TextView.java revision 4d4d62b23aa84e740c2abc543a4198863e103476 
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 ColorStateList mTextColor;
198    private int mCurTextColor;
199    private ColorStateList mHintTextColor;
200    private ColorStateList mLinkTextColor;
201    private int mCurHintTextColor;
202    private boolean mFreezesText;
203    private boolean mFrozenWithFocus;
204    private boolean mTemporaryDetach;
205    private boolean mDispatchTemporaryDetach;
206
207    private boolean mEatTouchRelease = false;
208    private boolean mScrolled = false;
209
210    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
211    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
212
213    private float mShadowRadius, mShadowDx, mShadowDy;
214
215    private static final int PREDRAW_NOT_REGISTERED = 0;
216    private static final int PREDRAW_PENDING = 1;
217    private static final int PREDRAW_DONE = 2;
218    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
219
220    private TextUtils.TruncateAt mEllipsize = null;
221
222    // Enum for the "typeface" XML parameter.
223    // TODO: How can we get this from the XML instead of hardcoding it here?
224    private static final int SANS = 1;
225    private static final int SERIF = 2;
226    private static final int MONOSPACE = 3;
227
228    // Bitfield for the "numeric" XML parameter.
229    // TODO: How can we get this from the XML instead of hardcoding it here?
230    private static final int SIGNED = 2;
231    private static final int DECIMAL = 4;
232
233    class Drawables {
234        final Rect mCompoundRect = new Rect();
235        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
236        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
237        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
238        int mDrawablePadding;
239    }
240    private Drawables mDrawables;
241
242    private CharSequence mError;
243    private boolean mErrorWasChanged;
244    private ErrorPopup mPopup;
245    /**
246     * This flag is set if the TextView tries to display an error before it
247     * is attached to the window (so its position is still unknown).
248     * It causes the error to be shown later, when onAttachedToWindow()
249     * is called.
250     */
251    private boolean mShowErrorAfterAttach;
252
253    private CharWrapper mCharWrapper = null;
254
255    private boolean mSelectionMoved = false;
256    private boolean mTouchFocusSelected = false;
257
258    private Marquee mMarquee;
259    private boolean mRestartMarquee;
260
261    private int mMarqueeRepeatLimit = 3;
262
263    class InputContentType {
264        int imeOptions = EditorInfo.IME_NULL;
265        String privateImeOptions;
266        CharSequence imeActionLabel;
267        int imeActionId;
268        Bundle extras;
269        OnEditorActionListener onEditorActionListener;
270        boolean enterDown;
271    }
272    InputContentType mInputContentType;
273
274    class InputMethodState {
275        Rect mCursorRectInWindow = new Rect();
276        RectF mTmpRectF = new RectF();
277        float[] mTmpOffset = new float[2];
278        ExtractedTextRequest mExtracting;
279        final ExtractedText mTmpExtracted = new ExtractedText();
280        int mBatchEditNesting;
281        boolean mCursorChanged;
282        boolean mSelectionModeChanged;
283        boolean mContentChanged;
284        int mChangedStart, mChangedEnd, mChangedDelta;
285    }
286    InputMethodState mInputMethodState;
287
288    private int mTextSelectHandleLeftRes;
289    private int mTextSelectHandleRightRes;
290    private int mTextSelectHandleRes;
291
292    /*
293     * Kick-start the font cache for the zygote process (to pay the cost of
294     * initializing freetype for our default font only once).
295     */
296    static {
297        Paint p = new Paint();
298        p.setAntiAlias(true);
299        // We don't care about the result, just the side-effect of measuring.
300        p.measureText("H");
301    }
302
303    /**
304     * Interface definition for a callback to be invoked when an action is
305     * performed on the editor.
306     */
307    public interface OnEditorActionListener {
308        /**
309         * Called when an action is being performed.
310         *
311         * @param v The view that was clicked.
312         * @param actionId Identifier of the action.  This will be either the
313         * identifier you supplied, or {@link EditorInfo#IME_NULL
314         * EditorInfo.IME_NULL} if being called due to the enter key
315         * being pressed.
316         * @param event If triggered by an enter key, this is the event;
317         * otherwise, this is null.
318         * @return Return true if you have consumed the action, else false.
319         */
320        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
321    }
322
323    public TextView(Context context) {
324        this(context, null);
325    }
326
327    public TextView(Context context,
328                    AttributeSet attrs) {
329        this(context, attrs, com.android.internal.R.attr.textViewStyle);
330    }
331
332    @SuppressWarnings("deprecation")
333    public TextView(Context context,
334                    AttributeSet attrs,
335                    int defStyle) {
336        super(context, attrs, defStyle);
337        mText = "";
338
339        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
340        mTextPaint.density = getResources().getDisplayMetrics().density;
341        mTextPaint.setCompatibilityScaling(
342                getResources().getCompatibilityInfo().applicationScale);
343
344        // If we get the paint from the skin, we should set it to left, since
345        // the layout always wants it to be left.
346        // mTextPaint.setTextAlign(Paint.Align.LEFT);
347
348        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
349        mHighlightPaint.setCompatibilityScaling(
350                getResources().getCompatibilityInfo().applicationScale);
351
352        mMovement = getDefaultMovementMethod();
353        mTransformation = null;
354
355        TypedArray a =
356            context.obtainStyledAttributes(
357                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
358
359        int textColorHighlight = 0;
360        ColorStateList textColor = null;
361        ColorStateList textColorHint = null;
362        ColorStateList textColorLink = null;
363        int textSize = 15;
364        int typefaceIndex = -1;
365        int styleIndex = -1;
366
367        /*
368         * Look the appearance up without checking first if it exists because
369         * almost every TextView has one and it greatly simplifies the logic
370         * to be able to parse the appearance first and then let specific tags
371         * for this View override it.
372         */
373        TypedArray appearance = null;
374        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
375        if (ap != -1) {
376            appearance = context.obtainStyledAttributes(ap,
377                                com.android.internal.R.styleable.
378                                TextAppearance);
379        }
380        if (appearance != null) {
381            int n = appearance.getIndexCount();
382            for (int i = 0; i < n; i++) {
383                int attr = appearance.getIndex(i);
384
385                switch (attr) {
386                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
387                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
388                    break;
389
390                case com.android.internal.R.styleable.TextAppearance_textColor:
391                    textColor = appearance.getColorStateList(attr);
392                    break;
393
394                case com.android.internal.R.styleable.TextAppearance_textColorHint:
395                    textColorHint = appearance.getColorStateList(attr);
396                    break;
397
398                case com.android.internal.R.styleable.TextAppearance_textColorLink:
399                    textColorLink = appearance.getColorStateList(attr);
400                    break;
401
402                case com.android.internal.R.styleable.TextAppearance_textSize:
403                    textSize = appearance.getDimensionPixelSize(attr, textSize);
404                    break;
405
406                case com.android.internal.R.styleable.TextAppearance_typeface:
407                    typefaceIndex = appearance.getInt(attr, -1);
408                    break;
409
410                case com.android.internal.R.styleable.TextAppearance_textStyle:
411                    styleIndex = appearance.getInt(attr, -1);
412                    break;
413                }
414            }
415
416            appearance.recycle();
417        }
418
419        boolean editable = getDefaultEditable();
420        CharSequence inputMethod = null;
421        int numeric = 0;
422        CharSequence digits = null;
423        boolean phone = false;
424        boolean autotext = false;
425        int autocap = -1;
426        int buffertype = 0;
427        boolean selectallonfocus = false;
428        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
429            drawableBottom = null;
430        int drawablePadding = 0;
431        int ellipsize = -1;
432        boolean singleLine = false;
433        int maxlength = -1;
434        CharSequence text = "";
435        CharSequence hint = null;
436        int shadowcolor = 0;
437        float dx = 0, dy = 0, r = 0;
438        boolean password = false;
439        int inputType = EditorInfo.TYPE_NULL;
440
441        int n = a.getIndexCount();
442        for (int i = 0; i < n; i++) {
443            int attr = a.getIndex(i);
444
445            switch (attr) {
446            case com.android.internal.R.styleable.TextView_editable:
447                editable = a.getBoolean(attr, editable);
448                break;
449
450            case com.android.internal.R.styleable.TextView_inputMethod:
451                inputMethod = a.getText(attr);
452                break;
453
454            case com.android.internal.R.styleable.TextView_numeric:
455                numeric = a.getInt(attr, numeric);
456                break;
457
458            case com.android.internal.R.styleable.TextView_digits:
459                digits = a.getText(attr);
460                break;
461
462            case com.android.internal.R.styleable.TextView_phoneNumber:
463                phone = a.getBoolean(attr, phone);
464                break;
465
466            case com.android.internal.R.styleable.TextView_autoText:
467                autotext = a.getBoolean(attr, autotext);
468                break;
469
470            case com.android.internal.R.styleable.TextView_capitalize:
471                autocap = a.getInt(attr, autocap);
472                break;
473
474            case com.android.internal.R.styleable.TextView_bufferType:
475                buffertype = a.getInt(attr, buffertype);
476                break;
477
478            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
479                selectallonfocus = a.getBoolean(attr, selectallonfocus);
480                break;
481
482            case com.android.internal.R.styleable.TextView_autoLink:
483                mAutoLinkMask = a.getInt(attr, 0);
484                break;
485
486            case com.android.internal.R.styleable.TextView_linksClickable:
487                mLinksClickable = a.getBoolean(attr, true);
488                break;
489
490            case com.android.internal.R.styleable.TextView_drawableLeft:
491                drawableLeft = a.getDrawable(attr);
492                break;
493
494            case com.android.internal.R.styleable.TextView_drawableTop:
495                drawableTop = a.getDrawable(attr);
496                break;
497
498            case com.android.internal.R.styleable.TextView_drawableRight:
499                drawableRight = a.getDrawable(attr);
500                break;
501
502            case com.android.internal.R.styleable.TextView_drawableBottom:
503                drawableBottom = a.getDrawable(attr);
504                break;
505
506            case com.android.internal.R.styleable.TextView_drawablePadding:
507                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
508                break;
509
510            case com.android.internal.R.styleable.TextView_maxLines:
511                setMaxLines(a.getInt(attr, -1));
512                break;
513
514            case com.android.internal.R.styleable.TextView_maxHeight:
515                setMaxHeight(a.getDimensionPixelSize(attr, -1));
516                break;
517
518            case com.android.internal.R.styleable.TextView_lines:
519                setLines(a.getInt(attr, -1));
520                break;
521
522            case com.android.internal.R.styleable.TextView_height:
523                setHeight(a.getDimensionPixelSize(attr, -1));
524                break;
525
526            case com.android.internal.R.styleable.TextView_minLines:
527                setMinLines(a.getInt(attr, -1));
528                break;
529
530            case com.android.internal.R.styleable.TextView_minHeight:
531                setMinHeight(a.getDimensionPixelSize(attr, -1));
532                break;
533
534            case com.android.internal.R.styleable.TextView_maxEms:
535                setMaxEms(a.getInt(attr, -1));
536                break;
537
538            case com.android.internal.R.styleable.TextView_maxWidth:
539                setMaxWidth(a.getDimensionPixelSize(attr, -1));
540                break;
541
542            case com.android.internal.R.styleable.TextView_ems:
543                setEms(a.getInt(attr, -1));
544                break;
545
546            case com.android.internal.R.styleable.TextView_width:
547                setWidth(a.getDimensionPixelSize(attr, -1));
548                break;
549
550            case com.android.internal.R.styleable.TextView_minEms:
551                setMinEms(a.getInt(attr, -1));
552                break;
553
554            case com.android.internal.R.styleable.TextView_minWidth:
555                setMinWidth(a.getDimensionPixelSize(attr, -1));
556                break;
557
558            case com.android.internal.R.styleable.TextView_gravity:
559                setGravity(a.getInt(attr, -1));
560                break;
561
562            case com.android.internal.R.styleable.TextView_hint:
563                hint = a.getText(attr);
564                break;
565
566            case com.android.internal.R.styleable.TextView_text:
567                text = a.getText(attr);
568                break;
569
570            case com.android.internal.R.styleable.TextView_scrollHorizontally:
571                if (a.getBoolean(attr, false)) {
572                    setHorizontallyScrolling(true);
573                }
574                break;
575
576            case com.android.internal.R.styleable.TextView_singleLine:
577                singleLine = a.getBoolean(attr, singleLine);
578                break;
579
580            case com.android.internal.R.styleable.TextView_ellipsize:
581                ellipsize = a.getInt(attr, ellipsize);
582                break;
583
584            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
585                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
586                break;
587
588            case com.android.internal.R.styleable.TextView_includeFontPadding:
589                if (!a.getBoolean(attr, true)) {
590                    setIncludeFontPadding(false);
591                }
592                break;
593
594            case com.android.internal.R.styleable.TextView_cursorVisible:
595                if (!a.getBoolean(attr, true)) {
596                    setCursorVisible(false);
597                }
598                break;
599
600            case com.android.internal.R.styleable.TextView_maxLength:
601                maxlength = a.getInt(attr, -1);
602                break;
603
604            case com.android.internal.R.styleable.TextView_textScaleX:
605                setTextScaleX(a.getFloat(attr, 1.0f));
606                break;
607
608            case com.android.internal.R.styleable.TextView_freezesText:
609                mFreezesText = a.getBoolean(attr, false);
610                break;
611
612            case com.android.internal.R.styleable.TextView_shadowColor:
613                shadowcolor = a.getInt(attr, 0);
614                break;
615
616            case com.android.internal.R.styleable.TextView_shadowDx:
617                dx = a.getFloat(attr, 0);
618                break;
619
620            case com.android.internal.R.styleable.TextView_shadowDy:
621                dy = a.getFloat(attr, 0);
622                break;
623
624            case com.android.internal.R.styleable.TextView_shadowRadius:
625                r = a.getFloat(attr, 0);
626                break;
627
628            case com.android.internal.R.styleable.TextView_enabled:
629                setEnabled(a.getBoolean(attr, isEnabled()));
630                break;
631
632            case com.android.internal.R.styleable.TextView_textColorHighlight:
633                textColorHighlight = a.getColor(attr, textColorHighlight);
634                break;
635
636            case com.android.internal.R.styleable.TextView_textColor:
637                textColor = a.getColorStateList(attr);
638                break;
639
640            case com.android.internal.R.styleable.TextView_textColorHint:
641                textColorHint = a.getColorStateList(attr);
642                break;
643
644            case com.android.internal.R.styleable.TextView_textColorLink:
645                textColorLink = a.getColorStateList(attr);
646                break;
647
648            case com.android.internal.R.styleable.TextView_textSize:
649                textSize = a.getDimensionPixelSize(attr, textSize);
650                break;
651
652            case com.android.internal.R.styleable.TextView_typeface:
653                typefaceIndex = a.getInt(attr, typefaceIndex);
654                break;
655
656            case com.android.internal.R.styleable.TextView_textStyle:
657                styleIndex = a.getInt(attr, styleIndex);
658                break;
659
660            case com.android.internal.R.styleable.TextView_password:
661                password = a.getBoolean(attr, password);
662                break;
663
664            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
665                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
666                break;
667
668            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
669                mSpacingMult = a.getFloat(attr, mSpacingMult);
670                break;
671
672            case com.android.internal.R.styleable.TextView_inputType:
673                inputType = a.getInt(attr, mInputType);
674                break;
675
676            case com.android.internal.R.styleable.TextView_imeOptions:
677                if (mInputContentType == null) {
678                    mInputContentType = new InputContentType();
679                }
680                mInputContentType.imeOptions = a.getInt(attr,
681                        mInputContentType.imeOptions);
682                break;
683
684            case com.android.internal.R.styleable.TextView_imeActionLabel:
685                if (mInputContentType == null) {
686                    mInputContentType = new InputContentType();
687                }
688                mInputContentType.imeActionLabel = a.getText(attr);
689                break;
690
691            case com.android.internal.R.styleable.TextView_imeActionId:
692                if (mInputContentType == null) {
693                    mInputContentType = new InputContentType();
694                }
695                mInputContentType.imeActionId = a.getInt(attr,
696                        mInputContentType.imeActionId);
697                break;
698
699            case com.android.internal.R.styleable.TextView_privateImeOptions:
700                setPrivateImeOptions(a.getString(attr));
701                break;
702
703            case com.android.internal.R.styleable.TextView_editorExtras:
704                try {
705                    setInputExtras(a.getResourceId(attr, 0));
706                } catch (XmlPullParserException e) {
707                    Log.w(LOG_TAG, "Failure reading input extras", e);
708                } catch (IOException e) {
709                    Log.w(LOG_TAG, "Failure reading input extras", e);
710                }
711                break;
712
713            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
714                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
715                break;
716
717            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
718                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
719                break;
720
721            case com.android.internal.R.styleable.TextView_textSelectHandle:
722                mTextSelectHandleRes = a.getResourceId(attr, 0);
723                break;
724            }
725        }
726        a.recycle();
727
728        BufferType bufferType = BufferType.EDITABLE;
729
730        if ((inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
731                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
732            password = true;
733        }
734
735        if (inputMethod != null) {
736            Class<?> c;
737
738            try {
739                c = Class.forName(inputMethod.toString());
740            } catch (ClassNotFoundException ex) {
741                throw new RuntimeException(ex);
742            }
743
744            try {
745                mInput = (KeyListener) c.newInstance();
746            } catch (InstantiationException ex) {
747                throw new RuntimeException(ex);
748            } catch (IllegalAccessException ex) {
749                throw new RuntimeException(ex);
750            }
751            try {
752                mInputType = inputType != EditorInfo.TYPE_NULL
753                        ? inputType
754                        : mInput.getInputType();
755            } catch (IncompatibleClassChangeError e) {
756                mInputType = EditorInfo.TYPE_CLASS_TEXT;
757            }
758        } else if (digits != null) {
759            mInput = DigitsKeyListener.getInstance(digits.toString());
760            // If no input type was specified, we will default to generic
761            // text, since we can't tell the IME about the set of digits
762            // that was selected.
763            mInputType = inputType != EditorInfo.TYPE_NULL
764                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
765        } else if (inputType != EditorInfo.TYPE_NULL) {
766            setInputType(inputType, true);
767            singleLine = (inputType&(EditorInfo.TYPE_MASK_CLASS
768                            | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) !=
769                    (EditorInfo.TYPE_CLASS_TEXT
770                            | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
771        } else if (phone) {
772            mInput = DialerKeyListener.getInstance();
773            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
774        } else if (numeric != 0) {
775            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
776                                                   (numeric & DECIMAL) != 0);
777            inputType = EditorInfo.TYPE_CLASS_NUMBER;
778            if ((numeric & SIGNED) != 0) {
779                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
780            }
781            if ((numeric & DECIMAL) != 0) {
782                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
783            }
784            mInputType = inputType;
785        } else if (autotext || autocap != -1) {
786            TextKeyListener.Capitalize cap;
787
788            inputType = EditorInfo.TYPE_CLASS_TEXT;
789            if (!singleLine) {
790                inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
791            }
792
793            switch (autocap) {
794            case 1:
795                cap = TextKeyListener.Capitalize.SENTENCES;
796                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
797                break;
798
799            case 2:
800                cap = TextKeyListener.Capitalize.WORDS;
801                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
802                break;
803
804            case 3:
805                cap = TextKeyListener.Capitalize.CHARACTERS;
806                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
807                break;
808
809            default:
810                cap = TextKeyListener.Capitalize.NONE;
811                break;
812            }
813
814            mInput = TextKeyListener.getInstance(autotext, cap);
815            mInputType = inputType;
816        } else if (editable) {
817            mInput = TextKeyListener.getInstance();
818            mInputType = EditorInfo.TYPE_CLASS_TEXT;
819            if (!singleLine) {
820                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
821            }
822        } else {
823            mInput = null;
824
825            switch (buffertype) {
826                case 0:
827                    bufferType = BufferType.NORMAL;
828                    break;
829                case 1:
830                    bufferType = BufferType.SPANNABLE;
831                    break;
832                case 2:
833                    bufferType = BufferType.EDITABLE;
834                    break;
835            }
836        }
837
838        if (password && (mInputType&EditorInfo.TYPE_MASK_CLASS)
839                == EditorInfo.TYPE_CLASS_TEXT) {
840            mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
841                | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
842        }
843
844        if (selectallonfocus) {
845            mSelectAllOnFocus = true;
846
847            if (bufferType == BufferType.NORMAL)
848                bufferType = BufferType.SPANNABLE;
849        }
850
851        setCompoundDrawablesWithIntrinsicBounds(
852            drawableLeft, drawableTop, drawableRight, drawableBottom);
853        setCompoundDrawablePadding(drawablePadding);
854
855        if (singleLine) {
856            setSingleLine();
857
858            if (mInput == null && ellipsize < 0) {
859                ellipsize = 3; // END
860            }
861        }
862
863        switch (ellipsize) {
864            case 1:
865                setEllipsize(TextUtils.TruncateAt.START);
866                break;
867            case 2:
868                setEllipsize(TextUtils.TruncateAt.MIDDLE);
869                break;
870            case 3:
871                setEllipsize(TextUtils.TruncateAt.END);
872                break;
873            case 4:
874                setHorizontalFadingEdgeEnabled(true);
875                setEllipsize(TextUtils.TruncateAt.MARQUEE);
876                break;
877        }
878
879        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
880        setHintTextColor(textColorHint);
881        setLinkTextColor(textColorLink);
882        if (textColorHighlight != 0) {
883            setHighlightColor(textColorHighlight);
884        }
885        setRawTextSize(textSize);
886
887        if (password) {
888            setTransformationMethod(PasswordTransformationMethod.getInstance());
889            typefaceIndex = MONOSPACE;
890        } else if ((mInputType&(EditorInfo.TYPE_MASK_CLASS
891                |EditorInfo.TYPE_MASK_VARIATION))
892                == (EditorInfo.TYPE_CLASS_TEXT
893                        |EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
894            typefaceIndex = MONOSPACE;
895        }
896
897        setTypefaceByIndex(typefaceIndex, styleIndex);
898
899        if (shadowcolor != 0) {
900            setShadowLayer(r, dx, dy, shadowcolor);
901        }
902
903        if (maxlength >= 0) {
904            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
905        } else {
906            setFilters(NO_FILTERS);
907        }
908
909        setText(text, bufferType);
910        if (hint != null) setHint(hint);
911
912        /*
913         * Views are not normally focusable unless specified to be.
914         * However, TextViews that have input or movement methods *are*
915         * focusable by default.
916         */
917        a = context.obtainStyledAttributes(attrs,
918                                           com.android.internal.R.styleable.View,
919                                           defStyle, 0);
920
921        boolean focusable = mMovement != null || mInput != null;
922        boolean clickable = focusable;
923        boolean longClickable = focusable;
924
925        n = a.getIndexCount();
926        for (int i = 0; i < n; i++) {
927            int attr = a.getIndex(i);
928
929            switch (attr) {
930            case com.android.internal.R.styleable.View_focusable:
931                focusable = a.getBoolean(attr, focusable);
932                break;
933
934            case com.android.internal.R.styleable.View_clickable:
935                clickable = a.getBoolean(attr, clickable);
936                break;
937
938            case com.android.internal.R.styleable.View_longClickable:
939                longClickable = a.getBoolean(attr, longClickable);
940                break;
941            }
942        }
943        a.recycle();
944
945        setFocusable(focusable);
946        setClickable(clickable);
947        setLongClickable(longClickable);
948
949        prepareCursorControllers();
950    }
951
952    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
953        Typeface tf = null;
954        switch (typefaceIndex) {
955            case SANS:
956                tf = Typeface.SANS_SERIF;
957                break;
958
959            case SERIF:
960                tf = Typeface.SERIF;
961                break;
962
963            case MONOSPACE:
964                tf = Typeface.MONOSPACE;
965                break;
966        }
967
968        setTypeface(tf, styleIndex);
969    }
970
971    /**
972     * Sets the typeface and style in which the text should be displayed,
973     * and turns on the fake bold and italic bits in the Paint if the
974     * Typeface that you provided does not have all the bits in the
975     * style that you specified.
976     *
977     * @attr ref android.R.styleable#TextView_typeface
978     * @attr ref android.R.styleable#TextView_textStyle
979     */
980    public void setTypeface(Typeface tf, int style) {
981        if (style > 0) {
982            if (tf == null) {
983                tf = Typeface.defaultFromStyle(style);
984            } else {
985                tf = Typeface.create(tf, style);
986            }
987
988            setTypeface(tf);
989            // now compute what (if any) algorithmic styling is needed
990            int typefaceStyle = tf != null ? tf.getStyle() : 0;
991            int need = style & ~typefaceStyle;
992            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
993            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
994        } else {
995            mTextPaint.setFakeBoldText(false);
996            mTextPaint.setTextSkewX(0);
997            setTypeface(tf);
998        }
999    }
1000
1001    /**
1002     * Subclasses override this to specify that they have a KeyListener
1003     * by default even if not specifically called for in the XML options.
1004     */
1005    protected boolean getDefaultEditable() {
1006        return false;
1007    }
1008
1009    /**
1010     * Subclasses override this to specify a default movement method.
1011     */
1012    protected MovementMethod getDefaultMovementMethod() {
1013        return null;
1014    }
1015
1016    /**
1017     * Return the text the TextView is displaying. If setText() was called with
1018     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1019     * the return value from this method to Spannable or Editable, respectively.
1020     *
1021     * Note: The content of the return value should not be modified. If you want
1022     * a modifiable one, you should make your own copy first.
1023     */
1024    @ViewDebug.CapturedViewProperty
1025    public CharSequence getText() {
1026        return mText;
1027    }
1028
1029    /**
1030     * Returns the length, in characters, of the text managed by this TextView
1031     */
1032    public int length() {
1033        return mText.length();
1034    }
1035
1036    /**
1037     * Return the text the TextView is displaying as an Editable object.  If
1038     * the text is not editable, null is returned.
1039     *
1040     * @see #getText
1041     */
1042    public Editable getEditableText() {
1043        return (mText instanceof Editable) ? (Editable)mText : null;
1044    }
1045
1046    /**
1047     * @return the height of one standard line in pixels.  Note that markup
1048     * within the text can cause individual lines to be taller or shorter
1049     * than this height, and the layout may contain additional first-
1050     * or last-line padding.
1051     */
1052    public int getLineHeight() {
1053        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult
1054                          + mSpacingAdd);
1055    }
1056
1057    /**
1058     * @return the Layout that is currently being used to display the text.
1059     * This can be null if the text or width has recently changes.
1060     */
1061    public final Layout getLayout() {
1062        return mLayout;
1063    }
1064
1065    /**
1066     * @return the current key listener for this TextView.
1067     * This will frequently be null for non-EditText TextViews.
1068     */
1069    public final KeyListener getKeyListener() {
1070        return mInput;
1071    }
1072
1073    /**
1074     * Sets the key listener to be used with this TextView.  This can be null
1075     * to disallow user input.  Note that this method has significant and
1076     * subtle interactions with soft keyboards and other input method:
1077     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1078     * for important details.  Calling this method will replace the current
1079     * content type of the text view with the content type returned by the
1080     * key listener.
1081     * <p>
1082     * Be warned that if you want a TextView with a key listener or movement
1083     * method not to be focusable, or if you want a TextView without a
1084     * key listener or movement method to be focusable, you must call
1085     * {@link #setFocusable} again after calling this to get the focusability
1086     * back the way you want it.
1087     *
1088     * @attr ref android.R.styleable#TextView_numeric
1089     * @attr ref android.R.styleable#TextView_digits
1090     * @attr ref android.R.styleable#TextView_phoneNumber
1091     * @attr ref android.R.styleable#TextView_inputMethod
1092     * @attr ref android.R.styleable#TextView_capitalize
1093     * @attr ref android.R.styleable#TextView_autoText
1094     */
1095    public void setKeyListener(KeyListener input) {
1096        setKeyListenerOnly(input);
1097        fixFocusableAndClickableSettings();
1098
1099        if (input != null) {
1100            try {
1101                mInputType = mInput.getInputType();
1102            } catch (IncompatibleClassChangeError e) {
1103                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1104            }
1105            if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
1106                    == EditorInfo.TYPE_CLASS_TEXT) {
1107                if (mSingleLine) {
1108                    mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
1109                } else {
1110                    mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
1111                }
1112            }
1113        } else {
1114            mInputType = EditorInfo.TYPE_NULL;
1115        }
1116
1117        InputMethodManager imm = InputMethodManager.peekInstance();
1118        if (imm != null) imm.restartInput(this);
1119    }
1120
1121    private void setKeyListenerOnly(KeyListener input) {
1122        mInput = input;
1123        if (mInput != null && !(mText instanceof Editable))
1124            setText(mText);
1125
1126        setFilters((Editable) mText, mFilters);
1127    }
1128
1129    /**
1130     * @return the movement method being used for this TextView.
1131     * This will frequently be null for non-EditText TextViews.
1132     */
1133    public final MovementMethod getMovementMethod() {
1134        return mMovement;
1135    }
1136
1137    /**
1138     * Sets the movement method (arrow key handler) to be used for
1139     * this TextView.  This can be null to disallow using the arrow keys
1140     * to move the cursor or scroll the view.
1141     * <p>
1142     * Be warned that if you want a TextView with a key listener or movement
1143     * method not to be focusable, or if you want a TextView without a
1144     * key listener or movement method to be focusable, you must call
1145     * {@link #setFocusable} again after calling this to get the focusability
1146     * back the way you want it.
1147     */
1148    public final void setMovementMethod(MovementMethod movement) {
1149        mMovement = movement;
1150
1151        if (mMovement != null && !(mText instanceof Spannable))
1152            setText(mText);
1153
1154        fixFocusableAndClickableSettings();
1155
1156        // SelectionModifierCursorController depends on canSelectText, which depends on mMovement
1157        prepareCursorControllers();
1158    }
1159
1160    private void fixFocusableAndClickableSettings() {
1161        if ((mMovement != null) || mInput != null) {
1162            setFocusable(true);
1163            setClickable(true);
1164            setLongClickable(true);
1165        } else {
1166            setFocusable(false);
1167            setClickable(false);
1168            setLongClickable(false);
1169        }
1170    }
1171
1172    /**
1173     * @return the current transformation method for this TextView.
1174     * This will frequently be null except for single-line and password
1175     * fields.
1176     */
1177    public final TransformationMethod getTransformationMethod() {
1178        return mTransformation;
1179    }
1180
1181    /**
1182     * Sets the transformation that is applied to the text that this
1183     * TextView is displaying.
1184     *
1185     * @attr ref android.R.styleable#TextView_password
1186     * @attr ref android.R.styleable#TextView_singleLine
1187     */
1188    public final void setTransformationMethod(TransformationMethod method) {
1189        if (method == mTransformation) {
1190            // Avoid the setText() below if the transformation is
1191            // the same.
1192            return;
1193        }
1194        if (mTransformation != null) {
1195            if (mText instanceof Spannable) {
1196                ((Spannable) mText).removeSpan(mTransformation);
1197            }
1198        }
1199
1200        mTransformation = method;
1201
1202        setText(mText);
1203    }
1204
1205    /**
1206     * Returns the top padding of the view, plus space for the top
1207     * Drawable if any.
