TextView.java revision 874d77c62e0aa18116063948cd580ad0b37b4578 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import com.android.internal.util.FastMath;
20import com.android.internal.widget.EditableInputConnection;
21
22import org.xmlpull.v1.XmlPullParserException;
23
24import android.R;
25import android.content.ClipData;
26import android.content.ClipData.Item;
27import android.content.ClipboardManager;
28import android.content.Context;
29import android.content.pm.PackageManager;
30import android.content.res.ColorStateList;
31import android.content.res.Resources;
32import android.content.res.TypedArray;
33import android.content.res.XmlResourceParser;
34import android.graphics.Canvas;
35import android.graphics.Color;
36import android.graphics.Paint;
37import android.graphics.Path;
38import android.graphics.Rect;
39import android.graphics.RectF;
40import android.graphics.Typeface;
41import android.graphics.drawable.Drawable;
42import android.inputmethodservice.ExtractEditText;
43import android.net.Uri;
44import android.os.Bundle;
45import android.os.Handler;
46import android.os.Message;
47import android.os.Parcel;
48import android.os.Parcelable;
49import android.os.ResultReceiver;
50import android.os.SystemClock;
51import android.text.BoringLayout;
52import android.text.DynamicLayout;
53import android.text.Editable;
54import android.text.GetChars;
55import android.text.GraphicsOperations;
56import android.text.InputFilter;
57import android.text.InputType;
58import android.text.Layout;
59import android.text.ParcelableSpan;
60import android.text.Selection;
61import android.text.SpanWatcher;
62import android.text.Spannable;
63import android.text.SpannableString;
64import android.text.Spanned;
65import android.text.SpannedString;
66import android.text.StaticLayout;
67import android.text.TextPaint;
68import android.text.TextUtils;
69import android.text.TextWatcher;
70import android.text.method.ArrowKeyMovementMethod;
71import android.text.method.DateKeyListener;
72import android.text.method.DateTimeKeyListener;
73import android.text.method.DialerKeyListener;
74import android.text.method.DigitsKeyListener;
75import android.text.method.KeyListener;
76import android.text.method.LinkMovementMethod;
77import android.text.method.MetaKeyKeyListener;
78import android.text.method.MovementMethod;
79import android.text.method.PasswordTransformationMethod;
80import android.text.method.SingleLineTransformationMethod;
81import android.text.method.TextKeyListener;
82import android.text.method.TimeKeyListener;
83import android.text.method.TransformationMethod;
84import android.text.style.ClickableSpan;
85import android.text.style.ParagraphStyle;
86import android.text.style.URLSpan;
87import android.text.style.UpdateAppearance;
88import android.text.util.Linkify;
89import android.util.AttributeSet;
90import android.util.FloatMath;
91import android.util.Log;
92import android.util.TypedValue;
93import android.view.ActionMode;
94import android.view.ActionMode.Callback;
95import android.view.ContextMenu;
96import android.view.DragEvent;
97import android.view.Gravity;
98import android.view.HapticFeedbackConstants;
99import android.view.KeyCharacterMap;
100import android.view.KeyEvent;
101import android.view.LayoutInflater;
102import android.view.Menu;
103import android.view.MenuItem;
104import android.view.MotionEvent;
105import android.view.View;
106import android.view.ViewConfiguration;
107import android.view.ViewDebug;
108import android.view.ViewGroup;
109import android.view.ViewGroup.LayoutParams;
110import android.view.ViewParent;
111import android.view.ViewRoot;
112import android.view.ViewTreeObserver;
113import android.view.WindowManager;
114import android.view.accessibility.AccessibilityEvent;
115import android.view.accessibility.AccessibilityManager;
116import android.view.animation.AnimationUtils;
117import android.view.inputmethod.BaseInputConnection;
118import android.view.inputmethod.CompletionInfo;
119import android.view.inputmethod.CorrectionInfo;
120import android.view.inputmethod.EditorInfo;
121import android.view.inputmethod.ExtractedText;
122import android.view.inputmethod.ExtractedTextRequest;
123import android.view.inputmethod.InputConnection;
124import android.view.inputmethod.InputMethodManager;
125import android.widget.RemoteViews.RemoteView;
126
127import java.io.IOException;
128import java.lang.ref.WeakReference;
129import java.util.ArrayList;
130
131/**
132 * Displays text to the user and optionally allows them to edit it.  A TextView
133 * is a complete text editor, however the basic class is configured to not
134 * allow editing; see {@link EditText} for a subclass that configures the text
135 * view for editing.
136 *
137 * <p>
138 * <b>XML attributes</b>
139 * <p>
140 * See {@link android.R.styleable#TextView TextView Attributes},
141 * {@link android.R.styleable#View View Attributes}
142 *
143 * @attr ref android.R.styleable#TextView_text
144 * @attr ref android.R.styleable#TextView_bufferType
145 * @attr ref android.R.styleable#TextView_hint
146 * @attr ref android.R.styleable#TextView_textColor
147 * @attr ref android.R.styleable#TextView_textColorHighlight
148 * @attr ref android.R.styleable#TextView_textColorHint
149 * @attr ref android.R.styleable#TextView_textAppearance
150 * @attr ref android.R.styleable#TextView_textColorLink
151 * @attr ref android.R.styleable#TextView_textSize
152 * @attr ref android.R.styleable#TextView_textScaleX
153 * @attr ref android.R.styleable#TextView_typeface
154 * @attr ref android.R.styleable#TextView_textStyle
155 * @attr ref android.R.styleable#TextView_cursorVisible
156 * @attr ref android.R.styleable#TextView_maxLines
157 * @attr ref android.R.styleable#TextView_maxHeight
158 * @attr ref android.R.styleable#TextView_lines
159 * @attr ref android.R.styleable#TextView_height
160 * @attr ref android.R.styleable#TextView_minLines
161 * @attr ref android.R.styleable#TextView_minHeight
162 * @attr ref android.R.styleable#TextView_maxEms
163 * @attr ref android.R.styleable#TextView_maxWidth
164 * @attr ref android.R.styleable#TextView_ems
165 * @attr ref android.R.styleable#TextView_width
166 * @attr ref android.R.styleable#TextView_minEms
167 * @attr ref android.R.styleable#TextView_minWidth
168 * @attr ref android.R.styleable#TextView_gravity
169 * @attr ref android.R.styleable#TextView_scrollHorizontally
170 * @attr ref android.R.styleable#TextView_password
171 * @attr ref android.R.styleable#TextView_singleLine
172 * @attr ref android.R.styleable#TextView_selectAllOnFocus
173 * @attr ref android.R.styleable#TextView_includeFontPadding
174 * @attr ref android.R.styleable#TextView_maxLength
175 * @attr ref android.R.styleable#TextView_shadowColor
176 * @attr ref android.R.styleable#TextView_shadowDx
177 * @attr ref android.R.styleable#TextView_shadowDy
178 * @attr ref android.R.styleable#TextView_shadowRadius
179 * @attr ref android.R.styleable#TextView_autoLink
180 * @attr ref android.R.styleable#TextView_linksClickable
181 * @attr ref android.R.styleable#TextView_numeric
182 * @attr ref android.R.styleable#TextView_digits
183 * @attr ref android.R.styleable#TextView_phoneNumber
184 * @attr ref android.R.styleable#TextView_inputMethod
185 * @attr ref android.R.styleable#TextView_capitalize
186 * @attr ref android.R.styleable#TextView_autoText
187 * @attr ref android.R.styleable#TextView_editable
188 * @attr ref android.R.styleable#TextView_freezesText
189 * @attr ref android.R.styleable#TextView_ellipsize
190 * @attr ref android.R.styleable#TextView_drawableTop
191 * @attr ref android.R.styleable#TextView_drawableBottom
192 * @attr ref android.R.styleable#TextView_drawableRight
193 * @attr ref android.R.styleable#TextView_drawableLeft
194 * @attr ref android.R.styleable#TextView_drawablePadding
195 * @attr ref android.R.styleable#TextView_lineSpacingExtra
196 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
197 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
198 * @attr ref android.R.styleable#TextView_inputType
199 * @attr ref android.R.styleable#TextView_imeOptions
200 * @attr ref android.R.styleable#TextView_privateImeOptions
201 * @attr ref android.R.styleable#TextView_imeActionLabel
202 * @attr ref android.R.styleable#TextView_imeActionId
203 * @attr ref android.R.styleable#TextView_editorExtras
204 */
205@RemoteView
206public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
207    static final String LOG_TAG = "TextView";
208    static final boolean DEBUG_EXTRACT = false;
209
210    private static final int PRIORITY = 100;
211    private int mCurrentAlpha = 255;
212
213    final int[] mTempCoords = new int[2];
214    Rect mTempRect;
215
216    private ColorStateList mTextColor;
217    private int mCurTextColor;
218    private ColorStateList mHintTextColor;
219    private ColorStateList mLinkTextColor;
220    private int mCurHintTextColor;
221    private boolean mFreezesText;
222    private boolean mFrozenWithFocus;
223    private boolean mTemporaryDetach;
224    private boolean mDispatchTemporaryDetach;
225
226    private boolean mDiscardNextActionUp = false;
227    private boolean mIgnoreActionUpEvent = false;
228
229    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
230    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
231
232    private float mShadowRadius, mShadowDx, mShadowDy;
233
234    private static final int PREDRAW_NOT_REGISTERED = 0;
235    private static final int PREDRAW_PENDING = 1;
236    private static final int PREDRAW_DONE = 2;
237    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
238
239    private TextUtils.TruncateAt mEllipsize = null;
240
241    // Enum for the "typeface" XML parameter.
