TextView.java revision 770a681b2f5b00e699920317bff04a24676ae143 
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.ArrowKeyMovementMethod;
67import android.text.method.DateKeyListener;
68import android.text.method.DateTimeKeyListener;
69import android.text.method.DialerKeyListener;
70import android.text.method.DigitsKeyListener;
71import android.text.method.KeyListener;
72import android.text.method.LinkMovementMethod;
73import android.text.method.MetaKeyKeyListener;
74import android.text.method.MovementMethod;
75import android.text.method.PasswordTransformationMethod;
76import android.text.method.SingleLineTransformationMethod;
77import android.text.method.TextKeyListener;
78import android.text.method.TimeKeyListener;
79import android.text.method.TransformationMethod;
80import android.text.style.ParagraphStyle;
81import android.text.style.URLSpan;
82import android.text.style.UpdateAppearance;
83import android.text.util.Linkify;
84import android.util.AttributeSet;
85import android.util.FloatMath;
86import android.util.Log;
87import android.util.TypedValue;
88import android.view.ContextMenu;
89import android.view.Gravity;
90import android.view.KeyEvent;
91import android.view.LayoutInflater;
92import android.view.MenuItem;
93import android.view.MotionEvent;
94import android.view.View;
95import android.view.ViewConfiguration;
96import android.view.ViewDebug;
97import android.view.ViewGroup.LayoutParams;
98import android.view.ViewRoot;
99import android.view.ViewTreeObserver;
100import android.view.accessibility.AccessibilityEvent;
101import android.view.accessibility.AccessibilityManager;
102import android.view.animation.AnimationUtils;
103import android.view.inputmethod.BaseInputConnection;
104import android.view.inputmethod.CompletionInfo;
105import android.view.inputmethod.EditorInfo;
106import android.view.inputmethod.ExtractedText;
107import android.view.inputmethod.ExtractedTextRequest;
108import android.view.inputmethod.InputConnection;
109import android.view.inputmethod.InputMethodManager;
110import android.widget.RemoteViews.RemoteView;
111
112import java.io.IOException;
113import java.lang.ref.WeakReference;
114import java.util.ArrayList;
115
116/**
117 * Displays text to the user and optionally allows them to edit it.  A TextView
118 * is a complete text editor, however the basic class is configured to not
119 * allow editing; see {@link EditText} for a subclass that configures the text
120 * view for editing.
121 *
122 * <p>
123 * <b>XML attributes</b>
124 * <p>
125 * See {@link android.R.styleable#TextView TextView Attributes},
126 * {@link android.R.styleable#View View Attributes}
127 *
128 * @attr ref android.R.styleable#TextView_text
129 * @attr ref android.R.styleable#TextView_bufferType
130 * @attr ref android.R.styleable#TextView_hint
131 * @attr ref android.R.styleable#TextView_textColor
132 * @attr ref android.R.styleable#TextView_textColorHighlight
133 * @attr ref android.R.styleable#TextView_textColorHint
134 * @attr ref android.R.styleable#TextView_textAppearance
135 * @attr ref android.R.styleable#TextView_textColorLink
136 * @attr ref android.R.styleable#TextView_textSize
137 * @attr ref android.R.styleable#TextView_textScaleX
138 * @attr ref android.R.styleable#TextView_typeface
139 * @attr ref android.R.styleable#TextView_textStyle
140 * @attr ref android.R.styleable#TextView_cursorVisible
141 * @attr ref android.R.styleable#TextView_maxLines
142 * @attr ref android.R.styleable#TextView_maxHeight
143 * @attr ref android.R.styleable#TextView_lines
144 * @attr ref android.R.styleable#TextView_height
145 * @attr ref android.R.styleable#TextView_minLines
146 * @attr ref android.R.styleable#TextView_minHeight
147 * @attr ref android.R.styleable#TextView_maxEms
148 * @attr ref android.R.styleable#TextView_maxWidth
149 * @attr ref android.R.styleable#TextView_ems
150 * @attr ref android.R.styleable#TextView_width
151 * @attr ref android.R.styleable#TextView_minEms
152 * @attr ref android.R.styleable#TextView_minWidth
153 * @attr ref android.R.styleable#TextView_gravity
154 * @attr ref android.R.styleable#TextView_scrollHorizontally
155 * @attr ref android.R.styleable#TextView_password
156 * @attr ref android.R.styleable#TextView_singleLine
157 * @attr ref android.R.styleable#TextView_selectAllOnFocus
158 * @attr ref android.R.styleable#TextView_includeFontPadding
159 * @attr ref android.R.styleable#TextView_maxLength
160 * @attr ref android.R.styleable#TextView_shadowColor
161 * @attr ref android.R.styleable#TextView_shadowDx
162 * @attr ref android.R.styleable#TextView_shadowDy
163 * @attr ref android.R.styleable#TextView_shadowRadius
164 * @attr ref android.R.styleable#TextView_autoLink
165 * @attr ref android.R.styleable#TextView_linksClickable
166 * @attr ref android.R.styleable#TextView_numeric
167 * @attr ref android.R.styleable#TextView_digits
168 * @attr ref android.R.styleable#TextView_phoneNumber
169 * @attr ref android.R.styleable#TextView_inputMethod
170 * @attr ref android.R.styleable#TextView_capitalize
171 * @attr ref android.R.styleable#TextView_autoText
172 * @attr ref android.R.styleable#TextView_editable
173 * @attr ref android.R.styleable#TextView_freezesText
174 * @attr ref android.R.styleable#TextView_ellipsize
175 * @attr ref android.R.styleable#TextView_drawableTop
176 * @attr ref android.R.styleable#TextView_drawableBottom
177 * @attr ref android.R.styleable#TextView_drawableRight
178 * @attr ref android.R.styleable#TextView_drawableLeft
179 * @attr ref android.R.styleable#TextView_drawablePadding
180 * @attr ref android.R.styleable#TextView_lineSpacingExtra
181 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
182 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
183 * @attr ref android.R.styleable#TextView_inputType
184 * @attr ref android.R.styleable#TextView_imeOptions
185 * @attr ref android.R.styleable#TextView_privateImeOptions
186 * @attr ref android.R.styleable#TextView_imeActionLabel
187 * @attr ref android.R.styleable#TextView_imeActionId
188 * @attr ref android.R.styleable#TextView_editorExtras
189 */
190@RemoteView
191public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
192    static final String LOG_TAG = "TextView";
193    static final boolean DEBUG_EXTRACT = false;
194
195    private static int PRIORITY = 100;
196
197    private final int[] mTempCoords = new int[2];
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 canSelectText, 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 canSelectText, 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
3756    @Override
3757    protected void onDetachedFromWindow() {
3758        super.onDetachedFromWindow();
3759
3760        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3761            final ViewTreeObserver observer = getViewTreeObserver();
3762            if (observer != null) {
3763                observer.removeOnPreDrawListener(this);
3764                mPreDrawState = PREDRAW_NOT_REGISTERED;
3765            }
3766        }
3767
3768        if (mError != null) {
3769            hideError();
3770        }
3771    }
3772
3773    @Override
3774    protected boolean isPaddingOffsetRequired() {
3775        return mShadowRadius != 0 || mDrawables != null;
3776    }
3777
3778    @Override
3779    protected int getLeftPaddingOffset() {
3780        return getCompoundPaddingLeft() - mPaddingLeft +
3781                (int) Math.min(0, mShadowDx - mShadowRadius);
3782    }
3783
3784    @Override
3785    protected int getTopPaddingOffset() {
3786        return (int) Math.min(0, mShadowDy - mShadowRadius);
3787    }
3788
3789    @Override
3790    protected int getBottomPaddingOffset() {
3791        return (int) Math.max(0, mShadowDy + mShadowRadius);
3792    }
3793
3794    @Override
3795    protected int getRightPaddingOffset() {
3796        return -(getCompoundPaddingRight() - mPaddingRight) +
3797                (int) Math.max(0, mShadowDx + mShadowRadius);
3798    }
3799
3800    @Override
3801    protected boolean verifyDrawable(Drawable who) {
3802        final boolean verified = super.verifyDrawable(who);
3803        if (!verified && mDrawables != null) {
3804            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
3805                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
3806        }
3807        return verified;
3808    }
3809
3810    @Override
3811    public void invalidateDrawable(Drawable drawable) {
3812        if (verifyDrawable(drawable)) {
3813            final Rect dirty = drawable.getBounds();
3814            int scrollX = mScrollX;
3815            int scrollY = mScrollY;
3816
3817            // IMPORTANT: The coordinates below are based on the coordinates computed
3818            // for each compound drawable in onDraw(). Make sure to update each section
3819            // accordingly.
3820            final TextView.Drawables drawables = mDrawables;
3821            if (drawables != null) {
3822                if (drawable == drawables.mDrawableLeft) {
3823                    final int compoundPaddingTop = getCompoundPaddingTop();
3824                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3825                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3826
3827                    scrollX += mPaddingLeft;
3828                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
3829                } else if (drawable == drawables.mDrawableRight) {
3830                    final int compoundPaddingTop = getCompoundPaddingTop();
3831                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3832                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3833
3834                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
3835                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
3836                } else if (drawable == drawables.mDrawableTop) {
3837                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3838                    final int compoundPaddingRight = getCompoundPaddingRight();
3839                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3840
3841                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
3842                    scrollY += mPaddingTop;
3843                } else if (drawable == drawables.mDrawableBottom) {
3844                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3845                    final int compoundPaddingRight = getCompoundPaddingRight();
3846                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3847
3848                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
3849                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
3850                }
3851            }
3852
3853            invalidate(dirty.left + scrollX, dirty.top + scrollY,
3854                    dirty.right + scrollX, dirty.bottom + scrollY);
3855        }
3856    }
3857
3858    @Override
3859    protected void onDraw(Canvas canvas) {
3860        restartMarqueeIfNeeded();
3861
3862        // Draw the background for this view
3863        super.onDraw(canvas);
3864
3865        final int compoundPaddingLeft = getCompoundPaddingLeft();
3866        final int compoundPaddingTop = getCompoundPaddingTop();
3867        final int compoundPaddingRight = getCompoundPaddingRight();
3868        final int compoundPaddingBottom = getCompoundPaddingBottom();
3869        final int scrollX = mScrollX;
3870        final int scrollY = mScrollY;
3871        final int right = mRight;
3872        final int left = mLeft;
3873        final int bottom = mBottom;
3874        final int top = mTop;
3875
3876        final Drawables dr = mDrawables;
3877        if (dr != null) {
3878            /*
3879             * Compound, not extended, because the icon is not clipped
3880             * if the text height is smaller.
3881             */
3882
3883            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
3884            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
3885
3886            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3887            // Make sure to update invalidateDrawable() when changing this code.
3888            if (dr.mDrawableLeft != null) {
3889                canvas.save();
3890                canvas.translate(scrollX + mPaddingLeft,
3891                                 scrollY + compoundPaddingTop +
3892                                 (vspace - dr.mDrawableHeightLeft) / 2);
3893                dr.mDrawableLeft.draw(canvas);
3894                canvas.restore();
3895            }
3896
3897            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3898            // Make sure to update invalidateDrawable() when changing this code.
3899            if (dr.mDrawableRight != null) {
3900                canvas.save();
3901                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
3902                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
3903                dr.mDrawableRight.draw(canvas);
3904                canvas.restore();
3905            }
3906
3907            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3908            // Make sure to update invalidateDrawable() when changing this code.
3909            if (dr.mDrawableTop != null) {
3910                canvas.save();
3911                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
3912                        scrollY + mPaddingTop);
3913                dr.mDrawableTop.draw(canvas);
3914                canvas.restore();
3915            }
3916
3917            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3918            // Make sure to update invalidateDrawable() when changing this code.
3919            if (dr.mDrawableBottom != null) {
3920                canvas.save();
3921                canvas.translate(scrollX + compoundPaddingLeft +
3922                        (hspace - dr.mDrawableWidthBottom) / 2,
3923                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
3924                dr.mDrawableBottom.draw(canvas);
3925                canvas.restore();
3926            }
3927        }
3928
3929        if (mPreDrawState == PREDRAW_DONE) {
3930            final ViewTreeObserver observer = getViewTreeObserver();
3931            if (observer != null) {
3932                observer.removeOnPreDrawListener(this);
3933                mPreDrawState = PREDRAW_NOT_REGISTERED;
3934            }
3935        }
3936
3937        int color = mCurTextColor;
3938
3939        if (mLayout == null) {
3940            assumeLayout();
3941        }
3942
3943        Layout layout = mLayout;
3944        int cursorcolor = color;
3945
3946        if (mHint != null && mText.length() == 0) {
3947            if (mHintTextColor != null) {
3948                color = mCurHintTextColor;
3949            }
3950
3951            layout = mHintLayout;
3952        }
3953
3954        mTextPaint.setColor(color);
3955        mTextPaint.drawableState = getDrawableState();
3956
3957        canvas.save();
3958        /*  Would be faster if we didn't have to do this. Can we chop the
3959            (displayable) text so that we don't need to do this ever?
3960        */
3961
3962        int extendedPaddingTop = getExtendedPaddingTop();
3963        int extendedPaddingBottom = getExtendedPaddingBottom();
3964
3965        float clipLeft = compoundPaddingLeft + scrollX;
3966        float clipTop = extendedPaddingTop + scrollY;
3967        float clipRight = right - left - compoundPaddingRight + scrollX;
3968        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
3969
3970        if (mShadowRadius != 0) {
3971            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
3972            clipRight += Math.max(0, mShadowDx + mShadowRadius);
3973
3974            clipTop += Math.min(0, mShadowDy - mShadowRadius);
3975            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
3976        }
3977
3978        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
3979
3980        int voffsetText = 0;
3981        int voffsetCursor = 0;
3982
3983        // translate in by our padding
3984        {
3985            /* shortcircuit calling getVerticaOffset() */
3986            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
3987                voffsetText = getVerticalOffset(false);
3988                voffsetCursor = getVerticalOffset(true);
3989            }
3990            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
3991        }
3992
3993        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3994            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
3995                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
3996                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
3997                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
3998            }
3999
4000            if (mMarquee != null && mMarquee.isRunning()) {
4001                canvas.translate(-mMarquee.mScroll, 0.0f);
4002            }
4003        }
4004
4005        Path highlight = null;
4006        int selStart = -1, selEnd = -1;
4007
4008        //  If there is no movement method, then there can be no selection.
4009        //  Check that first and attempt to skip everything having to do with
4010        //  the cursor.
4011        //  XXX This is not strictly true -- a program could set the
4012        //  selection manually if it really wanted to.
4013        if (mMovement != null && (isFocused() || isPressed())) {
4014            selStart = getSelectionStart();
4015            selEnd = getSelectionEnd();
4016
4017            if (mCursorVisible && selStart >= 0 && isEnabled()) {
4018                if (mHighlightPath == null)
4019                    mHighlightPath = new Path();
4020
4021                if (selStart == selEnd) {
4022                    if ((SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4023                        if (mHighlightPathBogus) {
4024                            mHighlightPath.reset();
4025                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4026                            mHighlightPathBogus = false;
4027                        }
4028
4029                        // XXX should pass to skin instead of drawing directly
4030                        mHighlightPaint.setColor(cursorcolor);
4031                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4032
4033                        highlight = mHighlightPath;
4034                    }
4035                } else {
4036                    if (mHighlightPathBogus) {
4037                        mHighlightPath.reset();
4038                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4039                        mHighlightPathBogus = false;
4040                    }
4041
4042                    // XXX should pass to skin instead of drawing directly
4043                    mHighlightPaint.setColor(mHighlightColor);
4044                    mHighlightPaint.setStyle(Paint.Style.FILL);
4045
4046                    highlight = mHighlightPath;
4047                }
4048            }
4049        }
4050
4051        /*  Comment out until we decide what to do about animations
4052        boolean isLinearTextOn = false;
4053        if (currentTransformation != null) {
4054            isLinearTextOn = mTextPaint.isLinearTextOn();
4055            Matrix m = currentTransformation.getMatrix();
4056            if (!m.isIdentity()) {
4057                // mTextPaint.setLinearTextOn(true);
4058            }
4059        }
4060        */
4061
4062        final InputMethodState ims = mInputMethodState;
4063        if (ims != null && ims.mBatchEditNesting == 0) {
4064            InputMethodManager imm = InputMethodManager.peekInstance();
4065            if (imm != null) {
4066                if (imm.isActive(this)) {
4067                    boolean reported = false;
4068                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4069                        // We are in extract mode and the content has changed
4070                        // in some way... just report complete new text to the
4071                        // input method.
4072                        reported = reportExtractedText();
4073                    }
4074                    if (!reported && highlight != null) {
4075                        int candStart = -1;
4076                        int candEnd = -1;
4077                        if (mText instanceof Spannable) {
4078                            Spannable sp = (Spannable)mText;
4079                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4080                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4081                        }
4082                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4083                    }
4084                }
4085
4086                if (imm.isWatchingCursor(this) && highlight != null) {
4087                    highlight.computeBounds(ims.mTmpRectF, true);
4088                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4089
4090                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4091                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4092
4093                    ims.mTmpRectF.offset(0, voffsetCursor - voffsetText);
4094
4095                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4096                            (int)(ims.mTmpRectF.top + 0.5),
4097                            (int)(ims.mTmpRectF.right + 0.5),
4098                            (int)(ims.mTmpRectF.bottom + 0.5));
4099
4100                    imm.updateCursor(this,
4101                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4102                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4103                }
4104            }
4105        }
4106
4107        layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4108
4109        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4110            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4111            layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4112        }
4113
4114        /*  Comment out until we decide what to do about animations
4115        if (currentTransformation != null) {
4116            mTextPaint.setLinearTextOn(isLinearTextOn);
4117        }
4118        */
4119
4120        canvas.restore();
4121    }
4122
4123    @Override
4124    public void getFocusedRect(Rect r) {
4125        if (mLayout == null) {
4126            super.getFocusedRect(r);
4127            return;
4128        }
4129
4130        int sel = getSelectionEnd();
4131        if (sel < 0) {
4132            super.getFocusedRect(r);
4133            return;
4134        }
4135
4136        int line = mLayout.getLineForOffset(sel);
4137        r.top = mLayout.getLineTop(line);
4138        r.bottom = mLayout.getLineBottom(line);
4139
4140        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4141        r.right = r.left + 1;
4142
4143        // Adjust for padding and gravity.
