TextView.java revision b2316968cfb96148ebcff268afd32f98150a8869 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import com.android.internal.util.FastMath;
20import com.android.internal.widget.EditableInputConnection;
21
22import org.xmlpull.v1.XmlPullParserException;
23
24import android.R;
25import android.content.ClipData;
26import android.content.ClipData.Item;
27import android.content.ClipboardManager;
28import android.content.Context;
29import android.content.pm.PackageManager;
30import android.content.res.ColorStateList;
31import android.content.res.Resources;
32import android.content.res.TypedArray;
33import android.content.res.XmlResourceParser;
34import android.graphics.Canvas;
35import android.graphics.Color;
36import android.graphics.Paint;
37import android.graphics.Path;
38import android.graphics.Rect;
39import android.graphics.RectF;
40import android.graphics.Typeface;
41import android.graphics.drawable.Drawable;
42import android.inputmethodservice.ExtractEditText;
43import android.net.Uri;
44import android.os.Bundle;
45import android.os.Handler;
46import android.os.Message;
47import android.os.Parcel;
48import android.os.Parcelable;
49import android.os.ResultReceiver;
50import android.os.SystemClock;
51import android.text.BoringLayout;
52import android.text.DynamicLayout;
53import android.text.Editable;
54import android.text.GetChars;
55import android.text.GraphicsOperations;
56import android.text.InputFilter;
57import android.text.InputType;
58import android.text.Layout;
59import android.text.ParcelableSpan;
60import android.text.Selection;
61import android.text.SpanWatcher;
62import android.text.Spannable;
63import android.text.SpannableString;
64import android.text.Spanned;
65import android.text.SpannedString;
66import android.text.StaticLayout;
67import android.text.TextPaint;
68import android.text.TextUtils;
69import android.text.TextWatcher;
70import android.text.method.ArrowKeyMovementMethod;
71import android.text.method.DateKeyListener;
72import android.text.method.DateTimeKeyListener;
73import android.text.method.DialerKeyListener;
74import android.text.method.DigitsKeyListener;
75import android.text.method.KeyListener;
76import android.text.method.LinkMovementMethod;
77import android.text.method.MetaKeyKeyListener;
78import android.text.method.MovementMethod;
79import android.text.method.PasswordTransformationMethod;
80import android.text.method.SingleLineTransformationMethod;
81import android.text.method.TextKeyListener;
82import android.text.method.TimeKeyListener;
83import android.text.method.TransformationMethod;
84import android.text.style.ClickableSpan;
85import android.text.style.ParagraphStyle;
86import android.text.style.URLSpan;
87import android.text.style.UpdateAppearance;
88import android.text.util.Linkify;
89import android.util.AttributeSet;
90import android.util.FloatMath;
91import android.util.Log;
92import android.util.TypedValue;
93import android.view.ActionMode;
94import android.view.ActionMode.Callback;
95import android.view.ContextMenu;
96import android.view.DragEvent;
97import android.view.Gravity;
98import android.view.HapticFeedbackConstants;
99import android.view.KeyCharacterMap;
100import android.view.KeyEvent;
101import android.view.LayoutInflater;
102import android.view.Menu;
103import android.view.MenuItem;
104import android.view.MotionEvent;
105import android.view.View;
106import android.view.ViewConfiguration;
107import android.view.ViewDebug;
108import android.view.ViewGroup;
109import android.view.ViewGroup.LayoutParams;
110import android.view.ViewParent;
111import android.view.ViewRoot;
112import android.view.ViewTreeObserver;
113import android.view.WindowManager;
114import android.view.accessibility.AccessibilityEvent;
115import android.view.accessibility.AccessibilityManager;
116import android.view.animation.AnimationUtils;
117import android.view.inputmethod.BaseInputConnection;
118import android.view.inputmethod.CompletionInfo;
119import android.view.inputmethod.CorrectionInfo;
120import android.view.inputmethod.EditorInfo;
121import android.view.inputmethod.ExtractedText;
122import android.view.inputmethod.ExtractedTextRequest;
123import android.view.inputmethod.InputConnection;
124import android.view.inputmethod.InputMethodManager;
125import android.widget.RemoteViews.RemoteView;
126
127import java.io.IOException;
128import java.lang.ref.WeakReference;
129import java.util.ArrayList;
130
131/**
132 * Displays text to the user and optionally allows them to edit it.  A TextView
133 * is a complete text editor, however the basic class is configured to not
134 * allow editing; see {@link EditText} for a subclass that configures the text
135 * view for editing.
136 *
137 * <p>
138 * <b>XML attributes</b>
139 * <p>
140 * See {@link android.R.styleable#TextView TextView Attributes},
141 * {@link android.R.styleable#View View Attributes}
142 *
143 * @attr ref android.R.styleable#TextView_text
144 * @attr ref android.R.styleable#TextView_bufferType
145 * @attr ref android.R.styleable#TextView_hint
146 * @attr ref android.R.styleable#TextView_textColor
147 * @attr ref android.R.styleable#TextView_textColorHighlight
148 * @attr ref android.R.styleable#TextView_textColorHint
149 * @attr ref android.R.styleable#TextView_textAppearance
150 * @attr ref android.R.styleable#TextView_textColorLink
151 * @attr ref android.R.styleable#TextView_textSize
152 * @attr ref android.R.styleable#TextView_textScaleX
153 * @attr ref android.R.styleable#TextView_typeface
154 * @attr ref android.R.styleable#TextView_textStyle
155 * @attr ref android.R.styleable#TextView_cursorVisible
156 * @attr ref android.R.styleable#TextView_maxLines
157 * @attr ref android.R.styleable#TextView_maxHeight
158 * @attr ref android.R.styleable#TextView_lines
159 * @attr ref android.R.styleable#TextView_height
160 * @attr ref android.R.styleable#TextView_minLines
161 * @attr ref android.R.styleable#TextView_minHeight
162 * @attr ref android.R.styleable#TextView_maxEms
163 * @attr ref android.R.styleable#TextView_maxWidth
164 * @attr ref android.R.styleable#TextView_ems
165 * @attr ref android.R.styleable#TextView_width
166 * @attr ref android.R.styleable#TextView_minEms
167 * @attr ref android.R.styleable#TextView_minWidth
168 * @attr ref android.R.styleable#TextView_gravity
169 * @attr ref android.R.styleable#TextView_scrollHorizontally
170 * @attr ref android.R.styleable#TextView_password
171 * @attr ref android.R.styleable#TextView_singleLine
172 * @attr ref android.R.styleable#TextView_selectAllOnFocus
173 * @attr ref android.R.styleable#TextView_includeFontPadding
174 * @attr ref android.R.styleable#TextView_maxLength
175 * @attr ref android.R.styleable#TextView_shadowColor
176 * @attr ref android.R.styleable#TextView_shadowDx
177 * @attr ref android.R.styleable#TextView_shadowDy
178 * @attr ref android.R.styleable#TextView_shadowRadius
179 * @attr ref android.R.styleable#TextView_autoLink
180 * @attr ref android.R.styleable#TextView_linksClickable
181 * @attr ref android.R.styleable#TextView_numeric
182 * @attr ref android.R.styleable#TextView_digits
183 * @attr ref android.R.styleable#TextView_phoneNumber
184 * @attr ref android.R.styleable#TextView_inputMethod
185 * @attr ref android.R.styleable#TextView_capitalize
186 * @attr ref android.R.styleable#TextView_autoText
187 * @attr ref android.R.styleable#TextView_editable
188 * @attr ref android.R.styleable#TextView_freezesText
189 * @attr ref android.R.styleable#TextView_ellipsize
190 * @attr ref android.R.styleable#TextView_drawableTop
191 * @attr ref android.R.styleable#TextView_drawableBottom
192 * @attr ref android.R.styleable#TextView_drawableRight
193 * @attr ref android.R.styleable#TextView_drawableLeft
194 * @attr ref android.R.styleable#TextView_drawablePadding
195 * @attr ref android.R.styleable#TextView_lineSpacingExtra
196 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
197 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
198 * @attr ref android.R.styleable#TextView_inputType
199 * @attr ref android.R.styleable#TextView_imeOptions
200 * @attr ref android.R.styleable#TextView_privateImeOptions
201 * @attr ref android.R.styleable#TextView_imeActionLabel
202 * @attr ref android.R.styleable#TextView_imeActionId
203 * @attr ref android.R.styleable#TextView_editorExtras
204 */
205@RemoteView
206public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
207    static final String LOG_TAG = "TextView";
208    static final boolean DEBUG_EXTRACT = false;
209
210    private static final int PRIORITY = 100;
211
212    private int mCurrentAlpha = 255;
213
214    final int[] mTempCoords = new int[2];
215    Rect mTempRect;
216
217    private ColorStateList mTextColor;
218    private int mCurTextColor;
219    private ColorStateList mHintTextColor;
220    private ColorStateList mLinkTextColor;
221    private int mCurHintTextColor;
222    private boolean mFreezesText;
223    private boolean mFrozenWithFocus;
224    private boolean mTemporaryDetach;
225    private boolean mDispatchTemporaryDetach;
226
227    private boolean mDiscardNextActionUp = false;
228    private boolean mIgnoreActionUpEvent = false;
229
230    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
231    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
232
233    private float mShadowRadius, mShadowDx, mShadowDy;
234
235    private static final int PREDRAW_NOT_REGISTERED = 0;
236    private static final int PREDRAW_PENDING = 1;
237    private static final int PREDRAW_DONE = 2;
238    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
239
240    private TextUtils.TruncateAt mEllipsize = null;
241
242    // Enum for the "typeface" XML parameter.
243    // TODO: How can we get this from the XML instead of hardcoding it here?
244    private static final int SANS = 1;
245    private static final int SERIF = 2;
246    private static final int MONOSPACE = 3;
247
248    // Bitfield for the "numeric" XML parameter.
249    // TODO: How can we get this from the XML instead of hardcoding it here?
250    private static final int SIGNED = 2;
251    private static final int DECIMAL = 4;
252
253    class Drawables {
254        final Rect mCompoundRect = new Rect();
255        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
256        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
257        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
258        int mDrawablePadding;
259    }
260    private Drawables mDrawables;
261
262    private CharSequence mError;
263    private boolean mErrorWasChanged;
264    private ErrorPopup mPopup;
265    /**
266     * This flag is set if the TextView tries to display an error before it
267     * is attached to the window (so its position is still unknown).
268     * It causes the error to be shown later, when onAttachedToWindow()
269     * is called.
270     */
271    private boolean mShowErrorAfterAttach;
272
273    private CharWrapper mCharWrapper = null;
274
275    private boolean mSelectionMoved = false;
276    private boolean mTouchFocusSelected = false;
277
278    private Marquee mMarquee;
279    private boolean mRestartMarquee;
280
281    private int mMarqueeRepeatLimit = 3;
282
283    class InputContentType {
284        int imeOptions = EditorInfo.IME_NULL;
285        String privateImeOptions;
286        CharSequence imeActionLabel;
287        int imeActionId;
288        Bundle extras;
289        OnEditorActionListener onEditorActionListener;
290        boolean enterDown;
291    }
292    InputContentType mInputContentType;
293
294    class InputMethodState {
295        Rect mCursorRectInWindow = new Rect();
296        RectF mTmpRectF = new RectF();
297        float[] mTmpOffset = new float[2];
298        ExtractedTextRequest mExtracting;
299        final ExtractedText mTmpExtracted = new ExtractedText();
300        int mBatchEditNesting;
301        boolean mCursorChanged;
302        boolean mSelectionModeChanged;
303        boolean mContentChanged;
304        int mChangedStart, mChangedEnd, mChangedDelta;
305    }
306    InputMethodState mInputMethodState;
307
308    int mTextSelectHandleLeftRes;
309    int mTextSelectHandleRightRes;
310    int mTextSelectHandleRes;
311    int mTextEditPasteWindowLayout;
312    int mTextEditNoPasteWindowLayout;
313
314    Drawable mSelectHandleLeft;
315    Drawable mSelectHandleRight;
316    Drawable mSelectHandleCenter;
317
318    private int mLastDownPositionX, mLastDownPositionY;
319    private Callback mCustomSelectionActionModeCallback;
320
321    private final int mSquaredTouchSlopDistance;
322    // Set when this TextView gained focus with some text selected. Will start selection mode.
323    private boolean mCreatedWithASelection = false;
324
325    /*
326     * Kick-start the font cache for the zygote process (to pay the cost of
327     * initializing freetype for our default font only once).
328     */
329    static {
330        Paint p = new Paint();
331        p.setAntiAlias(true);
332        // We don't care about the result, just the side-effect of measuring.
333        p.measureText("H");
334    }
335
336    /**
337     * Interface definition for a callback to be invoked when an action is
338     * performed on the editor.
339     */
340    public interface OnEditorActionListener {
341        /**
342         * Called when an action is being performed.
343         *
344         * @param v The view that was clicked.
345         * @param actionId Identifier of the action.  This will be either the
346         * identifier you supplied, or {@link EditorInfo#IME_NULL
347         * EditorInfo.IME_NULL} if being called due to the enter key
348         * being pressed.
349         * @param event If triggered by an enter key, this is the event;
350         * otherwise, this is null.
351         * @return Return true if you have consumed the action, else false.
352         */
353        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
354    }
355
356    public TextView(Context context) {
357        this(context, null);
358    }
359
360    public TextView(Context context,
361                    AttributeSet attrs) {
362        this(context, attrs, com.android.internal.R.attr.textViewStyle);
363    }
364
365    @SuppressWarnings("deprecation")
366    public TextView(Context context,
367                    AttributeSet attrs,
368                    int defStyle) {
369        super(context, attrs, defStyle);
370        mText = "";
371
372        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
373        mTextPaint.density = getResources().getDisplayMetrics().density;
374        mTextPaint.setCompatibilityScaling(
375                getResources().getCompatibilityInfo().applicationScale);
376
377        // If we get the paint from the skin, we should set it to left, since
378        // the layout always wants it to be left.
379        // mTextPaint.setTextAlign(Paint.Align.LEFT);
380
381        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
382        mHighlightPaint.setCompatibilityScaling(
383                getResources().getCompatibilityInfo().applicationScale);
384
385        mMovement = getDefaultMovementMethod();
386        mTransformation = null;
387
388        TypedArray a =
389            context.obtainStyledAttributes(
390                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
391
392        int textColorHighlight = 0;
393        ColorStateList textColor = null;
394        ColorStateList textColorHint = null;
395        ColorStateList textColorLink = null;
396        int textSize = 15;
397        int typefaceIndex = -1;
398        int styleIndex = -1;
399
400        /*
401         * Look the appearance up without checking first if it exists because
402         * almost every TextView has one and it greatly simplifies the logic
403         * to be able to parse the appearance first and then let specific tags
404         * for this View override it.
405         */
406        TypedArray appearance = null;
407        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
408        if (ap != -1) {
409            appearance = context.obtainStyledAttributes(ap,
410                                com.android.internal.R.styleable.
411                                TextAppearance);
412        }
413        if (appearance != null) {
414            int n = appearance.getIndexCount();
415            for (int i = 0; i < n; i++) {
416                int attr = appearance.getIndex(i);
417
418                switch (attr) {
419                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
420                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
421                    break;
422
423                case com.android.internal.R.styleable.TextAppearance_textColor:
424                    textColor = appearance.getColorStateList(attr);
425                    break;
426
427                case com.android.internal.R.styleable.TextAppearance_textColorHint:
428                    textColorHint = appearance.getColorStateList(attr);
429                    break;
430
431                case com.android.internal.R.styleable.TextAppearance_textColorLink:
432                    textColorLink = appearance.getColorStateList(attr);
433                    break;
434
435                case com.android.internal.R.styleable.TextAppearance_textSize:
436                    textSize = appearance.getDimensionPixelSize(attr, textSize);
437                    break;
438
439                case com.android.internal.R.styleable.TextAppearance_typeface:
440                    typefaceIndex = appearance.getInt(attr, -1);
441                    break;
442
443                case com.android.internal.R.styleable.TextAppearance_textStyle:
444                    styleIndex = appearance.getInt(attr, -1);
445                    break;
446                }
447            }
448
449            appearance.recycle();
450        }
451
452        boolean editable = getDefaultEditable();
453        CharSequence inputMethod = null;
454        int numeric = 0;
455        CharSequence digits = null;
456        boolean phone = false;
457        boolean autotext = false;
458        int autocap = -1;
459        int buffertype = 0;
460        boolean selectallonfocus = false;
461        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
462            drawableBottom = null;
463        int drawablePadding = 0;
464        int ellipsize = -1;
465        boolean singleLine = false;
466        int maxlength = -1;
467        CharSequence text = "";
468        CharSequence hint = null;
469        int shadowcolor = 0;
470        float dx = 0, dy = 0, r = 0;
471        boolean password = false;
472        int inputType = EditorInfo.TYPE_NULL;
473
474        int n = a.getIndexCount();
475        for (int i = 0; i < n; i++) {
476            int attr = a.getIndex(i);
477
478            switch (attr) {
479            case com.android.internal.R.styleable.TextView_editable:
480                editable = a.getBoolean(attr, editable);
481                break;
482
483            case com.android.internal.R.styleable.TextView_inputMethod:
484                inputMethod = a.getText(attr);
485                break;
486
487            case com.android.internal.R.styleable.TextView_numeric:
488                numeric = a.getInt(attr, numeric);
489                break;
490
491            case com.android.internal.R.styleable.TextView_digits:
492                digits = a.getText(attr);
493                break;
494
495            case com.android.internal.R.styleable.TextView_phoneNumber:
496                phone = a.getBoolean(attr, phone);
497                break;
498
499            case com.android.internal.R.styleable.TextView_autoText:
500                autotext = a.getBoolean(attr, autotext);
501                break;
502
503            case com.android.internal.R.styleable.TextView_capitalize:
504                autocap = a.getInt(attr, autocap);
505                break;
506
507            case com.android.internal.R.styleable.TextView_bufferType:
508                buffertype = a.getInt(attr, buffertype);
509                break;
510
511            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
512                selectallonfocus = a.getBoolean(attr, selectallonfocus);
513                break;
514
515            case com.android.internal.R.styleable.TextView_autoLink:
516                mAutoLinkMask = a.getInt(attr, 0);
517                break;
518
519            case com.android.internal.R.styleable.TextView_linksClickable:
520                mLinksClickable = a.getBoolean(attr, true);
521                break;
522
523            case com.android.internal.R.styleable.TextView_drawableLeft:
524                drawableLeft = a.getDrawable(attr);
525                break;
526
527            case com.android.internal.R.styleable.TextView_drawableTop:
528                drawableTop = a.getDrawable(attr);
529                break;
530
531            case com.android.internal.R.styleable.TextView_drawableRight:
532                drawableRight = a.getDrawable(attr);
533                break;
534
535            case com.android.internal.R.styleable.TextView_drawableBottom:
536                drawableBottom = a.getDrawable(attr);
537                break;
538
539            case com.android.internal.R.styleable.TextView_drawablePadding:
540                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
541                break;
542
543            case com.android.internal.R.styleable.TextView_maxLines:
544                setMaxLines(a.getInt(attr, -1));
545                break;
546
547            case com.android.internal.R.styleable.TextView_maxHeight:
548                setMaxHeight(a.getDimensionPixelSize(attr, -1));
549                break;
550
551            case com.android.internal.R.styleable.TextView_lines:
552                setLines(a.getInt(attr, -1));
553                break;
554
555            case com.android.internal.R.styleable.TextView_height:
556                setHeight(a.getDimensionPixelSize(attr, -1));
557                break;
558
559            case com.android.internal.R.styleable.TextView_minLines:
560                setMinLines(a.getInt(attr, -1));
561                break;
562
563            case com.android.internal.R.styleable.TextView_minHeight:
564                setMinHeight(a.getDimensionPixelSize(attr, -1));
565                break;
566
567            case com.android.internal.R.styleable.TextView_maxEms:
568                setMaxEms(a.getInt(attr, -1));
569                break;
570
571            case com.android.internal.R.styleable.TextView_maxWidth:
572                setMaxWidth(a.getDimensionPixelSize(attr, -1));
573                break;
574
575            case com.android.internal.R.styleable.TextView_ems:
576                setEms(a.getInt(attr, -1));
577                break;
578
579            case com.android.internal.R.styleable.TextView_width:
580                setWidth(a.getDimensionPixelSize(attr, -1));
581                break;
582
583            case com.android.internal.R.styleable.TextView_minEms:
584                setMinEms(a.getInt(attr, -1));
585                break;
586
587            case com.android.internal.R.styleable.TextView_minWidth:
588                setMinWidth(a.getDimensionPixelSize(attr, -1));
589                break;
590
591            case com.android.internal.R.styleable.TextView_gravity:
592                setGravity(a.getInt(attr, -1));
593                break;
594
595            case com.android.internal.R.styleable.TextView_hint:
596                hint = a.getText(attr);
597                break;
598
599            case com.android.internal.R.styleable.TextView_text:
600                text = a.getText(attr);
601                break;
602
603            case com.android.internal.R.styleable.TextView_scrollHorizontally:
604                if (a.getBoolean(attr, false)) {
605                    setHorizontallyScrolling(true);
606                }
607                break;
608
609            case com.android.internal.R.styleable.TextView_singleLine:
610                singleLine = a.getBoolean(attr, singleLine);
611                break;
612
613            case com.android.internal.R.styleable.TextView_ellipsize:
614                ellipsize = a.getInt(attr, ellipsize);
615                break;
616
617            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
618                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
619                break;
620
621            case com.android.internal.R.styleable.TextView_includeFontPadding:
622                if (!a.getBoolean(attr, true)) {
623                    setIncludeFontPadding(false);
624                }
625                break;
626
627            case com.android.internal.R.styleable.TextView_cursorVisible:
628                if (!a.getBoolean(attr, true)) {
629                    setCursorVisible(false);
630                }
631                break;
632
633            case com.android.internal.R.styleable.TextView_maxLength:
634                maxlength = a.getInt(attr, -1);
635                break;
636
637            case com.android.internal.R.styleable.TextView_textScaleX:
638                setTextScaleX(a.getFloat(attr, 1.0f));
639                break;
640
641            case com.android.internal.R.styleable.TextView_freezesText:
642                mFreezesText = a.getBoolean(attr, false);
643                break;
644
645            case com.android.internal.R.styleable.TextView_shadowColor:
646                shadowcolor = a.getInt(attr, 0);
647                break;
648
649            case com.android.internal.R.styleable.TextView_shadowDx:
650                dx = a.getFloat(attr, 0);
651                break;
652
653            case com.android.internal.R.styleable.TextView_shadowDy:
654                dy = a.getFloat(attr, 0);
655                break;
656
657            case com.android.internal.R.styleable.TextView_shadowRadius:
658                r = a.getFloat(attr, 0);
659                break;
660
661            case com.android.internal.R.styleable.TextView_enabled:
662                setEnabled(a.getBoolean(attr, isEnabled()));
663                break;
664
665            case com.android.internal.R.styleable.TextView_textColorHighlight:
666                textColorHighlight = a.getColor(attr, textColorHighlight);
667                break;
668
669            case com.android.internal.R.styleable.TextView_textColor:
670                textColor = a.getColorStateList(attr);
671                break;
672
673            case com.android.internal.R.styleable.TextView_textColorHint:
674                textColorHint = a.getColorStateList(attr);
675                break;
676
677            case com.android.internal.R.styleable.TextView_textColorLink:
678                textColorLink = a.getColorStateList(attr);
679                break;
680
681            case com.android.internal.R.styleable.TextView_textSize:
682                textSize = a.getDimensionPixelSize(attr, textSize);
683                break;
684
685            case com.android.internal.R.styleable.TextView_typeface:
686                typefaceIndex = a.getInt(attr, typefaceIndex);
687                break;
688
689            case com.android.internal.R.styleable.TextView_textStyle:
690                styleIndex = a.getInt(attr, styleIndex);
691                break;
692
693            case com.android.internal.R.styleable.TextView_password:
694                password = a.getBoolean(attr, password);
695                break;
696
697            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
698                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
699                break;
700
701            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
702                mSpacingMult = a.getFloat(attr, mSpacingMult);
703                break;
704
705            case com.android.internal.R.styleable.TextView_inputType:
706                inputType = a.getInt(attr, mInputType);
707                break;
708
709            case com.android.internal.R.styleable.TextView_imeOptions:
710                if (mInputContentType == null) {
711                    mInputContentType = new InputContentType();
712                }
713                mInputContentType.imeOptions = a.getInt(attr,
714                        mInputContentType.imeOptions);
715                break;
716
717            case com.android.internal.R.styleable.TextView_imeActionLabel:
718                if (mInputContentType == null) {
719                    mInputContentType = new InputContentType();
720                }
721                mInputContentType.imeActionLabel = a.getText(attr);
722                break;
723
724            case com.android.internal.R.styleable.TextView_imeActionId:
725                if (mInputContentType == null) {
726                    mInputContentType = new InputContentType();
727                }
728                mInputContentType.imeActionId = a.getInt(attr,
729                        mInputContentType.imeActionId);
730                break;
731
732            case com.android.internal.R.styleable.TextView_privateImeOptions:
733                setPrivateImeOptions(a.getString(attr));
734                break;
735
736            case com.android.internal.R.styleable.TextView_editorExtras:
737                try {
738                    setInputExtras(a.getResourceId(attr, 0));
739                } catch (XmlPullParserException e) {
740                    Log.w(LOG_TAG, "Failure reading input extras", e);
741                } catch (IOException e) {
742                    Log.w(LOG_TAG, "Failure reading input extras", e);
743                }
744                break;
745
746            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
747                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
748                break;
749
750            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
751                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
752                break;
753
754            case com.android.internal.R.styleable.TextView_textSelectHandle:
755                mTextSelectHandleRes = a.getResourceId(attr, 0);
756                break;
757
758            case com.android.internal.R.styleable.TextView_textEditPasteWindowLayout:
759                mTextEditPasteWindowLayout = a.getResourceId(attr, 0);
760                break;
761
762            case com.android.internal.R.styleable.TextView_textEditNoPasteWindowLayout:
763                mTextEditNoPasteWindowLayout = a.getResourceId(attr, 0);
764                break;
765
766            case com.android.internal.R.styleable.TextView_textIsSelectable:
767                mTextIsSelectable = a.getBoolean(attr, false);
768                break;
769            }
770        }
771        a.recycle();
772
773        BufferType bufferType = BufferType.EDITABLE;
774
775        final int variation =
776                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
777        final boolean passwordInputType = variation
778                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
779        final boolean webPasswordInputType = variation
780                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
781        final boolean numberPasswordInputType = variation
782                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
783
784        if (inputMethod != null) {
785            Class<?> c;
786
787            try {
788                c = Class.forName(inputMethod.toString());
789            } catch (ClassNotFoundException ex) {
790                throw new RuntimeException(ex);
791            }
792
793            try {
794                mInput = (KeyListener) c.newInstance();
795            } catch (InstantiationException ex) {
796                throw new RuntimeException(ex);
797            } catch (IllegalAccessException ex) {
798                throw new RuntimeException(ex);
799            }
800            try {
801                mInputType = inputType != EditorInfo.TYPE_NULL
802                        ? inputType
803                        : mInput.getInputType();
804            } catch (IncompatibleClassChangeError e) {
805                mInputType = EditorInfo.TYPE_CLASS_TEXT;
806            }
807        } else if (digits != null) {
808            mInput = DigitsKeyListener.getInstance(digits.toString());
809            // If no input type was specified, we will default to generic
810            // text, since we can't tell the IME about the set of digits
811            // that was selected.
812            mInputType = inputType != EditorInfo.TYPE_NULL
813                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
814        } else if (inputType != EditorInfo.TYPE_NULL) {
815            setInputType(inputType, true);
816            // If set, the input type overrides what was set using the deprecated singleLine flag.
817            singleLine = !isMultilineInputType(inputType);
818        } else if (phone) {
819            mInput = DialerKeyListener.getInstance();
820            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
821        } else if (numeric != 0) {
822            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
823                                                   (numeric & DECIMAL) != 0);
824            inputType = EditorInfo.TYPE_CLASS_NUMBER;
825            if ((numeric & SIGNED) != 0) {
826                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
827            }
828            if ((numeric & DECIMAL) != 0) {
829                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
830            }
831            mInputType = inputType;
832        } else if (autotext || autocap != -1) {
833            TextKeyListener.Capitalize cap;
834
835            inputType = EditorInfo.TYPE_CLASS_TEXT;
836
837            switch (autocap) {
838            case 1:
839                cap = TextKeyListener.Capitalize.SENTENCES;
840                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
841                break;
842
843            case 2:
844                cap = TextKeyListener.Capitalize.WORDS;
845                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
846                break;
847
848            case 3:
849                cap = TextKeyListener.Capitalize.CHARACTERS;
850                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
851                break;
852
853            default:
854                cap = TextKeyListener.Capitalize.NONE;
855                break;
856            }
857
858            mInput = TextKeyListener.getInstance(autotext, cap);
859            mInputType = inputType;
860        } else if (mTextIsSelectable) {
861            // Prevent text changes from keyboard.
862            mInputType = EditorInfo.TYPE_NULL;
863            mInput = null;
864            bufferType = BufferType.SPANNABLE;
865            // Required to request focus while in touch mode.
866            setFocusableInTouchMode(true);
867            // So that selection can be changed using arrow keys and touch is handled.
868            setMovementMethod(ArrowKeyMovementMethod.getInstance());
869        } else if (editable) {
870            mInput = TextKeyListener.getInstance();
871            mInputType = EditorInfo.TYPE_CLASS_TEXT;
872        } else {
873            mInput = null;
874
875            switch (buffertype) {
876                case 0:
877                    bufferType = BufferType.NORMAL;
878                    break;
879                case 1:
880                    bufferType = BufferType.SPANNABLE;
881                    break;
882                case 2:
883                    bufferType = BufferType.EDITABLE;
884                    break;
885            }
886        }
887
888        // mInputType has been set from inputType, possibly modified by mInputMethod.
889        // Specialize mInputType to [web]password if we have a text class and the original input
890        // type was a password.
891        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
892            if (password || passwordInputType) {
893                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
894                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
895            }
896            if (webPasswordInputType) {
897                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
898                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
899            }
900        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
901            if (numberPasswordInputType) {
902                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
903                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
904            }
905        }
906
907        if (selectallonfocus) {
908            mSelectAllOnFocus = true;
909
910            if (bufferType == BufferType.NORMAL)
911                bufferType = BufferType.SPANNABLE;
912        }
913
914        setCompoundDrawablesWithIntrinsicBounds(
915            drawableLeft, drawableTop, drawableRight, drawableBottom);
916        setCompoundDrawablePadding(drawablePadding);
917
918        // Same as setSingleLine(), but make sure the transformation method and the maximum number
919        // of lines of height are unchanged for multi-line TextViews.
920        setInputTypeSingleLine(singleLine);
921        applySingleLine(singleLine, singleLine, singleLine);
922
923        if (singleLine && mInput == null && ellipsize < 0) {
924                ellipsize = 3; // END
925        }
926
927        switch (ellipsize) {
928            case 1:
929                setEllipsize(TextUtils.TruncateAt.START);
930                break;
931            case 2:
932                setEllipsize(TextUtils.TruncateAt.MIDDLE);
933                break;
934            case 3:
935                setEllipsize(TextUtils.TruncateAt.END);
936                break;
937            case 4:
938                setHorizontalFadingEdgeEnabled(true);
939                setEllipsize(TextUtils.TruncateAt.MARQUEE);
940                break;
941        }
942
943        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
944        setHintTextColor(textColorHint);
945        setLinkTextColor(textColorLink);
946        if (textColorHighlight != 0) {
947            setHighlightColor(textColorHighlight);
948        }
949        setRawTextSize(textSize);
950
951        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
952            setTransformationMethod(PasswordTransformationMethod.getInstance());
953            typefaceIndex = MONOSPACE;
954        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
955                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
956            typefaceIndex = MONOSPACE;
957        }
958
959        setTypefaceByIndex(typefaceIndex, styleIndex);
960
961        if (shadowcolor != 0) {
962            setShadowLayer(r, dx, dy, shadowcolor);
963        }
964
965        if (maxlength >= 0) {
966            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
967        } else {
968            setFilters(NO_FILTERS);
969        }
970
971        setText(text, bufferType);
972        if (hint != null) setHint(hint);
973
974        /*
975         * Views are not normally focusable unless specified to be.
976         * However, TextViews that have input or movement methods *are*
977         * focusable by default.
978         */
979        a = context.obtainStyledAttributes(attrs,
980                                           com.android.internal.R.styleable.View,
981                                           defStyle, 0);
982
983        boolean focusable = mMovement != null || mInput != null;
984        boolean clickable = focusable;
985        boolean longClickable = focusable;
986
987        n = a.getIndexCount();
988        for (int i = 0; i < n; i++) {
989            int attr = a.getIndex(i);
990
991            switch (attr) {
992            case com.android.internal.R.styleable.View_focusable:
993                focusable = a.getBoolean(attr, focusable);
994                break;
995
996            case com.android.internal.R.styleable.View_clickable:
997                clickable = a.getBoolean(attr, clickable);
998                break;
999
1000            case com.android.internal.R.styleable.View_longClickable:
1001                longClickable = a.getBoolean(attr, longClickable);
1002                break;
1003            }
1004        }
1005        a.recycle();
1006
1007        setFocusable(focusable);
1008        setClickable(clickable);
1009        setLongClickable(longClickable);
1010
1011        prepareCursorControllers();
1012
1013        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1014        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1015        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1016    }
1017
1018    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1019        Typeface tf = null;
1020        switch (typefaceIndex) {
1021            case SANS:
1022                tf = Typeface.SANS_SERIF;
1023                break;
1024
1025            case SERIF:
1026                tf = Typeface.SERIF;
1027                break;
1028
1029            case MONOSPACE:
1030                tf = Typeface.MONOSPACE;
1031                break;
1032        }
1033
1034        setTypeface(tf, styleIndex);
1035    }
1036
1037    @Override
1038    public void setEnabled(boolean enabled) {
1039        if (enabled == isEnabled()) {
1040            return;
1041        }
1042
1043        if (!enabled) {
1044            // Hide the soft input if the currently active TextView is disabled
1045            InputMethodManager imm = InputMethodManager.peekInstance();
1046            if (imm != null && imm.isActive(this)) {
1047                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1048            }
1049        }
1050        super.setEnabled(enabled);
1051    }
1052
1053    /**
1054     * Sets the typeface and style in which the text should be displayed,
1055     * and turns on the fake bold and italic bits in the Paint if the
1056     * Typeface that you provided does not have all the bits in the
1057     * style that you specified.
1058     *
1059     * @attr ref android.R.styleable#TextView_typeface
1060     * @attr ref android.R.styleable#TextView_textStyle
1061     */
1062    public void setTypeface(Typeface tf, int style) {
1063        if (style > 0) {
1064            if (tf == null) {
1065                tf = Typeface.defaultFromStyle(style);
1066            } else {
1067                tf = Typeface.create(tf, style);
1068            }
1069
1070            setTypeface(tf);
1071            // now compute what (if any) algorithmic styling is needed
1072            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1073            int need = style & ~typefaceStyle;
1074            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1075            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1076        } else {
1077            mTextPaint.setFakeBoldText(false);
1078            mTextPaint.setTextSkewX(0);
1079            setTypeface(tf);
1080        }
1081    }
1082
1083    /**
1084     * Subclasses override this to specify that they have a KeyListener
1085     * by default even if not specifically called for in the XML options.
1086     */
1087    protected boolean getDefaultEditable() {
1088        return false;
1089    }
1090
1091    /**
1092     * Subclasses override this to specify a default movement method.
1093     */
1094    protected MovementMethod getDefaultMovementMethod() {
1095        return null;
1096    }
1097
1098    /**
1099     * Return the text the TextView is displaying. If setText() was called with
1100     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1101     * the return value from this method to Spannable or Editable, respectively.
1102     *
1103     * Note: The content of the return value should not be modified. If you want
1104     * a modifiable one, you should make your own copy first.
