break;
649
650            case com.android.internal.R.styleable.TextView_textSize:
651                textSize = a.getDimensionPixelSize(attr, textSize);
652                break;
653
654            case com.android.internal.R.styleable.TextView_typeface:
655                typefaceIndex = a.getInt(attr, typefaceIndex);
656                break;
657
658            case com.android.internal.R.styleable.TextView_textStyle:
659                styleIndex = a.getInt(attr, styleIndex);
660                break;
661
662            case com.android.internal.R.styleable.TextView_password:
663                password = a.getBoolean(attr, password);
664                break;
665
666            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
667                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
668                break;
669
670            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
671                mSpacingMult = a.getFloat(attr, mSpacingMult);
672                break;
673
674            case com.android.internal.R.styleable.TextView_inputType:
675                inputType = a.getInt(attr, mInputType);
676                break;
677
678            case com.android.internal.R.styleable.TextView_imeOptions:
679                if (mInputContentType == null) {
680                    mInputContentType = new InputContentType();
681                }
682                mInputContentType.imeOptions = a.getInt(attr,
683                        mInputContentType.imeOptions);
684                break;
685
686            case com.android.internal.R.styleable.TextView_imeActionLabel:
687                if (mInputContentType == null) {
688                    mInputContentType = new InputContentType();
689                }
690                mInputContentType.imeActionLabel = a.getText(attr);
691                break;
692
693            case com.android.internal.R.styleable.TextView_imeActionId:
694                if (mInputContentType == null) {
695                    mInputContentType = new InputContentType();
696                }
697                mInputContentType.imeActionId = a.getInt(attr,
698                        mInputContentType.imeActionId);
699                break;
700
701            case com.android.internal.R.styleable.TextView_privateImeOptions:
702                setPrivateImeOptions(a.getString(attr));
703                break;
704
705            case com.android.internal.R.styleable.TextView_editorExtras:
706                try {
707                    setInputExtras(a.getResourceId(attr, 0));
708                } catch (XmlPullParserException e) {
709                    Log.w(LOG_TAG, "Failure reading input extras", e);
710                } catch (IOException e) {
711                    Log.w(LOG_TAG, "Failure reading input extras", e);
712                }
713                break;
714
715            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
716                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
717                break;
718
719            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
720                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
721                break;
722
723            case com.android.internal.R.styleable.TextView_textSelectHandle:
724                mTextSelectHandleRes = a.getResourceId(attr, 0);
725                break;
726            }
727        }
728        a.recycle();
729
730        BufferType bufferType = BufferType.EDITABLE;
731
732        if ((inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
733                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
734            password = true;
735        }
736
737        if (inputMethod != null) {
738            Class<?> c;
739
740            try {
741                c = Class.forName(inputMethod.toString());
742            } catch (ClassNotFoundException ex) {
743                throw new RuntimeException(ex);
744            }
745
746            try {
747                mInput = (KeyListener) c.newInstance();
748            } catch (InstantiationException ex) {
749                throw new RuntimeException(ex);
750            } catch (IllegalAccessException ex) {
751                throw new RuntimeException(ex);
752            }
753            try {
754                mInputType = inputType != EditorInfo.TYPE_NULL
755                        ? inputType
756                        : mInput.getInputType();
757            } catch (IncompatibleClassChangeError e) {
758                mInputType = EditorInfo.TYPE_CLASS_TEXT;
759            }
760        } else if (digits != null) {
761            mInput = DigitsKeyListener.getInstance(digits.toString());
762            // If no input type was specified, we will default to generic
763            // text, since we can't tell the IME about the set of digits
764            // that was selected.
765            mInputType = inputType != EditorInfo.TYPE_NULL
766                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
767        } else if (inputType != EditorInfo.TYPE_NULL) {
768            setInputType(inputType, true);
769            singleLine = (inputType&(EditorInfo.TYPE_MASK_CLASS
770                            | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) !=
771                    (EditorInfo.TYPE_CLASS_TEXT
772                            | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
773        } else if (phone) {
774            mInput = DialerKeyListener.getInstance();
775            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
776        } else if (numeric != 0) {
777            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
778                                                   (numeric & DECIMAL) != 0);
779            inputType = EditorInfo.TYPE_CLASS_NUMBER;
780            if ((numeric & SIGNED) != 0) {
781                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
782            }
783            if ((numeric & DECIMAL) != 0) {
784                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
785            }
786            mInputType = inputType;
787        } else if (autotext || autocap != -1) {
788            TextKeyListener.Capitalize cap;
789
790            inputType = EditorInfo.TYPE_CLASS_TEXT;
791            if (!singleLine) {
792                inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
793            }
794
795            switch (autocap) {
796            case 1:
797                cap = TextKeyListener.Capitalize.SENTENCES;
798                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
799                break;
800
801            case 2:
802                cap = TextKeyListener.Capitalize.WORDS;
803                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
804                break;
805
806            case 3:
807                cap = TextKeyListener.Capitalize.CHARACTERS;
808                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
809                break;
810
811            default:
812                cap = TextKeyListener.Capitalize.NONE;
813                break;
814            }
815
816            mInput = TextKeyListener.getInstance(autotext, cap);
817            mInputType = inputType;
818        } else if (editable) {
819            mInput = TextKeyListener.getInstance();
820            mInputType = EditorInfo.TYPE_CLASS_TEXT;
821            if (!singleLine) {
822                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
823            }
824        } else {
825            mInput = null;
826
827            switch (buffertype) {
828                case 0:
829                    bufferType = BufferType.NORMAL;
830                    break;
831                case 1:
832                    bufferType = BufferType.SPANNABLE;
833                    break;
834                case 2:
835                    bufferType = BufferType.EDITABLE;
836                    break;
837            }
838        }
839
840        if (password && (mInputType&EditorInfo.TYPE_MASK_CLASS)
841                == EditorInfo.TYPE_CLASS_TEXT) {
842            mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
843                | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
844        }
845
846        if (selectallonfocus) {
847            mSelectAllOnFocus = true;
848
849            if (bufferType == BufferType.NORMAL)
850                bufferType = BufferType.SPANNABLE;
851        }
852
853        setCompoundDrawablesWithIntrinsicBounds(
854            drawableLeft, drawableTop, drawableRight, drawableBottom);
855        setCompoundDrawablePadding(drawablePadding);
856
857        if (singleLine) {
858            setSingleLine();
859
860            if (mInput == null && ellipsize < 0) {
861                ellipsize = 3; // END
862            }
863        }
864
865        switch (ellipsize) {
866            case 1:
867                setEllipsize(TextUtils.TruncateAt.START);
868                break;
869            case 2:
870                setEllipsize(TextUtils.TruncateAt.MIDDLE);
871                break;
872            case 3:
873                setEllipsize(TextUtils.TruncateAt.END);
874                break;
875            case 4:
876                setHorizontalFadingEdgeEnabled(true);
877                setEllipsize(TextUtils.TruncateAt.MARQUEE);
878                break;
879        }
880
881        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
882        setHintTextColor(textColorHint);
883        setLinkTextColor(textColorLink);
884        if (textColorHighlight != 0) {
885            setHighlightColor(textColorHighlight);
886        }
887        setRawTextSize(textSize);
888
889        if (password) {
890            setTransformationMethod(PasswordTransformationMethod.getInstance());
891            typefaceIndex = MONOSPACE;
892        } else if ((mInputType&(EditorInfo.TYPE_MASK_CLASS
893                |EditorInfo.TYPE_MASK_VARIATION))
894                == (EditorInfo.TYPE_CLASS_TEXT
895                        |EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
896            typefaceIndex = MONOSPACE;
897        }
898
899        setTypefaceByIndex(typefaceIndex, styleIndex);
900
901        if (shadowcolor != 0) {
902            setShadowLayer(r, dx, dy, shadowcolor);
903        }
904
905        if (maxlength >= 0) {
906            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
907        } else {
908            setFilters(NO_FILTERS);
909        }
910
911        setText(text, bufferType);
912        if (hint != null) setHint(hint);
913
914        /*
915         * Views are not normally focusable unless specified to be.
916         * However, TextViews that have input or movement methods *are*
917         * focusable by default.
918         */
919        a = context.obtainStyledAttributes(attrs,
920                                           com.android.internal.R.styleable.View,
921                                           defStyle, 0);
922
923        boolean focusable = mMovement != null || mInput != null;
924        boolean clickable = focusable;
925        boolean longClickable = focusable;
926
927        n = a.getIndexCount();
928        for (int i = 0; i < n; i++) {
929            int attr = a.getIndex(i);
930
931            switch (attr) {
932            case com.android.internal.R.styleable.View_focusable:
933                focusable = a.getBoolean(attr, focusable);
934                break;
935
936            case com.android.internal.R.styleable.View_clickable:
937                clickable = a.getBoolean(attr, clickable);
938                break;
939
940            case com.android.internal.R.styleable.View_longClickable:
941                longClickable = a.getBoolean(attr, longClickable);
942                break;
943            }
944        }
945        a.recycle();
946
947        setFocusable(focusable);
948        setClickable(clickable);
949        setLongClickable(longClickable);
950
951        prepareCursorControllers();
952    }
953
954    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
955        Typeface tf = null;
956        switch (typefaceIndex) {
957            case SANS:
958                tf = Typeface.SANS_SERIF;
959                break;
960
961            case SERIF:
962                tf = Typeface.SERIF;
963                break;
964
965            case MONOSPACE:
966                tf = Typeface.MONOSPACE;
967                break;
968        }
969
970        setTypeface(tf, styleIndex);
971    }
972
973    /**
974     * Sets the typeface and style in which the text should be displayed,
975     * and turns on the fake bold and italic bits in the Paint if the
976     * Typeface that you provided does not have all the bits in the
977     * style that you specified.
978     *
979     * @attr ref android.R.styleable#TextView_typeface
980     * @attr ref android.R.styleable#TextView_textStyle
981     */
982    public void setTypeface(Typeface tf, int style) {
983        if (style > 0) {
984            if (tf == null) {
985                tf = Typeface.defaultFromStyle(style);
986            } else {
987                tf = Typeface.create(tf, style);
988            }
989
990            setTypeface(tf);
991            // now compute what (if any) algorithmic styling is needed
992            int typefaceStyle = tf != null ? tf.getStyle() : 0;
993            int need = style & ~typefaceStyle;
994            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
995            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
996        } else {
997            mTextPaint.setFakeBoldText(false);
998            mTextPaint.setTextSkewX(0);
999            setTypeface(tf);
1000        }
1001    }
1002
1003    /**
1004     * Subclasses override this to specify that they have a KeyListener
1005     * by default even if not specifically called for in the XML options.
1006     */
1007    protected boolean getDefaultEditable() {
1008        return false;
1009    }
1010
1011    /**
1012     * Subclasses override this to specify a default movement method.
1013     */
1014    protected MovementMethod getDefaultMovementMethod() {
1015        return null;
1016    }
1017
1018    /**
1019     * Return the text the TextView is displaying. If setText() was called with
1020     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1021     * the return value from this method to Spannable or Editable, respectively.
1022     *
1023     * Note: The content of the return value should not be modified. If you want
1024     * a modifiable one, you should make your own copy first.
1025     */
1026    @ViewDebug.CapturedViewProperty
1027    public CharSequence getText() {
1028        return mText;
1029    }
1030
1031    /**
1032     * Returns the length, in characters, of the text managed by this TextView
1033     */
1034    public int length() {
1035        return mText.length();
1036    }
1037
1038    /**
1039     * Return the text the TextView is displaying as an Editable object.  If
1040     * the text is not editable, null is returned.
1041     *
1042     * @see #getText
1043     */
1044    public Editable getEditableText() {
1045        return (mText instanceof Editable) ? (Editable)mText : null;
1046    }
1047
1048    /**
1049     * @return the height of one standard line in pixels.  Note that markup
1050     * within the text can cause individual lines to be taller or shorter
1051     * than this height, and the layout may contain additional first-
1052     * or last-line padding.
1053     */
1054    public int getLineHeight() {
1055        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult
1056                          + mSpacingAdd);
1057    }
1058
1059    /**
1060     * @return the Layout that is currently being used to display the text.
1061     * This can be null if the text or width has recently changes.
1062     */
1063    public final Layout getLayout() {
1064        return mLayout;
1065    }
1066
1067    /**
1068     * @return the current key listener for this TextView.
1069     * This will frequently be null for non-EditText TextViews.
1070     */
1071    public final KeyListener getKeyListener() {
1072        return mInput;
1073    }
1074
1075    /**
1076     * Sets the key listener to be used with this TextView.  This can be null
1077     * to disallow user input.  Note that this method has significant and
1078     * subtle interactions with soft keyboards and other input method:
1079     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1080     * for important details.  Calling this method will replace the current
1081     * content type of the text view with the content type returned by the
1082     * key listener.
1083     * <p>
1084     * Be warned that if you want a TextView with a key listener or movement
1085     * method not to be focusable, or if you want a TextView without a
1086     * key listener or movement method to be focusable, you must call
1087     * {@link #setFocusable} again after calling this to get the focusability
1088     * back the way you want it.
1089     *
1090     * @attr ref android.R.styleable#TextView_numeric
1091     * @attr ref android.R.styleable#TextView_digits
1092     * @attr ref android.R.styleable#TextView_phoneNumber
1093     * @attr ref android.R.styleable#TextView_inputMethod
1094     * @attr ref android.R.styleable#TextView_capitalize
1095     * @attr ref android.R.styleable#TextView_autoText
1096     */
1097    public void setKeyListener(KeyListener input) {
1098        setKeyListenerOnly(input);
1099        fixFocusableAndClickableSettings();
1100
1101        if (input != null) {
1102            try {
1103                mInputType = mInput.getInputType();
1104            } catch (IncompatibleClassChangeError e) {
1105                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1106            }
1107            if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
1108                    == EditorInfo.TYPE_CLASS_TEXT) {
1109                if (mSingleLine) {
1110                    mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
1111                } else {
1112                    mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
1113                }
1114            }
1115        } else {
1116            mInputType = EditorInfo.TYPE_NULL;
1117        }
1118
1119        InputMethodManager imm = InputMethodManager.peekInstance();
1120        if (imm != null) imm.restartInput(this);
1121    }
1122
1123    private void setKeyListenerOnly(KeyListener input) {
1124        mInput = input;
1125        if (mInput != null && !(mText instanceof Editable))
1126            setText(mText);
1127
1128        setFilters((Editable) mText, mFilters);
1129    }
1130
1131    /**
1132     * @return the movement method being used for this TextView.
1133     * This will frequently be null for non-EditText TextViews.
1134     */
1135    public final MovementMethod getMovementMethod() {
1136        return mMovement;
1137    }
1138
1139    /**
1140     * Sets the movement method (arrow key handler) to be used for
1141     * this TextView.  This can be null to disallow using the arrow keys
1142     * to move the cursor or scroll the view.
1143     * <p>
1144     * Be warned that if you want a TextView with a key listener or movement
1145     * method not to be focusable, or if you want a TextView without a
1146     * key listener or movement method to be focusable, you must call
1147     * {@link #setFocusable} again after calling this to get the focusability
1148     * back the way you want it.
1149     */
1150    public final void setMovementMethod(MovementMethod movement) {
1151        mMovement = movement;
1152
1153        if (mMovement != null && !(mText instanceof Spannable))
1154            setText(mText);
1155
1156        fixFocusableAndClickableSettings();
1157
1158        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1159        prepareCursorControllers();
1160    }
1161
1162    private void fixFocusableAndClickableSettings() {
1163        if ((mMovement != null) || mInput != null) {
1164            setFocusable(true);
1165            setClickable(true);
1166            setLongClickable(true);
1167        } else {
1168            setFocusable(false);
1169            setClickable(false);
1170            setLongClickable(false);
1171        }
1172    }
1173
1174    /**
1175     * @return the current transformation method for this TextView.
1176     * This will frequently be null except for single-line and password
1177     * fields.
1178     */
1179    public final TransformationMethod getTransformationMethod() {
1180        return mTransformation;
1181    }
1182
1183    /**
1184     * Sets the transformation that is applied to the text that this
1185     * TextView is displaying.
1186     *
1187     * @attr ref android.R.styleable#TextView_password
1188     * @attr ref android.R.styleable#TextView_singleLine
1189     */
1190    public final void setTransformationMethod(TransformationMethod method) {
1191        if (method == mTransformation) {
1192            // Avoid the setText() below if the transformation is
1193            // the same.
1194            return;
1195        }
1196        if (mTransformation != null) {
1197            if (mText instanceof Spannable) {
1198                ((Spannable) mText).removeSpan(mTransformation);
1199            }
1200        }
1201
1202        mTransformation = method;
1203
1204        setText(mText);
1205    }
1206
1207    /**
1208     * Returns the top padding of the view, plus space for the top
1209     * Drawable if any.
1210     */
1211    public int getCompoundPaddingTop() {
1212        final Drawables dr = mDrawables;
1213        if (dr == null || dr.mDrawableTop == null) {
1214            return mPaddingTop;
1215        } else {
1216            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1217        }
1218    }
1219
1220    /**
1221     * Returns the bottom padding of the view, plus space for the bottom
1222     * Drawable if any.
1223     */
1224    public int getCompoundPaddingBottom() {
1225        final Drawables dr = mDrawables;
1226        if (dr == null || dr.mDrawableBottom == null) {
1227            return mPaddingBottom;
1228        } else {
1229            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1230        }
1231    }
1232
1233    /**
1234     * Returns the left padding of the view, plus space for the left
1235     * Drawable if any.
1236     */
1237    public int getCompoundPaddingLeft() {
1238        final Drawables dr = mDrawables;
1239        if (dr == null || dr.mDrawableLeft == null) {
1240            return mPaddingLeft;
1241        } else {
1242            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1243        }
1244    }
1245
1246    /**
1247     * Returns the right padding of the view, plus space for the right
1248     * Drawable if any.
1249     */
1250    public int getCompoundPaddingRight() {
1251        final Drawables dr = mDrawables;
1252        if (dr == null || dr.mDrawableRight == null) {
1253            return mPaddingRight;
1254        } else {
1255            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1256        }
1257    }
1258
1259    /**
1260     * Returns the extended top padding of the view, including both the
1261     * top Drawable if any and any extra space to keep more than maxLines
1262     * of text from showing.  It is only valid to call this after measuring.
1263     */
1264    public int getExtendedPaddingTop() {
1265        if (mMaxMode != LINES) {
1266            return getCompoundPaddingTop();
1267        }
1268
1269        if (mLayout.getLineCount() <= mMaximum) {
1270            return getCompoundPaddingTop();
1271        }
1272
1273        int top = getCompoundPaddingTop();
1274        int bottom = getCompoundPaddingBottom();
1275        int viewht = getHeight() - top - bottom;
1276        int layoutht = mLayout.getLineTop(mMaximum);
1277
1278        if (layoutht >= viewht) {
1279            return top;
1280        }
1281
1282        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1283        if (gravity == Gravity.TOP) {
1284            return top;
1285        } else if (gravity == Gravity.BOTTOM) {
1286            return top + viewht - layoutht;
1287        } else { // (gravity == Gravity.CENTER_VERTICAL)
1288            return top + (viewht - layoutht) / 2;
1289        }
1290    }
1291
1292    /**
1293     * Returns the extended bottom padding of the view, including both the
1294     * bottom Drawable if any and any extra space to keep more than maxLines
1295     * of text from showing.  It is only valid to call this after measuring.
1296     */
1297    public int getExtendedPaddingBottom() {
1298        if (mMaxMode != LINES) {
1299            return getCompoundPaddingBottom();
1300        }
1301
1302        if (mLayout.getLineCount() <= mMaximum) {
1303            return getCompoundPaddingBottom();
1304        }
1305
1306        int top = getCompoundPaddingTop();
1307        int bottom = getCompoundPaddingBottom();
1308        int viewht = getHeight() - top - bottom;
1309        int layoutht = mLayout.getLineTop(mMaximum);
1310
1311        if (layoutht >= viewht) {
1312            return bottom;
1313        }
1314
1315        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1316        if (gravity == Gravity.TOP) {
1317            return bottom + viewht - layoutht;
1318        } else if (gravity == Gravity.BOTTOM) {
1319            return bottom;
1320        } else { // (gravity == Gravity.CENTER_VERTICAL)
1321            return bottom + (viewht - layoutht) / 2;
1322        }
1323    }
1324
1325    /**
1326     * Returns the total left padding of the view, including the left
1327     * Drawable if any.
1328     */
1329    public int getTotalPaddingLeft() {
1330        return getCompoundPaddingLeft();
1331    }
1332
1333    /**
1334     * Returns the total right padding of the view, including the right
1335     * Drawable if any.
1336     */
1337    public int getTotalPaddingRight() {
1338        return getCompoundPaddingRight();
1339    }
1340
1341    /**
1342     * Returns the total top padding of the view, including the top
1343     * Drawable if any, the extra space to keep more than maxLines
1344     * from showing, and the vertical offset for gravity, if any.
1345     */
1346    public int getTotalPaddingTop() {
1347        return getExtendedPaddingTop() + getVerticalOffset(true);
1348    }
1349
1350    /**
1351     * Returns the total bottom padding of the view, including the bottom
1352     * Drawable if any, the extra space to keep more than maxLines
1353     * from showing, and the vertical offset for gravity, if any.
1354     */
1355    public int getTotalPaddingBottom() {
1356        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1357    }
1358
1359    /**
1360     * Sets the Drawables (if any) to appear to the left of, above,
1361     * to the right of, and below the text.  Use null if you do not
1362     * want a Drawable there.  The Drawables must already have had
1363     * {@link Drawable#setBounds} called.
1364     *
1365     * @attr ref android.R.styleable#TextView_drawableLeft
1366     * @attr ref android.R.styleable#TextView_drawableTop
1367     * @attr ref android.R.styleable#TextView_drawableRight
1368     * @attr ref android.R.styleable#TextView_drawableBottom
1369     */
1370    public void setCompoundDrawables(Drawable left, Drawable top,
1371                                     Drawable right, Drawable bottom) {
1372        Drawables dr = mDrawables;
1373
1374        final boolean drawables = left != null || top != null
1375                || right != null || bottom != null;
1376
1377        if (!drawables) {
1378            // Clearing drawables...  can we free the data structure?
1379            if (dr != null) {
1380                if (dr.mDrawablePadding == 0) {
1381                    mDrawables = null;
1382                } else {
1383                    // We need to retain the last set padding, so just clear
1384                    // out all of the fields in the existing structure.
1385                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1386                    dr.mDrawableLeft = null;
1387                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1388                    dr.mDrawableTop = null;
1389                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1390                    dr.mDrawableRight = null;
1391                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1392                    dr.mDrawableBottom = null;
1393                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1394                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1395                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1396                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1397                }
1398            }
1399        } else {
1400            if (dr == null) {
1401                mDrawables = dr = new Drawables();
1402            }
1403
1404            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1405                dr.mDrawableLeft.setCallback(null);
1406            }
1407            dr.mDrawableLeft = left;
1408
1409            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1410                dr.mDrawableTop.setCallback(null);
1411            }
1412            dr.mDrawableTop = top;
1413
1414            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1415                dr.mDrawableRight.setCallback(null);
1416            }
1417            dr.mDrawableRight = right;
1418
1419            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1420                dr.mDrawableBottom.setCallback(null);
1421            }
1422            dr.mDrawableBottom = bottom;
1423
1424            final Rect compoundRect = dr.mCompoundRect;
1425            int[] state;
1426
1427            state = getDrawableState();
1428
1429            if (left != null) {
1430                left.setState(state);
1431                left.copyBounds(compoundRect);
1432                left.setCallback(this);
1433                dr.mDrawableSizeLeft = compoundRect.width();
1434                dr.mDrawableHeightLeft = compoundRect.height();
1435            } else {
1436                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1437            }
1438
1439            if (right != null) {
1440                right.setState(state);
1441                right.copyBounds(compoundRect);
1442                right.setCallback(this);
1443                dr.mDrawableSizeRight = compoundRect.width();
1444                dr.mDrawableHeightRight = compoundRect.height();
1445            } else {
1446                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1447            }
1448
1449            if (top != null) {
1450                top.setState(state);
1451                top.copyBounds(compoundRect);
1452                top.setCallback(this);
1453                dr.mDrawableSizeTop = compoundRect.height();
1454                dr.mDrawableWidthTop = compoundRect.width();
1455            } else {
1456                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1457            }
1458
1459            if (bottom != null) {
1460                bottom.setState(state);
1461                bottom.copyBounds(compoundRect);
1462                bottom.setCallback(this);
1463                dr.mDrawableSizeBottom = compoundRect.height();
1464                dr.mDrawableWidthBottom = compoundRect.width();
1465            } else {
1466                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1467            }
1468        }
1469
1470        invalidate();
1471        requestLayout();
1472    }
1473
1474    /**
1475     * Sets the Drawables (if any) to appear to the left of, above,
1476     * to the right of, and below the text.  Use 0 if you do not
1477     * want a Drawable there. The Drawables' bounds will be set to
1478     * their intrinsic bounds.
1479     *
1480     * @param left Resource identifier of the left Drawable.
1481     * @param top Resource identifier of the top Drawable.
1482     * @param right Resource identifier of the right Drawable.
1483     * @param bottom Resource identifier of the bottom Drawable.
1484     *
1485     * @attr ref android.R.styleable#TextView_drawableLeft
1486     * @attr ref android.R.styleable#TextView_drawableTop
1487     * @attr ref android.R.styleable#TextView_drawableRight
1488     * @attr ref android.R.styleable#TextView_drawableBottom
1489     */
1490    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1491        final Resources resources = getContext().getResources();
1492        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1493                top != 0 ? resources.getDrawable(top) : null,
1494                right != 0 ? resources.getDrawable(right) : null,
1495                bottom != 0 ? resources.getDrawable(bottom) : null);
1496    }
1497
1498    /**
1499     * Sets the Drawables (if any) to appear to the left of, above,
1500     * to the right of, and below the text.  Use null if you do not
1501     * want a Drawable there. The Drawables' bounds will be set to
1502     * their intrinsic bounds.
1503     *
1504     * @attr ref android.R.styleable#TextView_drawableLeft
1505     * @attr ref android.R.styleable#TextView_drawableTop
1506     * @attr ref android.R.styleable#TextView_drawableRight
1507     * @attr ref android.R.styleable#TextView_drawableBottom
1508     */
1509    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1510            Drawable right, Drawable bottom) {
1511
1512        if (left != null) {
1513            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1514        }
1515        if (right != null) {
1516            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1517        }
1518        if (top != null) {
1519            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1520        }
1521        if (bottom != null) {
1522            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1523        }
1524        setCompoundDrawables(left, top, right, bottom);
1525    }
1526
1527    /**
1528     * Returns drawables for the left, top, right, and bottom borders.
1529     */
1530    public Drawable[] getCompoundDrawables() {
1531        final Drawables dr = mDrawables;
1532        if (dr != null) {
1533            return new Drawable[] {
1534                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1535            };
1536        } else {
1537            return new Drawable[] { null, null, null, null };
1538        }
1539    }
1540
1541    /**
1542     * Sets the size of the padding between the compound drawables and
1543     * the text.
1544     *
1545     * @attr ref android.R.styleable#TextView_drawablePadding
1546     */
1547    public void setCompoundDrawablePadding(int pad) {
1548        Drawables dr = mDrawables;
1549        if (pad == 0) {
1550            if (dr != null) {
1551                dr.mDrawablePadding = pad;
1552            }
1553        } else {
1554            if (dr == null) {
1555                mDrawables = dr = new Drawables();
1556            }
1557            dr.mDrawablePadding = pad;
1558        }
1559
1560        invalidate();
1561        requestLayout();
1562    }
1563
1564    /**
1565     * Returns the padding between the compound drawables and the text.
1566     */
1567    public int getCompoundDrawablePadding() {
1568        final Drawables dr = mDrawables;
1569        return dr != null ? dr.mDrawablePadding : 0;
1570    }
1571
1572    @Override
1573    public void setPadding(int left, int top, int right, int bottom) {
1574        if (left != mPaddingLeft ||
1575            right != mPaddingRight ||
1576            top != mPaddingTop ||
1577            bottom != mPaddingBottom) {
1578            nullLayouts();
1579        }
1580
1581        // the super call will requestLayout()
1582        super.setPadding(left, top, right, bottom);
1583        invalidate();
1584    }
1585
1586    /**
1587     * Gets the autolink mask of the text.  See {@link
1588     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1589     * possible values.
1590     *
1591     * @attr ref android.R.styleable#TextView_autoLink
1592     */
1593    public final int getAutoLinkMask() {
1594        return mAutoLinkMask;
1595    }
1596
1597    /**
1598     * Sets the text color, size, style, hint color, and highlight color
1599     * from the specified TextAppearance resource.