242    // TODO: How can we get this from the XML instead of hardcoding it here?
243    private static final int SANS = 1;
244    private static final int SERIF = 2;
245    private static final int MONOSPACE = 3;
246
247    // Bitfield for the "numeric" XML parameter.
248    // TODO: How can we get this from the XML instead of hardcoding it here?
249    private static final int SIGNED = 2;
250    private static final int DECIMAL = 4;
251
252    class Drawables {
253        final Rect mCompoundRect = new Rect();
254        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight;
255        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight;
256        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight;
257        int mDrawablePadding;
258    }
259    private Drawables mDrawables;
260
261    private CharSequence mError;
262    private boolean mErrorWasChanged;
263    private ErrorPopup mPopup;
264    /**
265     * This flag is set if the TextView tries to display an error before it
266     * is attached to the window (so its position is still unknown).
267     * It causes the error to be shown later, when onAttachedToWindow()
268     * is called.
269     */
270    private boolean mShowErrorAfterAttach;
271
272    private CharWrapper mCharWrapper = null;
273
274    private boolean mSelectionMoved = false;
275    private boolean mTouchFocusSelected = false;
276
277    private Marquee mMarquee;
278    private boolean mRestartMarquee;
279
280    private int mMarqueeRepeatLimit = 3;
281
282    class InputContentType {
283        int imeOptions = EditorInfo.IME_NULL;
284        String privateImeOptions;
285        CharSequence imeActionLabel;
286        int imeActionId;
287        Bundle extras;
288        OnEditorActionListener onEditorActionListener;
289        boolean enterDown;
290    }
291    InputContentType mInputContentType;
292
293    class InputMethodState {
294        Rect mCursorRectInWindow = new Rect();
295        RectF mTmpRectF = new RectF();
296        float[] mTmpOffset = new float[2];
297        ExtractedTextRequest mExtracting;
298        final ExtractedText mTmpExtracted = new ExtractedText();
299        int mBatchEditNesting;
300        boolean mCursorChanged;
301        boolean mSelectionModeChanged;
302        boolean mContentChanged;
303        int mChangedStart, mChangedEnd, mChangedDelta;
304    }
305    InputMethodState mInputMethodState;
306
307    int mTextSelectHandleLeftRes;
308    int mTextSelectHandleRightRes;
309    int mTextSelectHandleRes;
310    int mTextEditPasteWindowLayout, mTextEditSidePasteWindowLayout;
311    int mTextEditNoPasteWindowLayout, mTextEditSideNoPasteWindowLayout;
312
313    Drawable mSelectHandleLeft;
314    Drawable mSelectHandleRight;
315    Drawable mSelectHandleCenter;
316
317    private int mLastDownPositionX, mLastDownPositionY;
318    private Callback mCustomSelectionActionModeCallback;
319
320    private final int mSquaredTouchSlopDistance;
321    // Set when this TextView gained focus with some text selected. Will start selection mode.
322    private boolean mCreatedWithASelection = false;
323
324    /*
325     * Kick-start the font cache for the zygote process (to pay the cost of
326     * initializing freetype for our default font only once).
327     */
328    static {
329        Paint p = new Paint();
330        p.setAntiAlias(true);
331        // We don't care about the result, just the side-effect of measuring.
332        p.measureText("H");
333    }
334
335    /**
336     * Interface definition for a callback to be invoked when an action is
337     * performed on the editor.
338     */
339    public interface OnEditorActionListener {
340        /**
341         * Called when an action is being performed.
342         *
343         * @param v The view that was clicked.
344         * @param actionId Identifier of the action.  This will be either the
345         * identifier you supplied, or {@link EditorInfo#IME_NULL
346         * EditorInfo.IME_NULL} if being called due to the enter key
347         * being pressed.
348         * @param event If triggered by an enter key, this is the event;
349         * otherwise, this is null.
350         * @return Return true if you have consumed the action, else false.
351         */
352        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
353    }
354
355    public TextView(Context context) {
356        this(context, null);
357    }
358
359    public TextView(Context context,
360                    AttributeSet attrs) {
361        this(context, attrs, com.android.internal.R.attr.textViewStyle);
362    }
363
364    @SuppressWarnings("deprecation")
365    public TextView(Context context,
366                    AttributeSet attrs,
367                    int defStyle) {
368        super(context, attrs, defStyle);
369        mText = "";
370
371        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
372        mTextPaint.density = getResources().getDisplayMetrics().density;
373        mTextPaint.setCompatibilityScaling(
374                getResources().getCompatibilityInfo().applicationScale);
375
376        // If we get the paint from the skin, we should set it to left, since
377        // the layout always wants it to be left.
378        // mTextPaint.setTextAlign(Paint.Align.LEFT);
379
380        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
381        mHighlightPaint.setCompatibilityScaling(
382                getResources().getCompatibilityInfo().applicationScale);
383
384        mMovement = getDefaultMovementMethod();
385        mTransformation = null;
386
387        TypedArray a =
388            context.obtainStyledAttributes(
389                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
390
391        int textColorHighlight = 0;
392        ColorStateList textColor = null;
393        ColorStateList textColorHint = null;
394        ColorStateList textColorLink = null;
395        int textSize = 15;
396        int typefaceIndex = -1;
397        int styleIndex = -1;
398
399        /*
400         * Look the appearance up without checking first if it exists because
401         * almost every TextView has one and it greatly simplifies the logic
402         * to be able to parse the appearance first and then let specific tags
403         * for this View override it.
404         */
405        TypedArray appearance = null;
406        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
407        if (ap != -1) {
408            appearance = context.obtainStyledAttributes(ap,
409                                com.android.internal.R.styleable.