1105     */
1106    @ViewDebug.CapturedViewProperty
1107    public CharSequence getText() {
1108        return mText;
1109    }
1110
1111    /**
1112     * Returns the length, in characters, of the text managed by this TextView
1113     */
1114    public int length() {
1115        return mText.length();
1116    }
1117
1118    /**
1119     * Return the text the TextView is displaying as an Editable object.  If
1120     * the text is not editable, null is returned.
1121     *
1122     * @see #getText
1123     */
1124    public Editable getEditableText() {
1125        return (mText instanceof Editable) ? (Editable)mText : null;
1126    }
1127
1128    /**
1129     * @return the height of one standard line in pixels.  Note that markup
1130     * within the text can cause individual lines to be taller or shorter
1131     * than this height, and the layout may contain additional first-
1132     * or last-line padding.
1133     */
1134    public int getLineHeight() {
1135        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1136    }
1137
1138    /**
1139     * @return the Layout that is currently being used to display the text.
1140     * This can be null if the text or width has recently changes.
1141     */
1142    public final Layout getLayout() {
1143        return mLayout;
1144    }
1145
1146    /**
1147     * @return the current key listener for this TextView.
1148     * This will frequently be null for non-EditText TextViews.
1149     */
1150    public final KeyListener getKeyListener() {
1151        return mInput;
1152    }
1153
1154    /**
1155     * Sets the key listener to be used with this TextView.  This can be null
1156     * to disallow user input.  Note that this method has significant and
1157     * subtle interactions with soft keyboards and other input method:
1158     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1159     * for important details.  Calling this method will replace the current
1160     * content type of the text view with the content type returned by the
1161     * key listener.
1162     * <p>
1163     * Be warned that if you want a TextView with a key listener or movement
1164     * method not to be focusable, or if you want a TextView without a
1165     * key listener or movement method to be focusable, you must call
1166     * {@link #setFocusable} again after calling this to get the focusability
1167     * back the way you want it.
1168     *
1169     * @attr ref android.R.styleable#TextView_numeric
1170     * @attr ref android.R.styleable#TextView_digits
1171     * @attr ref android.R.styleable#TextView_phoneNumber
1172     * @attr ref android.R.styleable#TextView_inputMethod
1173     * @attr ref android.R.styleable#TextView_capitalize
1174     * @attr ref android.R.styleable#TextView_autoText
1175     */
1176    public void setKeyListener(KeyListener input) {
1177        setKeyListenerOnly(input);
1178        fixFocusableAndClickableSettings();
1179
1180        if (input != null) {
1181            try {
1182                mInputType = mInput.getInputType();
1183            } catch (IncompatibleClassChangeError e) {
1184                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1185            }
1186            // Change inputType, without affecting transformation.
1187            // No need to applySingleLine since mSingleLine is unchanged.
1188            setInputTypeSingleLine(mSingleLine);
1189        } else {
1190            mInputType = EditorInfo.TYPE_NULL;
1191        }
1192
1193        InputMethodManager imm = InputMethodManager.peekInstance();
1194        if (imm != null) imm.restartInput(this);
1195    }
1196
1197    private void setKeyListenerOnly(KeyListener input) {
1198        mInput = input;
1199        if (mInput != null && !(mText instanceof Editable))
1200            setText(mText);
1201
1202        setFilters((Editable) mText, mFilters);
1203    }
1204
1205    /**
1206     * @return the movement method being used for this TextView.
1207     * This will frequently be null for non-EditText TextViews.
1208     */
1209    public final MovementMethod getMovementMethod() {
1210        return mMovement;
1211    }
1212
1213    /**
1214     * Sets the movement method (arrow key handler) to be used for
1215     * this TextView.  This can be null to disallow using the arrow keys
1216     * to move the cursor or scroll the view.
1217     * <p>
1218     * Be warned that if you want a TextView with a key listener or movement
1219     * method not to be focusable, or if you want a TextView without a
1220     * key listener or movement method to be focusable, you must call
1221     * {@link #setFocusable} again after calling this to get the focusability
1222     * back the way you want it.
1223     */
1224    public final void setMovementMethod(MovementMethod movement) {
1225        mMovement = movement;
1226
1227        if (mMovement != null && !(mText instanceof Spannable))
1228            setText(mText);
1229
1230        fixFocusableAndClickableSettings();
1231
1232        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1233        prepareCursorControllers();
1234    }
1235
1236    private void fixFocusableAndClickableSettings() {
1237        if ((mMovement != null) || mInput != null) {
1238            setFocusable(true);
1239            setClickable(true);
1240            setLongClickable(true);
1241        } else {
1242            setFocusable(false);
1243            setClickable(false);
1244            setLongClickable(false);
1245        }
1246    }
1247
1248    /**
1249     * @return the current transformation method for this TextView.
1250     * This will frequently be null except for single-line and password
1251     * fields.
1252     */
1253    public final TransformationMethod getTransformationMethod() {
1254        return mTransformation;
1255    }
1256
1257    /**
1258     * Sets the transformation that is applied to the text that this
1259     * TextView is displaying.
1260     *
1261     * @attr ref android.R.styleable#TextView_password
1262     * @attr ref android.R.styleable#TextView_singleLine
1263     */
1264    public final void setTransformationMethod(TransformationMethod method) {
1265        if (method == mTransformation) {
1266            // Avoid the setText() below if the transformation is
1267            // the same.
1268            return;
1269        }
1270        if (mTransformation != null) {
1271            if (mText instanceof Spannable) {
1272                ((Spannable) mText).removeSpan(mTransformation);
1273            }
1274        }
1275
1276        mTransformation = method;
1277
1278        setText(mText);
1279    }
1280
1281    /**
1282     * Returns the top padding of the view, plus space for the top
1283     * Drawable if any.
1284     */
1285    public int getCompoundPaddingTop() {
1286        final Drawables dr = mDrawables;
1287        if (dr == null || dr.mDrawableTop == null) {
1288            return mPaddingTop;
1289        } else {
1290            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1291        }
1292    }
1293
1294    /**
1295     * Returns the bottom padding of the view, plus space for the bottom
1296     * Drawable if any.
1297     */
1298    public int getCompoundPaddingBottom() {
1299        final Drawables dr = mDrawables;
1300        if (dr == null || dr.mDrawableBottom == null) {
1301            return mPaddingBottom;
1302        } else {
1303            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1304        }
1305    }
1306
1307    /**
1308     * Returns the left padding of the view, plus space for the left
1309     * Drawable if any.
1310     */
1311    public int getCompoundPaddingLeft() {
1312        final Drawables dr = mDrawables;
1313        if (dr == null || dr.mDrawableLeft == null) {
1314            return mPaddingLeft;
1315        } else {
1316            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1317        }
1318    }
1319
1320    /**
1321     * Returns the right padding of the view, plus space for the right
1322     * Drawable if any.
1323     */
1324    public int getCompoundPaddingRight() {
1325        final Drawables dr = mDrawables;
1326        if (dr == null || dr.mDrawableRight == null) {
1327            return mPaddingRight;
1328        } else {
1329            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1330        }
1331    }
1332
1333    /**
1334     * Returns the extended top padding of the view, including both the
1335     * top Drawable if any and any extra space to keep more than maxLines
1336     * of text from showing.  It is only valid to call this after measuring.
1337     */
1338    public int getExtendedPaddingTop() {
1339        if (mMaxMode != LINES) {
1340            return getCompoundPaddingTop();
1341        }
1342
1343        if (mLayout.getLineCount() <= mMaximum) {
1344            return getCompoundPaddingTop();
1345        }
1346
1347        int top = getCompoundPaddingTop();
1348        int bottom = getCompoundPaddingBottom();
1349        int viewht = getHeight() - top - bottom;
1350        int layoutht = mLayout.getLineTop(mMaximum);
1351
1352        if (layoutht >= viewht) {
1353            return top;
1354        }
1355
1356        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1357        if (gravity == Gravity.TOP) {
1358            return top;
1359        } else if (gravity == Gravity.BOTTOM) {
1360            return top + viewht - layoutht;
1361        } else { // (gravity == Gravity.CENTER_VERTICAL)
1362            return top + (viewht - layoutht) / 2;
1363        }
1364    }
1365
1366    /**
1367     * Returns the extended bottom padding of the view, including both the
1368     * bottom Drawable if any and any extra space to keep more than maxLines
1369     * of text from showing.  It is only valid to call this after measuring.
1370     */
1371    public int getExtendedPaddingBottom() {
1372        if (mMaxMode != LINES) {
1373            return getCompoundPaddingBottom();
1374        }
1375
1376        if (mLayout.getLineCount() <= mMaximum) {
1377            return getCompoundPaddingBottom();
1378        }
1379
1380        int top = getCompoundPaddingTop();
1381        int bottom = getCompoundPaddingBottom();
1382        int viewht = getHeight() - top - bottom;
1383        int layoutht = mLayout.getLineTop(mMaximum);
1384
1385        if (layoutht >= viewht) {
1386            return bottom;
1387        }
1388
1389        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1390        if (gravity == Gravity.TOP) {
1391            return bottom + viewht - layoutht;
1392        } else if (gravity == Gravity.BOTTOM) {
1393            return bottom;
1394        } else { // (gravity == Gravity.CENTER_VERTICAL)
1395            return bottom + (viewht - layoutht) / 2;
1396        }
1397    }
1398
1399    /**
1400     * Returns the total left padding of the view, including the left
1401     * Drawable if any.
1402     */
1403    public int getTotalPaddingLeft() {
1404        return getCompoundPaddingLeft();
1405    }
1406
1407    /**
1408     * Returns the total right padding of the view, including the right
1409     * Drawable if any.
1410     */
1411    public int getTotalPaddingRight() {
1412        return getCompoundPaddingRight();
1413    }
1414
1415    /**
1416     * Returns the total top padding of the view, including the top
1417     * Drawable if any, the extra space to keep more than maxLines
1418     * from showing, and the vertical offset for gravity, if any.
1419     */
1420    public int getTotalPaddingTop() {
1421        return getExtendedPaddingTop() + getVerticalOffset(true);
1422    }
1423
1424    /**
1425     * Returns the total bottom padding of the view, including the bottom
1426     * Drawable if any, the extra space to keep more than maxLines
1427     * from showing, and the vertical offset for gravity, if any.
1428     */
1429    public int getTotalPaddingBottom() {
1430        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1431    }
1432
1433    /**
1434     * Sets the Drawables (if any) to appear to the left of, above,
1435     * to the right of, and below the text.  Use null if you do not
1436     * want a Drawable there.  The Drawables must already have had
1437     * {@link Drawable#setBounds} called.
1438     *
1439     * @attr ref android.R.styleable#TextView_drawableLeft
1440     * @attr ref android.R.styleable#TextView_drawableTop
1441     * @attr ref android.R.styleable#TextView_drawableRight
1442     * @attr ref android.R.styleable#TextView_drawableBottom
1443     */
1444    public void setCompoundDrawables(Drawable left, Drawable top,
1445                                     Drawable right, Drawable bottom) {
1446        Drawables dr = mDrawables;
1447
1448        final boolean drawables = left != null || top != null
1449                || right != null || bottom != null;
1450
1451        if (!drawables) {
1452            // Clearing drawables...  can we free the data structure?
1453            if (dr != null) {
1454                if (dr.mDrawablePadding == 0) {
1455                    mDrawables = null;
1456                } else {
1457                    // We need to retain the last set padding, so just clear
1458                    // out all of the fields in the existing structure.
1459                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1460                    dr.mDrawableLeft = null;
1461                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1462                    dr.mDrawableTop = null;
1463                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1464                    dr.mDrawableRight = null;
1465                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1466                    dr.mDrawableBottom = null;
1467                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1468                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1469                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1470                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1471                }
1472            }
1473        } else {
1474            if (dr == null) {
1475                mDrawables = dr = new Drawables();
1476            }
1477
1478            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1479                dr.mDrawableLeft.setCallback(null);
1480            }
1481            dr.mDrawableLeft = left;
1482
1483            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1484                dr.mDrawableTop.setCallback(null);
1485            }
1486            dr.mDrawableTop = top;
1487
1488            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1489                dr.mDrawableRight.setCallback(null);
1490            }
1491            dr.mDrawableRight = right;
1492
1493            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1494                dr.mDrawableBottom.setCallback(null);
1495            }
1496            dr.mDrawableBottom = bottom;
1497
1498            final Rect compoundRect = dr.mCompoundRect;
1499            int[] state;
1500
1501            state = getDrawableState();
1502
1503            if (left != null) {
1504                left.setState(state);
1505                left.copyBounds(compoundRect);
1506                left.setCallback(this);
1507                dr.mDrawableSizeLeft = compoundRect.width();
1508                dr.mDrawableHeightLeft = compoundRect.height();
1509            } else {
1510                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1511            }
1512
1513            if (right != null) {
1514                right.setState(state);
1515                right.copyBounds(compoundRect);
1516                right.setCallback(this);
1517                dr.mDrawableSizeRight = compoundRect.width();
1518                dr.mDrawableHeightRight = compoundRect.height();
1519            } else {
1520                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1521            }
1522
1523            if (top != null) {
1524                top.setState(state);
1525                top.copyBounds(compoundRect);
1526                top.setCallback(this);
1527                dr.mDrawableSizeTop = compoundRect.height();
1528                dr.mDrawableWidthTop = compoundRect.width();
1529            } else {
1530                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1531            }
1532
1533            if (bottom != null) {
1534                bottom.setState(state);
1535                bottom.copyBounds(compoundRect);
1536                bottom.setCallback(this);
1537                dr.mDrawableSizeBottom = compoundRect.height();
1538                dr.mDrawableWidthBottom = compoundRect.width();
1539            } else {
1540                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1541            }
1542        }
1543
1544        invalidate();
1545        requestLayout();
1546    }
1547
1548    /**
1549     * Sets the Drawables (if any) to appear to the left of, above,
1550     * to the right of, and below the text.  Use 0 if you do not
1551     * want a Drawable there. The Drawables' bounds will be set to
1552     * their intrinsic bounds.
1553     *
1554     * @param left Resource identifier of the left Drawable.
1555     * @param top Resource identifier of the top Drawable.
1556     * @param right Resource identifier of the right Drawable.
1557     * @param bottom Resource identifier of the bottom Drawable.
1558     *
1559     * @attr ref android.R.styleable#TextView_drawableLeft
1560     * @attr ref android.R.styleable#TextView_drawableTop
1561     * @attr ref android.R.styleable#TextView_drawableRight
1562     * @attr ref android.R.styleable#TextView_drawableBottom
1563     */
1564    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1565        final Resources resources = getContext().getResources();
1566        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1567                top != 0 ? resources.getDrawable(top) : null,
1568                right != 0 ? resources.getDrawable(right) : null,
1569                bottom != 0 ? resources.getDrawable(bottom) : null);
1570    }
1571
1572    /**
1573     * Sets the Drawables (if any) to appear to the left of, above,
1574     * to the right of, and below the text.  Use null if you do not
1575     * want a Drawable there. The Drawables' bounds will be set to
1576     * their intrinsic bounds.
1577     *
1578     * @attr ref android.R.styleable#TextView_drawableLeft
1579     * @attr ref android.R.styleable#TextView_drawableTop
1580     * @attr ref android.R.styleable#TextView_drawableRight
1581     * @attr ref android.R.styleable#TextView_drawableBottom
1582     */
1583    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1584            Drawable right, Drawable bottom) {
1585
1586        if (left != null) {
1587            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1588        }
1589        if (right != null) {
1590            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1591        }
1592        if (top != null) {
1593            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1594        }
1595        if (bottom != null) {
1596            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1597        }
1598        setCompoundDrawables(left, top, right, bottom);
1599    }
1600
1601    /**
1602     * Returns drawables for the left, top, right, and bottom borders.
1603     */
1604    public Drawable[] getCompoundDrawables() {
1605        final Drawables dr = mDrawables;
1606        if (dr != null) {
1607            return new Drawable[] {
1608                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1609            };
1610        } else {
1611            return new Drawable[] { null, null, null, null };
1612        }
1613    }
1614
1615    /**
1616     * Sets the size of the padding between the compound drawables and
1617     * the text.
1618     *
1619     * @attr ref android.R.styleable#TextView_drawablePadding
1620     */
1621    public void setCompoundDrawablePadding(int pad) {
1622        Drawables dr = mDrawables;
1623        if (pad == 0) {
1624            if (dr != null) {
1625                dr.mDrawablePadding = pad;
1626            }
1627        } else {
1628            if (dr == null) {
1629                mDrawables = dr = new Drawables();
1630            }
1631            dr.mDrawablePadding = pad;
1632        }
1633
1634        invalidate();
1635        requestLayout();
1636    }
1637
1638    /**
1639     * Returns the padding between the compound drawables and the text.
1640     */
1641    public int getCompoundDrawablePadding() {
1642        final Drawables dr = mDrawables;
1643        return dr != null ? dr.mDrawablePadding : 0;
1644    }
1645
1646    @Override
1647    public void setPadding(int left, int top, int right, int bottom) {
1648        if (left != mPaddingLeft ||
1649            right != mPaddingRight ||
1650            top != mPaddingTop ||
1651            bottom != mPaddingBottom) {
1652            nullLayouts();
1653        }
1654
1655        // the super call will requestLayout()
1656        super.setPadding(left, top, right, bottom);
1657        invalidate();
1658    }
1659
1660    /**
1661     * Gets the autolink mask of the text.  See {@link
1662     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1663     * possible values.
1664     *
1665     * @attr ref android.R.styleable#TextView_autoLink
1666     */
1667    public final int getAutoLinkMask() {
1668        return mAutoLinkMask;
1669    }
1670
1671    /**
1672     * Sets the text color, size, style, hint color, and highlight color
1673     * from the specified TextAppearance resource.
1674     */
1675    public void setTextAppearance(Context context, int resid) {
1676        TypedArray appearance =
1677            context.obtainStyledAttributes(resid,
1678                                           com.android.internal.R.styleable.TextAppearance);
1679
1680        int color;
1681        ColorStateList colors;
1682        int ts;
1683
1684        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1685        if (color != 0) {
1686            setHighlightColor(color);
1687        }
1688
1689        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1690                                              TextAppearance_textColor);
1691        if (colors != null) {
1692            setTextColor(colors);
1693        }
1694
1695        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1696                                              TextAppearance_textSize, 0);
1697        if (ts != 0) {
1698            setRawTextSize(ts);
1699        }
1700
1701        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1702                                              TextAppearance_textColorHint);
1703        if (colors != null) {
1704            setHintTextColor(colors);
1705        }
1706
1707        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1708                                              TextAppearance_textColorLink);
1709        if (colors != null) {
1710            setLinkTextColor(colors);
1711        }
1712
1713        int typefaceIndex, styleIndex;
1714
1715        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1716                                          TextAppearance_typeface, -1);
1717        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1718                                       TextAppearance_textStyle, -1);
1719
1720        setTypefaceByIndex(typefaceIndex, styleIndex);
1721
1722        appearance.recycle();
1723    }
1724
1725    /**
1726     * @return the size (in pixels) of the default text size in this TextView.
1727     */
1728    public float getTextSize() {
1729        return mTextPaint.getTextSize();
1730    }
1731
1732    /**
1733     * Set the default text size to the given value, interpreted as "scaled
1734     * pixel" units.  This size is adjusted based on the current density and
1735     * user font size preference.
1736     *
1737     * @param size The scaled pixel size.
1738     *
1739     * @attr ref android.R.styleable#TextView_textSize
1740     */
1741    @android.view.RemotableViewMethod
1742    public void setTextSize(float size) {
1743        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1744    }
1745
1746    /**
1747     * Set the default text size to a given unit and value.  See {@link
1748     * TypedValue} for the possible dimension units.
1749     *
1750     * @param unit The desired dimension unit.
1751     * @param size The desired size in the given units.
1752     *
1753     * @attr ref android.R.styleable#TextView_textSize
1754     */
1755    public void setTextSize(int unit, float size) {
1756        Context c = getContext();
1757        Resources r;
1758
1759        if (c == null)
1760            r = Resources.getSystem();
1761        else
1762            r = c.getResources();
1763
1764        setRawTextSize(TypedValue.applyDimension(
1765            unit, size, r.getDisplayMetrics()));
1766    }
1767
1768    private void setRawTextSize(float size) {
1769        if (size != mTextPaint.getTextSize()) {
1770            mTextPaint.setTextSize(size);
1771
1772            if (mLayout != null) {
1773                nullLayouts();
1774                requestLayout();
1775                invalidate();
1776            }
1777        }
1778    }
1779
1780    /**
1781     * @return the extent by which text is currently being stretched
1782     * horizontally.  This will usually be 1.
1783     */
1784    public float getTextScaleX() {
1785        return mTextPaint.getTextScaleX();
1786    }
1787
1788    /**
1789     * Sets the extent by which text should be stretched horizontally.
1790     *
1791     * @attr ref android.R.styleable#TextView_textScaleX
1792     */
1793    @android.view.RemotableViewMethod
1794    public void setTextScaleX(float size) {
1795        if (size != mTextPaint.getTextScaleX()) {
1796            mUserSetTextScaleX = true;
1797            mTextPaint.setTextScaleX(size);
1798
1799            if (mLayout != null) {
1800                nullLayouts();
1801                requestLayout();
1802                invalidate();
1803            }
1804        }
1805    }
1806
1807    /**
1808     * Sets the typeface and style in which the text should be displayed.
1809     * Note that not all Typeface families actually have bold and italic
1810     * variants, so you may need to use
1811     * {@link #setTypeface(Typeface, int)} to get the appearance
1812     * that you actually want.
1813     *
1814     * @attr ref android.R.styleable#TextView_typeface
1815     * @attr ref android.R.styleable#TextView_textStyle
1816     */
1817    public void setTypeface(Typeface tf) {
1818        if (mTextPaint.getTypeface() != tf) {
1819            mTextPaint.setTypeface(tf);
1820
1821            if (mLayout != null) {
1822                nullLayouts();
1823                requestLayout();
1824                invalidate();
1825            }
1826        }
1827    }
1828
1829    /**
1830     * @return the current typeface and style in which the text is being
1831     * displayed.
1832     */
1833    public Typeface getTypeface() {
1834        return mTextPaint.getTypeface();
1835    }
1836
1837    /**
1838     * Sets the text color for all the states (normal, selected,
1839     * focused) to be this color.
1840     *
1841     * @attr ref android.R.styleable#TextView_textColor
1842     */
1843    @android.view.RemotableViewMethod
1844    public void setTextColor(int color) {
1845        mTextColor = ColorStateList.valueOf(color);
1846        updateTextColors();
1847    }
1848
1849    /**
1850     * Sets the text color.
1851     *
1852     * @attr ref android.R.styleable#TextView_textColor
1853     */
1854    public void setTextColor(ColorStateList colors) {
1855        if (colors == null) {
1856            throw new NullPointerException();
1857        }
1858
1859        mTextColor = colors;
1860        updateTextColors();
1861    }
1862
1863    /**
1864     * Return the set of text colors.
1865     *
1866     * @return Returns the set of text colors.
1867     */
1868    public final ColorStateList getTextColors() {
1869        return mTextColor;
1870    }
1871
1872    /**
1873     * <p>Return the current color selected for normal text.</p>
1874     *
1875     * @return Returns the current text color.
1876     */
1877    public final int getCurrentTextColor() {
1878        return mCurTextColor;
1879    }
1880
1881    /**
1882     * Sets the color used to display the selection highlight.
1883     *
1884     * @attr ref android.R.styleable#TextView_textColorHighlight
1885     */
1886    @android.view.RemotableViewMethod
1887    public void setHighlightColor(int color) {
1888        if (mHighlightColor != color) {
1889            mHighlightColor = color;
1890            invalidate();
1891        }
1892    }
1893
1894    /**
1895     * Gives the text a shadow of the specified radius and color, the specified
1896     * distance from its normal position.
1897     *
1898     * @attr ref android.R.styleable#TextView_shadowColor
1899     * @attr ref android.R.styleable#TextView_shadowDx
1900     * @attr ref android.R.styleable#TextView_shadowDy
1901     * @attr ref android.R.styleable#TextView_shadowRadius
1902     */
1903    public void setShadowLayer(float radius, float dx, float dy, int color) {
1904        mTextPaint.setShadowLayer(radius, dx, dy, color);
1905
1906        mShadowRadius = radius;
1907        mShadowDx = dx;
1908        mShadowDy = dy;
1909
1910        invalidate();
1911    }
1912
1913    /**
1914     * @return the base paint used for the text.  Please use this only to
1915     * consult the Paint's properties and not to change them.
1916     */
1917    public TextPaint getPaint() {
1918        return mTextPaint;
1919    }
1920
1921    /**
1922     * Sets the autolink mask of the text.  See {@link
1923     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1924     * possible values.
1925     *
1926     * @attr ref android.R.styleable#TextView_autoLink
1927     */
1928    @android.view.RemotableViewMethod
1929    public final void setAutoLinkMask(int mask) {
1930        mAutoLinkMask = mask;
1931    }
1932
1933    /**
1934     * Sets whether the movement method will automatically be set to
1935     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1936     * set to nonzero and links are detected in {@link #setText}.
1937     * The default is true.
1938     *
1939     * @attr ref android.R.styleable#TextView_linksClickable
1940     */
1941    @android.view.RemotableViewMethod
1942    public final void setLinksClickable(boolean whether) {
1943        mLinksClickable = whether;
1944    }
1945
1946    /**
1947     * Returns whether the movement method will automatically be set to
1948     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1949     * set to nonzero and links are detected in {@link #setText}.
1950     * The default is true.
1951     *
1952     * @attr ref android.R.styleable#TextView_linksClickable
1953     */
1954    public final boolean getLinksClickable() {
1955        return mLinksClickable;
1956    }
1957
1958    /**
1959     * Returns the list of URLSpans attached to the text
1960     * (by {@link Linkify} or otherwise) if any.  You can call
1961     * {@link URLSpan#getURL} on them to find where they link to
1962     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1963     * to find the region of the text they are attached to.
1964     */
1965    public URLSpan[] getUrls() {
1966        if (mText instanceof Spanned) {
1967            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1968        } else {
1969            return new URLSpan[0];
1970        }
1971    }
1972
1973    /**
1974     * Sets the color of the hint text.
1975     *
1976     * @attr ref android.R.styleable#TextView_textColorHint
1977     */
1978    @android.view.RemotableViewMethod
1979    public final void setHintTextColor(int color) {
1980        mHintTextColor = ColorStateList.valueOf(color);
1981        updateTextColors();
1982    }
1983
1984    /**
1985     * Sets the color of the hint text.
1986     *
1987     * @attr ref android.R.styleable#TextView_textColorHint
1988     */
1989    public final void setHintTextColor(ColorStateList colors) {
1990        mHintTextColor = colors;
1991        updateTextColors();
1992    }
1993
1994    /**
1995     * <p>Return the color used to paint the hint text.</p>
1996     *
1997     * @return Returns the list of hint text colors.
1998     */
1999    public final ColorStateList getHintTextColors() {
2000        return mHintTextColor;
2001    }
2002
2003    /**
2004     * <p>Return the current color selected to paint the hint text.</p>
2005     *
2006     * @return Returns the current hint text color.
2007     */
2008    public final int getCurrentHintTextColor() {
2009        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2010    }
2011
2012    /**
2013     * Sets the color of links in the text.
2014     *
2015     * @attr ref android.R.styleable#TextView_textColorLink
2016     */
2017    @android.view.RemotableViewMethod
2018    public final void setLinkTextColor(int color) {
2019        mLinkTextColor = ColorStateList.valueOf(color);
2020        updateTextColors();
2021    }
2022
2023    /**
2024     * Sets the color of links in the text.
2025     *
2026     * @attr ref android.R.styleable#TextView_textColorLink
2027     */
2028    public final void setLinkTextColor(ColorStateList colors) {
2029        mLinkTextColor = colors;
2030        updateTextColors();
2031    }
2032
2033    /**
2034     * <p>Returns the color used to paint links in the text.</p>
2035     *
2036     * @return Returns the list of link text colors.
2037     */
2038    public final ColorStateList getLinkTextColors() {
2039        return mLinkTextColor;
2040    }
2041
2042    /**
2043     * Sets the horizontal alignment of the text and the
2044     * vertical gravity that will be used when there is extra space
2045     * in the TextView beyond what is required for the text itself.
2046     *
2047     * @see android.view.Gravity
2048     * @attr ref android.R.styleable#TextView_gravity
2049     */
2050    public void setGravity(int gravity) {
2051        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
2052            gravity |= Gravity.LEFT;
2053        }
2054        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2055            gravity |= Gravity.TOP;
2056        }
2057
2058        boolean newLayout = false;
2059
2060        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
2061            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
2062            newLayout = true;
2063        }
2064
2065        if (gravity != mGravity) {
2066            invalidate();
2067        }
2068
2069        mGravity = gravity;
2070
2071        if (mLayout != null && newLayout) {
2072            // XXX this is heavy-handed because no actual content changes.
2073            int want = mLayout.getWidth();
2074            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2075
2076            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2077                          mRight - mLeft - getCompoundPaddingLeft() -
2078                          getCompoundPaddingRight(), true);
2079        }
2080    }
2081
2082    /**
2083     * Returns the horizontal and vertical alignment of this TextView.
2084     *
2085     * @see android.view.Gravity
2086     * @attr ref android.R.styleable#TextView_gravity
2087     */
2088    public int getGravity() {
2089        return mGravity;
2090    }
2091
2092    /**
2093     * @return the flags on the Paint being used to display the text.
2094     * @see Paint#getFlags
2095     */
2096    public int getPaintFlags() {
2097        return mTextPaint.getFlags();
2098    }
2099
2100    /**
2101     * Sets flags on the Paint being used to display the text and
2102     * reflows the text if they are different from the old flags.
2103     * @see Paint#setFlags
2104     */
2105    @android.view.RemotableViewMethod
2106    public void setPaintFlags(int flags) {
2107        if (mTextPaint.getFlags() != flags) {
2108            mTextPaint.setFlags(flags);
2109
2110            if (mLayout != null) {
2111                nullLayouts();
2112                requestLayout();
2113                invalidate();
2114            }
2115        }
2116    }
2117
2118    /**
2119     * Sets whether the text should be allowed to be wider than the
2120     * View is.  If false, it will be wrapped to the width of the View.
2121     *
2122     * @attr ref android.R.styleable#TextView_scrollHorizontally
2123     */
2124    public void setHorizontallyScrolling(boolean whether) {
2125        mHorizontallyScrolling = whether;
2126
2127        if (mLayout != null) {
2128            nullLayouts();
2129            requestLayout();
2130            invalidate();
2131        }
2132    }
2133
2134    /**
2135     * Makes the TextView at least this many lines tall.
2136     *
2137     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2138     * set this value to 1.
2139     *
2140     * @attr ref android.R.styleable#TextView_minLines
2141     */
2142    @android.view.RemotableViewMethod
2143    public void setMinLines(int minlines) {
2144        mMinimum = minlines;
2145        mMinMode = LINES;
2146
2147        requestLayout();
2148        invalidate();
2149    }
2150
2151    /**
2152     * Makes the TextView at least this many pixels tall.
2153     *
2154     * Setting this value overrides any other (minimum) number of lines setting.
2155     *
2156     * @attr ref android.R.styleable#TextView_minHeight
2157     */
2158    @android.view.RemotableViewMethod
2159    public void setMinHeight(int minHeight) {
2160        mMinimum = minHeight;
2161        mMinMode = PIXELS;
2162
2163        requestLayout();
2164        invalidate();
2165    }
2166
2167    /**
2168     * Makes the TextView at most this many lines tall.
2169     *
2170     * Setting this value overrides any other (maximum) height setting.
2171     *
2172     * @attr ref android.R.styleable#TextView_maxLines
2173     */
2174    @android.view.RemotableViewMethod
2175    public void setMaxLines(int maxlines) {
2176        mMaximum = maxlines;
2177        mMaxMode = LINES;
2178
2179        requestLayout();
2180        invalidate();
2181    }
2182
2183    /**
2184     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2185     * {@link #setMaxLines(int)} method.
2186     *
2187     * Setting this value overrides any other (maximum) number of lines setting.
2188     *
2189     * @attr ref android.R.styleable#TextView_maxHeight
2190     */
2191    @android.view.RemotableViewMethod
2192    public void setMaxHeight(int maxHeight) {
2193        mMaximum = maxHeight;
2194        mMaxMode = PIXELS;
2195
2196        requestLayout();
2197        invalidate();
2198    }
2199
2200    /**
2201     * Makes the TextView exactly this many lines tall.
2202     *
2203     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2204     * height setting. A single line TextView will set this value to 1.
2205     *
2206     * @attr ref android.R.styleable#TextView_lines
2207     */
2208    @android.view.RemotableViewMethod
2209    public void setLines(int lines) {
2210        mMaximum = mMinimum = lines;
2211        mMaxMode = mMinMode = LINES;
2212
2213        requestLayout();
2214        invalidate();
2215    }
2216
2217    /**
2218     * Makes the TextView exactly this many pixels tall.
2219     * You could do the same thing by specifying this number in the
2220     * LayoutParams.
2221     *
2222     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2223     * height setting.
2224     *
2225     * @attr ref android.R.styleable#TextView_height
2226     */
2227    @android.view.RemotableViewMethod
2228    public void setHeight(int pixels) {
2229        mMaximum = mMinimum = pixels;
2230        mMaxMode = mMinMode = PIXELS;
2231
2232        requestLayout();
2233        invalidate();
2234    }
2235
2236    /**
2237     * Makes the TextView at least this many ems wide
2238     *
2239     * @attr ref android.R.styleable#TextView_minEms
2240     */
2241    @android.view.RemotableViewMethod
2242    public void setMinEms(int minems) {
2243        mMinWidth = minems;
2244        mMinWidthMode = EMS;
2245
2246        requestLayout();
2247        invalidate();
2248    }
2249
2250    /**
2251     * Makes the TextView at least this many pixels wide
2252     *
2253     * @attr ref android.R.styleable#TextView_minWidth
2254     */
2255    @android.view.RemotableViewMethod
2256    public void setMinWidth(int minpixels) {
2257        mMinWidth = minpixels;
2258        mMinWidthMode = PIXELS;
2259
2260        requestLayout();
2261        invalidate();
2262    }
2263
2264    /**
2265     * Makes the TextView at most this many ems wide
2266     *
2267     * @attr ref android.R.styleable#TextView_maxEms
2268     */
2269    @android.view.RemotableViewMethod
2270    public void setMaxEms(int maxems) {
2271        mMaxWidth = maxems;
2272        mMaxWidthMode = EMS;
2273
2274        requestLayout();
2275        invalidate();
2276    }
2277
2278    /**
2279     * Makes the TextView at most this many pixels wide
2280     *
2281     * @attr ref android.R.styleable#TextView_maxWidth
2282     */
2283    @android.view.RemotableViewMethod
2284    public void setMaxWidth(int maxpixels) {
2285        mMaxWidth = maxpixels;
2286        mMaxWidthMode = PIXELS;
2287
2288        requestLayout();
2289        invalidate();
2290    }
2291
2292    /**
2293     * Makes the TextView exactly this many ems wide
2294     *
2295     * @attr ref android.R.styleable#TextView_ems
2296     */
2297    @android.view.RemotableViewMethod
2298    public void setEms(int ems) {
2299        mMaxWidth = mMinWidth = ems;
2300        mMaxWidthMode = mMinWidthMode = EMS;
2301
2302        requestLayout();
2303        invalidate();
2304    }
2305
2306    /**
2307     * Makes the TextView exactly this many pixels wide.
2308     * You could do the same thing by specifying this number in the
2309     * LayoutParams.