1600     */
1601    public void setTextAppearance(Context context, int resid) {
1602        TypedArray appearance =
1603            context.obtainStyledAttributes(resid,
1604                                           com.android.internal.R.styleable.TextAppearance);
1605
1606        int color;
1607        ColorStateList colors;
1608        int ts;
1609
1610        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1611        if (color != 0) {
1612            setHighlightColor(color);
1613        }
1614
1615        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1616                                              TextAppearance_textColor);
1617        if (colors != null) {
1618            setTextColor(colors);
1619        }
1620
1621        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1622                                              TextAppearance_textSize, 0);
1623        if (ts != 0) {
1624            setRawTextSize(ts);
1625        }
1626
1627        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1628                                              TextAppearance_textColorHint);
1629        if (colors != null) {
1630            setHintTextColor(colors);
1631        }
1632
1633        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1634                                              TextAppearance_textColorLink);
1635        if (colors != null) {
1636            setLinkTextColor(colors);
1637        }
1638
1639        int typefaceIndex, styleIndex;
1640
1641        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1642                                          TextAppearance_typeface, -1);
1643        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1644                                       TextAppearance_textStyle, -1);
1645
1646        setTypefaceByIndex(typefaceIndex, styleIndex);
1647        appearance.recycle();
1648    }
1649
1650    /**
1651     * @return the size (in pixels) of the default text size in this TextView.
1652     */
1653    public float getTextSize() {
1654        return mTextPaint.getTextSize();
1655    }
1656
1657    /**
1658     * Set the default text size to the given value, interpreted as "scaled
1659     * pixel" units.  This size is adjusted based on the current density and
1660     * user font size preference.
1661     *
1662     * @param size The scaled pixel size.
1663     *
1664     * @attr ref android.R.styleable#TextView_textSize
1665     */
1666    @android.view.RemotableViewMethod
1667    public void setTextSize(float size) {
1668        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1669    }
1670
1671    /**
1672     * Set the default text size to a given unit and value.  See {@link
1673     * TypedValue} for the possible dimension units.
1674     *
1675     * @param unit The desired dimension unit.
1676     * @param size The desired size in the given units.
1677     *
1678     * @attr ref android.R.styleable#TextView_textSize
1679     */
1680    public void setTextSize(int unit, float size) {
1681        Context c = getContext();
1682        Resources r;
1683
1684        if (c == null)
1685            r = Resources.getSystem();
1686        else
1687            r = c.getResources();
1688
1689        setRawTextSize(TypedValue.applyDimension(
1690            unit, size, r.getDisplayMetrics()));
1691    }
1692
1693    private void setRawTextSize(float size) {
1694        if (size != mTextPaint.getTextSize()) {
1695            mTextPaint.setTextSize(size);
1696
1697            if (mLayout != null) {
1698                nullLayouts();
1699                requestLayout();
1700                invalidate();
1701            }
1702        }
1703    }
1704
1705    /**
1706     * @return the extent by which text is currently being stretched
1707     * horizontally.  This will usually be 1.
1708     */
1709    public float getTextScaleX() {
1710        return mTextPaint.getTextScaleX();
1711    }
1712
1713    /**
1714     * Sets the extent by which text should be stretched horizontally.
1715     *
1716     * @attr ref android.R.styleable#TextView_textScaleX
1717     */
1718    @android.view.RemotableViewMethod
1719    public void setTextScaleX(float size) {
1720        if (size != mTextPaint.getTextScaleX()) {
1721            mUserSetTextScaleX = true;
1722            mTextPaint.setTextScaleX(size);
1723
1724            if (mLayout != null) {
1725                nullLayouts();
1726                requestLayout();
1727                invalidate();
1728            }
1729        }
1730    }
1731
1732    /**
1733     * Sets the typeface and style in which the text should be displayed.
1734     * Note that not all Typeface families actually have bold and italic
1735     * variants, so you may need to use
1736     * {@link #setTypeface(Typeface, int)} to get the appearance
1737     * that you actually want.
1738     *
1739     * @attr ref android.R.styleable#TextView_typeface
1740     * @attr ref android.R.styleable#TextView_textStyle
1741     */
1742    public void setTypeface(Typeface tf) {
1743        if (mTextPaint.getTypeface() != tf) {
1744            mTextPaint.setTypeface(tf);
1745
1746            if (mLayout != null) {
1747                nullLayouts();
1748                requestLayout();
1749                invalidate();
1750            }
1751        }
1752    }
1753
1754    /**
1755     * @return the current typeface and style in which the text is being
1756     * displayed.
1757     */
1758    public Typeface getTypeface() {
1759        return mTextPaint.getTypeface();
1760    }
1761
1762    /**
1763     * Sets the text color for all the states (normal, selected,
1764     * focused) to be this color.
1765     *
1766     * @attr ref android.R.styleable#TextView_textColor
1767     */
1768    @android.view.RemotableViewMethod
1769    public void setTextColor(int color) {
1770        mTextColor = ColorStateList.valueOf(color);
1771        updateTextColors();
1772    }
1773
1774    /**
1775     * Sets the text color.
1776     *
1777     * @attr ref android.R.styleable#TextView_textColor
1778     */
1779    public void setTextColor(ColorStateList colors) {
1780        if (colors == null) {
1781            throw new NullPointerException();
1782        }
1783
1784        mTextColor = colors;
1785        updateTextColors();
1786    }
1787
1788    /**
1789     * Return the set of text colors.
1790     *
1791     * @return Returns the set of text colors.
1792     */
1793    public final ColorStateList getTextColors() {
1794        return mTextColor;
1795    }
1796
1797    /**
1798     * <p>Return the current color selected for normal text.</p>
1799     *
1800     * @return Returns the current text color.
1801     */
1802    public final int getCurrentTextColor() {
1803        return mCurTextColor;
1804    }
1805
1806    /**
1807     * Sets the color used to display the selection highlight.
1808     *
1809     * @attr ref android.R.styleable#TextView_textColorHighlight
1810     */
1811    @android.view.RemotableViewMethod
1812    public void setHighlightColor(int color) {
1813        if (mHighlightColor != color) {
1814            mHighlightColor = color;
1815            invalidate();
1816        }
1817    }
1818
1819    /**
1820     * Gives the text a shadow of the specified radius and color, the specified
1821     * distance from its normal position.
1822     *
1823     * @attr ref android.R.styleable#TextView_shadowColor
1824     * @attr ref android.R.styleable#TextView_shadowDx
1825     * @attr ref android.R.styleable#TextView_shadowDy
1826     * @attr ref android.R.styleable#TextView_shadowRadius
1827     */
1828    public void setShadowLayer(float radius, float dx, float dy, int color) {
1829        mTextPaint.setShadowLayer(radius, dx, dy, color);
1830
1831        mShadowRadius = radius;
1832        mShadowDx = dx;
1833        mShadowDy = dy;
1834
1835        invalidate();
1836    }
1837
1838    /**
1839     * @return the base paint used for the text.  Please use this only to
1840     * consult the Paint's properties and not to change them.
1841     */
1842    public TextPaint getPaint() {
1843        return mTextPaint;
1844    }
1845
1846    /**
1847     * Sets the autolink mask of the text.  See {@link
1848     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1849     * possible values.
1850     *
1851     * @attr ref android.R.styleable#TextView_autoLink
1852     */
1853    @android.view.RemotableViewMethod
1854    public final void setAutoLinkMask(int mask) {
1855        mAutoLinkMask = mask;
1856    }
1857
1858    /**
1859     * Sets whether the movement method will automatically be set to
1860     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1861     * set to nonzero and links are detected in {@link #setText}.
1862     * The default is true.
1863     *
1864     * @attr ref android.R.styleable#TextView_linksClickable
1865     */
1866    @android.view.RemotableViewMethod
1867    public final void setLinksClickable(boolean whether) {
1868        mLinksClickable = whether;
1869    }
1870
1871    /**
1872     * Returns whether the movement method will automatically be set to
1873     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1874     * set to nonzero and links are detected in {@link #setText}.
1875     * The default is true.
1876     *
1877     * @attr ref android.R.styleable#TextView_linksClickable
1878     */
1879    public final boolean getLinksClickable() {
1880        return mLinksClickable;
1881    }
1882
1883    /**
1884     * Returns the list of URLSpans attached to the text
1885     * (by {@link Linkify} or otherwise) if any.  You can call
1886     * {@link URLSpan#getURL} on them to find where they link to
1887     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1888     * to find the region of the text they are attached to.
1889     */
1890    public URLSpan[] getUrls() {
1891        if (mText instanceof Spanned) {
1892            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1893        } else {
1894            return new URLSpan[0];
1895        }
1896    }
1897
1898    /**
1899     * Sets the color of the hint text.
1900     *
1901     * @attr ref android.R.styleable#TextView_textColorHint
1902     */
1903    @android.view.RemotableViewMethod
1904    public final void setHintTextColor(int color) {
1905        mHintTextColor = ColorStateList.valueOf(color);
1906        updateTextColors();
1907    }
1908
1909    /**
1910     * Sets the color of the hint text.
1911     *
1912     * @attr ref android.R.styleable#TextView_textColorHint
1913     */
1914    public final void setHintTextColor(ColorStateList colors) {
1915        mHintTextColor = colors;
1916        updateTextColors();
1917    }
1918
1919    /**
1920     * <p>Return the color used to paint the hint text.</p>
1921     *
1922     * @return Returns the list of hint text colors.
1923     */
1924    public final ColorStateList getHintTextColors() {
1925        return mHintTextColor;
1926    }
1927
1928    /**
1929     * <p>Return the current color selected to paint the hint text.</p>
1930     *
1931     * @return Returns the current hint text color.
1932     */
1933    public final int getCurrentHintTextColor() {
1934        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
1935    }
1936
1937    /**
1938     * Sets the color of links in the text.
1939     *
1940     * @attr ref android.R.styleable#TextView_textColorLink
1941     */
1942    @android.view.RemotableViewMethod
1943    public final void setLinkTextColor(int color) {
1944        mLinkTextColor = ColorStateList.valueOf(color);
1945        updateTextColors();
1946    }
1947
1948    /**
1949     * Sets the color of links in the text.
1950     *
1951     * @attr ref android.R.styleable#TextView_textColorLink
1952     */
1953    public final void setLinkTextColor(ColorStateList colors) {
1954        mLinkTextColor = colors;
1955        updateTextColors();
1956    }
1957
1958    /**
1959     * <p>Returns the color used to paint links in the text.</p>
1960     *
1961     * @return Returns the list of link text colors.
1962     */
1963    public final ColorStateList getLinkTextColors() {
1964        return mLinkTextColor;
1965    }
1966
1967    /**
1968     * Sets the horizontal alignment of the text and the
1969     * vertical gravity that will be used when there is extra space
1970     * in the TextView beyond what is required for the text itself.
1971     *
1972     * @see android.view.Gravity
1973     * @attr ref android.R.styleable#TextView_gravity
1974     */
1975    public void setGravity(int gravity) {
1976        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
1977            gravity |= Gravity.LEFT;
1978        }
1979        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
1980            gravity |= Gravity.TOP;
1981        }
1982
1983        boolean newLayout = false;
1984
1985        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
1986            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
1987            newLayout = true;
1988        }
1989
1990        if (gravity != mGravity) {
1991            invalidate();
1992        }
1993
1994        mGravity = gravity;
1995
1996        if (mLayout != null && newLayout) {
1997            // XXX this is heavy-handed because no actual content changes.
1998            int want = mLayout.getWidth();
1999            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2000
2001            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2002                          mRight - mLeft - getCompoundPaddingLeft() -
2003                          getCompoundPaddingRight(), true);
2004        }
2005    }
2006
2007    /**
2008     * Returns the horizontal and vertical alignment of this TextView.
2009     *
2010     * @see android.view.Gravity
2011     * @attr ref android.R.styleable#TextView_gravity
2012     */
2013    public int getGravity() {
2014        return mGravity;
2015    }
2016
2017    /**
2018     * @return the flags on the Paint being used to display the text.
2019     * @see Paint#getFlags
2020     */
2021    public int getPaintFlags() {
2022        return mTextPaint.getFlags();
2023    }
2024
2025    /**
2026     * Sets flags on the Paint being used to display the text and
2027     * reflows the text if they are different from the old flags.
2028     * @see Paint#setFlags
2029     */
2030    @android.view.RemotableViewMethod
2031    public void setPaintFlags(int flags) {
2032        if (mTextPaint.getFlags() != flags) {
2033            mTextPaint.setFlags(flags);
2034
2035            if (mLayout != null) {
2036                nullLayouts();
2037                requestLayout();
2038                invalidate();
2039            }
2040        }
2041    }
2042
2043    /**
2044     * Sets whether the text should be allowed to be wider than the
2045     * View is.  If false, it will be wrapped to the width of the View.
2046     *
2047     * @attr ref android.R.styleable#TextView_scrollHorizontally
2048     */
2049    public void setHorizontallyScrolling(boolean whether) {
2050        mHorizontallyScrolling = whether;
2051
2052        if (mLayout != null) {
2053            nullLayouts();
2054            requestLayout();
2055            invalidate();
2056        }
2057    }
2058
2059    /**
2060     * Makes the TextView at least this many lines tall
2061     *
2062     * @attr ref android.R.styleable#TextView_minLines
2063     */
2064    @android.view.RemotableViewMethod
2065    public void setMinLines(int minlines) {
2066        mMinimum = minlines;
2067        mMinMode = LINES;
2068
2069        requestLayout();
2070        invalidate();
2071    }
2072
2073    /**
2074     * Makes the TextView at least this many pixels tall
2075     *
2076     * @attr ref android.R.styleable#TextView_minHeight
2077     */
2078    @android.view.RemotableViewMethod
2079    public void setMinHeight(int minHeight) {
2080        mMinimum = minHeight;
2081        mMinMode = PIXELS;
2082
2083        requestLayout();
2084        invalidate();
2085    }
2086
2087    /**
2088     * Makes the TextView at most this many lines tall
2089     *
2090     * @attr ref android.R.styleable#TextView_maxLines
2091     */
2092    @android.view.RemotableViewMethod
2093    public void setMaxLines(int maxlines) {
2094        mMaximum = maxlines;
2095        mMaxMode = LINES;
2096
2097        requestLayout();
2098        invalidate();
2099    }
2100
2101    /**
2102     * Makes the TextView at most this many pixels tall
2103     *
2104     * @attr ref android.R.styleable#TextView_maxHeight
2105     */
2106    @android.view.RemotableViewMethod
2107    public void setMaxHeight(int maxHeight) {
2108        mMaximum = maxHeight;
2109        mMaxMode = PIXELS;
2110
2111        requestLayout();
2112        invalidate();
2113    }
2114
2115    /**
2116     * Makes the TextView exactly this many lines tall
2117     *
2118     * @attr ref android.R.styleable#TextView_lines
2119     */
2120    @android.view.RemotableViewMethod
2121    public void setLines(int lines) {
2122        mMaximum = mMinimum = lines;
2123        mMaxMode = mMinMode = LINES;
2124
2125        requestLayout();
2126        invalidate();
2127    }
2128
2129    /**
2130     * Makes the TextView exactly this many pixels tall.
2131     * You could do the same thing by specifying this number in the
2132     * LayoutParams.
2133     *
2134     * @attr ref android.R.styleable#TextView_height
2135     */
2136    @android.view.RemotableViewMethod
2137    public void setHeight(int pixels) {
2138        mMaximum = mMinimum = pixels;
2139        mMaxMode = mMinMode = PIXELS;
2140
2141        requestLayout();
2142        invalidate();
2143    }
2144
2145    /**
2146     * Makes the TextView at least this many ems wide
2147     *
2148     * @attr ref android.R.styleable#TextView_minEms
2149     */
2150    @android.view.RemotableViewMethod
2151    public void setMinEms(int minems) {
2152        mMinWidth = minems;
2153        mMinWidthMode = EMS;
2154
2155        requestLayout();
2156        invalidate();
2157    }
2158
2159    /**
2160     * Makes the TextView at least this many pixels wide
2161     *
2162     * @attr ref android.R.styleable#TextView_minWidth
2163     */
2164    @android.view.RemotableViewMethod
2165    public void setMinWidth(int minpixels) {
2166        mMinWidth = minpixels;
2167        mMinWidthMode = PIXELS;
2168
2169        requestLayout();
2170        invalidate();
2171    }
2172
2173    /**
2174     * Makes the TextView at most this many ems wide
2175     *
2176     * @attr ref android.R.styleable#TextView_maxEms
2177     */
2178    @android.view.RemotableViewMethod
2179    public void setMaxEms(int maxems) {
2180        mMaxWidth = maxems;
2181        mMaxWidthMode = EMS;
2182
2183        requestLayout();
2184        invalidate();
2185    }
2186
2187    /**
2188     * Makes the TextView at most this many pixels wide
2189     *
2190     * @attr ref android.R.styleable#TextView_maxWidth
2191     */
2192    @android.view.RemotableViewMethod
2193    public void setMaxWidth(int maxpixels) {
2194        mMaxWidth = maxpixels;
2195        mMaxWidthMode = PIXELS;
2196
2197        requestLayout();
2198        invalidate();
2199    }
2200
2201    /**
2202     * Makes the TextView exactly this many ems wide
2203     *
2204     * @attr ref android.R.styleable#TextView_ems
2205     */
2206    @android.view.RemotableViewMethod
2207    public void setEms(int ems) {
2208        mMaxWidth = mMinWidth = ems;
2209        mMaxWidthMode = mMinWidthMode = EMS;
2210
2211        requestLayout();
2212        invalidate();
2213    }
2214
2215    /**
2216     * Makes the TextView exactly this many pixels wide.
2217     * You could do the same thing by specifying this number in the
2218     * LayoutParams.
2219     *
2220     * @attr ref android.R.styleable#TextView_width
2221     */
2222    @android.view.RemotableViewMethod
2223    public void setWidth(int pixels) {
2224        mMaxWidth = mMinWidth = pixels;
2225        mMaxWidthMode = mMinWidthMode = PIXELS;
2226
2227        requestLayout();
2228        invalidate();
2229    }
2230
2231
2232    /**
2233     * Sets line spacing for this TextView.  Each line will have its height
2234     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2235     *
2236     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2237     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2238     */
2239    public void setLineSpacing(float add, float mult) {
2240        mSpacingMult = mult;
2241        mSpacingAdd = add;
2242
2243        if (mLayout != null) {
2244            nullLayouts();
2245            requestLayout();
2246            invalidate();
2247        }
2248    }
2249
2250    /**
2251     * Convenience method: Append the specified text to the TextView's
2252     * display buffer, upgrading it to BufferType.EDITABLE if it was
2253     * not already editable.
2254     */
2255    public final void append(CharSequence text) {
2256        append(text, 0, text.length());
2257    }
2258
2259    /**
2260     * Convenience method: Append the specified text slice to the TextView's
2261     * display buffer, upgrading it to BufferType.EDITABLE if it was
2262     * not already editable.
2263     */
2264    public void append(CharSequence text, int start, int end) {
2265        if (!(mText instanceof Editable)) {
2266            setText(mText, BufferType.EDITABLE);
2267        }
2268
2269        ((Editable) mText).append(text, start, end);
2270    }
2271
2272    private void updateTextColors() {
2273        boolean inval = false;
2274        int color = mTextColor.getColorForState(getDrawableState(), 0);
2275        if (color != mCurTextColor) {
2276            mCurTextColor = color;
2277            inval = true;
2278        }
2279        if (mLinkTextColor != null) {
2280            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2281            if (color != mTextPaint.linkColor) {
2282                mTextPaint.linkColor = color;
2283                inval = true;
2284            }
2285        }
2286        if (mHintTextColor != null) {
2287            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2288            if (color != mCurHintTextColor && mText.length() == 0) {
2289                mCurHintTextColor = color;
2290                inval = true;
2291            }
2292        }
2293        if (inval) {
2294            invalidate();
2295        }
2296    }
2297
2298    @Override
2299    protected void drawableStateChanged() {
2300        super.drawableStateChanged();
2301        if (mTextColor != null && mTextColor.isStateful()
2302                || (mHintTextColor != null && mHintTextColor.isStateful())
2303                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2304            updateTextColors();
2305        }
2306
2307        final Drawables dr = mDrawables;
2308        if (dr != null) {
2309            int[] state = getDrawableState();
2310            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2311                dr.mDrawableTop.setState(state);
2312            }
2313            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2314                dr.mDrawableBottom.setState(state);
2315            }
2316            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2317                dr.mDrawableLeft.setState(state);
2318            }
2319            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2320                dr.mDrawableRight.setState(state);
2321            }
2322        }
2323    }
2324
2325    /**
2326     * User interface state that is stored by TextView for implementing
2327     * {@link View#onSaveInstanceState}.
2328     */
2329    public static class SavedState extends BaseSavedState {
2330        int selStart;
2331        int selEnd;
2332        CharSequence text;
2333        boolean frozenWithFocus;
2334        CharSequence error;
2335
2336        SavedState(Parcelable superState) {
2337            super(superState);
2338        }
2339
2340        @Override
2341        public void writeToParcel(Parcel out, int flags) {
2342            super.writeToParcel(out, flags);
2343            out.writeInt(selStart);
2344            out.writeInt(selEnd);
2345            out.writeInt(frozenWithFocus ? 1 : 0);
2346            TextUtils.writeToParcel(text, out, flags);
2347
2348            if (error == null) {
2349                out.writeInt(0);
2350            } else {
2351                out.writeInt(1);
2352                TextUtils.writeToParcel(error, out, flags);
2353            }
2354        }
2355
2356        @Override
2357        public String toString() {
2358            String str = "TextView.SavedState{"
2359                    + Integer.toHexString(System.identityHashCode(this))
2360                    + " start=" + selStart + " end=" + selEnd;
2361            if (text != null) {
2362                str += " text=" + text;
2363            }
2364            return str + "}";
2365        }
2366
2367        @SuppressWarnings("hiding")
2368        public static final Parcelable.Creator<SavedState> CREATOR
2369                = new Parcelable.Creator<SavedState>() {
2370            public SavedState createFromParcel(Parcel in) {
2371                return new SavedState(in);
2372            }
2373
2374            public SavedState[] newArray(int size) {
2375                return new SavedState[size];
2376            }
2377        };
2378
2379        private SavedState(Parcel in) {
2380            super(in);
2381            selStart = in.readInt();
2382            selEnd = in.readInt();
2383            frozenWithFocus = (in.readInt() != 0);
2384            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2385
2386            if (in.readInt() != 0) {
2387                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2388            }
2389        }
2390    }
2391
2392    @Override
2393    public Parcelable onSaveInstanceState() {
2394        Parcelable superState = super.onSaveInstanceState();
2395
2396        // Save state if we are forced to
2397        boolean save = mFreezesText;
2398        int start = 0;
2399        int end = 0;
2400
2401        if (mText != null) {
2402            start = getSelectionStart();
2403            end = getSelectionEnd();
2404            if (start >= 0 || end >= 0) {
2405                // Or save state if there is a selection
2406                save = true;
2407            }
2408        }
2409
2410        if (save) {
2411            SavedState ss = new SavedState(superState);
2412            // XXX Should also save the current scroll position!
2413            ss.selStart = start;
2414            ss.selEnd = end;
2415
2416            if (mText instanceof Spanned) {
2417                /*
2418                 * Calling setText() strips off any ChangeWatchers;
2419                 * strip them now to avoid leaking references.
2420                 * But do it to a copy so that if there are any
2421                 * further changes to the text of this view, it
2422                 * won't get into an inconsistent state.
2423                 */
2424
2425                Spannable sp = new SpannableString(mText);
2426
2427                for (ChangeWatcher cw :
2428                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2429                    sp.removeSpan(cw);
2430                }
2431
2432                ss.text = sp;
2433            } else {
2434                ss.text = mText.toString();
2435            }
2436
2437            if (isFocused() && start >= 0 && end >= 0) {
2438                ss.frozenWithFocus = true;
2439            }
2440
2441            ss.error = mError;
2442
2443            return ss;
2444        }
2445
2446        return superState;
2447    }
2448
2449    @Override
2450    public void onRestoreInstanceState(Parcelable state) {
2451        if (!(state instanceof SavedState)) {
2452            super.onRestoreInstanceState(state);
2453            return;
2454        }
2455
2456        SavedState ss = (SavedState)state;
2457        super.onRestoreInstanceState(ss.getSuperState());
2458
2459        // XXX restore buffer type too, as well as lots of other stuff
2460        if (ss.text != null) {
2461            setText(ss.text);
2462        }
2463
2464        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2465            if (mText instanceof Spannable) {
2466                int len = mText.length();
2467
2468                if (ss.selStart > len || ss.selEnd > len) {
2469                    String restored = "";
2470
2471                    if (ss.text != null) {
2472                        restored = "(restored) ";
2473                    }
2474
2475                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2476                          "/" + ss.selEnd + " out of range for " + restored +
2477                          "text " + mText);
2478                } else {
2479                    Selection.setSelection((Spannable) mText, ss.selStart,
2480                                           ss.selEnd);
2481
2482                    if (ss.frozenWithFocus) {
2483                        mFrozenWithFocus = true;
2484                    }
2485                }
2486            }
2487        }
2488
2489        if (ss.error != null) {
2490            final CharSequence error = ss.error;
2491            // Display the error later, after the first layout pass
2492            post(new Runnable() {
2493                public void run() {
2494                    setError(error);
2495                }
2496            });
2497        }
2498    }
2499
2500    /**
2501     * Control whether this text view saves its entire text contents when
2502     * freezing to an icicle, in addition to dynamic state such as cursor
2503     * position.  By default this is false, not saving the text.  Set to true
2504     * if the text in the text view is not being saved somewhere else in
2505     * persistent storage (such as in a content provider) so that if the
2506     * view is later thawed the user will not lose their data.
2507     *
2508     * @param freezesText Controls whether a frozen icicle should include the
2509     * entire text data: true to include it, false to not.
2510     *
2511     * @attr ref android.R.styleable#TextView_freezesText
2512     */
2513    @android.view.RemotableViewMethod
2514    public void setFreezesText(boolean freezesText) {
2515        mFreezesText = freezesText;
2516    }
2517
2518    /**
2519     * Return whether this text view is including its entire text contents
2520     * in frozen icicles.
2521     *
2522     * @return Returns true if text is included, false if it isn't.
2523     *
2524     * @see #setFreezesText
2525     */
2526    public boolean getFreezesText() {
2527        return mFreezesText;
2528    }
2529
2530    ///////////////////////////////////////////////////////////////////////////
2531
2532    /**
2533     * Sets the Factory used to create new Editables.
2534     */
2535    public final void setEditableFactory(Editable.Factory factory) {
2536        mEditableFactory = factory;
2537        setText(mText);
2538    }
2539
2540    /**
2541     * Sets the Factory used to create new Spannables.
2542     */
2543    public final void setSpannableFactory(Spannable.Factory factory) {
2544        mSpannableFactory = factory;
2545        setText(mText);
2546    }
2547
2548    /**
2549     * Sets the string value of the TextView. TextView <em>does not</em> accept
2550     * HTML-like formatting, which you can do with text strings in XML resource files.
2551     * To style your strings, attach android.text.style.* objects to a
2552     * {@link android.text.SpannableString SpannableString}, or see the
2553     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2554     * Available Resource Types</a> documentation for an example of setting
2555     * formatted text in the XML resource file.
2556     *
2557     * @attr ref android.R.styleable#TextView_text
2558     */
2559    @android.view.RemotableViewMethod
2560    public final void setText(CharSequence text) {
2561        setText(text, mBufferType);
2562    }
2563
2564    /**
2565     * Like {@link #setText(CharSequence)},
2566     * except that the cursor position (if any) is retained in the new text.
2567     *
2568     * @param text The new text to place in the text view.
2569     *
2570     * @see #setText(CharSequence)
2571     */
2572    @android.view.RemotableViewMethod
2573    public final void setTextKeepState(CharSequence text) {
2574        setTextKeepState(text, mBufferType);
2575    }
2576
2577    /**
2578     * Sets the text that this TextView is to display (see
2579     * {@link #setText(CharSequence)}) and also sets whether it is stored
2580     * in a styleable/spannable buffer and whether it is editable.
