TextView.java revision 8f34567c71003505456a9b1a0d461a4e62883d70 
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        updateCursorControllerPositions();
4503    }
4504
4505    private void updateCursorsPositions() {
4506        if (mCursorDrawableRes == 0) {
4507            mCursorCount = 0;
4508            return;
4509        }
4510
4511        final int offset = getSelectionStart();
4512        final int line = mLayout.getLineForOffset(offset);
4513        final int top = mLayout.getLineTop(line);
4514        final int bottom = mLayout.getLineTop(line + 1);
4515
4516        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4517
4518        int middle = bottom;
4519        if (mCursorCount == 2) {
4520            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4521            middle = (top + bottom) >> 1;
4522        }
4523
4524        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4525
4526        if (mCursorCount == 2) {
4527            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4528        }
4529    }
4530
4531    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4532        if (mCursorDrawable[cursorIndex] == null)
4533            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4534
4535        if (mTempRect == null) mTempRect = new Rect();
4536
4537        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4538        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4539        horizontal = Math.max(0.5f, horizontal - 0.5f);
4540        final int left = (int) (horizontal) - mTempRect.left;
4541        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4542                bottom + mTempRect.bottom);
4543    }
4544
4545    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4546        final boolean translate = cursorOffsetVertical != 0;
4547        if (translate) canvas.translate(0, cursorOffsetVertical);
4548        for (int i = 0; i < mCursorCount; i++) {
4549            mCursorDrawable[i].draw(canvas);
4550        }
4551        if (translate) canvas.translate(0, -cursorOffsetVertical);
4552    }
4553
4554    /**
4555     * Update the positions of the CursorControllers.  Needed by WebTextView,
4556     * which does not draw.
4557     * @hide
4558     */
4559    protected void updateCursorControllerPositions() {
4560        // No need to create the controllers if they were not already
4561        if (mInsertionPointCursorController != null &&
4562                mInsertionPointCursorController.isShowing()) {
4563            mInsertionPointCursorController.updatePosition();
4564        }
4565        if (mSelectionModifierCursorController != null &&
4566                mSelectionModifierCursorController.isShowing()) {
4567            mSelectionModifierCursorController.updatePosition();
4568        }
4569    }
4570
4571    @Override
4572    public void getFocusedRect(Rect r) {
4573        if (mLayout == null) {
4574            super.getFocusedRect(r);
4575            return;
4576        }
4577
4578        int sel = getSelectionEnd();
4579        if (sel < 0) {
4580            super.getFocusedRect(r);
4581            return;
4582        }
4583
4584        int line = mLayout.getLineForOffset(sel);
4585        r.top = mLayout.getLineTop(line);
4586        r.bottom = mLayout.getLineBottom(line);
4587
4588        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4589        r.right = r.left + 1;
4590
4591        // Adjust for padding and gravity.
4592        int paddingLeft = getCompoundPaddingLeft();
4593        int paddingTop = getExtendedPaddingTop();
4594        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4595            paddingTop += getVerticalOffset(false);
4596        }
4597        r.offset(paddingLeft, paddingTop);
4598    }
4599
4600    /**
4601     * Return the number of lines of text, or 0 if the internal Layout has not
4602     * been built.
4603     */
4604    public int getLineCount() {
4605        return mLayout != null ? mLayout.getLineCount() : 0;
4606    }
4607
4608    /**
4609     * Return the baseline for the specified line (0...getLineCount() - 1)
4610     * If bounds is not null, return the top, left, right, bottom extents
4611     * of the specified line in it. If the internal Layout has not been built,
4612     * return 0 and set bounds to (0, 0, 0, 0)
4613     * @param line which line to examine (0..getLineCount() - 1)
4614     * @param bounds Optional. If not null, it returns the extent of the line
4615     * @return the Y-coordinate of the baseline
4616     */
4617    public int getLineBounds(int line, Rect bounds) {
4618        if (mLayout == null) {
4619            if (bounds != null) {
4620                bounds.set(0, 0, 0, 0);
4621            }
4622            return 0;
4623        }
4624        else {
4625            int baseline = mLayout.getLineBounds(line, bounds);
4626
4627            int voffset = getExtendedPaddingTop();
4628            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4629                voffset += getVerticalOffset(true);
4630            }
4631            if (bounds != null) {
4632                bounds.offset(getCompoundPaddingLeft(), voffset);
4633            }
4634            return baseline + voffset;
4635        }
4636    }
4637
4638    @Override
4639    public int getBaseline() {
4640        if (mLayout == null) {
4641            return super.getBaseline();
4642        }
4643
4644        int voffset = 0;
4645        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4646            voffset = getVerticalOffset(true);
4647        }
4648
4649        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4650    }
4651
4652    @Override
4653    public boolean onKeyDown(int keyCode, KeyEvent event) {
4654        int which = doKeyDown(keyCode, event, null);
4655        if (which == 0) {
4656            // Go through default dispatching.
4657            return super.onKeyDown(keyCode, event);
4658        }
4659
4660        return true;
4661    }
4662
4663    @Override
4664    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4665        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4666
4667        int which = doKeyDown(keyCode, down, event);
4668        if (which == 0) {
4669            // Go through default dispatching.
4670            return super.onKeyMultiple(keyCode, repeatCount, event);
4671        }
4672        if (which == -1) {
4673            // Consumed the whole thing.
4674            return true;
4675        }
4676
4677        repeatCount--;
4678
4679        // We are going to dispatch the remaining events to either the input
4680        // or movement method.  To do this, we will just send a repeated stream
4681        // of down and up events until we have done the complete repeatCount.
4682        // It would be nice if those interfaces had an onKeyMultiple() method,
4683        // but adding that is a more complicated change.
4684        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4685        if (which == 1) {
4686            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4687            while (--repeatCount > 0) {
4688                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4689                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4690            }
4691            hideErrorIfUnchanged();
4692
4693        } else if (which == 2) {
4694            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4695            while (--repeatCount > 0) {
4696                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4697                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4698            }
4699        }
4700
4701        return true;
4702    }
4703
4704    /**
4705     * Returns true if pressing ENTER in this field advances focus instead
4706     * of inserting the character.  This is true mostly in single-line fields,
4707     * but also in mail addresses and subjects which will display on multiple
4708     * lines but where it doesn't make sense to insert newlines.
4709     */
4710    private boolean shouldAdvanceFocusOnEnter() {
4711        if (mInput == null) {
4712            return false;
4713        }
4714
4715        if (mSingleLine) {
4716            return true;
4717        }
4718
4719        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4720            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4721            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4722                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4723                return true;
4724            }
4725        }
4726
4727        return false;
4728    }
4729
4730    /**
4731     * Returns true if pressing TAB in this field advances focus instead
4732     * of inserting the character.  Insert tabs only in multi-line editors.
4733     */
4734    private boolean shouldAdvanceFocusOnTab() {
4735        if (mInput != null && !mSingleLine) {
4736            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4737                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4738                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4739                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4740                    return false;
4741                }
4742            }
4743        }
4744        return true;
4745    }
4746
4747    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4748        if (!isEnabled()) {
4749            return 0;
4750        }
4751
4752        switch (keyCode) {
4753            case KeyEvent.KEYCODE_ENTER:
4754                mEnterKeyIsDown = true;
4755                if (event.hasNoModifiers()) {
4756                    // When mInputContentType is set, we know that we are
4757                    // running in a "modern" cupcake environment, so don't need
4758                    // to worry about the application trying to capture
4759                    // enter key events.
4760                    if (mInputContentType != null) {
4761                        // If there is an action listener, given them a
4762                        // chance to consume the event.
4763                        if (mInputContentType.onEditorActionListener != null &&
4764                                mInputContentType.onEditorActionListener.onEditorAction(
4765                                this, EditorInfo.IME_NULL, event)) {
4766                            mInputContentType.enterDown = true;
4767                            // We are consuming the enter key for them.
4768                            return -1;
4769                        }
4770                    }
4771
4772                    // If our editor should move focus when enter is pressed, or
4773                    // this is a generated event from an IME action button, then
4774                    // don't let it be inserted into the text.
4775                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4776                            || shouldAdvanceFocusOnEnter()) {
4777                        if (mOnClickListener != null) {
4778                            return 0;
4779                        }
4780                        return -1;
4781                    }
4782                }
4783                break;
4784
4785            case KeyEvent.KEYCODE_DPAD_CENTER:
4786                mDPadCenterIsDown = true;
4787                if (event.hasNoModifiers()) {
4788                    if (shouldAdvanceFocusOnEnter()) {
4789                        return 0;
4790                    }
4791                }
4792                break;
4793
4794            case KeyEvent.KEYCODE_TAB:
4795                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
4796                    if (shouldAdvanceFocusOnTab()) {
4797                        return 0;
4798                    }
4799                }
4800                break;
4801
4802                // Has to be done on key down (and not on key up) to correctly be intercepted.
4803            case KeyEvent.KEYCODE_BACK:
4804                if (mSelectionActionMode != null) {
4805                    stopSelectionActionMode();
4806                    return -1;
4807                }
4808                break;
4809        }
4810
4811        if (mInput != null) {
4812            resetErrorChangedFlag();
4813
4814            boolean doDown = true;
4815            if (otherEvent != null) {
4816                try {
4817                    beginBatchEdit();
4818                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
4819                    hideErrorIfUnchanged();
4820                    doDown = false;
4821                    if (handled) {
4822                        return -1;
4823                    }
4824                } catch (AbstractMethodError e) {
4825                    // onKeyOther was added after 1.0, so if it isn't
4826                    // implemented we need to try to dispatch as a regular down.
4827                } finally {
4828                    endBatchEdit();
4829                }
4830            }
4831
4832            if (doDown) {
4833                beginBatchEdit();
4834                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
4835                endBatchEdit();
4836                hideErrorIfUnchanged();
4837                if (handled) return 1;
4838            }
4839        }
4840
4841        // bug 650865: sometimes we get a key event before a layout.
4842        // don't try to move around if we don't know the layout.
4843
4844        if (mMovement != null && mLayout != null) {
4845            boolean doDown = true;
4846            if (otherEvent != null) {
4847                try {
4848                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4849                            otherEvent);
4850                    doDown = false;
4851                    if (handled) {
4852                        return -1;
4853                    }
4854                } catch (AbstractMethodError e) {
4855                    // onKeyOther was added after 1.0, so if it isn't
4856                    // implemented we need to try to dispatch as a regular down.
4857                }
4858            }
4859            if (doDown) {
4860                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4861                    return 2;
4862            }
4863        }
4864
4865        return 0;
4866    }
4867
4868    /**
4869     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
4870     * can be recorded.
4871     * @hide
4872     */
4873    public void resetErrorChangedFlag() {
4874        /*
4875         * Keep track of what the error was before doing the input
4876         * so that if an input filter changed the error, we leave
4877         * that error showing.  Otherwise, we take down whatever
4878         * error was showing when the user types something.
4879         */
4880        mErrorWasChanged = false;
4881    }
4882
4883    /**
4884     * @hide
4885     */
4886    public void hideErrorIfUnchanged() {
4887        if (mError != null && !mErrorWasChanged) {
4888            setError(null, null);
4889        }
4890    }
4891
4892    @Override
4893    public boolean onKeyUp(int keyCode, KeyEvent event) {
4894        if (!isEnabled()) {
4895            return super.onKeyUp(keyCode, event);
4896        }
4897
4898        switch (keyCode) {
4899            case KeyEvent.KEYCODE_DPAD_CENTER:
4900                mDPadCenterIsDown = false;
4901                if (event.hasNoModifiers()) {
4902                    /*
4903                     * If there is a click listener, just call through to
4904                     * super, which will invoke it.
4905                     *
4906                     * If there isn't a click listener, try to show the soft
4907                     * input method.  (It will also
4908                     * call performClick(), but that won't do anything in
4909                     * this case.)
4910                     */
4911                    if (mOnClickListener == null) {
4912                        if (mMovement != null && mText instanceof Editable
4913                                && mLayout != null && onCheckIsTextEditor()) {
4914                            InputMethodManager imm = InputMethodManager.peekInstance();
4915                            if (imm != null) imm.showSoftInput(this, 0);
4916                        }
4917                    }
4918                }
4919                return super.onKeyUp(keyCode, event);
4920
4921            case KeyEvent.KEYCODE_ENTER:
4922                mEnterKeyIsDown = false;
4923                if (event.hasNoModifiers()) {
4924                    if (mInputContentType != null
4925                            && mInputContentType.onEditorActionListener != null
4926                            && mInputContentType.enterDown) {
4927                        mInputContentType.enterDown = false;
4928                        if (mInputContentType.onEditorActionListener.onEditorAction(
4929                                this, EditorInfo.IME_NULL, event)) {
4930                            return true;
4931                        }
4932                    }
4933
4934                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4935                            || shouldAdvanceFocusOnEnter()) {
4936                        /*
4937                         * If there is a click listener, just call through to
4938                         * super, which will invoke it.
4939                         *
4940                         * If there isn't a click listener, try to advance focus,
4941                         * but still call through to super, which will reset the
4942                         * pressed state and longpress state.  (It will also
4943                         * call performClick(), but that won't do anything in
4944                         * this case.)
4945                         */
4946                        if (mOnClickListener == null) {
4947                            View v = focusSearch(FOCUS_DOWN);
4948
4949                            if (v != null) {
4950                                if (!v.requestFocus(FOCUS_DOWN)) {
4951                                    throw new IllegalStateException(
4952                                            "focus search returned a view " +
4953                                            "that wasn't able to take focus!");
4954                                }
4955
4956                                /*
4957                                 * Return true because we handled the key; super
4958                                 * will return false because there was no click
4959                                 * listener.
4960                                 */
4961                                super.onKeyUp(keyCode, event);
4962                                return true;
4963                            } else if ((event.getFlags()
4964                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4965                                // No target for next focus, but make sure the IME
4966                                // if this came from it.
4967                                InputMethodManager imm = InputMethodManager.peekInstance();
4968                                if (imm != null && imm.isActive(this)) {
4969                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4970                                }
4971                            }
4972                        }
4973                    }
4974                    return super.onKeyUp(keyCode, event);
4975                }
4976                break;
4977        }
4978
4979        if (mInput != null)
4980            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4981                return true;
4982
4983        if (mMovement != null && mLayout != null)
4984            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4985                return true;
4986
4987        return super.onKeyUp(keyCode, event);
4988    }
4989
4990    @Override public boolean onCheckIsTextEditor() {
4991        return mInputType != EditorInfo.TYPE_NULL;
4992    }
4993
4994    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4995        if (onCheckIsTextEditor() && isEnabled()) {
4996            if (mInputMethodState == null) {
4997                mInputMethodState = new InputMethodState();
4998            }
4999            outAttrs.inputType = mInputType;
5000            if (mInputContentType != null) {
5001                outAttrs.imeOptions = mInputContentType.imeOptions;
5002                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5003                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5004                outAttrs.actionId = mInputContentType.imeActionId;
5005                outAttrs.extras = mInputContentType.extras;
5006            } else {
5007                outAttrs.imeOptions = EditorInfo.IME_NULL;
5008            }
5009            if (focusSearch(FOCUS_DOWN) != null) {
5010                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5011            }
5012            if (focusSearch(FOCUS_UP) != null) {
5013                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5014            }
5015            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5016                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5017                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5018                    // An action has not been set, but the enter key will move to
5019                    // the next focus, so set the action to that.
5020                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5021                } else {
5022                    // An action has not been set, and there is no focus to move
5023                    // to, so let's just supply a "done" action.
5024                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5025                }
5026                if (!shouldAdvanceFocusOnEnter()) {
5027                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5028                }
5029            }
5030            if (isMultilineInputType(outAttrs.inputType)) {
5031                // Multi-line text editors should always show an enter key.
5032                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5033            }
5034            outAttrs.hintText = mHint;
5035            if (mText instanceof Editable) {
5036                InputConnection ic = new EditableInputConnection(this);
5037                outAttrs.initialSelStart = getSelectionStart();
5038                outAttrs.initialSelEnd = getSelectionEnd();
5039                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5040                return ic;
5041            }
5042        }
5043        return null;
5044    }
5045
5046    /**
5047     * If this TextView contains editable content, extract a portion of it
5048     * based on the information in <var>request</var> in to <var>outText</var>.
5049     * @return Returns true if the text was successfully extracted, else false.
5050     */
5051    public boolean extractText(ExtractedTextRequest request,
5052            ExtractedText outText) {
5053        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5054                EXTRACT_UNKNOWN, outText);
5055    }
5056
5057    static final int EXTRACT_NOTHING = -2;
5058    static final int EXTRACT_UNKNOWN = -1;
5059
5060    boolean extractTextInternal(ExtractedTextRequest request,
5061            int partialStartOffset, int partialEndOffset, int delta,
5062            ExtractedText outText) {
5063        final CharSequence content = mText;
5064        if (content != null) {
5065            if (partialStartOffset != EXTRACT_NOTHING) {
5066                final int N = content.length();
5067                if (partialStartOffset < 0) {
5068                    outText.partialStartOffset = outText.partialEndOffset = -1;
5069                    partialStartOffset = 0;
5070                    partialEndOffset = N;
5071                } else {
5072                    // Now use the delta to determine the actual amount of text
5073                    // we need.
5074                    partialEndOffset += delta;
5075                    // Adjust offsets to ensure we contain full spans.
5076                    if (content instanceof Spanned) {
5077                        Spanned spanned = (Spanned)content;
5078                        Object[] spans = spanned.getSpans(partialStartOffset,
5079                                partialEndOffset, ParcelableSpan.class);
5080                        int i = spans.length;
5081                        while (i > 0) {
5082                            i--;
5083                            int j = spanned.getSpanStart(spans[i]);
5084                            if (j < partialStartOffset) partialStartOffset = j;
5085                            j = spanned.getSpanEnd(spans[i]);
5086                            if (j > partialEndOffset) partialEndOffset = j;
5087                        }
5088                    }
5089                    outText.partialStartOffset = partialStartOffset;
5090                    outText.partialEndOffset = partialEndOffset - delta;
5091
5092                    if (partialStartOffset > N) {
5093                        partialStartOffset = N;
5094                    } else if (partialStartOffset < 0) {
5095                        partialStartOffset = 0;
5096                    }
5097                    if (partialEndOffset > N) {
5098                        partialEndOffset = N;
5099                    } else if (partialEndOffset < 0) {
5100                        partialEndOffset = 0;
5101                    }
5102                }
5103                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5104                    outText.text = content.subSequence(partialStartOffset,
5105                            partialEndOffset);
5106                } else {
5107                    outText.text = TextUtils.substring(content, partialStartOffset,
5108                            partialEndOffset);
5109                }
5110            } else {
5111                outText.partialStartOffset = 0;
5112                outText.partialEndOffset = 0;
5113                outText.text = "";
5114            }
5115            outText.flags = 0;
5116            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5117                outText.flags |= ExtractedText.FLAG_SELECTING;
5118            }
5119            if (mSingleLine) {
5120                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5121            }
5122            outText.startOffset = 0;
5123            outText.selectionStart = getSelectionStart();
5124            outText.selectionEnd = getSelectionEnd();
5125            return true;
5126        }
5127        return false;
5128    }
5129
5130    boolean reportExtractedText() {
5131        final InputMethodState ims = mInputMethodState;
5132        if (ims != null) {
5133            final boolean contentChanged = ims.mContentChanged;
5134            if (contentChanged || ims.mSelectionModeChanged) {
5135                ims.mContentChanged = false;
5136                ims.mSelectionModeChanged = false;
5137                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5138                if (req != null) {
5139                    InputMethodManager imm = InputMethodManager.peekInstance();
5140                    if (imm != null) {
5141                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5142                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5143                                + " delta=" + ims.mChangedDelta);
5144                        if (ims.mChangedStart < 0 && !contentChanged) {
5145                            ims.mChangedStart = EXTRACT_NOTHING;
5146                        }
5147                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5148                                ims.mChangedDelta, ims.mTmpExtracted)) {
5149                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5150                                    + ims.mTmpExtracted.partialStartOffset
5151                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5152                                    + ": " + ims.mTmpExtracted.text);
5153                            imm.updateExtractedText(this, req.token,
5154                                    mInputMethodState.mTmpExtracted);
5155                            ims.mChangedStart = EXTRACT_UNKNOWN;
5156                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5157                            ims.mChangedDelta = 0;
5158                            ims.mContentChanged = false;
5159                            return true;
5160                        }
5161                    }
5162                }
5163            }
5164        }
5165        return false;
5166    }
5167
5168    /**
5169     * This is used to remove all style-impacting spans from text before new
5170     * extracted text is being replaced into it, so that we don't have any
5171     * lingering spans applied during the replace.