2310     *
2311     * @attr ref android.R.styleable#TextView_width
2312     */
2313    @android.view.RemotableViewMethod
2314    public void setWidth(int pixels) {
2315        mMaxWidth = mMinWidth = pixels;
2316        mMaxWidthMode = mMinWidthMode = PIXELS;
2317
2318        requestLayout();
2319        invalidate();
2320    }
2321
2322
2323    /**
2324     * Sets line spacing for this TextView.  Each line will have its height
2325     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2326     *
2327     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2328     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2329     */
2330    public void setLineSpacing(float add, float mult) {
2331        mSpacingMult = mult;
2332        mSpacingAdd = add;
2333
2334        if (mLayout != null) {
2335            nullLayouts();
2336            requestLayout();
2337            invalidate();
2338        }
2339    }
2340
2341    /**
2342     * Convenience method: Append the specified text to the TextView's
2343     * display buffer, upgrading it to BufferType.EDITABLE if it was
2344     * not already editable.
2345     */
2346    public final void append(CharSequence text) {
2347        append(text, 0, text.length());
2348    }
2349
2350    /**
2351     * Convenience method: Append the specified text slice to the TextView's
2352     * display buffer, upgrading it to BufferType.EDITABLE if it was
2353     * not already editable.
2354     */
2355    public void append(CharSequence text, int start, int end) {
2356        if (!(mText instanceof Editable)) {
2357            setText(mText, BufferType.EDITABLE);
2358        }
2359
2360        ((Editable) mText).append(text, start, end);
2361    }
2362
2363    private void updateTextColors() {
2364        boolean inval = false;
2365        int color = mTextColor.getColorForState(getDrawableState(), 0);
2366        if (color != mCurTextColor) {
2367            mCurTextColor = color;
2368            inval = true;
2369        }
2370        if (mLinkTextColor != null) {
2371            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2372            if (color != mTextPaint.linkColor) {
2373                mTextPaint.linkColor = color;
2374                inval = true;
2375            }
2376        }
2377        if (mHintTextColor != null) {
2378            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2379            if (color != mCurHintTextColor && mText.length() == 0) {
2380                mCurHintTextColor = color;
2381                inval = true;
2382            }
2383        }
2384        if (inval) {
2385            invalidate();
2386        }
2387    }
2388
2389    @Override
2390    protected void drawableStateChanged() {
2391        super.drawableStateChanged();
2392        if (mTextColor != null && mTextColor.isStateful()
2393                || (mHintTextColor != null && mHintTextColor.isStateful())
2394                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2395            updateTextColors();
2396        }
2397
2398        final Drawables dr = mDrawables;
2399        if (dr != null) {
2400            int[] state = getDrawableState();
2401            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2402                dr.mDrawableTop.setState(state);
2403            }
2404            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2405                dr.mDrawableBottom.setState(state);
2406            }
2407            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2408                dr.mDrawableLeft.setState(state);
2409            }
2410            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2411                dr.mDrawableRight.setState(state);
2412            }
2413        }
2414    }
2415
2416    /**
2417     * User interface state that is stored by TextView for implementing
2418     * {@link View#onSaveInstanceState}.
2419     */
2420    public static class SavedState extends BaseSavedState {
2421        int selStart;
2422        int selEnd;
2423        CharSequence text;
2424        boolean frozenWithFocus;
2425        CharSequence error;
2426
2427        SavedState(Parcelable superState) {
2428            super(superState);
2429        }
2430
2431        @Override
2432        public void writeToParcel(Parcel out, int flags) {
2433            super.writeToParcel(out, flags);
2434            out.writeInt(selStart);
2435            out.writeInt(selEnd);
2436            out.writeInt(frozenWithFocus ? 1 : 0);
2437            TextUtils.writeToParcel(text, out, flags);
2438
2439            if (error == null) {
2440                out.writeInt(0);
2441            } else {
2442                out.writeInt(1);
2443                TextUtils.writeToParcel(error, out, flags);
2444            }
2445        }
2446
2447        @Override
2448        public String toString() {
2449            String str = "TextView.SavedState{"
2450                    + Integer.toHexString(System.identityHashCode(this))
2451                    + " start=" + selStart + " end=" + selEnd;
2452            if (text != null) {
2453                str += " text=" + text;
2454            }
2455            return str + "}";
2456        }
2457
2458        @SuppressWarnings("hiding")
2459        public static final Parcelable.Creator<SavedState> CREATOR
2460                = new Parcelable.Creator<SavedState>() {
2461            public SavedState createFromParcel(Parcel in) {
2462                return new SavedState(in);
2463            }
2464
2465            public SavedState[] newArray(int size) {
2466                return new SavedState[size];
2467            }
2468        };
2469
2470        private SavedState(Parcel in) {
2471            super(in);
2472            selStart = in.readInt();
2473            selEnd = in.readInt();
2474            frozenWithFocus = (in.readInt() != 0);
2475            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2476
2477            if (in.readInt() != 0) {
2478                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2479            }
2480        }
2481    }
2482
2483    @Override
2484    public Parcelable onSaveInstanceState() {
2485        Parcelable superState = super.onSaveInstanceState();
2486
2487        // Save state if we are forced to
2488        boolean save = mFreezesText;
2489        int start = 0;
2490        int end = 0;
2491
2492        if (mText != null) {
2493            start = getSelectionStart();
2494            end = getSelectionEnd();
2495            if (start >= 0 || end >= 0) {
2496                // Or save state if there is a selection
2497                save = true;
2498            }
2499        }
2500
2501        if (save) {
2502            SavedState ss = new SavedState(superState);
2503            // XXX Should also save the current scroll position!
2504            ss.selStart = start;
2505            ss.selEnd = end;
2506
2507            if (mText instanceof Spanned) {
2508                /*
2509                 * Calling setText() strips off any ChangeWatchers;
2510                 * strip them now to avoid leaking references.
2511                 * But do it to a copy so that if there are any
2512                 * further changes to the text of this view, it
2513                 * won't get into an inconsistent state.
2514                 */
2515
2516                Spannable sp = new SpannableString(mText);
2517
2518                for (ChangeWatcher cw :
2519                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2520                    sp.removeSpan(cw);
2521                }
2522
2523                ss.text = sp;
2524            } else {
2525                ss.text = mText.toString();
2526            }
2527
2528            if (isFocused() && start >= 0 && end >= 0) {
2529                ss.frozenWithFocus = true;
2530            }
2531
2532            ss.error = mError;
2533
2534            return ss;
2535        }
2536
2537        return superState;
2538    }
2539
2540    @Override
2541    public void onRestoreInstanceState(Parcelable state) {
2542        if (!(state instanceof SavedState)) {
2543            super.onRestoreInstanceState(state);
2544            return;
2545        }
2546
2547        SavedState ss = (SavedState)state;
2548        super.onRestoreInstanceState(ss.getSuperState());
2549
2550        // XXX restore buffer type too, as well as lots of other stuff
2551        if (ss.text != null) {
2552            setText(ss.text);
2553        }
2554
2555        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2556            if (mText instanceof Spannable) {
2557                int len = mText.length();
2558
2559                if (ss.selStart > len || ss.selEnd > len) {
2560                    String restored = "";
2561
2562                    if (ss.text != null) {
2563                        restored = "(restored) ";
2564                    }
2565
2566                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2567                          "/" + ss.selEnd + " out of range for " + restored +
2568                          "text " + mText);
2569                } else {
2570                    Selection.setSelection((Spannable) mText, ss.selStart,
2571                                           ss.selEnd);
2572
2573                    if (ss.frozenWithFocus) {
2574                        mFrozenWithFocus = true;
2575                    }
2576                }
2577            }
2578        }
2579
2580        if (ss.error != null) {
2581            final CharSequence error = ss.error;
2582            // Display the error later, after the first layout pass
2583            post(new Runnable() {
2584                public void run() {
2585                    setError(error);
2586                }
2587            });
2588        }
2589    }
2590
2591    /**
2592     * Control whether this text view saves its entire text contents when
2593     * freezing to an icicle, in addition to dynamic state such as cursor
2594     * position.  By default this is false, not saving the text.  Set to true
2595     * if the text in the text view is not being saved somewhere else in
2596     * persistent storage (such as in a content provider) so that if the
2597     * view is later thawed the user will not lose their data.
2598     *
2599     * @param freezesText Controls whether a frozen icicle should include the
2600     * entire text data: true to include it, false to not.
2601     *
2602     * @attr ref android.R.styleable#TextView_freezesText
2603     */
2604    @android.view.RemotableViewMethod
2605    public void setFreezesText(boolean freezesText) {
2606        mFreezesText = freezesText;
2607    }
2608
2609    /**
2610     * Return whether this text view is including its entire text contents
2611     * in frozen icicles.
2612     *
2613     * @return Returns true if text is included, false if it isn't.
2614     *
2615     * @see #setFreezesText
2616     */
2617    public boolean getFreezesText() {
2618        return mFreezesText;
2619    }
2620
2621    ///////////////////////////////////////////////////////////////////////////
2622
2623    /**
2624     * Sets the Factory used to create new Editables.
2625     */
2626    public final void setEditableFactory(Editable.Factory factory) {
2627        mEditableFactory = factory;
2628        setText(mText);
2629    }
2630
2631    /**
2632     * Sets the Factory used to create new Spannables.
2633     */
2634    public final void setSpannableFactory(Spannable.Factory factory) {
2635        mSpannableFactory = factory;
2636        setText(mText);
2637    }
2638
2639    /**
2640     * Sets the string value of the TextView. TextView <em>does not</em> accept
2641     * HTML-like formatting, which you can do with text strings in XML resource files.
2642     * To style your strings, attach android.text.style.* objects to a
2643     * {@link android.text.SpannableString SpannableString}, or see the
2644     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2645     * Available Resource Types</a> documentation for an example of setting
2646     * formatted text in the XML resource file.
2647     *
2648     * @attr ref android.R.styleable#TextView_text
2649     */
2650    @android.view.RemotableViewMethod
2651    public final void setText(CharSequence text) {
2652        setText(text, mBufferType);
2653    }
2654
2655    /**
2656     * Like {@link #setText(CharSequence)},
2657     * except that the cursor position (if any) is retained in the new text.
2658     *
2659     * @param text The new text to place in the text view.
2660     *
2661     * @see #setText(CharSequence)
2662     */
2663    @android.view.RemotableViewMethod
2664    public final void setTextKeepState(CharSequence text) {
2665        setTextKeepState(text, mBufferType);
2666    }
2667
2668    /**
2669     * Sets the text that this TextView is to display (see
2670     * {@link #setText(CharSequence)}) and also sets whether it is stored
2671     * in a styleable/spannable buffer and whether it is editable.
2672     *
2673     * @attr ref android.R.styleable#TextView_text
2674     * @attr ref android.R.styleable#TextView_bufferType
2675     */
2676    public void setText(CharSequence text, BufferType type) {
2677        setText(text, type, true, 0);
2678
2679        if (mCharWrapper != null) {
2680            mCharWrapper.mChars = null;
2681        }
2682    }
2683
2684    private void setText(CharSequence text, BufferType type,
2685                         boolean notifyBefore, int oldlen) {
2686        if (text == null) {
2687            text = "";
2688        }
2689
2690        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2691
2692        if (text instanceof Spanned &&
2693            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2694            setHorizontalFadingEdgeEnabled(true);
2695            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2696        }
2697
2698        int n = mFilters.length;
2699        for (int i = 0; i < n; i++) {
2700            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2701                                                  EMPTY_SPANNED, 0, 0);
2702            if (out != null) {
2703                text = out;
2704            }
2705        }
2706
2707        if (notifyBefore) {
2708            if (mText != null) {
2709                oldlen = mText.length();
2710                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2711            } else {
2712                sendBeforeTextChanged("", 0, 0, text.length());
2713            }
2714        }
2715
2716        boolean needEditableForNotification = false;
2717
2718        if (mListeners != null && mListeners.size() != 0) {
2719            needEditableForNotification = true;
2720        }
2721
2722        if (type == BufferType.EDITABLE || mInput != null ||
2723            needEditableForNotification) {
2724            Editable t = mEditableFactory.newEditable(text);
2725            text = t;
2726            setFilters(t, mFilters);
2727            InputMethodManager imm = InputMethodManager.peekInstance();
2728            if (imm != null) imm.restartInput(this);
2729        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2730            text = mSpannableFactory.newSpannable(text);
2731        } else if (!(text instanceof CharWrapper)) {
2732            text = TextUtils.stringOrSpannedString(text);
2733        }
2734
2735        if (mAutoLinkMask != 0) {
2736            Spannable s2;
2737
2738            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2739                s2 = (Spannable) text;
2740            } else {
2741                s2 = mSpannableFactory.newSpannable(text);
2742            }
2743
2744            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2745                text = s2;
2746                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2747
2748                /*
2749                 * We must go ahead and set the text before changing the
2750                 * movement method, because setMovementMethod() may call
2751                 * setText() again to try to upgrade the buffer type.
2752                 */
2753                mText = text;
2754
2755                // Do not change the movement method for text that support text selection as it
2756                // would prevent an arbitrary cursor displacement.
2757                final boolean hasTextSelection = this instanceof EditText || mTextIsSelectable;
2758                if (mLinksClickable && !hasTextSelection) {
2759                    setMovementMethod(LinkMovementMethod.getInstance());
2760                }
2761            }
2762        }
2763
2764        mBufferType = type;
2765        mText = text;
2766
2767        if (mTransformation == null)
2768            mTransformed = text;
2769        else
2770            mTransformed = mTransformation.getTransformation(text, this);
2771
2772        final int textLength = text.length();
2773
2774        if (text instanceof Spannable) {
2775            Spannable sp = (Spannable) text;
2776
2777            // Remove any ChangeWatchers that might have come
2778            // from other TextViews.
2779            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2780            final int count = watchers.length;
2781            for (int i = 0; i < count; i++)
2782                sp.removeSpan(watchers[i]);
2783
2784            if (mChangeWatcher == null)
2785                mChangeWatcher = new ChangeWatcher();
2786
2787            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2788                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2789
2790            if (mInput != null) {
2791                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2792            }
2793
2794            if (mTransformation != null) {
2795                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2796
2797            }
2798
2799            if (mMovement != null) {
2800                mMovement.initialize(this, (Spannable) text);
2801
2802                /*
2803                 * Initializing the movement method will have set the
2804                 * selection, so reset mSelectionMoved to keep that from
2805                 * interfering with the normal on-focus selection-setting.
2806                 */
2807                mSelectionMoved = false;
2808            }
2809        }
2810
2811        if (mLayout != null) {
2812            checkForRelayout();
2813        }
2814
2815        sendOnTextChanged(text, 0, oldlen, textLength);
2816        onTextChanged(text, 0, oldlen, textLength);
2817
2818        if (needEditableForNotification) {
2819            sendAfterTextChanged((Editable) text);
2820        }
2821
2822        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
2823        prepareCursorControllers();
2824    }
2825
2826    /**
2827     * Sets the TextView to display the specified slice of the specified
2828     * char array.  You must promise that you will not change the contents
2829     * of the array except for right before another call to setText(),
2830     * since the TextView has no way to know that the text
2831     * has changed and that it needs to invalidate and re-layout.
2832     */
2833    public final void setText(char[] text, int start, int len) {
2834        int oldlen = 0;
2835
2836        if (start < 0 || len < 0 || start + len > text.length) {
2837            throw new IndexOutOfBoundsException(start + ", " + len);
2838        }
2839
2840        /*
2841         * We must do the before-notification here ourselves because if
2842         * the old text is a CharWrapper we destroy it before calling
2843         * into the normal path.
2844         */
2845        if (mText != null) {
2846            oldlen = mText.length();
2847            sendBeforeTextChanged(mText, 0, oldlen, len);
2848        } else {
2849            sendBeforeTextChanged("", 0, 0, len);
2850        }
2851
2852        if (mCharWrapper == null) {
2853            mCharWrapper = new CharWrapper(text, start, len);
2854        } else {
2855            mCharWrapper.set(text, start, len);
2856        }
2857
2858        setText(mCharWrapper, mBufferType, false, oldlen);
2859    }
2860
2861    private static class CharWrapper
2862            implements CharSequence, GetChars, GraphicsOperations {
2863        private char[] mChars;
2864        private int mStart, mLength;
2865
2866        public CharWrapper(char[] chars, int start, int len) {
2867            mChars = chars;
2868            mStart = start;
2869            mLength = len;
2870        }
2871
2872        /* package */ void set(char[] chars, int start, int len) {
2873            mChars = chars;
2874            mStart = start;
2875            mLength = len;
2876        }
2877
2878        public int length() {
2879            return mLength;
2880        }
2881
2882        public char charAt(int off) {
2883            return mChars[off + mStart];
2884        }
2885
2886        @Override
2887        public String toString() {
2888            return new String(mChars, mStart, mLength);
2889        }
2890
2891        public CharSequence subSequence(int start, int end) {
2892            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2893                throw new IndexOutOfBoundsException(start + ", " + end);
2894            }
2895
2896            return new String(mChars, start + mStart, end - start);
2897        }
2898
2899        public void getChars(int start, int end, char[] buf, int off) {
2900            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2901                throw new IndexOutOfBoundsException(start + ", " + end);
2902            }
2903
2904            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2905        }
2906
2907        public void drawText(Canvas c, int start, int end,
2908                             float x, float y, Paint p) {
2909            c.drawText(mChars, start + mStart, end - start, x, y, p);
2910        }
2911
2912        public void drawTextRun(Canvas c, int start, int end,
2913                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
2914            int count = end - start;
2915            int contextCount = contextEnd - contextStart;
2916            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
2917                    contextCount, x, y, flags, p);
2918        }
2919
2920        public float measureText(int start, int end, Paint p) {
2921            return p.measureText(mChars, start + mStart, end - start);
2922        }
2923
2924        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2925            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2926        }
2927
2928        public float getTextRunAdvances(int start, int end, int contextStart,
2929                int contextEnd, int flags, float[] advances, int advancesIndex,
2930                Paint p) {
2931            int count = end - start;
2932            int contextCount = contextEnd - contextStart;
2933            return p.getTextRunAdvances(mChars, start + mStart, count,
2934                    contextStart + mStart, contextCount, flags, advances,
2935                    advancesIndex);
2936        }
2937
2938        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
2939                int offset, int cursorOpt, Paint p) {
2940            int contextCount = contextEnd - contextStart;
2941            return p.getTextRunCursor(mChars, contextStart + mStart,
2942                    contextCount, flags, offset + mStart, cursorOpt);
2943        }
2944    }
2945
2946    /**
2947     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2948     * except that the cursor position (if any) is retained in the new text.
2949     *
2950     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2951     */
2952    public final void setTextKeepState(CharSequence text, BufferType type) {
2953        int start = getSelectionStart();
2954        int end = getSelectionEnd();
2955        int len = text.length();
2956
2957        setText(text, type);
2958
2959        if (start >= 0 || end >= 0) {
2960            if (mText instanceof Spannable) {
2961                Selection.setSelection((Spannable) mText,
2962                                       Math.max(0, Math.min(start, len)),
2963                                       Math.max(0, Math.min(end, len)));
2964            }
2965        }
2966    }
2967
2968    @android.view.RemotableViewMethod
2969    public final void setText(int resid) {
2970        setText(getContext().getResources().getText(resid));
2971    }
2972
2973    public final void setText(int resid, BufferType type) {
2974        setText(getContext().getResources().getText(resid), type);
2975    }
2976
2977    /**
2978     * Sets the text to be displayed when the text of the TextView is empty.
2979     * Null means to use the normal empty text. The hint does not currently
2980     * participate in determining the size of the view.
2981     *
2982     * @attr ref android.R.styleable#TextView_hint
2983     */
2984    @android.view.RemotableViewMethod
2985    public final void setHint(CharSequence hint) {
2986        mHint = TextUtils.stringOrSpannedString(hint);
2987
2988        if (mLayout != null) {
2989            checkForRelayout();
2990        }
2991
2992        if (mText.length() == 0) {
2993            invalidate();
2994        }
2995    }
2996
2997    /**
2998     * Sets the text to be displayed when the text of the TextView is empty,
2999     * from a resource.
3000     *
3001     * @attr ref android.R.styleable#TextView_hint
3002     */
3003    @android.view.RemotableViewMethod
3004    public final void setHint(int resid) {
3005        setHint(getContext().getResources().getText(resid));
3006    }
3007
3008    /**
3009     * Returns the hint that is displayed when the text of the TextView
3010     * is empty.
3011     *
3012     * @attr ref android.R.styleable#TextView_hint
3013     */
3014    @ViewDebug.CapturedViewProperty
3015    public CharSequence getHint() {
3016        return mHint;
3017    }
3018
3019    private boolean isMultilineInputType(int type) {
3020        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3021            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3022    }
3023
3024    /**
3025     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3026     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3027     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3028     * then a soft keyboard will not be displayed for this text view.
3029     *
3030     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3031     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3032     * type.
3033     *
3034     * @see #getInputType()
3035     * @see #setRawInputType(int)
3036     * @see android.text.InputType
3037     * @attr ref android.R.styleable#TextView_inputType
3038     */
3039    public void setInputType(int type) {
3040        final boolean wasPassword = isPasswordInputType(mInputType);
3041        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3042        setInputType(type, false);
3043        final boolean isPassword = isPasswordInputType(type);
3044        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3045        boolean forceUpdate = false;
3046        if (isPassword) {
3047            setTransformationMethod(PasswordTransformationMethod.getInstance());
3048            setTypefaceByIndex(MONOSPACE, 0);
3049        } else if (isVisiblePassword) {
3050            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3051                forceUpdate = true;
3052            }
3053            setTypefaceByIndex(MONOSPACE, 0);
3054        } else if (wasPassword || wasVisiblePassword) {
3055            // not in password mode, clean up typeface and transformation
3056            setTypefaceByIndex(-1, -1);
3057            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3058                forceUpdate = true;
3059            }
3060        }
3061
3062        boolean singleLine = !isMultilineInputType(type);
3063
3064        // We need to update the single line mode if it has changed or we
3065        // were previously in password mode.
3066        if (mSingleLine != singleLine || forceUpdate) {
3067            // Change single line mode, but only change the transformation if
3068            // we are not in password mode.
3069            applySingleLine(singleLine, !isPassword, true);
3070        }
3071
3072        InputMethodManager imm = InputMethodManager.peekInstance();
3073        if (imm != null) imm.restartInput(this);
3074    }
3075
3076    /**
3077     * It would be better to rely on the input type for everything. A password inputType should have
3078     * a password transformation. We should hence use isPasswordInputType instead of this method.
3079     *
3080     * We should:
3081     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3082     * would install the correct transformation).
3083     * - Refuse the installation of a non-password transformation in setTransformation if the input
3084     * type is password.
3085     *
3086     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3087     * is useful since it matches what the user can see (obfuscated text or not).
3088     *
3089     * @return true if the current transformation method is of the password type.
3090     */
3091    private boolean hasPasswordTransformationMethod() {
3092        return mTransformation instanceof PasswordTransformationMethod;
3093    }
3094
3095    private boolean isPasswordInputType(int inputType) {
3096        final int variation =
3097                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3098        return variation
3099                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3100                || variation
3101                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3102                || variation
3103                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3104    }
3105
3106    private boolean isVisiblePasswordInputType(int inputType) {
3107        final int variation =
3108                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3109        return variation
3110                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3111    }
3112
3113    /**
3114     * Directly change the content type integer of the text view, without
3115     * modifying any other state.
3116     * @see #setInputType(int)
3117     * @see android.text.InputType
3118     * @attr ref android.R.styleable#TextView_inputType
3119     */
3120    public void setRawInputType(int type) {
3121        mInputType = type;
3122    }
3123
3124    private void setInputType(int type, boolean direct) {
3125        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3126        KeyListener input;
3127        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3128            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3129            TextKeyListener.Capitalize cap;
3130            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3131                cap = TextKeyListener.Capitalize.CHARACTERS;
3132            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3133                cap = TextKeyListener.Capitalize.WORDS;
3134            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3135                cap = TextKeyListener.Capitalize.SENTENCES;
3136            } else {
3137                cap = TextKeyListener.Capitalize.NONE;
3138            }
3139            input = TextKeyListener.getInstance(autotext, cap);
3140        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3141            input = DigitsKeyListener.getInstance(
3142                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3143                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3144        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3145            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3146                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3147                    input = DateKeyListener.getInstance();
3148                    break;
3149                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3150                    input = TimeKeyListener.getInstance();
3151                    break;
3152                default:
3153                    input = DateTimeKeyListener.getInstance();
3154                    break;
3155            }
3156        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3157            input = DialerKeyListener.getInstance();
3158        } else {
3159            input = TextKeyListener.getInstance();
3160        }
3161        setRawInputType(type);
3162        if (direct) mInput = input;
3163        else {
3164            setKeyListenerOnly(input);
3165        }
3166    }
3167
3168    /**
3169     * Get the type of the content.
3170     *
3171     * @see #setInputType(int)
3172     * @see android.text.InputType
3173     */
3174    public int getInputType() {
3175        return mInputType;
3176    }
3177
3178    /**
3179     * Change the editor type integer associated with the text view, which
3180     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3181     * has focus.
3182     * @see #getImeOptions
3183     * @see android.view.inputmethod.EditorInfo
3184     * @attr ref android.R.styleable#TextView_imeOptions
3185     */
3186    public void setImeOptions(int imeOptions) {
3187        if (mInputContentType == null) {
3188            mInputContentType = new InputContentType();
3189        }
3190        mInputContentType.imeOptions = imeOptions;
3191    }
3192
3193    /**
3194     * Get the type of the IME editor.
3195     *
3196     * @see #setImeOptions(int)
3197     * @see android.view.inputmethod.EditorInfo
3198     */
3199    public int getImeOptions() {
3200        return mInputContentType != null
3201                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3202    }
3203
3204    /**
3205     * Change the custom IME action associated with the text view, which
3206     * will be reported to an IME with {@link EditorInfo#actionLabel}
3207     * and {@link EditorInfo#actionId} when it has focus.
3208     * @see #getImeActionLabel
3209     * @see #getImeActionId
3210     * @see android.view.inputmethod.EditorInfo
3211     * @attr ref android.R.styleable#TextView_imeActionLabel
3212     * @attr ref android.R.styleable#TextView_imeActionId
3213     */
3214    public void setImeActionLabel(CharSequence label, int actionId) {
3215        if (mInputContentType == null) {
3216            mInputContentType = new InputContentType();
3217        }
3218        mInputContentType.imeActionLabel = label;
3219        mInputContentType.imeActionId = actionId;
3220    }
3221
3222    /**
3223     * Get the IME action label previous set with {@link #setImeActionLabel}.
3224     *
3225     * @see #setImeActionLabel
3226     * @see android.view.inputmethod.EditorInfo
3227     */
3228    public CharSequence getImeActionLabel() {
3229        return mInputContentType != null
3230                ? mInputContentType.imeActionLabel : null;
3231    }
3232
3233    /**
3234     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3235     *
3236     * @see #setImeActionLabel
3237     * @see android.view.inputmethod.EditorInfo
3238     */
3239    public int getImeActionId() {
3240        return mInputContentType != null
3241                ? mInputContentType.imeActionId : 0;
3242    }
3243
3244    /**
3245     * Set a special listener to be called when an action is performed
3246     * on the text view.  This will be called when the enter key is pressed,
3247     * or when an action supplied to the IME is selected by the user.  Setting
3248     * this means that the normal hard key event will not insert a newline
3249     * into the text view, even if it is multi-line; holding down the ALT
3250     * modifier will, however, allow the user to insert a newline character.
3251     */
3252    public void setOnEditorActionListener(OnEditorActionListener l) {
3253        if (mInputContentType == null) {
3254            mInputContentType = new InputContentType();
3255        }
3256        mInputContentType.onEditorActionListener = l;
3257    }
3258
3259    /**
3260     * Called when an attached input method calls
3261     * {@link InputConnection#performEditorAction(int)
3262     * InputConnection.performEditorAction()}
3263     * for this text view.  The default implementation will call your action
3264     * listener supplied to {@link #setOnEditorActionListener}, or perform
3265     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3266     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3267     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3268     * EditorInfo.IME_ACTION_DONE}.
3269     *
3270     * <p>For backwards compatibility, if no IME options have been set and the
3271     * text view would not normally advance focus on enter, then
3272     * the NEXT and DONE actions received here will be turned into an enter
3273     * key down/up pair to go through the normal key handling.
3274     *
3275     * @param actionCode The code of the action being performed.
3276     *
3277     * @see #setOnEditorActionListener
3278     */
3279    public void onEditorAction(int actionCode) {
3280        final InputContentType ict = mInputContentType;
3281        if (ict != null) {
3282            if (ict.onEditorActionListener != null) {
3283                if (ict.onEditorActionListener.onEditorAction(this,
3284                        actionCode, null)) {
3285                    return;
3286                }
3287            }
3288
3289            // This is the handling for some default action.
3290            // Note that for backwards compatibility we don't do this
3291            // default handling if explicit ime options have not been given,
3292            // instead turning this into the normal enter key codes that an
3293            // app may be expecting.
3294            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3295                View v = focusSearch(FOCUS_DOWN);
3296                if (v != null) {
3297                    if (!v.requestFocus(FOCUS_DOWN)) {
3298                        throw new IllegalStateException("focus search returned a view " +
3299                                "that wasn't able to take focus!");
3300                    }
3301                }
3302                return;
3303
3304            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3305                View v = focusSearch(FOCUS_UP);
3306                if (v != null) {
3307                    if (!v.requestFocus(FOCUS_UP)) {
3308                        throw new IllegalStateException("focus search returned a view " +
3309                                "that wasn't able to take focus!");
3310                    }
3311                }
3312                return;
3313
3314            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3315                InputMethodManager imm = InputMethodManager.peekInstance();
3316                if (imm != null) {
3317                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3318                }
3319                return;
3320            }
3321        }
3322
3323        Handler h = getHandler();
3324        if (h != null) {
3325            long eventTime = SystemClock.uptimeMillis();
3326            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3327                    new KeyEvent(eventTime, eventTime,
3328                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3329                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3330                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3331                    | KeyEvent.FLAG_EDITOR_ACTION)));
3332            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3333                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3334                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3335                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3336                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3337                    | KeyEvent.FLAG_EDITOR_ACTION)));
3338        }
3339    }
3340
3341    /**
3342     * Set the private content type of the text, which is the
3343     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3344     * field that will be filled in when creating an input connection.
3345     *
3346     * @see #getPrivateImeOptions()
3347     * @see EditorInfo#privateImeOptions
3348     * @attr ref android.R.styleable#TextView_privateImeOptions
3349     */
3350    public void setPrivateImeOptions(String type) {
3351        if (mInputContentType == null) mInputContentType = new InputContentType();
3352        mInputContentType.privateImeOptions = type;
3353    }
3354
3355    /**
3356     * Get the private type of the content.
3357     *
3358     * @see #setPrivateImeOptions(String)
3359     * @see EditorInfo#privateImeOptions
3360     */
3361    public String getPrivateImeOptions() {
3362        return mInputContentType != null
3363                ? mInputContentType.privateImeOptions : null;
3364    }
3365
3366    /**
3367     * Set the extra input data of the text, which is the
3368     * {@link EditorInfo#extras TextBoxAttribute.extras}
3369     * Bundle that will be filled in when creating an input connection.  The
3370     * given integer is the resource ID of an XML resource holding an
3371     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3372     *
3373     * @see #getInputExtras(boolean)
3374     * @see EditorInfo#extras
3375     * @attr ref android.R.styleable#TextView_editorExtras
3376     */
3377    public void setInputExtras(int xmlResId)
3378            throws XmlPullParserException, IOException {
3379        XmlResourceParser parser = getResources().getXml(xmlResId);
3380        if (mInputContentType == null) mInputContentType = new InputContentType();
3381        mInputContentType.extras = new Bundle();
3382        getResources().parseBundleExtras(parser, mInputContentType.extras);
3383    }
3384
3385    /**
3386     * Retrieve the input extras currently associated with the text view, which
3387     * can be viewed as well as modified.
3388     *
3389     * @param create If true, the extras will be created if they don't already
3390     * exist.  Otherwise, null will be returned if none have been created.
3391     * @see #setInputExtras(int)
3392     * @see EditorInfo#extras
3393     * @attr ref android.R.styleable#TextView_editorExtras
3394     */
3395    public Bundle getInputExtras(boolean create) {
3396        if (mInputContentType == null) {
3397            if (!create) return null;
3398            mInputContentType = new InputContentType();
3399        }
3400        if (mInputContentType.extras == null) {
3401            if (!create) return null;
3402            mInputContentType.extras = new Bundle();
3403        }
3404        return mInputContentType.extras;
3405    }
3406
3407    /**
3408     * Returns the error message that was set to be displayed with
3409     * {@link #setError}, or <code>null</code> if no error was set
3410     * or if it the error was cleared by the widget after user input.
3411     */
3412    public CharSequence getError() {
3413        return mError;
3414    }
3415
3416    /**
3417     * Sets the right-hand compound drawable of the TextView to the "error"
3418     * icon and sets an error message that will be displayed in a popup when
3419     * the TextView has focus.  The icon and error message will be reset to
3420     * null when any key events cause changes to the TextView's text.  If the
3421     * <code>error</code> is <code>null</code>, the error message and icon
3422     * will be cleared.
3423     */
3424    @android.view.RemotableViewMethod
3425    public void setError(CharSequence error) {
3426        if (error == null) {
3427            setError(null, null);
3428        } else {
3429            Drawable dr = getContext().getResources().
3430                getDrawable(com.android.internal.R.drawable.
3431                            indicator_input_error);
3432
3433            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3434            setError(error, dr);
3435        }
3436    }
3437
3438    /**
3439     * Sets the right-hand compound drawable of the TextView to the specified
3440     * icon and sets an error message that will be displayed in a popup when
3441     * the TextView has focus.  The icon and error message will be reset to
3442     * null when any key events cause changes to the TextView's text.  The
3443     * drawable must already have had {@link Drawable#setBounds} set on it.
3444     * If the <code>error</code> is <code>null</code>, the error message will
3445     * be cleared (and you should provide a <code>null</code> icon as well).
3446     */
3447    public void setError(CharSequence error, Drawable icon) {
3448        error = TextUtils.stringOrSpannedString(error);
3449
3450        mError = error;
3451        mErrorWasChanged = true;
3452        final Drawables dr = mDrawables;
3453        if (dr != null) {
3454            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop,
3455                                 icon, dr.mDrawableBottom);
3456        } else {
3457            setCompoundDrawables(null, null, icon, null);
3458        }
3459
3460        if (error == null) {
3461            if (mPopup != null) {
3462                if (mPopup.isShowing()) {
3463                    mPopup.dismiss();
3464                }
3465
3466                mPopup = null;
3467            }
3468        } else {
3469            if (isFocused()) {
3470                showError();
3471            }
3472        }
3473    }
3474
3475    private void showError() {
3476        if (getWindowToken() == null) {
3477            mShowErrorAfterAttach = true;
3478            return;
3479        }
3480
3481        if (mPopup == null) {
3482            LayoutInflater inflater = LayoutInflater.from(getContext());
3483            final TextView err = (TextView) inflater.inflate(com.android.internal.R.layout.textview_hint,
3484                    null);
3485
3486            final float scale = getResources().getDisplayMetrics().density;
3487            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f),
3488                    (int) (50 * scale + 0.5f));
3489            mPopup.setFocusable(false);
3490            // The user is entering text, so the input method is needed.  We
3491            // don't want the popup to be displayed on top of it.
3492            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3493        }
3494
3495        TextView tv = (TextView) mPopup.getContentView();
3496        chooseSize(mPopup, mError, tv);
3497        tv.setText(mError);
3498
3499        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3500        mPopup.fixDirection(mPopup.isAboveAnchor());
3501    }
3502
3503    private static class ErrorPopup extends PopupWindow {
3504        private boolean mAbove = false;
3505        private final TextView mView;
3506
3507        ErrorPopup(TextView v, int width, int height) {
3508            super(v, width, height);
3509            mView = v;
3510        }
3511
3512        void fixDirection(boolean above) {
3513            mAbove = above;
3514
3515            if (above) {
3516                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error_above);
3517            } else {
3518                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error);
3519            }
3520        }
3521
3522        @Override
3523        public void update(int x, int y, int w, int h, boolean force) {
3524            super.update(x, y, w, h, force);
3525
3526            boolean above = isAboveAnchor();
3527            if (above != mAbove) {
3528                fixDirection(above);
3529            }
3530        }
3531    }
3532
3533    /**
3534     * Returns the Y offset to make the pointy top of the error point
3535     * at the middle of the error icon.