4144        int paddingLeft = getCompoundPaddingLeft();
4145        int paddingTop = getExtendedPaddingTop();
4146        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4147            paddingTop += getVerticalOffset(false);
4148        }
4149        r.offset(paddingLeft, paddingTop);
4150    }
4151
4152    /**
4153     * Return the number of lines of text, or 0 if the internal Layout has not
4154     * been built.
4155     */
4156    public int getLineCount() {
4157        return mLayout != null ? mLayout.getLineCount() : 0;
4158    }
4159
4160    /**
4161     * Return the baseline for the specified line (0...getLineCount() - 1)
4162     * If bounds is not null, return the top, left, right, bottom extents
4163     * of the specified line in it. If the internal Layout has not been built,
4164     * return 0 and set bounds to (0, 0, 0, 0)
4165     * @param line which line to examine (0..getLineCount() - 1)
4166     * @param bounds Optional. If not null, it returns the extent of the line
4167     * @return the Y-coordinate of the baseline
4168     */
4169    public int getLineBounds(int line, Rect bounds) {
4170        if (mLayout == null) {
4171            if (bounds != null) {
4172                bounds.set(0, 0, 0, 0);
4173            }
4174            return 0;
4175        }
4176        else {
4177            int baseline = mLayout.getLineBounds(line, bounds);
4178
4179            int voffset = getExtendedPaddingTop();
4180            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4181                voffset += getVerticalOffset(true);
4182            }
4183            if (bounds != null) {
4184                bounds.offset(getCompoundPaddingLeft(), voffset);
4185            }
4186            return baseline + voffset;
4187        }
4188    }
4189
4190    @Override
4191    public int getBaseline() {
4192        if (mLayout == null) {
4193            return super.getBaseline();
4194        }
4195
4196        int voffset = 0;
4197        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4198            voffset = getVerticalOffset(true);
4199        }
4200
4201        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4202    }
4203
4204    @Override
4205    public boolean onKeyDown(int keyCode, KeyEvent event) {
4206        int which = doKeyDown(keyCode, event, null);
4207        if (which == 0) {
4208            // Go through default dispatching.
4209            return super.onKeyDown(keyCode, event);
4210        }
4211
4212        return true;
4213    }
4214
4215    @Override
4216    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4217        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4218
4219        int which = doKeyDown(keyCode, down, event);
4220        if (which == 0) {
4221            // Go through default dispatching.
4222            return super.onKeyMultiple(keyCode, repeatCount, event);
4223        }
4224        if (which == -1) {
4225            // Consumed the whole thing.
4226            return true;
4227        }
4228
4229        repeatCount--;
4230
4231        // We are going to dispatch the remaining events to either the input
4232        // or movement method.  To do this, we will just send a repeated stream
4233        // of down and up events until we have done the complete repeatCount.
4234        // It would be nice if those interfaces had an onKeyMultiple() method,
4235        // but adding that is a more complicated change.
4236        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4237        if (which == 1) {
4238            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4239            while (--repeatCount > 0) {
4240                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4241                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4242            }
4243            if (mError != null && !mErrorWasChanged) {
4244                setError(null, null);
4245            }
4246
4247        } else if (which == 2) {
4248            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4249            while (--repeatCount > 0) {
4250                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4251                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4252            }
4253        }
4254
4255        return true;
4256    }
4257
4258    /**
4259     * Returns true if pressing ENTER in this field advances focus instead
4260     * of inserting the character.  This is true mostly in single-line fields,
4261     * but also in mail addresses and subjects which will display on multiple
4262     * lines but where it doesn't make sense to insert newlines.
4263     */
4264    private boolean shouldAdvanceFocusOnEnter() {
4265        if (mInput == null) {
4266            return false;
4267        }
4268
4269        if (mSingleLine) {
4270            return true;
4271        }
4272
4273        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4274            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4275
4276            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
4277                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4278                return true;
4279            }
4280        }
4281
4282        return false;
4283    }
4284
4285    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4286        if (!isEnabled()) {
4287            return 0;
4288        }
4289
4290        switch (keyCode) {
4291            case KeyEvent.KEYCODE_ENTER:
4292                // If ALT modifier is held, then we always insert a
4293                // newline character.
4294                if ((event.getMetaState()&KeyEvent.META_ALT_ON) == 0) {
4295
4296                    // When mInputContentType is set, we know that we are
4297                    // running in a "modern" cupcake environment, so don't need
4298                    // to worry about the application trying to capture
4299                    // enter key events.
4300                    if (mInputContentType != null) {
4301
4302                        // If there is an action listener, given them a
4303                        // chance to consume the event.
4304                        if (mInputContentType.onEditorActionListener != null &&
4305                                mInputContentType.onEditorActionListener.onEditorAction(
4306                                this, EditorInfo.IME_NULL, event)) {
4307                            mInputContentType.enterDown = true;
4308                            // We are consuming the enter key for them.
4309                            return -1;
4310                        }
4311                    }
4312
4313                    // If our editor should move focus when enter is pressed, or
4314                    // this is a generated event from an IME action button, then
4315                    // don't let it be inserted into the text.
4316                    if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4317                            || shouldAdvanceFocusOnEnter()) {
4318                        return -1;
4319                    }
4320                }
4321                break;
4322
4323            case KeyEvent.KEYCODE_DPAD_CENTER:
4324                if (shouldAdvanceFocusOnEnter()) {
4325                    return 0;
4326                }
4327                break;
4328
4329                // Has to be done on key down (and not on key up) to correctly be intercepted.
4330            case KeyEvent.KEYCODE_BACK:
4331                if (mIsInTextSelectionMode) {
4332                    stopTextSelectionMode();
4333                    return -1;
4334                }
4335                break;
4336        }
4337
4338        if (mInput != null) {
4339            /*
4340             * Keep track of what the error was before doing the input
4341             * so that if an input filter changed the error, we leave
4342             * that error showing.  Otherwise, we take down whatever
4343             * error was showing when the user types something.
4344             */
4345            mErrorWasChanged = false;
4346
4347            boolean doDown = true;
4348            if (otherEvent != null) {
4349                try {
4350                    beginBatchEdit();
4351                    boolean handled = mInput.onKeyOther(this, (Editable) mText,
4352                            otherEvent);
4353                    if (mError != null && !mErrorWasChanged) {
4354                        setError(null, null);
4355                    }
4356                    doDown = false;
4357                    if (handled) {
4358                        return -1;
4359                    }
4360                } catch (AbstractMethodError e) {
4361                    // onKeyOther was added after 1.0, so if it isn't
4362                    // implemented we need to try to dispatch as a regular down.
4363                } finally {
4364                    endBatchEdit();
4365                }
4366            }
4367
4368            if (doDown) {
4369                beginBatchEdit();
4370                if (mInput.onKeyDown(this, (Editable) mText, keyCode, event)) {
4371                    endBatchEdit();
4372                    if (mError != null && !mErrorWasChanged) {
4373                        setError(null, null);
4374                    }
4375                    return 1;
4376                }
4377                endBatchEdit();
4378            }
4379        }
4380
4381        // bug 650865: sometimes we get a key event before a layout.
4382        // don't try to move around if we don't know the layout.
4383
4384        if (mMovement != null && mLayout != null) {
4385            boolean doDown = true;
4386            if (otherEvent != null) {
4387                try {
4388                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4389                            otherEvent);
4390                    doDown = false;
4391                    if (handled) {
4392                        return -1;
4393                    }
4394                } catch (AbstractMethodError e) {
4395                    // onKeyOther was added after 1.0, so if it isn't
4396                    // implemented we need to try to dispatch as a regular down.
4397                }
4398            }
4399            if (doDown) {
4400                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4401                    return 2;
4402            }
4403        }
4404
4405        return 0;
4406    }
4407
4408    @Override
4409    public boolean onKeyUp(int keyCode, KeyEvent event) {
4410        if (!isEnabled()) {
4411            return super.onKeyUp(keyCode, event);
4412        }
4413
4414        hideControllers();
4415
4416        switch (keyCode) {
4417            case KeyEvent.KEYCODE_DPAD_CENTER:
4418                /*
4419                 * If there is a click listener, just call through to
4420                 * super, which will invoke it.
4421                 *
4422                 * If there isn't a click listener, try to show the soft
4423                 * input method.  (It will also
4424                 * call performClick(), but that won't do anything in
4425                 * this case.)
4426                 */
4427                if (mOnClickListener == null) {
4428                    if (mMovement != null && mText instanceof Editable
4429                            && mLayout != null && onCheckIsTextEditor()) {
4430                        InputMethodManager imm = (InputMethodManager)
4431                                getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
4432                        imm.showSoftInput(this, 0);
4433                    }
4434                }
4435                return super.onKeyUp(keyCode, event);
4436
4437            case KeyEvent.KEYCODE_ENTER:
4438                if (mInputContentType != null
4439                        && mInputContentType.onEditorActionListener != null
4440                        && mInputContentType.enterDown) {
4441                    mInputContentType.enterDown = false;
4442                    if (mInputContentType.onEditorActionListener.onEditorAction(
4443                            this, EditorInfo.IME_NULL, event)) {
4444                        return true;
4445                    }
4446                }
4447
4448                if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4449                        || shouldAdvanceFocusOnEnter()) {
4450                    /*
4451                     * If there is a click listener, just call through to
4452                     * super, which will invoke it.
4453                     *
4454                     * If there isn't a click listener, try to advance focus,
4455                     * but still call through to super, which will reset the
4456                     * pressed state and longpress state.  (It will also
4457                     * call performClick(), but that won't do anything in
4458                     * this case.)
4459                     */
4460                    if (mOnClickListener == null) {
4461                        View v = focusSearch(FOCUS_DOWN);
4462
4463                        if (v != null) {
4464                            if (!v.requestFocus(FOCUS_DOWN)) {
4465                                throw new IllegalStateException("focus search returned a view " +
4466                                        "that wasn't able to take focus!");
4467                            }
4468
4469                            /*
4470                             * Return true because we handled the key; super
4471                             * will return false because there was no click
4472                             * listener.
4473                             */
4474                            super.onKeyUp(keyCode, event);
4475                            return true;
4476                        } else if ((event.getFlags()
4477                                & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4478                            // No target for next focus, but make sure the IME
4479                            // if this came from it.
4480                            InputMethodManager imm = InputMethodManager.peekInstance();
4481                            if (imm != null) {
4482                                imm.hideSoftInputFromWindow(getWindowToken(), 0);
4483                            }
4484                        }
4485                    }
4486
4487                    return super.onKeyUp(keyCode, event);
4488                }
4489                break;
4490        }
4491
4492        if (mInput != null)
4493            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4494                return true;
4495
4496        if (mMovement != null && mLayout != null)
4497            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4498                return true;
4499
4500        return super.onKeyUp(keyCode, event);
4501    }
4502
4503    @Override public boolean onCheckIsTextEditor() {
4504        return mInputType != EditorInfo.TYPE_NULL;
4505    }
4506
4507    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4508        if (onCheckIsTextEditor()) {
4509            if (mInputMethodState == null) {
4510                mInputMethodState = new InputMethodState();
4511            }
4512            outAttrs.inputType = mInputType;
4513            if (mInputContentType != null) {
4514                outAttrs.imeOptions = mInputContentType.imeOptions;
4515                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4516                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4517                outAttrs.actionId = mInputContentType.imeActionId;
4518                outAttrs.extras = mInputContentType.extras;
4519            } else {
4520                outAttrs.imeOptions = EditorInfo.IME_NULL;
4521            }
4522            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4523                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4524                if (focusSearch(FOCUS_DOWN) != null) {
4525                    // An action has not been set, but the enter key will move to
4526                    // the next focus, so set the action to that.
4527                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4528                } else {
4529                    // An action has not been set, and there is no focus to move
4530                    // to, so let's just supply a "done" action.
4531                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4532                }
4533                if (!shouldAdvanceFocusOnEnter()) {
4534                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4535                }
4536            }
4537            if ((outAttrs.inputType & (InputType.TYPE_MASK_CLASS
4538                    | InputType.TYPE_TEXT_FLAG_MULTI_LINE))
4539                    == (InputType.TYPE_CLASS_TEXT
4540                            | InputType.TYPE_TEXT_FLAG_MULTI_LINE)) {
4541                // Multi-line text editors should always show an enter key.
4542                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4543            }
4544            outAttrs.hintText = mHint;
4545            if (mText instanceof Editable) {
4546                InputConnection ic = new EditableInputConnection(this);
4547                outAttrs.initialSelStart = getSelectionStart();
4548                outAttrs.initialSelEnd = getSelectionEnd();
4549                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4550                return ic;
4551            }
4552        }
4553        return null;
4554    }
4555
4556    /**
4557     * If this TextView contains editable content, extract a portion of it
4558     * based on the information in <var>request</var> in to <var>outText</var>.
4559     * @return Returns true if the text was successfully extracted, else false.
4560     */
4561    public boolean extractText(ExtractedTextRequest request,
4562            ExtractedText outText) {
4563        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4564                EXTRACT_UNKNOWN, outText);
4565    }
4566
4567    static final int EXTRACT_NOTHING = -2;
4568    static final int EXTRACT_UNKNOWN = -1;
4569
4570    boolean extractTextInternal(ExtractedTextRequest request,
4571            int partialStartOffset, int partialEndOffset, int delta,
4572            ExtractedText outText) {
4573        final CharSequence content = mText;
4574        if (content != null) {
4575            if (partialStartOffset != EXTRACT_NOTHING) {
4576                final int N = content.length();
4577                if (partialStartOffset < 0) {
4578                    outText.partialStartOffset = outText.partialEndOffset = -1;
4579                    partialStartOffset = 0;
4580                    partialEndOffset = N;
4581                } else {
4582                    // Now use the delta to determine the actual amount of text
4583                    // we need.
4584                    partialEndOffset += delta;
4585                    // Adjust offsets to ensure we contain full spans.
4586                    if (content instanceof Spanned) {
4587                        Spanned spanned = (Spanned)content;
4588                        Object[] spans = spanned.getSpans(partialStartOffset,
4589                                partialEndOffset, ParcelableSpan.class);
4590                        int i = spans.length;
4591                        while (i > 0) {
4592                            i--;
4593                            int j = spanned.getSpanStart(spans[i]);
4594                            if (j < partialStartOffset) partialStartOffset = j;
4595                            j = spanned.getSpanEnd(spans[i]);
4596                            if (j > partialEndOffset) partialEndOffset = j;
4597                        }
4598                    }
4599                    outText.partialStartOffset = partialStartOffset;
4600                    outText.partialEndOffset = partialEndOffset - delta;
4601
4602                    if (partialStartOffset > N) {
4603                        partialStartOffset = N;
4604                    } else if (partialStartOffset < 0) {
4605                        partialStartOffset = 0;
4606                    }
4607                    if (partialEndOffset > N) {
4608                        partialEndOffset = N;
4609                    } else if (partialEndOffset < 0) {
4610                        partialEndOffset = 0;
4611                    }
4612                }
4613                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
4614                    outText.text = content.subSequence(partialStartOffset,
4615                            partialEndOffset);
4616                } else {
4617                    outText.text = TextUtils.substring(content, partialStartOffset,
4618                            partialEndOffset);
4619                }
4620            } else {
4621                outText.partialStartOffset = 0;
4622                outText.partialEndOffset = 0;
4623                outText.text = "";
4624            }
4625            outText.flags = 0;
4626            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
4627                outText.flags |= ExtractedText.FLAG_SELECTING;
4628            }
4629            if (mSingleLine) {
4630                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
4631            }
4632            outText.startOffset = 0;
4633            outText.selectionStart = getSelectionStart();
4634            outText.selectionEnd = getSelectionEnd();
4635            return true;
4636        }
4637        return false;
4638    }
4639
4640    boolean reportExtractedText() {
4641        final InputMethodState ims = mInputMethodState;
4642        if (ims != null) {
4643            final boolean contentChanged = ims.mContentChanged;
4644            if (contentChanged || ims.mSelectionModeChanged) {
4645                ims.mContentChanged = false;
4646                ims.mSelectionModeChanged = false;
4647                final ExtractedTextRequest req = mInputMethodState.mExtracting;
4648                if (req != null) {
4649                    InputMethodManager imm = InputMethodManager.peekInstance();
4650                    if (imm != null) {
4651                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
4652                                + ims.mChangedStart + " end=" + ims.mChangedEnd
4653                                + " delta=" + ims.mChangedDelta);
4654                        if (ims.mChangedStart < 0 && !contentChanged) {
4655                            ims.mChangedStart = EXTRACT_NOTHING;
4656                        }
4657                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
4658                                ims.mChangedDelta, ims.mTmpExtracted)) {
4659                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
4660                                    + ims.mTmpExtracted.partialStartOffset
4661                                    + " end=" + ims.mTmpExtracted.partialEndOffset
4662                                    + ": " + ims.mTmpExtracted.text);
4663                            imm.updateExtractedText(this, req.token,
4664                                    mInputMethodState.mTmpExtracted);
4665                            ims.mChangedStart = EXTRACT_UNKNOWN;
4666                            ims.mChangedEnd = EXTRACT_UNKNOWN;
4667                            ims.mChangedDelta = 0;
4668                            ims.mContentChanged = false;
4669                            return true;
4670                        }
4671                    }
4672                }
4673            }
4674        }
4675        return false;
4676    }
4677
4678    /**
4679     * This is used to remove all style-impacting spans from text before new
4680     * extracted text is being replaced into it, so that we don't have any
4681     * lingering spans applied during the replace.