2581     *
2582     * @attr ref android.R.styleable#TextView_text
2583     * @attr ref android.R.styleable#TextView_bufferType
2584     */
2585    public void setText(CharSequence text, BufferType type) {
2586        setText(text, type, true, 0);
2587
2588        if (mCharWrapper != null) {
2589            mCharWrapper.mChars = null;
2590        }
2591    }
2592
2593    private void setText(CharSequence text, BufferType type,
2594                         boolean notifyBefore, int oldlen) {
2595        if (text == null) {
2596            text = "";
2597        }
2598
2599        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2600
2601        if (text instanceof Spanned &&
2602            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2603            setHorizontalFadingEdgeEnabled(true);
2604            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2605        }
2606
2607        int n = mFilters.length;
2608        for (int i = 0; i < n; i++) {
2609            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2610                                                  EMPTY_SPANNED, 0, 0);
2611            if (out != null) {
2612                text = out;
2613            }
2614        }
2615
2616        if (notifyBefore) {
2617            if (mText != null) {
2618                oldlen = mText.length();
2619                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2620            } else {
2621                sendBeforeTextChanged("", 0, 0, text.length());
2622            }
2623        }
2624
2625        boolean needEditableForNotification = false;
2626
2627        if (mListeners != null && mListeners.size() != 0) {
2628            needEditableForNotification = true;
2629        }
2630
2631        if (type == BufferType.EDITABLE || mInput != null ||
2632            needEditableForNotification) {
2633            Editable t = mEditableFactory.newEditable(text);
2634            text = t;
2635            setFilters(t, mFilters);
2636            InputMethodManager imm = InputMethodManager.peekInstance();
2637            if (imm != null) imm.restartInput(this);
2638        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2639            text = mSpannableFactory.newSpannable(text);
2640        } else if (!(text instanceof CharWrapper)) {
2641            text = TextUtils.stringOrSpannedString(text);
2642        }
2643
2644        if (mAutoLinkMask != 0) {
2645            Spannable s2;
2646
2647            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2648                s2 = (Spannable) text;
2649            } else {
2650                s2 = mSpannableFactory.newSpannable(text);
2651            }
2652
2653            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2654                text = s2;
2655                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2656
2657                /*
2658                 * We must go ahead and set the text before changing the
2659                 * movement method, because setMovementMethod() may call
2660                 * setText() again to try to upgrade the buffer type.
2661                 */
2662                mText = text;
2663
2664                if (mLinksClickable) {
2665                    setMovementMethod(LinkMovementMethod.getInstance());
2666                }
2667            }
2668        }
2669
2670        mBufferType = type;
2671        mText = text;
2672
2673        if (mTransformation == null)
2674            mTransformed = text;
2675        else
2676            mTransformed = mTransformation.getTransformation(text, this);
2677
2678        final int textLength = text.length();
2679
2680        if (text instanceof Spannable) {
2681            Spannable sp = (Spannable) text;
2682
2683            // Remove any ChangeWatchers that might have come
2684            // from other TextViews.
2685            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2686            final int count = watchers.length;
2687            for (int i = 0; i < count; i++)
2688                sp.removeSpan(watchers[i]);
2689
2690            if (mChangeWatcher == null)
2691                mChangeWatcher = new ChangeWatcher();
2692
2693            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2694                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2695
2696            if (mInput != null) {
2697                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2698            }
2699
2700            if (mTransformation != null) {
2701                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2702
2703            }
2704
2705            if (mMovement != null) {
2706                mMovement.initialize(this, (Spannable) text);
2707
2708                /*
2709                 * Initializing the movement method will have set the
2710                 * selection, so reset mSelectionMoved to keep that from
2711                 * interfering with the normal on-focus selection-setting.
2712                 */
2713                mSelectionMoved = false;
2714            }
2715        }
2716
2717        if (mLayout != null) {
2718            checkForRelayout();
2719        }
2720
2721        sendOnTextChanged(text, 0, oldlen, textLength);
2722        onTextChanged(text, 0, oldlen, textLength);
2723
2724        if (needEditableForNotification) {
2725            sendAfterTextChanged((Editable) text);
2726        }
2727
2728        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
2729        prepareCursorControllers();
2730    }
2731
2732    /**
2733     * Sets the TextView to display the specified slice of the specified
2734     * char array.  You must promise that you will not change the contents
2735     * of the array except for right before another call to setText(),
2736     * since the TextView has no way to know that the text
2737     * has changed and that it needs to invalidate and re-layout.
2738     */
2739    public final void setText(char[] text, int start, int len) {
2740        int oldlen = 0;
2741
2742        if (start < 0 || len < 0 || start + len > text.length) {
2743            throw new IndexOutOfBoundsException(start + ", " + len);
2744        }
2745
2746        /*
2747         * We must do the before-notification here ourselves because if
2748         * the old text is a CharWrapper we destroy it before calling
2749         * into the normal path.
2750         */
2751        if (mText != null) {
2752            oldlen = mText.length();
2753            sendBeforeTextChanged(mText, 0, oldlen, len);
2754        } else {
2755            sendBeforeTextChanged("", 0, 0, len);
2756        }
2757
2758        if (mCharWrapper == null) {
2759            mCharWrapper = new CharWrapper(text, start, len);
2760        } else {
2761            mCharWrapper.set(text, start, len);
2762        }
2763
2764        setText(mCharWrapper, mBufferType, false, oldlen);
2765    }
2766
2767    private static class CharWrapper
2768            implements CharSequence, GetChars, GraphicsOperations {
2769        private char[] mChars;
2770        private int mStart, mLength;
2771
2772        public CharWrapper(char[] chars, int start, int len) {
2773            mChars = chars;
2774            mStart = start;
2775            mLength = len;
2776        }
2777
2778        /* package */ void set(char[] chars, int start, int len) {
2779            mChars = chars;
2780            mStart = start;
2781            mLength = len;
2782        }
2783
2784        public int length() {
2785            return mLength;
2786        }
2787
2788        public char charAt(int off) {
2789            return mChars[off + mStart];
2790        }
2791
2792        @Override
2793        public String toString() {
2794            return new String(mChars, mStart, mLength);
2795        }
2796
2797        public CharSequence subSequence(int start, int end) {
2798            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2799                throw new IndexOutOfBoundsException(start + ", " + end);
2800            }
2801
2802            return new String(mChars, start + mStart, end - start);
2803        }
2804
2805        public void getChars(int start, int end, char[] buf, int off) {
2806            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2807                throw new IndexOutOfBoundsException(start + ", " + end);
2808            }
2809
2810            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2811        }
2812
2813        public void drawText(Canvas c, int start, int end,
2814                             float x, float y, Paint p) {
2815            c.drawText(mChars, start + mStart, end - start, x, y, p);
2816        }
2817
2818        public float measureText(int start, int end, Paint p) {
2819            return p.measureText(mChars, start + mStart, end - start);
2820        }
2821
2822        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2823            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2824        }
2825    }
2826
2827    /**
2828     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2829     * except that the cursor position (if any) is retained in the new text.
2830     *
2831     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2832     */
2833    public final void setTextKeepState(CharSequence text, BufferType type) {
2834        int start = getSelectionStart();
2835        int end = getSelectionEnd();
2836        int len = text.length();
2837
2838        setText(text, type);
2839
2840        if (start >= 0 || end >= 0) {
2841            if (mText instanceof Spannable) {
2842                Selection.setSelection((Spannable) mText,
2843                                       Math.max(0, Math.min(start, len)),
2844                                       Math.max(0, Math.min(end, len)));
2845            }
2846        }
2847    }
2848
2849    @android.view.RemotableViewMethod
2850    public final void setText(int resid) {
2851        setText(getContext().getResources().getText(resid));
2852    }
2853
2854    public final void setText(int resid, BufferType type) {
2855        setText(getContext().getResources().getText(resid), type);
2856    }
2857
2858    /**
2859     * Sets the text to be displayed when the text of the TextView is empty.
2860     * Null means to use the normal empty text. The hint does not currently
2861     * participate in determining the size of the view.
2862     *
2863     * @attr ref android.R.styleable#TextView_hint
2864     */
2865    @android.view.RemotableViewMethod
2866    public final void setHint(CharSequence hint) {
2867        mHint = TextUtils.stringOrSpannedString(hint);
2868
2869        if (mLayout != null) {
2870            checkForRelayout();
2871        }
2872
2873        if (mText.length() == 0) {
2874            invalidate();
2875        }
2876    }
2877
2878    /**
2879     * Sets the text to be displayed when the text of the TextView is empty,
2880     * from a resource.
2881     *
2882     * @attr ref android.R.styleable#TextView_hint
2883     */
2884    @android.view.RemotableViewMethod
2885    public final void setHint(int resid) {
2886        setHint(getContext().getResources().getText(resid));
2887    }
2888
2889    /**
2890     * Returns the hint that is displayed when the text of the TextView
2891     * is empty.
2892     *
2893     * @attr ref android.R.styleable#TextView_hint
2894     */
2895    @ViewDebug.CapturedViewProperty
2896    public CharSequence getHint() {
2897        return mHint;
2898    }
2899
2900    /**
2901     * Set the type of the content with a constant as defined for
2902     * {@link EditorInfo#inputType}.  This will take care of changing
2903     * the key listener, by calling {@link #setKeyListener(KeyListener)}, to
2904     * match the given content type.  If the given content type is
2905     * {@link EditorInfo#TYPE_NULL} then a soft keyboard will
2906     * not be displayed for this text view.
2907     *
2908     * @see #getInputType()
2909     * @see #setRawInputType(int)
2910     * @see android.text.InputType
2911     * @attr ref android.R.styleable#TextView_inputType
2912     */
2913    public void setInputType(int type) {
2914        final boolean wasPassword = isPasswordInputType(mInputType);
2915        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
2916        setInputType(type, false);
2917        final boolean isPassword = isPasswordInputType(type);
2918        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
2919        boolean forceUpdate = false;
2920        if (isPassword) {
2921            setTransformationMethod(PasswordTransformationMethod.getInstance());
2922            setTypefaceByIndex(MONOSPACE, 0);
2923        } else if (isVisiblePassword) {
2924            if (mTransformation == PasswordTransformationMethod.getInstance()) {
2925                forceUpdate = true;
2926            }
2927            setTypefaceByIndex(MONOSPACE, 0);
2928        } else if (wasPassword || wasVisiblePassword) {
2929            // not in password mode, clean up typeface and transformation
2930            setTypefaceByIndex(-1, -1);
2931            if (mTransformation == PasswordTransformationMethod.getInstance()) {
2932                forceUpdate = true;
2933            }
2934        }
2935
2936        boolean multiLine = (type&(EditorInfo.TYPE_MASK_CLASS
2937                        | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
2938                (EditorInfo.TYPE_CLASS_TEXT
2939                        | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
2940
2941        // We need to update the single line mode if it has changed or we
2942        // were previously in password mode.
2943        if (mSingleLine == multiLine || forceUpdate) {
2944            // Change single line mode, but only change the transformation if
2945            // we are not in password mode.
2946            applySingleLine(!multiLine, !isPassword);
2947        }
2948
2949        InputMethodManager imm = InputMethodManager.peekInstance();
2950        if (imm != null) imm.restartInput(this);
2951    }
2952
2953    private boolean isPasswordInputType(int inputType) {
2954        final int variation = inputType & (EditorInfo.TYPE_MASK_CLASS
2955                | EditorInfo.TYPE_MASK_VARIATION);
2956        return variation
2957                == (EditorInfo.TYPE_CLASS_TEXT
2958                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
2959    }
2960
2961    private boolean isVisiblePasswordInputType(int inputType) {
2962        final int variation = inputType & (EditorInfo.TYPE_MASK_CLASS
2963                | EditorInfo.TYPE_MASK_VARIATION);
2964        return variation
2965                == (EditorInfo.TYPE_CLASS_TEXT
2966                        | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
2967    }
2968
2969    /**
2970     * Directly change the content type integer of the text view, without
2971     * modifying any other state.
2972     * @see #setInputType(int)
2973     * @see android.text.InputType
2974     * @attr ref android.R.styleable#TextView_inputType
2975     */
2976    public void setRawInputType(int type) {
2977        mInputType = type;
2978    }
2979
2980    private void setInputType(int type, boolean direct) {
2981        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
2982        KeyListener input;
2983        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
2984            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
2985            TextKeyListener.Capitalize cap;
2986            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
2987                cap = TextKeyListener.Capitalize.CHARACTERS;
2988            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
2989                cap = TextKeyListener.Capitalize.WORDS;
2990            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
2991                cap = TextKeyListener.Capitalize.SENTENCES;
2992            } else {
2993                cap = TextKeyListener.Capitalize.NONE;
2994            }
2995            input = TextKeyListener.getInstance(autotext, cap);
2996        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
2997            input = DigitsKeyListener.getInstance(
2998                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
2999                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3000        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3001            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3002                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3003                    input = DateKeyListener.getInstance();
3004                    break;
3005                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3006                    input = TimeKeyListener.getInstance();
3007                    break;
3008                default:
3009                    input = DateTimeKeyListener.getInstance();
3010                    break;
3011            }
3012        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3013            input = DialerKeyListener.getInstance();
3014        } else {
3015            input = TextKeyListener.getInstance();
3016        }
3017        setRawInputType(type);
3018        if (direct) mInput = input;
3019        else {
3020            setKeyListenerOnly(input);
3021        }
3022    }
3023
3024    /**
3025     * Get the type of the content.
3026     *
3027     * @see #setInputType(int)
3028     * @see android.text.InputType
3029     */
3030    public int getInputType() {
3031        return mInputType;
3032    }
3033
3034    /**
3035     * Change the editor type integer associated with the text view, which
3036     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3037     * has focus.
3038     * @see #getImeOptions
3039     * @see android.view.inputmethod.EditorInfo
3040     * @attr ref android.R.styleable#TextView_imeOptions
3041     */
3042    public void setImeOptions(int imeOptions) {
3043        if (mInputContentType == null) {
3044            mInputContentType = new InputContentType();
3045        }
3046        mInputContentType.imeOptions = imeOptions;
3047    }
3048
3049    /**
3050     * Get the type of the IME editor.
3051     *
3052     * @see #setImeOptions(int)
3053     * @see android.view.inputmethod.EditorInfo
3054     */
3055    public int getImeOptions() {
3056        return mInputContentType != null
3057                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3058    }
3059
3060    /**
3061     * Change the custom IME action associated with the text view, which
3062     * will be reported to an IME with {@link EditorInfo#actionLabel}
3063     * and {@link EditorInfo#actionId} when it has focus.
3064     * @see #getImeActionLabel
3065     * @see #getImeActionId
3066     * @see android.view.inputmethod.EditorInfo
3067     * @attr ref android.R.styleable#TextView_imeActionLabel
3068     * @attr ref android.R.styleable#TextView_imeActionId
3069     */
3070    public void setImeActionLabel(CharSequence label, int actionId) {
3071        if (mInputContentType == null) {
3072            mInputContentType = new InputContentType();
3073        }
3074        mInputContentType.imeActionLabel = label;
3075        mInputContentType.imeActionId = actionId;
3076    }
3077
3078    /**
3079     * Get the IME action label previous set with {@link #setImeActionLabel}.
3080     *
3081     * @see #setImeActionLabel
3082     * @see android.view.inputmethod.EditorInfo
3083     */
3084    public CharSequence getImeActionLabel() {
3085        return mInputContentType != null
3086                ? mInputContentType.imeActionLabel : null;
3087    }
3088
3089    /**
3090     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3091     *
3092     * @see #setImeActionLabel
3093     * @see android.view.inputmethod.EditorInfo
3094     */
3095    public int getImeActionId() {
3096        return mInputContentType != null
3097                ? mInputContentType.imeActionId : 0;
3098    }
3099
3100    /**
3101     * Set a special listener to be called when an action is performed
3102     * on the text view.  This will be called when the enter key is pressed,
3103     * or when an action supplied to the IME is selected by the user.  Setting
3104     * this means that the normal hard key event will not insert a newline
3105     * into the text view, even if it is multi-line; holding down the ALT
3106     * modifier will, however, allow the user to insert a newline character.
3107     */
3108    public void setOnEditorActionListener(OnEditorActionListener l) {
3109        if (mInputContentType == null) {
3110            mInputContentType = new InputContentType();
3111        }
3112        mInputContentType.onEditorActionListener = l;
3113    }
3114
3115    /**
3116     * Called when an attached input method calls
3117     * {@link InputConnection#performEditorAction(int)
3118     * InputConnection.performEditorAction()}
3119     * for this text view.  The default implementation will call your action
3120     * listener supplied to {@link #setOnEditorActionListener}, or perform
3121     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3122     * EditorInfo.IME_ACTION_NEXT} or {@link EditorInfo#IME_ACTION_DONE
3123     * EditorInfo.IME_ACTION_DONE}.
3124     *
3125     * <p>For backwards compatibility, if no IME options have been set and the
3126     * text view would not normally advance focus on enter, then
3127     * the NEXT and DONE actions received here will be turned into an enter
3128     * key down/up pair to go through the normal key handling.
3129     *
3130     * @param actionCode The code of the action being performed.
3131     *
3132     * @see #setOnEditorActionListener
3133     */
3134    public void onEditorAction(int actionCode) {
3135        final InputContentType ict = mInputContentType;
3136        if (ict != null) {
3137            if (ict.onEditorActionListener != null) {
3138                if (ict.onEditorActionListener.onEditorAction(this,
3139                        actionCode, null)) {
3140                    return;
3141                }
3142            }
3143
3144            // This is the handling for some default action.
3145            // Note that for backwards compatibility we don't do this
3146            // default handling if explicit ime options have not been given,
3147            // instead turning this into the normal enter key codes that an
3148            // app may be expecting.
3149            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3150                View v = focusSearch(FOCUS_DOWN);
3151                if (v != null) {
3152                    if (!v.requestFocus(FOCUS_DOWN)) {
3153                        throw new IllegalStateException("focus search returned a view " +
3154                                "that wasn't able to take focus!");
3155                    }
3156                }
3157                return;
3158
3159            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3160                InputMethodManager imm = InputMethodManager.peekInstance();
3161                if (imm != null) {
3162                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3163                }
3164                return;
3165            }
3166        }
3167
3168        Handler h = getHandler();
3169        if (h != null) {
3170            long eventTime = SystemClock.uptimeMillis();
3171            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3172                    new KeyEvent(eventTime, eventTime,
3173                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0, 0, 0,
3174                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3175                    | KeyEvent.FLAG_EDITOR_ACTION)));
3176            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3177                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3178                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0, 0, 0,
3179                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3180                    | KeyEvent.FLAG_EDITOR_ACTION)));
3181        }
3182    }
3183
3184    /**
3185     * Set the private content type of the text, which is the
3186     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3187     * field that will be filled in when creating an input connection.
3188     *
3189     * @see #getPrivateImeOptions()
3190     * @see EditorInfo#privateImeOptions
3191     * @attr ref android.R.styleable#TextView_privateImeOptions
3192     */
3193    public void setPrivateImeOptions(String type) {
3194        if (mInputContentType == null) mInputContentType = new InputContentType();
3195        mInputContentType.privateImeOptions = type;
3196    }
3197
3198    /**
3199     * Get the private type of the content.
3200     *
3201     * @see #setPrivateImeOptions(String)
3202     * @see EditorInfo#privateImeOptions
3203     */
3204    public String getPrivateImeOptions() {
3205        return mInputContentType != null
3206                ? mInputContentType.privateImeOptions : null;
3207    }
3208
3209    /**
3210     * Set the extra input data of the text, which is the
3211     * {@link EditorInfo#extras TextBoxAttribute.extras}
3212     * Bundle that will be filled in when creating an input connection.  The
3213     * given integer is the resource ID of an XML resource holding an
3214     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3215     *
3216     * @see #getInputExtras(boolean)
3217     * @see EditorInfo#extras
3218     * @attr ref android.R.styleable#TextView_editorExtras
3219     */
3220    public void setInputExtras(int xmlResId)
3221            throws XmlPullParserException, IOException {
3222        XmlResourceParser parser = getResources().getXml(xmlResId);
3223        if (mInputContentType == null) mInputContentType = new InputContentType();
3224        mInputContentType.extras = new Bundle();
3225        getResources().parseBundleExtras(parser, mInputContentType.extras);
3226    }
3227
3228    /**
3229     * Retrieve the input extras currently associated with the text view, which
3230     * can be viewed as well as modified.
3231     *
3232     * @param create If true, the extras will be created if they don't already
3233     * exist.  Otherwise, null will be returned if none have been created.
3234     * @see #setInputExtras(int)
3235     * @see EditorInfo#extras
3236     * @attr ref android.R.styleable#TextView_editorExtras
3237     */
3238    public Bundle getInputExtras(boolean create) {
3239        if (mInputContentType == null) {
3240            if (!create) return null;
3241            mInputContentType = new InputContentType();
3242        }
3243        if (mInputContentType.extras == null) {
3244            if (!create) return null;
3245            mInputContentType.extras = new Bundle();
3246        }
3247        return mInputContentType.extras;
3248    }
3249
3250    /**
3251     * Returns the error message that was set to be displayed with
3252     * {@link #setError}, or <code>null</code> if no error was set
3253     * or if it the error was cleared by the widget after user input.
3254     */
3255    public CharSequence getError() {
3256        return mError;
3257    }
3258
3259    /**
3260     * Sets the right-hand compound drawable of the TextView to the "error"
3261     * icon and sets an error message that will be displayed in a popup when
3262     * the TextView has focus.  The icon and error message will be reset to
3263     * null when any key events cause changes to the TextView's text.  If the
3264     * <code>error</code> is <code>null</code>, the error message and icon
3265     * will be cleared.
3266     */
3267    @android.view.RemotableViewMethod
3268    public void setError(CharSequence error) {
3269        if (error == null) {
3270            setError(null, null);
3271        } else {
3272            Drawable dr = getContext().getResources().
3273                getDrawable(com.android.internal.R.drawable.
3274                            indicator_input_error);
3275
3276            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3277            setError(error, dr);
3278        }
3279    }
3280
3281    /**
3282     * Sets the right-hand compound drawable of the TextView to the specified
3283     * icon and sets an error message that will be displayed in a popup when
3284     * the TextView has focus.  The icon and error message will be reset to
3285     * null when any key events cause changes to the TextView's text.  The
3286     * drawable must already have had {@link Drawable#setBounds} set on it.
3287     * If the <code>error</code> is <code>null</code>, the error message will
3288     * be cleared (and you should provide a <code>null</code> icon as well).
3289     */
3290    public void setError(CharSequence error, Drawable icon) {
3291        error = TextUtils.stringOrSpannedString(error);
3292
3293        mError = error;
3294        mErrorWasChanged = true;
3295        final Drawables dr = mDrawables;
3296        if (dr != null) {
3297            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop,
3298                                 icon, dr.mDrawableBottom);
3299        } else {
3300            setCompoundDrawables(null, null, icon, null);
3301        }
3302
3303        if (error == null) {
3304            if (mPopup != null) {
3305                if (mPopup.isShowing()) {
3306                    mPopup.dismiss();
3307                }
3308
3309                mPopup = null;
3310            }
3311        } else {
3312            if (isFocused()) {
3313                showError();
3314            }
3315        }
3316    }
3317
3318    private void showError() {
3319        if (getWindowToken() == null) {
3320            mShowErrorAfterAttach = true;
3321            return;
3322        }
3323
3324        if (mPopup == null) {
3325            LayoutInflater inflater = LayoutInflater.from(getContext());
3326            final TextView err = (TextView) inflater.inflate(com.android.internal.R.layout.textview_hint,
3327                    null);
3328
3329            final float scale = getResources().getDisplayMetrics().density;
3330            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f),
3331                    (int) (50 * scale + 0.5f));
3332            mPopup.setFocusable(false);
3333            // The user is entering text, so the input method is needed.  We
3334            // don't want the popup to be displayed on top of it.
3335            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3336        }
3337
3338        TextView tv = (TextView) mPopup.getContentView();
3339        chooseSize(mPopup, mError, tv);
3340        tv.setText(mError);
3341
3342        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3343        mPopup.fixDirection(mPopup.isAboveAnchor());
3344    }
3345
3346    private static class ErrorPopup extends PopupWindow {
3347        private boolean mAbove = false;
3348        private final TextView mView;
3349
3350        ErrorPopup(TextView v, int width, int height) {
3351            super(v, width, height);
3352            mView = v;
3353        }
3354
3355        void fixDirection(boolean above) {
3356            mAbove = above;
3357
3358            if (above) {
3359                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error_above);
3360            } else {
3361                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error);
3362            }
3363        }
3364
3365        @Override
3366        public void update(int x, int y, int w, int h, boolean force) {
3367            super.update(x, y, w, h, force);
3368
3369            boolean above = isAboveAnchor();
3370            if (above != mAbove) {
3371                fixDirection(above);
3372            }
3373        }
3374    }
3375
3376    /**
3377     * Returns the Y offset to make the pointy top of the error point
3378     * at the middle of the error icon.
3379     */
3380    private int getErrorX() {
3381        /*
3382         * The "25" is the distance between the point and the right edge
3383         * of the background
3384         */
3385        final float scale = getResources().getDisplayMetrics().density;
3386
3387        final Drawables dr = mDrawables;
3388        return getWidth() - mPopup.getWidth()
3389                - getPaddingRight()
3390                - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3391    }
3392
3393    /**
3394     * Returns the Y offset to make the pointy top of the error point
3395     * at the bottom of the error icon.
3396     */
3397    private int getErrorY() {
3398        /*
3399         * Compound, not extended, because the icon is not clipped
3400         * if the text height is smaller.
3401         */
3402        int vspace = mBottom - mTop -
3403                     getCompoundPaddingBottom() - getCompoundPaddingTop();
3404
3405        final Drawables dr = mDrawables;
3406        int icontop = getCompoundPaddingTop()
3407                + (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3408
3409        /*
3410         * The "2" is the distance between the point and the top edge
3411         * of the background.
3412         */
3413
3414        return icontop + (dr != null ? dr.mDrawableHeightRight : 0)
3415                - getHeight() - 2;
3416    }
3417
3418    private void hideError() {
3419        if (mPopup != null) {
3420            if (mPopup.isShowing()) {
3421                mPopup.dismiss();
3422            }
3423        }
3424
3425        mShowErrorAfterAttach = false;
3426    }
3427
3428    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3429        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3430        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3431
3432        /*
3433         * Figure out how big the text would be if we laid it out to the
3434         * full width of this view minus the border.
3435         */
3436        int cap = getWidth() - wid;
3437        if (cap < 0) {
3438            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3439        }
3440
3441        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3442                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3443        float max = 0;
3444        for (int i = 0; i < l.getLineCount(); i++) {
3445            max = Math.max(max, l.getLineWidth(i));
3446        }
3447
3448        /*
3449         * Now set the popup size to be big enough for the text plus the border.
3450         */
3451        pop.setWidth(wid + (int) Math.ceil(max));
3452        pop.setHeight(ht + l.getHeight());
3453    }
3454
3455
3456    @Override
3457    protected boolean setFrame(int l, int t, int r, int b) {
3458        boolean result = super.setFrame(l, t, r, b);
3459
3460        if (mPopup != null) {
3461            TextView tv = (TextView) mPopup.getContentView();
3462            chooseSize(mPopup, mError, tv);
3463            mPopup.update(this, getErrorX(), getErrorY(),
3464                          mPopup.getWidth(), mPopup.getHeight());
3465        }
3466
3467        restartMarqueeIfNeeded();
3468
3469        return result;
3470    }
3471
3472    private void restartMarqueeIfNeeded() {
3473        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3474            mRestartMarquee = false;
3475            startMarquee();
3476        }
3477    }
3478
3479    /**
3480     * Sets the list of input filters that will be used if the buffer is
3481     * Editable.  Has no effect otherwise.
3482     *
3483     * @attr ref android.R.styleable#TextView_maxLength
3484     */
3485    public void setFilters(InputFilter[] filters) {
3486        if (filters == null) {
3487            throw new IllegalArgumentException();
3488        }
3489
3490        mFilters = filters;
3491
3492        if (mText instanceof Editable) {
3493            setFilters((Editable) mText, filters);
3494        }
3495    }
3496
3497    /**
3498     * Sets the list of input filters on the specified Editable,
3499     * and includes mInput in the list if it is an InputFilter.
3500     */
3501    private void setFilters(Editable e, InputFilter[] filters) {
3502        if (mInput instanceof InputFilter) {
3503            InputFilter[] nf = new InputFilter[filters.length + 1];
3504
3505            System.arraycopy(filters, 0, nf, 0, filters.length);
3506            nf[filters.length] = (InputFilter) mInput;
3507
3508            e.setFilters(nf);
3509        } else {
3510            e.setFilters(filters);
3511        }
3512    }
3513
3514    /**
3515     * Returns the current list of input filters.