3536     */
3537    private int getErrorX() {
3538        /*
3539         * The "25" is the distance between the point and the right edge
3540         * of the background
3541         */
3542        final float scale = getResources().getDisplayMetrics().density;
3543
3544        final Drawables dr = mDrawables;
3545        return getWidth() - mPopup.getWidth()
3546                - getPaddingRight()
3547                - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3548    }
3549
3550    /**
3551     * Returns the Y offset to make the pointy top of the error point
3552     * at the bottom of the error icon.
3553     */
3554    private int getErrorY() {
3555        /*
3556         * Compound, not extended, because the icon is not clipped
3557         * if the text height is smaller.
3558         */
3559        int vspace = mBottom - mTop -
3560                     getCompoundPaddingBottom() - getCompoundPaddingTop();
3561
3562        final Drawables dr = mDrawables;
3563        int icontop = getCompoundPaddingTop()
3564                + (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3565
3566        /*
3567         * The "2" is the distance between the point and the top edge
3568         * of the background.
3569         */
3570
3571        return icontop + (dr != null ? dr.mDrawableHeightRight : 0)
3572                - getHeight() - 2;
3573    }
3574
3575    private void hideError() {
3576        if (mPopup != null) {
3577            if (mPopup.isShowing()) {
3578                mPopup.dismiss();
3579            }
3580        }
3581
3582        mShowErrorAfterAttach = false;
3583    }
3584
3585    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3586        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3587        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3588
3589        /*
3590         * Figure out how big the text would be if we laid it out to the
3591         * full width of this view minus the border.
3592         */
3593        int cap = getWidth() - wid;
3594        if (cap < 0) {
3595            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3596        }
3597
3598        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3599                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3600        float max = 0;
3601        for (int i = 0; i < l.getLineCount(); i++) {
3602            max = Math.max(max, l.getLineWidth(i));
3603        }
3604
3605        /*
3606         * Now set the popup size to be big enough for the text plus the border.
3607         */
3608        pop.setWidth(wid + (int) Math.ceil(max));
3609        pop.setHeight(ht + l.getHeight());
3610    }
3611
3612
3613    @Override
3614    protected boolean setFrame(int l, int t, int r, int b) {
3615        boolean result = super.setFrame(l, t, r, b);
3616
3617        if (mPopup != null) {
3618            TextView tv = (TextView) mPopup.getContentView();
3619            chooseSize(mPopup, mError, tv);
3620            mPopup.update(this, getErrorX(), getErrorY(),
3621                          mPopup.getWidth(), mPopup.getHeight());
3622        }
3623
3624        restartMarqueeIfNeeded();
3625
3626        return result;
3627    }
3628
3629    private void restartMarqueeIfNeeded() {
3630        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3631            mRestartMarquee = false;
3632            startMarquee();
3633        }
3634    }
3635
3636    /**
3637     * Sets the list of input filters that will be used if the buffer is
3638     * Editable.  Has no effect otherwise.
3639     *
3640     * @attr ref android.R.styleable#TextView_maxLength
3641     */
3642    public void setFilters(InputFilter[] filters) {
3643        if (filters == null) {
3644            throw new IllegalArgumentException();
3645        }
3646
3647        mFilters = filters;
3648
3649        if (mText instanceof Editable) {
3650            setFilters((Editable) mText, filters);
3651        }
3652    }
3653
3654    /**
3655     * Sets the list of input filters on the specified Editable,
3656     * and includes mInput in the list if it is an InputFilter.
3657     */
3658    private void setFilters(Editable e, InputFilter[] filters) {
3659        if (mInput instanceof InputFilter) {
3660            InputFilter[] nf = new InputFilter[filters.length + 1];
3661
3662            System.arraycopy(filters, 0, nf, 0, filters.length);
3663            nf[filters.length] = (InputFilter) mInput;
3664
3665            e.setFilters(nf);
3666        } else {
3667            e.setFilters(filters);
3668        }
3669    }
3670
3671    /**
3672     * Returns the current list of input filters.
3673     */
3674    public InputFilter[] getFilters() {
3675        return mFilters;
3676    }
3677
3678    /////////////////////////////////////////////////////////////////////////
3679
3680    private int getVerticalOffset(boolean forceNormal) {
3681        int voffset = 0;
3682        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3683
3684        Layout l = mLayout;
3685        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3686            l = mHintLayout;
3687        }
3688
3689        if (gravity != Gravity.TOP) {
3690            int boxht;
3691
3692            if (l == mHintLayout) {
3693                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3694                        getCompoundPaddingBottom();
3695            } else {
3696                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3697                        getExtendedPaddingBottom();
3698            }
3699            int textht = l.getHeight();
3700
3701            if (textht < boxht) {
3702                if (gravity == Gravity.BOTTOM)
3703                    voffset = boxht - textht;
3704                else // (gravity == Gravity.CENTER_VERTICAL)
3705                    voffset = (boxht - textht) >> 1;
3706            }
3707        }
3708        return voffset;
3709    }
3710
3711    private int getBottomVerticalOffset(boolean forceNormal) {
3712        int voffset = 0;
3713        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3714
3715        Layout l = mLayout;
3716        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3717            l = mHintLayout;
3718        }
3719
3720        if (gravity != Gravity.BOTTOM) {
3721            int boxht;
3722
3723            if (l == mHintLayout) {
3724                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3725                        getCompoundPaddingBottom();
3726            } else {
3727                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3728                        getExtendedPaddingBottom();
3729            }
3730            int textht = l.getHeight();
3731
3732            if (textht < boxht) {
3733                if (gravity == Gravity.TOP)
3734                    voffset = boxht - textht;
3735                else // (gravity == Gravity.CENTER_VERTICAL)
3736                    voffset = (boxht - textht) >> 1;
3737            }
3738        }
3739        return voffset;
3740    }
3741
3742    private void invalidateCursorPath() {
3743        if (mHighlightPathBogus) {
3744            invalidateCursor();
3745        } else {
3746            synchronized (sTempRect) {
3747                /*
3748                 * The reason for this concern about the thickness of the
3749                 * cursor and doing the floor/ceil on the coordinates is that
3750                 * some EditTexts (notably textfields in the Browser) have
3751                 * anti-aliased text where not all the characters are
3752                 * necessarily at integer-multiple locations.  This should
3753                 * make sure the entire cursor gets invalidated instead of
3754                 * sometimes missing half a pixel.
3755                 */
3756
3757                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3758                if (thick < 1.0f) {
3759                    thick = 1.0f;
3760                }
3761
3762                thick /= 2;
3763
3764                mHighlightPath.computeBounds(sTempRect, false);
3765
3766                int left = getCompoundPaddingLeft();
3767                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3768
3769                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3770                           (int) FloatMath.floor(top + sTempRect.top - thick),
3771                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3772                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3773            }
3774        }
3775    }
3776
3777    private void invalidateCursor() {
3778        int where = getSelectionEnd();
3779
3780        invalidateCursor(where, where, where);
3781    }
3782
3783    private void invalidateCursor(int a, int b, int c) {
3784        if (mLayout == null) {
3785            invalidate();
3786        } else {
3787            if (a >= 0 || b >= 0 || c >= 0) {
3788                int first = Math.min(Math.min(a, b), c);
3789                int last = Math.max(Math.max(a, b), c);
3790
3791                int line = mLayout.getLineForOffset(first);
3792                int top = mLayout.getLineTop(line);
3793
3794                // This is ridiculous, but the descent from the line above
3795                // can hang down into the line we really want to redraw,
3796                // so we have to invalidate part of the line above to make
3797                // sure everything that needs to be redrawn really is.
3798                // (But not the whole line above, because that would cause
3799                // the same problem with the descenders on the line above it!)
3800                if (line > 0) {
3801                    top -= mLayout.getLineDescent(line - 1);
3802                }
3803
3804                int line2;
3805
3806                if (first == last)
3807                    line2 = line;
3808                else
3809                    line2 = mLayout.getLineForOffset(last);
3810
3811                int bottom = mLayout.getLineTop(line2 + 1);
3812                int voffset = getVerticalOffset(true);
3813
3814                int left = getCompoundPaddingLeft() + mScrollX;
3815                invalidate(left, top + voffset + getExtendedPaddingTop(),
3816                           left + getWidth() - getCompoundPaddingLeft() -
3817                           getCompoundPaddingRight(),
3818                           bottom + voffset + getExtendedPaddingTop());
3819            }
3820        }
3821    }
3822
3823    private void registerForPreDraw() {
3824        final ViewTreeObserver observer = getViewTreeObserver();
3825        if (observer == null) {
3826            return;
3827        }
3828
3829        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3830            observer.addOnPreDrawListener(this);
3831            mPreDrawState = PREDRAW_PENDING;
3832        } else if (mPreDrawState == PREDRAW_DONE) {
3833            mPreDrawState = PREDRAW_PENDING;
3834        }
3835
3836        // else state is PREDRAW_PENDING, so keep waiting.
3837    }
3838
3839    /**
3840     * {@inheritDoc}
3841     */
3842    public boolean onPreDraw() {
3843        if (mPreDrawState != PREDRAW_PENDING) {
3844            return true;
3845        }
3846
3847        if (mLayout == null) {
3848            assumeLayout();
3849        }
3850
3851        boolean changed = false;
3852
3853        if (mMovement != null) {
3854            /* This code also provides auto-scrolling when a cursor is moved using a
3855             * CursorController (insertion point or selection limits).
3856             * For selection, ensure start or end is visible depending on controller's state.
3857             */
3858            int curs = getSelectionEnd();
3859            // Do not create the controller if it is not already created.
3860            if (mSelectionModifierCursorController != null &&
3861                    mSelectionModifierCursorController.isSelectionStartDragged()) {
3862                curs = getSelectionStart();
3863            }
3864
3865            /*
3866             * TODO: This should really only keep the end in view if
3867             * it already was before the text changed.  I'm not sure
3868             * of a good way to tell from here if it was.
3869             */
3870            if (curs < 0 &&
3871                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3872                curs = mText.length();
3873            }
3874
3875            if (curs >= 0) {
3876                changed = bringPointIntoView(curs);
3877            }
3878        } else {
3879            changed = bringTextIntoView();
3880        }
3881
3882        // This has to be checked here since:
3883        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3884        //   a screen rotation) since layout is not yet initialized at that point.
3885        if (mCreatedWithASelection) {
3886            startSelectionActionMode();
3887            mCreatedWithASelection = false;
3888        }
3889
3890        // Phone specific code (there is no ExtractEditText on tablets).
3891        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
3892        // not be set. Do the test here instead.
3893        if (this instanceof ExtractEditText && hasSelection()) {
3894            startSelectionActionMode();
3895        }
3896
3897        mPreDrawState = PREDRAW_DONE;
3898        return !changed;
3899    }
3900
3901    @Override
3902    protected void onAttachedToWindow() {
3903        super.onAttachedToWindow();
3904
3905        mTemporaryDetach = false;
3906
3907        if (mShowErrorAfterAttach) {
3908            showError();
3909            mShowErrorAfterAttach = false;
3910        }
3911
3912        final ViewTreeObserver observer = getViewTreeObserver();
3913        if (observer != null) {
3914            // No need to create the controller.
3915            // The get method will add the listener on controller creation.
3916            if (mInsertionPointCursorController != null) {
3917                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3918            }
3919            if (mSelectionModifierCursorController != null) {
3920                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3921            }
3922        }
3923    }
3924
3925    @Override
3926    protected void onDetachedFromWindow() {
3927        super.onDetachedFromWindow();
3928
3929        final ViewTreeObserver observer = getViewTreeObserver();
3930        if (observer != null) {
3931            if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3932                observer.removeOnPreDrawListener(this);
3933                mPreDrawState = PREDRAW_NOT_REGISTERED;
3934            }
3935            // No need to create the controller, as getXXController would.
3936            if (mInsertionPointCursorController != null) {
3937                observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3938            }
3939            if (mSelectionModifierCursorController != null) {
3940                observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3941            }
3942        }
3943
3944        if (mError != null) {
3945            hideError();
3946        }
3947
3948        if (mBlink != null) {
3949            mBlink.cancel();
3950        }
3951
3952        if (mInsertionPointCursorController != null) {
3953            mInsertionPointCursorController.onDetached();
3954        }
3955
3956        if (mSelectionModifierCursorController != null) {
3957            mSelectionModifierCursorController.onDetached();
3958        }
3959
3960        hideControllers();
3961    }
3962
3963    @Override
3964    protected boolean isPaddingOffsetRequired() {
3965        return mShadowRadius != 0 || mDrawables != null;
3966    }
3967
3968    @Override
3969    protected int getLeftPaddingOffset() {
3970        return getCompoundPaddingLeft() - mPaddingLeft +
3971                (int) Math.min(0, mShadowDx - mShadowRadius);
3972    }
3973
3974    @Override
3975    protected int getTopPaddingOffset() {
3976        return (int) Math.min(0, mShadowDy - mShadowRadius);
3977    }
3978
3979    @Override
3980    protected int getBottomPaddingOffset() {
3981        return (int) Math.max(0, mShadowDy + mShadowRadius);
3982    }
3983
3984    @Override
3985    protected int getRightPaddingOffset() {
3986        return -(getCompoundPaddingRight() - mPaddingRight) +
3987                (int) Math.max(0, mShadowDx + mShadowRadius);
3988    }
3989
3990    @Override
3991    protected boolean verifyDrawable(Drawable who) {
3992        final boolean verified = super.verifyDrawable(who);
3993        if (!verified && mDrawables != null) {
3994            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
3995                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
3996        }
3997        return verified;
3998    }
3999
4000    @Override
4001    public void jumpDrawablesToCurrentState() {
4002        super.jumpDrawablesToCurrentState();
4003        if (mDrawables != null) {
4004            if (mDrawables.mDrawableLeft != null) {
4005                mDrawables.mDrawableLeft.jumpToCurrentState();
4006            }
4007            if (mDrawables.mDrawableTop != null) {
4008                mDrawables.mDrawableTop.jumpToCurrentState();
4009            }
4010            if (mDrawables.mDrawableRight != null) {
4011                mDrawables.mDrawableRight.jumpToCurrentState();
4012            }
4013            if (mDrawables.mDrawableBottom != null) {
4014                mDrawables.mDrawableBottom.jumpToCurrentState();
4015            }
4016        }
4017    }
4018
4019    @Override
4020    public void invalidateDrawable(Drawable drawable) {
4021        if (verifyDrawable(drawable)) {
4022            final Rect dirty = drawable.getBounds();
4023            int scrollX = mScrollX;
4024            int scrollY = mScrollY;
4025
4026            // IMPORTANT: The coordinates below are based on the coordinates computed
4027            // for each compound drawable in onDraw(). Make sure to update each section
4028            // accordingly.
4029            final TextView.Drawables drawables = mDrawables;
4030            if (drawables != null) {
4031                if (drawable == drawables.mDrawableLeft) {
4032                    final int compoundPaddingTop = getCompoundPaddingTop();
4033                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4034                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4035
4036                    scrollX += mPaddingLeft;
4037                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4038                } else if (drawable == drawables.mDrawableRight) {
4039                    final int compoundPaddingTop = getCompoundPaddingTop();
4040                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4041                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4042
4043                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4044                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4045                } else if (drawable == drawables.mDrawableTop) {
4046                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4047                    final int compoundPaddingRight = getCompoundPaddingRight();
4048                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4049
4050                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4051                    scrollY += mPaddingTop;
4052                } else if (drawable == drawables.mDrawableBottom) {
4053                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4054                    final int compoundPaddingRight = getCompoundPaddingRight();
4055                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4056
4057                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4058                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4059                }
4060            }
4061
4062            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4063                    dirty.right + scrollX, dirty.bottom + scrollY);
4064        }
4065    }
4066
4067    @Override
4068    protected boolean onSetAlpha(int alpha) {
4069        if (mMovement == null && getBackground() == null) {
4070            mCurrentAlpha = alpha;
4071            final Drawables dr = mDrawables;
4072            if (dr != null) {
4073                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4074                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4075                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4076                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4077            }
4078            return true;
4079        }
4080        return false;
4081    }
4082
4083    /**
4084     * When a TextView is used to display a useful piece of information to the user (such as a
4085     * contact's address), it should be made selectable, so that the user can select and copy this
4086     * content.
4087     *
4088     * Use {@link #setTextIsSelectable(boolean)} or the
4089     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4090     * selectable (text is not selectable by default).
4091     *
4092     * Note that the content of an EditText is always selectable.
4093     *
4094     * @return True if the text displayed in this TextView can be selected by the user.
4095     *
4096     * @attr ref android.R.styleable#TextView_textIsSelectable
4097     */
4098    public boolean isTextSelectable() {
4099        return mTextIsSelectable;
4100    }
4101
4102    /**
4103     * Sets whether or not (default) the content of this view is selectable by the user.
4104     *
4105     * Note that this methods affect the {@link #setFocusable(boolean)},
4106     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4107     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4108     * customized.
4109     *
4110     * See {@link #isTextSelectable} for details.
4111     *
4112     * @param selectable Whether or not the content of this TextView should be selectable.
4113     */
4114    public void setTextIsSelectable(boolean selectable) {
4115        if (mTextIsSelectable == selectable) return;
4116
4117        mTextIsSelectable = selectable;
4118
4119        setFocusableInTouchMode(selectable);
4120        setFocusable(selectable);
4121        setClickable(selectable);
4122        setLongClickable(selectable);
4123
4124        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4125
4126        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4127        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4128
4129        // Called by setText above, but safer in case of future code changes
4130        prepareCursorControllers();
4131    }
4132
4133    @Override
4134    protected int[] onCreateDrawableState(int extraSpace) {
4135        final int[] drawableState = super.onCreateDrawableState(extraSpace);
4136        if (mTextIsSelectable) {
4137            // Disable pressed state, which was introduced when TextView was made clickable.
4138            // Prevents text color change.
4139            // setClickable(false) would have a similar effect, but it also disables focus changes
4140            // and long press actions, which are both needed by text selection.
4141            final int length = drawableState.length;
4142            for (int i = 0; i < length; i++) {
4143                if (drawableState[i] == R.attr.state_pressed) {
4144                    final int[] nonPressedState = new int[length - 1];
4145                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4146                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4147                    return nonPressedState;
4148                }
4149            }
4150        }
4151        return drawableState;
4152    }
4153
4154    @Override
4155    protected void onDraw(Canvas canvas) {
4156        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4157
4158        restartMarqueeIfNeeded();
4159
4160        // Draw the background for this view
4161        super.onDraw(canvas);
4162
4163        final int compoundPaddingLeft = getCompoundPaddingLeft();
4164        final int compoundPaddingTop = getCompoundPaddingTop();
4165        final int compoundPaddingRight = getCompoundPaddingRight();
4166        final int compoundPaddingBottom = getCompoundPaddingBottom();
4167        final int scrollX = mScrollX;
4168        final int scrollY = mScrollY;
4169        final int right = mRight;
4170        final int left = mLeft;
4171        final int bottom = mBottom;
4172        final int top = mTop;
4173
4174        final Drawables dr = mDrawables;
4175        if (dr != null) {
4176            /*
4177             * Compound, not extended, because the icon is not clipped
4178             * if the text height is smaller.
4179             */
4180
4181            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4182            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4183
4184            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4185            // Make sure to update invalidateDrawable() when changing this code.
4186            if (dr.mDrawableLeft != null) {
4187                canvas.save();
4188                canvas.translate(scrollX + mPaddingLeft,
4189                                 scrollY + compoundPaddingTop +
4190                                 (vspace - dr.mDrawableHeightLeft) / 2);
4191                dr.mDrawableLeft.draw(canvas);
4192                canvas.restore();
4193            }
4194
4195            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4196            // Make sure to update invalidateDrawable() when changing this code.
4197            if (dr.mDrawableRight != null) {
4198                canvas.save();
4199                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4200                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4201                dr.mDrawableRight.draw(canvas);
4202                canvas.restore();
4203            }
4204
4205            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4206            // Make sure to update invalidateDrawable() when changing this code.
4207            if (dr.mDrawableTop != null) {
4208                canvas.save();
4209                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4210                        scrollY + mPaddingTop);
4211                dr.mDrawableTop.draw(canvas);
4212                canvas.restore();
4213            }
4214
4215            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4216            // Make sure to update invalidateDrawable() when changing this code.
4217            if (dr.mDrawableBottom != null) {
4218                canvas.save();
4219                canvas.translate(scrollX + compoundPaddingLeft +
4220                        (hspace - dr.mDrawableWidthBottom) / 2,
4221                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4222                dr.mDrawableBottom.draw(canvas);
4223                canvas.restore();
4224            }
4225        }
4226
4227        if (mPreDrawState == PREDRAW_DONE) {
4228            final ViewTreeObserver observer = getViewTreeObserver();
4229            if (observer != null) {
4230                observer.removeOnPreDrawListener(this);
4231                mPreDrawState = PREDRAW_NOT_REGISTERED;
4232            }
4233        }
4234
4235        int color = mCurTextColor;
4236
4237        if (mLayout == null) {
4238            assumeLayout();
4239        }
4240
4241        Layout layout = mLayout;
4242        int cursorcolor = color;
4243
4244        if (mHint != null && mText.length() == 0) {
4245            if (mHintTextColor != null) {
4246                color = mCurHintTextColor;
4247            }
4248
4249            layout = mHintLayout;
4250        }
4251
4252        mTextPaint.setColor(color);
4253        mTextPaint.setAlpha(mCurrentAlpha);
4254        mTextPaint.drawableState = getDrawableState();
4255
4256        canvas.save();
4257        /*  Would be faster if we didn't have to do this. Can we chop the
4258            (displayable) text so that we don't need to do this ever?
4259        */
4260
4261        int extendedPaddingTop = getExtendedPaddingTop();
4262        int extendedPaddingBottom = getExtendedPaddingBottom();
4263
4264        float clipLeft = compoundPaddingLeft + scrollX;
4265        float clipTop = extendedPaddingTop + scrollY;
4266        float clipRight = right - left - compoundPaddingRight + scrollX;
4267        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4268
4269        if (mShadowRadius != 0) {
4270            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4271            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4272
4273            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4274            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4275        }
4276
4277        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4278
4279        int voffsetText = 0;
4280        int voffsetCursor = 0;
4281
4282        // translate in by our padding
4283        {
4284            /* shortcircuit calling getVerticaOffset() */
4285            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4286                voffsetText = getVerticalOffset(false);
4287                voffsetCursor = getVerticalOffset(true);
4288            }
4289            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4290        }
4291
4292        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4293            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4294                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4295                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4296                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4297            }
4298
4299            if (mMarquee != null && mMarquee.isRunning()) {
4300                canvas.translate(-mMarquee.mScroll, 0.0f);
4301            }
4302        }
4303
4304        Path highlight = null;
4305        int selStart = -1, selEnd = -1;
4306
4307        //  If there is no movement method, then there can be no selection.
4308        //  Check that first and attempt to skip everything having to do with
4309        //  the cursor.
4310        //  XXX This is not strictly true -- a program could set the
4311        //  selection manually if it really wanted to.
4312        if (mMovement != null && (isFocused() || isPressed())) {
4313            selStart = getSelectionStart();
4314            selEnd = getSelectionEnd();
4315
4316            if ((mCursorVisible || mTextIsSelectable) && selStart >= 0 && isEnabled()) {
4317                if (mHighlightPath == null)
4318                    mHighlightPath = new Path();
4319
4320                if (selStart == selEnd) {
4321                    if (!mTextIsSelectable &&
4322                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4323                        if (mHighlightPathBogus) {
4324                            mHighlightPath.reset();
4325                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4326                            mHighlightPathBogus = false;
4327                        }
4328
4329                        // XXX should pass to skin instead of drawing directly
4330                        mHighlightPaint.setColor(cursorcolor);
4331                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4332
4333                        highlight = mHighlightPath;
4334                    }
4335                } else {
4336                    if (mHighlightPathBogus) {
4337                        mHighlightPath.reset();
4338                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4339                        mHighlightPathBogus = false;
4340                    }
4341
4342                    // XXX should pass to skin instead of drawing directly
4343                    mHighlightPaint.setColor(mHighlightColor);
4344                    mHighlightPaint.setStyle(Paint.Style.FILL);
4345
4346                    highlight = mHighlightPath;
4347                }
4348            }
4349        }
4350
4351        /*  Comment out until we decide what to do about animations
4352        boolean isLinearTextOn = false;
4353        if (currentTransformation != null) {
4354            isLinearTextOn = mTextPaint.isLinearTextOn();
4355            Matrix m = currentTransformation.getMatrix();
4356            if (!m.isIdentity()) {
4357                // mTextPaint.setLinearTextOn(true);
4358            }
4359        }
4360        */
4361
4362        final InputMethodState ims = mInputMethodState;
4363        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4364        if (ims != null && ims.mBatchEditNesting == 0) {
4365            InputMethodManager imm = InputMethodManager.peekInstance();
4366            if (imm != null) {
4367                if (imm.isActive(this)) {
4368                    boolean reported = false;
4369                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4370                        // We are in extract mode and the content has changed
4371                        // in some way... just report complete new text to the
4372                        // input method.
4373                        reported = reportExtractedText();
4374                    }
4375                    if (!reported && highlight != null) {
4376                        int candStart = -1;
4377                        int candEnd = -1;
4378                        if (mText instanceof Spannable) {
4379                            Spannable sp = (Spannable)mText;
4380                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4381                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4382                        }
4383                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4384                    }
4385                }
4386
4387                if (imm.isWatchingCursor(this) && highlight != null) {
4388                    highlight.computeBounds(ims.mTmpRectF, true);
4389                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4390
4391                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4392                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4393
4394                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4395
4396                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4397                            (int)(ims.mTmpRectF.top + 0.5),
4398                            (int)(ims.mTmpRectF.right + 0.5),
4399                            (int)(ims.mTmpRectF.bottom + 0.5));
4400
4401                    imm.updateCursor(this,
4402                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4403                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4404                }
4405            }
4406        }
4407
4408        if (mCorrectionHighlighter != null) {
4409            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4410        }
4411
4412        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4413
4414        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4415            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4416            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4417        }
4418
4419        /*  Comment out until we decide what to do about animations
4420        if (currentTransformation != null) {
4421            mTextPaint.setLinearTextOn(isLinearTextOn);
4422        }
4423        */
4424
4425        canvas.restore();
4426
4427        updateCursorControllerPositions();
4428    }
4429
4430    /**
4431     * Update the positions of the CursorControllers.  Needed by WebTextView,
4432     * which does not draw.
4433     * @hide
4434     */
4435    protected void updateCursorControllerPositions() {
4436        // No need to create the controllers if they were not already
4437        if (mInsertionPointCursorController != null &&
4438                mInsertionPointCursorController.isShowing()) {
4439            mInsertionPointCursorController.updatePosition();
4440        }
4441        if (mSelectionModifierCursorController != null &&
4442                mSelectionModifierCursorController.isShowing()) {
4443            mSelectionModifierCursorController.updatePosition();
4444        }
4445    }
4446
4447    @Override
4448    public void getFocusedRect(Rect r) {
4449        if (mLayout == null) {
4450            super.getFocusedRect(r);
4451            return;
4452        }
4453
4454        int sel = getSelectionEnd();
4455        if (sel < 0) {
4456            super.getFocusedRect(r);
4457            return;
4458        }
4459
4460        int line = mLayout.getLineForOffset(sel);
4461        r.top = mLayout.getLineTop(line);
4462        r.bottom = mLayout.getLineBottom(line);
4463
4464        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4465        r.right = r.left + 1;
4466
4467        // Adjust for padding and gravity.
4468        int paddingLeft = getCompoundPaddingLeft();
4469        int paddingTop = getExtendedPaddingTop();
4470        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4471            paddingTop += getVerticalOffset(false);
4472        }
4473        r.offset(paddingLeft, paddingTop);
4474    }
4475
4476    /**
4477     * Return the number of lines of text, or 0 if the internal Layout has not
4478     * been built.
4479     */
4480    public int getLineCount() {
4481        return mLayout != null ? mLayout.getLineCount() : 0;
4482    }
4483
4484    /**
4485     * Return the baseline for the specified line (0...getLineCount() - 1)
4486     * If bounds is not null, return the top, left, right, bottom extents
4487     * of the specified line in it. If the internal Layout has not been built,
4488     * return 0 and set bounds to (0, 0, 0, 0)
4489     * @param line which line to examine (0..getLineCount() - 1)
4490     * @param bounds Optional. If not null, it returns the extent of the line
4491     * @return the Y-coordinate of the baseline
4492     */
4493    public int getLineBounds(int line, Rect bounds) {
4494        if (mLayout == null) {
4495            if (bounds != null) {
4496                bounds.set(0, 0, 0, 0);
4497            }
4498            return 0;
4499        }
4500        else {
4501            int baseline = mLayout.getLineBounds(line, bounds);
4502
4503            int voffset = getExtendedPaddingTop();
4504            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4505                voffset += getVerticalOffset(true);
4506            }
4507            if (bounds != null) {
4508                bounds.offset(getCompoundPaddingLeft(), voffset);
4509            }
4510            return baseline + voffset;
4511        }
4512    }
4513
4514    @Override
4515    public int getBaseline() {
4516        if (mLayout == null) {
4517            return super.getBaseline();
4518        }
4519
4520        int voffset = 0;
4521        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4522            voffset = getVerticalOffset(true);
4523        }
4524
4525        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4526    }
4527
4528    @Override
4529    public boolean onKeyDown(int keyCode, KeyEvent event) {
4530        int which = doKeyDown(keyCode, event, null);
4531        if (which == 0) {
4532            // Go through default dispatching.
4533            return super.onKeyDown(keyCode, event);
4534        }
4535
4536        return true;
4537    }
4538
4539    @Override
4540    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4541        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4542
4543        int which = doKeyDown(keyCode, down, event);
4544        if (which == 0) {
4545            // Go through default dispatching.
4546            return super.onKeyMultiple(keyCode, repeatCount, event);
4547        }
4548        if (which == -1) {
4549            // Consumed the whole thing.
4550            return true;
4551        }
4552
4553        repeatCount--;
4554
4555        // We are going to dispatch the remaining events to either the input
4556        // or movement method.  To do this, we will just send a repeated stream
4557        // of down and up events until we have done the complete repeatCount.
4558        // It would be nice if those interfaces had an onKeyMultiple() method,
4559        // but adding that is a more complicated change.
4560        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4561        if (which == 1) {
4562            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4563            while (--repeatCount > 0) {
4564                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4565                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4566            }
4567            if (mError != null && !mErrorWasChanged) {
4568                setError(null, null);
4569            }
4570
4571        } else if (which == 2) {
4572            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4573            while (--repeatCount > 0) {
4574                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4575                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4576            }
4577        }
4578
4579        return true;
4580    }
4581
4582    /**
4583     * Returns true if pressing ENTER in this field advances focus instead
4584     * of inserting the character.  This is true mostly in single-line fields,
4585     * but also in mail addresses and subjects which will display on multiple
4586     * lines but where it doesn't make sense to insert newlines.
4587     */
4588    private boolean shouldAdvanceFocusOnEnter() {
4589        if (mInput == null) {
4590            return false;
4591        }
4592
4593        if (mSingleLine) {
4594            return true;
4595        }
4596
4597        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4598            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4599            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4600                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4601                return true;
4602            }
4603        }
4604
4605        return false;
4606    }
4607
4608    /**
4609     * Returns true if pressing TAB in this field advances focus instead
4610     * of inserting the character.  Insert tabs only in multi-line editors.
4611     */
4612    private boolean shouldAdvanceFocusOnTab() {
4613        if (mInput != null && !mSingleLine) {
4614            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4615                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4616                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4617                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4618                    return false;
4619                }
4620            }
4621        }
4622        return true;
4623    }
4624
4625    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4626        if (!isEnabled()) {
4627            return 0;
4628        }
4629
4630        switch (keyCode) {
4631            case KeyEvent.KEYCODE_ENTER:
4632                mEnterKeyIsDown = true;
4633                if (event.hasNoModifiers()) {
4634                    // When mInputContentType is set, we know that we are
4635                    // running in a "modern" cupcake environment, so don't need
4636                    // to worry about the application trying to capture
4637                    // enter key events.
4638                    if (mInputContentType != null) {
4639                        // If there is an action listener, given them a
4640                        // chance to consume the event.
4641                        if (mInputContentType.onEditorActionListener != null &&
4642                                mInputContentType.onEditorActionListener.onEditorAction(
4643                                this, EditorInfo.IME_NULL, event)) {
4644                            mInputContentType.enterDown = true;
4645                            // We are consuming the enter key for them.
4646                            return -1;
4647                        }
4648                    }
4649
4650                    // If our editor should move focus when enter is pressed, or
4651                    // this is a generated event from an IME action button, then
4652                    // don't let it be inserted into the text.
4653                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4654                            || shouldAdvanceFocusOnEnter()) {
4655                        return -1;
4656                    }
4657                }
4658                break;
4659
4660            case KeyEvent.KEYCODE_DPAD_CENTER:
4661                mDPadCenterIsDown = true;
4662                if (event.hasNoModifiers()) {
4663                    if (shouldAdvanceFocusOnEnter()) {
4664                        return 0;
4665                    }
4666                }
4667                break;
4668
4669            case KeyEvent.KEYCODE_TAB:
4670                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
4671                    if (shouldAdvanceFocusOnTab()) {
4672                        return 0;
4673                    }
4674                }
4675                break;
4676
4677                // Has to be done on key down (and not on key up) to correctly be intercepted.
4678            case KeyEvent.KEYCODE_BACK:
4679                if (mSelectionActionMode != null) {
4680                    stopSelectionActionMode();
4681                    return -1;
4682                }
4683                break;
4684        }
4685
4686        if (mInput != null) {
4687            /*
4688             * Keep track of what the error was before doing the input
4689             * so that if an input filter changed the error, we leave
4690             * that error showing.  Otherwise, we take down whatever
4691             * error was showing when the user types something.
4692             */
4693            mErrorWasChanged = false;
4694
4695            boolean doDown = true;
4696            if (otherEvent != null) {
4697                try {
4698                    beginBatchEdit();
4699                    boolean handled = mInput.onKeyOther(this, (Editable) mText,
4700                            otherEvent);
4701                    if (mError != null && !mErrorWasChanged) {
4702                        setError(null, null);
4703                    }
4704                    doDown = false;
4705                    if (handled) {
4706                        return -1;
4707                    }
4708                } catch (AbstractMethodError e) {
4709                    // onKeyOther was added after 1.0, so if it isn't
4710                    // implemented we need to try to dispatch as a regular down.
4711                } finally {
4712                    endBatchEdit();
4713                }
4714            }
4715
4716            if (doDown) {
4717                beginBatchEdit();
4718                if (mInput.onKeyDown(this, (Editable) mText, keyCode, event)) {
4719                    endBatchEdit();
4720                    if (mError != null && !mErrorWasChanged) {
4721                        setError(null, null);
4722                    }
4723                    return 1;
4724                }
4725                endBatchEdit();
4726            }
4727        }
4728
4729        // bug 650865: sometimes we get a key event before a layout.
4730        // don't try to move around if we don't know the layout.
4731
4732        if (mMovement != null && mLayout != null) {
4733            boolean doDown = true;
4734            if (otherEvent != null) {
4735                try {
4736                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4737                            otherEvent);
4738                    doDown = false;
4739                    if (handled) {
4740                        return -1;
4741                    }
4742                } catch (AbstractMethodError e) {
4743                    // onKeyOther was added after 1.0, so if it isn't
4744                    // implemented we need to try to dispatch as a regular down.
