TextView.java revision 528c64887e01dd6a9d802d657838499b9fac0cb2 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import com.android.internal.util.FastMath;
20import com.android.internal.widget.EditableInputConnection;
21
22import org.xmlpull.v1.XmlPullParserException;
23
24import android.content.Context;
25import android.content.Intent;
26import android.content.pm.PackageManager;
27import android.content.res.ColorStateList;
28import android.content.res.Resources;
29import android.content.res.TypedArray;
30import android.content.res.XmlResourceParser;
31import android.graphics.Canvas;
32import android.graphics.Paint;
33import android.graphics.Path;
34import android.graphics.Rect;
35import android.graphics.RectF;
36import android.graphics.Typeface;
37import android.graphics.drawable.Drawable;
38import android.inputmethodservice.ExtractEditText;
39import android.os.Bundle;
40import android.os.Handler;
41import android.os.Message;
42import android.os.Parcel;
43import android.os.Parcelable;
44import android.os.ResultReceiver;
45import android.os.SystemClock;
46import android.text.BoringLayout;
47import android.text.ClipboardManager;
48import android.text.DynamicLayout;
49import android.text.Editable;
50import android.text.GetChars;
51import android.text.GraphicsOperations;
52import android.text.InputFilter;
53import android.text.InputType;
54import android.text.Layout;
55import android.text.ParcelableSpan;
56import android.text.Selection;
57import android.text.SpanWatcher;
58import android.text.Spannable;
59import android.text.SpannableString;
60import android.text.Spanned;
61import android.text.SpannedString;
62import android.text.StaticLayout;
63import android.text.TextPaint;
64import android.text.TextUtils;
65import android.text.TextWatcher;
66import android.text.method.DateKeyListener;
67import android.text.method.DateTimeKeyListener;
68import android.text.method.DialerKeyListener;
69import android.text.method.DigitsKeyListener;
70import android.text.method.KeyListener;
71import android.text.method.LinkMovementMethod;
72import android.text.method.MetaKeyKeyListener;
73import android.text.method.MovementMethod;
74import android.text.method.PasswordTransformationMethod;
75import android.text.method.SingleLineTransformationMethod;
76import android.text.method.TextKeyListener;
77import android.text.method.TimeKeyListener;
78import android.text.method.TransformationMethod;
79import android.text.style.ParagraphStyle;
80import android.text.style.URLSpan;
81import android.text.style.UpdateAppearance;
82import android.text.util.Linkify;
83import android.util.AttributeSet;
84import android.util.FloatMath;
85import android.util.Log;
86import android.util.TypedValue;
87import android.view.ContextMenu;
88import android.view.Gravity;
89import android.view.KeyEvent;
90import android.view.LayoutInflater;
91import android.view.MenuItem;
92import android.view.MotionEvent;
93import android.view.View;
94import android.view.ViewDebug;
95import android.view.ViewGroup.LayoutParams;
96import android.view.ViewParent;
97import android.view.ViewRoot;
98import android.view.ViewTreeObserver;
99import android.view.WindowManager;
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    final int[] mTempCoords = new int[2];
198    Rect mTempRect;
199
200    private ColorStateList mTextColor;
201    private int mCurTextColor;
202    private ColorStateList mHintTextColor;
203    private ColorStateList mLinkTextColor;
204    private int mCurHintTextColor;
205    private boolean mFreezesText;
206    private boolean mFrozenWithFocus;
207    private boolean mTemporaryDetach;
208    private boolean mDispatchTemporaryDetach;
209
210    private boolean mEatTouchRelease = false;
211    private boolean mScrolled = false;
212
213    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
214    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
215
216    private float mShadowRadius, mShadowDx, mShadowDy;
217
218    private static final int PREDRAW_NOT_REGISTERED = 0;
219    private static final int PREDRAW_PENDING = 1;
220    private static final int PREDRAW_DONE = 2;
221    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
222
223    private TextUtils.TruncateAt mEllipsize = null;
224
225    // Enum for the "typeface" XML parameter.
226    // TODO: How can we get this from the XML instead of hardcoding it here?
227    private static final int SANS = 1;
228    private static final int SERIF = 2;
229    private static final int MONOSPACE = 3;
230
231    // Bitfield for the "numeric" XML parameter.
232    // TODO: How can we get this from the XML instead of hardcoding it here?
233    private static final int SIGNED = 2;
234    private static final int DECIMAL = 4;
235
236    class Drawables {
237        final Rect mCompoundRect = new Rect();
238        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
239        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
240        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
241        int mDrawablePadding;
242    }
243    private Drawables mDrawables;
244
245    private CharSequence mError;
246    private boolean mErrorWasChanged;
247    private ErrorPopup mPopup;
248    /**
249     * This flag is set if the TextView tries to display an error before it
250     * is attached to the window (so its position is still unknown).
251     * It causes the error to be shown later, when onAttachedToWindow()
252     * is called.
253     */
254    private boolean mShowErrorAfterAttach;
255
256    private CharWrapper mCharWrapper = null;
257
258    private boolean mSelectionMoved = false;
259    private boolean mTouchFocusSelected = false;
260
261    private Marquee mMarquee;
262    private boolean mRestartMarquee;
263
264    private int mMarqueeRepeatLimit = 3;
265
266    class InputContentType {
267        int imeOptions = EditorInfo.IME_NULL;
268        String privateImeOptions;
269        CharSequence imeActionLabel;
270        int imeActionId;
271        Bundle extras;
272        OnEditorActionListener onEditorActionListener;
273        boolean enterDown;
274    }
275    InputContentType mInputContentType;
276
277    class InputMethodState {
278        Rect mCursorRectInWindow = new Rect();
279        RectF mTmpRectF = new RectF();
280        float[] mTmpOffset = new float[2];
281        ExtractedTextRequest mExtracting;
282        final ExtractedText mTmpExtracted = new ExtractedText();
283        int mBatchEditNesting;
284        boolean mCursorChanged;
285        boolean mSelectionModeChanged;
286        boolean mContentChanged;
287        int mChangedStart, mChangedEnd, mChangedDelta;
288    }
289    InputMethodState mInputMethodState;
290
291    int mTextSelectHandleLeftRes;
292    int mTextSelectHandleRightRes;
293    int mTextSelectHandleRes;
294
295    Drawable mSelectHandleLeft;
296    Drawable mSelectHandleRight;
297    Drawable mSelectHandleCenter;
298
299    /*
300     * Kick-start the font cache for the zygote process (to pay the cost of
301     * initializing freetype for our default font only once).
302     */
303    static {
304        Paint p = new Paint();
305        p.setAntiAlias(true);
306        // We don't care about the result, just the side-effect of measuring.
307        p.measureText("H");
308    }
309
310    /**
311     * Interface definition for a callback to be invoked when an action is
312     * performed on the editor.
313     */
314    public interface OnEditorActionListener {
315        /**
316         * Called when an action is being performed.
317         *
318         * @param v The view that was clicked.
319         * @param actionId Identifier of the action.  This will be either the
320         * identifier you supplied, or {@link EditorInfo#IME_NULL
321         * EditorInfo.IME_NULL} if being called due to the enter key
322         * being pressed.
323         * @param event If triggered by an enter key, this is the event;
324         * otherwise, this is null.
325         * @return Return true if you have consumed the action, else false.
326         */
327        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
328    }
329
330    public TextView(Context context) {
331        this(context, null);
332    }
333
334    public TextView(Context context,
335                    AttributeSet attrs) {
336        this(context, attrs, com.android.internal.R.attr.textViewStyle);
337    }
338
339    @SuppressWarnings("deprecation")
340    public TextView(Context context,
341                    AttributeSet attrs,
342                    int defStyle) {
343        super(context, attrs, defStyle);
344        mText = "";
345
346        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
347        mTextPaint.density = getResources().getDisplayMetrics().density;
348        mTextPaint.setCompatibilityScaling(
349                getResources().getCompatibilityInfo().applicationScale);
350
351        // If we get the paint from the skin, we should set it to left, since
352        // the layout always wants it to be left.
353        // mTextPaint.setTextAlign(Paint.Align.LEFT);
354
355        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
356        mHighlightPaint.setCompatibilityScaling(
357                getResources().getCompatibilityInfo().applicationScale);
358
359        mMovement = getDefaultMovementMethod();
360        mTransformation = null;
361
362        TypedArray a =
363            context.obtainStyledAttributes(
364                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
365
366        int textColorHighlight = 0;
367        ColorStateList textColor = null;
368        ColorStateList textColorHint = null;
369        ColorStateList textColorLink = null;
370        int textSize = 15;
371        int typefaceIndex = -1;
372        int styleIndex = -1;
373
374        /*
375         * Look the appearance up without checking first if it exists because
376         * almost every TextView has one and it greatly simplifies the logic
377         * to be able to parse the appearance first and then let specific tags
378         * for this View override it.
379         */
380        TypedArray appearance = null;
381        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
382        if (ap != -1) {
383            appearance = context.obtainStyledAttributes(ap,
384                                com.android.internal.R.styleable.
385                                TextAppearance);
386        }
387        if (appearance != null) {
388            int n = appearance.getIndexCount();
389            for (int i = 0; i < n; i++) {
390                int attr = appearance.getIndex(i);
391
392                switch (attr) {
393                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
394                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
395                    break;
396
397                case com.android.internal.R.styleable.TextAppearance_textColor:
398                    textColor = appearance.getColorStateList(attr);
399                    break;
400
401                case com.android.internal.R.styleable.TextAppearance_textColorHint:
402                    textColorHint = appearance.getColorStateList(attr);
403                    break;
404
405                case com.android.internal.R.styleable.TextAppearance_textColorLink:
406                    textColorLink = appearance.getColorStateList(attr);
407                    break;
408
409                case com.android.internal.R.styleable.TextAppearance_textSize:
410                    textSize = appearance.getDimensionPixelSize(attr, textSize);
411                    break;
412
413                case com.android.internal.R.styleable.TextAppearance_typeface:
414                    typefaceIndex = appearance.getInt(attr, -1);
415                    break;
416
417                case com.android.internal.R.styleable.TextAppearance_textStyle:
418                    styleIndex = appearance.getInt(attr, -1);
419                    break;
420                }
421            }
422
423            appearance.recycle();
424        }
425
426        boolean editable = getDefaultEditable();
427        CharSequence inputMethod = null;
428        int numeric = 0;
429        CharSequence digits = null;
430        boolean phone = false;
431        boolean autotext = false;
432        int autocap = -1;
433        int buffertype = 0;
434        boolean selectallonfocus = false;
435        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
436            drawableBottom = null;
437        int drawablePadding = 0;
438        int ellipsize = -1;
439        boolean singleLine = false;
440        int maxlength = -1;
441        CharSequence text = "";
442        CharSequence hint = null;
443        int shadowcolor = 0;
444        float dx = 0, dy = 0, r = 0;
445        boolean password = false;
446        int inputType = EditorInfo.TYPE_NULL;
447
448        int n = a.getIndexCount();
449        for (int i = 0; i < n; i++) {
450            int attr = a.getIndex(i);
451
452            switch (attr) {
453            case com.android.internal.R.styleable.TextView_editable:
454                editable = a.getBoolean(attr, editable);
455                break;
456
457            case com.android.internal.R.styleable.TextView_inputMethod:
458                inputMethod = a.getText(attr);
459                break;
460
461            case com.android.internal.R.styleable.TextView_numeric:
462                numeric = a.getInt(attr, numeric);
463                break;
464
465            case com.android.internal.R.styleable.TextView_digits:
466                digits = a.getText(attr);
467                break;
468
469            case com.android.internal.R.styleable.TextView_phoneNumber:
470                phone = a.getBoolean(attr, phone);
471                break;
472
473            case com.android.internal.R.styleable.TextView_autoText:
474                autotext = a.getBoolean(attr, autotext);
475                break;
476
477            case com.android.internal.R.styleable.TextView_capitalize:
478                autocap = a.getInt(attr, autocap);
479                break;
480
481            case com.android.internal.R.styleable.TextView_bufferType:
482                buffertype = a.getInt(attr, buffertype);
483                break;
484
485            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
486                selectallonfocus = a.getBoolean(attr, selectallonfocus);
487                break;
488
489            case com.android.internal.R.styleable.TextView_autoLink:
490                mAutoLinkMask = a.getInt(attr, 0);
491                break;
492
493            case com.android.internal.R.styleable.TextView_linksClickable:
494                mLinksClickable = a.getBoolean(attr, true);
495                break;
496
497            case com.android.internal.R.styleable.TextView_drawableLeft:
498                drawableLeft = a.getDrawable(attr);
499                break;
500
501            case com.android.internal.R.styleable.TextView_drawableTop:
502                drawableTop = a.getDrawable(attr);
503                break;
504
505            case com.android.internal.R.styleable.TextView_drawableRight:
506                drawableRight = a.getDrawable(attr);
507                break;
508
509            case com.android.internal.R.styleable.TextView_drawableBottom:
510                drawableBottom = a.getDrawable(attr);
511                break;
512
513            case com.android.internal.R.styleable.TextView_drawablePadding:
514                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
515                break;
516
517            case com.android.internal.R.styleable.TextView_maxLines:
518                setMaxLines(a.getInt(attr, -1));
519                break;
520
521            case com.android.internal.R.styleable.TextView_maxHeight:
522                setMaxHeight(a.getDimensionPixelSize(attr, -1));
523                break;
524
525            case com.android.internal.R.styleable.TextView_lines:
526                setLines(a.getInt(attr, -1));
527                break;
528
529            case com.android.internal.R.styleable.TextView_height:
530                setHeight(a.getDimensionPixelSize(attr, -1));
531                break;
532
533            case com.android.internal.R.styleable.TextView_minLines:
534                setMinLines(a.getInt(attr, -1));
535                break;
536
537            case com.android.internal.R.styleable.TextView_minHeight:
538                setMinHeight(a.getDimensionPixelSize(attr, -1));
539                break;
540
541            case com.android.internal.R.styleable.TextView_maxEms:
542                setMaxEms(a.getInt(attr, -1));
543                break;
544
545            case com.android.internal.R.styleable.TextView_maxWidth:
546                setMaxWidth(a.getDimensionPixelSize(attr, -1));
547                break;
548
549            case com.android.internal.R.styleable.TextView_ems:
550                setEms(a.getInt(attr, -1));
551                break;
552
553            case com.android.internal.R.styleable.TextView_width:
554                setWidth(a.getDimensionPixelSize(attr, -1));
555                break;
556
557            case com.android.internal.R.styleable.TextView_minEms:
558                setMinEms(a.getInt(attr, -1));
559                break;
560
561            case com.android.internal.R.styleable.TextView_minWidth:
562                setMinWidth(a.getDimensionPixelSize(attr, -1));
563                break;
564
565            case com.android.internal.R.styleable.TextView_gravity:
566                setGravity(a.getInt(attr, -1));
567                break;
568
569            case com.android.internal.R.styleable.TextView_hint:
570                hint = a.getText(attr);
571                break;
572
573            case com.android.internal.R.styleable.TextView_text:
574                text = a.getText(attr);
575                break;
576
577            case com.android.internal.R.styleable.TextView_scrollHorizontally:
578                if (a.getBoolean(attr, false)) {
579                    setHorizontallyScrolling(true);
580                }
581                break;
582
583            case com.android.internal.R.styleable.TextView_singleLine:
584                singleLine = a.getBoolean(attr, singleLine);
585                break;
586
587            case com.android.internal.R.styleable.TextView_ellipsize:
588                ellipsize = a.getInt(attr, ellipsize);
589                break;
590
591            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
592                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
593                break;
594
595            case com.android.internal.R.styleable.TextView_includeFontPadding:
596                if (!a.getBoolean(attr, true)) {
597                    setIncludeFontPadding(false);
598                }
599                break;
600
601            case com.android.internal.R.styleable.TextView_cursorVisible:
602                if (!a.getBoolean(attr, true)) {
603                    setCursorVisible(false);
604                }
605                break;
606
607            case com.android.internal.R.styleable.TextView_maxLength:
608                maxlength = a.getInt(attr, -1);
609                break;
610
611            case com.android.internal.R.styleable.TextView_textScaleX:
612                setTextScaleX(a.getFloat(attr, 1.0f));
613                break;
614
615            case com.android.internal.R.styleable.TextView_freezesText:
616                mFreezesText = a.getBoolean(attr, false);
617                break;
618
619            case com.android.internal.R.styleable.TextView_shadowColor:
620                shadowcolor = a.getInt(attr, 0);
621                break;
622
623            case com.android.internal.R.styleable.TextView_shadowDx:
624                dx = a.getFloat(attr, 0);
625                break;
626
627            case com.android.internal.R.styleable.TextView_shadowDy:
628                dy = a.getFloat(attr, 0);
629                break;
630
631            case com.android.internal.R.styleable.TextView_shadowRadius:
632                r = a.getFloat(attr, 0);
633                break;
634
635            case com.android.internal.R.styleable.TextView_enabled:
636                setEnabled(a.getBoolean(attr, isEnabled()));
637                break;
638
639            case com.android.internal.R.styleable.TextView_textColorHighlight:
640                textColorHighlight = a.getColor(attr, textColorHighlight);
641                break;
642
643            case com.android.internal.R.styleable.TextView_textColor:
644                textColor = a.getColorStateList(attr);
645                break;
646
647            case com.android.internal.R.styleable.TextView_textColorHint:
648                textColorHint = a.getColorStateList(attr);
649                break;
650
651            case com.android.internal.R.styleable.TextView_textColorLink:
652                textColorLink = a.getColorStateList(attr);
653                break;
654
655            case com.android.internal.R.styleable.TextView_textSize:
656                textSize = a.getDimensionPixelSize(attr, textSize);
657                break;
658
659            case com.android.internal.R.styleable.TextView_typeface:
660                typefaceIndex = a.getInt(attr, typefaceIndex);
661                break;
662
663            case com.android.internal.R.styleable.TextView_textStyle:
664                styleIndex = a.getInt(attr, styleIndex);
665                break;
666
667            case com.android.internal.R.styleable.TextView_password:
668                password = a.getBoolean(attr, password);
669                break;
670
671            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
672                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
673                break;
674
675            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
676                mSpacingMult = a.getFloat(attr, mSpacingMult);
677                break;
678
679            case com.android.internal.R.styleable.TextView_inputType:
680                inputType = a.getInt(attr, mInputType);
681                break;
682
683            case com.android.internal.R.styleable.TextView_imeOptions:
684                if (mInputContentType == null) {
685                    mInputContentType = new InputContentType();
686                }
687                mInputContentType.imeOptions = a.getInt(attr,
688                        mInputContentType.imeOptions);
689                break;
690
691            case com.android.internal.R.styleable.TextView_imeActionLabel:
692                if (mInputContentType == null) {
693                    mInputContentType = new InputContentType();
694                }
695                mInputContentType.imeActionLabel = a.getText(attr);
696                break;
697
698            case com.android.internal.R.styleable.TextView_imeActionId:
699                if (mInputContentType == null) {
700                    mInputContentType = new InputContentType();
701                }
702                mInputContentType.imeActionId = a.getInt(attr,
703                        mInputContentType.imeActionId);
704                break;
705
706            case com.android.internal.R.styleable.TextView_privateImeOptions:
707                setPrivateImeOptions(a.getString(attr));
708                break;
709
710            case com.android.internal.R.styleable.TextView_editorExtras:
711                try {
712                    setInputExtras(a.getResourceId(attr, 0));
713                } catch (XmlPullParserException e) {
714                    Log.w(LOG_TAG, "Failure reading input extras", e);
715                } catch (IOException e) {
716                    Log.w(LOG_TAG, "Failure reading input extras", e);
717                }
718                break;
719
720            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
721                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
722                break;
723
724            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
725                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
726                break;
727
728            case com.android.internal.R.styleable.TextView_textSelectHandle:
729                mTextSelectHandleRes = a.getResourceId(attr, 0);
730                break;
731            }
732        }
733        a.recycle();
734
735        BufferType bufferType = BufferType.EDITABLE;
736
737        if ((inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
738                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
739            password = true;
740        }
741
742        if (inputMethod != null) {
743            Class<?> c;
744
745            try {
746                c = Class.forName(inputMethod.toString());
747            } catch (ClassNotFoundException ex) {
748                throw new RuntimeException(ex);
749            }
750
751            try {
752                mInput = (KeyListener) c.newInstance();
753            } catch (InstantiationException ex) {
754                throw new RuntimeException(ex);
755            } catch (IllegalAccessException ex) {
756                throw new RuntimeException(ex);
757            }
758            try {
759                mInputType = inputType != EditorInfo.TYPE_NULL
760                        ? inputType
761                        : mInput.getInputType();
762            } catch (IncompatibleClassChangeError e) {
763                mInputType = EditorInfo.TYPE_CLASS_TEXT;
764            }
765        } else if (digits != null) {
766            mInput = DigitsKeyListener.getInstance(digits.toString());
767            // If no input type was specified, we will default to generic
768            // text, since we can't tell the IME about the set of digits
769            // that was selected.
770            mInputType = inputType != EditorInfo.TYPE_NULL
771                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
772        } else if (inputType != EditorInfo.TYPE_NULL) {
773            setInputType(inputType, true);
774            singleLine = (inputType&(EditorInfo.TYPE_MASK_CLASS
775                            | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) !=
776                    (EditorInfo.TYPE_CLASS_TEXT
777                            | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
778        } else if (phone) {
779            mInput = DialerKeyListener.getInstance();
780            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
781        } else if (numeric != 0) {
782            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
783                                                   (numeric & DECIMAL) != 0);
784            inputType = EditorInfo.TYPE_CLASS_NUMBER;
785            if ((numeric & SIGNED) != 0) {
786                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
787            }
788            if ((numeric & DECIMAL) != 0) {
789                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
790            }
791            mInputType = inputType;
792        } else if (autotext || autocap != -1) {
793            TextKeyListener.Capitalize cap;
794
795            inputType = EditorInfo.TYPE_CLASS_TEXT;
796            if (!singleLine) {
797                inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
798            }
799
800            switch (autocap) {
801            case 1:
802                cap = TextKeyListener.Capitalize.SENTENCES;
803                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
804                break;
805
806            case 2:
807                cap = TextKeyListener.Capitalize.WORDS;
808                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
809                break;
810
811            case 3:
812                cap = TextKeyListener.Capitalize.CHARACTERS;
813                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
814                break;
815
816            default:
817                cap = TextKeyListener.Capitalize.NONE;
818                break;
819            }
820
821            mInput = TextKeyListener.getInstance(autotext, cap);
822            mInputType = inputType;
823        } else if (editable) {
824            mInput = TextKeyListener.getInstance();
825            mInputType = EditorInfo.TYPE_CLASS_TEXT;
826            if (!singleLine) {
827                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
828            }
829        } else {
830            mInput = null;
831
832            switch (buffertype) {
833                case 0:
834                    bufferType = BufferType.NORMAL;
835                    break;
836                case 1:
837                    bufferType = BufferType.SPANNABLE;
838                    break;
839                case 2:
840                    bufferType = BufferType.EDITABLE;
841                    break;
842            }
843        }
844
845        if (password && (mInputType&EditorInfo.TYPE_MASK_CLASS)
846                == EditorInfo.TYPE_CLASS_TEXT) {
847            mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
848                | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
849        }
850
851        if (selectallonfocus) {
852            mSelectAllOnFocus = true;
853
854            if (bufferType == BufferType.NORMAL)
855                bufferType = BufferType.SPANNABLE;
856        }
857
858        setCompoundDrawablesWithIntrinsicBounds(
859            drawableLeft, drawableTop, drawableRight, drawableBottom);
860        setCompoundDrawablePadding(drawablePadding);
861
862        if (singleLine) {
863            setSingleLine();
864
865            if (mInput == null && ellipsize < 0) {
866                ellipsize = 3; // END
867            }
868        }
869
870        switch (ellipsize) {
871            case 1:
872                setEllipsize(TextUtils.TruncateAt.START);
873                break;
874            case 2:
875                setEllipsize(TextUtils.TruncateAt.MIDDLE);
876                break;
877            case 3:
878                setEllipsize(TextUtils.TruncateAt.END);
879                break;
880            case 4:
881                setHorizontalFadingEdgeEnabled(true);
882                setEllipsize(TextUtils.TruncateAt.MARQUEE);
883                break;
884        }
885
886        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
887        setHintTextColor(textColorHint);
888        setLinkTextColor(textColorLink);
889        if (textColorHighlight != 0) {
890            setHighlightColor(textColorHighlight);
891        }
892        setRawTextSize(textSize);
893
894        if (password) {
895            setTransformationMethod(PasswordTransformationMethod.getInstance());
896            typefaceIndex = MONOSPACE;
897        } else if ((mInputType&(EditorInfo.TYPE_MASK_CLASS
898                |EditorInfo.TYPE_MASK_VARIATION))
899                == (EditorInfo.TYPE_CLASS_TEXT
900                        |EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
901            typefaceIndex = MONOSPACE;
902        }
903
904        setTypefaceByIndex(typefaceIndex, styleIndex);
905
906        if (shadowcolor != 0) {
907            setShadowLayer(r, dx, dy, shadowcolor);
908        }
909
910        if (maxlength >= 0) {
911            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
912        } else {
913            setFilters(NO_FILTERS);
914        }
915
916        setText(text, bufferType);
917        if (hint != null) setHint(hint);
918
919        /*
920         * Views are not normally focusable unless specified to be.
921         * However, TextViews that have input or movement methods *are*
922         * focusable by default.
923         */
924        a = context.obtainStyledAttributes(attrs,
925                                           com.android.internal.R.styleable.View,
926                                           defStyle, 0);
927
928        boolean focusable = mMovement != null || mInput != null;
929        boolean clickable = focusable;
930        boolean longClickable = focusable;
931
932        n = a.getIndexCount();
933        for (int i = 0; i < n; i++) {
934            int attr = a.getIndex(i);
935
936            switch (attr) {
937            case com.android.internal.R.styleable.View_focusable:
938                focusable = a.getBoolean(attr, focusable);
939                break;
940
941            case com.android.internal.R.styleable.View_clickable:
942                clickable = a.getBoolean(attr, clickable);
943                break;
944
945            case com.android.internal.R.styleable.View_longClickable:
946                longClickable = a.getBoolean(attr, longClickable);
947                break;
948            }
949        }
950        a.recycle();
951
952        setFocusable(focusable);
953        setClickable(clickable);
954        setLongClickable(longClickable);
955
956        prepareCursorControllers();
957    }
958
959    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
960        Typeface tf = null;
961        switch (typefaceIndex) {
962            case SANS:
963                tf = Typeface.SANS_SERIF;
964                break;
965
966            case SERIF:
967                tf = Typeface.SERIF;
968                break;
969
970            case MONOSPACE:
971                tf = Typeface.MONOSPACE;
972                break;
973        }
974
975        setTypeface(tf, styleIndex);
976    }
977
978    /**
979     * Sets the typeface and style in which the text should be displayed,
980     * and turns on the fake bold and italic bits in the Paint if the
981     * Typeface that you provided does not have all the bits in the
982     * style that you specified.
983     *
984     * @attr ref android.R.styleable#TextView_typeface
985     * @attr ref android.R.styleable#TextView_textStyle
986     */
987    public void setTypeface(Typeface tf, int style) {
988        if (style > 0) {
989            if (tf == null) {
990                tf = Typeface.defaultFromStyle(style);
991            } else {
992                tf = Typeface.create(tf, style);
993            }
994
995            setTypeface(tf);
996            // now compute what (if any) algorithmic styling is needed
997            int typefaceStyle = tf != null ? tf.getStyle() : 0;
998            int need = style & ~typefaceStyle;
999            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1000            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1001        } else {
1002            mTextPaint.setFakeBoldText(false);
1003            mTextPaint.setTextSkewX(0);
1004            setTypeface(tf);
1005        }
1006    }
1007
1008    /**
1009     * Subclasses override this to specify that they have a KeyListener
1010     * by default even if not specifically called for in the XML options.
1011     */
1012    protected boolean getDefaultEditable() {
1013        return false;
1014    }
1015
1016    /**
1017     * Subclasses override this to specify a default movement method.
1018     */
1019    protected MovementMethod getDefaultMovementMethod() {
1020        return null;
1021    }
1022
1023    /**
1024     * Return the text the TextView is displaying. If setText() was called with
1025     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1026     * the return value from this method to Spannable or Editable, respectively.
1027     *
1028     * Note: The content of the return value should not be modified. If you want
1029     * a modifiable one, you should make your own copy first.
1030     */
1031    @ViewDebug.CapturedViewProperty
1032    public CharSequence getText() {
1033        return mText;
1034    }
1035
1036    /**
1037     * Returns the length, in characters, of the text managed by this TextView
1038     */
1039    public int length() {
1040        return mText.length();
1041    }
1042
1043    /**
1044     * Return the text the TextView is displaying as an Editable object.  If
1045     * the text is not editable, null is returned.
1046     *
1047     * @see #getText
1048     */
1049    public Editable getEditableText() {
1050        return (mText instanceof Editable) ? (Editable)mText : null;
1051    }
1052
1053    /**
1054     * @return the height of one standard line in pixels.  Note that markup
1055     * within the text can cause individual lines to be taller or shorter
1056     * than this height, and the layout may contain additional first-
1057     * or last-line padding.
1058     */
1059    public int getLineHeight() {
1060        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult
1061                          + mSpacingAdd);
1062    }
1063
1064    /**
1065     * @return the Layout that is currently being used to display the text.
1066     * This can be null if the text or width has recently changes.
1067     */
1068    public final Layout getLayout() {
1069        return mLayout;
1070    }
1071
1072    /**
1073     * @return the current key listener for this TextView.
1074     * This will frequently be null for non-EditText TextViews.
1075     */
1076    public final KeyListener getKeyListener() {
1077        return mInput;
1078    }
1079
1080    /**
1081     * Sets the key listener to be used with this TextView.  This can be null
1082     * to disallow user input.  Note that this method has significant and
1083     * subtle interactions with soft keyboards and other input method:
1084     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1085     * for important details.  Calling this method will replace the current
1086     * content type of the text view with the content type returned by the
1087     * key listener.
1088     * <p>
1089     * Be warned that if you want a TextView with a key listener or movement
1090     * method not to be focusable, or if you want a TextView without a
1091     * key listener or movement method to be focusable, you must call
1092     * {@link #setFocusable} again after calling this to get the focusability
1093     * back the way you want it.
1094     *
1095     * @attr ref android.R.styleable#TextView_numeric
1096     * @attr ref android.R.styleable#TextView_digits
1097     * @attr ref android.R.styleable#TextView_phoneNumber
1098     * @attr ref android.R.styleable#TextView_inputMethod
1099     * @attr ref android.R.styleable#TextView_capitalize
1100     * @attr ref android.R.styleable#TextView_autoText
1101     */
1102    public void setKeyListener(KeyListener input) {
1103        setKeyListenerOnly(input);
1104        fixFocusableAndClickableSettings();
1105
1106        if (input != null) {
1107            try {
1108                mInputType = mInput.getInputType();
1109            } catch (IncompatibleClassChangeError e) {
1110                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1111            }
1112            if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
1113                    == EditorInfo.TYPE_CLASS_TEXT) {
1114                if (mSingleLine) {
1115                    mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
1116                } else {
1117                    mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
1118                }
1119            }
1120        } else {
1121            mInputType = EditorInfo.TYPE_NULL;
1122        }
1123
1124        InputMethodManager imm = InputMethodManager.peekInstance();
1125        if (imm != null) imm.restartInput(this);
1126    }
1127
1128    private void setKeyListenerOnly(KeyListener input) {
1129        mInput = input;
1130        if (mInput != null && !(mText instanceof Editable))
1131            setText(mText);
1132
1133        setFilters((Editable) mText, mFilters);
1134    }
1135
1136    /**
1137     * @return the movement method being used for this TextView.