410                                TextAppearance);
411        }
412        if (appearance != null) {
413            int n = appearance.getIndexCount();
414            for (int i = 0; i < n; i++) {
415                int attr = appearance.getIndex(i);
416
417                switch (attr) {
418                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
419                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
420                    break;
421
422                case com.android.internal.R.styleable.TextAppearance_textColor:
423                    textColor = appearance.getColorStateList(attr);
424                    break;
425
426                case com.android.internal.R.styleable.TextAppearance_textColorHint:
427                    textColorHint = appearance.getColorStateList(attr);
428                    break;
429
430                case com.android.internal.R.styleable.TextAppearance_textColorLink:
431                    textColorLink = appearance.getColorStateList(attr);
432                    break;
433
434                case com.android.internal.R.styleable.TextAppearance_textSize:
435                    textSize = appearance.getDimensionPixelSize(attr, textSize);
436                    break;
437
438                case com.android.internal.R.styleable.TextAppearance_typeface:
439                    typefaceIndex = appearance.getInt(attr, -1);
440                    break;
441
442                case com.android.internal.R.styleable.TextAppearance_textStyle:
443                    styleIndex = appearance.getInt(attr, -1);
444                    break;
445                }
446            }
447
448            appearance.recycle();
449        }
450
451        boolean editable = getDefaultEditable();
452        CharSequence inputMethod = null;
453        int numeric = 0;
454        CharSequence digits = null;
455        boolean phone = false;
456        boolean autotext = false;
457        int autocap = -1;
458        int buffertype = 0;
459        boolean selectallonfocus = false;
460        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
461            drawableBottom = null;
462        int drawablePadding = 0;
463        int ellipsize = -1;
464        boolean singleLine = false;
465        int maxlength = -1;
466        CharSequence text = "";
467        CharSequence hint = null;
468        int shadowcolor = 0;
469        float dx = 0, dy = 0, r = 0;
470        boolean password = false;
471        int inputType = EditorInfo.TYPE_NULL;
472
473        int n = a.getIndexCount();
474        for (int i = 0; i < n; i++) {
475            int attr = a.getIndex(i);
476
477            switch (attr) {
478            case com.android.internal.R.styleable.TextView_editable:
479                editable = a.getBoolean(attr, editable);
480                break;
481
482            case com.android.internal.R.styleable.TextView_inputMethod:
483                inputMethod = a.getText(attr);
484                break;
485
486            case com.android.internal.R.styleable.TextView_numeric:
487                numeric = a.getInt(attr, numeric);
488                break;
489
490            case com.android.internal.R.styleable.TextView_digits:
491                digits = a.getText(attr);
492                break;
493
494            case com.android.internal.R.styleable.TextView_phoneNumber:
495                phone = a.getBoolean(attr, phone);
496                break;
497
498            case com.android.internal.R.styleable.TextView_autoText:
499                autotext = a.getBoolean(attr, autotext);
500                break;
501
502            case com.android.internal.R.styleable.TextView_capitalize:
503                autocap = a.getInt(attr, autocap);
504                break;
505
506            case com.android.internal.R.styleable.TextView_bufferType:
507                buffertype = a.getInt(attr, buffertype);
508                break;
509
510            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
511                selectallonfocus = a.getBoolean(attr, selectallonfocus);
512                break;
513
514            case com.android.internal.R.styleable.TextView_autoLink:
515                mAutoLinkMask = a.getInt(attr, 0);
516                break;
517
518            case com.android.internal.R.styleable.TextView_linksClickable:
519                mLinksClickable = a.getBoolean(attr, true);
520                break;
521
522            case com.android.internal.R.styleable.TextView_drawableLeft:
523                drawableLeft = a.getDrawable(attr);
524                break;
525
526            case com.android.internal.R.styleable.TextView_drawableTop:
527                drawableTop = a.getDrawable(attr);
528                break;
529
530            case com.android.internal.R.styleable.TextView_drawableRight:
531                drawableRight = a.getDrawable(attr);
532                break;
533
534            case com.android.internal.R.styleable.TextView_drawableBottom:
535                drawableBottom = a.getDrawable(attr);
536                break;
537
538            case com.android.internal.R.styleable.TextView_drawablePadding:
539                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
540                break;
541
542            case com.android.internal.R.styleable.TextView_maxLines:
543                setMaxLines(a.getInt(attr, -1));
544                break;
545
546            case com.android.internal.R.styleable.TextView_maxHeight:
547                setMaxHeight(a.getDimensionPixelSize(attr, -1));
548                break;
549
550            case com.android.internal.R.styleable.TextView_lines:
551                setLines(a.getInt(attr, -1));
552                break;
553
554            case com.android.internal.R.styleable.TextView_height:
555                setHeight(a.getDimensionPixelSize(attr, -1));
556                break;
557
558            case com.android.internal.R.styleable.TextView_minLines:
559                setMinLines(a.getInt(attr, -1));
560                break;
561
562            case com.android.internal.R.styleable.TextView_minHeight:
563                setMinHeight(a.getDimensionPixelSize(attr, -1));
564                break;
565
566            case com.android.internal.R.styleable.TextView_maxEms:
567                setMaxEms(a.getInt(attr, -1));
568                break;
569
570            case com.android.internal.R.styleable.TextView_maxWidth:
571                setMaxWidth(a.getDimensionPixelSize(attr, -1));
572                break;
573
574            case com.android.internal.R.styleable.TextView_ems:
575                setEms(a.getInt(attr, -1));
576                break;
577
578            case com.android.internal.R.styleable.TextView_width:
579                setWidth(a.getDimensionPixelSize(attr, -1));
580                break;
581
582            case com.android.internal.R.styleable.TextView_minEms:
583                setMinEms(a.getInt(attr, -1));
584                break;
585
586            case com.android.internal.R.styleable.TextView_minWidth:
587                setMinWidth(a.getDimensionPixelSize(attr, -1));
588                break;
589
590            case com.android.internal.R.styleable.TextView_gravity:
591                setGravity(a.getInt(attr, -1));
592                break;
593
594            case com.android.internal.R.styleable.TextView_hint:
595                hint = a.getText(attr);
596                break;
597
598            case com.android.internal.R.styleable.TextView_text:
599                text = a.getText(attr);
600                break;
601
602            case com.android.internal.R.styleable.TextView_scrollHorizontally:
603                if (a.getBoolean(attr, false)) {
604                    setHorizontallyScrolling(true);
605                }
606                break;
607
608            case com.android.internal.R.styleable.TextView_singleLine:
609                singleLine = a.getBoolean(attr, singleLine);
610                break;
611
612            case com.android.internal.R.styleable.TextView_ellipsize:
613                ellipsize = a.getInt(attr, ellipsize);
614                break;
615
616            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
617                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
618                break;
619
620            case com.android.internal.R.styleable.TextView_includeFontPadding:
621                if (!a.getBoolean(attr, true)) {
622                    setIncludeFontPadding(false);
623                }
624                break;
625
626            case com.android.internal.R.styleable.TextView_cursorVisible:
627                if (!a.getBoolean(attr, true)) {
628                    setCursorVisible(false);
629                }
630                break;
631
632            case com.android.internal.R.styleable.TextView_maxLength:
633                maxlength = a.getInt(attr, -1);
634                break;
635
636            case com.android.internal.R.styleable.TextView_textScaleX:
637                setTextScaleX(a.getFloat(attr, 1.0f));
638                break;
639
640            case com.android.internal.R.styleable.TextView_freezesText:
641                mFreezesText = a.getBoolean(attr, false);
642                break;
643
644            case com.android.internal.R.styleable.TextView_shadowColor:
645                shadowcolor = a.getInt(attr, 0);
646                break;
647
648            case com.android.internal.R.styleable.TextView_shadowDx:
649                dx = a.getFloat(attr, 0);
650                break;
651
652            case com.android.internal.R.styleable.TextView_shadowDy:
653                dy = a.getFloat(attr, 0);
654                break;
655
656            case com.android.internal.R.styleable.TextView_shadowRadius:
657                r = a.getFloat(attr, 0);
658                break;
659
660            case com.android.internal.R.styleable.TextView_enabled:
661                setEnabled(a.getBoolean(attr, isEnabled()));
662                break;
663
664            case com.android.internal.R.styleable.TextView_textColorHighlight:
665                textColorHighlight = a.getColor(attr, textColorHighlight);
666                break;
667
668            case com.android.internal.R.styleable.TextView_textColor:
669                textColor = a.getColorStateList(attr);
670                break;
671
672            case com.android.internal.R.styleable.TextView_textColorHint:
673                textColorHint = a.getColorStateList(attr);
674                break;
675
676            case com.android.internal.R.styleable.TextView_textColorLink:
677                textColorLink = a.getColorStateList(attr);
678                break;
679
680            case com.android.internal.R.styleable.TextView_textSize:
681                textSize = a.getDimensionPixelSize(attr, textSize);
682                break;
683
684            case com.android.internal.R.styleable.TextView_typeface:
685                typefaceIndex = a.getInt(attr, typefaceIndex);
686                break;
687
688            case com.android.internal.R.styleable.TextView_textStyle:
689                styleIndex = a.getInt(attr, styleIndex);
690                break;
691
692            case com.android.internal.R.styleable.TextView_password:
693                password = a.getBoolean(attr, password);
694                break;
695
696            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
697                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
698                break;
699
700            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
701                mSpacingMult = a.getFloat(attr, mSpacingMult);
702                break;
703
704            case com.android.internal.R.styleable.TextView_inputType:
705                inputType = a.getInt(attr, mInputType);
706                break;
707
708            case com.android.internal.R.styleable.TextView_imeOptions:
709                if (mInputContentType == null) {
710                    mInputContentType = new InputContentType();
711                }
712                mInputContentType.imeOptions = a.getInt(attr,
713                        mInputContentType.imeOptions);
714                break;
715
716            case com.android.internal.R.styleable.TextView_imeActionLabel:
717                if (mInputContentType == null) {
718                    mInputContentType = new InputContentType();
719                }
720                mInputContentType.imeActionLabel = a.getText(attr);
721                break;
722
723            case com.android.internal.R.styleable.TextView_imeActionId:
724                if (mInputContentType == null) {
725                    mInputContentType = new InputContentType();
726                }
727                mInputContentType.imeActionId = a.getInt(attr,
728                        mInputContentType.imeActionId);
729                break;
730
731            case com.android.internal.R.styleable.TextView_privateImeOptions:
732                setPrivateImeOptions(a.getString(attr));
733                break;
734
735            case com.android.internal.R.styleable.TextView_editorExtras:
736                try {
737                    setInputExtras(a.getResourceId(attr, 0));
738                } catch (XmlPullParserException e) {
739                    Log.w(LOG_TAG, "Failure reading input extras", e);
740                } catch (IOException e) {
741                    Log.w(LOG_TAG, "Failure reading input extras", e);
742                }
743                break;
744
745            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
746                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
747                break;
748
749            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
750                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
751                break;
752
753            case com.android.internal.R.styleable.TextView_textSelectHandle:
754                mTextSelectHandleRes = a.getResourceId(attr, 0);
755                break;
756
757            case com.android.internal.R.styleable.TextView_textEditPasteWindowLayout:
758                mTextEditPasteWindowLayout = a.getResourceId(attr, 0);
759                break;
760
761            case com.android.internal.R.styleable.TextView_textEditNoPasteWindowLayout:
762                mTextEditNoPasteWindowLayout = a.getResourceId(attr, 0);
763                break;
764
765            case com.android.internal.R.styleable.TextView_textEditSidePasteWindowLayout:
766                mTextEditSidePasteWindowLayout = a.getResourceId(attr, 0);
767                break;
768
769            case com.android.internal.R.styleable.TextView_textEditSideNoPasteWindowLayout:
770                mTextEditSideNoPasteWindowLayout = a.getResourceId(attr, 0);
771                break;
772
773            case com.android.internal.R.styleable.TextView_textIsSelectable:
774                mTextIsSelectable = a.getBoolean(attr, false);
775                break;
776            }
777        }
778        a.recycle();
779
780        BufferType bufferType = BufferType.EDITABLE;
781
782        final int variation =
783                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
784        final boolean passwordInputType = variation
785                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
786        final boolean webPasswordInputType = variation
787                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
788        final boolean numberPasswordInputType = variation
789                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
790
791        if (inputMethod != null) {
792            Class<?> c;
793
794            try {
795                c = Class.forName(inputMethod.toString());
796            } catch (ClassNotFoundException ex) {
797                throw new RuntimeException(ex);
798            }
799
800            try {
801                mInput = (KeyListener) c.newInstance();
802            } catch (InstantiationException ex) {
803                throw new RuntimeException(ex);
804            } catch (IllegalAccessException ex) {
805                throw new RuntimeException(ex);
806            }
807            try {
808                mInputType = inputType != EditorInfo.TYPE_NULL
809                        ? inputType
810                        : mInput.getInputType();
811            } catch (IncompatibleClassChangeError e) {
812                mInputType = EditorInfo.TYPE_CLASS_TEXT;
813            }
814        } else if (digits != null) {
815            mInput = DigitsKeyListener.getInstance(digits.toString());
816            // If no input type was specified, we will default to generic
817            // text, since we can't tell the IME about the set of digits
818            // that was selected.
819            mInputType = inputType != EditorInfo.TYPE_NULL
820                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
821        } else if (inputType != EditorInfo.TYPE_NULL) {
822            setInputType(inputType, true);
823            // If set, the input type overrides what was set using the deprecated singleLine flag.
824            singleLine = !isMultilineInputType(inputType);
825        } else if (phone) {
826            mInput = DialerKeyListener.getInstance();
827            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
828        } else if (numeric != 0) {
829            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
830                                                   (numeric & DECIMAL) != 0);
831            inputType = EditorInfo.TYPE_CLASS_NUMBER;
832            if ((numeric & SIGNED) != 0) {
833                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
834            }
835            if ((numeric & DECIMAL) != 0) {
836                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
837            }
838            mInputType = inputType;
839        } else if (autotext || autocap != -1) {
840            TextKeyListener.Capitalize cap;
841
842            inputType = EditorInfo.TYPE_CLASS_TEXT;
843
844            switch (autocap) {
845            case 1:
846                cap = TextKeyListener.Capitalize.SENTENCES;
847                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
848                break;
849
850            case 2:
851                cap = TextKeyListener.Capitalize.WORDS;
852                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
853                break;
854
855            case 3:
856                cap = TextKeyListener.Capitalize.CHARACTERS;
857                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
858                break;
859
860            default:
861                cap = TextKeyListener.Capitalize.NONE;
862                break;
863            }
864
865            mInput = TextKeyListener.getInstance(autotext, cap);
866            mInputType = inputType;
867        } else if (mTextIsSelectable) {
868            // Prevent text changes from keyboard.
869            mInputType = EditorInfo.TYPE_NULL;
870            mInput = null;
871            bufferType = BufferType.SPANNABLE;
872            // Required to request focus while in touch mode.