4682     */
4683    static void removeParcelableSpans(Spannable spannable, int start, int end) {
4684        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
4685        int i = spans.length;
4686        while (i > 0) {
4687            i--;
4688            spannable.removeSpan(spans[i]);
4689        }
4690    }
4691
4692    /**
4693     * Apply to this text view the given extracted text, as previously
4694     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
4695     */
4696    public void setExtractedText(ExtractedText text) {
4697        Editable content = getEditableText();
4698        if (text.text != null) {
4699            if (content == null) {
4700                setText(text.text, TextView.BufferType.EDITABLE);
4701            } else if (text.partialStartOffset < 0) {
4702                removeParcelableSpans(content, 0, content.length());
4703                content.replace(0, content.length(), text.text);
4704            } else {
4705                final int N = content.length();
4706                int start = text.partialStartOffset;
4707                if (start > N) start = N;
4708                int end = text.partialEndOffset;
4709                if (end > N) end = N;
4710                removeParcelableSpans(content, start, end);
4711                content.replace(start, end, text.text);
4712            }
4713        }
4714
4715        // Now set the selection position...  make sure it is in range, to
4716        // avoid crashes.  If this is a partial update, it is possible that
4717        // the underlying text may have changed, causing us problems here.
4718        // Also we just don't want to trust clients to do the right thing.
4719        Spannable sp = (Spannable)getText();
4720        final int N = sp.length();
4721        int start = text.selectionStart;
4722        if (start < 0) start = 0;
4723        else if (start > N) start = N;
4724        int end = text.selectionEnd;
4725        if (end < 0) end = 0;
4726        else if (end > N) end = N;
4727        Selection.setSelection(sp, start, end);
4728
4729        // Finally, update the selection mode.
4730        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
4731            MetaKeyKeyListener.startSelecting(this, sp);
4732        } else {
4733            MetaKeyKeyListener.stopSelecting(this, sp);
4734        }
4735    }
4736
4737    /**
4738     * @hide
4739     */
4740    public void setExtracting(ExtractedTextRequest req) {
4741        if (mInputMethodState != null) {
4742            mInputMethodState.mExtracting = req;
4743        }
4744    }
4745
4746    /**
4747     * Called by the framework in response to a text completion from
4748     * the current input method, provided by it calling
4749     * {@link InputConnection#commitCompletion
4750     * InputConnection.commitCompletion()}.  The default implementation does
4751     * nothing; text views that are supporting auto-completion should override
4752     * this to do their desired behavior.
4753     *
4754     * @param text The auto complete text the user has selected.
4755     */
4756    public void onCommitCompletion(CompletionInfo text) {
4757    }
4758
4759    public void beginBatchEdit() {
4760        final InputMethodState ims = mInputMethodState;
4761        if (ims != null) {
4762            int nesting = ++ims.mBatchEditNesting;
4763            if (nesting == 1) {
4764                ims.mCursorChanged = false;
4765                ims.mChangedDelta = 0;
4766                if (ims.mContentChanged) {
4767                    // We already have a pending change from somewhere else,
4768                    // so turn this into a full update.
4769                    ims.mChangedStart = 0;
4770                    ims.mChangedEnd = mText.length();
4771                } else {
4772                    ims.mChangedStart = EXTRACT_UNKNOWN;
4773                    ims.mChangedEnd = EXTRACT_UNKNOWN;
4774                    ims.mContentChanged = false;
4775                }
4776                onBeginBatchEdit();
4777            }
4778        }
4779    }
4780
4781    public void endBatchEdit() {
4782        final InputMethodState ims = mInputMethodState;
4783        if (ims != null) {
4784            int nesting = --ims.mBatchEditNesting;
4785            if (nesting == 0) {
4786                finishBatchEdit(ims);
4787            }
4788        }
4789    }
4790
4791    void ensureEndedBatchEdit() {
4792        final InputMethodState ims = mInputMethodState;
4793        if (ims != null && ims.mBatchEditNesting != 0) {
4794            ims.mBatchEditNesting = 0;
4795            finishBatchEdit(ims);
4796        }
4797    }
4798
4799    void finishBatchEdit(final InputMethodState ims) {
4800        onEndBatchEdit();
4801
4802        if (ims.mContentChanged || ims.mSelectionModeChanged) {
4803            updateAfterEdit();
4804            reportExtractedText();
4805        } else if (ims.mCursorChanged) {
4806            // Cheezy way to get us to report the current cursor location.
4807            invalidateCursor();
4808        }
4809    }
4810
4811    void updateAfterEdit() {
4812        invalidate();
4813        int curs = getSelectionStart();
4814
4815        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
4816                             Gravity.BOTTOM) {
4817            registerForPreDraw();
4818        }
4819
4820        if (curs >= 0) {
4821            mHighlightPathBogus = true;
4822
4823            if (isFocused()) {
4824                mShowCursor = SystemClock.uptimeMillis();
4825                makeBlink();
4826            }
4827        }
4828
4829        checkForResize();
4830    }
4831
4832    /**
4833     * Called by the framework in response to a request to begin a batch
4834     * of edit operations through a call to link {@link #beginBatchEdit()}.
4835     */
4836    public void onBeginBatchEdit() {
4837    }
4838
4839    /**
4840     * Called by the framework in response to a request to end a batch
4841     * of edit operations through a call to link {@link #endBatchEdit}.
4842     */
4843    public void onEndBatchEdit() {
4844    }
4845
4846    /**
4847     * Called by the framework in response to a private command from the
4848     * current method, provided by it calling
4849     * {@link InputConnection#performPrivateCommand
4850     * InputConnection.performPrivateCommand()}.
4851     *
4852     * @param action The action name of the command.
4853     * @param data Any additional data for the command.  This may be null.
4854     * @return Return true if you handled the command, else false.
4855     */
4856    public boolean onPrivateIMECommand(String action, Bundle data) {
4857        return false;
4858    }
4859
4860    private void nullLayouts() {
4861        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
4862            mSavedLayout = (BoringLayout) mLayout;
4863        }
4864        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
4865            mSavedHintLayout = (BoringLayout) mHintLayout;
4866        }
4867
4868        mLayout = mHintLayout = null;
4869    }
4870
4871    /**
4872     * Make a new Layout based on the already-measured size of the view,
4873     * on the assumption that it was measured correctly at some point.
4874     */
4875    private void assumeLayout() {
4876        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
4877
4878        if (width < 1) {
4879            width = 0;
4880        }
4881
4882        int physicalWidth = width;
4883
4884        if (mHorizontallyScrolling) {
4885            width = VERY_WIDE;
4886        }
4887
4888        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
4889                      physicalWidth, false);
4890    }
4891
4892    /**
4893     * The width passed in is now the desired layout width,
4894     * not the full view width with padding.
4895     * {@hide}
4896     */
4897    protected void makeNewLayout(int w, int hintWidth,
4898                                 BoringLayout.Metrics boring,
4899                                 BoringLayout.Metrics hintBoring,
4900                                 int ellipsisWidth, boolean bringIntoView) {
4901        stopMarquee();
4902
4903        mHighlightPathBogus = true;
4904
4905        if (w < 0) {
4906            w = 0;
4907        }
4908        if (hintWidth < 0) {
4909            hintWidth = 0;
4910        }
4911
4912        Layout.Alignment alignment;
4913        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
4914            case Gravity.CENTER_HORIZONTAL:
4915                alignment = Layout.Alignment.ALIGN_CENTER;
4916                break;
4917
4918            case Gravity.RIGHT:
4919                alignment = Layout.Alignment.ALIGN_OPPOSITE;
4920                break;
4921
4922            default:
4923                alignment = Layout.Alignment.ALIGN_NORMAL;
4924        }
4925
4926        boolean shouldEllipsize = mEllipsize != null && mInput == null;
4927
4928        if (mText instanceof Spannable) {
4929            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
4930                    alignment, mSpacingMult,
4931                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
4932                    ellipsisWidth);
4933        } else {
4934            if (boring == UNKNOWN_BORING) {
4935                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
4936                                               mBoring);
4937                if (boring != null) {
4938                    mBoring = boring;
4939                }
4940            }
4941
4942            if (boring != null) {
4943                if (boring.width <= w &&
4944                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
4945                    if (mSavedLayout != null) {
4946                        mLayout = mSavedLayout.
4947                                replaceOrMake(mTransformed, mTextPaint,
4948                                w, alignment, mSpacingMult, mSpacingAdd,
4949                                boring, mIncludePad);
4950                    } else {
4951                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4952                                w, alignment, mSpacingMult, mSpacingAdd,
4953                                boring, mIncludePad);
4954                    }
4955
4956                    mSavedLayout = (BoringLayout) mLayout;
4957                } else if (shouldEllipsize && boring.width <= w) {
4958                    if (mSavedLayout != null) {
4959                        mLayout = mSavedLayout.
4960                                replaceOrMake(mTransformed, mTextPaint,
4961                                w, alignment, mSpacingMult, mSpacingAdd,
4962                                boring, mIncludePad, mEllipsize,
4963                                ellipsisWidth);
4964                    } else {
4965                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4966                                w, alignment, mSpacingMult, mSpacingAdd,
4967                                boring, mIncludePad, mEllipsize,
4968                                ellipsisWidth);
4969                    }
4970                } else if (shouldEllipsize) {
4971                    mLayout = new StaticLayout(mTransformed,
4972                                0, mTransformed.length(),
4973                                mTextPaint, w, alignment, mSpacingMult,
4974                                mSpacingAdd, mIncludePad, mEllipsize,
4975                                ellipsisWidth);
4976                } else {
4977                    mLayout = new StaticLayout(mTransformed, mTextPaint,
4978                            w, alignment, mSpacingMult, mSpacingAdd,
4979                            mIncludePad);
4980                }
4981            } else if (shouldEllipsize) {
4982                mLayout = new StaticLayout(mTransformed,
4983                            0, mTransformed.length(),
4984                            mTextPaint, w, alignment, mSpacingMult,
4985                            mSpacingAdd, mIncludePad, mEllipsize,
4986                            ellipsisWidth);
4987            } else {
4988                mLayout = new StaticLayout(mTransformed, mTextPaint,
4989                        w, alignment, mSpacingMult, mSpacingAdd,
4990                        mIncludePad);
4991            }
4992        }
4993
4994        shouldEllipsize = mEllipsize != null;
4995        mHintLayout = null;
4996
4997        if (mHint != null) {
4998            if (shouldEllipsize) hintWidth = w;
4999
5000            if (hintBoring == UNKNOWN_BORING) {
5001                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5002                                                   mHintBoring);
5003                if (hintBoring != null) {
5004                    mHintBoring = hintBoring;
5005                }
5006            }
5007
5008            if (hintBoring != null) {
5009                if (hintBoring.width <= hintWidth &&
5010                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5011                    if (mSavedHintLayout != null) {
5012                        mHintLayout = mSavedHintLayout.
5013                                replaceOrMake(mHint, mTextPaint,
5014                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5015                                hintBoring, mIncludePad);
5016                    } else {
5017                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5018                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5019                                hintBoring, mIncludePad);
5020                    }
5021
5022                    mSavedHintLayout = (BoringLayout) mHintLayout;
5023                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5024                    if (mSavedHintLayout != null) {
5025                        mHintLayout = mSavedHintLayout.
5026                                replaceOrMake(mHint, mTextPaint,
5027                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5028                                hintBoring, mIncludePad, mEllipsize,
5029                                ellipsisWidth);
5030                    } else {
5031                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5032                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5033                                hintBoring, mIncludePad, mEllipsize,
5034                                ellipsisWidth);
5035                    }
5036                } else if (shouldEllipsize) {
5037                    mHintLayout = new StaticLayout(mHint,
5038                                0, mHint.length(),
5039                                mTextPaint, hintWidth, alignment, mSpacingMult,
5040                                mSpacingAdd, mIncludePad, mEllipsize,
5041                                ellipsisWidth);
5042                } else {
5043                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5044                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5045                            mIncludePad);
5046                }
5047            } else if (shouldEllipsize) {
5048                mHintLayout = new StaticLayout(mHint,
5049                            0, mHint.length(),
5050                            mTextPaint, hintWidth, alignment, mSpacingMult,
5051                            mSpacingAdd, mIncludePad, mEllipsize,
5052                            ellipsisWidth);
5053            } else {
5054                mHintLayout = new StaticLayout(mHint, mTextPaint,
5055                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5056                        mIncludePad);
5057            }
5058        }
5059
5060        if (bringIntoView) {
5061            registerForPreDraw();
5062        }
5063
5064        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5065            if (!compressText(ellipsisWidth)) {
5066                final int height = mLayoutParams.height;
5067                // If the size of the view does not depend on the size of the text, try to
5068                // start the marquee immediately
5069                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5070                    startMarquee();
5071                } else {
5072                    // Defer the start of the marquee until we know our width (see setFrame())
5073                    mRestartMarquee = true;
5074                }
5075            }
5076        }
5077
5078        // CursorControllers need a non-null mLayout
5079        prepareCursorControllers();
5080    }
5081
5082    private boolean compressText(float width) {
5083        // Only compress the text if it hasn't been compressed by the previous pass
5084        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5085                mTextPaint.getTextScaleX() == 1.0f) {
5086            final float textWidth = mLayout.getLineWidth(0);
5087            final float overflow = (textWidth + 1.0f - width) / width;
5088            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5089                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5090                post(new Runnable() {
5091                    public void run() {
5092                        requestLayout();
5093                    }
5094                });
5095                return true;
5096            }
5097        }
5098
5099        return false;
5100    }
5101
5102    private static int desired(Layout layout) {
5103        int n = layout.getLineCount();
5104        CharSequence text = layout.getText();
5105        float max = 0;
5106
5107        // if any line was wrapped, we can't use it.
5108        // but it's ok for the last line not to have a newline
5109
5110        for (int i = 0; i < n - 1; i++) {
5111            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5112                return -1;
5113        }
5114
5115        for (int i = 0; i < n; i++) {
5116            max = Math.max(max, layout.getLineWidth(i));
5117        }
5118
5119        return (int) FloatMath.ceil(max);
5120    }
5121
5122    /**
5123     * Set whether the TextView includes extra top and bottom padding to make
5124     * room for accents that go above the normal ascent and descent.
5125     * The default is true.
5126     *
5127     * @attr ref android.R.styleable#TextView_includeFontPadding
5128     */
5129    public void setIncludeFontPadding(boolean includepad) {
5130        mIncludePad = includepad;
5131
5132        if (mLayout != null) {
5133            nullLayouts();
5134            requestLayout();
5135            invalidate();
5136        }
5137    }
5138
5139    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5140
5141    @Override
5142    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5143        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5144        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5145        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5146        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5147
5148        int width;
5149        int height;
5150
5151        BoringLayout.Metrics boring = UNKNOWN_BORING;
5152        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5153
5154        int des = -1;
5155        boolean fromexisting = false;
5156
5157        if (widthMode == MeasureSpec.EXACTLY) {
5158            // Parent has told us how big to be. So be it.
5159            width = widthSize;
5160        } else {
5161            if (mLayout != null && mEllipsize == null) {
5162                des = desired(mLayout);
5163            }
5164
5165            if (des < 0) {
5166                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5167                if (boring != null) {
5168                    mBoring = boring;
5169                }
5170            } else {
5171                fromexisting = true;
5172            }
5173
5174            if (boring == null || boring == UNKNOWN_BORING) {
5175                if (des < 0) {
5176                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5177                }
5178
5179                width = des;
5180            } else {
5181                width = boring.width;
5182            }
5183
5184            final Drawables dr = mDrawables;
5185            if (dr != null) {
5186                width = Math.max(width, dr.mDrawableWidthTop);
5187                width = Math.max(width, dr.mDrawableWidthBottom);
5188            }
5189
5190            if (mHint != null) {
5191                int hintDes = -1;
5192                int hintWidth;
5193
5194                if (mHintLayout != null && mEllipsize == null) {
5195                    hintDes = desired(mHintLayout);
5196                }
5197
5198                if (hintDes < 0) {
5199                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5200                    if (hintBoring != null) {
5201                        mHintBoring = hintBoring;
5202                    }
5203                }
5204
5205                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5206                    if (hintDes < 0) {
5207                        hintDes = (int) FloatMath.ceil(
5208                                Layout.getDesiredWidth(mHint, mTextPaint));
5209                    }
5210
5211                    hintWidth = hintDes;
5212                } else {
5213                    hintWidth = hintBoring.width;
5214                }
5215
5216                if (hintWidth > width) {
5217                    width = hintWidth;
5218                }
5219            }
5220
5221            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5222
5223            if (mMaxWidthMode == EMS) {
5224                width = Math.min(width, mMaxWidth * getLineHeight());
5225            } else {
5226                width = Math.min(width, mMaxWidth);
5227            }
5228
5229            if (mMinWidthMode == EMS) {
5230                width = Math.max(width, mMinWidth * getLineHeight());
5231            } else {
5232                width = Math.max(width, mMinWidth);
5233            }
5234
5235            // Check against our minimum width
5236            width = Math.max(width, getSuggestedMinimumWidth());
5237
5238            if (widthMode == MeasureSpec.AT_MOST) {
5239                width = Math.min(widthSize, width);
5240            }
5241        }
5242
5243        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5244        int unpaddedWidth = want;
5245        int hintWant = want;
5246
5247        if (mHorizontallyScrolling)
5248            want = VERY_WIDE;
5249
5250        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5251
5252        if (mLayout == null) {
5253            makeNewLayout(want, hintWant, boring, hintBoring,
5254                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5255        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5256                   (mLayout.getEllipsizedWidth() !=
5257                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5258            if (mHint == null && mEllipsize == null &&
5259                    want > mLayout.getWidth() &&
5260                    (mLayout instanceof BoringLayout ||
5261                            (fromexisting && des >= 0 && des <= want))) {
5262                mLayout.increaseWidthTo(want);
5263            } else {
5264                makeNewLayout(want, hintWant, boring, hintBoring,
5265                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5266            }
5267        } else {
5268            // Width has not changed.