1208     */
1209    public int getCompoundPaddingTop() {
1210        final Drawables dr = mDrawables;
1211        if (dr == null || dr.mDrawableTop == null) {
1212            return mPaddingTop;
1213        } else {
1214            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1215        }
1216    }
1217
1218    /**
1219     * Returns the bottom padding of the view, plus space for the bottom
1220     * Drawable if any.
1221     */
1222    public int getCompoundPaddingBottom() {
1223        final Drawables dr = mDrawables;
1224        if (dr == null || dr.mDrawableBottom == null) {
1225            return mPaddingBottom;
1226        } else {
1227            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1228        }
1229    }
1230
1231    /**
1232     * Returns the left padding of the view, plus space for the left
1233     * Drawable if any.
1234     */
1235    public int getCompoundPaddingLeft() {
1236        final Drawables dr = mDrawables;
1237        if (dr == null || dr.mDrawableLeft == null) {
1238            return mPaddingLeft;
1239        } else {
1240            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1241        }
1242    }
1243
1244    /**
1245     * Returns the right padding of the view, plus space for the right
1246     * Drawable if any.
1247     */
1248    public int getCompoundPaddingRight() {
1249        final Drawables dr = mDrawables;
1250        if (dr == null || dr.mDrawableRight == null) {
1251            return mPaddingRight;
1252        } else {
1253            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1254        }
1255    }
1256
1257    /**
1258     * Returns the extended top padding of the view, including both the
1259     * top Drawable if any and any extra space to keep more than maxLines
1260     * of text from showing.  It is only valid to call this after measuring.
1261     */
1262    public int getExtendedPaddingTop() {
1263        if (mMaxMode != LINES) {
1264            return getCompoundPaddingTop();
1265        }
1266
1267        if (mLayout.getLineCount() <= mMaximum) {
1268            return getCompoundPaddingTop();
1269        }
1270
1271        int top = getCompoundPaddingTop();
1272        int bottom = getCompoundPaddingBottom();
1273        int viewht = getHeight() - top - bottom;
1274        int layoutht = mLayout.getLineTop(mMaximum);
1275
1276        if (layoutht >= viewht) {
1277            return top;
1278        }
1279
1280        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1281        if (gravity == Gravity.TOP) {
1282            return top;
1283        } else if (gravity == Gravity.BOTTOM) {
1284            return top + viewht - layoutht;
1285        } else { // (gravity == Gravity.CENTER_VERTICAL)
1286            return top + (viewht - layoutht) / 2;
1287        }
1288    }
1289
1290    /**
1291     * Returns the extended bottom padding of the view, including both the
1292     * bottom Drawable if any and any extra space to keep more than maxLines
1293     * of text from showing.  It is only valid to call this after measuring.
1294     */
1295    public int getExtendedPaddingBottom() {
1296        if (mMaxMode != LINES) {
1297            return getCompoundPaddingBottom();
1298        }
1299
1300        if (mLayout.getLineCount() <= mMaximum) {
1301            return getCompoundPaddingBottom();
1302        }
1303
1304        int top = getCompoundPaddingTop();
1305        int bottom = getCompoundPaddingBottom();
1306        int viewht = getHeight() - top - bottom;
1307        int layoutht = mLayout.getLineTop(mMaximum);
1308
1309        if (layoutht >= viewht) {
1310            return bottom;
1311        }
1312
1313        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1314        if (gravity == Gravity.TOP) {
1315            return bottom + viewht - layoutht;
1316        } else if (gravity == Gravity.BOTTOM) {
1317            return bottom;
1318        } else { // (gravity == Gravity.CENTER_VERTICAL)
1319            return bottom + (viewht - layoutht) / 2;
1320        }
1321    }
1322
1323    /**
1324     * Returns the total left padding of the view, including the left
1325     * Drawable if any.
1326     */
1327    public int getTotalPaddingLeft() {
1328        return getCompoundPaddingLeft();
1329    }
1330
1331    /**
1332     * Returns the total right padding of the view, including the right
1333     * Drawable if any.
1334     */
1335    public int getTotalPaddingRight() {
1336        return getCompoundPaddingRight();
1337    }
1338
1339    /**
1340     * Returns the total top padding of the view, including the top
1341     * Drawable if any, the extra space to keep more than maxLines
1342     * from showing, and the vertical offset for gravity, if any.
1343     */
1344    public int getTotalPaddingTop() {
1345        return getExtendedPaddingTop() + getVerticalOffset(true);
1346    }
1347
1348    /**
1349     * Returns the total bottom padding of the view, including the bottom
1350     * Drawable if any, the extra space to keep more than maxLines
1351     * from showing, and the vertical offset for gravity, if any.
1352     */
1353    public int getTotalPaddingBottom() {
1354        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1355    }
1356
1357    /**
1358     * Sets the Drawables (if any) to appear to the left of, above,
1359     * to the right of, and below the text.  Use null if you do not
1360     * want a Drawable there.  The Drawables must already have had
1361     * {@link Drawable#setBounds} called.
1362     *
1363     * @attr ref android.R.styleable#TextView_drawableLeft
1364     * @attr ref android.R.styleable#TextView_drawableTop
1365     * @attr ref android.R.styleable#TextView_drawableRight
1366     * @attr ref android.R.styleable#TextView_drawableBottom
1367     */
1368    public void setCompoundDrawables(Drawable left, Drawable top,
1369                                     Drawable right, Drawable bottom) {
1370        Drawables dr = mDrawables;
1371
1372        final boolean drawables = left != null || top != null
1373                || right != null || bottom != null;
1374
1375        if (!drawables) {
1376            // Clearing drawables...  can we free the data structure?
1377            if (dr != null) {
1378                if (dr.mDrawablePadding == 0) {
1379                    mDrawables = null;
1380                } else {
1381                    // We need to retain the last set padding, so just clear
1382                    // out all of the fields in the existing structure.
1383                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1384                    dr.mDrawableLeft = null;
1385                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1386                    dr.mDrawableTop = null;
1387                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1388                    dr.mDrawableRight = null;
1389                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1390                    dr.mDrawableBottom = null;
1391                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1392                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1393                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1394                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1395                }
1396            }
1397        } else {
1398            if (dr == null) {
1399                mDrawables = dr = new Drawables();
1400            }
1401
1402            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1403                dr.mDrawableLeft.setCallback(null);
1404            }
1405            dr.mDrawableLeft = left;
1406
1407            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1408                dr.mDrawableTop.setCallback(null);
1409            }
1410            dr.mDrawableTop = top;
1411
1412            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1413                dr.mDrawableRight.setCallback(null);
1414            }
1415            dr.mDrawableRight = right;
1416
1417            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1418                dr.mDrawableBottom.setCallback(null);
1419            }
1420            dr.mDrawableBottom = bottom;
1421
1422            final Rect compoundRect = dr.mCompoundRect;
1423            int[] state;
1424
1425            state = getDrawableState();
1426
1427            if (left != null) {
1428                left.setState(state);
1429                left.copyBounds(compoundRect);
1430                left.setCallback(this);
1431                dr.mDrawableSizeLeft = compoundRect.width();
1432                dr.mDrawableHeightLeft = compoundRect.height();
1433            } else {
1434                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1435            }
1436
1437            if (right != null) {
1438                right.setState(state);
1439                right.copyBounds(compoundRect);
1440                right.setCallback(this);
1441                dr.mDrawableSizeRight = compoundRect.width();
1442                dr.mDrawableHeightRight = compoundRect.height();
1443            } else {
1444                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1445            }
1446
1447            if (top != null) {
1448                top.setState(state);
1449                top.copyBounds(compoundRect);
1450                top.setCallback(this);
1451                dr.mDrawableSizeTop = compoundRect.height();
1452                dr.mDrawableWidthTop = compoundRect.width();
1453            } else {
1454                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1455            }
1456
1457            if (bottom != null) {
1458                bottom.setState(state);
1459                bottom.copyBounds(compoundRect);
1460                bottom.setCallback(this);
1461                dr.mDrawableSizeBottom = compoundRect.height();
1462                dr.mDrawableWidthBottom = compoundRect.width();
1463            } else {
1464                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1465            }
1466        }
1467
1468        invalidate();
1469        requestLayout();
1470    }
1471
1472    /**
1473     * Sets the Drawables (if any) to appear to the left of, above,
1474     * to the right of, and below the text.  Use 0 if you do not
1475     * want a Drawable there. The Drawables' bounds will be set to
1476     * their intrinsic bounds.
1477     *
1478     * @param left Resource identifier of the left Drawable.
1479     * @param top Resource identifier of the top Drawable.
1480     * @param right Resource identifier of the right Drawable.
1481     * @param bottom Resource identifier of the bottom Drawable.
1482     *
1483     * @attr ref android.R.styleable#TextView_drawableLeft
1484     * @attr ref android.R.styleable#TextView_drawableTop
1485     * @attr ref android.R.styleable#TextView_drawableRight
1486     * @attr ref android.R.styleable#TextView_drawableBottom
1487     */
1488    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1489        final Resources resources = getContext().getResources();
1490        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1491                top != 0 ? resources.getDrawable(top) : null,
1492                right != 0 ? resources.getDrawable(right) : null,
1493                bottom != 0 ? resources.getDrawable(bottom) : null);
1494    }
1495
1496    /**
1497     * Sets the Drawables (if any) to appear to the left of, above,
1498     * to the right of, and below the text.  Use null if you do not
1499     * want a Drawable there. The Drawables' bounds will be set to
1500     * their intrinsic bounds.
1501     *
1502     * @attr ref android.R.styleable#TextView_drawableLeft
1503     * @attr ref android.R.styleable#TextView_drawableTop
1504     * @attr ref android.R.styleable#TextView_drawableRight
1505     * @attr ref android.R.styleable#TextView_drawableBottom
1506     */
1507    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1508            Drawable right, Drawable bottom) {
1509
1510        if (left != null) {
1511            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1512        }
1513        if (right != null) {
1514            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1515        }
1516        if (top != null) {
1517            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1518        }
1519        if (bottom != null) {
1520            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1521        }
1522        setCompoundDrawables(left, top, right, bottom);
1523    }
1524
1525    /**
1526     * Returns drawables for the left, top, right, and bottom borders.
1527     */
1528    public Drawable[] getCompoundDrawables() {
1529        final Drawables dr = mDrawables;
1530        if (dr != null) {
1531            return new Drawable[] {
1532                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1533            };
1534        } else {
1535            return new Drawable[] { null, null, null, null };
1536        }
1537    }
1538
1539    /**
1540     * Sets the size of the padding between the compound drawables and
1541     * the text.
1542     *
1543     * @attr ref android.R.styleable#TextView_drawablePadding
1544     */
1545    public void setCompoundDrawablePadding(int pad) {
1546        Drawables dr = mDrawables;
1547        if (pad == 0) {
1548            if (dr != null) {
1549                dr.mDrawablePadding = pad;
1550            }
1551        } else {
1552            if (dr == null) {
1553                mDrawables = dr = new Drawables();
1554            }
1555            dr.mDrawablePadding = pad;
1556        }
1557
1558        invalidate();
1559        requestLayout();
1560    }
1561
1562    /**
1563     * Returns the padding between the compound drawables and the text.
1564     */
1565    public int getCompoundDrawablePadding() {
1566        final Drawables dr = mDrawables;
1567        return dr != null ? dr.mDrawablePadding : 0;
1568    }
1569
1570    @Override
1571    public void setPadding(int left, int top, int right, int bottom) {
1572        if (left != mPaddingLeft ||
1573            right != mPaddingRight ||
1574            top != mPaddingTop ||
1575            bottom != mPaddingBottom) {
1576            nullLayouts();
1577        }
1578
1579        // the super call will requestLayout()
1580        super.setPadding(left, top, right, bottom);
1581        invalidate();
1582    }
1583
1584    /**
1585     * Gets the autolink mask of the text.  See {@link
1586     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1587     * possible values.
1588     *
1589     * @attr ref android.R.styleable#TextView_autoLink
1590     */
1591    public final int getAutoLinkMask() {
1592        return mAutoLinkMask;
1593    }
1594
1595    /**
1596     * Sets the text color, size, style, hint color, and highlight color
1597     * from the specified TextAppearance resource.
1598     */
1599    public void setTextAppearance(Context context, int resid) {
1600        TypedArray appearance =
1601            context.obtainStyledAttributes(resid,
1602                                           com.android.internal.R.styleable.TextAppearance);
1603
1604        int color;
1605        ColorStateList colors;
1606        int ts;
1607
1608        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1609        if (color != 0) {
1610            setHighlightColor(color);
1611        }
1612
1613        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1614                                              TextAppearance_textColor);
1615        if (colors != null) {
1616            setTextColor(colors);
1617        }
1618
1619        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1620                                              TextAppearance_textSize, 0);
1621        if (ts != 0) {
1622            setRawTextSize(ts);
1623        }
1624
1625        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1626                                              TextAppearance_textColorHint);
1627        if (colors != null) {
1628            setHintTextColor(colors);
1629        }
1630
1631        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1632                                              TextAppearance_textColorLink);
1633        if (colors != null) {
1634            setLinkTextColor(colors);
1635        }
1636
1637        int typefaceIndex, styleIndex;
1638
1639        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1640                                          TextAppearance_typeface, -1);
1641        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1642                                       TextAppearance_textStyle, -1);
1643
1644        setTypefaceByIndex(typefaceIndex, styleIndex);
1645        appearance.recycle();
1646    }
1647
1648    /**
1649     * @return the size (in pixels) of the default text size in this TextView.
1650     */
1651    public float getTextSize() {
1652        return mTextPaint.getTextSize();
1653    }
1654
1655    /**
1656     * Set the default text size to the given value, interpreted as "scaled
1657     * pixel" units.  This size is adjusted based on the current density and
1658     * user font size preference.
1659     *
1660     * @param size The scaled pixel size.
1661     *
1662     * @attr ref android.R.styleable#TextView_textSize
1663     */
1664    @android.view.RemotableViewMethod
1665    public void setTextSize(float size) {
1666        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1667    }
1668
1669    /**
1670     * Set the default text size to a given unit and value.  See {@link
1671     * TypedValue} for the possible dimension units.
1672     *
1673     * @param unit The desired dimension unit.
1674     * @param size The desired size in the given units.
1675     *
1676     * @attr ref android.R.styleable#TextView_textSize
1677     */
1678    public void setTextSize(int unit, float size) {
1679        Context c = getContext();
1680        Resources r;
1681
1682        if (c == null)
1683            r = Resources.getSystem();
1684        else
1685            r = c.getResources();
1686
1687        setRawTextSize(TypedValue.applyDimension(
1688            unit, size, r.getDisplayMetrics()));
1689    }
1690
1691    private void setRawTextSize(float size) {
1692        if (size != mTextPaint.getTextSize()) {
1693            mTextPaint.setTextSize(size);
1694
1695            if (mLayout != null) {
1696                nullLayouts();
1697                requestLayout();
1698                invalidate();
1699            }
1700        }
1701    }
1702
1703    /**
1704     * @return the extent by which text is currently being stretched
1705     * horizontally.  This will usually be 1.
1706     */
1707    public float getTextScaleX() {
1708        return mTextPaint.getTextScaleX();
1709    }
1710
1711    /**
1712     * Sets the extent by which text should be stretched horizontally.
1713     *
1714     * @attr ref android.R.styleable#TextView_textScaleX
1715     */
1716    @android.view.RemotableViewMethod
1717    public void setTextScaleX(float size) {
1718        if (size != mTextPaint.getTextScaleX()) {
1719            mUserSetTextScaleX = true;
1720            mTextPaint.setTextScaleX(size);
1721
1722            if (mLayout != null) {
1723                nullLayouts();
1724                requestLayout();
1725                invalidate();
1726            }
1727        }
1728    }
1729
1730    /**
1731     * Sets the typeface and style in which the text should be displayed.
1732     * Note that not all Typeface families actually have bold and italic
1733     * variants, so you may need to use
1734     * {@link #setTypeface(Typeface, int)} to get the appearance
1735     * that you actually want.
1736     *
1737     * @attr ref android.R.styleable#TextView_typeface
1738     * @attr ref android.R.styleable#TextView_textStyle
1739     */
1740    public void setTypeface(Typeface tf) {
1741        if (mTextPaint.getTypeface() != tf) {
1742            mTextPaint.setTypeface(tf);
1743
1744            if (mLayout != null) {
1745                nullLayouts();
1746                requestLayout();
1747                invalidate();
1748            }
1749        }
1750    }
1751
1752    /**
1753     * @return the current typeface and style in which the text is being
1754     * displayed.
1755     */
1756    public Typeface getTypeface() {
1757        return mTextPaint.getTypeface();
1758    }
1759
1760    /**
1761     * Sets the text color for all the states (normal, selected,
1762     * focused) to be this color.
1763     *
1764     * @attr ref android.R.styleable#TextView_textColor
1765     */
1766    @android.view.RemotableViewMethod
1767    public void setTextColor(int color) {
1768        mTextColor = ColorStateList.valueOf(color);
1769        updateTextColors();
1770    }
1771
1772    /**
1773     * Sets the text color.
1774     *
1775     * @attr ref android.R.styleable#TextView_textColor
1776     */
1777    public void setTextColor(ColorStateList colors) {
1778        if (colors == null) {
1779            throw new NullPointerException();
1780        }
1781
1782        mTextColor = colors;
1783        updateTextColors();
1784    }
1785
1786    /**
1787     * Return the set of text colors.
1788     *
1789     * @return Returns the set of text colors.
1790     */
1791    public final ColorStateList getTextColors() {
1792        return mTextColor;
1793    }
1794
1795    /**
1796     * <p>Return the current color selected for normal text.</p>
1797     *
1798     * @return Returns the current text color.
1799     */
1800    public final int getCurrentTextColor() {
1801        return mCurTextColor;
1802    }
1803
1804    /**
1805     * Sets the color used to display the selection highlight.
1806     *
1807     * @attr ref android.R.styleable#TextView_textColorHighlight
1808     */
1809    @android.view.RemotableViewMethod
1810    public void setHighlightColor(int color) {
1811        if (mHighlightColor != color) {
1812            mHighlightColor = color;
1813            invalidate();
1814        }
1815    }
1816
1817    /**
1818     * Gives the text a shadow of the specified radius and color, the specified
1819     * distance from its normal position.
1820     *
1821     * @attr ref android.R.styleable#TextView_shadowColor
1822     * @attr ref android.R.styleable#TextView_shadowDx
1823     * @attr ref android.R.styleable#TextView_shadowDy
1824     * @attr ref android.R.styleable#TextView_shadowRadius
1825     */
1826    public void setShadowLayer(float radius, float dx, float dy, int color) {
1827        mTextPaint.setShadowLayer(radius, dx, dy, color);
1828
1829        mShadowRadius = radius;
1830        mShadowDx = dx;
1831        mShadowDy = dy;
1832
1833        invalidate();
1834    }
1835
1836    /**
1837     * @return the base paint used for the text.  Please use this only to
1838     * consult the Paint's properties and not to change them.
1839     */
1840    public TextPaint getPaint() {
1841        return mTextPaint;
1842    }
1843
1844    /**
1845     * Sets the autolink mask of the text.  See {@link
1846     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1847     * possible values.
1848     *
1849     * @attr ref android.R.styleable#TextView_autoLink
1850     */
1851    @android.view.RemotableViewMethod
1852    public final void setAutoLinkMask(int mask) {
1853        mAutoLinkMask = mask;
1854    }
1855
1856    /**
1857     * Sets whether the movement method will automatically be set to
1858     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1859     * set to nonzero and links are detected in {@link #setText}.
1860     * The default is true.
1861     *
1862     * @attr ref android.R.styleable#TextView_linksClickable
1863     */
1864    @android.view.RemotableViewMethod
1865    public final void setLinksClickable(boolean whether) {
1866        mLinksClickable = whether;
1867    }
1868
1869    /**
1870     * Returns whether the movement method will automatically be set to
1871     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1872     * set to nonzero and links are detected in {@link #setText}.
1873     * The default is true.
1874     *
1875     * @attr ref android.R.styleable#TextView_linksClickable
1876     */
1877    public final boolean getLinksClickable() {
1878        return mLinksClickable;
1879    }
1880
1881    /**
1882     * Returns the list of URLSpans attached to the text
1883     * (by {@link Linkify} or otherwise) if any.  You can call
1884     * {@link URLSpan#getURL} on them to find where they link to
1885     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1886     * to find the region of the text they are attached to.
1887     */
1888    public URLSpan[] getUrls() {
1889        if (mText instanceof Spanned) {
1890            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1891        } else {
1892            return new URLSpan[0];
1893        }
1894    }
1895
1896    /**
1897     * Sets the color of the hint text.
1898     *
1899     * @attr ref android.R.styleable#TextView_textColorHint
1900     */
1901    @android.view.RemotableViewMethod
1902    public final void setHintTextColor(int color) {
1903        mHintTextColor = ColorStateList.valueOf(color);
1904        updateTextColors();
1905    }
1906
1907    /**
1908     * Sets the color of the hint text.
1909     *
1910     * @attr ref android.R.styleable#TextView_textColorHint
1911     */
1912    public final void setHintTextColor(ColorStateList colors) {
1913        mHintTextColor = colors;
1914        updateTextColors();
1915    }
1916
1917    /**
1918     * <p>Return the color used to paint the hint text.</p>
1919     *
1920     * @return Returns the list of hint text colors.
1921     */
1922    public final ColorStateList getHintTextColors() {
1923        return mHintTextColor;
1924    }
1925
1926    /**
1927     * <p>Return the current color selected to paint the hint text.</p>
1928     *
1929     * @return Returns the current hint text color.
1930     */
1931    public final int getCurrentHintTextColor() {
1932        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
1933    }
1934
1935    /**
1936     * Sets the color of links in the text.
1937     *
1938     * @attr ref android.R.styleable#TextView_textColorLink
1939     */
1940    @android.view.RemotableViewMethod
1941    public final void setLinkTextColor(int color) {
1942        mLinkTextColor = ColorStateList.valueOf(color);
1943        updateTextColors();
1944    }
1945
1946    /**
1947     * Sets the color of links in the text.
1948     *
1949     * @attr ref android.R.styleable#TextView_textColorLink
1950     */
1951    public final void setLinkTextColor(ColorStateList colors) {
1952        mLinkTextColor = colors;
1953        updateTextColors();
1954    }
1955
1956    /**
1957     * <p>Returns the color used to paint links in the text.</p>
1958     *
1959     * @return Returns the list of link text colors.
1960     */
1961    public final ColorStateList getLinkTextColors() {
1962        return mLinkTextColor;
1963    }
1964
1965    /**
1966     * Sets the horizontal alignment of the text and the
1967     * vertical gravity that will be used when there is extra space
1968     * in the TextView beyond what is required for the text itself.
1969     *
1970     * @see android.view.Gravity
1971     * @attr ref android.R.styleable#TextView_gravity
1972     */
1973    public void setGravity(int gravity) {
1974        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
1975            gravity |= Gravity.LEFT;
1976        }
1977        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
1978            gravity |= Gravity.TOP;
1979        }
1980
1981        boolean newLayout = false;
1982
1983        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
1984            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
1985            newLayout = true;
1986        }
1987
1988        if (gravity != mGravity) {
1989            invalidate();
1990        }
1991
1992        mGravity = gravity;
1993
1994        if (mLayout != null && newLayout) {
1995            // XXX this is heavy-handed because no actual content changes.
1996            int want = mLayout.getWidth();
1997            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
1998
1999            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2000                          mRight - mLeft - getCompoundPaddingLeft() -
2001                          getCompoundPaddingRight(), true);
2002        }
2003    }
2004
2005    /**
2006     * Returns the horizontal and vertical alignment of this TextView.
2007     *
2008     * @see android.view.Gravity
2009     * @attr ref android.R.styleable#TextView_gravity
2010     */
2011    public int getGravity() {
2012        return mGravity;
2013    }
2014
2015    /**
2016     * @return the flags on the Paint being used to display the text.
2017     * @see Paint#getFlags
2018     */
2019    public int getPaintFlags() {
2020        return mTextPaint.getFlags();
2021    }
2022
2023    /**
2024     * Sets flags on the Paint being used to display the text and
2025     * reflows the text if they are different from the old flags.
2026     * @see Paint#setFlags
2027     */
2028    @android.view.RemotableViewMethod
2029    public void setPaintFlags(int flags) {
2030        if (mTextPaint.getFlags() != flags) {
2031            mTextPaint.setFlags(flags);
2032
2033            if (mLayout != null) {
2034                nullLayouts();
2035                requestLayout();
2036                invalidate();
2037            }
2038        }
2039    }
2040
2041    /**
2042     * Sets whether the text should be allowed to be wider than the
2043     * View is.  If false, it will be wrapped to the width of the View.
2044     *
2045     * @attr ref android.R.styleable#TextView_scrollHorizontally
2046     */
2047    public void setHorizontallyScrolling(boolean whether) {
2048        mHorizontallyScrolling = whether;
2049
2050        if (mLayout != null) {
2051            nullLayouts();
2052            requestLayout();
2053            invalidate();
2054        }
2055    }
2056
2057    /**
2058     * Makes the TextView at least this many lines tall
2059     *
2060     * @attr ref android.R.styleable#TextView_minLines
2061     */
2062    @android.view.RemotableViewMethod
2063    public void setMinLines(int minlines) {
2064        mMinimum = minlines;
2065        mMinMode = LINES;
2066
2067        requestLayout();
2068        invalidate();
2069    }
2070
2071    /**
2072     * Makes the TextView at least this many pixels tall
2073     *
2074     * @attr ref android.R.styleable#TextView_minHeight
2075     */
2076    @android.view.RemotableViewMethod
2077    public void setMinHeight(int minHeight) {
2078        mMinimum = minHeight;
2079        mMinMode = PIXELS;
2080
2081        requestLayout();
2082        invalidate();
2083    }
2084
2085    /**
2086     * Makes the TextView at most this many lines tall
2087     *
2088     * @attr ref android.R.styleable#TextView_maxLines
2089     */
2090    @android.view.RemotableViewMethod
2091    public void setMaxLines(int maxlines) {
2092        mMaximum = maxlines;
2093        mMaxMode = LINES;
2094
2095        requestLayout();
2096        invalidate();
2097    }
2098
2099    /**
2100     * Makes the TextView at most this many pixels tall
2101     *
2102     * @attr ref android.R.styleable#TextView_maxHeight
2103     */
2104    @android.view.RemotableViewMethod
2105    public void setMaxHeight(int maxHeight) {
2106        mMaximum = maxHeight;
2107        mMaxMode = PIXELS;
2108
2109        requestLayout();
2110        invalidate();
2111    }
2112
2113    /**
2114     * Makes the TextView exactly this many lines tall
2115     *
2116     * @attr ref android.R.styleable#TextView_lines
2117     */
2118    @android.view.RemotableViewMethod
2119    public void setLines(int lines) {
2120        mMaximum = mMinimum = lines;
2121        mMaxMode = mMinMode = LINES;
2122
2123        requestLayout();
2124        invalidate();
2125    }
2126
2127    /**
2128     * Makes the TextView exactly this many pixels tall.
2129     * You could do the same thing by specifying this number in the
2130     * LayoutParams.
2131     *
2132     * @attr ref android.R.styleable#TextView_height
2133     */
2134    @android.view.RemotableViewMethod
2135    public void setHeight(int pixels) {
2136        mMaximum = mMinimum = pixels;
2137        mMaxMode = mMinMode = PIXELS;
2138
2139        requestLayout();
2140        invalidate();
2141    }
2142
2143    /**
2144     * Makes the TextView at least this many ems wide
2145     *
2146     * @attr ref android.R.styleable#TextView_minEms
2147     */
2148    @android.view.RemotableViewMethod
2149    public void setMinEms(int minems) {
2150        mMinWidth = minems;
2151        mMinWidthMode = EMS;
2152
2153        requestLayout();
2154        invalidate();
2155    }
2156
2157    /**
2158     * Makes the TextView at least this many pixels wide
2159     *
2160     * @attr ref android.R.styleable#TextView_minWidth
2161     */
2162    @android.view.RemotableViewMethod
2163    public void setMinWidth(int minpixels) {
2164        mMinWidth = minpixels;
2165        mMinWidthMode = PIXELS;
2166
2167        requestLayout();
2168        invalidate();
2169    }
2170
2171    /**
2172     * Makes the TextView at most this many ems wide
2173     *
2174     * @attr ref android.R.styleable#TextView_maxEms
2175     */
2176    @android.view.RemotableViewMethod
2177    public void setMaxEms(int maxems) {
2178        mMaxWidth = maxems;
2179        mMaxWidthMode = EMS;
2180
2181        requestLayout();
2182        invalidate();
2183    }
2184
2185    /**
2186     * Makes the TextView at most this many pixels wide
2187     *
2188     * @attr ref android.R.styleable#TextView_maxWidth
2189     */
2190    @android.view.RemotableViewMethod
2191    public void setMaxWidth(int maxpixels) {
2192        mMaxWidth = maxpixels;
2193        mMaxWidthMode = PIXELS;
2194
2195        requestLayout();
2196        invalidate();
2197    }
2198
2199    /**
2200     * Makes the TextView exactly this many ems wide
2201     *
2202     * @attr ref android.R.styleable#TextView_ems
2203     */
2204    @android.view.RemotableViewMethod
2205    public void setEms(int ems) {
2206        mMaxWidth = mMinWidth = ems;
2207        mMaxWidthMode = mMinWidthMode = EMS;
2208
2209        requestLayout();
2210        invalidate();
2211    }
2212
2213    /**
2214     * Makes the TextView exactly this many pixels wide.
2215     * You could do the same thing by specifying this number in the
2216     * LayoutParams.
2217     *
2218     * @attr ref android.R.styleable#TextView_width
2219     */
2220    @android.view.RemotableViewMethod
2221    public void setWidth(int pixels) {
2222        mMaxWidth = mMinWidth = pixels;
2223        mMaxWidthMode = mMinWidthMode = PIXELS;
2224
2225        requestLayout();
2226        invalidate();
2227    }
2228
2229
2230    /**
2231     * Sets line spacing for this TextView.  Each line will have its height
2232     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2233     *
2234     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2235     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2236     */
2237    public void setLineSpacing(float add, float mult) {
2238        mSpacingMult = mult;
2239        mSpacingAdd = add;
2240
2241        if (mLayout != null) {
2242            nullLayouts();
2243            requestLayout();
2244            invalidate();
2245        }
2246    }
2247
2248    /**
2249     * Convenience method: Append the specified text to the TextView's
2250     * display buffer, upgrading it to BufferType.EDITABLE if it was
2251     * not already editable.
2252     */
2253    public final void append(CharSequence text) {
2254        append(text, 0, text.length());
2255    }
2256
2257    /**
2258     * Convenience method: Append the specified text slice to the TextView's
2259     * display buffer, upgrading it to BufferType.EDITABLE if it was
2260     * not already editable.