873            setFocusableInTouchMode(true);
874            // So that selection can be changed using arrow keys and touch is handled.
875            setMovementMethod(ArrowKeyMovementMethod.getInstance());
876        } else if (editable) {
877            mInput = TextKeyListener.getInstance();
878            mInputType = EditorInfo.TYPE_CLASS_TEXT;
879        } else {
880            mInput = null;
881
882            switch (buffertype) {
883                case 0:
884                    bufferType = BufferType.NORMAL;
885                    break;
886                case 1:
887                    bufferType = BufferType.SPANNABLE;
888                    break;
889                case 2:
890                    bufferType = BufferType.EDITABLE;
891                    break;
892            }
893        }
894
895        // mInputType has been set from inputType, possibly modified by mInputMethod.
896        // Specialize mInputType to [web]password if we have a text class and the original input
897        // type was a password.
898        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
899            if (password || passwordInputType) {
900                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
901                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
902            }
903            if (webPasswordInputType) {
904                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
905                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
906            }
907        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
908            if (numberPasswordInputType) {
909                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
910                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
911            }
912        }
913
914        if (selectallonfocus) {
915            mSelectAllOnFocus = true;
916
917            if (bufferType == BufferType.NORMAL)
918                bufferType = BufferType.SPANNABLE;
919        }
920
921        setCompoundDrawablesWithIntrinsicBounds(
922            drawableLeft, drawableTop, drawableRight, drawableBottom);
923        setCompoundDrawablePadding(drawablePadding);
924
925        // Same as setSingleLine(), but make sure the transformation method and the maximum number
926        // of lines of height are unchanged for multi-line TextViews.
927        setInputTypeSingleLine(singleLine);
928        applySingleLine(singleLine, singleLine, singleLine);
929
930        if (singleLine && mInput == null && ellipsize < 0) {
931                ellipsize = 3; // END
932        }
933
934        switch (ellipsize) {
935            case 1:
936                setEllipsize(TextUtils.TruncateAt.START);
937                break;
938            case 2:
939                setEllipsize(TextUtils.TruncateAt.MIDDLE);
940                break;
941            case 3:
942                setEllipsize(TextUtils.TruncateAt.END);
943                break;
944            case 4:
945                setHorizontalFadingEdgeEnabled(true);
946                setEllipsize(TextUtils.TruncateAt.MARQUEE);
947                break;
948        }
949
950        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
951        setHintTextColor(textColorHint);
952        setLinkTextColor(textColorLink);
953        if (textColorHighlight != 0) {
954            setHighlightColor(textColorHighlight);
955        }
956        setRawTextSize(textSize);
957
958        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
959            setTransformationMethod(PasswordTransformationMethod.getInstance());
960            typefaceIndex = MONOSPACE;
961        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
962                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
963            typefaceIndex = MONOSPACE;
964        }
965
966        setTypefaceByIndex(typefaceIndex, styleIndex);
967
968        if (shadowcolor != 0) {
969            setShadowLayer(r, dx, dy, shadowcolor);
970        }
971
972        if (maxlength >= 0) {
973            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
974        } else {
975            setFilters(NO_FILTERS);
976        }
977
978        setText(text, bufferType);
979        if (hint != null) setHint(hint);
980
981        /*
982         * Views are not normally focusable unless specified to be.
983         * However, TextViews that have input or movement methods *are*
984         * focusable by default.
985         */
986        a = context.obtainStyledAttributes(attrs,
987                                           com.android.internal.R.styleable.View,
988                                           defStyle, 0);
989
990        boolean focusable = mMovement != null || mInput != null;
991        boolean clickable = focusable;
992        boolean longClickable = focusable;
993
994        n = a.getIndexCount();
995        for (int i = 0; i < n; i++) {
996            int attr = a.getIndex(i);
997
998            switch (attr) {
999            case com.android.internal.R.styleable.View_focusable:
1000                focusable = a.getBoolean(attr, focusable);
1001                break;
1002
1003            case com.android.internal.R.styleable.View_clickable:
1004                clickable = a.getBoolean(attr, clickable);
1005                break;
1006
1007            case com.android.internal.R.styleable.View_longClickable:
1008                longClickable = a.getBoolean(attr, longClickable);
1009                break;
1010            }
1011        }
1012        a.recycle();
1013
1014        setFocusable(focusable);
1015        setClickable(clickable);
1016        setLongClickable(longClickable);
1017
1018        prepareCursorControllers();
1019
1020        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1021        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1022        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1023    }
1024
1025    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1026        Typeface tf = null;
1027        switch (typefaceIndex) {
1028            case SANS:
1029                tf = Typeface.SANS_SERIF;
1030                break;
1031
1032            case SERIF:
1033                tf = Typeface.SERIF;
1034                break;
1035
1036            case MONOSPACE:
1037                tf = Typeface.MONOSPACE;
1038                break;
1039        }
1040
1041        setTypeface(tf, styleIndex);
1042    }
1043
1044    @Override
1045    public void setEnabled(boolean enabled) {
1046        if (enabled == isEnabled()) {
1047            return;
1048        }
1049
1050        if (!enabled) {
1051            // Hide the soft input if the currently active TextView is disabled
1052            InputMethodManager imm = InputMethodManager.peekInstance();
1053            if (imm != null && imm.isActive(this)) {
1054                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1055            }
1056        }
1057        super.setEnabled(enabled);
1058    }
1059
1060    /**
1061     * Sets the typeface and style in which the text should be displayed,
1062     * and turns on the fake bold and italic bits in the Paint if the
1063     * Typeface that you provided does not have all the bits in the
1064     * style that you specified.
1065     *
1066     * @attr ref android.R.styleable#TextView_typeface
1067     * @attr ref android.R.styleable#TextView_textStyle
1068     */
1069    public void setTypeface(Typeface tf, int style) {
1070        if (style > 0) {
1071            if (tf == null) {
1072                tf = Typeface.defaultFromStyle(style);
1073            } else {
1074                tf = Typeface.create(tf, style);
1075            }
1076
1077            setTypeface(tf);
1078            // now compute what (if any) algorithmic styling is needed
1079            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1080            int need = style & ~typefaceStyle;
1081            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1082            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1083        } else {
1084            mTextPaint.setFakeBoldText(false);
1085            mTextPaint.setTextSkewX(0);
1086            setTypeface(tf);
1087        }
1088    }
1089
1090    /**
1091     * Subclasses override this to specify that they have a KeyListener
1092     * by default even if not specifically called for in the XML options.
1093     */
1094    protected boolean getDefaultEditable() {
1095        return false;
1096    }
1097
1098    /**
1099     * Subclasses override this to specify a default movement method.
1100     */
1101    protected MovementMethod getDefaultMovementMethod() {
1102        return null;
1103    }
1104
1105    /**
1106     * Return the text the TextView is displaying. If setText() was called with
1107     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1108     * the return value from this method to Spannable or Editable, respectively.
1109     *
1110     * Note: The content of the return value should not be modified. If you want
1111     * a modifiable one, you should make your own copy first.
1112     */
1113    @ViewDebug.CapturedViewProperty
1114    public CharSequence getText() {
1115        return mText;
1116    }
1117
1118    /**
1119     * Returns the length, in characters, of the text managed by this TextView
1120     */
1121    public int length() {
1122        return mText.length();
1123    }
1124
1125    /**
1126     * Return the text the TextView is displaying as an Editable object.  If
1127     * the text is not editable, null is returned.
1128     *
1129     * @see #getText
1130     */
1131    public Editable getEditableText() {
1132        return (mText instanceof Editable) ? (Editable)mText : null;
1133    }
1134
1135    /**
1136     * @return the height of one standard line in pixels.  Note that markup
1137     * within the text can cause individual lines to be taller or shorter
1138     * than this height, and the layout may contain additional first-
1139     * or last-line padding.
