TextView.java revision e1fb6ebd132617508c625aadf646cc88994f4203 
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.SystemClock;
50import android.text.BoringLayout;
51import android.text.DynamicLayout;
52import android.text.Editable;
53import android.text.GetChars;
54import android.text.GraphicsOperations;
55import android.text.InputFilter;
56import android.text.InputType;
57import android.text.Layout;
58import android.text.ParcelableSpan;
59import android.text.Selection;
60import android.text.SpanWatcher;
61import android.text.Spannable;
62import android.text.SpannableString;
63import android.text.Spanned;
64import android.text.SpannedString;
65import android.text.StaticLayout;
66import android.text.TextPaint;
67import android.text.TextUtils;
68import android.text.TextWatcher;
69import android.text.method.ArrowKeyMovementMethod;
70import android.text.method.DateKeyListener;
71import android.text.method.DateTimeKeyListener;
72import android.text.method.DialerKeyListener;
73import android.text.method.DigitsKeyListener;
74import android.text.method.KeyListener;
75import android.text.method.LinkMovementMethod;
76import android.text.method.MetaKeyKeyListener;
77import android.text.method.MovementMethod;
78import android.text.method.PasswordTransformationMethod;
79import android.text.method.SingleLineTransformationMethod;
80import android.text.method.TextKeyListener;
81import android.text.method.TimeKeyListener;
82import android.text.method.TransformationMethod;
83import android.text.style.ClickableSpan;
84import android.text.style.ParagraphStyle;
85import android.text.style.URLSpan;
86import android.text.style.UpdateAppearance;
87import android.text.util.Linkify;
88import android.util.AttributeSet;
89import android.util.FloatMath;
90import android.util.Log;
91import android.util.TypedValue;
92import android.view.ActionMode;
93import android.view.ActionMode.Callback;
94import android.view.ContextMenu;
95import android.view.DragEvent;
96import android.view.Gravity;
97import android.view.HapticFeedbackConstants;
98import android.view.KeyCharacterMap;
99import android.view.KeyEvent;
100import android.view.LayoutInflater;
101import android.view.Menu;
102import android.view.MenuItem;
103import android.view.MotionEvent;
104import android.view.View;
105import android.view.ViewConfiguration;
106import android.view.ViewDebug;
107import android.view.ViewGroup;
108import android.view.ViewGroup.LayoutParams;
109import android.view.ViewParent;
110import android.view.ViewRoot;
111import android.view.ViewTreeObserver;
112import android.view.WindowManager;
113import android.view.accessibility.AccessibilityEvent;
114import android.view.accessibility.AccessibilityManager;
115import android.view.animation.AnimationUtils;
116import android.view.inputmethod.BaseInputConnection;
117import android.view.inputmethod.CompletionInfo;
118import android.view.inputmethod.CorrectionInfo;
119import android.view.inputmethod.EditorInfo;
120import android.view.inputmethod.ExtractedText;
121import android.view.inputmethod.ExtractedTextRequest;
122import android.view.inputmethod.InputConnection;
123import android.view.inputmethod.InputMethodManager;
124import android.widget.RemoteViews.RemoteView;
125
126import java.io.IOException;
127import java.lang.ref.WeakReference;
128import java.util.ArrayList;
129
130/**
131 * Displays text to the user and optionally allows them to edit it.  A TextView
132 * is a complete text editor, however the basic class is configured to not
133 * allow editing; see {@link EditText} for a subclass that configures the text
134 * view for editing.
135 *
136 * <p>
137 * <b>XML attributes</b>
138 * <p>
139 * See {@link android.R.styleable#TextView TextView Attributes},
140 * {@link android.R.styleable#View View Attributes}
141 *
142 * @attr ref android.R.styleable#TextView_text
143 * @attr ref android.R.styleable#TextView_bufferType
144 * @attr ref android.R.styleable#TextView_hint
145 * @attr ref android.R.styleable#TextView_textColor
146 * @attr ref android.R.styleable#TextView_textColorHighlight
147 * @attr ref android.R.styleable#TextView_textColorHint
148 * @attr ref android.R.styleable#TextView_textAppearance
149 * @attr ref android.R.styleable#TextView_textColorLink
150 * @attr ref android.R.styleable#TextView_textSize
151 * @attr ref android.R.styleable#TextView_textScaleX
152 * @attr ref android.R.styleable#TextView_typeface
153 * @attr ref android.R.styleable#TextView_textStyle
154 * @attr ref android.R.styleable#TextView_cursorVisible
155 * @attr ref android.R.styleable#TextView_maxLines
156 * @attr ref android.R.styleable#TextView_maxHeight
157 * @attr ref android.R.styleable#TextView_lines
158 * @attr ref android.R.styleable#TextView_height
159 * @attr ref android.R.styleable#TextView_minLines
160 * @attr ref android.R.styleable#TextView_minHeight
161 * @attr ref android.R.styleable#TextView_maxEms
162 * @attr ref android.R.styleable#TextView_maxWidth
163 * @attr ref android.R.styleable#TextView_ems
164 * @attr ref android.R.styleable#TextView_width
165 * @attr ref android.R.styleable#TextView_minEms
166 * @attr ref android.R.styleable#TextView_minWidth
167 * @attr ref android.R.styleable#TextView_gravity
168 * @attr ref android.R.styleable#TextView_scrollHorizontally
169 * @attr ref android.R.styleable#TextView_password
170 * @attr ref android.R.styleable#TextView_singleLine
171 * @attr ref android.R.styleable#TextView_selectAllOnFocus
172 * @attr ref android.R.styleable#TextView_includeFontPadding
173 * @attr ref android.R.styleable#TextView_maxLength
174 * @attr ref android.R.styleable#TextView_shadowColor
175 * @attr ref android.R.styleable#TextView_shadowDx
176 * @attr ref android.R.styleable#TextView_shadowDy
177 * @attr ref android.R.styleable#TextView_shadowRadius
178 * @attr ref android.R.styleable#TextView_autoLink
179 * @attr ref android.R.styleable#TextView_linksClickable
180 * @attr ref android.R.styleable#TextView_numeric
181 * @attr ref android.R.styleable#TextView_digits
182 * @attr ref android.R.styleable#TextView_phoneNumber
183 * @attr ref android.R.styleable#TextView_inputMethod
184 * @attr ref android.R.styleable#TextView_capitalize
185 * @attr ref android.R.styleable#TextView_autoText
186 * @attr ref android.R.styleable#TextView_editable
187 * @attr ref android.R.styleable#TextView_freezesText
188 * @attr ref android.R.styleable#TextView_ellipsize
189 * @attr ref android.R.styleable#TextView_drawableTop
190 * @attr ref android.R.styleable#TextView_drawableBottom
191 * @attr ref android.R.styleable#TextView_drawableRight
192 * @attr ref android.R.styleable#TextView_drawableLeft
193 * @attr ref android.R.styleable#TextView_drawablePadding
194 * @attr ref android.R.styleable#TextView_lineSpacingExtra
195 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
196 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
197 * @attr ref android.R.styleable#TextView_inputType
198 * @attr ref android.R.styleable#TextView_imeOptions
199 * @attr ref android.R.styleable#TextView_privateImeOptions
200 * @attr ref android.R.styleable#TextView_imeActionLabel
201 * @attr ref android.R.styleable#TextView_imeActionId
202 * @attr ref android.R.styleable#TextView_editorExtras
203 */
204@RemoteView
205public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
206    static final String LOG_TAG = "TextView";
207    static final boolean DEBUG_EXTRACT = false;
208
209    private static final int PRIORITY = 100;
210    private int mCurrentAlpha = 255;
211
212    final int[] mTempCoords = new int[2];
213    Rect mTempRect;
214
215    private ColorStateList mTextColor;
216    private int mCurTextColor;
217    private ColorStateList mHintTextColor;
218    private ColorStateList mLinkTextColor;
219    private int mCurHintTextColor;
220    private boolean mFreezesText;
221    private boolean mFrozenWithFocus;
222    private boolean mTemporaryDetach;
223    private boolean mDispatchTemporaryDetach;
224
225    private boolean mDiscardNextActionUp = false;
226    private boolean mIgnoreActionUpEvent = false;
227
228    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
229    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
230
231    private float mShadowRadius, mShadowDx, mShadowDy;
232
233    private static final int PREDRAW_NOT_REGISTERED = 0;
234    private static final int PREDRAW_PENDING = 1;
235    private static final int PREDRAW_DONE = 2;
236    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
237
238    private TextUtils.TruncateAt mEllipsize = null;
239
240    // Enum for the "typeface" XML parameter.
241    // TODO: How can we get this from the XML instead of hardcoding it here?
242    private static final int SANS = 1;
243    private static final int SERIF = 2;
244    private static final int MONOSPACE = 3;
245
246    // Bitfield for the "numeric" XML parameter.
247    // TODO: How can we get this from the XML instead of hardcoding it here?
248    private static final int SIGNED = 2;
249    private static final int DECIMAL = 4;
250
251    class Drawables {
252        final Rect mCompoundRect = new Rect();
253        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
254        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
255        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
256        int mDrawablePadding;
257    }
258    private Drawables mDrawables;
259
260    private CharSequence mError;
261    private boolean mErrorWasChanged;
262    private ErrorPopup mPopup;
263    /**
264     * This flag is set if the TextView tries to display an error before it
265     * is attached to the window (so its position is still unknown).
266     * It causes the error to be shown later, when onAttachedToWindow()
267     * is called.
268     */
269    private boolean mShowErrorAfterAttach;
270
271    private CharWrapper mCharWrapper = null;
272
273    private boolean mSelectionMoved = false;
274    private boolean mTouchFocusSelected = false;
275
276    private Marquee mMarquee;
277    private boolean mRestartMarquee;
278
279    private int mMarqueeRepeatLimit = 3;
280
281    class InputContentType {
282        int imeOptions = EditorInfo.IME_NULL;
283        String privateImeOptions;
284        CharSequence imeActionLabel;
285        int imeActionId;
286        Bundle extras;
287        OnEditorActionListener onEditorActionListener;
288        boolean enterDown;
289    }
290    InputContentType mInputContentType;
291
292    class InputMethodState {
293        Rect mCursorRectInWindow = new Rect();
294        RectF mTmpRectF = new RectF();
295        float[] mTmpOffset = new float[2];
296        ExtractedTextRequest mExtracting;
297        final ExtractedText mTmpExtracted = new ExtractedText();
298        int mBatchEditNesting;
299        boolean mCursorChanged;
300        boolean mSelectionModeChanged;
301        boolean mContentChanged;
302        int mChangedStart, mChangedEnd, mChangedDelta;
303    }
304    InputMethodState mInputMethodState;
305
306    private int mTextSelectHandleLeftRes;
307    private int mTextSelectHandleRightRes;
308    private int mTextSelectHandleRes;
309    private int mTextEditPasteWindowLayout, mTextEditSidePasteWindowLayout;
310    private int mTextEditNoPasteWindowLayout, mTextEditSideNoPasteWindowLayout;
311
312    private int mCursorDrawableRes;
313    private final Drawable[] mCursorDrawable = new Drawable[2];
314    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
315
316    private Drawable mSelectHandleLeft;
317    private Drawable mSelectHandleRight;
318    private Drawable mSelectHandleCenter;
319
320    private int mLastDownPositionX, mLastDownPositionY;
321    private Callback mCustomSelectionActionModeCallback;
322
323    private final int mSquaredTouchSlopDistance;
324    // Set when this TextView gained focus with some text selected. Will start selection mode.
325    private boolean mCreatedWithASelection = false;
326
327    /*
328     * Kick-start the font cache for the zygote process (to pay the cost of
329     * initializing freetype for our default font only once).
330     */
331    static {
332        Paint p = new Paint();
333        p.setAntiAlias(true);
334        // We don't care about the result, just the side-effect of measuring.
335        p.measureText("H");
336    }
337
338    /**
339     * Interface definition for a callback to be invoked when an action is
340     * performed on the editor.
341     */
342    public interface OnEditorActionListener {
343        /**
344         * Called when an action is being performed.
345         *
346         * @param v The view that was clicked.
347         * @param actionId Identifier of the action.  This will be either the
348         * identifier you supplied, or {@link EditorInfo#IME_NULL
349         * EditorInfo.IME_NULL} if being called due to the enter key
350         * being pressed.
351         * @param event If triggered by an enter key, this is the event;
352         * otherwise, this is null.
353         * @return Return true if you have consumed the action, else false.
354         */
355        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
356    }
357
358    public TextView(Context context) {
359        this(context, null);
360    }
361
362    public TextView(Context context,
363                    AttributeSet attrs) {
364        this(context, attrs, com.android.internal.R.attr.textViewStyle);
365    }
366
367    @SuppressWarnings("deprecation")
368    public TextView(Context context,
369                    AttributeSet attrs,
370                    int defStyle) {
371        super(context, attrs, defStyle);
372        mText = "";
373
374        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
375        mTextPaint.density = getResources().getDisplayMetrics().density;
376        mTextPaint.setCompatibilityScaling(
377                getResources().getCompatibilityInfo().applicationScale);
378
379        // If we get the paint from the skin, we should set it to left, since
380        // the layout always wants it to be left.
381        // mTextPaint.setTextAlign(Paint.Align.LEFT);
382
383        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
384        mHighlightPaint.setCompatibilityScaling(
385                getResources().getCompatibilityInfo().applicationScale);
386
387        mMovement = getDefaultMovementMethod();
388        mTransformation = null;
389
390        TypedArray a =
391            context.obtainStyledAttributes(
392                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
393
394        int textColorHighlight = 0;
395        ColorStateList textColor = null;
396        ColorStateList textColorHint = null;
397        ColorStateList textColorLink = null;
398        int textSize = 15;
399        int typefaceIndex = -1;
400        int styleIndex = -1;
401
402        /*
403         * Look the appearance up without checking first if it exists because
404         * almost every TextView has one and it greatly simplifies the logic
405         * to be able to parse the appearance first and then let specific tags
406         * for this View override it.
407         */
408        TypedArray appearance = null;
409        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
410        if (ap != -1) {
411            appearance = context.obtainStyledAttributes(ap,
412                                com.android.internal.R.styleable.
413                                TextAppearance);
414        }
415        if (appearance != null) {
416            int n = appearance.getIndexCount();
417            for (int i = 0; i < n; i++) {
418                int attr = appearance.getIndex(i);
419
420                switch (attr) {
421                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
422                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
423                    break;
424
425                case com.android.internal.R.styleable.TextAppearance_textColor:
426                    textColor = appearance.getColorStateList(attr);
427                    break;
428
429                case com.android.internal.R.styleable.TextAppearance_textColorHint:
430                    textColorHint = appearance.getColorStateList(attr);
431                    break;
432
433                case com.android.internal.R.styleable.TextAppearance_textColorLink:
434                    textColorLink = appearance.getColorStateList(attr);
435                    break;
436
437                case com.android.internal.R.styleable.TextAppearance_textSize:
438                    textSize = appearance.getDimensionPixelSize(attr, textSize);
439                    break;
440
441                case com.android.internal.R.styleable.TextAppearance_typeface:
442                    typefaceIndex = appearance.getInt(attr, -1);
443                    break;
444
445                case com.android.internal.R.styleable.TextAppearance_textStyle:
446                    styleIndex = appearance.getInt(attr, -1);
447                    break;
448                }
449            }
450
451            appearance.recycle();
452        }
453
454        boolean editable = getDefaultEditable();
455        CharSequence inputMethod = null;
456        int numeric = 0;
457        CharSequence digits = null;
458        boolean phone = false;
459        boolean autotext = false;
460        int autocap = -1;
461        int buffertype = 0;
462        boolean selectallonfocus = false;
463        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
464            drawableBottom = null;
465        int drawablePadding = 0;
466        int ellipsize = -1;
467        boolean singleLine = false;
468        int maxlength = -1;
469        CharSequence text = "";
470        CharSequence hint = null;
471        int shadowcolor = 0;
472        float dx = 0, dy = 0, r = 0;
473        boolean password = false;
474        int inputType = EditorInfo.TYPE_NULL;
475
476        int n = a.getIndexCount();
477        for (int i = 0; i < n; i++) {
478            int attr = a.getIndex(i);
479
480            switch (attr) {
481            case com.android.internal.R.styleable.TextView_editable:
482                editable = a.getBoolean(attr, editable);
483                break;
484
485            case com.android.internal.R.styleable.TextView_inputMethod:
486                inputMethod = a.getText(attr);
487                break;
488
489            case com.android.internal.R.styleable.TextView_numeric:
490                numeric = a.getInt(attr, numeric);
491                break;
492
493            case com.android.internal.R.styleable.TextView_digits:
494                digits = a.getText(attr);
495                break;
496
497            case com.android.internal.R.styleable.TextView_phoneNumber:
498                phone = a.getBoolean(attr, phone);
499                break;
500
501            case com.android.internal.R.styleable.TextView_autoText:
502                autotext = a.getBoolean(attr, autotext);
503                break;
504
505            case com.android.internal.R.styleable.TextView_capitalize:
506                autocap = a.getInt(attr, autocap);
507                break;
508
509            case com.android.internal.R.styleable.TextView_bufferType:
510                buffertype = a.getInt(attr, buffertype);
511                break;
512
513            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
514                selectallonfocus = a.getBoolean(attr, selectallonfocus);
515                break;
516
517            case com.android.internal.R.styleable.TextView_autoLink:
518                mAutoLinkMask = a.getInt(attr, 0);
519                break;
520
521            case com.android.internal.R.styleable.TextView_linksClickable:
522                mLinksClickable = a.getBoolean(attr, true);
523                break;
524
525            case com.android.internal.R.styleable.TextView_drawableLeft:
526                drawableLeft = a.getDrawable(attr);
527                break;
528
529            case com.android.internal.R.styleable.TextView_drawableTop:
530                drawableTop = a.getDrawable(attr);
531                break;
532
533            case com.android.internal.R.styleable.TextView_drawableRight:
534                drawableRight = a.getDrawable(attr);
535                break;
536
537            case com.android.internal.R.styleable.TextView_drawableBottom:
538                drawableBottom = a.getDrawable(attr);
539                break;
540
541            case com.android.internal.R.styleable.TextView_drawablePadding:
542                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
543                break;
544
545            case com.android.internal.R.styleable.TextView_maxLines:
546                setMaxLines(a.getInt(attr, -1));
547                break;
548
549            case com.android.internal.R.styleable.TextView_maxHeight:
550                setMaxHeight(a.getDimensionPixelSize(attr, -1));
551                break;
552
553            case com.android.internal.R.styleable.TextView_lines:
554                setLines(a.getInt(attr, -1));
555                break;
556
557            case com.android.internal.R.styleable.TextView_height:
558                setHeight(a.getDimensionPixelSize(attr, -1));
559                break;
560
561            case com.android.internal.R.styleable.TextView_minLines:
562                setMinLines(a.getInt(attr, -1));
563                break;
564
565            case com.android.internal.R.styleable.TextView_minHeight:
566                setMinHeight(a.getDimensionPixelSize(attr, -1));
567                break;
568
569            case com.android.internal.R.styleable.TextView_maxEms:
570                setMaxEms(a.getInt(attr, -1));
571                break;
572
573            case com.android.internal.R.styleable.TextView_maxWidth:
574                setMaxWidth(a.getDimensionPixelSize(attr, -1));
575                break;
576
577            case com.android.internal.R.styleable.TextView_ems:
578                setEms(a.getInt(attr, -1));
579                break;
580
581            case com.android.internal.R.styleable.TextView_width:
582                setWidth(a.getDimensionPixelSize(attr, -1));
583                break;
584
585            case com.android.internal.R.styleable.TextView_minEms:
586                setMinEms(a.getInt(attr, -1));
587                break;
588
589            case com.android.internal.R.styleable.TextView_minWidth:
590                setMinWidth(a.getDimensionPixelSize(attr, -1));
591                break;
592
593            case com.android.internal.R.styleable.TextView_gravity:
594                setGravity(a.getInt(attr, -1));
595                break;
596
597            case com.android.internal.R.styleable.TextView_hint:
598                hint = a.getText(attr);
599                break;
600
601            case com.android.internal.R.styleable.TextView_text:
602                text = a.getText(attr);
603                break;
604
605            case com.android.internal.R.styleable.TextView_scrollHorizontally:
606                if (a.getBoolean(attr, false)) {
607                    setHorizontallyScrolling(true);
608                }
609                break;
610
611            case com.android.internal.R.styleable.TextView_singleLine:
612                singleLine = a.getBoolean(attr, singleLine);
613                break;
614
615            case com.android.internal.R.styleable.TextView_ellipsize:
616                ellipsize = a.getInt(attr, ellipsize);
617                break;
618
619            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
620                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
621                break;
622
623            case com.android.internal.R.styleable.TextView_includeFontPadding:
624                if (!a.getBoolean(attr, true)) {
625                    setIncludeFontPadding(false);
626                }
627                break;
628
629            case com.android.internal.R.styleable.TextView_cursorVisible:
630                if (!a.getBoolean(attr, true)) {
631                    setCursorVisible(false);
632                }
633                break;
634
635            case com.android.internal.R.styleable.TextView_maxLength:
636                maxlength = a.getInt(attr, -1);
637                break;
638
639            case com.android.internal.R.styleable.TextView_textScaleX:
640                setTextScaleX(a.getFloat(attr, 1.0f));
641                break;
642
643            case com.android.internal.R.styleable.TextView_freezesText:
644                mFreezesText = a.getBoolean(attr, false);
645                break;
646
647            case com.android.internal.R.styleable.TextView_shadowColor:
648                shadowcolor = a.getInt(attr, 0);
649                break;
650
651            case com.android.internal.R.styleable.TextView_shadowDx:
652                dx = a.getFloat(attr, 0);
653                break;
654
655            case com.android.internal.R.styleable.TextView_shadowDy:
656                dy = a.getFloat(attr, 0);
657                break;
658
659            case com.android.internal.R.styleable.TextView_shadowRadius:
660                r = a.getFloat(attr, 0);
661                break;
662
663            case com.android.internal.R.styleable.TextView_enabled:
664                setEnabled(a.getBoolean(attr, isEnabled()));
665                break;
666
667            case com.android.internal.R.styleable.TextView_textColorHighlight:
668                textColorHighlight = a.getColor(attr, textColorHighlight);
669                break;
670
671            case com.android.internal.R.styleable.TextView_textColor:
672                textColor = a.getColorStateList(attr);
673                break;
674
675            case com.android.internal.R.styleable.TextView_textColorHint:
676                textColorHint = a.getColorStateList(attr);
677                break;
678
679            case com.android.internal.R.styleable.TextView_textColorLink:
680                textColorLink = a.getColorStateList(attr);
681                break;
682
683            case com.android.internal.R.styleable.TextView_textSize:
684                textSize = a.getDimensionPixelSize(attr, textSize);
685                break;
686
687            case com.android.internal.R.styleable.TextView_typeface:
688                typefaceIndex = a.getInt(attr, typefaceIndex);
689                break;
690
691            case com.android.internal.R.styleable.TextView_textStyle:
692                styleIndex = a.getInt(attr, styleIndex);
693                break;
694
695            case com.android.internal.R.styleable.TextView_password:
696                password = a.getBoolean(attr, password);
697                break;
698
699            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
700                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
701                break;
702
703            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
704                mSpacingMult = a.getFloat(attr, mSpacingMult);
705                break;
706
707            case com.android.internal.R.styleable.TextView_inputType:
708                inputType = a.getInt(attr, mInputType);
709                break;
710
711            case com.android.internal.R.styleable.TextView_imeOptions:
712                if (mInputContentType == null) {
713                    mInputContentType = new InputContentType();
714                }
715                mInputContentType.imeOptions = a.getInt(attr,
716                        mInputContentType.imeOptions);
717                break;
718
719            case com.android.internal.R.styleable.TextView_imeActionLabel:
720                if (mInputContentType == null) {
721                    mInputContentType = new InputContentType();
722                }
723                mInputContentType.imeActionLabel = a.getText(attr);
724                break;
725
726            case com.android.internal.R.styleable.TextView_imeActionId:
727                if (mInputContentType == null) {
728                    mInputContentType = new InputContentType();
729                }
730                mInputContentType.imeActionId = a.getInt(attr,
731                        mInputContentType.imeActionId);
732                break;
733
734            case com.android.internal.R.styleable.TextView_privateImeOptions:
735                setPrivateImeOptions(a.getString(attr));
736                break;
737
738            case com.android.internal.R.styleable.TextView_editorExtras:
739                try {
740                    setInputExtras(a.getResourceId(attr, 0));
741                } catch (XmlPullParserException e) {
742                    Log.w(LOG_TAG, "Failure reading input extras", e);
743                } catch (IOException e) {
744                    Log.w(LOG_TAG, "Failure reading input extras", e);
745                }
746                break;
747
748            case com.android.internal.R.styleable.TextView_textCursorDrawable:
749                mCursorDrawableRes = a.getResourceId(attr, 0);
750                break;
751
752            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
753                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
754                break;
755
756            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
757                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
758                break;
759
760            case com.android.internal.R.styleable.TextView_textSelectHandle:
761                mTextSelectHandleRes = a.getResourceId(attr, 0);
762                break;
763
764            case com.android.internal.R.styleable.TextView_textEditPasteWindowLayout:
765                mTextEditPasteWindowLayout = a.getResourceId(attr, 0);
766                break;
767
768            case com.android.internal.R.styleable.TextView_textEditNoPasteWindowLayout:
769                mTextEditNoPasteWindowLayout = a.getResourceId(attr, 0);
770                break;
771
772            case com.android.internal.R.styleable.TextView_textEditSidePasteWindowLayout:
773                mTextEditSidePasteWindowLayout = a.getResourceId(attr, 0);
774                break;
775
776            case com.android.internal.R.styleable.TextView_textEditSideNoPasteWindowLayout:
777                mTextEditSideNoPasteWindowLayout = a.getResourceId(attr, 0);
778                break;
779
780            case com.android.internal.R.styleable.TextView_textIsSelectable:
781                mTextIsSelectable = a.getBoolean(attr, false);
782                break;
783            }
784        }
785        a.recycle();
786
787        BufferType bufferType = BufferType.EDITABLE;
788
789        final int variation =
790                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
791        final boolean passwordInputType = variation
792                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
793        final boolean webPasswordInputType = variation
794                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
795        final boolean numberPasswordInputType = variation
796                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
797
798        if (inputMethod != null) {
799            Class<?> c;
800
801            try {
802                c = Class.forName(inputMethod.toString());
803            } catch (ClassNotFoundException ex) {
804                throw new RuntimeException(ex);
805            }
806
807            try {
808                mInput = (KeyListener) c.newInstance();
809            } catch (InstantiationException ex) {
810                throw new RuntimeException(ex);
811            } catch (IllegalAccessException ex) {
812                throw new RuntimeException(ex);
813            }
814            try {
815                mInputType = inputType != EditorInfo.TYPE_NULL
816                        ? inputType
817                        : mInput.getInputType();
818            } catch (IncompatibleClassChangeError e) {
819                mInputType = EditorInfo.TYPE_CLASS_TEXT;
820            }
821        } else if (digits != null) {
822            mInput = DigitsKeyListener.getInstance(digits.toString());
823            // If no input type was specified, we will default to generic
824            // text, since we can't tell the IME about the set of digits
825            // that was selected.
826            mInputType = inputType != EditorInfo.TYPE_NULL
827                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
828        } else if (inputType != EditorInfo.TYPE_NULL) {
829            setInputType(inputType, true);
830            // If set, the input type overrides what was set using the deprecated singleLine flag.
831            singleLine = !isMultilineInputType(inputType);
832        } else if (phone) {
833            mInput = DialerKeyListener.getInstance();
834            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
835        } else if (numeric != 0) {
836            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
837                                                   (numeric & DECIMAL) != 0);
838            inputType = EditorInfo.TYPE_CLASS_NUMBER;
839            if ((numeric & SIGNED) != 0) {
840                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
841            }
842            if ((numeric & DECIMAL) != 0) {
843                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
844            }
845            mInputType = inputType;
846        } else if (autotext || autocap != -1) {
847            TextKeyListener.Capitalize cap;
848
849            inputType = EditorInfo.TYPE_CLASS_TEXT;
850
851            switch (autocap) {
852            case 1:
853                cap = TextKeyListener.Capitalize.SENTENCES;
854                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
855                break;
856
857            case 2:
858                cap = TextKeyListener.Capitalize.WORDS;
859                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
860                break;
861
862            case 3:
863                cap = TextKeyListener.Capitalize.CHARACTERS;
864                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
865                break;
866
867            default:
868                cap = TextKeyListener.Capitalize.NONE;
869                break;
870            }
871
872            mInput = TextKeyListener.getInstance(autotext, cap);
873            mInputType = inputType;
874        } else if (mTextIsSelectable) {
875            // Prevent text changes from keyboard.
876            mInputType = EditorInfo.TYPE_NULL;
877            mInput = null;
878            bufferType = BufferType.SPANNABLE;
879            // Required to request focus while in touch mode.
880            setFocusableInTouchMode(true);
881            // So that selection can be changed using arrow keys and touch is handled.
882            setMovementMethod(ArrowKeyMovementMethod.getInstance());
883        } else if (editable) {
884            mInput = TextKeyListener.getInstance();
885            mInputType = EditorInfo.TYPE_CLASS_TEXT;
886        } else {
887            mInput = null;
888
889            switch (buffertype) {
890                case 0:
891                    bufferType = BufferType.NORMAL;
892                    break;
893                case 1:
894                    bufferType = BufferType.SPANNABLE;
895                    break;
896                case 2:
897                    bufferType = BufferType.EDITABLE;
898                    break;
899            }
900        }
901
902        // mInputType has been set from inputType, possibly modified by mInputMethod.
903        // Specialize mInputType to [web]password if we have a text class and the original input
904        // type was a password.
905        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
906            if (password || passwordInputType) {
907                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
908                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
909            }
910            if (webPasswordInputType) {
911                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
912                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
913            }
914        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
915            if (numberPasswordInputType) {
916                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
917                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
918            }
919        }
920
921        if (selectallonfocus) {
922            mSelectAllOnFocus = true;
923
924            if (bufferType == BufferType.NORMAL)
925                bufferType = BufferType.SPANNABLE;
926        }
927
928        setCompoundDrawablesWithIntrinsicBounds(
929            drawableLeft, drawableTop, drawableRight, drawableBottom);
930        setCompoundDrawablePadding(drawablePadding);
931
932        // Same as setSingleLine(), but make sure the transformation method and the maximum number
933        // of lines of height are unchanged for multi-line TextViews.
934        setInputTypeSingleLine(singleLine);
935        applySingleLine(singleLine, singleLine, singleLine);
936
937        if (singleLine && mInput == null && ellipsize < 0) {
938                ellipsize = 3; // END
939        }
940
941        switch (ellipsize) {
942            case 1:
943                setEllipsize(TextUtils.TruncateAt.START);
944                break;
945            case 2:
946                setEllipsize(TextUtils.TruncateAt.MIDDLE);
947                break;
948            case 3:
949                setEllipsize(TextUtils.TruncateAt.END);
950                break;
951            case 4:
952                setHorizontalFadingEdgeEnabled(true);
953                setEllipsize(TextUtils.TruncateAt.MARQUEE);
954                break;
955        }
956
957        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
958        setHintTextColor(textColorHint);
959        setLinkTextColor(textColorLink);
960        if (textColorHighlight != 0) {
961            setHighlightColor(textColorHighlight);
962        }
963        setRawTextSize(textSize);
964
965        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
966            setTransformationMethod(PasswordTransformationMethod.getInstance());
967            typefaceIndex = MONOSPACE;
968        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
969                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
970            typefaceIndex = MONOSPACE;
971        }
972
973        setTypefaceByIndex(typefaceIndex, styleIndex);
974
975        if (shadowcolor != 0) {
976            setShadowLayer(r, dx, dy, shadowcolor);
977        }
978
979        if (maxlength >= 0) {
980            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
981        } else {
982            setFilters(NO_FILTERS);
983        }
984
985        setText(text, bufferType);
986        if (hint != null) setHint(hint);
987
988        /*
989         * Views are not normally focusable unless specified to be.
990         * However, TextViews that have input or movement methods *are*
991         * focusable by default.
992         */
993        a = context.obtainStyledAttributes(attrs,
994                                           com.android.internal.R.styleable.View,
995                                           defStyle, 0);
996
997        boolean focusable = mMovement != null || mInput != null;
998        boolean clickable = focusable;
999        boolean longClickable = focusable;
1000
1001        n = a.getIndexCount();
1002        for (int i = 0; i < n; i++) {
1003            int attr = a.getIndex(i);
1004
1005            switch (attr) {
1006            case com.android.internal.R.styleable.View_focusable:
1007                focusable = a.getBoolean(attr, focusable);
1008                break;
1009
1010            case com.android.internal.R.styleable.View_clickable:
1011                clickable = a.getBoolean(attr, clickable);
1012                break;
1013
1014            case com.android.internal.R.styleable.View_longClickable:
1015                longClickable = a.getBoolean(attr, longClickable);
1016                break;
1017            }
1018        }
1019        a.recycle();
1020
1021        setFocusable(focusable);
1022        setClickable(clickable);
1023        setLongClickable(longClickable);
1024
1025        prepareCursorControllers();
1026
1027        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1028        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1029        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1030    }
1031
1032    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1033        Typeface tf = null;
1034        switch (typefaceIndex) {
1035            case SANS:
1036                tf = Typeface.SANS_SERIF;
1037                break;
1038
1039            case SERIF:
1040                tf = Typeface.SERIF;
1041                break;
1042
1043            case MONOSPACE:
1044                tf = Typeface.MONOSPACE;
1045                break;
1046        }
1047
1048        setTypeface(tf, styleIndex);
1049    }
1050
1051    @Override
1052    public void setEnabled(boolean enabled) {
1053        if (enabled == isEnabled()) {
1054            return;
1055        }
1056
1057        if (!enabled) {
1058            // Hide the soft input if the currently active TextView is disabled
1059            InputMethodManager imm = InputMethodManager.peekInstance();
1060            if (imm != null && imm.isActive(this)) {
1061                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1062            }
1063        }
1064        super.setEnabled(enabled);
1065    }
1066
1067    /**
1068     * Sets the typeface and style in which the text should be displayed,
1069     * and turns on the fake bold and italic bits in the Paint if the
1070     * Typeface that you provided does not have all the bits in the
1071     * style that you specified.
1072     *
1073     * @attr ref android.R.styleable#TextView_typeface
1074     * @attr ref android.R.styleable#TextView_textStyle
1075     */
1076    public void setTypeface(Typeface tf, int style) {
1077        if (style > 0) {
1078            if (tf == null) {
1079                tf = Typeface.defaultFromStyle(style);
1080            } else {
1081                tf = Typeface.create(tf, style);
1082            }
1083
1084            setTypeface(tf);
1085            // now compute what (if any) algorithmic styling is needed
1086            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1087            int need = style & ~typefaceStyle;
1088            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1089            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1090        } else {
1091            mTextPaint.setFakeBoldText(false);
1092            mTextPaint.setTextSkewX(0);
1093            setTypeface(tf);
1094        }
1095    }
1096
1097    /**
1098     * Subclasses override this to specify that they have a KeyListener
1099     * by default even if not specifically called for in the XML options.
1100     */
1101    protected boolean getDefaultEditable() {
1102        return false;
1103    }
1104
1105    /**
1106     * Subclasses override this to specify a default movement method.
1107     */
1108    protected MovementMethod getDefaultMovementMethod() {
1109        return null;
1110    }
1111
1112    /**
1113     * Return the text the TextView is displaying. If setText() was called with
1114     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1115     * the return value from this method to Spannable or Editable, respectively.
1116     *
1117     * Note: The content of the return value should not be modified. If you want
1118     * a modifiable one, you should make your own copy first.
1119     */
1120    @ViewDebug.CapturedViewProperty
1121    public CharSequence getText() {
1122        return mText;
1123    }
1124
1125    /**
1126     * Returns the length, in characters, of the text managed by this TextView
1127     */
1128    public int length() {
1129        return mText.length();
1130    }
1131
1132    /**
1133     * Return the text the TextView is displaying as an Editable object.  If
1134     * the text is not editable, null is returned.