4745                }
4746            }
4747            if (doDown) {
4748                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4749                    return 2;
4750            }
4751        }
4752
4753        return 0;
4754    }
4755
4756    @Override
4757    public boolean onKeyUp(int keyCode, KeyEvent event) {
4758        if (!isEnabled()) {
4759            return super.onKeyUp(keyCode, event);
4760        }
4761
4762        hideControllers();
4763        stopSelectionActionMode();
4764
4765        switch (keyCode) {
4766            case KeyEvent.KEYCODE_DPAD_CENTER:
4767                mDPadCenterIsDown = false;
4768                if (event.hasNoModifiers()) {
4769                    /*
4770                     * If there is a click listener, just call through to
4771                     * super, which will invoke it.
4772                     *
4773                     * If there isn't a click listener, try to show the soft
4774                     * input method.  (It will also
4775                     * call performClick(), but that won't do anything in
4776                     * this case.)
4777                     */
4778                    if (mOnClickListener == null) {
4779                        if (mMovement != null && mText instanceof Editable
4780                                && mLayout != null && onCheckIsTextEditor()) {
4781                            InputMethodManager imm = (InputMethodManager)
4782                                    getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
4783                            imm.showSoftInput(this, 0);
4784                        }
4785                    }
4786                }
4787                return super.onKeyUp(keyCode, event);
4788
4789            case KeyEvent.KEYCODE_ENTER:
4790                mEnterKeyIsDown = false;
4791                if (event.hasNoModifiers()) {
4792                    if (mInputContentType != null
4793                            && mInputContentType.onEditorActionListener != null
4794                            && mInputContentType.enterDown) {
4795                        mInputContentType.enterDown = false;
4796                        if (mInputContentType.onEditorActionListener.onEditorAction(
4797                                this, EditorInfo.IME_NULL, event)) {
4798                            return true;
4799                        }
4800                    }
4801
4802                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4803                            || shouldAdvanceFocusOnEnter()) {
4804                        /*
4805                         * If there is a click listener, just call through to
4806                         * super, which will invoke it.
4807                         *
4808                         * If there isn't a click listener, try to advance focus,
4809                         * but still call through to super, which will reset the
4810                         * pressed state and longpress state.  (It will also
4811                         * call performClick(), but that won't do anything in
4812                         * this case.)
4813                         */
4814                        if (mOnClickListener == null) {
4815                            View v = focusSearch(FOCUS_DOWN);
4816
4817                            if (v != null) {
4818                                if (!v.requestFocus(FOCUS_DOWN)) {
4819                                    throw new IllegalStateException(
4820                                            "focus search returned a view " +
4821                                            "that wasn't able to take focus!");
4822                                }
4823
4824                                /*
4825                                 * Return true because we handled the key; super
4826                                 * will return false because there was no click
4827                                 * listener.
4828                                 */
4829                                super.onKeyUp(keyCode, event);
4830                                return true;
4831                            } else if ((event.getFlags()
4832                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4833                                // No target for next focus, but make sure the IME
4834                                // if this came from it.
4835                                InputMethodManager imm = InputMethodManager.peekInstance();
4836                                if (imm != null) {
4837                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4838                                }
4839                            }
4840                        }
4841                    }
4842                    return super.onKeyUp(keyCode, event);
4843                }
4844                break;
4845        }
4846
4847        if (mInput != null)
4848            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4849                return true;
4850
4851        if (mMovement != null && mLayout != null)
4852            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4853                return true;
4854
4855        return super.onKeyUp(keyCode, event);
4856    }
4857
4858    @Override public boolean onCheckIsTextEditor() {
4859        return mInputType != EditorInfo.TYPE_NULL;
4860    }
4861
4862    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4863        if (onCheckIsTextEditor() && isEnabled()) {
4864            if (mInputMethodState == null) {
4865                mInputMethodState = new InputMethodState();
4866            }
4867            outAttrs.inputType = mInputType;
4868            if (mInputContentType != null) {
4869                outAttrs.imeOptions = mInputContentType.imeOptions;
4870                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4871                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4872                outAttrs.actionId = mInputContentType.imeActionId;
4873                outAttrs.extras = mInputContentType.extras;
4874            } else {
4875                outAttrs.imeOptions = EditorInfo.IME_NULL;
4876            }
4877            if (focusSearch(FOCUS_DOWN) != null) {
4878                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
4879            }
4880            if (focusSearch(FOCUS_UP) != null) {
4881                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
4882            }
4883            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4884                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4885                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
4886                    // An action has not been set, but the enter key will move to
4887                    // the next focus, so set the action to that.
4888                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4889                } else {
4890                    // An action has not been set, and there is no focus to move
4891                    // to, so let's just supply a "done" action.
4892                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4893                }
4894                if (!shouldAdvanceFocusOnEnter()) {
4895                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4896                }
4897            }
4898            if (isMultilineInputType(outAttrs.inputType)) {
4899                // Multi-line text editors should always show an enter key.
4900                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4901            }
4902            outAttrs.hintText = mHint;
4903            if (mText instanceof Editable) {
4904                InputConnection ic = new EditableInputConnection(this);
4905                outAttrs.initialSelStart = getSelectionStart();
4906                outAttrs.initialSelEnd = getSelectionEnd();
4907                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4908                return ic;
4909            }
4910        }
4911        return null;
4912    }
4913
4914    /**
4915     * If this TextView contains editable content, extract a portion of it
4916     * based on the information in <var>request</var> in to <var>outText</var>.
4917     * @return Returns true if the text was successfully extracted, else false.
4918     */
4919    public boolean extractText(ExtractedTextRequest request,
4920            ExtractedText outText) {
4921        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4922                EXTRACT_UNKNOWN, outText);
4923    }
4924
4925    static final int EXTRACT_NOTHING = -2;
4926    static final int EXTRACT_UNKNOWN = -1;
4927
4928    boolean extractTextInternal(ExtractedTextRequest request,
4929            int partialStartOffset, int partialEndOffset, int delta,
4930            ExtractedText outText) {
4931        final CharSequence content = mText;
4932        if (content != null) {
4933            if (partialStartOffset != EXTRACT_NOTHING) {
4934                final int N = content.length();
4935                if (partialStartOffset < 0) {
4936                    outText.partialStartOffset = outText.partialEndOffset = -1;
4937                    partialStartOffset = 0;
4938                    partialEndOffset = N;
4939                } else {
4940                    // Now use the delta to determine the actual amount of text
4941                    // we need.
4942                    partialEndOffset += delta;
4943                    // Adjust offsets to ensure we contain full spans.
4944                    if (content instanceof Spanned) {
4945                        Spanned spanned = (Spanned)content;
4946                        Object[] spans = spanned.getSpans(partialStartOffset,
4947                                partialEndOffset, ParcelableSpan.class);
4948                        int i = spans.length;
4949                        while (i > 0) {
4950                            i--;
4951                            int j = spanned.getSpanStart(spans[i]);
4952                            if (j < partialStartOffset) partialStartOffset = j;
4953                            j = spanned.getSpanEnd(spans[i]);
4954                            if (j > partialEndOffset) partialEndOffset = j;
4955                        }
4956                    }
4957                    outText.partialStartOffset = partialStartOffset;
4958                    outText.partialEndOffset = partialEndOffset - delta;
4959
4960                    if (partialStartOffset > N) {
4961                        partialStartOffset = N;
4962                    } else if (partialStartOffset < 0) {
4963                        partialStartOffset = 0;
4964                    }
4965                    if (partialEndOffset > N) {
4966                        partialEndOffset = N;
4967                    } else if (partialEndOffset < 0) {
4968                        partialEndOffset = 0;
4969                    }
4970                }
4971                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
4972                    outText.text = content.subSequence(partialStartOffset,
4973                            partialEndOffset);
4974                } else {
4975                    outText.text = TextUtils.substring(content, partialStartOffset,
4976                            partialEndOffset);
4977                }
4978            } else {
4979                outText.partialStartOffset = 0;
4980                outText.partialEndOffset = 0;
4981                outText.text = "";
4982            }
4983            outText.flags = 0;
4984            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
4985                outText.flags |= ExtractedText.FLAG_SELECTING;
4986            }
4987            if (mSingleLine) {
4988                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
4989            }
4990            outText.startOffset = 0;
4991            outText.selectionStart = getSelectionStart();
4992            outText.selectionEnd = getSelectionEnd();
4993            return true;
4994        }
4995        return false;
4996    }
4997
4998    boolean reportExtractedText() {
4999        final InputMethodState ims = mInputMethodState;
5000        if (ims != null) {
5001            final boolean contentChanged = ims.mContentChanged;
5002            if (contentChanged || ims.mSelectionModeChanged) {
5003                ims.mContentChanged = false;
5004                ims.mSelectionModeChanged = false;
5005                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5006                if (req != null) {
5007                    InputMethodManager imm = InputMethodManager.peekInstance();
5008                    if (imm != null) {
5009                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5010                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5011                                + " delta=" + ims.mChangedDelta);
5012                        if (ims.mChangedStart < 0 && !contentChanged) {
5013                            ims.mChangedStart = EXTRACT_NOTHING;
5014                        }
5015                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5016                                ims.mChangedDelta, ims.mTmpExtracted)) {
5017                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5018                                    + ims.mTmpExtracted.partialStartOffset
5019                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5020                                    + ": " + ims.mTmpExtracted.text);
5021                            imm.updateExtractedText(this, req.token,
5022                                    mInputMethodState.mTmpExtracted);
5023                            ims.mChangedStart = EXTRACT_UNKNOWN;
5024                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5025                            ims.mChangedDelta = 0;
5026                            ims.mContentChanged = false;
5027                            return true;
5028                        }
5029                    }
5030                }
5031            }
5032        }
5033        return false;
5034    }
5035
5036    /**
5037     * This is used to remove all style-impacting spans from text before new
5038     * extracted text is being replaced into it, so that we don't have any
5039     * lingering spans applied during the replace.
5040     */
5041    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5042        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5043        int i = spans.length;
5044        while (i > 0) {
5045            i--;
5046            spannable.removeSpan(spans[i]);
5047        }
5048    }
5049
5050    /**
5051     * Apply to this text view the given extracted text, as previously
5052     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5053     */
5054    public void setExtractedText(ExtractedText text) {
5055        Editable content = getEditableText();
5056        if (text.text != null) {
5057            if (content == null) {
5058                setText(text.text, TextView.BufferType.EDITABLE);
5059            } else if (text.partialStartOffset < 0) {
5060                removeParcelableSpans(content, 0, content.length());
5061                content.replace(0, content.length(), text.text);
5062            } else {
5063                final int N = content.length();
5064                int start = text.partialStartOffset;
5065                if (start > N) start = N;
5066                int end = text.partialEndOffset;
5067                if (end > N) end = N;
5068                removeParcelableSpans(content, start, end);
5069                content.replace(start, end, text.text);
5070            }
5071        }
5072
5073        // Now set the selection position...  make sure it is in range, to
5074        // avoid crashes.  If this is a partial update, it is possible that
5075        // the underlying text may have changed, causing us problems here.
5076        // Also we just don't want to trust clients to do the right thing.
5077        Spannable sp = (Spannable)getText();
5078        final int N = sp.length();
5079        int start = text.selectionStart;
5080        if (start < 0) start = 0;
5081        else if (start > N) start = N;
5082        int end = text.selectionEnd;
5083        if (end < 0) end = 0;
5084        else if (end > N) end = N;
5085        Selection.setSelection(sp, start, end);
5086
5087        // Finally, update the selection mode.
5088        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5089            MetaKeyKeyListener.startSelecting(this, sp);
5090        } else {
5091            MetaKeyKeyListener.stopSelecting(this, sp);
5092        }
5093    }
5094
5095    /**
5096     * @hide
5097     */
5098    public void setExtracting(ExtractedTextRequest req) {
5099        if (mInputMethodState != null) {
5100            mInputMethodState.mExtracting = req;
5101        }
5102        hideControllers();
5103    }
5104
5105    /**
5106     * Called by the framework in response to a text completion from
5107     * the current input method, provided by it calling
5108     * {@link InputConnection#commitCompletion
5109     * InputConnection.commitCompletion()}.  The default implementation does
5110     * nothing; text views that are supporting auto-completion should override
5111     * this to do their desired behavior.
5112     *
5113     * @param text The auto complete text the user has selected.
5114     */
5115    public void onCommitCompletion(CompletionInfo text) {
5116    }
5117
5118    /**
5119     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5120     * a dictionnary) from the current input method, provided by it calling
5121     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5122     * implementation flashes the background of the corrected word to provide feedback to the user.
5123     *
5124     * @param info The auto correct info about the text that was corrected.
5125     */
5126    public void onCommitCorrection(CorrectionInfo info) {
5127        if (mCorrectionHighlighter == null) {
5128            mCorrectionHighlighter = new CorrectionHighlighter();
5129        } else {
5130            mCorrectionHighlighter.invalidate(false);
5131        }
5132
5133        mCorrectionHighlighter.highlight(info);
5134    }
5135
5136    private class CorrectionHighlighter {
5137        private final Path mPath = new Path();
5138        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5139        private int mStart, mEnd;
5140        private long mFadingStartTime;
5141        private final static int FADE_OUT_DURATION = 400;
5142
5143        public CorrectionHighlighter() {
5144            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5145            mPaint.setStyle(Paint.Style.FILL);
5146        }
5147
5148        public void highlight(CorrectionInfo info) {
5149            mStart = info.getOffset();
5150            mEnd = mStart + info.getNewText().length();
5151            mFadingStartTime = SystemClock.uptimeMillis();
5152
5153            if (mStart < 0 || mEnd < 0) {
5154                stopAnimation();
5155            }
5156        }
5157
5158        public void draw(Canvas canvas, int cursorOffsetVertical) {
5159            if (updatePath() && updatePaint()) {
5160                if (cursorOffsetVertical != 0) {
5161                    canvas.translate(0, cursorOffsetVertical);
5162                }
5163
5164                canvas.drawPath(mPath, mPaint);
5165
5166                if (cursorOffsetVertical != 0) {
5167                    canvas.translate(0, -cursorOffsetVertical);
5168                }
5169                invalidate(true);
5170            } else {
5171                stopAnimation();
5172                invalidate(false);
5173            }
5174        }
5175
5176        private boolean updatePaint() {
5177            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5178            if (duration > FADE_OUT_DURATION) return false;
5179
5180            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5181            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5182            final int color = (mHighlightColor & 0x00FFFFFF) +
5183                    ((int) (highlightColorAlpha * coef) << 24);
5184            mPaint.setColor(color);
5185            return true;
5186        }
5187
5188        private boolean updatePath() {
5189            final Layout layout = TextView.this.mLayout;
5190            if (layout == null) return false;
5191
5192            // Update in case text is edited while the animation is run
5193            final int length = mText.length();
5194            int start = Math.min(length, mStart);
5195            int end = Math.min(length, mEnd);
5196
5197            mPath.reset();
5198            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5199            return true;
5200        }
5201
5202        private void invalidate(boolean delayed) {
5203            if (TextView.this.mLayout == null) return;
5204
5205            synchronized (sTempRect) {
5206                mPath.computeBounds(sTempRect, false);
5207
5208                int left = getCompoundPaddingLeft();
5209                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5210
5211                if (delayed) {
5212                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5213                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5214                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5215                } else {
5216                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5217                            (int) sTempRect.right, (int) sTempRect.bottom);
5218                }
5219            }
5220        }
5221
5222        private void stopAnimation() {
5223            TextView.this.mCorrectionHighlighter = null;
5224        }
5225    }
5226
5227    public void beginBatchEdit() {
5228        mInBatchEditControllers = true;
5229        final InputMethodState ims = mInputMethodState;
5230        if (ims != null) {
5231            int nesting = ++ims.mBatchEditNesting;
5232            if (nesting == 1) {
5233                ims.mCursorChanged = false;
5234                ims.mChangedDelta = 0;
5235                if (ims.mContentChanged) {
5236                    // We already have a pending change from somewhere else,
5237                    // so turn this into a full update.
5238                    ims.mChangedStart = 0;
5239                    ims.mChangedEnd = mText.length();
5240                } else {
5241                    ims.mChangedStart = EXTRACT_UNKNOWN;
5242                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5243                    ims.mContentChanged = false;
5244                }
5245                onBeginBatchEdit();
5246            }
5247        }
5248    }
5249
5250    public void endBatchEdit() {
5251        mInBatchEditControllers = false;
5252        final InputMethodState ims = mInputMethodState;
5253        if (ims != null) {
5254            int nesting = --ims.mBatchEditNesting;
5255            if (nesting == 0) {
5256                finishBatchEdit(ims);
5257            }
5258        }
5259    }
5260
5261    void ensureEndedBatchEdit() {
5262        final InputMethodState ims = mInputMethodState;
5263        if (ims != null && ims.mBatchEditNesting != 0) {
5264            ims.mBatchEditNesting = 0;
5265            finishBatchEdit(ims);
5266        }
5267    }
5268
5269    void finishBatchEdit(final InputMethodState ims) {
5270        onEndBatchEdit();
5271
5272        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5273            updateAfterEdit();
5274            reportExtractedText();
5275        } else if (ims.mCursorChanged) {
5276            // Cheezy way to get us to report the current cursor location.
5277            invalidateCursor();
5278        }
5279    }
5280
5281    void updateAfterEdit() {
5282        invalidate();
5283        int curs = getSelectionStart();
5284
5285        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
5286                             Gravity.BOTTOM) {
5287            registerForPreDraw();
5288        }
5289
5290        if (curs >= 0) {
5291            mHighlightPathBogus = true;
5292
5293            if (isFocused()) {
5294                mShowCursor = SystemClock.uptimeMillis();
5295                makeBlink();
5296            }
5297        }
5298
5299        checkForResize();
5300    }
5301
5302    /**
5303     * Called by the framework in response to a request to begin a batch
5304     * of edit operations through a call to link {@link #beginBatchEdit()}.
5305     */
5306    public void onBeginBatchEdit() {
5307    }
5308
5309    /**
5310     * Called by the framework in response to a request to end a batch
5311     * of edit operations through a call to link {@link #endBatchEdit}.
5312     */
5313    public void onEndBatchEdit() {
5314    }
5315
5316    /**
5317     * Called by the framework in response to a private command from the
5318     * current method, provided by it calling
5319     * {@link InputConnection#performPrivateCommand
5320     * InputConnection.performPrivateCommand()}.
5321     *
5322     * @param action The action name of the command.
5323     * @param data Any additional data for the command.  This may be null.
5324     * @return Return true if you handled the command, else false.
5325     */
5326    public boolean onPrivateIMECommand(String action, Bundle data) {
5327        return false;
5328    }
5329
5330    private void nullLayouts() {
5331        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5332            mSavedLayout = (BoringLayout) mLayout;
5333        }
5334        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5335            mSavedHintLayout = (BoringLayout) mHintLayout;
5336        }
5337
5338        mLayout = mHintLayout = null;
5339
5340        // Since it depends on the value of mLayout
5341        prepareCursorControllers();
5342    }
5343
5344    /**
5345     * Make a new Layout based on the already-measured size of the view,
5346     * on the assumption that it was measured correctly at some point.
5347     */
5348    private void assumeLayout() {
5349        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5350
5351        if (width < 1) {
5352            width = 0;
5353        }
5354
5355        int physicalWidth = width;
5356
5357        if (mHorizontallyScrolling) {
5358            width = VERY_WIDE;
5359        }
5360
5361        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5362                      physicalWidth, false);
5363    }
5364
5365    /**
5366     * The width passed in is now the desired layout width,
5367     * not the full view width with padding.
5368     * {@hide}
5369     */
5370    protected void makeNewLayout(int w, int hintWidth,
5371                                 BoringLayout.Metrics boring,
5372                                 BoringLayout.Metrics hintBoring,
5373                                 int ellipsisWidth, boolean bringIntoView) {
5374        stopMarquee();
5375
5376        mHighlightPathBogus = true;
5377
5378        if (w < 0) {
5379            w = 0;
5380        }
5381        if (hintWidth < 0) {
5382            hintWidth = 0;
5383        }
5384
5385        Layout.Alignment alignment;
5386        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
5387            case Gravity.CENTER_HORIZONTAL:
5388                alignment = Layout.Alignment.ALIGN_CENTER;
5389                break;
5390
5391            case Gravity.RIGHT:
5392                // Note, Layout resolves ALIGN_OPPOSITE to left or
5393                // right based on the paragraph direction.
5394                alignment = Layout.Alignment.ALIGN_OPPOSITE;
5395                break;
5396
5397            default:
5398                alignment = Layout.Alignment.ALIGN_NORMAL;
5399        }
5400
5401        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5402
5403        if (mText instanceof Spannable) {
5404            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5405                    alignment, mSpacingMult,
5406                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5407                    ellipsisWidth);
5408        } else {
5409            if (boring == UNKNOWN_BORING) {
5410                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
5411                                               mBoring);
5412                if (boring != null) {
5413                    mBoring = boring;
5414                }
5415            }
5416
5417            if (boring != null) {
5418                if (boring.width <= w &&
5419                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
5420                    if (mSavedLayout != null) {
5421                        mLayout = mSavedLayout.
5422                                replaceOrMake(mTransformed, mTextPaint,
5423                                w, alignment, mSpacingMult, mSpacingAdd,
5424                                boring, mIncludePad);
5425                    } else {
5426                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5427                                w, alignment, mSpacingMult, mSpacingAdd,
5428                                boring, mIncludePad);
5429                    }
5430
5431                    mSavedLayout = (BoringLayout) mLayout;
5432                } else if (shouldEllipsize && boring.width <= w) {
5433                    if (mSavedLayout != null) {
5434                        mLayout = mSavedLayout.
5435                                replaceOrMake(mTransformed, mTextPaint,
5436                                w, alignment, mSpacingMult, mSpacingAdd,
5437                                boring, mIncludePad, mEllipsize,
5438                                ellipsisWidth);
5439                    } else {
5440                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5441                                w, alignment, mSpacingMult, mSpacingAdd,
5442                                boring, mIncludePad, mEllipsize,
5443                                ellipsisWidth);
5444                    }
5445                } else if (shouldEllipsize) {
5446                    mLayout = new StaticLayout(mTransformed,
5447                                0, mTransformed.length(),
5448                                mTextPaint, w, alignment, mSpacingMult,
5449                                mSpacingAdd, mIncludePad, mEllipsize,
5450                                ellipsisWidth);
5451                } else {
5452                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5453                            w, alignment, mSpacingMult, mSpacingAdd,
5454                            mIncludePad);
5455                }
5456            } else if (shouldEllipsize) {
5457                mLayout = new StaticLayout(mTransformed,
5458                            0, mTransformed.length(),
5459                            mTextPaint, w, alignment, mSpacingMult,
5460                            mSpacingAdd, mIncludePad, mEllipsize,
5461                            ellipsisWidth);
5462            } else {
5463                mLayout = new StaticLayout(mTransformed, mTextPaint,
5464                        w, alignment, mSpacingMult, mSpacingAdd,
5465                        mIncludePad);
5466            }
5467        }
5468
5469        shouldEllipsize = mEllipsize != null;
5470        mHintLayout = null;
5471
5472        if (mHint != null) {
5473            if (shouldEllipsize) hintWidth = w;
5474
5475            if (hintBoring == UNKNOWN_BORING) {
5476                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5477                                                   mHintBoring);
5478                if (hintBoring != null) {
5479                    mHintBoring = hintBoring;
5480                }
5481            }
5482
5483            if (hintBoring != null) {
5484                if (hintBoring.width <= hintWidth &&
5485                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5486                    if (mSavedHintLayout != null) {
5487                        mHintLayout = mSavedHintLayout.
5488                                replaceOrMake(mHint, mTextPaint,
5489                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5490                                hintBoring, mIncludePad);
5491                    } else {
5492                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5493                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5494                                hintBoring, mIncludePad);
5495                    }
5496
5497                    mSavedHintLayout = (BoringLayout) mHintLayout;
5498                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5499                    if (mSavedHintLayout != null) {
5500                        mHintLayout = mSavedHintLayout.
5501                                replaceOrMake(mHint, mTextPaint,
5502                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5503                                hintBoring, mIncludePad, mEllipsize,
5504                                ellipsisWidth);
5505                    } else {
5506                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5507                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5508                                hintBoring, mIncludePad, mEllipsize,
5509                                ellipsisWidth);
5510                    }
5511                } else if (shouldEllipsize) {
5512                    mHintLayout = new StaticLayout(mHint,
5513                                0, mHint.length(),
5514                                mTextPaint, hintWidth, alignment, mSpacingMult,
5515                                mSpacingAdd, mIncludePad, mEllipsize,
5516                                ellipsisWidth);
5517                } else {
5518                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5519                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5520                            mIncludePad);
5521                }
5522            } else if (shouldEllipsize) {
5523                mHintLayout = new StaticLayout(mHint,
5524                            0, mHint.length(),
5525                            mTextPaint, hintWidth, alignment, mSpacingMult,
5526                            mSpacingAdd, mIncludePad, mEllipsize,
5527                            ellipsisWidth);
5528            } else {
5529                mHintLayout = new StaticLayout(mHint, mTextPaint,
5530                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5531                        mIncludePad);
5532            }
5533        }
5534
5535        if (bringIntoView) {
5536            registerForPreDraw();
5537        }
5538
5539        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5540            if (!compressText(ellipsisWidth)) {
5541                final int height = mLayoutParams.height;
5542                // If the size of the view does not depend on the size of the text, try to
5543                // start the marquee immediately
5544                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5545                    startMarquee();
5546                } else {
5547                    // Defer the start of the marquee until we know our width (see setFrame())
5548                    mRestartMarquee = true;
5549                }
5550            }
5551        }
5552
5553        // CursorControllers need a non-null mLayout
5554        prepareCursorControllers();
5555    }
5556
5557    private boolean compressText(float width) {
5558        if (isHardwareAccelerated()) return false;
5559
5560        // Only compress the text if it hasn't been compressed by the previous pass
5561        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5562                mTextPaint.getTextScaleX() == 1.0f) {
5563            final float textWidth = mLayout.getLineWidth(0);
5564            final float overflow = (textWidth + 1.0f - width) / width;
5565            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5566                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5567                post(new Runnable() {
5568                    public void run() {
5569                        requestLayout();
5570                    }
5571                });
5572                return true;
5573            }
5574        }
5575
5576        return false;
5577    }
5578
5579    private static int desired(Layout layout) {
5580        int n = layout.getLineCount();
5581        CharSequence text = layout.getText();
5582        float max = 0;
5583
5584        // if any line was wrapped, we can't use it.
5585        // but it's ok for the last line not to have a newline
5586
5587        for (int i = 0; i < n - 1; i++) {
5588            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5589                return -1;
5590        }
5591
5592        for (int i = 0; i < n; i++) {
5593            max = Math.max(max, layout.getLineWidth(i));
5594        }
5595
5596        return (int) FloatMath.ceil(max);
5597    }
5598
5599    /**
5600     * Set whether the TextView includes extra top and bottom padding to make
5601     * room for accents that go above the normal ascent and descent.
5602     * The default is true.
5603     *
5604     * @attr ref android.R.styleable#TextView_includeFontPadding
5605     */
5606    public void setIncludeFontPadding(boolean includepad) {
5607        mIncludePad = includepad;
5608
5609        if (mLayout != null) {
5610            nullLayouts();
5611            requestLayout();
5612            invalidate();
5613        }
5614    }
5615
5616    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5617
5618    @Override
5619    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5620        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5621        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5622        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5623        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5624
5625        int width;
5626        int height;
5627
5628        BoringLayout.Metrics boring = UNKNOWN_BORING;
5629        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5630
5631        int des = -1;
5632        boolean fromexisting = false;
5633
5634        if (widthMode == MeasureSpec.EXACTLY) {
5635            // Parent has told us how big to be. So be it.
5636            width = widthSize;
5637        } else {
5638            if (mLayout != null && mEllipsize == null) {
5639                des = desired(mLayout);
5640            }
5641
5642            if (des < 0) {
5643                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5644                if (boring != null) {
5645                    mBoring = boring;
5646                }
5647            } else {
5648                fromexisting = true;
5649            }
5650
5651            if (boring == null || boring == UNKNOWN_BORING) {
5652                if (des < 0) {
5653                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5654                }
5655
5656                width = des;
5657            } else {
5658                width = boring.width;
5659            }
5660
5661            final Drawables dr = mDrawables;
5662            if (dr != null) {
5663                width = Math.max(width, dr.mDrawableWidthTop);
5664                width = Math.max(width, dr.mDrawableWidthBottom);
5665            }
5666
5667            if (mHint != null) {
5668                int hintDes = -1;
5669                int hintWidth;
5670
5671                if (mHintLayout != null && mEllipsize == null) {
5672                    hintDes = desired(mHintLayout);
5673                }
5674
5675                if (hintDes < 0) {
5676                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5677                    if (hintBoring != null) {
5678                        mHintBoring = hintBoring;
5679                    }
5680                }
5681
5682                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5683                    if (hintDes < 0) {
5684                        hintDes = (int) FloatMath.ceil(
5685                                Layout.getDesiredWidth(mHint, mTextPaint));
5686                    }
5687
5688                    hintWidth = hintDes;
5689                } else {
5690                    hintWidth = hintBoring.width;
5691                }
5692
5693                if (hintWidth > width) {
5694                    width = hintWidth;
5695                }
5696            }
5697
5698            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5699
5700            if (mMaxWidthMode == EMS) {
5701                width = Math.min(width, mMaxWidth * getLineHeight());
5702            } else {
5703                width = Math.min(width, mMaxWidth);
5704            }
5705
5706            if (mMinWidthMode == EMS) {
5707                width = Math.max(width, mMinWidth * getLineHeight());
5708            } else {
5709                width = Math.max(width, mMinWidth);
5710            }
5711
5712            // Check against our minimum width
5713            width = Math.max(width, getSuggestedMinimumWidth());
5714
5715            if (widthMode == MeasureSpec.AT_MOST) {
5716                width = Math.min(widthSize, width);
5717            }
5718        }
5719
5720        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5721        int unpaddedWidth = want;
5722        int hintWant = want;
5723
5724        if (mHorizontallyScrolling)
5725            want = VERY_WIDE;
5726
5727        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5728
5729        if (mLayout == null) {
5730            makeNewLayout(want, hintWant, boring, hintBoring,
5731                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5732        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5733                   (mLayout.getEllipsizedWidth() !=
5734                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5735            if (mHint == null && mEllipsize == null &&
5736                    want > mLayout.getWidth() &&
5737                    (mLayout instanceof BoringLayout ||
5738                            (fromexisting && des >= 0 && des <= want))) {
5739                mLayout.increaseWidthTo(want);
5740            } else {
5741                makeNewLayout(want, hintWant, boring, hintBoring,
5742                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5743            }
5744        } else {
5745            // Width has not changed.
5746        }
5747
5748        if (heightMode == MeasureSpec.EXACTLY) {
5749            // Parent has told us how big to be. So be it.
5750            height = heightSize;
5751            mDesiredHeightAtMeasure = -1;
5752        } else {
5753            int desired = getDesiredHeight();
5754
5755            height = desired;
5756            mDesiredHeightAtMeasure = desired;
5757
5758            if (heightMode == MeasureSpec.AT_MOST) {
5759                height = Math.min(desired, heightSize);
5760            }
5761        }
5762
5763        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5764        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5765            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5766        }
5767
5768        /*
5769         * We didn't let makeNewLayout() register to bring the cursor into view,
5770         * so do it here if there is any possibility that it is needed.
5771         */
5772        if (mMovement != null ||
5773            mLayout.getWidth() > unpaddedWidth ||
5774            mLayout.getHeight() > unpaddedHeight) {
5775            registerForPreDraw();
5776        } else {
5777            scrollTo(0, 0);
5778        }
5779
5780        setMeasuredDimension(width, height);
5781    }
5782
5783    private int getDesiredHeight() {
5784        return Math.max(
5785                getDesiredHeight(mLayout, true),
5786                getDesiredHeight(mHintLayout, mEllipsize != null));
5787    }
5788
5789    private int getDesiredHeight(Layout layout, boolean cap) {
5790        if (layout == null) {
5791            return 0;
5792        }
5793
5794        int linecount = layout.getLineCount();
5795        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5796        int desired = layout.getLineTop(linecount);
5797
5798        final Drawables dr = mDrawables;
5799        if (dr != null) {
5800            desired = Math.max(desired, dr.mDrawableHeightLeft);
5801            desired = Math.max(desired, dr.mDrawableHeightRight);
5802        }
5803
5804        desired += pad;
5805
5806        if (mMaxMode == LINES) {
5807            /*
5808             * Don't cap the hint to a certain number of lines.
5809             * (Do cap it, though, if we have a maximum pixel height.)
5810             */
5811            if (cap) {
5812                if (linecount > mMaximum) {
5813                    desired = layout.getLineTop(mMaximum) +
5814                              layout.getBottomPadding();
5815
5816                    if (dr != null) {
5817                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5818                        desired = Math.max(desired, dr.mDrawableHeightRight);
5819                    }
5820
5821                    desired += pad;
5822                    linecount = mMaximum;
5823                }
5824            }
5825        } else {
5826            desired = Math.min(desired, mMaximum);
5827        }
5828
5829        if (mMinMode == LINES) {
5830            if (linecount < mMinimum) {
5831                desired += getLineHeight() * (mMinimum - linecount);
5832            }
5833        } else {
5834            desired = Math.max(desired, mMinimum);
5835        }
5836
5837        // Check against our minimum height
5838        desired = Math.max(desired, getSuggestedMinimumHeight());
5839
5840        return desired;
5841    }
5842
5843    /**
5844     * Check whether a change to the existing text layout requires a
5845     * new view layout.
5846     */
5847    private void checkForResize() {
5848        boolean sizeChanged = false;
5849
5850        if (mLayout != null) {
5851            // Check if our width changed
5852            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5853                sizeChanged = true;
5854                invalidate();
5855            }
5856
5857            // Check if our height changed
5858            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5859                int desiredHeight = getDesiredHeight();
5860
5861                if (desiredHeight != this.getHeight()) {
5862                    sizeChanged = true;
5863                }
5864            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5865                if (mDesiredHeightAtMeasure >= 0) {
5866                    int desiredHeight = getDesiredHeight();
5867
5868                    if (desiredHeight != mDesiredHeightAtMeasure) {
5869                        sizeChanged = true;
5870                    }
5871                }
5872            }
5873        }
5874
5875        if (sizeChanged) {
5876            requestLayout();
5877            // caller will have already invalidated
5878        }
5879    }
5880
5881    /**
5882     * Check whether entirely new text requires a new view layout
5883     * or merely a new text layout.
5884     */
5885    private void checkForRelayout() {
5886        // If we have a fixed width, we can just swap in a new text layout
5887        // if the text height stays the same or if the view height is fixed.
5888
5889        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5890                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5891                (mHint == null || mHintLayout != null) &&
5892                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5893            // Static width, so try making a new text layout.
5894
5895            int oldht = mLayout.getHeight();
5896            int want = mLayout.getWidth();
5897            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5898
5899            /*
5900             * No need to bring the text into view, since the size is not
5901             * changing (unless we do the requestLayout(), in which case it
5902             * will happen at measure).
5903             */
5904            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5905                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5906                          false);
5907
5908            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5909                // In a fixed-height view, so use our new text layout.
5910                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5911                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5912                    invalidate();
5913                    return;
5914                }
5915
5916                // Dynamic height, but height has stayed the same,
5917                // so use our new text layout.
5918                if (mLayout.getHeight() == oldht &&
5919                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5920                    invalidate();
5921                    return;
5922                }
5923            }
5924
5925            // We lose: the height has changed and we have a dynamic height.
5926            // Request a new view layout using our new text layout.
5927            requestLayout();
5928            invalidate();
5929        } else {
5930            // Dynamic width, so we have no choice but to request a new
5931            // view layout with a new text layout.
5932
5933            nullLayouts();
5934            requestLayout();
5935            invalidate();
5936        }
5937    }
5938
5939    /**
5940     * Returns true if anything changed.