1140     */
1141    public int getLineHeight() {
1142        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1143    }
1144
1145    /**
1146     * @return the Layout that is currently being used to display the text.
1147     * This can be null if the text or width has recently changes.
1148     */
1149    public final Layout getLayout() {
1150        return mLayout;
1151    }
1152
1153    /**
1154     * @return the current key listener for this TextView.
1155     * This will frequently be null for non-EditText TextViews.
1156     */
1157    public final KeyListener getKeyListener() {
1158        return mInput;
1159    }
1160
1161    /**
1162     * Sets the key listener to be used with this TextView.  This can be null
1163     * to disallow user input.  Note that this method has significant and
1164     * subtle interactions with soft keyboards and other input method:
1165     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1166     * for important details.  Calling this method will replace the current
1167     * content type of the text view with the content type returned by the
1168     * key listener.
1169     * <p>
1170     * Be warned that if you want a TextView with a key listener or movement
1171     * method not to be focusable, or if you want a TextView without a
1172     * key listener or movement method to be focusable, you must call
1173     * {@link #setFocusable} again after calling this to get the focusability
1174     * back the way you want it.
1175     *
1176     * @attr ref android.R.styleable#TextView_numeric
1177     * @attr ref android.R.styleable#TextView_digits
1178     * @attr ref android.R.styleable#TextView_phoneNumber
1179     * @attr ref android.R.styleable#TextView_inputMethod
1180     * @attr ref android.R.styleable#TextView_capitalize
1181     * @attr ref android.R.styleable#TextView_autoText
1182     */
1183    public void setKeyListener(KeyListener input) {
1184        setKeyListenerOnly(input);
1185        fixFocusableAndClickableSettings();
1186
1187        if (input != null) {
1188            try {
1189                mInputType = mInput.getInputType();
1190            } catch (IncompatibleClassChangeError e) {
1191                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1192            }
1193            // Change inputType, without affecting transformation.
1194            // No need to applySingleLine since mSingleLine is unchanged.
1195            setInputTypeSingleLine(mSingleLine);
1196        } else {
1197            mInputType = EditorInfo.TYPE_NULL;
1198        }
1199
1200        InputMethodManager imm = InputMethodManager.peekInstance();
1201        if (imm != null) imm.restartInput(this);
1202    }
1203
1204    private void setKeyListenerOnly(KeyListener input) {
1205        mInput = input;
1206        if (mInput != null && !(mText instanceof Editable))
1207            setText(mText);
1208
1209        setFilters((Editable) mText, mFilters);
1210    }
1211
1212    /**
1213     * @return the movement method being used for this TextView.
1214     * This will frequently be null for non-EditText TextViews.
1215     */
1216    public final MovementMethod getMovementMethod() {
1217        return mMovement;
1218    }
1219
1220    /**
1221     * Sets the movement method (arrow key handler) to be used for
1222     * this TextView.  This can be null to disallow using the arrow keys
1223     * to move the cursor or scroll the view.
1224     * <p>
1225     * Be warned that if you want a TextView with a key listener or movement
1226     * method not to be focusable, or if you want a TextView without a
1227     * key listener or movement method to be focusable, you must call
1228     * {@link #setFocusable} again after calling this to get the focusability
1229     * back the way you want it.
1230     */
1231    public final void setMovementMethod(MovementMethod movement) {
1232        mMovement = movement;
1233
1234        if (mMovement != null && !(mText instanceof Spannable))
1235            setText(mText);
1236
1237        fixFocusableAndClickableSettings();
1238
1239        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1240        prepareCursorControllers();
1241    }
1242
1243    private void fixFocusableAndClickableSettings() {
1244        if ((mMovement != null) || mInput != null) {
1245            setFocusable(true);
1246            setClickable(true);
1247            setLongClickable(true);
1248        } else {
1249            setFocusable(false);
1250            setClickable(false);
1251            setLongClickable(false);
1252        }
1253    }
1254
1255    /**
1256     * @return the current transformation method for this TextView.
1257     * This will frequently be null except for single-line and password
1258     * fields.
1259     */
1260    public final TransformationMethod getTransformationMethod() {
1261        return mTransformation;
1262    }
1263
1264    /**
1265     * Sets the transformation that is applied to the text that this
1266     * TextView is displaying.
1267     *
1268     * @attr ref android.R.styleable#TextView_password
1269     * @attr ref android.R.styleable#TextView_singleLine
1270     */
1271    public final void setTransformationMethod(TransformationMethod method) {
1272        if (method == mTransformation) {
1273            // Avoid the setText() below if the transformation is
1274            // the same.
1275            return;
1276        }
1277        if (mTransformation != null) {
1278            if (mText instanceof Spannable) {
1279                ((Spannable) mText).removeSpan(mTransformation);
1280            }
1281        }
1282
1283        mTransformation = method;
1284
1285        setText(mText);
1286    }
1287
1288    /**
1289     * Returns the top padding of the view, plus space for the top
1290     * Drawable if any.
1291     */
1292    public int getCompoundPaddingTop() {
1293        final Drawables dr = mDrawables;
1294        if (dr == null || dr.mDrawableTop == null) {
1295            return mPaddingTop;
1296        } else {
1297            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1298        }
1299    }
1300
1301    /**
1302     * Returns the bottom padding of the view, plus space for the bottom
1303     * Drawable if any.
1304     */
1305    public int getCompoundPaddingBottom() {
1306        final Drawables dr = mDrawables;
1307        if (dr == null || dr.mDrawableBottom == null) {
1308            return mPaddingBottom;
1309        } else {
1310            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1311        }
1312    }
1313
1314    /**
1315     * Returns the left padding of the view, plus space for the left
1316     * Drawable if any.
1317     */
1318    public int getCompoundPaddingLeft() {
1319        final Drawables dr = mDrawables;
1320        if (dr == null || dr.mDrawableLeft == null) {
1321            return mPaddingLeft;
1322        } else {
1323            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1324        }
1325    }
1326
1327    /**
1328     * Returns the right padding of the view, plus space for the right
1329     * Drawable if any.
1330     */
1331    public int getCompoundPaddingRight() {
1332        final Drawables dr = mDrawables;
1333        if (dr == null || dr.mDrawableRight == null) {
1334            return mPaddingRight;
1335        } else {
1336            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1337        }
1338    }
1339
1340    /**
1341     * Returns the extended top padding of the view, including both the
1342     * top Drawable if any and any extra space to keep more than maxLines
1343     * of text from showing.  It is only valid to call this after measuring.
1344     */
1345    public int getExtendedPaddingTop() {
1346        if (mMaxMode != LINES) {
1347            return getCompoundPaddingTop();
1348        }
1349
1350        if (mLayout.getLineCount() <= mMaximum) {
1351            return getCompoundPaddingTop();
1352        }
1353
1354        int top = getCompoundPaddingTop();
1355        int bottom = getCompoundPaddingBottom();
1356        int viewht = getHeight() - top - bottom;
1357        int layoutht = mLayout.getLineTop(mMaximum);
1358
1359        if (layoutht >= viewht) {
1360            return top;
1361        }
1362
1363        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1364        if (gravity == Gravity.TOP) {
1365            return top;
1366        } else if (gravity == Gravity.BOTTOM) {
1367            return top + viewht - layoutht;
1368        } else { // (gravity == Gravity.CENTER_VERTICAL)
1369            return top + (viewht - layoutht) / 2;
1370        }
1371    }
1372
1373    /**
1374     * Returns the extended bottom padding of the view, including both the
1375     * bottom Drawable if any and any extra space to keep more than maxLines
1376     * of text from showing.  It is only valid to call this after measuring.