2261     */
2262    public void append(CharSequence text, int start, int end) {
2263        if (!(mText instanceof Editable)) {
2264            setText(mText, BufferType.EDITABLE);
2265        }
2266
2267        ((Editable) mText).append(text, start, end);
2268    }
2269
2270    private void updateTextColors() {
2271        boolean inval = false;
2272        int color = mTextColor.getColorForState(getDrawableState(), 0);
2273        if (color != mCurTextColor) {
2274            mCurTextColor = color;
2275            inval = true;
2276        }
2277        if (mLinkTextColor != null) {
2278            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2279            if (color != mTextPaint.linkColor) {
2280                mTextPaint.linkColor = color;
2281                inval = true;
2282            }
2283        }
2284        if (mHintTextColor != null) {
2285            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2286            if (color != mCurHintTextColor && mText.length() == 0) {
2287                mCurHintTextColor = color;
2288                inval = true;
2289            }
2290        }
2291        if (inval) {
2292            invalidate();
2293        }
2294    }
2295
2296    @Override
2297    protected void drawableStateChanged() {
2298        super.drawableStateChanged();
2299        if (mTextColor != null && mTextColor.isStateful()
2300                || (mHintTextColor != null && mHintTextColor.isStateful())
2301                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2302            updateTextColors();
2303        }
2304
2305        final Drawables dr = mDrawables;
2306        if (dr != null) {
2307            int[] state = getDrawableState();
2308            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2309                dr.mDrawableTop.setState(state);
2310            }
2311            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2312                dr.mDrawableBottom.setState(state);
2313            }
2314            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2315                dr.mDrawableLeft.setState(state);
2316            }
2317            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2318                dr.mDrawableRight.setState(state);
2319            }
2320        }
2321    }
2322
2323    /**
2324     * User interface state that is stored by TextView for implementing
2325     * {@link View#onSaveInstanceState}.
2326     */
2327    public static class SavedState extends BaseSavedState {
2328        int selStart;
2329        int selEnd;
2330        CharSequence text;
2331        boolean frozenWithFocus;
2332        CharSequence error;
2333
2334        SavedState(Parcelable superState) {
2335            super(superState);
2336        }
2337
2338        @Override
2339        public void writeToParcel(Parcel out, int flags) {
2340            super.writeToParcel(out, flags);
2341            out.writeInt(selStart);
2342            out.writeInt(selEnd);
2343            out.writeInt(frozenWithFocus ? 1 : 0);
2344            TextUtils.writeToParcel(text, out, flags);
2345
2346            if (error == null) {
2347                out.writeInt(0);
2348            } else {
2349                out.writeInt(1);
2350                TextUtils.writeToParcel(error, out, flags);
2351            }
2352        }
2353
2354        @Override
2355        public String toString() {
2356            String str = "TextView.SavedState{"
2357                    + Integer.toHexString(System.identityHashCode(this))
2358                    + " start=" + selStart + " end=" + selEnd;
2359            if (text != null) {
2360                str += " text=" + text;
2361            }
2362            return str + "}";
2363        }
2364
2365        @SuppressWarnings("hiding")
2366        public static final Parcelable.Creator<SavedState> CREATOR
2367                = new Parcelable.Creator<SavedState>() {
2368            public SavedState createFromParcel(Parcel in) {
2369                return new SavedState(in);
2370            }
2371
2372            public SavedState[] newArray(int size) {
2373                return new SavedState[size];
2374            }
2375        };
2376
2377        private SavedState(Parcel in) {
2378            super(in);
2379            selStart = in.readInt();
2380            selEnd = in.readInt();
2381            frozenWithFocus = (in.readInt() != 0);
2382            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2383
2384            if (in.readInt() != 0) {
2385                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2386            }
2387        }
2388    }
2389
2390    @Override
2391    public Parcelable onSaveInstanceState() {
2392        Parcelable superState = super.onSaveInstanceState();
2393
2394        // Save state if we are forced to
2395        boolean save = mFreezesText;
2396        int start = 0;
2397        int end = 0;
2398
2399        if (mText != null) {
2400            start = getSelectionStart();
2401            end = getSelectionEnd();
2402            if (start >= 0 || end >= 0) {
2403                // Or save state if there is a selection
2404                save = true;
2405            }
2406        }
2407
2408        if (save) {
2409            SavedState ss = new SavedState(superState);
2410            // XXX Should also save the current scroll position!
2411            ss.selStart = start;
2412            ss.selEnd = end;
2413
2414            if (mText instanceof Spanned) {
2415                /*
2416                 * Calling setText() strips off any ChangeWatchers;
2417                 * strip them now to avoid leaking references.
2418                 * But do it to a copy so that if there are any
2419                 * further changes to the text of this view, it
2420                 * won't get into an inconsistent state.
2421                 */
2422
2423                Spannable sp = new SpannableString(mText);
2424
2425                for (ChangeWatcher cw :
2426                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2427                    sp.removeSpan(cw);
2428                }
2429
2430                ss.text = sp;
2431            } else {
2432                ss.text = mText.toString();
2433            }
2434
2435            if (isFocused() && start >= 0 && end >= 0) {
2436                ss.frozenWithFocus = true;
2437            }
2438
2439            ss.error = mError;
2440
2441            return ss;
2442        }
2443
2444        return superState;
2445    }
2446
2447    @Override
2448    public void onRestoreInstanceState(Parcelable state) {
2449        if (!(state instanceof SavedState)) {
2450            super.onRestoreInstanceState(state);
2451            return;
2452        }
2453
2454        SavedState ss = (SavedState)state;
2455        super.onRestoreInstanceState(ss.getSuperState());
2456
2457        // XXX restore buffer type too, as well as lots of other stuff
2458        if (ss.text != null) {
2459            setText(ss.text);
2460        }
2461
2462        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2463            if (mText instanceof Spannable) {
2464                int len = mText.length();
2465
2466                if (ss.selStart > len || ss.selEnd > len) {
2467                    String restored = "";
2468
2469                    if (ss.text != null) {
2470                        restored = "(restored) ";
2471                    }
2472
2473                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2474                          "/" + ss.selEnd + " out of range for " + restored +
2475                          "text " + mText);
2476                } else {
2477                    Selection.setSelection((Spannable) mText, ss.selStart,
2478                                           ss.selEnd);
2479
2480                    if (ss.frozenWithFocus) {
2481                        mFrozenWithFocus = true;
2482                    }
2483                }
2484            }
2485        }
2486
2487        if (ss.error != null) {
2488            final CharSequence error = ss.error;
2489            // Display the error later, after the first layout pass
2490            post(new Runnable() {
2491                public void run() {
2492                    setError(error);
2493                }
2494            });
2495        }
2496    }
2497
2498    /**
2499     * Control whether this text view saves its entire text contents when
2500     * freezing to an icicle, in addition to dynamic state such as cursor
2501     * position.  By default this is false, not saving the text.  Set to true
2502     * if the text in the text view is not being saved somewhere else in
2503     * persistent storage (such as in a content provider) so that if the
2504     * view is later thawed the user will not lose their data.
2505     *
2506     * @param freezesText Controls whether a frozen icicle should include the
2507     * entire text data: true to include it, false to not.
2508     *
2509     * @attr ref android.R.styleable#TextView_freezesText
2510     */
2511    @android.view.RemotableViewMethod
2512    public void setFreezesText(boolean freezesText) {
2513        mFreezesText = freezesText;
2514    }
2515
2516    /**
2517     * Return whether this text view is including its entire text contents
2518     * in frozen icicles.
2519     *
2520     * @return Returns true if text is included, false if it isn't.
2521     *
2522     * @see #setFreezesText
2523     */
2524    public boolean getFreezesText() {
2525        return mFreezesText;
2526    }
2527
2528    ///////////////////////////////////////////////////////////////////////////
2529
2530    /**
2531     * Sets the Factory used to create new Editables.
2532     */
2533    public final void setEditableFactory(Editable.Factory factory) {
2534        mEditableFactory = factory;
2535        setText(mText);
2536    }
2537
2538    /**
2539     * Sets the Factory used to create new Spannables.
2540     */
2541    public final void setSpannableFactory(Spannable.Factory factory) {
2542        mSpannableFactory = factory;
2543        setText(mText);
2544    }
2545
2546    /**
2547     * Sets the string value of the TextView. TextView <em>does not</em> accept
2548     * HTML-like formatting, which you can do with text strings in XML resource files.
2549     * To style your strings, attach android.text.style.* objects to a
2550     * {@link android.text.SpannableString SpannableString}, or see the
2551     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2552     * Available Resource Types</a> documentation for an example of setting
2553     * formatted text in the XML resource file.
2554     *
2555     * @attr ref android.R.styleable#TextView_text
2556     */
2557    @android.view.RemotableViewMethod
2558    public final void setText(CharSequence text) {
2559        setText(text, mBufferType);
2560    }
2561
2562    /**
2563     * Like {@link #setText(CharSequence)},
2564     * except that the cursor position (if any) is retained in the new text.
2565     *
2566     * @param text The new text to place in the text view.
2567     *
2568     * @see #setText(CharSequence)
2569     */
2570    @android.view.RemotableViewMethod
2571    public final void setTextKeepState(CharSequence text) {
2572        setTextKeepState(text, mBufferType);
2573    }
2574
2575    /**
2576     * Sets the text that this TextView is to display (see
2577     * {@link #setText(CharSequence)}) and also sets whether it is stored
2578     * in a styleable/spannable buffer and whether it is editable.
2579     *
2580     * @attr ref android.R.styleable#TextView_text
2581     * @attr ref android.R.styleable#TextView_bufferType
2582     */
2583    public void setText(CharSequence text, BufferType type) {
2584        setText(text, type, true, 0);
2585
2586        if (mCharWrapper != null) {
2587            mCharWrapper.mChars = null;
2588        }
2589    }
2590
2591    private void setText(CharSequence text, BufferType type,
2592                         boolean notifyBefore, int oldlen) {
2593        if (text == null) {
2594            text = "";
2595        }
2596
2597        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2598
2599        if (text instanceof Spanned &&
2600            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2601            setHorizontalFadingEdgeEnabled(true);
2602            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2603        }
2604
2605        int n = mFilters.length;
2606        for (int i = 0; i < n; i++) {
2607            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2608                                                  EMPTY_SPANNED, 0, 0);
2609            if (out != null) {
2610                text = out;
2611            }
2612        }
2613
2614        if (notifyBefore) {
2615            if (mText != null) {
2616                oldlen = mText.length();
2617                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2618            } else {
2619                sendBeforeTextChanged("", 0, 0, text.length());
2620            }
2621        }
2622
2623        boolean needEditableForNotification = false;
2624
2625        if (mListeners != null && mListeners.size() != 0) {
2626            needEditableForNotification = true;
2627        }
2628
2629        if (type == BufferType.EDITABLE || mInput != null ||
2630            needEditableForNotification) {
2631            Editable t = mEditableFactory.newEditable(text);
2632            text = t;
2633            setFilters(t, mFilters);
2634            InputMethodManager imm = InputMethodManager.peekInstance();
2635            if (imm != null) imm.restartInput(this);
2636        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2637            text = mSpannableFactory.newSpannable(text);
2638        } else if (!(text instanceof CharWrapper)) {
2639            text = TextUtils.stringOrSpannedString(text);
2640        }
2641
2642        if (mAutoLinkMask != 0) {
2643            Spannable s2;
2644
2645            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2646                s2 = (Spannable) text;
2647            } else {
2648                s2 = mSpannableFactory.newSpannable(text);
2649            }
2650
2651            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2652                text = s2;
2653                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2654
2655                /*
2656                 * We must go ahead and set the text before changing the
2657                 * movement method, because setMovementMethod() may call
2658                 * setText() again to try to upgrade the buffer type.
2659                 */
2660                mText = text;
2661
2662                if (mLinksClickable) {
2663                    setMovementMethod(LinkMovementMethod.getInstance());
2664                }
2665            }
2666        }
2667
2668        mBufferType = type;
2669        mText = text;
2670
2671        if (mTransformation == null)
2672            mTransformed = text;
2673        else
2674            mTransformed = mTransformation.getTransformation(text, this);
2675
2676        final int textLength = text.length();
2677
2678        if (text instanceof Spannable) {
2679            Spannable sp = (Spannable) text;
2680
2681            // Remove any ChangeWatchers that might have come
2682            // from other TextViews.
2683            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2684            final int count = watchers.length;
2685            for (int i = 0; i < count; i++)
2686                sp.removeSpan(watchers[i]);
2687
2688            if (mChangeWatcher == null)
2689                mChangeWatcher = new ChangeWatcher();
2690
2691            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2692                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2693
2694            if (mInput != null) {
2695                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2696            }
2697
2698            if (mTransformation != null) {
2699                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2700
2701            }
2702
2703            if (mMovement != null) {
2704                mMovement.initialize(this, (Spannable) text);
2705
2706                /*
2707                 * Initializing the movement method will have set the
2708                 * selection, so reset mSelectionMoved to keep that from
2709                 * interfering with the normal on-focus selection-setting.
2710                 */
2711                mSelectionMoved = false;
2712            }
2713        }
2714
2715        if (mLayout != null) {
2716            checkForRelayout();
2717        }
2718
2719        sendOnTextChanged(text, 0, oldlen, textLength);
2720        onTextChanged(text, 0, oldlen, textLength);
2721
2722        if (needEditableForNotification) {
2723            sendAfterTextChanged((Editable) text);
2724        }
2725
2726        // SelectionModifierCursorController depends on canSelectText, which depends on text
2727        prepareCursorControllers();
2728    }
2729
2730    /**
2731     * Sets the TextView to display the specified slice of the specified
2732     * char array.  You must promise that you will not change the contents
2733     * of the array except for right before another call to setText(),
2734     * since the TextView has no way to know that the text
2735     * has changed and that it needs to invalidate and re-layout.
2736     */
2737    public final void setText(char[] text, int start, int len) {
2738        int oldlen = 0;
2739
2740        if (start < 0 || len < 0 || start + len > text.length) {
2741            throw new IndexOutOfBoundsException(start + ", " + len);
2742        }
2743
2744        /*
2745         * We must do the before-notification here ourselves because if
2746         * the old text is a CharWrapper we destroy it before calling
2747         * into the normal path.
2748         */
2749        if (mText != null) {
2750            oldlen = mText.length();
2751            sendBeforeTextChanged(mText, 0, oldlen, len);
2752        } else {
2753            sendBeforeTextChanged("", 0, 0, len);
2754        }
2755
2756        if (mCharWrapper == null) {
2757            mCharWrapper = new CharWrapper(text, start, len);
2758        } else {
2759            mCharWrapper.set(text, start, len);
2760        }
2761
2762        setText(mCharWrapper, mBufferType, false, oldlen);
2763    }
2764
2765    private static class CharWrapper
2766            implements CharSequence, GetChars, GraphicsOperations {
2767        private char[] mChars;
2768        private int mStart, mLength;
2769
2770        public CharWrapper(char[] chars, int start, int len) {
2771            mChars = chars;
2772            mStart = start;
2773            mLength = len;
2774        }
2775
2776        /* package */ void set(char[] chars, int start, int len) {
2777            mChars = chars;
2778            mStart = start;
2779            mLength = len;
2780        }
2781
2782        public int length() {
2783            return mLength;
2784        }
2785
2786        public char charAt(int off) {
2787            return mChars[off + mStart];
2788        }
2789
2790        @Override
2791        public String toString() {
2792            return new String(mChars, mStart, mLength);
2793        }
2794
2795        public CharSequence subSequence(int start, int end) {
2796            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2797                throw new IndexOutOfBoundsException(start + ", " + end);
2798            }
2799
2800            return new String(mChars, start + mStart, end - start);
2801        }
2802
2803        public void getChars(int start, int end, char[] buf, int off) {
2804            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2805                throw new IndexOutOfBoundsException(start + ", " + end);
2806            }
2807
2808            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2809        }
2810
2811        public void drawText(Canvas c, int start, int end,
2812                             float x, float y, Paint p) {
2813            c.drawText(mChars, start + mStart, end - start, x, y, p);
2814        }
2815
2816        public float measureText(int start, int end, Paint p) {
2817            return p.measureText(mChars, start + mStart, end - start);
2818        }
2819
2820        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2821            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2822        }
2823    }
2824
2825    /**
2826     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2827     * except that the cursor position (if any) is retained in the new text.
2828     *
2829     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2830     */
2831    public final void setTextKeepState(CharSequence text, BufferType type) {
2832        int start = getSelectionStart();
2833        int end = getSelectionEnd();
2834        int len = text.length();
2835
2836        setText(text, type);
2837
2838        if (start >= 0 || end >= 0) {
2839            if (mText instanceof Spannable) {
2840                Selection.setSelection((Spannable) mText,
2841                                       Math.max(0, Math.min(start, len)),
2842                                       Math.max(0, Math.min(end, len)));
2843            }
2844        }
2845    }
2846
2847    @android.view.RemotableViewMethod
2848    public final void setText(int resid) {
2849        setText(getContext().getResources().getText(resid));
2850    }
2851
2852    public final void setText(int resid, BufferType type) {
2853        setText(getContext().getResources().getText(resid), type);
2854    }
2855
2856    /**
2857     * Sets the text to be displayed when the text of the TextView is empty.
2858     * Null means to use the normal empty text. The hint does not currently
2859     * participate in determining the size of the view.
2860     *
2861     * @attr ref android.R.styleable#TextView_hint
2862     */
2863    @android.view.RemotableViewMethod
2864    public final void setHint(CharSequence hint) {
2865        mHint = TextUtils.stringOrSpannedString(hint);
2866
2867        if (mLayout != null) {
2868            checkForRelayout();
2869        }
2870
2871        if (mText.length() == 0) {
2872            invalidate();
2873        }
2874    }
2875
2876    /**
2877     * Sets the text to be displayed when the text of the TextView is empty,
2878     * from a resource.
2879     *
2880     * @attr ref android.R.styleable#TextView_hint
2881     */
2882    @android.view.RemotableViewMethod
2883    public final void setHint(int resid) {
2884        setHint(getContext().getResources().getText(resid));
2885    }
2886
2887    /**
2888     * Returns the hint that is displayed when the text of the TextView
2889     * is empty.
2890     *
2891     * @attr ref android.R.styleable#TextView_hint
2892     */
2893    @ViewDebug.CapturedViewProperty
2894    public CharSequence getHint() {
2895        return mHint;
2896    }
2897
2898    /**
2899     * Set the type of the content with a constant as defined for
2900     * {@link EditorInfo#inputType}.  This will take care of changing
2901     * the key listener, by calling {@link #setKeyListener(KeyListener)}, to
2902     * match the given content type.  If the given content type is
2903     * {@link EditorInfo#TYPE_NULL} then a soft keyboard will
2904     * not be displayed for this text view.
2905     *
2906     * @see #getInputType()
2907     * @see #setRawInputType(int)
2908     * @see android.text.InputType
2909     * @attr ref android.R.styleable#TextView_inputType
2910     */
2911    public void setInputType(int type) {
2912        final boolean wasPassword = isPasswordInputType(mInputType);
2913        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
2914        setInputType(type, false);
2915        final boolean isPassword = isPasswordInputType(type);
2916        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
2917        boolean forceUpdate = false;
2918        if (isPassword) {
2919            setTransformationMethod(PasswordTransformationMethod.getInstance());
2920            setTypefaceByIndex(MONOSPACE, 0);
2921        } else if (isVisiblePassword) {
2922            if (mTransformation == PasswordTransformationMethod.getInstance()) {
2923                forceUpdate = true;
2924            }
2925            setTypefaceByIndex(MONOSPACE, 0);
2926        } else if (wasPassword || wasVisiblePassword) {
2927            // not in password mode, clean up typeface and transformation
2928            setTypefaceByIndex(-1, -1);
2929            if (mTransformation == PasswordTransformationMethod.getInstance()) {
2930                forceUpdate = true;
2931            }
2932        }
2933
2934        boolean multiLine = (type&(EditorInfo.TYPE_MASK_CLASS
2935                        | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
2936                (EditorInfo.TYPE_CLASS_TEXT
2937                        | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
2938
2939        // We need to update the single line mode if it has changed or we
2940        // were previously in password mode.
2941        if (mSingleLine == multiLine || forceUpdate) {
2942            // Change single line mode, but only change the transformation if
2943            // we are not in password mode.
2944            applySingleLine(!multiLine, !isPassword);
2945        }
2946
2947        InputMethodManager imm = InputMethodManager.peekInstance();
2948        if (imm != null) imm.restartInput(this);
2949    }
2950
2951    private boolean isPasswordInputType(int inputType) {
2952        final int variation = inputType & (EditorInfo.TYPE_MASK_CLASS
2953                | EditorInfo.TYPE_MASK_VARIATION);
2954        return variation
2955                == (EditorInfo.TYPE_CLASS_TEXT
2956                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
2957    }
2958
2959    private boolean isVisiblePasswordInputType(int inputType) {
2960        final int variation = inputType & (EditorInfo.TYPE_MASK_CLASS
2961                | EditorInfo.TYPE_MASK_VARIATION);
2962        return variation
2963                == (EditorInfo.TYPE_CLASS_TEXT
2964                        | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
2965    }
2966
2967    /**
2968     * Directly change the content type integer of the text view, without
2969     * modifying any other state.
2970     * @see #setInputType(int)
2971     * @see android.text.InputType
2972     * @attr ref android.R.styleable#TextView_inputType
2973     */
2974    public void setRawInputType(int type) {
2975        mInputType = type;
2976    }
2977
2978    private void setInputType(int type, boolean direct) {
2979        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
2980        KeyListener input;
2981        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
2982            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
2983            TextKeyListener.Capitalize cap;
2984            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
2985                cap = TextKeyListener.Capitalize.CHARACTERS;
2986            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
2987                cap = TextKeyListener.Capitalize.WORDS;
2988            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
2989                cap = TextKeyListener.Capitalize.SENTENCES;
2990            } else {
2991                cap = TextKeyListener.Capitalize.NONE;
2992            }
2993            input = TextKeyListener.getInstance(autotext, cap);
2994        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
2995            input = DigitsKeyListener.getInstance(
2996                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
2997                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
2998        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
2999            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3000                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3001                    input = DateKeyListener.getInstance();
3002                    break;
3003                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3004                    input = TimeKeyListener.getInstance();
3005                    break;
3006                default:
3007                    input = DateTimeKeyListener.getInstance();
3008                    break;
3009            }
3010        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3011            input = DialerKeyListener.getInstance();
3012        } else {
3013            input = TextKeyListener.getInstance();
3014        }
3015        setRawInputType(type);
3016        if (direct) mInput = input;
3017        else {
3018            setKeyListenerOnly(input);
3019        }
3020    }
3021
3022    /**
3023     * Get the type of the content.
3024     *
3025     * @see #setInputType(int)
3026     * @see android.text.InputType
3027     */
3028    public int getInputType() {
3029        return mInputType;
3030    }
3031
3032    /**
3033     * Change the editor type integer associated with the text view, which
3034     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3035     * has focus.
3036     * @see #getImeOptions
3037     * @see android.view.inputmethod.EditorInfo
3038     * @attr ref android.R.styleable#TextView_imeOptions
3039     */
3040    public void setImeOptions(int imeOptions) {
3041        if (mInputContentType == null) {
3042            mInputContentType = new InputContentType();
3043        }
3044        mInputContentType.imeOptions = imeOptions;
3045    }
3046
3047    /**
3048     * Get the type of the IME editor.
3049     *
3050     * @see #setImeOptions(int)
3051     * @see android.view.inputmethod.EditorInfo
3052     */
3053    public int getImeOptions() {
3054        return mInputContentType != null
3055                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3056    }
3057
3058    /**
3059     * Change the custom IME action associated with the text view, which
3060     * will be reported to an IME with {@link EditorInfo#actionLabel}
3061     * and {@link EditorInfo#actionId} when it has focus.
3062     * @see #getImeActionLabel
3063     * @see #getImeActionId
3064     * @see android.view.inputmethod.EditorInfo
3065     * @attr ref android.R.styleable#TextView_imeActionLabel
3066     * @attr ref android.R.styleable#TextView_imeActionId
3067     */
3068    public void setImeActionLabel(CharSequence label, int actionId) {
3069        if (mInputContentType == null) {
3070            mInputContentType = new InputContentType();
3071        }
3072        mInputContentType.imeActionLabel = label;
3073        mInputContentType.imeActionId = actionId;
3074    }
3075
3076    /**
3077     * Get the IME action label previous set with {@link #setImeActionLabel}.
3078     *
3079     * @see #setImeActionLabel
3080     * @see android.view.inputmethod.EditorInfo
3081     */
3082    public CharSequence getImeActionLabel() {
3083        return mInputContentType != null
3084                ? mInputContentType.imeActionLabel : null;
3085    }
3086
3087    /**
3088     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3089     *
3090     * @see #setImeActionLabel
3091     * @see android.view.inputmethod.EditorInfo
3092     */
3093    public int getImeActionId() {
3094        return mInputContentType != null
3095                ? mInputContentType.imeActionId : 0;
3096    }
3097
3098    /**
3099     * Set a special listener to be called when an action is performed
3100     * on the text view.  This will be called when the enter key is pressed,
3101     * or when an action supplied to the IME is selected by the user.  Setting
3102     * this means that the normal hard key event will not insert a newline
3103     * into the text view, even if it is multi-line; holding down the ALT
3104     * modifier will, however, allow the user to insert a newline character.
3105     */
3106    public void setOnEditorActionListener(OnEditorActionListener l) {
3107        if (mInputContentType == null) {
3108            mInputContentType = new InputContentType();
3109        }
3110        mInputContentType.onEditorActionListener = l;
3111    }
3112
3113    /**
3114     * Called when an attached input method calls
3115     * {@link InputConnection#performEditorAction(int)
3116     * InputConnection.performEditorAction()}
3117     * for this text view.  The default implementation will call your action
3118     * listener supplied to {@link #setOnEditorActionListener}, or perform
3119     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3120     * EditorInfo.IME_ACTION_NEXT} or {@link EditorInfo#IME_ACTION_DONE
3121     * EditorInfo.IME_ACTION_DONE}.
3122     *
3123     * <p>For backwards compatibility, if no IME options have been set and the
3124     * text view would not normally advance focus on enter, then
3125     * the NEXT and DONE actions received here will be turned into an enter
3126     * key down/up pair to go through the normal key handling.
3127     *
3128     * @param actionCode The code of the action being performed.
3129     *
3130     * @see #setOnEditorActionListener
3131     */
3132    public void onEditorAction(int actionCode) {
3133        final InputContentType ict = mInputContentType;
3134        if (ict != null) {
3135            if (ict.onEditorActionListener != null) {
3136                if (ict.onEditorActionListener.onEditorAction(this,
3137                        actionCode, null)) {
3138                    return;
3139                }
3140            }
3141
3142            // This is the handling for some default action.
3143            // Note that for backwards compatibility we don't do this
3144            // default handling if explicit ime options have not been given,
3145            // instead turning this into the normal enter key codes that an
3146            // app may be expecting.
3147            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3148                View v = focusSearch(FOCUS_DOWN);
3149                if (v != null) {
3150                    if (!v.requestFocus(FOCUS_DOWN)) {
3151                        throw new IllegalStateException("focus search returned a view " +
3152                                "that wasn't able to take focus!");
3153                    }
3154                }
3155                return;
3156
3157            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3158                InputMethodManager imm = InputMethodManager.peekInstance();
3159                if (imm != null) {
3160                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3161                }
3162                return;
3163            }
3164        }
3165
3166        Handler h = getHandler();
3167        if (h != null) {
3168            long eventTime = SystemClock.uptimeMillis();
3169            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3170                    new KeyEvent(eventTime, eventTime,
3171                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0, 0, 0,
3172                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3173                    | KeyEvent.FLAG_EDITOR_ACTION)));
3174            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3175                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3176                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0, 0, 0,
3177                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3178                    | KeyEvent.FLAG_EDITOR_ACTION)));
3179        }
3180    }
3181
3182    /**
3183     * Set the private content type of the text, which is the
3184     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3185     * field that will be filled in when creating an input connection.
3186     *
3187     * @see #getPrivateImeOptions()
3188     * @see EditorInfo#privateImeOptions
3189     * @attr ref android.R.styleable#TextView_privateImeOptions
3190     */
3191    public void setPrivateImeOptions(String type) {
3192        if (mInputContentType == null) mInputContentType = new InputContentType();
3193        mInputContentType.privateImeOptions = type;
3194    }
3195
3196    /**
3197     * Get the private type of the content.
3198     *
3199     * @see #setPrivateImeOptions(String)
3200     * @see EditorInfo#privateImeOptions
3201     */
3202    public String getPrivateImeOptions() {
3203        return mInputContentType != null
3204                ? mInputContentType.privateImeOptions : null;
3205    }
3206
3207    /**
3208     * Set the extra input data of the text, which is the
3209     * {@link EditorInfo#extras TextBoxAttribute.extras}
3210     * Bundle that will be filled in when creating an input connection.  The
3211     * given integer is the resource ID of an XML resource holding an
3212     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3213     *
3214     * @see #getInputExtras(boolean)
3215     * @see EditorInfo#extras
3216     * @attr ref android.R.styleable#TextView_editorExtras
3217     */
3218    public void setInputExtras(int xmlResId)
3219            throws XmlPullParserException, IOException {
3220        XmlResourceParser parser = getResources().getXml(xmlResId);
3221        if (mInputContentType == null) mInputContentType = new InputContentType();
3222        mInputContentType.extras = new Bundle();
3223        getResources().parseBundleExtras(parser, mInputContentType.extras);
3224    }
3225
3226    /**
3227     * Retrieve the input extras currently associated with the text view, which
3228     * can be viewed as well as modified.
3229     *
3230     * @param create If true, the extras will be created if they don't already
3231     * exist.  Otherwise, null will be returned if none have been created.
3232     * @see #setInputExtras(int)
3233     * @see EditorInfo#extras
3234     * @attr ref android.R.styleable#TextView_editorExtras
3235     */
3236    public Bundle getInputExtras(boolean create) {
3237        if (mInputContentType == null) {
3238            if (!create) return null;
3239            mInputContentType = new InputContentType();
3240        }
3241        if (mInputContentType.extras == null) {
3242            if (!create) return null;
3243            mInputContentType.extras = new Bundle();
3244        }
3245        return mInputContentType.extras;
3246    }
3247
3248    /**
3249     * Returns the error message that was set to be displayed with
3250     * {@link #setError}, or <code>null</code> if no error was set
3251     * or if it the error was cleared by the widget after user input.
3252     */
3253    public CharSequence getError() {
3254        return mError;
3255    }
3256
3257    /**
3258     * Sets the right-hand compound drawable of the TextView to the "error"
3259     * icon and sets an error message that will be displayed in a popup when
3260     * the TextView has focus.  The icon and error message will be reset to
3261     * null when any key events cause changes to the TextView's text.  If the
3262     * <code>error</code> is <code>null</code>, the error message and icon
3263     * will be cleared.
3264     */
3265    @android.view.RemotableViewMethod
3266    public void setError(CharSequence error) {
3267        if (error == null) {
3268            setError(null, null);
3269        } else {
3270            Drawable dr = getContext().getResources().
3271                getDrawable(com.android.internal.R.drawable.