1135     *
1136     * @see #getText
1137     */
1138    public Editable getEditableText() {
1139        return (mText instanceof Editable) ? (Editable)mText : null;
1140    }
1141
1142    /**
1143     * @return the height of one standard line in pixels.  Note that markup
1144     * within the text can cause individual lines to be taller or shorter
1145     * than this height, and the layout may contain additional first-
1146     * or last-line padding.
1147     */
1148    public int getLineHeight() {
1149        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1150    }
1151
1152    /**
1153     * @return the Layout that is currently being used to display the text.
1154     * This can be null if the text or width has recently changes.
1155     */
1156    public final Layout getLayout() {
1157        return mLayout;
1158    }
1159
1160    /**
1161     * @return the current key listener for this TextView.
1162     * This will frequently be null for non-EditText TextViews.
1163     */
1164    public final KeyListener getKeyListener() {
1165        return mInput;
1166    }
1167
1168    /**
1169     * Sets the key listener to be used with this TextView.  This can be null
1170     * to disallow user input.  Note that this method has significant and
1171     * subtle interactions with soft keyboards and other input method:
1172     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1173     * for important details.  Calling this method will replace the current
1174     * content type of the text view with the content type returned by the
1175     * key listener.
1176     * <p>
1177     * Be warned that if you want a TextView with a key listener or movement
1178     * method not to be focusable, or if you want a TextView without a
1179     * key listener or movement method to be focusable, you must call
1180     * {@link #setFocusable} again after calling this to get the focusability
1181     * back the way you want it.
1182     *
1183     * @attr ref android.R.styleable#TextView_numeric
1184     * @attr ref android.R.styleable#TextView_digits
1185     * @attr ref android.R.styleable#TextView_phoneNumber
1186     * @attr ref android.R.styleable#TextView_inputMethod
1187     * @attr ref android.R.styleable#TextView_capitalize
1188     * @attr ref android.R.styleable#TextView_autoText
1189     */
1190    public void setKeyListener(KeyListener input) {
1191        setKeyListenerOnly(input);
1192        fixFocusableAndClickableSettings();
1193
1194        if (input != null) {
1195            try {
1196                mInputType = mInput.getInputType();
1197            } catch (IncompatibleClassChangeError e) {
1198                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1199            }
1200            // Change inputType, without affecting transformation.
1201            // No need to applySingleLine since mSingleLine is unchanged.
1202            setInputTypeSingleLine(mSingleLine);
1203        } else {
1204            mInputType = EditorInfo.TYPE_NULL;
1205        }
1206
1207        InputMethodManager imm = InputMethodManager.peekInstance();
1208        if (imm != null) imm.restartInput(this);
1209    }
1210
1211    private void setKeyListenerOnly(KeyListener input) {
1212        mInput = input;
1213        if (mInput != null && !(mText instanceof Editable))
1214            setText(mText);
1215
1216        setFilters((Editable) mText, mFilters);
1217    }
1218
1219    /**
1220     * @return the movement method being used for this TextView.
1221     * This will frequently be null for non-EditText TextViews.
1222     */
1223    public final MovementMethod getMovementMethod() {
1224        return mMovement;
1225    }
1226
1227    /**
1228     * Sets the movement method (arrow key handler) to be used for
1229     * this TextView.  This can be null to disallow using the arrow keys
1230     * to move the cursor or scroll the view.
1231     * <p>
1232     * Be warned that if you want a TextView with a key listener or movement
1233     * method not to be focusable, or if you want a TextView without a
1234     * key listener or movement method to be focusable, you must call
1235     * {@link #setFocusable} again after calling this to get the focusability
1236     * back the way you want it.
1237     */
1238    public final void setMovementMethod(MovementMethod movement) {
1239        mMovement = movement;
1240
1241        if (mMovement != null && !(mText instanceof Spannable))
1242            setText(mText);
1243
1244        fixFocusableAndClickableSettings();
1245
1246        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1247        prepareCursorControllers();
1248    }
1249
1250    private void fixFocusableAndClickableSettings() {
1251        if ((mMovement != null) || mInput != null) {
1252            setFocusable(true);
1253            setClickable(true);
1254            setLongClickable(true);
1255        } else {
1256            setFocusable(false);
1257            setClickable(false);
1258            setLongClickable(false);
1259        }
1260    }
1261
1262    /**
1263     * @return the current transformation method for this TextView.
1264     * This will frequently be null except for single-line and password
1265     * fields.
1266     */
1267    public final TransformationMethod getTransformationMethod() {
1268        return mTransformation;
1269    }
1270
1271    /**
1272     * Sets the transformation that is applied to the text that this
1273     * TextView is displaying.
1274     *
1275     * @attr ref android.R.styleable#TextView_password
1276     * @attr ref android.R.styleable#TextView_singleLine
1277     */
1278    public final void setTransformationMethod(TransformationMethod method) {
1279        if (method == mTransformation) {
1280            // Avoid the setText() below if the transformation is
1281            // the same.
1282            return;
1283        }
1284        if (mTransformation != null) {
1285            if (mText instanceof Spannable) {
1286                ((Spannable) mText).removeSpan(mTransformation);
1287            }
1288        }
1289
1290        mTransformation = method;
1291
1292        setText(mText);
1293    }
1294
1295    /**
1296     * Returns the top padding of the view, plus space for the top
1297     * Drawable if any.
1298     */
1299    public int getCompoundPaddingTop() {
1300        final Drawables dr = mDrawables;
1301        if (dr == null || dr.mDrawableTop == null) {
1302            return mPaddingTop;
1303        } else {
1304            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1305        }
1306    }
1307
1308    /**
1309     * Returns the bottom padding of the view, plus space for the bottom
1310     * Drawable if any.
1311     */
1312    public int getCompoundPaddingBottom() {
1313        final Drawables dr = mDrawables;
1314        if (dr == null || dr.mDrawableBottom == null) {
1315            return mPaddingBottom;
1316        } else {
1317            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1318        }
1319    }
1320
1321    /**
1322     * Returns the left padding of the view, plus space for the left
1323     * Drawable if any.
1324     */
1325    public int getCompoundPaddingLeft() {
1326        final Drawables dr = mDrawables;
1327        if (dr == null || dr.mDrawableLeft == null) {
1328            return mPaddingLeft;
1329        } else {
1330            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1331        }
1332    }
1333
1334    /**
1335     * Returns the right padding of the view, plus space for the right
1336     * Drawable if any.
1337     */
1338    public int getCompoundPaddingRight() {
1339        final Drawables dr = mDrawables;
1340        if (dr == null || dr.mDrawableRight == null) {
1341            return mPaddingRight;
1342        } else {
1343            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1344        }
1345    }
1346
1347    /**
1348     * Returns the extended top padding of the view, including both the
1349     * top Drawable if any and any extra space to keep more than maxLines
1350     * of text from showing.  It is only valid to call this after measuring.
1351     */
1352    public int getExtendedPaddingTop() {
1353        if (mMaxMode != LINES) {
1354            return getCompoundPaddingTop();
1355        }
1356
1357        if (mLayout.getLineCount() <= mMaximum) {
1358            return getCompoundPaddingTop();
1359        }
1360
1361        int top = getCompoundPaddingTop();
1362        int bottom = getCompoundPaddingBottom();
1363        int viewht = getHeight() - top - bottom;
1364        int layoutht = mLayout.getLineTop(mMaximum);
1365
1366        if (layoutht >= viewht) {
1367            return top;
1368        }
1369
1370        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1371        if (gravity == Gravity.TOP) {
1372            return top;
1373        } else if (gravity == Gravity.BOTTOM) {
1374            return top + viewht - layoutht;
1375        } else { // (gravity == Gravity.CENTER_VERTICAL)
1376            return top + (viewht - layoutht) / 2;
1377        }
1378    }
1379
1380    /**
1381     * Returns the extended bottom padding of the view, including both the
1382     * bottom Drawable if any and any extra space to keep more than maxLines
1383     * of text from showing.  It is only valid to call this after measuring.
1384     */
1385    public int getExtendedPaddingBottom() {
1386        if (mMaxMode != LINES) {
1387            return getCompoundPaddingBottom();
1388        }
1389
1390        if (mLayout.getLineCount() <= mMaximum) {
1391            return getCompoundPaddingBottom();
1392        }
1393
1394        int top = getCompoundPaddingTop();
1395        int bottom = getCompoundPaddingBottom();
1396        int viewht = getHeight() - top - bottom;
1397        int layoutht = mLayout.getLineTop(mMaximum);
1398
1399        if (layoutht >= viewht) {
1400            return bottom;
1401        }
1402
1403        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1404        if (gravity == Gravity.TOP) {
1405            return bottom + viewht - layoutht;
1406        } else if (gravity == Gravity.BOTTOM) {
1407            return bottom;
1408        } else { // (gravity == Gravity.CENTER_VERTICAL)
1409            return bottom + (viewht - layoutht) / 2;
1410        }
1411    }
1412
1413    /**
1414     * Returns the total left padding of the view, including the left
1415     * Drawable if any.
1416     */
1417    public int getTotalPaddingLeft() {
1418        return getCompoundPaddingLeft();
1419    }
1420
1421    /**
1422     * Returns the total right padding of the view, including the right
1423     * Drawable if any.
1424     */
1425    public int getTotalPaddingRight() {
1426        return getCompoundPaddingRight();
1427    }
1428
1429    /**
1430     * Returns the total top padding of the view, including the top
1431     * Drawable if any, the extra space to keep more than maxLines
1432     * from showing, and the vertical offset for gravity, if any.
1433     */
1434    public int getTotalPaddingTop() {
1435        return getExtendedPaddingTop() + getVerticalOffset(true);
1436    }
1437
1438    /**
1439     * Returns the total bottom padding of the view, including the bottom
1440     * Drawable if any, the extra space to keep more than maxLines
1441     * from showing, and the vertical offset for gravity, if any.
1442     */
1443    public int getTotalPaddingBottom() {
1444        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1445    }
1446
1447    /**
1448     * Sets the Drawables (if any) to appear to the left of, above,
1449     * to the right of, and below the text.  Use null if you do not
1450     * want a Drawable there.  The Drawables must already have had
1451     * {@link Drawable#setBounds} called.
1452     *
1453     * @attr ref android.R.styleable#TextView_drawableLeft
1454     * @attr ref android.R.styleable#TextView_drawableTop
1455     * @attr ref android.R.styleable#TextView_drawableRight
1456     * @attr ref android.R.styleable#TextView_drawableBottom
1457     */
1458    public void setCompoundDrawables(Drawable left, Drawable top,
1459                                     Drawable right, Drawable bottom) {
1460        Drawables dr = mDrawables;
1461
1462        final boolean drawables = left != null || top != null
1463                || right != null || bottom != null;
1464
1465        if (!drawables) {
1466            // Clearing drawables...  can we free the data structure?
1467            if (dr != null) {
1468                if (dr.mDrawablePadding == 0) {
1469                    mDrawables = null;
1470                } else {
1471                    // We need to retain the last set padding, so just clear
1472                    // out all of the fields in the existing structure.
1473                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1474                    dr.mDrawableLeft = null;
1475                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1476                    dr.mDrawableTop = null;
1477                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1478                    dr.mDrawableRight = null;
1479                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1480                    dr.mDrawableBottom = null;
1481                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1482                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1483                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1484                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1485                }
1486            }
1487        } else {
1488            if (dr == null) {
1489                mDrawables = dr = new Drawables();
1490            }
1491
1492            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1493                dr.mDrawableLeft.setCallback(null);
1494            }
1495            dr.mDrawableLeft = left;
1496
1497            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1498                dr.mDrawableTop.setCallback(null);
1499            }
1500            dr.mDrawableTop = top;
1501
1502            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1503                dr.mDrawableRight.setCallback(null);
1504            }
1505            dr.mDrawableRight = right;
1506
1507            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1508                dr.mDrawableBottom.setCallback(null);
1509            }
1510            dr.mDrawableBottom = bottom;
1511
1512            final Rect compoundRect = dr.mCompoundRect;
1513            int[] state;
1514
1515            state = getDrawableState();
1516
1517            if (left != null) {
1518                left.setState(state);
1519                left.copyBounds(compoundRect);
1520                left.setCallback(this);
1521                dr.mDrawableSizeLeft = compoundRect.width();
1522                dr.mDrawableHeightLeft = compoundRect.height();
1523            } else {
1524                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1525            }
1526
1527            if (right != null) {
1528                right.setState(state);
1529                right.copyBounds(compoundRect);
1530                right.setCallback(this);
1531                dr.mDrawableSizeRight = compoundRect.width();
1532                dr.mDrawableHeightRight = compoundRect.height();
1533            } else {
1534                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1535            }
1536
1537            if (top != null) {
1538                top.setState(state);
1539                top.copyBounds(compoundRect);
1540                top.setCallback(this);
1541                dr.mDrawableSizeTop = compoundRect.height();
1542                dr.mDrawableWidthTop = compoundRect.width();
1543            } else {
1544                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1545            }
1546
1547            if (bottom != null) {
1548                bottom.setState(state);
1549                bottom.copyBounds(compoundRect);
1550                bottom.setCallback(this);
1551                dr.mDrawableSizeBottom = compoundRect.height();
1552                dr.mDrawableWidthBottom = compoundRect.width();
1553            } else {
1554                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1555            }
1556        }
1557
1558        invalidate();
1559        requestLayout();
1560    }
1561
1562    /**
1563     * Sets the Drawables (if any) to appear to the left of, above,
1564     * to the right of, and below the text.  Use 0 if you do not
1565     * want a Drawable there. The Drawables' bounds will be set to
1566     * their intrinsic bounds.
1567     *
1568     * @param left Resource identifier of the left Drawable.
1569     * @param top Resource identifier of the top Drawable.
1570     * @param right Resource identifier of the right Drawable.
1571     * @param bottom Resource identifier of the bottom Drawable.
1572     *
1573     * @attr ref android.R.styleable#TextView_drawableLeft
1574     * @attr ref android.R.styleable#TextView_drawableTop
1575     * @attr ref android.R.styleable#TextView_drawableRight
1576     * @attr ref android.R.styleable#TextView_drawableBottom
1577     */
1578    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1579        final Resources resources = getContext().getResources();
1580        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1581                top != 0 ? resources.getDrawable(top) : null,
1582                right != 0 ? resources.getDrawable(right) : null,
1583                bottom != 0 ? resources.getDrawable(bottom) : null);
1584    }
1585
1586    /**
1587     * Sets the Drawables (if any) to appear to the left of, above,
1588     * to the right of, and below the text.  Use null if you do not
1589     * want a Drawable there. The Drawables' bounds will be set to
1590     * their intrinsic bounds.
1591     *
1592     * @attr ref android.R.styleable#TextView_drawableLeft
1593     * @attr ref android.R.styleable#TextView_drawableTop
1594     * @attr ref android.R.styleable#TextView_drawableRight
1595     * @attr ref android.R.styleable#TextView_drawableBottom
1596     */
1597    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1598            Drawable right, Drawable bottom) {
1599
1600        if (left != null) {
1601            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1602        }
1603        if (right != null) {
1604            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1605        }
1606        if (top != null) {
1607            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1608        }
1609        if (bottom != null) {
1610            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1611        }
1612        setCompoundDrawables(left, top, right, bottom);
1613    }
1614
1615    /**
1616     * Returns drawables for the left, top, right, and bottom borders.
1617     */
1618    public Drawable[] getCompoundDrawables() {
1619        final Drawables dr = mDrawables;
1620        if (dr != null) {
1621            return new Drawable[] {
1622                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1623            };
1624        } else {
1625            return new Drawable[] { null, null, null, null };
1626        }
1627    }
1628
1629    /**
1630     * Sets the size of the padding between the compound drawables and
1631     * the text.
1632     *
1633     * @attr ref android.R.styleable#TextView_drawablePadding
1634     */
1635    public void setCompoundDrawablePadding(int pad) {
1636        Drawables dr = mDrawables;
1637        if (pad == 0) {
1638            if (dr != null) {
1639                dr.mDrawablePadding = pad;
1640            }
1641        } else {
1642            if (dr == null) {
1643                mDrawables = dr = new Drawables();
1644            }
1645            dr.mDrawablePadding = pad;
1646        }
1647
1648        invalidate();
1649        requestLayout();
1650    }
1651
1652    /**
1653     * Returns the padding between the compound drawables and the text.
1654     */
1655    public int getCompoundDrawablePadding() {
1656        final Drawables dr = mDrawables;
1657        return dr != null ? dr.mDrawablePadding : 0;
1658    }
1659
1660    @Override
1661    public void setPadding(int left, int top, int right, int bottom) {
1662        if (left != mPaddingLeft ||
1663            right != mPaddingRight ||
1664            top != mPaddingTop ||
1665            bottom != mPaddingBottom) {
1666            nullLayouts();
1667        }
1668
1669        // the super call will requestLayout()
1670        super.setPadding(left, top, right, bottom);
1671        invalidate();
1672    }
1673
1674    /**
1675     * Gets the autolink mask of the text.  See {@link
1676     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1677     * possible values.
1678     *
1679     * @attr ref android.R.styleable#TextView_autoLink
1680     */
1681    public final int getAutoLinkMask() {
1682        return mAutoLinkMask;
1683    }
1684
1685    /**
1686     * Sets the text color, size, style, hint color, and highlight color
1687     * from the specified TextAppearance resource.
1688     */
1689    public void setTextAppearance(Context context, int resid) {
1690        TypedArray appearance =
1691            context.obtainStyledAttributes(resid,
1692                                           com.android.internal.R.styleable.TextAppearance);
1693
1694        int color;
1695        ColorStateList colors;
1696        int ts;
1697
1698        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1699        if (color != 0) {
1700            setHighlightColor(color);
1701        }
1702
1703        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1704                                              TextAppearance_textColor);
1705        if (colors != null) {
1706            setTextColor(colors);
1707        }
1708
1709        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1710                                              TextAppearance_textSize, 0);
1711        if (ts != 0) {
1712            setRawTextSize(ts);
1713        }
1714
1715        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1716                                              TextAppearance_textColorHint);
1717        if (colors != null) {
1718            setHintTextColor(colors);
1719        }
1720
1721        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1722                                              TextAppearance_textColorLink);
1723        if (colors != null) {
1724            setLinkTextColor(colors);
1725        }
1726
1727        int typefaceIndex, styleIndex;
1728
1729        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1730                                          TextAppearance_typeface, -1);
1731        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1732                                       TextAppearance_textStyle, -1);
1733
1734        setTypefaceByIndex(typefaceIndex, styleIndex);
1735
1736        appearance.recycle();
1737    }
1738
1739    /**
1740     * @return the size (in pixels) of the default text size in this TextView.
1741     */
1742    public float getTextSize() {
1743        return mTextPaint.getTextSize();
1744    }
1745
1746    /**
1747     * Set the default text size to the given value, interpreted as "scaled
1748     * pixel" units.  This size is adjusted based on the current density and
1749     * user font size preference.
1750     *
1751     * @param size The scaled pixel size.
1752     *
1753     * @attr ref android.R.styleable#TextView_textSize
1754     */
1755    @android.view.RemotableViewMethod
1756    public void setTextSize(float size) {
1757        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1758    }
1759
1760    /**
1761     * Set the default text size to a given unit and value.  See {@link
1762     * TypedValue} for the possible dimension units.
1763     *
1764     * @param unit The desired dimension unit.
1765     * @param size The desired size in the given units.
1766     *
1767     * @attr ref android.R.styleable#TextView_textSize
1768     */
1769    public void setTextSize(int unit, float size) {
1770        Context c = getContext();
1771        Resources r;
1772
1773        if (c == null)
1774            r = Resources.getSystem();
1775        else
1776            r = c.getResources();
1777
1778        setRawTextSize(TypedValue.applyDimension(
1779            unit, size, r.getDisplayMetrics()));
1780    }
1781
1782    private void setRawTextSize(float size) {
1783        if (size != mTextPaint.getTextSize()) {
1784            mTextPaint.setTextSize(size);
1785
1786            if (mLayout != null) {
1787                nullLayouts();
1788                requestLayout();
1789                invalidate();
1790            }
1791        }
1792    }
1793
1794    /**
1795     * @return the extent by which text is currently being stretched
1796     * horizontally.  This will usually be 1.
1797     */
1798    public float getTextScaleX() {
1799        return mTextPaint.getTextScaleX();
1800    }
1801
1802    /**
1803     * Sets the extent by which text should be stretched horizontally.
1804     *
1805     * @attr ref android.R.styleable#TextView_textScaleX
1806     */
1807    @android.view.RemotableViewMethod
1808    public void setTextScaleX(float size) {
1809        if (size != mTextPaint.getTextScaleX()) {
1810            mUserSetTextScaleX = true;
1811            mTextPaint.setTextScaleX(size);
1812
1813            if (mLayout != null) {
1814                nullLayouts();
1815                requestLayout();
1816                invalidate();
1817            }
1818        }
1819    }
1820
1821    /**
1822     * Sets the typeface and style in which the text should be displayed.
1823     * Note that not all Typeface families actually have bold and italic
1824     * variants, so you may need to use
1825     * {@link #setTypeface(Typeface, int)} to get the appearance
1826     * that you actually want.
1827     *
1828     * @attr ref android.R.styleable#TextView_typeface
1829     * @attr ref android.R.styleable#TextView_textStyle
1830     */
1831    public void setTypeface(Typeface tf) {
1832        if (mTextPaint.getTypeface() != tf) {
1833            mTextPaint.setTypeface(tf);
1834
1835            if (mLayout != null) {
1836                nullLayouts();
1837                requestLayout();
1838                invalidate();
1839            }
1840        }
1841    }
1842
1843    /**
1844     * @return the current typeface and style in which the text is being
1845     * displayed.
1846     */
1847    public Typeface getTypeface() {
1848        return mTextPaint.getTypeface();
1849    }
1850
1851    /**
1852     * Sets the text color for all the states (normal, selected,
1853     * focused) to be this color.
1854     *
1855     * @attr ref android.R.styleable#TextView_textColor
1856     */
1857    @android.view.RemotableViewMethod
1858    public void setTextColor(int color) {
1859        mTextColor = ColorStateList.valueOf(color);
1860        updateTextColors();
1861    }
1862
1863    /**
1864     * Sets the text color.
1865     *
1866     * @attr ref android.R.styleable#TextView_textColor
1867     */
1868    public void setTextColor(ColorStateList colors) {
1869        if (colors == null) {
1870            throw new NullPointerException();
1871        }
1872
1873        mTextColor = colors;
1874        updateTextColors();
1875    }
1876
1877    /**
1878     * Return the set of text colors.
1879     *
1880     * @return Returns the set of text colors.
1881     */
1882    public final ColorStateList getTextColors() {
1883        return mTextColor;
1884    }
1885
1886    /**
1887     * <p>Return the current color selected for normal text.</p>
1888     *
1889     * @return Returns the current text color.
1890     */
1891    public final int getCurrentTextColor() {
1892        return mCurTextColor;
1893    }
1894
1895    /**
1896     * Sets the color used to display the selection highlight.
1897     *
1898     * @attr ref android.R.styleable#TextView_textColorHighlight
1899     */
1900    @android.view.RemotableViewMethod
1901    public void setHighlightColor(int color) {
1902        if (mHighlightColor != color) {
1903            mHighlightColor = color;
1904            invalidate();
1905        }
1906    }
1907
1908    /**
1909     * Gives the text a shadow of the specified radius and color, the specified
1910     * distance from its normal position.
1911     *
1912     * @attr ref android.R.styleable#TextView_shadowColor
1913     * @attr ref android.R.styleable#TextView_shadowDx
1914     * @attr ref android.R.styleable#TextView_shadowDy
1915     * @attr ref android.R.styleable#TextView_shadowRadius
1916     */
1917    public void setShadowLayer(float radius, float dx, float dy, int color) {
1918        mTextPaint.setShadowLayer(radius, dx, dy, color);
1919
1920        mShadowRadius = radius;
1921        mShadowDx = dx;
1922        mShadowDy = dy;
1923
1924        invalidate();
1925    }
1926
1927    /**
1928     * @return the base paint used for the text.  Please use this only to
1929     * consult the Paint's properties and not to change them.
1930     */
1931    public TextPaint getPaint() {
1932        return mTextPaint;
1933    }
1934
1935    /**
1936     * Sets the autolink mask of the text.  See {@link
1937     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1938     * possible values.
1939     *
1940     * @attr ref android.R.styleable#TextView_autoLink
1941     */
1942    @android.view.RemotableViewMethod
1943    public final void setAutoLinkMask(int mask) {
1944        mAutoLinkMask = mask;
1945    }
1946
1947    /**
1948     * Sets whether the movement method will automatically be set to
1949     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1950     * set to nonzero and links are detected in {@link #setText}.
1951     * The default is true.
1952     *
1953     * @attr ref android.R.styleable#TextView_linksClickable
1954     */
1955    @android.view.RemotableViewMethod
1956    public final void setLinksClickable(boolean whether) {
1957        mLinksClickable = whether;
1958    }
1959
1960    /**
1961     * Returns whether the movement method will automatically be set to
1962     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1963     * set to nonzero and links are detected in {@link #setText}.
1964     * The default is true.
1965     *
1966     * @attr ref android.R.styleable#TextView_linksClickable
1967     */
1968    public final boolean getLinksClickable() {
1969        return mLinksClickable;
1970    }
1971
1972    /**
1973     * Returns the list of URLSpans attached to the text
1974     * (by {@link Linkify} or otherwise) if any.  You can call
1975     * {@link URLSpan#getURL} on them to find where they link to
1976     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1977     * to find the region of the text they are attached to.
1978     */
1979    public URLSpan[] getUrls() {
1980        if (mText instanceof Spanned) {
1981            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1982        } else {
1983            return new URLSpan[0];
1984        }
1985    }
1986
1987    /**
1988     * Sets the color of the hint text.
1989     *
1990     * @attr ref android.R.styleable#TextView_textColorHint
1991     */
1992    @android.view.RemotableViewMethod
1993    public final void setHintTextColor(int color) {
1994        mHintTextColor = ColorStateList.valueOf(color);
1995        updateTextColors();
1996    }
1997
1998    /**
1999     * Sets the color of the hint text.
2000     *
2001     * @attr ref android.R.styleable#TextView_textColorHint
2002     */
2003    public final void setHintTextColor(ColorStateList colors) {
2004        mHintTextColor = colors;
2005        updateTextColors();
2006    }
2007
2008    /**
2009     * <p>Return the color used to paint the hint text.</p>
2010     *
2011     * @return Returns the list of hint text colors.
2012     */
2013    public final ColorStateList getHintTextColors() {
2014        return mHintTextColor;
2015    }
2016
2017    /**
2018     * <p>Return the current color selected to paint the hint text.</p>
2019     *
2020     * @return Returns the current hint text color.
2021     */
2022    public final int getCurrentHintTextColor() {
2023        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2024    }
2025
2026    /**
2027     * Sets the color of links in the text.
2028     *
2029     * @attr ref android.R.styleable#TextView_textColorLink
2030     */
2031    @android.view.RemotableViewMethod
2032    public final void setLinkTextColor(int color) {
2033        mLinkTextColor = ColorStateList.valueOf(color);
2034        updateTextColors();
2035    }
2036
2037    /**
2038     * Sets the color of links in the text.
2039     *
2040     * @attr ref android.R.styleable#TextView_textColorLink
2041     */
2042    public final void setLinkTextColor(ColorStateList colors) {
2043        mLinkTextColor = colors;
2044        updateTextColors();
2045    }
2046
2047    /**
2048     * <p>Returns the color used to paint links in the text.</p>
2049     *
2050     * @return Returns the list of link text colors.
2051     */
2052    public final ColorStateList getLinkTextColors() {
2053        return mLinkTextColor;
2054    }
2055
2056    /**
2057     * Sets the horizontal alignment of the text and the
2058     * vertical gravity that will be used when there is extra space
2059     * in the TextView beyond what is required for the text itself.
2060     *
2061     * @see android.view.Gravity
2062     * @attr ref android.R.styleable#TextView_gravity
2063     */
2064    public void setGravity(int gravity) {
2065        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
2066            gravity |= Gravity.LEFT;
2067        }
2068        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2069            gravity |= Gravity.TOP;
2070        }
2071
2072        boolean newLayout = false;
2073
2074        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
2075            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
2076            newLayout = true;
2077        }
2078
2079        if (gravity != mGravity) {
2080            invalidate();
2081        }
2082
2083        mGravity = gravity;
2084
2085        if (mLayout != null && newLayout) {
2086            // XXX this is heavy-handed because no actual content changes.
2087            int want = mLayout.getWidth();
2088            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2089
2090            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2091                          mRight - mLeft - getCompoundPaddingLeft() -
2092                          getCompoundPaddingRight(), true);
2093        }
2094    }
2095
2096    /**
2097     * Returns the horizontal and vertical alignment of this TextView.
2098     *
2099     * @see android.view.Gravity
2100     * @attr ref android.R.styleable#TextView_gravity
2101     */
2102    public int getGravity() {
2103        return mGravity;
2104    }
2105
2106    /**
2107     * @return the flags on the Paint being used to display the text.
2108     * @see Paint#getFlags
2109     */
2110    public int getPaintFlags() {
2111        return mTextPaint.getFlags();
2112    }
2113
2114    /**
2115     * Sets flags on the Paint being used to display the text and
2116     * reflows the text if they are different from the old flags.
2117     * @see Paint#setFlags
2118     */
2119    @android.view.RemotableViewMethod
2120    public void setPaintFlags(int flags) {
2121        if (mTextPaint.getFlags() != flags) {
2122            mTextPaint.setFlags(flags);
2123
2124            if (mLayout != null) {
2125                nullLayouts();
2126                requestLayout();
2127                invalidate();
2128            }
2129        }
2130    }
2131
2132    /**
2133     * Sets whether the text should be allowed to be wider than the
2134     * View is.  If false, it will be wrapped to the width of the View.
2135     *
2136     * @attr ref android.R.styleable#TextView_scrollHorizontally
2137     */
2138    public void setHorizontallyScrolling(boolean whether) {
2139        mHorizontallyScrolling = whether;
2140
2141        if (mLayout != null) {
2142            nullLayouts();
2143            requestLayout();
2144            invalidate();
2145        }
2146    }
2147
2148    /**
2149     * Makes the TextView at least this many lines tall.
2150     *
2151     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2152     * set this value to 1.
2153     *
2154     * @attr ref android.R.styleable#TextView_minLines
2155     */
2156    @android.view.RemotableViewMethod
2157    public void setMinLines(int minlines) {
2158        mMinimum = minlines;
2159        mMinMode = LINES;
2160
2161        requestLayout();
2162        invalidate();
2163    }
2164
2165    /**
2166     * Makes the TextView at least this many pixels tall.
2167     *
2168     * Setting this value overrides any other (minimum) number of lines setting.
2169     *
2170     * @attr ref android.R.styleable#TextView_minHeight
2171     */
2172    @android.view.RemotableViewMethod
2173    public void setMinHeight(int minHeight) {
2174        mMinimum = minHeight;
2175        mMinMode = PIXELS;
2176
2177        requestLayout();
2178        invalidate();
2179    }
2180
2181    /**
2182     * Makes the TextView at most this many lines tall.
2183     *
2184     * Setting this value overrides any other (maximum) height setting.
2185     *
2186     * @attr ref android.R.styleable#TextView_maxLines
2187     */
2188    @android.view.RemotableViewMethod
2189    public void setMaxLines(int maxlines) {
2190        mMaximum = maxlines;
2191        mMaxMode = LINES;
2192
2193        requestLayout();
2194        invalidate();
2195    }
2196
2197    /**
2198     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2199     * {@link #setMaxLines(int)} method.
2200     *
2201     * Setting this value overrides any other (maximum) number of lines setting.
2202     *
2203     * @attr ref android.R.styleable#TextView_maxHeight
2204     */
2205    @android.view.RemotableViewMethod
2206    public void setMaxHeight(int maxHeight) {
2207        mMaximum = maxHeight;
2208        mMaxMode = PIXELS;
2209
2210        requestLayout();
2211        invalidate();
2212    }
2213
2214    /**
2215     * Makes the TextView exactly this many lines tall.
2216     *
2217     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2218     * height setting. A single line TextView will set this value to 1.
2219     *
2220     * @attr ref android.R.styleable#TextView_lines
2221     */
2222    @android.view.RemotableViewMethod
2223    public void setLines(int lines) {
2224        mMaximum = mMinimum = lines;
2225        mMaxMode = mMinMode = LINES;
2226
2227        requestLayout();
2228        invalidate();
2229    }
2230
2231    /**
2232     * Makes the TextView exactly this many pixels tall.
2233     * You could do the same thing by specifying this number in the
2234     * LayoutParams.
2235     *
2236     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2237     * height setting.
2238     *
2239     * @attr ref android.R.styleable#TextView_height
2240     */
2241    @android.view.RemotableViewMethod
2242    public void setHeight(int pixels) {
2243        mMaximum = mMinimum = pixels;
2244        mMaxMode = mMinMode = PIXELS;
2245
2246        requestLayout();
2247        invalidate();
2248    }
2249
2250    /**
2251     * Makes the TextView at least this many ems wide
2252     *
2253     * @attr ref android.R.styleable#TextView_minEms
2254     */
2255    @android.view.RemotableViewMethod
2256    public void setMinEms(int minems) {
2257        mMinWidth = minems;
2258        mMinWidthMode = EMS;
2259
2260        requestLayout();
2261        invalidate();
2262    }
2263
2264    /**
2265     * Makes the TextView at least this many pixels wide
2266     *
2267     * @attr ref android.R.styleable#TextView_minWidth
2268     */
2269    @android.view.RemotableViewMethod
2270    public void setMinWidth(int minpixels) {
2271        mMinWidth = minpixels;
2272        mMinWidthMode = PIXELS;
2273
2274        requestLayout();
2275        invalidate();
2276    }
2277
2278    /**
2279     * Makes the TextView at most this many ems wide
2280     *
2281     * @attr ref android.R.styleable#TextView_maxEms
2282     */
2283    @android.view.RemotableViewMethod
2284    public void setMaxEms(int maxems) {
2285        mMaxWidth = maxems;
2286        mMaxWidthMode = EMS;
2287
2288        requestLayout();
2289        invalidate();
2290    }
2291
2292    /**
2293     * Makes the TextView at most this many pixels wide
2294     *
2295     * @attr ref android.R.styleable#TextView_maxWidth
2296     */
2297    @android.view.RemotableViewMethod
2298    public void setMaxWidth(int maxpixels) {
2299        mMaxWidth = maxpixels;
2300        mMaxWidthMode = PIXELS;
2301
2302        requestLayout();
2303        invalidate();
2304    }
2305
2306    /**
2307     * Makes the TextView exactly this many ems wide
2308     *
2309     * @attr ref android.R.styleable#TextView_ems
2310     */
2311    @android.view.RemotableViewMethod
2312    public void setEms(int ems) {
2313        mMaxWidth = mMinWidth = ems;
2314        mMaxWidthMode = mMinWidthMode = EMS;
2315
2316        requestLayout();
2317        invalidate();
2318    }
2319
2320    /**
2321     * Makes the TextView exactly this many pixels wide.
2322     * You could do the same thing by specifying this number in the
2323     * LayoutParams.
2324     *
2325     * @attr ref android.R.styleable#TextView_width
2326     */
2327    @android.view.RemotableViewMethod
2328    public void setWidth(int pixels) {
2329        mMaxWidth = mMinWidth = pixels;
2330        mMaxWidthMode = mMinWidthMode = PIXELS;
2331
2332        requestLayout();
2333        invalidate();
2334    }
2335
2336
2337    /**
2338     * Sets line spacing for this TextView.  Each line will have its height
2339     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2340     *
2341     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2342     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2343     */
2344    public void setLineSpacing(float add, float mult) {
2345        mSpacingMult = mult;
2346        mSpacingAdd = add;
2347
2348        if (mLayout != null) {
2349            nullLayouts();
2350            requestLayout();
2351            invalidate();
2352        }
2353    }
2354
2355    /**
2356     * Convenience method: Append the specified text to the TextView's
2357     * display buffer, upgrading it to BufferType.EDITABLE if it was
2358     * not already editable.