5172     */
5173    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5174        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5175        int i = spans.length;
5176        while (i > 0) {
5177            i--;
5178            spannable.removeSpan(spans[i]);
5179        }
5180    }
5181
5182    /**
5183     * Apply to this text view the given extracted text, as previously
5184     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5185     */
5186    public void setExtractedText(ExtractedText text) {
5187        Editable content = getEditableText();
5188        if (text.text != null) {
5189            if (content == null) {
5190                setText(text.text, TextView.BufferType.EDITABLE);
5191            } else if (text.partialStartOffset < 0) {
5192                removeParcelableSpans(content, 0, content.length());
5193                content.replace(0, content.length(), text.text);
5194            } else {
5195                final int N = content.length();
5196                int start = text.partialStartOffset;
5197                if (start > N) start = N;
5198                int end = text.partialEndOffset;
5199                if (end > N) end = N;
5200                removeParcelableSpans(content, start, end);
5201                content.replace(start, end, text.text);
5202            }
5203        }
5204
5205        // Now set the selection position...  make sure it is in range, to
5206        // avoid crashes.  If this is a partial update, it is possible that
5207        // the underlying text may have changed, causing us problems here.
5208        // Also we just don't want to trust clients to do the right thing.
5209        Spannable sp = (Spannable)getText();
5210        final int N = sp.length();
5211        int start = text.selectionStart;
5212        if (start < 0) start = 0;
5213        else if (start > N) start = N;
5214        int end = text.selectionEnd;
5215        if (end < 0) end = 0;
5216        else if (end > N) end = N;
5217        Selection.setSelection(sp, start, end);
5218
5219        // Finally, update the selection mode.
5220        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5221            MetaKeyKeyListener.startSelecting(this, sp);
5222        } else {
5223            MetaKeyKeyListener.stopSelecting(this, sp);
5224        }
5225    }
5226
5227    /**
5228     * @hide
5229     */
5230    public void setExtracting(ExtractedTextRequest req) {
5231        if (mInputMethodState != null) {
5232            mInputMethodState.mExtracting = req;
5233        }
5234        // This stops a possible text selection mode. Maybe not intended.
5235        hideControllers();
5236    }
5237
5238    /**
5239     * Called by the framework in response to a text completion from
5240     * the current input method, provided by it calling
5241     * {@link InputConnection#commitCompletion
5242     * InputConnection.commitCompletion()}.  The default implementation does
5243     * nothing; text views that are supporting auto-completion should override
5244     * this to do their desired behavior.
5245     *
5246     * @param text The auto complete text the user has selected.
5247     */
5248    public void onCommitCompletion(CompletionInfo text) {
5249    }
5250
5251    /**
5252     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5253     * a dictionnary) from the current input method, provided by it calling
5254     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5255     * implementation flashes the background of the corrected word to provide feedback to the user.
5256     *
5257     * @param info The auto correct info about the text that was corrected.
5258     */
5259    public void onCommitCorrection(CorrectionInfo info) {
5260        if (mCorrectionHighlighter == null) {
5261            mCorrectionHighlighter = new CorrectionHighlighter();
5262        } else {
5263            mCorrectionHighlighter.invalidate(false);
5264        }
5265
5266        mCorrectionHighlighter.highlight(info);
5267    }
5268
5269    private class CorrectionHighlighter {
5270        private final Path mPath = new Path();
5271        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5272        private int mStart, mEnd;
5273        private long mFadingStartTime;
5274        private final static int FADE_OUT_DURATION = 400;
5275
5276        public CorrectionHighlighter() {
5277            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5278            mPaint.setStyle(Paint.Style.FILL);
5279        }
5280
5281        public void highlight(CorrectionInfo info) {
5282            mStart = info.getOffset();
5283            mEnd = mStart + info.getNewText().length();
5284            mFadingStartTime = SystemClock.uptimeMillis();
5285
5286            if (mStart < 0 || mEnd < 0) {
5287                stopAnimation();
5288            }
5289        }
5290
5291        public void draw(Canvas canvas, int cursorOffsetVertical) {
5292            if (updatePath() && updatePaint()) {
5293                if (cursorOffsetVertical != 0) {
5294                    canvas.translate(0, cursorOffsetVertical);
5295                }
5296
5297                canvas.drawPath(mPath, mPaint);
5298
5299                if (cursorOffsetVertical != 0) {
5300                    canvas.translate(0, -cursorOffsetVertical);
5301                }
5302                invalidate(true);
5303            } else {
5304                stopAnimation();
5305                invalidate(false);
5306            }
5307        }
5308
5309        private boolean updatePaint() {
5310            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5311            if (duration > FADE_OUT_DURATION) return false;
5312
5313            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5314            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5315            final int color = (mHighlightColor & 0x00FFFFFF) +
5316                    ((int) (highlightColorAlpha * coef) << 24);
5317            mPaint.setColor(color);
5318            return true;
5319        }
5320
5321        private boolean updatePath() {
5322            final Layout layout = TextView.this.mLayout;
5323            if (layout == null) return false;
5324
5325            // Update in case text is edited while the animation is run
5326            final int length = mText.length();
5327            int start = Math.min(length, mStart);
5328            int end = Math.min(length, mEnd);
5329
5330            mPath.reset();
5331            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5332            return true;
5333        }
5334
5335        private void invalidate(boolean delayed) {
5336            if (TextView.this.mLayout == null) return;
5337
5338            synchronized (sTempRect) {
5339                mPath.computeBounds(sTempRect, false);
5340
5341                int left = getCompoundPaddingLeft();
5342                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5343
5344                if (delayed) {
5345                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5346                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5347                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5348                } else {
5349                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5350                            (int) sTempRect.right, (int) sTempRect.bottom);
5351                }
5352            }
5353        }
5354
5355        private void stopAnimation() {
5356            TextView.this.mCorrectionHighlighter = null;
5357        }
5358    }
5359
5360    public void beginBatchEdit() {
5361        mInBatchEditControllers = true;
5362        final InputMethodState ims = mInputMethodState;
5363        if (ims != null) {
5364            int nesting = ++ims.mBatchEditNesting;
5365            if (nesting == 1) {
5366                ims.mCursorChanged = false;
5367                ims.mChangedDelta = 0;
5368                if (ims.mContentChanged) {
5369                    // We already have a pending change from somewhere else,
5370                    // so turn this into a full update.
5371                    ims.mChangedStart = 0;
5372                    ims.mChangedEnd = mText.length();
5373                } else {
5374                    ims.mChangedStart = EXTRACT_UNKNOWN;
5375                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5376                    ims.mContentChanged = false;
5377                }
5378                onBeginBatchEdit();
5379            }
5380        }
5381    }
5382
5383    public void endBatchEdit() {
5384        mInBatchEditControllers = false;
5385        final InputMethodState ims = mInputMethodState;
5386        if (ims != null) {
5387            int nesting = --ims.mBatchEditNesting;
5388            if (nesting == 0) {
5389                finishBatchEdit(ims);
5390            }
5391        }
5392    }
5393
5394    void ensureEndedBatchEdit() {
5395        final InputMethodState ims = mInputMethodState;
5396        if (ims != null && ims.mBatchEditNesting != 0) {
5397            ims.mBatchEditNesting = 0;
5398            finishBatchEdit(ims);
5399        }
5400    }
5401
5402    void finishBatchEdit(final InputMethodState ims) {
5403        onEndBatchEdit();
5404
5405        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5406            updateAfterEdit();
5407            reportExtractedText();
5408        } else if (ims.mCursorChanged) {
5409            // Cheezy way to get us to report the current cursor location.
5410            invalidateCursor();
5411        }
5412    }
5413
5414    void updateAfterEdit() {
5415        invalidate();
5416        int curs = getSelectionStart();
5417
5418        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5419            registerForPreDraw();
5420        }
5421
5422        if (curs >= 0) {
5423            mHighlightPathBogus = true;
5424            makeBlink();
5425        }
5426
5427        checkForResize();
5428    }
5429
5430    /**
5431     * Called by the framework in response to a request to begin a batch
5432     * of edit operations through a call to link {@link #beginBatchEdit()}.
5433     */
5434    public void onBeginBatchEdit() {
5435    }
5436
5437    /**
5438     * Called by the framework in response to a request to end a batch
5439     * of edit operations through a call to link {@link #endBatchEdit}.
5440     */
5441    public void onEndBatchEdit() {
5442    }
5443
5444    /**
5445     * Called by the framework in response to a private command from the
5446     * current method, provided by it calling
5447     * {@link InputConnection#performPrivateCommand
5448     * InputConnection.performPrivateCommand()}.
5449     *
5450     * @param action The action name of the command.
5451     * @param data Any additional data for the command.  This may be null.
5452     * @return Return true if you handled the command, else false.
5453     */
5454    public boolean onPrivateIMECommand(String action, Bundle data) {
5455        return false;
5456    }
5457
5458    private void nullLayouts() {
5459        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5460            mSavedLayout = (BoringLayout) mLayout;
5461        }
5462        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5463            mSavedHintLayout = (BoringLayout) mHintLayout;
5464        }
5465
5466        mLayout = mHintLayout = null;
5467
5468        // Since it depends on the value of mLayout
5469        prepareCursorControllers();
5470    }
5471
5472    /**
5473     * Make a new Layout based on the already-measured size of the view,
5474     * on the assumption that it was measured correctly at some point.
5475     */
5476    private void assumeLayout() {
5477        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5478
5479        if (width < 1) {
5480            width = 0;
5481        }
5482
5483        int physicalWidth = width;
5484
5485        if (mHorizontallyScrolling) {
5486            width = VERY_WIDE;
5487        }
5488
5489        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5490                      physicalWidth, false);
5491    }
5492
5493    /**
5494     * The width passed in is now the desired layout width,
5495     * not the full view width with padding.
5496     * {@hide}
5497     */
5498    protected void makeNewLayout(int w, int hintWidth,
5499                                 BoringLayout.Metrics boring,
5500                                 BoringLayout.Metrics hintBoring,
5501                                 int ellipsisWidth, boolean bringIntoView) {
5502        stopMarquee();
5503
5504        mHighlightPathBogus = true;
5505
5506        if (w < 0) {
5507            w = 0;
5508        }
5509        if (hintWidth < 0) {
5510            hintWidth = 0;
5511        }
5512
5513        Layout.Alignment alignment;
5514        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
5515            case Gravity.CENTER_HORIZONTAL:
5516                alignment = Layout.Alignment.ALIGN_CENTER;
5517                break;
5518
5519            case Gravity.RIGHT:
5520                // Note, Layout resolves ALIGN_OPPOSITE to left or
5521                // right based on the paragraph direction.
5522                alignment = Layout.Alignment.ALIGN_OPPOSITE;
5523                break;
5524
5525            default:
5526                alignment = Layout.Alignment.ALIGN_NORMAL;
5527        }
5528
5529        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5530
5531        if (mText instanceof Spannable) {
5532            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5533                    alignment, mSpacingMult,
5534                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5535                    ellipsisWidth);
5536        } else {
5537            if (boring == UNKNOWN_BORING) {
5538                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5539                if (boring != null) {
5540                    mBoring = boring;
5541                }
5542            }
5543
5544            if (boring != null) {
5545                if (boring.width <= w &&
5546                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
5547                    if (mSavedLayout != null) {
5548                        mLayout = mSavedLayout.
5549                                replaceOrMake(mTransformed, mTextPaint,
5550                                w, alignment, mSpacingMult, mSpacingAdd,
5551                                boring, mIncludePad);
5552                    } else {
5553                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5554                                w, alignment, mSpacingMult, mSpacingAdd,
5555                                boring, mIncludePad);
5556                    }
5557
5558                    mSavedLayout = (BoringLayout) mLayout;
5559                } else if (shouldEllipsize && boring.width <= w) {
5560                    if (mSavedLayout != null) {
5561                        mLayout = mSavedLayout.
5562                                replaceOrMake(mTransformed, mTextPaint,
5563                                w, alignment, mSpacingMult, mSpacingAdd,
5564                                boring, mIncludePad, mEllipsize,
5565                                ellipsisWidth);
5566                    } else {
5567                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5568                                w, alignment, mSpacingMult, mSpacingAdd,
5569                                boring, mIncludePad, mEllipsize,
5570                                ellipsisWidth);
5571                    }
5572                } else if (shouldEllipsize) {
5573                    mLayout = new StaticLayout(mTransformed,
5574                                0, mTransformed.length(),
5575                                mTextPaint, w, alignment, mSpacingMult,
5576                                mSpacingAdd, mIncludePad, mEllipsize,
5577                                ellipsisWidth);
5578                } else {
5579                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5580                            w, alignment, mSpacingMult, mSpacingAdd,
5581                            mIncludePad);
5582                }
5583            } else if (shouldEllipsize) {
5584                mLayout = new StaticLayout(mTransformed,
5585                            0, mTransformed.length(),
5586                            mTextPaint, w, alignment, mSpacingMult,
5587                            mSpacingAdd, mIncludePad, mEllipsize,
5588                            ellipsisWidth);
5589            } else {
5590                mLayout = new StaticLayout(mTransformed, mTextPaint,
5591                        w, alignment, mSpacingMult, mSpacingAdd,
5592                        mIncludePad);
5593            }
5594        }
5595
5596        shouldEllipsize = mEllipsize != null;
5597        mHintLayout = null;
5598
5599        if (mHint != null) {
5600            if (shouldEllipsize) hintWidth = w;
5601
5602            if (hintBoring == UNKNOWN_BORING) {
5603                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5604                                                   mHintBoring);
5605                if (hintBoring != null) {
5606                    mHintBoring = hintBoring;
5607                }
5608            }
5609
5610            if (hintBoring != null) {
5611                if (hintBoring.width <= hintWidth &&
5612                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5613                    if (mSavedHintLayout != null) {
5614                        mHintLayout = mSavedHintLayout.
5615                                replaceOrMake(mHint, mTextPaint,
5616                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5617                                hintBoring, mIncludePad);
5618                    } else {
5619                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5620                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5621                                hintBoring, mIncludePad);
5622                    }
5623
5624                    mSavedHintLayout = (BoringLayout) mHintLayout;
5625                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5626                    if (mSavedHintLayout != null) {
5627                        mHintLayout = mSavedHintLayout.
5628                                replaceOrMake(mHint, mTextPaint,
5629                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5630                                hintBoring, mIncludePad, mEllipsize,
5631                                ellipsisWidth);
5632                    } else {
5633                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5634                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5635                                hintBoring, mIncludePad, mEllipsize,
5636                                ellipsisWidth);
5637                    }
5638                } else if (shouldEllipsize) {
5639                    mHintLayout = new StaticLayout(mHint,
5640                                0, mHint.length(),
5641                                mTextPaint, hintWidth, alignment, mSpacingMult,
5642                                mSpacingAdd, mIncludePad, mEllipsize,
5643                                ellipsisWidth);
5644                } else {
5645                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5646                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5647                            mIncludePad);
5648                }
5649            } else if (shouldEllipsize) {
5650                mHintLayout = new StaticLayout(mHint,
5651                            0, mHint.length(),
5652                            mTextPaint, hintWidth, alignment, mSpacingMult,
5653                            mSpacingAdd, mIncludePad, mEllipsize,
5654                            ellipsisWidth);
5655            } else {
5656                mHintLayout = new StaticLayout(mHint, mTextPaint,
5657                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5658                        mIncludePad);
5659            }
5660        }
5661
5662        if (bringIntoView) {
5663            registerForPreDraw();
5664        }
5665
5666        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5667            if (!compressText(ellipsisWidth)) {
5668                final int height = mLayoutParams.height;
5669                // If the size of the view does not depend on the size of the text, try to
5670                // start the marquee immediately
5671                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5672                    startMarquee();
5673                } else {
5674                    // Defer the start of the marquee until we know our width (see setFrame())
5675                    mRestartMarquee = true;
5676                }
5677            }
5678        }
5679
5680        // CursorControllers need a non-null mLayout
5681        prepareCursorControllers();
5682    }
5683
5684    private boolean compressText(float width) {
5685        if (isHardwareAccelerated()) return false;
5686
5687        // Only compress the text if it hasn't been compressed by the previous pass
5688        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5689                mTextPaint.getTextScaleX() == 1.0f) {
5690            final float textWidth = mLayout.getLineWidth(0);
5691            final float overflow = (textWidth + 1.0f - width) / width;
5692            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5693                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5694                post(new Runnable() {
5695                    public void run() {
5696                        requestLayout();
5697                    }
5698                });
5699                return true;
5700            }
5701        }
5702
5703        return false;
5704    }
5705
5706    private static int desired(Layout layout) {
5707        int n = layout.getLineCount();
5708        CharSequence text = layout.getText();
5709        float max = 0;
5710
5711        // if any line was wrapped, we can't use it.
5712        // but it's ok for the last line not to have a newline
5713
5714        for (int i = 0; i < n - 1; i++) {
5715            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5716                return -1;
5717        }
5718
5719        for (int i = 0; i < n; i++) {
5720            max = Math.max(max, layout.getLineWidth(i));
5721        }
5722
5723        return (int) FloatMath.ceil(max);
5724    }
5725
5726    /**
5727     * Set whether the TextView includes extra top and bottom padding to make
5728     * room for accents that go above the normal ascent and descent.
5729     * The default is true.
5730     *
5731     * @attr ref android.R.styleable#TextView_includeFontPadding
5732     */
5733    public void setIncludeFontPadding(boolean includepad) {
5734        mIncludePad = includepad;
5735
5736        if (mLayout != null) {
5737            nullLayouts();
5738            requestLayout();
5739            invalidate();
5740        }
5741    }
5742
5743    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5744
5745    @Override
5746    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5747        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5748        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5749        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5750        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5751
5752        int width;
5753        int height;
5754
5755        BoringLayout.Metrics boring = UNKNOWN_BORING;
5756        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5757
5758        int des = -1;
5759        boolean fromexisting = false;
5760
5761        if (widthMode == MeasureSpec.EXACTLY) {
5762            // Parent has told us how big to be. So be it.