5269        }
5270
5271        if (heightMode == MeasureSpec.EXACTLY) {
5272            // Parent has told us how big to be. So be it.
5273            height = heightSize;
5274            mDesiredHeightAtMeasure = -1;
5275        } else {
5276            int desired = getDesiredHeight();
5277
5278            height = desired;
5279            mDesiredHeightAtMeasure = desired;
5280
5281            if (heightMode == MeasureSpec.AT_MOST) {
5282                height = Math.min(desired, heightSize);
5283            }
5284        }
5285
5286        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5287        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5288            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5289        }
5290
5291        /*
5292         * We didn't let makeNewLayout() register to bring the cursor into view,
5293         * so do it here if there is any possibility that it is needed.
5294         */
5295        if (mMovement != null ||
5296            mLayout.getWidth() > unpaddedWidth ||
5297            mLayout.getHeight() > unpaddedHeight) {
5298            registerForPreDraw();
5299        } else {
5300            scrollTo(0, 0);
5301        }
5302
5303        setMeasuredDimension(width, height);
5304    }
5305
5306    private int getDesiredHeight() {
5307        return Math.max(
5308                getDesiredHeight(mLayout, true),
5309                getDesiredHeight(mHintLayout, mEllipsize != null));
5310    }
5311
5312    private int getDesiredHeight(Layout layout, boolean cap) {
5313        if (layout == null) {
5314            return 0;
5315        }
5316
5317        int linecount = layout.getLineCount();
5318        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5319        int desired = layout.getLineTop(linecount);
5320
5321        final Drawables dr = mDrawables;
5322        if (dr != null) {
5323            desired = Math.max(desired, dr.mDrawableHeightLeft);
5324            desired = Math.max(desired, dr.mDrawableHeightRight);
5325        }
5326
5327        desired += pad;
5328
5329        if (mMaxMode == LINES) {
5330            /*
5331             * Don't cap the hint to a certain number of lines.
5332             * (Do cap it, though, if we have a maximum pixel height.)
5333             */
5334            if (cap) {
5335                if (linecount > mMaximum) {
5336                    desired = layout.getLineTop(mMaximum) +
5337                              layout.getBottomPadding();
5338
5339                    if (dr != null) {
5340                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5341                        desired = Math.max(desired, dr.mDrawableHeightRight);
5342                    }
5343
5344                    desired += pad;
5345                    linecount = mMaximum;
5346                }
5347            }
5348        } else {
5349            desired = Math.min(desired, mMaximum);
5350        }
5351
5352        if (mMinMode == LINES) {
5353            if (linecount < mMinimum) {
5354                desired += getLineHeight() * (mMinimum - linecount);
5355            }
5356        } else {
5357            desired = Math.max(desired, mMinimum);
5358        }
5359
5360        // Check against our minimum height
5361        desired = Math.max(desired, getSuggestedMinimumHeight());
5362
5363        return desired;
5364    }
5365
5366    /**
5367     * Check whether a change to the existing text layout requires a
5368     * new view layout.
5369     */
5370    private void checkForResize() {
5371        boolean sizeChanged = false;
5372
5373        if (mLayout != null) {
5374            // Check if our width changed
5375            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5376                sizeChanged = true;
5377                invalidate();
5378            }
5379
5380            // Check if our height changed
5381            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5382                int desiredHeight = getDesiredHeight();
5383
5384                if (desiredHeight != this.getHeight()) {
5385                    sizeChanged = true;
5386                }
5387            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5388                if (mDesiredHeightAtMeasure >= 0) {
5389                    int desiredHeight = getDesiredHeight();
5390
5391                    if (desiredHeight != mDesiredHeightAtMeasure) {
5392                        sizeChanged = true;
5393                    }
5394                }
5395            }
5396        }
5397
5398        if (sizeChanged) {
5399            requestLayout();
5400            // caller will have already invalidated
5401        }
5402    }
5403
5404    /**
5405     * Check whether entirely new text requires a new view layout
5406     * or merely a new text layout.
5407     */
5408    private void checkForRelayout() {
5409        // If we have a fixed width, we can just swap in a new text layout
5410        // if the text height stays the same or if the view height is fixed.
5411
5412        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5413                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5414                (mHint == null || mHintLayout != null) &&
5415                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5416            // Static width, so try making a new text layout.
5417
5418            int oldht = mLayout.getHeight();
5419            int want = mLayout.getWidth();
5420            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5421
5422            /*
5423             * No need to bring the text into view, since the size is not
5424             * changing (unless we do the requestLayout(), in which case it
5425             * will happen at measure).
5426             */
5427            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5428                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5429                          false);
5430
5431            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5432                // In a fixed-height view, so use our new text layout.
5433                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5434                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5435                    invalidate();
5436                    return;
5437                }
5438
5439                // Dynamic height, but height has stayed the same,
5440                // so use our new text layout.
5441                if (mLayout.getHeight() == oldht &&
5442                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5443                    invalidate();
5444                    return;
5445                }
5446            }
5447
5448            // We lose: the height has changed and we have a dynamic height.
5449            // Request a new view layout using our new text layout.
5450            requestLayout();
5451            invalidate();
5452        } else {
5453            // Dynamic width, so we have no choice but to request a new
5454            // view layout with a new text layout.
5455
5456            nullLayouts();
5457            requestLayout();
5458            invalidate();
5459        }
5460    }
5461
5462    /**
5463     * Returns true if anything changed.
5464     */
5465    private boolean bringTextIntoView() {
5466        int line = 0;
5467        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5468            line = mLayout.getLineCount() - 1;
5469        }
5470
5471        Layout.Alignment a = mLayout.getParagraphAlignment(line);
5472        int dir = mLayout.getParagraphDirection(line);
5473        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5474        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5475        int ht = mLayout.getHeight();
5476
5477        int scrollx, scrolly;
5478
5479        if (a == Layout.Alignment.ALIGN_CENTER) {
5480            /*
5481             * Keep centered if possible, or, if it is too wide to fit,
5482             * keep leading edge in view.
5483             */
5484
5485            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5486            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5487
5488            if (right - left < hspace) {
5489                scrollx = (right + left) / 2 - hspace / 2;
5490            } else {
5491                if (dir < 0) {
5492                    scrollx = right - hspace;
5493                } else {
5494                    scrollx = left;
5495                }
5496            }
5497        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
5498            /*
5499             * Keep leading edge in view.
5500             */
5501
5502            if (dir < 0) {
5503                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5504                scrollx = right - hspace;
5505            } else {
5506                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5507            }
5508        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
5509            /*
5510             * Keep trailing edge in view.
5511             */
5512
5513            if (dir < 0) {
5514                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5515            } else {
5516                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5517                scrollx = right - hspace;
5518            }
5519        }
5520
5521        if (ht < vspace) {
5522            scrolly = 0;
5523        } else {
5524            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5525                scrolly = ht - vspace;
5526            } else {
5527                scrolly = 0;
5528            }
5529        }
5530
5531        if (scrollx != mScrollX || scrolly != mScrollY) {
5532            scrollTo(scrollx, scrolly);
5533            return true;
5534        } else {
5535            return false;
5536        }
5537    }
5538
5539    /**
5540     * Move the point, specified by the offset, into the view if it is needed.
5541     * This has to be called after layout. Returns true if anything changed.
5542     */
5543    public boolean bringPointIntoView(int offset) {
5544        boolean changed = false;
5545
5546        int line = mLayout.getLineForOffset(offset);
5547
5548        // FIXME: Is it okay to truncate this, or should we round?
5549        final int x = (int)mLayout.getPrimaryHorizontal(offset);
5550        final int top = mLayout.getLineTop(line);
5551        final int bottom = mLayout.getLineTop(line + 1);
5552
5553        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5554        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5555        int ht = mLayout.getHeight();
5556
5557        int grav;
5558
5559        switch (mLayout.getParagraphAlignment(line)) {
5560            case ALIGN_NORMAL:
5561                grav = 1;
5562                break;
5563
5564            case ALIGN_OPPOSITE:
5565                grav = -1;
5566                break;
5567
5568            default:
5569                grav = 0;
5570        }
5571
5572        grav *= mLayout.getParagraphDirection(line);
5573
5574        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5575        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5576
5577        int hslack = (bottom - top) / 2;
5578        int vslack = hslack;
5579
5580        if (vslack > vspace / 4)
5581            vslack = vspace / 4;
5582        if (hslack > hspace / 4)
5583            hslack = hspace / 4;
5584
5585        int hs = mScrollX;
5586        int vs = mScrollY;
5587
5588        if (top - vs < vslack)
5589            vs = top - vslack;
5590        if (bottom - vs > vspace - vslack)
5591            vs = bottom - (vspace - vslack);
5592        if (ht - vs < vspace)
5593            vs = ht - vspace;
5594        if (0 - vs > 0)
5595            vs = 0;
5596
5597        if (grav != 0) {
5598            if (x - hs < hslack) {
5599                hs = x - hslack;
5600            }
5601            if (x - hs > hspace - hslack) {
5602                hs = x - (hspace - hslack);
5603            }
5604        }
5605
5606        if (grav < 0) {
5607            if (left - hs > 0)
5608                hs = left;
5609            if (right - hs < hspace)
5610                hs = right - hspace;
5611        } else if (grav > 0) {
5612            if (right - hs < hspace)
5613                hs = right - hspace;
5614            if (left - hs > 0)
5615                hs = left;
5616        } else /* grav == 0 */ {
5617            if (right - left <= hspace) {
5618                /*
5619                 * If the entire text fits, center it exactly.
5620                 */
5621                hs = left - (hspace - (right - left)) / 2;
5622            } else if (x > right - hslack) {
5623                /*
5624                 * If we are near the right edge, keep the right edge
5625                 * at the edge of the view.
5626                 */
5627                hs = right - hspace;
5628            } else if (x < left + hslack) {
5629                /*
5630                 * If we are near the left edge, keep the left edge
5631                 * at the edge of the view.
5632                 */
5633                hs = left;
5634            } else if (left > hs) {
5635                /*
5636                 * Is there whitespace visible at the left?  Fix it if so.
5637                 */
5638                hs = left;
5639            } else if (right < hs + hspace) {
5640                /*
5641                 * Is there whitespace visible at the right?  Fix it if so.
5642                 */
5643                hs = right - hspace;
5644            } else {
5645                /*
5646                 * Otherwise, float as needed.
5647                 */
5648                if (x - hs < hslack) {
5649                    hs = x - hslack;
5650                }
5651                if (x - hs > hspace - hslack) {
5652                    hs = x - (hspace - hslack);
5653                }
5654            }
5655        }
5656
5657        if (hs != mScrollX || vs != mScrollY) {
5658            if (mScroller == null) {
5659                scrollTo(hs, vs);
5660            } else {
5661                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
5662                int dx = hs - mScrollX;
5663                int dy = vs - mScrollY;
5664
5665                if (duration > ANIMATED_SCROLL_GAP) {
5666                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
5667                    awakenScrollBars(mScroller.getDuration());
5668                    invalidate();
5669                } else {
5670                    if (!mScroller.isFinished()) {
5671                        mScroller.abortAnimation();
5672                    }
5673
5674                    scrollBy(dx, dy);
5675                }
5676
5677                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
5678            }
5679
5680            changed = true;
5681        }
5682
5683        if (isFocused()) {
5684            // This offsets because getInterestingRect() is in terms of
5685            // viewport coordinates, but requestRectangleOnScreen()
5686            // is in terms of content coordinates.
5687
5688            Rect r = new Rect(x, top, x + 1, bottom);
5689            getInterestingRect(r, line);
5690            r.offset(mScrollX, mScrollY);
5691
5692            if (requestRectangleOnScreen(r)) {
5693                changed = true;
5694            }
5695        }
5696
5697        return changed;
5698    }
5699
5700    /**
5701     * Move the cursor, if needed, so that it is at an offset that is visible
5702     * to the user.  This will not move the cursor if it represents more than
5703     * one character (a selection range).  This will only work if the
5704     * TextView contains spannable text; otherwise it will do nothing.
5705     *
5706     * @return True if the cursor was actually moved, false otherwise.
5707     */
5708    public boolean moveCursorToVisibleOffset() {
5709        if (!(mText instanceof Spannable)) {
5710            return false;
5711        }
5712        int start = getSelectionStart();
5713        int end = getSelectionEnd();
5714        if (start != end) {
5715            return false;
5716        }
5717
5718        // First: make sure the line is visible on screen:
5719
5720        int line = mLayout.getLineForOffset(start);
5721
5722        final int top = mLayout.getLineTop(line);
5723        final int bottom = mLayout.getLineTop(line + 1);
5724        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5725        int vslack = (bottom - top) / 2;
5726        if (vslack > vspace / 4)
5727            vslack = vspace / 4;
5728        final int vs = mScrollY;
5729
5730        if (top < (vs+vslack)) {
5731            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
5732        } else if (bottom > (vspace+vs-vslack)) {
5733            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
5734        }
5735
5736        // Next: make sure the character is visible on screen:
5737
5738        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5739        final int hs = mScrollX;
5740        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
5741        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
5742
5743        int newStart = start;
5744        if (newStart < leftChar) {
5745            newStart = leftChar;
5746        } else if (newStart > rightChar) {
5747            newStart = rightChar;
5748        }
5749
5750        if (newStart != start) {
5751            Selection.setSelection((Spannable)mText, newStart);
5752            return true;
5753        }
5754
5755        return false;
5756    }
5757
5758    @Override
5759    public void computeScroll() {
5760        if (mScroller != null) {
5761            if (mScroller.computeScrollOffset()) {
5762                mScrollX = mScroller.getCurrX();
5763                mScrollY = mScroller.getCurrY();
5764                postInvalidate();  // So we draw again
5765            }
5766        }
5767    }
5768
5769    private void getInterestingRect(Rect r, int line) {
5770        convertFromViewportToContentCoordinates(r);
5771
5772        // Rectangle can can be expanded on first and last line to take
5773        // padding into account.
5774        // TODO Take left/right padding into account too?
5775        if (line == 0) r.top -= getExtendedPaddingTop();
5776        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
5777    }
5778
5779    private void convertFromViewportToContentCoordinates(Rect r) {
5780        final int horizontalOffset = viewportToContentHorizontalOffset();
5781        r.left += horizontalOffset;
5782        r.right += horizontalOffset;
5783
5784        final int verticalOffset = viewportToContentVerticalOffset();
5785        r.top += verticalOffset;
5786        r.bottom += verticalOffset;
5787    }
5788
5789    private int viewportToContentHorizontalOffset() {
5790        return getCompoundPaddingLeft() - mScrollX;
5791    }
5792
5793    private int viewportToContentVerticalOffset() {
5794        int offset = getExtendedPaddingTop() - mScrollY;
5795        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5796            offset += getVerticalOffset(false);
5797        }
5798        return offset;
5799    }
5800
5801    @Override
5802    public void debug(int depth) {
5803        super.debug(depth);
5804
5805        String output = debugIndent(depth);
5806        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
5807                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
5808                + "} ";
5809
5810        if (mText != null) {
5811
5812            output += "mText=\"" + mText + "\" ";
5813            if (mLayout != null) {
5814                output += "mLayout width=" + mLayout.getWidth()
5815                        + " height=" + mLayout.getHeight();
5816            }
5817        } else {
5818            output += "mText=NULL";
5819        }
5820        Log.d(VIEW_LOG_TAG, output);
5821    }
5822
5823    /**
5824     * Convenience for {@link Selection#getSelectionStart}.
5825     */
5826    @ViewDebug.ExportedProperty(category = "text")
5827    public int getSelectionStart() {
5828        return Selection.getSelectionStart(getText());
5829    }
5830
5831    /**
5832     * Convenience for {@link Selection#getSelectionEnd}.
5833     */
5834    @ViewDebug.ExportedProperty(category = "text")
5835    public int getSelectionEnd() {
5836        return Selection.getSelectionEnd(getText());
5837    }
5838
5839    /**
5840     * Return true iff there is a selection inside this text view.
5841     */
5842    public boolean hasSelection() {
5843        final int selectionStart = getSelectionStart();
5844        final int selectionEnd = getSelectionEnd();
5845
5846        return selectionStart >= 0 && selectionStart != selectionEnd;
5847    }
5848
5849    /**
5850     * Sets the properties of this field (lines, horizontally scrolling,
5851     * transformation method) to be for a single-line input.
5852     *
5853     * @attr ref android.R.styleable#TextView_singleLine
5854     */
5855    public void setSingleLine() {
5856        setSingleLine(true);
5857    }
5858
5859    /**
5860     * If true, sets the properties of this field (lines, horizontally
5861     * scrolling, transformation method) to be for a single-line input;
5862     * if false, restores these to the default conditions.
5863     * Note that calling this with false restores default conditions,
5864     * not necessarily those that were in effect prior to calling
5865     * it with true.
5866     *
5867     * @attr ref android.R.styleable#TextView_singleLine
5868     */
5869    @android.view.RemotableViewMethod
5870    public void setSingleLine(boolean singleLine) {
5871        if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
5872                == EditorInfo.TYPE_CLASS_TEXT) {
5873            if (singleLine) {
5874                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5875            } else {
5876                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5877            }
5878        }
5879        applySingleLine(singleLine, true);
5880    }
5881
5882    private void applySingleLine(boolean singleLine, boolean applyTransformation) {
5883        mSingleLine = singleLine;
5884        if (singleLine) {
5885            setLines(1);
5886            setHorizontallyScrolling(true);
5887            if (applyTransformation) {
5888                setTransformationMethod(SingleLineTransformationMethod.
5889                                        getInstance());
5890            }
5891        } else {
5892            setMaxLines(Integer.MAX_VALUE);
5893            setHorizontallyScrolling(false);
5894            if (applyTransformation) {
5895                setTransformationMethod(null);
5896            }
5897        }
5898    }
5899
5900    /**
5901     * Causes words in the text that are longer than the view is wide
5902     * to be ellipsized instead of broken in the middle.  You may also
5903     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
5904     * to constrain the text to a single line.  Use <code>null</code>
5905     * to turn off ellipsizing.