1138     * This will frequently be null for non-EditText TextViews.
1139     */
1140    public final MovementMethod getMovementMethod() {
1141        return mMovement;
1142    }
1143
1144    /**
1145     * Sets the movement method (arrow key handler) to be used for
1146     * this TextView.  This can be null to disallow using the arrow keys
1147     * to move the cursor or scroll the view.
1148     * <p>
1149     * Be warned that if you want a TextView with a key listener or movement
1150     * method not to be focusable, or if you want a TextView without a
1151     * key listener or movement method to be focusable, you must call
1152     * {@link #setFocusable} again after calling this to get the focusability
1153     * back the way you want it.
1154     */
1155    public final void setMovementMethod(MovementMethod movement) {
1156        mMovement = movement;
1157
1158        if (mMovement != null && !(mText instanceof Spannable))
1159            setText(mText);
1160
1161        fixFocusableAndClickableSettings();
1162
1163        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1164        prepareCursorControllers();
1165    }
1166
1167    private void fixFocusableAndClickableSettings() {
1168        if ((mMovement != null) || mInput != null) {
1169            setFocusable(true);
1170            setClickable(true);
1171            setLongClickable(true);
1172        } else {
1173            setFocusable(false);
1174            setClickable(false);
1175            setLongClickable(false);
1176        }
1177    }
1178
1179    /**
1180     * @return the current transformation method for this TextView.
1181     * This will frequently be null except for single-line and password
1182     * fields.
1183     */
1184    public final TransformationMethod getTransformationMethod() {
1185        return mTransformation;
1186    }
1187
1188    /**
1189     * Sets the transformation that is applied to the text that this
1190     * TextView is displaying.
1191     *
1192     * @attr ref android.R.styleable#TextView_password
1193     * @attr ref android.R.styleable#TextView_singleLine
1194     */
1195    public final void setTransformationMethod(TransformationMethod method) {
1196        if (method == mTransformation) {
1197            // Avoid the setText() below if the transformation is
1198            // the same.
1199            return;
1200        }
1201        if (mTransformation != null) {
1202            if (mText instanceof Spannable) {
1203                ((Spannable) mText).removeSpan(mTransformation);
1204            }
1205        }
1206
1207        mTransformation = method;
1208
1209        setText(mText);
1210    }
1211
1212    /**
1213     * Returns the top padding of the view, plus space for the top
1214     * Drawable if any.
1215     */
1216    public int getCompoundPaddingTop() {
1217        final Drawables dr = mDrawables;
1218        if (dr == null || dr.mDrawableTop == null) {
1219            return mPaddingTop;
1220        } else {
1221            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1222        }
1223    }
1224
1225    /**
1226     * Returns the bottom padding of the view, plus space for the bottom
1227     * Drawable if any.
1228     */
1229    public int getCompoundPaddingBottom() {
1230        final Drawables dr = mDrawables;
1231        if (dr == null || dr.mDrawableBottom == null) {
1232            return mPaddingBottom;
1233        } else {
1234            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1235        }
1236    }
1237
1238    /**
1239     * Returns the left padding of the view, plus space for the left
1240     * Drawable if any.
1241     */
1242    public int getCompoundPaddingLeft() {
1243        final Drawables dr = mDrawables;
1244        if (dr == null || dr.mDrawableLeft == null) {
1245            return mPaddingLeft;
1246        } else {
1247            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1248        }
1249    }
1250
1251    /**
1252     * Returns the right padding of the view, plus space for the right
1253     * Drawable if any.
1254     */
1255    public int getCompoundPaddingRight() {
1256        final Drawables dr = mDrawables;
1257        if (dr == null || dr.mDrawableRight == null) {
1258            return mPaddingRight;
1259        } else {
1260            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1261        }
1262    }
1263
1264    /**
1265     * Returns the extended top padding of the view, including both the
1266     * top Drawable if any and any extra space to keep more than maxLines
1267     * of text from showing.  It is only valid to call this after measuring.
1268     */
1269    public int getExtendedPaddingTop() {
1270        if (mMaxMode != LINES) {
1271            return getCompoundPaddingTop();
1272        }
1273
1274        if (mLayout.getLineCount() <= mMaximum) {
1275            return getCompoundPaddingTop();
1276        }
1277
1278        int top = getCompoundPaddingTop();
1279        int bottom = getCompoundPaddingBottom();
1280        int viewht = getHeight() - top - bottom;
1281        int layoutht = mLayout.getLineTop(mMaximum);
1282
1283        if (layoutht >= viewht) {
1284            return top;
1285        }
1286
1287        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1288        if (gravity == Gravity.TOP) {
1289            return top;
1290        } else if (gravity == Gravity.BOTTOM) {
1291            return top + viewht - layoutht;
1292        } else { // (gravity == Gravity.CENTER_VERTICAL)
1293            return top + (viewht - layoutht) / 2;
1294        }
1295    }
1296
1297    /**
1298     * Returns the extended bottom padding of the view, including both the
1299     * bottom Drawable if any and any extra space to keep more than maxLines
1300     * of text from showing.  It is only valid to call this after measuring.
1301     */
1302    public int getExtendedPaddingBottom() {
1303        if (mMaxMode != LINES) {
1304            return getCompoundPaddingBottom();
1305        }
1306
1307        if (mLayout.getLineCount() <= mMaximum) {
1308            return getCompoundPaddingBottom();
1309        }
1310
1311        int top = getCompoundPaddingTop();
1312        int bottom = getCompoundPaddingBottom();
1313        int viewht = getHeight() - top - bottom;
1314        int layoutht = mLayout.getLineTop(mMaximum);
1315
1316        if (layoutht >= viewht) {
1317            return bottom;
1318        }
1319
1320        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1321        if (gravity == Gravity.TOP) {
1322            return bottom + viewht - layoutht;
1323        } else if (gravity == Gravity.BOTTOM) {
1324            return bottom;
1325        } else { // (gravity == Gravity.CENTER_VERTICAL)
1326            return bottom + (viewht - layoutht) / 2;
1327        }
1328    }
1329
1330    /**
1331     * Returns the total left padding of the view, including the left
1332     * Drawable if any.
1333     */
1334    public int getTotalPaddingLeft() {
1335        return getCompoundPaddingLeft();
1336    }
1337
1338    /**
1339     * Returns the total right padding of the view, including the right
1340     * Drawable if any.
1341     */
1342    public int getTotalPaddingRight() {
1343        return getCompoundPaddingRight();
1344    }
1345
1346    /**
1347     * Returns the total top padding of the view, including the top
1348     * Drawable if any, the extra space to keep more than maxLines
1349     * from showing, and the vertical offset for gravity, if any.
1350     */
1351    public int getTotalPaddingTop() {
1352        return getExtendedPaddingTop() + getVerticalOffset(true);
1353    }
1354
1355    /**
1356     * Returns the total bottom padding of the view, including the bottom
1357     * Drawable if any, the extra space to keep more than maxLines
1358     * from showing, and the vertical offset for gravity, if any.
1359     */
1360    public int getTotalPaddingBottom() {
1361        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1362    }
1363
1364    /**
1365     * Sets the Drawables (if any) to appear to the left of, above,
1366     * to the right of, and below the text.  Use null if you do not
1367     * want a Drawable there.  The Drawables must already have had
1368     * {@link Drawable#setBounds} called.
1369     *
1370     * @attr ref android.R.styleable#TextView_drawableLeft
1371     * @attr ref android.R.styleable#TextView_drawableTop
1372     * @attr ref android.R.styleable#TextView_drawableRight
1373     * @attr ref android.R.styleable#TextView_drawableBottom
1374     */
1375    public void setCompoundDrawables(Drawable left, Drawable top,
1376                                     Drawable right, Drawable bottom) {
1377        Drawables dr = mDrawables;
1378
1379        final boolean drawables = left != null || top != null
1380                || right != null || bottom != null;
1381
1382        if (!drawables) {
1383            // Clearing drawables...  can we free the data structure?
1384            if (dr != null) {
1385                if (dr.mDrawablePadding == 0) {
1386                    mDrawables = null;
1387                } else {
1388                    // We need to retain the last set padding, so just clear
1389                    // out all of the fields in the existing structure.
1390                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1391                    dr.mDrawableLeft = null;
1392                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1393                    dr.mDrawableTop = null;
1394                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1395                    dr.mDrawableRight = null;
1396                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1397                    dr.mDrawableBottom = null;
1398                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1399                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1400                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1401                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1402                }
1403            }
1404        } else {
1405            if (dr == null) {
1406                mDrawables = dr = new Drawables();
1407            }
1408
1409            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1410                dr.mDrawableLeft.setCallback(null);
1411            }
1412            dr.mDrawableLeft = left;
1413
1414            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1415                dr.mDrawableTop.setCallback(null);
1416            }
1417            dr.mDrawableTop = top;
1418
1419            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1420                dr.mDrawableRight.setCallback(null);
1421            }
1422            dr.mDrawableRight = right;
1423
1424            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1425                dr.mDrawableBottom.setCallback(null);
1426            }
1427            dr.mDrawableBottom = bottom;
1428
1429            final Rect compoundRect = dr.mCompoundRect;
1430            int[] state;
1431
1432            state = getDrawableState();
1433
1434            if (left != null) {
1435                left.setState(state);
1436                left.copyBounds(compoundRect);
1437                left.setCallback(this);
1438                dr.mDrawableSizeLeft = compoundRect.width();
1439                dr.mDrawableHeightLeft = compoundRect.height();
1440            } else {
1441                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1442            }
1443
1444            if (right != null) {
1445                right.setState(state);
1446                right.copyBounds(compoundRect);
1447                right.setCallback(this);
1448                dr.mDrawableSizeRight = compoundRect.width();
1449                dr.mDrawableHeightRight = compoundRect.height();
1450            } else {
1451                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1452            }
1453
1454            if (top != null) {
1455                top.setState(state);
1456                top.copyBounds(compoundRect);
1457                top.setCallback(this);
1458                dr.mDrawableSizeTop = compoundRect.height();
1459                dr.mDrawableWidthTop = compoundRect.width();
1460            } else {
1461                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1462            }
1463
1464            if (bottom != null) {
1465                bottom.setState(state);
1466                bottom.copyBounds(compoundRect);
1467                bottom.setCallback(this);
1468                dr.mDrawableSizeBottom = compoundRect.height();
1469                dr.mDrawableWidthBottom = compoundRect.width();
1470            } else {
1471                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1472            }
1473        }
1474
1475        invalidate();
1476        requestLayout();
1477    }
1478
1479    /**
1480     * Sets the Drawables (if any) to appear to the left of, above,
1481     * to the right of, and below the text.  Use 0 if you do not
1482     * want a Drawable there. The Drawables' bounds will be set to
1483     * their intrinsic bounds.
1484     *
1485     * @param left Resource identifier of the left Drawable.
1486     * @param top Resource identifier of the top Drawable.
1487     * @param right Resource identifier of the right Drawable.
1488     * @param bottom Resource identifier of the bottom Drawable.
1489     *
1490     * @attr ref android.R.styleable#TextView_drawableLeft
1491     * @attr ref android.R.styleable#TextView_drawableTop
1492     * @attr ref android.R.styleable#TextView_drawableRight
1493     * @attr ref android.R.styleable#TextView_drawableBottom
1494     */
1495    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1496        final Resources resources = getContext().getResources();
1497        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1498                top != 0 ? resources.getDrawable(top) : null,
1499                right != 0 ? resources.getDrawable(right) : null,
1500                bottom != 0 ? resources.getDrawable(bottom) : null);
1501    }
1502
1503    /**
1504     * Sets the Drawables (if any) to appear to the left of, above,
1505     * to the right of, and below the text.  Use null if you do not
1506     * want a Drawable there. The Drawables' bounds will be set to
1507     * their intrinsic bounds.
1508     *
1509     * @attr ref android.R.styleable#TextView_drawableLeft
1510     * @attr ref android.R.styleable#TextView_drawableTop
1511     * @attr ref android.R.styleable#TextView_drawableRight
1512     * @attr ref android.R.styleable#TextView_drawableBottom
1513     */
1514    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1515            Drawable right, Drawable bottom) {
1516
1517        if (left != null) {
1518            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1519        }
1520        if (right != null) {
1521            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1522        }
1523        if (top != null) {
1524            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1525        }
1526        if (bottom != null) {
1527            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1528        }
1529        setCompoundDrawables(left, top, right, bottom);
1530    }
1531
1532    /**
1533     * Returns drawables for the left, top, right, and bottom borders.
1534     */
1535    public Drawable[] getCompoundDrawables() {
1536        final Drawables dr = mDrawables;
1537        if (dr != null) {
1538            return new Drawable[] {
1539                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1540            };
1541        } else {
1542            return new Drawable[] { null, null, null, null };
1543        }
1544    }
1545
1546    /**
1547     * Sets the size of the padding between the compound drawables and
1548     * the text.
1549     *
1550     * @attr ref android.R.styleable#TextView_drawablePadding
1551     */
1552    public void setCompoundDrawablePadding(int pad) {
1553        Drawables dr = mDrawables;
1554        if (pad == 0) {
1555            if (dr != null) {
1556                dr.mDrawablePadding = pad;
1557            }
1558        } else {
1559            if (dr == null) {
1560                mDrawables = dr = new Drawables();
1561            }
1562            dr.mDrawablePadding = pad;
1563        }
1564
1565        invalidate();
1566        requestLayout();
1567    }
1568
1569    /**
1570     * Returns the padding between the compound drawables and the text.
1571     */
1572    public int getCompoundDrawablePadding() {
1573        final Drawables dr = mDrawables;
1574        return dr != null ? dr.mDrawablePadding : 0;
1575    }
1576
1577    @Override
1578    public void setPadding(int left, int top, int right, int bottom) {
1579        if (left != mPaddingLeft ||
1580            right != mPaddingRight ||
1581            top != mPaddingTop ||
1582            bottom != mPaddingBottom) {
1583            nullLayouts();
1584        }
1585
1586        // the super call will requestLayout()
1587        super.setPadding(left, top, right, bottom);
1588        invalidate();
1589    }
1590
1591    /**
1592     * Gets the autolink mask of the text.  See {@link
1593     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1594     * possible values.
1595     *
1596     * @attr ref android.R.styleable#TextView_autoLink
1597     */
1598    public final int getAutoLinkMask() {
1599        return mAutoLinkMask;
1600    }
1601
1602    /**
1603     * Sets the text color, size, style, hint color, and highlight color
1604     * from the specified TextAppearance resource.
1605     */
1606    public void setTextAppearance(Context context, int resid) {
1607        TypedArray appearance =
1608            context.obtainStyledAttributes(resid,
1609                                           com.android.internal.R.styleable.TextAppearance);
1610
1611        int color;
1612        ColorStateList colors;
1613        int ts;
1614
1615        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1616        if (color != 0) {
1617            setHighlightColor(color);
1618        }
1619
1620        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1621                                              TextAppearance_textColor);
1622        if (colors != null) {
1623            setTextColor(colors);
1624        }
1625
1626        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1627                                              TextAppearance_textSize, 0);
1628        if (ts != 0) {
1629            setRawTextSize(ts);
1630        }
1631
1632        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1633                                              TextAppearance_textColorHint);
1634        if (colors != null) {
1635            setHintTextColor(colors);
1636        }
1637
1638        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1639                                              TextAppearance_textColorLink);
1640        if (colors != null) {
1641            setLinkTextColor(colors);
1642        }
1643
1644        int typefaceIndex, styleIndex;
1645
1646        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1647                                          TextAppearance_typeface, -1);
1648        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1649                                       TextAppearance_textStyle, -1);
1650
1651        setTypefaceByIndex(typefaceIndex, styleIndex);
1652        appearance.recycle();
1653    }
1654
1655    /**
1656     * @return the size (in pixels) of the default text size in this TextView.
1657     */
1658    public float getTextSize() {
1659        return mTextPaint.getTextSize();
1660    }
1661
1662    /**
1663     * Set the default text size to the given value, interpreted as "scaled
1664     * pixel" units.  This size is adjusted based on the current density and
1665     * user font size preference.
1666     *
1667     * @param size The scaled pixel size.
1668     *
1669     * @attr ref android.R.styleable#TextView_textSize
1670     */
1671    @android.view.RemotableViewMethod
1672    public void setTextSize(float size) {
1673        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1674    }
1675
1676    /**
1677     * Set the default text size to a given unit and value.  See {@link
1678     * TypedValue} for the possible dimension units.
1679     *
1680     * @param unit The desired dimension unit.
1681     * @param size The desired size in the given units.
1682     *
1683     * @attr ref android.R.styleable#TextView_textSize
1684     */
1685    public void setTextSize(int unit, float size) {
1686        Context c = getContext();
1687        Resources r;
1688
1689        if (c == null)
1690            r = Resources.getSystem();
1691        else
1692            r = c.getResources();
1693
1694        setRawTextSize(TypedValue.applyDimension(
1695            unit, size, r.getDisplayMetrics()));
1696    }
1697
1698    private void setRawTextSize(float size) {
1699        if (size != mTextPaint.getTextSize()) {
1700            mTextPaint.setTextSize(size);
1701
1702            if (mLayout != null) {
1703                nullLayouts();
1704                requestLayout();
1705                invalidate();
1706            }
1707        }
1708    }
1709
1710    /**
1711     * @return the extent by which text is currently being stretched
1712     * horizontally.  This will usually be 1.
1713     */
1714    public float getTextScaleX() {
1715        return mTextPaint.getTextScaleX();
1716    }
1717
1718    /**
1719     * Sets the extent by which text should be stretched horizontally.
1720     *
1721     * @attr ref android.R.styleable#TextView_textScaleX
1722     */
1723    @android.view.RemotableViewMethod
1724    public void setTextScaleX(float size) {
1725        if (size != mTextPaint.getTextScaleX()) {
1726            mUserSetTextScaleX = true;
1727            mTextPaint.setTextScaleX(size);
1728
1729            if (mLayout != null) {
1730                nullLayouts();
1731                requestLayout();
1732                invalidate();
1733            }
1734        }
1735    }
1736
1737    /**
1738     * Sets the typeface and style in which the text should be displayed.
1739     * Note that not all Typeface families actually have bold and italic
1740     * variants, so you may need to use
1741     * {@link #setTypeface(Typeface, int)} to get the appearance
1742     * that you actually want.
1743     *
1744     * @attr ref android.R.styleable#TextView_typeface
1745     * @attr ref android.R.styleable#TextView_textStyle
1746     */
1747    public void setTypeface(Typeface tf) {
1748        if (mTextPaint.getTypeface() != tf) {
1749            mTextPaint.setTypeface(tf);
1750
1751            if (mLayout != null) {
1752                nullLayouts();
1753                requestLayout();
1754                invalidate();
1755            }
1756        }
1757    }
1758
1759    /**
1760     * @return the current typeface and style in which the text is being
1761     * displayed.
1762     */
1763    public Typeface getTypeface() {
1764        return mTextPaint.getTypeface();
1765    }
1766
1767    /**
1768     * Sets the text color for all the states (normal, selected,
1769     * focused) to be this color.
1770     *
1771     * @attr ref android.R.styleable#TextView_textColor
1772     */
1773    @android.view.RemotableViewMethod
1774    public void setTextColor(int color) {
1775        mTextColor = ColorStateList.valueOf(color);
1776        updateTextColors();
1777    }
1778
1779    /**
1780     * Sets the text color.
1781     *
1782     * @attr ref android.R.styleable#TextView_textColor
1783     */
1784    public void setTextColor(ColorStateList colors) {
1785        if (colors == null) {
1786            throw new NullPointerException();
1787        }
1788
1789        mTextColor = colors;
1790        updateTextColors();
1791    }
1792
1793    /**
1794     * Return the set of text colors.
1795     *
1796     * @return Returns the set of text colors.
1797     */
1798    public final ColorStateList getTextColors() {
1799        return mTextColor;
1800    }
1801
1802    /**
1803     * <p>Return the current color selected for normal text.</p>
1804     *
1805     * @return Returns the current text color.
1806     */
1807    public final int getCurrentTextColor() {
1808        return mCurTextColor;
1809    }
1810
1811    /**
1812     * Sets the color used to display the selection highlight.
1813     *
1814     * @attr ref android.R.styleable#TextView_textColorHighlight
1815     */
1816    @android.view.RemotableViewMethod
1817    public void setHighlightColor(int color) {
1818        if (mHighlightColor != color) {
1819            mHighlightColor = color;
1820            invalidate();
1821        }
1822    }
1823
1824    /**
1825     * Gives the text a shadow of the specified radius and color, the specified
1826     * distance from its normal position.
1827     *
1828     * @attr ref android.R.styleable#TextView_shadowColor
1829     * @attr ref android.R.styleable#TextView_shadowDx
1830     * @attr ref android.R.styleable#TextView_shadowDy
1831     * @attr ref android.R.styleable#TextView_shadowRadius
1832     */
1833    public void setShadowLayer(float radius, float dx, float dy, int color) {
1834        mTextPaint.setShadowLayer(radius, dx, dy, color);
1835
1836        mShadowRadius = radius;
1837        mShadowDx = dx;
1838        mShadowDy = dy;
1839
1840        invalidate();
1841    }
1842
1843    /**
1844     * @return the base paint used for the text.  Please use this only to
1845     * consult the Paint's properties and not to change them.
1846     */
1847    public TextPaint getPaint() {
1848        return mTextPaint;
1849    }
1850
1851    /**
1852     * Sets the autolink mask of the text.  See {@link
1853     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1854     * possible values.
1855     *
1856     * @attr ref android.R.styleable#TextView_autoLink
1857     */
1858    @android.view.RemotableViewMethod
1859    public final void setAutoLinkMask(int mask) {
1860        mAutoLinkMask = mask;
1861    }
1862
1863    /**
1864     * Sets whether the movement method will automatically be set to
1865     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1866     * set to nonzero and links are detected in {@link #setText}.
1867     * The default is true.
1868     *
1869     * @attr ref android.R.styleable#TextView_linksClickable
1870     */
1871    @android.view.RemotableViewMethod
1872    public final void setLinksClickable(boolean whether) {
1873        mLinksClickable = whether;
1874    }
1875
1876    /**
1877     * Returns whether the movement method will automatically be set to
1878     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1879     * set to nonzero and links are detected in {@link #setText}.
1880     * The default is true.
1881     *
1882     * @attr ref android.R.styleable#TextView_linksClickable
1883     */
1884    public final boolean getLinksClickable() {
1885        return mLinksClickable;
1886    }
1887
1888    /**
1889     * Returns the list of URLSpans attached to the text
1890     * (by {@link Linkify} or otherwise) if any.  You can call
1891     * {@link URLSpan#getURL} on them to find where they link to
1892     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1893     * to find the region of the text they are attached to.
1894     */
1895    public URLSpan[] getUrls() {
1896        if (mText instanceof Spanned) {
1897            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1898        } else {
1899            return new URLSpan[0];
1900        }
1901    }
1902
1903    /**
1904     * Sets the color of the hint text.
1905     *
1906     * @attr ref android.R.styleable#TextView_textColorHint
1907     */
1908    @android.view.RemotableViewMethod
1909    public final void setHintTextColor(int color) {
1910        mHintTextColor = ColorStateList.valueOf(color);
1911        updateTextColors();
1912    }
1913
1914    /**
1915     * Sets the color of the hint text.
1916     *
1917     * @attr ref android.R.styleable#TextView_textColorHint
1918     */
1919    public final void setHintTextColor(ColorStateList colors) {
1920        mHintTextColor = colors;
1921        updateTextColors();
1922    }
1923
1924    /**
1925     * <p>Return the color used to paint the hint text.</p>
1926     *
1927     * @return Returns the list of hint text colors.
1928     */
1929    public final ColorStateList getHintTextColors() {
1930        return mHintTextColor;
1931    }
1932
1933    /**
1934     * <p>Return the current color selected to paint the hint text.</p>
1935     *
1936     * @return Returns the current hint text color.
1937     */
1938    public final int getCurrentHintTextColor() {
1939        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
1940    }
1941
1942    /**
1943     * Sets the color of links in the text.
1944     *
1945     * @attr ref android.R.styleable#TextView_textColorLink
1946     */
1947    @android.view.RemotableViewMethod
1948    public final void setLinkTextColor(int color) {
1949        mLinkTextColor = ColorStateList.valueOf(color);
1950        updateTextColors();
1951    }
1952
1953    /**
1954     * Sets the color of links in the text.
1955     *
1956     * @attr ref android.R.styleable#TextView_textColorLink
1957     */
1958    public final void setLinkTextColor(ColorStateList colors) {
1959        mLinkTextColor = colors;
1960        updateTextColors();
1961    }
1962
1963    /**
1964     * <p>Returns the color used to paint links in the text.</p>
1965     *
1966     * @return Returns the list of link text colors.
1967     */
1968    public final ColorStateList getLinkTextColors() {
1969        return mLinkTextColor;
1970    }
1971
1972    /**
1973     * Sets the horizontal alignment of the text and the
1974     * vertical gravity that will be used when there is extra space
1975     * in the TextView beyond what is required for the text itself.
1976     *
1977     * @see android.view.Gravity
1978     * @attr ref android.R.styleable#TextView_gravity
1979     */
1980    public void setGravity(int gravity) {
1981        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
1982            gravity |= Gravity.LEFT;
1983        }
1984        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
1985            gravity |= Gravity.TOP;
1986        }
1987
1988        boolean newLayout = false;
1989
1990        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
1991            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
1992            newLayout = true;
1993        }
1994
1995        if (gravity != mGravity) {
1996            invalidate();
1997        }
1998
1999        mGravity = gravity;
2000
2001        if (mLayout != null && newLayout) {
2002            // XXX this is heavy-handed because no actual content changes.
2003            int want = mLayout.getWidth();
2004            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2005
2006            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2007                          mRight - mLeft - getCompoundPaddingLeft() -
2008                          getCompoundPaddingRight(), true);
2009        }
2010    }
2011
2012    /**
2013     * Returns the horizontal and vertical alignment of this TextView.
2014     *
2015     * @see android.view.Gravity
2016     * @attr ref android.R.styleable#TextView_gravity
2017     */
2018    public int getGravity() {
2019        return mGravity;
2020    }
2021
2022    /**
2023     * @return the flags on the Paint being used to display the text.
2024     * @see Paint#getFlags
2025     */
2026    public int getPaintFlags() {
2027        return mTextPaint.getFlags();
2028    }
2029
2030    /**
2031     * Sets flags on the Paint being used to display the text and
2032     * reflows the text if they are different from the old flags.
2033     * @see Paint#setFlags
2034     */
2035    @android.view.RemotableViewMethod
2036    public void setPaintFlags(int flags) {
2037        if (mTextPaint.getFlags() != flags) {
2038            mTextPaint.setFlags(flags);
2039
2040            if (mLayout != null) {
2041                nullLayouts();
2042                requestLayout();
2043                invalidate();
2044            }
2045        }
2046    }
2047
2048    /**
2049     * Sets whether the text should be allowed to be wider than the
2050     * View is.  If false, it will be wrapped to the width of the View.
2051     *
2052     * @attr ref android.R.styleable#TextView_scrollHorizontally
2053     */
2054    public void setHorizontallyScrolling(boolean whether) {
2055        mHorizontallyScrolling = whether;
2056
2057        if (mLayout != null) {
2058            nullLayouts();
2059            requestLayout();
2060            invalidate();
2061        }
2062    }
2063
2064    /**
2065     * Makes the TextView at least this many lines tall
2066     *
2067     * @attr ref android.R.styleable#TextView_minLines
2068     */
2069    @android.view.RemotableViewMethod
2070    public void setMinLines(int minlines) {
2071        mMinimum = minlines;
2072        mMinMode = LINES;
2073
2074        requestLayout();
2075        invalidate();
2076    }
2077
2078    /**
2079     * Makes the TextView at least this many pixels tall
2080     *
2081     * @attr ref android.R.styleable#TextView_minHeight
2082     */
2083    @android.view.RemotableViewMethod
2084    public void setMinHeight(int minHeight) {
2085        mMinimum = minHeight;
2086        mMinMode = PIXELS;
2087
2088        requestLayout();
2089        invalidate();
2090    }
2091
2092    /**
2093     * Makes the TextView at most this many lines tall
2094     *
2095     * @attr ref android.R.styleable#TextView_maxLines
2096     */
2097    @android.view.RemotableViewMethod
2098    public void setMaxLines(int maxlines) {
2099        mMaximum = maxlines;
2100        mMaxMode = LINES;
2101
2102        requestLayout();
2103        invalidate();
2104    }
2105
2106    /**
2107     * Makes the TextView at most this many pixels tall
2108     *
2109     * @attr ref android.R.styleable#TextView_maxHeight
2110     */
2111    @android.view.RemotableViewMethod
2112    public void setMaxHeight(int maxHeight) {
2113        mMaximum = maxHeight;
2114        mMaxMode = PIXELS;
2115
2116        requestLayout();
2117        invalidate();
2118    }
2119
2120    /**
2121     * Makes the TextView exactly this many lines tall
2122     *
2123     * @attr ref android.R.styleable#TextView_lines
2124     */
2125    @android.view.RemotableViewMethod
2126    public void setLines(int lines) {
2127        mMaximum = mMinimum = lines;
2128        mMaxMode = mMinMode = LINES;
2129
2130        requestLayout();
2131        invalidate();
2132    }
2133
2134    /**
2135     * Makes the TextView exactly this many pixels tall.
2136     * You could do the same thing by specifying this number in the
2137     * LayoutParams.
2138     *
2139     * @attr ref android.R.styleable#TextView_height
2140     */
2141    @android.view.RemotableViewMethod
2142    public void setHeight(int pixels) {
2143        mMaximum = mMinimum = pixels;
2144        mMaxMode = mMinMode = PIXELS;
2145
2146        requestLayout();
2147        invalidate();
2148    }
2149
2150    /**
2151     * Makes the TextView at least this many ems wide
2152     *
2153     * @attr ref android.R.styleable#TextView_minEms
2154     */
2155    @android.view.RemotableViewMethod
2156    public void setMinEms(int minems) {
2157        mMinWidth = minems;
2158        mMinWidthMode = EMS;
2159
2160        requestLayout();
2161        invalidate();
2162    }
2163
2164    /**
2165     * Makes the TextView at least this many pixels wide
2166     *
2167     * @attr ref android.R.styleable#TextView_minWidth
2168     */
2169    @android.view.RemotableViewMethod
2170    public void setMinWidth(int minpixels) {
2171        mMinWidth = minpixels;
2172        mMinWidthMode = PIXELS;
2173
2174        requestLayout();
2175        invalidate();
2176    }
2177
2178    /**
2179     * Makes the TextView at most this many ems wide
2180     *
2181     * @attr ref android.R.styleable#TextView_maxEms
2182     */
2183    @android.view.RemotableViewMethod
2184    public void setMaxEms(int maxems) {
2185        mMaxWidth = maxems;
2186        mMaxWidthMode = EMS;
2187
2188        requestLayout();
2189        invalidate();
2190    }
2191
2192    /**
2193     * Makes the TextView at most this many pixels wide
2194     *
2195     * @attr ref android.R.styleable#TextView_maxWidth
2196     */
2197    @android.view.RemotableViewMethod
2198    public void setMaxWidth(int maxpixels) {
2199        mMaxWidth = maxpixels;
2200        mMaxWidthMode = PIXELS;
2201
2202        requestLayout();
2203        invalidate();
2204    }
2205
2206    /**
2207     * Makes the TextView exactly this many ems wide
2208     *
2209     * @attr ref android.R.styleable#TextView_ems
2210     */
2211    @android.view.RemotableViewMethod
2212    public void setEms(int ems) {
2213        mMaxWidth = mMinWidth = ems;
2214        mMaxWidthMode = mMinWidthMode = EMS;
2215
2216        requestLayout();
2217        invalidate();
2218    }
2219
2220    /**
2221     * Makes the TextView exactly this many pixels wide.