5763            width = widthSize;
5764        } else {
5765            if (mLayout != null && mEllipsize == null) {
5766                des = desired(mLayout);
5767            }
5768
5769            if (des < 0) {
5770                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5771                if (boring != null) {
5772                    mBoring = boring;
5773                }
5774            } else {
5775                fromexisting = true;
5776            }
5777
5778            if (boring == null || boring == UNKNOWN_BORING) {
5779                if (des < 0) {
5780                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5781                }
5782
5783                width = des;
5784            } else {
5785                width = boring.width;
5786            }
5787
5788            final Drawables dr = mDrawables;
5789            if (dr != null) {
5790                width = Math.max(width, dr.mDrawableWidthTop);
5791                width = Math.max(width, dr.mDrawableWidthBottom);
5792            }
5793
5794            if (mHint != null) {
5795                int hintDes = -1;
5796                int hintWidth;
5797
5798                if (mHintLayout != null && mEllipsize == null) {
5799                    hintDes = desired(mHintLayout);
5800                }
5801
5802                if (hintDes < 0) {
5803                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5804                    if (hintBoring != null) {
5805                        mHintBoring = hintBoring;
5806                    }
5807                }
5808
5809                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5810                    if (hintDes < 0) {
5811                        hintDes = (int) FloatMath.ceil(
5812                                Layout.getDesiredWidth(mHint, mTextPaint));
5813                    }
5814
5815                    hintWidth = hintDes;
5816                } else {
5817                    hintWidth = hintBoring.width;
5818                }
5819
5820                if (hintWidth > width) {
5821                    width = hintWidth;
5822                }
5823            }
5824
5825            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5826
5827            if (mMaxWidthMode == EMS) {
5828                width = Math.min(width, mMaxWidth * getLineHeight());
5829            } else {
5830                width = Math.min(width, mMaxWidth);
5831            }
5832
5833            if (mMinWidthMode == EMS) {
5834                width = Math.max(width, mMinWidth * getLineHeight());
5835            } else {
5836                width = Math.max(width, mMinWidth);
5837            }
5838
5839            // Check against our minimum width
5840            width = Math.max(width, getSuggestedMinimumWidth());
5841
5842            if (widthMode == MeasureSpec.AT_MOST) {
5843                width = Math.min(widthSize, width);
5844            }
5845        }
5846
5847        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5848        int unpaddedWidth = want;
5849
5850        if (mHorizontallyScrolling) want = VERY_WIDE;
5851
5852        int hintWant = want;
5853        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5854
5855        if (mLayout == null) {
5856            makeNewLayout(want, hintWant, boring, hintBoring,
5857                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5858        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5859                   (mLayout.getEllipsizedWidth() !=
5860                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5861            if (mHint == null && mEllipsize == null &&
5862                    want > mLayout.getWidth() &&
5863                    (mLayout instanceof BoringLayout ||
5864                            (fromexisting && des >= 0 && des <= want))) {
5865                mLayout.increaseWidthTo(want);
5866            } else {
5867                makeNewLayout(want, hintWant, boring, hintBoring,
5868                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5869            }
5870        } else {
5871            // Width has not changed.
5872        }
5873
5874        if (heightMode == MeasureSpec.EXACTLY) {
5875            // Parent has told us how big to be. So be it.
5876            height = heightSize;
5877            mDesiredHeightAtMeasure = -1;
5878        } else {
5879            int desired = getDesiredHeight();
5880
5881            height = desired;
5882            mDesiredHeightAtMeasure = desired;
5883
5884            if (heightMode == MeasureSpec.AT_MOST) {
5885                height = Math.min(desired, heightSize);
5886            }
5887        }
5888
5889        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5890        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5891            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5892        }
5893
5894        /*
5895         * We didn't let makeNewLayout() register to bring the cursor into view,
5896         * so do it here if there is any possibility that it is needed.
5897         */
5898        if (mMovement != null ||
5899            mLayout.getWidth() > unpaddedWidth ||
5900            mLayout.getHeight() > unpaddedHeight) {
5901            registerForPreDraw();
5902        } else {
5903            scrollTo(0, 0);
5904        }
5905
5906        setMeasuredDimension(width, height);
5907    }
5908
5909    private int getDesiredHeight() {
5910        return Math.max(
5911                getDesiredHeight(mLayout, true),
5912                getDesiredHeight(mHintLayout, mEllipsize != null));
5913    }
5914
5915    private int getDesiredHeight(Layout layout, boolean cap) {
5916        if (layout == null) {
5917            return 0;
5918        }
5919
5920        int linecount = layout.getLineCount();
5921        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5922        int desired = layout.getLineTop(linecount);
5923
5924        final Drawables dr = mDrawables;
5925        if (dr != null) {
5926            desired = Math.max(desired, dr.mDrawableHeightLeft);
5927            desired = Math.max(desired, dr.mDrawableHeightRight);
5928        }
5929
5930        desired += pad;
5931        layout.setMaximumVisibleLineCount(0);
5932
5933        if (mMaxMode == LINES) {
5934            /*
5935             * Don't cap the hint to a certain number of lines.
5936             * (Do cap it, though, if we have a maximum pixel height.)
5937             */
5938            if (cap) {
5939                if (linecount > mMaximum) {
5940                    layout.setMaximumVisibleLineCount(mMaximum);
5941                    desired = layout.getLineTop(mMaximum);
5942
5943                    if (dr != null) {
5944                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5945                        desired = Math.max(desired, dr.mDrawableHeightRight);
5946                    }
5947
5948                    desired += pad;
5949                    linecount = mMaximum;
5950                }
5951            }
5952        } else {
5953            desired = Math.min(desired, mMaximum);
5954        }
5955
5956        if (mMinMode == LINES) {
5957            if (linecount < mMinimum) {
5958                desired += getLineHeight() * (mMinimum - linecount);
5959            }
5960        } else {
5961            desired = Math.max(desired, mMinimum);
5962        }
5963
5964        // Check against our minimum height
5965        desired = Math.max(desired, getSuggestedMinimumHeight());
5966
5967        return desired;
5968    }
5969
5970    /**
5971     * Check whether a change to the existing text layout requires a
5972     * new view layout.
5973     */
5974    private void checkForResize() {
5975        boolean sizeChanged = false;
5976
5977        if (mLayout != null) {
5978            // Check if our width changed
5979            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5980                sizeChanged = true;
5981                invalidate();
5982            }
5983
5984            // Check if our height changed
5985            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5986                int desiredHeight = getDesiredHeight();
5987
5988                if (desiredHeight != this.getHeight()) {
5989                    sizeChanged = true;
5990                }
5991            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5992                if (mDesiredHeightAtMeasure >= 0) {
5993                    int desiredHeight = getDesiredHeight();
5994
5995                    if (desiredHeight != mDesiredHeightAtMeasure) {
5996                        sizeChanged = true;
5997                    }
5998                }
5999            }
6000        }
6001
6002        if (sizeChanged) {
6003            requestLayout();
6004            // caller will have already invalidated
6005        }
6006    }
6007
6008    /**
6009     * Check whether entirely new text requires a new view layout
6010     * or merely a new text layout.
6011     */
6012    private void checkForRelayout() {
6013        // If we have a fixed width, we can just swap in a new text layout
6014        // if the text height stays the same or if the view height is fixed.
6015
6016        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6017                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6018                (mHint == null || mHintLayout != null) &&
6019                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6020            // Static width, so try making a new text layout.
6021
6022            int oldht = mLayout.getHeight();
6023            int want = mLayout.getWidth();
6024            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6025
6026            /*
6027             * No need to bring the text into view, since the size is not
6028             * changing (unless we do the requestLayout(), in which case it
6029             * will happen at measure).
6030             */
6031            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6032                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6033                          false);
6034
6035            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6036                // In a fixed-height view, so use our new text layout.
6037                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6038                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6039                    invalidate();
6040                    return;
6041                }
6042
6043                // Dynamic height, but height has stayed the same,
6044                // so use our new text layout.
6045                if (mLayout.getHeight() == oldht &&
6046                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6047                    invalidate();
6048                    return;
6049                }
6050            }
6051
6052            // We lose: the height has changed and we have a dynamic height.
6053            // Request a new view layout using our new text layout.
6054            requestLayout();
6055            invalidate();
6056        } else {
6057            // Dynamic width, so we have no choice but to request a new
6058            // view layout with a new text layout.
6059
6060            nullLayouts();
6061            requestLayout();
6062            invalidate();
6063        }
6064    }
6065
6066    /**
6067     * Returns true if anything changed.
6068     */
6069    private boolean bringTextIntoView() {
6070        int line = 0;
6071        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6072            line = mLayout.getLineCount() - 1;
6073        }
6074
6075        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6076        int dir = mLayout.getParagraphDirection(line);
6077        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6078        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6079        int ht = mLayout.getHeight();
6080
6081        int scrollx, scrolly;
6082
6083        if (a == Layout.Alignment.ALIGN_CENTER) {
6084            /*
6085             * Keep centered if possible, or, if it is too wide to fit,
6086             * keep leading edge in view.
6087             */
6088
6089            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6090            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6091
6092            if (right - left < hspace) {
6093                scrollx = (right + left) / 2 - hspace / 2;
6094            } else {
6095                if (dir < 0) {
6096                    scrollx = right - hspace;
6097                } else {
6098                    scrollx = left;
6099                }
6100            }
6101        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
6102            /*
6103             * Keep leading edge in view.
6104             */
6105
6106            if (dir < 0) {
6107                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6108                scrollx = right - hspace;
6109            } else {
6110                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6111            }
6112        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
6113            /*
6114             * Keep trailing edge in view.
6115             */
6116
6117            if (dir < 0) {
6118                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6119            } else {
6120                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6121                scrollx = right - hspace;
6122            }
6123        }
6124
6125        if (ht < vspace) {
6126            scrolly = 0;
6127        } else {
6128            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6129                scrolly = ht - vspace;
6130            } else {
6131                scrolly = 0;
6132            }
6133        }
6134
6135        if (scrollx != mScrollX || scrolly != mScrollY) {
6136            scrollTo(scrollx, scrolly);
6137            return true;
6138        } else {
6139            return false;
6140        }
6141    }
6142
6143    /**
6144     * Move the point, specified by the offset, into the view if it is needed.
6145     * This has to be called after layout. Returns true if anything changed.
6146     */
6147    public boolean bringPointIntoView(int offset) {
6148        boolean changed = false;
6149
6150        int line = mLayout.getLineForOffset(offset);
6151
6152        // FIXME: Is it okay to truncate this, or should we round?
6153        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6154        final int top = mLayout.getLineTop(line);
6155        final int bottom = mLayout.getLineTop(line + 1);
6156
6157        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6158        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6159        int ht = mLayout.getHeight();
6160
6161        int grav;
6162
6163        switch (mLayout.getParagraphAlignment(line)) {
6164            case ALIGN_NORMAL:
6165                grav = 1;
6166                break;
6167
6168            case ALIGN_OPPOSITE:
6169                grav = -1;
6170                break;
6171
6172            default:
6173                grav = 0;
6174        }
6175
6176        grav *= mLayout.getParagraphDirection(line);
6177
6178        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6179        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6180
6181        int hslack = (bottom - top) / 2;
6182        int vslack = hslack;
6183
6184        if (vslack > vspace / 4)
6185            vslack = vspace / 4;
6186        if (hslack > hspace / 4)
6187            hslack = hspace / 4;
6188
6189        int hs = mScrollX;
6190        int vs = mScrollY;
6191
6192        if (top - vs < vslack)
6193            vs = top - vslack;
6194        if (bottom - vs > vspace - vslack)
6195            vs = bottom - (vspace - vslack);
6196        if (ht - vs < vspace)
6197            vs = ht - vspace;
6198        if (0 - vs > 0)
6199            vs = 0;
6200
6201        if (grav != 0) {
6202            if (x - hs < hslack) {
6203                hs = x - hslack;
6204            }
6205            if (x - hs > hspace - hslack) {
6206                hs = x - (hspace - hslack);
6207            }
6208        }
6209
6210        if (grav < 0) {
6211            if (left - hs > 0)
6212                hs = left;
6213            if (right - hs < hspace)
6214                hs = right - hspace;
6215        } else if (grav > 0) {
6216            if (right - hs < hspace)
6217                hs = right - hspace;
6218            if (left - hs > 0)
6219                hs = left;
6220        } else /* grav == 0 */ {
6221            if (right - left <= hspace) {
6222                /*
6223                 * If the entire text fits, center it exactly.
6224                 */
6225                hs = left - (hspace - (right - left)) / 2;
6226            } else if (x > right - hslack) {
6227                /*
6228                 * If we are near the right edge, keep the right edge
6229                 * at the edge of the view.
6230                 */
6231                hs = right - hspace;
6232            } else if (x < left + hslack) {
6233                /*
6234                 * If we are near the left edge, keep the left edge
6235                 * at the edge of the view.
6236                 */
6237                hs = left;
6238            } else if (left > hs) {
6239                /*
6240                 * Is there whitespace visible at the left?  Fix it if so.
6241                 */
6242                hs = left;
6243            } else if (right < hs + hspace) {
6244                /*
6245                 * Is there whitespace visible at the right?  Fix it if so.
6246                 */
6247                hs = right - hspace;
6248            } else {
6249                /*
6250                 * Otherwise, float as needed.
6251                 */
6252                if (x - hs < hslack) {
6253                    hs = x - hslack;
6254                }
6255                if (x - hs > hspace - hslack) {
6256                    hs = x - (hspace - hslack);
6257                }
6258            }
6259        }
6260
6261        if (hs != mScrollX || vs != mScrollY) {
6262            if (mScroller == null) {
6263                scrollTo(hs, vs);
6264            } else {
6265                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6266                int dx = hs - mScrollX;
6267                int dy = vs - mScrollY;
6268
6269                if (duration > ANIMATED_SCROLL_GAP) {
6270                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6271                    awakenScrollBars(mScroller.getDuration());
6272                    invalidate();
6273                } else {
6274                    if (!mScroller.isFinished()) {
6275                        mScroller.abortAnimation();
6276                    }
6277
6278                    scrollBy(dx, dy);
6279                }
6280
6281                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6282            }
6283
6284            changed = true;
6285        }
6286
6287        if (isFocused()) {
6288            // This offsets because getInterestingRect() is in terms of
6289            // viewport coordinates, but requestRectangleOnScreen()
6290            // is in terms of content coordinates.
6291
6292            Rect r = new Rect(x, top, x + 1, bottom);
6293            getInterestingRect(r, line);
6294            r.offset(mScrollX, mScrollY);
6295
6296            if (requestRectangleOnScreen(r)) {
6297                changed = true;
6298            }
6299        }
6300
6301        return changed;
6302    }
6303
6304    /**
6305     * Move the cursor, if needed, so that it is at an offset that is visible
6306     * to the user.  This will not move the cursor if it represents more than
6307     * one character (a selection range).  This will only work if the
6308     * TextView contains spannable text; otherwise it will do nothing.
6309     *
6310     * @return True if the cursor was actually moved, false otherwise.
6311     */
6312    public boolean moveCursorToVisibleOffset() {
6313        if (!(mText instanceof Spannable)) {
6314            return false;
6315        }
6316        int start = getSelectionStart();
6317        int end = getSelectionEnd();
6318        if (start != end) {
6319            return false;
6320        }
6321
6322        // First: make sure the line is visible on screen:
6323
6324        int line = mLayout.getLineForOffset(start);
6325
6326        final int top = mLayout.getLineTop(line);
6327        final int bottom = mLayout.getLineTop(line + 1);
6328        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6329        int vslack = (bottom - top) / 2;
6330        if (vslack > vspace / 4)
6331            vslack = vspace / 4;
6332        final int vs = mScrollY;
6333
6334        if (top < (vs+vslack)) {
6335            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6336        } else if (bottom > (vspace+vs-vslack)) {
6337            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6338        }
6339
6340        // Next: make sure the character is visible on screen:
6341
6342        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6343        final int hs = mScrollX;
6344        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6345        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6346
6347        // line might contain bidirectional text
6348        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6349        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6350
6351        int newStart = start;
6352        if (newStart < lowChar) {
6353            newStart = lowChar;
6354        } else if (newStart > highChar) {
6355            newStart = highChar;
6356        }
6357
6358        if (newStart != start) {
6359            Selection.setSelection((Spannable)mText, newStart);
6360            return true;
6361        }
6362
6363        return false;
6364    }
6365
6366    @Override
6367    public void computeScroll() {
6368        if (mScroller != null) {
6369            if (mScroller.computeScrollOffset()) {
6370                mScrollX = mScroller.getCurrX();
6371                mScrollY = mScroller.getCurrY();
6372                invalidateParentCaches();
6373                postInvalidate();  // So we draw again
6374            }
6375        }
6376    }
6377
6378    private void getInterestingRect(Rect r, int line) {
6379        convertFromViewportToContentCoordinates(r);
6380
6381        // Rectangle can can be expanded on first and last line to take
6382        // padding into account.
6383        // TODO Take left/right padding into account too?
6384        if (line == 0) r.top -= getExtendedPaddingTop();
6385        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6386    }
6387
6388    private void convertFromViewportToContentCoordinates(Rect r) {
6389        final int horizontalOffset = viewportToContentHorizontalOffset();
6390        r.left += horizontalOffset;
6391        r.right += horizontalOffset;
6392
6393        final int verticalOffset = viewportToContentVerticalOffset();
6394        r.top += verticalOffset;
6395        r.bottom += verticalOffset;
6396    }
6397
6398    private int viewportToContentHorizontalOffset() {
6399        return getCompoundPaddingLeft() - mScrollX;
6400    }
6401
6402    private int viewportToContentVerticalOffset() {
6403        int offset = getExtendedPaddingTop() - mScrollY;
6404        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6405            offset += getVerticalOffset(false);
6406        }
6407        return offset;
6408    }
6409
6410    @Override
6411    public void debug(int depth) {
6412        super.debug(depth);
6413
6414        String output = debugIndent(depth);
6415        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6416                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6417                + "} ";
6418
6419        if (mText != null) {
6420
6421            output += "mText=\"" + mText + "\" ";
6422            if (mLayout != null) {
6423                output += "mLayout width=" + mLayout.getWidth()
6424                        + " height=" + mLayout.getHeight();
6425            }
6426        } else {
6427            output += "mText=NULL";
6428        }
6429        Log.d(VIEW_LOG_TAG, output);
6430    }
6431
6432    /**
6433     * Convenience for {@link Selection#getSelectionStart}.
6434     */
6435    @ViewDebug.ExportedProperty(category = "text")
6436    public int getSelectionStart() {
6437        return Selection.getSelectionStart(getText());
6438    }
6439
6440    /**
6441     * Convenience for {@link Selection#getSelectionEnd}.
6442     */
6443    @ViewDebug.ExportedProperty(category = "text")
6444    public int getSelectionEnd() {
6445        return Selection.getSelectionEnd(getText());
6446    }
6447
6448    /**
6449     * Return true iff there is a selection inside this text view.
6450     */
6451    public boolean hasSelection() {
6452        final int selectionStart = getSelectionStart();
6453        final int selectionEnd = getSelectionEnd();
6454
6455        return selectionStart >= 0 && selectionStart != selectionEnd;
6456    }
6457
6458    /**
6459     * Sets the properties of this field (lines, horizontally scrolling,
6460     * transformation method) to be for a single-line input.
6461     *
6462     * @attr ref android.R.styleable#TextView_singleLine
6463     */
6464    public void setSingleLine() {
6465        setSingleLine(true);
6466    }
6467
6468    /**
6469     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6470     * transformation method) to be for a single-line input; if false, restores these to the default
6471     * conditions.
6472     *
6473     * Note that the default conditions are not necessarily those that were in effect prior this
6474     * method, and you may want to reset these properties to your custom values.
6475     *
6476     * @attr ref android.R.styleable#TextView_singleLine
6477     */
6478    @android.view.RemotableViewMethod
6479    public void setSingleLine(boolean singleLine) {
6480        // Could be used, but may break backward compatibility.