2359     */
2360    public final void append(CharSequence text) {
2361        append(text, 0, text.length());
2362    }
2363
2364    /**
2365     * Convenience method: Append the specified text slice to the TextView's
2366     * display buffer, upgrading it to BufferType.EDITABLE if it was
2367     * not already editable.
2368     */
2369    public void append(CharSequence text, int start, int end) {
2370        if (!(mText instanceof Editable)) {
2371            setText(mText, BufferType.EDITABLE);
2372        }
2373
2374        ((Editable) mText).append(text, start, end);
2375    }
2376
2377    private void updateTextColors() {
2378        boolean inval = false;
2379        int color = mTextColor.getColorForState(getDrawableState(), 0);
2380        if (color != mCurTextColor) {
2381            mCurTextColor = color;
2382            inval = true;
2383        }
2384        if (mLinkTextColor != null) {
2385            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2386            if (color != mTextPaint.linkColor) {
2387                mTextPaint.linkColor = color;
2388                inval = true;
2389            }
2390        }
2391        if (mHintTextColor != null) {
2392            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2393            if (color != mCurHintTextColor && mText.length() == 0) {
2394                mCurHintTextColor = color;
2395                inval = true;
2396            }
2397        }
2398        if (inval) {
2399            invalidate();
2400        }
2401    }
2402
2403    @Override
2404    protected void drawableStateChanged() {
2405        super.drawableStateChanged();
2406        if (mTextColor != null && mTextColor.isStateful()
2407                || (mHintTextColor != null && mHintTextColor.isStateful())
2408                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2409            updateTextColors();
2410        }
2411
2412        final Drawables dr = mDrawables;
2413        if (dr != null) {
2414            int[] state = getDrawableState();
2415            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2416                dr.mDrawableTop.setState(state);
2417            }
2418            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2419                dr.mDrawableBottom.setState(state);
2420            }
2421            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2422                dr.mDrawableLeft.setState(state);
2423            }
2424            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2425                dr.mDrawableRight.setState(state);
2426            }
2427        }
2428    }
2429
2430    /**
2431     * User interface state that is stored by TextView for implementing
2432     * {@link View#onSaveInstanceState}.
2433     */
2434    public static class SavedState extends BaseSavedState {
2435        int selStart;
2436        int selEnd;
2437        CharSequence text;
2438        boolean frozenWithFocus;
2439        CharSequence error;
2440
2441        SavedState(Parcelable superState) {
2442            super(superState);
2443        }
2444
2445        @Override
2446        public void writeToParcel(Parcel out, int flags) {
2447            super.writeToParcel(out, flags);
2448            out.writeInt(selStart);
2449            out.writeInt(selEnd);
2450            out.writeInt(frozenWithFocus ? 1 : 0);
2451            TextUtils.writeToParcel(text, out, flags);
2452
2453            if (error == null) {
2454                out.writeInt(0);
2455            } else {
2456                out.writeInt(1);
2457                TextUtils.writeToParcel(error, out, flags);
2458            }
2459        }
2460
2461        @Override
2462        public String toString() {
2463            String str = "TextView.SavedState{"
2464                    + Integer.toHexString(System.identityHashCode(this))
2465                    + " start=" + selStart + " end=" + selEnd;
2466            if (text != null) {
2467                str += " text=" + text;
2468            }
2469            return str + "}";
2470        }
2471
2472        @SuppressWarnings("hiding")
2473        public static final Parcelable.Creator<SavedState> CREATOR
2474                = new Parcelable.Creator<SavedState>() {
2475            public SavedState createFromParcel(Parcel in) {
2476                return new SavedState(in);
2477            }
2478
2479            public SavedState[] newArray(int size) {
2480                return new SavedState[size];
2481            }
2482        };
2483
2484        private SavedState(Parcel in) {
2485            super(in);
2486            selStart = in.readInt();
2487            selEnd = in.readInt();
2488            frozenWithFocus = (in.readInt() != 0);
2489            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2490
2491            if (in.readInt() != 0) {
2492                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2493            }
2494        }
2495    }
2496
2497    @Override
2498    public Parcelable onSaveInstanceState() {
2499        Parcelable superState = super.onSaveInstanceState();
2500
2501        // Save state if we are forced to
2502        boolean save = mFreezesText;
2503        int start = 0;
2504        int end = 0;
2505
2506        if (mText != null) {
2507            start = getSelectionStart();
2508            end = getSelectionEnd();
2509            if (start >= 0 || end >= 0) {
2510                // Or save state if there is a selection
2511                save = true;
2512            }
2513        }
2514
2515        if (save) {
2516            SavedState ss = new SavedState(superState);
2517            // XXX Should also save the current scroll position!
2518            ss.selStart = start;
2519            ss.selEnd = end;
2520
2521            if (mText instanceof Spanned) {
2522                /*
2523                 * Calling setText() strips off any ChangeWatchers;
2524                 * strip them now to avoid leaking references.
2525                 * But do it to a copy so that if there are any
2526                 * further changes to the text of this view, it
2527                 * won't get into an inconsistent state.
2528                 */
2529
2530                Spannable sp = new SpannableString(mText);
2531
2532                for (ChangeWatcher cw :
2533                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2534                    sp.removeSpan(cw);
2535                }
2536
2537                ss.text = sp;
2538            } else {
2539                ss.text = mText.toString();
2540            }
2541
2542            if (isFocused() && start >= 0 && end >= 0) {
2543                ss.frozenWithFocus = true;
2544            }
2545
2546            ss.error = mError;
2547
2548            return ss;
2549        }
2550
2551        return superState;
2552    }
2553
2554    @Override
2555    public void onRestoreInstanceState(Parcelable state) {
2556        if (!(state instanceof SavedState)) {
2557            super.onRestoreInstanceState(state);
2558            return;
2559        }
2560
2561        SavedState ss = (SavedState)state;
2562        super.onRestoreInstanceState(ss.getSuperState());
2563
2564        // XXX restore buffer type too, as well as lots of other stuff
2565        if (ss.text != null) {
2566            setText(ss.text);
2567        }
2568
2569        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2570            if (mText instanceof Spannable) {
2571                int len = mText.length();
2572
2573                if (ss.selStart > len || ss.selEnd > len) {
2574                    String restored = "";
2575
2576                    if (ss.text != null) {
2577                        restored = "(restored) ";
2578                    }
2579
2580                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2581                          "/" + ss.selEnd + " out of range for " + restored +
2582                          "text " + mText);
2583                } else {
2584                    Selection.setSelection((Spannable) mText, ss.selStart,
2585                                           ss.selEnd);
2586
2587                    if (ss.frozenWithFocus) {
2588                        mFrozenWithFocus = true;
2589                    }
2590                }
2591            }
2592        }
2593
2594        if (ss.error != null) {
2595            final CharSequence error = ss.error;
2596            // Display the error later, after the first layout pass
2597            post(new Runnable() {
2598                public void run() {
2599                    setError(error);
2600                }
2601            });
2602        }
2603    }
2604
2605    /**
2606     * Control whether this text view saves its entire text contents when
2607     * freezing to an icicle, in addition to dynamic state such as cursor
2608     * position.  By default this is false, not saving the text.  Set to true
2609     * if the text in the text view is not being saved somewhere else in
2610     * persistent storage (such as in a content provider) so that if the
2611     * view is later thawed the user will not lose their data.
2612     *
2613     * @param freezesText Controls whether a frozen icicle should include the
2614     * entire text data: true to include it, false to not.
2615     *
2616     * @attr ref android.R.styleable#TextView_freezesText
2617     */
2618    @android.view.RemotableViewMethod
2619    public void setFreezesText(boolean freezesText) {
2620        mFreezesText = freezesText;
2621    }
2622
2623    /**
2624     * Return whether this text view is including its entire text contents
2625     * in frozen icicles.
2626     *
2627     * @return Returns true if text is included, false if it isn't.
2628     *
2629     * @see #setFreezesText
2630     */
2631    public boolean getFreezesText() {
2632        return mFreezesText;
2633    }
2634
2635    ///////////////////////////////////////////////////////////////////////////
2636
2637    /**
2638     * Sets the Factory used to create new Editables.
2639     */
2640    public final void setEditableFactory(Editable.Factory factory) {
2641        mEditableFactory = factory;
2642        setText(mText);
2643    }
2644
2645    /**
2646     * Sets the Factory used to create new Spannables.
2647     */
2648    public final void setSpannableFactory(Spannable.Factory factory) {
2649        mSpannableFactory = factory;
2650        setText(mText);
2651    }
2652
2653    /**
2654     * Sets the string value of the TextView. TextView <em>does not</em> accept
2655     * HTML-like formatting, which you can do with text strings in XML resource files.
2656     * To style your strings, attach android.text.style.* objects to a
2657     * {@link android.text.SpannableString SpannableString}, or see the
2658     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2659     * Available Resource Types</a> documentation for an example of setting
2660     * formatted text in the XML resource file.
2661     *
2662     * @attr ref android.R.styleable#TextView_text
2663     */
2664    @android.view.RemotableViewMethod
2665    public final void setText(CharSequence text) {
2666        setText(text, mBufferType);
2667    }
2668
2669    /**
2670     * Like {@link #setText(CharSequence)},
2671     * except that the cursor position (if any) is retained in the new text.
2672     *
2673     * @param text The new text to place in the text view.
2674     *
2675     * @see #setText(CharSequence)
2676     */
2677    @android.view.RemotableViewMethod
2678    public final void setTextKeepState(CharSequence text) {
2679        setTextKeepState(text, mBufferType);
2680    }
2681
2682    /**
2683     * Sets the text that this TextView is to display (see
2684     * {@link #setText(CharSequence)}) and also sets whether it is stored
2685     * in a styleable/spannable buffer and whether it is editable.
2686     *
2687     * @attr ref android.R.styleable#TextView_text
2688     * @attr ref android.R.styleable#TextView_bufferType
2689     */
2690    public void setText(CharSequence text, BufferType type) {
2691        setText(text, type, true, 0);
2692
2693        if (mCharWrapper != null) {
2694            mCharWrapper.mChars = null;
2695        }
2696    }
2697
2698    private void setText(CharSequence text, BufferType type,
2699                         boolean notifyBefore, int oldlen) {
2700        if (text == null) {
2701            text = "";
2702        }
2703
2704        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2705
2706        if (text instanceof Spanned &&
2707            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2708            setHorizontalFadingEdgeEnabled(true);
2709            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2710        }
2711
2712        int n = mFilters.length;
2713        for (int i = 0; i < n; i++) {
2714            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2715                                                  EMPTY_SPANNED, 0, 0);
2716            if (out != null) {
2717                text = out;
2718            }
2719        }
2720
2721        if (notifyBefore) {
2722            if (mText != null) {
2723                oldlen = mText.length();
2724                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2725            } else {
2726                sendBeforeTextChanged("", 0, 0, text.length());
2727            }
2728        }
2729
2730        boolean needEditableForNotification = false;
2731
2732        if (mListeners != null && mListeners.size() != 0) {
2733            needEditableForNotification = true;
2734        }
2735
2736        if (type == BufferType.EDITABLE || mInput != null ||
2737            needEditableForNotification) {
2738            Editable t = mEditableFactory.newEditable(text);
2739            text = t;
2740            setFilters(t, mFilters);
2741            InputMethodManager imm = InputMethodManager.peekInstance();
2742            if (imm != null) imm.restartInput(this);
2743        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2744            text = mSpannableFactory.newSpannable(text);
2745        } else if (!(text instanceof CharWrapper)) {
2746            text = TextUtils.stringOrSpannedString(text);
2747        }
2748
2749        if (mAutoLinkMask != 0) {
2750            Spannable s2;
2751
2752            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2753                s2 = (Spannable) text;
2754            } else {
2755                s2 = mSpannableFactory.newSpannable(text);
2756            }
2757
2758            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2759                text = s2;
2760                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2761
2762                /*
2763                 * We must go ahead and set the text before changing the
2764                 * movement method, because setMovementMethod() may call
2765                 * setText() again to try to upgrade the buffer type.
2766                 */
2767                mText = text;
2768
2769                // Do not change the movement method for text that support text selection as it
2770                // would prevent an arbitrary cursor displacement.
2771                final boolean hasTextSelection = this instanceof EditText || mTextIsSelectable;
2772                if (mLinksClickable && !hasTextSelection) {
2773                    setMovementMethod(LinkMovementMethod.getInstance());
2774                }
2775            }
2776        }
2777
2778        mBufferType = type;
2779        mText = text;
2780
2781        if (mTransformation == null)
2782            mTransformed = text;
2783        else
2784            mTransformed = mTransformation.getTransformation(text, this);
2785
2786        final int textLength = text.length();
2787
2788        if (text instanceof Spannable) {
2789            Spannable sp = (Spannable) text;
2790
2791            // Remove any ChangeWatchers that might have come
2792            // from other TextViews.
2793            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2794            final int count = watchers.length;
2795            for (int i = 0; i < count; i++)
2796                sp.removeSpan(watchers[i]);
2797
2798            if (mChangeWatcher == null)
2799                mChangeWatcher = new ChangeWatcher();
2800
2801            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2802                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2803
2804            if (mInput != null) {
2805                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2806            }
2807
2808            if (mTransformation != null) {
2809                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2810
2811            }
2812
2813            if (mMovement != null) {
2814                mMovement.initialize(this, (Spannable) text);
2815
2816                /*
2817                 * Initializing the movement method will have set the
2818                 * selection, so reset mSelectionMoved to keep that from
2819                 * interfering with the normal on-focus selection-setting.
2820                 */
2821                mSelectionMoved = false;
2822            }
2823        }
2824
2825        if (mLayout != null) {
2826            checkForRelayout();
2827        }
2828
2829        sendOnTextChanged(text, 0, oldlen, textLength);
2830        onTextChanged(text, 0, oldlen, textLength);
2831
2832        if (needEditableForNotification) {
2833            sendAfterTextChanged((Editable) text);
2834        }
2835
2836        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
2837        prepareCursorControllers();
2838    }
2839
2840    /**
2841     * Sets the TextView to display the specified slice of the specified
2842     * char array.  You must promise that you will not change the contents
2843     * of the array except for right before another call to setText(),
2844     * since the TextView has no way to know that the text
2845     * has changed and that it needs to invalidate and re-layout.
2846     */
2847    public final void setText(char[] text, int start, int len) {
2848        int oldlen = 0;
2849
2850        if (start < 0 || len < 0 || start + len > text.length) {
2851            throw new IndexOutOfBoundsException(start + ", " + len);
2852        }
2853
2854        /*
2855         * We must do the before-notification here ourselves because if
2856         * the old text is a CharWrapper we destroy it before calling
2857         * into the normal path.
2858         */
2859        if (mText != null) {
2860            oldlen = mText.length();
2861            sendBeforeTextChanged(mText, 0, oldlen, len);
2862        } else {
2863            sendBeforeTextChanged("", 0, 0, len);
2864        }
2865
2866        if (mCharWrapper == null) {
2867            mCharWrapper = new CharWrapper(text, start, len);
2868        } else {
2869            mCharWrapper.set(text, start, len);
2870        }
2871
2872        setText(mCharWrapper, mBufferType, false, oldlen);
2873    }
2874
2875    private static class CharWrapper
2876            implements CharSequence, GetChars, GraphicsOperations {
2877        private char[] mChars;
2878        private int mStart, mLength;
2879
2880        public CharWrapper(char[] chars, int start, int len) {
2881            mChars = chars;
2882            mStart = start;
2883            mLength = len;
2884        }
2885
2886        /* package */ void set(char[] chars, int start, int len) {
2887            mChars = chars;
2888            mStart = start;
2889            mLength = len;
2890        }
2891
2892        public int length() {
2893            return mLength;
2894        }
2895
2896        public char charAt(int off) {
2897            return mChars[off + mStart];
2898        }
2899
2900        @Override
2901        public String toString() {
2902            return new String(mChars, mStart, mLength);
2903        }
2904
2905        public CharSequence subSequence(int start, int end) {
2906            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2907                throw new IndexOutOfBoundsException(start + ", " + end);
2908            }
2909
2910            return new String(mChars, start + mStart, end - start);
2911        }
2912
2913        public void getChars(int start, int end, char[] buf, int off) {
2914            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2915                throw new IndexOutOfBoundsException(start + ", " + end);
2916            }
2917
2918            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2919        }
2920
2921        public void drawText(Canvas c, int start, int end,
2922                             float x, float y, Paint p) {
2923            c.drawText(mChars, start + mStart, end - start, x, y, p);
2924        }
2925
2926        public void drawTextRun(Canvas c, int start, int end,
2927                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
2928            int count = end - start;
2929            int contextCount = contextEnd - contextStart;
2930            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
2931                    contextCount, x, y, flags, p);
2932        }
2933
2934        public float measureText(int start, int end, Paint p) {
2935            return p.measureText(mChars, start + mStart, end - start);
2936        }
2937
2938        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2939            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2940        }
2941
2942        public float getTextRunAdvances(int start, int end, int contextStart,
2943                int contextEnd, int flags, float[] advances, int advancesIndex,
2944                Paint p) {
2945            int count = end - start;
2946            int contextCount = contextEnd - contextStart;
2947            return p.getTextRunAdvances(mChars, start + mStart, count,
2948                    contextStart + mStart, contextCount, flags, advances,
2949                    advancesIndex);
2950        }
2951
2952        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
2953                int offset, int cursorOpt, Paint p) {
2954            int contextCount = contextEnd - contextStart;
2955            return p.getTextRunCursor(mChars, contextStart + mStart,
2956                    contextCount, flags, offset + mStart, cursorOpt);
2957        }
2958    }
2959
2960    /**
2961     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2962     * except that the cursor position (if any) is retained in the new text.
2963     *
2964     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2965     */
2966    public final void setTextKeepState(CharSequence text, BufferType type) {
2967        int start = getSelectionStart();
2968        int end = getSelectionEnd();
2969        int len = text.length();
2970
2971        setText(text, type);
2972
2973        if (start >= 0 || end >= 0) {
2974            if (mText instanceof Spannable) {
2975                Selection.setSelection((Spannable) mText,
2976                                       Math.max(0, Math.min(start, len)),
2977                                       Math.max(0, Math.min(end, len)));
2978            }
2979        }
2980    }
2981
2982    @android.view.RemotableViewMethod
2983    public final void setText(int resid) {
2984        setText(getContext().getResources().getText(resid));
2985    }
2986
2987    public final void setText(int resid, BufferType type) {
2988        setText(getContext().getResources().getText(resid), type);
2989    }
2990
2991    /**
2992     * Sets the text to be displayed when the text of the TextView is empty.
2993     * Null means to use the normal empty text. The hint does not currently
2994     * participate in determining the size of the view.
2995     *
2996     * @attr ref android.R.styleable#TextView_hint
2997     */
2998    @android.view.RemotableViewMethod
2999    public final void setHint(CharSequence hint) {
3000        mHint = TextUtils.stringOrSpannedString(hint);
3001
3002        if (mLayout != null) {
3003            checkForRelayout();
3004        }
3005
3006        if (mText.length() == 0) {
3007            invalidate();
3008        }
3009    }
3010
3011    /**
3012     * Sets the text to be displayed when the text of the TextView is empty,
3013     * from a resource.
3014     *
3015     * @attr ref android.R.styleable#TextView_hint
3016     */
3017    @android.view.RemotableViewMethod
3018    public final void setHint(int resid) {
3019        setHint(getContext().getResources().getText(resid));
3020    }
3021
3022    /**
3023     * Returns the hint that is displayed when the text of the TextView
3024     * is empty.
3025     *
3026     * @attr ref android.R.styleable#TextView_hint
3027     */
3028    @ViewDebug.CapturedViewProperty
3029    public CharSequence getHint() {
3030        return mHint;
3031    }
3032
3033    private boolean isMultilineInputType(int type) {
3034        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3035            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3036    }
3037
3038    /**
3039     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3040     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3041     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3042     * then a soft keyboard will not be displayed for this text view.
3043     *
3044     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3045     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3046     * type.
3047     *
3048     * @see #getInputType()
3049     * @see #setRawInputType(int)
3050     * @see android.text.InputType
3051     * @attr ref android.R.styleable#TextView_inputType
3052     */
3053    public void setInputType(int type) {
3054        final boolean wasPassword = isPasswordInputType(mInputType);
3055        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3056        setInputType(type, false);
3057        final boolean isPassword = isPasswordInputType(type);
3058        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3059        boolean forceUpdate = false;
3060        if (isPassword) {
3061            setTransformationMethod(PasswordTransformationMethod.getInstance());
3062            setTypefaceByIndex(MONOSPACE, 0);
3063        } else if (isVisiblePassword) {
3064            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3065                forceUpdate = true;
3066            }
3067            setTypefaceByIndex(MONOSPACE, 0);
3068        } else if (wasPassword || wasVisiblePassword) {
3069            // not in password mode, clean up typeface and transformation
3070            setTypefaceByIndex(-1, -1);
3071            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3072                forceUpdate = true;
3073            }
3074        }
3075
3076        boolean singleLine = !isMultilineInputType(type);
3077
3078        // We need to update the single line mode if it has changed or we
3079        // were previously in password mode.
3080        if (mSingleLine != singleLine || forceUpdate) {
3081            // Change single line mode, but only change the transformation if
3082            // we are not in password mode.
3083            applySingleLine(singleLine, !isPassword, true);
3084        }
3085
3086        InputMethodManager imm = InputMethodManager.peekInstance();
3087        if (imm != null) imm.restartInput(this);
3088    }
3089
3090    /**
3091     * It would be better to rely on the input type for everything. A password inputType should have
3092     * a password transformation. We should hence use isPasswordInputType instead of this method.
3093     *
3094     * We should:
3095     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3096     * would install the correct transformation).
3097     * - Refuse the installation of a non-password transformation in setTransformation if the input
3098     * type is password.
3099     *
3100     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3101     * is useful since it matches what the user can see (obfuscated text or not).
3102     *
3103     * @return true if the current transformation method is of the password type.
3104     */
3105    private boolean hasPasswordTransformationMethod() {
3106        return mTransformation instanceof PasswordTransformationMethod;
3107    }
3108
3109    private boolean isPasswordInputType(int inputType) {
3110        final int variation =
3111                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3112        return variation
3113                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3114                || variation
3115                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3116                || variation
3117                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3118    }
3119
3120    private boolean isVisiblePasswordInputType(int inputType) {
3121        final int variation =
3122                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3123        return variation
3124                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3125    }
3126
3127    /**
3128     * Directly change the content type integer of the text view, without
3129     * modifying any other state.
3130     * @see #setInputType(int)
3131     * @see android.text.InputType
3132     * @attr ref android.R.styleable#TextView_inputType
3133     */
3134    public void setRawInputType(int type) {
3135        mInputType = type;
3136    }
3137
3138    private void setInputType(int type, boolean direct) {
3139        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3140        KeyListener input;
3141        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3142            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3143            TextKeyListener.Capitalize cap;
3144            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3145                cap = TextKeyListener.Capitalize.CHARACTERS;
3146            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3147                cap = TextKeyListener.Capitalize.WORDS;
3148            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3149                cap = TextKeyListener.Capitalize.SENTENCES;
3150            } else {
3151                cap = TextKeyListener.Capitalize.NONE;
3152            }
3153            input = TextKeyListener.getInstance(autotext, cap);
3154        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3155            input = DigitsKeyListener.getInstance(
3156                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3157                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3158        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3159            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3160                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3161                    input = DateKeyListener.getInstance();
3162                    break;
3163                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3164                    input = TimeKeyListener.getInstance();
3165                    break;
3166                default:
3167                    input = DateTimeKeyListener.getInstance();
3168                    break;
3169            }
3170        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3171            input = DialerKeyListener.getInstance();
3172        } else {
3173            input = TextKeyListener.getInstance();
3174        }
3175        setRawInputType(type);
3176        if (direct) mInput = input;
3177        else {
3178            setKeyListenerOnly(input);
3179        }
3180    }
3181
3182    /**
3183     * Get the type of the content.
3184     *
3185     * @see #setInputType(int)
3186     * @see android.text.InputType
3187     */
3188    public int getInputType() {
3189        return mInputType;
3190    }
3191
3192    /**
3193     * Change the editor type integer associated with the text view, which
3194     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3195     * has focus.
3196     * @see #getImeOptions
3197     * @see android.view.inputmethod.EditorInfo
3198     * @attr ref android.R.styleable#TextView_imeOptions
3199     */
3200    public void setImeOptions(int imeOptions) {
3201        if (mInputContentType == null) {
3202            mInputContentType = new InputContentType();
3203        }
3204        mInputContentType.imeOptions = imeOptions;
3205    }
3206
3207    /**
3208     * Get the type of the IME editor.
3209     *
3210     * @see #setImeOptions(int)
3211     * @see android.view.inputmethod.EditorInfo
3212     */
3213    public int getImeOptions() {
3214        return mInputContentType != null
3215                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3216    }
3217
3218    /**
3219     * Change the custom IME action associated with the text view, which
3220     * will be reported to an IME with {@link EditorInfo#actionLabel}
3221     * and {@link EditorInfo#actionId} when it has focus.
3222     * @see #getImeActionLabel
3223     * @see #getImeActionId
3224     * @see android.view.inputmethod.EditorInfo
3225     * @attr ref android.R.styleable#TextView_imeActionLabel
3226     * @attr ref android.R.styleable#TextView_imeActionId
3227     */
3228    public void setImeActionLabel(CharSequence label, int actionId) {
3229        if (mInputContentType == null) {
3230            mInputContentType = new InputContentType();
3231        }
3232        mInputContentType.imeActionLabel = label;
3233        mInputContentType.imeActionId = actionId;
3234    }
3235
3236    /**
3237     * Get the IME action label previous set with {@link #setImeActionLabel}.
3238     *
3239     * @see #setImeActionLabel
3240     * @see android.view.inputmethod.EditorInfo
3241     */
3242    public CharSequence getImeActionLabel() {
3243        return mInputContentType != null
3244                ? mInputContentType.imeActionLabel : null;
3245    }
3246
3247    /**
3248     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3249     *
3250     * @see #setImeActionLabel
3251     * @see android.view.inputmethod.EditorInfo
3252     */
3253    public int getImeActionId() {
3254        return mInputContentType != null
3255                ? mInputContentType.imeActionId : 0;
3256    }
3257
3258    /**
3259     * Set a special listener to be called when an action is performed
3260     * on the text view.  This will be called when the enter key is pressed,
3261     * or when an action supplied to the IME is selected by the user.  Setting
3262     * this means that the normal hard key event will not insert a newline
3263     * into the text view, even if it is multi-line; holding down the ALT
3264     * modifier will, however, allow the user to insert a newline character.
3265     */
3266    public void setOnEditorActionListener(OnEditorActionListener l) {
3267        if (mInputContentType == null) {
3268            mInputContentType = new InputContentType();
3269        }
3270        mInputContentType.onEditorActionListener = l;
3271    }
3272
3273    /**
3274     * Called when an attached input method calls
3275     * {@link InputConnection#performEditorAction(int)
3276     * InputConnection.performEditorAction()}
3277     * for this text view.  The default implementation will call your action
3278     * listener supplied to {@link #setOnEditorActionListener}, or perform
3279     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3280     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3281     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3282     * EditorInfo.IME_ACTION_DONE}.
3283     *
3284     * <p>For backwards compatibility, if no IME options have been set and the
3285     * text view would not normally advance focus on enter, then
3286     * the NEXT and DONE actions received here will be turned into an enter
3287     * key down/up pair to go through the normal key handling.
3288     *
3289     * @param actionCode The code of the action being performed.
3290     *
3291     * @see #setOnEditorActionListener
3292     */
3293    public void onEditorAction(int actionCode) {
3294        final InputContentType ict = mInputContentType;
3295        if (ict != null) {
3296            if (ict.onEditorActionListener != null) {
3297                if (ict.onEditorActionListener.onEditorAction(this,
3298                        actionCode, null)) {
3299                    return;
3300                }
3301            }
3302
3303            // This is the handling for some default action.
3304            // Note that for backwards compatibility we don't do this
3305            // default handling if explicit ime options have not been given,
3306            // instead turning this into the normal enter key codes that an
3307            // app may be expecting.
3308            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3309                View v = focusSearch(FOCUS_DOWN);
3310                if (v != null) {
3311                    if (!v.requestFocus(FOCUS_DOWN)) {
3312                        throw new IllegalStateException("focus search returned a view " +
3313                                "that wasn't able to take focus!");
3314                    }
3315                }
3316                return;
3317
3318            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3319                View v = focusSearch(FOCUS_UP);
3320                if (v != null) {
3321                    if (!v.requestFocus(FOCUS_UP)) {
3322                        throw new IllegalStateException("focus search returned a view " +
3323                                "that wasn't able to take focus!");
3324                    }
3325                }
3326                return;
3327
3328            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3329                InputMethodManager imm = InputMethodManager.peekInstance();
3330                if (imm != null && imm.isActive(this)) {
3331                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3332                }
3333                return;
3334            }
3335        }
3336
3337        Handler h = getHandler();
3338        if (h != null) {
3339            long eventTime = SystemClock.uptimeMillis();
3340            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3341                    new KeyEvent(eventTime, eventTime,
3342                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3343                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3344                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3345                    | KeyEvent.FLAG_EDITOR_ACTION)));
3346            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3347                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3348                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3349                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3350                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3351                    | KeyEvent.FLAG_EDITOR_ACTION)));
3352        }
3353    }
3354
3355    /**
3356     * Set the private content type of the text, which is the
3357     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3358     * field that will be filled in when creating an input connection.
3359     *
3360     * @see #getPrivateImeOptions()
3361     * @see EditorInfo#privateImeOptions
3362     * @attr ref android.R.styleable#TextView_privateImeOptions
3363     */
3364    public void setPrivateImeOptions(String type) {
3365        if (mInputContentType == null) mInputContentType = new InputContentType();
3366        mInputContentType.privateImeOptions = type;
3367    }
3368
3369    /**
3370     * Get the private type of the content.
3371     *
3372     * @see #setPrivateImeOptions(String)
3373     * @see EditorInfo#privateImeOptions
3374     */
3375    public String getPrivateImeOptions() {
3376        return mInputContentType != null
3377                ? mInputContentType.privateImeOptions : null;
3378    }
3379
3380    /**
3381     * Set the extra input data of the text, which is the
3382     * {@link EditorInfo#extras TextBoxAttribute.extras}
3383     * Bundle that will be filled in when creating an input connection.  The
3384     * given integer is the resource ID of an XML resource holding an
3385     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3386     *
3387     * @see #getInputExtras(boolean)
3388     * @see EditorInfo#extras
3389     * @attr ref android.R.styleable#TextView_editorExtras
3390     */
3391    public void setInputExtras(int xmlResId)
3392            throws XmlPullParserException, IOException {
3393        XmlResourceParser parser = getResources().getXml(xmlResId);
3394        if (mInputContentType == null) mInputContentType = new InputContentType();
3395        mInputContentType.extras = new Bundle();
3396        getResources().parseBundleExtras(parser, mInputContentType.extras);
3397    }
3398
3399    /**
3400     * Retrieve the input extras currently associated with the text view, which
3401     * can be viewed as well as modified.
3402     *
3403     * @param create If true, the extras will be created if they don't already
3404     * exist.  Otherwise, null will be returned if none have been created.
3405     * @see #setInputExtras(int)
3406     * @see EditorInfo#extras
3407     * @attr ref android.R.styleable#TextView_editorExtras
3408     */
3409    public Bundle getInputExtras(boolean create) {
3410        if (mInputContentType == null) {
3411            if (!create) return null;
3412            mInputContentType = new InputContentType();
3413        }
3414        if (mInputContentType.extras == null) {
3415            if (!create) return null;
3416            mInputContentType.extras = new Bundle();
3417        }
3418        return mInputContentType.extras;
3419    }
3420
3421    /**
3422     * Returns the error message that was set to be displayed with
3423     * {@link #setError}, or <code>null</code> if no error was set
3424     * or if it the error was cleared by the widget after user input.
3425     */
3426    public CharSequence getError() {
3427        return mError;
3428    }
3429
3430    /**
3431     * Sets the right-hand compound drawable of the TextView to the "error"
3432     * icon and sets an error message that will be displayed in a popup when
3433     * the TextView has focus.  The icon and error message will be reset to
3434     * null when any key events cause changes to the TextView's text.  If the
3435     * <code>error</code> is <code>null</code>, the error message and icon
3436     * will be cleared.
3437     */
3438    @android.view.RemotableViewMethod
3439    public void setError(CharSequence error) {
3440        if (error == null) {
3441            setError(null, null);
3442        } else {
3443            Drawable dr = getContext().getResources().
3444                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3445
3446            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3447            setError(error, dr);
3448        }
3449    }
3450
3451    /**
3452     * Sets the right-hand compound drawable of the TextView to the specified
3453     * icon and sets an error message that will be displayed in a popup when
3454     * the TextView has focus.  The icon and error message will be reset to
3455     * null when any key events cause changes to the TextView's text.  The
3456     * drawable must already have had {@link Drawable#setBounds} set on it.
3457     * If the <code>error</code> is <code>null</code>, the error message will
3458     * be cleared (and you should provide a <code>null</code> icon as well).
3459     */
3460    public void setError(CharSequence error, Drawable icon) {
3461        error = TextUtils.stringOrSpannedString(error);
3462
3463        mError = error;
3464        mErrorWasChanged = true;
3465        final Drawables dr = mDrawables;
3466        if (dr != null) {
3467            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon, dr.mDrawableBottom);
3468        } else {
3469            setCompoundDrawables(null, null, icon, null);
3470        }
3471
3472        if (error == null) {
3473            if (mPopup != null) {
3474                if (mPopup.isShowing()) {
3475                    mPopup.dismiss();
3476                }
3477
3478                mPopup = null;
3479            }
3480        } else {
3481            if (isFocused()) {
3482                showError();
3483            }
3484        }
3485    }
3486
3487    private void showError() {
3488        if (getWindowToken() == null) {
3489            mShowErrorAfterAttach = true;
3490            return;
3491        }
3492
3493        if (mPopup == null) {
3494            LayoutInflater inflater = LayoutInflater.from(getContext());
3495            final TextView err = (TextView) inflater.inflate(
3496                    com.android.internal.R.layout.textview_hint, null);
3497
3498            final float scale = getResources().getDisplayMetrics().density;
3499            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3500            mPopup.setFocusable(false);
3501            // The user is entering text, so the input method is needed.  We
3502            // don't want the popup to be displayed on top of it.
3503            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3504        }
3505
3506        TextView tv = (TextView) mPopup.getContentView();
3507        chooseSize(mPopup, mError, tv);
3508        tv.setText(mError);
3509
3510        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3511        mPopup.fixDirection(mPopup.isAboveAnchor());
3512    }
3513
3514    private static class ErrorPopup extends PopupWindow {
3515        private boolean mAbove = false;
3516        private final TextView mView;
3517        private int mPopupInlineErrorBackgroundId = 0;
3518        private int mPopupInlineErrorAboveBackgroundId = 0;
3519
3520        ErrorPopup(TextView v, int width, int height) {
3521            super(v, width, height);
3522            mView = v;
3523            // Make sure the TextView has a background set as it will be used the first time it is
3524            // shown and positionned. Initialized with below background, which should have
3525            // dimensions identical to the above version for this to work (and is more likely).
3526            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3527                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3528            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3529        }
3530
3531        void fixDirection(boolean above) {
3532            mAbove = above;
3533
3534            if (above) {
3535                mPopupInlineErrorAboveBackgroundId =
3536                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3537                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3538            } else {
3539                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3540                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3541            }
3542
3543            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3544                mPopupInlineErrorBackgroundId);
3545        }
3546
3547        private int getResourceId(int currentId, int index) {
3548            if (currentId == 0) {
3549                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3550                        R.styleable.Theme);
3551                currentId = styledAttributes.getResourceId(index, 0);
3552                styledAttributes.recycle();
3553            }
3554            return currentId;
3555        }
3556
3557        @Override
3558        public void update(int x, int y, int w, int h, boolean force) {
3559            super.update(x, y, w, h, force);
3560
3561            boolean above = isAboveAnchor();
3562            if (above != mAbove) {
3563                fixDirection(above);
3564            }
3565        }
3566    }
3567
3568    /**
3569     * Returns the Y offset to make the pointy top of the error point
3570     * at the middle of the error icon.