5941     */
5942    private boolean bringTextIntoView() {
5943        int line = 0;
5944        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5945            line = mLayout.getLineCount() - 1;
5946        }
5947
5948        Layout.Alignment a = mLayout.getParagraphAlignment(line);
5949        int dir = mLayout.getParagraphDirection(line);
5950        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5951        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5952        int ht = mLayout.getHeight();
5953
5954        int scrollx, scrolly;
5955
5956        if (a == Layout.Alignment.ALIGN_CENTER) {
5957            /*
5958             * Keep centered if possible, or, if it is too wide to fit,
5959             * keep leading edge in view.
5960             */
5961
5962            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5963            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5964
5965            if (right - left < hspace) {
5966                scrollx = (right + left) / 2 - hspace / 2;
5967            } else {
5968                if (dir < 0) {
5969                    scrollx = right - hspace;
5970                } else {
5971                    scrollx = left;
5972                }
5973            }
5974        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
5975            /*
5976             * Keep leading edge in view.
5977             */
5978
5979            if (dir < 0) {
5980                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5981                scrollx = right - hspace;
5982            } else {
5983                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5984            }
5985        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
5986            /*
5987             * Keep trailing edge in view.
5988             */
5989
5990            if (dir < 0) {
5991                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
5992            } else {
5993                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5994                scrollx = right - hspace;
5995            }
5996        }
5997
5998        if (ht < vspace) {
5999            scrolly = 0;
6000        } else {
6001            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6002                scrolly = ht - vspace;
6003            } else {
6004                scrolly = 0;
6005            }
6006        }
6007
6008        if (scrollx != mScrollX || scrolly != mScrollY) {
6009            scrollTo(scrollx, scrolly);
6010            return true;
6011        } else {
6012            return false;
6013        }
6014    }
6015
6016    /**
6017     * Move the point, specified by the offset, into the view if it is needed.
6018     * This has to be called after layout. Returns true if anything changed.
6019     */
6020    public boolean bringPointIntoView(int offset) {
6021        boolean changed = false;
6022
6023        int line = mLayout.getLineForOffset(offset);
6024
6025        // FIXME: Is it okay to truncate this, or should we round?
6026        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6027        final int top = mLayout.getLineTop(line);
6028        final int bottom = mLayout.getLineTop(line + 1);
6029
6030        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6031        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6032        int ht = mLayout.getHeight();
6033
6034        int grav;
6035
6036        switch (mLayout.getParagraphAlignment(line)) {
6037            case ALIGN_NORMAL:
6038                grav = 1;
6039                break;
6040
6041            case ALIGN_OPPOSITE:
6042                grav = -1;
6043                break;
6044
6045            default:
6046                grav = 0;
6047        }
6048
6049        grav *= mLayout.getParagraphDirection(line);
6050
6051        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6052        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6053
6054        int hslack = (bottom - top) / 2;
6055        int vslack = hslack;
6056
6057        if (vslack > vspace / 4)
6058            vslack = vspace / 4;
6059        if (hslack > hspace / 4)
6060            hslack = hspace / 4;
6061
6062        int hs = mScrollX;
6063        int vs = mScrollY;
6064
6065        if (top - vs < vslack)
6066            vs = top - vslack;
6067        if (bottom - vs > vspace - vslack)
6068            vs = bottom - (vspace - vslack);
6069        if (ht - vs < vspace)
6070            vs = ht - vspace;
6071        if (0 - vs > 0)
6072            vs = 0;
6073
6074        if (grav != 0) {
6075            if (x - hs < hslack) {
6076                hs = x - hslack;
6077            }
6078            if (x - hs > hspace - hslack) {
6079                hs = x - (hspace - hslack);
6080            }
6081        }
6082
6083        if (grav < 0) {
6084            if (left - hs > 0)
6085                hs = left;
6086            if (right - hs < hspace)
6087                hs = right - hspace;
6088        } else if (grav > 0) {
6089            if (right - hs < hspace)
6090                hs = right - hspace;
6091            if (left - hs > 0)
6092                hs = left;
6093        } else /* grav == 0 */ {
6094            if (right - left <= hspace) {
6095                /*
6096                 * If the entire text fits, center it exactly.
6097                 */
6098                hs = left - (hspace - (right - left)) / 2;
6099            } else if (x > right - hslack) {
6100                /*
6101                 * If we are near the right edge, keep the right edge
6102                 * at the edge of the view.
6103                 */
6104                hs = right - hspace;
6105            } else if (x < left + hslack) {
6106                /*
6107                 * If we are near the left edge, keep the left edge
6108                 * at the edge of the view.
6109                 */
6110                hs = left;
6111            } else if (left > hs) {
6112                /*
6113                 * Is there whitespace visible at the left?  Fix it if so.
6114                 */
6115                hs = left;
6116            } else if (right < hs + hspace) {
6117                /*
6118                 * Is there whitespace visible at the right?  Fix it if so.
6119                 */
6120                hs = right - hspace;
6121            } else {
6122                /*
6123                 * Otherwise, float as needed.
6124                 */
6125                if (x - hs < hslack) {
6126                    hs = x - hslack;
6127                }
6128                if (x - hs > hspace - hslack) {
6129                    hs = x - (hspace - hslack);
6130                }
6131            }
6132        }
6133
6134        if (hs != mScrollX || vs != mScrollY) {
6135            if (mScroller == null) {
6136                scrollTo(hs, vs);
6137            } else {
6138                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6139                int dx = hs - mScrollX;
6140                int dy = vs - mScrollY;
6141
6142                if (duration > ANIMATED_SCROLL_GAP) {
6143                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6144                    awakenScrollBars(mScroller.getDuration());
6145                    invalidate();
6146                } else {
6147                    if (!mScroller.isFinished()) {
6148                        mScroller.abortAnimation();
6149                    }
6150
6151                    scrollBy(dx, dy);
6152                }
6153
6154                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6155            }
6156
6157            changed = true;
6158        }
6159
6160        if (isFocused()) {
6161            // This offsets because getInterestingRect() is in terms of
6162            // viewport coordinates, but requestRectangleOnScreen()
6163            // is in terms of content coordinates.
6164
6165            Rect r = new Rect(x, top, x + 1, bottom);
6166            getInterestingRect(r, line);
6167            r.offset(mScrollX, mScrollY);
6168
6169            if (requestRectangleOnScreen(r)) {
6170                changed = true;
6171            }
6172        }
6173
6174        return changed;
6175    }
6176
6177    /**
6178     * Move the cursor, if needed, so that it is at an offset that is visible
6179     * to the user.  This will not move the cursor if it represents more than
6180     * one character (a selection range).  This will only work if the
6181     * TextView contains spannable text; otherwise it will do nothing.
6182     *
6183     * @return True if the cursor was actually moved, false otherwise.
6184     */
6185    public boolean moveCursorToVisibleOffset() {
6186        if (!(mText instanceof Spannable)) {
6187            return false;
6188        }
6189        int start = getSelectionStart();
6190        int end = getSelectionEnd();
6191        if (start != end) {
6192            return false;
6193        }
6194
6195        // First: make sure the line is visible on screen:
6196
6197        int line = mLayout.getLineForOffset(start);
6198
6199        final int top = mLayout.getLineTop(line);
6200        final int bottom = mLayout.getLineTop(line + 1);
6201        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6202        int vslack = (bottom - top) / 2;
6203        if (vslack > vspace / 4)
6204            vslack = vspace / 4;
6205        final int vs = mScrollY;
6206
6207        if (top < (vs+vslack)) {
6208            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6209        } else if (bottom > (vspace+vs-vslack)) {
6210            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6211        }
6212
6213        // Next: make sure the character is visible on screen:
6214
6215        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6216        final int hs = mScrollX;
6217        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6218        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6219
6220        // line might contain bidirectional text
6221        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6222        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6223
6224        int newStart = start;
6225        if (newStart < lowChar) {
6226            newStart = lowChar;
6227        } else if (newStart > highChar) {
6228            newStart = highChar;
6229        }
6230
6231        if (newStart != start) {
6232            Selection.setSelection((Spannable)mText, newStart);
6233            return true;
6234        }
6235
6236        return false;
6237    }
6238
6239    @Override
6240    public void computeScroll() {
6241        if (mScroller != null) {
6242            if (mScroller.computeScrollOffset()) {
6243                mScrollX = mScroller.getCurrX();
6244                mScrollY = mScroller.getCurrY();
6245                postInvalidate();  // So we draw again
6246            }
6247        }
6248    }
6249
6250    private void getInterestingRect(Rect r, int line) {
6251        convertFromViewportToContentCoordinates(r);
6252
6253        // Rectangle can can be expanded on first and last line to take
6254        // padding into account.
6255        // TODO Take left/right padding into account too?
6256        if (line == 0) r.top -= getExtendedPaddingTop();
6257        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6258    }
6259
6260    private void convertFromViewportToContentCoordinates(Rect r) {
6261        final int horizontalOffset = viewportToContentHorizontalOffset();
6262        r.left += horizontalOffset;
6263        r.right += horizontalOffset;
6264
6265        final int verticalOffset = viewportToContentVerticalOffset();
6266        r.top += verticalOffset;
6267        r.bottom += verticalOffset;
6268    }
6269
6270    private int viewportToContentHorizontalOffset() {
6271        return getCompoundPaddingLeft() - mScrollX;
6272    }
6273
6274    private int viewportToContentVerticalOffset() {
6275        int offset = getExtendedPaddingTop() - mScrollY;
6276        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6277            offset += getVerticalOffset(false);
6278        }
6279        return offset;
6280    }
6281
6282    @Override
6283    public void debug(int depth) {
6284        super.debug(depth);
6285
6286        String output = debugIndent(depth);
6287        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6288                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6289                + "} ";
6290
6291        if (mText != null) {
6292
6293            output += "mText=\"" + mText + "\" ";
6294            if (mLayout != null) {
6295                output += "mLayout width=" + mLayout.getWidth()
6296                        + " height=" + mLayout.getHeight();
6297            }
6298        } else {
6299            output += "mText=NULL";
6300        }
6301        Log.d(VIEW_LOG_TAG, output);
6302    }
6303
6304    /**
6305     * Convenience for {@link Selection#getSelectionStart}.
6306     */
6307    @ViewDebug.ExportedProperty(category = "text")
6308    public int getSelectionStart() {
6309        return Selection.getSelectionStart(getText());
6310    }
6311
6312    /**
6313     * Convenience for {@link Selection#getSelectionEnd}.
6314     */
6315    @ViewDebug.ExportedProperty(category = "text")
6316    public int getSelectionEnd() {
6317        return Selection.getSelectionEnd(getText());
6318    }
6319
6320    /**
6321     * Return true iff there is a selection inside this text view.
6322     */
6323    public boolean hasSelection() {
6324        final int selectionStart = getSelectionStart();
6325        final int selectionEnd = getSelectionEnd();
6326
6327        return selectionStart >= 0 && selectionStart != selectionEnd;
6328    }
6329
6330    /**
6331     * Sets the properties of this field (lines, horizontally scrolling,
6332     * transformation method) to be for a single-line input.
6333     *
6334     * @attr ref android.R.styleable#TextView_singleLine
6335     */
6336    public void setSingleLine() {
6337        setSingleLine(true);
6338    }
6339
6340    /**
6341     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6342     * transformation method) to be for a single-line input; if false, restores these to the default
6343     * conditions.
6344     *
6345     * Note that the default conditions are not necessarily those that were in effect prior this
6346     * method, and you may want to reset these properties to your custom values.
6347     *
6348     * @attr ref android.R.styleable#TextView_singleLine
6349     */
6350    @android.view.RemotableViewMethod
6351    public void setSingleLine(boolean singleLine) {
6352        // Could be used, but may break backward compatibility.
6353        // if (mSingleLine == singleLine) return;
6354        setInputTypeSingleLine(singleLine);
6355        applySingleLine(singleLine, true, true);
6356    }
6357
6358    /**
6359     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6360     * @param singleLine
6361     */
6362    private void setInputTypeSingleLine(boolean singleLine) {
6363        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6364            if (singleLine) {
6365                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6366            } else {
6367                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6368            }
6369        }
6370    }
6371
6372    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6373            boolean changeMaxLines) {
6374        mSingleLine = singleLine;
6375        if (singleLine) {
6376            setLines(1);
6377            setHorizontallyScrolling(true);
6378            if (applyTransformation) {
6379                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6380            }
6381            // TODO setState
6382        } else {
6383            if (changeMaxLines) {
6384                setMaxLines(Integer.MAX_VALUE);
6385            }
6386            setHorizontallyScrolling(false);
6387            if (applyTransformation) {
6388                setTransformationMethod(null);
6389            }
6390            // TODO setState
6391        }
6392    }
6393
6394    /**
6395     * Causes words in the text that are longer than the view is wide
6396     * to be ellipsized instead of broken in the middle.  You may also
6397     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6398     * to constrain the text to a single line.  Use <code>null</code>
6399     * to turn off ellipsizing.
6400     *
6401     * @attr ref android.R.styleable#TextView_ellipsize
6402     */
6403    public void setEllipsize(TextUtils.TruncateAt where) {
6404        mEllipsize = where;
6405
6406        if (mLayout != null) {
6407            nullLayouts();
6408            requestLayout();
6409            invalidate();
6410        }
6411    }
6412
6413    /**
6414     * Sets how many times to repeat the marquee animation. Only applied if the
6415     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6416     *
6417     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6418     */
6419    public void setMarqueeRepeatLimit(int marqueeLimit) {
6420        mMarqueeRepeatLimit = marqueeLimit;
6421    }
6422
6423    /**
6424     * Returns where, if anywhere, words that are longer than the view
6425     * is wide should be ellipsized.
6426     */
6427    @ViewDebug.ExportedProperty
6428    public TextUtils.TruncateAt getEllipsize() {
6429        return mEllipsize;
6430    }
6431
6432    /**
6433     * Set the TextView so that when it takes focus, all the text is
6434     * selected.
6435     *
6436     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6437     */
6438    @android.view.RemotableViewMethod
6439    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6440        mSelectAllOnFocus = selectAllOnFocus;
6441
6442        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6443            setText(mText, BufferType.SPANNABLE);
6444        }
6445    }
6446
6447    /**
6448     * Set whether the cursor is visible.  The default is true.
6449     *
6450     * @attr ref android.R.styleable#TextView_cursorVisible
6451     */
6452    @android.view.RemotableViewMethod
6453    public void setCursorVisible(boolean visible) {
6454        mCursorVisible = visible;
6455        invalidate();
6456
6457        makeBlink();
6458
6459        // InsertionPointCursorController depends on mCursorVisible
6460        prepareCursorControllers();
6461    }
6462
6463    private boolean canMarquee() {
6464        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6465        return width > 0 && mLayout.getLineWidth(0) > width;
6466    }
6467
6468    private void startMarquee() {
6469        // Do not ellipsize EditText
6470        if (mInput != null) return;
6471
6472        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6473            return;
6474        }
6475
6476        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6477                getLineCount() == 1 && canMarquee()) {
6478
6479            if (mMarquee == null) mMarquee = new Marquee(this);
6480            mMarquee.start(mMarqueeRepeatLimit);
6481        }
6482    }
6483
6484    private void stopMarquee() {
6485        if (mMarquee != null && !mMarquee.isStopped()) {
6486            mMarquee.stop();
6487        }
6488    }
6489
6490    private void startStopMarquee(boolean start) {
6491        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6492            if (start) {
6493                startMarquee();
6494            } else {
6495                stopMarquee();
6496            }
6497        }
6498    }
6499
6500    private static final class Marquee extends Handler {
6501        // TODO: Add an option to configure this
6502        private static final float MARQUEE_DELTA_MAX = 0.07f;
6503        private static final int MARQUEE_DELAY = 1200;
6504        private static final int MARQUEE_RESTART_DELAY = 1200;
6505        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6506        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6507
6508        private static final byte MARQUEE_STOPPED = 0x0;
6509        private static final byte MARQUEE_STARTING = 0x1;
6510        private static final byte MARQUEE_RUNNING = 0x2;
6511
6512        private static final int MESSAGE_START = 0x1;
6513        private static final int MESSAGE_TICK = 0x2;
6514        private static final int MESSAGE_RESTART = 0x3;
6515
6516        private final WeakReference<TextView> mView;
6517
6518        private byte mStatus = MARQUEE_STOPPED;
6519        private final float mScrollUnit;
6520        private float mMaxScroll;
6521        float mMaxFadeScroll;
6522        private float mGhostStart;
6523        private float mGhostOffset;
6524        private float mFadeStop;
6525        private int mRepeatLimit;
6526
6527        float mScroll;
6528
6529        Marquee(TextView v) {
6530            final float density = v.getContext().getResources().getDisplayMetrics().density;
6531            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6532            mView = new WeakReference<TextView>(v);
6533        }
6534
6535        @Override
6536        public void handleMessage(Message msg) {
6537            switch (msg.what) {
6538                case MESSAGE_START:
6539                    mStatus = MARQUEE_RUNNING;
6540                    tick();
6541                    break;
6542                case MESSAGE_TICK:
6543                    tick();
6544                    break;
6545                case MESSAGE_RESTART:
6546                    if (mStatus == MARQUEE_RUNNING) {
6547                        if (mRepeatLimit >= 0) {
6548                            mRepeatLimit--;
6549                        }
6550                        start(mRepeatLimit);
6551                    }
6552                    break;
6553            }
6554        }
6555
6556        void tick() {
6557            if (mStatus != MARQUEE_RUNNING) {
6558                return;
6559            }
6560
6561            removeMessages(MESSAGE_TICK);
6562
6563            final TextView textView = mView.get();
6564            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6565                mScroll += mScrollUnit;
6566                if (mScroll > mMaxScroll) {
6567                    mScroll = mMaxScroll;
6568                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6569                } else {
6570                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6571                }
6572                textView.invalidate();
6573            }
6574        }
6575
6576        void stop() {
6577            mStatus = MARQUEE_STOPPED;
6578            removeMessages(MESSAGE_START);
6579            removeMessages(MESSAGE_RESTART);
6580            removeMessages(MESSAGE_TICK);
6581            resetScroll();
6582        }
6583
6584        private void resetScroll() {
6585            mScroll = 0.0f;
6586            final TextView textView = mView.get();
6587            if (textView != null) textView.invalidate();
6588        }
6589
6590        void start(int repeatLimit) {
6591            if (repeatLimit == 0) {
6592                stop();
6593                return;
6594            }
6595            mRepeatLimit = repeatLimit;
6596            final TextView textView = mView.get();
6597            if (textView != null && textView.mLayout != null) {
6598                mStatus = MARQUEE_STARTING;
6599                mScroll = 0.0f;
6600                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6601                        textView.getCompoundPaddingRight();
6602                final float lineWidth = textView.mLayout.getLineWidth(0);
6603                final float gap = textWidth / 3.0f;
6604                mGhostStart = lineWidth - textWidth + gap;
6605                mMaxScroll = mGhostStart + textWidth;
6606                mGhostOffset = lineWidth + gap;
6607                mFadeStop = lineWidth + textWidth / 6.0f;
6608                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6609
6610                textView.invalidate();
6611                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6612            }
6613        }
6614
6615        float getGhostOffset() {
6616            return mGhostOffset;
6617        }
6618
6619        boolean shouldDrawLeftFade() {
6620            return mScroll <= mFadeStop;
6621        }
6622
6623        boolean shouldDrawGhost() {
6624            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6625        }
6626
6627        boolean isRunning() {
6628            return mStatus == MARQUEE_RUNNING;
6629        }
6630
6631        boolean isStopped() {
6632            return mStatus == MARQUEE_STOPPED;
6633        }
6634    }
6635
6636    /**
6637     * This method is called when the text is changed, in case any
6638     * subclasses would like to know.
6639     *
6640     * @param text The text the TextView is displaying.
6641     * @param start The offset of the start of the range of the text
6642     *              that was modified.
6643     * @param before The offset of the former end of the range of the
6644     *               text that was modified.  If text was simply inserted,
6645     *               this will be the same as <code>start</code>.
6646     *               If text was replaced with new text or deleted, the
6647     *               length of the old text was <code>before-start</code>.
6648     * @param after The offset of the end of the range of the text
6649     *              that was modified.  If text was simply deleted,
6650     *              this will be the same as <code>start</code>.
6651     *              If text was replaced with new text or inserted,
6652     *              the length of the new text is <code>after-start</code>.
6653     */
6654    protected void onTextChanged(CharSequence text,
6655                                 int start, int before, int after) {
6656    }
6657
6658    /**
6659     * This method is called when the selection has changed, in case any
6660     * subclasses would like to know.
6661     *
6662     * @param selStart The new selection start location.
6663     * @param selEnd The new selection end location.
6664     */
6665    protected void onSelectionChanged(int selStart, int selEnd) {
6666    }
6667
6668    /**
6669     * Adds a TextWatcher to the list of those whose methods are called
6670     * whenever this TextView's text changes.
6671     * <p>
6672     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6673     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6674     * if there are any text changed listeners forces the buffer type to
6675     * Editable if it would not otherwise be and does call this method.
6676     */
6677    public void addTextChangedListener(TextWatcher watcher) {
6678        if (mListeners == null) {
6679            mListeners = new ArrayList<TextWatcher>();
6680        }
6681
6682        mListeners.add(watcher);
6683    }
6684
6685    /**
6686     * Removes the specified TextWatcher from the list of those whose
6687     * methods are called
6688     * whenever this TextView's text changes.
6689     */
6690    public void removeTextChangedListener(TextWatcher watcher) {
6691        if (mListeners != null) {
6692            int i = mListeners.indexOf(watcher);
6693
6694            if (i >= 0) {
6695                mListeners.remove(i);
6696            }
6697        }
6698    }
6699
6700    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6701                                   int after) {
6702        if (mListeners != null) {
6703            final ArrayList<TextWatcher> list = mListeners;
6704            final int count = list.size();
6705            for (int i = 0; i < count; i++) {
6706                list.get(i).beforeTextChanged(text, start, before, after);
6707            }
6708        }
6709    }
6710
6711    /**
6712     * Not private so it can be called from an inner class without going
6713     * through a thunk.
6714     */
6715    void sendOnTextChanged(CharSequence text, int start, int before,
6716                                   int after) {
6717        if (mListeners != null) {
6718            final ArrayList<TextWatcher> list = mListeners;
6719            final int count = list.size();
6720            for (int i = 0; i < count; i++) {
6721                list.get(i).onTextChanged(text, start, before, after);
6722            }
6723        }
6724    }
6725
6726    /**
6727     * Not private so it can be called from an inner class without going
6728     * through a thunk.
6729     */
6730    void sendAfterTextChanged(Editable text) {
6731        if (mListeners != null) {
6732            final ArrayList<TextWatcher> list = mListeners;
6733            final int count = list.size();
6734            for (int i = 0; i < count; i++) {
6735                list.get(i).afterTextChanged(text);
6736            }
6737        }
6738    }
6739
6740    /**
6741     * Not private so it can be called from an inner class without going
6742     * through a thunk.
6743     */
6744    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
6745        final InputMethodState ims = mInputMethodState;
6746        if (ims == null || ims.mBatchEditNesting == 0) {
6747            updateAfterEdit();
6748        }
6749        if (ims != null) {
6750            ims.mContentChanged = true;
6751            if (ims.mChangedStart < 0) {
6752                ims.mChangedStart = start;
6753                ims.mChangedEnd = start+before;
6754            } else {
6755                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6756                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6757            }
6758            ims.mChangedDelta += after-before;
6759        }
6760
6761        sendOnTextChanged(buffer, start, before, after);
6762        onTextChanged(buffer, start, before, after);
6763
6764        // Hide the controller if the amount of content changed
6765        if (before != after) {
6766            hideControllers();
6767        }
6768    }
6769
6770    /**
6771     * Not private so it can be called from an inner class without going
6772     * through a thunk.
6773     */
6774    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
6775        // XXX Make the start and end move together if this ends up
6776        // spending too much time invalidating.
6777
6778        boolean selChanged = false;
6779        int newSelStart=-1, newSelEnd=-1;
6780
6781        final InputMethodState ims = mInputMethodState;
6782
6783        if (what == Selection.SELECTION_END) {
6784            mHighlightPathBogus = true;
6785            selChanged = true;
6786            newSelEnd = newStart;
6787
6788            if (!isFocused()) {
6789                mSelectionMoved = true;
6790            }
6791
6792            if (oldStart >= 0 || newStart >= 0) {
6793                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6794                registerForPreDraw();
6795
6796                if (isFocused()) {
6797                    mShowCursor = SystemClock.uptimeMillis();
6798                    makeBlink();
6799                }
6800            }
6801        }
6802
6803        if (what == Selection.SELECTION_START) {
6804            mHighlightPathBogus = true;
6805            selChanged = true;
6806            newSelStart = newStart;
6807
6808            if (!isFocused()) {
6809                mSelectionMoved = true;
6810            }
6811
6812            if (oldStart >= 0 || newStart >= 0) {
6813                int end = Selection.getSelectionEnd(buf);
6814                invalidateCursor(end, oldStart, newStart);
6815            }
6816        }
6817
6818        if (selChanged) {
6819            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6820                if (newSelStart < 0) {
6821                    newSelStart = Selection.getSelectionStart(buf);
6822                }
6823                if (newSelEnd < 0) {
6824                    newSelEnd = Selection.getSelectionEnd(buf);
6825                }
6826                onSelectionChanged(newSelStart, newSelEnd);
6827            }
6828        }
6829
6830        if (what instanceof UpdateAppearance ||
6831            what instanceof ParagraphStyle) {
6832            if (ims == null || ims.mBatchEditNesting == 0) {
6833                invalidate();
6834                mHighlightPathBogus = true;
6835                checkForResize();
6836            } else {
6837                ims.mContentChanged = true;
6838            }
6839        }
6840
6841        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6842            mHighlightPathBogus = true;
6843            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6844                ims.mSelectionModeChanged = true;
6845            }
6846
6847            if (Selection.getSelectionStart(buf) >= 0) {
6848                if (ims == null || ims.mBatchEditNesting == 0) {
6849                    invalidateCursor();
6850                } else {
6851                    ims.mCursorChanged = true;
6852                }
6853            }
6854        }
6855
6856        if (what instanceof ParcelableSpan) {
6857            // If this is a span that can be sent to a remote process,
6858            // the current extract editor would be interested in it.
6859            if (ims != null && ims.mExtracting != null) {
6860                if (ims.mBatchEditNesting != 0) {
6861                    if (oldStart >= 0) {
6862                        if (ims.mChangedStart > oldStart) {
6863                            ims.mChangedStart = oldStart;
6864                        }
6865                        if (ims.mChangedStart > oldEnd) {
6866                            ims.mChangedStart = oldEnd;
6867                        }
6868                    }
6869                    if (newStart >= 0) {
6870                        if (ims.mChangedStart > newStart) {
6871                            ims.mChangedStart = newStart;
6872                        }
6873                        if (ims.mChangedStart > newEnd) {
6874                            ims.mChangedStart = newEnd;
6875                        }
6876                    }
6877                } else {
6878                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6879                            + oldStart + "-" + oldEnd + ","
6880                            + newStart + "-" + newEnd + what);
6881                    ims.mContentChanged = true;
6882                }
6883            }
6884        }
6885    }
6886
6887    private class ChangeWatcher
6888    implements TextWatcher, SpanWatcher {
6889
6890        private CharSequence mBeforeText;
6891
6892        public void beforeTextChanged(CharSequence buffer, int start,
6893                                      int before, int after) {
6894            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6895                    + " before=" + before + " after=" + after + ": " + buffer);
6896
6897            if (AccessibilityManager.getInstance(mContext).isEnabled()
6898                    && !isPasswordInputType(mInputType)
6899                    && !hasPasswordTransformationMethod()) {
6900                mBeforeText = buffer.toString();
6901            }
6902
6903            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6904        }
6905
6906        public void onTextChanged(CharSequence buffer, int start,
6907                                  int before, int after) {
6908            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6909                    + " before=" + before + " after=" + after + ": " + buffer);
6910            TextView.this.handleTextChanged(buffer, start, before, after);
6911
6912            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6913                    (isFocused() || isSelected() &&
6914                    isShown())) {
6915                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6916                mBeforeText = null;
6917            }
6918        }
6919
6920        public void afterTextChanged(Editable buffer) {
6921            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6922            TextView.this.sendAfterTextChanged(buffer);
6923
6924            if (MetaKeyKeyListener.getMetaState(buffer,
6925                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6926                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6927            }
6928        }
6929
6930        public void onSpanChanged(Spannable buf,
6931                                  Object what, int s, int e, int st, int en) {
6932            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6933                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6934            TextView.this.spanChange(buf, what, s, st, e, en);
6935        }
6936
6937        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6938            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6939                    + " what=" + what + ": " + buf);
6940            TextView.this.spanChange(buf, what, -1, s, -1, e);
6941        }
6942
6943        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
6944            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
6945                    + " what=" + what + ": " + buf);
6946            TextView.this.spanChange(buf, what, s, -1, e, -1);
6947        }
6948    }
6949
6950    private void makeBlink() {
6951        if (!mCursorVisible || !isTextEditable()) {
6952            if (mBlink != null) {
6953                mBlink.removeCallbacks(mBlink);
6954            }
6955
6956            return;
6957        }
6958
6959        if (mBlink == null)
6960            mBlink = new Blink(this);
6961
6962        mBlink.removeCallbacks(mBlink);
6963        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
6964    }
6965
6966    /**
6967     * @hide
6968     */
6969    @Override
6970    public void dispatchFinishTemporaryDetach() {
6971        mDispatchTemporaryDetach = true;
6972        super.dispatchFinishTemporaryDetach();
6973        mDispatchTemporaryDetach = false;
6974    }
6975
6976    @Override
6977    public void onStartTemporaryDetach() {
6978        super.onStartTemporaryDetach();
6979        // Only track when onStartTemporaryDetach() is called directly,
6980        // usually because this instance is an editable field in a list
6981        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
6982    }
6983
6984    @Override
6985    public void onFinishTemporaryDetach() {
6986        super.onFinishTemporaryDetach();
6987        // Only track when onStartTemporaryDetach() is called directly,
6988        // usually because this instance is an editable field in a list
6989        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
6990    }
6991
6992    @Override
6993    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
6994        if (mTemporaryDetach) {
6995            // If we are temporarily in the detach state, then do nothing.
6996            super.onFocusChanged(focused, direction, previouslyFocusedRect);
6997            return;
6998        }
6999
7000        mShowCursor = SystemClock.uptimeMillis();
7001
7002        ensureEndedBatchEdit();
7003
7004        if (focused) {
7005            int selStart = getSelectionStart();
7006            int selEnd = getSelectionEnd();
7007
7008            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7009            // mode for these, unless there was a specific selection already started.
7010            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7011                    selEnd == mText.length();
7012            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7013
7014            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7015                // If a tap was used to give focus to that view, move cursor at tap position.
7016                // Has to be done before onTakeFocus, which can be overloaded.
7017                final int lastTapPosition = getLastTapPosition();
7018                if (lastTapPosition >= 0) {
7019                    Selection.setSelection((Spannable) mText, lastTapPosition);
7020                }
7021
7022                if (mMovement != null) {
7023                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7024                }
7025
7026                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7027                // pressed. Since it is the ViewRoot's mView, it requests focus before
7028                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7029                // This special case ensure that we keep current selection in that case.
7030                // It would be better to know why the DecorView does not have focus at that time.
7031                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7032                        selStart >= 0 && selEnd >= 0) {
7033                    /*
7034                     * Someone intentionally set the selection, so let them
7035                     * do whatever it is that they wanted to do instead of
7036                     * the default on-focus behavior.  We reset the selection
7037                     * here instead of just skipping the onTakeFocus() call
7038                     * because some movement methods do something other than
7039                     * just setting the selection in theirs and we still
7040                     * need to go through that path.
7041                     */
7042                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7043                }
7044
7045                if (mSelectAllOnFocus) {
7046                    selectAll();
7047                }
7048
7049                mTouchFocusSelected = true;
7050            }
7051
7052            mFrozenWithFocus = false;
7053            mSelectionMoved = false;
7054
7055            if (mText instanceof Spannable) {
7056                Spannable sp = (Spannable) mText;
7057                MetaKeyKeyListener.resetMetaState(sp);
7058            }
7059
7060            makeBlink();
7061
7062            if (mError != null) {
7063                showError();
7064            }
7065        } else {
7066            if (mError != null) {
7067                hideError();
7068            }
7069            // Don't leave us in the middle of a batch edit.
7070            onEndBatchEdit();
7071
7072            hideInsertionPointCursorController();
7073            if (this instanceof ExtractEditText) {
7074                // terminateTextSelectionMode removes selection, which we want to keep when
7075                // ExtractEditText goes out of focus.
7076                final int selStart = getSelectionStart();
7077                final int selEnd = getSelectionEnd();
7078                terminateSelectionActionMode();
7079                Selection.setSelection((Spannable) mText, selStart, selEnd);
7080            } else {
7081                terminateSelectionActionMode();
7082            }
7083
7084            // No need to create the controller
7085            if (mSelectionModifierCursorController != null) {
7086                mSelectionModifierCursorController.resetTouchOffsets();
7087            }
7088        }
7089
7090        startStopMarquee(focused);
7091
7092        if (mTransformation != null) {
7093            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7094        }
7095
7096        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7097    }
7098
7099    private int getLastTapPosition() {
7100        // No need to create the controller at that point, no last tap position saved
7101        if (mSelectionModifierCursorController != null) {
7102            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7103            if (lastTapPosition >= 0) {
7104                // Safety check, should not be possible.
7105                if (lastTapPosition > mText.length()) {
7106                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7107                            + mText.length() + ")");
7108                    lastTapPosition = mText.length();
7109                }
7110                return lastTapPosition;
7111            }
7112        }
7113
7114        return -1;
7115    }
7116
7117    @Override
7118    public void onWindowFocusChanged(boolean hasWindowFocus) {
7119        super.onWindowFocusChanged(hasWindowFocus);
7120
7121        if (hasWindowFocus) {
7122            if (mBlink != null) {
7123                mBlink.uncancel();
7124
7125                if (isFocused()) {
7126                    mShowCursor = SystemClock.uptimeMillis();
7127                    makeBlink();
7128                }
7129            }
7130        } else {
7131            if (mBlink != null) {
7132                mBlink.cancel();
7133            }
7134            // Don't leave us in the middle of a batch edit.
7135            onEndBatchEdit();
7136            if (mInputContentType != null) {
7137                mInputContentType.enterDown = false;
7138            }
7139            hideControllers();
7140        }
7141
7142        startStopMarquee(hasWindowFocus);
7143    }
7144
7145    @Override
7146    protected void onVisibilityChanged(View changedView, int visibility) {
7147        super.onVisibilityChanged(changedView, visibility);
7148        if (visibility != VISIBLE) {
7149            hideControllers();
7150        }
7151    }
7152
7153    /**
7154     * Use {@link BaseInputConnection#removeComposingSpans
7155     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7156     * state from this text view.
7157     */
7158    public void clearComposingText() {
7159        if (mText instanceof Spannable) {
7160            BaseInputConnection.removeComposingSpans((Spannable)mText);
7161        }
7162    }
7163
7164    @Override
7165    public void setSelected(boolean selected) {
7166        boolean wasSelected = isSelected();
7167
7168        super.setSelected(selected);
7169
7170        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7171            if (selected) {
7172                startMarquee();
7173            } else {
7174                stopMarquee();
7175            }
7176        }
7177    }
7178
7179    class CommitSelectionReceiver extends ResultReceiver {
7180        private final int mPrevStart, mPrevEnd;
7181
7182        public CommitSelectionReceiver(int prevStart, int prevEnd) {
7183            super(getHandler());
7184            mPrevStart = prevStart;
7185            mPrevEnd = prevEnd;
7186        }
7187
7188        @Override
7189        protected void onReceiveResult(int resultCode, Bundle resultData) {
7190            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
7191            // by restoring its previous position.