3516     */
3517    public InputFilter[] getFilters() {
3518        return mFilters;
3519    }
3520
3521    /////////////////////////////////////////////////////////////////////////
3522
3523    private int getVerticalOffset(boolean forceNormal) {
3524        int voffset = 0;
3525        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3526
3527        Layout l = mLayout;
3528        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3529            l = mHintLayout;
3530        }
3531
3532        if (gravity != Gravity.TOP) {
3533            int boxht;
3534
3535            if (l == mHintLayout) {
3536                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3537                        getCompoundPaddingBottom();
3538            } else {
3539                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3540                        getExtendedPaddingBottom();
3541            }
3542            int textht = l.getHeight();
3543
3544            if (textht < boxht) {
3545                if (gravity == Gravity.BOTTOM)
3546                    voffset = boxht - textht;
3547                else // (gravity == Gravity.CENTER_VERTICAL)
3548                    voffset = (boxht - textht) >> 1;
3549            }
3550        }
3551        return voffset;
3552    }
3553
3554    private int getBottomVerticalOffset(boolean forceNormal) {
3555        int voffset = 0;
3556        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3557
3558        Layout l = mLayout;
3559        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3560            l = mHintLayout;
3561        }
3562
3563        if (gravity != Gravity.BOTTOM) {
3564            int boxht;
3565
3566            if (l == mHintLayout) {
3567                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3568                        getCompoundPaddingBottom();
3569            } else {
3570                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3571                        getExtendedPaddingBottom();
3572            }
3573            int textht = l.getHeight();
3574
3575            if (textht < boxht) {
3576                if (gravity == Gravity.TOP)
3577                    voffset = boxht - textht;
3578                else // (gravity == Gravity.CENTER_VERTICAL)
3579                    voffset = (boxht - textht) >> 1;
3580            }
3581        }
3582        return voffset;
3583    }
3584
3585    private void invalidateCursorPath() {
3586        if (mHighlightPathBogus) {
3587            invalidateCursor();
3588        } else {
3589            synchronized (sTempRect) {
3590                /*
3591                 * The reason for this concern about the thickness of the
3592                 * cursor and doing the floor/ceil on the coordinates is that
3593                 * some EditTexts (notably textfields in the Browser) have
3594                 * anti-aliased text where not all the characters are
3595                 * necessarily at integer-multiple locations.  This should
3596                 * make sure the entire cursor gets invalidated instead of
3597                 * sometimes missing half a pixel.
3598                 */
3599
3600                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3601                if (thick < 1.0f) {
3602                    thick = 1.0f;
3603                }
3604
3605                thick /= 2;
3606
3607                mHighlightPath.computeBounds(sTempRect, false);
3608
3609                int left = getCompoundPaddingLeft();
3610                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3611
3612                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3613                           (int) FloatMath.floor(top + sTempRect.top - thick),
3614                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3615                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3616            }
3617        }
3618    }
3619
3620    private void invalidateCursor() {
3621        int where = getSelectionEnd();
3622
3623        invalidateCursor(where, where, where);
3624    }
3625
3626    private void invalidateCursor(int a, int b, int c) {
3627        if (mLayout == null) {
3628            invalidate();
3629        } else {
3630            if (a >= 0 || b >= 0 || c >= 0) {
3631                int first = Math.min(Math.min(a, b), c);
3632                int last = Math.max(Math.max(a, b), c);
3633
3634                int line = mLayout.getLineForOffset(first);
3635                int top = mLayout.getLineTop(line);
3636
3637                // This is ridiculous, but the descent from the line above
3638                // can hang down into the line we really want to redraw,
3639                // so we have to invalidate part of the line above to make
3640                // sure everything that needs to be redrawn really is.
3641                // (But not the whole line above, because that would cause
3642                // the same problem with the descenders on the line above it!)
3643                if (line > 0) {
3644                    top -= mLayout.getLineDescent(line - 1);
3645                }
3646
3647                int line2;
3648
3649                if (first == last)
3650                    line2 = line;
3651                else
3652                    line2 = mLayout.getLineForOffset(last);
3653
3654                int bottom = mLayout.getLineTop(line2 + 1);
3655                int voffset = getVerticalOffset(true);
3656
3657                int left = getCompoundPaddingLeft() + mScrollX;
3658                invalidate(left, top + voffset + getExtendedPaddingTop(),
3659                           left + getWidth() - getCompoundPaddingLeft() -
3660                           getCompoundPaddingRight(),
3661                           bottom + voffset + getExtendedPaddingTop());
3662            }
3663        }
3664    }
3665
3666    private void registerForPreDraw() {
3667        final ViewTreeObserver observer = getViewTreeObserver();
3668        if (observer == null) {
3669            return;
3670        }
3671
3672        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3673            observer.addOnPreDrawListener(this);
3674            mPreDrawState = PREDRAW_PENDING;
3675        } else if (mPreDrawState == PREDRAW_DONE) {
3676            mPreDrawState = PREDRAW_PENDING;
3677        }
3678
3679        // else state is PREDRAW_PENDING, so keep waiting.
3680    }
3681
3682    /**
3683     * {@inheritDoc}
3684     */
3685    public boolean onPreDraw() {
3686        if (mPreDrawState != PREDRAW_PENDING) {
3687            return true;
3688        }
3689
3690        if (mLayout == null) {
3691            assumeLayout();
3692        }
3693
3694        boolean changed = false;
3695
3696        SelectionModifierCursorController selectionController = null;
3697        if (mSelectionModifierCursorController != null) {
3698            selectionController = (SelectionModifierCursorController)
3699                mSelectionModifierCursorController;
3700        }
3701
3702
3703        if (mMovement != null) {
3704            /* This code also provides auto-scrolling when a cursor is moved using a
3705             * CursorController (insertion point or selection limits).
3706             * For selection, ensure start or end is visible depending on controller's state.
3707             */
3708            int curs = getSelectionEnd();
3709            if (selectionController != null && selectionController.isSelectionStartDragged()) {
3710                curs = getSelectionStart();
3711            }
3712
3713            /*
3714             * TODO: This should really only keep the end in view if
3715             * it already was before the text changed.  I'm not sure
3716             * of a good way to tell from here if it was.
3717             */
3718            if (curs < 0 &&
3719                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3720                curs = mText.length();
3721            }
3722
3723            if (curs >= 0) {
3724                changed = bringPointIntoView(curs);
3725            }
3726        } else {
3727            changed = bringTextIntoView();
3728        }
3729
3730        // This has to be checked here since:
3731        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3732        //   a screen rotation) since layout is not yet initialized at that point.
3733        // - ExtractEditText does not call onFocus when it is displayed. Fixing this issue would
3734        //   allow to test for hasSelection in onFocusChanged, which would trigger a
3735        //   startTextSelectionMode here. TODO
3736        if (selectionController != null && hasSelection()) {
3737            startTextSelectionMode();
3738        }
3739
3740        mPreDrawState = PREDRAW_DONE;
3741        return !changed;
3742    }
3743
3744    @Override
3745    protected void onAttachedToWindow() {
3746        super.onAttachedToWindow();
3747
3748        mTemporaryDetach = false;
3749
3750        if (mShowErrorAfterAttach) {
3751            showError();
3752            mShowErrorAfterAttach = false;
3753        }
3754
3755        final ViewTreeObserver observer = getViewTreeObserver();
3756        if (observer != null) {
3757            if (mInsertionPointCursorController != null) {
3758                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3759            }
3760            if (mSelectionModifierCursorController != null) {
3761                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3762            }
3763        }
3764    }
3765
3766    @Override
3767    protected void onDetachedFromWindow() {
3768        super.onDetachedFromWindow();
3769
3770        final ViewTreeObserver observer = getViewTreeObserver();
3771        if (observer != null) {
3772            if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3773                observer.removeOnPreDrawListener(this);
3774                mPreDrawState = PREDRAW_NOT_REGISTERED;
3775            }
3776            if (mInsertionPointCursorController != null) {
3777                observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3778            }
3779            if (mSelectionModifierCursorController != null) {
3780                observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3781            }
3782        }
3783
3784        if (mError != null) {
3785            hideError();
3786        }
3787
3788        hideControllers();
3789    }
3790
3791    @Override
3792    protected boolean isPaddingOffsetRequired() {
3793        return mShadowRadius != 0 || mDrawables != null;
3794    }
3795
3796    @Override
3797    protected int getLeftPaddingOffset() {
3798        return getCompoundPaddingLeft() - mPaddingLeft +
3799                (int) Math.min(0, mShadowDx - mShadowRadius);
3800    }
3801
3802    @Override
3803    protected int getTopPaddingOffset() {
3804        return (int) Math.min(0, mShadowDy - mShadowRadius);
3805    }
3806
3807    @Override
3808    protected int getBottomPaddingOffset() {
3809        return (int) Math.max(0, mShadowDy + mShadowRadius);
3810    }
3811
3812    @Override
3813    protected int getRightPaddingOffset() {
3814        return -(getCompoundPaddingRight() - mPaddingRight) +
3815                (int) Math.max(0, mShadowDx + mShadowRadius);
3816    }
3817
3818    @Override
3819    protected boolean verifyDrawable(Drawable who) {
3820        final boolean verified = super.verifyDrawable(who);
3821        if (!verified && mDrawables != null) {
3822            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
3823                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
3824        }
3825        return verified;
3826    }
3827
3828    @Override
3829    public void invalidateDrawable(Drawable drawable) {
3830        if (verifyDrawable(drawable)) {
3831            final Rect dirty = drawable.getBounds();
3832            int scrollX = mScrollX;
3833            int scrollY = mScrollY;
3834
3835            // IMPORTANT: The coordinates below are based on the coordinates computed
3836            // for each compound drawable in onDraw(). Make sure to update each section
3837            // accordingly.
3838            final TextView.Drawables drawables = mDrawables;
3839            if (drawables != null) {
3840                if (drawable == drawables.mDrawableLeft) {
3841                    final int compoundPaddingTop = getCompoundPaddingTop();
3842                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3843                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3844
3845                    scrollX += mPaddingLeft;
3846                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
3847                } else if (drawable == drawables.mDrawableRight) {
3848                    final int compoundPaddingTop = getCompoundPaddingTop();
3849                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3850                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3851
3852                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
3853                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
3854                } else if (drawable == drawables.mDrawableTop) {
3855                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3856                    final int compoundPaddingRight = getCompoundPaddingRight();
3857                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3858
3859                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
3860                    scrollY += mPaddingTop;
3861                } else if (drawable == drawables.mDrawableBottom) {
3862                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3863                    final int compoundPaddingRight = getCompoundPaddingRight();
3864                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3865
3866                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
3867                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
3868                }
3869            }
3870
3871            invalidate(dirty.left + scrollX, dirty.top + scrollY,
3872                    dirty.right + scrollX, dirty.bottom + scrollY);
3873        }
3874    }
3875
3876    @Override
3877    protected void onDraw(Canvas canvas) {
3878        restartMarqueeIfNeeded();
3879
3880        // Draw the background for this view
3881        super.onDraw(canvas);
3882
3883        final int compoundPaddingLeft = getCompoundPaddingLeft();
3884        final int compoundPaddingTop = getCompoundPaddingTop();
3885        final int compoundPaddingRight = getCompoundPaddingRight();
3886        final int compoundPaddingBottom = getCompoundPaddingBottom();
3887        final int scrollX = mScrollX;
3888        final int scrollY = mScrollY;
3889        final int right = mRight;
3890        final int left = mLeft;
3891        final int bottom = mBottom;
3892        final int top = mTop;
3893
3894        final Drawables dr = mDrawables;
3895        if (dr != null) {
3896            /*
3897             * Compound, not extended, because the icon is not clipped
3898             * if the text height is smaller.
3899             */
3900
3901            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
3902            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
3903
3904            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3905            // Make sure to update invalidateDrawable() when changing this code.
3906            if (dr.mDrawableLeft != null) {
3907                canvas.save();
3908                canvas.translate(scrollX + mPaddingLeft,
3909                                 scrollY + compoundPaddingTop +
3910                                 (vspace - dr.mDrawableHeightLeft) / 2);
3911                dr.mDrawableLeft.draw(canvas);
3912                canvas.restore();
3913            }
3914
3915            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3916            // Make sure to update invalidateDrawable() when changing this code.
3917            if (dr.mDrawableRight != null) {
3918                canvas.save();
3919                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
3920                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
3921                dr.mDrawableRight.draw(canvas);
3922                canvas.restore();
3923            }
3924
3925            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3926            // Make sure to update invalidateDrawable() when changing this code.
3927            if (dr.mDrawableTop != null) {
3928                canvas.save();
3929                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
3930                        scrollY + mPaddingTop);
3931                dr.mDrawableTop.draw(canvas);
3932                canvas.restore();
3933            }
3934
3935            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3936            // Make sure to update invalidateDrawable() when changing this code.
3937            if (dr.mDrawableBottom != null) {
3938                canvas.save();
3939                canvas.translate(scrollX + compoundPaddingLeft +
3940                        (hspace - dr.mDrawableWidthBottom) / 2,
3941                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
3942                dr.mDrawableBottom.draw(canvas);
3943                canvas.restore();
3944            }
3945        }
3946
3947        if (mPreDrawState == PREDRAW_DONE) {
3948            final ViewTreeObserver observer = getViewTreeObserver();
3949            if (observer != null) {
3950                observer.removeOnPreDrawListener(this);
3951                mPreDrawState = PREDRAW_NOT_REGISTERED;
3952            }
3953        }
3954
3955        int color = mCurTextColor;
3956
3957        if (mLayout == null) {
3958            assumeLayout();
3959        }
3960
3961        Layout layout = mLayout;
3962        int cursorcolor = color;
3963
3964        if (mHint != null && mText.length() == 0) {
3965            if (mHintTextColor != null) {
3966                color = mCurHintTextColor;
3967            }
3968
3969            layout = mHintLayout;
3970        }
3971
3972        mTextPaint.setColor(color);
3973        mTextPaint.drawableState = getDrawableState();
3974
3975        canvas.save();
3976        /*  Would be faster if we didn't have to do this. Can we chop the
3977            (displayable) text so that we don't need to do this ever?
3978        */
3979
3980        int extendedPaddingTop = getExtendedPaddingTop();
3981        int extendedPaddingBottom = getExtendedPaddingBottom();
3982
3983        float clipLeft = compoundPaddingLeft + scrollX;
3984        float clipTop = extendedPaddingTop + scrollY;
3985        float clipRight = right - left - compoundPaddingRight + scrollX;
3986        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
3987
3988        if (mShadowRadius != 0) {
3989            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
3990            clipRight += Math.max(0, mShadowDx + mShadowRadius);
3991
3992            clipTop += Math.min(0, mShadowDy - mShadowRadius);
3993            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
3994        }
3995
3996        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
3997
3998        int voffsetText = 0;
3999        int voffsetCursor = 0;
4000
4001        // translate in by our padding
4002        {
4003            /* shortcircuit calling getVerticaOffset() */
4004            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4005                voffsetText = getVerticalOffset(false);
4006                voffsetCursor = getVerticalOffset(true);
4007            }
4008            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4009        }
4010
4011        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4012            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4013                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4014                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4015                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4016            }
4017
4018            if (mMarquee != null && mMarquee.isRunning()) {
4019                canvas.translate(-mMarquee.mScroll, 0.0f);
4020            }
4021        }
4022
4023        Path highlight = null;
4024        int selStart = -1, selEnd = -1;
4025
4026        //  If there is no movement method, then there can be no selection.
4027        //  Check that first and attempt to skip everything having to do with
4028        //  the cursor.
4029        //  XXX This is not strictly true -- a program could set the
4030        //  selection manually if it really wanted to.
4031        if (mMovement != null && (isFocused() || isPressed())) {
4032            selStart = getSelectionStart();
4033            selEnd = getSelectionEnd();
4034
4035            if (mCursorVisible && selStart >= 0 && isEnabled()) {
4036                if (mHighlightPath == null)
4037                    mHighlightPath = new Path();
4038
4039                if (selStart == selEnd) {
4040                    if ((SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4041                        if (mHighlightPathBogus) {
4042                            mHighlightPath.reset();
4043                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4044                            mHighlightPathBogus = false;
4045                        }
4046
4047                        // XXX should pass to skin instead of drawing directly
4048                        mHighlightPaint.setColor(cursorcolor);
4049                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4050
4051                        highlight = mHighlightPath;
4052                    }
4053                } else {
4054                    if (mHighlightPathBogus) {
4055                        mHighlightPath.reset();
4056                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4057                        mHighlightPathBogus = false;
4058                    }
4059
4060                    // XXX should pass to skin instead of drawing directly
4061                    mHighlightPaint.setColor(mHighlightColor);
4062                    mHighlightPaint.setStyle(Paint.Style.FILL);
4063
4064                    highlight = mHighlightPath;
4065                }
4066            }
4067        }
4068
4069        /*  Comment out until we decide what to do about animations
4070        boolean isLinearTextOn = false;
4071        if (currentTransformation != null) {
4072            isLinearTextOn = mTextPaint.isLinearTextOn();
4073            Matrix m = currentTransformation.getMatrix();
4074            if (!m.isIdentity()) {
4075                // mTextPaint.setLinearTextOn(true);
4076            }
4077        }
4078        */
4079
4080        final InputMethodState ims = mInputMethodState;
4081        if (ims != null && ims.mBatchEditNesting == 0) {
4082            InputMethodManager imm = InputMethodManager.peekInstance();
4083            if (imm != null) {
4084                if (imm.isActive(this)) {
4085                    boolean reported = false;
4086                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4087                        // We are in extract mode and the content has changed
4088                        // in some way... just report complete new text to the
4089                        // input method.
4090                        reported = reportExtractedText();
4091                    }
4092                    if (!reported && highlight != null) {
4093                        int candStart = -1;
4094                        int candEnd = -1;
4095                        if (mText instanceof Spannable) {
4096                            Spannable sp = (Spannable)mText;
4097                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4098                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4099                        }
4100                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4101                    }
4102                }
4103
4104                if (imm.isWatchingCursor(this) && highlight != null) {
4105                    highlight.computeBounds(ims.mTmpRectF, true);
4106                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4107
4108                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4109                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4110
4111                    ims.mTmpRectF.offset(0, voffsetCursor - voffsetText);
4112
4113                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4114                            (int)(ims.mTmpRectF.top + 0.5),
4115                            (int)(ims.mTmpRectF.right + 0.5),
4116                            (int)(ims.mTmpRectF.bottom + 0.5));
4117
4118                    imm.updateCursor(this,
4119                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4120                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4121                }
4122            }
4123        }
4124
4125        layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4126
4127        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4128            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4129            layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4130        }
4131
4132        /*  Comment out until we decide what to do about animations
4133        if (currentTransformation != null) {
4134            mTextPaint.setLinearTextOn(isLinearTextOn);
4135        }
4136        */
4137
4138        canvas.restore();
4139
4140        if (mInsertionPointCursorController != null &&
4141                mInsertionPointCursorController.isShowing()) {
4142            mInsertionPointCursorController.updatePosition();
4143        }
4144        if (mSelectionModifierCursorController != null &&
4145                mSelectionModifierCursorController.isShowing()) {
4146            mSelectionModifierCursorController.updatePosition();
4147        }
4148    }
4149
4150    @Override
4151    public void getFocusedRect(Rect r) {
4152        if (mLayout == null) {
4153            super.getFocusedRect(r);
4154            return;
4155        }
4156
4157        int sel = getSelectionEnd();
4158        if (sel < 0) {
4159            super.getFocusedRect(r);
4160            return;
4161        }
4162
4163        int line = mLayout.getLineForOffset(sel);
4164        r.top = mLayout.getLineTop(line);
4165        r.bottom = mLayout.getLineBottom(line);
4166
4167        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4168        r.right = r.left + 1;
4169
4170        // Adjust for padding and gravity.
4171        int paddingLeft = getCompoundPaddingLeft();
4172        int paddingTop = getExtendedPaddingTop();
4173        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4174            paddingTop += getVerticalOffset(false);
4175        }
4176        r.offset(paddingLeft, paddingTop);
4177    }
4178
4179    /**
4180     * Return the number of lines of text, or 0 if the internal Layout has not
4181     * been built.
4182     */
4183    public int getLineCount() {
4184        return mLayout != null ? mLayout.getLineCount() : 0;
4185    }
4186
4187    /**
4188     * Return the baseline for the specified line (0...getLineCount() - 1)
4189     * If bounds is not null, return the top, left, right, bottom extents
4190     * of the specified line in it. If the internal Layout has not been built,
4191     * return 0 and set bounds to (0, 0, 0, 0)
4192     * @param line which line to examine (0..getLineCount() - 1)
4193     * @param bounds Optional. If not null, it returns the extent of the line
4194     * @return the Y-coordinate of the baseline
4195     */
4196    public int getLineBounds(int line, Rect bounds) {
4197        if (mLayout == null) {
4198            if (bounds != null) {
4199                bounds.set(0, 0, 0, 0);
4200            }
4201            return 0;
4202        }
4203        else {
4204            int baseline = mLayout.getLineBounds(line, bounds);
4205
4206            int voffset = getExtendedPaddingTop();
4207            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4208                voffset += getVerticalOffset(true);
4209            }
4210            if (bounds != null) {
4211                bounds.offset(getCompoundPaddingLeft(), voffset);
4212            }
4213            return baseline + voffset;
4214        }
4215    }
4216
4217    @Override
4218    public int getBaseline() {
4219        if (mLayout == null) {
4220            return super.getBaseline();
4221        }
4222
4223        int voffset = 0;
4224        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4225            voffset = getVerticalOffset(true);
4226        }
4227
4228        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4229    }
4230
4231    @Override
4232    public boolean onKeyDown(int keyCode, KeyEvent event) {
4233        int which = doKeyDown(keyCode, event, null);
4234        if (which == 0) {
4235            // Go through default dispatching.
4236            return super.onKeyDown(keyCode, event);
4237        }
4238
4239        return true;
4240    }
4241
4242    @Override
4243    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4244        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4245
4246        int which = doKeyDown(keyCode, down, event);
4247        if (which == 0) {
4248            // Go through default dispatching.
4249            return super.onKeyMultiple(keyCode, repeatCount, event);
4250        }
4251        if (which == -1) {
4252            // Consumed the whole thing.
4253            return true;
4254        }
4255
4256        repeatCount--;
4257
4258        // We are going to dispatch the remaining events to either the input
4259        // or movement method.  To do this, we will just send a repeated stream
4260        // of down and up events until we have done the complete repeatCount.
4261        // It would be nice if those interfaces had an onKeyMultiple() method,
4262        // but adding that is a more complicated change.
4263        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4264        if (which == 1) {
4265            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4266            while (--repeatCount > 0) {
4267                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4268                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4269            }
4270            if (mError != null && !mErrorWasChanged) {
4271                setError(null, null);
4272            }
4273
4274        } else if (which == 2) {
4275            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4276            while (--repeatCount > 0) {
4277                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4278                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4279            }
4280        }
4281
4282        return true;
4283    }
4284
4285    /**
4286     * Returns true if pressing ENTER in this field advances focus instead
4287     * of inserting the character.  This is true mostly in single-line fields,
4288     * but also in mail addresses and subjects which will display on multiple
4289     * lines but where it doesn't make sense to insert newlines.
4290     */
4291    private boolean shouldAdvanceFocusOnEnter() {
4292        if (mInput == null) {
4293            return false;
4294        }
4295
4296        if (mSingleLine) {
4297            return true;
4298        }
4299
4300        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4301            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4302
4303            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
4304                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4305                return true;
4306            }
4307        }
4308
4309        return false;
4310    }
4311
4312    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4313        if (!isEnabled()) {
4314            return 0;
4315        }
4316
4317        switch (keyCode) {
4318            case KeyEvent.KEYCODE_ENTER:
4319                // If ALT modifier is held, then we always insert a
4320                // newline character.
4321                if ((event.getMetaState()&KeyEvent.META_ALT_ON) == 0) {
4322
4323                    // When mInputContentType is set, we know that we are
4324                    // running in a "modern" cupcake environment, so don't need
4325                    // to worry about the application trying to capture
4326                    // enter key events.
4327                    if (mInputContentType != null) {
4328
4329                        // If there is an action listener, given them a
4330                        // chance to consume the event.
4331                        if (mInputContentType.onEditorActionListener != null &&
4332                                mInputContentType.onEditorActionListener.onEditorAction(
4333                                this, EditorInfo.IME_NULL, event)) {
4334                            mInputContentType.enterDown = true;
4335                            // We are consuming the enter key for them.
4336                            return -1;
4337                        }
4338                    }
4339
4340                    // If our editor should move focus when enter is pressed, or
4341                    // this is a generated event from an IME action button, then
4342                    // don't let it be inserted into the text.
4343                    if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4344                            || shouldAdvanceFocusOnEnter()) {
4345                        return -1;
4346                    }
4347                }
4348                break;
4349
4350            case KeyEvent.KEYCODE_DPAD_CENTER:
4351                if (shouldAdvanceFocusOnEnter()) {
4352                    return 0;
4353                }
4354                break;
4355
4356                // Has to be done on key down (and not on key up) to correctly be intercepted.
4357            case KeyEvent.KEYCODE_BACK:
4358                if (mIsInTextSelectionMode) {
4359                    stopTextSelectionMode();
4360                    return -1;
4361                }
4362                break;
4363        }
4364
4365        if (mInput != null) {
4366            /*
4367             * Keep track of what the error was before doing the input
4368             * so that if an input filter changed the error, we leave
4369             * that error showing.  Otherwise, we take down whatever
4370             * error was showing when the user types something.
4371             */
4372            mErrorWasChanged = false;
4373
4374            boolean doDown = true;
4375            if (otherEvent != null) {
4376                try {
4377                    beginBatchEdit();
4378                    boolean handled = mInput.onKeyOther(this, (Editable) mText,
4379                            otherEvent);
4380                    if (mError != null && !mErrorWasChanged) {
4381                        setError(null, null);
4382                    }
4383                    doDown = false;
4384                    if (handled) {
4385                        return -1;
4386                    }
4387                } catch (AbstractMethodError e) {
4388                    // onKeyOther was added after 1.0, so if it isn't
4389                    // implemented we need to try to dispatch as a regular down.
4390                } finally {
4391                    endBatchEdit();
4392                }
4393            }
4394
4395            if (doDown) {
4396                beginBatchEdit();
4397                if (mInput.onKeyDown(this, (Editable) mText, keyCode, event)) {
4398                    endBatchEdit();
4399                    if (mError != null && !mErrorWasChanged) {
4400                        setError(null, null);
4401                    }
4402                    return 1;
4403                }
4404                endBatchEdit();
4405            }
4406        }
4407
4408        // bug 650865: sometimes we get a key event before a layout.
4409        // don't try to move around if we don't know the layout.
4410
4411        if (mMovement != null && mLayout != null) {
4412            boolean doDown = true;
4413            if (otherEvent != null) {
4414                try {
4415                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4416                            otherEvent);
4417                    doDown = false;
4418                    if (handled) {
4419                        return -1;
4420                    }
4421                } catch (AbstractMethodError e) {
4422                    // onKeyOther was added after 1.0, so if it isn't
4423                    // implemented we need to try to dispatch as a regular down.
4424                }
4425            }
4426            if (doDown) {
4427                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4428                    return 2;
4429            }
4430        }
4431
4432        return 0;
4433    }
4434
4435    @Override
4436    public boolean onKeyUp(int keyCode, KeyEvent event) {
4437        if (!isEnabled()) {
4438            return super.onKeyUp(keyCode, event);
4439        }
4440
4441        hideControllers();
4442
4443        switch (keyCode) {
4444            case KeyEvent.KEYCODE_DPAD_CENTER:
4445                /*
4446                 * If there is a click listener, just call through to
4447                 * super, which will invoke it.
4448                 *
4449                 * If there isn't a click listener, try to show the soft
4450                 * input method.  (It will also
4451                 * call performClick(), but that won't do anything in
4452                 * this case.)
4453                 */
4454                if (mOnClickListener == null) {
4455                    if (mMovement != null && mText instanceof Editable
4456                            && mLayout != null && onCheckIsTextEditor()) {
4457                        InputMethodManager imm = (InputMethodManager)
4458                                getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
4459                        imm.showSoftInput(this, 0);
4460                    }
4461                }
4462                return super.onKeyUp(keyCode, event);
4463
4464            case KeyEvent.KEYCODE_ENTER:
4465                if (mInputContentType != null
4466                        && mInputContentType.onEditorActionListener != null
4467                        && mInputContentType.enterDown) {
4468                    mInputContentType.enterDown = false;
4469                    if (mInputContentType.onEditorActionListener.onEditorAction(
4470                            this, EditorInfo.IME_NULL, event)) {
4471                        return true;
4472                    }
4473                }
4474
4475                if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4476                        || shouldAdvanceFocusOnEnter()) {
4477                    /*
4478                     * If there is a click listener, just call through to
4479                     * super, which will invoke it.
4480                     *
4481                     * If there isn't a click listener, try to advance focus,
4482                     * but still call through to super, which will reset the
4483                     * pressed state and longpress state.  (It will also
4484                     * call performClick(), but that won't do anything in
4485                     * this case.)
4486                     */
4487                    if (mOnClickListener == null) {
4488                        View v = focusSearch(FOCUS_DOWN);
4489
4490                        if (v != null) {
4491                            if (!v.requestFocus(FOCUS_DOWN)) {
4492                                throw new IllegalStateException("focus search returned a view " +
4493                                        "that wasn't able to take focus!");
4494                            }
4495
4496                            /*
4497                             * Return true because we handled the key; super
4498                             * will return false because there was no click
4499                             * listener.
4500                             */
4501                            super.onKeyUp(keyCode, event);
4502                            return true;
4503                        } else if ((event.getFlags()
4504                                & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4505                            // No target for next focus, but make sure the IME
4506                            // if this came from it.