5906     *
5907     * @attr ref android.R.styleable#TextView_ellipsize
5908     */
5909    public void setEllipsize(TextUtils.TruncateAt where) {
5910        mEllipsize = where;
5911
5912        if (mLayout != null) {
5913            nullLayouts();
5914            requestLayout();
5915            invalidate();
5916        }
5917    }
5918
5919    /**
5920     * Sets how many times to repeat the marquee animation. Only applied if the
5921     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
5922     *
5923     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
5924     */
5925    public void setMarqueeRepeatLimit(int marqueeLimit) {
5926        mMarqueeRepeatLimit = marqueeLimit;
5927    }
5928
5929    /**
5930     * Returns where, if anywhere, words that are longer than the view
5931     * is wide should be ellipsized.
5932     */
5933    @ViewDebug.ExportedProperty
5934    public TextUtils.TruncateAt getEllipsize() {
5935        return mEllipsize;
5936    }
5937
5938    /**
5939     * Set the TextView so that when it takes focus, all the text is
5940     * selected.
5941     *
5942     * @attr ref android.R.styleable#TextView_selectAllOnFocus
5943     */
5944    @android.view.RemotableViewMethod
5945    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
5946        mSelectAllOnFocus = selectAllOnFocus;
5947
5948        if (selectAllOnFocus && !(mText instanceof Spannable)) {
5949            setText(mText, BufferType.SPANNABLE);
5950        }
5951    }
5952
5953    /**
5954     * Set whether the cursor is visible.  The default is true.
5955     *
5956     * @attr ref android.R.styleable#TextView_cursorVisible
5957     */
5958    @android.view.RemotableViewMethod
5959    public void setCursorVisible(boolean visible) {
5960        mCursorVisible = visible;
5961        invalidate();
5962
5963        if (visible) {
5964            makeBlink();
5965        } else if (mBlink != null) {
5966            mBlink.removeCallbacks(mBlink);
5967        }
5968
5969        // InsertionPointCursorController depends on mCursorVisible
5970        prepareCursorControllers();
5971    }
5972
5973    private boolean canMarquee() {
5974        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
5975        return width > 0 && mLayout.getLineWidth(0) > width;
5976    }
5977
5978    private void startMarquee() {
5979        // Do not ellipsize EditText
5980        if (mInput != null) return;
5981
5982        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5983            return;
5984        }
5985
5986        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
5987                getLineCount() == 1 && canMarquee()) {
5988
5989            if (mMarquee == null) mMarquee = new Marquee(this);
5990            mMarquee.start(mMarqueeRepeatLimit);
5991        }
5992    }
5993
5994    private void stopMarquee() {
5995        if (mMarquee != null && !mMarquee.isStopped()) {
5996            mMarquee.stop();
5997        }
5998    }
5999
6000    private void startStopMarquee(boolean start) {
6001        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6002            if (start) {
6003                startMarquee();
6004            } else {
6005                stopMarquee();
6006            }
6007        }
6008    }
6009
6010    private static final class Marquee extends Handler {
6011        // TODO: Add an option to configure this
6012        private static final float MARQUEE_DELTA_MAX = 0.07f;
6013        private static final int MARQUEE_DELAY = 1200;
6014        private static final int MARQUEE_RESTART_DELAY = 1200;
6015        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6016        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6017
6018        private static final byte MARQUEE_STOPPED = 0x0;
6019        private static final byte MARQUEE_STARTING = 0x1;
6020        private static final byte MARQUEE_RUNNING = 0x2;
6021
6022        private static final int MESSAGE_START = 0x1;
6023        private static final int MESSAGE_TICK = 0x2;
6024        private static final int MESSAGE_RESTART = 0x3;
6025
6026        private final WeakReference<TextView> mView;
6027
6028        private byte mStatus = MARQUEE_STOPPED;
6029        private final float mScrollUnit;
6030        private float mMaxScroll;
6031        float mMaxFadeScroll;
6032        private float mGhostStart;
6033        private float mGhostOffset;
6034        private float mFadeStop;
6035        private int mRepeatLimit;
6036
6037        float mScroll;
6038
6039        Marquee(TextView v) {
6040            final float density = v.getContext().getResources().getDisplayMetrics().density;
6041            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6042            mView = new WeakReference<TextView>(v);
6043        }
6044
6045        @Override
6046        public void handleMessage(Message msg) {
6047            switch (msg.what) {
6048                case MESSAGE_START:
6049                    mStatus = MARQUEE_RUNNING;
6050                    tick();
6051                    break;
6052                case MESSAGE_TICK:
6053                    tick();
6054                    break;
6055                case MESSAGE_RESTART:
6056                    if (mStatus == MARQUEE_RUNNING) {
6057                        if (mRepeatLimit >= 0) {
6058                            mRepeatLimit--;
6059                        }
6060                        start(mRepeatLimit);
6061                    }
6062                    break;
6063            }
6064        }
6065
6066        void tick() {
6067            if (mStatus != MARQUEE_RUNNING) {
6068                return;
6069            }
6070
6071            removeMessages(MESSAGE_TICK);
6072
6073            final TextView textView = mView.get();
6074            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6075                mScroll += mScrollUnit;
6076                if (mScroll > mMaxScroll) {
6077                    mScroll = mMaxScroll;
6078                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6079                } else {
6080                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6081                }
6082                textView.invalidate();
6083            }
6084        }
6085
6086        void stop() {
6087            mStatus = MARQUEE_STOPPED;
6088            removeMessages(MESSAGE_START);
6089            removeMessages(MESSAGE_RESTART);
6090            removeMessages(MESSAGE_TICK);
6091            resetScroll();
6092        }
6093
6094        private void resetScroll() {
6095            mScroll = 0.0f;
6096            final TextView textView = mView.get();
6097            if (textView != null) textView.invalidate();
6098        }
6099
6100        void start(int repeatLimit) {
6101            if (repeatLimit == 0) {
6102                stop();
6103                return;
6104            }
6105            mRepeatLimit = repeatLimit;
6106            final TextView textView = mView.get();
6107            if (textView != null && textView.mLayout != null) {
6108                mStatus = MARQUEE_STARTING;
6109                mScroll = 0.0f;
6110                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6111                        textView.getCompoundPaddingRight();
6112                final float lineWidth = textView.mLayout.getLineWidth(0);
6113                final float gap = textWidth / 3.0f;
6114                mGhostStart = lineWidth - textWidth + gap;
6115                mMaxScroll = mGhostStart + textWidth;
6116                mGhostOffset = lineWidth + gap;
6117                mFadeStop = lineWidth + textWidth / 6.0f;
6118                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6119
6120                textView.invalidate();
6121                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6122            }
6123        }
6124
6125        float getGhostOffset() {
6126            return mGhostOffset;
6127        }
6128
6129        boolean shouldDrawLeftFade() {
6130            return mScroll <= mFadeStop;
6131        }
6132
6133        boolean shouldDrawGhost() {
6134            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6135        }
6136
6137        boolean isRunning() {
6138            return mStatus == MARQUEE_RUNNING;
6139        }
6140
6141        boolean isStopped() {
6142            return mStatus == MARQUEE_STOPPED;
6143        }
6144    }
6145
6146    /**
6147     * This method is called when the text is changed, in case any
6148     * subclasses would like to know.
6149     *
6150     * @param text The text the TextView is displaying.
6151     * @param start The offset of the start of the range of the text
6152     *              that was modified.
6153     * @param before The offset of the former end of the range of the
6154     *               text that was modified.  If text was simply inserted,
6155     *               this will be the same as <code>start</code>.
6156     *               If text was replaced with new text or deleted, the
6157     *               length of the old text was <code>before-start</code>.
6158     * @param after The offset of the end of the range of the text
6159     *              that was modified.  If text was simply deleted,
6160     *              this will be the same as <code>start</code>.
6161     *              If text was replaced with new text or inserted,
6162     *              the length of the new text is <code>after-start</code>.
6163     */
6164    protected void onTextChanged(CharSequence text,
6165                                 int start, int before, int after) {
6166    }
6167
6168    /**
6169     * This method is called when the selection has changed, in case any
6170     * subclasses would like to know.
6171     *
6172     * @param selStart The new selection start location.
6173     * @param selEnd The new selection end location.
6174     */
6175    protected void onSelectionChanged(int selStart, int selEnd) {
6176    }
6177
6178    /**
6179     * Adds a TextWatcher to the list of those whose methods are called
6180     * whenever this TextView's text changes.
6181     * <p>
6182     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6183     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6184     * if there are any text changed listeners forces the buffer type to
6185     * Editable if it would not otherwise be and does call this method.
6186     */
6187    public void addTextChangedListener(TextWatcher watcher) {
6188        if (mListeners == null) {
6189            mListeners = new ArrayList<TextWatcher>();
6190        }
6191
6192        mListeners.add(watcher);
6193    }
6194
6195    /**
6196     * Removes the specified TextWatcher from the list of those whose
6197     * methods are called
6198     * whenever this TextView's text changes.
6199     */
6200    public void removeTextChangedListener(TextWatcher watcher) {
6201        if (mListeners != null) {
6202            int i = mListeners.indexOf(watcher);
6203
6204            if (i >= 0) {
6205                mListeners.remove(i);
6206            }
6207        }
6208    }
6209
6210    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6211                                   int after) {
6212        if (mListeners != null) {
6213            final ArrayList<TextWatcher> list = mListeners;
6214            final int count = list.size();
6215            for (int i = 0; i < count; i++) {
6216                list.get(i).beforeTextChanged(text, start, before, after);
6217            }
6218        }
6219    }
6220
6221    /**
6222     * Not private so it can be called from an inner class without going
6223     * through a thunk.
6224     */
6225    void sendOnTextChanged(CharSequence text, int start, int before,
6226                                   int after) {
6227        if (mListeners != null) {
6228            final ArrayList<TextWatcher> list = mListeners;
6229            final int count = list.size();
6230            for (int i = 0; i < count; i++) {
6231                list.get(i).onTextChanged(text, start, before, after);
6232            }
6233        }
6234    }
6235
6236    /**
6237     * Not private so it can be called from an inner class without going
6238     * through a thunk.
6239     */
6240    void sendAfterTextChanged(Editable text) {
6241        if (mListeners != null) {
6242            final ArrayList<TextWatcher> list = mListeners;
6243            final int count = list.size();
6244            for (int i = 0; i < count; i++) {
6245                list.get(i).afterTextChanged(text);
6246            }
6247        }
6248    }
6249
6250    /**
6251     * Not private so it can be called from an inner class without going
6252     * through a thunk.
6253     */
6254    void handleTextChanged(CharSequence buffer, int start,
6255            int before, int after) {
6256        final InputMethodState ims = mInputMethodState;
6257        if (ims == null || ims.mBatchEditNesting == 0) {
6258            updateAfterEdit();
6259        }
6260        if (ims != null) {
6261            ims.mContentChanged = true;
6262            if (ims.mChangedStart < 0) {
6263                ims.mChangedStart = start;
6264                ims.mChangedEnd = start+before;
6265            } else {
6266                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6267                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6268            }
6269            ims.mChangedDelta += after-before;
6270        }
6271
6272        sendOnTextChanged(buffer, start, before, after);
6273        onTextChanged(buffer, start, before, after);
6274        hideControllers();
6275    }
6276
6277    /**
6278     * Not private so it can be called from an inner class without going
6279     * through a thunk.
6280     */
6281    void spanChange(Spanned buf, Object what, int oldStart, int newStart,
6282            int oldEnd, int newEnd) {
6283        // XXX Make the start and end move together if this ends up
6284        // spending too much time invalidating.
6285
6286        boolean selChanged = false;
6287        int newSelStart=-1, newSelEnd=-1;
6288
6289        final InputMethodState ims = mInputMethodState;
6290
6291        if (what == Selection.SELECTION_END) {
6292            mHighlightPathBogus = true;
6293            selChanged = true;
6294            newSelEnd = newStart;
6295
6296            if (!isFocused()) {
6297                mSelectionMoved = true;
6298            }
6299
6300            if (oldStart >= 0 || newStart >= 0) {
6301                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6302                registerForPreDraw();
6303
6304                if (isFocused()) {
6305                    mShowCursor = SystemClock.uptimeMillis();
6306                    makeBlink();
6307                }
6308            }
6309        }
6310
6311        if (what == Selection.SELECTION_START) {
6312            mHighlightPathBogus = true;
6313            selChanged = true;
6314            newSelStart = newStart;
6315
6316            if (!isFocused()) {
6317                mSelectionMoved = true;
6318            }
6319
6320            if (oldStart >= 0 || newStart >= 0) {
6321                int end = Selection.getSelectionEnd(buf);
6322                invalidateCursor(end, oldStart, newStart);
6323            }
6324        }
6325
6326        if (selChanged) {
6327            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6328                if (newSelStart < 0) {
6329                    newSelStart = Selection.getSelectionStart(buf);
6330                }
6331                if (newSelEnd < 0) {
6332                    newSelEnd = Selection.getSelectionEnd(buf);
6333                }
6334                onSelectionChanged(newSelStart, newSelEnd);
6335            }
6336        }
6337
6338        if (what instanceof UpdateAppearance ||
6339            what instanceof ParagraphStyle) {
6340            if (ims == null || ims.mBatchEditNesting == 0) {
6341                invalidate();
6342                mHighlightPathBogus = true;
6343                checkForResize();
6344            } else {
6345                ims.mContentChanged = true;
6346            }
6347        }
6348
6349        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6350            mHighlightPathBogus = true;
6351            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6352                ims.mSelectionModeChanged = true;
6353            }
6354
6355            if (Selection.getSelectionStart(buf) >= 0) {
6356                if (ims == null || ims.mBatchEditNesting == 0) {
6357                    invalidateCursor();
6358                } else {
6359                    ims.mCursorChanged = true;
6360                }
6361            }
6362        }
6363
6364        if (what instanceof ParcelableSpan) {
6365            // If this is a span that can be sent to a remote process,
6366            // the current extract editor would be interested in it.
6367            if (ims != null && ims.mExtracting != null) {
6368                if (ims.mBatchEditNesting != 0) {
6369                    if (oldStart >= 0) {
6370                        if (ims.mChangedStart > oldStart) {
6371                            ims.mChangedStart = oldStart;
6372                        }
6373                        if (ims.mChangedStart > oldEnd) {
6374                            ims.mChangedStart = oldEnd;
6375                        }
6376                    }
6377                    if (newStart >= 0) {
6378                        if (ims.mChangedStart > newStart) {
6379                            ims.mChangedStart = newStart;
6380                        }
6381                        if (ims.mChangedStart > newEnd) {
6382                            ims.mChangedStart = newEnd;
6383                        }
6384                    }
6385                } else {
6386                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6387                            + oldStart + "-" + oldEnd + ","
6388                            + newStart + "-" + newEnd + what);
6389                    ims.mContentChanged = true;
6390                }
6391            }
6392        }
6393    }
6394
6395    private class ChangeWatcher
6396    implements TextWatcher, SpanWatcher {
6397
6398        private CharSequence mBeforeText;
6399
6400        public void beforeTextChanged(CharSequence buffer, int start,
6401                                      int before, int after) {
6402            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6403                    + " before=" + before + " after=" + after + ": " + buffer);
6404
6405            if (AccessibilityManager.getInstance(mContext).isEnabled()
6406                    && !isPasswordInputType(mInputType)) {
6407                mBeforeText = buffer.toString();
6408            }
6409
6410            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6411        }
6412
6413        public void onTextChanged(CharSequence buffer, int start,
6414                                  int before, int after) {
6415            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6416                    + " before=" + before + " after=" + after + ": " + buffer);
6417            TextView.this.handleTextChanged(buffer, start, before, after);
6418
6419            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6420                    (isFocused() || isSelected() &&
6421                    isShown())) {
6422                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6423                mBeforeText = null;
6424            }
6425        }
6426
6427        public void afterTextChanged(Editable buffer) {
6428            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6429            TextView.this.sendAfterTextChanged(buffer);
6430
6431            if (MetaKeyKeyListener.getMetaState(buffer,
6432                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6433                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6434            }
6435        }
6436
6437        public void onSpanChanged(Spannable buf,
6438                                  Object what, int s, int e, int st, int en) {
6439            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6440                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6441            TextView.this.spanChange(buf, what, s, st, e, en);
6442        }
6443
6444        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6445            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6446                    + " what=" + what + ": " + buf);
6447            TextView.this.spanChange(buf, what, -1, s, -1, e);
6448        }
6449
6450        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
6451            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
6452                    + " what=" + what + ": " + buf);
6453            TextView.this.spanChange(buf, what, s, -1, e, -1);
6454        }
6455    }
6456
6457    private void makeBlink() {
6458        if (!mCursorVisible) {
6459            if (mBlink != null) {
6460                mBlink.removeCallbacks(mBlink);
6461            }
6462
6463            return;
6464        }
6465
6466        if (mBlink == null)
6467            mBlink = new Blink(this);
6468
6469        mBlink.removeCallbacks(mBlink);
6470        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
6471    }
6472
6473    /**
6474     * @hide
6475     */
6476    @Override
6477    public void dispatchFinishTemporaryDetach() {
6478        mDispatchTemporaryDetach = true;
6479        super.dispatchFinishTemporaryDetach();
6480        mDispatchTemporaryDetach = false;
6481    }
6482
6483    @Override
6484    public void onStartTemporaryDetach() {
6485        super.onStartTemporaryDetach();
6486        // Only track when onStartTemporaryDetach() is called directly,
6487        // usually because this instance is an editable field in a list
6488        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
6489    }
6490
6491    @Override
6492    public void onFinishTemporaryDetach() {
6493        super.onFinishTemporaryDetach();
6494        // Only track when onStartTemporaryDetach() is called directly,
6495        // usually because this instance is an editable field in a list
6496        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
6497    }
6498
6499    @Override
6500    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
6501        if (mTemporaryDetach) {
6502            // If we are temporarily in the detach state, then do nothing.