3571     */
3572    private int getErrorX() {
3573        /*
3574         * The "25" is the distance between the point and the right edge
3575         * of the background
3576         */
3577        final float scale = getResources().getDisplayMetrics().density;
3578
3579        final Drawables dr = mDrawables;
3580        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3581                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3582    }
3583
3584    /**
3585     * Returns the Y offset to make the pointy top of the error point
3586     * at the bottom of the error icon.
3587     */
3588    private int getErrorY() {
3589        /*
3590         * Compound, not extended, because the icon is not clipped
3591         * if the text height is smaller.
3592         */
3593        final int compoundPaddingTop = getCompoundPaddingTop();
3594        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3595
3596        final Drawables dr = mDrawables;
3597        int icontop = compoundPaddingTop +
3598                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3599
3600        /*
3601         * The "2" is the distance between the point and the top edge
3602         * of the background.
3603         */
3604        final float scale = getResources().getDisplayMetrics().density;
3605        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
3606                (int) (2 * scale + 0.5f);
3607    }
3608
3609    private void hideError() {
3610        if (mPopup != null) {
3611            if (mPopup.isShowing()) {
3612                mPopup.dismiss();
3613            }
3614        }
3615
3616        mShowErrorAfterAttach = false;
3617    }
3618
3619    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3620        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3621        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3622
3623        /*
3624         * Figure out how big the text would be if we laid it out to the
3625         * full width of this view minus the border.
3626         */
3627        int cap = getWidth() - wid;
3628        if (cap < 0) {
3629            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3630        }
3631
3632        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3633                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3634        float max = 0;
3635        for (int i = 0; i < l.getLineCount(); i++) {
3636            max = Math.max(max, l.getLineWidth(i));
3637        }
3638
3639        /*
3640         * Now set the popup size to be big enough for the text plus the border.
3641         */
3642        pop.setWidth(wid + (int) Math.ceil(max));
3643        pop.setHeight(ht + l.getHeight());
3644    }
3645
3646
3647    @Override
3648    protected boolean setFrame(int l, int t, int r, int b) {
3649        boolean result = super.setFrame(l, t, r, b);
3650
3651        if (mPopup != null) {
3652            TextView tv = (TextView) mPopup.getContentView();
3653            chooseSize(mPopup, mError, tv);
3654            mPopup.update(this, getErrorX(), getErrorY(),
3655                          mPopup.getWidth(), mPopup.getHeight());
3656        }
3657
3658        restartMarqueeIfNeeded();
3659
3660        return result;
3661    }
3662
3663    private void restartMarqueeIfNeeded() {
3664        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3665            mRestartMarquee = false;
3666            startMarquee();
3667        }
3668    }
3669
3670    /**
3671     * Sets the list of input filters that will be used if the buffer is
3672     * Editable.  Has no effect otherwise.
3673     *
3674     * @attr ref android.R.styleable#TextView_maxLength
3675     */
3676    public void setFilters(InputFilter[] filters) {
3677        if (filters == null) {
3678            throw new IllegalArgumentException();
3679        }
3680
3681        mFilters = filters;
3682
3683        if (mText instanceof Editable) {
3684            setFilters((Editable) mText, filters);
3685        }
3686    }
3687
3688    /**
3689     * Sets the list of input filters on the specified Editable,
3690     * and includes mInput in the list if it is an InputFilter.
3691     */
3692    private void setFilters(Editable e, InputFilter[] filters) {
3693        if (mInput instanceof InputFilter) {
3694            InputFilter[] nf = new InputFilter[filters.length + 1];
3695
3696            System.arraycopy(filters, 0, nf, 0, filters.length);
3697            nf[filters.length] = (InputFilter) mInput;
3698
3699            e.setFilters(nf);
3700        } else {
3701            e.setFilters(filters);
3702        }
3703    }
3704
3705    /**
3706     * Returns the current list of input filters.
3707     */
3708    public InputFilter[] getFilters() {
3709        return mFilters;
3710    }
3711
3712    /////////////////////////////////////////////////////////////////////////
3713
3714    private int getVerticalOffset(boolean forceNormal) {
3715        int voffset = 0;
3716        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3717
3718        Layout l = mLayout;
3719        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3720            l = mHintLayout;
3721        }
3722
3723        if (gravity != Gravity.TOP) {
3724            int boxht;
3725
3726            if (l == mHintLayout) {
3727                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3728                        getCompoundPaddingBottom();
3729            } else {
3730                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3731                        getExtendedPaddingBottom();
3732            }
3733            int textht = l.getHeight();
3734
3735            if (textht < boxht) {
3736                if (gravity == Gravity.BOTTOM)
3737                    voffset = boxht - textht;
3738                else // (gravity == Gravity.CENTER_VERTICAL)
3739                    voffset = (boxht - textht) >> 1;
3740            }
3741        }
3742        return voffset;
3743    }
3744
3745    private int getBottomVerticalOffset(boolean forceNormal) {
3746        int voffset = 0;
3747        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3748
3749        Layout l = mLayout;
3750        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3751            l = mHintLayout;
3752        }
3753
3754        if (gravity != Gravity.BOTTOM) {
3755            int boxht;
3756
3757            if (l == mHintLayout) {
3758                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3759                        getCompoundPaddingBottom();
3760            } else {
3761                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3762                        getExtendedPaddingBottom();
3763            }
3764            int textht = l.getHeight();
3765
3766            if (textht < boxht) {
3767                if (gravity == Gravity.TOP)
3768                    voffset = boxht - textht;
3769                else // (gravity == Gravity.CENTER_VERTICAL)
3770                    voffset = (boxht - textht) >> 1;
3771            }
3772        }
3773        return voffset;
3774    }
3775
3776    private void invalidateCursorPath() {
3777        if (mHighlightPathBogus) {
3778            invalidateCursor();
3779        } else {
3780            final int horizontalPadding = getCompoundPaddingLeft();
3781            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
3782
3783            if (mCursorCount == 0) {
3784                synchronized (sTempRect) {
3785                    /*
3786                     * The reason for this concern about the thickness of the
3787                     * cursor and doing the floor/ceil on the coordinates is that
3788                     * some EditTexts (notably textfields in the Browser) have
3789                     * anti-aliased text where not all the characters are
3790                     * necessarily at integer-multiple locations.  This should
3791                     * make sure the entire cursor gets invalidated instead of
3792                     * sometimes missing half a pixel.
3793                     */
3794                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3795                    if (thick < 1.0f) {
3796                        thick = 1.0f;
3797                    }
3798
3799                    thick /= 2.0f;
3800
3801                    mHighlightPath.computeBounds(sTempRect, false);
3802
3803                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
3804                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
3805                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
3806                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
3807                }
3808            } else {
3809                for (int i = 0; i < mCursorCount; i++) {
3810                    Rect bounds = mCursorDrawable[i].getBounds();
3811                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
3812                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
3813                }
3814            }
3815        }
3816    }
3817
3818    private void invalidateCursor() {
3819        int where = getSelectionEnd();
3820
3821        invalidateCursor(where, where, where);
3822    }
3823
3824    private void invalidateCursor(int a, int b, int c) {
3825        if (mLayout == null) {
3826            invalidate();
3827        } else {
3828            if (a >= 0 || b >= 0 || c >= 0) {
3829                int first = Math.min(Math.min(a, b), c);
3830                int last = Math.max(Math.max(a, b), c);
3831
3832                int line = mLayout.getLineForOffset(first);
3833                int top = mLayout.getLineTop(line);
3834
3835                // This is ridiculous, but the descent from the line above
3836                // can hang down into the line we really want to redraw,
3837                // so we have to invalidate part of the line above to make
3838                // sure everything that needs to be redrawn really is.
3839                // (But not the whole line above, because that would cause
3840                // the same problem with the descenders on the line above it!)
3841                if (line > 0) {
3842                    top -= mLayout.getLineDescent(line - 1);
3843                }
3844
3845                int line2;
3846
3847                if (first == last)
3848                    line2 = line;
3849                else
3850                    line2 = mLayout.getLineForOffset(last);
3851
3852                int bottom = mLayout.getLineTop(line2 + 1);
3853
3854                final int horizontalPadding = getCompoundPaddingLeft();
3855                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
3856
3857                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
3858                // the invalidated lines specified above.
3859                for (int i = 0; i < mCursorCount; i++) {
3860                    Rect bounds = mCursorDrawable[i].getBounds();
3861                    top = Math.min(top, bounds.top);
3862                    bottom = Math.max(bottom, bounds.bottom);
3863                    // Horizontal bounds are already full width, no need to update
3864                }
3865
3866                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
3867                        horizontalPadding + mScrollX + getWidth() -
3868                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
3869                        bottom + verticalPadding);
3870            }
3871        }
3872    }
3873
3874    private void registerForPreDraw() {
3875        final ViewTreeObserver observer = getViewTreeObserver();
3876
3877        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3878            observer.addOnPreDrawListener(this);
3879            mPreDrawState = PREDRAW_PENDING;
3880        } else if (mPreDrawState == PREDRAW_DONE) {
3881            mPreDrawState = PREDRAW_PENDING;
3882        }
3883
3884        // else state is PREDRAW_PENDING, so keep waiting.
3885    }
3886
3887    /**
3888     * {@inheritDoc}
3889     */
3890    public boolean onPreDraw() {
3891        if (mPreDrawState != PREDRAW_PENDING) {
3892            return true;
3893        }
3894
3895        if (mLayout == null) {
3896            assumeLayout();
3897        }
3898
3899        boolean changed = false;
3900
3901        if (mMovement != null) {
3902            /* This code also provides auto-scrolling when a cursor is moved using a
3903             * CursorController (insertion point or selection limits).
3904             * For selection, ensure start or end is visible depending on controller's state.
3905             */
3906            int curs = getSelectionEnd();
3907            // Do not create the controller if it is not already created.
3908            if (mSelectionModifierCursorController != null &&
3909                    mSelectionModifierCursorController.isSelectionStartDragged()) {
3910                curs = getSelectionStart();
3911            }
3912
3913            /*
3914             * TODO: This should really only keep the end in view if
3915             * it already was before the text changed.  I'm not sure
3916             * of a good way to tell from here if it was.
3917             */
3918            if (curs < 0 &&
3919                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3920                curs = mText.length();
3921            }
3922
3923            if (curs >= 0) {
3924                changed = bringPointIntoView(curs);
3925            }
3926        } else {
3927            changed = bringTextIntoView();
3928        }
3929
3930        // This has to be checked here since:
3931        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3932        //   a screen rotation) since layout is not yet initialized at that point.
3933        if (mCreatedWithASelection) {
3934            startSelectionActionMode();
3935            mCreatedWithASelection = false;
3936        }
3937
3938        // Phone specific code (there is no ExtractEditText on tablets).
3939        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
3940        // not be set. Do the test here instead.
3941        if (this instanceof ExtractEditText && hasSelection()) {
3942            startSelectionActionMode();
3943        }
3944
3945        mPreDrawState = PREDRAW_DONE;
3946        return !changed;
3947    }
3948
3949    @Override
3950    protected void onAttachedToWindow() {
3951        super.onAttachedToWindow();
3952
3953        mTemporaryDetach = false;
3954
3955        if (mShowErrorAfterAttach) {
3956            showError();
3957            mShowErrorAfterAttach = false;
3958        }
3959
3960        final ViewTreeObserver observer = getViewTreeObserver();
3961        // No need to create the controller.
3962        // The get method will add the listener on controller creation.
3963        if (mInsertionPointCursorController != null) {
3964            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3965        }
3966        if (mSelectionModifierCursorController != null) {
3967            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3968        }
3969    }
3970
3971    @Override
3972    protected void onDetachedFromWindow() {
3973        super.onDetachedFromWindow();
3974
3975        final ViewTreeObserver observer = getViewTreeObserver();
3976        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3977            observer.removeOnPreDrawListener(this);
3978            mPreDrawState = PREDRAW_NOT_REGISTERED;
3979        }
3980        // No need to create the controller, as getXXController would.
3981        if (mInsertionPointCursorController != null) {
3982            observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3983        }
3984        if (mSelectionModifierCursorController != null) {
3985            observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3986        }
3987
3988        if (mError != null) {
3989            hideError();
3990        }
3991
3992        if (mBlink != null) {
3993            mBlink.removeCallbacks(mBlink);
3994        }
3995
3996        if (mInsertionPointCursorController != null) {
3997            mInsertionPointCursorController.onDetached();
3998        }
3999
4000        if (mSelectionModifierCursorController != null) {
4001            mSelectionModifierCursorController.onDetached();
4002        }
4003
4004        hideControllers();
4005    }
4006
4007    @Override
4008    protected boolean isPaddingOffsetRequired() {
4009        return mShadowRadius != 0 || mDrawables != null;
4010    }
4011
4012    @Override
4013    protected int getLeftPaddingOffset() {
4014        return getCompoundPaddingLeft() - mPaddingLeft +
4015                (int) Math.min(0, mShadowDx - mShadowRadius);
4016    }
4017
4018    @Override
4019    protected int getTopPaddingOffset() {
4020        return (int) Math.min(0, mShadowDy - mShadowRadius);
4021    }
4022
4023    @Override
4024    protected int getBottomPaddingOffset() {
4025        return (int) Math.max(0, mShadowDy + mShadowRadius);
4026    }
4027
4028    @Override
4029    protected int getRightPaddingOffset() {
4030        return -(getCompoundPaddingRight() - mPaddingRight) +
4031                (int) Math.max(0, mShadowDx + mShadowRadius);
4032    }
4033
4034    @Override
4035    protected boolean verifyDrawable(Drawable who) {
4036        final boolean verified = super.verifyDrawable(who);
4037        if (!verified && mDrawables != null) {
4038            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4039                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
4040        }
4041        return verified;
4042    }
4043
4044    @Override
4045    public void jumpDrawablesToCurrentState() {
4046        super.jumpDrawablesToCurrentState();
4047        if (mDrawables != null) {
4048            if (mDrawables.mDrawableLeft != null) {
4049                mDrawables.mDrawableLeft.jumpToCurrentState();
4050            }
4051            if (mDrawables.mDrawableTop != null) {
4052                mDrawables.mDrawableTop.jumpToCurrentState();
4053            }
4054            if (mDrawables.mDrawableRight != null) {
4055                mDrawables.mDrawableRight.jumpToCurrentState();
4056            }
4057            if (mDrawables.mDrawableBottom != null) {
4058                mDrawables.mDrawableBottom.jumpToCurrentState();
4059            }
4060        }
4061    }
4062
4063    @Override
4064    public void invalidateDrawable(Drawable drawable) {
4065        if (verifyDrawable(drawable)) {
4066            final Rect dirty = drawable.getBounds();
4067            int scrollX = mScrollX;
4068            int scrollY = mScrollY;
4069
4070            // IMPORTANT: The coordinates below are based on the coordinates computed
4071            // for each compound drawable in onDraw(). Make sure to update each section
4072            // accordingly.
4073            final TextView.Drawables drawables = mDrawables;
4074            if (drawables != null) {
4075                if (drawable == drawables.mDrawableLeft) {
4076                    final int compoundPaddingTop = getCompoundPaddingTop();
4077                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4078                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4079
4080                    scrollX += mPaddingLeft;
4081                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4082                } else if (drawable == drawables.mDrawableRight) {
4083                    final int compoundPaddingTop = getCompoundPaddingTop();
4084                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4085                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4086
4087                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4088                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4089                } else if (drawable == drawables.mDrawableTop) {
4090                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4091                    final int compoundPaddingRight = getCompoundPaddingRight();
4092                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4093
4094                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4095                    scrollY += mPaddingTop;
4096                } else if (drawable == drawables.mDrawableBottom) {
4097                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4098                    final int compoundPaddingRight = getCompoundPaddingRight();
4099                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4100
4101                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4102                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4103                }
4104            }
4105
4106            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4107                    dirty.right + scrollX, dirty.bottom + scrollY);
4108        }
4109    }
4110
4111    @Override
4112    protected boolean onSetAlpha(int alpha) {
4113        // Alpha is supported if and only if the drawing can be done in one pass.
4114        // TODO text with spans with a background color currently do not respect this alpha.
4115        if (getBackground() == null) {
4116            mCurrentAlpha = alpha;
4117            final Drawables dr = mDrawables;
4118            if (dr != null) {
4119                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4120                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4121                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4122                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4123            }
4124            return true;
4125        }
4126
4127        mCurrentAlpha = 255;
4128        return false;
4129    }
4130
4131    /**
4132     * When a TextView is used to display a useful piece of information to the user (such as a
4133     * contact's address), it should be made selectable, so that the user can select and copy this
4134     * content.
4135     *
4136     * Use {@link #setTextIsSelectable(boolean)} or the
4137     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4138     * selectable (text is not selectable by default).
4139     *
4140     * Note that the content of an EditText is always selectable.
4141     *
4142     * @return True if the text displayed in this TextView can be selected by the user.
4143     *
4144     * @attr ref android.R.styleable#TextView_textIsSelectable
4145     */
4146    public boolean isTextSelectable() {
4147        return mTextIsSelectable;
4148    }
4149
4150    /**
4151     * Sets whether or not (default) the content of this view is selectable by the user.
4152     *
4153     * Note that this methods affect the {@link #setFocusable(boolean)},
4154     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4155     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4156     * customized.
4157     *
4158     * See {@link #isTextSelectable} for details.
4159     *
4160     * @param selectable Whether or not the content of this TextView should be selectable.
4161     */
4162    public void setTextIsSelectable(boolean selectable) {
4163        if (mTextIsSelectable == selectable) return;
4164
4165        mTextIsSelectable = selectable;
4166
4167        setFocusableInTouchMode(selectable);
4168        setFocusable(selectable);
4169        setClickable(selectable);
4170        setLongClickable(selectable);
4171
4172        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4173
4174        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4175        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4176
4177        // Called by setText above, but safer in case of future code changes
4178        prepareCursorControllers();
4179    }
4180
4181    @Override
4182    protected int[] onCreateDrawableState(int extraSpace) {
4183        final int[] drawableState;
4184
4185        if (mSingleLine) {
4186            drawableState = super.onCreateDrawableState(extraSpace);
4187        } else {
4188            drawableState = super.onCreateDrawableState(extraSpace + 1);
4189            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4190        }
4191
4192        if (mTextIsSelectable) {
4193            // Disable pressed state, which was introduced when TextView was made clickable.
4194            // Prevents text color change.
4195            // setClickable(false) would have a similar effect, but it also disables focus changes
4196            // and long press actions, which are both needed by text selection.
4197            final int length = drawableState.length;
4198            for (int i = 0; i < length; i++) {
4199                if (drawableState[i] == R.attr.state_pressed) {
4200                    final int[] nonPressedState = new int[length - 1];
4201                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4202                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4203                    return nonPressedState;
4204                }
4205            }
4206        }
4207
4208        return drawableState;
4209    }
4210
4211    @Override
4212    protected void onDraw(Canvas canvas) {
4213        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4214
4215        restartMarqueeIfNeeded();
4216
4217        // Draw the background for this view
4218        super.onDraw(canvas);
4219
4220        final int compoundPaddingLeft = getCompoundPaddingLeft();
4221        final int compoundPaddingTop = getCompoundPaddingTop();
4222        final int compoundPaddingRight = getCompoundPaddingRight();
4223        final int compoundPaddingBottom = getCompoundPaddingBottom();
4224        final int scrollX = mScrollX;
4225        final int scrollY = mScrollY;
4226        final int right = mRight;
4227        final int left = mLeft;
4228        final int bottom = mBottom;
4229        final int top = mTop;
4230
4231        final Drawables dr = mDrawables;
4232        if (dr != null) {
4233            /*
4234             * Compound, not extended, because the icon is not clipped
4235             * if the text height is smaller.
4236             */
4237
4238            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4239            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4240
4241            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4242            // Make sure to update invalidateDrawable() when changing this code.
4243            if (dr.mDrawableLeft != null) {
4244                canvas.save();
4245                canvas.translate(scrollX + mPaddingLeft,
4246                                 scrollY + compoundPaddingTop +
4247                                 (vspace - dr.mDrawableHeightLeft) / 2);
4248                dr.mDrawableLeft.draw(canvas);
4249                canvas.restore();
4250            }
4251
4252            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4253            // Make sure to update invalidateDrawable() when changing this code.
4254            if (dr.mDrawableRight != null) {
4255                canvas.save();
4256                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4257                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4258                dr.mDrawableRight.draw(canvas);
4259                canvas.restore();
4260            }
4261
4262            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4263            // Make sure to update invalidateDrawable() when changing this code.
4264            if (dr.mDrawableTop != null) {
4265                canvas.save();
4266                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4267                        scrollY + mPaddingTop);
4268                dr.mDrawableTop.draw(canvas);
4269                canvas.restore();
4270            }
4271
4272            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4273            // Make sure to update invalidateDrawable() when changing this code.
4274            if (dr.mDrawableBottom != null) {
4275                canvas.save();
4276                canvas.translate(scrollX + compoundPaddingLeft +
4277                        (hspace - dr.mDrawableWidthBottom) / 2,
4278                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4279                dr.mDrawableBottom.draw(canvas);
4280                canvas.restore();
4281            }
4282        }
4283
4284        if (mPreDrawState == PREDRAW_DONE) {
4285            final ViewTreeObserver observer = getViewTreeObserver();
4286            observer.removeOnPreDrawListener(this);
4287            mPreDrawState = PREDRAW_NOT_REGISTERED;
4288        }
4289
4290        int color = mCurTextColor;
4291
4292        if (mLayout == null) {
4293            assumeLayout();
4294        }
4295
4296        Layout layout = mLayout;
4297        int cursorcolor = color;
4298
4299        if (mHint != null && mText.length() == 0) {
4300            if (mHintTextColor != null) {
4301                color = mCurHintTextColor;
4302            }
4303
4304            layout = mHintLayout;
4305        }
4306
4307        mTextPaint.setColor(color);
4308        if (mCurrentAlpha != 255) {
4309            // If set, the alpha will override the color's alpha. Multiply the alphas.
4310            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4311        }
4312        mTextPaint.drawableState = getDrawableState();
4313
4314        canvas.save();
4315        /*  Would be faster if we didn't have to do this. Can we chop the
4316            (displayable) text so that we don't need to do this ever?
4317        */
4318
4319        int extendedPaddingTop = getExtendedPaddingTop();
4320        int extendedPaddingBottom = getExtendedPaddingBottom();
4321
4322        float clipLeft = compoundPaddingLeft + scrollX;
4323        float clipTop = extendedPaddingTop + scrollY;
4324        float clipRight = right - left - compoundPaddingRight + scrollX;
4325        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4326
4327        if (mShadowRadius != 0) {
4328            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4329            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4330
4331            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4332            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4333        }
4334
4335        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4336
4337        int voffsetText = 0;
4338        int voffsetCursor = 0;
4339
4340        // translate in by our padding
4341        {
4342            /* shortcircuit calling getVerticaOffset() */
4343            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4344                voffsetText = getVerticalOffset(false);
4345                voffsetCursor = getVerticalOffset(true);
4346            }
4347            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4348        }
4349
4350        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4351            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4352                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4353                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4354                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4355            }
4356
4357            if (mMarquee != null && mMarquee.isRunning()) {
4358                canvas.translate(-mMarquee.mScroll, 0.0f);
4359            }
4360        }
4361
4362        Path highlight = null;
4363        int selStart = -1, selEnd = -1;
4364        boolean drawCursor = false;
4365
4366        //  If there is no movement method, then there can be no selection.
4367        //  Check that first and attempt to skip everything having to do with
4368        //  the cursor.
4369        //  XXX This is not strictly true -- a program could set the
4370        //  selection manually if it really wanted to.
4371        if (mMovement != null && (isFocused() || isPressed())) {
4372            selStart = getSelectionStart();
4373            selEnd = getSelectionEnd();
4374
4375            if ((isCursorVisible() || mTextIsSelectable) && selStart >= 0 && isEnabled()) {
4376                if (mHighlightPath == null)
4377                    mHighlightPath = new Path();
4378
4379                if (selStart == selEnd) {
4380                    if (!mTextIsSelectable &&
4381                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4382                        if (mHighlightPathBogus) {
4383                            mHighlightPath.reset();
4384                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4385                            updateCursorsPositions();
4386                            mHighlightPathBogus = false;
4387                        }
4388
4389                        // XXX should pass to skin instead of drawing directly
4390                        mHighlightPaint.setColor(cursorcolor);
4391                        if (mCurrentAlpha != 255) {
4392                            mHighlightPaint.setAlpha(
4393                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4394                        }
4395                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4396                        highlight = mHighlightPath;
4397                        drawCursor = mCursorCount > 0;
4398                    }
4399                } else {
4400                    if (mHighlightPathBogus) {
4401                        mHighlightPath.reset();
4402                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4403                        mHighlightPathBogus = false;
4404                    }
4405
4406                    // XXX should pass to skin instead of drawing directly
4407                    mHighlightPaint.setColor(mHighlightColor);
4408                    if (mCurrentAlpha != 255) {
4409                        mHighlightPaint.setAlpha(
4410                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4411                    }
4412                    mHighlightPaint.setStyle(Paint.Style.FILL);
4413
4414                    highlight = mHighlightPath;
4415                }
4416            }
4417        }
4418
4419        /*  Comment out until we decide what to do about animations
4420        boolean isLinearTextOn = false;
4421        if (currentTransformation != null) {
4422            isLinearTextOn = mTextPaint.isLinearTextOn();
4423            Matrix m = currentTransformation.getMatrix();
4424            if (!m.isIdentity()) {
4425                // mTextPaint.setLinearTextOn(true);
4426            }
4427        }
4428        */
4429
4430        final InputMethodState ims = mInputMethodState;
4431        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4432        if (ims != null && ims.mBatchEditNesting == 0) {
4433            InputMethodManager imm = InputMethodManager.peekInstance();
4434            if (imm != null) {
4435                if (imm.isActive(this)) {
4436                    boolean reported = false;
4437                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4438                        // We are in extract mode and the content has changed
4439                        // in some way... just report complete new text to the
4440                        // input method.
4441                        reported = reportExtractedText();
4442                    }
4443                    if (!reported && highlight != null) {
4444                        int candStart = -1;
4445                        int candEnd = -1;
4446                        if (mText instanceof Spannable) {
4447                            Spannable sp = (Spannable)mText;
4448                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4449                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4450                        }
4451                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4452                    }
4453                }
4454
4455                if (imm.isWatchingCursor(this) && highlight != null) {
4456                    highlight.computeBounds(ims.mTmpRectF, true);
4457                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4458
4459                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4460                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4461
4462                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4463
4464                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4465                            (int)(ims.mTmpRectF.top + 0.5),
4466                            (int)(ims.mTmpRectF.right + 0.5),
4467                            (int)(ims.mTmpRectF.bottom + 0.5));
4468
4469                    imm.updateCursor(this,
4470                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4471                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4472                }
4473            }
4474        }
4475
4476        if (mCorrectionHighlighter != null) {
4477            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4478        }
4479
4480        if (drawCursor) {
4481            drawCursor(canvas, cursorOffsetVertical);
4482            // Rely on the drawable entirely, do not draw the cursor line.
4483            // Has to be done after the IMM related code above which relies on the highlight.
4484            highlight = null;
4485        }
4486
4487        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4488
4489        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4490            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4491            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4492        }
4493
4494        /*  Comment out until we decide what to do about animations
4495        if (currentTransformation != null) {
4496            mTextPaint.setLinearTextOn(isLinearTextOn);
4497        }
4498        */
4499
4500        canvas.restore();
4501    }
4502
4503    private void updateCursorsPositions() {
4504        if (mCursorDrawableRes == 0) {
4505            mCursorCount = 0;
4506            return;
4507        }
4508
4509        final int offset = getSelectionStart();
4510        final int line = mLayout.getLineForOffset(offset);
4511        final int top = mLayout.getLineTop(line);
4512        final int bottom = mLayout.getLineTop(line + 1);
4513
4514        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4515
4516        int middle = bottom;
4517        if (mCursorCount == 2) {
4518            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4519            middle = (top + bottom) >> 1;
4520        }
4521
4522        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4523
4524        if (mCursorCount == 2) {
4525            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4526        }
4527    }
4528
4529    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4530        if (mCursorDrawable[cursorIndex] == null)
4531            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4532
4533        if (mTempRect == null) mTempRect = new Rect();
4534
4535        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4536        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4537        horizontal = Math.max(0.5f, horizontal - 0.5f);
4538        final int left = (int) (horizontal) - mTempRect.left;
4539        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4540                bottom + mTempRect.bottom);
4541    }
4542
4543    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4544        final boolean translate = cursorOffsetVertical != 0;
4545        if (translate) canvas.translate(0, cursorOffsetVertical);
4546        for (int i = 0; i < mCursorCount; i++) {
4547            mCursorDrawable[i].draw(canvas);
4548        }
4549        if (translate) canvas.translate(0, -cursorOffsetVertical);
4550    }
4551
4552    @Override
4553    public void getFocusedRect(Rect r) {
4554        if (mLayout == null) {
4555            super.getFocusedRect(r);
4556            return;
4557        }
4558
4559        int sel = getSelectionEnd();
4560        if (sel < 0) {
4561            super.getFocusedRect(r);
4562            return;
4563        }
4564
4565        int line = mLayout.getLineForOffset(sel);
4566        r.top = mLayout.getLineTop(line);
4567        r.bottom = mLayout.getLineBottom(line);
4568
4569        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4570        r.right = r.left + 1;
4571
4572        // Adjust for padding and gravity.
4573        int paddingLeft = getCompoundPaddingLeft();
4574        int paddingTop = getExtendedPaddingTop();
4575        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4576            paddingTop += getVerticalOffset(false);
4577        }
4578        r.offset(paddingLeft, paddingTop);
4579    }
4580
4581    /**
4582     * Return the number of lines of text, or 0 if the internal Layout has not
4583     * been built.
4584     */
4585    public int getLineCount() {
4586        return mLayout != null ? mLayout.getLineCount() : 0;
4587    }
4588
4589    /**
4590     * Return the baseline for the specified line (0...getLineCount() - 1)
4591     * If bounds is not null, return the top, left, right, bottom extents
4592     * of the specified line in it. If the internal Layout has not been built,
4593     * return 0 and set bounds to (0, 0, 0, 0)
4594     * @param line which line to examine (0..getLineCount() - 1)
4595     * @param bounds Optional. If not null, it returns the extent of the line
4596     * @return the Y-coordinate of the baseline
4597     */
4598    public int getLineBounds(int line, Rect bounds) {
4599        if (mLayout == null) {
4600            if (bounds != null) {
4601                bounds.set(0, 0, 0, 0);
4602            }
4603            return 0;
4604        }
4605        else {
4606            int baseline = mLayout.getLineBounds(line, bounds);
4607
4608            int voffset = getExtendedPaddingTop();
4609            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4610                voffset += getVerticalOffset(true);
4611            }
4612            if (bounds != null) {
4613                bounds.offset(getCompoundPaddingLeft(), voffset);
4614            }
4615            return baseline + voffset;
4616        }
4617    }
4618
4619    @Override
4620    public int getBaseline() {
4621        if (mLayout == null) {
4622            return super.getBaseline();
4623        }
4624
4625        int voffset = 0;
4626        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4627            voffset = getVerticalOffset(true);
4628        }
4629
4630        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4631    }
4632
4633    @Override
4634    public boolean onKeyDown(int keyCode, KeyEvent event) {
4635        int which = doKeyDown(keyCode, event, null);
4636        if (which == 0) {
4637            // Go through default dispatching.
4638            return super.onKeyDown(keyCode, event);
4639        }
4640
4641        return true;
4642    }
4643
4644    @Override
4645    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4646        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4647
4648        int which = doKeyDown(keyCode, down, event);
4649        if (which == 0) {
4650            // Go through default dispatching.
4651            return super.onKeyMultiple(keyCode, repeatCount, event);
4652        }
4653        if (which == -1) {
4654            // Consumed the whole thing.
4655            return true;
4656        }
4657
4658        repeatCount--;
4659
4660        // We are going to dispatch the remaining events to either the input
4661        // or movement method.  To do this, we will just send a repeated stream
4662        // of down and up events until we have done the complete repeatCount.
4663        // It would be nice if those interfaces had an onKeyMultiple() method,
4664        // but adding that is a more complicated change.
4665        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4666        if (which == 1) {
4667            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4668            while (--repeatCount > 0) {
4669                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4670                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4671            }
4672            hideErrorIfUnchanged();
4673
4674        } else if (which == 2) {
4675            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4676            while (--repeatCount > 0) {
4677                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4678                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4679            }
4680        }
4681
4682        return true;
4683    }
4684
4685    /**
4686     * Returns true if pressing ENTER in this field advances focus instead
4687     * of inserting the character.  This is true mostly in single-line fields,
4688     * but also in mail addresses and subjects which will display on multiple
4689     * lines but where it doesn't make sense to insert newlines.
4690     */
4691    private boolean shouldAdvanceFocusOnEnter() {
4692        if (mInput == null) {
4693            return false;
4694        }
4695
4696        if (mSingleLine) {
4697            return true;
4698        }
4699
4700        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4701            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4702            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4703                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4704                return true;
4705            }
4706        }
4707
4708        return false;
4709    }
4710
4711    /**
4712     * Returns true if pressing TAB in this field advances focus instead
4713     * of inserting the character.  Insert tabs only in multi-line editors.
4714     */
4715    private boolean shouldAdvanceFocusOnTab() {
4716        if (mInput != null && !mSingleLine) {
4717            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4718                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4719                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4720                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4721                    return false;
4722                }
4723            }
4724        }
4725        return true;
4726    }
4727
4728    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4729        if (!isEnabled()) {
4730            return 0;
4731        }
4732
4733        switch (keyCode) {
4734            case KeyEvent.KEYCODE_ENTER:
4735                mEnterKeyIsDown = true;
4736                if (event.hasNoModifiers()) {
4737                    // When mInputContentType is set, we know that we are
4738                    // running in a "modern" cupcake environment, so don't need
4739                    // to worry about the application trying to capture
4740                    // enter key events.
4741                    if (mInputContentType != null) {
4742                        // If there is an action listener, given them a
4743                        // chance to consume the event.
4744                        if (mInputContentType.onEditorActionListener != null &&
4745                                mInputContentType.onEditorActionListener.onEditorAction(
4746                                this, EditorInfo.IME_NULL, event)) {
4747                            mInputContentType.enterDown = true;
4748                            // We are consuming the enter key for them.
4749                            return -1;
4750                        }
4751                    }
4752
4753                    // If our editor should move focus when enter is pressed, or
4754                    // this is a generated event from an IME action button, then
4755                    // don't let it be inserted into the text.
4756                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4757                            || shouldAdvanceFocusOnEnter()) {
4758                        if (mOnClickListener != null) {
4759                            return 0;
4760                        }
4761                        return -1;
4762                    }
4763                }
4764                break;
4765
4766            case KeyEvent.KEYCODE_DPAD_CENTER:
4767                mDPadCenterIsDown = true;
4768                if (event.hasNoModifiers()) {
4769                    if (shouldAdvanceFocusOnEnter()) {
4770                        return 0;
4771                    }
4772                }
4773                break;
4774
4775            case KeyEvent.KEYCODE_TAB:
4776                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
4777                    if (shouldAdvanceFocusOnTab()) {
4778                        return 0;
4779                    }
4780                }
4781                break;
4782
4783                // Has to be done on key down (and not on key up) to correctly be intercepted.