6481        // if (mSingleLine == singleLine) return;
6482        setInputTypeSingleLine(singleLine);
6483        applySingleLine(singleLine, true, true);
6484    }
6485
6486    /**
6487     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6488     * @param singleLine
6489     */
6490    private void setInputTypeSingleLine(boolean singleLine) {
6491        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6492            if (singleLine) {
6493                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6494            } else {
6495                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6496            }
6497        }
6498    }
6499
6500    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6501            boolean changeMaxLines) {
6502        mSingleLine = singleLine;
6503        if (singleLine) {
6504            setLines(1);
6505            setHorizontallyScrolling(true);
6506            if (applyTransformation) {
6507                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6508            }
6509        } else {
6510            if (changeMaxLines) {
6511                setMaxLines(Integer.MAX_VALUE);
6512            }
6513            setHorizontallyScrolling(false);
6514            if (applyTransformation) {
6515                setTransformationMethod(null);
6516            }
6517        }
6518    }
6519
6520    /**
6521     * Causes words in the text that are longer than the view is wide
6522     * to be ellipsized instead of broken in the middle.  You may also
6523     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6524     * to constrain the text to a single line.  Use <code>null</code>
6525     * to turn off ellipsizing.
6526     *
6527     * @attr ref android.R.styleable#TextView_ellipsize
6528     */
6529    public void setEllipsize(TextUtils.TruncateAt where) {
6530        mEllipsize = where;
6531
6532        if (mLayout != null) {
6533            nullLayouts();
6534            requestLayout();
6535            invalidate();
6536        }
6537    }
6538
6539    /**
6540     * Sets how many times to repeat the marquee animation. Only applied if the
6541     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6542     *
6543     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6544     */
6545    public void setMarqueeRepeatLimit(int marqueeLimit) {
6546        mMarqueeRepeatLimit = marqueeLimit;
6547    }
6548
6549    /**
6550     * Returns where, if anywhere, words that are longer than the view
6551     * is wide should be ellipsized.
6552     */
6553    @ViewDebug.ExportedProperty
6554    public TextUtils.TruncateAt getEllipsize() {
6555        return mEllipsize;
6556    }
6557
6558    /**
6559     * Set the TextView so that when it takes focus, all the text is
6560     * selected.
6561     *
6562     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6563     */
6564    @android.view.RemotableViewMethod
6565    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6566        mSelectAllOnFocus = selectAllOnFocus;
6567
6568        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6569            setText(mText, BufferType.SPANNABLE);
6570        }
6571    }
6572
6573    /**
6574     * Set whether the cursor is visible.  The default is true.
6575     *
6576     * @attr ref android.R.styleable#TextView_cursorVisible
6577     */
6578    @android.view.RemotableViewMethod
6579    public void setCursorVisible(boolean visible) {
6580        if (mCursorVisible != visible) {
6581            mCursorVisible = visible;
6582            invalidate();
6583
6584            makeBlink();
6585
6586            // InsertionPointCursorController depends on mCursorVisible
6587            prepareCursorControllers();
6588        }
6589    }
6590
6591    private boolean isCursorVisible() {
6592        return mCursorVisible && isTextEditable();
6593    }
6594
6595    private boolean canMarquee() {
6596        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6597        return width > 0 && mLayout.getLineWidth(0) > width;
6598    }
6599
6600    private void startMarquee() {
6601        // Do not ellipsize EditText
6602        if (mInput != null) return;
6603
6604        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6605            return;
6606        }
6607
6608        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6609                getLineCount() == 1 && canMarquee()) {
6610
6611            if (mMarquee == null) mMarquee = new Marquee(this);
6612            mMarquee.start(mMarqueeRepeatLimit);
6613        }
6614    }
6615
6616    private void stopMarquee() {
6617        if (mMarquee != null && !mMarquee.isStopped()) {
6618            mMarquee.stop();
6619        }
6620    }
6621
6622    private void startStopMarquee(boolean start) {
6623        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6624            if (start) {
6625                startMarquee();
6626            } else {
6627                stopMarquee();
6628            }
6629        }
6630    }
6631
6632    private static final class Marquee extends Handler {
6633        // TODO: Add an option to configure this
6634        private static final float MARQUEE_DELTA_MAX = 0.07f;
6635        private static final int MARQUEE_DELAY = 1200;
6636        private static final int MARQUEE_RESTART_DELAY = 1200;
6637        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6638        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6639
6640        private static final byte MARQUEE_STOPPED = 0x0;
6641        private static final byte MARQUEE_STARTING = 0x1;
6642        private static final byte MARQUEE_RUNNING = 0x2;
6643
6644        private static final int MESSAGE_START = 0x1;
6645        private static final int MESSAGE_TICK = 0x2;
6646        private static final int MESSAGE_RESTART = 0x3;
6647
6648        private final WeakReference<TextView> mView;
6649
6650        private byte mStatus = MARQUEE_STOPPED;
6651        private final float mScrollUnit;
6652        private float mMaxScroll;
6653        float mMaxFadeScroll;
6654        private float mGhostStart;
6655        private float mGhostOffset;
6656        private float mFadeStop;
6657        private int mRepeatLimit;
6658
6659        float mScroll;
6660
6661        Marquee(TextView v) {
6662            final float density = v.getContext().getResources().getDisplayMetrics().density;
6663            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6664            mView = new WeakReference<TextView>(v);
6665        }
6666
6667        @Override
6668        public void handleMessage(Message msg) {
6669            switch (msg.what) {
6670                case MESSAGE_START:
6671                    mStatus = MARQUEE_RUNNING;
6672                    tick();
6673                    break;
6674                case MESSAGE_TICK:
6675                    tick();
6676                    break;
6677                case MESSAGE_RESTART:
6678                    if (mStatus == MARQUEE_RUNNING) {
6679                        if (mRepeatLimit >= 0) {
6680                            mRepeatLimit--;
6681                        }
6682                        start(mRepeatLimit);
6683                    }
6684                    break;
6685            }
6686        }
6687
6688        void tick() {
6689            if (mStatus != MARQUEE_RUNNING) {
6690                return;
6691            }
6692
6693            removeMessages(MESSAGE_TICK);
6694
6695            final TextView textView = mView.get();
6696            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6697                mScroll += mScrollUnit;
6698                if (mScroll > mMaxScroll) {
6699                    mScroll = mMaxScroll;
6700                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6701                } else {
6702                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6703                }
6704                textView.invalidate();
6705            }
6706        }
6707
6708        void stop() {
6709            mStatus = MARQUEE_STOPPED;
6710            removeMessages(MESSAGE_START);
6711            removeMessages(MESSAGE_RESTART);
6712            removeMessages(MESSAGE_TICK);
6713            resetScroll();
6714        }
6715
6716        private void resetScroll() {
6717            mScroll = 0.0f;
6718            final TextView textView = mView.get();
6719            if (textView != null) textView.invalidate();
6720        }
6721
6722        void start(int repeatLimit) {
6723            if (repeatLimit == 0) {
6724                stop();
6725                return;
6726            }
6727            mRepeatLimit = repeatLimit;
6728            final TextView textView = mView.get();
6729            if (textView != null && textView.mLayout != null) {
6730                mStatus = MARQUEE_STARTING;
6731                mScroll = 0.0f;
6732                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6733                        textView.getCompoundPaddingRight();
6734                final float lineWidth = textView.mLayout.getLineWidth(0);
6735                final float gap = textWidth / 3.0f;
6736                mGhostStart = lineWidth - textWidth + gap;
6737                mMaxScroll = mGhostStart + textWidth;
6738                mGhostOffset = lineWidth + gap;
6739                mFadeStop = lineWidth + textWidth / 6.0f;
6740                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6741
6742                textView.invalidate();
6743                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6744            }
6745        }
6746
6747        float getGhostOffset() {
6748            return mGhostOffset;
6749        }
6750
6751        boolean shouldDrawLeftFade() {
6752            return mScroll <= mFadeStop;
6753        }
6754
6755        boolean shouldDrawGhost() {
6756            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6757        }
6758
6759        boolean isRunning() {
6760            return mStatus == MARQUEE_RUNNING;
6761        }
6762
6763        boolean isStopped() {
6764            return mStatus == MARQUEE_STOPPED;
6765        }
6766    }
6767
6768    /**
6769     * This method is called when the text is changed, in case any
6770     * subclasses would like to know.
6771     *
6772     * @param text The text the TextView is displaying.
6773     * @param start The offset of the start of the range of the text
6774     *              that was modified.
6775     * @param before The offset of the former end of the range of the
6776     *               text that was modified.  If text was simply inserted,
6777     *               this will be the same as <code>start</code>.
6778     *               If text was replaced with new text or deleted, the
6779     *               length of the old text was <code>before-start</code>.
6780     * @param after The offset of the end of the range of the text
6781     *              that was modified.  If text was simply deleted,
6782     *              this will be the same as <code>start</code>.
6783     *              If text was replaced with new text or inserted,
6784     *              the length of the new text is <code>after-start</code>.
6785     */
6786    protected void onTextChanged(CharSequence text,
6787                                 int start, int before, int after) {
6788    }
6789
6790    /**
6791     * This method is called when the selection has changed, in case any
6792     * subclasses would like to know.
6793     *
6794     * @param selStart The new selection start location.
6795     * @param selEnd The new selection end location.
6796     */
6797    protected void onSelectionChanged(int selStart, int selEnd) {
6798    }
6799
6800    /**
6801     * Adds a TextWatcher to the list of those whose methods are called
6802     * whenever this TextView's text changes.
6803     * <p>
6804     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6805     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6806     * if there are any text changed listeners forces the buffer type to
6807     * Editable if it would not otherwise be and does call this method.
6808     */
6809    public void addTextChangedListener(TextWatcher watcher) {
6810        if (mListeners == null) {
6811            mListeners = new ArrayList<TextWatcher>();
6812        }
6813
6814        mListeners.add(watcher);
6815    }
6816
6817    /**
6818     * Removes the specified TextWatcher from the list of those whose
6819     * methods are called
6820     * whenever this TextView's text changes.
6821     */
6822    public void removeTextChangedListener(TextWatcher watcher) {
6823        if (mListeners != null) {
6824            int i = mListeners.indexOf(watcher);
6825
6826            if (i >= 0) {
6827                mListeners.remove(i);
6828            }
6829        }
6830    }
6831
6832    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6833                                   int after) {
6834        if (mListeners != null) {
6835            final ArrayList<TextWatcher> list = mListeners;
6836            final int count = list.size();
6837            for (int i = 0; i < count; i++) {
6838                list.get(i).beforeTextChanged(text, start, before, after);
6839            }
6840        }
6841    }
6842
6843    /**
6844     * Not private so it can be called from an inner class without going
6845     * through a thunk.
6846     */
6847    void sendOnTextChanged(CharSequence text, int start, int before,
6848                                   int after) {
6849        if (mListeners != null) {
6850            final ArrayList<TextWatcher> list = mListeners;
6851            final int count = list.size();
6852            for (int i = 0; i < count; i++) {
6853                list.get(i).onTextChanged(text, start, before, after);
6854            }
6855        }
6856    }
6857
6858    /**
6859     * Not private so it can be called from an inner class without going
6860     * through a thunk.
6861     */
6862    void sendAfterTextChanged(Editable text) {
6863        if (mListeners != null) {
6864            final ArrayList<TextWatcher> list = mListeners;
6865            final int count = list.size();
6866            for (int i = 0; i < count; i++) {
6867                list.get(i).afterTextChanged(text);
6868            }
6869        }
6870    }
6871
6872    /**
6873     * Not private so it can be called from an inner class without going
6874     * through a thunk.
6875     */
6876    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
6877        final InputMethodState ims = mInputMethodState;
6878        if (ims == null || ims.mBatchEditNesting == 0) {
6879            updateAfterEdit();
6880        }
6881        if (ims != null) {
6882            ims.mContentChanged = true;
6883            if (ims.mChangedStart < 0) {
6884                ims.mChangedStart = start;
6885                ims.mChangedEnd = start+before;
6886            } else {
6887                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6888                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6889            }
6890            ims.mChangedDelta += after-before;
6891        }
6892
6893        sendOnTextChanged(buffer, start, before, after);
6894        onTextChanged(buffer, start, before, after);
6895
6896        // Hide the controllers if the amount of content changed
6897        if (before != after) {
6898            hideControllers();
6899        }
6900    }
6901
6902    /**
6903     * Not private so it can be called from an inner class without going
6904     * through a thunk.
6905     */
6906    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
6907        // XXX Make the start and end move together if this ends up
6908        // spending too much time invalidating.
6909
6910        boolean selChanged = false;
6911        int newSelStart=-1, newSelEnd=-1;
6912
6913        final InputMethodState ims = mInputMethodState;
6914
6915        if (what == Selection.SELECTION_END) {
6916            mHighlightPathBogus = true;
6917            selChanged = true;
6918            newSelEnd = newStart;
6919
6920            if (!isFocused()) {
6921                mSelectionMoved = true;
6922            }
6923
6924            if (oldStart >= 0 || newStart >= 0) {
6925                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6926                registerForPreDraw();
6927                makeBlink();
6928            }
6929        }
6930
6931        if (what == Selection.SELECTION_START) {
6932            mHighlightPathBogus = true;
6933            selChanged = true;
6934            newSelStart = newStart;
6935
6936            if (!isFocused()) {
6937                mSelectionMoved = true;
6938            }
6939
6940            if (oldStart >= 0 || newStart >= 0) {
6941                int end = Selection.getSelectionEnd(buf);
6942                invalidateCursor(end, oldStart, newStart);
6943            }
6944        }
6945
6946        if (selChanged) {
6947            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6948                if (newSelStart < 0) {
6949                    newSelStart = Selection.getSelectionStart(buf);
6950                }
6951                if (newSelEnd < 0) {
6952                    newSelEnd = Selection.getSelectionEnd(buf);
6953                }
6954                onSelectionChanged(newSelStart, newSelEnd);
6955            }
6956        }
6957
6958        if (what instanceof UpdateAppearance ||
6959            what instanceof ParagraphStyle) {
6960            if (ims == null || ims.mBatchEditNesting == 0) {
6961                invalidate();
6962                mHighlightPathBogus = true;
6963                checkForResize();
6964            } else {
6965                ims.mContentChanged = true;
6966            }
6967        }
6968
6969        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6970            mHighlightPathBogus = true;
6971            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6972                ims.mSelectionModeChanged = true;
6973            }
6974
6975            if (Selection.getSelectionStart(buf) >= 0) {
6976                if (ims == null || ims.mBatchEditNesting == 0) {
6977                    invalidateCursor();
6978                } else {
6979                    ims.mCursorChanged = true;
6980                }
6981            }
6982        }
6983
6984        if (what instanceof ParcelableSpan) {
6985            // If this is a span that can be sent to a remote process,
6986            // the current extract editor would be interested in it.
6987            if (ims != null && ims.mExtracting != null) {
6988                if (ims.mBatchEditNesting != 0) {
6989                    if (oldStart >= 0) {
6990                        if (ims.mChangedStart > oldStart) {
6991                            ims.mChangedStart = oldStart;
6992                        }
6993                        if (ims.mChangedStart > oldEnd) {
6994                            ims.mChangedStart = oldEnd;
6995                        }
6996                    }
6997                    if (newStart >= 0) {
6998                        if (ims.mChangedStart > newStart) {
6999                            ims.mChangedStart = newStart;
7000                        }
7001                        if (ims.mChangedStart > newEnd) {
7002                            ims.mChangedStart = newEnd;
7003                        }
7004                    }
7005                } else {
7006                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7007                            + oldStart + "-" + oldEnd + ","
7008                            + newStart + "-" + newEnd + what);
7009                    ims.mContentChanged = true;
7010                }
7011            }
7012        }
7013    }
7014
7015    private class ChangeWatcher
7016    implements TextWatcher, SpanWatcher {
7017
7018        private CharSequence mBeforeText;
7019
7020        public void beforeTextChanged(CharSequence buffer, int start,
7021                                      int before, int after) {
7022            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7023                    + " before=" + before + " after=" + after + ": " + buffer);
7024
7025            if (AccessibilityManager.getInstance(mContext).isEnabled()
7026                    && !isPasswordInputType(mInputType)
7027                    && !hasPasswordTransformationMethod()) {
7028                mBeforeText = buffer.toString();
7029            }
7030
7031            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7032        }
7033
7034        public void onTextChanged(CharSequence buffer, int start,
7035                                  int before, int after) {
7036            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7037                    + " before=" + before + " after=" + after + ": " + buffer);
7038            TextView.this.handleTextChanged(buffer, start, before, after);
7039
7040            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7041                    (isFocused() || isSelected() &&
7042                    isShown())) {
7043                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7044                mBeforeText = null;
7045            }
7046        }
7047
7048        public void afterTextChanged(Editable buffer) {
7049            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7050            TextView.this.sendAfterTextChanged(buffer);
7051
7052            if (MetaKeyKeyListener.getMetaState(buffer,
7053                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7054                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7055            }
7056        }
7057
7058        public void onSpanChanged(Spannable buf,
7059                                  Object what, int s, int e, int st, int en) {
7060            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7061                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7062            TextView.this.spanChange(buf, what, s, st, e, en);
7063        }
7064
7065        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7066            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7067                    + " what=" + what + ": " + buf);
7068            TextView.this.spanChange(buf, what, -1, s, -1, e);
7069        }
7070
7071        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7072            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7073                    + " what=" + what + ": " + buf);
7074            TextView.this.spanChange(buf, what, s, -1, e, -1);
7075        }
7076    }
7077
7078    /**
7079     * @hide
7080     */
7081    @Override
7082    public void dispatchFinishTemporaryDetach() {
7083        mDispatchTemporaryDetach = true;
7084        super.dispatchFinishTemporaryDetach();
7085        mDispatchTemporaryDetach = false;
7086    }
7087
7088    @Override
7089    public void onStartTemporaryDetach() {
7090        super.onStartTemporaryDetach();
7091        // Only track when onStartTemporaryDetach() is called directly,
7092        // usually because this instance is an editable field in a list
7093        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7094    }
7095
7096    @Override
7097    public void onFinishTemporaryDetach() {
7098        super.onFinishTemporaryDetach();
7099        // Only track when onStartTemporaryDetach() is called directly,
7100        // usually because this instance is an editable field in a list
7101        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7102    }
7103
7104    @Override
7105    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7106        if (mTemporaryDetach) {
7107            // If we are temporarily in the detach state, then do nothing.
7108            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7109            return;
7110        }
7111
7112        mShowCursor = SystemClock.uptimeMillis();
7113
7114        ensureEndedBatchEdit();
7115
7116        if (focused) {
7117            int selStart = getSelectionStart();
7118            int selEnd = getSelectionEnd();
7119
7120            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7121            // mode for these, unless there was a specific selection already started.
7122            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7123                    selEnd == mText.length();
7124            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7125
7126            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7127                // If a tap was used to give focus to that view, move cursor at tap position.
7128                // Has to be done before onTakeFocus, which can be overloaded.
7129                final int lastTapPosition = getLastTapPosition();
7130                if (lastTapPosition >= 0) {
7131                    Selection.setSelection((Spannable) mText, lastTapPosition);
7132                }
7133
7134                if (mMovement != null) {
7135                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7136                }
7137
7138                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7139                // pressed. Since it is the ViewRoot's mView, it requests focus before
7140                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7141                // This special case ensure that we keep current selection in that case.
7142                // It would be better to know why the DecorView does not have focus at that time.