1377     */
1378    public int getExtendedPaddingBottom() {
1379        if (mMaxMode != LINES) {
1380            return getCompoundPaddingBottom();
1381        }
1382
1383        if (mLayout.getLineCount() <= mMaximum) {
1384            return getCompoundPaddingBottom();
1385        }
1386
1387        int top = getCompoundPaddingTop();
1388        int bottom = getCompoundPaddingBottom();
1389        int viewht = getHeight() - top - bottom;
1390        int layoutht = mLayout.getLineTop(mMaximum);
1391
1392        if (layoutht >= viewht) {
1393            return bottom;
1394        }
1395
1396        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1397        if (gravity == Gravity.TOP) {
1398            return bottom + viewht - layoutht;
1399        } else if (gravity == Gravity.BOTTOM) {
1400            return bottom;
1401        } else { // (gravity == Gravity.CENTER_VERTICAL)
1402            return bottom + (viewht - layoutht) / 2;
1403        }
1404    }
1405
1406    /**
1407     * Returns the total left padding of the view, including the left
1408     * Drawable if any.
1409     */
1410    public int getTotalPaddingLeft() {
1411        return getCompoundPaddingLeft();
1412    }
1413
1414    /**
1415     * Returns the total right padding of the view, including the right
1416     * Drawable if any.
1417     */
1418    public int getTotalPaddingRight() {
1419        return getCompoundPaddingRight();
1420    }
1421
1422    /**
1423     * Returns the total top padding of the view, including the top
1424     * Drawable if any, the extra space to keep more than maxLines
1425     * from showing, and the vertical offset for gravity, if any.
1426     */
1427    public int getTotalPaddingTop() {
1428        return getExtendedPaddingTop() + getVerticalOffset(true);
1429    }
1430
1431    /**
1432     * Returns the total bottom padding of the view, including the bottom
1433     * Drawable if any, the extra space to keep more than maxLines
1434     * from showing, and the vertical offset for gravity, if any.
1435     */
1436    public int getTotalPaddingBottom() {
1437        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1438    }
1439
1440    /**
1441     * Sets the Drawables (if any) to appear to the left of, above,
1442     * to the right of, and below the text.  Use null if you do not
1443     * want a Drawable there.  The Drawables must already have had
1444     * {@link Drawable#setBounds} called.
1445     *
1446     * @attr ref android.R.styleable#TextView_drawableLeft
1447     * @attr ref android.R.styleable#TextView_drawableTop
1448     * @attr ref android.R.styleable#TextView_drawableRight
1449     * @attr ref android.R.styleable#TextView_drawableBottom
1450     */
1451    public void setCompoundDrawables(Drawable left, Drawable top,
1452                                     Drawable right, Drawable bottom) {
1453        Drawables dr = mDrawables;
1454
1455        final boolean drawables = left != null || top != null
1456                || right != null || bottom != null;
1457
1458        if (!drawables) {
1459            // Clearing drawables...  can we free the data structure?
1460            if (dr != null) {
1461                if (dr.mDrawablePadding == 0) {
1462                    mDrawables = null;
1463                } else {
1464                    // We need to retain the last set padding, so just clear
1465                    // out all of the fields in the existing structure.
1466                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1467                    dr.mDrawableLeft = null;
1468                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1469                    dr.mDrawableTop = null;
1470                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1471                    dr.mDrawableRight = null;
1472                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1473                    dr.mDrawableBottom = null;
1474                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1475                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1476                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1477                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1478                }
1479            }
1480        } else {
1481            if (dr == null) {
1482                mDrawables = dr = new Drawables();
1483            }
1484
1485            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1486                dr.mDrawableLeft.setCallback(null);
1487            }
1488            dr.mDrawableLeft = left;
1489
1490            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1491                dr.mDrawableTop.setCallback(null);
1492            }
1493            dr.mDrawableTop = top;
1494
1495            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1496                dr.mDrawableRight.setCallback(null);
1497            }
1498            dr.mDrawableRight = right;
1499
1500            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1501                dr.mDrawableBottom.setCallback(null);
1502            }
1503            dr.mDrawableBottom = bottom;
1504
1505            final Rect compoundRect = dr.mCompoundRect;
1506            int[] state;
1507
1508            state = getDrawableState();
1509
1510            if (left != null) {
1511                left.setState(state);
1512                left.copyBounds(compoundRect);
1513                left.setCallback(this);
1514                dr.mDrawableSizeLeft = compoundRect.width();
1515                dr.mDrawableHeightLeft = compoundRect.height();
1516            } else {
1517                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1518            }
1519
1520            if (right != null) {
1521                right.setState(state);
1522                right.copyBounds(compoundRect);
1523                right.setCallback(this);
1524                dr.mDrawableSizeRight = compoundRect.width();
1525                dr.mDrawableHeightRight = compoundRect.height();
1526            } else {
1527                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1528            }
1529
1530            if (top != null) {
1531                top.setState(state);
1532                top.copyBounds(compoundRect);
1533                top.setCallback(this);
1534                dr.mDrawableSizeTop = compoundRect.height();
1535                dr.mDrawableWidthTop = compoundRect.width();
1536            } else {
1537                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1538            }
1539
1540            if (bottom != null) {
1541                bottom.setState(state);
1542                bottom.copyBounds(compoundRect);
1543                bottom.setCallback(this);
1544                dr.mDrawableSizeBottom = compoundRect.height();
1545                dr.mDrawableWidthBottom = compoundRect.width();
1546            } else {
1547                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1548            }
1549        }
1550
1551        invalidate();
1552        requestLayout();
1553    }
1554
1555    /**
1556     * Sets the Drawables (if any) to appear to the left of, above,
1557     * to the right of, and below the text.  Use 0 if you do not
1558     * want a Drawable there. The Drawables' bounds will be set to
1559     * their intrinsic bounds.
1560     *
1561     * @param left Resource identifier of the left Drawable.
1562     * @param top Resource identifier of the top Drawable.
1563     * @param right Resource identifier of the right Drawable.
1564     * @param bottom Resource identifier of the bottom Drawable.
1565     *
1566     * @attr ref android.R.styleable#TextView_drawableLeft
1567     * @attr ref android.R.styleable#TextView_drawableTop
1568     * @attr ref android.R.styleable#TextView_drawableRight
1569     * @attr ref android.R.styleable#TextView_drawableBottom
1570     */
1571    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1572        final Resources resources = getContext().getResources();
1573        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1574                top != 0 ? resources.getDrawable(top) : null,
1575                right != 0 ? resources.getDrawable(right) : null,
1576                bottom != 0 ? resources.getDrawable(bottom) : null);
1577    }
1578
1579    /**
1580     * Sets the Drawables (if any) to appear to the left of, above,
1581     * to the right of, and below the text.  Use null if you do not
1582     * want a Drawable there. The Drawables' bounds will be set to
1583     * their intrinsic bounds.
1584     *
1585     * @attr ref android.R.styleable#TextView_drawableLeft
1586     * @attr ref android.R.styleable#TextView_drawableTop
1587     * @attr ref android.R.styleable#TextView_drawableRight
1588     * @attr ref android.R.styleable#TextView_drawableBottom
1589     */
1590    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1591            Drawable right, Drawable bottom) {
1592
1593        if (left != null) {
1594            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1595        }
1596        if (right != null) {
1597            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1598        }
1599        if (top != null) {
1600            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1601        }
1602        if (bottom != null) {
1603            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1604        }
1605        setCompoundDrawables(left, top, right, bottom);
1606    }
1607
1608    /**
1609     * Returns drawables for the left, top, right, and bottom borders.