4784            case KeyEvent.KEYCODE_BACK:
4785                if (mSelectionActionMode != null) {
4786                    stopSelectionActionMode();
4787                    return -1;
4788                }
4789                break;
4790        }
4791
4792        if (mInput != null) {
4793            resetErrorChangedFlag();
4794
4795            boolean doDown = true;
4796            if (otherEvent != null) {
4797                try {
4798                    beginBatchEdit();
4799                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
4800                    hideErrorIfUnchanged();
4801                    doDown = false;
4802                    if (handled) {
4803                        return -1;
4804                    }
4805                } catch (AbstractMethodError e) {
4806                    // onKeyOther was added after 1.0, so if it isn't
4807                    // implemented we need to try to dispatch as a regular down.
4808                } finally {
4809                    endBatchEdit();
4810                }
4811            }
4812
4813            if (doDown) {
4814                beginBatchEdit();
4815                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
4816                endBatchEdit();
4817                hideErrorIfUnchanged();
4818                if (handled) return 1;
4819            }
4820        }
4821
4822        // bug 650865: sometimes we get a key event before a layout.
4823        // don't try to move around if we don't know the layout.
4824
4825        if (mMovement != null && mLayout != null) {
4826            boolean doDown = true;
4827            if (otherEvent != null) {
4828                try {
4829                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4830                            otherEvent);
4831                    doDown = false;
4832                    if (handled) {
4833                        return -1;
4834                    }
4835                } catch (AbstractMethodError e) {
4836                    // onKeyOther was added after 1.0, so if it isn't
4837                    // implemented we need to try to dispatch as a regular down.
4838                }
4839            }
4840            if (doDown) {
4841                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4842                    return 2;
4843            }
4844        }
4845
4846        return 0;
4847    }
4848
4849    /**
4850     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
4851     * can be recorded.
4852     * @hide
4853     */
4854    public void resetErrorChangedFlag() {
4855        /*
4856         * Keep track of what the error was before doing the input
4857         * so that if an input filter changed the error, we leave
4858         * that error showing.  Otherwise, we take down whatever
4859         * error was showing when the user types something.
4860         */
4861        mErrorWasChanged = false;
4862    }
4863
4864    /**
4865     * @hide
4866     */
4867    public void hideErrorIfUnchanged() {
4868        if (mError != null && !mErrorWasChanged) {
4869            setError(null, null);
4870        }
4871    }
4872
4873    @Override
4874    public boolean onKeyUp(int keyCode, KeyEvent event) {
4875        if (!isEnabled()) {
4876            return super.onKeyUp(keyCode, event);
4877        }
4878
4879        switch (keyCode) {
4880            case KeyEvent.KEYCODE_DPAD_CENTER:
4881                mDPadCenterIsDown = false;
4882                if (event.hasNoModifiers()) {
4883                    /*
4884                     * If there is a click listener, just call through to
4885                     * super, which will invoke it.
4886                     *
4887                     * If there isn't a click listener, try to show the soft
4888                     * input method.  (It will also
4889                     * call performClick(), but that won't do anything in
4890                     * this case.)
4891                     */
4892                    if (mOnClickListener == null) {
4893                        if (mMovement != null && mText instanceof Editable
4894                                && mLayout != null && onCheckIsTextEditor()) {
4895                            InputMethodManager imm = InputMethodManager.peekInstance();
4896                            if (imm != null) imm.showSoftInput(this, 0);
4897                        }
4898                    }
4899                }
4900                return super.onKeyUp(keyCode, event);
4901
4902            case KeyEvent.KEYCODE_ENTER:
4903                mEnterKeyIsDown = false;
4904                if (event.hasNoModifiers()) {
4905                    if (mInputContentType != null
4906                            && mInputContentType.onEditorActionListener != null
4907                            && mInputContentType.enterDown) {
4908                        mInputContentType.enterDown = false;
4909                        if (mInputContentType.onEditorActionListener.onEditorAction(
4910                                this, EditorInfo.IME_NULL, event)) {
4911                            return true;
4912                        }
4913                    }
4914
4915                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4916                            || shouldAdvanceFocusOnEnter()) {
4917                        /*
4918                         * If there is a click listener, just call through to
4919                         * super, which will invoke it.
4920                         *
4921                         * If there isn't a click listener, try to advance focus,
4922                         * but still call through to super, which will reset the
4923                         * pressed state and longpress state.  (It will also
4924                         * call performClick(), but that won't do anything in
4925                         * this case.)
4926                         */
4927                        if (mOnClickListener == null) {
4928                            View v = focusSearch(FOCUS_DOWN);
4929
4930                            if (v != null) {
4931                                if (!v.requestFocus(FOCUS_DOWN)) {
4932                                    throw new IllegalStateException(
4933                                            "focus search returned a view " +
4934                                            "that wasn't able to take focus!");
4935                                }
4936
4937                                /*
4938                                 * Return true because we handled the key; super
4939                                 * will return false because there was no click
4940                                 * listener.
4941                                 */
4942                                super.onKeyUp(keyCode, event);
4943                                return true;
4944                            } else if ((event.getFlags()
4945                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4946                                // No target for next focus, but make sure the IME
4947                                // if this came from it.
4948                                InputMethodManager imm = InputMethodManager.peekInstance();
4949                                if (imm != null && imm.isActive(this)) {
4950                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4951                                }
4952                            }
4953                        }
4954                    }
4955                    return super.onKeyUp(keyCode, event);
4956                }
4957                break;
4958        }
4959
4960        if (mInput != null)
4961            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4962                return true;
4963
4964        if (mMovement != null && mLayout != null)
4965            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4966                return true;
4967
4968        return super.onKeyUp(keyCode, event);
4969    }
4970
4971    @Override public boolean onCheckIsTextEditor() {
4972        return mInputType != EditorInfo.TYPE_NULL;
4973    }
4974
4975    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4976        if (onCheckIsTextEditor() && isEnabled()) {
4977            if (mInputMethodState == null) {
4978                mInputMethodState = new InputMethodState();
4979            }
4980            outAttrs.inputType = mInputType;
4981            if (mInputContentType != null) {
4982                outAttrs.imeOptions = mInputContentType.imeOptions;
4983                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4984                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4985                outAttrs.actionId = mInputContentType.imeActionId;
4986                outAttrs.extras = mInputContentType.extras;
4987            } else {
4988                outAttrs.imeOptions = EditorInfo.IME_NULL;
4989            }
4990            if (focusSearch(FOCUS_DOWN) != null) {
4991                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
4992            }
4993            if (focusSearch(FOCUS_UP) != null) {
4994                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
4995            }
4996            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4997                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4998                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
4999                    // An action has not been set, but the enter key will move to
5000                    // the next focus, so set the action to that.
5001                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5002                } else {
5003                    // An action has not been set, and there is no focus to move
5004                    // to, so let's just supply a "done" action.
5005                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5006                }
5007                if (!shouldAdvanceFocusOnEnter()) {
5008                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5009                }
5010            }
5011            if (isMultilineInputType(outAttrs.inputType)) {
5012                // Multi-line text editors should always show an enter key.
5013                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5014            }
5015            outAttrs.hintText = mHint;
5016            if (mText instanceof Editable) {
5017                InputConnection ic = new EditableInputConnection(this);
5018                outAttrs.initialSelStart = getSelectionStart();
5019                outAttrs.initialSelEnd = getSelectionEnd();
5020                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5021                return ic;
5022            }
5023        }
5024        return null;
5025    }
5026
5027    /**
5028     * If this TextView contains editable content, extract a portion of it
5029     * based on the information in <var>request</var> in to <var>outText</var>.
5030     * @return Returns true if the text was successfully extracted, else false.
5031     */
5032    public boolean extractText(ExtractedTextRequest request,
5033            ExtractedText outText) {
5034        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5035                EXTRACT_UNKNOWN, outText);
5036    }
5037
5038    static final int EXTRACT_NOTHING = -2;
5039    static final int EXTRACT_UNKNOWN = -1;
5040
5041    boolean extractTextInternal(ExtractedTextRequest request,
5042            int partialStartOffset, int partialEndOffset, int delta,
5043            ExtractedText outText) {
5044        final CharSequence content = mText;
5045        if (content != null) {
5046            if (partialStartOffset != EXTRACT_NOTHING) {
5047                final int N = content.length();
5048                if (partialStartOffset < 0) {
5049                    outText.partialStartOffset = outText.partialEndOffset = -1;
5050                    partialStartOffset = 0;
5051                    partialEndOffset = N;
5052                } else {
5053                    // Now use the delta to determine the actual amount of text
5054                    // we need.
5055                    partialEndOffset += delta;
5056                    // Adjust offsets to ensure we contain full spans.
5057                    if (content instanceof Spanned) {
5058                        Spanned spanned = (Spanned)content;
5059                        Object[] spans = spanned.getSpans(partialStartOffset,
5060                                partialEndOffset, ParcelableSpan.class);
5061                        int i = spans.length;
5062                        while (i > 0) {
5063                            i--;
5064                            int j = spanned.getSpanStart(spans[i]);
5065                            if (j < partialStartOffset) partialStartOffset = j;
5066                            j = spanned.getSpanEnd(spans[i]);
5067                            if (j > partialEndOffset) partialEndOffset = j;
5068                        }
5069                    }
5070                    outText.partialStartOffset = partialStartOffset;
5071                    outText.partialEndOffset = partialEndOffset - delta;
5072
5073                    if (partialStartOffset > N) {
5074                        partialStartOffset = N;
5075                    } else if (partialStartOffset < 0) {
5076                        partialStartOffset = 0;
5077                    }
5078                    if (partialEndOffset > N) {
5079                        partialEndOffset = N;
5080                    } else if (partialEndOffset < 0) {
5081                        partialEndOffset = 0;
5082                    }
5083                }
5084                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5085                    outText.text = content.subSequence(partialStartOffset,
5086                            partialEndOffset);
5087                } else {
5088                    outText.text = TextUtils.substring(content, partialStartOffset,
5089                            partialEndOffset);
5090                }
5091            } else {
5092                outText.partialStartOffset = 0;
5093                outText.partialEndOffset = 0;
5094                outText.text = "";
5095            }
5096            outText.flags = 0;
5097            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5098                outText.flags |= ExtractedText.FLAG_SELECTING;
5099            }
5100            if (mSingleLine) {
5101                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5102            }
5103            outText.startOffset = 0;
5104            outText.selectionStart = getSelectionStart();
5105            outText.selectionEnd = getSelectionEnd();
5106            return true;
5107        }
5108        return false;
5109    }
5110
5111    boolean reportExtractedText() {
5112        final InputMethodState ims = mInputMethodState;
5113        if (ims != null) {
5114            final boolean contentChanged = ims.mContentChanged;
5115            if (contentChanged || ims.mSelectionModeChanged) {
5116                ims.mContentChanged = false;
5117                ims.mSelectionModeChanged = false;
5118                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5119                if (req != null) {
5120                    InputMethodManager imm = InputMethodManager.peekInstance();
5121                    if (imm != null) {
5122                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5123                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5124                                + " delta=" + ims.mChangedDelta);
5125                        if (ims.mChangedStart < 0 && !contentChanged) {
5126                            ims.mChangedStart = EXTRACT_NOTHING;
5127                        }
5128                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5129                                ims.mChangedDelta, ims.mTmpExtracted)) {
5130                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5131                                    + ims.mTmpExtracted.partialStartOffset
5132                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5133                                    + ": " + ims.mTmpExtracted.text);
5134                            imm.updateExtractedText(this, req.token,
5135                                    mInputMethodState.mTmpExtracted);
5136                            ims.mChangedStart = EXTRACT_UNKNOWN;
5137                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5138                            ims.mChangedDelta = 0;
5139                            ims.mContentChanged = false;
5140                            return true;
5141                        }
5142                    }
5143                }
5144            }
5145        }
5146        return false;
5147    }
5148
5149    /**
5150     * This is used to remove all style-impacting spans from text before new
5151     * extracted text is being replaced into it, so that we don't have any
5152     * lingering spans applied during the replace.
5153     */
5154    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5155        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5156        int i = spans.length;
5157        while (i > 0) {
5158            i--;
5159            spannable.removeSpan(spans[i]);
5160        }
5161    }
5162
5163    /**
5164     * Apply to this text view the given extracted text, as previously
5165     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5166     */
5167    public void setExtractedText(ExtractedText text) {
5168        Editable content = getEditableText();
5169        if (text.text != null) {
5170            if (content == null) {
5171                setText(text.text, TextView.BufferType.EDITABLE);
5172            } else if (text.partialStartOffset < 0) {
5173                removeParcelableSpans(content, 0, content.length());
5174                content.replace(0, content.length(), text.text);
5175            } else {
5176                final int N = content.length();
5177                int start = text.partialStartOffset;
5178                if (start > N) start = N;
5179                int end = text.partialEndOffset;
5180                if (end > N) end = N;
5181                removeParcelableSpans(content, start, end);
5182                content.replace(start, end, text.text);
5183            }
5184        }
5185
5186        // Now set the selection position...  make sure it is in range, to
5187        // avoid crashes.  If this is a partial update, it is possible that
5188        // the underlying text may have changed, causing us problems here.
5189        // Also we just don't want to trust clients to do the right thing.
5190        Spannable sp = (Spannable)getText();
5191        final int N = sp.length();
5192        int start = text.selectionStart;
5193        if (start < 0) start = 0;
5194        else if (start > N) start = N;
5195        int end = text.selectionEnd;
5196        if (end < 0) end = 0;
5197        else if (end > N) end = N;
5198        Selection.setSelection(sp, start, end);
5199
5200        // Finally, update the selection mode.
5201        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5202            MetaKeyKeyListener.startSelecting(this, sp);
5203        } else {
5204            MetaKeyKeyListener.stopSelecting(this, sp);
5205        }
5206    }
5207
5208    /**
5209     * @hide
5210     */
5211    public void setExtracting(ExtractedTextRequest req) {
5212        if (mInputMethodState != null) {
5213            mInputMethodState.mExtracting = req;
5214        }
5215        // This stops a possible text selection mode. Maybe not intended.
5216        hideControllers();
5217    }
5218
5219    /**
5220     * Called by the framework in response to a text completion from
5221     * the current input method, provided by it calling
5222     * {@link InputConnection#commitCompletion
5223     * InputConnection.commitCompletion()}.  The default implementation does
5224     * nothing; text views that are supporting auto-completion should override
5225     * this to do their desired behavior.
5226     *
5227     * @param text The auto complete text the user has selected.
5228     */
5229    public void onCommitCompletion(CompletionInfo text) {
5230        // intentionally empty
5231    }
5232
5233    /**
5234     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5235     * a dictionnary) from the current input method, provided by it calling
5236     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5237     * implementation flashes the background of the corrected word to provide feedback to the user.
5238     *
5239     * @param info The auto correct info about the text that was corrected.
5240     */
5241    public void onCommitCorrection(CorrectionInfo info) {
5242        if (mCorrectionHighlighter == null) {
5243            mCorrectionHighlighter = new CorrectionHighlighter();
5244        } else {
5245            mCorrectionHighlighter.invalidate(false);
5246        }
5247
5248        mCorrectionHighlighter.highlight(info);
5249    }
5250
5251    private class CorrectionHighlighter {
5252        private final Path mPath = new Path();
5253        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5254        private int mStart, mEnd;
5255        private long mFadingStartTime;
5256        private final static int FADE_OUT_DURATION = 400;
5257
5258        public CorrectionHighlighter() {
5259            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5260            mPaint.setStyle(Paint.Style.FILL);
5261        }
5262
5263        public void highlight(CorrectionInfo info) {
5264            mStart = info.getOffset();
5265            mEnd = mStart + info.getNewText().length();
5266            mFadingStartTime = SystemClock.uptimeMillis();
5267
5268            if (mStart < 0 || mEnd < 0) {
5269                stopAnimation();
5270            }
5271        }
5272
5273        public void draw(Canvas canvas, int cursorOffsetVertical) {
5274            if (updatePath() && updatePaint()) {
5275                if (cursorOffsetVertical != 0) {
5276                    canvas.translate(0, cursorOffsetVertical);
5277                }
5278
5279                canvas.drawPath(mPath, mPaint);
5280
5281                if (cursorOffsetVertical != 0) {
5282                    canvas.translate(0, -cursorOffsetVertical);
5283                }
5284                invalidate(true);
5285            } else {
5286                stopAnimation();
5287                invalidate(false);
5288            }
5289        }
5290
5291        private boolean updatePaint() {
5292            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5293            if (duration > FADE_OUT_DURATION) return false;
5294
5295            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5296            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5297            final int color = (mHighlightColor & 0x00FFFFFF) +
5298                    ((int) (highlightColorAlpha * coef) << 24);
5299            mPaint.setColor(color);
5300            return true;
5301        }
5302
5303        private boolean updatePath() {
5304            final Layout layout = TextView.this.mLayout;
5305            if (layout == null) return false;
5306
5307            // Update in case text is edited while the animation is run
5308            final int length = mText.length();
5309            int start = Math.min(length, mStart);
5310            int end = Math.min(length, mEnd);
5311
5312            mPath.reset();
5313            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5314            return true;
5315        }
5316
5317        private void invalidate(boolean delayed) {
5318            if (TextView.this.mLayout == null) return;
5319
5320            synchronized (sTempRect) {
5321                mPath.computeBounds(sTempRect, false);
5322
5323                int left = getCompoundPaddingLeft();
5324                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5325
5326                if (delayed) {
5327                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5328                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5329                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5330                } else {
5331                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5332                            (int) sTempRect.right, (int) sTempRect.bottom);
5333                }
5334            }
5335        }
5336
5337        private void stopAnimation() {
5338            TextView.this.mCorrectionHighlighter = null;
5339        }
5340    }
5341
5342    public void beginBatchEdit() {
5343        mInBatchEditControllers = true;
5344        final InputMethodState ims = mInputMethodState;
5345        if (ims != null) {
5346            int nesting = ++ims.mBatchEditNesting;
5347            if (nesting == 1) {
5348                ims.mCursorChanged = false;
5349                ims.mChangedDelta = 0;
5350                if (ims.mContentChanged) {
5351                    // We already have a pending change from somewhere else,
5352                    // so turn this into a full update.
5353                    ims.mChangedStart = 0;
5354                    ims.mChangedEnd = mText.length();
5355                } else {
5356                    ims.mChangedStart = EXTRACT_UNKNOWN;
5357                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5358                    ims.mContentChanged = false;
5359                }
5360                onBeginBatchEdit();
5361            }
5362        }
5363    }
5364
5365    public void endBatchEdit() {
5366        mInBatchEditControllers = false;
5367        final InputMethodState ims = mInputMethodState;
5368        if (ims != null) {
5369            int nesting = --ims.mBatchEditNesting;
5370            if (nesting == 0) {
5371                finishBatchEdit(ims);
5372            }
5373        }
5374    }
5375
5376    void ensureEndedBatchEdit() {
5377        final InputMethodState ims = mInputMethodState;
5378        if (ims != null && ims.mBatchEditNesting != 0) {
5379            ims.mBatchEditNesting = 0;
5380            finishBatchEdit(ims);
5381        }
5382    }
5383
5384    void finishBatchEdit(final InputMethodState ims) {
5385        onEndBatchEdit();
5386
5387        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5388            updateAfterEdit();
5389            reportExtractedText();
5390        } else if (ims.mCursorChanged) {
5391            // Cheezy way to get us to report the current cursor location.
5392            invalidateCursor();
5393        }
5394    }
5395
5396    void updateAfterEdit() {
5397        invalidate();
5398        int curs = getSelectionStart();
5399
5400        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5401            registerForPreDraw();
5402        }
5403
5404        if (curs >= 0) {
5405            mHighlightPathBogus = true;
5406            makeBlink();
5407        }
5408
5409        checkForResize();
5410    }
5411
5412    /**
5413     * Called by the framework in response to a request to begin a batch
5414     * of edit operations through a call to link {@link #beginBatchEdit()}.
5415     */
5416    public void onBeginBatchEdit() {
5417        // intentionally empty
5418    }
5419
5420    /**
5421     * Called by the framework in response to a request to end a batch
5422     * of edit operations through a call to link {@link #endBatchEdit}.
5423     */
5424    public void onEndBatchEdit() {
5425        // intentionally empty
5426    }
5427
5428    /**
5429     * Called by the framework in response to a private command from the
5430     * current method, provided by it calling
5431     * {@link InputConnection#performPrivateCommand
5432     * InputConnection.performPrivateCommand()}.
5433     *
5434     * @param action The action name of the command.
5435     * @param data Any additional data for the command.  This may be null.
5436     * @return Return true if you handled the command, else false.
5437     */
5438    public boolean onPrivateIMECommand(String action, Bundle data) {
5439        return false;
5440    }
5441
5442    private void nullLayouts() {
5443        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5444            mSavedLayout = (BoringLayout) mLayout;
5445        }
5446        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5447            mSavedHintLayout = (BoringLayout) mHintLayout;
5448        }
5449
5450        mLayout = mHintLayout = null;
5451
5452        // Since it depends on the value of mLayout
5453        prepareCursorControllers();
5454    }
5455
5456    /**
5457     * Make a new Layout based on the already-measured size of the view,
5458     * on the assumption that it was measured correctly at some point.
5459     */
5460    private void assumeLayout() {
5461        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5462
5463        if (width < 1) {
5464            width = 0;
5465        }
5466
5467        int physicalWidth = width;
5468
5469        if (mHorizontallyScrolling) {
5470            width = VERY_WIDE;
5471        }
5472
5473        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5474                      physicalWidth, false);
5475    }
5476
5477    /**
5478     * The width passed in is now the desired layout width,
5479     * not the full view width with padding.
5480     * {@hide}
5481     */
5482    protected void makeNewLayout(int w, int hintWidth,
5483                                 BoringLayout.Metrics boring,
5484                                 BoringLayout.Metrics hintBoring,
5485                                 int ellipsisWidth, boolean bringIntoView) {
5486        stopMarquee();
5487
5488        mHighlightPathBogus = true;
5489
5490        if (w < 0) {
5491            w = 0;
5492        }
5493        if (hintWidth < 0) {
5494            hintWidth = 0;
5495        }
5496
5497        Layout.Alignment alignment;
5498        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
5499            case Gravity.CENTER_HORIZONTAL:
5500                alignment = Layout.Alignment.ALIGN_CENTER;
5501                break;
5502
5503            case Gravity.RIGHT:
5504                // Note, Layout resolves ALIGN_OPPOSITE to left or
5505                // right based on the paragraph direction.
5506                alignment = Layout.Alignment.ALIGN_OPPOSITE;
5507                break;
5508
5509            default:
5510                alignment = Layout.Alignment.ALIGN_NORMAL;
5511        }
5512
5513        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5514
5515        if (mText instanceof Spannable) {
5516            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5517                    alignment, mSpacingMult,
5518                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5519                    ellipsisWidth);
5520        } else {
5521            if (boring == UNKNOWN_BORING) {
5522                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5523                if (boring != null) {
5524                    mBoring = boring;
5525                }
5526            }
5527
5528            if (boring != null) {
5529                if (boring.width <= w &&
5530                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
5531                    if (mSavedLayout != null) {
5532                        mLayout = mSavedLayout.
5533                                replaceOrMake(mTransformed, mTextPaint,
5534                                w, alignment, mSpacingMult, mSpacingAdd,
5535                                boring, mIncludePad);
5536                    } else {
5537                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5538                                w, alignment, mSpacingMult, mSpacingAdd,
5539                                boring, mIncludePad);
5540                    }
5541
5542                    mSavedLayout = (BoringLayout) mLayout;
5543                } else if (shouldEllipsize && boring.width <= w) {
5544                    if (mSavedLayout != null) {
5545                        mLayout = mSavedLayout.
5546                                replaceOrMake(mTransformed, mTextPaint,
5547                                w, alignment, mSpacingMult, mSpacingAdd,
5548                                boring, mIncludePad, mEllipsize,
5549                                ellipsisWidth);
5550                    } else {
5551                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5552                                w, alignment, mSpacingMult, mSpacingAdd,
5553                                boring, mIncludePad, mEllipsize,
5554                                ellipsisWidth);
5555                    }
5556                } else if (shouldEllipsize) {
5557                    mLayout = new StaticLayout(mTransformed,
5558                                0, mTransformed.length(),
5559                                mTextPaint, w, alignment, mSpacingMult,
5560                                mSpacingAdd, mIncludePad, mEllipsize,
5561                                ellipsisWidth);
5562                } else {
5563                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5564                            w, alignment, mSpacingMult, mSpacingAdd,
5565                            mIncludePad);
5566                }
5567            } else if (shouldEllipsize) {
5568                mLayout = new StaticLayout(mTransformed,
5569                            0, mTransformed.length(),
5570                            mTextPaint, w, alignment, mSpacingMult,
5571                            mSpacingAdd, mIncludePad, mEllipsize,
5572                            ellipsisWidth);
5573            } else {
5574                mLayout = new StaticLayout(mTransformed, mTextPaint,
5575                        w, alignment, mSpacingMult, mSpacingAdd,
5576                        mIncludePad);
5577            }
5578        }
5579
5580        shouldEllipsize = mEllipsize != null;
5581        mHintLayout = null;
5582
5583        if (mHint != null) {
5584            if (shouldEllipsize) hintWidth = w;
5585
5586            if (hintBoring == UNKNOWN_BORING) {
5587                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5588                                                   mHintBoring);
5589                if (hintBoring != null) {
5590                    mHintBoring = hintBoring;
5591                }
5592            }
5593
5594            if (hintBoring != null) {
5595                if (hintBoring.width <= hintWidth &&
5596                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5597                    if (mSavedHintLayout != null) {
5598                        mHintLayout = mSavedHintLayout.
5599                                replaceOrMake(mHint, mTextPaint,
5600                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5601                                hintBoring, mIncludePad);
5602                    } else {
5603                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5604                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5605                                hintBoring, mIncludePad);
5606                    }
5607
5608                    mSavedHintLayout = (BoringLayout) mHintLayout;
5609                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5610                    if (mSavedHintLayout != null) {
5611                        mHintLayout = mSavedHintLayout.
5612                                replaceOrMake(mHint, mTextPaint,
5613                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5614                                hintBoring, mIncludePad, mEllipsize,
5615                                ellipsisWidth);
5616                    } else {
5617                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5618                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5619                                hintBoring, mIncludePad, mEllipsize,
5620                                ellipsisWidth);
5621                    }
5622                } else if (shouldEllipsize) {
5623                    mHintLayout = new StaticLayout(mHint,
5624                                0, mHint.length(),
5625                                mTextPaint, hintWidth, alignment, mSpacingMult,
5626                                mSpacingAdd, mIncludePad, mEllipsize,
5627                                ellipsisWidth);
5628                } else {
5629                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5630                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5631                            mIncludePad);
5632                }
5633            } else if (shouldEllipsize) {
5634                mHintLayout = new StaticLayout(mHint,
5635                            0, mHint.length(),
5636                            mTextPaint, hintWidth, alignment, mSpacingMult,
5637                            mSpacingAdd, mIncludePad, mEllipsize,
5638                            ellipsisWidth);
5639            } else {
5640                mHintLayout = new StaticLayout(mHint, mTextPaint,
5641                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5642                        mIncludePad);
5643            }
5644        }
5645
5646        if (bringIntoView) {
5647            registerForPreDraw();
5648        }
5649
5650        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5651            if (!compressText(ellipsisWidth)) {
5652                final int height = mLayoutParams.height;
5653                // If the size of the view does not depend on the size of the text, try to
5654                // start the marquee immediately
5655                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5656                    startMarquee();
5657                } else {
5658                    // Defer the start of the marquee until we know our width (see setFrame())
5659                    mRestartMarquee = true;
5660                }
5661            }
5662        }
5663
5664        // CursorControllers need a non-null mLayout
5665        prepareCursorControllers();
5666    }
5667
5668    private boolean compressText(float width) {
5669        if (isHardwareAccelerated()) return false;
5670
5671        // Only compress the text if it hasn't been compressed by the previous pass
5672        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5673                mTextPaint.getTextScaleX() == 1.0f) {
5674            final float textWidth = mLayout.getLineWidth(0);
5675            final float overflow = (textWidth + 1.0f - width) / width;
5676            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5677                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5678                post(new Runnable() {
5679                    public void run() {
5680                        requestLayout();
5681                    }
5682                });
5683                return true;
5684            }
5685        }
5686
5687        return false;
5688    }
5689
5690    private static int desired(Layout layout) {
5691        int n = layout.getLineCount();
5692        CharSequence text = layout.getText();
5693        float max = 0;
5694
5695        // if any line was wrapped, we can't use it.
5696        // but it's ok for the last line not to have a newline
5697
5698        for (int i = 0; i < n - 1; i++) {
5699            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5700                return -1;
5701        }
5702
5703        for (int i = 0; i < n; i++) {
5704            max = Math.max(max, layout.getLineWidth(i));
5705        }
5706
5707        return (int) FloatMath.ceil(max);
5708    }
5709
5710    /**
5711     * Set whether the TextView includes extra top and bottom padding to make
5712     * room for accents that go above the normal ascent and descent.
5713     * The default is true.
5714     *
5715     * @attr ref android.R.styleable#TextView_includeFontPadding
5716     */
5717    public void setIncludeFontPadding(boolean includepad) {
5718        mIncludePad = includepad;
5719
5720        if (mLayout != null) {
5721            nullLayouts();
5722            requestLayout();
5723            invalidate();
5724        }
5725    }
5726
5727    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5728
5729    @Override
5730    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5731        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5732        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5733        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5734        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5735
5736        int width;
5737        int height;
5738
5739        BoringLayout.Metrics boring = UNKNOWN_BORING;
5740        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5741
5742        int des = -1;
5743        boolean fromexisting = false;
5744
5745        if (widthMode == MeasureSpec.EXACTLY) {
5746            // Parent has told us how big to be. So be it.
5747            width = widthSize;
5748        } else {
5749            if (mLayout != null && mEllipsize == null) {
5750                des = desired(mLayout);
5751            }
5752
5753            if (des < 0) {
5754                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5755                if (boring != null) {
5756                    mBoring = boring;
5757                }
5758            } else {
5759                fromexisting = true;
5760            }
5761
5762            if (boring == null || boring == UNKNOWN_BORING) {
5763                if (des < 0) {
5764                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5765                }
5766
5767                width = des;
5768            } else {
5769                width = boring.width;
5770            }
5771
5772            final Drawables dr = mDrawables;
5773            if (dr != null) {
5774                width = Math.max(width, dr.mDrawableWidthTop);
5775                width = Math.max(width, dr.mDrawableWidthBottom);
5776            }
5777
5778            if (mHint != null) {
5779                int hintDes = -1;
5780                int hintWidth;
5781
5782                if (mHintLayout != null && mEllipsize == null) {
5783                    hintDes = desired(mHintLayout);
5784                }
5785
5786                if (hintDes < 0) {
5787                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5788                    if (hintBoring != null) {
5789                        mHintBoring = hintBoring;
5790                    }
5791                }
5792
5793                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5794                    if (hintDes < 0) {
5795                        hintDes = (int) FloatMath.ceil(
5796                                Layout.getDesiredWidth(mHint, mTextPaint));
5797                    }
5798
5799                    hintWidth = hintDes;
5800                } else {
5801                    hintWidth = hintBoring.width;
5802                }
5803
5804                if (hintWidth > width) {
5805                    width = hintWidth;
5806                }
5807            }
5808
5809            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5810
5811            if (mMaxWidthMode == EMS) {
5812                width = Math.min(width, mMaxWidth * getLineHeight());
5813            } else {
5814                width = Math.min(width, mMaxWidth);
5815            }
5816
5817            if (mMinWidthMode == EMS) {
5818                width = Math.max(width, mMinWidth * getLineHeight());
5819            } else {
5820                width = Math.max(width, mMinWidth);
5821            }
5822
5823            // Check against our minimum width
5824            width = Math.max(width, getSuggestedMinimumWidth());
5825
5826            if (widthMode == MeasureSpec.AT_MOST) {
5827                width = Math.min(widthSize, width);
5828            }
5829        }
5830
5831        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5832        int unpaddedWidth = want;
5833
5834        if (mHorizontallyScrolling) want = VERY_WIDE;
5835
5836        int hintWant = want;
5837        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5838
5839        if (mLayout == null) {
5840            makeNewLayout(want, hintWant, boring, hintBoring,
5841                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5842        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5843                   (mLayout.getEllipsizedWidth() !=
5844                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5845            if (mHint == null && mEllipsize == null &&
5846                    want > mLayout.getWidth() &&
5847                    (mLayout instanceof BoringLayout ||
5848                            (fromexisting && des >= 0 && des <= want))) {
5849                mLayout.increaseWidthTo(want);
5850            } else {
5851                makeNewLayout(want, hintWant, boring, hintBoring,
5852                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5853            }
5854        } else {
5855            // Width has not changed.
5856        }
5857
5858        if (heightMode == MeasureSpec.EXACTLY) {
5859            // Parent has told us how big to be. So be it.
5860            height = heightSize;
5861            mDesiredHeightAtMeasure = -1;
5862        } else {
5863            int desired = getDesiredHeight();
5864
5865            height = desired;
5866            mDesiredHeightAtMeasure = desired;
5867
5868            if (heightMode == MeasureSpec.AT_MOST) {
5869                height = Math.min(desired, heightSize);
5870            }
5871        }
5872
5873        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5874        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5875            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5876        }
5877
5878        /*
5879         * We didn't let makeNewLayout() register to bring the cursor into view,
5880         * so do it here if there is any possibility that it is needed.
5881         */
5882        if (mMovement != null ||
5883            mLayout.getWidth() > unpaddedWidth ||
5884            mLayout.getHeight() > unpaddedHeight) {
5885            registerForPreDraw();
5886        } else {
5887            scrollTo(0, 0);
5888        }
5889
5890        setMeasuredDimension(width, height);
5891    }
5892
5893    private int getDesiredHeight() {
5894        return Math.max(
5895                getDesiredHeight(mLayout, true),
5896                getDesiredHeight(mHintLayout, mEllipsize != null));
5897    }
5898
5899    private int getDesiredHeight(Layout layout, boolean cap) {
5900        if (layout == null) {
5901            return 0;
5902        }
5903
5904        int linecount = layout.getLineCount();
5905        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5906        int desired = layout.getLineTop(linecount);
5907
5908        final Drawables dr = mDrawables;
5909        if (dr != null) {
5910            desired = Math.max(desired, dr.mDrawableHeightLeft);
5911            desired = Math.max(desired, dr.mDrawableHeightRight);
5912        }
5913
5914        desired += pad;
5915        layout.setMaximumVisibleLineCount(0);
5916
5917        if (mMaxMode == LINES) {
5918            /*
5919             * Don't cap the hint to a certain number of lines.
5920             * (Do cap it, though, if we have a maximum pixel height.)
5921             */
5922            if (cap) {
5923                if (linecount > mMaximum) {
5924                    layout.setMaximumVisibleLineCount(mMaximum);
5925                    desired = layout.getLineTop(mMaximum);
5926
5927                    if (dr != null) {
5928                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5929                        desired = Math.max(desired, dr.mDrawableHeightRight);
5930                    }
5931
5932                    desired += pad;
5933                    linecount = mMaximum;
5934                }
5935            }
5936        } else {
5937            desired = Math.min(desired, mMaximum);
5938        }
5939
5940        if (mMinMode == LINES) {
5941            if (linecount < mMinimum) {
5942                desired += getLineHeight() * (mMinimum - linecount);
5943            }
5944        } else {
5945            desired = Math.max(desired, mMinimum);
5946        }
5947
5948        // Check against our minimum height
5949        desired = Math.max(desired, getSuggestedMinimumHeight());
5950
5951        return desired;
5952    }
5953
5954    /**
5955     * Check whether a change to the existing text layout requires a
5956     * new view layout.
5957     */
5958    private void checkForResize() {
5959        boolean sizeChanged = false;
5960
5961        if (mLayout != null) {
5962            // Check if our width changed
5963            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5964                sizeChanged = true;
5965                invalidate();
5966            }
5967
5968            // Check if our height changed
5969            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5970                int desiredHeight = getDesiredHeight();
5971
5972                if (desiredHeight != this.getHeight()) {
5973                    sizeChanged = true;
5974                }
5975            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5976                if (mDesiredHeightAtMeasure >= 0) {
5977                    int desiredHeight = getDesiredHeight();
5978
5979                    if (desiredHeight != mDesiredHeightAtMeasure) {
5980                        sizeChanged = true;
5981                    }
5982                }
5983            }
5984        }
5985
5986        if (sizeChanged) {
5987            requestLayout();
5988            // caller will have already invalidated
5989        }
5990    }
5991
5992    /**
5993     * Check whether entirely new text requires a new view layout
5994     * or merely a new text layout.