7143                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7144                        selStart >= 0 && selEnd >= 0) {
7145                    /*
7146                     * Someone intentionally set the selection, so let them
7147                     * do whatever it is that they wanted to do instead of
7148                     * the default on-focus behavior.  We reset the selection
7149                     * here instead of just skipping the onTakeFocus() call
7150                     * because some movement methods do something other than
7151                     * just setting the selection in theirs and we still
7152                     * need to go through that path.
7153                     */
7154                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7155                }
7156
7157                if (mSelectAllOnFocus) {
7158                    selectAll();
7159                }
7160
7161                mTouchFocusSelected = true;
7162            }
7163
7164            mFrozenWithFocus = false;
7165            mSelectionMoved = false;
7166
7167            if (mText instanceof Spannable) {
7168                Spannable sp = (Spannable) mText;
7169                MetaKeyKeyListener.resetMetaState(sp);
7170            }
7171
7172            makeBlink();
7173
7174            if (mError != null) {
7175                showError();
7176            }
7177        } else {
7178            if (mError != null) {
7179                hideError();
7180            }
7181            // Don't leave us in the middle of a batch edit.
7182            onEndBatchEdit();
7183
7184            if (this instanceof ExtractEditText) {
7185                // terminateTextSelectionMode removes selection, which we want to keep when
7186                // ExtractEditText goes out of focus.
7187                final int selStart = getSelectionStart();
7188                final int selEnd = getSelectionEnd();
7189                hideControllers();
7190                Selection.setSelection((Spannable) mText, selStart, selEnd);
7191            } else {
7192                hideControllers();
7193            }
7194
7195            // No need to create the controller
7196            if (mSelectionModifierCursorController != null) {
7197                mSelectionModifierCursorController.resetTouchOffsets();
7198            }
7199        }
7200
7201        startStopMarquee(focused);
7202
7203        if (mTransformation != null) {
7204            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7205        }
7206
7207        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7208
7209        // Performed after super.onFocusChanged so that this TextView is registered and can ask for
7210        // the IME. Showing the IME while focus is moved using the D-Pad is a bad idea, however this
7211        // does not happen in that case (using the arrows on a bluetooth keyboard).
7212        if (focused && isTextEditable()) {
7213            final InputMethodManager imm = InputMethodManager.peekInstance();
7214            if (imm != null) imm.showSoftInput(this, 0);
7215        }
7216    }
7217
7218    private int getLastTapPosition() {
7219        // No need to create the controller at that point, no last tap position saved
7220        if (mSelectionModifierCursorController != null) {
7221            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7222            if (lastTapPosition >= 0) {
7223                // Safety check, should not be possible.
7224                if (lastTapPosition > mText.length()) {
7225                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7226                            + mText.length() + ")");
7227                    lastTapPosition = mText.length();
7228                }
7229                return lastTapPosition;
7230            }
7231        }
7232
7233        return -1;
7234    }
7235
7236    @Override
7237    public void onWindowFocusChanged(boolean hasWindowFocus) {
7238        super.onWindowFocusChanged(hasWindowFocus);
7239
7240        if (hasWindowFocus) {
7241            if (mBlink != null) {
7242                mBlink.uncancel();
7243                makeBlink();
7244            }
7245        } else {
7246            if (mBlink != null) {
7247                mBlink.cancel();
7248            }
7249            // Don't leave us in the middle of a batch edit.
7250            onEndBatchEdit();
7251            if (mInputContentType != null) {
7252                mInputContentType.enterDown = false;
7253            }
7254            hideControllers();
7255        }
7256
7257        startStopMarquee(hasWindowFocus);
7258    }
7259
7260    @Override
7261    protected void onVisibilityChanged(View changedView, int visibility) {
7262        super.onVisibilityChanged(changedView, visibility);
7263        if (visibility != VISIBLE) {
7264            hideControllers();
7265        }
7266    }
7267
7268    /**
7269     * Use {@link BaseInputConnection#removeComposingSpans
7270     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7271     * state from this text view.
7272     */
7273    public void clearComposingText() {
7274        if (mText instanceof Spannable) {
7275            BaseInputConnection.removeComposingSpans((Spannable)mText);
7276        }
7277    }
7278
7279    @Override
7280    public void setSelected(boolean selected) {
7281        boolean wasSelected = isSelected();
7282
7283        super.setSelected(selected);
7284
7285        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7286            if (selected) {
7287                startMarquee();
7288            } else {
7289                stopMarquee();
7290            }
7291        }
7292    }
7293
7294    @Override
7295    public boolean onTouchEvent(MotionEvent event) {
7296        final int action = event.getActionMasked();
7297
7298        if (hasInsertionController()) {
7299            getInsertionController().onTouchEvent(event);
7300        }
7301        if (hasSelectionController()) {
7302            getSelectionController().onTouchEvent(event);
7303        }
7304
7305        if (action == MotionEvent.ACTION_DOWN) {
7306            mLastDownPositionX = (int) event.getX();
7307            mLastDownPositionY = (int) event.getY();
7308
7309            // Reset this state; it will be re-set if super.onTouchEvent
7310            // causes focus to move to the view.
7311            mTouchFocusSelected = false;
7312            mIgnoreActionUpEvent = false;
7313        }
7314
7315        final boolean superResult = super.onTouchEvent(event);
7316
7317        /*
7318         * Don't handle the release after a long press, because it will
7319         * move the selection away from whatever the menu action was
7320         * trying to affect.
7321         */
7322        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7323            mDiscardNextActionUp = false;
7324            return superResult;
7325        }
7326
7327        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7328                isFocused();
7329
7330        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7331                && mText instanceof Spannable && mLayout != null) {
7332            boolean handled = false;
7333
7334            final int oldScrollX = mScrollX;
7335            final int oldScrollY = mScrollY;
7336
7337            if (mMovement != null) {
7338                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7339            }
7340
7341            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7342                // The LinkMovementMethod which should handle taps on links has not been installed
7343                // to support text selection. We reproduce its behavior here to open links.
7344                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7345                        getSelectionEnd(), ClickableSpan.class);
7346
7347                if (links.length != 0) {
7348                    links[0].onClick(this);
7349                    handled = true;
7350                }
7351            }
7352
7353            if (isTextEditable() || mTextIsSelectable) {
7354                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
7355                    // Hide insertion anchor while scrolling. Leave selection.
7356                    hideInsertionPointCursorController();
7357                    // No need to create the controller, since there is nothing to update.
7358                    if (mSelectionModifierCursorController != null &&
7359                            mSelectionModifierCursorController.isShowing()) {
7360                        mSelectionModifierCursorController.updatePosition();
7361                    }
7362                }
7363
7364                if (touchIsFinished) {
7365                    // Show the IME, except when selecting in read-only text.
7366                    if (!mTextIsSelectable) {
7367                        final InputMethodManager imm = InputMethodManager.peekInstance();
7368                        handled |= imm != null && imm.showSoftInput(this, 0);
7369                    }
7370
7371
7372                    boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7373                    if (!selectAllGotFocus && hasSelection()) {
7374                        startSelectionActionMode();
7375                    } else {
7376                        stopSelectionActionMode();
7377                        if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7378                            getInsertionController().show();
7379                        }
7380                    }
7381                }
7382            }
7383
7384            if (handled) {
7385                return true;
7386            }
7387        }
7388
7389        return superResult;
7390    }
7391
7392    @Override
7393    public boolean onGenericMotionEvent(MotionEvent event) {
7394        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7395            try {
7396                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7397                    return true;
7398                }
7399            } catch (AbstractMethodError ex) {
7400                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7401                // Ignore its absence in case third party applications implemented the
7402                // interface directly.
7403            }
7404        }
7405        return super.onGenericMotionEvent(event);
7406    }
7407
7408    private void prepareCursorControllers() {
7409        boolean windowSupportsHandles = false;
7410
7411        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7412        if (params instanceof WindowManager.LayoutParams) {
7413            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7414            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7415                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7416        }
7417
7418        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7419        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7420                mLayout != null;
7421
7422        if (!mInsertionControllerEnabled) {
7423            hideInsertionPointCursorController();
7424            if (mInsertionPointCursorController != null) {
7425                mInsertionPointCursorController.onDetached();
7426                mInsertionPointCursorController = null;
7427            }
7428        }
7429
7430        if (!mSelectionControllerEnabled) {
7431            stopSelectionActionMode();
7432            if (mSelectionModifierCursorController != null) {
7433                mSelectionModifierCursorController.onDetached();
7434                mSelectionModifierCursorController = null;
7435            }
7436        }
7437    }
7438
7439    /**
7440     * @return True iff this TextView contains a text that can be edited, or if this is
7441     * a selectable TextView.
7442     */
7443    private boolean isTextEditable() {
7444        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7445    }
7446
7447    /**
7448     * Returns true, only while processing a touch gesture, if the initial
7449     * touch down event caused focus to move to the text view and as a result
7450     * its selection changed.  Only valid while processing the touch gesture
7451     * of interest.
7452     */
7453    public boolean didTouchFocusSelect() {
7454        return mTouchFocusSelected;
7455    }
7456
7457    @Override
7458    public void cancelLongPress() {
7459        super.cancelLongPress();
7460        mIgnoreActionUpEvent = true;
7461    }
7462
7463    @Override
7464    public boolean onTrackballEvent(MotionEvent event) {
7465        if (mMovement != null && mText instanceof Spannable &&
7466            mLayout != null) {
7467            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7468                return true;
7469            }
7470        }
7471
7472        return super.onTrackballEvent(event);
7473    }
7474
7475    public void setScroller(Scroller s) {
7476        mScroller = s;
7477    }
7478
7479    private static class Blink extends Handler implements Runnable {
7480        private final WeakReference<TextView> mView;
7481        private boolean mCancelled;
7482
7483        public Blink(TextView v) {
7484            mView = new WeakReference<TextView>(v);
7485        }
7486
7487        public void run() {
7488            if (mCancelled) {
7489                return;
7490            }
7491
7492            removeCallbacks(Blink.this);
7493
7494            TextView tv = mView.get();
7495
7496            if (tv != null && tv.shouldBlink()) {
7497                if (tv.mLayout != null) {
7498                    tv.invalidateCursorPath();
7499                }
7500
7501                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7502            }
7503        }
7504
7505        void cancel() {
7506            if (!mCancelled) {
7507                removeCallbacks(Blink.this);
7508                mCancelled = true;
7509            }
7510        }
7511
7512        void uncancel() {
7513            mCancelled = false;
7514        }
7515    }
7516
7517    /**
7518     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
7519     */
7520    private boolean shouldBlink() {
7521        if (!isFocused()) return false;
7522
7523        final int start = getSelectionStart();
7524        if (start < 0) return false;
7525
7526        final int end = getSelectionEnd();
7527        if (end < 0) return false;
7528
7529        return start == end;
7530    }
7531
7532    private void makeBlink() {
7533        if (isCursorVisible()) {
7534            if (shouldBlink()) {
7535                mShowCursor = SystemClock.uptimeMillis();
7536                if (mBlink == null) mBlink = new Blink(this);
7537                mBlink.removeCallbacks(mBlink);
7538                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
7539            }
7540        } else {
7541            if (mBlink != null) mBlink.removeCallbacks(mBlink);
7542        }
7543    }
7544
7545    @Override
7546    protected float getLeftFadingEdgeStrength() {
7547        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7548        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7549            if (mMarquee != null && !mMarquee.isStopped()) {
7550                final Marquee marquee = mMarquee;
7551                if (marquee.shouldDrawLeftFade()) {
7552                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7553                } else {
7554                    return 0.0f;
7555                }
7556            } else if (getLineCount() == 1) {
7557                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7558                    case Gravity.LEFT:
7559                        return 0.0f;
7560                    case Gravity.RIGHT:
7561                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7562                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7563                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7564                    case Gravity.CENTER_HORIZONTAL:
7565                        return 0.0f;
7566                }
7567            }
7568        }
7569        return super.getLeftFadingEdgeStrength();
7570    }
7571
7572    @Override
7573    protected float getRightFadingEdgeStrength() {
7574        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7575        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7576            if (mMarquee != null && !mMarquee.isStopped()) {
7577                final Marquee marquee = mMarquee;
7578                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7579            } else if (getLineCount() == 1) {
7580                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7581                    case Gravity.LEFT:
7582                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7583                                getCompoundPaddingRight();
7584                        final float lineWidth = mLayout.getLineWidth(0);
7585                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7586                    case Gravity.RIGHT:
7587                        return 0.0f;
7588                    case Gravity.CENTER_HORIZONTAL:
7589                    case Gravity.FILL_HORIZONTAL:
7590                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7591                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7592                                getHorizontalFadingEdgeLength();
7593                }
7594            }
7595        }
7596        return super.getRightFadingEdgeStrength();
7597    }
7598
7599    @Override
7600    protected int computeHorizontalScrollRange() {
7601        if (mLayout != null) {
7602            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7603                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7604        }
7605
7606        return super.computeHorizontalScrollRange();
7607    }
7608
7609    @Override
7610    protected int computeVerticalScrollRange() {
7611        if (mLayout != null)
7612            return mLayout.getHeight();
7613
7614        return super.computeVerticalScrollRange();
7615    }
7616
7617    @Override
7618    protected int computeVerticalScrollExtent() {
7619        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7620    }
7621
7622    public enum BufferType {
7623        NORMAL, SPANNABLE, EDITABLE,
7624    }
7625
7626    /**
7627     * Returns the TextView_textColor attribute from the
7628     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7629     * from the TextView_textAppearance attribute, if TextView_textColor
7630     * was not set directly.
7631     */
7632    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7633        ColorStateList colors;
7634        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7635                                         TextView_textColor);
7636
7637        if (colors == null) {
7638            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7639                                         TextView_textAppearance, -1);
7640            if (ap != -1) {
7641                TypedArray appearance;
7642                appearance = context.obtainStyledAttributes(ap,
7643                                            com.android.internal.R.styleable.TextAppearance);
7644                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7645                                                  TextAppearance_textColor);
7646                appearance.recycle();
7647            }
7648        }
7649
7650        return colors;
7651    }
7652
7653    /**
7654     * Returns the default color from the TextView_textColor attribute
7655     * from the AttributeSet, if set, or the default color from the
7656     * TextAppearance_textColor from the TextView_textAppearance attribute,
7657     * if TextView_textColor was not set directly.
7658     */
7659    public static int getTextColor(Context context,
7660                                   TypedArray attrs,
7661                                   int def) {
7662        ColorStateList colors = getTextColors(context, attrs);
7663
7664        if (colors == null) {
7665            return def;
7666        } else {
7667            return colors.getDefaultColor();
7668        }
7669    }
7670
7671    @Override
7672    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7673        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7674        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7675            switch (keyCode) {
7676            case KeyEvent.KEYCODE_A:
7677                if (canSelectText()) {
7678                    return onTextContextMenuItem(ID_SELECT_ALL);
7679                }
7680                break;
7681            case KeyEvent.KEYCODE_X:
7682                if (canCut()) {
7683                    return onTextContextMenuItem(ID_CUT);
7684                }
7685                break;
7686            case KeyEvent.KEYCODE_C:
7687                if (canCopy()) {
7688                    return onTextContextMenuItem(ID_COPY);
7689                }
7690                break;
7691            case KeyEvent.KEYCODE_V:
7692                if (canPaste()) {
7693                    return onTextContextMenuItem(ID_PASTE);
7694                }
7695                break;
7696            }
7697        }
7698        return super.onKeyShortcut(keyCode, event);
7699    }
7700
7701    /**
7702     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7703     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7704     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7705     */
7706    private boolean canSelectText() {
7707        return hasSelectionController() && mText.length() != 0;
7708    }
7709
7710    /**
7711     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7712     * The text must be spannable and the movement method must allow for arbitary selection.
7713     *
7714     * See also {@link #canSelectText()}.
7715     */
7716    private boolean textCanBeSelected() {
7717        // prepareCursorController() relies on this method.
7718        // If you change this condition, make sure prepareCursorController is called anywhere
7719        // the value of this condition might be changed.
7720        return mText instanceof Spannable && mMovement != null && mMovement.canSelectArbitrarily();
7721    }
7722
7723    private boolean canCut() {
7724        if (hasPasswordTransformationMethod()) {
7725            return false;
7726        }
7727
7728        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
7729            return true;
7730        }
7731
7732        return false;
7733    }
7734
7735    private boolean canCopy() {
7736        if (hasPasswordTransformationMethod()) {
7737            return false;
7738        }
7739
7740        if (mText.length() > 0 && hasSelection()) {
7741            return true;
7742        }
7743
7744        return false;
7745    }
7746
7747    private boolean canPaste() {
7748        return (mText instanceof Editable &&
7749                mInput != null &&
7750                getSelectionStart() >= 0 &&
7751                getSelectionEnd() >= 0 &&
7752                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7753                hasPrimaryClip());
7754    }
7755
7756    private boolean isWordCharacter(int c, int type) {
7757        return (c == '\'' || c == '"' ||
7758                type == Character.UPPERCASE_LETTER ||
7759                type == Character.LOWERCASE_LETTER ||
7760                type == Character.TITLECASE_LETTER ||
7761                type == Character.MODIFIER_LETTER ||
7762                type == Character.OTHER_LETTER || // Should handle asian characters
7763                type == Character.DECIMAL_DIGIT_NUMBER);
7764    }
7765
7766    /**
7767     * Returns the offsets delimiting the 'word' located at position offset.
7768     *
7769     * @param offset An offset in the text.
7770     * @return The offsets for the start and end of the word located at <code>offset</code>.
7771     * The two ints offsets are packed in a long using {@link #packRangeInLong(int, int)}.
7772     * Returns -1 if no valid word was found.
7773     */
7774    private long getWordLimitsAt(int offset) {
7775        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7776        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7777
7778        // Text selection is not permitted in password fields
7779        if (hasPasswordTransformationMethod()) {
7780            return -1;
7781        }
7782
7783        final int len = mText.length();
7784
7785        // Specific text fields: always select the entire text
7786        if (klass == InputType.TYPE_CLASS_NUMBER ||
7787                klass == InputType.TYPE_CLASS_PHONE ||
7788                klass == InputType.TYPE_CLASS_DATETIME ||
7789                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7790                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7791                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7792                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7793            return len > 0 ? packRangeInLong(0, len) : -1;
7794        }
7795
7796        int end = Math.min(offset, len);
7797        if (end < 0) {
7798            return -1;
7799        }
7800
7801        final int MAX_LENGTH = 48;
7802        int start = end;
7803
7804        for (; start > 0; start--) {
7805            final char c = mTransformed.charAt(start - 1);
7806            final int type = Character.getType(c);
7807            if (start == end && type == Character.OTHER_PUNCTUATION) {
7808                // Cases where the text ends with a '.' and we select from the end of the line
7809                // (right after the dot), or when we select from the space character in "aaa, bbb".