3272                            indicator_input_error);
3273
3274            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3275            setError(error, dr);
3276        }
3277    }
3278
3279    /**
3280     * Sets the right-hand compound drawable of the TextView to the specified
3281     * icon and sets an error message that will be displayed in a popup when
3282     * the TextView has focus.  The icon and error message will be reset to
3283     * null when any key events cause changes to the TextView's text.  The
3284     * drawable must already have had {@link Drawable#setBounds} set on it.
3285     * If the <code>error</code> is <code>null</code>, the error message will
3286     * be cleared (and you should provide a <code>null</code> icon as well).
3287     */
3288    public void setError(CharSequence error, Drawable icon) {
3289        error = TextUtils.stringOrSpannedString(error);
3290
3291        mError = error;
3292        mErrorWasChanged = true;
3293        final Drawables dr = mDrawables;
3294        if (dr != null) {
3295            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop,
3296                                 icon, dr.mDrawableBottom);
3297        } else {
3298            setCompoundDrawables(null, null, icon, null);
3299        }
3300
3301        if (error == null) {
3302            if (mPopup != null) {
3303                if (mPopup.isShowing()) {
3304                    mPopup.dismiss();
3305                }
3306
3307                mPopup = null;
3308            }
3309        } else {
3310            if (isFocused()) {
3311                showError();
3312            }
3313        }
3314    }
3315
3316    private void showError() {
3317        if (getWindowToken() == null) {
3318            mShowErrorAfterAttach = true;
3319            return;
3320        }
3321
3322        if (mPopup == null) {
3323            LayoutInflater inflater = LayoutInflater.from(getContext());
3324            final TextView err = (TextView) inflater.inflate(com.android.internal.R.layout.textview_hint,
3325                    null);
3326
3327            final float scale = getResources().getDisplayMetrics().density;
3328            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f),
3329                    (int) (50 * scale + 0.5f));
3330            mPopup.setFocusable(false);
3331            // The user is entering text, so the input method is needed.  We
3332            // don't want the popup to be displayed on top of it.
3333            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3334        }
3335
3336        TextView tv = (TextView) mPopup.getContentView();
3337        chooseSize(mPopup, mError, tv);
3338        tv.setText(mError);
3339
3340        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3341        mPopup.fixDirection(mPopup.isAboveAnchor());
3342    }
3343
3344    private static class ErrorPopup extends PopupWindow {
3345        private boolean mAbove = false;
3346        private final TextView mView;
3347
3348        ErrorPopup(TextView v, int width, int height) {
3349            super(v, width, height);
3350            mView = v;
3351        }
3352
3353        void fixDirection(boolean above) {
3354            mAbove = above;
3355
3356            if (above) {
3357                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error_above);
3358            } else {
3359                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error);
3360            }
3361        }
3362
3363        @Override
3364        public void update(int x, int y, int w, int h, boolean force) {
3365            super.update(x, y, w, h, force);
3366
3367            boolean above = isAboveAnchor();
3368            if (above != mAbove) {
3369                fixDirection(above);
3370            }
3371        }
3372    }
3373
3374    /**
3375     * Returns the Y offset to make the pointy top of the error point
3376     * at the middle of the error icon.
3377     */
3378    private int getErrorX() {
3379        /*
3380         * The "25" is the distance between the point and the right edge
3381         * of the background
3382         */
3383        final float scale = getResources().getDisplayMetrics().density;
3384
3385        final Drawables dr = mDrawables;
3386        return getWidth() - mPopup.getWidth()
3387                - getPaddingRight()
3388                - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3389    }
3390
3391    /**
3392     * Returns the Y offset to make the pointy top of the error point
3393     * at the bottom of the error icon.
3394     */
3395    private int getErrorY() {
3396        /*
3397         * Compound, not extended, because the icon is not clipped
3398         * if the text height is smaller.
3399         */
3400        int vspace = mBottom - mTop -
3401                     getCompoundPaddingBottom() - getCompoundPaddingTop();
3402
3403        final Drawables dr = mDrawables;
3404        int icontop = getCompoundPaddingTop()
3405                + (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3406
3407        /*
3408         * The "2" is the distance between the point and the top edge
3409         * of the background.
3410         */
3411
3412        return icontop + (dr != null ? dr.mDrawableHeightRight : 0)
3413                - getHeight() - 2;
3414    }
3415
3416    private void hideError() {
3417        if (mPopup != null) {
3418            if (mPopup.isShowing()) {
3419                mPopup.dismiss();
3420            }
3421        }
3422
3423        mShowErrorAfterAttach = false;
3424    }
3425
3426    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3427        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3428        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3429
3430        /*
3431         * Figure out how big the text would be if we laid it out to the
3432         * full width of this view minus the border.
3433         */
3434        int cap = getWidth() - wid;
3435        if (cap < 0) {
3436            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3437        }
3438
3439        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3440                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3441        float max = 0;
3442        for (int i = 0; i < l.getLineCount(); i++) {
3443            max = Math.max(max, l.getLineWidth(i));
3444        }
3445
3446        /*
3447         * Now set the popup size to be big enough for the text plus the border.
3448         */
3449        pop.setWidth(wid + (int) Math.ceil(max));
3450        pop.setHeight(ht + l.getHeight());
3451    }
3452
3453
3454    @Override
3455    protected boolean setFrame(int l, int t, int r, int b) {
3456        boolean result = super.setFrame(l, t, r, b);
3457
3458        if (mPopup != null) {
3459            TextView tv = (TextView) mPopup.getContentView();
3460            chooseSize(mPopup, mError, tv);
3461            mPopup.update(this, getErrorX(), getErrorY(),
3462                          mPopup.getWidth(), mPopup.getHeight());
3463        }
3464
3465        restartMarqueeIfNeeded();
3466
3467        return result;
3468    }
3469
3470    private void restartMarqueeIfNeeded() {
3471        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3472            mRestartMarquee = false;
3473            startMarquee();
3474        }
3475    }
3476
3477    /**
3478     * Sets the list of input filters that will be used if the buffer is
3479     * Editable.  Has no effect otherwise.
3480     *
3481     * @attr ref android.R.styleable#TextView_maxLength
3482     */
3483    public void setFilters(InputFilter[] filters) {
3484        if (filters == null) {
3485            throw new IllegalArgumentException();
3486        }
3487
3488        mFilters = filters;
3489
3490        if (mText instanceof Editable) {
3491            setFilters((Editable) mText, filters);
3492        }
3493    }
3494
3495    /**
3496     * Sets the list of input filters on the specified Editable,
3497     * and includes mInput in the list if it is an InputFilter.
3498     */
3499    private void setFilters(Editable e, InputFilter[] filters) {
3500        if (mInput instanceof InputFilter) {
3501            InputFilter[] nf = new InputFilter[filters.length + 1];
3502
3503            System.arraycopy(filters, 0, nf, 0, filters.length);
3504            nf[filters.length] = (InputFilter) mInput;
3505
3506            e.setFilters(nf);
3507        } else {
3508            e.setFilters(filters);
3509        }
3510    }
3511
3512    /**
3513     * Returns the current list of input filters.
3514     */
3515    public InputFilter[] getFilters() {
3516        return mFilters;
3517    }
3518
3519    /////////////////////////////////////////////////////////////////////////
3520
3521    private int getVerticalOffset(boolean forceNormal) {
3522        int voffset = 0;
3523        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3524
3525        Layout l = mLayout;
3526        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3527            l = mHintLayout;
3528        }
3529
3530        if (gravity != Gravity.TOP) {
3531            int boxht;
3532
3533            if (l == mHintLayout) {
3534                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3535                        getCompoundPaddingBottom();
3536            } else {
3537                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3538                        getExtendedPaddingBottom();
3539            }
3540            int textht = l.getHeight();
3541
3542            if (textht < boxht) {
3543                if (gravity == Gravity.BOTTOM)
3544                    voffset = boxht - textht;
3545                else // (gravity == Gravity.CENTER_VERTICAL)
3546                    voffset = (boxht - textht) >> 1;
3547            }
3548        }
3549        return voffset;
3550    }
3551
3552    private int getBottomVerticalOffset(boolean forceNormal) {
3553        int voffset = 0;
3554        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3555
3556        Layout l = mLayout;
3557        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3558            l = mHintLayout;
3559        }
3560
3561        if (gravity != Gravity.BOTTOM) {
3562            int boxht;
3563
3564            if (l == mHintLayout) {
3565                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3566                        getCompoundPaddingBottom();
3567            } else {
3568                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3569                        getExtendedPaddingBottom();
3570            }
3571            int textht = l.getHeight();
3572
3573            if (textht < boxht) {
3574                if (gravity == Gravity.TOP)
3575                    voffset = boxht - textht;
3576                else // (gravity == Gravity.CENTER_VERTICAL)
3577                    voffset = (boxht - textht) >> 1;
3578            }
3579        }
3580        return voffset;
3581    }
3582
3583    private void invalidateCursorPath() {
3584        if (mHighlightPathBogus) {
3585            invalidateCursor();
3586        } else {
3587            synchronized (sTempRect) {
3588                /*
3589                 * The reason for this concern about the thickness of the
3590                 * cursor and doing the floor/ceil on the coordinates is that
3591                 * some EditTexts (notably textfields in the Browser) have
3592                 * anti-aliased text where not all the characters are
3593                 * necessarily at integer-multiple locations.  This should
3594                 * make sure the entire cursor gets invalidated instead of
3595                 * sometimes missing half a pixel.
3596                 */
3597
3598                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3599                if (thick < 1.0f) {
3600                    thick = 1.0f;
3601                }
3602
3603                thick /= 2;
3604
3605                mHighlightPath.computeBounds(sTempRect, false);
3606
3607                int left = getCompoundPaddingLeft();
3608                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3609
3610                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3611                           (int) FloatMath.floor(top + sTempRect.top - thick),
3612                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3613                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3614            }
3615        }
3616    }
3617
3618    private void invalidateCursor() {
3619        int where = getSelectionEnd();
3620
3621        invalidateCursor(where, where, where);
3622    }
3623
3624    private void invalidateCursor(int a, int b, int c) {
3625        if (mLayout == null) {
3626            invalidate();
3627        } else {
3628            if (a >= 0 || b >= 0 || c >= 0) {
3629                int first = Math.min(Math.min(a, b), c);
3630                int last = Math.max(Math.max(a, b), c);
3631
3632                int line = mLayout.getLineForOffset(first);
3633                int top = mLayout.getLineTop(line);
3634
3635                // This is ridiculous, but the descent from the line above
3636                // can hang down into the line we really want to redraw,
3637                // so we have to invalidate part of the line above to make
3638                // sure everything that needs to be redrawn really is.
3639                // (But not the whole line above, because that would cause
3640                // the same problem with the descenders on the line above it!)
3641                if (line > 0) {
3642                    top -= mLayout.getLineDescent(line - 1);
3643                }
3644
3645                int line2;
3646
3647                if (first == last)
3648                    line2 = line;
3649                else
3650                    line2 = mLayout.getLineForOffset(last);
3651
3652                int bottom = mLayout.getLineTop(line2 + 1);
3653                int voffset = getVerticalOffset(true);
3654
3655                int left = getCompoundPaddingLeft() + mScrollX;
3656                invalidate(left, top + voffset + getExtendedPaddingTop(),
3657                           left + getWidth() - getCompoundPaddingLeft() -
3658                           getCompoundPaddingRight(),
3659                           bottom + voffset + getExtendedPaddingTop());
3660            }
3661        }
3662    }
3663
3664    private void registerForPreDraw() {
3665        final ViewTreeObserver observer = getViewTreeObserver();
3666        if (observer == null) {
3667            return;
3668        }
3669
3670        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3671            observer.addOnPreDrawListener(this);
3672            mPreDrawState = PREDRAW_PENDING;
3673        } else if (mPreDrawState == PREDRAW_DONE) {
3674            mPreDrawState = PREDRAW_PENDING;
3675        }
3676
3677        // else state is PREDRAW_PENDING, so keep waiting.
3678    }
3679
3680    /**
3681     * {@inheritDoc}
3682     */
3683    public boolean onPreDraw() {
3684        if (mPreDrawState != PREDRAW_PENDING) {
3685            return true;
3686        }
3687
3688        if (mLayout == null) {
3689            assumeLayout();
3690        }
3691
3692        boolean changed = false;
3693
3694        SelectionModifierCursorController selectionController = null;
3695        if (mSelectionModifierCursorController != null) {
3696            selectionController = (SelectionModifierCursorController)
3697                mSelectionModifierCursorController;
3698        }
3699
3700
3701        if (mMovement != null) {
3702            /* This code also provides auto-scrolling when a cursor is moved using a
3703             * CursorController (insertion point or selection limits).
3704             * For selection, ensure start or end is visible depending on controller's state.
3705             */
3706            int curs = getSelectionEnd();
3707            if (selectionController != null && selectionController.isSelectionStartDragged()) {
3708                curs = getSelectionStart();
3709            }
3710
3711            /*
3712             * TODO: This should really only keep the end in view if
3713             * it already was before the text changed.  I'm not sure
3714             * of a good way to tell from here if it was.
3715             */
3716            if (curs < 0 &&
3717                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3718                curs = mText.length();
3719            }
3720
3721            if (curs >= 0) {
3722                changed = bringPointIntoView(curs);
3723            }
3724        } else {
3725            changed = bringTextIntoView();
3726        }
3727
3728        // This has to be checked here since:
3729        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3730        //   a screen rotation) since layout is not yet initialized at that point.
3731        // - ExtractEditText does not call onFocus when it is displayed. Fixing this issue would
3732        //   allow to test for hasSelection in onFocusChanged, which would trigger a
3733        //   startTextSelectionMode here. TODO
3734        if (selectionController != null && hasSelection()) {
3735            startTextSelectionMode();
3736        }
3737
3738        mPreDrawState = PREDRAW_DONE;
3739        return !changed;
3740    }
3741
3742    @Override
3743    protected void onAttachedToWindow() {
3744        super.onAttachedToWindow();
3745
3746        mTemporaryDetach = false;
3747
3748        if (mShowErrorAfterAttach) {
3749            showError();
3750            mShowErrorAfterAttach = false;
3751        }
3752
3753        updateOverlay();
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        setOverlayEnabled(false);
3773    }
3774
3775    @Override
3776    protected boolean isPaddingOffsetRequired() {
3777        return mShadowRadius != 0 || mDrawables != null;
3778    }
3779
3780    @Override
3781    protected int getLeftPaddingOffset() {
3782        return getCompoundPaddingLeft() - mPaddingLeft +
3783                (int) Math.min(0, mShadowDx - mShadowRadius);
3784    }
3785
3786    @Override
3787    protected int getTopPaddingOffset() {
3788        return (int) Math.min(0, mShadowDy - mShadowRadius);
3789    }
3790
3791    @Override
3792    protected int getBottomPaddingOffset() {
3793        return (int) Math.max(0, mShadowDy + mShadowRadius);
3794    }
3795
3796    @Override
3797    protected int getRightPaddingOffset() {
3798        return -(getCompoundPaddingRight() - mPaddingRight) +
3799                (int) Math.max(0, mShadowDx + mShadowRadius);
3800    }
3801
3802    @Override
3803    protected boolean verifyDrawable(Drawable who) {
3804        final boolean verified = super.verifyDrawable(who);
3805        if (!verified && mDrawables != null) {
3806            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
3807                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
3808        }
3809        return verified;
3810    }
3811
3812    @Override
3813    public void invalidateDrawable(Drawable drawable) {
3814        if (verifyDrawable(drawable)) {
3815            final Rect dirty = drawable.getBounds();
3816            int scrollX = mScrollX;
3817            int scrollY = mScrollY;
3818
3819            // IMPORTANT: The coordinates below are based on the coordinates computed
3820            // for each compound drawable in onDraw(). Make sure to update each section
3821            // accordingly.
3822            final TextView.Drawables drawables = mDrawables;
3823            if (drawables != null) {
3824                if (drawable == drawables.mDrawableLeft) {
3825                    final int compoundPaddingTop = getCompoundPaddingTop();
3826                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3827                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3828
3829                    scrollX += mPaddingLeft;
3830                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
3831                } else if (drawable == drawables.mDrawableRight) {
3832                    final int compoundPaddingTop = getCompoundPaddingTop();
3833                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3834                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3835
3836                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
3837                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
3838                } else if (drawable == drawables.mDrawableTop) {
3839                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3840                    final int compoundPaddingRight = getCompoundPaddingRight();
3841                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3842
3843                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
3844                    scrollY += mPaddingTop;
3845                } else if (drawable == drawables.mDrawableBottom) {
3846                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3847                    final int compoundPaddingRight = getCompoundPaddingRight();
3848                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3849
3850                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
3851                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
3852                }
3853            }
3854
3855            invalidate(dirty.left + scrollX, dirty.top + scrollY,
3856                    dirty.right + scrollX, dirty.bottom + scrollY);
3857        }
3858    }
3859
3860    @Override
3861    protected void onDraw(Canvas canvas) {
3862        restartMarqueeIfNeeded();
3863
3864        // Draw the background for this view
3865        super.onDraw(canvas);
3866
3867        final int compoundPaddingLeft = getCompoundPaddingLeft();
3868        final int compoundPaddingTop = getCompoundPaddingTop();
3869        final int compoundPaddingRight = getCompoundPaddingRight();
3870        final int compoundPaddingBottom = getCompoundPaddingBottom();
3871        final int scrollX = mScrollX;
3872        final int scrollY = mScrollY;
3873        final int right = mRight;
3874        final int left = mLeft;
3875        final int bottom = mBottom;
3876        final int top = mTop;
3877
3878        final Drawables dr = mDrawables;
3879        if (dr != null) {
3880            /*
3881             * Compound, not extended, because the icon is not clipped
3882             * if the text height is smaller.
3883             */
3884
3885            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
3886            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
3887
3888            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3889            // Make sure to update invalidateDrawable() when changing this code.
3890            if (dr.mDrawableLeft != null) {
3891                canvas.save();
3892                canvas.translate(scrollX + mPaddingLeft,
3893                                 scrollY + compoundPaddingTop +
3894                                 (vspace - dr.mDrawableHeightLeft) / 2);
3895                dr.mDrawableLeft.draw(canvas);
3896                canvas.restore();
3897            }
3898
3899            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3900            // Make sure to update invalidateDrawable() when changing this code.
3901            if (dr.mDrawableRight != null) {
3902                canvas.save();
3903                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
3904                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
3905                dr.mDrawableRight.draw(canvas);
3906                canvas.restore();
3907            }
3908
3909            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3910            // Make sure to update invalidateDrawable() when changing this code.
3911            if (dr.mDrawableTop != null) {
3912                canvas.save();
3913                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
3914                        scrollY + mPaddingTop);
3915                dr.mDrawableTop.draw(canvas);
3916                canvas.restore();
3917            }
3918
3919            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3920            // Make sure to update invalidateDrawable() when changing this code.
3921            if (dr.mDrawableBottom != null) {
3922                canvas.save();
3923                canvas.translate(scrollX + compoundPaddingLeft +
3924                        (hspace - dr.mDrawableWidthBottom) / 2,
3925                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
3926                dr.mDrawableBottom.draw(canvas);
3927                canvas.restore();
3928            }
3929        }
3930
3931        if (mPreDrawState == PREDRAW_DONE) {
3932            final ViewTreeObserver observer = getViewTreeObserver();
3933            if (observer != null) {
3934                observer.removeOnPreDrawListener(this);
3935                mPreDrawState = PREDRAW_NOT_REGISTERED;
3936            }
3937        }
3938
3939        int color = mCurTextColor;
3940
3941        if (mLayout == null) {
3942            assumeLayout();
3943        }
3944
3945        Layout layout = mLayout;
3946        int cursorcolor = color;
3947
3948        if (mHint != null && mText.length() == 0) {
3949            if (mHintTextColor != null) {
3950                color = mCurHintTextColor;
3951            }
3952
3953            layout = mHintLayout;
3954        }
3955
3956        mTextPaint.setColor(color);
3957        mTextPaint.drawableState = getDrawableState();
3958
3959        canvas.save();
3960        /*  Would be faster if we didn't have to do this. Can we chop the
3961            (displayable) text so that we don't need to do this ever?
3962        */
3963
3964        int extendedPaddingTop = getExtendedPaddingTop();
3965        int extendedPaddingBottom = getExtendedPaddingBottom();
3966
3967        float clipLeft = compoundPaddingLeft + scrollX;
3968        float clipTop = extendedPaddingTop + scrollY;
3969        float clipRight = right - left - compoundPaddingRight + scrollX;
3970        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
3971
3972        if (mShadowRadius != 0) {
3973            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
3974            clipRight += Math.max(0, mShadowDx + mShadowRadius);
3975
3976            clipTop += Math.min(0, mShadowDy - mShadowRadius);
3977            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
3978        }
3979
3980        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
3981
3982        int voffsetText = 0;
3983        int voffsetCursor = 0;
3984
3985        // translate in by our padding
3986        {
3987            /* shortcircuit calling getVerticaOffset() */
3988            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
3989                voffsetText = getVerticalOffset(false);
3990                voffsetCursor = getVerticalOffset(true);
3991            }
3992            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
3993        }
3994
3995        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3996            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
3997                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
3998                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
3999                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4000            }
4001
4002            if (mMarquee != null && mMarquee.isRunning()) {
4003                canvas.translate(-mMarquee.mScroll, 0.0f);
4004            }
4005        }
4006
4007        Path highlight = null;
4008        int selStart = -1, selEnd = -1;
4009
4010        //  If there is no movement method, then there can be no selection.
4011        //  Check that first and attempt to skip everything having to do with
4012        //  the cursor.
4013        //  XXX This is not strictly true -- a program could set the
4014        //  selection manually if it really wanted to.
4015        if (mMovement != null && (isFocused() || isPressed())) {
4016            selStart = getSelectionStart();
4017            selEnd = getSelectionEnd();
4018
4019            if (mCursorVisible && selStart >= 0 && isEnabled()) {
4020                if (mHighlightPath == null)
4021                    mHighlightPath = new Path();
4022
4023                if (selStart == selEnd) {
4024                    if ((SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4025                        if (mHighlightPathBogus) {
4026                            mHighlightPath.reset();
4027                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4028                            mHighlightPathBogus = false;
4029                        }
4030
4031                        // XXX should pass to skin instead of drawing directly
4032                        mHighlightPaint.setColor(cursorcolor);
4033                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4034
4035                        highlight = mHighlightPath;
4036                    }
4037                } else {
4038                    if (mHighlightPathBogus) {
4039                        mHighlightPath.reset();
4040                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4041                        mHighlightPathBogus = false;
4042                    }
4043
4044                    // XXX should pass to skin instead of drawing directly
4045                    mHighlightPaint.setColor(mHighlightColor);
4046                    mHighlightPaint.setStyle(Paint.Style.FILL);
4047
4048                    highlight = mHighlightPath;
4049                }
4050            }
4051        }
4052
4053        /*  Comment out until we decide what to do about animations
4054        boolean isLinearTextOn = false;
4055        if (currentTransformation != null) {
4056            isLinearTextOn = mTextPaint.isLinearTextOn();
4057            Matrix m = currentTransformation.getMatrix();
4058            if (!m.isIdentity()) {
4059                // mTextPaint.setLinearTextOn(true);
4060            }
4061        }
4062        */
4063
4064        final InputMethodState ims = mInputMethodState;
4065        if (ims != null && ims.mBatchEditNesting == 0) {
4066            InputMethodManager imm = InputMethodManager.peekInstance();
4067            if (imm != null) {
4068                if (imm.isActive(this)) {
4069                    boolean reported = false;
4070                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4071                        // We are in extract mode and the content has changed
4072                        // in some way... just report complete new text to the
4073                        // input method.
4074                        reported = reportExtractedText();
4075                    }
4076                    if (!reported && highlight != null) {
4077                        int candStart = -1;
4078                        int candEnd = -1;
4079                        if (mText instanceof Spannable) {
4080                            Spannable sp = (Spannable)mText;
4081                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4082                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4083                        }
4084                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4085                    }
4086                }
4087
4088                if (imm.isWatchingCursor(this) && highlight != null) {
4089                    highlight.computeBounds(ims.mTmpRectF, true);
4090                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4091
4092                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4093                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4094
4095                    ims.mTmpRectF.offset(0, voffsetCursor - voffsetText);
4096
4097                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4098                            (int)(ims.mTmpRectF.top + 0.5),
4099                            (int)(ims.mTmpRectF.right + 0.5),
4100                            (int)(ims.mTmpRectF.bottom + 0.5));
4101
4102                    imm.updateCursor(this,
4103                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4104                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4105                }
4106            }
4107        }
4108
4109        layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4110
4111        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4112            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4113            layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4114        }
4115
4116        /*  Comment out until we decide what to do about animations
4117        if (currentTransformation != null) {
4118            mTextPaint.setLinearTextOn(isLinearTextOn);
4119        }
4120        */
4121
4122        canvas.restore();
4123    }
4124
4125    /**
4126     * @hide
4127     */
4128    @Override
4129    public void onDrawOverlay(Canvas canvas) {
4130        if (mInsertionPointCursorController != null) {
4131            mInsertionPointCursorController.draw(canvas);
4132        }
4133        if (mSelectionModifierCursorController != null) {
4134            mSelectionModifierCursorController.draw(canvas);
4135        }
4136    }
4137
4138    @Override
4139    public void getFocusedRect(Rect r) {
4140        if (mLayout == null) {
4141            super.getFocusedRect(r);
4142            return;
4143        }
4144
4145        int sel = getSelectionEnd();
4146        if (sel < 0) {
4147            super.getFocusedRect(r);
4148            return;
4149        }
4150
4151        int line = mLayout.getLineForOffset(sel);
4152        r.top = mLayout.getLineTop(line);
4153        r.bottom = mLayout.getLineBottom(line);
4154
4155        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4156        r.right = r.left + 1;
4157
4158        // Adjust for padding and gravity.
4159        int paddingLeft = getCompoundPaddingLeft();
4160        int paddingTop = getExtendedPaddingTop();
4161        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4162            paddingTop += getVerticalOffset(false);
4163        }
4164        r.offset(paddingLeft, paddingTop);
4165    }
4166
4167    /**
4168     * Return the number of lines of text, or 0 if the internal Layout has not
4169     * been built.
4170     */
4171    public int getLineCount() {
4172        return mLayout != null ? mLayout.getLineCount() : 0;
4173    }
4174
4175    /**
4176     * Return the baseline for the specified line (0...getLineCount() - 1)
4177     * If bounds is not null, return the top, left, right, bottom extents
4178     * of the specified line in it. If the internal Layout has not been built,
4179     * return 0 and set bounds to (0, 0, 0, 0)
4180     * @param line which line to examine (0..getLineCount() - 1)
4181     * @param bounds Optional. If not null, it returns the extent of the line
4182     * @return the Y-coordinate of the baseline
4183     */
4184    public int getLineBounds(int line, Rect bounds) {
4185        if (mLayout == null) {
4186            if (bounds != null) {
4187                bounds.set(0, 0, 0, 0);
4188            }
4189            return 0;
4190        }
4191        else {
4192            int baseline = mLayout.getLineBounds(line, bounds);
4193
4194            int voffset = getExtendedPaddingTop();
4195            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4196                voffset += getVerticalOffset(true);
4197            }
4198            if (bounds != null) {
4199                bounds.offset(getCompoundPaddingLeft(), voffset);
4200            }
4201            return baseline + voffset;
4202        }
4203    }
4204
4205    @Override
4206    public int getBaseline() {
4207        if (mLayout == null) {
4208            return super.getBaseline();
4209        }
4210
4211        int voffset = 0;
4212        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4213            voffset = getVerticalOffset(true);
4214        }
4215
4216        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4217    }
4218
4219    @Override
4220    public boolean onKeyDown(int keyCode, KeyEvent event) {
4221        int which = doKeyDown(keyCode, event, null);
4222        if (which == 0) {
4223            // Go through default dispatching.
4224            return super.onKeyDown(keyCode, event);
4225        }
4226
4227        return true;
4228    }
4229
4230    @Override
4231    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4232        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4233
4234        int which = doKeyDown(keyCode, down, event);
4235        if (which == 0) {
4236            // Go through default dispatching.
4237            return super.onKeyMultiple(keyCode, repeatCount, event);
4238        }
4239        if (which == -1) {
4240            // Consumed the whole thing.
4241            return true;
4242        }
4243
4244        repeatCount--;
4245
4246        // We are going to dispatch the remaining events to either the input
4247        // or movement method.  To do this, we will just send a repeated stream
4248        // of down and up events until we have done the complete repeatCount.
4249        // It would be nice if those interfaces had an onKeyMultiple() method,
4250        // but adding that is a more complicated change.
4251        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4252        if (which == 1) {
4253            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4254            while (--repeatCount > 0) {
4255                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4256                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4257            }
4258            if (mError != null && !mErrorWasChanged) {
4259                setError(null, null);
4260            }
4261
4262        } else if (which == 2) {
4263            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4264            while (--repeatCount > 0) {
4265                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4266                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4267            }
4268        }
4269
4270        return true;
4271    }
4272
4273    /**
4274     * Returns true if pressing ENTER in this field advances focus instead
4275     * of inserting the character.  This is true mostly in single-line fields,
4276     * but also in mail addresses and subjects which will display on multiple
4277     * lines but where it doesn't make sense to insert newlines.
4278     */
4279    private boolean shouldAdvanceFocusOnEnter() {
4280        if (mInput == null) {
4281            return false;
4282        }
4283
4284        if (mSingleLine) {
4285            return true;
4286        }
4287
4288        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4289            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4290
4291            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
4292                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4293                return true;
4294            }
4295        }
4296
4297        return false;
4298    }
4299
4300    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4301        if (!isEnabled()) {
4302            return 0;
4303        }
4304
4305        switch (keyCode) {
4306            case KeyEvent.KEYCODE_ENTER:
4307                // If ALT modifier is held, then we always insert a
4308                // newline character.
4309                if ((event.getMetaState()&KeyEvent.META_ALT_ON) == 0) {
4310
4311                    // When mInputContentType is set, we know that we are
4312                    // running in a "modern" cupcake environment, so don't need
4313                    // to worry about the application trying to capture
4314                    // enter key events.
4315                    if (mInputContentType != null) {
4316
4317                        // If there is an action listener, given them a
4318                        // chance to consume the event.
4319                        if (mInputContentType.onEditorActionListener != null &&
4320                                mInputContentType.onEditorActionListener.onEditorAction(
4321                                this, EditorInfo.IME_NULL, event)) {
4322                            mInputContentType.enterDown = true;
4323                            // We are consuming the enter key for them.
4324                            return -1;
4325                        }
4326                    }
4327
4328                    // If our editor should move focus when enter is pressed, or
4329                    // this is a generated event from an IME action button, then
4330                    // don't let it be inserted into the text.
4331                    if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4332                            || shouldAdvanceFocusOnEnter()) {
4333                        return -1;
4334                    }
4335                }
4336                break;
4337
4338            case KeyEvent.KEYCODE_DPAD_CENTER:
4339                if (shouldAdvanceFocusOnEnter()) {
4340                    return 0;
4341                }
4342                break;
4343
4344                // Has to be done on key down (and not on key up) to correctly be intercepted.