4507                            InputMethodManager imm = InputMethodManager.peekInstance();
4508                            if (imm != null) {
4509                                imm.hideSoftInputFromWindow(getWindowToken(), 0);
4510                            }
4511                        }
4512                    }
4513
4514                    return super.onKeyUp(keyCode, event);
4515                }
4516                break;
4517        }
4518
4519        if (mInput != null)
4520            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4521                return true;
4522
4523        if (mMovement != null && mLayout != null)
4524            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4525                return true;
4526
4527        return super.onKeyUp(keyCode, event);
4528    }
4529
4530    @Override public boolean onCheckIsTextEditor() {
4531        return mInputType != EditorInfo.TYPE_NULL;
4532    }
4533
4534    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4535        if (onCheckIsTextEditor()) {
4536            if (mInputMethodState == null) {
4537                mInputMethodState = new InputMethodState();
4538            }
4539            outAttrs.inputType = mInputType;
4540            if (mInputContentType != null) {
4541                outAttrs.imeOptions = mInputContentType.imeOptions;
4542                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4543                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4544                outAttrs.actionId = mInputContentType.imeActionId;
4545                outAttrs.extras = mInputContentType.extras;
4546            } else {
4547                outAttrs.imeOptions = EditorInfo.IME_NULL;
4548            }
4549            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4550                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4551                if (focusSearch(FOCUS_DOWN) != null) {
4552                    // An action has not been set, but the enter key will move to
4553                    // the next focus, so set the action to that.
4554                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4555                } else {
4556                    // An action has not been set, and there is no focus to move
4557                    // to, so let's just supply a "done" action.
4558                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4559                }
4560                if (!shouldAdvanceFocusOnEnter()) {
4561                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4562                }
4563            }
4564            if ((outAttrs.inputType & (InputType.TYPE_MASK_CLASS
4565                    | InputType.TYPE_TEXT_FLAG_MULTI_LINE))
4566                    == (InputType.TYPE_CLASS_TEXT
4567                            | InputType.TYPE_TEXT_FLAG_MULTI_LINE)) {
4568                // Multi-line text editors should always show an enter key.
4569                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4570            }
4571            outAttrs.hintText = mHint;
4572            if (mText instanceof Editable) {
4573                InputConnection ic = new EditableInputConnection(this);
4574                outAttrs.initialSelStart = getSelectionStart();
4575                outAttrs.initialSelEnd = getSelectionEnd();
4576                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4577                return ic;
4578            }
4579        }
4580        return null;
4581    }
4582
4583    /**
4584     * If this TextView contains editable content, extract a portion of it
4585     * based on the information in <var>request</var> in to <var>outText</var>.
4586     * @return Returns true if the text was successfully extracted, else false.
4587     */
4588    public boolean extractText(ExtractedTextRequest request,
4589            ExtractedText outText) {
4590        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4591                EXTRACT_UNKNOWN, outText);
4592    }
4593
4594    static final int EXTRACT_NOTHING = -2;
4595    static final int EXTRACT_UNKNOWN = -1;
4596
4597    boolean extractTextInternal(ExtractedTextRequest request,
4598            int partialStartOffset, int partialEndOffset, int delta,
4599            ExtractedText outText) {
4600        final CharSequence content = mText;
4601        if (content != null) {
4602            if (partialStartOffset != EXTRACT_NOTHING) {
4603                final int N = content.length();
4604                if (partialStartOffset < 0) {
4605                    outText.partialStartOffset = outText.partialEndOffset = -1;
4606                    partialStartOffset = 0;
4607                    partialEndOffset = N;
4608                } else {
4609                    // Now use the delta to determine the actual amount of text
4610                    // we need.
4611                    partialEndOffset += delta;
4612                    // Adjust offsets to ensure we contain full spans.
4613                    if (content instanceof Spanned) {
4614                        Spanned spanned = (Spanned)content;
4615                        Object[] spans = spanned.getSpans(partialStartOffset,
4616                                partialEndOffset, ParcelableSpan.class);
4617                        int i = spans.length;
4618                        while (i > 0) {
4619                            i--;
4620                            int j = spanned.getSpanStart(spans[i]);
4621                            if (j < partialStartOffset) partialStartOffset = j;
4622                            j = spanned.getSpanEnd(spans[i]);
4623                            if (j > partialEndOffset) partialEndOffset = j;
4624                        }
4625                    }
4626                    outText.partialStartOffset = partialStartOffset;
4627                    outText.partialEndOffset = partialEndOffset - delta;
4628
4629                    if (partialStartOffset > N) {
4630                        partialStartOffset = N;
4631                    } else if (partialStartOffset < 0) {
4632                        partialStartOffset = 0;
4633                    }
4634                    if (partialEndOffset > N) {
4635                        partialEndOffset = N;
4636                    } else if (partialEndOffset < 0) {
4637                        partialEndOffset = 0;
4638                    }
4639                }
4640                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
4641                    outText.text = content.subSequence(partialStartOffset,
4642                            partialEndOffset);
4643                } else {
4644                    outText.text = TextUtils.substring(content, partialStartOffset,
4645                            partialEndOffset);
4646                }
4647            } else {
4648                outText.partialStartOffset = 0;
4649                outText.partialEndOffset = 0;
4650                outText.text = "";
4651            }
4652            outText.flags = 0;
4653            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
4654                outText.flags |= ExtractedText.FLAG_SELECTING;
4655            }
4656            if (mSingleLine) {
4657                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
4658            }
4659            outText.startOffset = 0;
4660            outText.selectionStart = getSelectionStart();
4661            outText.selectionEnd = getSelectionEnd();
4662            return true;
4663        }
4664        return false;
4665    }
4666
4667    boolean reportExtractedText() {
4668        final InputMethodState ims = mInputMethodState;
4669        if (ims != null) {
4670            final boolean contentChanged = ims.mContentChanged;
4671            if (contentChanged || ims.mSelectionModeChanged) {
4672                ims.mContentChanged = false;
4673                ims.mSelectionModeChanged = false;
4674                final ExtractedTextRequest req = mInputMethodState.mExtracting;
4675                if (req != null) {
4676                    InputMethodManager imm = InputMethodManager.peekInstance();
4677                    if (imm != null) {
4678                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
4679                                + ims.mChangedStart + " end=" + ims.mChangedEnd
4680                                + " delta=" + ims.mChangedDelta);
4681                        if (ims.mChangedStart < 0 && !contentChanged) {
4682                            ims.mChangedStart = EXTRACT_NOTHING;
4683                        }
4684                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
4685                                ims.mChangedDelta, ims.mTmpExtracted)) {
4686                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
4687                                    + ims.mTmpExtracted.partialStartOffset
4688                                    + " end=" + ims.mTmpExtracted.partialEndOffset
4689                                    + ": " + ims.mTmpExtracted.text);
4690                            imm.updateExtractedText(this, req.token,
4691                                    mInputMethodState.mTmpExtracted);
4692                            ims.mChangedStart = EXTRACT_UNKNOWN;
4693                            ims.mChangedEnd = EXTRACT_UNKNOWN;
4694                            ims.mChangedDelta = 0;
4695                            ims.mContentChanged = false;
4696                            return true;
4697                        }
4698                    }
4699                }
4700            }
4701        }
4702        return false;
4703    }
4704
4705    /**
4706     * This is used to remove all style-impacting spans from text before new
4707     * extracted text is being replaced into it, so that we don't have any
4708     * lingering spans applied during the replace.
4709     */
4710    static void removeParcelableSpans(Spannable spannable, int start, int end) {
4711        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
4712        int i = spans.length;
4713        while (i > 0) {
4714            i--;
4715            spannable.removeSpan(spans[i]);
4716        }
4717    }
4718
4719    /**
4720     * Apply to this text view the given extracted text, as previously
4721     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
4722     */
4723    public void setExtractedText(ExtractedText text) {
4724        Editable content = getEditableText();
4725        if (text.text != null) {
4726            if (content == null) {
4727                setText(text.text, TextView.BufferType.EDITABLE);
4728            } else if (text.partialStartOffset < 0) {
4729                removeParcelableSpans(content, 0, content.length());
4730                content.replace(0, content.length(), text.text);
4731            } else {
4732                final int N = content.length();
4733                int start = text.partialStartOffset;
4734                if (start > N) start = N;
4735                int end = text.partialEndOffset;
4736                if (end > N) end = N;
4737                removeParcelableSpans(content, start, end);
4738                content.replace(start, end, text.text);
4739            }
4740        }
4741
4742        // Now set the selection position...  make sure it is in range, to
4743        // avoid crashes.  If this is a partial update, it is possible that
4744        // the underlying text may have changed, causing us problems here.
4745        // Also we just don't want to trust clients to do the right thing.
4746        Spannable sp = (Spannable)getText();
4747        final int N = sp.length();
4748        int start = text.selectionStart;
4749        if (start < 0) start = 0;
4750        else if (start > N) start = N;
4751        int end = text.selectionEnd;
4752        if (end < 0) end = 0;
4753        else if (end > N) end = N;
4754        Selection.setSelection(sp, start, end);
4755
4756        // Finally, update the selection mode.
4757        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
4758            MetaKeyKeyListener.startSelecting(this, sp);
4759        } else {
4760            MetaKeyKeyListener.stopSelecting(this, sp);
4761        }
4762    }
4763
4764    /**
4765     * @hide
4766     */
4767    public void setExtracting(ExtractedTextRequest req) {
4768        if (mInputMethodState != null) {
4769            mInputMethodState.mExtracting = req;
4770        }
4771        hideControllers();
4772    }
4773
4774    /**
4775     * Called by the framework in response to a text completion from
4776     * the current input method, provided by it calling
4777     * {@link InputConnection#commitCompletion
4778     * InputConnection.commitCompletion()}.  The default implementation does
4779     * nothing; text views that are supporting auto-completion should override
4780     * this to do their desired behavior.
4781     *
4782     * @param text The auto complete text the user has selected.
4783     */
4784    public void onCommitCompletion(CompletionInfo text) {
4785    }
4786
4787    public void beginBatchEdit() {
4788        final InputMethodState ims = mInputMethodState;
4789        if (ims != null) {
4790            int nesting = ++ims.mBatchEditNesting;
4791            if (nesting == 1) {
4792                ims.mCursorChanged = false;
4793                ims.mChangedDelta = 0;
4794                if (ims.mContentChanged) {
4795                    // We already have a pending change from somewhere else,
4796                    // so turn this into a full update.
4797                    ims.mChangedStart = 0;
4798                    ims.mChangedEnd = mText.length();
4799                } else {
4800                    ims.mChangedStart = EXTRACT_UNKNOWN;
4801                    ims.mChangedEnd = EXTRACT_UNKNOWN;
4802                    ims.mContentChanged = false;
4803                }
4804                onBeginBatchEdit();
4805            }
4806        }
4807    }
4808
4809    public void endBatchEdit() {
4810        final InputMethodState ims = mInputMethodState;
4811        if (ims != null) {
4812            int nesting = --ims.mBatchEditNesting;
4813            if (nesting == 0) {
4814                finishBatchEdit(ims);
4815            }
4816        }
4817    }
4818
4819    void ensureEndedBatchEdit() {
4820        final InputMethodState ims = mInputMethodState;
4821        if (ims != null && ims.mBatchEditNesting != 0) {
4822            ims.mBatchEditNesting = 0;
4823            finishBatchEdit(ims);
4824        }
4825    }
4826
4827    void finishBatchEdit(final InputMethodState ims) {
4828        onEndBatchEdit();
4829
4830        if (ims.mContentChanged || ims.mSelectionModeChanged) {
4831            updateAfterEdit();
4832            reportExtractedText();
4833        } else if (ims.mCursorChanged) {
4834            // Cheezy way to get us to report the current cursor location.
4835            invalidateCursor();
4836        }
4837    }
4838
4839    void updateAfterEdit() {
4840        invalidate();
4841        int curs = getSelectionStart();
4842
4843        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
4844                             Gravity.BOTTOM) {
4845            registerForPreDraw();
4846        }
4847
4848        if (curs >= 0) {
4849            mHighlightPathBogus = true;
4850
4851            if (isFocused()) {
4852                mShowCursor = SystemClock.uptimeMillis();
4853                makeBlink();
4854            }
4855        }
4856
4857        checkForResize();
4858    }
4859
4860    /**
4861     * Called by the framework in response to a request to begin a batch
4862     * of edit operations through a call to link {@link #beginBatchEdit()}.
4863     */
4864    public void onBeginBatchEdit() {
4865    }
4866
4867    /**
4868     * Called by the framework in response to a request to end a batch
4869     * of edit operations through a call to link {@link #endBatchEdit}.
4870     */
4871    public void onEndBatchEdit() {
4872    }
4873
4874    /**
4875     * Called by the framework in response to a private command from the
4876     * current method, provided by it calling
4877     * {@link InputConnection#performPrivateCommand
4878     * InputConnection.performPrivateCommand()}.
4879     *
4880     * @param action The action name of the command.
4881     * @param data Any additional data for the command.  This may be null.
4882     * @return Return true if you handled the command, else false.
4883     */
4884    public boolean onPrivateIMECommand(String action, Bundle data) {
4885        return false;
4886    }
4887
4888    private void nullLayouts() {
4889        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
4890            mSavedLayout = (BoringLayout) mLayout;
4891        }
4892        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
4893            mSavedHintLayout = (BoringLayout) mHintLayout;
4894        }
4895
4896        mLayout = mHintLayout = null;
4897    }
4898
4899    /**
4900     * Make a new Layout based on the already-measured size of the view,
4901     * on the assumption that it was measured correctly at some point.
4902     */
4903    private void assumeLayout() {
4904        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
4905
4906        if (width < 1) {
4907            width = 0;
4908        }
4909
4910        int physicalWidth = width;
4911
4912        if (mHorizontallyScrolling) {
4913            width = VERY_WIDE;
4914        }
4915
4916        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
4917                      physicalWidth, false);
4918    }
4919
4920    /**
4921     * The width passed in is now the desired layout width,
4922     * not the full view width with padding.
4923     * {@hide}
4924     */
4925    protected void makeNewLayout(int w, int hintWidth,
4926                                 BoringLayout.Metrics boring,
4927                                 BoringLayout.Metrics hintBoring,
4928                                 int ellipsisWidth, boolean bringIntoView) {
4929        stopMarquee();
4930
4931        mHighlightPathBogus = true;
4932
4933        if (w < 0) {
4934            w = 0;
4935        }
4936        if (hintWidth < 0) {
4937            hintWidth = 0;
4938        }
4939
4940        Layout.Alignment alignment;
4941        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
4942            case Gravity.CENTER_HORIZONTAL:
4943                alignment = Layout.Alignment.ALIGN_CENTER;
4944                break;
4945
4946            case Gravity.RIGHT:
4947                alignment = Layout.Alignment.ALIGN_OPPOSITE;
4948                break;
4949
4950            default:
4951                alignment = Layout.Alignment.ALIGN_NORMAL;
4952        }
4953
4954        boolean shouldEllipsize = mEllipsize != null && mInput == null;
4955
4956        if (mText instanceof Spannable) {
4957            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
4958                    alignment, mSpacingMult,
4959                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
4960                    ellipsisWidth);
4961        } else {
4962            if (boring == UNKNOWN_BORING) {
4963                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
4964                                               mBoring);
4965                if (boring != null) {
4966                    mBoring = boring;
4967                }
4968            }
4969
4970            if (boring != null) {
4971                if (boring.width <= w &&
4972                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
4973                    if (mSavedLayout != null) {
4974                        mLayout = mSavedLayout.
4975                                replaceOrMake(mTransformed, mTextPaint,
4976                                w, alignment, mSpacingMult, mSpacingAdd,
4977                                boring, mIncludePad);
4978                    } else {
4979                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4980                                w, alignment, mSpacingMult, mSpacingAdd,
4981                                boring, mIncludePad);
4982                    }
4983
4984                    mSavedLayout = (BoringLayout) mLayout;
4985                } else if (shouldEllipsize && boring.width <= w) {
4986                    if (mSavedLayout != null) {
4987                        mLayout = mSavedLayout.
4988                                replaceOrMake(mTransformed, mTextPaint,
4989                                w, alignment, mSpacingMult, mSpacingAdd,
4990                                boring, mIncludePad, mEllipsize,
4991                                ellipsisWidth);
4992                    } else {
4993                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4994                                w, alignment, mSpacingMult, mSpacingAdd,
4995                                boring, mIncludePad, mEllipsize,
4996                                ellipsisWidth);
4997                    }
4998                } else if (shouldEllipsize) {
4999                    mLayout = new StaticLayout(mTransformed,
5000                                0, mTransformed.length(),
5001                                mTextPaint, w, alignment, mSpacingMult,
5002                                mSpacingAdd, mIncludePad, mEllipsize,
5003                                ellipsisWidth);
5004                } else {
5005                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5006                            w, alignment, mSpacingMult, mSpacingAdd,
5007                            mIncludePad);
5008                }
5009            } else if (shouldEllipsize) {
5010                mLayout = new StaticLayout(mTransformed,
5011                            0, mTransformed.length(),
5012                            mTextPaint, w, alignment, mSpacingMult,
5013                            mSpacingAdd, mIncludePad, mEllipsize,
5014                            ellipsisWidth);
5015            } else {
5016                mLayout = new StaticLayout(mTransformed, mTextPaint,
5017                        w, alignment, mSpacingMult, mSpacingAdd,
5018                        mIncludePad);
5019            }
5020        }
5021
5022        shouldEllipsize = mEllipsize != null;
5023        mHintLayout = null;
5024
5025        if (mHint != null) {
5026            if (shouldEllipsize) hintWidth = w;
5027
5028            if (hintBoring == UNKNOWN_BORING) {
5029                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5030                                                   mHintBoring);
5031                if (hintBoring != null) {
5032                    mHintBoring = hintBoring;
5033                }
5034            }
5035
5036            if (hintBoring != null) {
5037                if (hintBoring.width <= hintWidth &&
5038                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5039                    if (mSavedHintLayout != null) {
5040                        mHintLayout = mSavedHintLayout.
5041                                replaceOrMake(mHint, mTextPaint,
5042                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5043                                hintBoring, mIncludePad);
5044                    } else {
5045                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5046                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5047                                hintBoring, mIncludePad);
5048                    }
5049
5050                    mSavedHintLayout = (BoringLayout) mHintLayout;
5051                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5052                    if (mSavedHintLayout != null) {
5053                        mHintLayout = mSavedHintLayout.
5054                                replaceOrMake(mHint, mTextPaint,
5055                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5056                                hintBoring, mIncludePad, mEllipsize,
5057                                ellipsisWidth);
5058                    } else {
5059                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5060                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5061                                hintBoring, mIncludePad, mEllipsize,
5062                                ellipsisWidth);
5063                    }
5064                } else if (shouldEllipsize) {
5065                    mHintLayout = new StaticLayout(mHint,
5066                                0, mHint.length(),
5067                                mTextPaint, hintWidth, alignment, mSpacingMult,
5068                                mSpacingAdd, mIncludePad, mEllipsize,
5069                                ellipsisWidth);
5070                } else {
5071                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5072                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5073                            mIncludePad);
5074                }
5075            } else if (shouldEllipsize) {
5076                mHintLayout = new StaticLayout(mHint,
5077                            0, mHint.length(),
5078                            mTextPaint, hintWidth, alignment, mSpacingMult,
5079                            mSpacingAdd, mIncludePad, mEllipsize,
5080                            ellipsisWidth);
5081            } else {
5082                mHintLayout = new StaticLayout(mHint, mTextPaint,
5083                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5084                        mIncludePad);
5085            }
5086        }
5087
5088        if (bringIntoView) {
5089            registerForPreDraw();
5090        }
5091
5092        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5093            if (!compressText(ellipsisWidth)) {
5094                final int height = mLayoutParams.height;
5095                // If the size of the view does not depend on the size of the text, try to
5096                // start the marquee immediately
5097                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5098                    startMarquee();
5099                } else {
5100                    // Defer the start of the marquee until we know our width (see setFrame())
5101                    mRestartMarquee = true;
5102                }
5103            }
5104        }
5105
5106        // CursorControllers need a non-null mLayout
5107        prepareCursorControllers();
5108    }
5109
5110    private boolean compressText(float width) {
5111        // Only compress the text if it hasn't been compressed by the previous pass
5112        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5113                mTextPaint.getTextScaleX() == 1.0f) {
5114            final float textWidth = mLayout.getLineWidth(0);
5115            final float overflow = (textWidth + 1.0f - width) / width;
5116            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5117                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5118                post(new Runnable() {
5119                    public void run() {
5120                        requestLayout();
5121                    }
5122                });
5123                return true;
5124            }
5125        }
5126
5127        return false;
5128    }
5129
5130    private static int desired(Layout layout) {
5131        int n = layout.getLineCount();
5132        CharSequence text = layout.getText();
5133        float max = 0;
5134
5135        // if any line was wrapped, we can't use it.
5136        // but it's ok for the last line not to have a newline
5137
5138        for (int i = 0; i < n - 1; i++) {
5139            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5140                return -1;
5141        }
5142
5143        for (int i = 0; i < n; i++) {
5144            max = Math.max(max, layout.getLineWidth(i));
5145        }
5146
5147        return (int) FloatMath.ceil(max);
5148    }
5149
5150    /**
5151     * Set whether the TextView includes extra top and bottom padding to make
5152     * room for accents that go above the normal ascent and descent.
5153     * The default is true.
5154     *
5155     * @attr ref android.R.styleable#TextView_includeFontPadding
5156     */
5157    public void setIncludeFontPadding(boolean includepad) {
5158        mIncludePad = includepad;
5159
5160        if (mLayout != null) {
5161            nullLayouts();
5162            requestLayout();
5163            invalidate();
5164        }
5165    }
5166
5167    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5168
5169    @Override
5170    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5171        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5172        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5173        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5174        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5175
5176        int width;
5177        int height;
5178
5179        BoringLayout.Metrics boring = UNKNOWN_BORING;
5180        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5181
5182        int des = -1;
5183        boolean fromexisting = false;
5184
5185        if (widthMode == MeasureSpec.EXACTLY) {
5186            // Parent has told us how big to be. So be it.
5187            width = widthSize;
5188        } else {
5189            if (mLayout != null && mEllipsize == null) {
5190                des = desired(mLayout);
5191            }
5192
5193            if (des < 0) {
5194                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5195                if (boring != null) {
5196                    mBoring = boring;
5197                }
5198            } else {
5199                fromexisting = true;
5200            }
5201
5202            if (boring == null || boring == UNKNOWN_BORING) {
5203                if (des < 0) {
5204                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5205                }
5206
5207                width = des;
5208            } else {
5209                width = boring.width;
5210            }
5211
5212            final Drawables dr = mDrawables;
5213            if (dr != null) {
5214                width = Math.max(width, dr.mDrawableWidthTop);
5215                width = Math.max(width, dr.mDrawableWidthBottom);
5216            }
5217
5218            if (mHint != null) {
5219                int hintDes = -1;
5220                int hintWidth;
5221
5222                if (mHintLayout != null && mEllipsize == null) {
5223                    hintDes = desired(mHintLayout);
5224                }
5225
5226                if (hintDes < 0) {
5227                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5228                    if (hintBoring != null) {
5229                        mHintBoring = hintBoring;
5230                    }
5231                }
5232
5233                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5234                    if (hintDes < 0) {
5235                        hintDes = (int) FloatMath.ceil(
5236                                Layout.getDesiredWidth(mHint, mTextPaint));
5237                    }
5238
5239                    hintWidth = hintDes;
5240                } else {
5241                    hintWidth = hintBoring.width;
5242                }
5243
5244                if (hintWidth > width) {
5245                    width = hintWidth;
5246                }
5247            }
5248
5249            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5250
5251            if (mMaxWidthMode == EMS) {
5252                width = Math.min(width, mMaxWidth * getLineHeight());
5253            } else {
5254                width = Math.min(width, mMaxWidth);
5255            }
5256
5257            if (mMinWidthMode == EMS) {
5258                width = Math.max(width, mMinWidth * getLineHeight());
5259            } else {
5260                width = Math.max(width, mMinWidth);
5261            }
5262
5263            // Check against our minimum width
5264            width = Math.max(width, getSuggestedMinimumWidth());
5265
5266            if (widthMode == MeasureSpec.AT_MOST) {
5267                width = Math.min(widthSize, width);
5268            }
5269        }
5270
5271        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5272        int unpaddedWidth = want;
5273        int hintWant = want;
5274
5275        if (mHorizontallyScrolling)
5276            want = VERY_WIDE;
5277
5278        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5279
5280        if (mLayout == null) {
5281            makeNewLayout(want, hintWant, boring, hintBoring,
5282                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5283        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5284                   (mLayout.getEllipsizedWidth() !=
5285                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5286            if (mHint == null && mEllipsize == null &&
5287                    want > mLayout.getWidth() &&
5288                    (mLayout instanceof BoringLayout ||
5289                            (fromexisting && des >= 0 && des <= want))) {
5290                mLayout.increaseWidthTo(want);
5291            } else {
5292                makeNewLayout(want, hintWant, boring, hintBoring,
5293                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5294            }
5295        } else {
5296            // Width has not changed.
5297        }
5298
5299        if (heightMode == MeasureSpec.EXACTLY) {
5300            // Parent has told us how big to be. So be it.
5301            height = heightSize;
5302            mDesiredHeightAtMeasure = -1;
5303        } else {
5304            int desired = getDesiredHeight();
5305
5306            height = desired;
5307            mDesiredHeightAtMeasure = desired;
5308
5309            if (heightMode == MeasureSpec.AT_MOST) {
5310                height = Math.min(desired, heightSize);
5311            }
5312        }
5313
5314        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5315        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5316            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5317        }
5318
5319        /*
5320         * We didn't let makeNewLayout() register to bring the cursor into view,
5321         * so do it here if there is any possibility that it is needed.
5322         */
5323        if (mMovement != null ||
5324            mLayout.getWidth() > unpaddedWidth ||
5325            mLayout.getHeight() > unpaddedHeight) {
5326            registerForPreDraw();
5327        } else {
5328            scrollTo(0, 0);
5329        }
5330
5331        setMeasuredDimension(width, height);
5332    }
5333
5334    private int getDesiredHeight() {
5335        return Math.max(
5336                getDesiredHeight(mLayout, true),
5337                getDesiredHeight(mHintLayout, mEllipsize != null));
5338    }
5339
5340    private int getDesiredHeight(Layout layout, boolean cap) {
5341        if (layout == null) {
5342            return 0;
5343        }
5344
5345        int linecount = layout.getLineCount();
5346        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5347        int desired = layout.getLineTop(linecount);
5348
5349        final Drawables dr = mDrawables;
5350        if (dr != null) {
5351            desired = Math.max(desired, dr.mDrawableHeightLeft);
5352            desired = Math.max(desired, dr.mDrawableHeightRight);
5353        }
5354
5355        desired += pad;
5356
5357        if (mMaxMode == LINES) {
5358            /*
5359             * Don't cap the hint to a certain number of lines.
5360             * (Do cap it, though, if we have a maximum pixel height.)
5361             */
5362            if (cap) {
5363                if (linecount > mMaximum) {
5364                    desired = layout.getLineTop(mMaximum) +
5365                              layout.getBottomPadding();
5366
5367                    if (dr != null) {
5368                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5369                        desired = Math.max(desired, dr.mDrawableHeightRight);
5370                    }
5371
5372                    desired += pad;
5373                    linecount = mMaximum;
5374                }
5375            }
5376        } else {
5377            desired = Math.min(desired, mMaximum);
5378        }
5379
5380        if (mMinMode == LINES) {
5381            if (linecount < mMinimum) {
5382                desired += getLineHeight() * (mMinimum - linecount);
5383            }
5384        } else {
5385            desired = Math.max(desired, mMinimum);
5386        }
5387
5388        // Check against our minimum height
5389        desired = Math.max(desired, getSuggestedMinimumHeight());
5390
5391        return desired;
5392    }
5393
5394    /**
5395     * Check whether a change to the existing text layout requires a
5396     * new view layout.
5397     */
5398    private void checkForResize() {
5399        boolean sizeChanged = false;
5400
5401        if (mLayout != null) {
5402            // Check if our width changed
5403            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5404                sizeChanged = true;
5405                invalidate();
5406            }
5407
5408            // Check if our height changed
5409            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5410                int desiredHeight = getDesiredHeight();
5411
5412                if (desiredHeight != this.getHeight()) {
5413                    sizeChanged = true;
5414                }
5415            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5416                if (mDesiredHeightAtMeasure >= 0) {
5417                    int desiredHeight = getDesiredHeight();
5418
5419                    if (desiredHeight != mDesiredHeightAtMeasure) {
5420                        sizeChanged = true;
5421                    }
5422                }
5423            }
5424        }
5425
5426        if (sizeChanged) {
5427            requestLayout();
5428            // caller will have already invalidated
5429        }
5430    }
5431
5432    /**
5433     * Check whether entirely new text requires a new view layout
5434     * or merely a new text layout.