7810                continue;
7811            }
7812            if (type == Character.SURROGATE) { // Two Character codepoint
7813                end = start - 1; // Recheck as a pair when scanning forward
7814                continue;
7815            }
7816            if (!isWordCharacter(c, type)) break;
7817            if ((end - start) > MAX_LENGTH) return -1;
7818        }
7819
7820        for (; end < len; end++) {
7821            final int c = Character.codePointAt(mTransformed, end);
7822            final int type = Character.getType(c);
7823            if (!isWordCharacter(c, type)) break;
7824            if ((end - start) > MAX_LENGTH) return -1;
7825            if (c > 0xFFFF) { // Two Character codepoint
7826                end++;
7827            }
7828        }
7829
7830        if (start == end) {
7831            return -1;
7832        }
7833
7834        // Two ints packed in a long
7835        return packRangeInLong(start, end);
7836    }
7837
7838    private static long packRangeInLong(int start, int end) {
7839        return (((long) start) << 32) | end;
7840    }
7841
7842    private static int extractRangeStartFromLong(long range) {
7843        return (int) (range >>> 32);
7844    }
7845
7846    private static int extractRangeEndFromLong(long range) {
7847        return (int) (range & 0x00000000FFFFFFFFL);
7848    }
7849
7850    private void selectAll() {
7851        Selection.setSelection((Spannable) mText, 0, mText.length());
7852    }
7853
7854    private void selectCurrentWord() {
7855        if (!canSelectText()) {
7856            return;
7857        }
7858
7859        if (hasPasswordTransformationMethod()) {
7860            // Always select all on a password field.
7861            // Cut/copy menu entries are not available for passwords, but being able to select all
7862            // is however useful to delete or paste to replace the entire content.
7863            selectAll();
7864            return;
7865        }
7866
7867        long lastTouchOffsets = getLastTouchOffsets();
7868        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
7869        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
7870
7871        int selectionStart, selectionEnd;
7872
7873        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7874        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7875        if (urlSpans.length == 1) {
7876            URLSpan url = urlSpans[0];
7877            selectionStart = ((Spanned) mText).getSpanStart(url);
7878            selectionEnd = ((Spanned) mText).getSpanEnd(url);
7879        } else {
7880            long wordLimits = getWordLimitsAt(minOffset);
7881            if (wordLimits >= 0) {
7882                selectionStart = extractRangeStartFromLong(wordLimits);
7883            } else {
7884                selectionStart = Math.max(minOffset - 5, 0);
7885            }
7886
7887            wordLimits = getWordLimitsAt(maxOffset);
7888            if (wordLimits >= 0) {
7889                selectionEnd = extractRangeEndFromLong(wordLimits);
7890            } else {
7891                selectionEnd = Math.min(maxOffset + 5, mText.length());
7892            }
7893        }
7894
7895        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7896    }
7897
7898    private long getLastTouchOffsets() {
7899        int minOffset, maxOffset;
7900
7901        if (mContextMenuTriggeredByKey) {
7902            minOffset = getSelectionStart();
7903            maxOffset = getSelectionEnd();
7904        } else {
7905            SelectionModifierCursorController selectionController = getSelectionController();
7906            minOffset = selectionController.getMinTouchOffset();
7907            maxOffset = selectionController.getMaxTouchOffset();
7908        }
7909
7910        return packRangeInLong(minOffset, maxOffset);
7911    }
7912
7913    @Override
7914    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7915        if (!isShown()) {
7916            return false;
7917        }
7918
7919        final boolean isPassword = hasPasswordTransformationMethod();
7920
7921        if (!isPassword) {
7922            CharSequence text = getText();
7923            if (TextUtils.isEmpty(text)) {
7924                text = getHint();
7925            }
7926            if (!TextUtils.isEmpty(text)) {
7927                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7928                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7929                }
7930                event.getText().add(text);
7931            }
7932        } else {
7933            event.setPassword(isPassword);
7934        }
7935        return false;
7936    }
7937
7938    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7939            int fromIndex, int removedCount, int addedCount) {
7940        AccessibilityEvent event =
7941            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7942        event.setFromIndex(fromIndex);
7943        event.setRemovedCount(removedCount);
7944        event.setAddedCount(addedCount);
7945        event.setBeforeText(beforeText);
7946        sendAccessibilityEventUnchecked(event);
7947    }
7948
7949    @Override
7950    protected void onCreateContextMenu(ContextMenu menu) {
7951        super.onCreateContextMenu(menu);
7952        boolean added = false;
7953        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7954        // Problem with context menu on long press: the menu appears while the key in down and when
7955        // the key is released, the view does not receive the key_up event.
7956        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
7957        // events. We cannot simply clear these flags in onTextContextMenuItem since
7958        // it may not be called (if the user/ discards the context menu with the back key).
7959        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
7960        // available in onTextContextMenuItem.
7961        mDPadCenterIsDown = mEnterKeyIsDown = false;
7962
7963        MenuHandler handler = new MenuHandler();
7964
7965        if (mText instanceof Spanned && hasSelectionController()) {
7966            long lastTouchOffset = getLastTouchOffsets();
7967            final int selStart = extractRangeStartFromLong(lastTouchOffset);
7968            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
7969
7970            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
7971            if (urls.length > 0) {
7972                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7973                        setOnMenuItemClickListener(handler);
7974
7975                added = true;
7976            }
7977        }
7978
7979        // The context menu is not empty, which will prevent the selection mode from starting.
7980        // Add a entry to start it in the context menu.
7981        // TODO Does not handle the case where a subclass does not call super.thisMethod or
7982        // populates the menu AFTER this call.
7983        if (menu.size() > 0) {
7984            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
7985                    setOnMenuItemClickListener(handler);
7986            added = true;
7987        }
7988
7989        if (added) {
7990            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7991        }
7992    }
7993
7994    /**
7995     * Returns whether this text view is a current input method target.  The
7996     * default implementation just checks with {@link InputMethodManager}.
7997     */
7998    public boolean isInputMethodTarget() {
7999        InputMethodManager imm = InputMethodManager.peekInstance();
8000        return imm != null && imm.isActive(this);
8001    }
8002
8003    // Selection context mode
8004    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8005    private static final int ID_CUT = android.R.id.cut;
8006    private static final int ID_COPY = android.R.id.copy;
8007    private static final int ID_PASTE = android.R.id.paste;
8008    // Context menu entries
8009    private static final int ID_COPY_URL = android.R.id.copyUrl;
8010    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8011
8012    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8013        public boolean onMenuItemClick(MenuItem item) {
8014            return onTextContextMenuItem(item.getItemId());
8015        }
8016    }
8017
8018    /**
8019     * Called when a context menu option for the text view is selected.  Currently
8020     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8021     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8022     * or {@link android.R.id#copy}.
8023     */
8024    public boolean onTextContextMenuItem(int id) {
8025        int min = 0;
8026        int max = mText.length();
8027
8028        if (isFocused()) {
8029            final int selStart = getSelectionStart();
8030            final int selEnd = getSelectionEnd();
8031
8032            min = Math.max(0, Math.min(selStart, selEnd));
8033            max = Math.max(0, Math.max(selStart, selEnd));
8034        }
8035
8036        switch (id) {
8037            case ID_COPY_URL:
8038                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8039                if (urls.length >= 1) {
8040                    ClipData clip = null;
8041                    for (int i=0; i<urls.length; i++) {
8042                        Uri uri = Uri.parse(urls[0].getURL());
8043                        if (clip == null) {
8044                            clip = ClipData.newRawUri(null, uri);
8045                        } else {
8046                            clip.addItem(new ClipData.Item(uri));
8047                        }
8048                    }
8049                    if (clip != null) {
8050                        setPrimaryClip(clip);
8051                    }
8052                }
8053                stopSelectionActionMode();
8054                return true;
8055
8056            case ID_SELECTION_MODE:
8057                if (mSelectionActionMode != null) {
8058                    // Selection mode is already started, simply change selected part.
8059                    updateSelectedRegion();
8060                } else {
8061                    startSelectionActionMode();
8062                }
8063                return true;
8064
8065            case ID_SELECT_ALL:
8066                // This does not enter text selection mode. Text is highlighted, so that it can be
8067                // bulk edited, like selectAllOnFocus does.
8068                selectAll();
8069                return true;
8070
8071            case ID_PASTE:
8072                paste(min, max);
8073                return true;
8074
8075            case ID_CUT:
8076                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8077                ((Editable) mText).delete(min, max);
8078                stopSelectionActionMode();
8079                return true;
8080
8081            case ID_COPY:
8082                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8083                stopSelectionActionMode();
8084                return true;
8085        }
8086        return false;
8087    }
8088
8089    /**
8090     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8091     * by [min, max] when replacing this region by paste.
8092     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8093     * make sure we do not add an extra one from the paste content.
8094     */
8095    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8096        if (paste.length() > 0) {
8097            if (min > 0) {
8098                final char charBefore = mTransformed.charAt(min - 1);
8099                final char charAfter = paste.charAt(0);
8100
8101                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8102                    // Two spaces at beginning of paste: remove one
8103                    final int originalLength = mText.length();
8104                    ((Editable) mText).delete(min - 1, min);
8105                    // Due to filters, there is no guarantee that exactly one character was
8106                    // removed: count instead.
8107                    final int delta = mText.length() - originalLength;
8108                    min += delta;
8109                    max += delta;
8110                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8111                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8112                    // No space at beginning of paste: add one
8113                    final int originalLength = mText.length();
8114                    ((Editable) mText).replace(min, min, " ");
8115                    // Taking possible filters into account as above.
8116                    final int delta = mText.length() - originalLength;
8117                    min += delta;
8118                    max += delta;
8119                }
8120            }
8121
8122            if (max < mText.length()) {
8123                final char charBefore = paste.charAt(paste.length() - 1);
8124                final char charAfter = mTransformed.charAt(max);
8125
8126                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8127                    // Two spaces at end of paste: remove one
8128                    ((Editable) mText).delete(max, max + 1);
8129                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8130                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8131                    // No space at end of paste: add one
8132                    ((Editable) mText).replace(max, max, " ");
8133                }
8134            }
8135        }
8136
8137        return packRangeInLong(min, max);
8138    }
8139
8140    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8141        TextView shadowView = (TextView) inflate(mContext,
8142                com.android.internal.R.layout.text_drag_thumbnail, null);
8143
8144        if (shadowView == null) {
8145            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8146        }
8147
8148        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8149            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8150        }
8151        shadowView.setText(text);
8152        shadowView.setTextColor(getTextColors());
8153
8154        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8155        shadowView.setGravity(Gravity.CENTER);
8156
8157        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8158                ViewGroup.LayoutParams.WRAP_CONTENT));
8159
8160        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8161        shadowView.measure(size, size);
8162
8163        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8164        shadowView.invalidate();
8165        return new DragShadowBuilder(shadowView);
8166    }
8167
8168    private static class DragLocalState {
8169        public TextView sourceTextView;
8170        public int start, end;
8171
8172        public DragLocalState(TextView sourceTextView, int start, int end) {
8173            this.sourceTextView = sourceTextView;
8174            this.start = start;
8175            this.end = end;
8176        }
8177    }
8178
8179    @Override
8180    public boolean performLongClick() {
8181        if (super.performLongClick()) {
8182            mDiscardNextActionUp = true;
8183            return true;
8184        }
8185
8186        boolean handled = false;
8187
8188        // Long press in empty space moves cursor and shows the Paste affordance if available.
8189        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8190                mInsertionControllerEnabled) {
8191            final int offset = getOffset(mLastDownPositionX, mLastDownPositionY);
8192            stopSelectionActionMode();
8193            Selection.setSelection((Spannable)mText, offset);
8194            getInsertionController().show(0);
8195            handled = true;
8196        }
8197
8198        if (!handled && mSelectionActionMode != null) {
8199            if (touchPositionIsInSelection()) {
8200                // Start a drag
8201                final int start = getSelectionStart();
8202                final int end = getSelectionEnd();
8203                CharSequence selectedText = mTransformed.subSequence(start, end);
8204                ClipData data = ClipData.newPlainText(null, selectedText);
8205                DragLocalState localState = new DragLocalState(this, start, end);
8206                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8207                stopSelectionActionMode();
8208            } else {
8209                // New selection at touch position
8210                updateSelectedRegion();
8211            }
8212            handled = true;
8213        }
8214
8215        // Start a new selection
8216        handled |= !handled && startSelectionActionMode();
8217
8218        if (handled) {
8219            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8220            mDiscardNextActionUp = true;
8221        }
8222
8223        return handled;
8224    }
8225
8226    /**
8227     * When selection mode is already started, this method simply updates the selected part of text
8228     * to the text under the finger.
8229     */
8230    private void updateSelectedRegion() {
8231        // Start a new selection at current position, keep selectionAction mode on
8232        selectCurrentWord();
8233        // Updates handles' positions
8234        getSelectionController().show();
8235    }
8236
8237    private boolean touchPositionIsInSelection() {
8238        int selectionStart = getSelectionStart();
8239        int selectionEnd = getSelectionEnd();
8240
8241        if (selectionStart == selectionEnd) {
8242            return false;
8243        }
8244
8245        if (selectionStart > selectionEnd) {
8246            int tmp = selectionStart;
8247            selectionStart = selectionEnd;
8248            selectionEnd = tmp;
8249            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8250        }
8251
8252        SelectionModifierCursorController selectionController = getSelectionController();
8253        int minOffset = selectionController.getMinTouchOffset();
8254        int maxOffset = selectionController.getMaxTouchOffset();
8255
8256        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8257    }
8258
8259    /**
8260     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8261     * selection is initiated in this View.
8262     *
8263     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8264     * Paste actions, depending on what this View supports.
8265     *
8266     * A custom implementation can add new entries in the default menu in its
8267     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
8268     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
8269     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
8270     * {@link android.R.id#paste} ids as parameters.
8271     *
8272     * Returning false from {@link ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will
8273     * prevent the action mode from being started.
8274     *
8275     * Action click events should be handled by the custom implementation of
8276     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8277     *
8278     * Note that text selection mode is not started when a TextView receives focus and the
8279     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8280     * that case, to allow for quick replacement.
8281     */
8282    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8283        mCustomSelectionActionModeCallback = actionModeCallback;
8284    }
8285
8286    /**
8287     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8288     *
8289     * @return The current custom selection callback.
8290     */
8291    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8292        return mCustomSelectionActionModeCallback;
8293    }
8294
8295    /**
8296     *
8297     * @return true if the selection mode was actually started.
8298     */
8299    private boolean startSelectionActionMode() {
8300        if (mSelectionActionMode != null) {
8301            // Selection action mode is already started
8302            return false;
8303        }
8304
8305        if (!canSelectText() || !requestFocus()) {
8306            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8307            return false;
8308        }
8309
8310        if (!hasSelection()) {
8311            // If selection mode is started after a device rotation, there is already a selection.
8312            selectCurrentWord();
8313        }
8314
8315        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8316        mSelectionActionMode = startActionMode(actionModeCallback);
8317        final boolean selectionStarted = mSelectionActionMode != null;
8318
8319        if (selectionStarted && !mTextIsSelectable) {
8320            // Show the IME to be able to replace text, except when selecting non editable text.
8321            final InputMethodManager imm = InputMethodManager.peekInstance();
8322            if (imm != null) imm.showSoftInput(this, 0, null);
8323        }
8324
8325        return selectionStarted;
8326    }
8327
8328    private void stopSelectionActionMode() {
8329        if (mSelectionActionMode != null) {
8330            // This will hide the mSelectionModifierCursorController
8331            mSelectionActionMode.finish();
8332        }
8333    }
8334
8335    /**
8336     * Paste clipboard content between min and max positions.
8337     */
8338    private void paste(int min, int max) {
8339        ClipboardManager clipboard =
8340            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8341        ClipData clip = clipboard.getPrimaryClip();
8342        if (clip != null) {
8343            boolean didfirst = false;
8344            for (int i=0; i<clip.getItemCount(); i++) {
8345                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
8346                if (paste != null) {
8347                    if (!didfirst) {
8348                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8349                        min = extractRangeStartFromLong(minMax);
8350                        max = extractRangeEndFromLong(minMax);
8351                        Selection.setSelection((Spannable) mText, max);
8352                        ((Editable) mText).replace(min, max, paste);
8353                    } else {
8354                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8355                        ((Editable) mText).insert(getSelectionEnd(), paste);
8356                    }
8357                }
8358            }
8359            stopSelectionActionMode();
8360            sLastCutOrCopyTime = 0;
8361        }
8362    }
8363
8364    private void setPrimaryClip(ClipData clip) {
8365        ClipboardManager clipboard = (ClipboardManager) getContext().
8366                getSystemService(Context.CLIPBOARD_SERVICE);
8367        clipboard.setPrimaryClip(clip);
8368        sLastCutOrCopyTime = SystemClock.uptimeMillis();
8369    }
8370
8371    /**
8372     * An ActionMode Callback class that is used to provide actions while in text selection mode.
8373     *
8374     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
8375     * on which of these this TextView supports.
8376     */
8377    private class SelectionActionModeCallback implements ActionMode.Callback {
8378
8379        @Override
8380        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
8381            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
8382
8383            mode.setTitle(mContext.getString(com.android.internal.R.string.textSelectionCABTitle));
8384            mode.setSubtitle(null);
8385
8386            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
8387                    setAlphabeticShortcut('a').
8388                    setShowAsAction(
8389                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8390
8391            if (canCut()) {
8392                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
8393                    setIcon(styledAttributes.getResourceId(
8394                            R.styleable.Theme_actionModeCutDrawable, 0)).
8395                    setAlphabeticShortcut('x').
8396                    setShowAsAction(
8397                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8398            }
8399
8400            if (canCopy()) {
8401                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
8402                    setIcon(styledAttributes.getResourceId(
8403                            R.styleable.Theme_actionModeCopyDrawable, 0)).
8404                    setAlphabeticShortcut('c').
8405                    setShowAsAction(
8406                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8407            }
8408
8409            if (canPaste()) {
8410                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
8411                        setIcon(styledAttributes.getResourceId(
8412                                R.styleable.Theme_actionModePasteDrawable, 0)).
8413                        setAlphabeticShortcut('v').
8414                        setShowAsAction(
8415                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8416            }
8417
8418            styledAttributes.recycle();
8419
8420            if (mCustomSelectionActionModeCallback != null) {
8421                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
8422                    // The custom mode can choose to cancel the action mode
8423                    return false;
8424                }
8425            }
8426
8427            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
8428                getSelectionController().show();
8429                return true;
8430            } else {
8431                return false;
8432            }
8433        }
8434
8435        @Override
8436        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
8437            if (mCustomSelectionActionModeCallback != null) {
8438                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
8439            }
8440            return true;
8441        }
8442
8443        @Override
8444        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
8445            if (mCustomSelectionActionModeCallback != null &&
8446                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
8447                return true;
8448            }
8449            return onTextContextMenuItem(item.getItemId());
8450        }
8451
8452        @Override
8453        public void onDestroyActionMode(ActionMode mode) {
8454            if (mCustomSelectionActionModeCallback != null) {
8455                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
8456            }
8457            Selection.setSelection((Spannable) mText, getSelectionEnd());
8458
8459            if (mSelectionModifierCursorController != null) {
8460                mSelectionModifierCursorController.hide();
8461            }
8462
8463            mSelectionActionMode = null;
8464        }
8465    }
8466
8467    /**
8468     * A CursorController instance can be used to control a cursor in the text.
8469     * It is not used outside of {@link TextView}.
8470     * @hide
8471     */
8472    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
8473        /**
8474         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
8475         * See also {@link #hide()}.
8476         */
8477        public void show();
8478
8479        /**
8480         * Hide the cursor controller from screen.
8481         * See also {@link #show()}.
8482         */
8483        public void hide();
8484
8485        /**
8486         * @return true if the CursorController is currently visible
8487         */
8488        public boolean isShowing();
8489
8490        /**
8491         * Update the controller's position.
8492         */
8493        public void updatePosition(HandleView handle, int x, int y);
8494
8495        public void updateOffset(HandleView handle, int offset);
8496
8497        public void updatePosition();
8498
8499        public int getCurrentOffset(HandleView handle);
8500
8501        /**
8502         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
8503         * a chance to become active and/or visible.