6503            super.onFocusChanged(focused, direction, previouslyFocusedRect);
6504            return;
6505        }
6506
6507        mShowCursor = SystemClock.uptimeMillis();
6508
6509        ensureEndedBatchEdit();
6510
6511        if (focused) {
6512            int selStart = getSelectionStart();
6513            int selEnd = getSelectionEnd();
6514
6515            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
6516                // Has to be done before onTakeFocus, which can be overloaded.
6517                if (mLastTouchOffset >= 0) {
6518                    // Can happen when a TextView is displayed after its content has been deleted.
6519                    mLastTouchOffset = Math.min(mLastTouchOffset, mText.length());
6520                    Selection.setSelection((Spannable) mText, mLastTouchOffset);
6521                }
6522
6523                if (mMovement != null) {
6524                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
6525                }
6526
6527                if (mSelectAllOnFocus) {
6528                    Selection.setSelection((Spannable) mText, 0, mText.length());
6529                }
6530
6531                // The DecorView does not have focus when the 'Done' ExtractEditText button is
6532                // pressed. Since it is the ViewRoot's mView, it requests focus before
6533                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
6534                // This special case ensure that we keep current selection in that case.
6535                // It would be better to know why the DecorView does not have focus at that time.
6536                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
6537                        selStart >= 0 && selEnd >= 0) {
6538                    /*
6539                     * Someone intentionally set the selection, so let them
6540                     * do whatever it is that they wanted to do instead of
6541                     * the default on-focus behavior.  We reset the selection
6542                     * here instead of just skipping the onTakeFocus() call
6543                     * because some movement methods do something other than
6544                     * just setting the selection in theirs and we still
6545                     * need to go through that path.
6546                     */
6547                    Selection.setSelection((Spannable) mText, selStart, selEnd);
6548                }
6549                mTouchFocusSelected = true;
6550            }
6551
6552            mFrozenWithFocus = false;
6553            mSelectionMoved = false;
6554
6555            if (mText instanceof Spannable) {
6556                Spannable sp = (Spannable) mText;
6557                MetaKeyKeyListener.resetMetaState(sp);
6558            }
6559
6560            makeBlink();
6561
6562            if (mError != null) {
6563                showError();
6564            }
6565        } else {
6566            if (mError != null) {
6567                hideError();
6568            }
6569            // Don't leave us in the middle of a batch edit.
6570            onEndBatchEdit();
6571
6572            hideInsertionPointCursorController();
6573            if (this instanceof ExtractEditText) {
6574                // terminateTextSelectionMode would remove selection, which we want to keep when
6575                // ExtractEditText goes out of focus.
6576                mIsInTextSelectionMode = false;
6577            } else {
6578                terminateTextSelectionMode();
6579            }
6580        }
6581
6582        startStopMarquee(focused);
6583
6584        if (mTransformation != null) {
6585            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
6586        }
6587
6588        super.onFocusChanged(focused, direction, previouslyFocusedRect);
6589    }
6590
6591    @Override
6592    public void onWindowFocusChanged(boolean hasWindowFocus) {
6593        super.onWindowFocusChanged(hasWindowFocus);
6594
6595        if (hasWindowFocus) {
6596            if (mBlink != null) {
6597                mBlink.uncancel();
6598
6599                if (isFocused()) {
6600                    mShowCursor = SystemClock.uptimeMillis();
6601                    makeBlink();
6602                }
6603            }
6604        } else {
6605            if (mBlink != null) {
6606                mBlink.cancel();
6607            }
6608            // Don't leave us in the middle of a batch edit.
6609            onEndBatchEdit();
6610            if (mInputContentType != null) {
6611                mInputContentType.enterDown = false;
6612            }
6613        }
6614
6615        startStopMarquee(hasWindowFocus);
6616    }
6617
6618    /**
6619     * Use {@link BaseInputConnection#removeComposingSpans
6620     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
6621     * state from this text view.
6622     */
6623    public void clearComposingText() {
6624        if (mText instanceof Spannable) {
6625            BaseInputConnection.removeComposingSpans((Spannable)mText);
6626        }
6627    }
6628
6629    @Override
6630    public void setSelected(boolean selected) {
6631        boolean wasSelected = isSelected();
6632
6633        super.setSelected(selected);
6634
6635        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6636            if (selected) {
6637                startMarquee();
6638            } else {
6639                stopMarquee();
6640            }
6641        }
6642    }
6643
6644    private void onTapUpEvent(int prevStart, int prevEnd) {
6645        final int start = getSelectionStart();
6646        final int end = getSelectionEnd();
6647
6648        if (start == end) {
6649            if (start >= prevStart && start < prevEnd) {
6650                // Restore previous selection
6651                Selection.setSelection((Spannable)mText, prevStart, prevEnd);
6652                // Tapping inside the selection displays the cut/copy/paste context menu.
6653                showContextMenu();
6654                return;
6655            } else {
6656                // Tapping outside stops selection mode, if any
6657                stopTextSelectionMode();
6658
6659                if (mInsertionPointCursorController != null) {
6660                    mInsertionPointCursorController.show();
6661                }
6662            }
6663        }
6664    }
6665
6666    class CommitSelectionReceiver extends ResultReceiver {
6667        private final int mPrevStart, mPrevEnd;
6668
6669        public CommitSelectionReceiver(int prevStart, int prevEnd) {
6670            super(getHandler());
6671            mPrevStart = prevStart;
6672            mPrevEnd = prevEnd;
6673        }
6674
6675        @Override
6676        protected void onReceiveResult(int resultCode, Bundle resultData) {
6677            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
6678            // by restoring its previous position.
6679            if (resultCode == InputMethodManager.RESULT_SHOWN) {
6680                final int len = mText.length();
6681                int start = Math.min(len, mPrevStart);
6682                int end = Math.min(len, mPrevEnd);
6683                Selection.setSelection((Spannable)mText, start, end);
6684
6685                if (hasSelection()) {
6686                    startTextSelectionMode();
6687                } else if (mInsertionPointCursorController != null) {
6688                    mInsertionPointCursorController.show();
6689                }
6690            }
6691        }
6692    }
6693
6694    @Override
6695    public boolean onTouchEvent(MotionEvent event) {
6696        final int action = event.getActionMasked();
6697        if (action == MotionEvent.ACTION_DOWN) {
6698            if (mInsertionPointCursorController != null) {
6699                mInsertionPointCursorController.onTouchEvent(event);
6700            }
6701            if (mSelectionModifierCursorController != null) {
6702                mSelectionModifierCursorController.onTouchEvent(event);
6703            }
6704
6705            // Reset this state; it will be re-set if super.onTouchEvent
6706            // causes focus to move to the view.
6707            mTouchFocusSelected = false;
6708            mScrolled = false;
6709        }
6710
6711        final boolean superResult = super.onTouchEvent(event);
6712
6713        /*
6714         * Don't handle the release after a long press, because it will
6715         * move the selection away from whatever the menu action was
6716         * trying to affect.
6717         */
6718        if (mEatTouchRelease && action == MotionEvent.ACTION_UP) {
6719            mEatTouchRelease = false;
6720            return superResult;
6721        }
6722
6723        if ((mMovement != null || onCheckIsTextEditor()) && mText instanceof Spannable && mLayout != null) {
6724            if (mInsertionPointCursorController != null) {
6725                mInsertionPointCursorController.onTouchEvent(event);
6726            }
6727            if (mSelectionModifierCursorController != null) {
6728                mSelectionModifierCursorController.onTouchEvent(event);
6729            }
6730
6731            boolean handled = false;
6732
6733            // Save previous selection, in case this event is used to show the IME.
6734            int oldSelStart = getSelectionStart();
6735            int oldSelEnd = getSelectionEnd();
6736
6737            final int oldScrollX = mScrollX;
6738            final int oldScrollY = mScrollY;
6739
6740            if (mMovement != null) {
6741                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
6742            }
6743
6744            if (isTextEditable()) {
6745                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
6746                    // Hide insertion anchor while scrolling. Leave selection.
6747                    hideInsertionPointCursorController();
6748                    if (mSelectionModifierCursorController != null &&
6749                            mSelectionModifierCursorController.isShowing()) {
6750                        mSelectionModifierCursorController.updatePosition();
6751                    }
6752                }
6753                if (action == MotionEvent.ACTION_UP && isFocused() && !mScrolled) {
6754                    InputMethodManager imm = (InputMethodManager)
6755                          getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
6756
6757                    CommitSelectionReceiver csr = null;
6758                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
6759                            didTouchFocusSelect()) {
6760                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
6761                    }
6762
6763                    handled |= imm.showSoftInput(this, 0, csr) && (csr != null);
6764
6765                    // Cannot be done by CommitSelectionReceiver, which might not always be called,
6766                    // for instance when dealing with an ExtractEditText.
6767                    onTapUpEvent(oldSelStart, oldSelEnd);
6768                }
6769            }
6770
6771            if (handled) {
6772                return true;
6773            }
6774        }
6775
6776        return superResult;
6777    }
6778
6779    private void prepareCursorControllers() {
6780        // TODO Add an extra android:cursorController flag to disable the controller?
6781        if (mCursorVisible && mLayout != null) {
6782            if (mInsertionPointCursorController == null) {
6783                mInsertionPointCursorController = new InsertionPointCursorController();
6784            }
6785        } else {
6786            mInsertionPointCursorController = null;
6787        }
6788
6789        if (canSelectText() && mLayout != null) {
6790            if (mSelectionModifierCursorController == null) {
6791                mSelectionModifierCursorController = new SelectionModifierCursorController();
6792            }
6793        } else {
6794            // Stop selection mode if the controller becomes unavailable.
6795            stopTextSelectionMode();
6796            mSelectionModifierCursorController = null;
6797        }
6798    }
6799
6800    /**
6801     * @return True iff this TextView contains a text that can be edited.
6802     */
6803    private boolean isTextEditable() {
6804        return mText instanceof Editable && onCheckIsTextEditor();
6805    }
6806
6807    /**
6808     * Returns true, only while processing a touch gesture, if the initial
6809     * touch down event caused focus to move to the text view and as a result
6810     * its selection changed.  Only valid while processing the touch gesture
6811     * of interest.
6812     */
6813    public boolean didTouchFocusSelect() {
6814        return mTouchFocusSelected;
6815    }
6816
6817    @Override
6818    public void cancelLongPress() {
6819        super.cancelLongPress();
6820        mScrolled = true;
6821    }
6822
6823    @Override
6824    public boolean onTrackballEvent(MotionEvent event) {
6825        if (mMovement != null && mText instanceof Spannable &&
6826            mLayout != null) {
6827            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
6828                return true;
6829            }
6830        }
6831
6832        return super.onTrackballEvent(event);
6833    }
6834
6835    public void setScroller(Scroller s) {
6836        mScroller = s;
6837    }
6838
6839    private static class Blink extends Handler implements Runnable {
6840        private final WeakReference<TextView> mView;
6841        private boolean mCancelled;
6842
6843        public Blink(TextView v) {
6844            mView = new WeakReference<TextView>(v);
6845        }
6846
6847        public void run() {
6848            if (mCancelled) {
6849                return;
6850            }
6851
6852            removeCallbacks(Blink.this);
6853
6854            TextView tv = mView.get();
6855
6856            if (tv != null && tv.isFocused()) {
6857                int st = tv.getSelectionStart();
6858                int en = tv.getSelectionEnd();
6859
6860                if (st == en && st >= 0 && en >= 0) {
6861                    if (tv.mLayout != null) {
6862                        tv.invalidateCursorPath();
6863                    }
6864
6865                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
6866                }
6867            }
6868        }
6869
6870        void cancel() {
6871            if (!mCancelled) {
6872                removeCallbacks(Blink.this);
6873                mCancelled = true;
6874            }
6875        }
6876
6877        void uncancel() {
6878            mCancelled = false;
6879        }
6880    }
6881
6882    @Override
6883    protected float getLeftFadingEdgeStrength() {
6884        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6885            if (mMarquee != null && !mMarquee.isStopped()) {
6886                final Marquee marquee = mMarquee;
6887                if (marquee.shouldDrawLeftFade()) {
6888                    return marquee.mScroll / getHorizontalFadingEdgeLength();
6889                } else {
6890                    return 0.0f;
6891                }
6892            } else if (getLineCount() == 1) {
6893                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6894                    case Gravity.LEFT:
6895                        return 0.0f;
6896                    case Gravity.RIGHT:
6897                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
6898                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
6899                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
6900                    case Gravity.CENTER_HORIZONTAL:
6901                        return 0.0f;
6902                }
6903            }
6904        }
6905        return super.getLeftFadingEdgeStrength();
6906    }
6907
6908    @Override
6909    protected float getRightFadingEdgeStrength() {
6910        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6911            if (mMarquee != null && !mMarquee.isStopped()) {
6912                final Marquee marquee = mMarquee;
6913                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
6914            } else if (getLineCount() == 1) {
6915                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6916                    case Gravity.LEFT:
6917                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
6918                                getCompoundPaddingRight();
6919                        final float lineWidth = mLayout.getLineWidth(0);
6920                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
6921                    case Gravity.RIGHT:
6922                        return 0.0f;
6923                    case Gravity.CENTER_HORIZONTAL:
6924                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
6925                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
6926                                getHorizontalFadingEdgeLength();
6927                }
6928            }
6929        }
6930        return super.getRightFadingEdgeStrength();
6931    }
6932
6933    @Override
6934    protected int computeHorizontalScrollRange() {
6935        if (mLayout != null)
6936            return mLayout.getWidth();
6937
6938        return super.computeHorizontalScrollRange();
6939    }
6940
6941    @Override
6942    protected int computeVerticalScrollRange() {
6943        if (mLayout != null)
6944            return mLayout.getHeight();
6945
6946        return super.computeVerticalScrollRange();
6947    }
6948
6949    @Override
6950    protected int computeVerticalScrollExtent() {
6951        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
6952    }
6953
6954    public enum BufferType {
6955        NORMAL, SPANNABLE, EDITABLE,
6956    }
6957
6958    /**
6959     * Returns the TextView_textColor attribute from the
6960     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
6961     * from the TextView_textAppearance attribute, if TextView_textColor
6962     * was not set directly.
6963     */
6964    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
6965        ColorStateList colors;
6966        colors = attrs.getColorStateList(com.android.internal.R.styleable.
6967                                         TextView_textColor);
6968
6969        if (colors == null) {
6970            int ap = attrs.getResourceId(com.android.internal.R.styleable.
6971                                         TextView_textAppearance, -1);
6972            if (ap != -1) {
6973                TypedArray appearance;
6974                appearance = context.obtainStyledAttributes(ap,
6975                                            com.android.internal.R.styleable.TextAppearance);
6976                colors = appearance.getColorStateList(com.android.internal.R.styleable.
6977                                                  TextAppearance_textColor);
6978                appearance.recycle();
6979            }
6980        }
6981
6982        return colors;
6983    }
6984
6985    /**
6986     * Returns the default color from the TextView_textColor attribute
6987     * from the AttributeSet, if set, or the default color from the
6988     * TextAppearance_textColor from the TextView_textAppearance attribute,
6989     * if TextView_textColor was not set directly.
6990     */
6991    public static int getTextColor(Context context,
6992                                   TypedArray attrs,
6993                                   int def) {
6994        ColorStateList colors = getTextColors(context, attrs);
6995
6996        if (colors == null) {
6997            return def;
6998        } else {
6999            return colors.getDefaultColor();
7000        }
7001    }
7002
7003    @Override
7004    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7005        switch (keyCode) {
7006        case KeyEvent.KEYCODE_A:
7007            if (canSelectAll()) {
7008                return onTextContextMenuItem(ID_SELECT_ALL);
7009            }
7010
7011            break;
7012
7013        case KeyEvent.KEYCODE_X:
7014            if (canCut()) {
7015                return onTextContextMenuItem(ID_CUT);
7016            }
7017
7018            break;
7019
7020        case KeyEvent.KEYCODE_C:
7021            if (canCopy()) {
7022                return onTextContextMenuItem(ID_COPY);
7023            }
7024
7025            break;
7026
7027        case KeyEvent.KEYCODE_V:
7028            if (canPaste()) {
7029                return onTextContextMenuItem(ID_PASTE);
7030            }
7031
7032            break;
7033        }
7034
7035        return super.onKeyShortcut(keyCode, event);
7036    }
7037
7038    private boolean canSelectAll() {
7039        return canSelectText() && mText.length() != 0;
7040    }
7041
7042    private boolean canSelectText() {
7043        // prepareCursorController() relies on this method.
7044        // If you change this condition, make sure prepareCursorController is called anywhere
7045        // the value of this condition might be changed.
7046        return (mText instanceof Spannable &&
7047                mMovement != null &&
7048                mMovement.canSelectArbitrarily());
7049    }
7050
7051    private boolean canCut() {
7052        if (mTransformation instanceof PasswordTransformationMethod) {
7053            return false;
7054        }
7055
7056        if (mText.length() > 0 && hasSelection()) {
7057            if (mText instanceof Editable && mInput != null) {
7058                return true;
7059            }
7060        }
7061
7062        return false;
7063    }
7064
7065    private boolean canCopy() {
7066        if (mTransformation instanceof PasswordTransformationMethod) {
7067            return false;
7068        }
7069
7070        if (mText.length() > 0 && hasSelection()) {
7071            return true;
7072        }
7073
7074        return false;
7075    }
7076
7077    private boolean canPaste() {
7078        return (mText instanceof Editable &&
7079                mInput != null &&
7080                getSelectionStart() >= 0 &&
7081                getSelectionEnd() >= 0 &&
7082                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7083                hasText());
7084    }
7085
7086    /**
7087     * Returns the offsets delimiting the 'word' located at position offset.
7088     *
7089     * @param offset An offset in the text.
7090     * @return The offsets for the start and end of the word located at <code>offset</code>.
7091     * The two ints offsets are packed in a long, with the starting offset shifted by 32 bits.
7092     * Returns a negative value if no valid word was found.
7093     */
7094    private long getWordLimitsAt(int offset) {
7095        /*
7096         * Quick return if the input type is one where adding words
7097         * to the dictionary doesn't make any sense.