5435     */
5436    private void checkForRelayout() {
5437        // If we have a fixed width, we can just swap in a new text layout
5438        // if the text height stays the same or if the view height is fixed.
5439
5440        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5441                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5442                (mHint == null || mHintLayout != null) &&
5443                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5444            // Static width, so try making a new text layout.
5445
5446            int oldht = mLayout.getHeight();
5447            int want = mLayout.getWidth();
5448            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5449
5450            /*
5451             * No need to bring the text into view, since the size is not
5452             * changing (unless we do the requestLayout(), in which case it
5453             * will happen at measure).
5454             */
5455            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5456                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5457                          false);
5458
5459            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5460                // In a fixed-height view, so use our new text layout.
5461                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5462                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5463                    invalidate();
5464                    return;
5465                }
5466
5467                // Dynamic height, but height has stayed the same,
5468                // so use our new text layout.
5469                if (mLayout.getHeight() == oldht &&
5470                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5471                    invalidate();
5472                    return;
5473                }
5474            }
5475
5476            // We lose: the height has changed and we have a dynamic height.
5477            // Request a new view layout using our new text layout.
5478            requestLayout();
5479            invalidate();
5480        } else {
5481            // Dynamic width, so we have no choice but to request a new
5482            // view layout with a new text layout.
5483
5484            nullLayouts();
5485            requestLayout();
5486            invalidate();
5487        }
5488    }
5489
5490    /**
5491     * Returns true if anything changed.
5492     */
5493    private boolean bringTextIntoView() {
5494        int line = 0;
5495        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5496            line = mLayout.getLineCount() - 1;
5497        }
5498
5499        Layout.Alignment a = mLayout.getParagraphAlignment(line);
5500        int dir = mLayout.getParagraphDirection(line);
5501        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5502        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5503        int ht = mLayout.getHeight();
5504
5505        int scrollx, scrolly;
5506
5507        if (a == Layout.Alignment.ALIGN_CENTER) {
5508            /*
5509             * Keep centered if possible, or, if it is too wide to fit,
5510             * keep leading edge in view.
5511             */
5512
5513            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5514            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5515
5516            if (right - left < hspace) {
5517                scrollx = (right + left) / 2 - hspace / 2;
5518            } else {
5519                if (dir < 0) {
5520                    scrollx = right - hspace;
5521                } else {
5522                    scrollx = left;
5523                }
5524            }
5525        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
5526            /*
5527             * Keep leading edge in view.
5528             */
5529
5530            if (dir < 0) {
5531                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5532                scrollx = right - hspace;
5533            } else {
5534                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5535            }
5536        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
5537            /*
5538             * Keep trailing edge in view.
5539             */
5540
5541            if (dir < 0) {
5542                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5543            } else {
5544                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5545                scrollx = right - hspace;
5546            }
5547        }
5548
5549        if (ht < vspace) {
5550            scrolly = 0;
5551        } else {
5552            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5553                scrolly = ht - vspace;
5554            } else {
5555                scrolly = 0;
5556            }
5557        }
5558
5559        if (scrollx != mScrollX || scrolly != mScrollY) {
5560            scrollTo(scrollx, scrolly);
5561            return true;
5562        } else {
5563            return false;
5564        }
5565    }
5566
5567    /**
5568     * Move the point, specified by the offset, into the view if it is needed.
5569     * This has to be called after layout. Returns true if anything changed.
5570     */
5571    public boolean bringPointIntoView(int offset) {
5572        boolean changed = false;
5573
5574        int line = mLayout.getLineForOffset(offset);
5575
5576        // FIXME: Is it okay to truncate this, or should we round?
5577        final int x = (int)mLayout.getPrimaryHorizontal(offset);
5578        final int top = mLayout.getLineTop(line);
5579        final int bottom = mLayout.getLineTop(line + 1);
5580
5581        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5582        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5583        int ht = mLayout.getHeight();
5584
5585        int grav;
5586
5587        switch (mLayout.getParagraphAlignment(line)) {
5588            case ALIGN_NORMAL:
5589                grav = 1;
5590                break;
5591
5592            case ALIGN_OPPOSITE:
5593                grav = -1;
5594                break;
5595
5596            default:
5597                grav = 0;
5598        }
5599
5600        grav *= mLayout.getParagraphDirection(line);
5601
5602        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5603        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5604
5605        int hslack = (bottom - top) / 2;
5606        int vslack = hslack;
5607
5608        if (vslack > vspace / 4)
5609            vslack = vspace / 4;
5610        if (hslack > hspace / 4)
5611            hslack = hspace / 4;
5612
5613        int hs = mScrollX;
5614        int vs = mScrollY;
5615
5616        if (top - vs < vslack)
5617            vs = top - vslack;
5618        if (bottom - vs > vspace - vslack)
5619            vs = bottom - (vspace - vslack);
5620        if (ht - vs < vspace)
5621            vs = ht - vspace;
5622        if (0 - vs > 0)
5623            vs = 0;
5624
5625        if (grav != 0) {
5626            if (x - hs < hslack) {
5627                hs = x - hslack;
5628            }
5629            if (x - hs > hspace - hslack) {
5630                hs = x - (hspace - hslack);
5631            }
5632        }
5633
5634        if (grav < 0) {
5635            if (left - hs > 0)
5636                hs = left;
5637            if (right - hs < hspace)
5638                hs = right - hspace;
5639        } else if (grav > 0) {
5640            if (right - hs < hspace)
5641                hs = right - hspace;
5642            if (left - hs > 0)
5643                hs = left;
5644        } else /* grav == 0 */ {
5645            if (right - left <= hspace) {
5646                /*
5647                 * If the entire text fits, center it exactly.
5648                 */
5649                hs = left - (hspace - (right - left)) / 2;
5650            } else if (x > right - hslack) {
5651                /*
5652                 * If we are near the right edge, keep the right edge
5653                 * at the edge of the view.
5654                 */
5655                hs = right - hspace;
5656            } else if (x < left + hslack) {
5657                /*
5658                 * If we are near the left edge, keep the left edge
5659                 * at the edge of the view.
5660                 */
5661                hs = left;
5662            } else if (left > hs) {
5663                /*
5664                 * Is there whitespace visible at the left?  Fix it if so.
5665                 */
5666                hs = left;
5667            } else if (right < hs + hspace) {
5668                /*
5669                 * Is there whitespace visible at the right?  Fix it if so.
5670                 */
5671                hs = right - hspace;
5672            } else {
5673                /*
5674                 * Otherwise, float as needed.
5675                 */
5676                if (x - hs < hslack) {
5677                    hs = x - hslack;
5678                }
5679                if (x - hs > hspace - hslack) {
5680                    hs = x - (hspace - hslack);
5681                }
5682            }
5683        }
5684
5685        if (hs != mScrollX || vs != mScrollY) {
5686            if (mScroller == null) {
5687                scrollTo(hs, vs);
5688            } else {
5689                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
5690                int dx = hs - mScrollX;
5691                int dy = vs - mScrollY;
5692
5693                if (duration > ANIMATED_SCROLL_GAP) {
5694                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
5695                    awakenScrollBars(mScroller.getDuration());
5696                    invalidate();
5697                } else {
5698                    if (!mScroller.isFinished()) {
5699                        mScroller.abortAnimation();
5700                    }
5701
5702                    scrollBy(dx, dy);
5703                }
5704
5705                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
5706            }
5707
5708            changed = true;
5709        }
5710
5711        if (isFocused()) {
5712            // This offsets because getInterestingRect() is in terms of
5713            // viewport coordinates, but requestRectangleOnScreen()
5714            // is in terms of content coordinates.
5715
5716            Rect r = new Rect(x, top, x + 1, bottom);
5717            getInterestingRect(r, line);
5718            r.offset(mScrollX, mScrollY);
5719
5720            if (requestRectangleOnScreen(r)) {
5721                changed = true;
5722            }
5723        }
5724
5725        return changed;
5726    }
5727
5728    /**
5729     * Move the cursor, if needed, so that it is at an offset that is visible
5730     * to the user.  This will not move the cursor if it represents more than
5731     * one character (a selection range).  This will only work if the
5732     * TextView contains spannable text; otherwise it will do nothing.
5733     *
5734     * @return True if the cursor was actually moved, false otherwise.
5735     */
5736    public boolean moveCursorToVisibleOffset() {
5737        if (!(mText instanceof Spannable)) {
5738            return false;
5739        }
5740        int start = getSelectionStart();
5741        int end = getSelectionEnd();
5742        if (start != end) {
5743            return false;
5744        }
5745
5746        // First: make sure the line is visible on screen:
5747
5748        int line = mLayout.getLineForOffset(start);
5749
5750        final int top = mLayout.getLineTop(line);
5751        final int bottom = mLayout.getLineTop(line + 1);
5752        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5753        int vslack = (bottom - top) / 2;
5754        if (vslack > vspace / 4)
5755            vslack = vspace / 4;
5756        final int vs = mScrollY;
5757
5758        if (top < (vs+vslack)) {
5759            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
5760        } else if (bottom > (vspace+vs-vslack)) {
5761            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
5762        }
5763
5764        // Next: make sure the character is visible on screen:
5765
5766        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5767        final int hs = mScrollX;
5768        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
5769        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
5770
5771        int newStart = start;
5772        if (newStart < leftChar) {
5773            newStart = leftChar;
5774        } else if (newStart > rightChar) {
5775            newStart = rightChar;
5776        }
5777
5778        if (newStart != start) {
5779            Selection.setSelection((Spannable)mText, newStart);
5780            return true;
5781        }
5782
5783        return false;
5784    }
5785
5786    @Override
5787    public void computeScroll() {
5788        if (mScroller != null) {
5789            if (mScroller.computeScrollOffset()) {
5790                mScrollX = mScroller.getCurrX();
5791                mScrollY = mScroller.getCurrY();
5792                postInvalidate();  // So we draw again
5793            }
5794        }
5795    }
5796
5797    private void getInterestingRect(Rect r, int line) {
5798        convertFromViewportToContentCoordinates(r);
5799
5800        // Rectangle can can be expanded on first and last line to take
5801        // padding into account.
5802        // TODO Take left/right padding into account too?
5803        if (line == 0) r.top -= getExtendedPaddingTop();
5804        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
5805    }
5806
5807    private void convertFromViewportToContentCoordinates(Rect r) {
5808        final int horizontalOffset = viewportToContentHorizontalOffset();
5809        r.left += horizontalOffset;
5810        r.right += horizontalOffset;
5811
5812        final int verticalOffset = viewportToContentVerticalOffset();
5813        r.top += verticalOffset;
5814        r.bottom += verticalOffset;
5815    }
5816
5817    private int viewportToContentHorizontalOffset() {
5818        return getCompoundPaddingLeft() - mScrollX;
5819    }
5820
5821    private int viewportToContentVerticalOffset() {
5822        int offset = getExtendedPaddingTop() - mScrollY;
5823        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5824            offset += getVerticalOffset(false);
5825        }
5826        return offset;
5827    }
5828
5829    @Override
5830    public void debug(int depth) {
5831        super.debug(depth);
5832
5833        String output = debugIndent(depth);
5834        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
5835                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
5836                + "} ";
5837
5838        if (mText != null) {
5839
5840            output += "mText=\"" + mText + "\" ";
5841            if (mLayout != null) {
5842                output += "mLayout width=" + mLayout.getWidth()
5843                        + " height=" + mLayout.getHeight();
5844            }
5845        } else {
5846            output += "mText=NULL";
5847        }
5848        Log.d(VIEW_LOG_TAG, output);
5849    }
5850
5851    /**
5852     * Convenience for {@link Selection#getSelectionStart}.
5853     */
5854    @ViewDebug.ExportedProperty(category = "text")
5855    public int getSelectionStart() {
5856        return Selection.getSelectionStart(getText());
5857    }
5858
5859    /**
5860     * Convenience for {@link Selection#getSelectionEnd}.
5861     */
5862    @ViewDebug.ExportedProperty(category = "text")
5863    public int getSelectionEnd() {
5864        return Selection.getSelectionEnd(getText());
5865    }
5866
5867    /**
5868     * Return true iff there is a selection inside this text view.
5869     */
5870    public boolean hasSelection() {
5871        final int selectionStart = getSelectionStart();
5872        final int selectionEnd = getSelectionEnd();
5873
5874        return selectionStart >= 0 && selectionStart != selectionEnd;
5875    }
5876
5877    /**
5878     * Sets the properties of this field (lines, horizontally scrolling,
5879     * transformation method) to be for a single-line input.
5880     *
5881     * @attr ref android.R.styleable#TextView_singleLine
5882     */
5883    public void setSingleLine() {
5884        setSingleLine(true);
5885    }
5886
5887    /**
5888     * If true, sets the properties of this field (lines, horizontally
5889     * scrolling, transformation method) to be for a single-line input;
5890     * if false, restores these to the default conditions.
5891     * Note that calling this with false restores default conditions,
5892     * not necessarily those that were in effect prior to calling
5893     * it with true.
5894     *
5895     * @attr ref android.R.styleable#TextView_singleLine
5896     */
5897    @android.view.RemotableViewMethod
5898    public void setSingleLine(boolean singleLine) {
5899        if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
5900                == EditorInfo.TYPE_CLASS_TEXT) {
5901            if (singleLine) {
5902                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5903            } else {
5904                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5905            }
5906        }
5907        applySingleLine(singleLine, true);
5908    }
5909
5910    private void applySingleLine(boolean singleLine, boolean applyTransformation) {
5911        mSingleLine = singleLine;
5912        if (singleLine) {
5913            setLines(1);
5914            setHorizontallyScrolling(true);
5915            if (applyTransformation) {
5916                setTransformationMethod(SingleLineTransformationMethod.
5917                                        getInstance());
5918            }
5919        } else {
5920            setMaxLines(Integer.MAX_VALUE);
5921            setHorizontallyScrolling(false);
5922            if (applyTransformation) {
5923                setTransformationMethod(null);
5924            }
5925        }
5926    }
5927
5928    /**
5929     * Causes words in the text that are longer than the view is wide
5930     * to be ellipsized instead of broken in the middle.  You may also
5931     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
5932     * to constrain the text to a single line.  Use <code>null</code>
5933     * to turn off ellipsizing.
5934     *
5935     * @attr ref android.R.styleable#TextView_ellipsize
5936     */
5937    public void setEllipsize(TextUtils.TruncateAt where) {
5938        mEllipsize = where;
5939
5940        if (mLayout != null) {
5941            nullLayouts();
5942            requestLayout();
5943            invalidate();
5944        }
5945    }
5946
5947    /**
5948     * Sets how many times to repeat the marquee animation. Only applied if the
5949     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
5950     *
5951     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
5952     */
5953    public void setMarqueeRepeatLimit(int marqueeLimit) {
5954        mMarqueeRepeatLimit = marqueeLimit;
5955    }
5956
5957    /**
5958     * Returns where, if anywhere, words that are longer than the view
5959     * is wide should be ellipsized.
5960     */
5961    @ViewDebug.ExportedProperty
5962    public TextUtils.TruncateAt getEllipsize() {
5963        return mEllipsize;
5964    }
5965
5966    /**
5967     * Set the TextView so that when it takes focus, all the text is
5968     * selected.
5969     *
5970     * @attr ref android.R.styleable#TextView_selectAllOnFocus
5971     */
5972    @android.view.RemotableViewMethod
5973    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
5974        mSelectAllOnFocus = selectAllOnFocus;
5975
5976        if (selectAllOnFocus && !(mText instanceof Spannable)) {
5977            setText(mText, BufferType.SPANNABLE);
5978        }
5979    }
5980
5981    /**
5982     * Set whether the cursor is visible.  The default is true.
5983     *
5984     * @attr ref android.R.styleable#TextView_cursorVisible
5985     */
5986    @android.view.RemotableViewMethod
5987    public void setCursorVisible(boolean visible) {
5988        mCursorVisible = visible;
5989        invalidate();
5990
5991        if (visible) {
5992            makeBlink();
5993        } else if (mBlink != null) {
5994            mBlink.removeCallbacks(mBlink);
5995        }
5996
5997        // InsertionPointCursorController depends on mCursorVisible
5998        prepareCursorControllers();
5999    }
6000
6001    private boolean canMarquee() {
6002        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6003        return width > 0 && mLayout.getLineWidth(0) > width;
6004    }
6005
6006    private void startMarquee() {
6007        // Do not ellipsize EditText
6008        if (mInput != null) return;
6009
6010        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6011            return;
6012        }
6013
6014        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6015                getLineCount() == 1 && canMarquee()) {
6016
6017            if (mMarquee == null) mMarquee = new Marquee(this);
6018            mMarquee.start(mMarqueeRepeatLimit);
6019        }
6020    }
6021
6022    private void stopMarquee() {
6023        if (mMarquee != null && !mMarquee.isStopped()) {
6024            mMarquee.stop();
6025        }
6026    }
6027
6028    private void startStopMarquee(boolean start) {
6029        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6030            if (start) {
6031                startMarquee();
6032            } else {
6033                stopMarquee();
6034            }
6035        }
6036    }
6037
6038    private static final class Marquee extends Handler {
6039        // TODO: Add an option to configure this
6040        private static final float MARQUEE_DELTA_MAX = 0.07f;
6041        private static final int MARQUEE_DELAY = 1200;
6042        private static final int MARQUEE_RESTART_DELAY = 1200;
6043        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6044        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6045
6046        private static final byte MARQUEE_STOPPED = 0x0;
6047        private static final byte MARQUEE_STARTING = 0x1;
6048        private static final byte MARQUEE_RUNNING = 0x2;
6049
6050        private static final int MESSAGE_START = 0x1;
6051        private static final int MESSAGE_TICK = 0x2;
6052        private static final int MESSAGE_RESTART = 0x3;
6053
6054        private final WeakReference<TextView> mView;
6055
6056        private byte mStatus = MARQUEE_STOPPED;
6057        private final float mScrollUnit;
6058        private float mMaxScroll;
6059        float mMaxFadeScroll;
6060        private float mGhostStart;
6061        private float mGhostOffset;
6062        private float mFadeStop;
6063        private int mRepeatLimit;
6064
6065        float mScroll;
6066
6067        Marquee(TextView v) {
6068            final float density = v.getContext().getResources().getDisplayMetrics().density;
6069            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6070            mView = new WeakReference<TextView>(v);
6071        }
6072
6073        @Override
6074        public void handleMessage(Message msg) {
6075            switch (msg.what) {
6076                case MESSAGE_START:
6077                    mStatus = MARQUEE_RUNNING;
6078                    tick();
6079                    break;
6080                case MESSAGE_TICK:
6081                    tick();
6082                    break;
6083                case MESSAGE_RESTART:
6084                    if (mStatus == MARQUEE_RUNNING) {
6085                        if (mRepeatLimit >= 0) {
6086                            mRepeatLimit--;
6087                        }
6088                        start(mRepeatLimit);
6089                    }
6090                    break;
6091            }
6092        }
6093
6094        void tick() {
6095            if (mStatus != MARQUEE_RUNNING) {
6096                return;
6097            }
6098
6099            removeMessages(MESSAGE_TICK);
6100
6101            final TextView textView = mView.get();
6102            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6103                mScroll += mScrollUnit;
6104                if (mScroll > mMaxScroll) {
6105                    mScroll = mMaxScroll;
6106                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6107                } else {
6108                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6109                }
6110                textView.invalidate();
6111            }
6112        }
6113
6114        void stop() {
6115            mStatus = MARQUEE_STOPPED;
6116            removeMessages(MESSAGE_START);
6117            removeMessages(MESSAGE_RESTART);
6118            removeMessages(MESSAGE_TICK);
6119            resetScroll();
6120        }
6121
6122        private void resetScroll() {
6123            mScroll = 0.0f;
6124            final TextView textView = mView.get();
6125            if (textView != null) textView.invalidate();
6126        }
6127
6128        void start(int repeatLimit) {
6129            if (repeatLimit == 0) {
6130                stop();
6131                return;
6132            }
6133            mRepeatLimit = repeatLimit;
6134            final TextView textView = mView.get();
6135            if (textView != null && textView.mLayout != null) {
6136                mStatus = MARQUEE_STARTING;
6137                mScroll = 0.0f;
6138                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6139                        textView.getCompoundPaddingRight();
6140                final float lineWidth = textView.mLayout.getLineWidth(0);
6141                final float gap = textWidth / 3.0f;
6142                mGhostStart = lineWidth - textWidth + gap;
6143                mMaxScroll = mGhostStart + textWidth;
6144                mGhostOffset = lineWidth + gap;
6145                mFadeStop = lineWidth + textWidth / 6.0f;
6146                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6147
6148                textView.invalidate();
6149                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6150            }
6151        }
6152
6153        float getGhostOffset() {
6154            return mGhostOffset;
6155        }
6156
6157        boolean shouldDrawLeftFade() {
6158            return mScroll <= mFadeStop;
6159        }
6160
6161        boolean shouldDrawGhost() {
6162            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6163        }
6164
6165        boolean isRunning() {
6166            return mStatus == MARQUEE_RUNNING;
6167        }
6168
6169        boolean isStopped() {
6170            return mStatus == MARQUEE_STOPPED;
6171        }
6172    }
6173
6174    /**
6175     * This method is called when the text is changed, in case any
6176     * subclasses would like to know.
6177     *
6178     * @param text The text the TextView is displaying.
6179     * @param start The offset of the start of the range of the text
6180     *              that was modified.
6181     * @param before The offset of the former end of the range of the
6182     *               text that was modified.  If text was simply inserted,
6183     *               this will be the same as <code>start</code>.
6184     *               If text was replaced with new text or deleted, the
6185     *               length of the old text was <code>before-start</code>.
6186     * @param after The offset of the end of the range of the text
6187     *              that was modified.  If text was simply deleted,
6188     *              this will be the same as <code>start</code>.
6189     *              If text was replaced with new text or inserted,
6190     *              the length of the new text is <code>after-start</code>.
6191     */
6192    protected void onTextChanged(CharSequence text,
6193                                 int start, int before, int after) {
6194    }
6195
6196    /**
6197     * This method is called when the selection has changed, in case any
6198     * subclasses would like to know.
6199     *
6200     * @param selStart The new selection start location.
6201     * @param selEnd The new selection end location.
6202     */
6203    protected void onSelectionChanged(int selStart, int selEnd) {
6204    }
6205
6206    /**
6207     * Adds a TextWatcher to the list of those whose methods are called
6208     * whenever this TextView's text changes.
6209     * <p>
6210     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6211     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6212     * if there are any text changed listeners forces the buffer type to
6213     * Editable if it would not otherwise be and does call this method.
6214     */
6215    public void addTextChangedListener(TextWatcher watcher) {
6216        if (mListeners == null) {
6217            mListeners = new ArrayList<TextWatcher>();
6218        }
6219
6220        mListeners.add(watcher);
6221    }
6222
6223    /**
6224     * Removes the specified TextWatcher from the list of those whose
6225     * methods are called
6226     * whenever this TextView's text changes.
6227     */
6228    public void removeTextChangedListener(TextWatcher watcher) {
6229        if (mListeners != null) {
6230            int i = mListeners.indexOf(watcher);
6231
6232            if (i >= 0) {
6233                mListeners.remove(i);
6234            }
6235        }
6236    }
6237
6238    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6239                                   int after) {
6240        if (mListeners != null) {
6241            final ArrayList<TextWatcher> list = mListeners;
6242            final int count = list.size();
6243            for (int i = 0; i < count; i++) {
6244                list.get(i).beforeTextChanged(text, start, before, after);
6245            }
6246        }
6247    }
6248
6249    /**
6250     * Not private so it can be called from an inner class without going
6251     * through a thunk.
6252     */
6253    void sendOnTextChanged(CharSequence text, int start, int before,
6254                                   int after) {
6255        if (mListeners != null) {
6256            final ArrayList<TextWatcher> list = mListeners;
6257            final int count = list.size();
6258            for (int i = 0; i < count; i++) {
6259                list.get(i).onTextChanged(text, start, before, after);
6260            }
6261        }
6262    }
6263
6264    /**
6265     * Not private so it can be called from an inner class without going
6266     * through a thunk.
6267     */
6268    void sendAfterTextChanged(Editable text) {
6269        if (mListeners != null) {
6270            final ArrayList<TextWatcher> list = mListeners;
6271            final int count = list.size();
6272            for (int i = 0; i < count; i++) {
6273                list.get(i).afterTextChanged(text);
6274            }
6275        }
6276    }
6277
6278    /**
6279     * Not private so it can be called from an inner class without going
6280     * through a thunk.
6281     */
6282    void handleTextChanged(CharSequence buffer, int start,
6283            int before, int after) {
6284        final InputMethodState ims = mInputMethodState;
6285        if (ims == null || ims.mBatchEditNesting == 0) {
6286            updateAfterEdit();
6287        }
6288        if (ims != null) {
6289            ims.mContentChanged = true;
6290            if (ims.mChangedStart < 0) {
6291                ims.mChangedStart = start;
6292                ims.mChangedEnd = start+before;
6293            } else {
6294                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6295                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6296            }
6297            ims.mChangedDelta += after-before;
6298        }
6299
6300        sendOnTextChanged(buffer, start, before, after);
6301        onTextChanged(buffer, start, before, after);
6302
6303        // Hide the controller if the amount of content changed
6304        if (before != after) {
6305            hideControllers();
6306        }
6307    }
6308
6309    /**
6310     * Not private so it can be called from an inner class without going
6311     * through a thunk.
6312     */
6313    void spanChange(Spanned buf, Object what, int oldStart, int newStart,
6314            int oldEnd, int newEnd) {
6315        // XXX Make the start and end move together if this ends up
6316        // spending too much time invalidating.
6317
6318        boolean selChanged = false;
6319        int newSelStart=-1, newSelEnd=-1;
6320
6321        final InputMethodState ims = mInputMethodState;
6322
6323        if (what == Selection.SELECTION_END) {
6324            mHighlightPathBogus = true;
6325            selChanged = true;
6326            newSelEnd = newStart;
6327
6328            if (!isFocused()) {
6329                mSelectionMoved = true;
6330            }
6331
6332            if (oldStart >= 0 || newStart >= 0) {
6333                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6334                registerForPreDraw();
6335
6336                if (isFocused()) {
6337                    mShowCursor = SystemClock.uptimeMillis();
6338                    makeBlink();
6339                }
6340            }
6341        }
6342
6343        if (what == Selection.SELECTION_START) {
6344            mHighlightPathBogus = true;
6345            selChanged = true;
6346            newSelStart = newStart;
6347
6348            if (!isFocused()) {
6349                mSelectionMoved = true;
6350            }
6351
6352            if (oldStart >= 0 || newStart >= 0) {
6353                int end = Selection.getSelectionEnd(buf);
6354                invalidateCursor(end, oldStart, newStart);
6355            }
6356        }
6357
6358        if (selChanged) {
6359            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6360                if (newSelStart < 0) {
6361                    newSelStart = Selection.getSelectionStart(buf);
6362                }
6363                if (newSelEnd < 0) {
6364                    newSelEnd = Selection.getSelectionEnd(buf);
6365                }
6366                onSelectionChanged(newSelStart, newSelEnd);
6367            }
6368        }
6369
6370        if (what instanceof UpdateAppearance ||
6371            what instanceof ParagraphStyle) {
6372            if (ims == null || ims.mBatchEditNesting == 0) {
6373                invalidate();
6374                mHighlightPathBogus = true;
6375                checkForResize();
6376            } else {
6377                ims.mContentChanged = true;
6378            }
6379        }
6380
6381        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6382            mHighlightPathBogus = true;
6383            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6384                ims.mSelectionModeChanged = true;
6385            }
6386
6387            if (Selection.getSelectionStart(buf) >= 0) {
6388                if (ims == null || ims.mBatchEditNesting == 0) {
6389                    invalidateCursor();
6390                } else {
6391                    ims.mCursorChanged = true;
6392                }
6393            }
6394        }
6395
6396        if (what instanceof ParcelableSpan) {
6397            // If this is a span that can be sent to a remote process,
6398            // the current extract editor would be interested in it.