2222     * You could do the same thing by specifying this number in the
2223     * LayoutParams.
2224     *
2225     * @attr ref android.R.styleable#TextView_width
2226     */
2227    @android.view.RemotableViewMethod
2228    public void setWidth(int pixels) {
2229        mMaxWidth = mMinWidth = pixels;
2230        mMaxWidthMode = mMinWidthMode = PIXELS;
2231
2232        requestLayout();
2233        invalidate();
2234    }
2235
2236
2237    /**
2238     * Sets line spacing for this TextView.  Each line will have its height
2239     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2240     *
2241     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2242     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2243     */
2244    public void setLineSpacing(float add, float mult) {
2245        mSpacingMult = mult;
2246        mSpacingAdd = add;
2247
2248        if (mLayout != null) {
2249            nullLayouts();
2250            requestLayout();
2251            invalidate();
2252        }
2253    }
2254
2255    /**
2256     * Convenience method: Append the specified text to the TextView's
2257     * display buffer, upgrading it to BufferType.EDITABLE if it was
2258     * not already editable.
2259     */
2260    public final void append(CharSequence text) {
2261        append(text, 0, text.length());
2262    }
2263
2264    /**
2265     * Convenience method: Append the specified text slice to the TextView's
2266     * display buffer, upgrading it to BufferType.EDITABLE if it was
2267     * not already editable.
2268     */
2269    public void append(CharSequence text, int start, int end) {
2270        if (!(mText instanceof Editable)) {
2271            setText(mText, BufferType.EDITABLE);
2272        }
2273
2274        ((Editable) mText).append(text, start, end);
2275    }
2276
2277    private void updateTextColors() {
2278        boolean inval = false;
2279        int color = mTextColor.getColorForState(getDrawableState(), 0);
2280        if (color != mCurTextColor) {
2281            mCurTextColor = color;
2282            inval = true;
2283        }
2284        if (mLinkTextColor != null) {
2285            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2286            if (color != mTextPaint.linkColor) {
2287                mTextPaint.linkColor = color;
2288                inval = true;
2289            }
2290        }
2291        if (mHintTextColor != null) {
2292            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2293            if (color != mCurHintTextColor && mText.length() == 0) {
2294                mCurHintTextColor = color;
2295                inval = true;
2296            }
2297        }
2298        if (inval) {
2299            invalidate();
2300        }
2301    }
2302
2303    @Override
2304    protected void drawableStateChanged() {
2305        super.drawableStateChanged();
2306        if (mTextColor != null && mTextColor.isStateful()
2307                || (mHintTextColor != null && mHintTextColor.isStateful())
2308                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2309            updateTextColors();
2310        }
2311
2312        final Drawables dr = mDrawables;
2313        if (dr != null) {
2314            int[] state = getDrawableState();
2315            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2316                dr.mDrawableTop.setState(state);
2317            }
2318            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2319                dr.mDrawableBottom.setState(state);
2320            }
2321            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2322                dr.mDrawableLeft.setState(state);
2323            }
2324            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2325                dr.mDrawableRight.setState(state);
2326            }
2327        }
2328    }
2329
2330    /**
2331     * User interface state that is stored by TextView for implementing
2332     * {@link View#onSaveInstanceState}.
2333     */
2334    public static class SavedState extends BaseSavedState {
2335        int selStart;
2336        int selEnd;
2337        CharSequence text;
2338        boolean frozenWithFocus;
2339        CharSequence error;
2340
2341        SavedState(Parcelable superState) {
2342            super(superState);
2343        }
2344
2345        @Override
2346        public void writeToParcel(Parcel out, int flags) {
2347            super.writeToParcel(out, flags);
2348            out.writeInt(selStart);
2349            out.writeInt(selEnd);
2350            out.writeInt(frozenWithFocus ? 1 : 0);
2351            TextUtils.writeToParcel(text, out, flags);
2352
2353            if (error == null) {
2354                out.writeInt(0);
2355            } else {
2356                out.writeInt(1);
2357                TextUtils.writeToParcel(error, out, flags);
2358            }
2359        }
2360
2361        @Override
2362        public String toString() {
2363            String str = "TextView.SavedState{"
2364                    + Integer.toHexString(System.identityHashCode(this))
2365                    + " start=" + selStart + " end=" + selEnd;
2366            if (text != null) {
2367                str += " text=" + text;
2368            }
2369            return str + "}";
2370        }
2371
2372        @SuppressWarnings("hiding")
2373        public static final Parcelable.Creator<SavedState> CREATOR
2374                = new Parcelable.Creator<SavedState>() {
2375            public SavedState createFromParcel(Parcel in) {
2376                return new SavedState(in);
2377            }
2378
2379            public SavedState[] newArray(int size) {
2380                return new SavedState[size];
2381            }
2382        };
2383
2384        private SavedState(Parcel in) {
2385            super(in);
2386            selStart = in.readInt();
2387            selEnd = in.readInt();
2388            frozenWithFocus = (in.readInt() != 0);
2389            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2390
2391            if (in.readInt() != 0) {
2392                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2393            }
2394        }
2395    }
2396
2397    @Override
2398    public Parcelable onSaveInstanceState() {
2399        Parcelable superState = super.onSaveInstanceState();
2400
2401        // Save state if we are forced to
2402        boolean save = mFreezesText;
2403        int start = 0;
2404        int end = 0;
2405
2406        if (mText != null) {
2407            start = getSelectionStart();
2408            end = getSelectionEnd();
2409            if (start >= 0 || end >= 0) {
2410                // Or save state if there is a selection
2411                save = true;
2412            }
2413        }
2414
2415        if (save) {
2416            SavedState ss = new SavedState(superState);
2417            // XXX Should also save the current scroll position!
2418            ss.selStart = start;
2419            ss.selEnd = end;
2420
2421            if (mText instanceof Spanned) {
2422                /*
2423                 * Calling setText() strips off any ChangeWatchers;
2424                 * strip them now to avoid leaking references.
2425                 * But do it to a copy so that if there are any
2426                 * further changes to the text of this view, it
2427                 * won't get into an inconsistent state.
2428                 */
2429
2430                Spannable sp = new SpannableString(mText);
2431
2432                for (ChangeWatcher cw :
2433                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2434                    sp.removeSpan(cw);
2435                }
2436
2437                ss.text = sp;
2438            } else {
2439                ss.text = mText.toString();
2440            }
2441
2442            if (isFocused() && start >= 0 && end >= 0) {
2443                ss.frozenWithFocus = true;
2444            }
2445
2446            ss.error = mError;
2447
2448            return ss;
2449        }
2450
2451        return superState;
2452    }
2453
2454    @Override
2455    public void onRestoreInstanceState(Parcelable state) {
2456        if (!(state instanceof SavedState)) {
2457            super.onRestoreInstanceState(state);
2458            return;
2459        }
2460
2461        SavedState ss = (SavedState)state;
2462        super.onRestoreInstanceState(ss.getSuperState());
2463
2464        // XXX restore buffer type too, as well as lots of other stuff
2465        if (ss.text != null) {
2466            setText(ss.text);
2467        }
2468
2469        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2470            if (mText instanceof Spannable) {
2471                int len = mText.length();
2472
2473                if (ss.selStart > len || ss.selEnd > len) {
2474                    String restored = "";
2475
2476                    if (ss.text != null) {
2477                        restored = "(restored) ";
2478                    }
2479
2480                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2481                          "/" + ss.selEnd + " out of range for " + restored +
2482                          "text " + mText);
2483                } else {
2484                    Selection.setSelection((Spannable) mText, ss.selStart,
2485                                           ss.selEnd);
2486
2487                    if (ss.frozenWithFocus) {
2488                        mFrozenWithFocus = true;
2489                    }
2490                }
2491            }
2492        }
2493
2494        if (ss.error != null) {
2495            final CharSequence error = ss.error;
2496            // Display the error later, after the first layout pass
2497            post(new Runnable() {
2498                public void run() {
2499                    setError(error);
2500                }
2501            });
2502        }
2503    }
2504
2505    /**
2506     * Control whether this text view saves its entire text contents when
2507     * freezing to an icicle, in addition to dynamic state such as cursor
2508     * position.  By default this is false, not saving the text.  Set to true
2509     * if the text in the text view is not being saved somewhere else in
2510     * persistent storage (such as in a content provider) so that if the
2511     * view is later thawed the user will not lose their data.
2512     *
2513     * @param freezesText Controls whether a frozen icicle should include the
2514     * entire text data: true to include it, false to not.
2515     *
2516     * @attr ref android.R.styleable#TextView_freezesText
2517     */
2518    @android.view.RemotableViewMethod
2519    public void setFreezesText(boolean freezesText) {
2520        mFreezesText = freezesText;
2521    }
2522
2523    /**
2524     * Return whether this text view is including its entire text contents
2525     * in frozen icicles.
2526     *
2527     * @return Returns true if text is included, false if it isn't.
2528     *
2529     * @see #setFreezesText
2530     */
2531    public boolean getFreezesText() {
2532        return mFreezesText;
2533    }
2534
2535    ///////////////////////////////////////////////////////////////////////////
2536
2537    /**
2538     * Sets the Factory used to create new Editables.
2539     */
2540    public final void setEditableFactory(Editable.Factory factory) {
2541        mEditableFactory = factory;
2542        setText(mText);
2543    }
2544
2545    /**
2546     * Sets the Factory used to create new Spannables.
2547     */
2548    public final void setSpannableFactory(Spannable.Factory factory) {
2549        mSpannableFactory = factory;
2550        setText(mText);
2551    }
2552
2553    /**
2554     * Sets the string value of the TextView. TextView <em>does not</em> accept
2555     * HTML-like formatting, which you can do with text strings in XML resource files.
2556     * To style your strings, attach android.text.style.* objects to a
2557     * {@link android.text.SpannableString SpannableString}, or see the
2558     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2559     * Available Resource Types</a> documentation for an example of setting
2560     * formatted text in the XML resource file.
2561     *
2562     * @attr ref android.R.styleable#TextView_text
2563     */
2564    @android.view.RemotableViewMethod
2565    public final void setText(CharSequence text) {
2566        setText(text, mBufferType);
2567    }
2568
2569    /**
2570     * Like {@link #setText(CharSequence)},
2571     * except that the cursor position (if any) is retained in the new text.
2572     *
2573     * @param text The new text to place in the text view.
2574     *
2575     * @see #setText(CharSequence)
2576     */
2577    @android.view.RemotableViewMethod
2578    public final void setTextKeepState(CharSequence text) {
2579        setTextKeepState(text, mBufferType);
2580    }
2581
2582    /**
2583     * Sets the text that this TextView is to display (see
2584     * {@link #setText(CharSequence)}) and also sets whether it is stored
2585     * in a styleable/spannable buffer and whether it is editable.
2586     *
2587     * @attr ref android.R.styleable#TextView_text
2588     * @attr ref android.R.styleable#TextView_bufferType
2589     */
2590    public void setText(CharSequence text, BufferType type) {
2591        setText(text, type, true, 0);
2592
2593        if (mCharWrapper != null) {
2594            mCharWrapper.mChars = null;
2595        }
2596    }
2597
2598    private void setText(CharSequence text, BufferType type,
2599                         boolean notifyBefore, int oldlen) {
2600        if (text == null) {
2601            text = "";
2602        }
2603
2604        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2605
2606        if (text instanceof Spanned &&
2607            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2608            setHorizontalFadingEdgeEnabled(true);
2609            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2610        }
2611
2612        int n = mFilters.length;
2613        for (int i = 0; i < n; i++) {
2614            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2615                                                  EMPTY_SPANNED, 0, 0);
2616            if (out != null) {
2617                text = out;
2618            }
2619        }
2620
2621        if (notifyBefore) {
2622            if (mText != null) {
2623                oldlen = mText.length();
2624                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2625            } else {
2626                sendBeforeTextChanged("", 0, 0, text.length());
2627            }
2628        }
2629
2630        boolean needEditableForNotification = false;
2631
2632        if (mListeners != null && mListeners.size() != 0) {
2633            needEditableForNotification = true;
2634        }
2635
2636        if (type == BufferType.EDITABLE || mInput != null ||
2637            needEditableForNotification) {
2638            Editable t = mEditableFactory.newEditable(text);
2639            text = t;
2640            setFilters(t, mFilters);
2641            InputMethodManager imm = InputMethodManager.peekInstance();
2642            if (imm != null) imm.restartInput(this);
2643        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2644            text = mSpannableFactory.newSpannable(text);
2645        } else if (!(text instanceof CharWrapper)) {
2646            text = TextUtils.stringOrSpannedString(text);
2647        }
2648
2649        if (mAutoLinkMask != 0) {
2650            Spannable s2;
2651
2652            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2653                s2 = (Spannable) text;
2654            } else {
2655                s2 = mSpannableFactory.newSpannable(text);
2656            }
2657
2658            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2659                text = s2;
2660                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2661
2662                /*
2663                 * We must go ahead and set the text before changing the
2664                 * movement method, because setMovementMethod() may call
2665                 * setText() again to try to upgrade the buffer type.
2666                 */
2667                mText = text;
2668
2669                if (mLinksClickable) {
2670                    setMovementMethod(LinkMovementMethod.getInstance());
2671                }
2672            }
2673        }
2674
2675        mBufferType = type;
2676        mText = text;
2677
2678        if (mTransformation == null)
2679            mTransformed = text;
2680        else
2681            mTransformed = mTransformation.getTransformation(text, this);
2682
2683        final int textLength = text.length();
2684
2685        if (text instanceof Spannable) {
2686            Spannable sp = (Spannable) text;
2687
2688            // Remove any ChangeWatchers that might have come
2689            // from other TextViews.
2690            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2691            final int count = watchers.length;
2692            for (int i = 0; i < count; i++)
2693                sp.removeSpan(watchers[i]);
2694
2695            if (mChangeWatcher == null)
2696                mChangeWatcher = new ChangeWatcher();
2697
2698            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2699                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2700
2701            if (mInput != null) {
2702                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2703            }
2704
2705            if (mTransformation != null) {
2706                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2707
2708            }
2709
2710            if (mMovement != null) {
2711                mMovement.initialize(this, (Spannable) text);
2712
2713                /*
2714                 * Initializing the movement method will have set the
2715                 * selection, so reset mSelectionMoved to keep that from
2716                 * interfering with the normal on-focus selection-setting.
2717                 */
2718                mSelectionMoved = false;
2719            }
2720        }
2721
2722        if (mLayout != null) {
2723            checkForRelayout();
2724        }
2725
2726        sendOnTextChanged(text, 0, oldlen, textLength);
2727        onTextChanged(text, 0, oldlen, textLength);
2728
2729        if (needEditableForNotification) {
2730            sendAfterTextChanged((Editable) text);
2731        }
2732
2733        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
2734        prepareCursorControllers();
2735    }
2736
2737    /**
2738     * Sets the TextView to display the specified slice of the specified
2739     * char array.  You must promise that you will not change the contents
2740     * of the array except for right before another call to setText(),
2741     * since the TextView has no way to know that the text
2742     * has changed and that it needs to invalidate and re-layout.
2743     */
2744    public final void setText(char[] text, int start, int len) {
2745        int oldlen = 0;
2746
2747        if (start < 0 || len < 0 || start + len > text.length) {
2748            throw new IndexOutOfBoundsException(start + ", " + len);
2749        }
2750
2751        /*
2752         * We must do the before-notification here ourselves because if
2753         * the old text is a CharWrapper we destroy it before calling
2754         * into the normal path.
2755         */
2756        if (mText != null) {
2757            oldlen = mText.length();
2758            sendBeforeTextChanged(mText, 0, oldlen, len);
2759        } else {
2760            sendBeforeTextChanged("", 0, 0, len);
2761        }
2762
2763        if (mCharWrapper == null) {
2764            mCharWrapper = new CharWrapper(text, start, len);
2765        } else {
2766            mCharWrapper.set(text, start, len);
2767        }
2768
2769        setText(mCharWrapper, mBufferType, false, oldlen);
2770    }
2771
2772    private static class CharWrapper
2773            implements CharSequence, GetChars, GraphicsOperations {
2774        private char[] mChars;
2775        private int mStart, mLength;
2776
2777        public CharWrapper(char[] chars, int start, int len) {
2778            mChars = chars;
2779            mStart = start;
2780            mLength = len;
2781        }
2782
2783        /* package */ void set(char[] chars, int start, int len) {
2784            mChars = chars;
2785            mStart = start;
2786            mLength = len;
2787        }
2788
2789        public int length() {
2790            return mLength;
2791        }
2792
2793        public char charAt(int off) {
2794            return mChars[off + mStart];
2795        }
2796
2797        @Override
2798        public String toString() {
2799            return new String(mChars, mStart, mLength);
2800        }
2801
2802        public CharSequence subSequence(int start, int end) {
2803            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2804                throw new IndexOutOfBoundsException(start + ", " + end);
2805            }
2806
2807            return new String(mChars, start + mStart, end - start);
2808        }
2809
2810        public void getChars(int start, int end, char[] buf, int off) {
2811            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2812                throw new IndexOutOfBoundsException(start + ", " + end);
2813            }
2814
2815            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2816        }
2817
2818        public void drawText(Canvas c, int start, int end,
2819                             float x, float y, Paint p) {
2820            c.drawText(mChars, start + mStart, end - start, x, y, p);
2821        }
2822
2823        public float measureText(int start, int end, Paint p) {
2824            return p.measureText(mChars, start + mStart, end - start);
2825        }
2826
2827        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2828            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2829        }
2830    }
2831
2832    /**
2833     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2834     * except that the cursor position (if any) is retained in the new text.
2835     *
2836     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2837     */
2838    public final void setTextKeepState(CharSequence text, BufferType type) {
2839        int start = getSelectionStart();
2840        int end = getSelectionEnd();
2841        int len = text.length();
2842
2843        setText(text, type);
2844
2845        if (start >= 0 || end >= 0) {
2846            if (mText instanceof Spannable) {
2847                Selection.setSelection((Spannable) mText,
2848                                       Math.max(0, Math.min(start, len)),
2849                                       Math.max(0, Math.min(end, len)));
2850            }
2851        }
2852    }
2853
2854    @android.view.RemotableViewMethod
2855    public final void setText(int resid) {
2856        setText(getContext().getResources().getText(resid));
2857    }
2858
2859    public final void setText(int resid, BufferType type) {
2860        setText(getContext().getResources().getText(resid), type);
2861    }
2862
2863    /**
2864     * Sets the text to be displayed when the text of the TextView is empty.
2865     * Null means to use the normal empty text. The hint does not currently
2866     * participate in determining the size of the view.
2867     *
2868     * @attr ref android.R.styleable#TextView_hint
2869     */
2870    @android.view.RemotableViewMethod
2871    public final void setHint(CharSequence hint) {
2872        mHint = TextUtils.stringOrSpannedString(hint);
2873
2874        if (mLayout != null) {
2875            checkForRelayout();
2876        }
2877
2878        if (mText.length() == 0) {
2879            invalidate();
2880        }
2881    }
2882
2883    /**
2884     * Sets the text to be displayed when the text of the TextView is empty,
2885     * from a resource.
2886     *
2887     * @attr ref android.R.styleable#TextView_hint
2888     */
2889    @android.view.RemotableViewMethod
2890    public final void setHint(int resid) {
2891        setHint(getContext().getResources().getText(resid));
2892    }
2893
2894    /**
2895     * Returns the hint that is displayed when the text of the TextView
2896     * is empty.
2897     *
2898     * @attr ref android.R.styleable#TextView_hint
2899     */
2900    @ViewDebug.CapturedViewProperty
2901    public CharSequence getHint() {
2902        return mHint;
2903    }
2904
2905    /**
2906     * Set the type of the content with a constant as defined for
2907     * {@link EditorInfo#inputType}.  This will take care of changing
2908     * the key listener, by calling {@link #setKeyListener(KeyListener)}, to
2909     * match the given content type.  If the given content type is
2910     * {@link EditorInfo#TYPE_NULL} then a soft keyboard will
2911     * not be displayed for this text view.
2912     *
2913     * @see #getInputType()
2914     * @see #setRawInputType(int)
2915     * @see android.text.InputType
2916     * @attr ref android.R.styleable#TextView_inputType
2917     */
2918    public void setInputType(int type) {
2919        final boolean wasPassword = isPasswordInputType(mInputType);
2920        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
2921        setInputType(type, false);
2922        final boolean isPassword = isPasswordInputType(type);
2923        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
2924        boolean forceUpdate = false;
2925        if (isPassword) {
2926            setTransformationMethod(PasswordTransformationMethod.getInstance());
2927            setTypefaceByIndex(MONOSPACE, 0);
2928        } else if (isVisiblePassword) {
2929            if (mTransformation == PasswordTransformationMethod.getInstance()) {
2930                forceUpdate = true;
2931            }
2932            setTypefaceByIndex(MONOSPACE, 0);
2933        } else if (wasPassword || wasVisiblePassword) {
2934            // not in password mode, clean up typeface and transformation
2935            setTypefaceByIndex(-1, -1);
2936            if (mTransformation == PasswordTransformationMethod.getInstance()) {
2937                forceUpdate = true;
2938            }
2939        }
2940
2941        boolean multiLine = (type&(EditorInfo.TYPE_MASK_CLASS
2942                        | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
2943                (EditorInfo.TYPE_CLASS_TEXT
2944                        | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
2945
2946        // We need to update the single line mode if it has changed or we
2947        // were previously in password mode.
2948        if (mSingleLine == multiLine || forceUpdate) {
2949            // Change single line mode, but only change the transformation if
2950            // we are not in password mode.
2951            applySingleLine(!multiLine, !isPassword);
2952        }
2953
2954        InputMethodManager imm = InputMethodManager.peekInstance();
2955        if (imm != null) imm.restartInput(this);
2956    }
2957
2958    private boolean isPasswordInputType(int inputType) {
2959        final int variation = inputType & (EditorInfo.TYPE_MASK_CLASS
2960                | EditorInfo.TYPE_MASK_VARIATION);
2961        return variation
2962                == (EditorInfo.TYPE_CLASS_TEXT
2963                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
2964    }
2965
2966    private boolean isVisiblePasswordInputType(int inputType) {
2967        final int variation = inputType & (EditorInfo.TYPE_MASK_CLASS
2968                | EditorInfo.TYPE_MASK_VARIATION);
2969        return variation
2970                == (EditorInfo.TYPE_CLASS_TEXT
2971                        | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
2972    }
2973
2974    /**
2975     * Directly change the content type integer of the text view, without
2976     * modifying any other state.
2977     * @see #setInputType(int)
2978     * @see android.text.InputType
2979     * @attr ref android.R.styleable#TextView_inputType
2980     */
2981    public void setRawInputType(int type) {
2982        mInputType = type;
2983    }
2984
2985    private void setInputType(int type, boolean direct) {
2986        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
2987        KeyListener input;
2988        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
2989            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
2990            TextKeyListener.Capitalize cap;
2991            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
2992                cap = TextKeyListener.Capitalize.CHARACTERS;
2993            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
2994                cap = TextKeyListener.Capitalize.WORDS;
2995            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
2996                cap = TextKeyListener.Capitalize.SENTENCES;
2997            } else {
2998                cap = TextKeyListener.Capitalize.NONE;
2999            }
3000            input = TextKeyListener.getInstance(autotext, cap);
3001        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3002            input = DigitsKeyListener.getInstance(
3003                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3004                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3005        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3006            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3007                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3008                    input = DateKeyListener.getInstance();
3009                    break;
3010                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3011                    input = TimeKeyListener.getInstance();
3012                    break;
3013                default:
3014                    input = DateTimeKeyListener.getInstance();
3015                    break;
3016            }
3017        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3018            input = DialerKeyListener.getInstance();
3019        } else {
3020            input = TextKeyListener.getInstance();
3021        }
3022        setRawInputType(type);
3023        if (direct) mInput = input;
3024        else {
3025            setKeyListenerOnly(input);
3026        }
3027    }
3028
3029    /**
3030     * Get the type of the content.
3031     *
3032     * @see #setInputType(int)
3033     * @see android.text.InputType
3034     */
3035    public int getInputType() {
3036        return mInputType;
3037    }
3038
3039    /**
3040     * Change the editor type integer associated with the text view, which
3041     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3042     * has focus.
3043     * @see #getImeOptions
3044     * @see android.view.inputmethod.EditorInfo
3045     * @attr ref android.R.styleable#TextView_imeOptions
3046     */
3047    public void setImeOptions(int imeOptions) {
3048        if (mInputContentType == null) {
3049            mInputContentType = new InputContentType();
3050        }
3051        mInputContentType.imeOptions = imeOptions;
3052    }
3053
3054    /**
3055     * Get the type of the IME editor.
3056     *
3057     * @see #setImeOptions(int)
3058     * @see android.view.inputmethod.EditorInfo
3059     */
3060    public int getImeOptions() {
3061        return mInputContentType != null
3062                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3063    }
3064
3065    /**
3066     * Change the custom IME action associated with the text view, which
3067     * will be reported to an IME with {@link EditorInfo#actionLabel}
3068     * and {@link EditorInfo#actionId} when it has focus.
3069     * @see #getImeActionLabel
3070     * @see #getImeActionId
3071     * @see android.view.inputmethod.EditorInfo
3072     * @attr ref android.R.styleable#TextView_imeActionLabel
3073     * @attr ref android.R.styleable#TextView_imeActionId
3074     */
3075    public void setImeActionLabel(CharSequence label, int actionId) {
3076        if (mInputContentType == null) {
3077            mInputContentType = new InputContentType();
3078        }
3079        mInputContentType.imeActionLabel = label;
3080        mInputContentType.imeActionId = actionId;
3081    }
3082
3083    /**
3084     * Get the IME action label previous set with {@link #setImeActionLabel}.
3085     *
3086     * @see #setImeActionLabel
3087     * @see android.view.inputmethod.EditorInfo
3088     */
3089    public CharSequence getImeActionLabel() {
3090        return mInputContentType != null
3091                ? mInputContentType.imeActionLabel : null;
3092    }
3093
3094    /**
3095     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3096     *
3097     * @see #setImeActionLabel
3098     * @see android.view.inputmethod.EditorInfo
3099     */
3100    public int getImeActionId() {
3101        return mInputContentType != null
3102                ? mInputContentType.imeActionId : 0;
3103    }
3104
3105    /**
3106     * Set a special listener to be called when an action is performed
3107     * on the text view.  This will be called when the enter key is pressed,
3108     * or when an action supplied to the IME is selected by the user.  Setting
3109     * this means that the normal hard key event will not insert a newline
3110     * into the text view, even if it is multi-line; holding down the ALT
3111     * modifier will, however, allow the user to insert a newline character.
3112     */
3113    public void setOnEditorActionListener(OnEditorActionListener l) {
3114        if (mInputContentType == null) {
3115            mInputContentType = new InputContentType();
3116        }
3117        mInputContentType.onEditorActionListener = l;
3118    }
3119
3120    /**
3121     * Called when an attached input method calls
3122     * {@link InputConnection#performEditorAction(int)
3123     * InputConnection.performEditorAction()}
3124     * for this text view.  The default implementation will call your action
3125     * listener supplied to {@link #setOnEditorActionListener}, or perform
3126     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3127     * EditorInfo.IME_ACTION_NEXT} or {@link EditorInfo#IME_ACTION_DONE
3128     * EditorInfo.IME_ACTION_DONE}.
3129     *
3130     * <p>For backwards compatibility, if no IME options have been set and the
3131     * text view would not normally advance focus on enter, then
3132     * the NEXT and DONE actions received here will be turned into an enter
3133     * key down/up pair to go through the normal key handling.
3134     *
3135     * @param actionCode The code of the action being performed.
3136     *
3137     * @see #setOnEditorActionListener
3138     */
3139    public void onEditorAction(int actionCode) {
3140        final InputContentType ict = mInputContentType;
3141        if (ict != null) {
3142            if (ict.onEditorActionListener != null) {
3143                if (ict.onEditorActionListener.onEditorAction(this,
3144                        actionCode, null)) {
3145                    return;
3146                }
3147            }
3148
3149            // This is the handling for some default action.
3150            // Note that for backwards compatibility we don't do this
3151            // default handling if explicit ime options have not been given,
3152            // instead turning this into the normal enter key codes that an
3153            // app may be expecting.
3154            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3155                View v = focusSearch(FOCUS_DOWN);
3156                if (v != null) {
3157                    if (!v.requestFocus(FOCUS_DOWN)) {
3158                        throw new IllegalStateException("focus search returned a view " +
3159                                "that wasn't able to take focus!");
3160                    }
3161                }
3162                return;
3163
3164            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3165                InputMethodManager imm = InputMethodManager.peekInstance();
3166                if (imm != null) {
3167                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3168                }
3169                return;
3170            }
3171        }
3172
3173        Handler h = getHandler();
3174        if (h != null) {
3175            long eventTime = SystemClock.uptimeMillis();
3176            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3177                    new KeyEvent(eventTime, eventTime,
3178                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0, 0, 0,
3179                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3180                    | KeyEvent.FLAG_EDITOR_ACTION)));
3181            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3182                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3183                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0, 0, 0,
3184                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3185                    | KeyEvent.FLAG_EDITOR_ACTION)));
3186        }
3187    }
3188
3189    /**
3190     * Set the private content type of the text, which is the
3191     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3192     * field that will be filled in when creating an input connection.
3193     *
3194     * @see #getPrivateImeOptions()
3195     * @see EditorInfo#privateImeOptions
3196     * @attr ref android.R.styleable#TextView_privateImeOptions
3197     */
3198    public void setPrivateImeOptions(String type) {
3199        if (mInputContentType == null) mInputContentType = new InputContentType();
3200        mInputContentType.privateImeOptions = type;
3201    }
3202
3203    /**
3204     * Get the private type of the content.
3205     *
3206     * @see #setPrivateImeOptions(String)
3207     * @see EditorInfo#privateImeOptions
3208     */
3209    public String getPrivateImeOptions() {
3210        return mInputContentType != null
3211                ? mInputContentType.privateImeOptions : null;
3212    }
3213
3214    /**
3215     * Set the extra input data of the text, which is the
3216     * {@link EditorInfo#extras TextBoxAttribute.extras}
3217     * Bundle that will be filled in when creating an input connection.  The
3218     * given integer is the resource ID of an XML resource holding an
3219     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3220     *
3221     * @see #getInputExtras(boolean)
3222     * @see EditorInfo#extras
3223     * @attr ref android.R.styleable#TextView_editorExtras
3224     */
3225    public void setInputExtras(int xmlResId)
3226            throws XmlPullParserException, IOException {
3227        XmlResourceParser parser = getResources().getXml(xmlResId);
3228        if (mInputContentType == null) mInputContentType = new InputContentType();
3229        mInputContentType.extras = new Bundle();
3230        getResources().parseBundleExtras(parser, mInputContentType.extras);
3231    }
3232
3233    /**
3234     * Retrieve the input extras currently associated with the text view, which
3235     * can be viewed as well as modified.