7098         */
7099        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7100        if (klass == InputType.TYPE_CLASS_NUMBER ||
7101            klass == InputType.TYPE_CLASS_PHONE ||
7102            klass == InputType.TYPE_CLASS_DATETIME) {
7103            return -1;
7104        }
7105
7106        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7107        if (variation == InputType.TYPE_TEXT_VARIATION_URI ||
7108            variation == InputType.TYPE_TEXT_VARIATION_PASSWORD ||
7109            variation == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD ||
7110            variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7111            variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7112            return -1;
7113        }
7114
7115        int len = mText.length();
7116        int end = Math.min(offset, len);
7117
7118        if (end < 0) {
7119            return -1;
7120        }
7121
7122        int start = end;
7123
7124        for (; start > 0; start--) {
7125            char c = mTransformed.charAt(start - 1);
7126            int type = Character.getType(c);
7127
7128            if (c != '\'' &&
7129                type != Character.UPPERCASE_LETTER &&
7130                type != Character.LOWERCASE_LETTER &&
7131                type != Character.TITLECASE_LETTER &&
7132                type != Character.MODIFIER_LETTER &&
7133                type != Character.DECIMAL_DIGIT_NUMBER) {
7134                break;
7135            }
7136        }
7137
7138        for (; end < len; end++) {
7139            char c = mTransformed.charAt(end);
7140            int type = Character.getType(c);
7141
7142            if (c != '\'' &&
7143                type != Character.UPPERCASE_LETTER &&
7144                type != Character.LOWERCASE_LETTER &&
7145                type != Character.TITLECASE_LETTER &&
7146                type != Character.MODIFIER_LETTER &&
7147                type != Character.DECIMAL_DIGIT_NUMBER) {
7148                break;
7149            }
7150        }
7151
7152        if (start == end) {
7153            return -1;
7154        }
7155
7156        if (end - start > 48) {
7157            return -1;
7158        }
7159
7160        boolean hasLetter = false;
7161        for (int i = start; i < end; i++) {
7162            if (Character.isLetter(mTransformed.charAt(i))) {
7163                hasLetter = true;
7164                break;
7165            }
7166        }
7167
7168        if (!hasLetter) {
7169            return -1;
7170        }
7171
7172        // Two ints packed in a long
7173        return (((long) start) << 32) | end;
7174    }
7175
7176    private void selectCurrentWord() {
7177        // In case selection mode is started after an orientation change or after a select all,
7178        // use the current selection instead of creating one
7179        if (hasSelection()) {
7180            return;
7181        }
7182
7183        int selectionStart, selectionEnd;
7184
7185        // selectionModifierCursorController is not null at that point
7186        SelectionModifierCursorController selectionModifierCursorController =
7187            ((SelectionModifierCursorController) mSelectionModifierCursorController);
7188        int minOffset = selectionModifierCursorController.getMinTouchOffset();
7189        int maxOffset = selectionModifierCursorController.getMaxTouchOffset();
7190
7191        if (minOffset == maxOffset) {
7192            int offset = Math.max(0, Math.min(minOffset, mTransformed.length()));
7193
7194            // Tolerance, number of charaters around tapped position
7195            final int range = 1;
7196            final int max = mTransformed.length() - 1;
7197
7198            // 'Smart' word selection: detect position between words
7199            for (int i = -range; i <= range; i++) {
7200                int index = offset + i;
7201                if (index >= 0 && index <= max) {
7202                    if (Character.isSpaceChar(mTransformed.charAt(index))) {
7203                        // Select current space
7204                        selectionStart = index;
7205                        selectionEnd = selectionStart + 1;
7206
7207                        // Extend selection to maximum space range
7208                        while (selectionStart > 0 &&
7209                                Character.isSpaceChar(mTransformed.charAt(selectionStart - 1))) {
7210                            selectionStart--;
7211                        }
7212                        while (selectionEnd < max &&
7213                                Character.isSpaceChar(mTransformed.charAt(selectionEnd))) {
7214                            selectionEnd++;
7215                        }
7216
7217                        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7218                        return;
7219                    }
7220                }
7221            }
7222
7223            // 'Smart' word selection: detect position at beginning or end of text.
7224            if (offset <= range) {
7225                Selection.setSelection((Spannable) mText, 0, 0);
7226                return;
7227            }
7228            if (offset >= (max - range)) {
7229                Selection.setSelection((Spannable) mText, max + 1, max + 1);
7230                return;
7231            }
7232        }
7233
7234        long wordLimits = getWordLimitsAt(minOffset);
7235        if (wordLimits >= 0) {
7236            selectionStart = (int) (wordLimits >>> 32);
7237        } else {
7238            selectionStart = Math.max(minOffset - 5, 0);
7239        }
7240
7241        wordLimits = getWordLimitsAt(maxOffset);
7242        if (wordLimits >= 0) {
7243            selectionEnd = (int) (wordLimits & 0x00000000FFFFFFFFL);
7244        } else {
7245            selectionEnd = Math.min(maxOffset + 5, mText.length());
7246        }
7247
7248        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7249    }
7250
7251    private String getWordForDictionary() {
7252        if (mLastTouchOffset < 0) {
7253            return null;
7254        }
7255
7256        long wordLimits = getWordLimitsAt(mLastTouchOffset);
7257        if (wordLimits >= 0) {
7258            int start = (int) (wordLimits >>> 32);
7259            int end = (int) (wordLimits & 0x00000000FFFFFFFFL);
7260            return mTransformed.subSequence(start, end).toString();
7261        } else {
7262            return null;
7263        }
7264    }
7265
7266    @Override
7267    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7268        if (!isShown()) {
7269            return false;
7270        }
7271
7272        final boolean isPassword = isPasswordInputType(mInputType);
7273
7274        if (!isPassword) {
7275            CharSequence text = getText();
7276            if (TextUtils.isEmpty(text)) {
7277                text = getHint();
7278            }
7279            if (!TextUtils.isEmpty(text)) {
7280                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7281                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7282                }
7283                event.getText().add(text);
7284            }
7285        } else {
7286            event.setPassword(isPassword);
7287        }
7288        return false;
7289    }
7290
7291    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7292            int fromIndex, int removedCount, int addedCount) {
7293        AccessibilityEvent event =
7294            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7295        event.setFromIndex(fromIndex);
7296        event.setRemovedCount(removedCount);
7297        event.setAddedCount(addedCount);
7298        event.setBeforeText(beforeText);
7299        sendAccessibilityEventUnchecked(event);
7300    }
7301
7302    @Override
7303    protected void onCreateContextMenu(ContextMenu menu) {
7304        super.onCreateContextMenu(menu);
7305        boolean added = false;
7306
7307        if (mIsInTextSelectionMode) {
7308            MenuHandler handler = new MenuHandler();
7309
7310            if (canCut()) {
7311                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
7312                     setOnMenuItemClickListener(handler).
7313                     setAlphabeticShortcut('x');
7314                added = true;
7315            }
7316
7317            if (canCopy()) {
7318                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7319                     setOnMenuItemClickListener(handler).
7320                     setAlphabeticShortcut('c');
7321                added = true;
7322            }
7323
7324            if (canPaste()) {
7325                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7326                     setOnMenuItemClickListener(handler).
7327                     setAlphabeticShortcut('v');
7328                added = true;
7329            }
7330        } else {
7331            /*
7332            if (!isFocused()) {
7333                if (isFocusable() && mInput != null) {
7334                    if (canCopy()) {
7335                        MenuHandler handler = new MenuHandler();
7336                        menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7337                             setOnMenuItemClickListener(handler).
7338                             setAlphabeticShortcut('c');
7339                        menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7340                    }
7341                }
7342
7343                //return;
7344            }
7345             */
7346            MenuHandler handler = new MenuHandler();
7347
7348            if (canSelectText()) {
7349                menu.add(0, ID_START_SELECTING_TEXT, 0, com.android.internal.R.string.selectText).
7350                setOnMenuItemClickListener(handler);
7351                added = true;
7352            }
7353
7354            if (canSelectAll()) {
7355                menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
7356                     setOnMenuItemClickListener(handler).
7357                     setAlphabeticShortcut('a');
7358                added = true;
7359            }
7360
7361            if (mText instanceof Spanned) {
7362                int selStart = getSelectionStart();
7363                int selEnd = getSelectionEnd();
7364
7365                int min = Math.min(selStart, selEnd);
7366                int max = Math.max(selStart, selEnd);
7367
7368                URLSpan[] urls = ((Spanned) mText).getSpans(min, max,
7369                        URLSpan.class);
7370                if (urls.length == 1) {
7371                    menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7372                         setOnMenuItemClickListener(handler);
7373                    added = true;
7374                }
7375            }
7376
7377            // Paste location is too imprecise. Only allow on empty text fields.
7378            if (canPaste() && textIsOnlySpaces()) {
7379                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7380                     setOnMenuItemClickListener(handler).
7381                     setAlphabeticShortcut('v');
7382                added = true;
7383            }
7384
7385            if (isInputMethodTarget()) {
7386                menu.add(1, ID_SWITCH_INPUT_METHOD, 0, com.android.internal.R.string.inputMethod).
7387                     setOnMenuItemClickListener(handler);
7388                added = true;
7389            }
7390
7391            String word = getWordForDictionary();
7392            if (word != null) {
7393                menu.add(1, ID_ADD_TO_DICTIONARY, 0,
7394                     getContext().getString(com.android.internal.R.string.addToDictionary, word)).
7395                     setOnMenuItemClickListener(handler);
7396                added = true;
7397
7398            }
7399        }
7400
7401        if (added) {
7402            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7403        }
7404    }
7405
7406    private boolean textIsOnlySpaces() {
7407        final int length = mTransformed.length();
7408        for (int i = 0; i < length; i++) {
7409            if (!Character.isSpaceChar(mTransformed.charAt(i))) {
7410                return false;
7411            }
7412        }
7413        return true;
7414    }
7415
7416    /**
7417     * Returns whether this text view is a current input method target.  The
7418     * default implementation just checks with {@link InputMethodManager}.
7419     */
7420    public boolean isInputMethodTarget() {
7421        InputMethodManager imm = InputMethodManager.peekInstance();
7422        return imm != null && imm.isActive(this);
7423    }
7424
7425    // Context menu entries
7426    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7427    private static final int ID_START_SELECTING_TEXT = android.R.id.startSelectingText;
7428    private static final int ID_CUT = android.R.id.cut;
7429    private static final int ID_COPY = android.R.id.copy;
7430    private static final int ID_PASTE = android.R.id.paste;
7431    private static final int ID_COPY_URL = android.R.id.copyUrl;
7432    private static final int ID_SWITCH_INPUT_METHOD = android.R.id.switchInputMethod;
7433    private static final int ID_ADD_TO_DICTIONARY = android.R.id.addToDictionary;
7434
7435    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7436        public boolean onMenuItemClick(MenuItem item) {
7437            return onTextContextMenuItem(item.getItemId());
7438        }
7439    }
7440
7441    /**
7442     * Called when a context menu option for the text view is selected.  Currently
7443     * this will be one of: {@link android.R.id#selectAll},
7444     * {@link android.R.id#startSelectingText},
7445     * {@link android.R.id#cut}, {@link android.R.id#copy},
7446     * {@link android.R.id#paste}, {@link android.R.id#copyUrl},
7447     * or {@link android.R.id#switchInputMethod}.
7448     */
7449    public boolean onTextContextMenuItem(int id) {
7450        int min = 0;
7451        int max = mText.length();
7452
7453        if (isFocused()) {
7454            final int selStart = getSelectionStart();
7455            final int selEnd = getSelectionEnd();
7456
7457            min = Math.max(0, Math.min(selStart, selEnd));
7458            max = Math.max(0, Math.max(selStart, selEnd));
7459        }
7460
7461        ClipboardManager clip = (ClipboardManager)getContext()
7462                .getSystemService(Context.CLIPBOARD_SERVICE);
7463
7464        switch (id) {
7465            case ID_SELECT_ALL:
7466                Selection.setSelection((Spannable) mText, 0, mText.length());
7467                startTextSelectionMode();
7468                return true;
7469
7470            case ID_START_SELECTING_TEXT:
7471                startTextSelectionMode();
7472                return true;
7473
7474            case ID_CUT:
7475                clip.setText(mTransformed.subSequence(min, max));
7476                ((Editable) mText).delete(min, max);
7477                stopTextSelectionMode();
7478                return true;
7479
7480            case ID_COPY:
7481                clip.setText(mTransformed.subSequence(min, max));
7482                stopTextSelectionMode();
7483                return true;
7484
7485            case ID_PASTE:
7486                CharSequence paste = clip.getText();
7487
7488                if (paste != null && paste.length() > 0) {
7489                    // Paste adds/removes spaces before or after insertion as needed.
7490
7491                    if (Character.isSpaceChar(paste.charAt(0))) {
7492                        if (min > 0 && Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7493                            // Two spaces at beginning of paste: remove one
7494                            ((Editable) mText).replace(min - 1, min, "");
7495                            min = min - 1;
7496                            max = max - 1;
7497                        }
7498                    } else {
7499                        if (min > 0 && !Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7500                            // No space at beginning of paste: add one
7501                            ((Editable) mText).replace(min, min, " ");
7502                            min = min + 1;
7503                            max = max + 1;
7504                        }
7505                    }
7506
7507                    if (Character.isSpaceChar(paste.charAt(paste.length() - 1))) {
7508                        if (max < mText.length() && Character.isSpaceChar(mTransformed.charAt(max))) {
7509                            // Two spaces at end of paste: remove one
7510                            ((Editable) mText).replace(max, max + 1, "");
7511                        }
7512                    } else {
7513                        if (max < mText.length() && !Character.isSpaceChar(mTransformed.charAt(max))) {
7514                            // No space at end of paste: add one
7515                            ((Editable) mText).replace(max, max, " ");
7516                        }
7517                    }
7518
7519                    Selection.setSelection((Spannable) mText, max);
7520                    ((Editable) mText).replace(min, max, paste);
7521                    stopTextSelectionMode();
7522                }
7523                return true;
7524
7525            case ID_COPY_URL:
7526                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7527                if (urls.length == 1) {
7528                    clip.setText(urls[0].getURL());
7529                }
7530                return true;
7531
7532            case ID_SWITCH_INPUT_METHOD:
7533                InputMethodManager imm = InputMethodManager.peekInstance();
7534                if (imm != null) {
7535                    imm.showInputMethodPicker();
7536                }
7537                return true;
7538
7539            case ID_ADD_TO_DICTIONARY:
7540                String word = getWordForDictionary();
7541
7542                if (word != null) {
7543                    Intent i = new Intent("com.android.settings.USER_DICTIONARY_INSERT");
7544                    i.putExtra("word", word);
7545                    i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
7546                    getContext().startActivity(i);
7547                }
7548                return true;
7549            }
7550
7551        return false;
7552    }
7553
7554    @Override
7555    public boolean performLongClick() {
7556        if (super.performLongClick()) {
7557            mEatTouchRelease = true;
7558            return true;
7559        }
7560
7561        return false;
7562    }
7563
7564    private void startTextSelectionMode() {
7565        if (!mIsInTextSelectionMode) {
7566            if (mSelectionModifierCursorController == null) {
7567                Log.w(LOG_TAG, "TextView has no selection controller. Action mode cancelled.");
7568                return;
7569            }
7570
7571            if (!requestFocus()) {
7572                return;
7573            }
7574
7575            selectCurrentWord();
7576            mSelectionModifierCursorController.show();
7577            mIsInTextSelectionMode = true;
7578        }
7579    }
7580
7581    /**
7582     * Same as {@link #stopTextSelectionMode()}, except that there is no cursor controller
7583     * fade out animation. Needed since the drawable and their alpha values are shared by all
7584     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
7585     * new one otherwise.
7586     */
7587    private void terminateTextSelectionMode() {
7588        stopTextSelectionMode();
7589        if (mSelectionModifierCursorController != null) {
7590            SelectionModifierCursorController selectionModifierCursorController =
7591                (SelectionModifierCursorController) mSelectionModifierCursorController;
7592            selectionModifierCursorController.cancelFadeOutAnimation();
7593        }
7594    }
7595
7596    private void stopTextSelectionMode() {
7597        if (mIsInTextSelectionMode) {
7598            Selection.setSelection((Spannable) mText, getSelectionEnd());
7599            if (mSelectionModifierCursorController != null) {
7600                mSelectionModifierCursorController.hide();
7601            }
7602
7603            mIsInTextSelectionMode = false;
7604        }
7605    }
7606
7607    /**
7608     * A CursorController instance can be used to control a cursor in the text.
7609     *
7610     * It can be passed to an {@link ArrowKeyMovementMethod} which can intercepts events
7611     * and send them to this object instead of the cursor.
7612     *
7613     * @hide
7614     */
7615    public interface CursorController {
7616        /* Cursor fade-out animation duration, in milliseconds. */
7617        static final int FADE_OUT_DURATION = 400;
7618
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(int x, int y);
7640
7641        public void updatePosition();
7642
7643        /**
7644         * The controller and the cursor's positions can be link by a fixed offset,
7645         * computed when the controller is touched, and then maintained as it moves
7646         * @return Horizontal offset between the controller and the cursor.
7647         */
7648        public float getOffsetX();
7649
7650        /**
7651         * @return Vertical offset between the controller and the cursor.
7652         */
7653        public float getOffsetY();
7654
7655        /**
7656         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
7657         * a chance to become active and/or visible.