7192            if (resultCode == InputMethodManager.RESULT_SHOWN) {
7193                final int len = mText.length();
7194                int start = Math.min(len, mPrevStart);
7195                int end = Math.min(len, mPrevEnd);
7196                Selection.setSelection((Spannable)mText, start, end);
7197
7198                boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7199                if (hasSelection() && !selectAllGotFocus) {
7200                    startSelectionActionMode();
7201                }
7202            }
7203        }
7204    }
7205
7206    @Override
7207    public boolean onTouchEvent(MotionEvent event) {
7208        final int action = event.getActionMasked();
7209
7210        if (hasInsertionController()) {
7211            getInsertionController().onTouchEvent(event);
7212        }
7213        if (hasSelectionController()) {
7214            getSelectionController().onTouchEvent(event);
7215        }
7216
7217        if (action == MotionEvent.ACTION_DOWN) {
7218            mLastDownPositionX = (int) event.getX();
7219            mLastDownPositionY = (int) event.getY();
7220
7221            // Reset this state; it will be re-set if super.onTouchEvent
7222            // causes focus to move to the view.
7223            mTouchFocusSelected = false;
7224            mIgnoreActionUpEvent = false;
7225        }
7226
7227        final boolean superResult = super.onTouchEvent(event);
7228
7229        /*
7230         * Don't handle the release after a long press, because it will
7231         * move the selection away from whatever the menu action was
7232         * trying to affect.
7233         */
7234        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7235            mDiscardNextActionUp = false;
7236            return superResult;
7237        }
7238
7239        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7240                && mText instanceof Spannable && mLayout != null) {
7241            boolean handled = false;
7242
7243            // Save previous selection, in case this event is used to show the IME.
7244            int oldSelStart = getSelectionStart();
7245            int oldSelEnd = getSelectionEnd();
7246
7247            final int oldScrollX = mScrollX;
7248            final int oldScrollY = mScrollY;
7249
7250            if (mMovement != null) {
7251                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7252            }
7253
7254            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable &&
7255                    action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent && isFocused()) {
7256                // The LinkMovementMethod which should handle taps on links has not been installed
7257                // to support text selection. We reproduce its behavior here to open links.
7258                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7259                        getSelectionEnd(), ClickableSpan.class);
7260
7261                if (links.length != 0) {
7262                    links[0].onClick(this);
7263                    handled = true;
7264                }
7265            }
7266
7267            if (isTextEditable() || mTextIsSelectable) {
7268                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
7269                    // Hide insertion anchor while scrolling. Leave selection.
7270                    hideInsertionPointCursorController();
7271                    // No need to create the controller, since there is nothing to update.
7272                    if (mSelectionModifierCursorController != null &&
7273                            mSelectionModifierCursorController.isShowing()) {
7274                        mSelectionModifierCursorController.updatePosition();
7275                    }
7276                }
7277                if (action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent && isFocused()) {
7278                    InputMethodManager imm = (InputMethodManager)
7279                    getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
7280
7281                    CommitSelectionReceiver csr = null;
7282                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
7283                            didTouchFocusSelect()) {
7284                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
7285                    }
7286
7287                    if (!mTextIsSelectable) {
7288                        // Show the IME, except when selecting in read-only text.
7289                        handled |= imm.showSoftInput(this, 0, csr) && (csr != null);
7290                    }
7291
7292                    stopSelectionActionMode();
7293                    boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7294                    if (hasInsertionController() && !selectAllGotFocus) {
7295                        getInsertionController().show();
7296                    }
7297                }
7298            }
7299
7300            if (handled) {
7301                return true;
7302            }
7303        }
7304
7305        return superResult;
7306    }
7307
7308    private void prepareCursorControllers() {
7309        boolean windowSupportsHandles = false;
7310
7311        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7312        if (params instanceof WindowManager.LayoutParams) {
7313            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7314            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7315                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7316        }
7317
7318        mInsertionControllerEnabled = windowSupportsHandles && isTextEditable() && mCursorVisible &&
7319                mLayout != null;
7320        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7321                mLayout != null;
7322
7323        if (!mInsertionControllerEnabled) {
7324            hideInsertionPointCursorController();
7325            mInsertionPointCursorController = null;
7326        }
7327
7328        if (!mSelectionControllerEnabled) {
7329            stopSelectionActionMode();
7330            mSelectionModifierCursorController = null;
7331        }
7332    }
7333
7334    /**
7335     * @return True iff this TextView contains a text that can be edited, or if this is
7336     * a selectable TextView.
7337     */
7338    private boolean isTextEditable() {
7339        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7340    }
7341
7342    /**
7343     * Returns true, only while processing a touch gesture, if the initial
7344     * touch down event caused focus to move to the text view and as a result
7345     * its selection changed.  Only valid while processing the touch gesture
7346     * of interest.
7347     */
7348    public boolean didTouchFocusSelect() {
7349        return mTouchFocusSelected;
7350    }
7351
7352    @Override
7353    public void cancelLongPress() {
7354        super.cancelLongPress();
7355        mIgnoreActionUpEvent = true;
7356    }
7357
7358    @Override
7359    public boolean onTrackballEvent(MotionEvent event) {
7360        if (mMovement != null && mText instanceof Spannable &&
7361            mLayout != null) {
7362            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7363                return true;
7364            }
7365        }
7366
7367        return super.onTrackballEvent(event);
7368    }
7369
7370    public void setScroller(Scroller s) {
7371        mScroller = s;
7372    }
7373
7374    private static class Blink extends Handler implements Runnable {
7375        private final WeakReference<TextView> mView;
7376        private boolean mCancelled;
7377
7378        public Blink(TextView v) {
7379            mView = new WeakReference<TextView>(v);
7380        }
7381
7382        public void run() {
7383            if (mCancelled) {
7384                return;
7385            }
7386
7387            removeCallbacks(Blink.this);
7388
7389            TextView tv = mView.get();
7390
7391            if (tv != null && tv.isFocused()) {
7392                int st = tv.getSelectionStart();
7393                int en = tv.getSelectionEnd();
7394
7395                if (st == en && st >= 0 && en >= 0) {
7396                    if (tv.mLayout != null) {
7397                        tv.invalidateCursorPath();
7398                    }
7399
7400                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7401                }
7402            }
7403        }
7404
7405        void cancel() {
7406            if (!mCancelled) {
7407                removeCallbacks(Blink.this);
7408                mCancelled = true;
7409            }
7410        }
7411
7412        void uncancel() {
7413            mCancelled = false;
7414        }
7415    }
7416
7417    @Override
7418    protected float getLeftFadingEdgeStrength() {
7419        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7420        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7421            if (mMarquee != null && !mMarquee.isStopped()) {
7422                final Marquee marquee = mMarquee;
7423                if (marquee.shouldDrawLeftFade()) {
7424                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7425                } else {
7426                    return 0.0f;
7427                }
7428            } else if (getLineCount() == 1) {
7429                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7430                    case Gravity.LEFT:
7431                        return 0.0f;
7432                    case Gravity.RIGHT:
7433                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7434                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7435                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7436                    case Gravity.CENTER_HORIZONTAL:
7437                        return 0.0f;
7438                }
7439            }
7440        }
7441        return super.getLeftFadingEdgeStrength();
7442    }
7443
7444    @Override
7445    protected float getRightFadingEdgeStrength() {
7446        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7447        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7448            if (mMarquee != null && !mMarquee.isStopped()) {
7449                final Marquee marquee = mMarquee;
7450                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7451            } else if (getLineCount() == 1) {
7452                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7453                    case Gravity.LEFT:
7454                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7455                                getCompoundPaddingRight();
7456                        final float lineWidth = mLayout.getLineWidth(0);
7457                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7458                    case Gravity.RIGHT:
7459                        return 0.0f;
7460                    case Gravity.CENTER_HORIZONTAL:
7461                    case Gravity.FILL_HORIZONTAL:
7462                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7463                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7464                                getHorizontalFadingEdgeLength();
7465                }
7466            }
7467        }
7468        return super.getRightFadingEdgeStrength();
7469    }
7470
7471    @Override
7472    protected int computeHorizontalScrollRange() {
7473        if (mLayout != null) {
7474            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7475                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7476        }
7477
7478        return super.computeHorizontalScrollRange();
7479    }
7480
7481    @Override
7482    protected int computeVerticalScrollRange() {
7483        if (mLayout != null)
7484            return mLayout.getHeight();
7485
7486        return super.computeVerticalScrollRange();
7487    }
7488
7489    @Override
7490    protected int computeVerticalScrollExtent() {
7491        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7492    }
7493
7494    public enum BufferType {
7495        NORMAL, SPANNABLE, EDITABLE,
7496    }
7497
7498    /**
7499     * Returns the TextView_textColor attribute from the
7500     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7501     * from the TextView_textAppearance attribute, if TextView_textColor
7502     * was not set directly.
7503     */
7504    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7505        ColorStateList colors;
7506        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7507                                         TextView_textColor);
7508
7509        if (colors == null) {
7510            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7511                                         TextView_textAppearance, -1);
7512            if (ap != -1) {
7513                TypedArray appearance;
7514                appearance = context.obtainStyledAttributes(ap,
7515                                            com.android.internal.R.styleable.TextAppearance);
7516                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7517                                                  TextAppearance_textColor);
7518                appearance.recycle();
7519            }
7520        }
7521
7522        return colors;
7523    }
7524
7525    /**
7526     * Returns the default color from the TextView_textColor attribute
7527     * from the AttributeSet, if set, or the default color from the
7528     * TextAppearance_textColor from the TextView_textAppearance attribute,
7529     * if TextView_textColor was not set directly.
7530     */
7531    public static int getTextColor(Context context,
7532                                   TypedArray attrs,
7533                                   int def) {
7534        ColorStateList colors = getTextColors(context, attrs);
7535
7536        if (colors == null) {
7537            return def;
7538        } else {
7539            return colors.getDefaultColor();
7540        }
7541    }
7542
7543    @Override
7544    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7545        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7546        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7547            switch (keyCode) {
7548            case KeyEvent.KEYCODE_A:
7549                if (canSelectText()) {
7550                    return onTextContextMenuItem(ID_SELECT_ALL);
7551                }
7552                break;
7553            case KeyEvent.KEYCODE_X:
7554                if (canCut()) {
7555                    return onTextContextMenuItem(ID_CUT);
7556                }
7557                break;
7558            case KeyEvent.KEYCODE_C:
7559                if (canCopy()) {
7560                    return onTextContextMenuItem(ID_COPY);
7561                }
7562                break;
7563            case KeyEvent.KEYCODE_V:
7564                if (canPaste()) {
7565                    return onTextContextMenuItem(ID_PASTE);
7566                }
7567                break;
7568            }
7569        }
7570        return super.onKeyShortcut(keyCode, event);
7571    }
7572
7573    /**
7574     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7575     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7576     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7577     */
7578    private boolean canSelectText() {
7579        return hasSelectionController() && mText.length() != 0;
7580    }
7581
7582    /**
7583     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7584     * The text must be spannable and the movement method must allow for arbitary selection.
7585     *
7586     * See also {@link #canSelectText()}.
7587     */
7588    private boolean textCanBeSelected() {
7589        // prepareCursorController() relies on this method.
7590        // If you change this condition, make sure prepareCursorController is called anywhere
7591        // the value of this condition might be changed.
7592        return mText instanceof Spannable && mMovement != null && mMovement.canSelectArbitrarily();
7593    }
7594
7595    private boolean canCut() {
7596        if (hasPasswordTransformationMethod()) {
7597            return false;
7598        }
7599
7600        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
7601            return true;
7602        }
7603
7604        return false;
7605    }
7606
7607    private boolean canCopy() {
7608        if (hasPasswordTransformationMethod()) {
7609            return false;
7610        }
7611
7612        if (mText.length() > 0 && hasSelection()) {
7613            return true;
7614        }
7615
7616        return false;
7617    }
7618
7619    private boolean canPaste() {
7620        return (mText instanceof Editable &&
7621                mInput != null &&
7622                getSelectionStart() >= 0 &&
7623                getSelectionEnd() >= 0 &&
7624                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7625                hasPrimaryClip());
7626    }
7627
7628    private boolean isWordCharacter(int position) {
7629        final char c = mTransformed.charAt(position);
7630        final int type = Character.getType(c);
7631        return (c == '\'' || c == '"' ||
7632                type == Character.UPPERCASE_LETTER ||
7633                type == Character.LOWERCASE_LETTER ||
7634                type == Character.TITLECASE_LETTER ||
7635                type == Character.MODIFIER_LETTER ||
7636                type == Character.DECIMAL_DIGIT_NUMBER);
7637    }
7638
7639    /**
7640     * Returns the offsets delimiting the 'word' located at position offset.
7641     *
7642     * @param offset An offset in the text.
7643     * @return The offsets for the start and end of the word located at <code>offset</code>.
7644     * The two ints offsets are packed in a long, with the starting offset shifted by 32 bits.
7645     * Returns a negative value if no valid word was found.
7646     */
7647    private long getWordLimitsAt(int offset) {
7648        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7649        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7650
7651        // Text selection is not permitted in password fields
7652        if (isPasswordInputType(mInputType) || isVisiblePasswordInputType(mInputType)) {
7653            return -1;
7654        }
7655
7656        final int len = mText.length();
7657
7658        // Specific text fields: always select the entire text
7659        if (klass == InputType.TYPE_CLASS_NUMBER ||
7660                klass == InputType.TYPE_CLASS_PHONE ||
7661                klass == InputType.TYPE_CLASS_DATETIME ||
7662                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7663                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7664                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7665                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7666            return len > 0 ? packRangeInLong(0, len) : -1;
7667        }
7668
7669        int end = Math.min(offset, len);
7670        if (end < 0) {
7671            return -1;
7672        }
7673
7674        final int MAX_LENGTH = 48;
7675        int start = end;
7676
7677        for (; start > 0; start--) {
7678            if (start == end) {
7679                // Cases where the text ends with a '.' and we select from the end of the line
7680                // (right after the dot), or when we select from the space character in "aaa, bbb".
7681                final char c = mTransformed.charAt(start - 1);
7682                final int type = Character.getType(c);
7683                if (type == Character.OTHER_PUNCTUATION) continue;
7684            }
7685            if (!isWordCharacter(start - 1)) break;
7686            if ((end - start) > MAX_LENGTH) return -1;
7687        }
7688
7689        for (; end < len; end++) {
7690            if (!isWordCharacter(end)) break;
7691            if ((end - start) > MAX_LENGTH) return -1;
7692        }
7693
7694        if (start == end) {
7695            return -1;
7696        }
7697
7698        boolean hasLetter = false;
7699        for (int i = start; i < end; i++) {
7700            if (Character.isLetter(mTransformed.charAt(i))) {
7701                hasLetter = true;
7702                break;
7703            }
7704        }
7705
7706        if (!hasLetter) {
7707            return -1;
7708        }
7709
7710        // Two ints packed in a long
7711        return packRangeInLong(start, end);
7712    }
7713
7714    private static long packRangeInLong(int start, int end) {
7715        return (((long) start) << 32) | end;
7716    }
7717
7718    private static int extractRangeStartFromLong(long range) {
7719        return (int) (range >>> 32);
7720    }
7721
7722    private static int extractRangeEndFromLong(long range) {
7723        return (int) (range & 0x00000000FFFFFFFFL);
7724    }
7725
7726    private void selectAll() {
7727        Selection.setSelection((Spannable) mText, 0, mText.length());
7728    }
7729
7730    private void selectCurrentWord() {
7731        if (!canSelectText()) {
7732            return;
7733        }
7734
7735        if (hasPasswordTransformationMethod()) {
7736            // selectCurrentWord is not available on a password field and would return an
7737            // arbitrary 10-charater selection around pressed position. Select all instead.
7738            // Cut/copy menu entries are not available for passwords, but being able to select all
7739            // is however useful to delete or paste to replace the entire content.
7740            selectAll();
7741            return;
7742        }
7743
7744        long lastTouchOffset = getLastTouchOffsets();
7745        final int minOffset = extractRangeStartFromLong(lastTouchOffset);
7746        final int maxOffset = extractRangeEndFromLong(lastTouchOffset);
7747
7748        int selectionStart, selectionEnd;
7749
7750        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7751        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7752        if (urlSpans.length == 1) {
7753            URLSpan url = urlSpans[0];
7754            selectionStart = ((Spanned) mText).getSpanStart(url);
7755            selectionEnd = ((Spanned) mText).getSpanEnd(url);
7756        } else {
7757            long wordLimits = getWordLimitsAt(minOffset);
7758            if (wordLimits >= 0) {
7759                selectionStart = extractRangeStartFromLong(wordLimits);
7760            } else {
7761                selectionStart = Math.max(minOffset - 5, 0);
7762            }
7763
7764            wordLimits = getWordLimitsAt(maxOffset);
7765            if (wordLimits >= 0) {
7766                selectionEnd = extractRangeEndFromLong(wordLimits);
7767            } else {
7768                selectionEnd = Math.min(maxOffset + 5, mText.length());
7769            }
7770        }
7771
7772        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7773    }
7774
7775    private long getLastTouchOffsets() {
7776        int minOffset, maxOffset;
7777
7778        if (mContextMenuTriggeredByKey) {
7779            minOffset = getSelectionStart();
7780            maxOffset = getSelectionEnd();
7781        } else {
7782            SelectionModifierCursorController selectionController = getSelectionController();
7783            minOffset = selectionController.getMinTouchOffset();
7784            maxOffset = selectionController.getMaxTouchOffset();
7785        }
7786
7787        return packRangeInLong(minOffset, maxOffset);
7788    }
7789
7790    @Override
7791    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7792        if (!isShown()) {
7793            return false;
7794        }
7795
7796        final boolean isPassword = hasPasswordTransformationMethod();
7797
7798        if (!isPassword) {
7799            CharSequence text = getText();
7800            if (TextUtils.isEmpty(text)) {
7801                text = getHint();
7802            }
7803            if (!TextUtils.isEmpty(text)) {
7804                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7805                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7806                }
7807                event.getText().add(text);
7808            }
7809        } else {
7810            event.setPassword(isPassword);
7811        }
7812        return false;
7813    }
7814
7815    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7816            int fromIndex, int removedCount, int addedCount) {
7817        AccessibilityEvent event =
7818            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7819        event.setFromIndex(fromIndex);
7820        event.setRemovedCount(removedCount);
7821        event.setAddedCount(addedCount);
7822        event.setBeforeText(beforeText);
7823        sendAccessibilityEventUnchecked(event);
7824    }
7825
7826    @Override
7827    protected void onCreateContextMenu(ContextMenu menu) {
7828        super.onCreateContextMenu(menu);
7829        boolean added = false;
7830        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7831        // Problem with context menu on long press: the menu appears while the key in down and when
7832        // the key is released, the view does not receive the key_up event.
7833        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
7834        // events. We cannot simply clear these flags in onTextContextMenuItem since
7835        // it may not be called (if the user/ discards the context menu with the back key).
7836        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
7837        // available in onTextContextMenuItem.
7838        mDPadCenterIsDown = mEnterKeyIsDown = false;
7839
7840        MenuHandler handler = new MenuHandler();
7841
7842        if (mText instanceof Spanned) {
7843            long lastTouchOffset = getLastTouchOffsets();
7844            final int selStart = extractRangeStartFromLong(lastTouchOffset);
7845            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
7846
7847            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
7848            if (urls.length > 0) {
7849                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7850                        setOnMenuItemClickListener(handler);
7851
7852                added = true;
7853            }
7854        }
7855
7856        // The context menu is not empty, which will prevent the selection mode from starting.
7857        // Add a entry to start it in the context menu.
7858        // TODO Does not handle the case where a subclass does not call super.thisMethod or
7859        // populates the menu AFTER this call.
7860        if (menu.size() > 0) {
7861            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
7862                    setOnMenuItemClickListener(handler);
7863            added = true;
7864        }
7865
7866        if (added) {
7867            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7868        }
7869    }
7870
7871    /**
7872     * Returns whether this text view is a current input method target.  The
7873     * default implementation just checks with {@link InputMethodManager}.
7874     */
7875    public boolean isInputMethodTarget() {
7876        InputMethodManager imm = InputMethodManager.peekInstance();
7877        return imm != null && imm.isActive(this);
7878    }
7879
7880    // Selection context mode
7881    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7882    private static final int ID_CUT = android.R.id.cut;
7883    private static final int ID_COPY = android.R.id.copy;
7884    private static final int ID_PASTE = android.R.id.paste;
7885    // Context menu entries
7886    private static final int ID_COPY_URL = android.R.id.copyUrl;
7887    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
7888
7889    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7890        public boolean onMenuItemClick(MenuItem item) {
7891            return onTextContextMenuItem(item.getItemId());
7892        }
7893    }
7894
7895    /**
7896     * Called when a context menu option for the text view is selected.  Currently
7897     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
7898     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
7899     * or {@link android.R.id#copy}.
7900     */
7901    public boolean onTextContextMenuItem(int id) {
7902        int min = 0;
7903        int max = mText.length();
7904
7905        if (isFocused()) {
7906            final int selStart = getSelectionStart();
7907            final int selEnd = getSelectionEnd();
7908
7909            min = Math.max(0, Math.min(selStart, selEnd));
7910            max = Math.max(0, Math.max(selStart, selEnd));
7911        }
7912
7913        ClipboardManager clipboard = (ClipboardManager)getContext()
7914                .getSystemService(Context.CLIPBOARD_SERVICE);
7915
7916        switch (id) {
7917            case ID_COPY_URL:
7918                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7919                if (urls.length >= 1) {
7920                    ClipData clip = null;
7921                    for (int i=0; i<urls.length; i++) {
7922                        Uri uri = Uri.parse(urls[0].getURL());
7923                        if (clip == null) {
7924                            clip = ClipData.newRawUri(null, null, uri);
7925                        } else {
7926                            clip.addItem(new ClipData.Item(uri));
7927                        }
7928                    }
7929                    if (clip != null) {
7930                        setPrimaryClip(clip);
7931                    }
7932                }
7933                stopSelectionActionMode();
7934                return true;
7935
7936            case ID_SELECTION_MODE:
7937                if (mSelectionActionMode != null) {
7938                    // Selection mode is already started, simply change selected part.
7939                    updateSelectedRegion();
7940                } else {
7941                    startSelectionActionMode();
7942                }
7943                return true;
7944
7945            case ID_SELECT_ALL:
7946                selectAll();
7947                // Update controller positions after selection change.
7948                if (hasSelectionController()) {
7949                    getSelectionController().show();
7950                }
7951                return true;
7952
7953            case ID_PASTE:
7954                paste(min, max);
7955                return true;
7956
7957            case ID_CUT:
7958                setPrimaryClip(ClipData.newPlainText(null, null,
7959                        mTransformed.subSequence(min, max)));
7960                ((Editable) mText).delete(min, max);
7961                stopSelectionActionMode();
7962                return true;
7963
7964            case ID_COPY:
7965                setPrimaryClip(ClipData.newPlainText(null, null,
7966                        mTransformed.subSequence(min, max)));
7967                stopSelectionActionMode();
7968                return true;
7969        }
7970        return false;
7971    }
7972
7973    /**
7974     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
7975     * by [min, max] when replacing this region by paste.
7976     * Note that if there was two spaces (or more) at that position before, they are kept. We just
7977     * make sure we do not add an extra one from the paste content.
7978     */
7979    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
7980        // Paste adds/removes spaces before or after insertion as needed.
7981        if (paste.length() > 0 && Character.isSpaceChar(paste.charAt(0))) {
7982            if (min > 0 && Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7983                // Two spaces at beginning of paste: remove one
7984                final int originalLength = mText.length();
7985                ((Editable) mText).delete(min - 1, min);
7986                // Due to filters, there is no guarantee that exactly one character was
7987                // removed. Count instead.
7988                final int delta = mText.length() - originalLength;
7989                min += delta;
7990                max += delta;
7991            }
7992        } else {
7993            if (min > 0 && !Character.isSpaceChar(mTransformed.charAt(min - 1))) {
7994                // No space at beginning of paste: add one
7995                final int originalLength = mText.length();
7996                ((Editable) mText).replace(min, min, " ");
7997                // Taking possible filters into account as above.
7998                final int delta = mText.length() - originalLength;
7999                min += delta;
8000                max += delta;
8001            }
8002        }
8003
8004        if (paste.length() > 0 && Character.isSpaceChar(paste.charAt(paste.length() - 1))) {
8005            if (max < mText.length() && Character.isSpaceChar(mTransformed.charAt(max))) {
8006                // Two spaces at end of paste: remove one
8007                ((Editable) mText).delete(max, max + 1);
8008            }
8009        } else {
8010            if (max < mText.length() && !Character.isSpaceChar(mTransformed.charAt(max))) {
8011                // No space at end of paste: add one
8012                ((Editable) mText).replace(max, max, " ");
8013            }
8014        }
8015
8016        return packRangeInLong(min, max);
8017    }
8018
8019    private DragThumbnailBuilder getTextThumbnailBuilder(CharSequence text) {
8020        TextView thumbnail = (TextView) inflate(mContext,
8021                com.android.internal.R.layout.text_drag_thumbnail, null);
8022
8023        if (thumbnail == null) {
8024            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8025        }
8026
8027        if (text.length() > DRAG_THUMBNAIL_MAX_TEXT_LENGTH) {
8028            text = text.subSequence(0, DRAG_THUMBNAIL_MAX_TEXT_LENGTH);
8029        }
8030        thumbnail.setText(text);
8031        thumbnail.setTextColor(getTextColors());
8032
8033        thumbnail.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8034        thumbnail.setGravity(Gravity.CENTER);
8035
8036        thumbnail.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8037                ViewGroup.LayoutParams.WRAP_CONTENT));
8038
8039        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8040        thumbnail.measure(size, size);
8041
8042        thumbnail.layout(0, 0, thumbnail.getMeasuredWidth(), thumbnail.getMeasuredHeight());
8043        thumbnail.invalidate();
8044        return new DragThumbnailBuilder(thumbnail);
8045    }
8046
8047    private static class DragLocalState {
8048        public TextView sourceTextView;
8049        public int start, end;
8050
8051        public DragLocalState(TextView sourceTextView, int start, int end) {
8052            this.sourceTextView = sourceTextView;
8053            this.start = start;
8054            this.end = end;
8055        }
8056    }
8057
8058    @Override
8059    public boolean performLongClick() {
8060        if (super.performLongClick()) {
8061            mDiscardNextActionUp = true;
8062            return true;
8063        }
8064
8065        // Long press in empty space moves cursor and shows the Paste affordance if available.
8066        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8067                mInsertionControllerEnabled) {
8068            final int offset = getOffset(mLastDownPositionX, mLastDownPositionY);
8069            stopSelectionActionMode();
8070            Selection.setSelection((Spannable)mText, offset);
8071            getInsertionController().show(0);
8072            mDiscardNextActionUp = true;
8073            return true;
8074        }
8075
8076        if (mSelectionActionMode != null) {
8077            if (touchPositionIsInSelection()) {
8078                // Start a drag
8079                final int start = getSelectionStart();
8080                final int end = getSelectionEnd();
8081                CharSequence selectedText = mTransformed.subSequence(start, end);
8082                ClipData data = ClipData.newPlainText(null, null, selectedText);
8083                DragLocalState localState = new DragLocalState(this, start, end);
8084                startDrag(data, getTextThumbnailBuilder(selectedText), false, localState);
8085                stopSelectionActionMode();
8086            } else {
8087                updateSelectedRegion();
8088            }
8089            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8090            mDiscardNextActionUp = true;
8091            return true;
8092        }
8093
8094        // Start a new selection
8095        if (startSelectionActionMode()) {
8096            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8097            mDiscardNextActionUp = true;
8098            return true;
8099        }
8100
8101        return false;
8102    }
8103
8104    /**
8105     * When selection mode is already started, this method simply updates the selected part of text
8106     * to the text under the finger.
8107     */
8108    private void updateSelectedRegion() {
8109        // Start a new selection at current position, keep selectionAction mode on
8110        selectCurrentWord();
8111        // Updates handles' positions
8112        getSelectionController().show();
8113    }
8114
8115    private boolean touchPositionIsInSelection() {
8116        int selectionStart = getSelectionStart();
8117        int selectionEnd = getSelectionEnd();
8118
8119        if (selectionStart == selectionEnd) {
8120            return false;
8121        }
8122
8123        if (selectionStart > selectionEnd) {
8124            int tmp = selectionStart;
8125            selectionStart = selectionEnd;
8126            selectionEnd = tmp;
8127            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8128        }
8129
8130        SelectionModifierCursorController selectionController = getSelectionController();
8131        int minOffset = selectionController.getMinTouchOffset();
8132        int maxOffset = selectionController.getMaxTouchOffset();
8133
8134        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8135    }
8136
8137    /**
8138     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8139     * selection is initiated in this View.
8140     *
8141     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8142     * Paste actions, depending on what this View supports.
8143     *
8144     * A custom implementation can add new entries in the default menu in its
8145     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
8146     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
8147     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
8148     * {@link android.R.id#paste} ids as parameters.
8149     *
8150     * Action click events should be handled by the custom implementation of
8151     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8152     *
8153     * Note that text selection mode is not started when a TextView receives focus and the
8154     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8155     * that case, to allow for quick replacement.
8156     */
8157    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8158        mCustomSelectionActionModeCallback = actionModeCallback;
8159    }
8160
8161    /**
8162     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8163     *
8164     * @return The current custom selection callback.
8165     */
8166    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8167        return mCustomSelectionActionModeCallback;
8168    }
8169
8170    /**
8171     *
8172     * @return true if the selection mode was actually started.
8173     */
8174    private boolean startSelectionActionMode() {
8175        if (mSelectionActionMode != null) {
8176            // Selection action mode is already started
8177            return false;
8178        }
8179
8180        if (!canSelectText() || !requestFocus()) {
8181            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8182            return false;
8183        }
8184
8185        if (!hasSelection()) {
8186            // If selection mode is started after a device rotation, there is already a selection.
8187            selectCurrentWord();
8188        }
8189
8190        final InputMethodManager imm = (InputMethodManager)
8191                getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
8192        imm.showSoftInput(this, 0, null);
8193
8194        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8195        mSelectionActionMode = startActionMode(actionModeCallback);
8196        return mSelectionActionMode != null;
8197    }
8198
8199    /**
8200     * Same as {@link #stopSelectionActionMode()}, except that there is no cursor controller
8201     * fade out animation. Needed since the drawable and their alpha values are shared by all
8202     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
8203     * new one otherwise.
8204     */
8205    private void terminateSelectionActionMode() {
8206        stopSelectionActionMode();
8207
8208        // No need to create the controller, nothing to cancel in that case.
8209        if (mSelectionModifierCursorController != null) {
8210            mSelectionModifierCursorController.cancelFadeOutAnimation();
8211        }
8212    }
8213
8214    private void stopSelectionActionMode() {
8215        if (mSelectionActionMode != null) {
8216            mSelectionActionMode.finish();
8217        }
8218    }
8219
8220    /**
8221     * Paste clipboard content between min and max positions.
8222     */
8223    private void paste(int min, int max) {
8224        ClipboardManager clipboard =
8225            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8226        ClipData clip = clipboard.getPrimaryClip();
8227        if (clip != null) {
8228            boolean didfirst = false;
8229            for (int i=0; i<clip.getItemCount(); i++) {
8230                CharSequence paste = clip.getItem(i).coerceToText(getContext());
8231                if (paste != null) {
8232                    if (!didfirst) {
8233                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8234                        min = extractRangeStartFromLong(minMax);
8235                        max = extractRangeEndFromLong(minMax);
8236                        Selection.setSelection((Spannable) mText, max);
8237                        ((Editable) mText).replace(min, max, paste);
8238                    } else {
8239                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8240                        ((Editable) mText).insert(getSelectionEnd(), paste);
8241                    }
8242                }
8243            }
8244            stopSelectionActionMode();
8245            sLastCutOrCopyTime = 0;
8246        }
8247    }
8248
8249    private void setPrimaryClip(ClipData clip) {
8250        ClipboardManager clipboard = (ClipboardManager) getContext().
8251                getSystemService(Context.CLIPBOARD_SERVICE);
8252        clipboard.setPrimaryClip(clip);
8253        sLastCutOrCopyTime = SystemClock.uptimeMillis();
8254    }
8255
8256    /**
8257     * An ActionMode Callback class that is used to provide actions while in text selection mode.
8258     *
8259     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
8260     * on which of these this TextView supports.
8261     */
8262    private class SelectionActionModeCallback implements ActionMode.Callback {
8263
8264        @Override
8265        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
8266            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
8267
8268            mode.setTitle(mContext.getString(com.android.internal.R.string.textSelectionCABTitle));
8269            mode.setSubtitle(null);
8270
8271            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
8272                    setAlphabeticShortcut('a').
8273                    setShowAsAction(
8274                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8275
8276            if (canCut()) {
8277                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
8278                    setIcon(styledAttributes.getResourceId(
8279                            R.styleable.Theme_actionModeCutDrawable, 0)).
8280                    setAlphabeticShortcut('x').
8281                    setShowAsAction(
8282                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8283            }
8284
8285            if (canCopy()) {
8286                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
8287                    setIcon(styledAttributes.getResourceId(
8288                            R.styleable.Theme_actionModeCopyDrawable, 0)).
8289                    setAlphabeticShortcut('c').
8290                    setShowAsAction(
8291                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8292            }
8293
8294            if (canPaste()) {
8295                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
8296                        setIcon(styledAttributes.getResourceId(
8297                                R.styleable.Theme_actionModePasteDrawable, 0)).
8298                        setAlphabeticShortcut('v').
8299                        setShowAsAction(
8300                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8301            }
8302
8303            styledAttributes.recycle();
8304
8305            if (mCustomSelectionActionModeCallback != null) {
8306                mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu);
8307            }
8308
8309            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
8310                getSelectionController().show();
8311                return true;
8312            } else {
8313                return false;
8314            }
8315        }
8316
8317        @Override
8318        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
8319            if (mCustomSelectionActionModeCallback != null) {
8320                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
8321            }
8322            return true;
8323        }
8324
8325        @Override
8326        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
8327            if (mCustomSelectionActionModeCallback != null &&
8328                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
8329                return true;
8330            }
8331            return onTextContextMenuItem(item.getItemId());
8332        }
8333
8334        @Override
8335        public void onDestroyActionMode(ActionMode mode) {
8336            if (mCustomSelectionActionModeCallback != null) {
8337                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
8338            }
8339            Selection.setSelection((Spannable) mText, getSelectionStart());
8340            hideSelectionModifierCursorController();
8341            mSelectionActionMode = null;
8342        }
8343    }
8344
8345    /**
8346     * A CursorController instance can be used to control a cursor in the text.
8347     * It is not used outside of {@link TextView}.
8348     * @hide
8349     */
8350    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
8351        /**
8352         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
8353         * See also {@link #hide()}.
8354         */
8355        public void show();
8356
8357        /**
8358         * Hide the cursor controller from screen.
8359         * See also {@link #show()}.
8360         */
8361        public void hide();
8362
8363        /**
8364         * @return true if the CursorController is currently visible
8365         */
8366        public boolean isShowing();
8367
8368        /**
8369         * Update the controller's position.
8370         */
8371        public void updatePosition(HandleView handle, int x, int y);
8372
8373        public void updatePosition();
8374
8375        /**
8376         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
8377         * a chance to become active and/or visible.
8378         * @param event The touch event
8379         */
8380        public boolean onTouchEvent(MotionEvent event);
8381
8382        /**
8383         * Called when the view is detached from window. Perform house keeping task, such as
8384         * stopping Runnable thread that would otherwise keep a reference on the context, thus
8385         * preventing the activity to be recycled.