3236     *
3237     * @param create If true, the extras will be created if they don't already
3238     * exist.  Otherwise, null will be returned if none have been created.
3239     * @see #setInputExtras(int)
3240     * @see EditorInfo#extras
3241     * @attr ref android.R.styleable#TextView_editorExtras
3242     */
3243    public Bundle getInputExtras(boolean create) {
3244        if (mInputContentType == null) {
3245            if (!create) return null;
3246            mInputContentType = new InputContentType();
3247        }
3248        if (mInputContentType.extras == null) {
3249            if (!create) return null;
3250            mInputContentType.extras = new Bundle();
3251        }
3252        return mInputContentType.extras;
3253    }
3254
3255    /**
3256     * Returns the error message that was set to be displayed with
3257     * {@link #setError}, or <code>null</code> if no error was set
3258     * or if it the error was cleared by the widget after user input.
3259     */
3260    public CharSequence getError() {
3261        return mError;
3262    }
3263
3264    /**
3265     * Sets the right-hand compound drawable of the TextView to the "error"
3266     * icon and sets an error message that will be displayed in a popup when
3267     * the TextView has focus.  The icon and error message will be reset to
3268     * null when any key events cause changes to the TextView's text.  If the
3269     * <code>error</code> is <code>null</code>, the error message and icon
3270     * will be cleared.
3271     */
3272    @android.view.RemotableViewMethod
3273    public void setError(CharSequence error) {
3274        if (error == null) {
3275            setError(null, null);
3276        } else {
3277            Drawable dr = getContext().getResources().
3278                getDrawable(com.android.internal.R.drawable.
3279                            indicator_input_error);
3280
3281            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3282            setError(error, dr);
3283        }
3284    }
3285
3286    /**
3287     * Sets the right-hand compound drawable of the TextView to the specified
3288     * icon and sets an error message that will be displayed in a popup when
3289     * the TextView has focus.  The icon and error message will be reset to
3290     * null when any key events cause changes to the TextView's text.  The
3291     * drawable must already have had {@link Drawable#setBounds} set on it.
3292     * If the <code>error</code> is <code>null</code>, the error message will
3293     * be cleared (and you should provide a <code>null</code> icon as well).
3294     */
3295    public void setError(CharSequence error, Drawable icon) {
3296        error = TextUtils.stringOrSpannedString(error);
3297
3298        mError = error;
3299        mErrorWasChanged = true;
3300        final Drawables dr = mDrawables;
3301        if (dr != null) {
3302            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop,
3303                                 icon, dr.mDrawableBottom);
3304        } else {
3305            setCompoundDrawables(null, null, icon, null);
3306        }
3307
3308        if (error == null) {
3309            if (mPopup != null) {
3310                if (mPopup.isShowing()) {
3311                    mPopup.dismiss();
3312                }
3313
3314                mPopup = null;
3315            }
3316        } else {
3317            if (isFocused()) {
3318                showError();
3319            }
3320        }
3321    }
3322
3323    private void showError() {
3324        if (getWindowToken() == null) {
3325            mShowErrorAfterAttach = true;
3326            return;
3327        }
3328
3329        if (mPopup == null) {
3330            LayoutInflater inflater = LayoutInflater.from(getContext());
3331            final TextView err = (TextView) inflater.inflate(com.android.internal.R.layout.textview_hint,
3332                    null);
3333
3334            final float scale = getResources().getDisplayMetrics().density;
3335            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f),
3336                    (int) (50 * scale + 0.5f));
3337            mPopup.setFocusable(false);
3338            // The user is entering text, so the input method is needed.  We
3339            // don't want the popup to be displayed on top of it.
3340            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3341        }
3342
3343        TextView tv = (TextView) mPopup.getContentView();
3344        chooseSize(mPopup, mError, tv);
3345        tv.setText(mError);
3346
3347        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3348        mPopup.fixDirection(mPopup.isAboveAnchor());
3349    }
3350
3351    private static class ErrorPopup extends PopupWindow {
3352        private boolean mAbove = false;
3353        private final TextView mView;
3354
3355        ErrorPopup(TextView v, int width, int height) {
3356            super(v, width, height);
3357            mView = v;
3358        }
3359
3360        void fixDirection(boolean above) {
3361            mAbove = above;
3362
3363            if (above) {
3364                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error_above);
3365            } else {
3366                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error);
3367            }
3368        }
3369
3370        @Override
3371        public void update(int x, int y, int w, int h, boolean force) {
3372            super.update(x, y, w, h, force);
3373
3374            boolean above = isAboveAnchor();
3375            if (above != mAbove) {
3376                fixDirection(above);
3377            }
3378        }
3379    }
3380
3381    /**
3382     * Returns the Y offset to make the pointy top of the error point
3383     * at the middle of the error icon.
3384     */
3385    private int getErrorX() {
3386        /*
3387         * The "25" is the distance between the point and the right edge
3388         * of the background
3389         */
3390        final float scale = getResources().getDisplayMetrics().density;
3391
3392        final Drawables dr = mDrawables;
3393        return getWidth() - mPopup.getWidth()
3394                - getPaddingRight()
3395                - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3396    }
3397
3398    /**
3399     * Returns the Y offset to make the pointy top of the error point
3400     * at the bottom of the error icon.
3401     */
3402    private int getErrorY() {
3403        /*
3404         * Compound, not extended, because the icon is not clipped
3405         * if the text height is smaller.
3406         */
3407        int vspace = mBottom - mTop -
3408                     getCompoundPaddingBottom() - getCompoundPaddingTop();
3409
3410        final Drawables dr = mDrawables;
3411        int icontop = getCompoundPaddingTop()
3412                + (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3413
3414        /*
3415         * The "2" is the distance between the point and the top edge
3416         * of the background.
3417         */
3418
3419        return icontop + (dr != null ? dr.mDrawableHeightRight : 0)
3420                - getHeight() - 2;
3421    }
3422
3423    private void hideError() {
3424        if (mPopup != null) {
3425            if (mPopup.isShowing()) {
3426                mPopup.dismiss();
3427            }
3428        }
3429
3430        mShowErrorAfterAttach = false;
3431    }
3432
3433    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3434        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3435        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3436
3437        /*
3438         * Figure out how big the text would be if we laid it out to the
3439         * full width of this view minus the border.
3440         */
3441        int cap = getWidth() - wid;
3442        if (cap < 0) {
3443            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3444        }
3445
3446        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3447                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3448        float max = 0;
3449        for (int i = 0; i < l.getLineCount(); i++) {
3450            max = Math.max(max, l.getLineWidth(i));
3451        }
3452
3453        /*
3454         * Now set the popup size to be big enough for the text plus the border.
3455         */
3456        pop.setWidth(wid + (int) Math.ceil(max));
3457        pop.setHeight(ht + l.getHeight());
3458    }
3459
3460
3461    @Override
3462    protected boolean setFrame(int l, int t, int r, int b) {
3463        boolean result = super.setFrame(l, t, r, b);
3464
3465        if (mPopup != null) {
3466            TextView tv = (TextView) mPopup.getContentView();
3467            chooseSize(mPopup, mError, tv);
3468            mPopup.update(this, getErrorX(), getErrorY(),
3469                          mPopup.getWidth(), mPopup.getHeight());
3470        }
3471
3472        restartMarqueeIfNeeded();
3473
3474        return result;
3475    }
3476
3477    private void restartMarqueeIfNeeded() {
3478        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3479            mRestartMarquee = false;
3480            startMarquee();
3481        }
3482    }
3483
3484    /**
3485     * Sets the list of input filters that will be used if the buffer is
3486     * Editable.  Has no effect otherwise.
3487     *
3488     * @attr ref android.R.styleable#TextView_maxLength
3489     */
3490    public void setFilters(InputFilter[] filters) {
3491        if (filters == null) {
3492            throw new IllegalArgumentException();
3493        }
3494
3495        mFilters = filters;
3496
3497        if (mText instanceof Editable) {
3498            setFilters((Editable) mText, filters);
3499        }
3500    }
3501
3502    /**
3503     * Sets the list of input filters on the specified Editable,
3504     * and includes mInput in the list if it is an InputFilter.
3505     */
3506    private void setFilters(Editable e, InputFilter[] filters) {
3507        if (mInput instanceof InputFilter) {
3508            InputFilter[] nf = new InputFilter[filters.length + 1];
3509
3510            System.arraycopy(filters, 0, nf, 0, filters.length);
3511            nf[filters.length] = (InputFilter) mInput;
3512
3513            e.setFilters(nf);
3514        } else {
3515            e.setFilters(filters);
3516        }
3517    }
3518
3519    /**
3520     * Returns the current list of input filters.
3521     */
3522    public InputFilter[] getFilters() {
3523        return mFilters;
3524    }
3525
3526    /////////////////////////////////////////////////////////////////////////
3527
3528    private int getVerticalOffset(boolean forceNormal) {
3529        int voffset = 0;
3530        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3531
3532        Layout l = mLayout;
3533        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3534            l = mHintLayout;
3535        }
3536
3537        if (gravity != Gravity.TOP) {
3538            int boxht;
3539
3540            if (l == mHintLayout) {
3541                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3542                        getCompoundPaddingBottom();
3543            } else {
3544                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3545                        getExtendedPaddingBottom();
3546            }
3547            int textht = l.getHeight();
3548
3549            if (textht < boxht) {
3550                if (gravity == Gravity.BOTTOM)
3551                    voffset = boxht - textht;
3552                else // (gravity == Gravity.CENTER_VERTICAL)
3553                    voffset = (boxht - textht) >> 1;
3554            }
3555        }
3556        return voffset;
3557    }
3558
3559    private int getBottomVerticalOffset(boolean forceNormal) {
3560        int voffset = 0;
3561        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3562
3563        Layout l = mLayout;
3564        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3565            l = mHintLayout;
3566        }
3567
3568        if (gravity != Gravity.BOTTOM) {
3569            int boxht;
3570
3571            if (l == mHintLayout) {
3572                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3573                        getCompoundPaddingBottom();
3574            } else {
3575                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3576                        getExtendedPaddingBottom();
3577            }
3578            int textht = l.getHeight();
3579
3580            if (textht < boxht) {
3581                if (gravity == Gravity.TOP)
3582                    voffset = boxht - textht;
3583                else // (gravity == Gravity.CENTER_VERTICAL)
3584                    voffset = (boxht - textht) >> 1;
3585            }
3586        }
3587        return voffset;
3588    }
3589
3590    private void invalidateCursorPath() {
3591        if (mHighlightPathBogus) {
3592            invalidateCursor();
3593        } else {
3594            synchronized (sTempRect) {
3595                /*
3596                 * The reason for this concern about the thickness of the
3597                 * cursor and doing the floor/ceil on the coordinates is that
3598                 * some EditTexts (notably textfields in the Browser) have
3599                 * anti-aliased text where not all the characters are
3600                 * necessarily at integer-multiple locations.  This should
3601                 * make sure the entire cursor gets invalidated instead of
3602                 * sometimes missing half a pixel.
3603                 */
3604
3605                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3606                if (thick < 1.0f) {
3607                    thick = 1.0f;
3608                }
3609
3610                thick /= 2;
3611
3612                mHighlightPath.computeBounds(sTempRect, false);
3613
3614                int left = getCompoundPaddingLeft();
3615                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3616
3617                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3618                           (int) FloatMath.floor(top + sTempRect.top - thick),
3619                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3620                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3621            }
3622        }
3623    }
3624
3625    private void invalidateCursor() {
3626        int where = getSelectionEnd();
3627
3628        invalidateCursor(where, where, where);
3629    }
3630
3631    private void invalidateCursor(int a, int b, int c) {
3632        if (mLayout == null) {
3633            invalidate();
3634        } else {
3635            if (a >= 0 || b >= 0 || c >= 0) {
3636                int first = Math.min(Math.min(a, b), c);
3637                int last = Math.max(Math.max(a, b), c);
3638
3639                int line = mLayout.getLineForOffset(first);
3640                int top = mLayout.getLineTop(line);
3641
3642                // This is ridiculous, but the descent from the line above
3643                // can hang down into the line we really want to redraw,
3644                // so we have to invalidate part of the line above to make
3645                // sure everything that needs to be redrawn really is.
3646                // (But not the whole line above, because that would cause
3647                // the same problem with the descenders on the line above it!)
3648                if (line > 0) {
3649                    top -= mLayout.getLineDescent(line - 1);
3650                }
3651
3652                int line2;
3653
3654                if (first == last)
3655                    line2 = line;
3656                else
3657                    line2 = mLayout.getLineForOffset(last);
3658
3659                int bottom = mLayout.getLineTop(line2 + 1);
3660                int voffset = getVerticalOffset(true);
3661
3662                int left = getCompoundPaddingLeft() + mScrollX;
3663                invalidate(left, top + voffset + getExtendedPaddingTop(),
3664                           left + getWidth() - getCompoundPaddingLeft() -
3665                           getCompoundPaddingRight(),
3666                           bottom + voffset + getExtendedPaddingTop());
3667            }
3668        }
3669    }
3670
3671    private void registerForPreDraw() {
3672        final ViewTreeObserver observer = getViewTreeObserver();
3673        if (observer == null) {
3674            return;
3675        }
3676
3677        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3678            observer.addOnPreDrawListener(this);
3679            mPreDrawState = PREDRAW_PENDING;
3680        } else if (mPreDrawState == PREDRAW_DONE) {
3681            mPreDrawState = PREDRAW_PENDING;
3682        }
3683
3684        // else state is PREDRAW_PENDING, so keep waiting.
3685    }
3686
3687    /**
3688     * {@inheritDoc}
3689     */
3690    public boolean onPreDraw() {
3691        if (mPreDrawState != PREDRAW_PENDING) {
3692            return true;
3693        }
3694
3695        if (mLayout == null) {
3696            assumeLayout();
3697        }
3698
3699        boolean changed = false;
3700
3701        SelectionModifierCursorController selectionController = null;
3702        if (mSelectionModifierCursorController != null) {
3703            selectionController = (SelectionModifierCursorController)
3704                mSelectionModifierCursorController;
3705        }
3706
3707
3708        if (mMovement != null) {
3709            /* This code also provides auto-scrolling when a cursor is moved using a
3710             * CursorController (insertion point or selection limits).
3711             * For selection, ensure start or end is visible depending on controller's state.
3712             */
3713            int curs = getSelectionEnd();
3714            if (selectionController != null && selectionController.isSelectionStartDragged()) {
3715                curs = getSelectionStart();
3716            }
3717
3718            /*
3719             * TODO: This should really only keep the end in view if
3720             * it already was before the text changed.  I'm not sure
3721             * of a good way to tell from here if it was.
3722             */
3723            if (curs < 0 &&
3724                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3725                curs = mText.length();
3726            }
3727
3728            if (curs >= 0) {
3729                changed = bringPointIntoView(curs);
3730            }
3731        } else {
3732            changed = bringTextIntoView();
3733        }
3734
3735        // This has to be checked here since:
3736        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3737        //   a screen rotation) since layout is not yet initialized at that point.
3738        // - ExtractEditText does not call onFocus when it is displayed. Fixing this issue would
3739        //   allow to test for hasSelection in onFocusChanged, which would trigger a
3740        //   startTextSelectionMode here. TODO
3741        if (selectionController != null && hasSelection()) {
3742            startTextSelectionMode();
3743        }
3744
3745        mPreDrawState = PREDRAW_DONE;
3746        return !changed;
3747    }
3748
3749    @Override
3750    protected void onAttachedToWindow() {
3751        super.onAttachedToWindow();
3752
3753        mTemporaryDetach = false;
3754
3755        if (mShowErrorAfterAttach) {
3756            showError();
3757            mShowErrorAfterAttach = false;
3758        }
3759
3760        final ViewTreeObserver observer = getViewTreeObserver();
3761        if (observer != null) {
3762            if (mInsertionPointCursorController != null) {
3763                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3764            }
3765            if (mSelectionModifierCursorController != null) {
3766                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3767            }
3768        }
3769    }
3770
3771    @Override
3772    protected void onDetachedFromWindow() {
3773        super.onDetachedFromWindow();
3774
3775        final ViewTreeObserver observer = getViewTreeObserver();
3776        if (observer != null) {
3777            if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3778                observer.removeOnPreDrawListener(this);
3779                mPreDrawState = PREDRAW_NOT_REGISTERED;
3780            }
3781            if (mInsertionPointCursorController != null) {
3782                observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3783            }
3784            if (mSelectionModifierCursorController != null) {
3785                observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3786            }
3787        }
3788
3789        if (mError != null) {
3790            hideError();
3791        }
3792
3793        hideControllers();
3794    }
3795
3796    @Override
3797    protected boolean isPaddingOffsetRequired() {
3798        return mShadowRadius != 0 || mDrawables != null;
3799    }
3800
3801    @Override
3802    protected int getLeftPaddingOffset() {
3803        return getCompoundPaddingLeft() - mPaddingLeft +
3804                (int) Math.min(0, mShadowDx - mShadowRadius);
3805    }
3806
3807    @Override
3808    protected int getTopPaddingOffset() {
3809        return (int) Math.min(0, mShadowDy - mShadowRadius);
3810    }
3811
3812    @Override
3813    protected int getBottomPaddingOffset() {
3814        return (int) Math.max(0, mShadowDy + mShadowRadius);
3815    }
3816
3817    @Override
3818    protected int getRightPaddingOffset() {
3819        return -(getCompoundPaddingRight() - mPaddingRight) +
3820                (int) Math.max(0, mShadowDx + mShadowRadius);
3821    }
3822
3823    @Override
3824    protected boolean verifyDrawable(Drawable who) {
3825        final boolean verified = super.verifyDrawable(who);
3826        if (!verified && mDrawables != null) {
3827            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
3828                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
3829        }
3830        return verified;
3831    }
3832
3833    @Override
3834    public void invalidateDrawable(Drawable drawable) {
3835        if (verifyDrawable(drawable)) {
3836            final Rect dirty = drawable.getBounds();
3837            int scrollX = mScrollX;
3838            int scrollY = mScrollY;
3839
3840            // IMPORTANT: The coordinates below are based on the coordinates computed
3841            // for each compound drawable in onDraw(). Make sure to update each section
3842            // accordingly.
3843            final TextView.Drawables drawables = mDrawables;
3844            if (drawables != null) {
3845                if (drawable == drawables.mDrawableLeft) {
3846                    final int compoundPaddingTop = getCompoundPaddingTop();
3847                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3848                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3849
3850                    scrollX += mPaddingLeft;
3851                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
3852                } else if (drawable == drawables.mDrawableRight) {
3853                    final int compoundPaddingTop = getCompoundPaddingTop();
3854                    final int compoundPaddingBottom = getCompoundPaddingBottom();
3855                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
3856
3857                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
3858                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
3859                } else if (drawable == drawables.mDrawableTop) {
3860                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3861                    final int compoundPaddingRight = getCompoundPaddingRight();
3862                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3863
3864                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
3865                    scrollY += mPaddingTop;
3866                } else if (drawable == drawables.mDrawableBottom) {
3867                    final int compoundPaddingLeft = getCompoundPaddingLeft();
3868                    final int compoundPaddingRight = getCompoundPaddingRight();
3869                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
3870
3871                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
3872                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
3873                }
3874            }
3875
3876            invalidate(dirty.left + scrollX, dirty.top + scrollY,
3877                    dirty.right + scrollX, dirty.bottom + scrollY);
3878        }
3879    }
3880
3881    @Override
3882    protected void onDraw(Canvas canvas) {
3883        restartMarqueeIfNeeded();
3884
3885        // Draw the background for this view
3886        super.onDraw(canvas);
3887
3888        final int compoundPaddingLeft = getCompoundPaddingLeft();
3889        final int compoundPaddingTop = getCompoundPaddingTop();
3890        final int compoundPaddingRight = getCompoundPaddingRight();
3891        final int compoundPaddingBottom = getCompoundPaddingBottom();
3892        final int scrollX = mScrollX;
3893        final int scrollY = mScrollY;
3894        final int right = mRight;
3895        final int left = mLeft;
3896        final int bottom = mBottom;
3897        final int top = mTop;
3898
3899        final Drawables dr = mDrawables;
3900        if (dr != null) {
3901            /*
3902             * Compound, not extended, because the icon is not clipped
3903             * if the text height is smaller.
3904             */
3905
3906            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
3907            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
3908
3909            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3910            // Make sure to update invalidateDrawable() when changing this code.
3911            if (dr.mDrawableLeft != null) {
3912                canvas.save();
3913                canvas.translate(scrollX + mPaddingLeft,
3914                                 scrollY + compoundPaddingTop +
3915                                 (vspace - dr.mDrawableHeightLeft) / 2);
3916                dr.mDrawableLeft.draw(canvas);
3917                canvas.restore();
3918            }
3919
3920            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3921            // Make sure to update invalidateDrawable() when changing this code.
3922            if (dr.mDrawableRight != null) {
3923                canvas.save();
3924                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
3925                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
3926                dr.mDrawableRight.draw(canvas);
3927                canvas.restore();
3928            }
3929
3930            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3931            // Make sure to update invalidateDrawable() when changing this code.
3932            if (dr.mDrawableTop != null) {
3933                canvas.save();
3934                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
3935                        scrollY + mPaddingTop);
3936                dr.mDrawableTop.draw(canvas);
3937                canvas.restore();
3938            }
3939
3940            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
3941            // Make sure to update invalidateDrawable() when changing this code.
3942            if (dr.mDrawableBottom != null) {
3943                canvas.save();
3944                canvas.translate(scrollX + compoundPaddingLeft +
3945                        (hspace - dr.mDrawableWidthBottom) / 2,
3946                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
3947                dr.mDrawableBottom.draw(canvas);
3948                canvas.restore();
3949            }
3950        }
3951
3952        if (mPreDrawState == PREDRAW_DONE) {
3953            final ViewTreeObserver observer = getViewTreeObserver();
3954            if (observer != null) {
3955                observer.removeOnPreDrawListener(this);
3956                mPreDrawState = PREDRAW_NOT_REGISTERED;
3957            }
3958        }
3959
3960        int color = mCurTextColor;
3961
3962        if (mLayout == null) {
3963            assumeLayout();
3964        }
3965
3966        Layout layout = mLayout;
3967        int cursorcolor = color;
3968
3969        if (mHint != null && mText.length() == 0) {
3970            if (mHintTextColor != null) {
3971                color = mCurHintTextColor;
3972            }
3973
3974            layout = mHintLayout;
3975        }
3976
3977        mTextPaint.setColor(color);
3978        mTextPaint.drawableState = getDrawableState();
3979
3980        canvas.save();
3981        /*  Would be faster if we didn't have to do this. Can we chop the
3982            (displayable) text so that we don't need to do this ever?
3983        */
3984
3985        int extendedPaddingTop = getExtendedPaddingTop();
3986        int extendedPaddingBottom = getExtendedPaddingBottom();
3987
3988        float clipLeft = compoundPaddingLeft + scrollX;
3989        float clipTop = extendedPaddingTop + scrollY;
3990        float clipRight = right - left - compoundPaddingRight + scrollX;
3991        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
3992
3993        if (mShadowRadius != 0) {
3994            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
3995            clipRight += Math.max(0, mShadowDx + mShadowRadius);
3996
3997            clipTop += Math.min(0, mShadowDy - mShadowRadius);
3998            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
3999        }
4000
4001        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4002
4003        int voffsetText = 0;
4004        int voffsetCursor = 0;
4005
4006        // translate in by our padding
4007        {
4008            /* shortcircuit calling getVerticaOffset() */
4009            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4010                voffsetText = getVerticalOffset(false);
4011                voffsetCursor = getVerticalOffset(true);
4012            }
4013            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4014        }
4015
4016        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4017            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4018                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4019                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4020                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4021            }
4022
4023            if (mMarquee != null && mMarquee.isRunning()) {
4024                canvas.translate(-mMarquee.mScroll, 0.0f);
4025            }
4026        }
4027
4028        Path highlight = null;
4029        int selStart = -1, selEnd = -1;
4030
4031        //  If there is no movement method, then there can be no selection.
4032        //  Check that first and attempt to skip everything having to do with
4033        //  the cursor.
4034        //  XXX This is not strictly true -- a program could set the
4035        //  selection manually if it really wanted to.
4036        if (mMovement != null && (isFocused() || isPressed())) {
4037            selStart = getSelectionStart();
4038            selEnd = getSelectionEnd();
4039
4040            if (mCursorVisible && selStart >= 0 && isEnabled()) {
4041                if (mHighlightPath == null)
4042                    mHighlightPath = new Path();
4043
4044                if (selStart == selEnd) {
4045                    if ((SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4046                        if (mHighlightPathBogus) {
4047                            mHighlightPath.reset();
4048                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4049                            mHighlightPathBogus = false;
4050                        }
4051
4052                        // XXX should pass to skin instead of drawing directly
4053                        mHighlightPaint.setColor(cursorcolor);
4054                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4055
4056                        highlight = mHighlightPath;
4057                    }
4058                } else {
4059                    if (mHighlightPathBogus) {
4060                        mHighlightPath.reset();
4061                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4062                        mHighlightPathBogus = false;
4063                    }
4064
4065                    // XXX should pass to skin instead of drawing directly
4066                    mHighlightPaint.setColor(mHighlightColor);
4067                    mHighlightPaint.setStyle(Paint.Style.FILL);
4068
4069                    highlight = mHighlightPath;
4070                }
4071            }
4072        }
4073
4074        /*  Comment out until we decide what to do about animations
4075        boolean isLinearTextOn = false;
4076        if (currentTransformation != null) {
4077            isLinearTextOn = mTextPaint.isLinearTextOn();
4078            Matrix m = currentTransformation.getMatrix();
4079            if (!m.isIdentity()) {
4080                // mTextPaint.setLinearTextOn(true);
4081            }
4082        }
4083        */
4084
4085        final InputMethodState ims = mInputMethodState;
4086        if (ims != null && ims.mBatchEditNesting == 0) {
4087            InputMethodManager imm = InputMethodManager.peekInstance();
4088            if (imm != null) {
4089                if (imm.isActive(this)) {
4090                    boolean reported = false;
4091                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4092                        // We are in extract mode and the content has changed
4093                        // in some way... just report complete new text to the
4094                        // input method.
4095                        reported = reportExtractedText();
4096                    }
4097                    if (!reported && highlight != null) {
4098                        int candStart = -1;
4099                        int candEnd = -1;
4100                        if (mText instanceof Spannable) {
4101                            Spannable sp = (Spannable)mText;
4102                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4103                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4104                        }
4105                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4106                    }
4107                }
4108
4109                if (imm.isWatchingCursor(this) && highlight != null) {
4110                    highlight.computeBounds(ims.mTmpRectF, true);
4111                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4112
4113                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4114                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4115
4116                    ims.mTmpRectF.offset(0, voffsetCursor - voffsetText);
4117
4118                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4119                            (int)(ims.mTmpRectF.top + 0.5),
4120                            (int)(ims.mTmpRectF.right + 0.5),
4121                            (int)(ims.mTmpRectF.bottom + 0.5));
4122
4123                    imm.updateCursor(this,
4124                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4125                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4126                }
4127            }
4128        }
4129
4130        layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4131
4132        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4133            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4134            layout.draw(canvas, highlight, mHighlightPaint, voffsetCursor - voffsetText);
4135        }
4136
4137        /*  Comment out until we decide what to do about animations
4138        if (currentTransformation != null) {
4139            mTextPaint.setLinearTextOn(isLinearTextOn);
4140        }
4141        */
4142
4143        canvas.restore();
4144
4145        if (mInsertionPointCursorController != null &&
4146                mInsertionPointCursorController.isShowing()) {
4147            mInsertionPointCursorController.updatePosition();
4148        }
4149        if (mSelectionModifierCursorController != null &&
4150                mSelectionModifierCursorController.isShowing()) {
4151            mSelectionModifierCursorController.updatePosition();
4152        }
4153    }
4154
4155    @Override
4156    public void getFocusedRect(Rect r) {
4157        if (mLayout == null) {
4158            super.getFocusedRect(r);
4159            return;
4160        }
4161
4162        int sel = getSelectionEnd();
4163        if (sel < 0) {
4164            super.getFocusedRect(r);
4165            return;
4166        }
4167
4168        int line = mLayout.getLineForOffset(sel);
4169        r.top = mLayout.getLineTop(line);
4170        r.bottom = mLayout.getLineBottom(line);
4171
4172        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4173        r.right = r.left + 1;
4174
4175        // Adjust for padding and gravity.
4176        int paddingLeft = getCompoundPaddingLeft();
4177        int paddingTop = getExtendedPaddingTop();
4178        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4179            paddingTop += getVerticalOffset(false);
4180        }
4181        r.offset(paddingLeft, paddingTop);
4182    }
4183
4184    /**
4185     * Return the number of lines of text, or 0 if the internal Layout has not
4186     * been built.
4187     */
4188    public int getLineCount() {
4189        return mLayout != null ? mLayout.getLineCount() : 0;
4190    }
4191
4192    /**
4193     * Return the baseline for the specified line (0...getLineCount() - 1)
4194     * If bounds is not null, return the top, left, right, bottom extents
4195     * of the specified line in it. If the internal Layout has not been built,
4196     * return 0 and set bounds to (0, 0, 0, 0)
4197     * @param line which line to examine (0..getLineCount() - 1)
4198     * @param bounds Optional. If not null, it returns the extent of the line
4199     * @return the Y-coordinate of the baseline
4200     */
4201    public int getLineBounds(int line, Rect bounds) {
4202        if (mLayout == null) {
4203            if (bounds != null) {
4204                bounds.set(0, 0, 0, 0);
4205            }
4206            return 0;
4207        }
4208        else {
4209            int baseline = mLayout.getLineBounds(line, bounds);
4210
4211            int voffset = getExtendedPaddingTop();
4212            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4213                voffset += getVerticalOffset(true);
4214            }
4215            if (bounds != null) {
4216                bounds.offset(getCompoundPaddingLeft(), voffset);
4217            }
4218            return baseline + voffset;
4219        }
4220    }
4221
4222    @Override
4223    public int getBaseline() {
4224        if (mLayout == null) {
4225            return super.getBaseline();
4226        }
4227
4228        int voffset = 0;
4229        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4230            voffset = getVerticalOffset(true);
4231        }
4232
4233        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4234    }
4235
4236    @Override
4237    public boolean onKeyDown(int keyCode, KeyEvent event) {
4238        int which = doKeyDown(keyCode, event, null);
4239        if (which == 0) {
4240            // Go through default dispatching.
4241            return super.onKeyDown(keyCode, event);
4242        }
4243
4244        return true;
4245    }
4246
4247    @Override
4248    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4249        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4250
4251        int which = doKeyDown(keyCode, down, event);
4252        if (which == 0) {
4253            // Go through default dispatching.
4254            return super.onKeyMultiple(keyCode, repeatCount, event);
4255        }
4256        if (which == -1) {
4257            // Consumed the whole thing.
4258            return true;
4259        }
4260
4261        repeatCount--;
4262
4263        // We are going to dispatch the remaining events to either the input
4264        // or movement method.  To do this, we will just send a repeated stream
4265        // of down and up events until we have done the complete repeatCount.
4266        // It would be nice if those interfaces had an onKeyMultiple() method,
4267        // but adding that is a more complicated change.