7658         * @param event The touch event
7659         */
7660        public boolean onTouchEvent(MotionEvent event);
7661    }
7662
7663    private class HandleView extends View {
7664        private boolean mPositionOnTop = false;
7665        private Drawable mDrawable;
7666        private PopupWindow mContainer;
7667        private int mPositionX;
7668        private int mPositionY;
7669        private CursorController mController;
7670        private boolean mIsDragging;
7671
7672        public HandleView(CursorController controller, Drawable handle) {
7673            super(TextView.this.mContext);
7674            mController = controller;
7675            mDrawable = handle;
7676            mContainer = new PopupWindow(TextView.this.mContext, null,
7677                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7678        }
7679
7680        @Override
7681        public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
7682            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
7683                    mDrawable.getIntrinsicHeight());
7684        }
7685
7686        public void show() {
7687            if (!isPositionInBounds()) {
7688                hide();
7689                return;
7690            }
7691            mContainer.setContentView(this);
7692            final int[] coords = mTempCoords;
7693            TextView.this.getLocationOnScreen(coords);
7694            coords[0] += mPositionX;
7695            coords[1] += mPositionY;
7696            mContainer.showAtLocation(TextView.this, 0, coords[0], coords[1]);
7697        }
7698
7699        public void hide() {
7700            mIsDragging = false;
7701            mContainer.dismiss();
7702        }
7703
7704        public boolean isShowing() {
7705            return mContainer.isShowing();
7706        }
7707
7708        private boolean isPositionInBounds() {
7709            final int extendedPaddingTop = getExtendedPaddingTop();
7710            final int extendedPaddingBottom = getExtendedPaddingBottom();
7711            final int compoundPaddingLeft = getCompoundPaddingLeft();
7712            final int compoundPaddingRight = getCompoundPaddingRight();
7713
7714            final TextView hostView = TextView.this;
7715            final int right = hostView.mRight;
7716            final int left = hostView.mLeft;
7717            final int bottom = hostView.mBottom;
7718            final int top = hostView.mTop;
7719
7720            final int clipLeft = left + compoundPaddingLeft;
7721            final int clipTop = top + extendedPaddingTop;
7722            final int clipRight = right - compoundPaddingRight;
7723            final int clipBottom = bottom - extendedPaddingBottom;
7724
7725            final int handleWidth = mDrawable.getIntrinsicWidth();
7726            return mPositionX >= clipLeft - handleWidth * 0.75f &&
7727                    mPositionX <= clipRight + handleWidth * 0.25f &&
7728                    mPositionY >= clipTop && mPositionY <= clipBottom;
7729        }
7730
7731        private void moveTo(int x, int y) {
7732            mPositionX = x - TextView.this.mScrollX;
7733            mPositionY = y - TextView.this.mScrollY;
7734            if (isPositionInBounds()) {
7735                if (mContainer.isShowing()){
7736                    final int[] coords = mTempCoords;
7737                    TextView.this.getLocationOnScreen(coords);
7738                    coords[0] += mPositionX;
7739                    coords[1] += mPositionY;
7740                    mContainer.update(coords[0], coords[1], mRight - mLeft, mBottom - mTop);
7741                } else {
7742                    show();
7743                }
7744            } else {
7745                hide();
7746            }
7747        }
7748
7749        @Override
7750        public void onDraw(Canvas c) {
7751            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
7752            if (mPositionOnTop) {
7753                c.save();
7754                c.rotate(180, (mRight - mLeft) / 2, (mBottom - mTop) / 2);
7755                mDrawable.draw(c);
7756                c.restore();
7757            } else {
7758                mDrawable.draw(c);
7759            }
7760        }
7761
7762        @Override
7763        public boolean onTouchEvent(MotionEvent ev) {
7764            switch (ev.getActionMasked()) {
7765            case MotionEvent.ACTION_DOWN:
7766                mIsDragging = true;
7767                break;
7768
7769            case MotionEvent.ACTION_MOVE:
7770                final float rawX = ev.getRawX();
7771                final float rawY = ev.getRawY();
7772                final int[] coords = mTempCoords;
7773                TextView.this.getLocationOnScreen(coords);
7774                final int x = (int) (rawX - coords[0] + 0.5f);
7775                final int y = (int) (rawY - coords[1] + 0.5f);
7776                mController.updatePosition(x, y);
7777                break;
7778
7779            case MotionEvent.ACTION_UP:
7780            case MotionEvent.ACTION_CANCEL:
7781                mIsDragging = false;
7782            }
7783            return true;
7784        }
7785
7786        public boolean isDragging() {
7787            return mIsDragging;
7788        }
7789
7790        void positionAtCursor(final int offset, boolean bottom) {
7791            final int width = mDrawable.getIntrinsicWidth();
7792            final int height = mDrawable.getIntrinsicHeight();
7793            final int line = mLayout.getLineForOffset(offset);
7794            final int lineTop = mLayout.getLineTop(line);
7795            final int lineBottom = mLayout.getLineBottom(line);
7796
7797            final Rect bounds = sCursorControllerTempRect;
7798            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0)
7799                + TextView.this.mScrollX;
7800            bounds.top = (bottom ? lineBottom : lineTop) + TextView.this.mScrollY;
7801
7802            bounds.right = bounds.left + width;
7803            bounds.bottom = bounds.top + height;
7804
7805            convertFromViewportToContentCoordinates(bounds);
7806            moveTo(bounds.left, bounds.top);
7807        }
7808    }
7809
7810    class InsertionPointCursorController implements CursorController {
7811        private static final int DELAY_BEFORE_FADE_OUT = 4100;
7812
7813        // The cursor controller image
7814        private final HandleView mHandle;
7815        // Offset between finger hot point on cursor controller and actual cursor
7816        private float mOffsetX, mOffsetY;
7817
7818        private final Runnable mHider = new Runnable() {
7819            public void run() {
7820                hide();
7821            }
7822        };
7823
7824        InsertionPointCursorController() {
7825            Resources res = mContext.getResources();
7826            mHandle = new HandleView(this, res.getDrawable(mTextSelectHandleRes));
7827        }
7828
7829        public void show() {
7830            updatePosition();
7831            mHandle.show();
7832            hideDelayed(DELAY_BEFORE_FADE_OUT);
7833        }
7834
7835        public void hide() {
7836            mHandle.hide();
7837            TextView.this.removeCallbacks(mHider);
7838        }
7839
7840        private void hideDelayed(int msec) {
7841            TextView.this.removeCallbacks(mHider);
7842            TextView.this.postDelayed(mHider, msec);
7843        }
7844
7845        public boolean isShowing() {
7846            return mHandle.isShowing();
7847        }
7848
7849        public void updatePosition(int x, int y) {
7850            final int previousOffset = getSelectionStart();
7851            int offset = getHysteresisOffset(x, y, previousOffset);
7852
7853            if (offset != previousOffset) {
7854                Selection.setSelection((Spannable) mText, offset);
7855                updatePosition();
7856            }
7857            hideDelayed(DELAY_BEFORE_FADE_OUT);
7858        }
7859
7860        public void updatePosition() {
7861            final int offset = getSelectionStart();
7862
7863            if (offset < 0) {
7864                // Should never happen, safety check.
7865                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
7866                hide();
7867                return;
7868            }
7869
7870            mHandle.positionAtCursor(offset, true);
7871        }
7872
7873        public float getOffsetX() {
7874            return mOffsetX;
7875        }
7876
7877        public float getOffsetY() {
7878            return mOffsetY;
7879        }
7880
7881        public boolean onTouchEvent(MotionEvent ev) {
7882            return false;
7883        }
7884    }
7885
7886    class SelectionModifierCursorController implements CursorController {
7887        // The cursor controller images
7888        private HandleView mStartHandle, mEndHandle;
7889        // Offset between finger hot point on active cursor controller and actual cursor
7890        private float mOffsetX, mOffsetY;
7891        // The offsets of that last touch down event. Remembered to start selection there.
7892        private int mMinTouchOffset, mMaxTouchOffset;
7893        // Whether selection anchors are active
7894        private boolean mIsShowing;
7895
7896        SelectionModifierCursorController() {
7897            Resources res = mContext.getResources();
7898            mStartHandle = new HandleView(this, res.getDrawable(mTextSelectHandleLeftRes));
7899            mEndHandle = new HandleView(this, res.getDrawable(mTextSelectHandleRightRes));
7900        }
7901
7902        public void show() {
7903            mIsShowing = true;
7904            updatePosition();
7905            mStartHandle.show();
7906            mEndHandle.show();
7907            hideInsertionPointCursorController();
7908        }
7909
7910        public void hide() {
7911            mStartHandle.hide();
7912            mEndHandle.hide();
7913            mIsShowing = false;
7914        }
7915
7916        public boolean isShowing() {
7917            return mIsShowing;
7918        }
7919
7920        public void cancelFadeOutAnimation() {
7921            hide();
7922        }
7923
7924        public void updatePosition(int x, int y) {
7925            int selectionStart = getSelectionStart();
7926            int selectionEnd = getSelectionEnd();
7927
7928            final int previousOffset = mStartHandle.isDragging() ? selectionStart : selectionEnd;
7929            int offset = getHysteresisOffset(x, y, previousOffset);
7930
7931            // Handle the case where start and end are swapped, making sure start <= end
7932            if (mStartHandle.isDragging()) {
7933                if (offset <= selectionEnd) {
7934                    if (selectionStart == offset) {
7935                        return; // no change, no need to redraw;
7936                    }
7937                    selectionStart = offset;
7938                } else {
7939                    selectionStart = selectionEnd;
7940                    selectionEnd = offset;
7941                    HandleView temp = mStartHandle;
7942                    mStartHandle = mEndHandle;
7943                    mEndHandle = temp;
7944                }
7945            } else {
7946                if (offset >= selectionStart) {
7947                    if (selectionEnd == offset) {
7948                        return; // no change, no need to redraw;
7949                    }
7950                    selectionEnd = offset;
7951                } else {
7952                    selectionEnd = selectionStart;
7953                    selectionStart = offset;
7954                    HandleView temp = mStartHandle;
7955                    mStartHandle = mEndHandle;
7956                    mEndHandle = temp;
7957                }
7958            }
7959
7960            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7961            updatePosition();
7962        }
7963
7964        public void updatePosition() {
7965            final int selectionStart = getSelectionStart();
7966            final int selectionEnd = getSelectionEnd();
7967
7968            if ((selectionStart < 0) || (selectionEnd < 0)) {
7969                // Should never happen, safety check.
7970                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
7971                hide();
7972                return;
7973            }
7974
7975            boolean oneLineSelection = mLayout.getLineForOffset(selectionStart) ==
7976                    mLayout.getLineForOffset(selectionEnd);
7977            mStartHandle.positionAtCursor(selectionStart, oneLineSelection);
7978            mEndHandle.positionAtCursor(selectionEnd, true);
7979        }
7980
7981        public boolean onTouchEvent(MotionEvent event) {
7982            if (isFocused() && isTextEditable()) {
7983                switch (event.getActionMasked()) {
7984                    case MotionEvent.ACTION_DOWN:
7985                        final int x = (int) event.getX();
7986                        final int y = (int) event.getY();
7987
7988                        // Remember finger down position, to be able to start selection from there
7989                        mMinTouchOffset = mMaxTouchOffset = mLastTouchOffset = getOffset(x, y);
7990
7991                        break;
7992
7993                    case MotionEvent.ACTION_POINTER_DOWN:
7994                    case MotionEvent.ACTION_POINTER_UP:
7995                        // Handle multi-point gestures. Keep min and max offset positions.
7996                        // Only activated for devices that correctly handle multi-touch.
7997                        if (mContext.getPackageManager().hasSystemFeature(
7998                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
7999                            updateMinAndMaxOffsets(event);
8000                        }
8001                        break;
8002                }
8003            }
8004            return false;
8005        }
8006
8007        /**
8008         * @param event
8009         */
8010        private void updateMinAndMaxOffsets(MotionEvent event) {
8011            int pointerCount = event.getPointerCount();
8012            for (int index = 0; index < pointerCount; index++) {
8013                final int x = (int) event.getX(index);
8014                final int y = (int) event.getY(index);
8015                int offset = getOffset(x, y);
8016                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
8017                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
8018            }
8019        }
8020
8021        public int getMinTouchOffset() {
8022            return mMinTouchOffset;
8023        }
8024
8025        public int getMaxTouchOffset() {
8026            return mMaxTouchOffset;
8027        }
8028
8029        public float getOffsetX() {
8030            return mOffsetX;
8031        }
8032
8033        public float getOffsetY() {
8034            return mOffsetY;
8035        }
8036
8037        /**
8038         * @return true iff this controller is currently used to move the selection start.
8039         */
8040        public boolean isSelectionStartDragged() {
8041            return mStartHandle.isDragging();
8042        }
8043    }
8044
8045    private void hideInsertionPointCursorController() {
8046        if (mInsertionPointCursorController != null) {
8047            mInsertionPointCursorController.hide();
8048        }
8049    }
8050
8051    private void hideControllers() {
8052        hideInsertionPointCursorController();
8053        stopTextSelectionMode();
8054    }
8055
8056    private int getOffsetForHorizontal(int line, int x) {
8057        x -= getTotalPaddingLeft();
8058        // Clamp the position to inside of the view.
8059        x = Math.max(0, x);
8060        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
8061        x += getScrollX();
8062        return getLayout().getOffsetForHorizontal(line, x);
8063    }
8064
8065    /**
8066     * Get the offset character closest to the specified absolute position.
8067     *
8068     * @param x The horizontal absolute position of a point on screen
8069     * @param y The vertical absolute position of a point on screen
8070     * @return the character offset for the character whose position is closest to the specified
8071     *  position. Returns -1 if there is no layout.
8072     *
8073     * @hide
8074     */
8075    public int getOffset(int x, int y) {
8076        if (getLayout() == null) return -1;
8077
8078        y -= getTotalPaddingTop();
8079        // Clamp the position to inside of the view.
8080        y = Math.max(0, y);
8081        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8082        y += getScrollY();
8083
8084        final int line = getLayout().getLineForVertical(y);
8085        final int offset = getOffsetForHorizontal(line, x);
8086        return offset;
8087    }
8088
8089    int getHysteresisOffset(int x, int y, int previousOffset) {
8090        final Layout layout = getLayout();
8091        if (layout == null) return -1;
8092
8093        y -= getTotalPaddingTop();
8094        // Clamp the position to inside of the view.
8095        y = Math.max(0, y);
8096        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8097        y += getScrollY();
8098
8099        int line = getLayout().getLineForVertical(y);
8100
8101        final int previousLine = layout.getLineForOffset(previousOffset);
8102        final int previousLineTop = layout.getLineTop(previousLine);
8103        final int previousLineBottom = layout.getLineBottom(previousLine);
8104        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 2;
8105
8106        // If new line is just before or after previous line and y position is less than
8107        // hysteresisThreshold away from previous line, keep cursor on previous line.
8108        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
8109            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
8110            line = previousLine;
8111        }
8112
8113        return getOffsetForHorizontal(line, x);
8114    }
8115
8116    @ViewDebug.ExportedProperty
8117    private CharSequence            mText;
8118    private CharSequence            mTransformed;
8119    private BufferType              mBufferType = BufferType.NORMAL;
8120
8121    private int                     mInputType = EditorInfo.TYPE_NULL;
8122    private CharSequence            mHint;
8123    private Layout                  mHintLayout;
8124
8125    private KeyListener             mInput;
8126
8127    private MovementMethod          mMovement;
8128    private TransformationMethod    mTransformation;
8129    private ChangeWatcher           mChangeWatcher;
8130
8131    private ArrayList<TextWatcher>  mListeners = null;
8132
8133    // display attributes
8134    private final TextPaint         mTextPaint;
8135    private boolean                 mUserSetTextScaleX;
8136    private final Paint             mHighlightPaint;
8137    private int                     mHighlightColor = 0xCC475925;
8138    private Layout                  mLayout;
8139
8140    private long                    mShowCursor;
8141    private Blink                   mBlink;
8142    private boolean                 mCursorVisible = true;
8143
8144    // Cursor Controllers. Null when disabled.
8145    private CursorController        mInsertionPointCursorController;
8146    private CursorController        mSelectionModifierCursorController;
8147    private boolean                 mIsInTextSelectionMode = false;
8148    private int                     mLastTouchOffset = -1;
8149    // Created once and shared by different CursorController helper methods.
8150    // Only one cursor controller is active at any time which prevent race conditions.
8151    private static Rect             sCursorControllerTempRect = new Rect();
8152
8153    private boolean                 mSelectAllOnFocus = false;
8154
8155    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
8156    private boolean                 mHorizontallyScrolling;
8157
8158    private int                     mAutoLinkMask;
8159    private boolean                 mLinksClickable = true;
8160
8161    private float                   mSpacingMult = 1;
8162    private float                   mSpacingAdd = 0;
8163
8164    private static final int        LINES = 1;
8165    private static final int        EMS = LINES;
8166    private static final int        PIXELS = 2;
8167
8168    private int                     mMaximum = Integer.MAX_VALUE;
8169    private int                     mMaxMode = LINES;
8170    private int                     mMinimum = 0;
8171    private int                     mMinMode = LINES;
8172
8173    private int                     mMaxWidth = Integer.MAX_VALUE;
8174    private int                     mMaxWidthMode = PIXELS;
8175    private int                     mMinWidth = 0;
8176    private int                     mMinWidthMode = PIXELS;
8177
8178    private boolean                 mSingleLine;
8179    private int                     mDesiredHeightAtMeasure = -1;
8180    private boolean                 mIncludePad = true;
8181
8182    // tmp primitives, so we don't alloc them on each draw
8183    private Path                    mHighlightPath;
8184    private boolean                 mHighlightPathBogus = true;
8185    private static final RectF      sTempRect = new RectF();
8186
8187    // XXX should be much larger
8188    private static final int        VERY_WIDE = 16384;
8189
8190    private static final int        BLINK = 500;
8191
8192    private static final int ANIMATED_SCROLL_GAP = 250;
8193    private long mLastScroll;
8194    private Scroller mScroller = null;
8195
8196    private BoringLayout.Metrics mBoring;
8197    private BoringLayout.Metrics mHintBoring;
8198
8199    private BoringLayout mSavedLayout, mSavedHintLayout;
8200
8201    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
8202    private InputFilter[] mFilters = NO_FILTERS;
8203    private static final Spanned EMPTY_SPANNED = new SpannedString("");
8204}
8205