8386         */
8387        public void onDetached();
8388    }
8389
8390    private class PastePopupMenu implements OnClickListener {
8391        private PopupWindow mContainer;
8392        private int mPositionX;
8393        private int mPositionY;
8394        private View mPasteView, mNoPasteView;
8395
8396        public PastePopupMenu() {
8397            mContainer = new PopupWindow(TextView.this.mContext, null,
8398                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8399            mContainer.setSplitTouchEnabled(true);
8400            mContainer.setClippingEnabled(false);
8401            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8402
8403            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8404            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8405        }
8406
8407        private void updateContent() {
8408            View view = canPaste() ? mPasteView : mNoPasteView;
8409
8410            if (view == null) {
8411                final int layout = canPaste() ? mTextEditPasteWindowLayout :
8412                    mTextEditNoPasteWindowLayout;
8413                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8414                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8415                if (inflater != null) {
8416                    view = inflater.inflate(layout, null);
8417                }
8418
8419                if (view == null) {
8420                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
8421                }
8422
8423                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8424                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8425                        ViewGroup.LayoutParams.WRAP_CONTENT));
8426                view.measure(size, size);
8427
8428                view.setOnClickListener(this);
8429
8430                if (canPaste()) mPasteView = view;
8431                else mNoPasteView = view;
8432            }
8433
8434            mContainer.setContentView(view);
8435        }
8436
8437        public void show() {
8438            updateContent();
8439            final int[] coords = mTempCoords;
8440            TextView.this.getLocationInWindow(coords);
8441            positionAtCursor();
8442            coords[0] += mPositionX;
8443            coords[1] += mPositionY;
8444            coords[0] = Math.max(0, coords[0]);
8445            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
8446            coords[0] = Math.min(screenWidth - mContainer.getContentView().getMeasuredWidth(),
8447                    coords[0]);
8448            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
8449        }
8450
8451        public void hide() {
8452            mContainer.dismiss();
8453        }
8454
8455        public boolean isShowing() {
8456            return mContainer.isShowing();
8457        }
8458
8459        @Override
8460        public void onClick(View v) {
8461            if (canPaste()) {
8462                paste(getSelectionStart(), getSelectionEnd());
8463            }
8464            hide();
8465        }
8466
8467        void positionAtCursor() {
8468            final int offset = TextView.this.getSelectionStart();
8469            View contentView = mContainer.getContentView();
8470            final int width = contentView.getMeasuredWidth();
8471            final int height = contentView.getMeasuredHeight();
8472            final int line = mLayout.getLineForOffset(offset);
8473            final int lineTop = mLayout.getLineTop(line);
8474
8475            final Rect bounds = sCursorControllerTempRect;
8476            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
8477            bounds.top = lineTop - height;
8478
8479            bounds.right = bounds.left + width;
8480            bounds.bottom = bounds.top + height;
8481
8482            convertFromViewportToContentCoordinates(bounds);
8483
8484            mPositionX = bounds.left;
8485            mPositionY = bounds.top;
8486        }
8487    }
8488
8489    private class HandleView extends View {
8490        private boolean mPositionOnTop = false;
8491        private Drawable mDrawable;
8492        private PopupWindow mContainer;
8493        private int mPositionX;
8494        private int mPositionY;
8495        private CursorController mController;
8496        private boolean mIsDragging;
8497        private float mTouchToWindowOffsetX;
8498        private float mTouchToWindowOffsetY;
8499        private float mHotspotX;
8500        private float mHotspotY;
8501        private int mHeight;
8502        private float mTouchOffsetY;
8503        private int mLastParentX;
8504        private int mLastParentY;
8505        private float mDownPositionX, mDownPositionY;
8506        private int mContainerPositionX, mContainerPositionY;
8507        private long mTouchTimer;
8508        private boolean mIsInsertionHandle = false;
8509        private PastePopupMenu mPastePopupWindow;
8510        private Runnable mLongPressCallback;
8511
8512        public static final int LEFT = 0;
8513        public static final int CENTER = 1;
8514        public static final int RIGHT = 2;
8515
8516        public HandleView(CursorController controller, int pos) {
8517            super(TextView.this.mContext);
8518            mController = controller;
8519            mContainer = new PopupWindow(TextView.this.mContext, null,
8520                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8521            mContainer.setSplitTouchEnabled(true);
8522            mContainer.setClippingEnabled(false);
8523            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8524
8525            setOrientation(pos);
8526        }
8527
8528        public void setOrientation(int pos) {
8529            int handleWidth;
8530            switch (pos) {
8531            case LEFT: {
8532                if (mSelectHandleLeft == null) {
8533                    mSelectHandleLeft = mContext.getResources().getDrawable(
8534                            mTextSelectHandleLeftRes);
8535                }
8536                mDrawable = mSelectHandleLeft;
8537                handleWidth = mDrawable.getIntrinsicWidth();
8538                mHotspotX = (handleWidth * 3) / 4;
8539                break;
8540            }
8541
8542            case RIGHT: {
8543                if (mSelectHandleRight == null) {
8544                    mSelectHandleRight = mContext.getResources().getDrawable(
8545                            mTextSelectHandleRightRes);
8546                }
8547                mDrawable = mSelectHandleRight;
8548                handleWidth = mDrawable.getIntrinsicWidth();
8549                mHotspotX = handleWidth / 4;
8550                break;
8551            }
8552
8553            case CENTER:
8554            default: {
8555                if (mSelectHandleCenter == null) {
8556                    mSelectHandleCenter = mContext.getResources().getDrawable(
8557                            mTextSelectHandleRes);
8558                }
8559                mDrawable = mSelectHandleCenter;
8560                handleWidth = mDrawable.getIntrinsicWidth();
8561                mHotspotX = handleWidth / 2;
8562                mIsInsertionHandle = true;
8563                break;
8564            }
8565            }
8566
8567            final int handleHeight = mDrawable.getIntrinsicHeight();
8568
8569            mTouchOffsetY = -handleHeight * 0.3f;
8570            mHotspotY = 0;
8571            mHeight = handleHeight;
8572            invalidate();
8573        }
8574
8575        @Override
8576        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
8577            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
8578                    mDrawable.getIntrinsicHeight());
8579        }
8580
8581        public void show() {
8582            if (!isPositionVisible()) {
8583                hide();
8584                return;
8585            }
8586            mContainer.setContentView(this);
8587            final int[] coords = mTempCoords;
8588            TextView.this.getLocationInWindow(coords);
8589            mContainerPositionX = coords[0] + mPositionX;
8590            mContainerPositionY = coords[1] + mPositionY;
8591            mContainer.showAtLocation(TextView.this, 0, mContainerPositionX, mContainerPositionY);
8592
8593            // Hide paste view when handle is moved on screen.
8594            if (mPastePopupWindow != null) {
8595                mPastePopupWindow.hide();
8596            }
8597        }
8598
8599        public void hide() {
8600            mIsDragging = false;
8601            mContainer.dismiss();
8602            if (mPastePopupWindow != null) {
8603                mPastePopupWindow.hide();
8604            }
8605        }
8606
8607        public boolean isShowing() {
8608            return mContainer.isShowing();
8609        }
8610
8611        private boolean isPositionVisible() {
8612            // Always show a dragging handle.
8613            if (mIsDragging) {
8614                return true;
8615            }
8616
8617            if (isInBatchEditMode()) {
8618                return false;
8619            }
8620
8621            final int extendedPaddingTop = getExtendedPaddingTop();
8622            final int extendedPaddingBottom = getExtendedPaddingBottom();
8623            final int compoundPaddingLeft = getCompoundPaddingLeft();
8624            final int compoundPaddingRight = getCompoundPaddingRight();
8625
8626            final TextView hostView = TextView.this;
8627            final int left = 0;
8628            final int right = hostView.getWidth();
8629            final int top = 0;
8630            final int bottom = hostView.getHeight();
8631
8632            if (mTempRect == null) {
8633                mTempRect = new Rect();
8634            }
8635            final Rect clip = mTempRect;
8636            clip.left = left + compoundPaddingLeft;
8637            clip.top = top + extendedPaddingTop;
8638            clip.right = right - compoundPaddingRight;
8639            clip.bottom = bottom - extendedPaddingBottom;
8640
8641            final ViewParent parent = hostView.getParent();
8642            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
8643                return false;
8644            }
8645
8646            final int[] coords = mTempCoords;
8647            hostView.getLocationInWindow(coords);
8648            final int posX = coords[0] + mPositionX + (int) mHotspotX;
8649            final int posY = coords[1] + mPositionY + (int) mHotspotY;
8650
8651            return posX >= clip.left && posX <= clip.right &&
8652                    posY >= clip.top && posY <= clip.bottom;
8653        }
8654
8655        private void moveTo(int x, int y) {
8656            mPositionX = x - TextView.this.mScrollX;
8657            mPositionY = y - TextView.this.mScrollY;
8658            if (isPositionVisible()) {
8659                int[] coords = null;
8660                if (mContainer.isShowing()) {
8661                    coords = mTempCoords;
8662                    TextView.this.getLocationInWindow(coords);
8663                    final int containerPositionX = coords[0] + mPositionX;
8664                    final int containerPositionY = coords[1] + mPositionY;
8665
8666                    if (containerPositionX != mContainerPositionX ||
8667                        containerPositionY != mContainerPositionY) {
8668                        mContainerPositionX = containerPositionX;
8669                        mContainerPositionY = containerPositionY;
8670
8671                        mContainer.update(mContainerPositionX, mContainerPositionY,
8672                                mRight - mLeft, mBottom - mTop);
8673
8674                        // Hide paste popup window as soon as a scroll occurs.
8675                        if (mPastePopupWindow != null) {
8676                            mPastePopupWindow.hide();
8677                        }
8678                    }
8679                } else {
8680                    show();
8681                }
8682
8683                if (mIsDragging) {
8684                    if (coords == null) {
8685                        coords = mTempCoords;
8686                        TextView.this.getLocationInWindow(coords);
8687                    }
8688                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
8689                        mTouchToWindowOffsetX += coords[0] - mLastParentX;
8690                        mTouchToWindowOffsetY += coords[1] - mLastParentY;
8691                        mLastParentX = coords[0];
8692                        mLastParentY = coords[1];
8693                    }
8694                    // Hide paste popup window as soon as the handle is dragged.
8695                    if (mPastePopupWindow != null) {
8696                        mPastePopupWindow.hide();
8697                    }
8698                }
8699            } else {
8700                hide();
8701            }
8702        }
8703
8704        @Override
8705        protected void onDraw(Canvas c) {
8706            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
8707            if (mPositionOnTop) {
8708                c.save();
8709                c.rotate(180, (mRight - mLeft) / 2, (mBottom - mTop) / 2);
8710                mDrawable.draw(c);
8711                c.restore();
8712            } else {
8713                mDrawable.draw(c);
8714            }
8715        }
8716
8717        @Override
8718        public boolean onTouchEvent(MotionEvent ev) {
8719            switch (ev.getActionMasked()) {
8720            case MotionEvent.ACTION_DOWN: {
8721                mDownPositionX = ev.getRawX();
8722                mDownPositionY = ev.getRawY();
8723                mTouchToWindowOffsetX = mDownPositionX - mPositionX;
8724                mTouchToWindowOffsetY = mDownPositionY - mPositionY;
8725                final int[] coords = mTempCoords;
8726                TextView.this.getLocationInWindow(coords);
8727                mLastParentX = coords[0];
8728                mLastParentY = coords[1];
8729                mIsDragging = true;
8730                if (mIsInsertionHandle) {
8731                    mTouchTimer = SystemClock.uptimeMillis();
8732                    if (mLongPressCallback == null) {
8733                        mLongPressCallback = new Runnable() {
8734                            public void run() {
8735                                mController.hide();
8736                                startSelectionActionMode();
8737                            }
8738                        };
8739                    }
8740                    postDelayed(mLongPressCallback, ViewConfiguration.getLongPressTimeout());
8741                }
8742                break;
8743            }
8744
8745            case MotionEvent.ACTION_MOVE: {
8746                final float rawX = ev.getRawX();
8747                final float rawY = ev.getRawY();
8748                final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
8749                final float newPosY = rawY - mTouchToWindowOffsetY + mHotspotY + mTouchOffsetY;
8750
8751                mController.updatePosition(this, Math.round(newPosX), Math.round(newPosY));
8752
8753                if (mIsInsertionHandle) {
8754                    final float dx = rawX - mDownPositionX;
8755                    final float dy = rawY - mDownPositionY;
8756                    final float distanceSquared = dx * dx + dy * dy;
8757                    if (distanceSquared >= mSquaredTouchSlopDistance) {
8758                        removeLongPressCallback();
8759                    }
8760                }
8761                break;
8762            }
8763
8764            case MotionEvent.ACTION_UP:
8765                if (mIsInsertionHandle) {
8766                    removeLongPressCallback();
8767                    long delay = SystemClock.uptimeMillis() - mTouchTimer;
8768                    if (delay < ViewConfiguration.getTapTimeout()) {
8769                        if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
8770                            // Tapping on the handle dismisses the displayed paste view,
8771                            mPastePopupWindow.hide();
8772                        } else {
8773                            ((InsertionPointCursorController) mController).show(0);
8774                        }
8775                    }
8776                }
8777                mIsDragging = false;
8778                break;
8779
8780            case MotionEvent.ACTION_CANCEL:
8781                if (mIsInsertionHandle) {
8782                    removeLongPressCallback();
8783                }
8784                mIsDragging = false;
8785            }
8786            return true;
8787        }
8788
8789        public boolean isDragging() {
8790            return mIsDragging;
8791        }
8792
8793        void positionAtCursor(final int offset, boolean bottom) {
8794            final int width = mDrawable.getIntrinsicWidth();
8795            final int height = mDrawable.getIntrinsicHeight();
8796            final int line = mLayout.getLineForOffset(offset);
8797            final int lineTop = mLayout.getLineTop(line);
8798            final int lineBottom = mLayout.getLineBottom(line);
8799
8800            final Rect bounds = sCursorControllerTempRect;
8801            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - mHotspotX)
8802                + TextView.this.mScrollX;
8803            bounds.top = (bottom ? lineBottom : lineTop - mHeight) + TextView.this.mScrollY;
8804
8805            bounds.right = bounds.left + width;
8806            bounds.bottom = bounds.top + height;
8807
8808            convertFromViewportToContentCoordinates(bounds);
8809            moveTo(bounds.left, bounds.top);
8810        }
8811
8812        void showPastePopupWindow() {
8813            if (mIsInsertionHandle) {
8814                if (mPastePopupWindow == null) {
8815                    // Lazy initialisation: create when actually shown only.
8816                    mPastePopupWindow = new PastePopupMenu();
8817                }
8818                mPastePopupWindow.show();
8819            }
8820        }
8821
8822        private void removeLongPressCallback() {
8823            if (mLongPressCallback != null) {
8824                removeCallbacks(mLongPressCallback);
8825            }
8826        }
8827
8828        void onDetached() {
8829            removeLongPressCallback();
8830        }
8831    }
8832
8833    private class InsertionPointCursorController implements CursorController {
8834        private static final int DELAY_BEFORE_FADE_OUT = 4100;
8835        private static final int DELAY_BEFORE_PASTE = 2000;
8836        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000;
8837
8838        // The cursor controller image. Lazily created.
8839        private HandleView mHandle;
8840        private Runnable mHider;
8841        private Runnable mPastePopupShower;
8842
8843        public void show() {
8844            show(DELAY_BEFORE_PASTE);
8845        }
8846
8847        public void show(int delayBeforePaste) {
8848            updatePosition();
8849            hideDelayed();
8850            getHandle().show();
8851            removePastePopupCallback();
8852            if (canPaste()) {
8853                final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
8854                if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
8855                    delayBeforePaste = 0;
8856                }
8857                if (mPastePopupShower == null) {
8858                    mPastePopupShower = new Runnable() {
8859                        public void run() {
8860                            getHandle().showPastePopupWindow();
8861                        }
8862                    };
8863                }
8864                postDelayed(mPastePopupShower, delayBeforePaste);
8865            }
8866        }
8867
8868        private void removePastePopupCallback() {
8869            if (mPastePopupShower != null) {
8870                removeCallbacks(mPastePopupShower);
8871            }
8872        }
8873
8874        private void removeHiderCallback() {
8875            if (mHider != null) {
8876                removeCallbacks(mHider);
8877            }
8878        }
8879
8880        public void hide() {
8881            if (mHandle != null) {
8882                mHandle.hide();
8883            }
8884            removeHiderCallback();
8885            removePastePopupCallback();
8886        }
8887
8888        private void hideDelayed() {
8889            removeHiderCallback();
8890            if (mHider == null) {
8891                mHider = new Runnable() {
8892                    public void run() {
8893                        hide();
8894                    }
8895                };
8896            }
8897            postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
8898        }
8899
8900        public boolean isShowing() {
8901            return mHandle != null && mHandle.isShowing();
8902        }
8903
8904        public void updatePosition(HandleView handle, int x, int y) {
8905            final int previousOffset = getSelectionStart();
8906            int offset = getHysteresisOffset(x, y, previousOffset);
8907
8908            if (offset != previousOffset) {
8909                Selection.setSelection((Spannable) mText, offset);
8910                updatePosition();
8911            }
8912            hideDelayed();
8913        }
8914
8915        public void updatePosition() {
8916            final int offset = getSelectionStart();
8917
8918            if (offset < 0) {
8919                // Should never happen, safety check.
8920                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
8921                hide();
8922                return;
8923            }
8924
8925            getHandle().positionAtCursor(offset, true);
8926        }
8927
8928        public boolean onTouchEvent(MotionEvent ev) {
8929            return false;
8930        }
8931
8932        public void onTouchModeChanged(boolean isInTouchMode) {
8933            if (!isInTouchMode) {
8934                hide();
8935            }
8936        }
8937
8938        private HandleView getHandle() {
8939            if (mHandle == null) {
8940                mHandle = new HandleView(this, HandleView.CENTER);
8941            }
8942            return mHandle;
8943        }
8944
8945        @Override
8946        public void onDetached() {
8947            removeHiderCallback();
8948            removePastePopupCallback();
8949            if (mHandle != null) {
8950                mHandle.onDetached();
8951            }
8952        }
8953    }
8954
8955    private class SelectionModifierCursorController implements CursorController {
8956        // The cursor controller images, lazily created when shown.
8957        private HandleView mStartHandle, mEndHandle;
8958        // The offsets of that last touch down event. Remembered to start selection there.
8959        private int mMinTouchOffset, mMaxTouchOffset;
8960        // Whether selection anchors are active
8961        private boolean mIsShowing;
8962
8963        // Double tap detection
8964        private long mPreviousTapUpTime = 0;
8965        private int mPreviousTapPositionX;
8966        private int mPreviousTapPositionY;
8967
8968        SelectionModifierCursorController() {
8969            resetTouchOffsets();
8970        }
8971
8972        public void show() {
8973            if (isInBatchEditMode()) {
8974                return;
8975            }
8976
8977            // Lazy object creation has to be done before updatePosition() is called.
8978            if (mStartHandle == null) mStartHandle = new HandleView(this, HandleView.LEFT);
8979            if (mEndHandle == null) mEndHandle = new HandleView(this, HandleView.RIGHT);
8980
8981            mIsShowing = true;
8982            updatePosition();
8983
8984            mStartHandle.show();
8985            mEndHandle.show();
8986
8987            hideInsertionPointCursorController();
8988        }
8989
8990        public void hide() {
8991            if (mStartHandle != null) mStartHandle.hide();
8992            if (mEndHandle != null) mEndHandle.hide();
8993            mIsShowing = false;
8994        }
8995
8996        public boolean isShowing() {
8997            return mIsShowing;
8998        }
8999
9000        public void cancelFadeOutAnimation() {
9001            hide();
9002        }
9003
9004        public void updatePosition(HandleView handle, int x, int y) {
9005            int selectionStart = getSelectionStart();
9006            int selectionEnd = getSelectionEnd();
9007
9008            final int previousOffset = handle == mStartHandle ? selectionStart : selectionEnd;
9009            int offset = getHysteresisOffset(x, y, previousOffset);
9010
9011            // Handle the case where start and end are swapped, making sure start <= end
9012            if (handle == mStartHandle) {
9013                if (selectionStart == offset || offset > selectionEnd) {
9014                    return; // no change, no need to redraw;
9015                }
9016                // If the user "closes" the selection entirely they were probably trying to
9017                // select a single character. Help them out.
9018                if (offset == selectionEnd) {
9019                    offset = selectionEnd - 1;
9020                }
9021                selectionStart = offset;
9022            } else {
9023                if (selectionEnd == offset || offset < selectionStart) {
9024                    return; // no change, no need to redraw;
9025                }
9026                // If the user "closes" the selection entirely they were probably trying to
9027                // select a single character. Help them out.
9028                if (offset == selectionStart) {
9029                    offset = selectionStart + 1;
9030                }
9031                selectionEnd = offset;
9032            }
9033
9034            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9035            updatePosition();
9036        }
9037
9038        public void updatePosition() {
9039            if (!isShowing()) {
9040                return;
9041            }
9042
9043            final int selectionStart = getSelectionStart();
9044            final int selectionEnd = getSelectionEnd();
9045
9046            if ((selectionStart < 0) || (selectionEnd < 0)) {
9047                // Should never happen, safety check.
9048                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
9049                hide();
9050                return;
9051            }
9052
9053            // The handles have been created since the controller isShowing().
9054            mStartHandle.positionAtCursor(selectionStart, true);
9055            mEndHandle.positionAtCursor(selectionEnd, true);
9056        }
9057
9058        public boolean onTouchEvent(MotionEvent event) {
9059            // This is done even when the View does not have focus, so that long presses can start
9060            // selection and tap can move cursor from this tap position.
9061            if (isTextEditable() || mTextIsSelectable) {
9062                switch (event.getActionMasked()) {
9063                    case MotionEvent.ACTION_DOWN:
9064                        final int x = (int) event.getX();
9065                        final int y = (int) event.getY();
9066
9067                        // Remember finger down position, to be able to start selection from there
9068                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
9069
9070                        // Double tap detection
9071                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
9072                        if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
9073                                isPositionOnText(x, y)) {
9074                            final int deltaX = x - mPreviousTapPositionX;
9075                            final int deltaY = y - mPreviousTapPositionY;
9076                            final int distanceSquared = deltaX * deltaX + deltaY * deltaY;
9077                            if (distanceSquared < mSquaredTouchSlopDistance) {
9078                                startSelectionActionMode();
9079                                mDiscardNextActionUp = true;
9080                            }
9081                        }
9082
9083                        mPreviousTapPositionX = x;
9084                        mPreviousTapPositionY = y;
9085
9086                        break;
9087
9088                    case MotionEvent.ACTION_POINTER_DOWN:
9089                    case MotionEvent.ACTION_POINTER_UP:
9090                        // Handle multi-point gestures. Keep min and max offset positions.
9091                        // Only activated for devices that correctly handle multi-touch.
9092                        if (mContext.getPackageManager().hasSystemFeature(
9093                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
9094                            updateMinAndMaxOffsets(event);
9095                        }
9096                        break;
9097
9098                    case MotionEvent.ACTION_UP:
9099                        mPreviousTapUpTime = SystemClock.uptimeMillis();
9100                        break;
9101                }
9102            }
9103            return false;
9104        }
9105
9106        /**
9107         * @param event
9108         */
9109        private void updateMinAndMaxOffsets(MotionEvent event) {
9110            int pointerCount = event.getPointerCount();
9111            for (int index = 0; index < pointerCount; index++) {
9112                final int x = (int) event.getX(index);
9113                final int y = (int) event.getY(index);
9114                int offset = getOffset(x, y);
9115                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
9116                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
9117            }
9118        }
9119
9120        public int getMinTouchOffset() {
9121            return mMinTouchOffset;
9122        }
9123
9124        public int getMaxTouchOffset() {
9125            return mMaxTouchOffset;
9126        }
9127
9128        public void resetTouchOffsets() {
9129            mMinTouchOffset = mMaxTouchOffset = -1;
9130        }
9131
9132        /**
9133         * @return true iff this controller is currently used to move the selection start.
9134         */
9135        public boolean isSelectionStartDragged() {
9136            return mStartHandle != null && mStartHandle.isDragging();
9137        }
9138
9139        public void onTouchModeChanged(boolean isInTouchMode) {
9140            if (!isInTouchMode) {
9141                hide();
9142            }
9143        }
9144
9145        @Override
9146        public void onDetached() {}
9147    }
9148
9149    private void hideInsertionPointCursorController() {
9150        // No need to create the controller to hide it.
9151        if (mInsertionPointCursorController != null) {
9152            mInsertionPointCursorController.hide();
9153        }
9154    }
9155
9156    private void hideSelectionModifierCursorController() {
9157        // No need to create the controller to hide it.
9158        if (mSelectionModifierCursorController != null) {
9159            mSelectionModifierCursorController.hide();
9160        }
9161    }
9162
9163    private void hideControllers() {
9164        hideInsertionPointCursorController();
9165        hideSelectionModifierCursorController();
9166    }
9167
9168    /**
9169     * Get the offset character closest to the specified absolute position.
9170     *
9171     * @param x The horizontal absolute position of a point on screen
9172     * @param y The vertical absolute position of a point on screen
9173     * @return the character offset for the character whose position is closest to the specified
9174     *  position. Returns -1 if there is no layout.
9175     *
9176     * @hide
9177     */
9178    public int getOffset(int x, int y) {
9179        if (getLayout() == null) return -1;
9180        final int line = getLineAtCoordinate(y);
9181        final int offset = getOffsetAtCoordinate(line, x);
9182        return offset;
9183    }
9184
9185    int getHysteresisOffset(int x, int y, int previousOffset) {
9186        final Layout layout = getLayout();
9187        if (layout == null) return -1;
9188
9189        int line = getLineAtCoordinate(y);
9190        final int previousLine = layout.getLineForOffset(previousOffset);
9191        final int previousLineTop = layout.getLineTop(previousLine);
9192        final int previousLineBottom = layout.getLineBottom(previousLine);
9193        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 8;
9194
9195        // If new line is just before or after previous line and y position is less than
9196        // hysteresisThreshold away from previous line, keep cursor on previous line.
9197        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
9198            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
9199            line = previousLine;
9200        }
9201
9202        return getOffsetAtCoordinate(line, x);
9203    }
9204
9205    private int convertToLocalHorizontalCoordinate(int x) {
9206        x -= getTotalPaddingLeft();
9207        // Clamp the position to inside of the view.
9208        x = Math.max(0, x);
9209        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9210        x += getScrollX();
9211        return x;
9212    }
9213
9214    private int getLineAtCoordinate(int y) {
9215        y -= getTotalPaddingTop();
9216        // Clamp the position to inside of the view.
9217        y = Math.max(0, y);
9218        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9219        y += getScrollY();
9220        return getLayout().getLineForVertical(y);
9221    }
9222
9223    private int getOffsetAtCoordinate(int line, int x) {
9224        x = convertToLocalHorizontalCoordinate(x);
9225        return getLayout().getOffsetForHorizontal(line, x);
9226    }
9227
9228    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
9229     * in the view. Returns false when the position is in the empty space of left/right of text.
9230     */
9231    private boolean isPositionOnText(int x, int y) {
9232        if (getLayout() == null) return false;
9233
9234        final int line = getLineAtCoordinate(y);
9235        x = convertToLocalHorizontalCoordinate(x);
9236
9237        if (x < getLayout().getLineLeft(line)) return false;
9238        if (x > getLayout().getLineRight(line)) return false;
9239        return true;
9240    }
9241
9242    @Override
9243    public boolean onDragEvent(DragEvent event) {
9244        switch (event.getAction()) {
9245            case DragEvent.ACTION_DRAG_STARTED:
9246                return hasInsertionController();
9247
9248            case DragEvent.ACTION_DRAG_ENTERED:
9249                TextView.this.requestFocus();
9250                return true;
9251
9252            case DragEvent.ACTION_DRAG_LOCATION:
9253                final int offset = getOffset((int) event.getX(), (int) event.getY());
9254                Selection.setSelection((Spannable)mText, offset);
9255                return true;
9256
9257            case DragEvent.ACTION_DROP:
9258                onDrop(event);
9259                return true;
9260
9261            case DragEvent.ACTION_DRAG_ENDED:
9262            case DragEvent.ACTION_DRAG_EXITED:
9263            default:
9264                return true;
9265        }
9266    }
9267
9268    private void onDrop(DragEvent event) {
9269        StringBuilder content = new StringBuilder("");
9270        ClipData clipData = event.getClipData();
9271        final int itemCount = clipData.getItemCount();
9272        for (int i=0; i < itemCount; i++) {
9273            Item item = clipData.getItem(i);
9274            content.append(item.coerceToText(TextView.this.mContext));
9275        }
9276
9277        final int offset = getOffset((int) event.getX(), (int) event.getY());
9278
9279        Object localState = event.getLocalState();
9280        DragLocalState dragLocalState = null;
9281        if (localState instanceof DragLocalState) {
9282            dragLocalState = (DragLocalState) localState;
9283        }
9284        boolean dragDropIntoItself = dragLocalState != null &&
9285                dragLocalState.sourceTextView == this;
9286
9287        if (dragDropIntoItself) {
9288            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
9289                // A drop inside the original selection discards the drop.
9290                return;
9291            }
9292        }
9293
9294        final int originalLength = mText.length();
9295        long minMax = prepareSpacesAroundPaste(offset, offset, content);
9296        int min = extractRangeStartFromLong(minMax);
9297        int max = extractRangeEndFromLong(minMax);
9298
9299        Selection.setSelection((Spannable) mText, max);
9300        ((Editable) mText).replace(min, max, content);
9301
9302        if (dragDropIntoItself) {
9303            int dragSourceStart = dragLocalState.start;
9304            int dragSourceEnd = dragLocalState.end;
9305            if (max <= dragSourceStart) {
9306                // Inserting text before selection has shifted positions
9307                final int shift = mText.length() - originalLength;
9308                dragSourceStart += shift;
9309                dragSourceEnd += shift;
9310            }
9311
9312            // Delete original selection
9313            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
9314
9315            // Make sure we do not leave two adjacent spaces.
9316            if ((dragSourceStart == 0 ||
9317                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
9318                    (dragSourceStart == mText.length() ||
9319                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
9320                final int pos = dragSourceStart == mText.length() ?
9321                        dragSourceStart - 1 : dragSourceStart;
9322                ((Editable) mText).delete(pos, pos + 1);
9323            }
9324        }
9325    }
9326
9327    /**
9328     * @return True if this view supports insertion handles.
9329     */
9330    boolean hasInsertionController() {
9331        return mInsertionControllerEnabled;
9332    }
9333
9334    /**
9335     * @return True if this view supports selection handles.
9336     */
9337    boolean hasSelectionController() {
9338        return mSelectionControllerEnabled;
9339    }
9340
9341    InsertionPointCursorController getInsertionController() {
9342        if (!mInsertionControllerEnabled) {
9343            return null;
9344        }
9345
9346        if (mInsertionPointCursorController == null) {
9347            mInsertionPointCursorController = new InsertionPointCursorController();
9348
9349            final ViewTreeObserver observer = getViewTreeObserver();
9350            if (observer != null) {
9351                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
9352            }
9353        }
9354
9355        return mInsertionPointCursorController;
9356    }
9357
9358    SelectionModifierCursorController getSelectionController() {
9359        if (!mSelectionControllerEnabled) {
9360            return null;
9361        }
9362
9363        if (mSelectionModifierCursorController == null) {
9364            mSelectionModifierCursorController = new SelectionModifierCursorController();
9365
9366            final ViewTreeObserver observer = getViewTreeObserver();
9367            if (observer != null) {
9368                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
9369            }
9370        }
9371
9372        return mSelectionModifierCursorController;
9373    }
9374
9375    boolean isInBatchEditMode() {
9376        final InputMethodState ims = mInputMethodState;
9377        if (ims != null) {
9378            return ims.mBatchEditNesting > 0;
9379        }
9380        return mInBatchEditControllers;
9381    }
9382
9383    @ViewDebug.ExportedProperty(category = "text")
9384    private CharSequence            mText;
9385    private CharSequence            mTransformed;
9386    private BufferType              mBufferType = BufferType.NORMAL;
9387
9388    private int                     mInputType = EditorInfo.TYPE_NULL;
9389    private CharSequence            mHint;
9390    private Layout                  mHintLayout;
9391
9392    private KeyListener             mInput;
9393
9394    private MovementMethod          mMovement;
9395    private TransformationMethod    mTransformation;
9396    private ChangeWatcher           mChangeWatcher;
9397
9398    private ArrayList<TextWatcher>  mListeners = null;
9399
9400    // display attributes
9401    private final TextPaint         mTextPaint;
9402    private boolean                 mUserSetTextScaleX;
9403    private final Paint             mHighlightPaint;
9404    private int                     mHighlightColor = 0xCC475925;
9405    /**
9406     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
9407     * this field being protected. Will be restored as private when lineHeight
9408     * feature request 3215097 is implemented
9409     * @hide
9410     */
9411    protected Layout                mLayout;
9412
9413    private long                    mShowCursor;
9414    private Blink                   mBlink;
9415    private boolean                 mCursorVisible = true;
9416
9417    // Cursor Controllers.
9418    private InsertionPointCursorController mInsertionPointCursorController;
9419    private SelectionModifierCursorController mSelectionModifierCursorController;
9420    private ActionMode              mSelectionActionMode;
9421    private boolean                 mInsertionControllerEnabled;
9422    private boolean                 mSelectionControllerEnabled;
9423    private boolean                 mInBatchEditControllers;
9424
9425    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
9426    // select from the current cursor position. Otherwise, select from long pressed position.
9427    private boolean                 mDPadCenterIsDown = false;
9428    private boolean                 mEnterKeyIsDown = false;
9429    private boolean                 mContextMenuTriggeredByKey = false;
9430    // Created once and shared by different CursorController helper methods.
9431    // Only one cursor controller is active at any time which prevent race conditions.
9432    private static Rect             sCursorControllerTempRect = new Rect();
9433
9434    private boolean                 mSelectAllOnFocus = false;
9435
9436    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
9437    private boolean                 mHorizontallyScrolling;
9438
9439    private int                     mAutoLinkMask;
9440    private boolean                 mLinksClickable = true;
9441
9442    private float                   mSpacingMult = 1;
9443    private float                   mSpacingAdd = 0;
9444    private boolean                 mTextIsSelectable = false;
9445
9446    private static final int        LINES = 1;
9447    private static final int        EMS = LINES;
9448    private static final int        PIXELS = 2;
9449
9450    private int                     mMaximum = Integer.MAX_VALUE;
9451    private int                     mMaxMode = LINES;
9452    private int                     mMinimum = 0;
9453    private int                     mMinMode = LINES;
9454
9455    private int                     mMaxWidth = Integer.MAX_VALUE;
9456    private int                     mMaxWidthMode = PIXELS;
9457    private int                     mMinWidth = 0;
9458    private int                     mMinWidthMode = PIXELS;
9459
9460    private boolean                 mSingleLine;
9461    private int                     mDesiredHeightAtMeasure = -1;
9462    private boolean                 mIncludePad = true;
9463
9464    // tmp primitives, so we don't alloc them on each draw
9465    private Path                    mHighlightPath;
9466    private boolean                 mHighlightPathBogus = true;
9467    private static final RectF      sTempRect = new RectF();
9468
9469    // XXX should be much larger
9470    private static final int        VERY_WIDE = 16384;
9471
9472    private static final int        BLINK = 500;
9473
9474    private static final int ANIMATED_SCROLL_GAP = 250;
9475    private long mLastScroll;
9476    private Scroller mScroller = null;
9477
9478    private BoringLayout.Metrics mBoring;
9479    private BoringLayout.Metrics mHintBoring;
9480
9481    private BoringLayout mSavedLayout, mSavedHintLayout;
9482
9483    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
9484    private InputFilter[] mFilters = NO_FILTERS;
9485    private static final Spanned EMPTY_SPANNED = new SpannedString("");
9486    private static int DRAG_THUMBNAIL_MAX_TEXT_LENGTH = 20;
9487    // System wide time for last cut or copy action.
9488    private static long sLastCutOrCopyTime;
9489    // Used to highlight a word when it is corrected by the IME
9490    private CorrectionHighlighter mCorrectionHighlighter;
9491}
9492