4268        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4269        if (which == 1) {
4270            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4271            while (--repeatCount > 0) {
4272                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4273                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4274            }
4275            if (mError != null && !mErrorWasChanged) {
4276                setError(null, null);
4277            }
4278
4279        } else if (which == 2) {
4280            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4281            while (--repeatCount > 0) {
4282                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4283                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4284            }
4285        }
4286
4287        return true;
4288    }
4289
4290    /**
4291     * Returns true if pressing ENTER in this field advances focus instead
4292     * of inserting the character.  This is true mostly in single-line fields,
4293     * but also in mail addresses and subjects which will display on multiple
4294     * lines but where it doesn't make sense to insert newlines.
4295     */
4296    private boolean shouldAdvanceFocusOnEnter() {
4297        if (mInput == null) {
4298            return false;
4299        }
4300
4301        if (mSingleLine) {
4302            return true;
4303        }
4304
4305        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4306            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4307
4308            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
4309                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4310                return true;
4311            }
4312        }
4313
4314        return false;
4315    }
4316
4317    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4318        if (!isEnabled()) {
4319            return 0;
4320        }
4321
4322        switch (keyCode) {
4323            case KeyEvent.KEYCODE_ENTER:
4324                mEnterKeyIsDown = true;
4325                // If ALT modifier is held, then we always insert a
4326                // newline character.
4327                if ((event.getMetaState()&KeyEvent.META_ALT_ON) == 0) {
4328
4329                    // When mInputContentType is set, we know that we are
4330                    // running in a "modern" cupcake environment, so don't need
4331                    // to worry about the application trying to capture
4332                    // enter key events.
4333                    if (mInputContentType != null) {
4334
4335                        // If there is an action listener, given them a
4336                        // chance to consume the event.
4337                        if (mInputContentType.onEditorActionListener != null &&
4338                                mInputContentType.onEditorActionListener.onEditorAction(
4339                                this, EditorInfo.IME_NULL, event)) {
4340                            mInputContentType.enterDown = true;
4341                            // We are consuming the enter key for them.
4342                            return -1;
4343                        }
4344                    }
4345
4346                    // If our editor should move focus when enter is pressed, or
4347                    // this is a generated event from an IME action button, then
4348                    // don't let it be inserted into the text.
4349                    if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4350                            || shouldAdvanceFocusOnEnter()) {
4351                        return -1;
4352                    }
4353                }
4354                break;
4355
4356            case KeyEvent.KEYCODE_DPAD_CENTER:
4357                mDPadCenterIsDown = true;
4358                if (shouldAdvanceFocusOnEnter()) {
4359                    return 0;
4360                }
4361                break;
4362
4363                // Has to be done on key down (and not on key up) to correctly be intercepted.
4364            case KeyEvent.KEYCODE_BACK:
4365                if (mIsInTextSelectionMode) {
4366                    stopTextSelectionMode();
4367                    return -1;
4368                }
4369                break;
4370        }
4371
4372        if (mInput != null) {
4373            /*
4374             * Keep track of what the error was before doing the input
4375             * so that if an input filter changed the error, we leave
4376             * that error showing.  Otherwise, we take down whatever
4377             * error was showing when the user types something.
4378             */
4379            mErrorWasChanged = false;
4380
4381            boolean doDown = true;
4382            if (otherEvent != null) {
4383                try {
4384                    beginBatchEdit();
4385                    boolean handled = mInput.onKeyOther(this, (Editable) mText,
4386                            otherEvent);
4387                    if (mError != null && !mErrorWasChanged) {
4388                        setError(null, null);
4389                    }
4390                    doDown = false;
4391                    if (handled) {
4392                        return -1;
4393                    }
4394                } catch (AbstractMethodError e) {
4395                    // onKeyOther was added after 1.0, so if it isn't
4396                    // implemented we need to try to dispatch as a regular down.
4397                } finally {
4398                    endBatchEdit();
4399                }
4400            }
4401
4402            if (doDown) {
4403                beginBatchEdit();
4404                if (mInput.onKeyDown(this, (Editable) mText, keyCode, event)) {
4405                    endBatchEdit();
4406                    if (mError != null && !mErrorWasChanged) {
4407                        setError(null, null);
4408                    }
4409                    return 1;
4410                }
4411                endBatchEdit();
4412            }
4413        }
4414
4415        // bug 650865: sometimes we get a key event before a layout.
4416        // don't try to move around if we don't know the layout.
4417
4418        if (mMovement != null && mLayout != null) {
4419            boolean doDown = true;
4420            if (otherEvent != null) {
4421                try {
4422                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4423                            otherEvent);
4424                    doDown = false;
4425                    if (handled) {
4426                        return -1;
4427                    }
4428                } catch (AbstractMethodError e) {
4429                    // onKeyOther was added after 1.0, so if it isn't
4430                    // implemented we need to try to dispatch as a regular down.
4431                }
4432            }
4433            if (doDown) {
4434                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4435                    return 2;
4436            }
4437        }
4438
4439        return 0;
4440    }
4441
4442    @Override
4443    public boolean onKeyUp(int keyCode, KeyEvent event) {
4444        if (!isEnabled()) {
4445            return super.onKeyUp(keyCode, event);
4446        }
4447
4448        hideControllers();
4449
4450        switch (keyCode) {
4451            case KeyEvent.KEYCODE_DPAD_CENTER:
4452                mDPadCenterIsDown = false;
4453                /*
4454                 * If there is a click listener, just call through to
4455                 * super, which will invoke it.
4456                 *
4457                 * If there isn't a click listener, try to show the soft
4458                 * input method.  (It will also
4459                 * call performClick(), but that won't do anything in
4460                 * this case.)
4461                 */
4462                if (mOnClickListener == null) {
4463                    if (mMovement != null && mText instanceof Editable
4464                            && mLayout != null && onCheckIsTextEditor()) {
4465                        InputMethodManager imm = (InputMethodManager)
4466                                getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
4467                        imm.showSoftInput(this, 0);
4468                    }
4469                }
4470                return super.onKeyUp(keyCode, event);
4471
4472            case KeyEvent.KEYCODE_ENTER:
4473                mEnterKeyIsDown = false;
4474                if (mInputContentType != null
4475                        && mInputContentType.onEditorActionListener != null
4476                        && mInputContentType.enterDown) {
4477                    mInputContentType.enterDown = false;
4478                    if (mInputContentType.onEditorActionListener.onEditorAction(
4479                            this, EditorInfo.IME_NULL, event)) {
4480                        return true;
4481                    }
4482                }
4483
4484                if ((event.getFlags()&KeyEvent.FLAG_EDITOR_ACTION) != 0
4485                        || shouldAdvanceFocusOnEnter()) {
4486                    /*
4487                     * If there is a click listener, just call through to
4488                     * super, which will invoke it.
4489                     *
4490                     * If there isn't a click listener, try to advance focus,
4491                     * but still call through to super, which will reset the
4492                     * pressed state and longpress state.  (It will also
4493                     * call performClick(), but that won't do anything in
4494                     * this case.)
4495                     */
4496                    if (mOnClickListener == null) {
4497                        View v = focusSearch(FOCUS_DOWN);
4498
4499                        if (v != null) {
4500                            if (!v.requestFocus(FOCUS_DOWN)) {
4501                                throw new IllegalStateException("focus search returned a view " +
4502                                        "that wasn't able to take focus!");
4503                            }
4504
4505                            /*
4506                             * Return true because we handled the key; super
4507                             * will return false because there was no click
4508                             * listener.
4509                             */
4510                            super.onKeyUp(keyCode, event);
4511                            return true;
4512                        } else if ((event.getFlags()
4513                                & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4514                            // No target for next focus, but make sure the IME
4515                            // if this came from it.
4516                            InputMethodManager imm = InputMethodManager.peekInstance();
4517                            if (imm != null) {
4518                                imm.hideSoftInputFromWindow(getWindowToken(), 0);
4519                            }
4520                        }
4521                    }
4522
4523                    return super.onKeyUp(keyCode, event);
4524                }
4525                break;
4526        }
4527
4528        if (mInput != null)
4529            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4530                return true;
4531
4532        if (mMovement != null && mLayout != null)
4533            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4534                return true;
4535
4536        return super.onKeyUp(keyCode, event);
4537    }
4538
4539    @Override public boolean onCheckIsTextEditor() {
4540        return mInputType != EditorInfo.TYPE_NULL;
4541    }
4542
4543    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4544        if (onCheckIsTextEditor()) {
4545            if (mInputMethodState == null) {
4546                mInputMethodState = new InputMethodState();
4547            }
4548            outAttrs.inputType = mInputType;
4549            if (mInputContentType != null) {
4550                outAttrs.imeOptions = mInputContentType.imeOptions;
4551                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4552                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4553                outAttrs.actionId = mInputContentType.imeActionId;
4554                outAttrs.extras = mInputContentType.extras;
4555            } else {
4556                outAttrs.imeOptions = EditorInfo.IME_NULL;
4557            }
4558            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4559                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4560                if (focusSearch(FOCUS_DOWN) != null) {
4561                    // An action has not been set, but the enter key will move to
4562                    // the next focus, so set the action to that.
4563                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4564                } else {
4565                    // An action has not been set, and there is no focus to move
4566                    // to, so let's just supply a "done" action.
4567                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4568                }
4569                if (!shouldAdvanceFocusOnEnter()) {
4570                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4571                }
4572            }
4573            if ((outAttrs.inputType & (InputType.TYPE_MASK_CLASS
4574                    | InputType.TYPE_TEXT_FLAG_MULTI_LINE))
4575                    == (InputType.TYPE_CLASS_TEXT
4576                            | InputType.TYPE_TEXT_FLAG_MULTI_LINE)) {
4577                // Multi-line text editors should always show an enter key.
4578                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4579            }
4580            outAttrs.hintText = mHint;
4581            if (mText instanceof Editable) {
4582                InputConnection ic = new EditableInputConnection(this);
4583                outAttrs.initialSelStart = getSelectionStart();
4584                outAttrs.initialSelEnd = getSelectionEnd();
4585                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4586                return ic;
4587            }
4588        }
4589        return null;
4590    }
4591
4592    /**
4593     * If this TextView contains editable content, extract a portion of it
4594     * based on the information in <var>request</var> in to <var>outText</var>.
4595     * @return Returns true if the text was successfully extracted, else false.
4596     */
4597    public boolean extractText(ExtractedTextRequest request,
4598            ExtractedText outText) {
4599        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4600                EXTRACT_UNKNOWN, outText);
4601    }
4602
4603    static final int EXTRACT_NOTHING = -2;
4604    static final int EXTRACT_UNKNOWN = -1;
4605
4606    boolean extractTextInternal(ExtractedTextRequest request,
4607            int partialStartOffset, int partialEndOffset, int delta,
4608            ExtractedText outText) {
4609        final CharSequence content = mText;
4610        if (content != null) {
4611            if (partialStartOffset != EXTRACT_NOTHING) {
4612                final int N = content.length();
4613                if (partialStartOffset < 0) {
4614                    outText.partialStartOffset = outText.partialEndOffset = -1;
4615                    partialStartOffset = 0;
4616                    partialEndOffset = N;
4617                } else {
4618                    // Adjust offsets to ensure we contain full spans.
4619                    if (content instanceof Spanned) {
4620                        Spanned spanned = (Spanned)content;
4621                        Object[] spans = spanned.getSpans(partialStartOffset,
4622                                partialEndOffset, ParcelableSpan.class);
4623                        int i = spans.length;
4624                        while (i > 0) {
4625                            i--;
4626                            int j = spanned.getSpanStart(spans[i]);
4627                            if (j < partialStartOffset) partialStartOffset = j;
4628                            j = spanned.getSpanEnd(spans[i]);
4629                            if (j > partialEndOffset) partialEndOffset = j;
4630                        }
4631                    }
4632                    outText.partialStartOffset = partialStartOffset;
4633                    outText.partialEndOffset = partialEndOffset;
4634                    // Now use the delta to determine the actual amount of text
4635                    // we need.
4636                    partialEndOffset += delta;
4637                    if (partialStartOffset > N) {
4638                        partialStartOffset = N;
4639                    } else if (partialStartOffset < 0) {
4640                        partialStartOffset = 0;
4641                    }
4642                    if (partialEndOffset > N) {
4643                        partialEndOffset = N;
4644                    } else if (partialEndOffset < 0) {
4645                        partialEndOffset = 0;
4646                    }
4647                }
4648                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
4649                    outText.text = content.subSequence(partialStartOffset,
4650                            partialEndOffset);
4651                } else {
4652                    outText.text = TextUtils.substring(content, partialStartOffset,
4653                            partialEndOffset);
4654                }
4655            } else {
4656                outText.partialStartOffset = 0;
4657                outText.partialEndOffset = 0;
4658                outText.text = "";
4659            }
4660            outText.flags = 0;
4661            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
4662                outText.flags |= ExtractedText.FLAG_SELECTING;
4663            }
4664            if (mSingleLine) {
4665                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
4666            }
4667            outText.startOffset = 0;
4668            outText.selectionStart = getSelectionStart();
4669            outText.selectionEnd = getSelectionEnd();
4670            return true;
4671        }
4672        return false;
4673    }
4674
4675    boolean reportExtractedText() {
4676        final InputMethodState ims = mInputMethodState;
4677        if (ims != null) {
4678            final boolean contentChanged = ims.mContentChanged;
4679            if (contentChanged || ims.mSelectionModeChanged) {
4680                ims.mContentChanged = false;
4681                ims.mSelectionModeChanged = false;
4682                final ExtractedTextRequest req = mInputMethodState.mExtracting;
4683                if (req != null) {
4684                    InputMethodManager imm = InputMethodManager.peekInstance();
4685                    if (imm != null) {
4686                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
4687                                + ims.mChangedStart + " end=" + ims.mChangedEnd
4688                                + " delta=" + ims.mChangedDelta);
4689                        if (ims.mChangedStart < 0 && !contentChanged) {
4690                            ims.mChangedStart = EXTRACT_NOTHING;
4691                        }
4692                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
4693                                ims.mChangedDelta, ims.mTmpExtracted)) {
4694                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
4695                                    + ims.mTmpExtracted.partialStartOffset
4696                                    + " end=" + ims.mTmpExtracted.partialEndOffset
4697                                    + ": " + ims.mTmpExtracted.text);
4698                            imm.updateExtractedText(this, req.token,
4699                                    mInputMethodState.mTmpExtracted);
4700                            return true;
4701                        }
4702                    }
4703                }
4704            }
4705        }
4706        return false;
4707    }
4708
4709    /**
4710     * This is used to remove all style-impacting spans from text before new
4711     * extracted text is being replaced into it, so that we don't have any
4712     * lingering spans applied during the replace.
4713     */
4714    static void removeParcelableSpans(Spannable spannable, int start, int end) {
4715        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
4716        int i = spans.length;
4717        while (i > 0) {
4718            i--;
4719            spannable.removeSpan(spans[i]);
4720        }
4721    }
4722
4723    /**
4724     * Apply to this text view the given extracted text, as previously
4725     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
4726     */
4727    public void setExtractedText(ExtractedText text) {
4728        Editable content = getEditableText();
4729        if (text.text != null) {
4730            if (content == null) {
4731                setText(text.text, TextView.BufferType.EDITABLE);
4732            } else if (text.partialStartOffset < 0) {
4733                removeParcelableSpans(content, 0, content.length());
4734                content.replace(0, content.length(), text.text);
4735            } else {
4736                final int N = content.length();
4737                int start = text.partialStartOffset;
4738                if (start > N) start = N;
4739                int end = text.partialEndOffset;
4740                if (end > N) end = N;
4741                removeParcelableSpans(content, start, end);
4742                content.replace(start, end, text.text);
4743            }
4744        }
4745
4746        // Now set the selection position...  make sure it is in range, to
4747        // avoid crashes.  If this is a partial update, it is possible that
4748        // the underlying text may have changed, causing us problems here.
4749        // Also we just don't want to trust clients to do the right thing.
4750        Spannable sp = (Spannable)getText();
4751        final int N = sp.length();
4752        int start = text.selectionStart;
4753        if (start < 0) start = 0;
4754        else if (start > N) start = N;
4755        int end = text.selectionEnd;
4756        if (end < 0) end = 0;
4757        else if (end > N) end = N;
4758        Selection.setSelection(sp, start, end);
4759
4760        // Finally, update the selection mode.
4761        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
4762            MetaKeyKeyListener.startSelecting(this, sp);
4763        } else {
4764            MetaKeyKeyListener.stopSelecting(this, sp);
4765        }
4766    }
4767
4768    /**
4769     * @hide
4770     */
4771    public void setExtracting(ExtractedTextRequest req) {
4772        if (mInputMethodState != null) {
4773            mInputMethodState.mExtracting = req;
4774        }
4775        hideControllers();
4776    }
4777
4778    /**
4779     * Called by the framework in response to a text completion from
4780     * the current input method, provided by it calling
4781     * {@link InputConnection#commitCompletion
4782     * InputConnection.commitCompletion()}.  The default implementation does
4783     * nothing; text views that are supporting auto-completion should override
4784     * this to do their desired behavior.
4785     *
4786     * @param text The auto complete text the user has selected.
4787     */
4788    public void onCommitCompletion(CompletionInfo text) {
4789    }
4790
4791    public void beginBatchEdit() {
4792        final InputMethodState ims = mInputMethodState;
4793        if (ims != null) {
4794            int nesting = ++ims.mBatchEditNesting;
4795            if (nesting == 1) {
4796                ims.mCursorChanged = false;
4797                ims.mChangedDelta = 0;
4798                if (ims.mContentChanged) {
4799                    // We already have a pending change from somewhere else,
4800                    // so turn this into a full update.
4801                    ims.mChangedStart = 0;
4802                    ims.mChangedEnd = mText.length();
4803                } else {
4804                    ims.mChangedStart = EXTRACT_UNKNOWN;
4805                    ims.mChangedEnd = EXTRACT_UNKNOWN;
4806                    ims.mContentChanged = false;
4807                }
4808                onBeginBatchEdit();
4809            }
4810        }
4811    }
4812
4813    public void endBatchEdit() {
4814        final InputMethodState ims = mInputMethodState;
4815        if (ims != null) {
4816            int nesting = --ims.mBatchEditNesting;
4817            if (nesting == 0) {
4818                finishBatchEdit(ims);
4819            }
4820        }
4821    }
4822
4823    void ensureEndedBatchEdit() {
4824        final InputMethodState ims = mInputMethodState;
4825        if (ims != null && ims.mBatchEditNesting != 0) {
4826            ims.mBatchEditNesting = 0;
4827            finishBatchEdit(ims);
4828        }
4829    }
4830
4831    void finishBatchEdit(final InputMethodState ims) {
4832        onEndBatchEdit();
4833
4834        if (ims.mContentChanged || ims.mSelectionModeChanged) {
4835            updateAfterEdit();
4836            reportExtractedText();
4837        } else if (ims.mCursorChanged) {
4838            // Cheezy way to get us to report the current cursor location.
4839            invalidateCursor();
4840        }
4841    }
4842
4843    void updateAfterEdit() {
4844        invalidate();
4845        int curs = getSelectionStart();
4846
4847        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
4848                             Gravity.BOTTOM) {
4849            registerForPreDraw();
4850        }
4851
4852        if (curs >= 0) {
4853            mHighlightPathBogus = true;
4854
4855            if (isFocused()) {
4856                mShowCursor = SystemClock.uptimeMillis();
4857                makeBlink();
4858            }
4859        }
4860
4861        checkForResize();
4862    }
4863
4864    /**
4865     * Called by the framework in response to a request to begin a batch
4866     * of edit operations through a call to link {@link #beginBatchEdit()}.
4867     */
4868    public void onBeginBatchEdit() {
4869    }
4870
4871    /**
4872     * Called by the framework in response to a request to end a batch
4873     * of edit operations through a call to link {@link #endBatchEdit}.
4874     */
4875    public void onEndBatchEdit() {
4876    }
4877
4878    /**
4879     * Called by the framework in response to a private command from the
4880     * current method, provided by it calling
4881     * {@link InputConnection#performPrivateCommand
4882     * InputConnection.performPrivateCommand()}.
4883     *
4884     * @param action The action name of the command.
4885     * @param data Any additional data for the command.  This may be null.
4886     * @return Return true if you handled the command, else false.
4887     */
4888    public boolean onPrivateIMECommand(String action, Bundle data) {
4889        return false;
4890    }
4891
4892    private void nullLayouts() {
4893        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
4894            mSavedLayout = (BoringLayout) mLayout;
4895        }
4896        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
4897            mSavedHintLayout = (BoringLayout) mHintLayout;
4898        }
4899
4900        mLayout = mHintLayout = null;
4901    }
4902
4903    /**
4904     * Make a new Layout based on the already-measured size of the view,
4905     * on the assumption that it was measured correctly at some point.
4906     */
4907    private void assumeLayout() {
4908        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
4909
4910        if (width < 1) {
4911            width = 0;
4912        }
4913
4914        int physicalWidth = width;
4915
4916        if (mHorizontallyScrolling) {
4917            width = VERY_WIDE;
4918        }
4919
4920        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
4921                      physicalWidth, false);
4922    }
4923
4924    /**
4925     * The width passed in is now the desired layout width,
4926     * not the full view width with padding.
4927     * {@hide}
4928     */
4929    protected void makeNewLayout(int w, int hintWidth,
4930                                 BoringLayout.Metrics boring,
4931                                 BoringLayout.Metrics hintBoring,
4932                                 int ellipsisWidth, boolean bringIntoView) {
4933        stopMarquee();
4934
4935        mHighlightPathBogus = true;
4936
4937        if (w < 0) {
4938            w = 0;
4939        }
4940        if (hintWidth < 0) {
4941            hintWidth = 0;
4942        }
4943
4944        Layout.Alignment alignment;
4945        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
4946            case Gravity.CENTER_HORIZONTAL:
4947                alignment = Layout.Alignment.ALIGN_CENTER;
4948                break;
4949
4950            case Gravity.RIGHT:
4951                alignment = Layout.Alignment.ALIGN_OPPOSITE;
4952                break;
4953
4954            default:
4955                alignment = Layout.Alignment.ALIGN_NORMAL;
4956        }
4957
4958        boolean shouldEllipsize = mEllipsize != null && mInput == null;
4959
4960        if (mText instanceof Spannable) {
4961            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
4962                    alignment, mSpacingMult,
4963                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
4964                    ellipsisWidth);
4965        } else {
4966            if (boring == UNKNOWN_BORING) {
4967                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
4968                                               mBoring);
4969                if (boring != null) {
4970                    mBoring = boring;
4971                }
4972            }
4973
4974            if (boring != null) {
4975                if (boring.width <= w &&
4976                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
4977                    if (mSavedLayout != null) {
4978                        mLayout = mSavedLayout.
4979                                replaceOrMake(mTransformed, mTextPaint,
4980                                w, alignment, mSpacingMult, mSpacingAdd,
4981                                boring, mIncludePad);
4982                    } else {
4983                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4984                                w, alignment, mSpacingMult, mSpacingAdd,
4985                                boring, mIncludePad);
4986                    }
4987
4988                    mSavedLayout = (BoringLayout) mLayout;
4989                } else if (shouldEllipsize && boring.width <= w) {
4990                    if (mSavedLayout != null) {
4991                        mLayout = mSavedLayout.
4992                                replaceOrMake(mTransformed, mTextPaint,
4993                                w, alignment, mSpacingMult, mSpacingAdd,
4994                                boring, mIncludePad, mEllipsize,
4995                                ellipsisWidth);
4996                    } else {
4997                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
4998                                w, alignment, mSpacingMult, mSpacingAdd,
4999                                boring, mIncludePad, mEllipsize,
5000                                ellipsisWidth);
5001                    }
5002                } else if (shouldEllipsize) {
5003                    mLayout = new StaticLayout(mTransformed,
5004                                0, mTransformed.length(),
5005                                mTextPaint, w, alignment, mSpacingMult,
5006                                mSpacingAdd, mIncludePad, mEllipsize,
5007                                ellipsisWidth);
5008                } else {
5009                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5010                            w, alignment, mSpacingMult, mSpacingAdd,
5011                            mIncludePad);
5012                }
5013            } else if (shouldEllipsize) {
5014                mLayout = new StaticLayout(mTransformed,
5015                            0, mTransformed.length(),
5016                            mTextPaint, w, alignment, mSpacingMult,
5017                            mSpacingAdd, mIncludePad, mEllipsize,
5018                            ellipsisWidth);
5019            } else {
5020                mLayout = new StaticLayout(mTransformed, mTextPaint,
5021                        w, alignment, mSpacingMult, mSpacingAdd,
5022                        mIncludePad);
5023            }
5024        }
5025
5026        shouldEllipsize = mEllipsize != null;
5027        mHintLayout = null;
5028
5029        if (mHint != null) {
5030            if (shouldEllipsize) hintWidth = w;
5031
5032            if (hintBoring == UNKNOWN_BORING) {
5033                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5034                                                   mHintBoring);
5035                if (hintBoring != null) {
5036                    mHintBoring = hintBoring;
5037                }
5038            }
5039
5040            if (hintBoring != null) {
5041                if (hintBoring.width <= hintWidth &&
5042                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5043                    if (mSavedHintLayout != null) {
5044                        mHintLayout = mSavedHintLayout.
5045                                replaceOrMake(mHint, mTextPaint,
5046                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5047                                hintBoring, mIncludePad);
5048                    } else {
5049                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5050                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5051                                hintBoring, mIncludePad);
5052                    }
5053
5054                    mSavedHintLayout = (BoringLayout) mHintLayout;
5055                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5056                    if (mSavedHintLayout != null) {
5057                        mHintLayout = mSavedHintLayout.
5058                                replaceOrMake(mHint, mTextPaint,
5059                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5060                                hintBoring, mIncludePad, mEllipsize,
5061                                ellipsisWidth);
5062                    } else {
5063                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5064                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5065                                hintBoring, mIncludePad, mEllipsize,
5066                                ellipsisWidth);
5067                    }
5068                } else if (shouldEllipsize) {
5069                    mHintLayout = new StaticLayout(mHint,
5070                                0, mHint.length(),
5071                                mTextPaint, hintWidth, alignment, mSpacingMult,
5072                                mSpacingAdd, mIncludePad, mEllipsize,
5073                                ellipsisWidth);
5074                } else {
5075                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5076                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5077                            mIncludePad);
5078                }
5079            } else if (shouldEllipsize) {
5080                mHintLayout = new StaticLayout(mHint,
5081                            0, mHint.length(),
5082                            mTextPaint, hintWidth, alignment, mSpacingMult,
5083                            mSpacingAdd, mIncludePad, mEllipsize,
5084                            ellipsisWidth);
5085            } else {
5086                mHintLayout = new StaticLayout(mHint, mTextPaint,
5087                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5088                        mIncludePad);
5089            }
5090        }
5091
5092        if (bringIntoView) {
5093            registerForPreDraw();
5094        }
5095
5096        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5097            if (!compressText(ellipsisWidth)) {
5098                final int height = mLayoutParams.height;
5099                // If the size of the view does not depend on the size of the text, try to
5100                // start the marquee immediately
5101                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5102                    startMarquee();
5103                } else {
5104                    // Defer the start of the marquee until we know our width (see setFrame())
5105                    mRestartMarquee = true;
5106                }
5107            }
5108        }
5109
5110        // CursorControllers need a non-null mLayout
5111        prepareCursorControllers();
5112    }
5113
5114    private boolean compressText(float width) {
5115        // Only compress the text if it hasn't been compressed by the previous pass
5116        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5117                mTextPaint.getTextScaleX() == 1.0f) {
5118            final float textWidth = mLayout.getLineWidth(0);
5119            final float overflow = (textWidth + 1.0f - width) / width;
5120            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5121                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5122                post(new Runnable() {
5123                    public void run() {
5124                        requestLayout();
5125                    }
5126                });
5127                return true;
5128            }
5129        }
5130
5131        return false;
5132    }
5133
5134    private static int desired(Layout layout) {
5135        int n = layout.getLineCount();
5136        CharSequence text = layout.getText();
5137        float max = 0;
5138
5139        // if any line was wrapped, we can't use it.
5140        // but it's ok for the last line not to have a newline
5141
5142        for (int i = 0; i < n - 1; i++) {
5143            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5144                return -1;
5145        }
5146
5147        for (int i = 0; i < n; i++) {
5148            max = Math.max(max, layout.getLineWidth(i));
5149        }
5150
5151        return (int) FloatMath.ceil(max);
5152    }
5153
5154    /**
5155     * Set whether the TextView includes extra top and bottom padding to make
5156     * room for accents that go above the normal ascent and descent.
5157     * The default is true.
5158     *
5159     * @attr ref android.R.styleable#TextView_includeFontPadding
5160     */
5161    public void setIncludeFontPadding(boolean includepad) {
5162        mIncludePad = includepad;
5163
5164        if (mLayout != null) {
5165            nullLayouts();
5166            requestLayout();
5167            invalidate();
5168        }
5169    }
5170
5171    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5172
5173    @Override
5174    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5175        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5176        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5177        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5178        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5179
5180        int width;
5181        int height;
5182
5183        BoringLayout.Metrics boring = UNKNOWN_BORING;
5184        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5185
5186        int des = -1;
5187        boolean fromexisting = false;
5188
5189        if (widthMode == MeasureSpec.EXACTLY) {
5190            // Parent has told us how big to be. So be it.
5191            width = widthSize;
5192        } else {
5193            if (mLayout != null && mEllipsize == null) {
5194                des = desired(mLayout);
5195            }
5196
5197            if (des < 0) {
5198                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5199                if (boring != null) {
5200                    mBoring = boring;
5201                }
5202            } else {
5203                fromexisting = true;
5204            }
5205
5206            if (boring == null || boring == UNKNOWN_BORING) {
5207                if (des < 0) {
5208                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5209                }
5210
5211                width = des;
5212            } else {
5213                width = boring.width;
5214            }
5215
5216            final Drawables dr = mDrawables;
5217            if (dr != null) {
5218                width = Math.max(width, dr.mDrawableWidthTop);
5219                width = Math.max(width, dr.mDrawableWidthBottom);
5220            }
5221
5222            if (mHint != null) {
5223                int hintDes = -1;
5224                int hintWidth;
5225
5226                if (mHintLayout != null && mEllipsize == null) {
5227                    hintDes = desired(mHintLayout);
5228                }
5229
5230                if (hintDes < 0) {
5231                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5232                    if (hintBoring != null) {
5233                        mHintBoring = hintBoring;
5234                    }
5235                }
5236
5237                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5238                    if (hintDes < 0) {
5239                        hintDes = (int) FloatMath.ceil(
5240                                Layout.getDesiredWidth(mHint, mTextPaint));
5241                    }
5242
5243                    hintWidth = hintDes;
5244                } else {
5245                    hintWidth = hintBoring.width;
5246                }
5247
5248                if (hintWidth > width) {
5249                    width = hintWidth;
5250                }
5251            }
5252
5253            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5254
5255            if (mMaxWidthMode == EMS) {
5256                width = Math.min(width, mMaxWidth * getLineHeight());
5257            } else {
5258                width = Math.min(width, mMaxWidth);
5259            }
5260
5261            if (mMinWidthMode == EMS) {
5262                width = Math.max(width, mMinWidth * getLineHeight());
5263            } else {
5264                width = Math.max(width, mMinWidth);
5265            }
5266
5267            // Check against our minimum width
5268            width = Math.max(width, getSuggestedMinimumWidth());
5269
5270            if (widthMode == MeasureSpec.AT_MOST) {
5271                width = Math.min(widthSize, width);
5272            }
5273        }
5274
5275        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5276        int unpaddedWidth = want;
5277        int hintWant = want;
5278
5279        if (mHorizontallyScrolling)
5280            want = VERY_WIDE;
5281
5282        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5283
5284        if (mLayout == null) {
5285            makeNewLayout(want, hintWant, boring, hintBoring,
5286                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5287        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5288                   (mLayout.getEllipsizedWidth() !=
5289                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5290            if (mHint == null && mEllipsize == null &&
5291                    want > mLayout.getWidth() &&
5292                    (mLayout instanceof BoringLayout ||
5293                            (fromexisting && des >= 0 && des <= want))) {
5294                mLayout.increaseWidthTo(want);
5295            } else {
5296                makeNewLayout(want, hintWant, boring, hintBoring,
5297                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5298            }
5299        } else {
5300            // Width has not changed.