8504         * @param event The touch event
8505         */
8506        public boolean onTouchEvent(MotionEvent event);
8507
8508        /**
8509         * Called when the view is detached from window. Perform house keeping task, such as
8510         * stopping Runnable thread that would otherwise keep a reference on the context, thus
8511         * preventing the activity to be recycled.
8512         */
8513        public void onDetached();
8514    }
8515
8516    private class PastePopupMenu implements OnClickListener {
8517        private final PopupWindow mContainer;
8518        private int mPositionX;
8519        private int mPositionY;
8520        private final View[] mPasteViews = new View[4];
8521        private final int[] mPasteViewLayouts = new int[] {
8522                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
8523                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
8524
8525        public PastePopupMenu() {
8526            mContainer = new PopupWindow(TextView.this.mContext, null,
8527                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8528            mContainer.setSplitTouchEnabled(true);
8529            mContainer.setClippingEnabled(false);
8530            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8531
8532            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8533            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8534        }
8535
8536        private int viewIndex(boolean onTop) {
8537            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
8538        }
8539
8540        private void updateContent(boolean onTop) {
8541            final int viewIndex = viewIndex(onTop);
8542            View view = mPasteViews[viewIndex];
8543
8544            if (view == null) {
8545                final int layout = mPasteViewLayouts[viewIndex];
8546                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8547                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8548                if (inflater != null) {
8549                    view = inflater.inflate(layout, null);
8550                }
8551
8552                if (view == null) {
8553                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
8554                }
8555
8556                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8557                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8558                        ViewGroup.LayoutParams.WRAP_CONTENT));
8559                view.measure(size, size);
8560
8561                view.setOnClickListener(this);
8562
8563                mPasteViews[viewIndex] = view;
8564            }
8565
8566            mContainer.setContentView(view);
8567        }
8568
8569        public void show() {
8570            updateContent(true);
8571            positionAtCursor();
8572        }
8573
8574        public void hide() {
8575            mContainer.dismiss();
8576        }
8577
8578        public boolean isShowing() {
8579            return mContainer.isShowing();
8580        }
8581
8582        @Override
8583        public void onClick(View v) {
8584            if (canPaste()) {
8585                paste(getSelectionStart(), getSelectionEnd());
8586            }
8587            hide();
8588        }
8589
8590        void positionAtCursor() {
8591            View contentView = mContainer.getContentView();
8592            int width = contentView.getMeasuredWidth();
8593            int height = contentView.getMeasuredHeight();
8594            final int offset = TextView.this.getSelectionStart();
8595            final int line = mLayout.getLineForOffset(offset);
8596            final int lineTop = mLayout.getLineTop(line);
8597            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
8598
8599            final Rect bounds = sCursorControllerTempRect;
8600            bounds.left = (int) (primaryHorizontal - width / 2.0f);
8601            bounds.top = lineTop - height;
8602
8603            bounds.right = bounds.left + width;
8604            bounds.bottom = bounds.top + height;
8605
8606            convertFromViewportToContentCoordinates(bounds);
8607
8608            mPositionX = bounds.left;
8609            mPositionY = bounds.top;
8610
8611
8612            final int[] coords = mTempCoords;
8613            TextView.this.getLocationInWindow(coords);
8614            coords[0] += mPositionX;
8615            coords[1] += mPositionY;
8616
8617            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
8618            if (coords[1] < 0) {
8619                updateContent(false);
8620                // Update dimensions from new view
8621                contentView = mContainer.getContentView();
8622                width = contentView.getMeasuredWidth();
8623                height = contentView.getMeasuredHeight();
8624
8625                // Vertical clipping, move under edited line and to the side of insertion cursor
8626                // TODO bottom clipping in case there is no system bar
8627                coords[1] += height;
8628                final int lineBottom = mLayout.getLineBottom(line);
8629                final int lineHeight = lineBottom - lineTop;
8630                coords[1] += lineHeight;
8631
8632                // Move to right hand side of insertion cursor by default. TODO RTL text.
8633                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
8634                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
8635
8636                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
8637                    coords[0] += handleHalfWidth + width / 2;
8638                } else {
8639                    coords[0] -= handleHalfWidth + width / 2;
8640                }
8641            } else {
8642                // Horizontal clipping
8643                coords[0] = Math.max(0, coords[0]);
8644                coords[0] = Math.min(screenWidth - width, coords[0]);
8645            }
8646
8647            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
8648        }
8649    }
8650
8651    private class HandleView extends View implements ViewTreeObserver.OnScrollChangedListener {
8652        private Drawable mDrawable;
8653        private final ScrollingPopupWindow mContainer;
8654        private int mPositionX;
8655        private int mPositionY;
8656        private final CursorController mController;
8657        private boolean mIsDragging;
8658        private float mTouchToWindowOffsetX;
8659        private float mTouchToWindowOffsetY;
8660        private float mHotspotX;
8661        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
8662        private float mTouchOffsetY;
8663        // Where the touch position should be on the handle to ensure a maximum cursor visibility
8664        private float mIdealVerticalOffset;
8665        private int mLastParentX;
8666        private int mLastParentY;
8667        private float mDownPositionX, mDownPositionY;
8668        private int mContainerPositionX, mContainerPositionY;
8669        private long mTouchTimer;
8670        private boolean mIsInsertionHandle = false;
8671        private PastePopupMenu mPastePopupWindow;
8672
8673        // Touch-up filter: number of previous positions remembered
8674        private static final int HISTORY_SIZE = 5;
8675        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
8676        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
8677        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
8678        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
8679        private int mPreviousOffsetIndex = 0;
8680        private int mNumberPreviousOffsets = 0;
8681
8682        public void startTouchUpFilter(int offset) {
8683            mNumberPreviousOffsets = 0;
8684            addPositionToTouchUpFilter(offset);
8685        }
8686
8687        public void addPositionToTouchUpFilter(int offset) {
8688            if (mNumberPreviousOffsets > 0 &&
8689                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
8690                // Make sure only actual changes of position are recorded.
8691                return;
8692            }
8693
8694            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
8695            mPreviousOffsets[mPreviousOffsetIndex] = offset;
8696            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
8697            mNumberPreviousOffsets++;
8698        }
8699
8700        public void filterOnTouchUp() {
8701            final long now = SystemClock.uptimeMillis();
8702            int i = 0;
8703            int index = mPreviousOffsetIndex;
8704            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
8705            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
8706                i++;
8707                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
8708            }
8709
8710            if (i > 0 && i < iMax &&
8711                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
8712                mController.updateOffset(this, mPreviousOffsets[index]);
8713            }
8714        }
8715
8716        public static final int LEFT = 0;
8717        public static final int CENTER = 1;
8718        public static final int RIGHT = 2;
8719
8720        public HandleView(CursorController controller, int pos) {
8721            super(TextView.this.mContext);
8722            mController = controller;
8723            mContainer = new ScrollingPopupWindow(TextView.this.mContext, null,
8724                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8725            mContainer.setSplitTouchEnabled(true);
8726            mContainer.setClippingEnabled(false);
8727            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8728
8729            setOrientation(pos);
8730        }
8731
8732        public void setOrientation(int pos) {
8733            int handleWidth;
8734            switch (pos) {
8735                case LEFT: {
8736                    if (mSelectHandleLeft == null) {
8737                        mSelectHandleLeft = mContext.getResources().getDrawable(
8738                                mTextSelectHandleLeftRes);
8739                    }
8740                    mDrawable = mSelectHandleLeft;
8741                    handleWidth = mDrawable.getIntrinsicWidth();
8742                    mHotspotX = handleWidth * 3.0f / 4.0f;
8743                    break;
8744                }
8745
8746                case RIGHT: {
8747                    if (mSelectHandleRight == null) {
8748                        mSelectHandleRight = mContext.getResources().getDrawable(
8749                                mTextSelectHandleRightRes);
8750                    }
8751                    mDrawable = mSelectHandleRight;
8752                    handleWidth = mDrawable.getIntrinsicWidth();
8753                    mHotspotX = handleWidth / 4.0f;
8754                    break;
8755                }
8756
8757                case CENTER:
8758                default: {
8759                    if (mSelectHandleCenter == null) {
8760                        mSelectHandleCenter = mContext.getResources().getDrawable(
8761                                mTextSelectHandleRes);
8762                    }
8763                    mDrawable = mSelectHandleCenter;
8764                    handleWidth = mDrawable.getIntrinsicWidth();
8765                    mHotspotX = handleWidth / 2.0f;
8766                    mIsInsertionHandle = true;
8767                    break;
8768                }
8769            }
8770
8771            final int handleHeight = mDrawable.getIntrinsicHeight();
8772
8773            mTouchOffsetY = -0.3f * handleHeight;
8774            mIdealVerticalOffset = 0.7f * handleHeight;
8775            invalidate();
8776        }
8777
8778        @Override
8779        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
8780            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
8781                    mDrawable.getIntrinsicHeight());
8782        }
8783
8784        public void show() {
8785            if (!isPositionVisible()) {
8786                hide();
8787                return;
8788            }
8789            mContainer.setContentView(this);
8790            mContainerPositionX = mPositionX;
8791            mContainerPositionY = mPositionY - TextView.this.getHeight();
8792            mContainer.showAsDropDown(TextView.this, mContainerPositionX, mContainerPositionY);
8793
8794            // Hide paste view when handle is moved on screen.
8795            hidePastePopupWindow();
8796        }
8797
8798        public void hide() {
8799            mIsDragging = false;
8800            mContainer.dismiss();
8801            hidePastePopupWindow();
8802            ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8803            vto.removeOnScrollChangedListener(this);
8804        }
8805
8806        public boolean isShowing() {
8807            return mContainer.isShowing();
8808        }
8809
8810        private boolean isPositionVisible() {
8811            // Always show a dragging handle.
8812            if (mIsDragging) {
8813                return true;
8814            }
8815
8816            if (isInBatchEditMode()) {
8817                return false;
8818            }
8819
8820            final int extendedPaddingTop = getExtendedPaddingTop();
8821            final int extendedPaddingBottom = getExtendedPaddingBottom();
8822            final int compoundPaddingLeft = getCompoundPaddingLeft();
8823            final int compoundPaddingRight = getCompoundPaddingRight();
8824
8825            final TextView hostView = TextView.this;
8826
8827            if (mTempRect == null) {
8828                mTempRect = new Rect();
8829            }
8830            final Rect clip = mTempRect;
8831            clip.left = compoundPaddingLeft;
8832            clip.top = extendedPaddingTop;
8833            clip.right = hostView.getWidth() - compoundPaddingRight;
8834            clip.bottom = hostView.getHeight() - extendedPaddingBottom;
8835
8836            final ViewParent parent = hostView.getParent();
8837            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
8838                return false;
8839            }
8840
8841            final int[] coords = mTempCoords;
8842            hostView.getLocationInWindow(coords);
8843            final int posX = coords[0] + mPositionX + (int) mHotspotX;
8844            final int posY = coords[1] + mPositionY;
8845
8846            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
8847            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
8848                    posY >= clip.top && posY <= clip.bottom;
8849        }
8850
8851        private void moveTo(int x, int y) {
8852            mPositionX = x - TextView.this.mScrollX;
8853            mPositionY = y - TextView.this.mScrollY;
8854            if (isPositionVisible()) {
8855                int[] coords = null;
8856                if (mContainer.isShowing()) {
8857                    final int containerPositionX = mPositionX;
8858                    final int containerPositionY = mPositionY - TextView.this.getHeight();
8859
8860                    if (containerPositionX != mContainerPositionX ||
8861                        containerPositionY != mContainerPositionY) {
8862                        mContainerPositionX = containerPositionX;
8863                        mContainerPositionY = containerPositionY;
8864
8865                        mContainer.update(TextView.this, mContainerPositionX, mContainerPositionY,
8866                                mRight - mLeft, mBottom - mTop);
8867
8868                        // Hide paste popup window as soon as a scroll occurs.
8869                        hidePastePopupWindow();
8870                    }
8871                } else {
8872                    show();
8873                }
8874
8875                if (mIsDragging) {
8876                    if (coords == null) {
8877                        coords = mTempCoords;
8878                        TextView.this.getLocationInWindow(coords);
8879                    }
8880                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
8881                        mTouchToWindowOffsetX += coords[0] - mLastParentX;
8882                        mTouchToWindowOffsetY += coords[1] - mLastParentY;
8883                        mLastParentX = coords[0];
8884                        mLastParentY = coords[1];
8885                    }
8886                    // Hide paste popup window as soon as the handle is dragged.
8887                    hidePastePopupWindow();
8888                }
8889            } else {
8890                hide();
8891            }
8892        }
8893
8894        @Override
8895        protected void onDraw(Canvas c) {
8896            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
8897            mDrawable.draw(c);
8898        }
8899
8900        @Override
8901        public boolean onTouchEvent(MotionEvent ev) {
8902            switch (ev.getActionMasked()) {
8903                case MotionEvent.ACTION_DOWN: {
8904                    startTouchUpFilter(mController.getCurrentOffset(this));
8905                    mDownPositionX = ev.getRawX();
8906                    mDownPositionY = ev.getRawY();
8907                    mTouchToWindowOffsetX = mDownPositionX - mPositionX;
8908                    mTouchToWindowOffsetY = mDownPositionY - mPositionY;
8909
8910                    final int[] coords = mTempCoords;
8911                    TextView.this.getLocationInWindow(coords);
8912                    mLastParentX = coords[0];
8913                    mLastParentY = coords[1];
8914                    mIsDragging = true;
8915                    if (mIsInsertionHandle) {
8916                        mTouchTimer = SystemClock.uptimeMillis();
8917                    }
8918                    break;
8919                }
8920
8921                case MotionEvent.ACTION_MOVE: {
8922                    final float rawX = ev.getRawX();
8923                    final float rawY = ev.getRawY();
8924
8925                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
8926                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
8927                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
8928                    float newVerticalOffset;
8929                    if (previousVerticalOffset < mIdealVerticalOffset) {
8930                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
8931                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
8932                    } else {
8933                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
8934                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
8935                    }
8936                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
8937
8938                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
8939                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
8940
8941                    mController.updatePosition(this, Math.round(newPosX), Math.round(newPosY));
8942                    break;
8943                }
8944
8945                case MotionEvent.ACTION_UP:
8946                    if (mIsInsertionHandle) {
8947                        long delay = SystemClock.uptimeMillis() - mTouchTimer;
8948                        if (delay < ViewConfiguration.getTapTimeout()) {
8949                            final float deltaX = mDownPositionX - ev.getRawX();
8950                            final float deltaY = mDownPositionY - ev.getRawY();
8951                            final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
8952                            if (distanceSquared < mSquaredTouchSlopDistance) {
8953                                if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
8954                                    // Tapping on the handle dismisses the displayed paste view,
8955                                    mPastePopupWindow.hide();
8956                                } else {
8957                                    ((InsertionPointCursorController) mController).show(0);
8958                                }
8959                            }
8960                        }
8961                    }
8962                    filterOnTouchUp();
8963                    mIsDragging = false;
8964                    break;
8965
8966                case MotionEvent.ACTION_CANCEL:
8967                    mIsDragging = false;
8968                    break;
8969            }
8970            return true;
8971        }
8972
8973        public boolean isDragging() {
8974            return mIsDragging;
8975        }
8976
8977        void positionAtCursor(final int offset) {
8978            addPositionToTouchUpFilter(offset);
8979            final int width = mDrawable.getIntrinsicWidth();
8980            final int height = mDrawable.getIntrinsicHeight();
8981            final int line = mLayout.getLineForOffset(offset);
8982            final int lineBottom = mLayout.getLineBottom(line);
8983
8984            final Rect bounds = sCursorControllerTempRect;
8985            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX) +
8986                    TextView.this.mScrollX;
8987            bounds.top = lineBottom + TextView.this.mScrollY;
8988
8989            bounds.right = bounds.left + width;
8990            bounds.bottom = bounds.top + height;
8991
8992            convertFromViewportToContentCoordinates(bounds);
8993            moveTo(bounds.left, bounds.top);
8994        }
8995
8996        void showPastePopupWindow() {
8997            if (mIsInsertionHandle) {
8998                if (mPastePopupWindow == null) {
8999                    // Lazy initialisation: create when actually shown only.
9000                    mPastePopupWindow = new PastePopupMenu();
9001                }
9002                mPastePopupWindow.show();
9003            }
9004        }
9005
9006        void hidePastePopupWindow() {
9007            if (mPastePopupWindow != null) {
9008                mPastePopupWindow.hide();
9009            }
9010        }
9011
9012        /**
9013         * A popup window, attached to a view, and that listens to scroll events in its anchors'
9014         * view hierarchy, so that it is automatically moved on such events.
9015         */
9016        private class ScrollingPopupWindow extends PopupWindow {
9017
9018            private int[] mDrawingLocations = new int[2];
9019
9020            public ScrollingPopupWindow(Context context, AttributeSet attrs, int defStyle) {
9021                super(context, attrs, defStyle);
9022            }
9023
9024            @Override
9025            public boolean findDropDownPosition(View anchor, WindowManager.LayoutParams p,
9026                    int xoff, int yoff) {
9027                anchor.getLocationInWindow(mDrawingLocations);
9028                p.x = mDrawingLocations[0] + xoff;
9029                p.y = mDrawingLocations[1] + anchor.getHeight() + yoff;
9030
9031                // Hide paste popup as soon as the view is scrolled.
9032                hidePastePopupWindow();
9033
9034                if (!isPositionVisible()) {
9035                    dismiss();
9036                    onHandleBecomeInvisible();
9037                }
9038
9039                return false;
9040            }
9041        }
9042
9043        public void onScrollChanged() {
9044            if (isPositionVisible()) {
9045                show();
9046                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9047                vto.removeOnScrollChangedListener(this);
9048            }
9049        }
9050
9051        public void onHandleBecomeInvisible() {
9052            ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9053            vto.addOnScrollChangedListener(this);
9054        }
9055    }
9056
9057    private class InsertionPointCursorController implements CursorController {
9058        private static final int DELAY_BEFORE_FADE_OUT = 4000;
9059        private static final int DELAY_BEFORE_PASTE = 2000;
9060        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000;
9061
9062        // The cursor controller image. Lazily created.
9063        private HandleView mHandle;
9064        private Runnable mHider;
9065        private Runnable mPastePopupShower;
9066
9067        public void show() {
9068            show(DELAY_BEFORE_PASTE);
9069        }
9070
9071        public void show(int delayBeforePaste) {
9072            updatePosition();
9073            hideDelayed();
9074            removePastePopupCallback();
9075            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
9076            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
9077                delayBeforePaste = 0;
9078            }
9079            if (delayBeforePaste == 0 || canPaste()) {
9080                if (mPastePopupShower == null) {
9081                    mPastePopupShower = new Runnable() {
9082                        public void run() {
9083                            getHandle().showPastePopupWindow();
9084                        }
9085                    };
9086                }
9087                postDelayed(mPastePopupShower, delayBeforePaste);
9088            }
9089        }
9090
9091        private void removePastePopupCallback() {
9092            if (mPastePopupShower != null) {
9093                removeCallbacks(mPastePopupShower);
9094            }
9095        }
9096
9097        private void removeHiderCallback() {
9098            if (mHider != null) {
9099                removeCallbacks(mHider);
9100            }
9101        }
9102
9103        public void hide() {
9104            if (mHandle != null) {
9105                mHandle.hide();
9106            }
9107            removeHiderCallback();
9108            removePastePopupCallback();
9109        }
9110
9111        private void hideDelayed() {
9112            removeHiderCallback();
9113            if (mHider == null) {
9114                mHider = new Runnable() {
9115                    public void run() {
9116                        hide();
9117                    }
9118                };
9119            }
9120            postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
9121        }
9122
9123        public boolean isShowing() {
9124            return mHandle != null && mHandle.isShowing();
9125        }
9126
9127        public void updatePosition(HandleView handle, int x, int y) {
9128            final int previousOffset = getSelectionStart();
9129            final int newOffset = getOffset(x, y);
9130
9131            if (newOffset != previousOffset) {
9132                updateOffset(handle, newOffset);
9133                removePastePopupCallback();
9134            }
9135            hideDelayed();
9136        }
9137
9138        public void updateOffset(HandleView handle, int offset) {
9139            Selection.setSelection((Spannable) mText, offset);
9140            updatePosition();
9141        }
9142
9143        public void updatePosition() {
9144            final int offset = getSelectionStart();
9145
9146            if (offset < 0) {
9147                // Should never happen, safety check.