4345            case KeyEvent.KEYCODE_BACK:
4346                if (mIsInTextSelectionMode) {
4347                    stopTextSelectionMode();
4348                    return -1;
4349                }
4350                break;
4351        }
4352
4353        if (mInput != null) {
4354            /*
4355             * Keep track of what the error was before doing the input
4356             * so that if an input filter changed the error, we leave
4357             * that error showing.  Otherwise, we take down whatever
4358             * error was showing when the user types something.
4359             */
4360            mErrorWasChanged = false;
4361
4362            boolean doDown = true;
4363            if (otherEvent != null) {
4364                try {
4365                    beginBatchEdit();
4366                    boolean handled = mInput.onKeyOther(this, (Editable) mText,
4367                            otherEvent);
4368                    if (mError != null && !mErrorWasChanged) {
4369                        setError(null, null);
4370                    }
4371                    doDown = false;
4372                    if (handled) {
4373                        return -1;
4374                    }
4375                } catch (AbstractMethodError e) {
4376                    // onKeyOther was added after 1.0, so if it isn't
4377                    // implemented we need to try to dispatch as a regular down.
4378                } finally {
4379                    endBatchEdit();
4380                }
4381            }
4382
4383            if (doDown) {
4384                beginBatchEdit();
4385                if (mInput.onKeyDown(this, (Editable) mText, keyCode, event)) {
4386                    endBatchEdit();
4387                    if (mError != null && !mErrorWasChanged) {
4388                        setError(null, null);
4389                    }
4390                    return 1;
4391                }
4392                endBatchEdit();
4393            }
4394        }
4395
4396        // bug 650865: sometimes we get a key event before a layout.
4397        // don't try to move around if we don't know the layout.
4398
4399        if (mMovement != null && mLayout != null) {
4400            boolean doDown = true;
4401            if (otherEvent != null) {
4402                try {
4403                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4404                            otherEvent);
4405                    doDown = false;
4406                    if (handled) {
4407                        return -1;
4408                    }
4409                } catch (AbstractMethodError e) {
4410                    // onKeyOther was added after 1.0, so if it isn't
4411                    // implemented we need to try to dispatch as a regular down.
4412                }
4413            }
4414            if (doDown) {
4415                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4416                    return 2;
4417            }
4418        }
4419
4420        return 0;
4421    }
4422
4423    @Override
4424    public boolean onKeyUp(int keyCode, KeyEvent event) {
4425        if (!isEnabled()) {
4426            return super.onKeyUp(keyCode, event);
4427        }
4428
4429        hideControllers();
4430
4431        switch (keyCode) {
4432            case KeyEvent.KEYCODE_DPAD_CENTER:
4433                /*
4434                 * If there is a click listener, just call through to
4435                 * super, which will invoke it.
4436                 *
4437                 * If there isn't a click listener, try to show the soft
4438                 * input method.  (It will also
4439                 * call performClick(), but that won't do anything in
4440                 * this case.)
4441                 */
4442                if (mOnClickListener == null) {
4443                    if (mMovement != null && mText instanceof Editable
4444                            && mLayout != null && onCheckIsTextEditor()) {
4445                        InputMethodManager imm = (InputMethodManager)
4446                                getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
4447                        imm.showSoftInput(this, 0);
4448                    }
4449                }
4450                return super.onKeyUp(keyCode, event);
4451
4452            case KeyEvent.KEYCODE_ENTER:
4453                if (mInputContentType != null
4454                        && mInputContentType.onEditorActionListener != null
4455                        && mInputContentType.enterDown) {
4456                    mInputContentType.enterDown = false;
4457                    if (mInputContentType.onEditorActionListener.onEditorAction(
4458                            this, EditorInfo.IME_NULL, event)) {
4459                        return true;
4460                    }
4461                }
4462
4463                if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4464                        || shouldAdvanceFocusOnEnter()) {
4465                    /*
4466                     * If there is a click listener, just call through to
4467                     * super, which will invoke it.
4468                     *
4469                     * If there isn't a click listener, try to advance focus,
4470                     * but still call through to super, which will reset the
4471                     * pressed state and longpress state.  (It will also
4472                     * call performClick(), but that won't do anything in
4473                     * this case.)
4474                     */
4475                    if (mOnClickListener == null) {
4476                        View v = focusSearch(FOCUS_DOWN);
4477
4478                        if (v != null) {
4479                            if (!v.requestFocus(FOCUS_DOWN)) {
4480                                throw new IllegalStateException("focus search returned a view " +
4481                                        "that wasn't able to take focus!");
4482                            }
4483
4484                            /*
4485                             * Return true because we handled the key; super
4486                             * will return false because there was no click
4487                             * listener.
4488                             */
4489                            super.onKeyUp(keyCode, event);
4490                            return true;
4491                        } else if ((event.getFlags()
4492                                & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4493                            // No target for next focus, but make sure the IME
4494                            // if this came from it.
4495                            InputMethodManager imm = InputMethodManager.peekInstance();
4496                            if (imm != null) {
4497                                imm.hideSoftInputFromWindow(getWindowToken(), 0);
4498                            }
4499                        }
4500                    }
4501
4502                    return super.onKeyUp(keyCode, event);
4503                }
4504                break;
4505        }
4506
4507        if (mInput != null)
4508            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4509                return true;
4510
4511        if (mMovement != null && mLayout != null)
4512            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4513                return true;
4514
4515        return super.onKeyUp(keyCode, event);
4516    }
4517
4518    @Override public boolean onCheckIsTextEditor() {
4519        return mInputType != EditorInfo.TYPE_NULL;
4520    }
4521
4522    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4523        if (onCheckIsTextEditor()) {
4524            if (mInputMethodState == null) {
4525                mInputMethodState = new InputMethodState();
4526            }
4527            outAttrs.inputType = mInputType;
4528            if (mInputContentType != null) {
4529                outAttrs.imeOptions = mInputContentType.imeOptions;
4530                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4531                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4532                outAttrs.actionId = mInputContentType.imeActionId;
4533                outAttrs.extras = mInputContentType.extras;
4534            } else {
4535                outAttrs.imeOptions = EditorInfo.IME_NULL;
4536            }
4537            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4538                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4539                if (focusSearch(FOCUS_DOWN) != null) {
4540                    // An action has not been set, but the enter key will move to
4541                    // the next focus, so set the action to that.
4542                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4543                } else {
4544                    // An action has not been set, and there is no focus to move
4545                    // to, so let's just supply a "done" action.
4546                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4547                }
4548                if (!shouldAdvanceFocusOnEnter()) {
4549                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4550                }
4551            }
4552            if ((outAttrs.inputType & (InputType.TYPE_MASK_CLASS
4553                    | InputType.TYPE_TEXT_FLAG_MULTI_LINE))
4554                    == (InputType.TYPE_CLASS_TEXT
4555                            | InputType.TYPE_TEXT_FLAG_MULTI_LINE)) {
4556                // Multi-line text editors should always show an enter key.
4557                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4558            }
4559            outAttrs.hintText = mHint;
4560            if (mText instanceof Editable) {
4561                InputConnection ic = new EditableInputConnection(this);
4562                outAttrs.initialSelStart = getSelectionStart();
4563                outAttrs.initialSelEnd = getSelectionEnd();
4564                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4565                return ic;
4566            }
4567        }
4568        return null;
4569    }
4570
4571    /**
4572     * If this TextView contains editable content, extract a portion of it
4573     * based on the information in <var>request</var> in to <var>outText</var>.
4574     * @return Returns true if the text was successfully extracted, else false.
4575     */
4576    public boolean extractText(ExtractedTextRequest request,
4577            ExtractedText outText) {
4578        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4579                EXTRACT_UNKNOWN, outText);
4580    }
4581
4582    static final int EXTRACT_NOTHING = -2;
4583    static final int EXTRACT_UNKNOWN = -1;
4584
4585    boolean extractTextInternal(ExtractedTextRequest request,
4586            int partialStartOffset, int partialEndOffset, int delta,
4587            ExtractedText outText) {
4588        final CharSequence content = mText;
4589        if (content != null) {
4590            if (partialStartOffset != EXTRACT_NOTHING) {
4591                final int N = content.length();
4592                if (partialStartOffset < 0) {
4593                    outText.partialStartOffset = outText.partialEndOffset = -1;
4594                    partialStartOffset = 0;
4595                    partialEndOffset = N;
4596                } else {
4597                    // Adjust offsets to ensure we contain full spans.
4598                    if (content instanceof Spanned) {
4599                        Spanned spanned = (Spanned)content;
4600                        Object[] spans = spanned.getSpans(partialStartOffset,
4601                                partialEndOffset, ParcelableSpan.class);
4602                        int i = spans.length;
4603                        while (i > 0) {
4604                            i--;
4605                            int j = spanned.getSpanStart(spans[i]);
4606                            if (j < partialStartOffset) partialStartOffset = j;
4607                            j = spanned.getSpanEnd(spans[i]);
4608                            if (j > partialEndOffset) partialEndOffset = j;
4609                        }
4610                    }
4611                    outText.partialStartOffset = partialStartOffset;
4612                    outText.partialEndOffset = partialEndOffset;
4613                    // Now use the delta to determine the actual amount of text
4614                    // we need.
4615                    partialEndOffset += delta;
4616                    if (partialStartOffset > N) {
4617                        partialStartOffset = N;
4618                    } else if (partialStartOffset < 0) {
4619                        partialStartOffset = 0;
4620                    }
4621                    if (partialEndOffset > N) {
4622                        partialEndOffset = N;
4623                    } else if (partialEndOffset < 0) {
4624                        partialEndOffset = 0;
4625                    }
4626                }
4627                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
4628                    outText.text = content.subSequence(partialStartOffset,
4629                            partialEndOffset);
4630                } else {
4631                    outText.text = TextUtils.substring(content, partialStartOffset,
4632                            partialEndOffset);
4633                }
4634            } else {
4635                outText.partialStartOffset = 0;
4636                outText.partialEndOffset = 0;
4637                outText.text = "";
4638            }
4639            outText.flags = 0;
4640            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
4641                outText.flags |= ExtractedText.FLAG_SELECTING;
4642            }
4643            if (mSingleLine) {
4644                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
4645            }
4646            outText.startOffset = 0;
4647            outText.selectionStart = getSelectionStart();
4648            outText.selectionEnd = getSelectionEnd();
4649            return true;
4650        }
4651        return false;
4652    }
4653
4654    boolean reportExtractedText() {
4655        final InputMethodState ims = mInputMethodState;
4656        if (ims != null) {
4657            final boolean contentChanged = ims.mContentChanged;
4658            if (contentChanged || ims.mSelectionModeChanged) {
4659                ims.mContentChanged = false;
4660                ims.mSelectionModeChanged = false;
4661                final ExtractedTextRequest req = mInputMethodState.mExtracting;
4662                if (req != null) {
4663                    InputMethodManager imm = InputMethodManager.peekInstance();
4664                    if (imm != null) {
4665                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
4666                                + ims.mChangedStart + " end=" + ims.mChangedEnd
4667                                + " delta=" + ims.mChangedDelta);
4668                        if (ims.mChangedStart < 0 && !contentChanged) {
4669                            ims.mChangedStart = EXTRACT_NOTHING;
4670                        }
4671                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
4672                                ims.mChangedDelta, ims.mTmpExtracted)) {
4673                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
4674                                    + ims.mTmpExtracted.partialStartOffset
4675                                    + " end=" + ims.mTmpExtracted.partialEndOffset
4676                                    + ": " + ims.mTmpExtracted.text);
4677                            imm.updateExtractedText(this, req.token,
4678                                    mInputMethodState.mTmpExtracted);
4679                            return true;
4680                        }
4681                    }
4682                }
4683            }
4684        }
4685        return false;
4686    }
4687
4688    /**
4689     * This is used to remove all style-impacting spans from text before new
4690     * extracted text is being replaced into it, so that we don't have any
4691     * lingering spans applied during the replace.
4692     */
4693    static void removeParcelableSpans(Spannable spannable, int start, int end) {
4694        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
4695        int i = spans.length;
4696        while (i > 0) {
4697            i--;
4698            spannable.removeSpan(spans[i]);
4699        }
4700    }
4701
4702    /**
4703     * Apply to this text view the given extracted text, as previously
4704     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
4705     */
4706    public void setExtractedText(ExtractedText text) {
4707        Editable content = getEditableText();
4708        if (text.text != null) {
4709            if (content == null) {
4710                setText(text.text, TextView.BufferType.EDITABLE);
4711            } else if (text.partialStartOffset < 0) {
4712                removeParcelableSpans(content, 0, content.length());
4713                content.replace(0, content.length(), text.text);
4714            } else {
4715                final int N = content.length();
4716                int start = text.partialStartOffset;
4717                if (start > N) start = N;
4718                int end = text.partialEndOffset;
4719                if (end > N) end = N;
4720                removeParcelableSpans(content, start, end);
4721                content.replace(start, end, text.text);
4722            }
4723        }
4724
4725        // Now set the selection position...  make sure it is in range, to
4726        // avoid crashes.  If this is a partial update, it is possible that
4727        // the underlying text may have changed, causing us problems here.
4728        // Also we just don't want to trust clients to do the right thing.
4729        Spannable sp = (Spannable)getText();
4730        final int N = sp.length();
4731        int start = text.selectionStart;
4732        if (start < 0) start = 0;
4733        else if (start > N) start = N;
4734        int end = text.selectionEnd;
4735        if (end < 0) end = 0;
4736        else if (end > N) end = N;
4737        Selection.setSelection(sp, start, end);
4738
4739        // Finally, update the selection mode.
4740        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
4741            MetaKeyKeyListener.startSelecting(this, sp);
4742        } else {
4743            MetaKeyKeyListener.stopSelecting(this, sp);
4744        }
4745    }
4746
4747    /**
4748     * @hide
4749     */
4750    public void setExtracting(ExtractedTextRequest req) {
4751        if (mInputMethodState != null) {
4752            mInputMethodState.mExtracting = req;
4753        }
4754    }
4755
4756    /**
4757     * Called by the framework in response to a text completion from
4758     * the current input method, provided by it calling
4759     * {@link InputConnection#commitCompletion
4760     * InputConnection.commitCompletion()}.  The default implementation does
4761     * nothing; text views that are supporting auto-completion should override
4762     * this to do their desired behavior.
4763     *
4764     * @param text The auto complete text the user has selected.
4765     */
4766    public void onCommitCompletion(CompletionInfo text) {
4767    }
4768
4769    public void beginBatchEdit() {
4770        final InputMethodState ims = mInputMethodState;
4771        if (ims != null) {
4772            int nesting = ++ims.mBatchEditNesting;
4773            if (nesting == 1) {
4774                ims.mCursorChanged = false;
4775                ims.mChangedDelta = 0;
4776                if (ims.mContentChanged) {
4777                    // We already have a pending change from somewhere else,
4778                    // so turn this into a full update.
4779                    ims.mChangedStart = 0;
4780                    ims.mChangedEnd = mText.length();
4781                } else {
4782                    ims.mChangedStart = EXTRACT_UNKNOWN;
4783                    ims.mChangedEnd = EXTRACT_UNKNOWN;
4784                    ims.mContentChanged = false;
4785                }
4786                onBeginBatchEdit();
4787            }
4788        }
4789    }
4790
4791    public void endBatchEdit() {
4792        final InputMethodState ims = mInputMethodState;
4793        if (ims != null) {
4794            int nesting = --ims.mBatchEditNesting;
4795            if (nesting == 0) {
4796                finishBatchEdit(ims);
4797            }
4798        }
4799    }
4800
4801    void ensureEndedBatchEdit() {
4802        final InputMethodState ims = mInputMethodState;
4803        if (ims != null && ims.mBatchEditNesting != 0) {
4804            ims.mBatchEditNesting = 0;
4805            finishBatchEdit(ims);
4806        }
4807    }
4808
4809    void finishBatchEdit(final InputMethodState ims) {
4810        onEndBatchEdit();
4811
4812        if (ims.mContentChanged || ims.mSelectionModeChanged) {
4813            updateAfterEdit();
4814            reportExtractedText();
4815        } else if (ims.mCursorChanged) {
4816            // Cheezy way to get us to report the current cursor location.
4817            invalidateCursor();
4818        }
4819    }
4820
4821    void updateAfterEdit() {
4822        invalidate();
4823        int curs = getSelectionStart();
4824
4825        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
4826                             Gravity.BOTTOM) {
4827            registerForPreDraw();
4828        }
4829
4830        if (curs >= 0) {
4831            mHighlightPathBogus = true;
4832
4833            if (isFocused()) {
4834                mShowCursor = SystemClock.uptimeMillis();
4835                makeBlink();
4836            }
4837        }
4838
4839        checkForResize();
4840    }
4841
4842    /**
4843     * Called by the framework in response to a request to begin a batch
4844     * of edit operations through a call to link {@link #beginBatchEdit()}.
4845     */
4846    public void onBeginBatchEdit() {
4847    }
4848
4849    /**
4850     * Called by the framework in response to a request to end a batch
4851     * of edit operations through a call to link {@link #endBatchEdit}.
4852     */
4853    public void onEndBatchEdit() {
4854    }
4855
4856    /**
4857     * Called by the framework in response to a private command from the
4858     * current method, provided by it calling
4859     * {@link InputConnection#performPrivateCommand
4860     * InputConnection.performPrivateCommand()}.
4861     *
4862     * @param action The action name of the command.
4863     * @param data Any additional data for the command.  This may be null.
4864     * @return Return true if you handled the command, else false.
4865     */
4866    public boolean onPrivateIMECommand(String action, Bundle data) {
4867        return false;
4868    }
4869
4870    private void nullLayouts() {
4871        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
4872            mSavedLayout = (BoringLayout) mLayout;
4873        }
4874        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
4875            mSavedHintLayout = (BoringLayout) mHintLayout;
4876        }
4877
4878        mLayout = mHintLayout = null;
4879    }
4880
4881    /**
4882     * Make a new Layout based on the already-measured size of the view,
4883     * on the assumption that it was measured correctly at some point.
4884     */
4885    private void assumeLayout() {
4886        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
4887
4888        if (width < 1) {
4889            width = 0;
4890        }
4891
4892        int physicalWidth = width;
4893
4894        if (mHorizontallyScrolling) {
4895            width = VERY_WIDE;
4896        }
4897
4898        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
4899                      physicalWidth, false);
4900    }
4901
4902    /**
4903     * The width passed in is now the desired layout width,
4904     * not the full view width with padding.
4905     * {@hide}
4906     */
4907    protected void makeNewLayout(int w, int hintWidth,
4908                                 BoringLayout.Metrics boring,
4909                                 BoringLayout.Metrics hintBoring,
4910                                 int ellipsisWidth, boolean bringIntoView) {
4911        stopMarquee();
4912
4913        mHighlightPathBogus = true;
4914
4915        if (w < 0) {
4916            w = 0;
4917        }
4918        if (hintWidth < 0) {
4919            hintWidth = 0;
4920        }
4921
4922        Layout.Alignment alignment;
4923        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
4924            case Gravity.CENTER_HORIZONTAL:
4925                alignment = Layout.Alignment.ALIGN_CENTER;
4926                break;
4927
4928            case Gravity.RIGHT:
4929                alignment = Layout.Alignment.ALIGN_OPPOSITE;
4930                break;
4931
4932            default:
4933                alignment = Layout.Alignment.ALIGN_NORMAL;
4934        }
4935
4936        boolean shouldEllipsize = mEllipsize != null && mInput == null;
4937
4938        if (mText instanceof Spannable) {
4939            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
4940                    alignment, mSpacingMult,
4941                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
4942                    ellipsisWidth);
4943        } else {
4944            if (boring == UNKNOWN_BORING) {
4945                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
4946                                               mBoring);
4947                if (boring != null) {
4948                    mBoring = boring;
4949                }
4950            }
4951
4952            if (boring != null) {
4953                if (boring.width <= w &&
4954                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
4955                    if (mSavedLayout != null) {
4956                        mLayout = mSavedLayout.
4957                                replaceOrMake(mTransformed, mTextPaint,
4958                                w, alignment, mSpacingMult, mSpacingAdd,
4959                                boring, mIncludePad);
4960                    } else {
4961                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4962                                w, alignment, mSpacingMult, mSpacingAdd,
4963                                boring, mIncludePad);
4964                    }
4965
4966                    mSavedLayout = (BoringLayout) mLayout;
4967                } else if (shouldEllipsize && boring.width <= w) {
4968                    if (mSavedLayout != null) {
4969                        mLayout = mSavedLayout.
4970                                replaceOrMake(mTransformed, mTextPaint,
4971                                w, alignment, mSpacingMult, mSpacingAdd,
4972                                boring, mIncludePad, mEllipsize,
4973                                ellipsisWidth);
4974                    } else {
4975                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4976                                w, alignment, mSpacingMult, mSpacingAdd,
4977                                boring, mIncludePad, mEllipsize,
4978                                ellipsisWidth);
4979                    }
4980                } else if (shouldEllipsize) {
4981                    mLayout = new StaticLayout(mTransformed,
4982                                0, mTransformed.length(),
4983                                mTextPaint, w, alignment, mSpacingMult,
4984                                mSpacingAdd, mIncludePad, mEllipsize,
4985                                ellipsisWidth);
4986                } else {
4987                    mLayout = new StaticLayout(mTransformed, mTextPaint,
4988                            w, alignment, mSpacingMult, mSpacingAdd,
4989                            mIncludePad);
4990                }
4991            } else if (shouldEllipsize) {
4992                mLayout = new StaticLayout(mTransformed,
4993                            0, mTransformed.length(),
4994                            mTextPaint, w, alignment, mSpacingMult,
4995                            mSpacingAdd, mIncludePad, mEllipsize,
4996                            ellipsisWidth);
4997            } else {
4998                mLayout = new StaticLayout(mTransformed, mTextPaint,
4999                        w, alignment, mSpacingMult, mSpacingAdd,
5000                        mIncludePad);
5001            }
5002        }
5003
5004        shouldEllipsize = mEllipsize != null;
5005        mHintLayout = null;
5006
5007        if (mHint != null) {
5008            if (shouldEllipsize) hintWidth = w;
5009
5010            if (hintBoring == UNKNOWN_BORING) {
5011                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5012                                                   mHintBoring);
5013                if (hintBoring != null) {
5014                    mHintBoring = hintBoring;
5015                }
5016            }
5017
5018            if (hintBoring != null) {
5019                if (hintBoring.width <= hintWidth &&
5020                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5021                    if (mSavedHintLayout != null) {
5022                        mHintLayout = mSavedHintLayout.
5023                                replaceOrMake(mHint, mTextPaint,
5024                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5025                                hintBoring, mIncludePad);
5026                    } else {
5027                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5028                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5029                                hintBoring, mIncludePad);
5030                    }
5031
5032                    mSavedHintLayout = (BoringLayout) mHintLayout;
5033                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5034                    if (mSavedHintLayout != null) {
5035                        mHintLayout = mSavedHintLayout.
5036                                replaceOrMake(mHint, mTextPaint,
5037                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5038                                hintBoring, mIncludePad, mEllipsize,
5039                                ellipsisWidth);
5040                    } else {
5041                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5042                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5043                                hintBoring, mIncludePad, mEllipsize,
5044                                ellipsisWidth);
5045                    }
5046                } else if (shouldEllipsize) {
5047                    mHintLayout = new StaticLayout(mHint,
5048                                0, mHint.length(),
5049                                mTextPaint, hintWidth, alignment, mSpacingMult,
5050                                mSpacingAdd, mIncludePad, mEllipsize,
5051                                ellipsisWidth);
5052                } else {
5053                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5054                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5055                            mIncludePad);
5056                }
5057            } else if (shouldEllipsize) {
5058                mHintLayout = new StaticLayout(mHint,
5059                            0, mHint.length(),
5060                            mTextPaint, hintWidth, alignment, mSpacingMult,
5061                            mSpacingAdd, mIncludePad, mEllipsize,
5062                            ellipsisWidth);
5063            } else {
5064                mHintLayout = new StaticLayout(mHint, mTextPaint,
5065                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5066                        mIncludePad);
5067            }
5068        }
5069
5070        if (bringIntoView) {
5071            registerForPreDraw();
5072        }
5073
5074        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5075            if (!compressText(ellipsisWidth)) {
5076                final int height = mLayoutParams.height;
5077                // If the size of the view does not depend on the size of the text, try to
5078                // start the marquee immediately
5079                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5080                    startMarquee();
5081                } else {
5082                    // Defer the start of the marquee until we know our width (see setFrame())
5083                    mRestartMarquee = true;
5084                }
5085            }
5086        }
5087
5088        // CursorControllers need a non-null mLayout
5089        prepareCursorControllers();
5090    }
5091
5092    private boolean compressText(float width) {
5093        // Only compress the text if it hasn't been compressed by the previous pass
5094        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5095                mTextPaint.getTextScaleX() == 1.0f) {
5096            final float textWidth = mLayout.getLineWidth(0);
5097            final float overflow = (textWidth + 1.0f - width) / width;
5098            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5099                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5100                post(new Runnable() {
5101                    public void run() {
5102                        requestLayout();
5103                    }
5104                });
5105                return true;
5106            }
5107        }
5108
5109        return false;
5110    }
5111
5112    private static int desired(Layout layout) {
5113        int n = layout.getLineCount();
5114        CharSequence text = layout.getText();
5115        float max = 0;
5116
5117        // if any line was wrapped, we can't use it.
5118        // but it's ok for the last line not to have a newline
5119
5120        for (int i = 0; i < n - 1; i++) {
5121            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5122                return -1;
5123        }
5124
5125        for (int i = 0; i < n; i++) {
5126            max = Math.max(max, layout.getLineWidth(i));
5127        }
5128
5129        return (int) FloatMath.ceil(max);
5130    }
5131
5132    /**
5133     * Set whether the TextView includes extra top and bottom padding to make
5134     * room for accents that go above the normal ascent and descent.
5135     * The default is true.
5136     *
5137     * @attr ref android.R.styleable#TextView_includeFontPadding
5138     */
5139    public void setIncludeFontPadding(boolean includepad) {
5140        mIncludePad = includepad;
5141
5142        if (mLayout != null) {
5143            nullLayouts();
5144            requestLayout();
5145            invalidate();
5146        }
5147    }
5148
5149    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5150
5151    @Override
5152    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5153        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5154        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5155        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5156        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5157
5158        int width;
5159        int height;
5160
5161        BoringLayout.Metrics boring = UNKNOWN_BORING;
5162        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5163
5164        int des = -1;
5165        boolean fromexisting = false;
5166
5167        if (widthMode == MeasureSpec.EXACTLY) {
5168            // Parent has told us how big to be. So be it.
5169            width = widthSize;
5170        } else {
5171            if (mLayout != null && mEllipsize == null) {
5172                des = desired(mLayout);
5173            }
5174
5175            if (des < 0) {
5176                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5177                if (boring != null) {
5178                    mBoring = boring;
5179                }
5180            } else {
5181                fromexisting = true;
5182            }
5183
5184            if (boring == null || boring == UNKNOWN_BORING) {
5185                if (des < 0) {
5186                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5187                }
5188
5189                width = des;
5190            } else {
5191                width = boring.width;
5192            }
5193
5194            final Drawables dr = mDrawables;
5195            if (dr != null) {
5196                width = Math.max(width, dr.mDrawableWidthTop);
5197                width = Math.max(width, dr.mDrawableWidthBottom);
5198            }
5199
5200            if (mHint != null) {
5201                int hintDes = -1;
5202                int hintWidth;
5203
5204                if (mHintLayout != null && mEllipsize == null) {
5205                    hintDes = desired(mHintLayout);
5206                }
5207
5208                if (hintDes < 0) {
5209                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5210                    if (hintBoring != null) {
5211                        mHintBoring = hintBoring;
5212                    }
5213                }
5214
5215                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5216                    if (hintDes < 0) {
5217                        hintDes = (int) FloatMath.ceil(
5218                                Layout.getDesiredWidth(mHint, mTextPaint));
5219                    }
5220
5221                    hintWidth = hintDes;
5222                } else {
5223                    hintWidth = hintBoring.width;
5224                }
5225
5226                if (hintWidth > width) {
5227                    width = hintWidth;
5228                }
5229            }
5230
5231            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5232
5233            if (mMaxWidthMode == EMS) {
5234                width = Math.min(width, mMaxWidth * getLineHeight());
5235            } else {
5236                width = Math.min(width, mMaxWidth);
5237            }
5238
5239            if (mMinWidthMode == EMS) {
5240                width = Math.max(width, mMinWidth * getLineHeight());
5241            } else {
5242                width = Math.max(width, mMinWidth);
5243            }
5244
5245            // Check against our minimum width
5246            width = Math.max(width, getSuggestedMinimumWidth());
5247
5248            if (widthMode == MeasureSpec.AT_MOST) {
5249                width = Math.min(widthSize, width);
5250            }
5251        }
5252
5253        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5254        int unpaddedWidth = want;
5255        int hintWant = want;
5256
5257        if (mHorizontallyScrolling)
5258            want = VERY_WIDE;
5259
5260        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5261
5262        if (mLayout == null) {
5263            makeNewLayout(want, hintWant, boring, hintBoring,
5264                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5265        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5266                   (mLayout.getEllipsizedWidth() !=
5267                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5268            if (mHint == null && mEllipsize == null &&
5269                    want > mLayout.getWidth() &&
5270                    (mLayout instanceof BoringLayout ||
5271                            (fromexisting && des >= 0 && des <= want))) {
5272                mLayout.increaseWidthTo(want);
5273            } else {
5274                makeNewLayout(want, hintWant, boring, hintBoring,
5275                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5276            }
5277        } else {
5278            // Width has not changed.
5279        }
5280
5281        if (heightMode == MeasureSpec.EXACTLY) {
5282            // Parent has told us how big to be. So be it.
5283            height = heightSize;
5284            mDesiredHeightAtMeasure = -1;
5285        } else {
5286            int desired = getDesiredHeight();
5287
5288            height = desired;
5289            mDesiredHeightAtMeasure = desired;
5290
5291            if (heightMode == MeasureSpec.AT_MOST) {
5292                height = Math.min(desired, heightSize);
5293            }
5294        }
5295
5296        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5297        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5298            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5299        }
5300
5301        /*
5302         * We didn't let makeNewLayout() register to bring the cursor into view,
5303         * so do it here if there is any possibility that it is needed.
5304         */
5305        if (mMovement != null ||
5306            mLayout.getWidth() > unpaddedWidth ||
5307            mLayout.getHeight() > unpaddedHeight) {
5308            registerForPreDraw();
5309        } else {
5310            scrollTo(0, 0);
5311        }
5312
5313        setMeasuredDimension(width, height);
5314    }
5315
5316    private int getDesiredHeight() {
5317        return Math.max(
5318                getDesiredHeight(mLayout, true),
5319                getDesiredHeight(mHintLayout, mEllipsize != null));
5320    }
5321
5322    private int getDesiredHeight(Layout layout, boolean cap) {
5323        if (layout == null) {
5324            return 0;
5325        }
5326
5327        int linecount = layout.getLineCount();
5328        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5329        int desired = layout.getLineTop(linecount);
5330
5331        final Drawables dr = mDrawables;
5332        if (dr != null) {
5333            desired = Math.max(desired, dr.mDrawableHeightLeft);
5334            desired = Math.max(desired, dr.mDrawableHeightRight);
5335        }
5336
5337        desired += pad;
5338
5339        if (mMaxMode == LINES) {
5340            /*
5341             * Don't cap the hint to a certain number of lines.