5301        }
5302
5303        if (heightMode == MeasureSpec.EXACTLY) {
5304            // Parent has told us how big to be. So be it.
5305            height = heightSize;
5306            mDesiredHeightAtMeasure = -1;
5307        } else {
5308            int desired = getDesiredHeight();
5309
5310            height = desired;
5311            mDesiredHeightAtMeasure = desired;
5312
5313            if (heightMode == MeasureSpec.AT_MOST) {
5314                height = Math.min(desired, heightSize);
5315            }
5316        }
5317
5318        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5319        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5320            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5321        }
5322
5323        /*
5324         * We didn't let makeNewLayout() register to bring the cursor into view,
5325         * so do it here if there is any possibility that it is needed.
5326         */
5327        if (mMovement != null ||
5328            mLayout.getWidth() > unpaddedWidth ||
5329            mLayout.getHeight() > unpaddedHeight) {
5330            registerForPreDraw();
5331        } else {
5332            scrollTo(0, 0);
5333        }
5334
5335        setMeasuredDimension(width, height);
5336    }
5337
5338    private int getDesiredHeight() {
5339        return Math.max(
5340                getDesiredHeight(mLayout, true),
5341                getDesiredHeight(mHintLayout, mEllipsize != null));
5342    }
5343
5344    private int getDesiredHeight(Layout layout, boolean cap) {
5345        if (layout == null) {
5346            return 0;
5347        }
5348
5349        int linecount = layout.getLineCount();
5350        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5351        int desired = layout.getLineTop(linecount);
5352
5353        final Drawables dr = mDrawables;
5354        if (dr != null) {
5355            desired = Math.max(desired, dr.mDrawableHeightLeft);
5356            desired = Math.max(desired, dr.mDrawableHeightRight);
5357        }
5358
5359        desired += pad;
5360
5361        if (mMaxMode == LINES) {
5362            /*
5363             * Don't cap the hint to a certain number of lines.
5364             * (Do cap it, though, if we have a maximum pixel height.)
5365             */
5366            if (cap) {
5367                if (linecount > mMaximum) {
5368                    desired = layout.getLineTop(mMaximum) +
5369                              layout.getBottomPadding();
5370
5371                    if (dr != null) {
5372                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5373                        desired = Math.max(desired, dr.mDrawableHeightRight);
5374                    }
5375
5376                    desired += pad;
5377                    linecount = mMaximum;
5378                }
5379            }
5380        } else {
5381            desired = Math.min(desired, mMaximum);
5382        }
5383
5384        if (mMinMode == LINES) {
5385            if (linecount < mMinimum) {
5386                desired += getLineHeight() * (mMinimum - linecount);
5387            }
5388        } else {
5389            desired = Math.max(desired, mMinimum);
5390        }
5391
5392        // Check against our minimum height
5393        desired = Math.max(desired, getSuggestedMinimumHeight());
5394
5395        return desired;
5396    }
5397
5398    /**
5399     * Check whether a change to the existing text layout requires a
5400     * new view layout.
5401     */
5402    private void checkForResize() {
5403        boolean sizeChanged = false;
5404
5405        if (mLayout != null) {
5406            // Check if our width changed
5407            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5408                sizeChanged = true;
5409                invalidate();
5410            }
5411
5412            // Check if our height changed
5413            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5414                int desiredHeight = getDesiredHeight();
5415
5416                if (desiredHeight != this.getHeight()) {
5417                    sizeChanged = true;
5418                }
5419            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5420                if (mDesiredHeightAtMeasure >= 0) {
5421                    int desiredHeight = getDesiredHeight();
5422
5423                    if (desiredHeight != mDesiredHeightAtMeasure) {
5424                        sizeChanged = true;
5425                    }
5426                }
5427            }
5428        }
5429
5430        if (sizeChanged) {
5431            requestLayout();
5432            // caller will have already invalidated
5433        }
5434    }
5435
5436    /**
5437     * Check whether entirely new text requires a new view layout
5438     * or merely a new text layout.
5439     */
5440    private void checkForRelayout() {
5441        // If we have a fixed width, we can just swap in a new text layout
5442        // if the text height stays the same or if the view height is fixed.
5443
5444        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5445                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5446                (mHint == null || mHintLayout != null) &&
5447                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5448            // Static width, so try making a new text layout.
5449
5450            int oldht = mLayout.getHeight();
5451            int want = mLayout.getWidth();
5452            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5453
5454            /*
5455             * No need to bring the text into view, since the size is not
5456             * changing (unless we do the requestLayout(), in which case it
5457             * will happen at measure).
5458             */
5459            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5460                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5461                          false);
5462
5463            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5464                // In a fixed-height view, so use our new text layout.
5465                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5466                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5467                    invalidate();
5468                    return;
5469                }
5470
5471                // Dynamic height, but height has stayed the same,
5472                // so use our new text layout.
5473                if (mLayout.getHeight() == oldht &&
5474                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5475                    invalidate();
5476                    return;
5477                }
5478            }
5479
5480            // We lose: the height has changed and we have a dynamic height.
5481            // Request a new view layout using our new text layout.
5482            requestLayout();
5483            invalidate();
5484        } else {
5485            // Dynamic width, so we have no choice but to request a new
5486            // view layout with a new text layout.
5487
5488            nullLayouts();
5489            requestLayout();
5490            invalidate();
5491        }
5492    }
5493
5494    /**
5495     * Returns true if anything changed.
5496     */
5497    private boolean bringTextIntoView() {
5498        int line = 0;
5499        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5500            line = mLayout.getLineCount() - 1;
5501        }
5502
5503        Layout.Alignment a = mLayout.getParagraphAlignment(line);
5504        int dir = mLayout.getParagraphDirection(line);
5505        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5506        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5507        int ht = mLayout.getHeight();
5508
5509        int scrollx, scrolly;
5510
5511        if (a == Layout.Alignment.ALIGN_CENTER) {
5512            /*
5513             * Keep centered if possible, or, if it is too wide to fit,
5514             * keep leading edge in view.
5515             */
5516
5517            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5518            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5519
5520            if (right - left < hspace) {
5521                scrollx = (right + left) / 2 - hspace / 2;
5522            } else {
5523                if (dir < 0) {
5524                    scrollx = right - hspace;
5525                } else {
5526                    scrollx = left;
5527                }
5528            }
5529        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
5530            /*
5531             * Keep leading edge in view.
5532             */
5533
5534            if (dir < 0) {
5535                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5536                scrollx = right - hspace;
5537            } else {
5538                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5539            }
5540        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
5541            /*
5542             * Keep trailing edge in view.
5543             */
5544
5545            if (dir < 0) {
5546                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5547            } else {
5548                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5549                scrollx = right - hspace;
5550            }
5551        }
5552
5553        if (ht < vspace) {
5554            scrolly = 0;
5555        } else {
5556            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5557                scrolly = ht - vspace;
5558            } else {
5559                scrolly = 0;
5560            }
5561        }
5562
5563        if (scrollx != mScrollX || scrolly != mScrollY) {
5564            scrollTo(scrollx, scrolly);
5565            return true;
5566        } else {
5567            return false;
5568        }
5569    }
5570
5571    /**
5572     * Move the point, specified by the offset, into the view if it is needed.
5573     * This has to be called after layout. Returns true if anything changed.
5574     */
5575    public boolean bringPointIntoView(int offset) {
5576        boolean changed = false;
5577
5578        int line = mLayout.getLineForOffset(offset);
5579
5580        // FIXME: Is it okay to truncate this, or should we round?
5581        final int x = (int)mLayout.getPrimaryHorizontal(offset);
5582        final int top = mLayout.getLineTop(line);
5583        final int bottom = mLayout.getLineTop(line + 1);
5584
5585        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5586        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5587        int ht = mLayout.getHeight();
5588
5589        int grav;
5590
5591        switch (mLayout.getParagraphAlignment(line)) {
5592            case ALIGN_NORMAL:
5593                grav = 1;
5594                break;
5595
5596            case ALIGN_OPPOSITE:
5597                grav = -1;
5598                break;
5599
5600            default:
5601                grav = 0;
5602        }
5603
5604        grav *= mLayout.getParagraphDirection(line);
5605
5606        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5607        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5608
5609        int hslack = (bottom - top) / 2;
5610        int vslack = hslack;
5611
5612        if (vslack > vspace / 4)
5613            vslack = vspace / 4;
5614        if (hslack > hspace / 4)
5615            hslack = hspace / 4;
5616
5617        int hs = mScrollX;
5618        int vs = mScrollY;
5619
5620        if (top - vs < vslack)
5621            vs = top - vslack;
5622        if (bottom - vs > vspace - vslack)
5623            vs = bottom - (vspace - vslack);
5624        if (ht - vs < vspace)
5625            vs = ht - vspace;
5626        if (0 - vs > 0)
5627            vs = 0;
5628
5629        if (grav != 0) {
5630            if (x - hs < hslack) {
5631                hs = x - hslack;
5632            }
5633            if (x - hs > hspace - hslack) {
5634                hs = x - (hspace - hslack);
5635            }
5636        }
5637
5638        if (grav < 0) {
5639            if (left - hs > 0)
5640                hs = left;
5641            if (right - hs < hspace)
5642                hs = right - hspace;
5643        } else if (grav > 0) {
5644            if (right - hs < hspace)
5645                hs = right - hspace;
5646            if (left - hs > 0)
5647                hs = left;
5648        } else /* grav == 0 */ {
5649            if (right - left <= hspace) {
5650                /*
5651                 * If the entire text fits, center it exactly.
5652                 */
5653                hs = left - (hspace - (right - left)) / 2;
5654            } else if (x > right - hslack) {
5655                /*
5656                 * If we are near the right edge, keep the right edge
5657                 * at the edge of the view.
5658                 */
5659                hs = right - hspace;
5660            } else if (x < left + hslack) {
5661                /*
5662                 * If we are near the left edge, keep the left edge
5663                 * at the edge of the view.
5664                 */
5665                hs = left;
5666            } else if (left > hs) {
5667                /*
5668                 * Is there whitespace visible at the left?  Fix it if so.
5669                 */
5670                hs = left;
5671            } else if (right < hs + hspace) {
5672                /*
5673                 * Is there whitespace visible at the right?  Fix it if so.
5674                 */
5675                hs = right - hspace;
5676            } else {
5677                /*
5678                 * Otherwise, float as needed.
5679                 */
5680                if (x - hs < hslack) {
5681                    hs = x - hslack;
5682                }
5683                if (x - hs > hspace - hslack) {
5684                    hs = x - (hspace - hslack);
5685                }
5686            }
5687        }
5688
5689        if (hs != mScrollX || vs != mScrollY) {
5690            if (mScroller == null) {
5691                scrollTo(hs, vs);
5692            } else {
5693                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
5694                int dx = hs - mScrollX;
5695                int dy = vs - mScrollY;
5696
5697                if (duration > ANIMATED_SCROLL_GAP) {
5698                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
5699                    awakenScrollBars(mScroller.getDuration());
5700                    invalidate();
5701                } else {
5702                    if (!mScroller.isFinished()) {
5703                        mScroller.abortAnimation();
5704                    }
5705
5706                    scrollBy(dx, dy);
5707                }
5708
5709                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
5710            }
5711
5712            changed = true;
5713        }
5714
5715        if (isFocused()) {
5716            // This offsets because getInterestingRect() is in terms of
5717            // viewport coordinates, but requestRectangleOnScreen()
5718            // is in terms of content coordinates.
5719
5720            Rect r = new Rect(x, top, x + 1, bottom);
5721            getInterestingRect(r, line);
5722            r.offset(mScrollX, mScrollY);
5723
5724            if (requestRectangleOnScreen(r)) {
5725                changed = true;
5726            }
5727        }
5728
5729        return changed;
5730    }
5731
5732    /**
5733     * Move the cursor, if needed, so that it is at an offset that is visible
5734     * to the user.  This will not move the cursor if it represents more than
5735     * one character (a selection range).  This will only work if the
5736     * TextView contains spannable text; otherwise it will do nothing.
5737     *
5738     * @return True if the cursor was actually moved, false otherwise.
5739     */
5740    public boolean moveCursorToVisibleOffset() {
5741        if (!(mText instanceof Spannable)) {
5742            return false;
5743        }
5744        int start = getSelectionStart();
5745        int end = getSelectionEnd();
5746        if (start != end) {
5747            return false;
5748        }
5749
5750        // First: make sure the line is visible on screen:
5751
5752        int line = mLayout.getLineForOffset(start);
5753
5754        final int top = mLayout.getLineTop(line);
5755        final int bottom = mLayout.getLineTop(line + 1);
5756        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5757        int vslack = (bottom - top) / 2;
5758        if (vslack > vspace / 4)
5759            vslack = vspace / 4;
5760        final int vs = mScrollY;
5761
5762        if (top < (vs+vslack)) {
5763            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
5764        } else if (bottom > (vspace+vs-vslack)) {
5765            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
5766        }
5767
5768        // Next: make sure the character is visible on screen:
5769
5770        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5771        final int hs = mScrollX;
5772        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
5773        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
5774
5775        int newStart = start;
5776        if (newStart < leftChar) {
5777            newStart = leftChar;
5778        } else if (newStart > rightChar) {
5779            newStart = rightChar;
5780        }
5781
5782        if (newStart != start) {
5783            Selection.setSelection((Spannable)mText, newStart);
5784            return true;
5785        }
5786
5787        return false;
5788    }
5789
5790    @Override
5791    public void computeScroll() {
5792        if (mScroller != null) {
5793            if (mScroller.computeScrollOffset()) {
5794                mScrollX = mScroller.getCurrX();
5795                mScrollY = mScroller.getCurrY();
5796                postInvalidate();  // So we draw again
5797            }
5798        }
5799    }
5800
5801    private void getInterestingRect(Rect r, int line) {
5802        convertFromViewportToContentCoordinates(r);
5803
5804        // Rectangle can can be expanded on first and last line to take
5805        // padding into account.
5806        // TODO Take left/right padding into account too?
5807        if (line == 0) r.top -= getExtendedPaddingTop();
5808        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
5809    }
5810
5811    private void convertFromViewportToContentCoordinates(Rect r) {
5812        final int horizontalOffset = viewportToContentHorizontalOffset();
5813        r.left += horizontalOffset;
5814        r.right += horizontalOffset;
5815
5816        final int verticalOffset = viewportToContentVerticalOffset();
5817        r.top += verticalOffset;
5818        r.bottom += verticalOffset;
5819    }
5820
5821    private int viewportToContentHorizontalOffset() {
5822        return getCompoundPaddingLeft() - mScrollX;
5823    }
5824
5825    private int viewportToContentVerticalOffset() {
5826        int offset = getExtendedPaddingTop() - mScrollY;
5827        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5828            offset += getVerticalOffset(false);
5829        }
5830        return offset;
5831    }
5832
5833    @Override
5834    public void debug(int depth) {
5835        super.debug(depth);
5836
5837        String output = debugIndent(depth);
5838        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
5839                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
5840                + "} ";
5841
5842        if (mText != null) {
5843
5844            output += "mText=\"" + mText + "\" ";
5845            if (mLayout != null) {
5846                output += "mLayout width=" + mLayout.getWidth()
5847                        + " height=" + mLayout.getHeight();
5848            }
5849        } else {
5850            output += "mText=NULL";
5851        }
5852        Log.d(VIEW_LOG_TAG, output);
5853    }
5854
5855    /**
5856     * Convenience for {@link Selection#getSelectionStart}.
5857     */
5858    @ViewDebug.ExportedProperty(category = "text")
5859    public int getSelectionStart() {
5860        return Selection.getSelectionStart(getText());
5861    }
5862
5863    /**
5864     * Convenience for {@link Selection#getSelectionEnd}.
5865     */
5866    @ViewDebug.ExportedProperty(category = "text")
5867    public int getSelectionEnd() {
5868        return Selection.getSelectionEnd(getText());
5869    }
5870
5871    /**
5872     * Return true iff there is a selection inside this text view.
5873     */
5874    public boolean hasSelection() {
5875        final int selectionStart = getSelectionStart();
5876        final int selectionEnd = getSelectionEnd();
5877
5878        return selectionStart >= 0 && selectionStart != selectionEnd;
5879    }
5880
5881    /**
5882     * Sets the properties of this field (lines, horizontally scrolling,
5883     * transformation method) to be for a single-line input.
5884     *
5885     * @attr ref android.R.styleable#TextView_singleLine
5886     */
5887    public void setSingleLine() {
5888        setSingleLine(true);
5889    }
5890
5891    /**
5892     * If true, sets the properties of this field (lines, horizontally
5893     * scrolling, transformation method) to be for a single-line input;
5894     * if false, restores these to the default conditions.
5895     * Note that calling this with false restores default conditions,
5896     * not necessarily those that were in effect prior to calling
5897     * it with true.
5898     *
5899     * @attr ref android.R.styleable#TextView_singleLine
5900     */
5901    @android.view.RemotableViewMethod
5902    public void setSingleLine(boolean singleLine) {
5903        if ((mInputType&EditorInfo.TYPE_MASK_CLASS)
5904                == EditorInfo.TYPE_CLASS_TEXT) {
5905            if (singleLine) {
5906                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5907            } else {
5908                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
5909            }
5910        }
5911        applySingleLine(singleLine, true);
5912    }
5913
5914    private void applySingleLine(boolean singleLine, boolean applyTransformation) {
5915        mSingleLine = singleLine;
5916        if (singleLine) {
5917            setLines(1);
5918            setHorizontallyScrolling(true);
5919            if (applyTransformation) {
5920                setTransformationMethod(SingleLineTransformationMethod.
5921                                        getInstance());
5922            }
5923        } else {
5924            setMaxLines(Integer.MAX_VALUE);
5925            setHorizontallyScrolling(false);
5926            if (applyTransformation) {
5927                setTransformationMethod(null);
5928            }
5929        }
5930    }
5931
5932    /**
5933     * Causes words in the text that are longer than the view is wide
5934     * to be ellipsized instead of broken in the middle.  You may also
5935     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
5936     * to constrain the text to a single line.  Use <code>null</code>
5937     * to turn off ellipsizing.
5938     *
5939     * @attr ref android.R.styleable#TextView_ellipsize
5940     */
5941    public void setEllipsize(TextUtils.TruncateAt where) {
5942        mEllipsize = where;
5943
5944        if (mLayout != null) {
5945            nullLayouts();
5946            requestLayout();
5947            invalidate();
5948        }
5949    }
5950
5951    /**
5952     * Sets how many times to repeat the marquee animation. Only applied if the
5953     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
5954     *
5955     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
5956     */
5957    public void setMarqueeRepeatLimit(int marqueeLimit) {
5958        mMarqueeRepeatLimit = marqueeLimit;
5959    }
5960
5961    /**
5962     * Returns where, if anywhere, words that are longer than the view
5963     * is wide should be ellipsized.
5964     */
5965    @ViewDebug.ExportedProperty
5966    public TextUtils.TruncateAt getEllipsize() {
5967        return mEllipsize;
5968    }
5969
5970    /**
5971     * Set the TextView so that when it takes focus, all the text is
5972     * selected.
5973     *
5974     * @attr ref android.R.styleable#TextView_selectAllOnFocus
5975     */
5976    @android.view.RemotableViewMethod
5977    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
5978        mSelectAllOnFocus = selectAllOnFocus;
5979
5980        if (selectAllOnFocus && !(mText instanceof Spannable)) {
5981            setText(mText, BufferType.SPANNABLE);
5982        }
5983    }
5984
5985    /**
5986     * Set whether the cursor is visible.  The default is true.
5987     *
5988     * @attr ref android.R.styleable#TextView_cursorVisible
5989     */
5990    @android.view.RemotableViewMethod
5991    public void setCursorVisible(boolean visible) {
5992        mCursorVisible = visible;
5993        invalidate();
5994
5995        if (visible) {
5996            makeBlink();
5997        } else if (mBlink != null) {
5998            mBlink.removeCallbacks(mBlink);
5999        }
6000
6001        // InsertionPointCursorController depends on mCursorVisible
6002        prepareCursorControllers();
6003    }
6004
6005    private boolean canMarquee() {
6006        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6007        return width > 0 && mLayout.getLineWidth(0) > width;
6008    }
6009
6010    private void startMarquee() {
6011        // Do not ellipsize EditText
6012        if (mInput != null) return;
6013
6014        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6015            return;
6016        }
6017
6018        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6019                getLineCount() == 1 && canMarquee()) {
6020
6021            if (mMarquee == null) mMarquee = new Marquee(this);
6022            mMarquee.start(mMarqueeRepeatLimit);
6023        }
6024    }
6025
6026    private void stopMarquee() {
6027        if (mMarquee != null && !mMarquee.isStopped()) {
6028            mMarquee.stop();
6029        }
6030    }
6031
6032    private void startStopMarquee(boolean start) {
6033        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6034            if (start) {
6035                startMarquee();
6036            } else {
6037                stopMarquee();
6038            }
6039        }
6040    }
6041
6042    private static final class Marquee extends Handler {
6043        // TODO: Add an option to configure this
6044        private static final float MARQUEE_DELTA_MAX = 0.07f;
6045        private static final int MARQUEE_DELAY = 1200;
6046        private static final int MARQUEE_RESTART_DELAY = 1200;
6047        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6048        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6049
6050        private static final byte MARQUEE_STOPPED = 0x0;
6051        private static final byte MARQUEE_STARTING = 0x1;
6052        private static final byte MARQUEE_RUNNING = 0x2;
6053
6054        private static final int MESSAGE_START = 0x1;
6055        private static final int MESSAGE_TICK = 0x2;
6056        private static final int MESSAGE_RESTART = 0x3;
6057
6058        private final WeakReference<TextView> mView;
6059
6060        private byte mStatus = MARQUEE_STOPPED;
6061        private final float mScrollUnit;
6062        private float mMaxScroll;
6063        float mMaxFadeScroll;
6064        private float mGhostStart;
6065        private float mGhostOffset;
6066        private float mFadeStop;
6067        private int mRepeatLimit;
6068
6069        float mScroll;
6070
6071        Marquee(TextView v) {
6072            final float density = v.getContext().getResources().getDisplayMetrics().density;
6073            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6074            mView = new WeakReference<TextView>(v);
6075        }
6076
6077        @Override
6078        public void handleMessage(Message msg) {
6079            switch (msg.what) {
6080                case MESSAGE_START:
6081                    mStatus = MARQUEE_RUNNING;
6082                    tick();
6083                    break;
6084                case MESSAGE_TICK:
6085                    tick();
6086                    break;
6087                case MESSAGE_RESTART:
6088                    if (mStatus == MARQUEE_RUNNING) {
6089                        if (mRepeatLimit >= 0) {
6090                            mRepeatLimit--;
6091                        }
6092                        start(mRepeatLimit);
6093                    }
6094                    break;
6095            }
6096        }
6097
6098        void tick() {
6099            if (mStatus != MARQUEE_RUNNING) {
6100                return;
6101            }
6102
6103            removeMessages(MESSAGE_TICK);
6104
6105            final TextView textView = mView.get();
6106            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6107                mScroll += mScrollUnit;
6108                if (mScroll > mMaxScroll) {
6109                    mScroll = mMaxScroll;
6110                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6111                } else {
6112                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6113                }
6114                textView.invalidate();
6115            }
6116        }
6117
6118        void stop() {
6119            mStatus = MARQUEE_STOPPED;
6120            removeMessages(MESSAGE_START);
6121            removeMessages(MESSAGE_RESTART);
6122            removeMessages(MESSAGE_TICK);
6123            resetScroll();
6124        }
6125
6126        private void resetScroll() {
6127            mScroll = 0.0f;
6128            final TextView textView = mView.get();
6129            if (textView != null) textView.invalidate();
6130        }
6131
6132        void start(int repeatLimit) {
6133            if (repeatLimit == 0) {
6134                stop();
6135                return;
6136            }
6137            mRepeatLimit = repeatLimit;
6138            final TextView textView = mView.get();
6139            if (textView != null && textView.mLayout != null) {
6140                mStatus = MARQUEE_STARTING;
6141                mScroll = 0.0f;
6142                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6143                        textView.getCompoundPaddingRight();
6144                final float lineWidth = textView.mLayout.getLineWidth(0);
6145                final float gap = textWidth / 3.0f;
6146                mGhostStart = lineWidth - textWidth + gap;
6147                mMaxScroll = mGhostStart + textWidth;
6148                mGhostOffset = lineWidth + gap;
6149                mFadeStop = lineWidth + textWidth / 6.0f;
6150                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6151
6152                textView.invalidate();
6153                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6154            }
6155        }
6156
6157        float getGhostOffset() {
6158            return mGhostOffset;
6159        }
6160
6161        boolean shouldDrawLeftFade() {
6162            return mScroll <= mFadeStop;
6163        }
6164
6165        boolean shouldDrawGhost() {
6166            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6167        }
6168
6169        boolean isRunning() {
6170            return mStatus == MARQUEE_RUNNING;
6171        }
6172
6173        boolean isStopped() {
6174            return mStatus == MARQUEE_STOPPED;
6175        }
6176    }
6177
6178    /**
6179     * This method is called when the text is changed, in case any
6180     * subclasses would like to know.
6181     *
6182     * @param text The text the TextView is displaying.
6183     * @param start The offset of the start of the range of the text
6184     *              that was modified.
6185     * @param before The offset of the former end of the range of the
6186     *               text that was modified.  If text was simply inserted,
6187     *               this will be the same as <code>start</code>.
6188     *               If text was replaced with new text or deleted, the
6189     *               length of the old text was <code>before-start</code>.
6190     * @param after The offset of the end of the range of the text
6191     *              that was modified.  If text was simply deleted,
6192     *              this will be the same as <code>start</code>.
6193     *              If text was replaced with new text or inserted,
6194     *              the length of the new text is <code>after-start</code>.
6195     */
6196    protected void onTextChanged(CharSequence text,
6197                                 int start, int before, int after) {
6198    }
6199
6200    /**
6201     * This method is called when the selection has changed, in case any
6202     * subclasses would like to know.
6203     *
6204     * @param selStart The new selection start location.
6205     * @param selEnd The new selection end location.
6206     */
6207    protected void onSelectionChanged(int selStart, int selEnd) {
6208    }
6209
6210    /**
6211     * Adds a TextWatcher to the list of those whose methods are called
6212     * whenever this TextView's text changes.
6213     * <p>
6214     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6215     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6216     * if there are any text changed listeners forces the buffer type to
6217     * Editable if it would not otherwise be and does call this method.
6218     */
6219    public void addTextChangedListener(TextWatcher watcher) {
6220        if (mListeners == null) {
6221            mListeners = new ArrayList<TextWatcher>();
6222        }
6223
6224        mListeners.add(watcher);
6225    }
6226
6227    /**
6228     * Removes the specified TextWatcher from the list of those whose
6229     * methods are called
6230     * whenever this TextView's text changes.
6231     */
6232    public void removeTextChangedListener(TextWatcher watcher) {
6233        if (mListeners != null) {
6234            int i = mListeners.indexOf(watcher);
6235
6236            if (i >= 0) {
6237                mListeners.remove(i);
6238            }
6239        }
6240    }
6241
6242    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6243                                   int after) {
6244        if (mListeners != null) {
6245            final ArrayList<TextWatcher> list = mListeners;
6246            final int count = list.size();
6247            for (int i = 0; i < count; i++) {
6248                list.get(i).beforeTextChanged(text, start, before, after);
6249            }
6250        }
6251    }
6252
6253    /**
6254     * Not private so it can be called from an inner class without going
6255     * through a thunk.
6256     */
6257    void sendOnTextChanged(CharSequence text, int start, int before,
6258                                   int after) {
6259        if (mListeners != null) {
6260            final ArrayList<TextWatcher> list = mListeners;
6261            final int count = list.size();
6262            for (int i = 0; i < count; i++) {
6263                list.get(i).onTextChanged(text, start, before, after);
6264            }
6265        }
6266    }
6267
6268    /**
6269     * Not private so it can be called from an inner class without going
6270     * through a thunk.
6271     */
6272    void sendAfterTextChanged(Editable text) {
6273        if (mListeners != null) {
6274            final ArrayList<TextWatcher> list = mListeners;
6275            final int count = list.size();
6276            for (int i = 0; i < count; i++) {
6277                list.get(i).afterTextChanged(text);
6278            }
6279        }
6280    }
6281
6282    /**
6283     * Not private so it can be called from an inner class without going
6284     * through a thunk.
6285     */
6286    void handleTextChanged(CharSequence buffer, int start,
6287            int before, int after) {
6288        final InputMethodState ims = mInputMethodState;
6289        if (ims == null || ims.mBatchEditNesting == 0) {
6290            updateAfterEdit();
6291        }
6292        if (ims != null) {
6293            ims.mContentChanged = true;
6294            if (ims.mChangedStart < 0) {
6295                ims.mChangedStart = start;
6296                ims.mChangedEnd = start+before;
6297            } else {
6298                if (ims.mChangedStart > start) ims.mChangedStart = start;
6299                if (ims.mChangedEnd < (start+before)) ims.mChangedEnd = start+before;
6300            }
6301            ims.mChangedDelta += after-before;
6302        }
6303
6304        sendOnTextChanged(buffer, start, before, after);
6305        onTextChanged(buffer, start, before, after);
6306
6307        // Hide the controller if the amount of content changed
6308        if (before != after) {
6309            hideControllers();
6310        }
6311    }
6312
6313    /**
6314     * Not private so it can be called from an inner class without going
6315     * through a thunk.
6316     */
6317    void spanChange(Spanned buf, Object what, int oldStart, int newStart,
6318            int oldEnd, int newEnd) {
6319        // XXX Make the start and end move together if this ends up
6320        // spending too much time invalidating.