9148                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
9149                hide();
9150                return;
9151            }
9152
9153            getHandle().positionAtCursor(offset);
9154        }
9155
9156        public int getCurrentOffset(HandleView handle) {
9157            return getSelectionStart();
9158        }
9159
9160        public boolean onTouchEvent(MotionEvent ev) {
9161            return false;
9162        }
9163
9164        public void onTouchModeChanged(boolean isInTouchMode) {
9165            if (!isInTouchMode) {
9166                hide();
9167            }
9168        }
9169
9170        private HandleView getHandle() {
9171            if (mHandle == null) {
9172                mHandle = new HandleView(this, HandleView.CENTER);
9173            }
9174            return mHandle;
9175        }
9176
9177        @Override
9178        public void onDetached() {
9179            removeHiderCallback();
9180            removePastePopupCallback();
9181        }
9182    }
9183
9184    private class SelectionModifierCursorController implements CursorController {
9185        // The cursor controller images, lazily created when shown.
9186        private HandleView mStartHandle, mEndHandle;
9187        // The offsets of that last touch down event. Remembered to start selection there.
9188        private int mMinTouchOffset, mMaxTouchOffset;
9189        // Whether selection anchors are active
9190        private boolean mIsShowing;
9191
9192        // Double tap detection
9193        private long mPreviousTapUpTime = 0;
9194        private int mPreviousTapPositionX;
9195        private int mPreviousTapPositionY;
9196
9197        SelectionModifierCursorController() {
9198            resetTouchOffsets();
9199        }
9200
9201        public void show() {
9202            if (isInBatchEditMode()) {
9203                return;
9204            }
9205
9206            // Lazy object creation has to be done before updatePosition() is called.
9207            if (mStartHandle == null) mStartHandle = new HandleView(this, HandleView.LEFT);
9208            if (mEndHandle == null) mEndHandle = new HandleView(this, HandleView.RIGHT);
9209
9210            mIsShowing = true;
9211            updatePosition();
9212
9213            mStartHandle.show();
9214            mEndHandle.show();
9215
9216            hideInsertionPointCursorController();
9217        }
9218
9219        public void hide() {
9220            if (mStartHandle != null) mStartHandle.hide();
9221            if (mEndHandle != null) mEndHandle.hide();
9222            mIsShowing = false;
9223        }
9224
9225        public boolean isShowing() {
9226            return mIsShowing;
9227        }
9228
9229        public void updatePosition(HandleView handle, int x, int y) {
9230            int selectionStart = getSelectionStart();
9231            int selectionEnd = getSelectionEnd();
9232
9233            int offset = getOffset(x, y);
9234
9235            // Handle the case where start and end are swapped, making sure start <= end
9236            if (handle == mStartHandle) {
9237                if (selectionStart == offset || offset > selectionEnd) {
9238                    return; // no change, no need to redraw;
9239                }
9240                // If the user "closes" the selection entirely they were probably trying to
9241                // select a single character. Help them out.
9242                if (offset == selectionEnd) {
9243                    offset = selectionEnd - 1;
9244                }
9245                selectionStart = offset;
9246            } else {
9247                if (selectionEnd == offset || offset < selectionStart) {
9248                    return; // no change, no need to redraw;
9249                }
9250                // If the user "closes" the selection entirely they were probably trying to
9251                // select a single character. Help them out.
9252                if (offset == selectionStart) {
9253                    offset = selectionStart + 1;
9254                }
9255                selectionEnd = offset;
9256            }
9257
9258            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9259            updatePosition();
9260        }
9261
9262        public void updateOffset(HandleView handle, int offset) {
9263            int start = getSelectionStart();
9264            int end = getSelectionEnd();
9265
9266            if (mStartHandle == handle) {
9267                start = offset;
9268            } else {
9269                end = offset;
9270            }
9271
9272            Selection.setSelection((Spannable) mText, start, end);
9273            updatePosition();
9274        }
9275
9276        public void updatePosition() {
9277            if (!isShowing()) {
9278                return;
9279            }
9280
9281            final int selectionStart = getSelectionStart();
9282            final int selectionEnd = getSelectionEnd();
9283
9284            if ((selectionStart < 0) || (selectionEnd < 0)) {
9285                // Should never happen, safety check.
9286                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
9287                hide();
9288                return;
9289            }
9290
9291            // The handles have been created since the controller isShowing().
9292            mStartHandle.positionAtCursor(selectionStart);
9293            mEndHandle.positionAtCursor(selectionEnd);
9294        }
9295
9296        public int getCurrentOffset(HandleView handle) {
9297            return mStartHandle == handle ? getSelectionStart() : getSelectionEnd();
9298        }
9299
9300        public boolean onTouchEvent(MotionEvent event) {
9301            // This is done even when the View does not have focus, so that long presses can start
9302            // selection and tap can move cursor from this tap position.
9303            if (isTextEditable() || mTextIsSelectable) {
9304                switch (event.getActionMasked()) {
9305                    case MotionEvent.ACTION_DOWN:
9306                        final int x = (int) event.getX();
9307                        final int y = (int) event.getY();
9308
9309                        // Remember finger down position, to be able to start selection from there
9310                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
9311
9312                        // Double tap detection
9313                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
9314                        if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
9315                                isPositionOnText(x, y)) {
9316                            final int deltaX = x - mPreviousTapPositionX;
9317                            final int deltaY = y - mPreviousTapPositionY;
9318                            final int distanceSquared = deltaX * deltaX + deltaY * deltaY;
9319                            if (distanceSquared < mSquaredTouchSlopDistance) {
9320                                startSelectionActionMode();
9321                                mDiscardNextActionUp = true;
9322                            }
9323                        }
9324
9325                        mPreviousTapPositionX = x;
9326                        mPreviousTapPositionY = y;
9327
9328                        break;
9329
9330                    case MotionEvent.ACTION_POINTER_DOWN:
9331                    case MotionEvent.ACTION_POINTER_UP:
9332                        // Handle multi-point gestures. Keep min and max offset positions.
9333                        // Only activated for devices that correctly handle multi-touch.
9334                        if (mContext.getPackageManager().hasSystemFeature(
9335                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
9336                            updateMinAndMaxOffsets(event);
9337                        }
9338                        break;
9339
9340                    case MotionEvent.ACTION_UP:
9341                        mPreviousTapUpTime = SystemClock.uptimeMillis();
9342                        break;
9343                }
9344            }
9345            return false;
9346        }
9347
9348        /**
9349         * @param event
9350         */
9351        private void updateMinAndMaxOffsets(MotionEvent event) {
9352            int pointerCount = event.getPointerCount();
9353            for (int index = 0; index < pointerCount; index++) {
9354                final int x = (int) event.getX(index);
9355                final int y = (int) event.getY(index);
9356                int offset = getOffset(x, y);
9357                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
9358                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
9359            }
9360        }
9361
9362        public int getMinTouchOffset() {
9363            return mMinTouchOffset;
9364        }
9365
9366        public int getMaxTouchOffset() {
9367            return mMaxTouchOffset;
9368        }
9369
9370        public void resetTouchOffsets() {
9371            mMinTouchOffset = mMaxTouchOffset = -1;
9372        }
9373
9374        /**
9375         * @return true iff this controller is currently used to move the selection start.
9376         */
9377        public boolean isSelectionStartDragged() {
9378            return mStartHandle != null && mStartHandle.isDragging();
9379        }
9380
9381        public void onTouchModeChanged(boolean isInTouchMode) {
9382            if (!isInTouchMode) {
9383                hide();
9384            }
9385        }
9386
9387        @Override
9388        public void onDetached() {}
9389    }
9390
9391    private void hideInsertionPointCursorController() {
9392        // No need to create the controller to hide it.
9393        if (mInsertionPointCursorController != null) {
9394            mInsertionPointCursorController.hide();
9395        }
9396    }
9397
9398    /**
9399     * Hides the insertion controller and stops text selection mode, hiding the selection controller
9400     */
9401    private void hideControllers() {
9402        hideInsertionPointCursorController();
9403        stopSelectionActionMode();
9404    }
9405
9406    /**
9407     * Get the offset character closest to the specified absolute position.
9408     *
9409     * @param x The horizontal absolute position of a point on screen
9410     * @param y The vertical absolute position of a point on screen
9411     * @return the character offset for the character whose position is closest to the specified
9412     *  position. Returns -1 if there is no layout.
9413     *
9414     * @hide
9415     */
9416    public int getOffset(int x, int y) {
9417        if (getLayout() == null) return -1;
9418        final int line = getLineAtCoordinate(y);
9419        final int offset = getOffsetAtCoordinate(line, x);
9420        return offset;
9421    }
9422
9423    private int convertToLocalHorizontalCoordinate(int x) {
9424        x -= getTotalPaddingLeft();
9425        // Clamp the position to inside of the view.
9426        x = Math.max(0, x);
9427        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9428        x += getScrollX();
9429        return x;
9430    }
9431
9432    private int getLineAtCoordinate(int y) {
9433        y -= getTotalPaddingTop();
9434        // Clamp the position to inside of the view.
9435        y = Math.max(0, y);
9436        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9437        y += getScrollY();
9438        return getLayout().getLineForVertical(y);
9439    }
9440
9441    private int getOffsetAtCoordinate(int line, int x) {
9442        x = convertToLocalHorizontalCoordinate(x);
9443        return getLayout().getOffsetForHorizontal(line, x);
9444    }
9445
9446    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
9447     * in the view. Returns false when the position is in the empty space of left/right of text.
9448     */
9449    private boolean isPositionOnText(int x, int y) {
9450        if (getLayout() == null) return false;
9451
9452        final int line = getLineAtCoordinate(y);
9453        x = convertToLocalHorizontalCoordinate(x);
9454
9455        if (x < getLayout().getLineLeft(line)) return false;
9456        if (x > getLayout().getLineRight(line)) return false;
9457        return true;
9458    }
9459
9460    @Override
9461    public boolean onDragEvent(DragEvent event) {
9462        switch (event.getAction()) {
9463            case DragEvent.ACTION_DRAG_STARTED:
9464                return hasInsertionController();
9465
9466            case DragEvent.ACTION_DRAG_ENTERED:
9467                TextView.this.requestFocus();
9468                return true;
9469
9470            case DragEvent.ACTION_DRAG_LOCATION:
9471                final int offset = getOffset((int) event.getX(), (int) event.getY());
9472                Selection.setSelection((Spannable)mText, offset);
9473                return true;
9474
9475            case DragEvent.ACTION_DROP:
9476                onDrop(event);
9477                return true;
9478
9479            case DragEvent.ACTION_DRAG_ENDED:
9480            case DragEvent.ACTION_DRAG_EXITED:
9481            default:
9482                return true;
9483        }
9484    }
9485
9486    private void onDrop(DragEvent event) {
9487        StringBuilder content = new StringBuilder("");
9488        ClipData clipData = event.getClipData();
9489        final int itemCount = clipData.getItemCount();
9490        for (int i=0; i < itemCount; i++) {
9491            Item item = clipData.getItemAt(i);
9492            content.append(item.coerceToText(TextView.this.mContext));
9493        }
9494
9495        final int offset = getOffset((int) event.getX(), (int) event.getY());
9496
9497        Object localState = event.getLocalState();
9498        DragLocalState dragLocalState = null;
9499        if (localState instanceof DragLocalState) {
9500            dragLocalState = (DragLocalState) localState;
9501        }
9502        boolean dragDropIntoItself = dragLocalState != null &&
9503                dragLocalState.sourceTextView == this;
9504
9505        if (dragDropIntoItself) {
9506            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
9507                // A drop inside the original selection discards the drop.
9508                return;
9509            }
9510        }
9511
9512        final int originalLength = mText.length();
9513        long minMax = prepareSpacesAroundPaste(offset, offset, content);
9514        int min = extractRangeStartFromLong(minMax);
9515        int max = extractRangeEndFromLong(minMax);
9516
9517        Selection.setSelection((Spannable) mText, max);
9518        ((Editable) mText).replace(min, max, content);
9519
9520        if (dragDropIntoItself) {
9521            int dragSourceStart = dragLocalState.start;
9522            int dragSourceEnd = dragLocalState.end;
9523            if (max <= dragSourceStart) {
9524                // Inserting text before selection has shifted positions
9525                final int shift = mText.length() - originalLength;
9526                dragSourceStart += shift;
9527                dragSourceEnd += shift;
9528            }
9529
9530            // Delete original selection
9531            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
9532
9533            // Make sure we do not leave two adjacent spaces.
9534            if ((dragSourceStart == 0 ||
9535                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
9536                    (dragSourceStart == mText.length() ||
9537                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
9538                final int pos = dragSourceStart == mText.length() ?
9539                        dragSourceStart - 1 : dragSourceStart;
9540                ((Editable) mText).delete(pos, pos + 1);
9541            }
9542        }
9543    }
9544
9545    /**
9546     * @return True if this view supports insertion handles.
9547     */
9548    boolean hasInsertionController() {
9549        return mInsertionControllerEnabled;
9550    }
9551
9552    /**
9553     * @return True if this view supports selection handles.
9554     */
9555    boolean hasSelectionController() {
9556        return mSelectionControllerEnabled;
9557    }
9558
9559    InsertionPointCursorController getInsertionController() {
9560        if (!mInsertionControllerEnabled) {
9561            return null;
9562        }
9563
9564        if (mInsertionPointCursorController == null) {
9565            mInsertionPointCursorController = new InsertionPointCursorController();
9566
9567            final ViewTreeObserver observer = getViewTreeObserver();
9568            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
9569        }
9570
9571        return mInsertionPointCursorController;
9572    }
9573
9574    SelectionModifierCursorController getSelectionController() {
9575        if (!mSelectionControllerEnabled) {
9576            return null;
9577        }
9578
9579        if (mSelectionModifierCursorController == null) {
9580            mSelectionModifierCursorController = new SelectionModifierCursorController();
9581
9582            final ViewTreeObserver observer = getViewTreeObserver();
9583            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
9584        }
9585
9586        return mSelectionModifierCursorController;
9587    }
9588
9589    boolean isInBatchEditMode() {
9590        final InputMethodState ims = mInputMethodState;
9591        if (ims != null) {
9592            return ims.mBatchEditNesting > 0;
9593        }
9594        return mInBatchEditControllers;
9595    }
9596
9597    @ViewDebug.ExportedProperty(category = "text")
9598    private CharSequence            mText;
9599    private CharSequence            mTransformed;
9600    private BufferType              mBufferType = BufferType.NORMAL;
9601
9602    private int                     mInputType = EditorInfo.TYPE_NULL;
9603    private CharSequence            mHint;
9604    private Layout                  mHintLayout;
9605
9606    private KeyListener             mInput;
9607
9608    private MovementMethod          mMovement;
9609    private TransformationMethod    mTransformation;
9610    private ChangeWatcher           mChangeWatcher;
9611
9612    private ArrayList<TextWatcher>  mListeners = null;
9613
9614    // display attributes
9615    private final TextPaint         mTextPaint;
9616    private boolean                 mUserSetTextScaleX;
9617    private final Paint             mHighlightPaint;
9618    private int                     mHighlightColor = 0xCC475925;
9619    /**
9620     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
9621     * this field being protected. Will be restored as private when lineHeight
9622     * feature request 3215097 is implemented
9623     * @hide
9624     */
9625    protected Layout                mLayout;
9626
9627    private long                    mShowCursor;
9628    private Blink                   mBlink;
9629    private boolean                 mCursorVisible = true;
9630
9631    // Cursor Controllers.
9632    private InsertionPointCursorController mInsertionPointCursorController;
9633    private SelectionModifierCursorController mSelectionModifierCursorController;
9634    private ActionMode              mSelectionActionMode;
9635    private boolean                 mInsertionControllerEnabled;
9636    private boolean                 mSelectionControllerEnabled;
9637    private boolean                 mInBatchEditControllers;
9638
9639    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
9640    // select from the current cursor position. Otherwise, select from long pressed position.
9641    private boolean                 mDPadCenterIsDown = false;
9642    private boolean                 mEnterKeyIsDown = false;
9643    private boolean                 mContextMenuTriggeredByKey = false;
9644    // Created once and shared by different CursorController helper methods.
9645    // Only one cursor controller is active at any time which prevent race conditions.
9646    private static Rect             sCursorControllerTempRect = new Rect();
9647
9648    private boolean                 mSelectAllOnFocus = false;
9649
9650    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
9651    private boolean                 mHorizontallyScrolling;
9652
9653    private int                     mAutoLinkMask;
9654    private boolean                 mLinksClickable = true;
9655
9656    private float                   mSpacingMult = 1;
9657    private float                   mSpacingAdd = 0;
9658    private boolean                 mTextIsSelectable = false;
9659
9660    private static final int        LINES = 1;
9661    private static final int        EMS = LINES;
9662    private static final int        PIXELS = 2;
9663
9664    private int                     mMaximum = Integer.MAX_VALUE;
9665    private int                     mMaxMode = LINES;
9666    private int                     mMinimum = 0;
9667    private int                     mMinMode = LINES;
9668
9669    private int                     mMaxWidth = Integer.MAX_VALUE;
9670    private int                     mMaxWidthMode = PIXELS;
9671    private int                     mMinWidth = 0;
9672    private int                     mMinWidthMode = PIXELS;
9673
9674    private boolean                 mSingleLine;
9675    private int                     mDesiredHeightAtMeasure = -1;
9676    private boolean                 mIncludePad = true;
9677
9678    // tmp primitives, so we don't alloc them on each draw
9679    private Path                    mHighlightPath;
9680    private boolean                 mHighlightPathBogus = true;
9681    private static final RectF      sTempRect = new RectF();
9682
9683    // XXX should be much larger
9684    private static final int        VERY_WIDE = 16384;
9685
9686    private static final int        BLINK = 500;
9687
9688    private static final int ANIMATED_SCROLL_GAP = 250;
9689    private long mLastScroll;
9690    private Scroller mScroller = null;
9691
9692    private BoringLayout.Metrics mBoring;
9693    private BoringLayout.Metrics mHintBoring;
9694
9695    private BoringLayout mSavedLayout, mSavedHintLayout;
9696
9697    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
9698    private InputFilter[] mFilters = NO_FILTERS;
9699    private static final Spanned EMPTY_SPANNED = new SpannedString("");
9700    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
9701    // System wide time for last cut or copy action.
9702    private static long sLastCutOrCopyTime;
9703    // Used to highlight a word when it is corrected by the IME
9704    private CorrectionHighlighter mCorrectionHighlighter;
9705    // New state used to change background based on whether this TextView is multiline.
9706    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
9707}
9708