6399            if (ims != null && ims.mExtracting != null) {
6400                if (ims.mBatchEditNesting != 0) {
6401                    if (oldStart >= 0) {
6402                        if (ims.mChangedStart > oldStart) {
6403                            ims.mChangedStart = oldStart;
6404                        }
6405                        if (ims.mChangedStart > oldEnd) {
6406                            ims.mChangedStart = oldEnd;
6407                        }
6408                    }
6409                    if (newStart >= 0) {
6410                        if (ims.mChangedStart > newStart) {
6411                            ims.mChangedStart = newStart;
6412                        }
6413                        if (ims.mChangedStart > newEnd) {
6414                            ims.mChangedStart = newEnd;
6415                        }
6416                    }
6417                } else {
6418                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6419                            + oldStart + "-" + oldEnd + ","
6420                            + newStart + "-" + newEnd + what);
6421                    ims.mContentChanged = true;
6422                }
6423            }
6424        }
6425    }
6426
6427    private class ChangeWatcher
6428    implements TextWatcher, SpanWatcher {
6429
6430        private CharSequence mBeforeText;
6431
6432        public void beforeTextChanged(CharSequence buffer, int start,
6433                                      int before, int after) {
6434            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6435                    + " before=" + before + " after=" + after + ": " + buffer);
6436
6437            if (AccessibilityManager.getInstance(mContext).isEnabled()
6438                    && !isPasswordInputType(mInputType)) {
6439                mBeforeText = buffer.toString();
6440            }
6441
6442            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6443        }
6444
6445        public void onTextChanged(CharSequence buffer, int start,
6446                                  int before, int after) {
6447            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6448                    + " before=" + before + " after=" + after + ": " + buffer);
6449            TextView.this.handleTextChanged(buffer, start, before, after);
6450
6451            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6452                    (isFocused() || isSelected() &&
6453                    isShown())) {
6454                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6455                mBeforeText = null;
6456            }
6457        }
6458
6459        public void afterTextChanged(Editable buffer) {
6460            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6461            TextView.this.sendAfterTextChanged(buffer);
6462
6463            if (MetaKeyKeyListener.getMetaState(buffer,
6464                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6465                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6466            }
6467        }
6468
6469        public void onSpanChanged(Spannable buf,
6470                                  Object what, int s, int e, int st, int en) {
6471            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6472                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6473            TextView.this.spanChange(buf, what, s, st, e, en);
6474        }
6475
6476        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6477            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6478                    + " what=" + what + ": " + buf);
6479            TextView.this.spanChange(buf, what, -1, s, -1, e);
6480        }
6481
6482        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
6483            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
6484                    + " what=" + what + ": " + buf);
6485            TextView.this.spanChange(buf, what, s, -1, e, -1);
6486        }
6487    }
6488
6489    private void makeBlink() {
6490        if (!mCursorVisible) {
6491            if (mBlink != null) {
6492                mBlink.removeCallbacks(mBlink);
6493            }
6494
6495            return;
6496        }
6497
6498        if (mBlink == null)
6499            mBlink = new Blink(this);
6500
6501        mBlink.removeCallbacks(mBlink);
6502        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
6503    }
6504
6505    /**
6506     * @hide
6507     */
6508    @Override
6509    public void dispatchFinishTemporaryDetach() {
6510        mDispatchTemporaryDetach = true;
6511        super.dispatchFinishTemporaryDetach();
6512        mDispatchTemporaryDetach = false;
6513    }
6514
6515    @Override
6516    public void onStartTemporaryDetach() {
6517        super.onStartTemporaryDetach();
6518        // Only track when onStartTemporaryDetach() is called directly,
6519        // usually because this instance is an editable field in a list
6520        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
6521    }
6522
6523    @Override
6524    public void onFinishTemporaryDetach() {
6525        super.onFinishTemporaryDetach();
6526        // Only track when onStartTemporaryDetach() is called directly,
6527        // usually because this instance is an editable field in a list
6528        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
6529    }
6530
6531    @Override
6532    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
6533        if (mTemporaryDetach) {
6534            // If we are temporarily in the detach state, then do nothing.
6535            super.onFocusChanged(focused, direction, previouslyFocusedRect);
6536            return;
6537        }
6538
6539        mShowCursor = SystemClock.uptimeMillis();
6540
6541        ensureEndedBatchEdit();
6542
6543        if (focused) {
6544            int selStart = getSelectionStart();
6545            int selEnd = getSelectionEnd();
6546
6547            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
6548                // Has to be done before onTakeFocus, which can be overloaded.
6549                if (mLastTouchOffset >= 0) {
6550                    // Can happen when a TextView is displayed after its content has been deleted.
6551                    mLastTouchOffset = Math.min(mLastTouchOffset, mText.length());
6552                    Selection.setSelection((Spannable) mText, mLastTouchOffset);
6553                }
6554
6555                if (mMovement != null) {
6556                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
6557                }
6558
6559                if (mSelectAllOnFocus) {
6560                    Selection.setSelection((Spannable) mText, 0, mText.length());
6561                }
6562
6563                // The DecorView does not have focus when the 'Done' ExtractEditText button is
6564                // pressed. Since it is the ViewRoot's mView, it requests focus before
6565                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
6566                // This special case ensure that we keep current selection in that case.
6567                // It would be better to know why the DecorView does not have focus at that time.
6568                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
6569                        selStart >= 0 && selEnd >= 0) {
6570                    /*
6571                     * Someone intentionally set the selection, so let them
6572                     * do whatever it is that they wanted to do instead of
6573                     * the default on-focus behavior.  We reset the selection
6574                     * here instead of just skipping the onTakeFocus() call
6575                     * because some movement methods do something other than
6576                     * just setting the selection in theirs and we still
6577                     * need to go through that path.
6578                     */
6579                    Selection.setSelection((Spannable) mText, selStart, selEnd);
6580                }
6581                mTouchFocusSelected = true;
6582            }
6583
6584            mFrozenWithFocus = false;
6585            mSelectionMoved = false;
6586
6587            if (mText instanceof Spannable) {
6588                Spannable sp = (Spannable) mText;
6589                MetaKeyKeyListener.resetMetaState(sp);
6590            }
6591
6592            makeBlink();
6593
6594            if (mError != null) {
6595                showError();
6596            }
6597        } else {
6598            if (mError != null) {
6599                hideError();
6600            }
6601            // Don't leave us in the middle of a batch edit.
6602            onEndBatchEdit();
6603
6604            hideInsertionPointCursorController();
6605            if (this instanceof ExtractEditText) {
6606                // terminateTextSelectionMode would remove selection, which we want to keep when
6607                // ExtractEditText goes out of focus.
6608                mIsInTextSelectionMode = false;
6609            } else {
6610                terminateTextSelectionMode();
6611            }
6612
6613            mLastTouchOffset = -1;
6614        }
6615
6616        startStopMarquee(focused);
6617
6618        if (mTransformation != null) {
6619            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
6620        }
6621
6622        super.onFocusChanged(focused, direction, previouslyFocusedRect);
6623    }
6624
6625    @Override
6626    public void onWindowFocusChanged(boolean hasWindowFocus) {
6627        super.onWindowFocusChanged(hasWindowFocus);
6628
6629        if (hasWindowFocus) {
6630            if (mBlink != null) {
6631                mBlink.uncancel();
6632
6633                if (isFocused()) {
6634                    mShowCursor = SystemClock.uptimeMillis();
6635                    makeBlink();
6636                }
6637            }
6638        } else {
6639            if (mBlink != null) {
6640                mBlink.cancel();
6641            }
6642            // Don't leave us in the middle of a batch edit.
6643            onEndBatchEdit();
6644            if (mInputContentType != null) {
6645                mInputContentType.enterDown = false;
6646            }
6647            hideInsertionPointCursorController();
6648            if (mSelectionModifierCursorController != null) {
6649                mSelectionModifierCursorController.hide();
6650            }
6651        }
6652
6653        startStopMarquee(hasWindowFocus);
6654    }
6655
6656    @Override
6657    protected void onVisibilityChanged(View changedView, int visibility) {
6658        super.onVisibilityChanged(changedView, visibility);
6659        if (visibility != VISIBLE) {
6660            hideInsertionPointCursorController();
6661            if (mSelectionModifierCursorController != null) {
6662                mSelectionModifierCursorController.hide();
6663            }
6664        }
6665    }
6666
6667    /**
6668     * Use {@link BaseInputConnection#removeComposingSpans
6669     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
6670     * state from this text view.
6671     */
6672    public void clearComposingText() {
6673        if (mText instanceof Spannable) {
6674            BaseInputConnection.removeComposingSpans((Spannable)mText);
6675        }
6676    }
6677
6678    @Override
6679    public void setSelected(boolean selected) {
6680        boolean wasSelected = isSelected();
6681
6682        super.setSelected(selected);
6683
6684        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6685            if (selected) {
6686                startMarquee();
6687            } else {
6688                stopMarquee();
6689            }
6690        }
6691    }
6692
6693    private void onTapUpEvent(int prevStart, int prevEnd) {
6694        final int start = getSelectionStart();
6695        final int end = getSelectionEnd();
6696
6697        if (start == end) {
6698            if (start >= prevStart && start < prevEnd) {
6699                // Restore previous selection
6700                Selection.setSelection((Spannable)mText, prevStart, prevEnd);
6701
6702                if (mSelectionModifierCursorController != null &&
6703                        !mSelectionModifierCursorController.isShowing()) {
6704                    // If the anchors aren't showing, revive them.
6705                    mSelectionModifierCursorController.show();
6706                } else {
6707                    // Tapping inside the selection displays the cut/copy/paste context menu
6708                    // as long as the anchors are already showing.
6709                    showContextMenu();
6710                }
6711                return;
6712            } else {
6713                // Tapping outside stops selection mode, if any
6714                stopTextSelectionMode();
6715
6716                if (mInsertionPointCursorController != null) {
6717                    mInsertionPointCursorController.show();
6718                }
6719            }
6720        } else if (hasSelection() && mSelectionModifierCursorController != null) {
6721            mSelectionModifierCursorController.show();
6722        }
6723    }
6724
6725    class CommitSelectionReceiver extends ResultReceiver {
6726        private final int mPrevStart, mPrevEnd;
6727
6728        public CommitSelectionReceiver(int prevStart, int prevEnd) {
6729            super(getHandler());
6730            mPrevStart = prevStart;
6731            mPrevEnd = prevEnd;
6732        }
6733
6734        @Override
6735        protected void onReceiveResult(int resultCode, Bundle resultData) {
6736            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
6737            // by restoring its previous position.
6738            if (resultCode == InputMethodManager.RESULT_SHOWN) {
6739                final int len = mText.length();
6740                int start = Math.min(len, mPrevStart);
6741                int end = Math.min(len, mPrevEnd);
6742                Selection.setSelection((Spannable)mText, start, end);
6743
6744                if (hasSelection()) {
6745                    startTextSelectionMode();
6746                }
6747            }
6748        }
6749    }
6750
6751    @Override
6752    public boolean onTouchEvent(MotionEvent event) {
6753        final int action = event.getActionMasked();
6754        if (action == MotionEvent.ACTION_DOWN) {
6755            if (mInsertionPointCursorController != null) {
6756                mInsertionPointCursorController.onTouchEvent(event);
6757            }
6758            if (mSelectionModifierCursorController != null) {
6759                mSelectionModifierCursorController.onTouchEvent(event);
6760            }
6761
6762            // Reset this state; it will be re-set if super.onTouchEvent
6763            // causes focus to move to the view.
6764            mTouchFocusSelected = false;
6765            mScrolled = false;
6766        }
6767
6768        final boolean superResult = super.onTouchEvent(event);
6769
6770        /*
6771         * Don't handle the release after a long press, because it will
6772         * move the selection away from whatever the menu action was
6773         * trying to affect.
6774         */
6775        if (mEatTouchRelease && action == MotionEvent.ACTION_UP) {
6776            mEatTouchRelease = false;
6777            return superResult;
6778        }
6779
6780        if ((mMovement != null || onCheckIsTextEditor()) && mText instanceof Spannable && mLayout != null) {
6781            if (mInsertionPointCursorController != null) {
6782                mInsertionPointCursorController.onTouchEvent(event);
6783            }
6784            if (mSelectionModifierCursorController != null) {
6785                mSelectionModifierCursorController.onTouchEvent(event);
6786            }
6787
6788            boolean handled = false;
6789
6790            // Save previous selection, in case this event is used to show the IME.
6791            int oldSelStart = getSelectionStart();
6792            int oldSelEnd = getSelectionEnd();
6793
6794            final int oldScrollX = mScrollX;
6795            final int oldScrollY = mScrollY;
6796
6797            if (mMovement != null) {
6798                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
6799            }
6800
6801            if (isTextEditable()) {
6802                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
6803                    // Hide insertion anchor while scrolling. Leave selection.
6804                    hideInsertionPointCursorController();
6805                    if (mSelectionModifierCursorController != null &&
6806                            mSelectionModifierCursorController.isShowing()) {
6807                        mSelectionModifierCursorController.updatePosition();
6808                    }
6809                }
6810                if (action == MotionEvent.ACTION_UP && isFocused() && !mScrolled) {
6811                    InputMethodManager imm = (InputMethodManager)
6812                          getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
6813
6814                    CommitSelectionReceiver csr = null;
6815                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
6816                            didTouchFocusSelect()) {
6817                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
6818                    }
6819
6820                    handled |= imm.showSoftInput(this, 0, csr) && (csr != null);
6821
6822                    // Cannot be done by CommitSelectionReceiver, which might not always be called,
6823                    // for instance when dealing with an ExtractEditText.
6824                    onTapUpEvent(oldSelStart, oldSelEnd);
6825                }
6826            }
6827
6828            if (handled) {
6829                return true;
6830            }
6831        }
6832
6833        return superResult;
6834    }
6835
6836    private void prepareCursorControllers() {
6837        // TODO Add an extra android:cursorController flag to disable the controller?
6838        if (mCursorVisible && mLayout != null) {
6839            if (mInsertionPointCursorController == null) {
6840                mInsertionPointCursorController = new InsertionPointCursorController();
6841            }
6842        } else {
6843            mInsertionPointCursorController = null;
6844        }
6845
6846        if (textCanBeSelected() && mLayout != null) {
6847            if (mSelectionModifierCursorController == null) {
6848                mSelectionModifierCursorController = new SelectionModifierCursorController();
6849            }
6850        } else {
6851            // Stop selection mode if the controller becomes unavailable.
6852            stopTextSelectionMode();
6853            mSelectionModifierCursorController = null;
6854        }
6855    }
6856
6857    /**
6858     * @return True iff this TextView contains a text that can be edited.
6859     */
6860    private boolean isTextEditable() {
6861        return mText instanceof Editable && onCheckIsTextEditor();
6862    }
6863
6864    /**
6865     * Returns true, only while processing a touch gesture, if the initial
6866     * touch down event caused focus to move to the text view and as a result
6867     * its selection changed.  Only valid while processing the touch gesture
6868     * of interest.
6869     */
6870    public boolean didTouchFocusSelect() {
6871        return mTouchFocusSelected;
6872    }
6873
6874    @Override
6875    public void cancelLongPress() {
6876        super.cancelLongPress();
6877        mScrolled = true;
6878    }
6879
6880    @Override
6881    public boolean onTrackballEvent(MotionEvent event) {
6882        if (mMovement != null && mText instanceof Spannable &&
6883            mLayout != null) {
6884            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
6885                return true;
6886            }
6887        }
6888
6889        return super.onTrackballEvent(event);
6890    }
6891
6892    public void setScroller(Scroller s) {
6893        mScroller = s;
6894    }
6895
6896    private static class Blink extends Handler implements Runnable {
6897        private final WeakReference<TextView> mView;
6898        private boolean mCancelled;
6899
6900        public Blink(TextView v) {
6901            mView = new WeakReference<TextView>(v);
6902        }
6903
6904        public void run() {
6905            if (mCancelled) {
6906                return;
6907            }
6908
6909            removeCallbacks(Blink.this);
6910
6911            TextView tv = mView.get();
6912
6913            if (tv != null && tv.isFocused()) {
6914                int st = tv.getSelectionStart();
6915                int en = tv.getSelectionEnd();
6916
6917                if (st == en && st >= 0 && en >= 0) {
6918                    if (tv.mLayout != null) {
6919                        tv.invalidateCursorPath();
6920                    }
6921
6922                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
6923                }
6924            }
6925        }
6926
6927        void cancel() {
6928            if (!mCancelled) {
6929                removeCallbacks(Blink.this);
6930                mCancelled = true;
6931            }
6932        }
6933
6934        void uncancel() {
6935            mCancelled = false;
6936        }
6937    }
6938
6939    @Override
6940    protected float getLeftFadingEdgeStrength() {
6941        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6942            if (mMarquee != null && !mMarquee.isStopped()) {
6943                final Marquee marquee = mMarquee;
6944                if (marquee.shouldDrawLeftFade()) {
6945                    return marquee.mScroll / getHorizontalFadingEdgeLength();
6946                } else {
6947                    return 0.0f;
6948                }
6949            } else if (getLineCount() == 1) {
6950                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6951                    case Gravity.LEFT:
6952                        return 0.0f;
6953                    case Gravity.RIGHT:
6954                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
6955                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
6956                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
6957                    case Gravity.CENTER_HORIZONTAL:
6958                        return 0.0f;
6959                }
6960            }
6961        }
6962        return super.getLeftFadingEdgeStrength();
6963    }
6964
6965    @Override
6966    protected float getRightFadingEdgeStrength() {
6967        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6968            if (mMarquee != null && !mMarquee.isStopped()) {
6969                final Marquee marquee = mMarquee;
6970                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
6971            } else if (getLineCount() == 1) {
6972                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6973                    case Gravity.LEFT:
6974                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
6975                                getCompoundPaddingRight();
6976                        final float lineWidth = mLayout.getLineWidth(0);
6977                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
6978                    case Gravity.RIGHT:
6979                        return 0.0f;
6980                    case Gravity.CENTER_HORIZONTAL:
6981                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
6982                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
6983                                getHorizontalFadingEdgeLength();
6984                }
6985            }
6986        }
6987        return super.getRightFadingEdgeStrength();
6988    }
6989
6990    @Override
6991    protected int computeHorizontalScrollRange() {
6992        if (mLayout != null)
6993            return mLayout.getWidth();
6994
6995        return super.computeHorizontalScrollRange();
6996    }
6997
6998    @Override
6999    protected int computeVerticalScrollRange() {
7000        if (mLayout != null)
7001            return mLayout.getHeight();
7002
7003        return super.computeVerticalScrollRange();
7004    }
7005
7006    @Override
7007    protected int computeVerticalScrollExtent() {
7008        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7009    }
7010
7011    public enum BufferType {
7012        NORMAL, SPANNABLE, EDITABLE,
7013    }
7014
7015    /**
7016     * Returns the TextView_textColor attribute from the
7017     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7018     * from the TextView_textAppearance attribute, if TextView_textColor
7019     * was not set directly.
7020     */
7021    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7022        ColorStateList colors;
7023        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7024                                         TextView_textColor);
7025
7026        if (colors == null) {
7027            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7028                                         TextView_textAppearance, -1);
7029            if (ap != -1) {
7030                TypedArray appearance;
7031                appearance = context.obtainStyledAttributes(ap,
7032                                            com.android.internal.R.styleable.TextAppearance);
7033                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7034                                                  TextAppearance_textColor);
7035                appearance.recycle();
7036            }
7037        }
7038
7039        return colors;
7040    }
7041
7042    /**
7043     * Returns the default color from the TextView_textColor attribute
7044     * from the AttributeSet, if set, or the default color from the
7045     * TextAppearance_textColor from the TextView_textAppearance attribute,
7046     * if TextView_textColor was not set directly.
7047     */
7048    public static int getTextColor(Context context,
7049                                   TypedArray attrs,
7050                                   int def) {
7051        ColorStateList colors = getTextColors(context, attrs);
7052
7053        if (colors == null) {
7054            return def;
7055        } else {
7056            return colors.getDefaultColor();
7057        }
7058    }
7059
7060    @Override
7061    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7062        switch (keyCode) {
7063        case KeyEvent.KEYCODE_A:
7064            if (canSelectText()) {
7065                return onTextContextMenuItem(ID_SELECT_ALL);
7066            }
7067
7068            break;
7069
7070        case KeyEvent.KEYCODE_X:
7071            if (canCut()) {
7072                return onTextContextMenuItem(ID_CUT);
7073            }
7074
7075            break;
7076
7077        case KeyEvent.KEYCODE_C:
7078            if (canCopy()) {
7079                return onTextContextMenuItem(ID_COPY);
7080            }
7081
7082            break;
7083
7084        case KeyEvent.KEYCODE_V:
7085            if (canPaste()) {
7086                return onTextContextMenuItem(ID_PASTE);
7087            }
7088
7089            break;
7090        }
7091
7092        return super.onKeyShortcut(keyCode, event);
7093    }
7094
7095    private boolean canSelectText() {
7096        return textCanBeSelected() && mText.length() != 0;
7097    }
7098
7099    private boolean textCanBeSelected() {
7100        // prepareCursorController() relies on this method.
7101        // If you change this condition, make sure prepareCursorController is called anywhere
7102        // the value of this condition might be changed.
7103        return (mText instanceof Spannable &&
7104                mMovement != null &&
7105                mMovement.canSelectArbitrarily());
7106    }
7107
7108    private boolean canCut() {
7109        if (mTransformation instanceof PasswordTransformationMethod) {
7110            return false;
7111        }
7112
7113        if (mText.length() > 0 && hasSelection()) {
7114            if (mText instanceof Editable && mInput != null) {
7115                return true;
7116            }
7117        }
7118
7119        return false;
7120    }
7121
7122    private boolean canCopy() {
7123        if (mTransformation instanceof PasswordTransformationMethod) {
7124            return false;
7125        }
7126
7127        if (mText.length() > 0 && hasSelection()) {
7128            return true;
7129        }
7130
7131        return false;
7132    }
7133
7134    private boolean canPaste() {
7135        return (mText instanceof Editable &&
7136                mInput != null &&
7137                getSelectionStart() >= 0 &&
7138                getSelectionEnd() >= 0 &&
7139                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7140                hasText());
7141    }
7142
7143    /**
7144     * Returns the offsets delimiting the 'word' located at position offset.
7145     *
7146     * @param offset An offset in the text.
7147     * @return The offsets for the start and end of the word located at <code>offset</code>.
7148     * The two ints offsets are packed in a long, with the starting offset shifted by 32 bits.
7149     * Returns a negative value if no valid word was found.
7150     */
7151    private long getWordLimitsAt(int offset) {
7152        /*
7153         * Quick return if the input type is one where adding words
7154         * to the dictionary doesn't make any sense.
7155         */
7156        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7157        if (klass == InputType.TYPE_CLASS_NUMBER ||
7158            klass == InputType.TYPE_CLASS_PHONE ||
7159            klass == InputType.TYPE_CLASS_DATETIME) {
7160            return -1;
7161        }
7162
7163        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7164        if (variation == InputType.TYPE_TEXT_VARIATION_URI ||
7165            variation == InputType.TYPE_TEXT_VARIATION_PASSWORD ||
7166            variation == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD ||
7167            variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7168            variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7169            return -1;
7170        }
7171
7172        int len = mText.length();
7173        int end = Math.min(offset, len);
7174
7175        if (end < 0) {
7176            return -1;
7177        }
7178
7179        int start = end;
7180
7181        for (; start > 0; start--) {
7182            char c = mTransformed.charAt(start - 1);
7183            int type = Character.getType(c);
7184
7185            if (c != '\'' &&
7186                type != Character.UPPERCASE_LETTER &&
7187                type != Character.LOWERCASE_LETTER &&
7188                type != Character.TITLECASE_LETTER &&
7189                type != Character.MODIFIER_LETTER &&
7190                type != Character.DECIMAL_DIGIT_NUMBER) {
7191                break;
7192            }
7193        }
7194
7195        for (; end < len; end++) {
7196            char c = mTransformed.charAt(end);
7197            int type = Character.getType(c);
7198
7199            if (c != '\'' &&
7200                type != Character.UPPERCASE_LETTER &&
7201                type != Character.LOWERCASE_LETTER &&
7202                type != Character.TITLECASE_LETTER &&
7203                type != Character.MODIFIER_LETTER &&
7204                type != Character.DECIMAL_DIGIT_NUMBER) {
7205                break;
7206            }
7207        }
7208
7209        if (start == end) {
7210            return -1;
7211        }
7212
7213        if (end - start > 48) {
7214            return -1;
7215        }
7216
7217        boolean hasLetter = false;
7218        for (int i = start; i < end; i++) {
7219            if (Character.isLetter(mTransformed.charAt(i))) {
7220                hasLetter = true;
7221                break;
7222            }
7223        }
7224
7225        if (!hasLetter) {
7226            return -1;
7227        }
7228
7229        // Two ints packed in a long
7230        return (((long) start) << 32) | end;
7231    }
7232
7233    private void selectCurrentWord() {
7234        // In case selection mode is started after an orientation change or after a select all,
7235        // use the current selection instead of creating one
7236        if (hasSelection()) {
7237            return;
7238        }
7239
7240        int selectionStart, selectionEnd;
7241
7242        // selectionModifierCursorController is not null at that point
7243        SelectionModifierCursorController selectionModifierCursorController =
7244            ((SelectionModifierCursorController) mSelectionModifierCursorController);
7245        int minOffset = selectionModifierCursorController.getMinTouchOffset();
7246        int maxOffset = selectionModifierCursorController.getMaxTouchOffset();
7247
7248        long wordLimits = getWordLimitsAt(minOffset);
7249        if (wordLimits >= 0) {
7250            selectionStart = (int) (wordLimits >>> 32);
7251        } else {
7252            selectionStart = Math.max(minOffset - 5, 0);
7253        }
7254
7255        wordLimits = getWordLimitsAt(maxOffset);
7256        if (wordLimits >= 0) {
7257            selectionEnd = (int) (wordLimits & 0x00000000FFFFFFFFL);
7258        } else {
7259            selectionEnd = Math.min(maxOffset + 5, mText.length());
7260        }
7261
7262        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7263    }
7264
7265    private String getWordForDictionary() {
7266        if (mLastTouchOffset < 0) {
7267            return null;
7268        }
7269
7270        long wordLimits = getWordLimitsAt(mLastTouchOffset);
7271        if (wordLimits >= 0) {
7272            int start = (int) (wordLimits >>> 32);
7273            int end = (int) (wordLimits & 0x00000000FFFFFFFFL);
7274            return mTransformed.subSequence(start, end).toString();
7275        } else {
7276            return null;
7277        }
7278    }
7279
7280    @Override
7281    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7282        if (!isShown()) {
7283            return false;
7284        }
7285
7286        final boolean isPassword = isPasswordInputType(mInputType);
7287
7288        if (!isPassword) {
7289            CharSequence text = getText();
7290            if (TextUtils.isEmpty(text)) {
7291                text = getHint();
7292            }
7293            if (!TextUtils.isEmpty(text)) {
7294                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7295                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7296                }
7297                event.getText().add(text);
7298            }
7299        } else {
7300            event.setPassword(isPassword);
7301        }
7302        return false;
7303    }
7304
7305    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7306            int fromIndex, int removedCount, int addedCount) {
7307        AccessibilityEvent event =
7308            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7309        event.setFromIndex(fromIndex);
7310        event.setRemovedCount(removedCount);
7311        event.setAddedCount(addedCount);
7312        event.setBeforeText(beforeText);
7313        sendAccessibilityEventUnchecked(event);
7314    }
7315
7316    @Override
7317    protected void onCreateContextMenu(ContextMenu menu) {
7318        super.onCreateContextMenu(menu);
7319        boolean added = false;
7320
7321        if (mIsInTextSelectionMode) {
7322            MenuHandler handler = new MenuHandler();
7323
7324            if (canCut()) {
7325                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
7326                     setOnMenuItemClickListener(handler).
7327                     setAlphabeticShortcut('x');
7328                added = true;
7329            }
7330
7331            if (canCopy()) {
7332                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7333                     setOnMenuItemClickListener(handler).
7334                     setAlphabeticShortcut('c');
7335                added = true;
7336            }
7337
7338            if (canPaste()) {
7339                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7340                     setOnMenuItemClickListener(handler).
7341                     setAlphabeticShortcut('v');
7342                added = true;
7343            }
7344        } else {
7345            /*
7346            if (!isFocused()) {
7347                if (isFocusable() && mInput != null) {
7348                    if (canCopy()) {
7349                        MenuHandler handler = new MenuHandler();
7350                        menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7351                             setOnMenuItemClickListener(handler).
7352                             setAlphabeticShortcut('c');
7353                        menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7354                    }
7355                }
7356
7357                //return;
7358            }
7359             */
7360            MenuHandler handler = new MenuHandler();
7361
7362            if (canSelectText()) {
7363                menu.add(0, ID_START_SELECTING_TEXT, 0, com.android.internal.R.string.selectText).
7364                     setOnMenuItemClickListener(handler);
7365                menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
7366                     setOnMenuItemClickListener(handler).
7367                     setAlphabeticShortcut('a');
7368                added = true;
7369            }
7370
7371            if (mText instanceof Spanned) {
7372                int selStart = getSelectionStart();
7373                int selEnd = getSelectionEnd();
7374
7375                int min = Math.min(selStart, selEnd);
7376                int max = Math.max(selStart, selEnd);
7377
7378                URLSpan[] urls = ((Spanned) mText).getSpans(min, max,
7379                        URLSpan.class);
7380                if (urls.length == 1) {
7381                    menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7382                         setOnMenuItemClickListener(handler);
7383                    added = true;
7384                }
7385            }
7386
7387            if (canPaste()) {
7388                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7389                     setOnMenuItemClickListener(handler).