5995     */
5996    private void checkForRelayout() {
5997        // If we have a fixed width, we can just swap in a new text layout
5998        // if the text height stays the same or if the view height is fixed.
5999
6000        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6001                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6002                (mHint == null || mHintLayout != null) &&
6003                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6004            // Static width, so try making a new text layout.
6005
6006            int oldht = mLayout.getHeight();
6007            int want = mLayout.getWidth();
6008            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6009
6010            /*
6011             * No need to bring the text into view, since the size is not
6012             * changing (unless we do the requestLayout(), in which case it
6013             * will happen at measure).
6014             */
6015            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6016                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6017                          false);
6018
6019            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6020                // In a fixed-height view, so use our new text layout.
6021                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6022                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6023                    invalidate();
6024                    return;
6025                }
6026
6027                // Dynamic height, but height has stayed the same,
6028                // so use our new text layout.
6029                if (mLayout.getHeight() == oldht &&
6030                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6031                    invalidate();
6032                    return;
6033                }
6034            }
6035
6036            // We lose: the height has changed and we have a dynamic height.
6037            // Request a new view layout using our new text layout.
6038            requestLayout();
6039            invalidate();
6040        } else {
6041            // Dynamic width, so we have no choice but to request a new
6042            // view layout with a new text layout.
6043
6044            nullLayouts();
6045            requestLayout();
6046            invalidate();
6047        }
6048    }
6049
6050    /**
6051     * Returns true if anything changed.
6052     */
6053    private boolean bringTextIntoView() {
6054        int line = 0;
6055        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6056            line = mLayout.getLineCount() - 1;
6057        }
6058
6059        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6060        int dir = mLayout.getParagraphDirection(line);
6061        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6062        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6063        int ht = mLayout.getHeight();
6064
6065        int scrollx, scrolly;
6066
6067        if (a == Layout.Alignment.ALIGN_CENTER) {
6068            /*
6069             * Keep centered if possible, or, if it is too wide to fit,
6070             * keep leading edge in view.
6071             */
6072
6073            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6074            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6075
6076            if (right - left < hspace) {
6077                scrollx = (right + left) / 2 - hspace / 2;
6078            } else {
6079                if (dir < 0) {
6080                    scrollx = right - hspace;
6081                } else {
6082                    scrollx = left;
6083                }
6084            }
6085        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
6086            /*
6087             * Keep leading edge in view.
6088             */
6089
6090            if (dir < 0) {
6091                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6092                scrollx = right - hspace;
6093            } else {
6094                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6095            }
6096        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
6097            /*
6098             * Keep trailing edge in view.
6099             */
6100
6101            if (dir < 0) {
6102                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6103            } else {
6104                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6105                scrollx = right - hspace;
6106            }
6107        }
6108
6109        if (ht < vspace) {
6110            scrolly = 0;
6111        } else {
6112            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6113                scrolly = ht - vspace;
6114            } else {
6115                scrolly = 0;
6116            }
6117        }
6118
6119        if (scrollx != mScrollX || scrolly != mScrollY) {
6120            scrollTo(scrollx, scrolly);
6121            return true;
6122        } else {
6123            return false;
6124        }
6125    }
6126
6127    /**
6128     * Move the point, specified by the offset, into the view if it is needed.
6129     * This has to be called after layout. Returns true if anything changed.
6130     */
6131    public boolean bringPointIntoView(int offset) {
6132        boolean changed = false;
6133
6134        int line = mLayout.getLineForOffset(offset);
6135
6136        // FIXME: Is it okay to truncate this, or should we round?
6137        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6138        final int top = mLayout.getLineTop(line);
6139        final int bottom = mLayout.getLineTop(line + 1);
6140
6141        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6142        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6143        int ht = mLayout.getHeight();
6144
6145        int grav;
6146
6147        switch (mLayout.getParagraphAlignment(line)) {
6148            case ALIGN_NORMAL:
6149                grav = 1;
6150                break;
6151
6152            case ALIGN_OPPOSITE:
6153                grav = -1;
6154                break;
6155
6156            default:
6157                grav = 0;
6158        }
6159
6160        grav *= mLayout.getParagraphDirection(line);
6161
6162        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6163        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6164
6165        int hslack = (bottom - top) / 2;
6166        int vslack = hslack;
6167
6168        if (vslack > vspace / 4)
6169            vslack = vspace / 4;
6170        if (hslack > hspace / 4)
6171            hslack = hspace / 4;
6172
6173        int hs = mScrollX;
6174        int vs = mScrollY;
6175
6176        if (top - vs < vslack)
6177            vs = top - vslack;
6178        if (bottom - vs > vspace - vslack)
6179            vs = bottom - (vspace - vslack);
6180        if (ht - vs < vspace)
6181            vs = ht - vspace;
6182        if (0 - vs > 0)
6183            vs = 0;
6184
6185        if (grav != 0) {
6186            if (x - hs < hslack) {
6187                hs = x - hslack;
6188            }
6189            if (x - hs > hspace - hslack) {
6190                hs = x - (hspace - hslack);
6191            }
6192        }
6193
6194        if (grav < 0) {
6195            if (left - hs > 0)
6196                hs = left;
6197            if (right - hs < hspace)
6198                hs = right - hspace;
6199        } else if (grav > 0) {
6200            if (right - hs < hspace)
6201                hs = right - hspace;
6202            if (left - hs > 0)
6203                hs = left;
6204        } else /* grav == 0 */ {
6205            if (right - left <= hspace) {
6206                /*
6207                 * If the entire text fits, center it exactly.
6208                 */
6209                hs = left - (hspace - (right - left)) / 2;
6210            } else if (x > right - hslack) {
6211                /*
6212                 * If we are near the right edge, keep the right edge
6213                 * at the edge of the view.
6214                 */
6215                hs = right - hspace;
6216            } else if (x < left + hslack) {
6217                /*
6218                 * If we are near the left edge, keep the left edge
6219                 * at the edge of the view.
6220                 */
6221                hs = left;
6222            } else if (left > hs) {
6223                /*
6224                 * Is there whitespace visible at the left?  Fix it if so.
6225                 */
6226                hs = left;
6227            } else if (right < hs + hspace) {
6228                /*
6229                 * Is there whitespace visible at the right?  Fix it if so.
6230                 */
6231                hs = right - hspace;
6232            } else {
6233                /*
6234                 * Otherwise, float as needed.
6235                 */
6236                if (x - hs < hslack) {
6237                    hs = x - hslack;
6238                }
6239                if (x - hs > hspace - hslack) {
6240                    hs = x - (hspace - hslack);
6241                }
6242            }
6243        }
6244
6245        if (hs != mScrollX || vs != mScrollY) {
6246            if (mScroller == null) {
6247                scrollTo(hs, vs);
6248            } else {
6249                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6250                int dx = hs - mScrollX;
6251                int dy = vs - mScrollY;
6252
6253                if (duration > ANIMATED_SCROLL_GAP) {
6254                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6255                    awakenScrollBars(mScroller.getDuration());
6256                    invalidate();
6257                } else {
6258                    if (!mScroller.isFinished()) {
6259                        mScroller.abortAnimation();
6260                    }
6261
6262                    scrollBy(dx, dy);
6263                }
6264
6265                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6266            }
6267
6268            changed = true;
6269        }
6270
6271        if (isFocused()) {
6272            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6273            // requestRectangleOnScreen() is in terms of content coordinates.
6274
6275            if (mTempRect == null) mTempRect = new Rect();
6276            mTempRect.set(x, top, x + 1, bottom);
6277            getInterestingRect(mTempRect, line);
6278            mTempRect.offset(mScrollX, mScrollY);
6279
6280            if (requestRectangleOnScreen(mTempRect)) {
6281                changed = true;
6282            }
6283        }
6284
6285        return changed;
6286    }
6287
6288    /**
6289     * Move the cursor, if needed, so that it is at an offset that is visible
6290     * to the user.  This will not move the cursor if it represents more than
6291     * one character (a selection range).  This will only work if the
6292     * TextView contains spannable text; otherwise it will do nothing.
6293     *
6294     * @return True if the cursor was actually moved, false otherwise.
6295     */
6296    public boolean moveCursorToVisibleOffset() {
6297        if (!(mText instanceof Spannable)) {
6298            return false;
6299        }
6300        int start = getSelectionStart();
6301        int end = getSelectionEnd();
6302        if (start != end) {
6303            return false;
6304        }
6305
6306        // First: make sure the line is visible on screen:
6307
6308        int line = mLayout.getLineForOffset(start);
6309
6310        final int top = mLayout.getLineTop(line);
6311        final int bottom = mLayout.getLineTop(line + 1);
6312        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6313        int vslack = (bottom - top) / 2;
6314        if (vslack > vspace / 4)
6315            vslack = vspace / 4;
6316        final int vs = mScrollY;
6317
6318        if (top < (vs+vslack)) {
6319            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6320        } else if (bottom > (vspace+vs-vslack)) {
6321            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6322        }
6323
6324        // Next: make sure the character is visible on screen:
6325
6326        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6327        final int hs = mScrollX;
6328        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6329        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6330
6331        // line might contain bidirectional text
6332        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6333        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6334
6335        int newStart = start;
6336        if (newStart < lowChar) {
6337            newStart = lowChar;
6338        } else if (newStart > highChar) {
6339            newStart = highChar;
6340        }
6341
6342        if (newStart != start) {
6343            Selection.setSelection((Spannable)mText, newStart);
6344            return true;
6345        }
6346
6347        return false;
6348    }
6349
6350    @Override
6351    public void computeScroll() {
6352        if (mScroller != null) {
6353            if (mScroller.computeScrollOffset()) {
6354                mScrollX = mScroller.getCurrX();
6355                mScrollY = mScroller.getCurrY();
6356                invalidateParentCaches();
6357                postInvalidate();  // So we draw again
6358            }
6359        }
6360    }
6361
6362    private void getInterestingRect(Rect r, int line) {
6363        convertFromViewportToContentCoordinates(r);
6364
6365        // Rectangle can can be expanded on first and last line to take
6366        // padding into account.
6367        // TODO Take left/right padding into account too?
6368        if (line == 0) r.top -= getExtendedPaddingTop();
6369        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6370    }
6371
6372    private void convertFromViewportToContentCoordinates(Rect r) {
6373        final int horizontalOffset = viewportToContentHorizontalOffset();
6374        r.left += horizontalOffset;
6375        r.right += horizontalOffset;
6376
6377        final int verticalOffset = viewportToContentVerticalOffset();
6378        r.top += verticalOffset;
6379        r.bottom += verticalOffset;
6380    }
6381
6382    private int viewportToContentHorizontalOffset() {
6383        return getCompoundPaddingLeft() - mScrollX;
6384    }
6385
6386    private int viewportToContentVerticalOffset() {
6387        int offset = getExtendedPaddingTop() - mScrollY;
6388        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6389            offset += getVerticalOffset(false);
6390        }
6391        return offset;
6392    }
6393
6394    @Override
6395    public void debug(int depth) {
6396        super.debug(depth);
6397
6398        String output = debugIndent(depth);
6399        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6400                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6401                + "} ";
6402
6403        if (mText != null) {
6404
6405            output += "mText=\"" + mText + "\" ";
6406            if (mLayout != null) {
6407                output += "mLayout width=" + mLayout.getWidth()
6408                        + " height=" + mLayout.getHeight();
6409            }
6410        } else {
6411            output += "mText=NULL";
6412        }
6413        Log.d(VIEW_LOG_TAG, output);
6414    }
6415
6416    /**
6417     * Convenience for {@link Selection#getSelectionStart}.
6418     */
6419    @ViewDebug.ExportedProperty(category = "text")
6420    public int getSelectionStart() {
6421        return Selection.getSelectionStart(getText());
6422    }
6423
6424    /**
6425     * Convenience for {@link Selection#getSelectionEnd}.
6426     */
6427    @ViewDebug.ExportedProperty(category = "text")
6428    public int getSelectionEnd() {
6429        return Selection.getSelectionEnd(getText());
6430    }
6431
6432    /**
6433     * Return true iff there is a selection inside this text view.
6434     */
6435    public boolean hasSelection() {
6436        final int selectionStart = getSelectionStart();
6437        final int selectionEnd = getSelectionEnd();
6438
6439        return selectionStart >= 0 && selectionStart != selectionEnd;
6440    }
6441
6442    /**
6443     * Sets the properties of this field (lines, horizontally scrolling,
6444     * transformation method) to be for a single-line input.
6445     *
6446     * @attr ref android.R.styleable#TextView_singleLine
6447     */
6448    public void setSingleLine() {
6449        setSingleLine(true);
6450    }
6451
6452    /**
6453     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6454     * transformation method) to be for a single-line input; if false, restores these to the default
6455     * conditions.
6456     *
6457     * Note that the default conditions are not necessarily those that were in effect prior this
6458     * method, and you may want to reset these properties to your custom values.
6459     *
6460     * @attr ref android.R.styleable#TextView_singleLine
6461     */
6462    @android.view.RemotableViewMethod
6463    public void setSingleLine(boolean singleLine) {
6464        // Could be used, but may break backward compatibility.
6465        // if (mSingleLine == singleLine) return;
6466        setInputTypeSingleLine(singleLine);
6467        applySingleLine(singleLine, true, true);
6468    }
6469
6470    /**
6471     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6472     * @param singleLine
6473     */
6474    private void setInputTypeSingleLine(boolean singleLine) {
6475        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6476            if (singleLine) {
6477                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6478            } else {
6479                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6480            }
6481        }
6482    }
6483
6484    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6485            boolean changeMaxLines) {
6486        mSingleLine = singleLine;
6487        if (singleLine) {
6488            setLines(1);
6489            setHorizontallyScrolling(true);
6490            if (applyTransformation) {
6491                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6492            }
6493        } else {
6494            if (changeMaxLines) {
6495                setMaxLines(Integer.MAX_VALUE);
6496            }
6497            setHorizontallyScrolling(false);
6498            if (applyTransformation) {
6499                setTransformationMethod(null);
6500            }
6501        }
6502    }
6503
6504    /**
6505     * Causes words in the text that are longer than the view is wide
6506     * to be ellipsized instead of broken in the middle.  You may also
6507     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6508     * to constrain the text to a single line.  Use <code>null</code>
6509     * to turn off ellipsizing.
6510     *
6511     * @attr ref android.R.styleable#TextView_ellipsize
6512     */
6513    public void setEllipsize(TextUtils.TruncateAt where) {
6514        mEllipsize = where;
6515
6516        if (mLayout != null) {
6517            nullLayouts();
6518            requestLayout();
6519            invalidate();
6520        }
6521    }
6522
6523    /**
6524     * Sets how many times to repeat the marquee animation. Only applied if the
6525     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6526     *
6527     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6528     */
6529    public void setMarqueeRepeatLimit(int marqueeLimit) {
6530        mMarqueeRepeatLimit = marqueeLimit;
6531    }
6532
6533    /**
6534     * Returns where, if anywhere, words that are longer than the view
6535     * is wide should be ellipsized.
6536     */
6537    @ViewDebug.ExportedProperty
6538    public TextUtils.TruncateAt getEllipsize() {
6539        return mEllipsize;
6540    }
6541
6542    /**
6543     * Set the TextView so that when it takes focus, all the text is
6544     * selected.
6545     *
6546     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6547     */
6548    @android.view.RemotableViewMethod
6549    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6550        mSelectAllOnFocus = selectAllOnFocus;
6551
6552        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6553            setText(mText, BufferType.SPANNABLE);
6554        }
6555    }
6556
6557    /**
6558     * Set whether the cursor is visible.  The default is true.
6559     *
6560     * @attr ref android.R.styleable#TextView_cursorVisible
6561     */
6562    @android.view.RemotableViewMethod
6563    public void setCursorVisible(boolean visible) {
6564        if (mCursorVisible != visible) {
6565            mCursorVisible = visible;
6566            invalidate();
6567
6568            makeBlink();
6569
6570            // InsertionPointCursorController depends on mCursorVisible
6571            prepareCursorControllers();
6572        }
6573    }
6574
6575    private boolean isCursorVisible() {
6576        return mCursorVisible && isTextEditable();
6577    }
6578
6579    private boolean canMarquee() {
6580        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6581        return width > 0 && mLayout.getLineWidth(0) > width;
6582    }
6583
6584    private void startMarquee() {
6585        // Do not ellipsize EditText
6586        if (mInput != null) return;
6587
6588        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6589            return;
6590        }
6591
6592        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6593                getLineCount() == 1 && canMarquee()) {
6594
6595            if (mMarquee == null) mMarquee = new Marquee(this);
6596            mMarquee.start(mMarqueeRepeatLimit);
6597        }
6598    }
6599
6600    private void stopMarquee() {
6601        if (mMarquee != null && !mMarquee.isStopped()) {
6602            mMarquee.stop();
6603        }
6604    }
6605
6606    private void startStopMarquee(boolean start) {
6607        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6608            if (start) {
6609                startMarquee();
6610            } else {
6611                stopMarquee();
6612            }
6613        }
6614    }
6615
6616    private static final class Marquee extends Handler {
6617        // TODO: Add an option to configure this
6618        private static final float MARQUEE_DELTA_MAX = 0.07f;
6619        private static final int MARQUEE_DELAY = 1200;
6620        private static final int MARQUEE_RESTART_DELAY = 1200;
6621        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6622        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6623
6624        private static final byte MARQUEE_STOPPED = 0x0;
6625        private static final byte MARQUEE_STARTING = 0x1;
6626        private static final byte MARQUEE_RUNNING = 0x2;
6627
6628        private static final int MESSAGE_START = 0x1;
6629        private static final int MESSAGE_TICK = 0x2;
6630        private static final int MESSAGE_RESTART = 0x3;
6631
6632        private final WeakReference<TextView> mView;
6633
6634        private byte mStatus = MARQUEE_STOPPED;
6635        private final float mScrollUnit;
6636        private float mMaxScroll;
6637        float mMaxFadeScroll;
6638        private float mGhostStart;
6639        private float mGhostOffset;
6640        private float mFadeStop;
6641        private int mRepeatLimit;
6642
6643        float mScroll;
6644
6645        Marquee(TextView v) {
6646            final float density = v.getContext().getResources().getDisplayMetrics().density;
6647            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6648            mView = new WeakReference<TextView>(v);
6649        }
6650
6651        @Override
6652        public void handleMessage(Message msg) {
6653            switch (msg.what) {
6654                case MESSAGE_START:
6655                    mStatus = MARQUEE_RUNNING;
6656                    tick();
6657                    break;
6658                case MESSAGE_TICK:
6659                    tick();
6660                    break;
6661                case MESSAGE_RESTART:
6662                    if (mStatus == MARQUEE_RUNNING) {
6663                        if (mRepeatLimit >= 0) {
6664                            mRepeatLimit--;
6665                        }
6666                        start(mRepeatLimit);
6667                    }
6668                    break;
6669            }
6670        }
6671
6672        void tick() {
6673            if (mStatus != MARQUEE_RUNNING) {
6674                return;
6675            }
6676
6677            removeMessages(MESSAGE_TICK);
6678
6679            final TextView textView = mView.get();
6680            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6681                mScroll += mScrollUnit;
6682                if (mScroll > mMaxScroll) {
6683                    mScroll = mMaxScroll;
6684                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6685                } else {
6686                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6687                }
6688                textView.invalidate();
6689            }
6690        }
6691
6692        void stop() {
6693            mStatus = MARQUEE_STOPPED;
6694            removeMessages(MESSAGE_START);
6695            removeMessages(MESSAGE_RESTART);
6696            removeMessages(MESSAGE_TICK);
6697            resetScroll();
6698        }
6699
6700        private void resetScroll() {
6701            mScroll = 0.0f;
6702            final TextView textView = mView.get();
6703            if (textView != null) textView.invalidate();
6704        }
6705
6706        void start(int repeatLimit) {
6707            if (repeatLimit == 0) {
6708                stop();
6709                return;
6710            }
6711            mRepeatLimit = repeatLimit;
6712            final TextView textView = mView.get();
6713            if (textView != null && textView.mLayout != null) {
6714                mStatus = MARQUEE_STARTING;
6715                mScroll = 0.0f;
6716                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6717                        textView.getCompoundPaddingRight();
6718                final float lineWidth = textView.mLayout.getLineWidth(0);
6719                final float gap = textWidth / 3.0f;
6720                mGhostStart = lineWidth - textWidth + gap;
6721                mMaxScroll = mGhostStart + textWidth;
6722                mGhostOffset = lineWidth + gap;
6723                mFadeStop = lineWidth + textWidth / 6.0f;
6724                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6725
6726                textView.invalidate();
6727                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6728            }
6729        }
6730
6731        float getGhostOffset() {
6732            return mGhostOffset;
6733        }
6734
6735        boolean shouldDrawLeftFade() {
6736            return mScroll <= mFadeStop;
6737        }
6738
6739        boolean shouldDrawGhost() {
6740            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6741        }
6742
6743        boolean isRunning() {
6744            return mStatus == MARQUEE_RUNNING;
6745        }
6746
6747        boolean isStopped() {
6748            return mStatus == MARQUEE_STOPPED;
6749        }
6750    }
6751
6752    /**
6753     * This method is called when the text is changed, in case any subclasses
6754     * would like to know.
6755     *
6756     * Within <code>text</code>, the <code>lengthAfter</code> characters
6757     * beginning at <code>start</code> have just replaced old text that had
6758     * length <code>lengthBefore</code>. It is an error to attempt to make
6759     * changes to <code>text</code> from this callback.
6760     *
6761     * @param text The text the TextView is displaying
6762     * @param start The offset of the start of the range of the text that was
6763     * modified
6764     * @param lengthBefore The length of the former text that has been replaced
6765     * @param lengthAfter The length of the replacement modified text
6766     */
6767    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
6768        // intentionally empty
6769    }
6770
6771    /**
6772     * This method is called when the selection has changed, in case any
6773     * subclasses would like to know.
6774     *
6775     * @param selStart The new selection start location.
6776     * @param selEnd The new selection end location.
6777     */
6778    protected void onSelectionChanged(int selStart, int selEnd) {
6779        // intentionally empty
6780    }
6781
6782    /**
6783     * Adds a TextWatcher to the list of those whose methods are called
6784     * whenever this TextView's text changes.
6785     * <p>
6786     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6787     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6788     * if there are any text changed listeners forces the buffer type to
6789     * Editable if it would not otherwise be and does call this method.
6790     */
6791    public void addTextChangedListener(TextWatcher watcher) {
6792        if (mListeners == null) {
6793            mListeners = new ArrayList<TextWatcher>();
6794        }
6795
6796        mListeners.add(watcher);
6797    }
6798
6799    /**
6800     * Removes the specified TextWatcher from the list of those whose
6801     * methods are called
6802     * whenever this TextView's text changes.
6803     */
6804    public void removeTextChangedListener(TextWatcher watcher) {
6805        if (mListeners != null) {
6806            int i = mListeners.indexOf(watcher);
6807
6808            if (i >= 0) {
6809                mListeners.remove(i);
6810            }
6811        }
6812    }
6813
6814    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6815                                   int after) {
6816        if (mListeners != null) {
6817            final ArrayList<TextWatcher> list = mListeners;
6818            final int count = list.size();
6819            for (int i = 0; i < count; i++) {
6820                list.get(i).beforeTextChanged(text, start, before, after);
6821            }
6822        }
6823    }
6824
6825    /**
6826     * Not private so it can be called from an inner class without going
6827     * through a thunk.
6828     */
6829    void sendOnTextChanged(CharSequence text, int start, int before,
6830                                   int after) {
6831        if (mListeners != null) {
6832            final ArrayList<TextWatcher> list = mListeners;
6833            final int count = list.size();
6834            for (int i = 0; i < count; i++) {
6835                list.get(i).onTextChanged(text, start, before, after);
6836            }
6837        }
6838    }
6839
6840    /**
6841     * Not private so it can be called from an inner class without going
6842     * through a thunk.
6843     */
6844    void sendAfterTextChanged(Editable text) {
6845        if (mListeners != null) {
6846            final ArrayList<TextWatcher> list = mListeners;
6847            final int count = list.size();
6848            for (int i = 0; i < count; i++) {
6849                list.get(i).afterTextChanged(text);
6850            }
6851        }
6852    }
6853
6854    /**
6855     * Not private so it can be called from an inner class without going
6856     * through a thunk.
6857     */
6858    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
6859        final InputMethodState ims = mInputMethodState;
6860        if (ims == null || ims.mBatchEditNesting == 0) {
6861            updateAfterEdit();
6862        }
6863        if (ims != null) {
6864            ims.mContentChanged = true;
6865            if (ims.mChangedStart < 0) {
6866                ims.mChangedStart = start;
6867                ims.mChangedEnd = start+before;
6868            } else {
6869                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6870                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6871            }
6872            ims.mChangedDelta += after-before;
6873        }
6874
6875        sendOnTextChanged(buffer, start, before, after);
6876        onTextChanged(buffer, start, before, after);
6877
6878        // Hide the controllers if the amount of content changed
6879        if (before != after) {
6880            hideControllers();
6881        }
6882    }
6883
6884    /**
6885     * Not private so it can be called from an inner class without going
6886     * through a thunk.
6887     */
6888    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
6889        // XXX Make the start and end move together if this ends up
6890        // spending too much time invalidating.
6891
6892        boolean selChanged = false;
6893        int newSelStart=-1, newSelEnd=-1;
6894
6895        final InputMethodState ims = mInputMethodState;
6896
6897        if (what == Selection.SELECTION_END) {
6898            mHighlightPathBogus = true;
6899            selChanged = true;
6900            newSelEnd = newStart;
6901
6902            if (!isFocused()) {
6903                mSelectionMoved = true;
6904            }
6905
6906            if (oldStart >= 0 || newStart >= 0) {
6907                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6908                registerForPreDraw();
6909                makeBlink();
6910            }
6911        }
6912
6913        if (what == Selection.SELECTION_START) {
6914            mHighlightPathBogus = true;
6915            selChanged = true;
6916            newSelStart = newStart;
6917
6918            if (!isFocused()) {
6919                mSelectionMoved = true;
6920            }
6921
6922            if (oldStart >= 0 || newStart >= 0) {
6923                int end = Selection.getSelectionEnd(buf);
6924                invalidateCursor(end, oldStart, newStart);
6925            }
6926        }
6927
6928        if (selChanged) {
6929            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6930                if (newSelStart < 0) {
6931                    newSelStart = Selection.getSelectionStart(buf);
6932                }
6933                if (newSelEnd < 0) {
6934                    newSelEnd = Selection.getSelectionEnd(buf);
6935                }
6936                onSelectionChanged(newSelStart, newSelEnd);
6937            }
6938        }
6939
6940        if (what instanceof UpdateAppearance ||
6941            what instanceof ParagraphStyle) {
6942            if (ims == null || ims.mBatchEditNesting == 0) {
6943                invalidate();
6944                mHighlightPathBogus = true;
6945                checkForResize();
6946            } else {
6947                ims.mContentChanged = true;
6948            }
6949        }
6950
6951        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6952            mHighlightPathBogus = true;
6953            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6954                ims.mSelectionModeChanged = true;
6955            }
6956
6957            if (Selection.getSelectionStart(buf) >= 0) {
6958                if (ims == null || ims.mBatchEditNesting == 0) {
6959                    invalidateCursor();
6960                } else {
6961                    ims.mCursorChanged = true;
6962                }
6963            }
6964        }
6965
6966        if (what instanceof ParcelableSpan) {
6967            // If this is a span that can be sent to a remote process,
6968            // the current extract editor would be interested in it.
6969            if (ims != null && ims.mExtracting != null) {
6970                if (ims.mBatchEditNesting != 0) {
6971                    if (oldStart >= 0) {
6972                        if (ims.mChangedStart > oldStart) {
6973                            ims.mChangedStart = oldStart;
6974                        }
6975                        if (ims.mChangedStart > oldEnd) {
6976                            ims.mChangedStart = oldEnd;
6977                        }
6978                    }
6979                    if (newStart >= 0) {
6980                        if (ims.mChangedStart > newStart) {
6981                            ims.mChangedStart = newStart;
6982                        }
6983                        if (ims.mChangedStart > newEnd) {
6984                            ims.mChangedStart = newEnd;
6985                        }
6986                    }
6987                } else {
6988                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6989                            + oldStart + "-" + oldEnd + ","
6990                            + newStart + "-" + newEnd + what);
6991                    ims.mContentChanged = true;
6992                }
6993            }
6994        }
6995    }
6996
6997    private class ChangeWatcher
6998    implements TextWatcher, SpanWatcher {
6999
7000        private CharSequence mBeforeText;
7001
7002        public void beforeTextChanged(CharSequence buffer, int start,
7003                                      int before, int after) {
7004            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7005                    + " before=" + before + " after=" + after + ": " + buffer);
7006
7007            if (AccessibilityManager.getInstance(mContext).isEnabled()
7008                    && !isPasswordInputType(mInputType)
7009                    && !hasPasswordTransformationMethod()) {
7010                mBeforeText = buffer.toString();
7011            }
7012
7013            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7014        }
7015
7016        public void onTextChanged(CharSequence buffer, int start,
7017                                  int before, int after) {
7018            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7019                    + " before=" + before + " after=" + after + ": " + buffer);
7020            TextView.this.handleTextChanged(buffer, start, before, after);
7021
7022            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7023                    (isFocused() || isSelected() &&
7024                    isShown())) {
7025                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7026                mBeforeText = null;
7027            }
7028        }
7029
7030        public void afterTextChanged(Editable buffer) {
7031            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7032            TextView.this.sendAfterTextChanged(buffer);
7033
7034            if (MetaKeyKeyListener.getMetaState(buffer,
7035                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7036                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7037            }
7038        }
7039
7040        public void onSpanChanged(Spannable buf,
7041                                  Object what, int s, int e, int st, int en) {
7042            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7043                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7044            TextView.this.spanChange(buf, what, s, st, e, en);
7045        }
7046
7047        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7048            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7049                    + " what=" + what + ": " + buf);
7050            TextView.this.spanChange(buf, what, -1, s, -1, e);
7051        }
7052
7053        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7054            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7055                    + " what=" + what + ": " + buf);
7056            TextView.this.spanChange(buf, what, s, -1, e, -1);
7057        }
7058    }
7059
7060    /**
7061     * @hide
7062     */
7063    @Override
7064    public void dispatchFinishTemporaryDetach() {
7065        mDispatchTemporaryDetach = true;
7066        super.dispatchFinishTemporaryDetach();
7067        mDispatchTemporaryDetach = false;
7068    }
7069
7070    @Override
7071    public void onStartTemporaryDetach() {
7072        super.onStartTemporaryDetach();
7073        // Only track when onStartTemporaryDetach() is called directly,
7074        // usually because this instance is an editable field in a list
7075        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7076
7077        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7078        // selection becomes visible again. Until a better solution is found, stop text selection
7079        // mode (if any) as soon as this TextView is recycled.
7080        stopSelectionActionMode();
7081    }
7082
7083    @Override
7084    public void onFinishTemporaryDetach() {
7085        super.onFinishTemporaryDetach();
7086        // Only track when onStartTemporaryDetach() is called directly,
7087        // usually because this instance is an editable field in a list
7088        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7089    }
7090
7091    @Override
7092    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7093        if (mTemporaryDetach) {
7094            // If we are temporarily in the detach state, then do nothing.
7095            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7096            return;
7097        }
7098
7099        mShowCursor = SystemClock.uptimeMillis();
7100
7101        ensureEndedBatchEdit();
7102
7103        if (focused) {
7104            int selStart = getSelectionStart();
7105            int selEnd = getSelectionEnd();
7106
7107            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7108            // mode for these, unless there was a specific selection already started.
7109            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7110                    selEnd == mText.length();
7111            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7112
7113            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7114                // If a tap was used to give focus to that view, move cursor at tap position.
7115                // Has to be done before onTakeFocus, which can be overloaded.
7116                final int lastTapPosition = getLastTapPosition();
7117                if (lastTapPosition >= 0) {
7118                    Selection.setSelection((Spannable) mText, lastTapPosition);
7119                }
7120
7121                if (mMovement != null) {
7122                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7123                }
7124
7125                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7126                // pressed. Since it is the ViewRoot's mView, it requests focus before
7127                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7128                // This special case ensure that we keep current selection in that case.
7129                // It would be better to know why the DecorView does not have focus at that time.
7130                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7131                        selStart >= 0 && selEnd >= 0) {
7132                    /*
7133                     * Someone intentionally set the selection, so let them
7134                     * do whatever it is that they wanted to do instead of
7135                     * the default on-focus behavior.  We reset the selection
7136                     * here instead of just skipping the onTakeFocus() call
7137                     * because some movement methods do something other than
7138                     * just setting the selection in theirs and we still
7139                     * need to go through that path.
7140                     */
7141                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7142                }
7143
7144                if (mSelectAllOnFocus) {
7145                    selectAll();
7146                }
7147
7148                mTouchFocusSelected = true;
7149            }
7150
7151            mFrozenWithFocus = false;
7152            mSelectionMoved = false;
7153
7154            if (mText instanceof Spannable) {
7155                Spannable sp = (Spannable) mText;
7156                MetaKeyKeyListener.resetMetaState(sp);
7157            }
7158
7159            makeBlink();
7160
7161            if (mError != null) {
7162                showError();
7163            }
7164        } else {
7165            if (mError != null) {
7166                hideError();
7167            }
7168            // Don't leave us in the middle of a batch edit.
7169            onEndBatchEdit();
7170
7171            if (this instanceof ExtractEditText) {
7172                // terminateTextSelectionMode removes selection, which we want to keep when
7173                // ExtractEditText goes out of focus.
7174                final int selStart = getSelectionStart();
7175                final int selEnd = getSelectionEnd();
7176                hideControllers();
7177                Selection.setSelection((Spannable) mText, selStart, selEnd);
7178            } else {
7179                hideControllers();
7180            }
7181
7182            // No need to create the controller
7183            if (mSelectionModifierCursorController != null) {
7184                mSelectionModifierCursorController.resetTouchOffsets();
7185            }
7186        }
7187
7188        startStopMarquee(focused);
7189
7190        if (mTransformation != null) {
7191            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7192        }
7193
7194        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7195
7196        // Performed after super.onFocusChanged so that this TextView is registered and can ask for
7197        // the IME. Showing the IME while focus is moved using the D-Pad is a bad idea, however this
7198        // does not happen in that case (using the arrows on a bluetooth keyboard).
7199        if (focused && isTextEditable()) {
7200            final InputMethodManager imm = InputMethodManager.peekInstance();
7201            if (imm != null) imm.showSoftInput(this, 0);
7202        }
7203    }
7204
7205    private int getLastTapPosition() {
7206        // No need to create the controller at that point, no last tap position saved
7207        if (mSelectionModifierCursorController != null) {
7208            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7209            if (lastTapPosition >= 0) {
7210                // Safety check, should not be possible.
7211                if (lastTapPosition > mText.length()) {
7212                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7213                            + mText.length() + ")");
7214                    lastTapPosition = mText.length();
7215                }
7216                return lastTapPosition;
7217            }
7218        }
7219
7220        return -1;
7221    }
7222
7223    @Override
7224    public void onWindowFocusChanged(boolean hasWindowFocus) {
7225        super.onWindowFocusChanged(hasWindowFocus);
7226
7227        if (hasWindowFocus) {
7228            if (mBlink != null) {
7229                mBlink.uncancel();
7230                makeBlink();
7231            }
7232        } else {
7233            if (mBlink != null) {
7234                mBlink.cancel();
7235            }
7236            // Don't leave us in the middle of a batch edit.