6321
6322        boolean selChanged = false;
6323        int newSelStart=-1, newSelEnd=-1;
6324
6325        final InputMethodState ims = mInputMethodState;
6326
6327        if (what == Selection.SELECTION_END) {
6328            mHighlightPathBogus = true;
6329            selChanged = true;
6330            newSelEnd = newStart;
6331
6332            if (!isFocused()) {
6333                mSelectionMoved = true;
6334            }
6335
6336            if (oldStart >= 0 || newStart >= 0) {
6337                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6338                registerForPreDraw();
6339
6340                if (isFocused()) {
6341                    mShowCursor = SystemClock.uptimeMillis();
6342                    makeBlink();
6343                }
6344            }
6345        }
6346
6347        if (what == Selection.SELECTION_START) {
6348            mHighlightPathBogus = true;
6349            selChanged = true;
6350            newSelStart = newStart;
6351
6352            if (!isFocused()) {
6353                mSelectionMoved = true;
6354            }
6355
6356            if (oldStart >= 0 || newStart >= 0) {
6357                int end = Selection.getSelectionEnd(buf);
6358                invalidateCursor(end, oldStart, newStart);
6359            }
6360        }
6361
6362        if (selChanged) {
6363            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6364                if (newSelStart < 0) {
6365                    newSelStart = Selection.getSelectionStart(buf);
6366                }
6367                if (newSelEnd < 0) {
6368                    newSelEnd = Selection.getSelectionEnd(buf);
6369                }
6370                onSelectionChanged(newSelStart, newSelEnd);
6371            }
6372        }
6373
6374        if (what instanceof UpdateAppearance ||
6375            what instanceof ParagraphStyle) {
6376            if (ims == null || ims.mBatchEditNesting == 0) {
6377                invalidate();
6378                mHighlightPathBogus = true;
6379                checkForResize();
6380            } else {
6381                ims.mContentChanged = true;
6382            }
6383        }
6384
6385        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6386            mHighlightPathBogus = true;
6387            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6388                ims.mSelectionModeChanged = true;
6389            }
6390
6391            if (Selection.getSelectionStart(buf) >= 0) {
6392                if (ims == null || ims.mBatchEditNesting == 0) {
6393                    invalidateCursor();
6394                } else {
6395                    ims.mCursorChanged = true;
6396                }
6397            }
6398        }
6399
6400        if (what instanceof ParcelableSpan) {
6401            // If this is a span that can be sent to a remote process,
6402            // the current extract editor would be interested in it.
6403            if (ims != null && ims.mExtracting != null) {
6404                if (ims.mBatchEditNesting != 0) {
6405                    if (oldStart >= 0) {
6406                        if (ims.mChangedStart > oldStart) {
6407                            ims.mChangedStart = oldStart;
6408                        }
6409                        if (ims.mChangedStart > oldEnd) {
6410                            ims.mChangedStart = oldEnd;
6411                        }
6412                    }
6413                    if (newStart >= 0) {
6414                        if (ims.mChangedStart > newStart) {
6415                            ims.mChangedStart = newStart;
6416                        }
6417                        if (ims.mChangedStart > newEnd) {
6418                            ims.mChangedStart = newEnd;
6419                        }
6420                    }
6421                } else {
6422                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6423                            + oldStart + "-" + oldEnd + ","
6424                            + newStart + "-" + newEnd + what);
6425                    ims.mContentChanged = true;
6426                }
6427            }
6428        }
6429    }
6430
6431    private class ChangeWatcher
6432    implements TextWatcher, SpanWatcher {
6433
6434        private CharSequence mBeforeText;
6435
6436        public void beforeTextChanged(CharSequence buffer, int start,
6437                                      int before, int after) {
6438            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6439                    + " before=" + before + " after=" + after + ": " + buffer);
6440
6441            if (AccessibilityManager.getInstance(mContext).isEnabled()
6442                    && !isPasswordInputType(mInputType)) {
6443                mBeforeText = buffer.toString();
6444            }
6445
6446            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6447        }
6448
6449        public void onTextChanged(CharSequence buffer, int start,
6450                                  int before, int after) {
6451            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6452                    + " before=" + before + " after=" + after + ": " + buffer);
6453            TextView.this.handleTextChanged(buffer, start, before, after);
6454
6455            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6456                    (isFocused() || isSelected() &&
6457                    isShown())) {
6458                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6459                mBeforeText = null;
6460            }
6461        }
6462
6463        public void afterTextChanged(Editable buffer) {
6464            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6465            TextView.this.sendAfterTextChanged(buffer);
6466
6467            if (MetaKeyKeyListener.getMetaState(buffer,
6468                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6469                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6470            }
6471        }
6472
6473        public void onSpanChanged(Spannable buf,
6474                                  Object what, int s, int e, int st, int en) {
6475            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6476                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6477            TextView.this.spanChange(buf, what, s, st, e, en);
6478        }
6479
6480        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6481            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6482                    + " what=" + what + ": " + buf);
6483            TextView.this.spanChange(buf, what, -1, s, -1, e);
6484        }
6485
6486        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
6487            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
6488                    + " what=" + what + ": " + buf);
6489            TextView.this.spanChange(buf, what, s, -1, e, -1);
6490        }
6491    }
6492
6493    private void makeBlink() {
6494        if (!mCursorVisible) {
6495            if (mBlink != null) {
6496                mBlink.removeCallbacks(mBlink);
6497            }
6498
6499            return;
6500        }
6501
6502        if (mBlink == null)
6503            mBlink = new Blink(this);
6504
6505        mBlink.removeCallbacks(mBlink);
6506        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
6507    }
6508
6509    /**
6510     * @hide
6511     */
6512    @Override
6513    public void dispatchFinishTemporaryDetach() {
6514        mDispatchTemporaryDetach = true;
6515        super.dispatchFinishTemporaryDetach();
6516        mDispatchTemporaryDetach = false;
6517    }
6518
6519    @Override
6520    public void onStartTemporaryDetach() {
6521        super.onStartTemporaryDetach();
6522        // Only track when onStartTemporaryDetach() is called directly,
6523        // usually because this instance is an editable field in a list
6524        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
6525    }
6526
6527    @Override
6528    public void onFinishTemporaryDetach() {
6529        super.onFinishTemporaryDetach();
6530        // Only track when onStartTemporaryDetach() is called directly,
6531        // usually because this instance is an editable field in a list
6532        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
6533    }
6534
6535    @Override
6536    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
6537        if (mTemporaryDetach) {
6538            // If we are temporarily in the detach state, then do nothing.
6539            super.onFocusChanged(focused, direction, previouslyFocusedRect);
6540            return;
6541        }
6542
6543        mShowCursor = SystemClock.uptimeMillis();
6544
6545        ensureEndedBatchEdit();
6546
6547        if (focused) {
6548            int selStart = getSelectionStart();
6549            int selEnd = getSelectionEnd();
6550
6551            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
6552                // If a tap was used to give focus to that view, move cursor at tap position.
6553                // Has to be done before onTakeFocus, which can be overloaded.
6554                moveCursorToLastTapPosition();
6555
6556                if (mMovement != null) {
6557                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
6558                }
6559
6560                if (mSelectAllOnFocus) {
6561                    Selection.setSelection((Spannable) mText, 0, mText.length());
6562                }
6563
6564                // The DecorView does not have focus when the 'Done' ExtractEditText button is
6565                // pressed. Since it is the ViewRoot's mView, it requests focus before
6566                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
6567                // This special case ensure that we keep current selection in that case.
6568                // It would be better to know why the DecorView does not have focus at that time.
6569                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
6570                        selStart >= 0 && selEnd >= 0) {
6571                    /*
6572                     * Someone intentionally set the selection, so let them
6573                     * do whatever it is that they wanted to do instead of
6574                     * the default on-focus behavior.  We reset the selection
6575                     * here instead of just skipping the onTakeFocus() call
6576                     * because some movement methods do something other than
6577                     * just setting the selection in theirs and we still
6578                     * need to go through that path.
6579                     */
6580                    Selection.setSelection((Spannable) mText, selStart, selEnd);
6581                }
6582                mTouchFocusSelected = true;
6583            }
6584
6585            mFrozenWithFocus = false;
6586            mSelectionMoved = false;
6587
6588            if (mText instanceof Spannable) {
6589                Spannable sp = (Spannable) mText;
6590                MetaKeyKeyListener.resetMetaState(sp);
6591            }
6592
6593            makeBlink();
6594
6595            if (mError != null) {
6596                showError();
6597            }
6598        } else {
6599            if (mError != null) {
6600                hideError();
6601            }
6602            // Don't leave us in the middle of a batch edit.
6603            onEndBatchEdit();
6604
6605            hideInsertionPointCursorController();
6606            if (this instanceof ExtractEditText) {
6607                // terminateTextSelectionMode would remove selection, which we want to keep when
6608                // ExtractEditText goes out of focus.
6609                mIsInTextSelectionMode = false;
6610            } else {
6611                terminateTextSelectionMode();
6612            }
6613        }
6614
6615        startStopMarquee(focused);
6616
6617        if (mTransformation != null) {
6618            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
6619        }
6620
6621        super.onFocusChanged(focused, direction, previouslyFocusedRect);
6622    }
6623
6624    private void moveCursorToLastTapPosition() {
6625        if (mSelectionModifierCursorController != null) {
6626            int mTapToFocusPosition = ((SelectionModifierCursorController)
6627                    mSelectionModifierCursorController).getMinTouchOffset();
6628            if (mTapToFocusPosition >= 0) {
6629                // Safety check, should not be possible.
6630                if (mTapToFocusPosition > mText.length()) {
6631                    Log.e(LOG_TAG, "Invalid tap focus position (" + mTapToFocusPosition + " vs "
6632                            + mText.length() + ")");
6633                    mTapToFocusPosition = mText.length();
6634                }
6635                Selection.setSelection((Spannable) mText, mTapToFocusPosition);
6636            }
6637        }
6638    }
6639
6640    @Override
6641    public void onWindowFocusChanged(boolean hasWindowFocus) {
6642        super.onWindowFocusChanged(hasWindowFocus);
6643
6644        if (hasWindowFocus) {
6645            if (mBlink != null) {
6646                mBlink.uncancel();
6647
6648                if (isFocused()) {
6649                    mShowCursor = SystemClock.uptimeMillis();
6650                    makeBlink();
6651                }
6652            }
6653        } else {
6654            if (mBlink != null) {
6655                mBlink.cancel();
6656            }
6657            // Don't leave us in the middle of a batch edit.
6658            onEndBatchEdit();
6659            if (mInputContentType != null) {
6660                mInputContentType.enterDown = false;
6661            }
6662            hideInsertionPointCursorController();
6663            if (mSelectionModifierCursorController != null) {
6664                mSelectionModifierCursorController.hide();
6665            }
6666        }
6667
6668        startStopMarquee(hasWindowFocus);
6669    }
6670
6671    @Override
6672    protected void onVisibilityChanged(View changedView, int visibility) {
6673        super.onVisibilityChanged(changedView, visibility);
6674        if (visibility != VISIBLE) {
6675            hideInsertionPointCursorController();
6676            if (mSelectionModifierCursorController != null) {
6677                mSelectionModifierCursorController.hide();
6678            }
6679        }
6680    }
6681
6682    /**
6683     * Use {@link BaseInputConnection#removeComposingSpans
6684     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
6685     * state from this text view.
6686     */
6687    public void clearComposingText() {
6688        if (mText instanceof Spannable) {
6689            BaseInputConnection.removeComposingSpans((Spannable)mText);
6690        }
6691    }
6692
6693    @Override
6694    public void setSelected(boolean selected) {
6695        boolean wasSelected = isSelected();
6696
6697        super.setSelected(selected);
6698
6699        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6700            if (selected) {
6701                startMarquee();
6702            } else {
6703                stopMarquee();
6704            }
6705        }
6706    }
6707
6708    private void onTapUpEvent(int prevStart, int prevEnd) {
6709        final int start = getSelectionStart();
6710        final int end = getSelectionEnd();
6711
6712        if (start == end) {
6713            if (start >= prevStart && start < prevEnd) {
6714                // Restore previous selection
6715                Selection.setSelection((Spannable)mText, prevStart, prevEnd);
6716
6717                if (mSelectionModifierCursorController != null &&
6718                        !mSelectionModifierCursorController.isShowing()) {
6719                    // If the anchors aren't showing, revive them.
6720                    mSelectionModifierCursorController.show();
6721                } else {
6722                    // Tapping inside the selection displays the cut/copy/paste context menu
6723                    // as long as the anchors are already showing.
6724                    showContextMenu();
6725                }
6726                return;
6727            } else {
6728                // Tapping outside stops selection mode, if any
6729                stopTextSelectionMode();
6730
6731                if (mInsertionPointCursorController != null && mText.length() > 0) {
6732                    mInsertionPointCursorController.show();
6733                }
6734            }
6735        } else if (hasSelection() && mSelectionModifierCursorController != null) {
6736            mSelectionModifierCursorController.show();
6737        }
6738    }
6739
6740    class CommitSelectionReceiver extends ResultReceiver {
6741        private final int mPrevStart, mPrevEnd;
6742
6743        public CommitSelectionReceiver(int prevStart, int prevEnd) {
6744            super(getHandler());
6745            mPrevStart = prevStart;
6746            mPrevEnd = prevEnd;
6747        }
6748
6749        @Override
6750        protected void onReceiveResult(int resultCode, Bundle resultData) {
6751            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
6752            // by restoring its previous position.
6753            if (resultCode == InputMethodManager.RESULT_SHOWN) {
6754                final int len = mText.length();
6755                int start = Math.min(len, mPrevStart);
6756                int end = Math.min(len, mPrevEnd);
6757                Selection.setSelection((Spannable)mText, start, end);
6758
6759                if (hasSelection()) {
6760                    startTextSelectionMode();
6761                }
6762            }
6763        }
6764    }
6765
6766    @Override
6767    public boolean onTouchEvent(MotionEvent event) {
6768        final int action = event.getActionMasked();
6769        if (action == MotionEvent.ACTION_DOWN) {
6770            if (mInsertionPointCursorController != null) {
6771                mInsertionPointCursorController.onTouchEvent(event);
6772            }
6773            if (mSelectionModifierCursorController != null) {
6774                mSelectionModifierCursorController.onTouchEvent(event);
6775            }
6776
6777            // Reset this state; it will be re-set if super.onTouchEvent
6778            // causes focus to move to the view.
6779            mTouchFocusSelected = false;
6780            mScrolled = false;
6781        }
6782
6783        final boolean superResult = super.onTouchEvent(event);
6784
6785        /*
6786         * Don't handle the release after a long press, because it will
6787         * move the selection away from whatever the menu action was
6788         * trying to affect.
6789         */
6790        if (mEatTouchRelease && action == MotionEvent.ACTION_UP) {
6791            mEatTouchRelease = false;
6792            return superResult;
6793        }
6794
6795        if ((mMovement != null || onCheckIsTextEditor()) && mText instanceof Spannable && mLayout != null) {
6796            if (mInsertionPointCursorController != null) {
6797                mInsertionPointCursorController.onTouchEvent(event);
6798            }
6799            if (mSelectionModifierCursorController != null) {
6800                mSelectionModifierCursorController.onTouchEvent(event);
6801            }
6802
6803            boolean handled = false;
6804
6805            // Save previous selection, in case this event is used to show the IME.
6806            int oldSelStart = getSelectionStart();
6807            int oldSelEnd = getSelectionEnd();
6808
6809            final int oldScrollX = mScrollX;
6810            final int oldScrollY = mScrollY;
6811
6812            if (mMovement != null) {
6813                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
6814            }
6815
6816            if (isTextEditable()) {
6817                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
6818                    // Hide insertion anchor while scrolling. Leave selection.
6819                    hideInsertionPointCursorController();
6820                    if (mSelectionModifierCursorController != null &&
6821                            mSelectionModifierCursorController.isShowing()) {
6822                        mSelectionModifierCursorController.updatePosition();
6823                    }
6824                }
6825                if (action == MotionEvent.ACTION_UP && isFocused() && !mScrolled) {
6826                    InputMethodManager imm = (InputMethodManager)
6827                          getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
6828
6829                    CommitSelectionReceiver csr = null;
6830                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
6831                            didTouchFocusSelect()) {
6832                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
6833                    }
6834
6835                    handled |= imm.showSoftInput(this, 0, csr) && (csr != null);
6836
6837                    // Cannot be done by CommitSelectionReceiver, which might not always be called,
6838                    // for instance when dealing with an ExtractEditText.
6839                    onTapUpEvent(oldSelStart, oldSelEnd);
6840                }
6841            }
6842
6843            if (handled) {
6844                return true;
6845            }
6846        }
6847
6848        return superResult;
6849    }
6850
6851    private void prepareCursorControllers() {
6852        // TODO Add an extra android:cursorController flag to disable the controller?
6853        if (mCursorVisible && mLayout != null) {
6854            if (mInsertionPointCursorController == null) {
6855                mInsertionPointCursorController = new InsertionPointCursorController();
6856            }
6857        } else {
6858            mInsertionPointCursorController = null;
6859        }
6860
6861        if (textCanBeSelected() && mLayout != null) {
6862            if (mSelectionModifierCursorController == null) {
6863                mSelectionModifierCursorController = new SelectionModifierCursorController();
6864            }
6865        } else {
6866            // Stop selection mode if the controller becomes unavailable.
6867            stopTextSelectionMode();
6868            mSelectionModifierCursorController = null;
6869        }
6870    }
6871
6872    /**
6873     * @return True iff this TextView contains a text that can be edited.
6874     */
6875    private boolean isTextEditable() {
6876        return mText instanceof Editable && onCheckIsTextEditor();
6877    }
6878
6879    /**
6880     * Returns true, only while processing a touch gesture, if the initial
6881     * touch down event caused focus to move to the text view and as a result
6882     * its selection changed.  Only valid while processing the touch gesture
6883     * of interest.
6884     */
6885    public boolean didTouchFocusSelect() {
6886        return mTouchFocusSelected;
6887    }
6888
6889    @Override
6890    public void cancelLongPress() {
6891        super.cancelLongPress();
6892        mScrolled = true;
6893    }
6894
6895    @Override
6896    public boolean onTrackballEvent(MotionEvent event) {
6897        if (mMovement != null && mText instanceof Spannable &&
6898            mLayout != null) {
6899            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
6900                return true;
6901            }
6902        }
6903
6904        return super.onTrackballEvent(event);
6905    }
6906
6907    public void setScroller(Scroller s) {
6908        mScroller = s;
6909    }
6910
6911    private static class Blink extends Handler implements Runnable {
6912        private final WeakReference<TextView> mView;
6913        private boolean mCancelled;
6914
6915        public Blink(TextView v) {
6916            mView = new WeakReference<TextView>(v);
6917        }
6918
6919        public void run() {
6920            if (mCancelled) {
6921                return;
6922            }
6923
6924            removeCallbacks(Blink.this);
6925
6926            TextView tv = mView.get();
6927
6928            if (tv != null && tv.isFocused()) {
6929                int st = tv.getSelectionStart();
6930                int en = tv.getSelectionEnd();
6931
6932                if (st == en && st >= 0 && en >= 0) {
6933                    if (tv.mLayout != null) {
6934                        tv.invalidateCursorPath();
6935                    }
6936
6937                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
6938                }
6939            }
6940        }
6941
6942        void cancel() {
6943            if (!mCancelled) {
6944                removeCallbacks(Blink.this);
6945                mCancelled = true;
6946            }
6947        }
6948
6949        void uncancel() {
6950            mCancelled = false;
6951        }
6952    }
6953
6954    @Override
6955    protected float getLeftFadingEdgeStrength() {
6956        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6957            if (mMarquee != null && !mMarquee.isStopped()) {
6958                final Marquee marquee = mMarquee;
6959                if (marquee.shouldDrawLeftFade()) {
6960                    return marquee.mScroll / getHorizontalFadingEdgeLength();
6961                } else {
6962                    return 0.0f;
6963                }
6964            } else if (getLineCount() == 1) {
6965                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6966                    case Gravity.LEFT:
6967                        return 0.0f;
6968                    case Gravity.RIGHT:
6969                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
6970                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
6971                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
6972                    case Gravity.CENTER_HORIZONTAL:
6973                        return 0.0f;
6974                }
6975            }
6976        }
6977        return super.getLeftFadingEdgeStrength();
6978    }
6979
6980    @Override
6981    protected float getRightFadingEdgeStrength() {
6982        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6983            if (mMarquee != null && !mMarquee.isStopped()) {
6984                final Marquee marquee = mMarquee;
6985                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
6986            } else if (getLineCount() == 1) {
6987                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
6988                    case Gravity.LEFT:
6989                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
6990                                getCompoundPaddingRight();
6991                        final float lineWidth = mLayout.getLineWidth(0);
6992                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
6993                    case Gravity.RIGHT:
6994                        return 0.0f;
6995                    case Gravity.CENTER_HORIZONTAL:
6996                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
6997                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
6998                                getHorizontalFadingEdgeLength();
6999                }
7000            }
7001        }
7002        return super.getRightFadingEdgeStrength();
7003    }
7004
7005    @Override
7006    protected int computeHorizontalScrollRange() {
7007        if (mLayout != null)
7008            return mLayout.getWidth();
7009
7010        return super.computeHorizontalScrollRange();
7011    }
7012
7013    @Override
7014    protected int computeVerticalScrollRange() {
7015        if (mLayout != null)
7016            return mLayout.getHeight();
7017
7018        return super.computeVerticalScrollRange();
7019    }
7020
7021    @Override
7022    protected int computeVerticalScrollExtent() {
7023        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7024    }
7025
7026    public enum BufferType {
7027        NORMAL, SPANNABLE, EDITABLE,
7028    }
7029
7030    /**
7031     * Returns the TextView_textColor attribute from the
7032     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7033     * from the TextView_textAppearance attribute, if TextView_textColor
7034     * was not set directly.
7035     */
7036    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7037        ColorStateList colors;
7038        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7039                                         TextView_textColor);
7040
7041        if (colors == null) {
7042            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7043                                         TextView_textAppearance, -1);
7044            if (ap != -1) {
7045                TypedArray appearance;
7046                appearance = context.obtainStyledAttributes(ap,
7047                                            com.android.internal.R.styleable.TextAppearance);
7048                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7049                                                  TextAppearance_textColor);
7050                appearance.recycle();
7051            }
7052        }
7053
7054        return colors;
7055    }
7056
7057    /**
7058     * Returns the default color from the TextView_textColor attribute
7059     * from the AttributeSet, if set, or the default color from the
7060     * TextAppearance_textColor from the TextView_textAppearance attribute,
7061     * if TextView_textColor was not set directly.
7062     */
7063    public static int getTextColor(Context context,
7064                                   TypedArray attrs,
7065                                   int def) {
7066        ColorStateList colors = getTextColors(context, attrs);
7067
7068        if (colors == null) {
7069            return def;
7070        } else {
7071            return colors.getDefaultColor();
7072        }
7073    }
7074
7075    @Override
7076    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7077        switch (keyCode) {
7078        case KeyEvent.KEYCODE_A:
7079            if (canSelectText()) {
7080                return onTextContextMenuItem(ID_SELECT_ALL);
7081            }
7082
7083            break;
7084
7085        case KeyEvent.KEYCODE_X:
7086            if (canCut()) {
7087                return onTextContextMenuItem(ID_CUT);
7088            }
7089
7090            break;
7091
7092        case KeyEvent.KEYCODE_C:
7093            if (canCopy()) {
7094                return onTextContextMenuItem(ID_COPY);
7095            }
7096
7097            break;
7098
7099        case KeyEvent.KEYCODE_V:
7100            if (canPaste()) {
7101                return onTextContextMenuItem(ID_PASTE);
7102            }
7103
7104            break;
7105        }
7106
7107        return super.onKeyShortcut(keyCode, event);
7108    }
7109
7110    private boolean canSelectText() {
7111        return textCanBeSelected() && mText.length() != 0;
7112    }
7113
7114    private boolean textCanBeSelected() {
7115        // prepareCursorController() relies on this method.
7116        // If you change this condition, make sure prepareCursorController is called anywhere
7117        // the value of this condition might be changed.
7118        return (mText instanceof Spannable &&
7119                mMovement != null &&
7120                mMovement.canSelectArbitrarily());
7121    }
7122
7123    private boolean canCut() {
7124        if (mTransformation instanceof PasswordTransformationMethod) {
7125            return false;
7126        }
7127
7128        if (mText.length() > 0 && hasSelection()) {
7129            if (mText instanceof Editable && mInput != null) {
7130                return true;
7131            }
7132        }
7133
7134        return false;
7135    }
7136
7137    private boolean canCopy() {
7138        if (mTransformation instanceof PasswordTransformationMethod) {
7139            return false;
7140        }
7141
7142        if (mText.length() > 0 && hasSelection()) {
7143            return true;
7144        }
7145
7146        return false;
7147    }
7148
7149    private boolean canPaste() {
7150        return (mText instanceof Editable &&
7151                mInput != null &&
7152                getSelectionStart() >= 0 &&
7153                getSelectionEnd() >= 0 &&
7154                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7155                hasText());
7156    }
7157
7158    /**
7159     * Returns the offsets delimiting the 'word' located at position offset.
7160     *
7161     * @param offset An offset in the text.
7162     * @return The offsets for the start and end of the word located at <code>offset</code>.
7163     * The two ints offsets are packed in a long, with the starting offset shifted by 32 bits.
7164     * Returns a negative value if no valid word was found.
7165     */
7166    private long getWordLimitsAt(int offset) {
7167        /*
7168         * Quick return if the input type is one where adding words
7169         * to the dictionary doesn't make any sense.
7170         */
7171        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7172        if (klass == InputType.TYPE_CLASS_NUMBER ||
7173            klass == InputType.TYPE_CLASS_PHONE ||
7174            klass == InputType.TYPE_CLASS_DATETIME) {
7175            return -1;
7176        }
7177
7178        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7179        if (variation == InputType.TYPE_TEXT_VARIATION_URI ||
7180            variation == InputType.TYPE_TEXT_VARIATION_PASSWORD ||
7181            variation == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD ||
7182            variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7183            variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7184            return -1;
7185        }
7186
7187        int len = mText.length();
7188        int end = Math.min(offset, len);
7189
7190        if (end < 0) {
7191            return -1;
7192        }
7193
7194        int start = end;
7195
7196        for (; start > 0; start--) {
7197            char c = mTransformed.charAt(start - 1);
7198            int type = Character.getType(c);
7199
7200            if (c != '\'' &&
7201                type != Character.UPPERCASE_LETTER &&
7202                type != Character.LOWERCASE_LETTER &&
7203                type != Character.TITLECASE_LETTER &&
7204                type != Character.MODIFIER_LETTER &&
7205                type != Character.DECIMAL_DIGIT_NUMBER) {
7206                break;
7207            }
7208        }
7209
7210        for (; end < len; end++) {
7211            char c = mTransformed.charAt(end);
7212            int type = Character.getType(c);
7213
7214            if (c != '\'' &&
7215                type != Character.UPPERCASE_LETTER &&
7216                type != Character.LOWERCASE_LETTER &&
7217                type != Character.TITLECASE_LETTER &&
7218                type != Character.MODIFIER_LETTER &&
7219                type != Character.DECIMAL_DIGIT_NUMBER) {
7220                break;
7221            }
7222        }
7223
7224        if (start == end) {
7225            return -1;
7226        }
7227
7228        if (end - start > 48) {
7229            return -1;
7230        }
7231
7232        boolean hasLetter = false;
7233        for (int i = start; i < end; i++) {
7234            if (Character.isLetter(mTransformed.charAt(i))) {
7235                hasLetter = true;
7236                break;
7237            }
7238        }
7239
7240        if (!hasLetter) {
7241            return -1;
7242        }
7243
7244        // Two ints packed in a long
7245        return packRangeInLong(start, end);
7246    }
7247
7248    private static long packRangeInLong(int start, int end) {
7249        return (((long) start) << 32) | end;
7250    }
7251
7252    private static int extractRangeStartFromLong(long range) {
7253        return (int) (range >>> 32);
7254    }
7255
7256    private static int extractRangeEndFromLong(long range) {
7257        return (int) (range & 0x00000000FFFFFFFFL);
7258    }
7259
7260    private void selectCurrentWord() {
7261        // In case selection mode is started after an orientation change or after a select all,
7262        // use the current selection instead of creating one
7263        if (hasSelection()) {
7264            return;
7265        }
7266
7267        int minOffset, maxOffset;
7268
7269        if (mContextMenuTriggeredByKey) {
7270            minOffset = getSelectionStart();
7271            maxOffset = getSelectionEnd();
7272        } else {
7273            // selectionModifierCursorController is not null at that point
7274            SelectionModifierCursorController selectionModifierCursorController =
7275                ((SelectionModifierCursorController) mSelectionModifierCursorController);
7276            minOffset = selectionModifierCursorController.getMinTouchOffset();
7277            maxOffset = selectionModifierCursorController.getMaxTouchOffset();
7278        }
7279
7280        int selectionStart, selectionEnd;
7281
7282        long wordLimits = getWordLimitsAt(minOffset);
7283        if (wordLimits >= 0) {
7284            selectionStart = extractRangeStartFromLong(wordLimits);
7285        } else {
7286            selectionStart = Math.max(minOffset - 5, 0);
7287        }
7288
7289        wordLimits = getWordLimitsAt(maxOffset);
7290        if (wordLimits >= 0) {
7291            selectionEnd = extractRangeEndFromLong(wordLimits);
7292        } else {
7293            selectionEnd = Math.min(maxOffset + 5, mText.length());
7294        }
7295
7296        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7297    }
7298
7299    private String getWordForDictionary() {
7300        if (!mContextMenuTriggeredByKey) {
7301            moveCursorToLastTapPosition();
7302        }
7303        long wordLimits = getWordLimitsAt(getSelectionStart());
7304        if (wordLimits >= 0) {
7305            int start = extractRangeStartFromLong(wordLimits);
7306            int end = extractRangeEndFromLong(wordLimits);
7307            return mTransformed.subSequence(start, end).toString();
7308        } else {
7309            return null;
7310        }
7311    }
7312
7313    @Override
7314    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7315        if (!isShown()) {
7316            return false;
7317        }
7318
7319        final boolean isPassword = isPasswordInputType(mInputType);
7320
7321        if (!isPassword) {
7322            CharSequence text = getText();
7323            if (TextUtils.isEmpty(text)) {
7324                text = getHint();
7325            }
7326            if (!TextUtils.isEmpty(text)) {
7327                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7328                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7329                }
7330                event.getText().add(text);
7331            }
7332        } else {
7333            event.setPassword(isPassword);
7334        }
7335        return false;
7336    }
7337
7338    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7339            int fromIndex, int removedCount, int addedCount) {
7340        AccessibilityEvent event =
7341            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7342        event.setFromIndex(fromIndex);
7343        event.setRemovedCount(removedCount);
7344        event.setAddedCount(addedCount);
7345        event.setBeforeText(beforeText);
7346        sendAccessibilityEventUnchecked(event);
7347    }
7348
7349    @Override
7350    protected void onCreateContextMenu(ContextMenu menu) {
7351        super.onCreateContextMenu(menu);
7352        boolean added = false;
7353        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7354        // Problem with context menu on long press: the menu appears while the key in down and when
7355        // the key is released, the view does not receive the key_up event. This ensures that the
7356        // state is reset whenever the context menu action is displayed.
7357        // mContextMenuTriggeredByKey saved that state so that it is available in
7358        // onTextContextMenuItem. We cannot simply clear these flags in onTextContextMenuItem since
7359        // it may not be called (if the user/ discards the context menu with the back key).
7360        mDPadCenterIsDown = mEnterKeyIsDown = false;
7361
7362        if (mIsInTextSelectionMode) {
7363            MenuHandler handler = new MenuHandler();
7364
7365            if (canCut()) {
7366                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
7367                     setOnMenuItemClickListener(handler).
7368                     setAlphabeticShortcut('x');
7369                added = true;
7370            }
7371
7372            if (canCopy()) {
7373                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
7374                     setOnMenuItemClickListener(handler).
7375                     setAlphabeticShortcut('c');
7376                added = true;
7377            }
7378
7379            if (canPaste()) {
7380                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7381                     setOnMenuItemClickListener(handler).