5342             * (Do cap it, though, if we have a maximum pixel height.)
5343             */
5344            if (cap) {
5345                if (linecount > mMaximum) {
5346                    desired = layout.getLineTop(mMaximum) +
5347                              layout.getBottomPadding();
5348
5349                    if (dr != null) {
5350                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5351                        desired = Math.max(desired, dr.mDrawableHeightRight);
5352                    }
5353
5354                    desired += pad;
5355                    linecount = mMaximum;
5356                }
5357            }
5358        } else {
5359            desired = Math.min(desired, mMaximum);
5360        }
5361
5362        if (mMinMode == LINES) {
5363            if (linecount < mMinimum) {
5364                desired += getLineHeight() * (mMinimum - linecount);
5365            }
5366        } else {
5367            desired = Math.max(desired, mMinimum);
5368        }
5369
5370        // Check against our minimum height
5371        desired = Math.max(desired, getSuggestedMinimumHeight());
5372
5373        return desired;
5374    }
5375
5376    /**
5377     * Check whether a change to the existing text layout requires a
5378     * new view layout.
5379     */
5380    private void checkForResize() {
5381        boolean sizeChanged = false;
5382
5383        if (mLayout != null) {
5384            // Check if our width changed
5385            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5386                sizeChanged = true;
5387                invalidate();
5388            }
5389
5390            // Check if our height changed
5391            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5392                int desiredHeight = getDesiredHeight();
5393
5394                if (desiredHeight != this.getHeight()) {
5395                    sizeChanged = true;
5396                }
5397            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5398                if (mDesiredHeightAtMeasure >= 0) {
5399                    int desiredHeight = getDesiredHeight();
5400
5401                    if (desiredHeight != mDesiredHeightAtMeasure) {
5402                        sizeChanged = true;
5403                    }
5404                }
5405            }
5406        }
5407
5408        if (sizeChanged) {
5409            requestLayout();
5410            // caller will have already invalidated
5411        }
5412    }
5413
5414    /**
5415     * Check whether entirely new text requires a new view layout
5416     * or merely a new text layout.
5417     */
5418    private void checkForRelayout() {
5419        // If we have a fixed width, we can just swap in a new text layout
5420        // if the text height stays the same or if the view height is fixed.
5421
5422        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5423                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5424                (mHint == null || mHintLayout != null) &&
5425                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5426            // Static width, so try making a new text layout.
5427
5428            int oldht = mLayout.getHeight();
5429            int want = mLayout.getWidth();
5430            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5431
5432            /*
5433             * No need to bring the text into view, since the size is not
5434             * changing (unless we do the requestLayout(), in which case it
5435             * will happen at measure).
5436             */
5437            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5438                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5439                          false);
5440
5441            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5442                // In a fixed-height view, so use our new text layout.
5443                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5444                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5445                    invalidate();
5446                    return;
5447                }
5448
5449                // Dynamic height, but height has stayed the same,
5450                // so use our new text layout.
5451                if (mLayout.getHeight() == oldht &&
5452                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5453                    invalidate();
5454                    return;
5455                }
5456            }
5457
5458            // We lose: the height has changed and we have a dynamic height.
5459            // Request a new view layout using our new text layout.
5460            requestLayout();
5461            invalidate();
5462        } else {
5463            // Dynamic width, so we have no choice but to request a new
5464            // view layout with a new text layout.
5465
5466            nullLayouts();
5467            requestLayout();
5468            invalidate();
5469        }
5470    }
5471
5472    /**
5473     * Returns true if anything changed.
5474     */
5475    private boolean bringTextIntoView() {
5476        int line = 0;
5477        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5478            line = mLayout.getLineCount() - 1;
5479        }
5480
5481        Layout.Alignment a = mLayout.getParagraphAlignment(line);
5482        int dir = mLayout.getParagraphDirection(line);
5483        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5484        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5485        int ht = mLayout.getHeight();
5486
5487        int scrollx, scrolly;
5488
5489        if (a == Layout.Alignment.ALIGN_CENTER) {
5490            /*
5491             * Keep centered if possible, or, if it is too wide to fit,
5492             * keep leading edge in view.
5493             */
5494
5495            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5496            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5497
5498            if (right - left < hspace) {
5499                scrollx = (right + left) / 2 - hspace / 2;
5500            } else {
5501                if (dir < 0) {
5502                    scrollx = right - hspace;
5503                } else {
5504                    scrollx = left;
5505                }
5506            }
5507        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
5508            /*
5509             * Keep leading edge in view.
5510             */
5511
5512            if (dir < 0) {
5513                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5514                scrollx = right - hspace;
5515            } else {
5516                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5517            }
5518        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
5519            /*
5520             * Keep trailing edge in view.
5521             */
5522
5523            if (dir < 0) {
5524                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5525            } else {
5526                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5527                scrollx = right - hspace;
5528            }
5529        }
5530
5531        if (ht < vspace) {
5532            scrolly = 0;
5533        } else {
5534            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5535                scrolly = ht - vspace;
5536            } else {
5537                scrolly = 0;
5538            }
5539        }
5540
5541        if (scrollx != mScrollX || scrolly != mScrollY) {
5542            scrollTo(scrollx, scrolly);
5543            return true;
5544        } else {
5545            return false;
5546        }
5547    }
5548
5549    /**
5550     * Move the point, specified by the offset, into the view if it is needed.
5551     * This has to be called after layout. Returns true if anything changed.
5552     */
5553    public boolean bringPointIntoView(int offset) {
5554        boolean changed = false;
5555
5556        int line = mLayout.getLineForOffset(offset);
5557
5558        // FIXME: Is it okay to truncate this, or should we round?
5559        final int x = (int)mLayout.getPrimaryHorizontal(offset);
5560        final int top = mLayout.getLineTop(line);
5561        final int bottom = mLayout.getLineTop(line + 1);
5562
5563        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5564        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5565        int ht = mLayout.getHeight();
5566
5567        int grav;
5568
5569        switch (mLayout.getParagraphAlignment(line)) {
5570            case ALIGN_NORMAL:
5571                grav = 1;
5572                break;
5573
5574            case ALIGN_OPPOSITE:
5575                grav = -1;
5576                break;
5577
5578            default:
5579                grav = 0;
5580        }
5581
5582        grav *= mLayout.getParagraphDirection(line);
5583
5584        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5585        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5586
5587        int hslack = (bottom - top) / 2;
5588        int vslack = hslack;
5589
5590        if (vslack > vspace / 4)
5591            vslack = vspace / 4;
5592        if (hslack > hspace / 4)
5593            hslack = hspace / 4;
5594
5595        int hs = mScrollX;
5596        int vs = mScrollY;
5597
5598        if (top - vs < vslack)
5599            vs = top - vslack;
5600        if (bottom - vs > vspace - vslack)
5601            vs = bottom - (vspace - vslack);
5602        if (ht - vs < vspace)
5603            vs = ht - vspace;
5604        if (0 - vs > 0)
5605            vs = 0;
5606
5607        if (grav != 0) {
5608            if (x - hs < hslack) {
5609                hs = x - hslack;
5610            }
5611            if (x - hs > hspace - hslack) {
5612                hs = x - (hspace - hslack);
5613            }
5614        }
5615
5616        if (grav < 0) {
5617            if (left - hs > 0)
5618                hs = left;
5619            if (right - hs < hspace)
5620                hs = right - hspace;
5621        } else if (grav > 0) {
5622            if (right - hs < hspace)
5623                hs = right - hspace;
5624            if (left - hs > 0)
5625                hs = left;
5626        } else /* grav == 0 */ {
5627            if (right - left <= hspace) {
5628                /*
5629                 * If the entire text fits, center it exactly.
5630                 */
5631                hs = left - (hspace - (right - left)) / 2;
5632            } else if (x > right - hslack) {
5633                /*
5634                 * If we are near the right edge, keep the right edge
5635                 * at the edge of the view.
5636                 */
5637                hs = right - hspace;
5638            } else if (x < left + hslack) {
5639                /*
5640                 * If we are near the left edge, keep the left edge
5641                 * at the edge of the view.
5642                 */
5643                hs = left;
5644            } else if (left > hs) {
5645                /*
5646                 * Is there whitespace visible at the left?  Fix it if so.
5647                 */
5648                hs = left;
5649            } else if (right < hs + hspace) {
5650                /*
5651                 * Is there whitespace visible at the right?  Fix it if so.
5652                 */
5653                hs = right - hspace;
5654            } else {
5655                /*
5656                 * Otherwise, float as needed.
5657                 */
5658                if (x - hs < hslack) {
5659                    hs = x - hslack;
5660                }
5661                if (x - hs > hspace - hslack) {
5662                    hs = x - (hspace - hslack);
5663                }
5664            }
5665        }
5666
5667        if (hs != mScrollX || vs != mScrollY) {
5668            if (mScroller == null) {
5669                scrollTo(hs, vs);
5670            } else {
5671                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
5672                int dx = hs - mScrollX;
5673                int dy = vs - mScrollY;
5674
5675                if (duration > ANIMATED_SCROLL_GAP) {
5676                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
5677                    awakenScrollBars(mScroller.getDuration());
5678                    invalidate();
5679                } else {
5680                    if (!mScroller.isFinished()) {
5681                        mScroller.abortAnimation();
5682                    }
5683
5684                    scrollBy(dx, dy);
5685                }
5686
5687                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
5688            }
5689
5690            changed = true;
5691        }
5692
5693        if (isFocused()) {
5694            // This offsets because getInterestingRect() is in terms of
5695            // viewport coordinates, but requestRectangleOnScreen()
5696            // is in terms of content coordinates.
5697
5698            Rect r = new Rect(x, top, x + 1, bottom);
5699            getInterestingRect(r, line);
5700            r.offset(mScrollX, mScrollY);
5701
5702            if (requestRectangleOnScreen(r)) {
5703                changed = true;
5704            }
5705        }
5706
5707        return changed;
5708    }
5709
5710    /**
5711     * Move the cursor, if needed, so that it is at an offset that is visible
5712     * to the user.  This will not move the cursor if it represents more than
5713     * one character (a selection range).  This will only work if the
5714     * TextView contains spannable text; otherwise it will do nothing.
5715     *
5716     * @return True if the cursor was actually moved, false otherwise.
5717     */
5718    public boolean moveCursorToVisibleOffset() {
5719        if (!(mText instanceof Spannable)) {
5720            return false;
5721        }
5722        int start = getSelectionStart();
5723        int end = getSelectionEnd();
5724        if (start != end) {
5725            return false;
5726        }
5727
5728        // First: make sure the line is visible on screen:
5729
5730        int line = mLayout.getLineForOffset(start);
5731
5732        final int top = mLayout.getLineTop(line);
5733        final int bottom = mLayout.getLineTop(line + 1);
5734        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5735        int vslack = (bottom - top) / 2;
5736        if (vslack > vspace / 4)
5737            vslack = vspace / 4;
5738        final int vs = mScrollY;
5739
5740        if (top < (vs+vslack)) {
5741            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
5742        } else if (bottom > (vspace+vs-vslack)) {
5743            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
5744        }
5745
5746        // Next: make sure the character is visible on screen:
5747
5748        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5749        final int hs = mScrollX;
5750        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
5751        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
5752
5753        int newStart = start;
5754        if (newStart < leftChar) {
5755            newStart = leftChar;
5756        } else if (newStart > rightChar) {
5757            newStart = rightChar;
5758        }
5759
5760        if (newStart != start) {
5761            Selection.setSelection((Spannable)mText, newStart);
5762            return true;
5763        }
5764
5765        return false;
5766    }
5767
5768    @Override
5769    public void computeScroll() {
5770        if (mScroller != null) {
5771            if (mScroller.computeScrollOffset()) {
5772                mScrollX = mScroller.getCurrX();
5773                mScrollY = mScroller.getCurrY();
5774                postInvalidate();  // So we draw again
5775            }
5776        }
5777    }
5778
5779    private void getInterestingRect(Rect r, int line) {
5780        convertFromViewportToContentCoordinates(r);
5781
5782        // Rectangle can can be expanded on first and last line to take
5783        // padding into account.
5784        // TODO Take left/right padding into account too?
5785        if (line == 0) r.top -= getExtendedPaddingTop();
5786        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
5787    }
5788
5789    private void convertFromViewportToContentCoordinates(Rect r) {
5790        final int horizontalOffset = viewportToContentHorizontalOffset();
5791        r.left += horizontalOffset;
5792        r.right += horizontalOffset;
5793
5794        final int verticalOffset = viewportToContentVerticalOffset();
5795        r.top += verticalOffset;
5796        r.bottom += verticalOffset;
5797    }
5798
5799    private int viewportToContentHorizontalOffset() {
5800        return getCompoundPaddingLeft() - mScrollX;
5801    }
5802
5803    private int viewportToContentVerticalOffset() {
5804        int offset = getExtendedPaddingTop() - mScrollY;
5805        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5806            offset += getVerticalOffset(false);
5807        }
5808        return offset;
5809    }
5810
5811    @Override
5812    public void debug(int depth) {
5813        super.debug(depth);
5814
5815        String output = debugIndent(depth);
5816        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
5817                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
5818                + "} ";
5819
5820        if (mText != null) {
5821
5822            output += "mText=\"" + mText + "\" ";
5823            if (mLayout != null) {
5824                output += "mLayout width=" + mLayout.getWidth()
5825                        + " height=" + mLayout.getHeight();
5826            }
5827        } else {
5828            output += "mText=NULL";
5829        }
5830        Log.d(VIEW_LOG_TAG, output);
5831    }
5832
5833    /**
5834     * Convenience for {@link Selection#getSelectionStart}.
5835     */
5836    @ViewDebug.ExportedProperty(category = "text")
5837    public int getSelectionStart() {
5838        return Selection.getSelectionStart(getText());
5839    }
5840
5841    /**
5842     * Convenience for {@link Selection#getSelectionEnd}.
5843     */
5844    @ViewDebug.ExportedProperty(category = "text")
5845    public int getSelectionEnd() {
5846        return Selection.getSelectionEnd(getText());
5847    }
5848
5849    /**
5850     * Return true iff there is a selection inside this text view.
5851     */
5852    public boolean hasSelection() {
5853        final int selectionStart = getSelectionStart();
5854        final int selectionEnd = getSelectionEnd();
5855
5856        return selectionStart >= 0 && selectionStart != selectionEnd;
5857    }
5858
5859    /**
5860     * Sets the properties of this field (lines, horizontally scrolling,
5861     * transformation method) to be for a single-line input.
5862     *
5863     * @attr ref android.R.styleable#TextView_singleLine
5864     */
5865    public void setSingleLine() {
5866        setSingleLine(true);
5867    }
5868
5869    /**
5870     * If true, sets the properties of this field (lines, horizontally
5871     * scrolling, transformation method) to be for a single-line input;
5872     * if false, restores these to the default conditions.
5873     * Note that calling this with false restores default conditions,
5874     * not necessarily those that were in effect prior to calling
5875     * it with true.
5876     *
5877     * @attr ref android.R.styleable#TextView_singleLine
5878     */
5879    @android.view.RemotableViewMethod
5880    public void setSingleLine(boolean singleLine) {
5881        if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
5882                == EditorInfo.TYPE_CLASS_TEXT) {
5883            if (singleLine) {
5884                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5885            } else {
5886                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5887            }
5888        }
5889        applySingleLine(singleLine, true);
5890    }
5891
5892    private void applySingleLine(boolean singleLine, boolean applyTransformation) {
5893        mSingleLine = singleLine;
5894        if (singleLine) {
5895            setLines(1);
5896            setHorizontallyScrolling(true);
5897            if (applyTransformation) {
5898                setTransformationMethod(SingleLineTransformationMethod.
5899                                        getInstance());
5900            }
5901        } else {
5902            setMaxLines(Integer.MAX_VALUE);
5903            setHorizontallyScrolling(false);
5904            if (applyTransformation) {
5905                setTransformationMethod(null);
5906            }
5907        }
5908    }
5909
5910    /**
5911     * Causes words in the text that are longer than the view is wide
5912     * to be ellipsized instead of broken in the middle.  You may also
5913     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
5914     * to constrain the text to a single line.  Use <code>null</code>
5915     * to turn off ellipsizing.
5916     *
5917     * @attr ref android.R.styleable#TextView_ellipsize
5918     */
5919    public void setEllipsize(TextUtils.TruncateAt where) {
5920        mEllipsize = where;
5921
5922        if (mLayout != null) {
5923            nullLayouts();
5924            requestLayout();
5925            invalidate();
5926        }
5927    }
5928
5929    /**
5930     * Sets how many times to repeat the marquee animation. Only applied if the
5931     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
5932     *
5933     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
5934     */
5935    public void setMarqueeRepeatLimit(int marqueeLimit) {
5936        mMarqueeRepeatLimit = marqueeLimit;
5937    }
5938
5939    /**
5940     * Returns where, if anywhere, words that are longer than the view
5941     * is wide should be ellipsized.
5942     */
5943    @ViewDebug.ExportedProperty
5944    public TextUtils.TruncateAt getEllipsize() {
5945        return mEllipsize;
5946    }
5947
5948    /**
5949     * Set the TextView so that when it takes focus, all the text is
5950     * selected.
5951     *
5952     * @attr ref android.R.styleable#TextView_selectAllOnFocus
5953     */
5954    @android.view.RemotableViewMethod
5955    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
5956        mSelectAllOnFocus = selectAllOnFocus;
5957
5958        if (selectAllOnFocus && !(mText instanceof Spannable)) {
5959            setText(mText, BufferType.SPANNABLE);
5960        }
5961    }
5962
5963    /**
5964     * Set whether the cursor is visible.  The default is true.
5965     *
5966     * @attr ref android.R.styleable#TextView_cursorVisible
5967     */
5968    @android.view.RemotableViewMethod
5969    public void setCursorVisible(boolean visible) {
5970        mCursorVisible = visible;
5971        invalidate();
5972
5973        if (visible) {
5974            makeBlink();
5975        } else if (mBlink != null) {
5976            mBlink.removeCallbacks(mBlink);
5977        }
5978
5979        // InsertionPointCursorController depends on mCursorVisible
5980        prepareCursorControllers();
5981    }
5982
5983    private boolean canMarquee() {
5984        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
5985        return width > 0 && mLayout.getLineWidth(0) > width;
5986    }
5987
5988    private void startMarquee() {
5989        // Do not ellipsize EditText
5990        if (mInput != null) return;
5991
5992        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5993            return;
5994        }
5995
5996        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
5997                getLineCount() == 1 && canMarquee()) {
5998
5999            if (mMarquee == null) mMarquee = new Marquee(this);
6000            mMarquee.start(mMarqueeRepeatLimit);
6001        }
6002    }
6003
6004    private void stopMarquee() {
6005        if (mMarquee != null && !mMarquee.isStopped()) {
6006            mMarquee.stop();
6007        }
6008    }
6009
6010    private void startStopMarquee(boolean start) {
6011        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6012            if (start) {
6013                startMarquee();
6014            } else {
6015                stopMarquee();
6016            }
6017        }
6018    }
6019
6020    private static final class Marquee extends Handler {
6021        // TODO: Add an option to configure this
6022        private static final float MARQUEE_DELTA_MAX = 0.07f;
6023        private static final int MARQUEE_DELAY = 1200;
6024        private static final int MARQUEE_RESTART_DELAY = 1200;
6025        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6026        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6027
6028        private static final byte MARQUEE_STOPPED = 0x0;
6029        private static final byte MARQUEE_STARTING = 0x1;
6030        private static final byte MARQUEE_RUNNING = 0x2;
6031
6032        private static final int MESSAGE_START = 0x1;
6033        private static final int MESSAGE_TICK = 0x2;
6034        private static final int MESSAGE_RESTART = 0x3;
6035
6036        private final WeakReference<TextView> mView;
6037
6038        private byte mStatus = MARQUEE_STOPPED;
6039        private final float mScrollUnit;
6040        private float mMaxScroll;
6041        float mMaxFadeScroll;
6042        private float mGhostStart;
6043        private float mGhostOffset;
6044        private float mFadeStop;
6045        private int mRepeatLimit;
6046
6047        float mScroll;
6048
6049        Marquee(TextView v) {
6050            final float density = v.getContext().getResources().getDisplayMetrics().density;
6051            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6052            mView = new WeakReference<TextView>(v);
6053        }
6054
6055        @Override
6056        public void handleMessage(Message msg) {
6057            switch (msg.what) {
6058                case MESSAGE_START:
6059                    mStatus = MARQUEE_RUNNING;
6060                    tick();
6061                    break;
6062                case MESSAGE_TICK:
6063                    tick();
6064                    break;
6065                case MESSAGE_RESTART:
6066                    if (mStatus == MARQUEE_RUNNING) {
6067                        if (mRepeatLimit >= 0) {
6068                            mRepeatLimit--;
6069                        }
6070                        start(mRepeatLimit);
6071                    }
6072                    break;
6073            }
6074        }
6075
6076        void tick() {
6077            if (mStatus != MARQUEE_RUNNING) {
6078                return;
6079            }
6080
6081            removeMessages(MESSAGE_TICK);
6082
6083            final TextView textView = mView.get();
6084            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6085                mScroll += mScrollUnit;
6086                if (mScroll > mMaxScroll) {
6087                    mScroll = mMaxScroll;
6088                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6089                } else {
6090                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6091                }
6092                textView.invalidate();
6093            }
6094        }
6095
6096        void stop() {
6097            mStatus = MARQUEE_STOPPED;
6098            removeMessages(MESSAGE_START);
6099            removeMessages(MESSAGE_RESTART);
6100            removeMessages(MESSAGE_TICK);
6101            resetScroll();
6102        }
6103
6104        private void resetScroll() {
6105            mScroll = 0.0f;
6106            final TextView textView = mView.get();
6107            if (textView != null) textView.invalidate();
6108        }
6109
6110        void start(int repeatLimit) {
6111            if (repeatLimit == 0) {
6112                stop();
6113                return;
6114            }
6115            mRepeatLimit = repeatLimit;
6116            final TextView textView = mView.get();
6117            if (textView != null && textView.mLayout != null) {
6118                mStatus = MARQUEE_STARTING;
6119                mScroll = 0.0f;
6120                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6121                        textView.getCompoundPaddingRight();
6122                final float lineWidth = textView.mLayout.getLineWidth(0);
6123                final float gap = textWidth / 3.0f;
6124                mGhostStart = lineWidth - textWidth + gap;
6125                mMaxScroll = mGhostStart + textWidth;
6126                mGhostOffset = lineWidth + gap;
6127                mFadeStop = lineWidth + textWidth / 6.0f;
6128                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6129
6130                textView.invalidate();
6131                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6132            }
6133        }
6134
6135        float getGhostOffset() {
6136            return mGhostOffset;
6137        }
6138
6139        boolean shouldDrawLeftFade() {
6140            return mScroll <= mFadeStop;
6141        }
6142
6143        boolean shouldDrawGhost() {
6144            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6145        }
6146
6147        boolean isRunning() {
6148            return mStatus == MARQUEE_RUNNING;
6149        }
6150
6151        boolean isStopped() {
6152            return mStatus == MARQUEE_STOPPED;
6153        }
6154    }
6155
6156    /**
6157     * This method is called when the text is changed, in case any
6158     * subclasses would like to know.
6159     *
6160     * @param text The text the TextView is displaying.
6161     * @param start The offset of the start of the range of the text
6162     *              that was modified.
6163     * @param before The offset of the former end of the range of the
6164     *               text that was modified.  If text was simply inserted,
6165     *               this will be the same as <code>start</code>.
6166     *               If text was replaced with new text or deleted, the
6167     *               length of the old text was <code>before-start</code>.
6168     * @param after The offset of the end of the range of the text
6169     *              that was modified.  If text was simply deleted,
6170     *              this will be the same as <code>start</code>.
6171     *              If text was replaced with new text or inserted,
6172     *              the length of the new text is <code>after-start</code>.
6173     */
6174    protected void onTextChanged(CharSequence text,
6175                                 int start, int before, int after) {
6176    }
6177
6178    /**
6179     * This method is called when the selection has changed, in case any
6180     * subclasses would like to know.
6181     *
6182     * @param selStart The new selection start location.
6183     * @param selEnd The new selection end location.
6184     */
6185    protected void onSelectionChanged(int selStart, int selEnd) {
6186    }
6187
6188    /**
6189     * Adds a TextWatcher to the list of those whose methods are called
6190     * whenever this TextView's text changes.
6191     * <p>
6192     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6193     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6194     * if there are any text changed listeners forces the buffer type to
6195     * Editable if it would not otherwise be and does call this method.
6196     */
6197    public void addTextChangedListener(TextWatcher watcher) {
6198        if (mListeners == null) {
6199            mListeners = new ArrayList<TextWatcher>();
6200        }
6201
6202        mListeners.add(watcher);
6203    }
6204
6205    /**
6206     * Removes the specified TextWatcher from the list of those whose
6207     * methods are called
6208     * whenever this TextView's text changes.
6209     */
6210    public void removeTextChangedListener(TextWatcher watcher) {
6211        if (mListeners != null) {
6212            int i = mListeners.indexOf(watcher);
6213
6214            if (i >= 0) {
6215                mListeners.remove(i);
6216            }
6217        }
6218    }
6219
6220    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6221                                   int after) {
6222        if (mListeners != null) {
6223            final ArrayList<TextWatcher> list = mListeners;
6224            final int count = list.size();
6225            for (int i = 0; i < count; i++) {
6226                list.get(i).beforeTextChanged(text, start, before, after);
6227            }
6228        }
6229    }
6230
6231    /**
6232     * Not private so it can be called from an inner class without going
6233     * through a thunk.
6234     */
6235    void sendOnTextChanged(CharSequence text, int start, int before,
6236                                   int after) {
6237        if (mListeners != null) {
6238            final ArrayList<TextWatcher> list = mListeners;
6239            final int count = list.size();
6240            for (int i = 0; i < count; i++) {
6241                list.get(i).onTextChanged(text, start, before, after);
6242            }
6243        }
6244    }
6245
6246    /**
6247     * Not private so it can be called from an inner class without going
6248     * through a thunk.
6249     */
6250    void sendAfterTextChanged(Editable text) {
6251        if (mListeners != null) {
6252            final ArrayList<TextWatcher> list = mListeners;
6253            final int count = list.size();
6254            for (int i = 0; i < count; i++) {
6255                list.get(i).afterTextChanged(text);
6256            }
6257        }
6258    }
6259
6260    /**
6261     * Not private so it can be called from an inner class without going
6262     * through a thunk.
6263     */
6264    void handleTextChanged(CharSequence buffer, int start,
6265            int before, int after) {
6266        final InputMethodState ims = mInputMethodState;
6267        if (ims == null || ims.mBatchEditNesting == 0) {
6268            updateAfterEdit();
6269        }
6270        if (ims != null) {
6271            ims.mContentChanged = true;
6272            if (ims.mChangedStart < 0) {
6273                ims.mChangedStart = start;
6274                ims.mChangedEnd = start+before;
6275            } else {
6276                if (ims.mChangedStart > start) ims.mChangedStart = start;
6277                if (ims.mChangedEnd < (start+before)) ims.mChangedEnd = start+before;
6278            }
6279            ims.mChangedDelta += after-before;
6280        }
6281
6282        sendOnTextChanged(buffer, start, before, after);
6283        onTextChanged(buffer, start, before, after);
6284        hideControllers();
6285    }
6286
6287    /**
6288     * Not private so it can be called from an inner class without going
6289     * through a thunk.
6290     */
6291    void spanChange(Spanned buf, Object what, int oldStart, int newStart,
6292            int oldEnd, int newEnd) {
6293        // XXX Make the start and end move together if this ends up
6294        // spending too much time invalidating.
6295
6296        boolean selChanged = false;
6297        int newSelStart=-1, newSelEnd=-1;
6298
6299        final InputMethodState ims = mInputMethodState;
6300
6301        if (what == Selection.SELECTION_END) {
6302            mHighlightPathBogus = true;
6303            selChanged = true;
6304            newSelEnd = newStart;
6305
6306            if (!isFocused()) {
6307                mSelectionMoved = true;
6308            }
6309
6310            if (oldStart >= 0 || newStart >= 0) {
6311                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6312                registerForPreDraw();
6313
6314                if (isFocused()) {
6315                    mShowCursor = SystemClock.uptimeMillis();
6316                    makeBlink();
6317                }
6318            }
6319        }
6320
6321        if (what == Selection.SELECTION_START) {
6322            mHighlightPathBogus = true;
6323            selChanged = true;
6324            newSelStart = newStart;
6325
6326            if (!isFocused()) {
6327                mSelectionMoved = true;
6328            }
6329
6330            if (oldStart >= 0 || newStart >= 0) {
6331                int end = Selection.getSelectionEnd(buf);
6332                invalidateCursor(end, oldStart, newStart);
6333            }
6334        }
6335
6336        if (selChanged) {
6337            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6338                if (newSelStart < 0) {
6339                    newSelStart = Selection.getSelectionStart(buf);
6340                }
6341                if (newSelEnd < 0) {
6342                    newSelEnd = Selection.getSelectionEnd(buf);
6343                }
6344                onSelectionChanged(newSelStart, newSelEnd);
6345            }
6346        }
6347
6348        if (what instanceof UpdateAppearance ||
6349            what instanceof ParagraphStyle) {
6350            if (ims == null || ims.mBatchEditNesting == 0) {
6351                invalidate();
6352                mHighlightPathBogus = true;
6353                checkForResize();
6354            } else {
6355                ims.mContentChanged = true;
6356            }
6357        }
6358
6359        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6360            mHighlightPathBogus = true;
6361            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6362                ims.mSelectionModeChanged = true;
6363            }
6364
6365            if (Selection.getSelectionStart(buf) >= 0) {
6366                if (ims == null || ims.mBatchEditNesting == 0) {
6367                    invalidateCursor();
6368                } else {
6369                    ims.mCursorChanged = true;
6370                }
6371            }
6372        }
6373
6374        if (what instanceof ParcelableSpan) {
6375            // If this is a span that can be sent to a remote process,
6376            // the current extract editor would be interested in it.