7390                     setAlphabeticShortcut('v');
7391                added = true;
7392            }
7393
7394            if (isInputMethodTarget()) {
7395                menu.add(1, ID_SWITCH_INPUT_METHOD, 0, com.android.internal.R.string.inputMethod).
7396                     setOnMenuItemClickListener(handler);
7397                added = true;
7398            }
7399
7400            String word = getWordForDictionary();
7401            if (word != null) {
7402                menu.add(1, ID_ADD_TO_DICTIONARY, 0,
7403                     getContext().getString(com.android.internal.R.string.addToDictionary, word)).
7404                     setOnMenuItemClickListener(handler);
7405                added = true;
7406
7407            }
7408        }
7409
7410        if (added) {
7411            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7412        }
7413    }
7414
7415    /**
7416     * Returns whether this text view is a current input method target.  The
7417     * default implementation just checks with {@link InputMethodManager}.
7418     */
7419    public boolean isInputMethodTarget() {
7420        InputMethodManager imm = InputMethodManager.peekInstance();
7421        return imm != null && imm.isActive(this);
7422    }
7423
7424    // Context menu entries
7425    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7426    private static final int ID_START_SELECTING_TEXT = android.R.id.startSelectingText;
7427    private static final int ID_CUT = android.R.id.cut;
7428    private static final int ID_COPY = android.R.id.copy;
7429    private static final int ID_PASTE = android.R.id.paste;
7430    private static final int ID_COPY_URL = android.R.id.copyUrl;
7431    private static final int ID_SWITCH_INPUT_METHOD = android.R.id.switchInputMethod;
7432    private static final int ID_ADD_TO_DICTIONARY = android.R.id.addToDictionary;
7433
7434    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7435        public boolean onMenuItemClick(MenuItem item) {
7436            return onTextContextMenuItem(item.getItemId());
7437        }
7438    }
7439
7440    /**
7441     * Called when a context menu option for the text view is selected.  Currently
7442     * this will be one of: {@link android.R.id#selectAll},
7443     * {@link android.R.id#startSelectingText},
7444     * {@link android.R.id#cut}, {@link android.R.id#copy},
7445     * {@link android.R.id#paste}, {@link android.R.id#copyUrl},
7446     * or {@link android.R.id#switchInputMethod}.
7447     */
7448    public boolean onTextContextMenuItem(int id) {
7449        int min = 0;
7450        int max = mText.length();
7451
7452        if (isFocused()) {
7453            final int selStart = getSelectionStart();
7454            final int selEnd = getSelectionEnd();
7455
7456            min = Math.max(0, Math.min(selStart, selEnd));
7457            max = Math.max(0, Math.max(selStart, selEnd));
7458        }
7459
7460        ClipboardManager clip = (ClipboardManager)getContext()
7461                .getSystemService(Context.CLIPBOARD_SERVICE);
7462
7463        switch (id) {
7464            case ID_SELECT_ALL:
7465                Selection.setSelection((Spannable) mText, 0, mText.length());
7466                startTextSelectionMode();
7467                return true;
7468
7469            case ID_START_SELECTING_TEXT:
7470                startTextSelectionMode();
7471                return true;
7472
7473            case ID_CUT:
7474                clip.setText(mTransformed.subSequence(min, max));
7475                ((Editable) mText).delete(min, max);
7476                stopTextSelectionMode();
7477                return true;
7478
7479            case ID_COPY:
7480                clip.setText(mTransformed.subSequence(min, max));
7481                stopTextSelectionMode();
7482                return true;
7483
7484            case ID_PASTE:
7485                CharSequence paste = clip.getText();
7486
7487                if (paste != null && paste.length() > 0) {
7488                    // Paste adds/removes spaces before or after insertion as needed.
7489
7490                    if (Character.isSpaceChar(paste.charAt(0))) {
7491                        if (min > 0 && Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7492                            // Two spaces at beginning of paste: remove one
7493                            final int originalLength = mText.length();
7494                            ((Editable) mText).replace(min - 1, min, "");
7495                            // Due to filters, there is no garantee that exactly one character was
7496                            // removed. Count instead.
7497                            final int delta = mText.length() - originalLength;
7498                            min += delta;
7499                            max += delta;
7500                        }
7501                    } else {
7502                        if (min > 0 && !Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7503                            // No space at beginning of paste: add one
7504                            final int originalLength = mText.length();
7505                            ((Editable) mText).replace(min, min, " ");
7506                            // Taking possible filters into account as above.
7507                            final int delta = mText.length() - originalLength;
7508                            min += delta;
7509                            max += delta;
7510                        }
7511                    }
7512
7513                    if (Character.isSpaceChar(paste.charAt(paste.length() - 1))) {
7514                        if (max < mText.length() && Character.isSpaceChar(mTransformed.charAt(max))) {
7515                            // Two spaces at end of paste: remove one
7516                            ((Editable) mText).replace(max, max + 1, "");
7517                        }
7518                    } else {
7519                        if (max < mText.length() && !Character.isSpaceChar(mTransformed.charAt(max))) {
7520                            // No space at end of paste: add one
7521                            ((Editable) mText).replace(max, max, " ");
7522                        }
7523                    }
7524
7525                    Selection.setSelection((Spannable) mText, max);
7526                    ((Editable) mText).replace(min, max, paste);
7527                    stopTextSelectionMode();
7528                }
7529                return true;
7530
7531            case ID_COPY_URL:
7532                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7533                if (urls.length == 1) {
7534                    clip.setText(urls[0].getURL());
7535                }
7536                return true;
7537
7538            case ID_SWITCH_INPUT_METHOD:
7539                InputMethodManager imm = InputMethodManager.peekInstance();
7540                if (imm != null) {
7541                    imm.showInputMethodPicker();
7542                }
7543                return true;
7544
7545            case ID_ADD_TO_DICTIONARY:
7546                String word = getWordForDictionary();
7547
7548                if (word != null) {
7549                    Intent i = new Intent("com.android.settings.USER_DICTIONARY_INSERT");
7550                    i.putExtra("word", word);
7551                    i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
7552                    getContext().startActivity(i);
7553                }
7554                return true;
7555            }
7556
7557        return false;
7558    }
7559
7560    @Override
7561    public boolean performLongClick() {
7562        if (super.performLongClick()) {
7563            mEatTouchRelease = true;
7564            return true;
7565        }
7566
7567        return false;
7568    }
7569
7570    private void startTextSelectionMode() {
7571        if (!mIsInTextSelectionMode) {
7572            if (mSelectionModifierCursorController == null) {
7573                Log.w(LOG_TAG, "TextView has no selection controller. Action mode cancelled.");
7574                return;
7575            }
7576
7577            if (!requestFocus()) {
7578                return;
7579            }
7580
7581            selectCurrentWord();
7582            mSelectionModifierCursorController.show();
7583            mIsInTextSelectionMode = true;
7584        }
7585    }
7586
7587    /**
7588     * Same as {@link #stopTextSelectionMode()}, except that there is no cursor controller
7589     * fade out animation. Needed since the drawable and their alpha values are shared by all
7590     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
7591     * new one otherwise.
7592     */
7593    private void terminateTextSelectionMode() {
7594        stopTextSelectionMode();
7595        if (mSelectionModifierCursorController != null) {
7596            SelectionModifierCursorController selectionModifierCursorController =
7597                (SelectionModifierCursorController) mSelectionModifierCursorController;
7598            selectionModifierCursorController.cancelFadeOutAnimation();
7599        }
7600    }
7601
7602    private void stopTextSelectionMode() {
7603        if (mIsInTextSelectionMode) {
7604            Selection.setSelection((Spannable) mText, getSelectionEnd());
7605            if (mSelectionModifierCursorController != null) {
7606                mSelectionModifierCursorController.hide();
7607            }
7608
7609            mIsInTextSelectionMode = false;
7610        }
7611    }
7612
7613    /**
7614     * A CursorController instance can be used to control a cursor in the text.
7615     * It is not used outside of {@link TextView}.
7616     * @hide
7617     */
7618    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
7619        /**
7620         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
7621         * See also {@link #hide()}.
7622         */
7623        public void show();
7624
7625        /**
7626         * Hide the cursor controller from screen.
7627         * See also {@link #show()}.
7628         */
7629        public void hide();
7630
7631        /**
7632         * @return true if the CursorController is currently visible
7633         */
7634        public boolean isShowing();
7635
7636        /**
7637         * Update the controller's position.
7638         */
7639        public void updatePosition(HandleView handle, int x, int y);
7640
7641        public void updatePosition();
7642
7643        /**
7644         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
7645         * a chance to become active and/or visible.
7646         * @param event The touch event
7647         */
7648        public boolean onTouchEvent(MotionEvent event);
7649    }
7650
7651    private class HandleView extends View {
7652        private boolean mPositionOnTop = false;
7653        private Drawable mDrawable;
7654        private PopupWindow mContainer;
7655        private int mPositionX;
7656        private int mPositionY;
7657        private CursorController mController;
7658        private boolean mIsDragging;
7659        private float mOffsetX;
7660        private float mOffsetY;
7661        private float mHotspotX;
7662        private float mHotspotY;
7663        private int mLastParentX;
7664        private int mLastParentY;
7665
7666        public HandleView(CursorController controller, Drawable handle) {
7667            super(TextView.this.mContext);
7668            mController = controller;
7669            mDrawable = handle;
7670            mContainer = new PopupWindow(TextView.this.mContext, null,
7671                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7672            mContainer.setSplitTouchEnabled(true);
7673            mContainer.setClippingEnabled(false);
7674
7675            final int handleWidth = mDrawable.getIntrinsicWidth();
7676            final int handleHeight = mDrawable.getIntrinsicHeight();
7677            mHotspotX = handleWidth * 0.5f;
7678            mHotspotY = -handleHeight * 0.2f;
7679        }
7680
7681        @Override
7682        public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
7683            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
7684                    mDrawable.getIntrinsicHeight());
7685        }
7686
7687        public void show() {
7688            if (!isPositionVisible()) {
7689                hide();
7690                return;
7691            }
7692            mContainer.setContentView(this);
7693            final int[] coords = mTempCoords;
7694            TextView.this.getLocationInWindow(coords);
7695            coords[0] += mPositionX;
7696            coords[1] += mPositionY;
7697            mContainer.showAtLocation(TextView.this, 0, coords[0], coords[1]);
7698        }
7699
7700        public void hide() {
7701            mIsDragging = false;
7702            mContainer.dismiss();
7703        }
7704
7705        public boolean isShowing() {
7706            return mContainer.isShowing();
7707        }
7708
7709        private boolean isPositionVisible() {
7710            // Always show a dragging handle.
7711            if (mIsDragging) {
7712                return true;
7713            }
7714
7715            final int extendedPaddingTop = getExtendedPaddingTop();
7716            final int extendedPaddingBottom = getExtendedPaddingBottom();
7717            final int compoundPaddingLeft = getCompoundPaddingLeft();
7718            final int compoundPaddingRight = getCompoundPaddingRight();
7719
7720            final TextView hostView = TextView.this;
7721            final int left = 0;
7722            final int right = hostView.getWidth();
7723            final int top = 0;
7724            final int bottom = hostView.getHeight();
7725
7726            if (mTempRect == null) {
7727                mTempRect = new Rect();
7728            }
7729            final Rect clip = mTempRect;
7730            clip.left = left + compoundPaddingLeft;
7731            clip.top = top + extendedPaddingTop;
7732            clip.right = right - compoundPaddingRight;
7733            clip.bottom = bottom - extendedPaddingBottom;
7734
7735            final ViewParent parent = hostView.getParent();
7736            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
7737                return false;
7738            }
7739
7740            final int[] coords = mTempCoords;
7741            hostView.getLocationInWindow(coords);
7742            final int posX = coords[0] + mPositionX + (int) mHotspotX;
7743            final int posY = coords[1] + mPositionY;
7744
7745            return posX >= clip.left && posX <= clip.right &&
7746                    posY >= clip.top && posY + mHotspotY <= clip.bottom;
7747        }
7748
7749        private void moveTo(int x, int y) {
7750            mPositionX = x - TextView.this.mScrollX;
7751            mPositionY = y - TextView.this.mScrollY;
7752            if (isPositionVisible()) {
7753                int[] coords = null;
7754                if (mContainer.isShowing()){
7755                    coords = mTempCoords;
7756                    TextView.this.getLocationInWindow(coords);
7757                    mContainer.update(coords[0] + mPositionX, coords[1] + mPositionY,
7758                            mRight - mLeft, mBottom - mTop);
7759                } else {
7760                    show();
7761                }
7762
7763                if (mIsDragging) {
7764                    if (coords == null) {
7765                        coords = mTempCoords;
7766                        TextView.this.getLocationInWindow(coords);
7767                    }
7768                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
7769                        mOffsetX += coords[0] - mLastParentX;
7770                        mOffsetY += coords[1] - mLastParentY;
7771                        mLastParentX = coords[0];
7772                        mLastParentY = coords[1];
7773                    }
7774                }
7775            } else {
7776                hide();
7777            }
7778        }
7779
7780        @Override
7781        public void onDraw(Canvas c) {
7782            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
7783            if (mPositionOnTop) {
7784                c.save();
7785                c.rotate(180, (mRight - mLeft) / 2, (mBottom - mTop) / 2);
7786                mDrawable.draw(c);
7787                c.restore();
7788            } else {
7789                mDrawable.draw(c);
7790            }
7791        }
7792
7793        @Override
7794        public boolean onTouchEvent(MotionEvent ev) {
7795            switch (ev.getActionMasked()) {
7796            case MotionEvent.ACTION_DOWN: {
7797                final float rawX = ev.getRawX();
7798                final float rawY = ev.getRawY();
7799                mOffsetX = rawX - mPositionX;
7800                mOffsetY = rawY - mPositionY;
7801                final int[] coords = mTempCoords;
7802                TextView.this.getLocationInWindow(coords);
7803                mLastParentX = coords[0];
7804                mLastParentY = coords[1];
7805                mIsDragging = true;
7806                break;
7807            }
7808            case MotionEvent.ACTION_MOVE: {
7809                final float rawX = ev.getRawX();
7810                final float rawY = ev.getRawY();
7811                final float newPosX = rawX - mOffsetX + mHotspotX;
7812                final float newPosY = rawY - mOffsetY + mHotspotY;
7813
7814                mController.updatePosition(this, (int) Math.round(newPosX),
7815                        (int) Math.round(newPosY));
7816
7817                break;
7818            }
7819            case MotionEvent.ACTION_UP:
7820            case MotionEvent.ACTION_CANCEL:
7821                mIsDragging = false;
7822            }
7823            return true;
7824        }
7825
7826        public boolean isDragging() {
7827            return mIsDragging;
7828        }
7829
7830        void positionAtCursor(final int offset, boolean bottom) {
7831            final int width = mDrawable.getIntrinsicWidth();
7832            final int height = mDrawable.getIntrinsicHeight();
7833            final int line = mLayout.getLineForOffset(offset);
7834            final int lineTop = mLayout.getLineTop(line);
7835            final int lineBottom = mLayout.getLineBottom(line);
7836
7837            final Rect bounds = sCursorControllerTempRect;
7838            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0)
7839                + TextView.this.mScrollX;
7840            bounds.top = (bottom ? lineBottom : lineTop) + TextView.this.mScrollY;
7841
7842            bounds.right = bounds.left + width;
7843            bounds.bottom = bounds.top + height;
7844
7845            convertFromViewportToContentCoordinates(bounds);
7846            moveTo(bounds.left, bounds.top);
7847        }
7848    }
7849
7850    private class InsertionPointCursorController implements CursorController {
7851        private static final int DELAY_BEFORE_FADE_OUT = 4100;
7852
7853        // The cursor controller image
7854        private final HandleView mHandle;
7855
7856        private final Runnable mHider = new Runnable() {
7857            public void run() {
7858                hide();
7859            }
7860        };
7861
7862        InsertionPointCursorController() {
7863            Resources res = mContext.getResources();
7864            mHandle = new HandleView(this, res.getDrawable(mTextSelectHandleRes));
7865        }
7866
7867        public void show() {
7868            updatePosition();
7869            mHandle.show();
7870            hideDelayed(DELAY_BEFORE_FADE_OUT);
7871        }
7872
7873        public void hide() {
7874            mHandle.hide();
7875            TextView.this.removeCallbacks(mHider);
7876        }
7877
7878        private void hideDelayed(int msec) {
7879            TextView.this.removeCallbacks(mHider);
7880            TextView.this.postDelayed(mHider, msec);
7881        }
7882
7883        public boolean isShowing() {
7884            return mHandle.isShowing();
7885        }
7886
7887        public void updatePosition(HandleView handle, int x, int y) {
7888            final int previousOffset = getSelectionStart();
7889            int offset = getHysteresisOffset(x, y, previousOffset);
7890
7891            if (offset != previousOffset) {
7892                Selection.setSelection((Spannable) mText, offset);
7893                updatePosition();
7894            }
7895            hideDelayed(DELAY_BEFORE_FADE_OUT);
7896        }
7897
7898        public void updatePosition() {
7899            final int offset = getSelectionStart();
7900
7901            if (offset < 0) {
7902                // Should never happen, safety check.
7903                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
7904                hide();
7905                return;
7906            }
7907
7908            mHandle.positionAtCursor(offset, true);
7909        }
7910
7911        public boolean onTouchEvent(MotionEvent ev) {
7912            return false;
7913        }
7914
7915        public void onTouchModeChanged(boolean isInTouchMode) {
7916            if (!isInTouchMode) {
7917                hide();
7918            }
7919        }
7920    }
7921
7922    private class SelectionModifierCursorController implements CursorController {
7923        // The cursor controller images
7924        private HandleView mStartHandle, mEndHandle;
7925        // The offsets of that last touch down event. Remembered to start selection there.
7926        private int mMinTouchOffset, mMaxTouchOffset;
7927        // Whether selection anchors are active
7928        private boolean mIsShowing;
7929
7930        private static final int DELAY_BEFORE_FADE_OUT = 4100;
7931
7932        private final Runnable mHider = new Runnable() {
7933            public void run() {
7934                hide();
7935            }
7936        };
7937
7938        SelectionModifierCursorController() {
7939            Resources res = mContext.getResources();
7940            mStartHandle = new HandleView(this, res.getDrawable(mTextSelectHandleLeftRes));
7941            mEndHandle = new HandleView(this, res.getDrawable(mTextSelectHandleRightRes));
7942        }
7943
7944        public void show() {
7945            mIsShowing = true;
7946            updatePosition();
7947            mStartHandle.show();
7948            mEndHandle.show();
7949            hideInsertionPointCursorController();
7950            hideDelayed(DELAY_BEFORE_FADE_OUT);
7951        }
7952
7953        public void hide() {
7954            mStartHandle.hide();
7955            mEndHandle.hide();
7956            mIsShowing = false;
7957            removeCallbacks(mHider);
7958        }
7959
7960        private void hideDelayed(int delay) {
7961            removeCallbacks(mHider);
7962            postDelayed(mHider, delay);
7963        }
7964
7965        public boolean isShowing() {
7966            return mIsShowing;
7967        }
7968
7969        public void cancelFadeOutAnimation() {
7970            hide();
7971        }
7972
7973        public void updatePosition(HandleView handle, int x, int y) {
7974            int selectionStart = getSelectionStart();
7975            int selectionEnd = getSelectionEnd();
7976
7977            final int previousOffset = handle == mStartHandle ? selectionStart : selectionEnd;
7978            int offset = getHysteresisOffset(x, y, previousOffset);
7979
7980            // Handle the case where start and end are swapped, making sure start <= end
7981            if (handle == mStartHandle) {
7982                if (offset <= selectionEnd) {
7983                    if (selectionStart == offset) {
7984                        return; // no change, no need to redraw;
7985                    }
7986                    selectionStart = offset;
7987                } else {
7988                    selectionStart = selectionEnd;
7989                    selectionEnd = offset;
7990                    HandleView temp = mStartHandle;
7991                    mStartHandle = mEndHandle;
7992                    mEndHandle = temp;
7993                }
7994            } else {
7995                if (offset >= selectionStart) {
7996                    if (selectionEnd == offset) {
7997                        return; // no change, no need to redraw;
7998                    }
7999                    selectionEnd = offset;
8000                } else {
8001                    selectionEnd = selectionStart;
8002                    selectionStart = offset;
8003                    HandleView temp = mStartHandle;
8004                    mStartHandle = mEndHandle;
8005                    mEndHandle = temp;
8006                }
8007            }
8008
8009            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8010            updatePosition();
8011        }
8012
8013        public void updatePosition() {
8014            final int selectionStart = getSelectionStart();
8015            final int selectionEnd = getSelectionEnd();
8016
8017            if ((selectionStart < 0) || (selectionEnd < 0)) {
8018                // Should never happen, safety check.
8019                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
8020                hide();
8021                return;
8022            }
8023
8024            boolean oneLineSelection = mLayout.getLineForOffset(selectionStart) ==
8025                    mLayout.getLineForOffset(selectionEnd);
8026            mStartHandle.positionAtCursor(selectionStart, oneLineSelection);
8027            mEndHandle.positionAtCursor(selectionEnd, true);
8028            hideDelayed(DELAY_BEFORE_FADE_OUT);
8029        }
8030
8031        public boolean onTouchEvent(MotionEvent event) {
8032            if (isFocused() && isTextEditable()) {
8033                switch (event.getActionMasked()) {
8034                    case MotionEvent.ACTION_DOWN:
8035                        final int x = (int) event.getX();
8036                        final int y = (int) event.getY();
8037
8038                        // Remember finger down position, to be able to start selection from there
8039                        mMinTouchOffset = mMaxTouchOffset = mLastTouchOffset = getOffset(x, y);
8040
8041                        break;
8042
8043                    case MotionEvent.ACTION_POINTER_DOWN:
8044                    case MotionEvent.ACTION_POINTER_UP:
8045                        // Handle multi-point gestures. Keep min and max offset positions.
8046                        // Only activated for devices that correctly handle multi-touch.
8047                        if (mContext.getPackageManager().hasSystemFeature(
8048                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
8049                            updateMinAndMaxOffsets(event);
8050                        }
8051                        break;
8052                }
8053            }
8054            return false;
8055        }
8056
8057        /**
8058         * @param event
8059         */
8060        private void updateMinAndMaxOffsets(MotionEvent event) {
8061            int pointerCount = event.getPointerCount();
8062            for (int index = 0; index < pointerCount; index++) {
8063                final int x = (int) event.getX(index);
8064                final int y = (int) event.getY(index);
8065                int offset = getOffset(x, y);
8066                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
8067                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
8068            }
8069        }
8070
8071        public int getMinTouchOffset() {
8072            return mMinTouchOffset;
8073        }
8074
8075        public int getMaxTouchOffset() {
8076            return mMaxTouchOffset;
8077        }
8078
8079        /**
8080         * @return true iff this controller is currently used to move the selection start.
8081         */
8082        public boolean isSelectionStartDragged() {
8083            return mStartHandle.isDragging();
8084        }
8085
8086        public void onTouchModeChanged(boolean isInTouchMode) {
8087            if (!isInTouchMode) {
8088                hide();
8089            }
8090        }
8091    }
8092
8093    private void hideInsertionPointCursorController() {
8094        if (mInsertionPointCursorController != null) {
8095            mInsertionPointCursorController.hide();
8096        }
8097    }
8098
8099    private void hideControllers() {
8100        hideInsertionPointCursorController();
8101        stopTextSelectionMode();
8102    }
8103
8104    private int getOffsetForHorizontal(int line, int x) {
8105        x -= getTotalPaddingLeft();
8106        // Clamp the position to inside of the view.
8107        x = Math.max(0, x);
8108        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
8109        x += getScrollX();
8110        return getLayout().getOffsetForHorizontal(line, x);
8111    }
8112
8113    /**
8114     * Get the offset character closest to the specified absolute position.
8115     *
8116     * @param x The horizontal absolute position of a point on screen
8117     * @param y The vertical absolute position of a point on screen
8118     * @return the character offset for the character whose position is closest to the specified
8119     *  position. Returns -1 if there is no layout.
8120     *
8121     * @hide
8122     */
8123    public int getOffset(int x, int y) {
8124        if (getLayout() == null) return -1;
8125
8126        y -= getTotalPaddingTop();
8127        // Clamp the position to inside of the view.
8128        y = Math.max(0, y);
8129        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8130        y += getScrollY();
8131
8132        final int line = getLayout().getLineForVertical(y);
8133        final int offset = getOffsetForHorizontal(line, x);
8134        return offset;
8135    }
8136
8137    int getHysteresisOffset(int x, int y, int previousOffset) {
8138        final Layout layout = getLayout();
8139        if (layout == null) return -1;
8140
8141        y -= getTotalPaddingTop();
8142        // Clamp the position to inside of the view.
8143        y = Math.max(0, y);
8144        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8145        y += getScrollY();
8146
8147        int line = getLayout().getLineForVertical(y);
8148
8149        final int previousLine = layout.getLineForOffset(previousOffset);
8150        final int previousLineTop = layout.getLineTop(previousLine);
8151        final int previousLineBottom = layout.getLineBottom(previousLine);
8152        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 6;
8153
8154        // If new line is just before or after previous line and y position is less than
8155        // hysteresisThreshold away from previous line, keep cursor on previous line.
8156        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
8157            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
8158            line = previousLine;
8159        }
8160
8161        return getOffsetForHorizontal(line, x);
8162    }
8163
8164    @ViewDebug.ExportedProperty
8165    private CharSequence            mText;
8166    private CharSequence            mTransformed;
8167    private BufferType              mBufferType = BufferType.NORMAL;
8168
8169    private int                     mInputType = EditorInfo.TYPE_NULL;
8170    private CharSequence            mHint;
8171    private Layout                  mHintLayout;
8172
8173    private KeyListener             mInput;
8174
8175    private MovementMethod          mMovement;
8176    private TransformationMethod    mTransformation;
8177    private ChangeWatcher           mChangeWatcher;
8178
8179    private ArrayList<TextWatcher>  mListeners = null;
8180
8181    // display attributes
8182    private final TextPaint         mTextPaint;
8183    private boolean                 mUserSetTextScaleX;
8184    private final Paint             mHighlightPaint;
8185    private int                     mHighlightColor = 0xCC475925;
8186    private Layout                  mLayout;
8187
8188    private long                    mShowCursor;
8189    private Blink                   mBlink;
8190    private boolean                 mCursorVisible = true;
8191
8192    // Cursor Controllers. Null when disabled.
8193    private CursorController        mInsertionPointCursorController;
8194    private CursorController        mSelectionModifierCursorController;
8195    private boolean                 mIsInTextSelectionMode = false;
8196    private int                     mLastTouchOffset = -1;
8197    // Created once and shared by different CursorController helper methods.
8198    // Only one cursor controller is active at any time which prevent race conditions.
8199    private static Rect             sCursorControllerTempRect = new Rect();
8200
8201    private boolean                 mSelectAllOnFocus = false;
8202
8203    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
8204    private boolean                 mHorizontallyScrolling;
8205
8206    private int                     mAutoLinkMask;
8207    private boolean                 mLinksClickable = true;
8208
8209    private float                   mSpacingMult = 1;
8210    private float                   mSpacingAdd = 0;
8211
8212    private static final int        LINES = 1;
8213    private static final int        EMS = LINES;
8214    private static final int        PIXELS = 2;
8215
8216    private int                     mMaximum = Integer.MAX_VALUE;
8217    private int                     mMaxMode = LINES;
8218    private int                     mMinimum = 0;
8219    private int                     mMinMode = LINES;
8220
8221    private int                     mMaxWidth = Integer.MAX_VALUE;
8222    private int                     mMaxWidthMode = PIXELS;
8223    private int                     mMinWidth = 0;
8224    private int                     mMinWidthMode = PIXELS;
8225
8226    private boolean                 mSingleLine;
8227    private int                     mDesiredHeightAtMeasure = -1;
8228    private boolean                 mIncludePad = true;
8229
8230    // tmp primitives, so we don't alloc them on each draw
8231    private Path                    mHighlightPath;
8232    private boolean                 mHighlightPathBogus = true;
8233    private static final RectF      sTempRect = new RectF();
8234
8235    // XXX should be much larger
8236    private static final int        VERY_WIDE = 16384;
8237
8238    private static final int        BLINK = 500;
8239
8240    private static final int ANIMATED_SCROLL_GAP = 250;
8241    private long mLastScroll;
8242    private Scroller mScroller = null;
8243
8244    private BoringLayout.Metrics mBoring;
8245    private BoringLayout.Metrics mHintBoring;
8246
8247    private BoringLayout mSavedLayout, mSavedHintLayout;
8248
8249    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
8250    private InputFilter[] mFilters = NO_FILTERS;
8251    private static final Spanned EMPTY_SPANNED = new SpannedString("");
8252}
8253