7237            onEndBatchEdit();
7238            if (mInputContentType != null) {
7239                mInputContentType.enterDown = false;
7240            }
7241            hideControllers();
7242        }
7243
7244        startStopMarquee(hasWindowFocus);
7245    }
7246
7247    @Override
7248    protected void onVisibilityChanged(View changedView, int visibility) {
7249        super.onVisibilityChanged(changedView, visibility);
7250        if (visibility != VISIBLE) {
7251            hideControllers();
7252        }
7253    }
7254
7255    /**
7256     * Use {@link BaseInputConnection#removeComposingSpans
7257     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7258     * state from this text view.
7259     */
7260    public void clearComposingText() {
7261        if (mText instanceof Spannable) {
7262            BaseInputConnection.removeComposingSpans((Spannable)mText);
7263        }
7264    }
7265
7266    @Override
7267    public void setSelected(boolean selected) {
7268        boolean wasSelected = isSelected();
7269
7270        super.setSelected(selected);
7271
7272        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7273            if (selected) {
7274                startMarquee();
7275            } else {
7276                stopMarquee();
7277            }
7278        }
7279    }
7280
7281    @Override
7282    public boolean onTouchEvent(MotionEvent event) {
7283        final int action = event.getActionMasked();
7284
7285        if (hasInsertionController()) {
7286            getInsertionController().onTouchEvent(event);
7287        }
7288        if (hasSelectionController()) {
7289            getSelectionController().onTouchEvent(event);
7290        }
7291
7292        if (action == MotionEvent.ACTION_DOWN) {
7293            mLastDownPositionX = (int) event.getX();
7294            mLastDownPositionY = (int) event.getY();
7295
7296            // Reset this state; it will be re-set if super.onTouchEvent
7297            // causes focus to move to the view.
7298            mTouchFocusSelected = false;
7299            mIgnoreActionUpEvent = false;
7300        }
7301
7302        final boolean superResult = super.onTouchEvent(event);
7303
7304        /*
7305         * Don't handle the release after a long press, because it will
7306         * move the selection away from whatever the menu action was
7307         * trying to affect.
7308         */
7309        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7310            mDiscardNextActionUp = false;
7311            return superResult;
7312        }
7313
7314        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7315                isFocused();
7316
7317        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7318                && mText instanceof Spannable && mLayout != null) {
7319            boolean handled = false;
7320
7321            if (mMovement != null) {
7322                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7323            }
7324
7325            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7326                // The LinkMovementMethod which should handle taps on links has not been installed
7327                // to support text selection. We reproduce its behavior here to open links.
7328                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7329                        getSelectionEnd(), ClickableSpan.class);
7330
7331                if (links.length != 0) {
7332                    links[0].onClick(this);
7333                    handled = true;
7334                }
7335            }
7336
7337            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7338                // Show the IME, except when selecting in read-only text.
7339                if (!mTextIsSelectable) {
7340                    final InputMethodManager imm = InputMethodManager.peekInstance();
7341                    handled |= imm != null && imm.showSoftInput(this, 0);
7342                }
7343
7344                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7345                if (!selectAllGotFocus && hasSelection()) {
7346                    startSelectionActionMode();
7347                } else {
7348                    stopSelectionActionMode();
7349                    if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7350                        getInsertionController().show();
7351                    }
7352                }
7353            }
7354
7355            if (handled) {
7356                return true;
7357            }
7358        }
7359
7360        return superResult;
7361    }
7362
7363    @Override
7364    public boolean onGenericMotionEvent(MotionEvent event) {
7365        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7366            try {
7367                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7368                    return true;
7369                }
7370            } catch (AbstractMethodError ex) {
7371                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7372                // Ignore its absence in case third party applications implemented the
7373                // interface directly.
7374            }
7375        }
7376        return super.onGenericMotionEvent(event);
7377    }
7378
7379    private void prepareCursorControllers() {
7380        boolean windowSupportsHandles = false;
7381
7382        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7383        if (params instanceof WindowManager.LayoutParams) {
7384            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7385            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7386                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7387        }
7388
7389        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7390        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7391                mLayout != null;
7392
7393        if (!mInsertionControllerEnabled) {
7394            hideInsertionPointCursorController();
7395            if (mInsertionPointCursorController != null) {
7396                mInsertionPointCursorController.onDetached();
7397                mInsertionPointCursorController = null;
7398            }
7399        }
7400
7401        if (!mSelectionControllerEnabled) {
7402            stopSelectionActionMode();
7403            if (mSelectionModifierCursorController != null) {
7404                mSelectionModifierCursorController.onDetached();
7405                mSelectionModifierCursorController = null;
7406            }
7407        }
7408    }
7409
7410    /**
7411     * @return True iff this TextView contains a text that can be edited, or if this is
7412     * a selectable TextView.
7413     */
7414    private boolean isTextEditable() {
7415        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7416    }
7417
7418    /**
7419     * Returns true, only while processing a touch gesture, if the initial
7420     * touch down event caused focus to move to the text view and as a result
7421     * its selection changed.  Only valid while processing the touch gesture
7422     * of interest.
7423     */
7424    public boolean didTouchFocusSelect() {
7425        return mTouchFocusSelected;
7426    }
7427
7428    @Override
7429    public void cancelLongPress() {
7430        super.cancelLongPress();
7431        mIgnoreActionUpEvent = true;
7432    }
7433
7434    @Override
7435    public boolean onTrackballEvent(MotionEvent event) {
7436        if (mMovement != null && mText instanceof Spannable &&
7437            mLayout != null) {
7438            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7439                return true;
7440            }
7441        }
7442
7443        return super.onTrackballEvent(event);
7444    }
7445
7446    public void setScroller(Scroller s) {
7447        mScroller = s;
7448    }
7449
7450    private static class Blink extends Handler implements Runnable {
7451        private final WeakReference<TextView> mView;
7452        private boolean mCancelled;
7453
7454        public Blink(TextView v) {
7455            mView = new WeakReference<TextView>(v);
7456        }
7457
7458        public void run() {
7459            if (mCancelled) {
7460                return;
7461            }
7462
7463            removeCallbacks(Blink.this);
7464
7465            TextView tv = mView.get();
7466
7467            if (tv != null && tv.shouldBlink()) {
7468                if (tv.mLayout != null) {
7469                    tv.invalidateCursorPath();
7470                }
7471
7472                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7473            }
7474        }
7475
7476        void cancel() {
7477            if (!mCancelled) {
7478                removeCallbacks(Blink.this);
7479                mCancelled = true;
7480            }
7481        }
7482
7483        void uncancel() {
7484            mCancelled = false;
7485        }
7486    }
7487
7488    /**
7489     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
7490     */
7491    private boolean shouldBlink() {
7492        if (!isFocused()) return false;
7493
7494        final int start = getSelectionStart();
7495        if (start < 0) return false;
7496
7497        final int end = getSelectionEnd();
7498        if (end < 0) return false;
7499
7500        return start == end;
7501    }
7502
7503    private void makeBlink() {
7504        if (isCursorVisible()) {
7505            if (shouldBlink()) {
7506                mShowCursor = SystemClock.uptimeMillis();
7507                if (mBlink == null) mBlink = new Blink(this);
7508                mBlink.removeCallbacks(mBlink);
7509                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
7510            }
7511        } else {
7512            if (mBlink != null) mBlink.removeCallbacks(mBlink);
7513        }
7514    }
7515
7516    @Override
7517    protected float getLeftFadingEdgeStrength() {
7518        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7519        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7520            if (mMarquee != null && !mMarquee.isStopped()) {
7521                final Marquee marquee = mMarquee;
7522                if (marquee.shouldDrawLeftFade()) {
7523                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7524                } else {
7525                    return 0.0f;
7526                }
7527            } else if (getLineCount() == 1) {
7528                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7529                    case Gravity.LEFT:
7530                        return 0.0f;
7531                    case Gravity.RIGHT:
7532                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7533                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7534                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7535                    case Gravity.CENTER_HORIZONTAL:
7536                        return 0.0f;
7537                }
7538            }
7539        }
7540        return super.getLeftFadingEdgeStrength();
7541    }
7542
7543    @Override
7544    protected float getRightFadingEdgeStrength() {
7545        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7546        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7547            if (mMarquee != null && !mMarquee.isStopped()) {
7548                final Marquee marquee = mMarquee;
7549                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7550            } else if (getLineCount() == 1) {
7551                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7552                    case Gravity.LEFT:
7553                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7554                                getCompoundPaddingRight();
7555                        final float lineWidth = mLayout.getLineWidth(0);
7556                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7557                    case Gravity.RIGHT:
7558                        return 0.0f;
7559                    case Gravity.CENTER_HORIZONTAL:
7560                    case Gravity.FILL_HORIZONTAL:
7561                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7562                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7563                                getHorizontalFadingEdgeLength();
7564                }
7565            }
7566        }
7567        return super.getRightFadingEdgeStrength();
7568    }
7569
7570    @Override
7571    protected int computeHorizontalScrollRange() {
7572        if (mLayout != null) {
7573            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7574                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7575        }
7576
7577        return super.computeHorizontalScrollRange();
7578    }
7579
7580    @Override
7581    protected int computeVerticalScrollRange() {
7582        if (mLayout != null)
7583            return mLayout.getHeight();
7584
7585        return super.computeVerticalScrollRange();
7586    }
7587
7588    @Override
7589    protected int computeVerticalScrollExtent() {
7590        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7591    }
7592
7593    public enum BufferType {
7594        NORMAL, SPANNABLE, EDITABLE,
7595    }
7596
7597    /**
7598     * Returns the TextView_textColor attribute from the
7599     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7600     * from the TextView_textAppearance attribute, if TextView_textColor
7601     * was not set directly.
7602     */
7603    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7604        ColorStateList colors;
7605        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7606                                         TextView_textColor);
7607
7608        if (colors == null) {
7609            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7610                                         TextView_textAppearance, -1);
7611            if (ap != -1) {
7612                TypedArray appearance;
7613                appearance = context.obtainStyledAttributes(ap,
7614                                            com.android.internal.R.styleable.TextAppearance);
7615                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7616                                                  TextAppearance_textColor);
7617                appearance.recycle();
7618            }
7619        }
7620
7621        return colors;
7622    }
7623
7624    /**
7625     * Returns the default color from the TextView_textColor attribute
7626     * from the AttributeSet, if set, or the default color from the
7627     * TextAppearance_textColor from the TextView_textAppearance attribute,
7628     * if TextView_textColor was not set directly.
7629     */
7630    public static int getTextColor(Context context,
7631                                   TypedArray attrs,
7632                                   int def) {
7633        ColorStateList colors = getTextColors(context, attrs);
7634
7635        if (colors == null) {
7636            return def;
7637        } else {
7638            return colors.getDefaultColor();
7639        }
7640    }
7641
7642    @Override
7643    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7644        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7645        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7646            switch (keyCode) {
7647            case KeyEvent.KEYCODE_A:
7648                if (canSelectText()) {
7649                    return onTextContextMenuItem(ID_SELECT_ALL);
7650                }
7651                break;
7652            case KeyEvent.KEYCODE_X:
7653                if (canCut()) {
7654                    return onTextContextMenuItem(ID_CUT);
7655                }
7656                break;
7657            case KeyEvent.KEYCODE_C:
7658                if (canCopy()) {
7659                    return onTextContextMenuItem(ID_COPY);
7660                }
7661                break;
7662            case KeyEvent.KEYCODE_V:
7663                if (canPaste()) {
7664                    return onTextContextMenuItem(ID_PASTE);
7665                }
7666                break;
7667            }
7668        }
7669        return super.onKeyShortcut(keyCode, event);
7670    }
7671
7672    /**
7673     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7674     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7675     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7676     */
7677    private boolean canSelectText() {
7678        return hasSelectionController() && mText.length() != 0;
7679    }
7680
7681    /**
7682     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7683     * The text must be spannable and the movement method must allow for arbitary selection.
7684     *
7685     * See also {@link #canSelectText()}.
7686     */
7687    private boolean textCanBeSelected() {
7688        // prepareCursorController() relies on this method.
7689        // If you change this condition, make sure prepareCursorController is called anywhere
7690        // the value of this condition might be changed.
7691        return mText instanceof Spannable && mMovement != null && mMovement.canSelectArbitrarily();
7692    }
7693
7694    private boolean canCut() {
7695        if (hasPasswordTransformationMethod()) {
7696            return false;
7697        }
7698
7699        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
7700            return true;
7701        }
7702
7703        return false;
7704    }
7705
7706    private boolean canCopy() {
7707        if (hasPasswordTransformationMethod()) {
7708            return false;
7709        }
7710
7711        if (mText.length() > 0 && hasSelection()) {
7712            return true;
7713        }
7714
7715        return false;
7716    }
7717
7718    private boolean canPaste() {
7719        return (mText instanceof Editable &&
7720                mInput != null &&
7721                getSelectionStart() >= 0 &&
7722                getSelectionEnd() >= 0 &&
7723                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7724                hasPrimaryClip());
7725    }
7726
7727    private boolean isWordCharacter(int c, int type) {
7728        return (c == '\'' || c == '"' ||
7729                type == Character.UPPERCASE_LETTER ||
7730                type == Character.LOWERCASE_LETTER ||
7731                type == Character.TITLECASE_LETTER ||
7732                type == Character.MODIFIER_LETTER ||
7733                type == Character.OTHER_LETTER || // Should handle asian characters
7734                type == Character.DECIMAL_DIGIT_NUMBER);
7735    }
7736
7737    /**
7738     * Returns the offsets delimiting the 'word' located at position offset.
7739     *
7740     * @param offset An offset in the text.
7741     * @return The offsets for the start and end of the word located at <code>offset</code>.
7742     * The two ints offsets are packed in a long using {@link #packRangeInLong(int, int)}.
7743     * Returns -1 if no valid word was found.
7744     */
7745    private long getWordLimitsAt(int offset) {
7746        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7747        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7748
7749        // Text selection is not permitted in password fields
7750        if (hasPasswordTransformationMethod()) {
7751            return -1;
7752        }
7753
7754        final int len = mText.length();
7755
7756        // Specific text fields: always select the entire text
7757        if (klass == InputType.TYPE_CLASS_NUMBER ||
7758                klass == InputType.TYPE_CLASS_PHONE ||
7759                klass == InputType.TYPE_CLASS_DATETIME ||
7760                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7761                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7762                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7763                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7764            return len > 0 ? packRangeInLong(0, len) : -1;
7765        }
7766
7767        int end = Math.min(offset, len);
7768        if (end < 0) {
7769            return -1;
7770        }
7771
7772        final int MAX_LENGTH = 48;
7773        int start = end;
7774
7775        for (; start > 0; start--) {
7776            final char c = mTransformed.charAt(start - 1);
7777            final int type = Character.getType(c);
7778            if (start == end && type == Character.OTHER_PUNCTUATION) {
7779                // Cases where the text ends with a '.' and we select from the end of the line
7780                // (right after the dot), or when we select from the space character in "aaa, bbb".
7781                continue;
7782            }
7783            if (type == Character.SURROGATE) { // Two Character codepoint
7784                end = start - 1; // Recheck as a pair when scanning forward
7785                continue;
7786            }
7787            if (!isWordCharacter(c, type)) break;
7788            if ((end - start) > MAX_LENGTH) return -1;
7789        }
7790
7791        for (; end < len; end++) {
7792            final int c = Character.codePointAt(mTransformed, end);
7793            final int type = Character.getType(c);
7794            if (!isWordCharacter(c, type)) break;
7795            if ((end - start) > MAX_LENGTH) return -1;
7796            if (c > 0xFFFF) { // Two Character codepoint
7797                end++;
7798            }
7799        }
7800
7801        if (start == end) {
7802            return -1;
7803        }
7804
7805        // Two ints packed in a long
7806        return packRangeInLong(start, end);
7807    }
7808
7809    private static long packRangeInLong(int start, int end) {
7810        return (((long) start) << 32) | end;
7811    }
7812
7813    private static int extractRangeStartFromLong(long range) {
7814        return (int) (range >>> 32);
7815    }
7816
7817    private static int extractRangeEndFromLong(long range) {
7818        return (int) (range & 0x00000000FFFFFFFFL);
7819    }
7820
7821    private void selectAll() {
7822        Selection.setSelection((Spannable) mText, 0, mText.length());
7823    }
7824
7825    private void selectCurrentWord() {
7826        if (!canSelectText()) {
7827            return;
7828        }
7829
7830        if (hasPasswordTransformationMethod()) {
7831            // Always select all on a password field.
7832            // Cut/copy menu entries are not available for passwords, but being able to select all
7833            // is however useful to delete or paste to replace the entire content.
7834            selectAll();
7835            return;
7836        }
7837
7838        long lastTouchOffsets = getLastTouchOffsets();
7839        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
7840        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
7841
7842        int selectionStart, selectionEnd;
7843
7844        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7845        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7846        if (urlSpans.length == 1) {
7847            URLSpan url = urlSpans[0];
7848            selectionStart = ((Spanned) mText).getSpanStart(url);
7849            selectionEnd = ((Spanned) mText).getSpanEnd(url);
7850        } else {
7851            long wordLimits = getWordLimitsAt(minOffset);
7852            if (wordLimits >= 0) {
7853                selectionStart = extractRangeStartFromLong(wordLimits);
7854            } else {
7855                selectionStart = Math.max(minOffset - 5, 0);
7856            }
7857
7858            wordLimits = getWordLimitsAt(maxOffset);
7859            if (wordLimits >= 0) {
7860                selectionEnd = extractRangeEndFromLong(wordLimits);
7861            } else {
7862                selectionEnd = Math.min(maxOffset + 5, mText.length());
7863            }
7864        }
7865
7866        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7867    }
7868
7869    private long getLastTouchOffsets() {
7870        int minOffset, maxOffset;
7871
7872        if (mContextMenuTriggeredByKey) {
7873            minOffset = getSelectionStart();
7874            maxOffset = getSelectionEnd();
7875        } else {
7876            SelectionModifierCursorController selectionController = getSelectionController();
7877            minOffset = selectionController.getMinTouchOffset();
7878            maxOffset = selectionController.getMaxTouchOffset();
7879        }
7880
7881        return packRangeInLong(minOffset, maxOffset);
7882    }
7883
7884    @Override
7885    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7886        if (!isShown()) {
7887            return false;
7888        }
7889
7890        final boolean isPassword = hasPasswordTransformationMethod();
7891
7892        if (!isPassword) {
7893            CharSequence text = getText();
7894            if (TextUtils.isEmpty(text)) {
7895                text = getHint();
7896            }
7897            if (!TextUtils.isEmpty(text)) {
7898                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7899                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7900                }
7901                event.getText().add(text);
7902            }
7903        } else {
7904            event.setPassword(isPassword);
7905        }
7906        return false;
7907    }
7908
7909    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7910            int fromIndex, int removedCount, int addedCount) {
7911        AccessibilityEvent event =
7912            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7913        event.setFromIndex(fromIndex);
7914        event.setRemovedCount(removedCount);
7915        event.setAddedCount(addedCount);
7916        event.setBeforeText(beforeText);
7917        sendAccessibilityEventUnchecked(event);
7918    }
7919
7920    @Override
7921    protected void onCreateContextMenu(ContextMenu menu) {
7922        super.onCreateContextMenu(menu);
7923        boolean added = false;
7924        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7925        // Problem with context menu on long press: the menu appears while the key in down and when
7926        // the key is released, the view does not receive the key_up event.
7927        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
7928        // events. We cannot simply clear these flags in onTextContextMenuItem since
7929        // it may not be called (if the user/ discards the context menu with the back key).
7930        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
7931        // available in onTextContextMenuItem.
7932        mDPadCenterIsDown = mEnterKeyIsDown = false;
7933
7934        MenuHandler handler = new MenuHandler();
7935
7936        if (mText instanceof Spanned && hasSelectionController()) {
7937            long lastTouchOffset = getLastTouchOffsets();
7938            final int selStart = extractRangeStartFromLong(lastTouchOffset);
7939            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
7940
7941            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
7942            if (urls.length > 0) {
7943                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7944                        setOnMenuItemClickListener(handler);
7945
7946                added = true;
7947            }
7948        }
7949
7950        // The context menu is not empty, which will prevent the selection mode from starting.
7951        // Add a entry to start it in the context menu.
7952        // TODO Does not handle the case where a subclass does not call super.thisMethod or
7953        // populates the menu AFTER this call.
7954        if (menu.size() > 0) {
7955            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
7956                    setOnMenuItemClickListener(handler);
7957            added = true;
7958        }
7959
7960        if (added) {
7961            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7962        }
7963    }
7964
7965    /**
7966     * Returns whether this text view is a current input method target.  The
7967     * default implementation just checks with {@link InputMethodManager}.
7968     */
7969    public boolean isInputMethodTarget() {
7970        InputMethodManager imm = InputMethodManager.peekInstance();
7971        return imm != null && imm.isActive(this);
7972    }
7973
7974    // Selection context mode
7975    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7976    private static final int ID_CUT = android.R.id.cut;
7977    private static final int ID_COPY = android.R.id.copy;
7978    private static final int ID_PASTE = android.R.id.paste;
7979    // Context menu entries
7980    private static final int ID_COPY_URL = android.R.id.copyUrl;
7981    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
7982
7983    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7984        public boolean onMenuItemClick(MenuItem item) {
7985            return onTextContextMenuItem(item.getItemId());
7986        }
7987    }
7988
7989    /**
7990     * Called when a context menu option for the text view is selected.  Currently
7991     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
7992     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
7993     * or {@link android.R.id#copy}.
7994     */
7995    public boolean onTextContextMenuItem(int id) {
7996        int min = 0;
7997        int max = mText.length();
7998
7999        if (isFocused()) {
8000            final int selStart = getSelectionStart();
8001            final int selEnd = getSelectionEnd();
8002
8003            min = Math.max(0, Math.min(selStart, selEnd));
8004            max = Math.max(0, Math.max(selStart, selEnd));
8005        }
8006
8007        switch (id) {
8008            case ID_COPY_URL:
8009                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8010                if (urls.length >= 1) {
8011                    ClipData clip = null;
8012                    for (int i=0; i<urls.length; i++) {
8013                        Uri uri = Uri.parse(urls[0].getURL());
8014                        if (clip == null) {
8015                            clip = ClipData.newRawUri(null, uri);
8016                        } else {
8017                            clip.addItem(new ClipData.Item(uri));
8018                        }
8019                    }
8020                    if (clip != null) {
8021                        setPrimaryClip(clip);
8022                    }
8023                }
8024                stopSelectionActionMode();
8025                return true;
8026
8027            case ID_SELECTION_MODE:
8028                if (mSelectionActionMode != null) {
8029                    // Selection mode is already started, simply change selected part.
8030                    updateSelectedRegion();
8031                } else {
8032                    startSelectionActionMode();
8033                }
8034                return true;
8035
8036            case ID_SELECT_ALL:
8037                // This does not enter text selection mode. Text is highlighted, so that it can be
8038                // bulk edited, like selectAllOnFocus does.
8039                selectAll();
8040                return true;
8041
8042            case ID_PASTE:
8043                paste(min, max);
8044                return true;
8045
8046            case ID_CUT:
8047                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8048                ((Editable) mText).delete(min, max);
8049                stopSelectionActionMode();
8050                return true;
8051
8052            case ID_COPY:
8053                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8054                stopSelectionActionMode();
8055                return true;
8056        }
8057        return false;
8058    }
8059
8060    /**
8061     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8062     * by [min, max] when replacing this region by paste.
8063     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8064     * make sure we do not add an extra one from the paste content.
8065     */
8066    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8067        if (paste.length() > 0) {
8068            if (min > 0) {
8069                final char charBefore = mTransformed.charAt(min - 1);
8070                final char charAfter = paste.charAt(0);
8071
8072                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8073                    // Two spaces at beginning of paste: remove one
8074                    final int originalLength = mText.length();
8075                    ((Editable) mText).delete(min - 1, min);
8076                    // Due to filters, there is no guarantee that exactly one character was
8077                    // removed: count instead.
8078                    final int delta = mText.length() - originalLength;
8079                    min += delta;
8080                    max += delta;
8081                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8082                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8083                    // No space at beginning of paste: add one
8084                    final int originalLength = mText.length();
8085                    ((Editable) mText).replace(min, min, " ");
8086                    // Taking possible filters into account as above.
8087                    final int delta = mText.length() - originalLength;
8088                    min += delta;
8089                    max += delta;
8090                }
8091            }
8092
8093            if (max < mText.length()) {
8094                final char charBefore = paste.charAt(paste.length() - 1);
8095                final char charAfter = mTransformed.charAt(max);
8096
8097                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8098                    // Two spaces at end of paste: remove one
8099                    ((Editable) mText).delete(max, max + 1);
8100                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8101                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8102                    // No space at end of paste: add one
8103                    ((Editable) mText).replace(max, max, " ");
8104                }
8105            }
8106        }
8107
8108        return packRangeInLong(min, max);
8109    }
8110
8111    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8112        TextView shadowView = (TextView) inflate(mContext,
8113                com.android.internal.R.layout.text_drag_thumbnail, null);
8114
8115        if (shadowView == null) {
8116            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8117        }
8118
8119        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8120            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8121        }
8122        shadowView.setText(text);
8123        shadowView.setTextColor(getTextColors());
8124
8125        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8126        shadowView.setGravity(Gravity.CENTER);
8127
8128        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8129                ViewGroup.LayoutParams.WRAP_CONTENT));
8130
8131        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8132        shadowView.measure(size, size);
8133
8134        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8135        shadowView.invalidate();
8136        return new DragShadowBuilder(shadowView);
8137    }
8138
8139    private static class DragLocalState {
8140        public TextView sourceTextView;
8141        public int start, end;
8142
8143        public DragLocalState(TextView sourceTextView, int start, int end) {
8144            this.sourceTextView = sourceTextView;
8145            this.start = start;
8146            this.end = end;
8147        }
8148    }
8149
8150    @Override
8151    public boolean performLongClick() {
8152        if (super.performLongClick()) {
8153            mDiscardNextActionUp = true;
8154            return true;
8155        }
8156
8157        boolean handled = false;
8158
8159        // Long press in empty space moves cursor and shows the Paste affordance if available.
8160        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8161                mInsertionControllerEnabled) {
8162            final int offset = getOffset(mLastDownPositionX, mLastDownPositionY);
8163            stopSelectionActionMode();
8164            Selection.setSelection((Spannable)mText, offset);
8165            getInsertionController().showWithPaste();
8166            handled = true;
8167        }
8168
8169        if (!handled && mSelectionActionMode != null) {
8170            if (touchPositionIsInSelection()) {
8171                // Start a drag
8172                final int start = getSelectionStart();
8173                final int end = getSelectionEnd();
8174                CharSequence selectedText = mTransformed.subSequence(start, end);
8175                ClipData data = ClipData.newPlainText(null, selectedText);
8176                DragLocalState localState = new DragLocalState(this, start, end);
8177                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8178                stopSelectionActionMode();
8179            } else {
8180                // New selection at touch position
8181                updateSelectedRegion();
8182            }
8183            handled = true;
8184        }
8185
8186        // Start a new selection
8187        handled |= !handled && startSelectionActionMode();
8188
8189        if (handled) {
8190            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8191            mDiscardNextActionUp = true;
8192        }
8193
8194        return handled;
8195    }
8196
8197    /**
8198     * When selection mode is already started, this method simply updates the selected part of text
8199     * to the text under the finger.
8200     */
8201    private void updateSelectedRegion() {
8202        // Start a new selection at current position, keep selectionAction mode on
8203        selectCurrentWord();
8204        // Updates handles' positions
8205        getSelectionController().show();
8206    }
8207
8208    private boolean touchPositionIsInSelection() {
8209        int selectionStart = getSelectionStart();
8210        int selectionEnd = getSelectionEnd();
8211
8212        if (selectionStart == selectionEnd) {
8213            return false;
8214        }
8215
8216        if (selectionStart > selectionEnd) {
8217            int tmp = selectionStart;
8218            selectionStart = selectionEnd;
8219            selectionEnd = tmp;
8220            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8221        }
8222
8223        SelectionModifierCursorController selectionController = getSelectionController();
8224        int minOffset = selectionController.getMinTouchOffset();
8225        int maxOffset = selectionController.getMaxTouchOffset();
8226
8227        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8228    }
8229
8230    /**
8231     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8232     * selection is initiated in this View.
8233     *
8234     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8235     * Paste actions, depending on what this View supports.
8236     *
8237     * A custom implementation can add new entries in the default menu in its
8238     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
8239     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
8240     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
8241     * {@link android.R.id#paste} ids as parameters.
8242     *
8243     * Returning false from {@link ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will
8244     * prevent the action mode from being started.
8245     *
8246     * Action click events should be handled by the custom implementation of
8247     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8248     *
8249     * Note that text selection mode is not started when a TextView receives focus and the
8250     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8251     * that case, to allow for quick replacement.
8252     */
8253    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8254        mCustomSelectionActionModeCallback = actionModeCallback;
8255    }
8256
8257    /**
8258     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8259     *
8260     * @return The current custom selection callback.
8261     */
8262    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8263        return mCustomSelectionActionModeCallback;
8264    }
8265
8266    /**
8267     *
8268     * @return true if the selection mode was actually started.
8269     */
8270    private boolean startSelectionActionMode() {
8271        if (mSelectionActionMode != null) {
8272            // Selection action mode is already started
8273            return false;
8274        }
8275
8276        if (!canSelectText() || !requestFocus()) {
8277            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8278            return false;
8279        }
8280
8281        if (!hasSelection()) {
8282            // If selection mode is started after a device rotation, there is already a selection.
8283            selectCurrentWord();
8284        }
8285
8286        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8287        mSelectionActionMode = startActionMode(actionModeCallback);
8288        final boolean selectionStarted = mSelectionActionMode != null;
8289
8290        if (selectionStarted && !mTextIsSelectable) {
8291            // Show the IME to be able to replace text, except when selecting non editable text.
8292            final InputMethodManager imm = InputMethodManager.peekInstance();
8293            if (imm != null) imm.showSoftInput(this, 0, null);
8294        }
8295
8296        return selectionStarted;
8297    }
8298
8299    private void stopSelectionActionMode() {
8300        if (mSelectionActionMode != null) {
8301            // This will hide the mSelectionModifierCursorController
8302            mSelectionActionMode.finish();
8303        }
8304    }
8305
8306    /**
8307     * Paste clipboard content between min and max positions.
8308     */
8309    private void paste(int min, int max) {
8310        ClipboardManager clipboard =
8311            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8312        ClipData clip = clipboard.getPrimaryClip();
8313        if (clip != null) {
8314            boolean didfirst = false;
8315            for (int i=0; i<clip.getItemCount(); i++) {
8316                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
8317                if (paste != null) {
8318                    if (!didfirst) {
8319                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8320                        min = extractRangeStartFromLong(minMax);
8321                        max = extractRangeEndFromLong(minMax);
8322                        Selection.setSelection((Spannable) mText, max);
8323                        ((Editable) mText).replace(min, max, paste);
8324                    } else {
8325                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8326                        ((Editable) mText).insert(getSelectionEnd(), paste);
8327                    }
8328                }
8329            }
8330            stopSelectionActionMode();
8331            sLastCutOrCopyTime = 0;
8332        }
8333    }
8334
8335    private void setPrimaryClip(ClipData clip) {
8336        ClipboardManager clipboard = (ClipboardManager) getContext().
8337                getSystemService(Context.CLIPBOARD_SERVICE);
8338        clipboard.setPrimaryClip(clip);
8339        sLastCutOrCopyTime = SystemClock.uptimeMillis();
8340    }
8341
8342    /**
8343     * An ActionMode Callback class that is used to provide actions while in text selection mode.
8344     *
8345     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
8346     * on which of these this TextView supports.
8347     */
8348    private class SelectionActionModeCallback implements ActionMode.Callback {
8349
8350        @Override
8351        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
8352            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
8353
8354            mode.setTitle(mContext.getString(com.android.internal.R.string.textSelectionCABTitle));
8355            mode.setSubtitle(null);
8356
8357            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
8358                    setAlphabeticShortcut('a').
8359                    setShowAsAction(
8360                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8361
8362            if (canCut()) {
8363                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
8364                    setIcon(styledAttributes.getResourceId(
8365                            R.styleable.Theme_actionModeCutDrawable, 0)).
8366                    setAlphabeticShortcut('x').
8367                    setShowAsAction(
8368                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8369            }
8370
8371            if (canCopy()) {
8372                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
8373                    setIcon(styledAttributes.getResourceId(
8374                            R.styleable.Theme_actionModeCopyDrawable, 0)).
8375                    setAlphabeticShortcut('c').
8376                    setShowAsAction(
8377                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8378            }
8379
8380            if (canPaste()) {
8381                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
8382                        setIcon(styledAttributes.getResourceId(
8383                                R.styleable.Theme_actionModePasteDrawable, 0)).
8384                        setAlphabeticShortcut('v').
8385                        setShowAsAction(
8386                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8387            }
8388
8389            styledAttributes.recycle();
8390
8391            if (mCustomSelectionActionModeCallback != null) {
8392                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
8393                    // The custom mode can choose to cancel the action mode
8394                    return false;
8395                }
8396            }
8397
8398            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
8399                getSelectionController().show();
8400                return true;
8401            } else {
8402                return false;
8403            }
8404        }
8405
8406        @Override
8407        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
8408            if (mCustomSelectionActionModeCallback != null) {
8409                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
8410            }
8411            return true;
8412        }
8413
8414        @Override
8415        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
8416            if (mCustomSelectionActionModeCallback != null &&
8417                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
8418                return true;
8419            }
8420            return onTextContextMenuItem(item.getItemId());
8421        }
8422
8423        @Override
8424        public void onDestroyActionMode(ActionMode mode) {
8425            if (mCustomSelectionActionModeCallback != null) {
8426                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
8427            }
8428            Selection.setSelection((Spannable) mText, getSelectionEnd());
8429
8430            if (mSelectionModifierCursorController != null) {
8431                mSelectionModifierCursorController.hide();
8432            }
8433
8434            mSelectionActionMode = null;
8435        }
8436    }
8437
8438    private class PastePopupMenu implements OnClickListener {
8439        private final PopupWindow mContainer;
8440        private int mPositionX;
8441        private int mPositionY;
8442        private final View[] mPasteViews = new View[4];
8443        private final int[] mPasteViewLayouts = new int[] {
8444                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
8445                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
8446
8447        public PastePopupMenu() {
8448            mContainer = new PopupWindow(TextView.this.mContext, null,
8449                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8450            mContainer.setSplitTouchEnabled(true);
8451            mContainer.setClippingEnabled(false);
8452            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8453
8454            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8455            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8456        }
8457
8458        private int viewIndex(boolean onTop) {
8459            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
8460        }
8461
8462        private void updateContent(boolean onTop) {
8463            final int viewIndex = viewIndex(onTop);
8464            View view = mPasteViews[viewIndex];
8465
8466            if (view == null) {
8467                final int layout = mPasteViewLayouts[viewIndex];
8468                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8469                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8470                if (inflater != null) {
8471                    view = inflater.inflate(layout, null);
8472                }
8473
8474                if (view == null) {
8475                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
8476                }
8477
8478                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8479                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8480                        ViewGroup.LayoutParams.WRAP_CONTENT));
8481                view.measure(size, size);
8482
8483                view.setOnClickListener(this);
8484
8485                mPasteViews[viewIndex] = view;
8486            }
8487
8488            mContainer.setContentView(view);
8489        }
8490
8491        public void show() {
8492            updateContent(true);
8493            positionAtCursor();
8494        }
8495
8496        public void hide() {
8497            mContainer.dismiss();
8498        }
8499
8500        public boolean isShowing() {
8501            return mContainer.isShowing();
8502        }
8503
8504        @Override
8505        public void onClick(View v) {
8506            if (canPaste()) {
8507                paste(getSelectionStart(), getSelectionEnd());
8508            }
8509            hide();
8510        }
8511
8512        void positionAtCursor() {
8513            View contentView = mContainer.getContentView();
8514            int width = contentView.getMeasuredWidth();
8515            int height = contentView.getMeasuredHeight();
8516            final int offset = TextView.this.getSelectionStart();
8517            final int line = mLayout.getLineForOffset(offset);
8518            final int lineTop = mLayout.getLineTop(line);
8519            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
8520
8521            final Rect bounds = sCursorControllerTempRect;
8522            bounds.left = (int) (primaryHorizontal - width / 2.0f);
8523            bounds.top = lineTop - height;
8524
8525            bounds.right = bounds.left + width;
8526            bounds.bottom = bounds.top + height;
8527
8528            convertFromViewportToContentCoordinates(bounds);
8529
8530            mPositionX = bounds.left;
8531            mPositionY = bounds.top;
8532
8533
8534            final int[] coords = mTempCoords;
8535            TextView.this.getLocationInWindow(coords);
8536            coords[0] += mPositionX;
8537            coords[1] += mPositionY;
8538
8539            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
8540            if (coords[1] < 0) {
8541                updateContent(false);
8542                // Update dimensions from new view
8543                contentView = mContainer.getContentView();
8544                width = contentView.getMeasuredWidth();
8545                height = contentView.getMeasuredHeight();
8546
8547                // Vertical clipping, move under edited line and to the side of insertion cursor
8548                // TODO bottom clipping in case there is no system bar
8549                coords[1] += height;
8550                final int lineBottom = mLayout.getLineBottom(line);
8551                final int lineHeight = lineBottom - lineTop;
8552                coords[1] += lineHeight;
8553
8554                // Move to right hand side of insertion cursor by default. TODO RTL text.