6377            if (ims != null && ims.mExtracting != null) {
6378                if (ims.mBatchEditNesting != 0) {
6379                    if (oldStart >= 0) {
6380                        if (ims.mChangedStart > oldStart) {
6381                            ims.mChangedStart = oldStart;
6382                        }
6383                        if (ims.mChangedStart > oldEnd) {
6384                            ims.mChangedStart = oldEnd;
6385                        }
6386                    }
6387                    if (newStart >= 0) {
6388                        if (ims.mChangedStart > newStart) {
6389                            ims.mChangedStart = newStart;
6390                        }
6391                        if (ims.mChangedStart > newEnd) {
6392                            ims.mChangedStart = newEnd;
6393                        }
6394                    }
6395                } else {
6396                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6397                            + oldStart + "-" + oldEnd + ","
6398                            + newStart + "-" + newEnd + what);
6399                    ims.mContentChanged = true;
6400                }
6401            }
6402        }
6403    }
6404
6405    private class ChangeWatcher
6406    implements TextWatcher, SpanWatcher {
6407
6408        private CharSequence mBeforeText;
6409
6410        public void beforeTextChanged(CharSequence buffer, int start,
6411                                      int before, int after) {
6412            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6413                    + " before=" + before + " after=" + after + ": " + buffer);
6414
6415            if (AccessibilityManager.getInstance(mContext).isEnabled()
6416                    && !isPasswordInputType(mInputType)) {
6417                mBeforeText = buffer.toString();
6418            }
6419
6420            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6421        }
6422
6423        public void onTextChanged(CharSequence buffer, int start,
6424                                  int before, int after) {
6425            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6426                    + " before=" + before + " after=" + after + ": " + buffer);
6427            TextView.this.handleTextChanged(buffer, start, before, after);
6428
6429            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6430                    (isFocused() || isSelected() &&
6431                    isShown())) {
6432                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6433                mBeforeText = null;
6434            }
6435        }
6436
6437        public void afterTextChanged(Editable buffer) {
6438            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6439            TextView.this.sendAfterTextChanged(buffer);
6440
6441            if (MetaKeyKeyListener.getMetaState(buffer,
6442                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6443                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6444            }
6445        }
6446
6447        public void onSpanChanged(Spannable buf,
6448                                  Object what, int s, int e, int st, int en) {
6449            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6450                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6451            TextView.this.spanChange(buf, what, s, st, e, en);
6452        }
6453
6454        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6455            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6456                    + " what=" + what + ": " + buf);
6457            TextView.this.spanChange(buf, what, -1, s, -1, e);
6458        }
6459
6460        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
6461            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
6462                    + " what=" + what + ": " + buf);
6463            TextView.this.spanChange(buf, what, s, -1, e, -1);
6464        }
6465    }
6466
6467    private void makeBlink() {
6468        if (!mCursorVisible) {
6469            if (mBlink != null) {
6470                mBlink.removeCallbacks(mBlink);
6471            }
6472
6473            return;
6474        }
6475
6476        if (mBlink == null)
6477            mBlink = new Blink(this);
6478
6479        mBlink.removeCallbacks(mBlink);
6480        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
6481    }
6482
6483    /**
6484     * @hide
6485     */
6486    @Override
6487    public void dispatchFinishTemporaryDetach() {
6488        mDispatchTemporaryDetach = true;
6489        super.dispatchFinishTemporaryDetach();
6490        mDispatchTemporaryDetach = false;
6491    }
6492
6493    @Override
6494    public void onStartTemporaryDetach() {
6495        super.onStartTemporaryDetach();
6496        // Only track when onStartTemporaryDetach() is called directly,
6497        // usually because this instance is an editable field in a list
6498        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
6499    }
6500
6501    @Override
6502    public void onFinishTemporaryDetach() {
6503        super.onFinishTemporaryDetach();
6504        // Only track when onStartTemporaryDetach() is called directly,
6505        // usually because this instance is an editable field in a list
6506        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
6507    }
6508
6509    @Override
6510    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
6511        if (mTemporaryDetach) {
6512            // If we are temporarily in the detach state, then do nothing.
6513            super.onFocusChanged(focused, direction, previouslyFocusedRect);
6514            return;
6515        }
6516
6517        mShowCursor = SystemClock.uptimeMillis();
6518
6519        ensureEndedBatchEdit();
6520
6521        if (focused) {
6522            int selStart = getSelectionStart();
6523            int selEnd = getSelectionEnd();
6524
6525            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
6526                // Has to be done before onTakeFocus, which can be overloaded.
6527                if (mLastTouchOffset >= 0) {
6528                    // Can happen when a TextView is displayed after its content has been deleted.
6529                    mLastTouchOffset = Math.min(mLastTouchOffset, mText.length());
6530                    Selection.setSelection((Spannable) mText, mLastTouchOffset);
6531                }
6532
6533                if (mMovement != null) {
6534                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
6535                }
6536
6537                if (mSelectAllOnFocus) {
6538                    Selection.setSelection((Spannable) mText, 0, mText.length());
6539                }
6540
6541                // The DecorView does not have focus when the 'Done' ExtractEditText button is
6542                // pressed. Since it is the ViewRoot's mView, it requests focus before
6543                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
6544                // This special case ensure that we keep current selection in that case.
6545                // It would be better to know why the DecorView does not have focus at that time.
6546                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
6547                        selStart >= 0 && selEnd >= 0) {
6548                    /*
6549                     * Someone intentionally set the selection, so let them
6550                     * do whatever it is that they wanted to do instead of
6551                     * the default on-focus behavior.  We reset the selection
6552                     * here instead of just skipping the onTakeFocus() call
6553                     * because some movement methods do something other than
6554                     * just setting the selection in theirs and we still
6555                     * need to go through that path.
6556                     */
6557                    Selection.setSelection((Spannable) mText, selStart, selEnd);
6558                }
6559                mTouchFocusSelected = true;
6560            }
6561
6562            mFrozenWithFocus = false;
6563            mSelectionMoved = false;
6564
6565            if (mText instanceof Spannable) {
6566                Spannable sp = (Spannable) mText;
6567                MetaKeyKeyListener.resetMetaState(sp);
6568            }
6569
6570            makeBlink();
6571
6572            if (mError != null) {
6573                showError();
6574            }
6575        } else {
6576            if (mError != null) {
6577                hideError();
6578            }
6579            // Don't leave us in the middle of a batch edit.
6580            onEndBatchEdit();
6581
6582            hideInsertionPointCursorController();
6583            if (this instanceof ExtractEditText) {
6584                // terminateTextSelectionMode would remove selection, which we want to keep when
6585                // ExtractEditText goes out of focus.
6586                mIsInTextSelectionMode = false;
6587            } else {
6588                terminateTextSelectionMode();
6589            }
6590        }
6591
6592        startStopMarquee(focused);
6593
6594        if (mTransformation != null) {
6595            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
6596        }
6597
6598        super.onFocusChanged(focused, direction, previouslyFocusedRect);
6599    }
6600
6601    @Override
6602    public void onWindowFocusChanged(boolean hasWindowFocus) {
6603        super.onWindowFocusChanged(hasWindowFocus);
6604
6605        if (hasWindowFocus) {
6606            if (mBlink != null) {
6607                mBlink.uncancel();
6608
6609                if (isFocused()) {
6610                    mShowCursor = SystemClock.uptimeMillis();
6611                    makeBlink();
6612                }
6613            }
6614        } else {
6615            if (mBlink != null) {
6616                mBlink.cancel();
6617            }
6618            // Don't leave us in the middle of a batch edit.
6619            onEndBatchEdit();
6620            if (mInputContentType != null) {
6621                mInputContentType.enterDown = false;
6622            }
6623        }
6624
6625        startStopMarquee(hasWindowFocus);
6626    }
6627
6628    /**
6629     * Use {@link BaseInputConnection#removeComposingSpans
6630     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
6631     * state from this text view.
6632     */
6633    public void clearComposingText() {
6634        if (mText instanceof Spannable) {
6635            BaseInputConnection.removeComposingSpans((Spannable)mText);
6636        }
6637    }
6638
6639    @Override
6640    public void setSelected(boolean selected) {
6641        boolean wasSelected = isSelected();
6642
6643        super.setSelected(selected);
6644
6645        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6646            if (selected) {
6647                startMarquee();
6648            } else {
6649                stopMarquee();
6650            }
6651        }
6652    }
6653
6654    private void onTapUpEvent(int prevStart, int prevEnd) {
6655        final int start = getSelectionStart();
6656        final int end = getSelectionEnd();
6657
6658        if (start == end) {
6659            if (start >= prevStart && start < prevEnd) {
6660                // Restore previous selection
6661                Selection.setSelection((Spannable)mText, prevStart, prevEnd);
6662                // Tapping inside the selection displays the cut/copy/paste context menu.
6663                showContextMenu();
6664                return;
6665            } else {
6666                // Tapping outside stops selection mode, if any
6667                stopTextSelectionMode();
6668
6669                if (mInsertionPointCursorController != null) {
6670                    mInsertionPointCursorController.show();
6671                }
6672            }
6673        }
6674    }
6675
6676    class CommitSelectionReceiver extends ResultReceiver {
6677        private final int mPrevStart, mPrevEnd;
6678
6679        public CommitSelectionReceiver(int prevStart, int prevEnd) {
6680            super(getHandler());
6681            mPrevStart = prevStart;
6682            mPrevEnd = prevEnd;
6683        }
6684
6685        @Override
6686        protected void onReceiveResult(int resultCode, Bundle resultData) {
6687            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
6688            // by restoring its previous position.
6689            if (resultCode == InputMethodManager.RESULT_SHOWN) {
6690                final int len = mText.length();
6691                int start = Math.min(len, mPrevStart);
6692                int end = Math.min(len, mPrevEnd);
6693                Selection.setSelection((Spannable)mText, start, end);
6694
6695                if (hasSelection()) {
6696                    startTextSelectionMode();
6697                } else if (mInsertionPointCursorController != null) {
6698                    mInsertionPointCursorController.show();
6699                }
6700            }
6701        }
6702    }
6703
6704    @Override
6705    public boolean onTouchEvent(MotionEvent event) {
6706        final int action = event.getActionMasked();
6707        if (action == MotionEvent.ACTION_DOWN) {
6708            // Check to see if we're testing for our anchor overlay.
6709            boolean handled = false;
6710            final float x = event.getX();
6711            final float y = event.getY();
6712            if (x < 0 || x >= mRight - mLeft || y < 0 || y >= mBottom - mTop) {
6713                if (mInsertionPointCursorController != null) {
6714                    handled |= mInsertionPointCursorController.onTouchEvent(event);
6715                }
6716                if (mSelectionModifierCursorController != null) {
6717                    handled |= mSelectionModifierCursorController.onTouchEvent(event);
6718                }
6719
6720                if (!handled) {
6721                    return false;
6722                }
6723            }
6724
6725            // Reset this state; it will be re-set if super.onTouchEvent
6726            // causes focus to move to the view.
6727            mTouchFocusSelected = false;
6728            mScrolled = false;
6729
6730            if (handled) {
6731                return true;
6732            }
6733        }
6734
6735        final boolean superResult = super.onTouchEvent(event);
6736
6737        /*
6738         * Don't handle the release after a long press, because it will
6739         * move the selection away from whatever the menu action was
6740         * trying to affect.
6741         */
6742        if (mEatTouchRelease && action == MotionEvent.ACTION_UP) {
6743            mEatTouchRelease = false;
6744            return superResult;
6745        }
6746
6747        if ((mMovement != null || onCheckIsTextEditor()) && mText instanceof Spannable && mLayout != null) {
6748
6749            if (mInsertionPointCursorController != null) {
6750                mInsertionPointCursorController.onTouchEvent(event);
6751            }
6752            if (mSelectionModifierCursorController != null) {
6753                mSelectionModifierCursorController.onTouchEvent(event);
6754            }
6755
6756            boolean handled = false;
6757
6758            // Save previous selection, in case this event is used to show the IME.
6759            int oldSelStart = getSelectionStart();
6760            int oldSelEnd = getSelectionEnd();
6761
6762            if (mMovement != null) {
6763                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
6764            }
6765
6766            if (isTextEditable()) {
6767                if (action == MotionEvent.ACTION_UP && isFocused() && !mScrolled) {
6768                    InputMethodManager imm = (InputMethodManager)
6769                          getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
6770
6771                    CommitSelectionReceiver csr = null;
6772                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
6773                            didTouchFocusSelect()) {
6774                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
6775                    }
6776
6777                    handled |= imm.showSoftInput(this, 0, csr) && (csr != null);
6778
6779                    // Cannot be done by CommitSelectionReceiver, which might not always be called,
6780                    // for instance when dealing with an ExtractEditText.
6781                    onTapUpEvent(oldSelStart, oldSelEnd);
6782                }
6783            }
6784
6785            if (handled) {
6786                return true;
6787            }
6788        }
6789
6790        return superResult;
6791    }
6792
6793    private void prepareCursorControllers() {
6794        // TODO Add an extra android:cursorController flag to disable the controller?
6795        if (mCursorVisible && mLayout != null) {
6796            if (mInsertionPointCursorController == null) {
6797                mInsertionPointCursorController = new InsertionPointCursorController();
6798            }
6799        } else {
6800            mInsertionPointCursorController = null;
6801        }
6802
6803        if (canSelectText() && mLayout != null) {
6804            if (mSelectionModifierCursorController == null) {
6805                mSelectionModifierCursorController = new SelectionModifierCursorController();
6806            }
6807        } else {
6808            // Stop selection mode if the controller becomes unavailable.
6809            stopTextSelectionMode();
6810            mSelectionModifierCursorController = null;
6811        }
6812    }
6813
6814    /**
6815     * @return True iff this TextView contains a text that can be edited.
6816     */
6817    private boolean isTextEditable() {
6818        return mText instanceof Editable && onCheckIsTextEditor();
6819    }
6820
6821    /**
6822     * Returns true, only while processing a touch gesture, if the initial
6823     * touch down event caused focus to move to the text view and as a result
6824     * its selection changed.  Only valid while processing the touch gesture
6825     * of interest.
6826     */
6827    public boolean didTouchFocusSelect() {
6828        return mTouchFocusSelected;
6829    }
6830
6831    @Override
6832    public void cancelLongPress() {
6833        super.cancelLongPress();
6834        mScrolled = true;
6835    }
6836
6837    @Override
6838    public boolean onTrackballEvent(MotionEvent event) {
6839        if (mMovement != null && mText instanceof Spannable &&
6840            mLayout != null) {
6841            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
6842                return true;
6843            }
6844        }
6845
6846        return super.onTrackballEvent(event);
6847    }
6848
6849    public void setScroller(Scroller s) {
6850        mScroller = s;
6851    }
6852
6853    private static class Blink extends Handler implements Runnable {
6854        private final WeakReference<TextView> mView;
6855        private boolean mCancelled;
6856
6857        public Blink(TextView v) {
6858            mView = new WeakReference<TextView>(v);
6859        }
6860
6861        public void run() {
6862            if (mCancelled) {
6863                return;
6864            }
6865
6866            removeCallbacks(Blink.this);
6867
6868            TextView tv = mView.get();
6869
6870            if (tv != null && tv.isFocused()) {
6871                int st = tv.getSelectionStart();
6872                int en = tv.getSelectionEnd();
6873
6874                if (st == en && st >= 0 && en >= 0) {
6875                    if (tv.mLayout != null) {
6876                        tv.invalidateCursorPath();
6877                    }
6878
6879                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
6880                }
6881            }
6882        }
6883
6884        void cancel() {
6885            if (!mCancelled) {
6886                removeCallbacks(Blink.this);
6887                mCancelled = true;
6888            }
6889        }
6890
6891        void uncancel() {
6892            mCancelled = false;
6893        }
6894    }
6895
6896    @Override
6897    protected float getLeftFadingEdgeStrength() {
6898        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6899            if (mMarquee != null && !mMarquee.isStopped()) {
6900                final Marquee marquee = mMarquee;
6901                if (marquee.shouldDrawLeftFade()) {
6902                    return marquee.mScroll / getHorizontalFadingEdgeLength();
6903                } else {
6904                    return 0.0f;
6905                }
6906            } else if (getLineCount() == 1) {
6907                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6908                    case Gravity.LEFT:
6909                        return 0.0f;
6910                    case Gravity.RIGHT:
6911                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
6912                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
6913                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
6914                    case Gravity.CENTER_HORIZONTAL:
6915                        return 0.0f;
6916                }
6917            }
6918        }
6919        return super.getLeftFadingEdgeStrength();
6920    }
6921
6922    @Override
6923    protected float getRightFadingEdgeStrength() {
6924        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6925            if (mMarquee != null && !mMarquee.isStopped()) {
6926                final Marquee marquee = mMarquee;
6927                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
6928            } else if (getLineCount() == 1) {
6929                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6930                    case Gravity.LEFT:
6931                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
6932                                getCompoundPaddingRight();
6933                        final float lineWidth = mLayout.getLineWidth(0);
6934                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
6935                    case Gravity.RIGHT:
6936                        return 0.0f;
6937                    case Gravity.CENTER_HORIZONTAL:
6938                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
6939                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
6940                                getHorizontalFadingEdgeLength();
6941                }
6942            }
6943        }
6944        return super.getRightFadingEdgeStrength();
6945    }
6946
6947    @Override
6948    protected int computeHorizontalScrollRange() {
6949        if (mLayout != null)
6950            return mLayout.getWidth();
6951
6952        return super.computeHorizontalScrollRange();
6953    }
6954
6955    @Override
6956    protected int computeVerticalScrollRange() {
6957        if (mLayout != null)
6958            return mLayout.getHeight();
6959
6960        return super.computeVerticalScrollRange();
6961    }
6962
6963    @Override
6964    protected int computeVerticalScrollExtent() {
6965        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
6966    }
6967
6968    public enum BufferType {
6969        NORMAL, SPANNABLE, EDITABLE,
6970    }
6971
6972    /**
6973     * Returns the TextView_textColor attribute from the
6974     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
6975     * from the TextView_textAppearance attribute, if TextView_textColor
6976     * was not set directly.
6977     */
6978    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
6979        ColorStateList colors;
6980        colors = attrs.getColorStateList(com.android.internal.R.styleable.
6981                                         TextView_textColor);
6982
6983        if (colors == null) {
6984            int ap = attrs.getResourceId(com.android.internal.R.styleable.
6985                                         TextView_textAppearance, -1);
6986            if (ap != -1) {
6987                TypedArray appearance;
6988                appearance = context.obtainStyledAttributes(ap,
6989                                            com.android.internal.R.styleable.TextAppearance);
6990                colors = appearance.getColorStateList(com.android.internal.R.styleable.
6991                                                  TextAppearance_textColor);
6992                appearance.recycle();
6993            }
6994        }
6995
6996        return colors;
6997    }
6998
6999    /**
7000     * Returns the default color from the TextView_textColor attribute
7001     * from the AttributeSet, if set, or the default color from the
7002     * TextAppearance_textColor from the TextView_textAppearance attribute,
7003     * if TextView_textColor was not set directly.
7004     */
7005    public static int getTextColor(Context context,
7006                                   TypedArray attrs,
7007                                   int def) {
7008        ColorStateList colors = getTextColors(context, attrs);
7009
7010        if (colors == null) {
7011            return def;
7012        } else {
7013            return colors.getDefaultColor();
7014        }
7015    }
7016
7017    @Override
7018    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7019        switch (keyCode) {
7020        case KeyEvent.KEYCODE_A:
7021            if (canSelectAll()) {
7022                return onTextContextMenuItem(ID_SELECT_ALL);
7023            }
7024
7025            break;
7026
7027        case KeyEvent.KEYCODE_X:
7028            if (canCut()) {
7029                return onTextContextMenuItem(ID_CUT);
7030            }
7031
7032            break;
7033
7034        case KeyEvent.KEYCODE_C:
7035            if (canCopy()) {
7036                return onTextContextMenuItem(ID_COPY);
7037            }
7038
7039            break;
7040
7041        case KeyEvent.KEYCODE_V:
7042            if (canPaste()) {
7043                return onTextContextMenuItem(ID_PASTE);
7044            }
7045
7046            break;
7047        }
7048
7049        return super.onKeyShortcut(keyCode, event);
7050    }
7051
7052    private boolean canSelectAll() {
7053        return canSelectText() && mText.length() != 0;
7054    }
7055
7056    private boolean canSelectText() {
7057        // prepareCursorController() relies on this method.
7058        // If you change this condition, make sure prepareCursorController is called anywhere
7059        // the value of this condition might be changed.
7060        return (mText instanceof Spannable &&
7061                mMovement != null &&
7062                mMovement.canSelectArbitrarily());
7063    }
7064
7065    private boolean canCut() {
7066        if (mTransformation instanceof PasswordTransformationMethod) {
7067            return false;
7068        }
7069
7070        if (mText.length() > 0 && hasSelection()) {
7071            if (mText instanceof Editable && mInput != null) {
7072                return true;
7073            }
7074        }
7075
7076        return false;
7077    }
7078
7079    private boolean canCopy() {
7080        if (mTransformation instanceof PasswordTransformationMethod) {
7081            return false;
7082        }
7083
7084        if (mText.length() > 0 && hasSelection()) {
7085            return true;
7086        }
7087
7088        return false;
7089    }
7090
7091    private boolean canPaste() {
7092        return (mText instanceof Editable &&
7093                mInput != null &&
7094                getSelectionStart() >= 0 &&
7095                getSelectionEnd() >= 0 &&
7096                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7097                hasText());
7098    }
7099
7100    /**
7101     * Returns the offsets delimiting the 'word' located at position offset.
7102     *
7103     * @param offset An offset in the text.
7104     * @return The offsets for the start and end of the word located at <code>offset</code>.
7105     * The two ints offsets are packed in a long, with the starting offset shifted by 32 bits.
7106     * Returns a negative value if no valid word was found.
7107     */
7108    private long getWordLimitsAt(int offset) {
7109        /*
7110         * Quick return if the input type is one where adding words
7111         * to the dictionary doesn't make any sense.
7112         */
7113        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7114        if (klass == InputType.TYPE_CLASS_NUMBER ||
7115            klass == InputType.TYPE_CLASS_PHONE ||
7116            klass == InputType.TYPE_CLASS_DATETIME) {
7117            return -1;
7118        }
7119
7120        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7121        if (variation == InputType.TYPE_TEXT_VARIATION_URI ||
7122            variation == InputType.TYPE_TEXT_VARIATION_PASSWORD ||
7123            variation == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD ||
7124            variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7125            variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7126            return -1;
7127        }
7128
7129        int len = mText.length();
7130        int end = Math.min(offset, len);
7131
7132        if (end < 0) {
7133            return -1;
7134        }
7135
7136        int start = end;
7137
7138        for (; start > 0; start--) {
7139            char c = mTransformed.charAt(start - 1);
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        for (; end < len; end++) {
7153            char c = mTransformed.charAt(end);
7154            int type = Character.getType(c);
7155
7156            if (c != '\'' &&
7157                type != Character.UPPERCASE_LETTER &&
7158                type != Character.LOWERCASE_LETTER &&
7159                type != Character.TITLECASE_LETTER &&
7160                type != Character.MODIFIER_LETTER &&
7161                type != Character.DECIMAL_DIGIT_NUMBER) {
7162                break;
7163            }
7164        }
7165
7166        if (start == end) {
7167            return -1;
7168        }
7169
7170        if (end - start > 48) {
7171            return -1;
7172        }
7173
7174        boolean hasLetter = false;
7175        for (int i = start; i < end; i++) {
7176            if (Character.isLetter(mTransformed.charAt(i))) {
7177                hasLetter = true;
7178                break;
7179            }
7180        }
7181
7182        if (!hasLetter) {
7183            return -1;
7184        }
7185
7186        // Two ints packed in a long
7187        return (((long) start) << 32) | end;
7188    }
7189
7190    private void selectCurrentWord() {
7191        // In case selection mode is started after an orientation change or after a select all,
7192        // use the current selection instead of creating one
7193        if (hasSelection()) {
7194            return;
7195        }
7196
7197        int selectionStart, selectionEnd;
7198
7199        // selectionModifierCursorController is not null at that point
7200        SelectionModifierCursorController selectionModifierCursorController =
7201            ((SelectionModifierCursorController) mSelectionModifierCursorController);
7202        int minOffset = selectionModifierCursorController.getMinTouchOffset();
7203        int maxOffset = selectionModifierCursorController.getMaxTouchOffset();
7204
7205        if (minOffset == maxOffset) {
7206            int offset = Math.max(0, Math.min(minOffset, mTransformed.length()));
7207
7208            // Tolerance, number of charaters around tapped position
7209            final int range = 1;
7210            final int max = mTransformed.length() - 1;
7211
7212            // 'Smart' word selection: detect position between words
7213            for (int i = -range; i <= range; i++) {
7214                int index = offset + i;
7215                if (index >= 0 && index <= max) {
7216                    if (Character.isSpaceChar(mTransformed.charAt(index))) {
7217                        // Select current space
7218                        selectionStart = index;
7219                        selectionEnd = selectionStart + 1;
7220
7221                        // Extend selection to maximum space range
7222                        while (selectionStart > 0 &&
7223                                Character.isSpaceChar(mTransformed.charAt(selectionStart - 1))) {
7224                            selectionStart--;
7225                        }
7226                        while (selectionEnd < max &&
7227                                Character.isSpaceChar(mTransformed.charAt(selectionEnd))) {
7228                            selectionEnd++;
7229                        }
7230
7231                        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7232                        return;
7233                    }
7234                }
7235            }
7236
7237            // 'Smart' word selection: detect position at beginning or end of text.
7238            if (offset <= range) {
7239                Selection.setSelection((Spannable) mText, 0, 0);
7240                return;
7241            }
7242            if (offset >= (max - range)) {
7243                Selection.setSelection((Spannable) mText, max + 1, max + 1);
7244                return;
7245            }
7246        }
7247
7248        long wordLimits = getWordLimitsAt(minOffset);
7249        if (wordLimits >= 0) {
7250            selectionStart = (int) (wordLimits >>> 32);
7251        } else {
7252            selectionStart = Math.max(minOffset - 5, 0);
7253        }
7254
7255        wordLimits = getWordLimitsAt(maxOffset);
7256        if (wordLimits >= 0) {
7257            selectionEnd = (int) (wordLimits & 0x00000000FFFFFFFFL);
7258        } else {
7259            selectionEnd = Math.min(maxOffset + 5, mText.length());
7260        }
7261
7262        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7263    }
7264
7265    private String getWordForDictionary() {
7266        if (mLastTouchOffset < 0) {
7267            return null;
7268        }
7269
7270        long wordLimits = getWordLimitsAt(mLastTouchOffset);
7271        if (wordLimits >= 0) {
7272            int start = (int) (wordLimits >>> 32);
7273            int end = (int) (wordLimits & 0x00000000FFFFFFFFL);
7274            return mTransformed.subSequence(start, end).toString();
7275        } else {
7276            return null;
7277        }
7278    }
7279
7280    @Override
7281    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7282        if (!isShown()) {
7283            return false;
7284        }
7285
7286        final boolean isPassword = isPasswordInputType(mInputType);
7287
7288        if (!isPassword) {
7289            CharSequence text = getText();
7290            if (TextUtils.isEmpty(text)) {
7291                text = getHint();
7292            }
7293            if (!TextUtils.isEmpty(text)) {
7294                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7295                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7296                }
7297                event.getText().add(text);
7298            }
7299        } else {
7300            event.setPassword(isPassword);
7301        }
7302        return false;
7303    }
7304
7305    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7306            int fromIndex, int removedCount, int addedCount) {
7307        AccessibilityEvent event =
7308            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7309        event.setFromIndex(fromIndex);
7310        event.setRemovedCount(removedCount);
7311        event.setAddedCount(addedCount);
7312        event.setBeforeText(beforeText);
7313        sendAccessibilityEventUnchecked(event);
7314    }
7315
7316    @Override
7317    protected void onCreateContextMenu(ContextMenu menu) {
7318        super.onCreateContextMenu(menu);
7319        boolean added = false;
7320
7321        if (mIsInTextSelectionMode) {
7322            MenuHandler handler = new MenuHandler();
7323
7324            if (canCut()) {
7325                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
7326                     setOnMenuItemClickListener(handler).
7327                     setAlphabeticShortcut('x');
7328                added = true;
7329            }
7330
7331            if (canCopy()) {
7332                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7333                     setOnMenuItemClickListener(handler).
7334                     setAlphabeticShortcut('c');
7335                added = true;
7336            }
7337
7338            if (canPaste()) {
7339                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7340                     setOnMenuItemClickListener(handler).
7341                     setAlphabeticShortcut('v');
7342                added = true;
7343            }
7344        } else {
7345            /*
7346            if (!isFocused()) {
7347                if (isFocusable() && mInput != null) {
7348                    if (canCopy()) {
7349                        MenuHandler handler = new MenuHandler();
7350                        menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7351                             setOnMenuItemClickListener(handler).
7352                             setAlphabeticShortcut('c');
7353                        menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7354                    }
7355                }
7356
7357                //return;
7358            }
7359             */
7360            MenuHandler handler = new MenuHandler();
7361
7362            if (canSelectText()) {
7363                menu.add(0, ID_START_SELECTING_TEXT, 0, com.android.internal.R.string.selectText).
7364                setOnMenuItemClickListener(handler);
7365                added = true;
7366            }
7367
7368            if (canSelectAll()) {
7369                menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
7370                     setOnMenuItemClickListener(handler).
7371                     setAlphabeticShortcut('a');
7372                added = true;
7373            }
7374
7375            if (mText instanceof Spanned) {
7376                int selStart = getSelectionStart();
7377                int selEnd = getSelectionEnd();
7378
7379                int min = Math.min(selStart, selEnd);
7380                int max = Math.max(selStart, selEnd);
7381
7382                URLSpan[] urls = ((Spanned) mText).getSpans(min, max,
7383                        URLSpan.class);
7384                if (urls.length == 1) {
7385                    menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7386                         setOnMenuItemClickListener(handler);
7387                    added = true;
7388                }
7389            }
7390
7391            // Paste location is too imprecise. Only allow on empty text fields.
7392            if (canPaste() && textIsOnlySpaces()) {
7393                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7394                     setOnMenuItemClickListener(handler).
7395                     setAlphabeticShortcut('v');
7396                added = true;
7397            }
7398
7399            if (isInputMethodTarget()) {
7400                menu.add(1, ID_SWITCH_INPUT_METHOD, 0, com.android.internal.R.string.inputMethod).
7401                     setOnMenuItemClickListener(handler);
7402                added = true;
7403            }
7404
7405            String word = getWordForDictionary();
7406            if (word != null) {
7407                menu.add(1, ID_ADD_TO_DICTIONARY, 0,
7408                     getContext().getString(com.android.internal.R.string.addToDictionary, word)).
7409                     setOnMenuItemClickListener(handler);
7410                added = true;
7411
7412            }
7413        }
7414
7415        if (added) {
7416            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7417        }
7418    }
7419
7420    private boolean textIsOnlySpaces() {
7421        final int length = mTransformed.length();
7422        for (int i = 0; i < length; i++) {
7423            if (!Character.isSpaceChar(mTransformed.charAt(i))) {
7424                return false;
7425            }
7426        }
7427        return true;
7428    }
7429
7430    /**
7431     * Returns whether this text view is a current input method target.  The
7432     * default implementation just checks with {@link InputMethodManager}.