7382                     setAlphabeticShortcut('v');
7383                added = true;
7384            }
7385        } else {
7386            MenuHandler handler = new MenuHandler();
7387
7388            if (canSelectText()) {
7389                menu.add(0, ID_START_SELECTING_TEXT, 0, com.android.internal.R.string.selectText).
7390                     setOnMenuItemClickListener(handler);
7391                menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
7392                     setOnMenuItemClickListener(handler).
7393                     setAlphabeticShortcut('a');
7394                added = true;
7395            }
7396
7397            if (mText instanceof Spanned) {
7398                int selStart = getSelectionStart();
7399                int selEnd = getSelectionEnd();
7400
7401                int min = Math.min(selStart, selEnd);
7402                int max = Math.max(selStart, selEnd);
7403
7404                URLSpan[] urls = ((Spanned) mText).getSpans(min, max,
7405                        URLSpan.class);
7406                if (urls.length == 1) {
7407                    menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7408                         setOnMenuItemClickListener(handler);
7409                    added = true;
7410                }
7411            }
7412
7413            if (canPaste()) {
7414                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
7415                     setOnMenuItemClickListener(handler).
7416                     setAlphabeticShortcut('v');
7417                added = true;
7418            }
7419
7420            if (isInputMethodTarget()) {
7421                menu.add(1, ID_SWITCH_INPUT_METHOD, 0, com.android.internal.R.string.inputMethod).
7422                     setOnMenuItemClickListener(handler);
7423                added = true;
7424            }
7425
7426            String word = getWordForDictionary();
7427            if (word != null) {
7428                menu.add(1, ID_ADD_TO_DICTIONARY, 0,
7429                     getContext().getString(com.android.internal.R.string.addToDictionary, word)).
7430                     setOnMenuItemClickListener(handler);
7431                added = true;
7432
7433            }
7434        }
7435
7436        if (added) {
7437            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7438        }
7439    }
7440
7441    /**
7442     * Returns whether this text view is a current input method target.  The
7443     * default implementation just checks with {@link InputMethodManager}.
7444     */
7445    public boolean isInputMethodTarget() {
7446        InputMethodManager imm = InputMethodManager.peekInstance();
7447        return imm != null && imm.isActive(this);
7448    }
7449
7450    // Context menu entries
7451    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7452    private static final int ID_START_SELECTING_TEXT = android.R.id.startSelectingText;
7453    private static final int ID_CUT = android.R.id.cut;
7454    private static final int ID_COPY = android.R.id.copy;
7455    private static final int ID_PASTE = android.R.id.paste;
7456    private static final int ID_COPY_URL = android.R.id.copyUrl;
7457    private static final int ID_SWITCH_INPUT_METHOD = android.R.id.switchInputMethod;
7458    private static final int ID_ADD_TO_DICTIONARY = android.R.id.addToDictionary;
7459
7460    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7461        public boolean onMenuItemClick(MenuItem item) {
7462            return onTextContextMenuItem(item.getItemId());
7463        }
7464    }
7465
7466    /**
7467     * Called when a context menu option for the text view is selected.  Currently
7468     * this will be one of: {@link android.R.id#selectAll},
7469     * {@link android.R.id#startSelectingText},
7470     * {@link android.R.id#cut}, {@link android.R.id#copy},
7471     * {@link android.R.id#paste}, {@link android.R.id#copyUrl},
7472     * or {@link android.R.id#switchInputMethod}.
7473     */
7474    public boolean onTextContextMenuItem(int id) {
7475        int min = 0;
7476        int max = mText.length();
7477
7478        if (isFocused()) {
7479            final int selStart = getSelectionStart();
7480            final int selEnd = getSelectionEnd();
7481
7482            min = Math.max(0, Math.min(selStart, selEnd));
7483            max = Math.max(0, Math.max(selStart, selEnd));
7484        }
7485
7486        ClipboardManager clip = (ClipboardManager)getContext()
7487                .getSystemService(Context.CLIPBOARD_SERVICE);
7488
7489        switch (id) {
7490            case ID_SELECT_ALL:
7491                Selection.setSelection((Spannable) mText, 0, mText.length());
7492                startTextSelectionMode();
7493                return true;
7494
7495            case ID_START_SELECTING_TEXT:
7496                startTextSelectionMode();
7497                return true;
7498
7499            case ID_CUT:
7500                clip.setText(mTransformed.subSequence(min, max));
7501                ((Editable) mText).delete(min, max);
7502                stopTextSelectionMode();
7503                return true;
7504
7505            case ID_COPY:
7506                clip.setText(mTransformed.subSequence(min, max));
7507                stopTextSelectionMode();
7508                return true;
7509
7510            case ID_PASTE:
7511                CharSequence paste = clip.getText();
7512
7513                if (paste != null && paste.length() > 0) {
7514                    long minMax = prepareSpacesAroundPaste(min, max, paste);
7515                    min = extractRangeStartFromLong(minMax);
7516                    max = extractRangeEndFromLong(minMax);
7517                    Selection.setSelection((Spannable) mText, max);
7518                    ((Editable) mText).replace(min, max, paste);
7519                    stopTextSelectionMode();
7520                }
7521                return true;
7522
7523            case ID_COPY_URL:
7524                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7525                if (urls.length == 1) {
7526                    clip.setText(urls[0].getURL());
7527                }
7528                return true;
7529
7530            case ID_SWITCH_INPUT_METHOD:
7531                InputMethodManager imm = InputMethodManager.peekInstance();
7532                if (imm != null) {
7533                    imm.showInputMethodPicker();
7534                }
7535                return true;
7536
7537            case ID_ADD_TO_DICTIONARY:
7538                String word = getWordForDictionary();
7539                if (word != null) {
7540                    Intent i = new Intent("com.android.settings.USER_DICTIONARY_INSERT");
7541                    i.putExtra("word", word);
7542                    i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
7543                    getContext().startActivity(i);
7544                }
7545                return true;
7546            }
7547
7548        return false;
7549    }
7550
7551    /**
7552     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
7553     * by [min, max] when replacing this region by paste.
7554     */
7555    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
7556        // Paste adds/removes spaces before or after insertion as needed.
7557        if (Character.isSpaceChar(paste.charAt(0))) {
7558            if (min > 0 && Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7559                // Two spaces at beginning of paste: remove one
7560                final int originalLength = mText.length();
7561                ((Editable) mText).replace(min - 1, min, "");
7562                // Due to filters, there is no garantee that exactly one character was
7563                // removed. Count instead.
7564                final int delta = mText.length() - originalLength;
7565                min += delta;
7566                max += delta;
7567            }
7568        } else {
7569            if (min > 0 && !Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7570                // No space at beginning of paste: add one
7571                final int originalLength = mText.length();
7572                ((Editable) mText).replace(min, min, " ");
7573                // Taking possible filters into account as above.
7574                final int delta = mText.length() - originalLength;
7575                min += delta;
7576                max += delta;
7577            }
7578        }
7579
7580        if (Character.isSpaceChar(paste.charAt(paste.length() - 1))) {
7581            if (max < mText.length() && Character.isSpaceChar(mTransformed.charAt(max))) {
7582                // Two spaces at end of paste: remove one
7583                ((Editable) mText).replace(max, max + 1, "");
7584            }
7585        } else {
7586            if (max < mText.length() && !Character.isSpaceChar(mTransformed.charAt(max))) {
7587                // No space at end of paste: add one
7588                ((Editable) mText).replace(max, max, " ");
7589            }
7590        }
7591        return packRangeInLong(min, max);
7592    }
7593
7594    @Override
7595    public boolean performLongClick() {
7596        if (super.performLongClick()) {
7597            mEatTouchRelease = true;
7598            return true;
7599        }
7600
7601        return false;
7602    }
7603
7604    private void startTextSelectionMode() {
7605        if (!mIsInTextSelectionMode) {
7606            if (mSelectionModifierCursorController == null) {
7607                Log.w(LOG_TAG, "TextView has no selection controller. Action mode cancelled.");
7608                return;
7609            }
7610
7611            if (!requestFocus()) {
7612                return;
7613            }
7614
7615            selectCurrentWord();
7616            mSelectionModifierCursorController.show();
7617            mIsInTextSelectionMode = true;
7618        }
7619    }
7620
7621    /**
7622     * Same as {@link #stopTextSelectionMode()}, except that there is no cursor controller
7623     * fade out animation. Needed since the drawable and their alpha values are shared by all
7624     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
7625     * new one otherwise.
7626     */
7627    private void terminateTextSelectionMode() {
7628        stopTextSelectionMode();
7629        if (mSelectionModifierCursorController != null) {
7630            SelectionModifierCursorController selectionModifierCursorController =
7631                (SelectionModifierCursorController) mSelectionModifierCursorController;
7632            selectionModifierCursorController.cancelFadeOutAnimation();
7633        }
7634    }
7635
7636    private void stopTextSelectionMode() {
7637        if (mIsInTextSelectionMode) {
7638            Selection.setSelection((Spannable) mText, getSelectionEnd());
7639            if (mSelectionModifierCursorController != null) {
7640                mSelectionModifierCursorController.hide();
7641            }
7642
7643            mIsInTextSelectionMode = false;
7644        }
7645    }
7646
7647    /**
7648     * A CursorController instance can be used to control a cursor in the text.
7649     * It is not used outside of {@link TextView}.
7650     * @hide
7651     */
7652    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
7653        /**
7654         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
7655         * See also {@link #hide()}.
7656         */
7657        public void show();
7658
7659        /**
7660         * Hide the cursor controller from screen.
7661         * See also {@link #show()}.
7662         */
7663        public void hide();
7664
7665        /**
7666         * @return true if the CursorController is currently visible
7667         */
7668        public boolean isShowing();
7669
7670        /**
7671         * Update the controller's position.
7672         */
7673        public void updatePosition(HandleView handle, int x, int y);
7674
7675        public void updatePosition();
7676
7677        /**
7678         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
7679         * a chance to become active and/or visible.
7680         * @param event The touch event
7681         */
7682        public boolean onTouchEvent(MotionEvent event);
7683    }
7684
7685    private class HandleView extends View {
7686        private boolean mPositionOnTop = false;
7687        private Drawable mDrawable;
7688        private PopupWindow mContainer;
7689        private int mPositionX;
7690        private int mPositionY;
7691        private CursorController mController;
7692        private boolean mIsDragging;
7693        private float mTouchToWindowOffsetX;
7694        private float mTouchToWindowOffsetY;
7695        private float mHotspotX;
7696        private float mHotspotY;
7697        private int mHeight;
7698        private float mTouchOffsetY;
7699        private int mLastParentX;
7700        private int mLastParentY;
7701
7702        public static final int LEFT = 0;
7703        public static final int CENTER = 1;
7704        public static final int RIGHT = 2;
7705
7706        public HandleView(CursorController controller, int pos) {
7707            super(TextView.this.mContext);
7708            mController = controller;
7709            mContainer = new PopupWindow(TextView.this.mContext, null,
7710                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7711            mContainer.setSplitTouchEnabled(true);
7712            mContainer.setClippingEnabled(false);
7713            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
7714
7715            setOrientation(pos);
7716        }
7717
7718        public void setOrientation(int pos) {
7719            int handleWidth;
7720            switch (pos) {
7721            case LEFT: {
7722                if (mSelectHandleLeft == null) {
7723                    mSelectHandleLeft = mContext.getResources().getDrawable(
7724                            mTextSelectHandleLeftRes);
7725                }
7726                mDrawable = mSelectHandleLeft;
7727                handleWidth = mDrawable.getIntrinsicWidth();
7728                mHotspotX = handleWidth / 4 * 3;
7729                break;
7730            }
7731
7732            case RIGHT: {
7733                if (mSelectHandleRight == null) {
7734                    mSelectHandleRight = mContext.getResources().getDrawable(
7735                            mTextSelectHandleRightRes);
7736                }
7737                mDrawable = mSelectHandleRight;
7738                handleWidth = mDrawable.getIntrinsicWidth();
7739                mHotspotX = handleWidth / 4;
7740                break;
7741            }
7742
7743            case CENTER:
7744            default: {
7745                if (mSelectHandleCenter == null) {
7746                    mSelectHandleCenter = mContext.getResources().getDrawable(
7747                            mTextSelectHandleRes);
7748                }
7749                mDrawable = mSelectHandleCenter;
7750                handleWidth = mDrawable.getIntrinsicWidth();
7751                mHotspotX = handleWidth / 2;
7752                break;
7753            }
7754            }
7755
7756            final int handleHeight = mDrawable.getIntrinsicHeight();
7757
7758            mTouchOffsetY = -handleHeight * 0.3f;
7759            mHotspotY = 0;
7760            mHeight = handleHeight;
7761            invalidate();
7762        }
7763
7764        @Override
7765        public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
7766            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
7767                    mDrawable.getIntrinsicHeight());
7768        }
7769
7770        public void show() {
7771            if (!isPositionVisible()) {
7772                hide();
7773                return;
7774            }
7775            mContainer.setContentView(this);
7776            final int[] coords = mTempCoords;
7777            TextView.this.getLocationInWindow(coords);
7778            coords[0] += mPositionX;
7779            coords[1] += mPositionY;
7780            mContainer.showAtLocation(TextView.this, 0, coords[0], coords[1]);
7781        }
7782
7783        public void hide() {
7784            mIsDragging = false;
7785            mContainer.dismiss();
7786        }
7787
7788        public boolean isShowing() {
7789            return mContainer.isShowing();
7790        }
7791
7792        private boolean isPositionVisible() {
7793            // Always show a dragging handle.
7794            if (mIsDragging) {
7795                return true;
7796            }
7797
7798            final int extendedPaddingTop = getExtendedPaddingTop();
7799            final int extendedPaddingBottom = getExtendedPaddingBottom();
7800            final int compoundPaddingLeft = getCompoundPaddingLeft();
7801            final int compoundPaddingRight = getCompoundPaddingRight();
7802
7803            final TextView hostView = TextView.this;
7804            final int left = 0;
7805            final int right = hostView.getWidth();
7806            final int top = 0;
7807            final int bottom = hostView.getHeight();
7808
7809            if (mTempRect == null) {
7810                mTempRect = new Rect();
7811            }
7812            final Rect clip = mTempRect;
7813            clip.left = left + compoundPaddingLeft;
7814            clip.top = top + extendedPaddingTop;
7815            clip.right = right - compoundPaddingRight;
7816            clip.bottom = bottom - extendedPaddingBottom;
7817
7818            final ViewParent parent = hostView.getParent();
7819            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
7820                return false;
7821            }
7822
7823            final int[] coords = mTempCoords;
7824            hostView.getLocationInWindow(coords);
7825            final int posX = coords[0] + mPositionX + (int) mHotspotX;
7826            final int posY = coords[1] + mPositionY + (int) mHotspotY;
7827
7828            return posX >= clip.left && posX <= clip.right &&
7829                    posY >= clip.top && posY <= clip.bottom;
7830        }
7831
7832        private void moveTo(int x, int y) {
7833            mPositionX = x - TextView.this.mScrollX;
7834            mPositionY = y - TextView.this.mScrollY;
7835            if (isPositionVisible()) {
7836                int[] coords = null;
7837                if (mContainer.isShowing()){
7838                    coords = mTempCoords;
7839                    TextView.this.getLocationInWindow(coords);
7840                    mContainer.update(coords[0] + mPositionX, coords[1] + mPositionY,
7841                            mRight - mLeft, mBottom - mTop);
7842                } else {
7843                    show();
7844                }
7845
7846                if (mIsDragging) {
7847                    if (coords == null) {
7848                        coords = mTempCoords;
7849                        TextView.this.getLocationInWindow(coords);
7850                    }
7851                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
7852                        mTouchToWindowOffsetX += coords[0] - mLastParentX;
7853                        mTouchToWindowOffsetY += coords[1] - mLastParentY;
7854                        mLastParentX = coords[0];
7855                        mLastParentY = coords[1];
7856                    }
7857                }
7858            } else {
7859                hide();
7860            }
7861        }
7862
7863        @Override
7864        public void onDraw(Canvas c) {
7865            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
7866            if (mPositionOnTop) {
7867                c.save();
7868                c.rotate(180, (mRight - mLeft) / 2, (mBottom - mTop) / 2);
7869                mDrawable.draw(c);
7870                c.restore();
7871            } else {
7872                mDrawable.draw(c);
7873            }
7874        }
7875
7876        @Override
7877        public boolean onTouchEvent(MotionEvent ev) {
7878            switch (ev.getActionMasked()) {
7879            case MotionEvent.ACTION_DOWN: {
7880                final float rawX = ev.getRawX();
7881                final float rawY = ev.getRawY();
7882                mTouchToWindowOffsetX = rawX - mPositionX;
7883                mTouchToWindowOffsetY = rawY - mPositionY;
7884                final int[] coords = mTempCoords;
7885                TextView.this.getLocationInWindow(coords);
7886                mLastParentX = coords[0];
7887                mLastParentY = coords[1];
7888                mIsDragging = true;
7889                break;
7890            }
7891            case MotionEvent.ACTION_MOVE: {
7892                final float rawX = ev.getRawX();
7893                final float rawY = ev.getRawY();
7894                final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
7895                final float newPosY = rawY - mTouchToWindowOffsetY + mHotspotY + mTouchOffsetY;
7896
7897                mController.updatePosition(this, Math.round(newPosX), Math.round(newPosY));
7898
7899                break;
7900            }
7901            case MotionEvent.ACTION_UP:
7902            case MotionEvent.ACTION_CANCEL:
7903                mIsDragging = false;
7904            }
7905            return true;
7906        }
7907
7908        public boolean isDragging() {
7909            return mIsDragging;
7910        }
7911
7912        void positionAtCursor(final int offset, boolean bottom) {
7913            final int width = mDrawable.getIntrinsicWidth();
7914            final int height = mDrawable.getIntrinsicHeight();
7915            final int line = mLayout.getLineForOffset(offset);
7916            final int lineTop = mLayout.getLineTop(line);
7917            final int lineBottom = mLayout.getLineBottom(line);
7918
7919            final Rect bounds = sCursorControllerTempRect;
7920            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - mHotspotX)
7921                + TextView.this.mScrollX;
7922            bounds.top = (bottom ? lineBottom : lineTop - mHeight) + TextView.this.mScrollY;
7923
7924            bounds.right = bounds.left + width;
7925            bounds.bottom = bounds.top + height;
7926
7927            convertFromViewportToContentCoordinates(bounds);
7928            moveTo(bounds.left, bounds.top);
7929        }
7930    }
7931
7932    private class InsertionPointCursorController implements CursorController {
7933        private static final int DELAY_BEFORE_FADE_OUT = 4100;
7934
7935        // The cursor controller image
7936        private final HandleView mHandle;
7937
7938        private final Runnable mHider = new Runnable() {
7939            public void run() {
7940                hide();
7941            }
7942        };
7943
7944        InsertionPointCursorController() {
7945            mHandle = new HandleView(this, HandleView.CENTER);
7946        }
7947
7948        public void show() {
7949            updatePosition();
7950            mHandle.show();
7951            hideDelayed(DELAY_BEFORE_FADE_OUT);
7952        }
7953
7954        public void hide() {
7955            mHandle.hide();
7956            TextView.this.removeCallbacks(mHider);
7957        }
7958
7959        private void hideDelayed(int msec) {
7960            TextView.this.removeCallbacks(mHider);
7961            TextView.this.postDelayed(mHider, msec);
7962        }
7963
7964        public boolean isShowing() {
7965            return mHandle.isShowing();
7966        }
7967
7968        public void updatePosition(HandleView handle, int x, int y) {
7969            final int previousOffset = getSelectionStart();
7970            int offset = getHysteresisOffset(x, y, previousOffset);
7971
7972            if (offset != previousOffset) {
7973                Selection.setSelection((Spannable) mText, offset);
7974                updatePosition();
7975            }
7976            hideDelayed(DELAY_BEFORE_FADE_OUT);
7977        }
7978
7979        public void updatePosition() {
7980            final int offset = getSelectionStart();
7981
7982            if (offset < 0) {
7983                // Should never happen, safety check.
7984                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
7985                hide();
7986                return;
7987            }
7988
7989            mHandle.positionAtCursor(offset, true);
7990        }
7991
7992        public boolean onTouchEvent(MotionEvent ev) {
7993            return false;
7994        }
7995
7996        public void onTouchModeChanged(boolean isInTouchMode) {
7997            if (!isInTouchMode) {
7998                hide();
7999            }
8000        }
8001    }
8002
8003    private class SelectionModifierCursorController implements CursorController {
8004        // The cursor controller images
8005        private HandleView mStartHandle, mEndHandle;
8006        // The offsets of that last touch down event. Remembered to start selection there.
8007        private int mMinTouchOffset, mMaxTouchOffset;
8008        // Whether selection anchors are active
8009        private boolean mIsShowing;
8010
8011        private static final int DELAY_BEFORE_FADE_OUT = 4100;
8012
8013        private final Runnable mHider = new Runnable() {
8014            public void run() {
8015                hide();
8016            }
8017        };
8018
8019        SelectionModifierCursorController() {
8020            mStartHandle = new HandleView(this, HandleView.LEFT);
8021            mEndHandle = new HandleView(this, HandleView.RIGHT);
8022            mMinTouchOffset = mMaxTouchOffset = -1;
8023        }
8024
8025        public void show() {
8026            mIsShowing = true;
8027            updatePosition();
8028            mStartHandle.show();
8029            mEndHandle.show();
8030            hideInsertionPointCursorController();
8031            hideDelayed(DELAY_BEFORE_FADE_OUT);
8032        }
8033
8034        public void hide() {
8035            mStartHandle.hide();
8036            mEndHandle.hide();
8037            mIsShowing = false;
8038            removeCallbacks(mHider);
8039        }
8040
8041        private void hideDelayed(int delay) {
8042            removeCallbacks(mHider);
8043            postDelayed(mHider, delay);
8044        }
8045
8046        public boolean isShowing() {
8047            return mIsShowing;
8048        }
8049
8050        public void cancelFadeOutAnimation() {
8051            hide();
8052        }
8053
8054        public void updatePosition(HandleView handle, int x, int y) {
8055            int selectionStart = getSelectionStart();
8056            int selectionEnd = getSelectionEnd();
8057
8058            final int previousOffset = handle == mStartHandle ? selectionStart : selectionEnd;
8059            int offset = getHysteresisOffset(x, y, previousOffset);
8060
8061            // Handle the case where start and end are swapped, making sure start <= end
8062            if (handle == mStartHandle) {
8063                if (selectionStart == offset || offset > selectionEnd) {
8064                    return; // no change, no need to redraw;
8065                }
8066                // If the user "closes" the selection entirely they were probably trying to
8067                // select a single character. Help them out.
8068                if (offset == selectionEnd) {
8069                    offset = selectionEnd - 1;
8070                }
8071                selectionStart = offset;
8072            } else {
8073                if (selectionEnd == offset || offset < selectionStart) {
8074                    return; // no change, no need to redraw;
8075                }
8076                // If the user "closes" the selection entirely they were probably trying to
8077                // select a single character. Help them out.
8078                if (offset == selectionStart) {
8079                    offset = selectionStart + 1;
8080                }
8081                selectionEnd = offset;
8082            }
8083
8084            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8085            updatePosition();
8086        }
8087
8088        public void updatePosition() {
8089            final int selectionStart = getSelectionStart();
8090            final int selectionEnd = getSelectionEnd();
8091
8092            if ((selectionStart < 0) || (selectionEnd < 0)) {
8093                // Should never happen, safety check.
8094                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
8095                hide();
8096                return;
8097            }
8098
8099            mStartHandle.positionAtCursor(selectionStart, true);
8100            mEndHandle.positionAtCursor(selectionEnd, true);
8101            hideDelayed(DELAY_BEFORE_FADE_OUT);
8102        }
8103
8104        public boolean onTouchEvent(MotionEvent event) {
8105            // This is done even when the View does not have focus, so that long presses can start
8106            // selection and tap can move cursor from this tap position.
8107            if (isTextEditable()) {
8108                switch (event.getActionMasked()) {
8109                    case MotionEvent.ACTION_DOWN:
8110                        final int x = (int) event.getX();
8111                        final int y = (int) event.getY();
8112
8113                        // Remember finger down position, to be able to start selection from there
8114                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
8115
8116                        break;
8117
8118                    case MotionEvent.ACTION_POINTER_DOWN:
8119                    case MotionEvent.ACTION_POINTER_UP:
8120                        // Handle multi-point gestures. Keep min and max offset positions.
8121                        // Only activated for devices that correctly handle multi-touch.
8122                        if (mContext.getPackageManager().hasSystemFeature(
8123                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
8124                            updateMinAndMaxOffsets(event);
8125                        }
8126                        break;
8127                }
8128            }
8129            return false;
8130        }
8131
8132        /**
8133         * @param event
8134         */
8135        private void updateMinAndMaxOffsets(MotionEvent event) {
8136            int pointerCount = event.getPointerCount();
8137            for (int index = 0; index < pointerCount; index++) {
8138                final int x = (int) event.getX(index);
8139                final int y = (int) event.getY(index);
8140                int offset = getOffset(x, y);
8141                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
8142                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
8143            }
8144        }
8145
8146        public int getMinTouchOffset() {
8147            return mMinTouchOffset;
8148        }
8149
8150        public int getMaxTouchOffset() {
8151            return mMaxTouchOffset;
8152        }
8153
8154        /**
8155         * @return true iff this controller is currently used to move the selection start.
8156         */
8157        public boolean isSelectionStartDragged() {
8158            return mStartHandle.isDragging();
8159        }
8160
8161        public void onTouchModeChanged(boolean isInTouchMode) {
8162            if (!isInTouchMode) {
8163                hide();
8164            }
8165        }
8166    }
8167
8168    private void hideInsertionPointCursorController() {
8169        if (mInsertionPointCursorController != null) {
8170            mInsertionPointCursorController.hide();
8171        }
8172    }
8173
8174    private void hideControllers() {
8175        hideInsertionPointCursorController();
8176        stopTextSelectionMode();
8177    }
8178
8179    private int getOffsetForHorizontal(int line, int x) {
8180        x -= getTotalPaddingLeft();
8181        // Clamp the position to inside of the view.
8182        x = Math.max(0, x);
8183        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
8184        x += getScrollX();
8185        return getLayout().getOffsetForHorizontal(line, x);
8186    }
8187
8188    /**
8189     * Get the offset character closest to the specified absolute position.
8190     *
8191     * @param x The horizontal absolute position of a point on screen
8192     * @param y The vertical absolute position of a point on screen
8193     * @return the character offset for the character whose position is closest to the specified
8194     *  position. Returns -1 if there is no layout.
8195     *
8196     * @hide
8197     */
8198    public int getOffset(int x, int y) {
8199        if (getLayout() == null) return -1;
8200
8201        y -= getTotalPaddingTop();
8202        // Clamp the position to inside of the view.
8203        y = Math.max(0, y);
8204        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8205        y += getScrollY();
8206
8207        final int line = getLayout().getLineForVertical(y);
8208        final int offset = getOffsetForHorizontal(line, x);
8209        return offset;
8210    }
8211
8212    int getHysteresisOffset(int x, int y, int previousOffset) {
8213        final Layout layout = getLayout();
8214        if (layout == null) return -1;
8215
8216        y -= getTotalPaddingTop();
8217        // Clamp the position to inside of the view.
8218        y = Math.max(0, y);
8219        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
8220        y += getScrollY();
8221
8222        int line = getLayout().getLineForVertical(y);
8223
8224        final int previousLine = layout.getLineForOffset(previousOffset);
8225        final int previousLineTop = layout.getLineTop(previousLine);
8226        final int previousLineBottom = layout.getLineBottom(previousLine);
8227        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 8;
8228
8229        // If new line is just before or after previous line and y position is less than
8230        // hysteresisThreshold away from previous line, keep cursor on previous line.
8231        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
8232            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
8233            line = previousLine;
8234        }
8235
8236        return getOffsetForHorizontal(line, x);
8237    }
8238
8239    @ViewDebug.ExportedProperty
8240    private CharSequence            mText;
8241    private CharSequence            mTransformed;
8242    private BufferType              mBufferType = BufferType.NORMAL;
8243
8244    private int                     mInputType = EditorInfo.TYPE_NULL;
8245    private CharSequence            mHint;
8246    private Layout                  mHintLayout;
8247
8248    private KeyListener             mInput;
8249
8250    private MovementMethod          mMovement;
8251    private TransformationMethod    mTransformation;
8252    private ChangeWatcher           mChangeWatcher;
8253
8254    private ArrayList<TextWatcher>  mListeners = null;
8255
8256    // display attributes
8257    private final TextPaint         mTextPaint;
8258    private boolean                 mUserSetTextScaleX;
8259    private final Paint             mHighlightPaint;
8260    private int                     mHighlightColor = 0xCC475925;
8261    private Layout                  mLayout;
8262
8263    private long                    mShowCursor;
8264    private Blink                   mBlink;
8265    private boolean                 mCursorVisible = true;
8266
8267    // Cursor Controllers. Null when disabled.
8268    private CursorController        mInsertionPointCursorController;
8269    private CursorController        mSelectionModifierCursorController;
8270    private boolean                 mIsInTextSelectionMode = false;
8271    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
8272    // select from the current cursor position. Otherwise, select from long pressed position.
8273    private boolean                 mDPadCenterIsDown = false;
8274    private boolean                 mEnterKeyIsDown = false;
8275    private boolean                 mContextMenuTriggeredByKey = false;
8276    // Created once and shared by different CursorController helper methods.
8277    // Only one cursor controller is active at any time which prevent race conditions.
8278    private static Rect             sCursorControllerTempRect = new Rect();
8279
8280    private boolean                 mSelectAllOnFocus = false;
8281
8282    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
8283    private boolean                 mHorizontallyScrolling;
8284
8285    private int                     mAutoLinkMask;
8286    private boolean                 mLinksClickable = true;
8287
8288    private float                   mSpacingMult = 1;
8289    private float                   mSpacingAdd = 0;
8290
8291    private static final int        LINES = 1;
8292    private static final int        EMS = LINES;
8293    private static final int        PIXELS = 2;
8294
8295    private int                     mMaximum = Integer.MAX_VALUE;
8296    private int                     mMaxMode = LINES;
8297    private int                     mMinimum = 0;
8298    private int                     mMinMode = LINES;
8299
8300    private int                     mMaxWidth = Integer.MAX_VALUE;
8301    private int                     mMaxWidthMode = PIXELS;
8302    private int                     mMinWidth = 0;
8303    private int                     mMinWidthMode = PIXELS;
8304
8305    private boolean                 mSingleLine;
8306    private int                     mDesiredHeightAtMeasure = -1;
8307    private boolean                 mIncludePad = true;
8308
8309    // tmp primitives, so we don't alloc them on each draw
8310    private Path                    mHighlightPath;
8311    private boolean                 mHighlightPathBogus = true;
8312    private static final RectF      sTempRect = new RectF();
8313
8314    // XXX should be much larger
8315    private static final int        VERY_WIDE = 16384;
8316
8317    private static final int        BLINK = 500;
8318
8319    private static final int ANIMATED_SCROLL_GAP = 250;
8320    private long mLastScroll;
8321    private Scroller mScroller = null;
8322
8323    private BoringLayout.Metrics mBoring;
8324    private BoringLayout.Metrics mHintBoring;
8325
8326    private BoringLayout mSavedLayout, mSavedHintLayout;
8327
8328    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
8329    private InputFilter[] mFilters = NO_FILTERS;
8330    private static final Spanned EMPTY_SPANNED = new SpannedString("");
8331}
8332