8555                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
8556                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
8557
8558                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
8559                    coords[0] += handleHalfWidth + width / 2;
8560                } else {
8561                    coords[0] -= handleHalfWidth + width / 2;
8562                }
8563            } else {
8564                // Horizontal clipping
8565                coords[0] = Math.max(0, coords[0]);
8566                coords[0] = Math.min(screenWidth - width, coords[0]);
8567            }
8568
8569            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
8570        }
8571    }
8572
8573    private abstract class HandleView extends View implements ViewTreeObserver.OnPreDrawListener {
8574        protected Drawable mDrawable;
8575        private final PopupWindow mContainer;
8576        // Position with respect to the parent TextView
8577        private int mPositionX, mPositionY;
8578        private boolean mIsDragging;
8579        // Offset from touch position to mPosition
8580        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
8581        protected float mHotspotX;
8582        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
8583        private float mTouchOffsetY;
8584        // Where the touch position should be on the handle to ensure a maximum cursor visibility
8585        private float mIdealVerticalOffset;
8586        // Parent's (TextView) position in window
8587        private int mLastParentX, mLastParentY;
8588        // PopupWindow container absolute position with respect to the enclosing window
8589        private int mContainerPositionX, mContainerPositionY;
8590        // Visible or not (scrolled off screen), whether or not this handle should be visible
8591        private boolean mIsActive = false;
8592
8593        public HandleView() {
8594            super(TextView.this.mContext);
8595            mContainer = new PopupWindow(TextView.this.mContext, null,
8596                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8597            mContainer.setSplitTouchEnabled(true);
8598            mContainer.setClippingEnabled(false);
8599            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8600            mContainer.setContentView(this);
8601
8602            initDrawable();
8603
8604            final int handleHeight = mDrawable.getIntrinsicHeight();
8605            mTouchOffsetY = -0.3f * handleHeight;
8606            mIdealVerticalOffset = 0.7f * handleHeight;
8607        }
8608
8609        protected abstract void initDrawable();
8610
8611        // Touch-up filter: number of previous positions remembered
8612        private static final int HISTORY_SIZE = 5;
8613        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
8614        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
8615        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
8616        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
8617        private int mPreviousOffsetIndex = 0;
8618        private int mNumberPreviousOffsets = 0;
8619
8620        private void startTouchUpFilter(int offset) {
8621            mNumberPreviousOffsets = 0;
8622            addPositionToTouchUpFilter(offset);
8623        }
8624
8625        private void addPositionToTouchUpFilter(int offset) {
8626            if (mNumberPreviousOffsets > 0 &&
8627                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
8628                // Make sure only actual changes of position are recorded.
8629                return;
8630            }
8631
8632            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
8633            mPreviousOffsets[mPreviousOffsetIndex] = offset;
8634            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
8635            mNumberPreviousOffsets++;
8636        }
8637
8638        private void filterOnTouchUp() {
8639            final long now = SystemClock.uptimeMillis();
8640            int i = 0;
8641            int index = mPreviousOffsetIndex;
8642            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
8643            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
8644                i++;
8645                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
8646            }
8647
8648            if (i > 0 && i < iMax &&
8649                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
8650                updateOffset(mPreviousOffsets[index]);
8651            }
8652        }
8653
8654        @Override
8655        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
8656            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
8657        }
8658
8659        public void show() {
8660            updateContainerPosition();
8661            if (isShowing()) {
8662                mContainer.update(mContainerPositionX, mContainerPositionY,
8663                        mRight - mLeft, mBottom - mTop);
8664
8665                hideAssociatedPopupWindow();
8666            } else {
8667                mContainer.showAtLocation(TextView.this, 0,
8668                        mContainerPositionX, mContainerPositionY);
8669
8670                mIsActive = true;
8671
8672                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8673                vto.addOnPreDrawListener(this);
8674            }
8675        }
8676
8677        protected void dismiss() {
8678            mIsDragging = false;
8679            mContainer.dismiss();
8680            hideAssociatedPopupWindow();
8681        }
8682
8683        public void hide() {
8684            dismiss();
8685
8686            mIsActive = false;
8687
8688            ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8689            vto.removeOnPreDrawListener(this);
8690        }
8691
8692        public boolean isShowing() {
8693            return mContainer.isShowing();
8694        }
8695
8696        private boolean isPositionVisible() {
8697            // Always show a dragging handle.
8698            if (mIsDragging) {
8699                return true;
8700            }
8701
8702            if (isInBatchEditMode()) {
8703                return false;
8704            }
8705
8706            final int extendedPaddingTop = getExtendedPaddingTop();
8707            final int extendedPaddingBottom = getExtendedPaddingBottom();
8708            final int compoundPaddingLeft = getCompoundPaddingLeft();
8709            final int compoundPaddingRight = getCompoundPaddingRight();
8710
8711            final TextView hostView = TextView.this;
8712
8713            if (mTempRect == null) mTempRect = new Rect();
8714            final Rect clip = mTempRect;
8715            clip.left = compoundPaddingLeft;
8716            clip.top = extendedPaddingTop;
8717            clip.right = hostView.getWidth() - compoundPaddingRight;
8718            clip.bottom = hostView.getHeight() - extendedPaddingBottom;
8719
8720            final ViewParent parent = hostView.getParent();
8721            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
8722                return false;
8723            }
8724
8725            final int[] coords = mTempCoords;
8726            hostView.getLocationInWindow(coords);
8727            final int posX = coords[0] + mPositionX + (int) mHotspotX;
8728            final int posY = coords[1] + mPositionY;
8729
8730            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
8731            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
8732                    posY >= clip.top && posY <= clip.bottom;
8733        }
8734
8735        private void moveTo(int x, int y) {
8736            mPositionX = x - TextView.this.mScrollX;
8737            mPositionY = y - TextView.this.mScrollY;
8738
8739            if (mIsDragging) {
8740                TextView.this.getLocationInWindow(mTempCoords);
8741                if (mTempCoords[0] != mLastParentX || mTempCoords[1] != mLastParentY) {
8742                    mTouchToWindowOffsetX += mTempCoords[0] - mLastParentX;
8743                    mTouchToWindowOffsetY += mTempCoords[1] - mLastParentY;
8744                    mLastParentX = mTempCoords[0];
8745                    mLastParentY = mTempCoords[1];
8746                }
8747
8748                hideAssociatedPopupWindow();
8749            }
8750        }
8751
8752        public abstract int getCurrentCursorOffset();
8753
8754        public abstract void updateOffset(int offset);
8755
8756        public abstract void updatePosition(int x, int y);
8757
8758        protected void positionAtCursorOffset(int offset) {
8759            addPositionToTouchUpFilter(offset);
8760            final int width = mDrawable.getIntrinsicWidth();
8761            final int height = mDrawable.getIntrinsicHeight();
8762            final int line = mLayout.getLineForOffset(offset);
8763            final int lineBottom = mLayout.getLineBottom(line);
8764
8765            final Rect bounds = sCursorControllerTempRect;
8766            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX) +
8767                    TextView.this.mScrollX;
8768            bounds.top = lineBottom + TextView.this.mScrollY;
8769
8770            bounds.right = bounds.left + width;
8771            bounds.bottom = bounds.top + height;
8772
8773            convertFromViewportToContentCoordinates(bounds);
8774            moveTo(bounds.left, bounds.top);
8775        }
8776
8777        /**
8778         * Updates the global container's position.
8779         * @return whether or not the position has actually changed
8780         */
8781        private boolean updateContainerPosition() {
8782            positionAtCursorOffset(getCurrentCursorOffset());
8783            TextView.this.getLocationInWindow(mTempCoords);
8784            final int containerPositionX = mTempCoords[0] + mPositionX;
8785            final int containerPositionY = mTempCoords[1] + mPositionY;
8786
8787            if (containerPositionX != mContainerPositionX ||
8788                containerPositionY != mContainerPositionY) {
8789                mContainerPositionX = containerPositionX;
8790                mContainerPositionY = containerPositionY;
8791                return true;
8792            }
8793            return false;
8794        }
8795
8796        public boolean onPreDraw() {
8797            if (updateContainerPosition()) {
8798                if (isPositionVisible()) {
8799                    mContainer.update(mContainerPositionX, mContainerPositionY,
8800                            mRight - mLeft, mBottom - mTop);
8801
8802                    if (mIsActive && !isShowing()) {
8803                        show();
8804                    }
8805                } else {
8806                    if (isShowing()) {
8807                        dismiss();
8808                    }
8809                }
8810
8811                // Hide paste popup as soon as the view is scrolled or moved
8812                hideAssociatedPopupWindow();
8813            }
8814            return true;
8815        }
8816
8817        @Override
8818        protected void onDraw(Canvas c) {
8819            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
8820            mDrawable.draw(c);
8821        }
8822
8823        @Override
8824        public boolean onTouchEvent(MotionEvent ev) {
8825            switch (ev.getActionMasked()) {
8826                case MotionEvent.ACTION_DOWN: {
8827                    startTouchUpFilter(getCurrentCursorOffset());
8828                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
8829                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
8830
8831                    final int[] coords = mTempCoords;
8832                    TextView.this.getLocationInWindow(coords);
8833                    mLastParentX = coords[0];
8834                    mLastParentY = coords[1];
8835                    mIsDragging = true;
8836                    break;
8837                }
8838
8839                case MotionEvent.ACTION_MOVE: {
8840                    final float rawX = ev.getRawX();
8841                    final float rawY = ev.getRawY();
8842
8843                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
8844                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
8845                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
8846                    float newVerticalOffset;
8847                    if (previousVerticalOffset < mIdealVerticalOffset) {
8848                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
8849                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
8850                    } else {
8851                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
8852                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
8853                    }
8854                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
8855
8856                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
8857                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
8858
8859                    updatePosition(Math.round(newPosX), Math.round(newPosY));
8860                    break;
8861                }
8862
8863                case MotionEvent.ACTION_UP:
8864                    filterOnTouchUp();
8865                    mIsDragging = false;
8866                    break;
8867
8868                case MotionEvent.ACTION_CANCEL:
8869                    mIsDragging = false;
8870                    break;
8871            }
8872            return true;
8873        }
8874
8875        public boolean isDragging() {
8876            return mIsDragging;
8877        }
8878
8879        void hideAssociatedPopupWindow() {
8880            // No associated popup window by default
8881        }
8882
8883        public void onDetached() {
8884            // Should be overriden to clean possible Runnable
8885        }
8886    }
8887
8888    private class InsertionHandleView extends HandleView {
8889        private static final int DELAY_BEFORE_FADE_OUT = 4000;
8890        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
8891
8892        // Used to detect taps on the insertion handle, which will affect the PastePopupMenu
8893        private long mTouchTimer;
8894        private float mDownPositionX, mDownPositionY;
8895        private PastePopupMenu mPastePopupWindow;
8896        private Runnable mHider;
8897        private Runnable mPastePopupShower;
8898
8899        public InsertionHandleView() {
8900            super();
8901        }
8902
8903        @Override
8904        public void show() {
8905            super.show();
8906            hideDelayed();
8907            removePastePopupCallback();
8908        }
8909
8910        public void show(int delayBeforePaste) {
8911            show();
8912
8913            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
8914            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
8915                delayBeforePaste = 0;
8916            }
8917            if (delayBeforePaste == 0 || canPaste()) {
8918                if (mPastePopupShower == null) {
8919                    mPastePopupShower = new Runnable() {
8920                        public void run() {
8921                            showAssociatedPopupWindow();
8922                        }
8923                    };
8924                }
8925                postDelayed(mPastePopupShower, delayBeforePaste);
8926            }
8927        }
8928
8929        @Override
8930        protected void dismiss() {
8931            super.dismiss();
8932            onDetached();
8933        }
8934
8935        @Override
8936        public void hide() {
8937            super.hide();
8938        }
8939
8940        private void hideDelayed() {
8941            removeHiderCallback();
8942            if (mHider == null) {
8943                mHider = new Runnable() {
8944                    public void run() {
8945                        hide();
8946                    }
8947                };
8948            }
8949            postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
8950        }
8951
8952        private void removePastePopupCallback() {
8953            if (mPastePopupShower != null) {
8954                removeCallbacks(mPastePopupShower);
8955            }
8956        }
8957
8958        private void removeHiderCallback() {
8959            if (mHider != null) {
8960                removeCallbacks(mHider);
8961            }
8962        }
8963
8964        @Override
8965        protected void initDrawable() {
8966            if (mSelectHandleCenter == null) {
8967                mSelectHandleCenter = mContext.getResources().getDrawable(
8968                        mTextSelectHandleRes);
8969            }
8970            mDrawable = mSelectHandleCenter;
8971            mHotspotX = mDrawable.getIntrinsicWidth() / 2.0f;
8972        }
8973
8974        @Override
8975        public boolean onTouchEvent(MotionEvent ev) {
8976            final boolean result = super.onTouchEvent(ev);
8977
8978            switch (ev.getActionMasked()) {
8979                case MotionEvent.ACTION_DOWN:
8980                    mDownPositionX = ev.getRawX();
8981                    mDownPositionY = ev.getRawY();
8982                    mTouchTimer = SystemClock.uptimeMillis();
8983                    break;
8984
8985                case MotionEvent.ACTION_UP:
8986                    long delay = SystemClock.uptimeMillis() - mTouchTimer;
8987                    if (delay < ViewConfiguration.getTapTimeout()) {
8988                        final float deltaX = mDownPositionX - ev.getRawX();
8989                        final float deltaY = mDownPositionY - ev.getRawY();
8990                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
8991                        if (distanceSquared < mSquaredTouchSlopDistance) {
8992                            if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
8993                                // Tapping on the handle dismisses the displayed paste view,
8994                                mPastePopupWindow.hide();
8995                            } else {
8996                                show(0);
8997                            }
8998                        }
8999                    }
9000                    break;
9001
9002                default:
9003                    break;
9004            }
9005
9006            return result;
9007        }
9008
9009        @Override
9010        public int getCurrentCursorOffset() {
9011            return TextView.this.getSelectionStart();
9012        }
9013
9014        @Override
9015        public void updateOffset(int offset) {
9016            Selection.setSelection((Spannable) mText, offset);
9017            positionAtCursorOffset(offset);
9018        }
9019
9020        @Override
9021        public void updatePosition(int x, int y) {
9022            final int previousOffset = getCurrentCursorOffset();
9023            final int newOffset = getOffset(x, y);
9024
9025            if (newOffset != previousOffset) {
9026                updateOffset(newOffset);
9027                removePastePopupCallback();
9028            }
9029            hideDelayed();
9030        }
9031
9032        void showAssociatedPopupWindow() {
9033            if (mPastePopupWindow == null) {
9034                // Lazy initialisation: create when actually shown only.
9035                mPastePopupWindow = new PastePopupMenu();
9036            }
9037            mPastePopupWindow.show();
9038        }
9039
9040        @Override
9041        void hideAssociatedPopupWindow() {
9042            if (mPastePopupWindow != null) {
9043                mPastePopupWindow.hide();
9044            }
9045        }
9046
9047        @Override
9048        public void onDetached() {
9049            removeHiderCallback();
9050            removePastePopupCallback();
9051        }
9052    }
9053
9054    private class SelectionStartHandleView extends HandleView {
9055        public SelectionStartHandleView() {
9056            super();
9057        }
9058
9059        @Override
9060        protected void initDrawable() {
9061            if (mSelectHandleLeft == null) {
9062                mSelectHandleLeft = mContext.getResources().getDrawable(
9063                        mTextSelectHandleLeftRes);
9064            }
9065            mDrawable = mSelectHandleLeft;
9066            mHotspotX = mDrawable.getIntrinsicWidth() * 3.0f / 4.0f;
9067        }
9068
9069        @Override
9070        public int getCurrentCursorOffset() {
9071            return TextView.this.getSelectionStart();
9072        }
9073
9074        @Override
9075        public void updateOffset(int offset) {
9076            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
9077            positionAtCursorOffset(offset);
9078        }
9079
9080        @Override
9081        public void updatePosition(int x, int y) {
9082            final int selectionStart = getSelectionStart();
9083            final int selectionEnd = getSelectionEnd();
9084
9085            int offset = getOffset(x, y);
9086
9087            // No need to redraw when the offset is unchanged
9088            if (offset == selectionStart) return;
9089            // Handles can not cross and selection is at least one character
9090            if (offset >= selectionEnd) offset = selectionEnd - 1;
9091
9092            Selection.setSelection((Spannable) mText, offset, selectionEnd);
9093            positionAtCursorOffset(offset);
9094        }
9095    }
9096
9097    private class SelectionEndHandleView extends HandleView {
9098        public SelectionEndHandleView() {
9099            super();
9100        }
9101
9102        @Override
9103        protected void initDrawable() {
9104            if (mSelectHandleRight == null) {
9105                mSelectHandleRight = mContext.getResources().getDrawable(
9106                        mTextSelectHandleRightRes);
9107            }
9108            mDrawable = mSelectHandleRight;
9109            mHotspotX = mDrawable.getIntrinsicWidth() / 4.0f;
9110        }
9111
9112        @Override
9113        public int getCurrentCursorOffset() {
9114            return TextView.this.getSelectionEnd();
9115        }
9116
9117        @Override
9118        public void updateOffset(int offset) {
9119            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
9120            positionAtCursorOffset(offset);
9121        }
9122
9123        @Override
9124        public void updatePosition(int x, int y) {
9125            final int selectionStart = getSelectionStart();
9126            final int selectionEnd = getSelectionEnd();
9127
9128            int offset = getOffset(x, y);
9129
9130            // No need to redraw when the offset is unchanged
9131            if (offset == selectionEnd) return;
9132            // Handles can not cross and selection is at least one character
9133            if (offset <= selectionStart) offset = selectionStart + 1;
9134
9135            Selection.setSelection((Spannable) mText, selectionStart, offset);
9136            positionAtCursorOffset(offset);
9137        }
9138    }
9139
9140    /**
9141     * A CursorController instance can be used to control a cursor in the text.
9142     * It is not used outside of {@link TextView}.
9143     * @hide
9144     */
9145    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
9146        /**
9147         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
9148         * See also {@link #hide()}.
9149         */
9150        public void show();
9151
9152        /**
9153         * Hide the cursor controller from screen.
9154         * See also {@link #show()}.
9155         */
9156        public void hide();
9157
9158        /**
9159         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
9160         * a chance to become active and/or visible.
9161         * @param event The touch event
9162         */
9163        public boolean onTouchEvent(MotionEvent event);
9164
9165        /**
9166         * Called when the view is detached from window. Perform house keeping task, such as
9167         * stopping Runnable thread that would otherwise keep a reference on the context, thus
9168         * preventing the activity from being recycled.
9169         */
9170        public void onDetached();
9171    }
9172
9173    private class InsertionPointCursorController implements CursorController {
9174        private static final int DELAY_BEFORE_PASTE = 2000;
9175
9176        private InsertionHandleView mHandle;
9177
9178        public void show() {
9179            ((InsertionHandleView) getHandle()).show(DELAY_BEFORE_PASTE);
9180        }
9181
9182        public void showWithPaste() {
9183            ((InsertionHandleView) getHandle()).show(0);
9184        }
9185
9186        public void hide() {
9187            if (mHandle != null) {
9188                mHandle.hide();
9189            }
9190        }
9191
9192        public boolean onTouchEvent(MotionEvent ev) {
9193            return false;
9194        }
9195
9196        public void onTouchModeChanged(boolean isInTouchMode) {
9197            if (!isInTouchMode) {
9198                hide();
9199            }
9200        }
9201
9202        private HandleView getHandle() {
9203            if (mHandle == null) {
9204                mHandle = new InsertionHandleView();
9205            }
9206            return mHandle;
9207        }
9208
9209        @Override
9210        public void onDetached() {
9211            if (mHandle != null) mHandle.onDetached();
9212        }
9213    }
9214
9215    private class SelectionModifierCursorController implements CursorController {
9216        // The cursor controller handles, lazily created when shown.
9217        private SelectionStartHandleView mStartHandle;
9218        private SelectionEndHandleView mEndHandle;
9219        // The offsets of that last touch down event. Remembered to start selection there.
9220        private int mMinTouchOffset, mMaxTouchOffset;
9221
9222        // Double tap detection
9223        private long mPreviousTapUpTime = 0;
9224        private int mPreviousTapPositionX, mPreviousTapPositionY;
9225
9226        SelectionModifierCursorController() {
9227            resetTouchOffsets();
9228        }
9229
9230        public void show() {
9231            if (isInBatchEditMode()) {
9232                return;
9233            }
9234
9235            // Lazy object creation has to be done before updatePosition() is called.
9236            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
9237            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
9238
9239            mStartHandle.show();
9240            mEndHandle.show();
9241
9242            hideInsertionPointCursorController();
9243        }
9244
9245        public void hide() {
9246            if (mStartHandle != null) mStartHandle.hide();
9247            if (mEndHandle != null) mEndHandle.hide();
9248        }
9249
9250        public boolean onTouchEvent(MotionEvent event) {
9251            // This is done even when the View does not have focus, so that long presses can start
9252            // selection and tap can move cursor from this tap position.
9253            if (isTextEditable() || mTextIsSelectable) {
9254                switch (event.getActionMasked()) {
9255                    case MotionEvent.ACTION_DOWN:
9256                        final int x = (int) event.getX();
9257                        final int y = (int) event.getY();
9258
9259                        // Remember finger down position, to be able to start selection from there
9260                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
9261
9262                        // Double tap detection
9263                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
9264                        if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
9265                                isPositionOnText(x, y)) {
9266                            final int deltaX = x - mPreviousTapPositionX;
9267                            final int deltaY = y - mPreviousTapPositionY;
9268                            final int distanceSquared = deltaX * deltaX + deltaY * deltaY;
9269                            if (distanceSquared < mSquaredTouchSlopDistance) {
9270                                startSelectionActionMode();
9271                                mDiscardNextActionUp = true;
9272                            }
9273                        }
9274
9275                        mPreviousTapPositionX = x;
9276                        mPreviousTapPositionY = y;
9277
9278                        break;
9279
9280                    case MotionEvent.ACTION_POINTER_DOWN:
9281                    case MotionEvent.ACTION_POINTER_UP:
9282                        // Handle multi-point gestures. Keep min and max offset positions.
9283                        // Only activated for devices that correctly handle multi-touch.
9284                        if (mContext.getPackageManager().hasSystemFeature(
9285                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
9286                            updateMinAndMaxOffsets(event);
9287                        }
9288                        break;
9289
9290                    case MotionEvent.ACTION_UP:
9291                        mPreviousTapUpTime = SystemClock.uptimeMillis();
9292                        break;
9293                }
9294            }
9295            return false;
9296        }
9297
9298        /**
9299         * @param event
9300         */
9301        private void updateMinAndMaxOffsets(MotionEvent event) {
9302            int pointerCount = event.getPointerCount();
9303            for (int index = 0; index < pointerCount; index++) {
9304                final int x = (int) event.getX(index);
9305                final int y = (int) event.getY(index);
9306                int offset = getOffset(x, y);
9307                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
9308                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
9309            }
9310        }
9311
9312        public int getMinTouchOffset() {
9313            return mMinTouchOffset;
9314        }
9315
9316        public int getMaxTouchOffset() {
9317            return mMaxTouchOffset;
9318        }
9319
9320        public void resetTouchOffsets() {
9321            mMinTouchOffset = mMaxTouchOffset = -1;
9322        }
9323
9324        /**
9325         * @return true iff this controller is currently used to move the selection start.
9326         */
9327        public boolean isSelectionStartDragged() {
9328            return mStartHandle != null && mStartHandle.isDragging();
9329        }
9330
9331        public void onTouchModeChanged(boolean isInTouchMode) {
9332            if (!isInTouchMode) {
9333                hide();
9334            }
9335        }
9336
9337        @Override
9338        public void onDetached() {
9339            if (mStartHandle != null) mStartHandle.onDetached();
9340            if (mEndHandle != null) mEndHandle.onDetached();
9341        }
9342    }
9343
9344    private void hideInsertionPointCursorController() {
9345        // No need to create the controller to hide it.
9346        if (mInsertionPointCursorController != null) {
9347            mInsertionPointCursorController.hide();
9348        }
9349    }
9350
9351    /**
9352     * Hides the insertion controller and stops text selection mode, hiding the selection controller
9353     */
9354    private void hideControllers() {
9355        hideInsertionPointCursorController();
9356        stopSelectionActionMode();
9357    }
9358
9359    /**
9360     * Get the offset character closest to the specified absolute position.
9361     *
9362     * @param x The horizontal absolute position of a point on screen
9363     * @param y The vertical absolute position of a point on screen
9364     * @return the character offset for the character whose position is closest to the specified
9365     *  position. Returns -1 if there is no layout.
9366     *
9367     * @hide
9368     */
9369    public int getOffset(int x, int y) {
9370        if (getLayout() == null) return -1;
9371        final int line = getLineAtCoordinate(y);
9372        final int offset = getOffsetAtCoordinate(line, x);
9373        return offset;
9374    }
9375
9376    private int convertToLocalHorizontalCoordinate(int x) {
9377        x -= getTotalPaddingLeft();
9378        // Clamp the position to inside of the view.
9379        x = Math.max(0, x);
9380        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9381        x += getScrollX();
9382        return x;
9383    }
9384
9385    private int getLineAtCoordinate(int y) {
9386        y -= getTotalPaddingTop();
9387        // Clamp the position to inside of the view.
9388        y = Math.max(0, y);
9389        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9390        y += getScrollY();
9391        return getLayout().getLineForVertical(y);
9392    }
9393
9394    private int getOffsetAtCoordinate(int line, int x) {
9395        x = convertToLocalHorizontalCoordinate(x);
9396        return getLayout().getOffsetForHorizontal(line, x);
9397    }
9398
9399    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
9400     * in the view. Returns false when the position is in the empty space of left/right of text.
9401     */
9402    private boolean isPositionOnText(int x, int y) {
9403        if (getLayout() == null) return false;
9404
9405        final int line = getLineAtCoordinate(y);
9406        x = convertToLocalHorizontalCoordinate(x);
9407
9408        if (x < getLayout().getLineLeft(line)) return false;
9409        if (x > getLayout().getLineRight(line)) return false;
9410        return true;
9411    }
9412
9413    @Override
9414    public boolean onDragEvent(DragEvent event) {
9415        switch (event.getAction()) {
9416            case DragEvent.ACTION_DRAG_STARTED:
9417                return hasInsertionController();
9418
9419            case DragEvent.ACTION_DRAG_ENTERED:
9420                TextView.this.requestFocus();
9421                return true;
9422
9423            case DragEvent.ACTION_DRAG_LOCATION:
9424                final int offset = getOffset((int) event.getX(), (int) event.getY());
9425                Selection.setSelection((Spannable)mText, offset);
9426                return true;
9427
9428            case DragEvent.ACTION_DROP:
9429                onDrop(event);
9430                return true;
9431
9432            case DragEvent.ACTION_DRAG_ENDED:
9433            case DragEvent.ACTION_DRAG_EXITED:
9434            default:
9435                return true;
9436        }
9437    }
9438
9439    private void onDrop(DragEvent event) {
9440        StringBuilder content = new StringBuilder("");
9441        ClipData clipData = event.getClipData();
9442        final int itemCount = clipData.getItemCount();
9443        for (int i=0; i < itemCount; i++) {
9444            Item item = clipData.getItemAt(i);
9445            content.append(item.coerceToText(TextView.this.mContext));
9446        }
9447
9448        final int offset = getOffset((int) event.getX(), (int) event.getY());
9449
9450        Object localState = event.getLocalState();
9451        DragLocalState dragLocalState = null;
9452        if (localState instanceof DragLocalState) {
9453            dragLocalState = (DragLocalState) localState;
9454        }
9455        boolean dragDropIntoItself = dragLocalState != null &&
9456                dragLocalState.sourceTextView == this;
9457
9458        if (dragDropIntoItself) {
9459            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
9460                // A drop inside the original selection discards the drop.
9461                return;
9462            }
9463        }
9464
9465        final int originalLength = mText.length();
9466        long minMax = prepareSpacesAroundPaste(offset, offset, content);
9467        int min = extractRangeStartFromLong(minMax);
9468        int max = extractRangeEndFromLong(minMax);
9469
9470        Selection.setSelection((Spannable) mText, max);
9471        ((Editable) mText).replace(min, max, content);
9472
9473        if (dragDropIntoItself) {
9474            int dragSourceStart = dragLocalState.start;
9475            int dragSourceEnd = dragLocalState.end;
9476            if (max <= dragSourceStart) {
9477                // Inserting text before selection has shifted positions
9478                final int shift = mText.length() - originalLength;
9479                dragSourceStart += shift;
9480                dragSourceEnd += shift;
9481            }
9482
9483            // Delete original selection
9484            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
9485
9486            // Make sure we do not leave two adjacent spaces.
9487            if ((dragSourceStart == 0 ||
9488                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
9489                    (dragSourceStart == mText.length() ||
9490                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
9491                final int pos = dragSourceStart == mText.length() ?
9492                        dragSourceStart - 1 : dragSourceStart;
9493                ((Editable) mText).delete(pos, pos + 1);
9494            }
9495        }
9496    }
9497
9498    /**
9499     * @return True if this view supports insertion handles.
9500     */
9501    boolean hasInsertionController() {
9502        return mInsertionControllerEnabled;
9503    }
9504
9505    /**
9506     * @return True if this view supports selection handles.
9507     */
9508    boolean hasSelectionController() {
9509        return mSelectionControllerEnabled;
9510    }
9511
9512    InsertionPointCursorController getInsertionController() {
9513        if (!mInsertionControllerEnabled) {
9514            return null;
9515        }
9516
9517        if (mInsertionPointCursorController == null) {
9518            mInsertionPointCursorController = new InsertionPointCursorController();
9519
9520            final ViewTreeObserver observer = getViewTreeObserver();
9521            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
9522        }
9523
9524        return mInsertionPointCursorController;
9525    }
9526
9527    SelectionModifierCursorController getSelectionController() {
9528        if (!mSelectionControllerEnabled) {
9529            return null;
9530        }
9531
9532        if (mSelectionModifierCursorController == null) {
9533            mSelectionModifierCursorController = new SelectionModifierCursorController();
9534
9535            final ViewTreeObserver observer = getViewTreeObserver();
9536            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
9537        }
9538
9539        return mSelectionModifierCursorController;
9540    }
9541
9542    boolean isInBatchEditMode() {
9543        final InputMethodState ims = mInputMethodState;
9544        if (ims != null) {
9545            return ims.mBatchEditNesting > 0;
9546        }
9547        return mInBatchEditControllers;
9548    }
9549
9550    @ViewDebug.ExportedProperty(category = "text")
9551    private CharSequence            mText;
9552    private CharSequence            mTransformed;
9553    private BufferType              mBufferType = BufferType.NORMAL;
9554
9555    private int                     mInputType = EditorInfo.TYPE_NULL;
9556    private CharSequence            mHint;
9557    private Layout                  mHintLayout;
9558
9559    private KeyListener             mInput;
9560
9561    private MovementMethod          mMovement;
9562    private TransformationMethod    mTransformation;
9563    private ChangeWatcher           mChangeWatcher;
9564
9565    private ArrayList<TextWatcher>  mListeners = null;
9566
9567    // display attributes
9568    private final TextPaint         mTextPaint;
9569    private boolean                 mUserSetTextScaleX;
9570    private final Paint             mHighlightPaint;
9571    private int                     mHighlightColor = 0xCC475925;
9572    /**
9573     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
9574     * this field being protected. Will be restored as private when lineHeight
9575     * feature request 3215097 is implemented
9576     * @hide
9577     */
9578    protected Layout                mLayout;
9579
9580    private long                    mShowCursor;
9581    private Blink                   mBlink;
9582    private boolean                 mCursorVisible = true;
9583
9584    // Cursor Controllers.
9585    private InsertionPointCursorController mInsertionPointCursorController;
9586    private SelectionModifierCursorController mSelectionModifierCursorController;
9587    private ActionMode              mSelectionActionMode;
9588    private boolean                 mInsertionControllerEnabled;
9589    private boolean                 mSelectionControllerEnabled;
9590    private boolean                 mInBatchEditControllers;
9591
9592    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
9593    // select from the current cursor position. Otherwise, select from long pressed position.
9594    private boolean                 mDPadCenterIsDown = false;
9595    private boolean                 mEnterKeyIsDown = false;
9596    private boolean                 mContextMenuTriggeredByKey = false;
9597    // Created once and shared by different CursorController helper methods.
9598    // Only one cursor controller is active at any time which prevent race conditions.
9599    private static Rect             sCursorControllerTempRect = new Rect();
9600
9601    private boolean                 mSelectAllOnFocus = false;
9602
9603    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
9604    private boolean                 mHorizontallyScrolling;
9605
9606    private int                     mAutoLinkMask;
9607    private boolean                 mLinksClickable = true;
9608
9609    private float                   mSpacingMult = 1;
9610    private float                   mSpacingAdd = 0;
9611    private boolean                 mTextIsSelectable = false;
9612
9613    private static final int        LINES = 1;
9614    private static final int        EMS = LINES;
9615    private static final int        PIXELS = 2;
9616
9617    private int                     mMaximum = Integer.MAX_VALUE;
9618    private int                     mMaxMode = LINES;
9619    private int                     mMinimum = 0;
9620    private int                     mMinMode = LINES;
9621
9622    private int                     mMaxWidth = Integer.MAX_VALUE;
9623    private int                     mMaxWidthMode = PIXELS;
9624    private int                     mMinWidth = 0;
9625    private int                     mMinWidthMode = PIXELS;
9626
9627    private boolean                 mSingleLine;
9628    private int                     mDesiredHeightAtMeasure = -1;
9629    private boolean                 mIncludePad = true;
9630
9631    // tmp primitives, so we don't alloc them on each draw
9632    private Path                    mHighlightPath;
9633    private boolean                 mHighlightPathBogus = true;
9634    private static final RectF      sTempRect = new RectF();
9635
9636    // XXX should be much larger
9637    private static final int        VERY_WIDE = 16384;
9638
9639    private static final int        BLINK = 500;
9640
9641    private static final int ANIMATED_SCROLL_GAP = 250;
9642    private long mLastScroll;
9643    private Scroller mScroller = null;
9644
9645    private BoringLayout.Metrics mBoring;
9646    private BoringLayout.Metrics mHintBoring;
9647
9648    private BoringLayout mSavedLayout, mSavedHintLayout;
9649
9650    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
9651    private InputFilter[] mFilters = NO_FILTERS;
9652    private static final Spanned EMPTY_SPANNED = new SpannedString("");
9653    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
9654    // System wide time for last cut or copy action.
9655    private static long sLastCutOrCopyTime;
9656    // Used to highlight a word when it is corrected by the IME
9657    private CorrectionHighlighter mCorrectionHighlighter;
9658    // New state used to change background based on whether this TextView is multiline.
9659    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
9660}
9661