7433     */
7434    public boolean isInputMethodTarget() {
7435        InputMethodManager imm = InputMethodManager.peekInstance();
7436        return imm != null && imm.isActive(this);
7437    }
7438
7439    // Context menu entries
7440    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7441    private static final int ID_START_SELECTING_TEXT = android.R.id.startSelectingText;
7442    private static final int ID_CUT = android.R.id.cut;
7443    private static final int ID_COPY = android.R.id.copy;
7444    private static final int ID_PASTE = android.R.id.paste;
7445    private static final int ID_COPY_URL = android.R.id.copyUrl;
7446    private static final int ID_SWITCH_INPUT_METHOD = android.R.id.switchInputMethod;
7447    private static final int ID_ADD_TO_DICTIONARY = android.R.id.addToDictionary;
7448
7449    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7450        public boolean onMenuItemClick(MenuItem item) {
7451            return onTextContextMenuItem(item.getItemId());
7452        }
7453    }
7454
7455    /**
7456     * Called when a context menu option for the text view is selected.  Currently
7457     * this will be one of: {@link android.R.id#selectAll},
7458     * {@link android.R.id#startSelectingText},
7459     * {@link android.R.id#cut}, {@link android.R.id#copy},
7460     * {@link android.R.id#paste}, {@link android.R.id#copyUrl},
7461     * or {@link android.R.id#switchInputMethod}.
7462     */
7463    public boolean onTextContextMenuItem(int id) {
7464        int min = 0;
7465        int max = mText.length();
7466
7467        if (isFocused()) {
7468            final int selStart = getSelectionStart();
7469            final int selEnd = getSelectionEnd();
7470
7471            min = Math.max(0, Math.min(selStart, selEnd));
7472            max = Math.max(0, Math.max(selStart, selEnd));
7473        }
7474
7475        ClipboardManager clip = (ClipboardManager)getContext()
7476                .getSystemService(Context.CLIPBOARD_SERVICE);
7477
7478        switch (id) {
7479            case ID_SELECT_ALL:
7480                Selection.setSelection((Spannable) mText, 0, mText.length());
7481                startTextSelectionMode();
7482                return true;
7483
7484            case ID_START_SELECTING_TEXT:
7485                startTextSelectionMode();
7486                return true;
7487
7488            case ID_CUT:
7489                clip.setText(mTransformed.subSequence(min, max));
7490                ((Editable) mText).delete(min, max);
7491                stopTextSelectionMode();
7492                return true;
7493
7494            case ID_COPY:
7495                clip.setText(mTransformed.subSequence(min, max));
7496                stopTextSelectionMode();
7497                return true;
7498
7499            case ID_PASTE:
7500                CharSequence paste = clip.getText();
7501
7502                if (paste != null && paste.length() > 0) {
7503                    // Paste adds/removes spaces before or after insertion as needed.
7504
7505                    if (Character.isSpaceChar(paste.charAt(0))) {
7506                        if (min > 0 && Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7507                            // Two spaces at beginning of paste: remove one
7508                            ((Editable) mText).replace(min - 1, min, "");
7509                            min = min - 1;
7510                            max = max - 1;
7511                        }
7512                    } else {
7513                        if (min > 0 && !Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7514                            // No space at beginning of paste: add one
7515                            ((Editable) mText).replace(min, min, " ");
7516                            min = min + 1;
7517                            max = max + 1;
7518                        }
7519                    }
7520
7521                    if (Character.isSpaceChar(paste.charAt(paste.length() - 1))) {
7522                        if (max < mText.length() && Character.isSpaceChar(mTransformed.charAt(max))) {
7523                            // Two spaces at end of paste: remove one
7524                            ((Editable) mText).replace(max, max + 1, "");
7525                        }
7526                    } else {
7527                        if (max < mText.length() && !Character.isSpaceChar(mTransformed.charAt(max))) {
7528                            // No space at end of paste: add one
7529                            ((Editable) mText).replace(max, max, " ");
7530                        }
7531                    }
7532
7533                    Selection.setSelection((Spannable) mText, max);
7534                    ((Editable) mText).replace(min, max, paste);
7535                    stopTextSelectionMode();
7536                }
7537                return true;
7538
7539            case ID_COPY_URL:
7540                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7541                if (urls.length == 1) {
7542                    clip.setText(urls[0].getURL());
7543                }
7544                return true;
7545
7546            case ID_SWITCH_INPUT_METHOD:
7547                InputMethodManager imm = InputMethodManager.peekInstance();
7548                if (imm != null) {
7549                    imm.showInputMethodPicker();
7550                }
7551                return true;
7552
7553            case ID_ADD_TO_DICTIONARY:
7554                String word = getWordForDictionary();
7555
7556                if (word != null) {
7557                    Intent i = new Intent("com.android.settings.USER_DICTIONARY_INSERT");
7558                    i.putExtra("word", word);
7559                    i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
7560                    getContext().startActivity(i);
7561                }
7562                return true;
7563            }
7564
7565        return false;
7566    }
7567
7568    @Override
7569    public boolean performLongClick() {
7570        if (super.performLongClick()) {
7571            mEatTouchRelease = true;
7572            return true;
7573        }
7574
7575        return false;
7576    }
7577
7578    private void startTextSelectionMode() {
7579        if (!mIsInTextSelectionMode) {
7580            if (mSelectionModifierCursorController == null) {
7581                Log.w(LOG_TAG, "TextView has no selection controller. Action mode cancelled.");
7582                return;
7583            }
7584
7585            if (!requestFocus()) {
7586                return;
7587            }
7588
7589            selectCurrentWord();
7590            mSelectionModifierCursorController.show();
7591            mIsInTextSelectionMode = true;
7592        }
7593    }
7594
7595    /**
7596     * Same as {@link #stopTextSelectionMode()}, except that there is no cursor controller
7597     * fade out animation. Needed since the drawable and their alpha values are shared by all
7598     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
7599     * new one otherwise.
7600     */
7601    private void terminateTextSelectionMode() {
7602        stopTextSelectionMode();
7603        if (mSelectionModifierCursorController != null) {
7604            SelectionModifierCursorController selectionModifierCursorController =
7605                (SelectionModifierCursorController) mSelectionModifierCursorController;
7606            selectionModifierCursorController.cancelFadeOutAnimation();
7607        }
7608    }
7609
7610    private void stopTextSelectionMode() {
7611        if (mIsInTextSelectionMode) {
7612            Selection.setSelection((Spannable) mText, getSelectionEnd());
7613            if (mSelectionModifierCursorController != null) {
7614                mSelectionModifierCursorController.hide();
7615            }
7616
7617            mIsInTextSelectionMode = false;
7618        }
7619    }
7620
7621    private void updateOverlay() {
7622        boolean enableOverlay = false;
7623        if (mSelectionModifierCursorController != null) {
7624            enableOverlay |= mSelectionModifierCursorController.isShowing();
7625        }
7626        if (mInsertionPointCursorController != null) {
7627            enableOverlay |= mInsertionPointCursorController.isShowing();
7628        }
7629        setOverlayEnabled(enableOverlay);
7630    }
7631
7632    /**
7633     * A CursorController instance can be used to control a cursor in the text.
7634     *
7635     * It can be passed to an {@link ArrowKeyMovementMethod} which can intercepts events
7636     * and send them to this object instead of the cursor.
7637     */
7638    public interface CursorController {
7639        /* Cursor fade-out animation duration, in milliseconds. */
7640        static final int FADE_OUT_DURATION = 400;
7641
7642        /**
7643         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
7644         * See also {@link #hide()}.
7645         */
7646        public void show();
7647
7648        /**
7649         * Hide the cursor controller from screen.
7650         * See also {@link #show()}.
7651         */
7652        public void hide();
7653
7654        /**
7655         * @return true if the CursorController is currently visible
7656         */
7657        public boolean isShowing();
7658
7659        /**
7660         * Update the controller's position.
7661         */
7662        public void updatePosition(int x, int y);
7663
7664        /**
7665         * The controller and the cursor's positions can be link by a fixed offset,
7666         * computed when the controller is touched, and then maintained as it moves
7667         * @return Horizontal offset between the controller and the cursor.
7668         */
7669        public float getOffsetX();
7670
7671        /**
7672         * @return Vertical offset between the controller and the cursor.
7673         */
7674        public float getOffsetY();
7675
7676        /**
7677         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
7678         * a chance to become active and/or visible.
7679         * @param event The touch event
7680         */
7681        public boolean onTouchEvent(MotionEvent event);
7682
7683        /**
7684         * Draws a visual representation of the controller on the canvas.
7685         *
7686         * Called at the end of {@link #draw(Canvas)}, in the content coordinates system.
7687         * @param canvas The Canvas used by this TextView.
7688         */
7689        public void draw(Canvas canvas);
7690    }
7691
7692    private class Handle {
7693        Drawable mDrawable;
7694        // Vertical extension of the touch region
7695        int mTopExtension, mBottomExtension;
7696        // Position of the virtual finger position on screen
7697        int mHotSpotVerticalPosition;
7698
7699        Handle(Drawable drawable) {
7700            mDrawable = drawable;
7701        }
7702
7703        void positionAtCursor(final int offset, boolean bottom) {
7704            final int drawableWidth = mDrawable.getIntrinsicWidth();
7705            final int drawableHeight = mDrawable.getIntrinsicHeight();
7706            final int line = mLayout.getLineForOffset(offset);
7707            final int lineTop = mLayout.getLineTop(line);
7708            final int lineBottom = mLayout.getLineBottom(line);
7709
7710            mHotSpotVerticalPosition = lineTop;
7711
7712            final Rect bounds = sCursorControllerTempRect;
7713            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - drawableWidth / 2.0)
7714                + mScrollX;
7715            bounds.top = (bottom ? lineBottom : lineTop) + mScrollY;
7716
7717            mTopExtension = bottom ? 0 : drawableHeight / 2;
7718            mBottomExtension = 0; //drawableHeight / 4;
7719
7720            // Extend touch region up when editing the last line of text (or a single line) so that
7721            // it is easier to grab.
7722            if (line == mLayout.getLineCount() - 1) {
7723                mTopExtension = (lineBottom - lineTop) - drawableHeight / 2;
7724            }
7725
7726            bounds.right = bounds.left + drawableWidth;
7727            bounds.bottom = bounds.top + drawableHeight;
7728
7729            convertFromViewportToContentCoordinates(bounds);
7730            mDrawable.setBounds(bounds);
7731            postInvalidate();
7732        }
7733
7734        boolean hasFingerOn(float x, float y) {
7735            // Simulate a 'fat finger' to ease grabbing of the controller.
7736            // Expands according to controller image size instead of using dip distance.
7737            // Assumes controller imager has a sensible size, proportionnal to screen density.
7738            final int drawableWidth = mDrawable.getIntrinsicWidth();
7739            final Rect fingerRect = sCursorControllerTempRect;
7740            fingerRect.set((int) (x - drawableWidth / 2.0),
7741                           (int) (y - mBottomExtension),
7742                           (int) (x + drawableWidth / 2.0),
7743                           (int) (y + mTopExtension));
7744            fingerRect.offset(mScrollX, mScrollY);
7745            return Rect.intersects(mDrawable.getBounds(), fingerRect);
7746        }
7747
7748        void postInvalidate() {
7749            final Rect bounds = mDrawable.getBounds();
7750            TextView.this.postInvalidate(bounds.left, bounds.top, bounds.right, bounds.bottom);
7751        }
7752
7753        void postInvalidateDelayed(long delay) {
7754            final Rect bounds = mDrawable.getBounds();
7755            TextView.this.postInvalidateDelayed(delay, bounds.left, bounds.top,
7756                                                       bounds.right, bounds.bottom);
7757        }
7758    }
7759
7760    class InsertionPointCursorController implements CursorController {
7761        private static final int DELAY_BEFORE_FADE_OUT = 2100;
7762
7763        // Whether or not the cursor control is currently visible
7764        private boolean mIsVisible = false;
7765        // Starting time of the fade timer
7766        private long mFadeOutTimerStart;
7767        // The cursor controller image
7768        private final Handle mHandle;
7769        // Used to detect a tap (vs drag) on the controller
7770        private long mOnDownTimerStart;
7771        // Offset between finger hot point on cursor controller and actual cursor
7772        private float mOffsetX, mOffsetY;
7773
7774        InsertionPointCursorController() {
7775            Resources res = mContext.getResources();
7776            mHandle = new Handle(res.getDrawable(mTextSelectHandleRes));
7777        }
7778
7779        public void show() {
7780            updateDrawablePosition();
7781            // Has to be done after updateDrawablePosition, so that previous position invalidate
7782            // in only done if necessary.
7783            mIsVisible = true;
7784            updateOverlay();
7785        }
7786
7787        public void hide() {
7788            if (mIsVisible) {
7789                long time = System.currentTimeMillis();
7790                // Start fading out, only if not already in progress
7791                if (time - mFadeOutTimerStart < DELAY_BEFORE_FADE_OUT) {
7792                    mFadeOutTimerStart = time - DELAY_BEFORE_FADE_OUT;
7793                    mHandle.postInvalidate();
7794                }
7795            }
7796        }
7797
7798        public boolean isShowing() {
7799            return mIsVisible;
7800        }
7801
7802        public void draw(Canvas canvas) {
7803            if (mIsVisible) {
7804                int time = (int) (System.currentTimeMillis() - mFadeOutTimerStart);
7805                if (time <= DELAY_BEFORE_FADE_OUT) {
7806                    mHandle.postInvalidateDelayed(DELAY_BEFORE_FADE_OUT - time);
7807                } else {
7808                    time -= DELAY_BEFORE_FADE_OUT;
7809                    if (time <= FADE_OUT_DURATION) {
7810                        final int alpha = (int)
7811                                         ((255.0 * (FADE_OUT_DURATION - time)) / FADE_OUT_DURATION);
7812                        mHandle.mDrawable.setAlpha(alpha);
7813                        mHandle.postInvalidateDelayed(30);
7814                    } else {
7815                        mHandle.mDrawable.setAlpha(0);
7816                        mIsVisible = false;
7817                        updateOverlay();
7818                    }
7819                }
7820                mHandle.mDrawable.draw(canvas);
7821            }
7822        }
7823
7824        public void updatePosition(int x, int y) {
7825            final int previousOffset = getSelectionStart();
7826            int offset = getHysteresisOffset(x, y, previousOffset);
7827
7828            if (offset != previousOffset) {
7829                Selection.setSelection((Spannable) mText, offset);
7830                updateDrawablePosition();
7831            }
7832        }
7833
7834        private void updateDrawablePosition() {
7835            if (mIsVisible) {
7836                // Clear previous cursor controller before bounds are updated
7837                mHandle.postInvalidate();
7838            }
7839
7840            final int offset = getSelectionStart();
7841
7842            if (offset < 0) {
7843                // Should never happen, safety check.
7844                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
7845                mIsVisible = false;
7846                updateOverlay();
7847                return;
7848            }
7849
7850            mHandle.positionAtCursor(offset, true);
7851
7852            mFadeOutTimerStart = System.currentTimeMillis();
7853            mHandle.mDrawable.setAlpha(255);
7854        }
7855
7856        public boolean onTouchEvent(MotionEvent event) {
7857            if (isFocused() && isTextEditable() && mIsVisible) {
7858                switch (event.getActionMasked()) {
7859                    case MotionEvent.ACTION_DOWN : {
7860                        final float x = event.getX();
7861                        final float y = event.getY();
7862
7863                        if (mHandle.hasFingerOn(x, y)) {
7864                            show();
7865
7866                            if (mMovement instanceof ArrowKeyMovementMethod) {
7867                                ((ArrowKeyMovementMethod)mMovement).setCursorController(this);
7868                            }
7869
7870                            if (mParent != null) {
7871                                // Prevent possible scrollView parent from scrolling, so that
7872                                // we can use auto-scrolling.
7873                                mParent.requestDisallowInterceptTouchEvent(true);
7874                            }
7875
7876                            final Rect bounds = mHandle.mDrawable.getBounds();
7877                            mOffsetX = (bounds.left + bounds.right) / 2.0f - x;
7878                            mOffsetY = mHandle.mHotSpotVerticalPosition - y;
7879
7880                            mOffsetX += viewportToContentHorizontalOffset();
7881                            mOffsetY += viewportToContentVerticalOffset();
7882
7883                            mOnDownTimerStart = event.getEventTime();
7884                            return true;
7885                        }
7886                        return false;
7887                    }
7888
7889                    case MotionEvent.ACTION_UP : {
7890                        int time = (int) (event.getEventTime() - mOnDownTimerStart);
7891
7892                        if (time <= ViewConfiguration.getTapTimeout()) {
7893                            // A tap on the controller (not a drag) will move the cursor
7894                            int offset = getOffset((int) event.getX(), (int) event.getY());
7895                            Selection.setSelection((Spannable) mText, offset);
7896
7897                            // Modified by cancelLongPress and prevents the cursor from changing
7898                            mScrolled = false;
7899                        }
7900                        break;
7901                    }
7902                }
7903            }
7904            return false;
7905        }
7906
7907        public float getOffsetX() {
7908            return mOffsetX;
7909        }
7910
7911        public float getOffsetY() {
7912            return mOffsetY;
7913        }
7914    }
7915
7916    class SelectionModifierCursorController implements CursorController {
7917        // Whether or not the selection controls are currently visible
7918        private boolean mIsVisible = false;
7919        // Whether that start or the end of selection controller is dragged
7920        private boolean mStartIsDragged = false;
7921        // Starting time of the fade timer
7922        private long mFadeOutTimerStart;
7923        // Used to detect a tap (vs drag) on the controller
7924        private long mOnDownTimerStart;
7925        // The cursor controller images
7926        private final Handle mStartHandle, mEndHandle;
7927        // Offset between finger hot point on active cursor controller and actual cursor
7928        private float mOffsetX, mOffsetY;
7929        // The offsets of that last touch down event. Remembered to start selection there.
7930        private int mMinTouchOffset, mMaxTouchOffset;
7931
7932        SelectionModifierCursorController() {
7933            Resources res = mContext.getResources();
7934            mStartHandle = new Handle(res.getDrawable(mTextSelectHandleLeftRes));
7935            mEndHandle = new Handle(res.getDrawable(mTextSelectHandleRightRes));
7936        }
7937
7938        public void show() {
7939            updateDrawablesPositions();
7940            // Has to be done after updateDrawablePositions, so that previous position invalidate
7941            // in only done if necessary.
7942            mIsVisible = true;
7943            updateOverlay();
7944            mFadeOutTimerStart = -1;
7945            hideInsertionPointCursorController();
7946        }
7947
7948        public void hide() {
7949            if (mIsVisible && (mFadeOutTimerStart < 0)) {
7950                mFadeOutTimerStart = System.currentTimeMillis();
7951                mStartHandle.postInvalidate();
7952                mEndHandle.postInvalidate();
7953            }
7954        }
7955
7956        public boolean isShowing() {
7957            return mIsVisible;
7958        }
7959
7960        public void cancelFadeOutAnimation() {
7961            mIsVisible = false;
7962            updateOverlay();
7963            mStartHandle.postInvalidate();
7964            mEndHandle.postInvalidate();
7965        }
7966
7967        public void draw(Canvas canvas) {
7968            if (mIsVisible) {
7969                if (mFadeOutTimerStart >= 0) {
7970                    int time = (int) (System.currentTimeMillis() - mFadeOutTimerStart);
7971                    if (time <= FADE_OUT_DURATION) {
7972                        final int alpha = 255 * (FADE_OUT_DURATION - time) / FADE_OUT_DURATION;
7973                        mStartHandle.mDrawable.setAlpha(alpha);
7974                        mEndHandle.mDrawable.setAlpha(alpha);
7975                        mStartHandle.postInvalidateDelayed(30);
7976                        mEndHandle.postInvalidateDelayed(30);
7977                    } else {
7978                        mStartHandle.mDrawable.setAlpha(0);
7979                        mEndHandle.mDrawable.setAlpha(0);
7980                        mIsVisible = false;
7981                        updateOverlay();
7982                    }
7983                }
7984                mStartHandle.mDrawable.draw(canvas);
7985                mEndHandle.mDrawable.draw(canvas);
7986            }
7987        }
7988
7989        public void updatePosition(int x, int y) {
7990            int selectionStart = getSelectionStart();
7991            int selectionEnd = getSelectionEnd();
7992
7993            final int previousOffset = mStartIsDragged ? selectionStart : selectionEnd;
7994            int offset = getHysteresisOffset(x, y, previousOffset);
7995
7996            // Handle the case where start and end are swapped, making sure start <= end
7997            if (mStartIsDragged) {
7998                if (offset <= selectionEnd) {
7999                    if (selectionStart == offset) {
8000                        return; // no change, no need to redraw;
8001                    }
8002                    selectionStart = offset;
8003                } else {
8004                    selectionStart = selectionEnd;
8005                    selectionEnd = offset;
8006                    mStartIsDragged = false;
8007                }
8008            } else {
8009                if (offset >= selectionStart) {
8010                    if (selectionEnd == offset) {
8011                        return; // no change, no need to redraw;
8012                    }
8013                    selectionEnd = offset;
8014                } else {
8015                    selectionEnd = selectionStart;
8016                    selectionStart = offset;
8017                    mStartIsDragged = true;
8018                }
8019            }
8020
8021            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8022            updateDrawablesPositions();
8023        }
8024
8025        private void updateDrawablesPositions() {
8026            if (mIsVisible) {
8027                // Clear previous cursor controller before bounds are updated
8028                mStartHandle.postInvalidate();
8029                mEndHandle.postInvalidate();
8030            }
8031
8032            final int selectionStart = getSelectionStart();
8033            final int selectionEnd = getSelectionEnd();
8034
8035            if ((selectionStart < 0) || (selectionEnd < 0)) {
8036                // Should never happen, safety check.
8037                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
8038                mIsVisible = false;
8039                updateOverlay();
8040                return;
8041            }
8042
8043            boolean oneLineSelection = mLayout.getLineForOffset(selectionStart) ==
8044                mLayout.getLineForOffset(selectionEnd);
8045            mStartHandle.positionAtCursor(selectionStart, oneLineSelection);
8046            mEndHandle.positionAtCursor(selectionEnd, true);
8047
8048            mStartHandle.mDrawable.setAlpha(255);
8049            mEndHandle.mDrawable.setAlpha(255);
8050        }
8051
8052        public boolean onTouchEvent(MotionEvent event) {
8053            if (isTextEditable()) {
8054                switch (event.getActionMasked()) {
8055                    case MotionEvent.ACTION_DOWN:
8056                        final int x = (int) event.getX();
8057                        final int y = (int) event.getY();
8058
8059                        // Remember finger down position, to be able to start selection from there
8060                        mMinTouchOffset = mMaxTouchOffset = mLastTouchOffset = getOffset(x, y);
8061
8062                        if (mIsVisible) {
8063                            if (mMovement instanceof ArrowKeyMovementMethod) {
8064                                boolean isOnStart = mStartHandle.hasFingerOn(x, y);
8065                                boolean isOnEnd = mEndHandle.hasFingerOn(x, y);
8066                                if (isOnStart || isOnEnd) {
8067                                    if (mParent != null) {
8068                                        // Prevent possible scrollView parent from scrolling, so
8069                                        // that we can use auto-scrolling.
8070                                        mParent.requestDisallowInterceptTouchEvent(true);
8071                                    }
8072
8073                                    // In case both controllers are under finger (very small
8074                                    // selection region), arbitrarily pick end controller.
8075                                    mStartIsDragged = !isOnEnd;
8076                                    final Handle draggedHandle =
8077                                        mStartIsDragged ? mStartHandle : mEndHandle;
8078                                    final Rect bounds = draggedHandle.mDrawable.getBounds();
8079                                    mOffsetX = (bounds.left + bounds.right) / 2.0f - x;
8080                                    mOffsetY = draggedHandle.mHotSpotVerticalPosition - y;
8081
8082                                    mOffsetX += viewportToContentHorizontalOffset();
8083                                    mOffsetY += viewportToContentVerticalOffset();
8084
8085                                    mOnDownTimerStart = event.getEventTime();
8086                                    ((ArrowKeyMovementMethod)mMovement).setCursorController(this);
8087                                    return true;
8088                                }
8089                            }
8090                        }
8091                        break;
8092
8093                    case MotionEvent.ACTION_UP:
8094                        int time = (int) (event.getEventTime() - mOnDownTimerStart);
8095
8096                        if (time <= ViewConfiguration.getTapTimeout()) {
8097                            // A tap on the controller (not a drag) opens the contextual Copy menu
8098                            showContextMenu();
8099                        }
8100                        break;
8101
8102                    case MotionEvent.ACTION_POINTER_DOWN:
8103                    case MotionEvent.ACTION_POINTER_UP:
8104                        // Handle multi-point gestures. Keep min and max offset positions.
8105                        // Only activated for devices that correctly handle multi-touch.
8106                        if (mContext.getPackageManager().hasSystemFeature(
8107                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
8108                            updateMinAndMaxOffsets(event);
8109                        }
8110                        break;
8111                }
8112            }
8113            return false;
8114        }
8115
8116        /**
8117         * @param event
8118         */
8119        private void updateMinAndMaxOffsets(MotionEvent event) {
8120            int pointerCount = event.getPointerCount();
8121            for (int index = 0; index < pointerCount; index++) {
8122                final int x = (int) event.getX(index);
8123                final int y = (int) event.getY(index);
8124                int offset = getOffset(x, y);
8125                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
8126                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
8127            }
8128        }
8129
8130        public int getMinTouchOffset() {
8131            return mMinTouchOffset;
8132        }
8133
8134        public int getMaxTouchOffset() {
8135            return mMaxTouchOffset;
8136        }
8137
8138        public float getOffsetX() {
8139            return mOffsetX;
8140        }
8141
8142        public float getOffsetY() {
8143            return mOffsetY;
8144        }
8145
8146        /**
8147         * @return true iff this controller is currently used to move the selection start.
8148         */
8149        public boolean isSelectionStartDragged() {
8150            return mIsVisible && mStartIsDragged;
8151        }
8152    }
8153
8154    private void hideInsertionPointCursorController() {
8155        if (mInsertionPointCursorController != null) {
8156            mInsertionPointCursorController.hide();
8157        }
8158    }
8159
8160    private void hideControllers() {
8161        hideInsertionPointCursorController();
8162        stopTextSelectionMode();
8163    }
8164
8165    private int getOffsetForHorizontal(int line, int x) {
8166        x -= getTotalPaddingLeft();
8167        // Clamp the position to inside of the view.
8168        x = Math.max(0, x);
8169        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
8170        x += getScrollX();
8171        return getLayout().getOffsetForHorizontal(line, x);
8172    }
8173
8174    /**
8175     * Get the offset character closest to the specified absolute position.
8176     *
8177     * @param x The horizontal absolute position of a point on screen
8178     * @param y The vertical absolute position of a point on screen
8179     * @return the character offset for the character whose position is closest to the specified
8180     *  position. Returns -1 if there is no layout.
8181     *
8182     * @hide
8183     */
8184    public int getOffset(int x, int y) {
8185        if (getLayout() == null) return -1;
8186
8187        y -= getTotalPaddingTop();
8188        // Clamp the position to inside of the view.
8189        y = Math.max(0, y);
8190        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8191        y += getScrollY();
8192
8193        final int line = getLayout().getLineForVertical(y);
8194        final int offset = getOffsetForHorizontal(line, x);
8195        return offset;
8196    }
8197
8198    int getHysteresisOffset(int x, int y, int previousOffset) {
8199        final Layout layout = getLayout();
8200        if (layout == null) return -1;
8201
8202        y -= getTotalPaddingTop();
8203        // Clamp the position to inside of the view.
8204        y = Math.max(0, y);
8205        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8206        y += getScrollY();
8207
8208        int line = getLayout().getLineForVertical(y);
8209
8210        final int previousLine = layout.getLineForOffset(previousOffset);
8211        final int previousLineTop = layout.getLineTop(previousLine);
8212        final int previousLineBottom = layout.getLineBottom(previousLine);
8213        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 2;
8214
8215        // If new line is just before or after previous line and y position is less than
8216        // hysteresisThreshold away from previous line, keep cursor on previous line.
8217        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
8218            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
8219            line = previousLine;
8220        }
8221
8222        return getOffsetForHorizontal(line, x);
8223    }
8224
8225    @ViewDebug.ExportedProperty
8226    private CharSequence            mText;
8227    private CharSequence            mTransformed;
8228    private BufferType              mBufferType = BufferType.NORMAL;
8229
8230    private int                     mInputType = EditorInfo.TYPE_NULL;
8231    private CharSequence            mHint;
8232    private Layout                  mHintLayout;
8233
8234    private KeyListener             mInput;
8235
8236    private MovementMethod          mMovement;
8237    private TransformationMethod    mTransformation;
8238    private ChangeWatcher           mChangeWatcher;
8239
8240    private ArrayList<TextWatcher>  mListeners = null;
8241
8242    // display attributes
8243    private final TextPaint         mTextPaint;
8244    private boolean                 mUserSetTextScaleX;
8245    private final Paint             mHighlightPaint;
8246    private int                     mHighlightColor = 0xCC475925;
8247    private Layout                  mLayout;
8248
8249    private long                    mShowCursor;
8250    private Blink                   mBlink;
8251    private boolean                 mCursorVisible = true;
8252
8253    // Cursor Controllers. Null when disabled.
8254    private CursorController        mInsertionPointCursorController;
8255    private CursorController        mSelectionModifierCursorController;
8256    private boolean                 mIsInTextSelectionMode = false;
8257    private int                     mLastTouchOffset = -1;
8258    // Created once and shared by different CursorController helper methods.
8259    // Only one cursor controller is active at any time which prevent race conditions.
8260    private static Rect             sCursorControllerTempRect = new Rect();
8261
8262    private boolean                 mSelectAllOnFocus = false;
8263
8264    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
8265    private boolean                 mHorizontallyScrolling;
8266
8267    private int                     mAutoLinkMask;
8268    private boolean                 mLinksClickable = true;
8269
8270    private float                   mSpacingMult = 1;
8271    private float                   mSpacingAdd = 0;
8272
8273    private static final int        LINES = 1;
8274    private static final int        EMS = LINES;
8275    private static final int        PIXELS = 2;
8276
8277    private int                     mMaximum = Integer.MAX_VALUE;
8278    private int                     mMaxMode = LINES;
8279    private int                     mMinimum = 0;
8280    private int                     mMinMode = LINES;
8281
8282    private int                     mMaxWidth = Integer.MAX_VALUE;
8283    private int                     mMaxWidthMode = PIXELS;
8284    private int                     mMinWidth = 0;
8285    private int                     mMinWidthMode = PIXELS;
8286
8287    private boolean                 mSingleLine;
8288    private int                     mDesiredHeightAtMeasure = -1;
8289    private boolean                 mIncludePad = true;
8290
8291    // tmp primitives, so we don't alloc them on each draw
8292    private Path                    mHighlightPath;
8293    private boolean                 mHighlightPathBogus = true;
8294    private static final RectF      sTempRect = new RectF();
8295
8296    // XXX should be much larger
8297    private static final int        VERY_WIDE = 16384;
8298
8299    private static final int        BLINK = 500;
8300
8301    private static final int ANIMATED_SCROLL_GAP = 250;
8302    private long mLastScroll;
8303    private Scroller mScroller = null;
8304
8305    private BoringLayout.Metrics mBoring;
8306    private BoringLayout.Metrics mHintBoring;
8307
8308    private BoringLayout mSavedLayout, mSavedHintLayout;
8309
8310    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
8311    private InputFilter[] mFilters = NO_FILTERS;
8312    private static final Spanned EMPTY_SPANNED = new SpannedString("");
8313}
8314