1610     */
1611    public Drawable[] getCompoundDrawables() {
1612        final Drawables dr = mDrawables;
1613        if (dr != null) {
1614            return new Drawable[] {
1615                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1616            };
1617        } else {
1618            return new Drawable[] { null, null, null, null };
1619        }
1620    }
1621
1622    /**
1623     * Sets the size of the padding between the compound drawables and
1624     * the text.
1625     *
1626     * @attr ref android.R.styleable#TextView_drawablePadding
1627     */
1628    public void setCompoundDrawablePadding(int pad) {
1629        Drawables dr = mDrawables;
1630        if (pad == 0) {
1631            if (dr != null) {
1632                dr.mDrawablePadding = pad;
1633            }
1634        } else {
1635            if (dr == null) {
1636                mDrawables = dr = new Drawables();
1637            }
1638            dr.mDrawablePadding = pad;
1639        }
1640
1641        invalidate();
1642        requestLayout();
1643    }
1644
1645    /**
1646     * Returns the padding between the compound drawables and the text.
1647     */
1648    public int getCompoundDrawablePadding() {
1649        final Drawables dr = mDrawables;
1650        return dr != null ? dr.mDrawablePadding : 0;
1651    }
1652
1653    @Override
1654    public void setPadding(int left, int top, int right, int bottom) {
1655        if (left != mPaddingLeft ||
1656            right != mPaddingRight ||
1657            top != mPaddingTop ||
1658            bottom != mPaddingBottom) {
1659            nullLayouts();
1660        }
1661
1662        // the super call will requestLayout()
1663        super.setPadding(left, top, right, bottom);
1664        invalidate();
1665    }
1666
1667    /**
1668     * Gets the autolink mask of the text.  See {@link
1669     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1670     * possible values.
1671     *
1672     * @attr ref android.R.styleable#TextView_autoLink
1673     */
1674    public final int getAutoLinkMask() {
1675        return mAutoLinkMask;
1676    }
1677
1678    /**
1679     * Sets the text color, size, style, hint color, and highlight color
1680     * from the specified TextAppearance resource.
1681     */
1682    public void setTextAppearance(Context context, int resid) {
1683        TypedArray appearance =
1684            context.obtainStyledAttributes(resid,
1685                                           com.android.internal.R.styleable.TextAppearance);
1686
1687        int color;
1688        ColorStateList colors;
1689        int ts;
1690
1691        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
1692        if (color != 0) {
1693            setHighlightColor(color);
1694        }
1695
1696        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1697                                              TextAppearance_textColor);
1698        if (colors != null) {
1699            setTextColor(colors);
1700        }
1701
1702        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
1703                                              TextAppearance_textSize, 0);
1704        if (ts != 0) {
1705            setRawTextSize(ts);
1706        }
1707
1708        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1709                                              TextAppearance_textColorHint);
1710        if (colors != null) {
1711            setHintTextColor(colors);
1712        }
1713
1714        colors = appearance.getColorStateList(com.android.internal.R.styleable.
1715                                              TextAppearance_textColorLink);
1716        if (colors != null) {
1717            setLinkTextColor(colors);
1718        }
1719
1720        int typefaceIndex, styleIndex;
1721
1722        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
1723                                          TextAppearance_typeface, -1);
1724        styleIndex = appearance.getInt(com.android.internal.R.styleable.
1725                                       TextAppearance_textStyle, -1);
1726
1727        setTypefaceByIndex(typefaceIndex, styleIndex);
1728
1729        appearance.recycle();
1730    }
1731
1732    /**
1733     * @return the size (in pixels) of the default text size in this TextView.
1734     */
1735    public float getTextSize() {
1736        return mTextPaint.getTextSize();
1737    }
1738
1739    /**
1740     * Set the default text size to the given value, interpreted as "scaled
1741     * pixel" units.  This size is adjusted based on the current density and
1742     * user font size preference.
1743     *
1744     * @param size The scaled pixel size.
1745     *
1746     * @attr ref android.R.styleable#TextView_textSize
1747     */
1748    @android.view.RemotableViewMethod
1749    public void setTextSize(float size) {
1750        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
1751    }
1752
1753    /**
1754     * Set the default text size to a given unit and value.  See {@link
1755     * TypedValue} for the possible dimension units.
1756     *
1757     * @param unit The desired dimension unit.
1758     * @param size The desired size in the given units.
1759     *
1760     * @attr ref android.R.styleable#TextView_textSize
1761     */
1762    public void setTextSize(int unit, float size) {
1763        Context c = getContext();
1764        Resources r;
1765
1766        if (c == null)
1767            r = Resources.getSystem();
1768        else
1769            r = c.getResources();
1770
1771        setRawTextSize(TypedValue.applyDimension(
1772            unit, size, r.getDisplayMetrics()));
1773    }
1774
1775    private void setRawTextSize(float size) {
1776        if (size != mTextPaint.getTextSize()) {
1777            mTextPaint.setTextSize(size);
1778
1779            if (mLayout != null) {
1780                nullLayouts();
1781                requestLayout();
1782                invalidate();
1783            }
1784        }
1785    }
1786
1787    /**
1788     * @return the extent by which text is currently being stretched
1789     * horizontally.  This will usually be 1.
1790     */
1791    public float getTextScaleX() {
1792        return mTextPaint.getTextScaleX();
1793    }
1794
1795    /**
1796     * Sets the extent by which text should be stretched horizontally.
1797     *
1798     * @attr ref android.R.styleable#TextView_textScaleX
1799     */
1800    @android.view.RemotableViewMethod
1801    public void setTextScaleX(float size) {
1802        if (size != mTextPaint.getTextScaleX()) {
1803            mUserSetTextScaleX = true;
1804            mTextPaint.setTextScaleX(size);
1805
1806            if (mLayout != null) {
1807                nullLayouts();
1808                requestLayout();
1809                invalidate();
1810            }
1811        }
1812    }
1813
1814    /**
1815     * Sets the typeface and style in which the text should be displayed.
1816     * Note that not all Typeface families actually have bold and italic
1817     * variants, so you may need to use
1818     * {@link #setTypeface(Typeface, int)} to get the appearance
1819     * that you actually want.
1820     *
1821     * @attr ref android.R.styleable#TextView_typeface
1822     * @attr ref android.R.styleable#TextView_textStyle
1823     */
1824    public void setTypeface(Typeface tf) {
1825        if (mTextPaint.getTypeface() != tf) {
1826            mTextPaint.setTypeface(tf);
1827
1828            if (mLayout != null) {
1829                nullLayouts();
1830                requestLayout();
1831                invalidate();
1832            }
1833        }
1834    }
1835
1836    /**
1837     * @return the current typeface and style in which the text is being
1838     * displayed.
1839     */
1840    public Typeface getTypeface() {
1841        return mTextPaint.getTypeface();
1842    }
1843
1844    /**
1845     * Sets the text color for all the states (normal, selected,
1846     * focused) to be this color.
1847     *
1848     * @attr ref android.R.styleable#TextView_textColor
1849     */
1850    @android.view.RemotableViewMethod
1851    public void setTextColor(int color) {
1852        mTextColor = ColorStateList.valueOf(color);
1853        updateTextColors();
1854    }
1855
1856    /**
1857     * Sets the text color.
1858     *
1859     * @attr ref android.R.styleable#TextView_textColor
1860     */
1861    public void setTextColor(ColorStateList colors) {
1862        if (colors == null) {
1863            throw new NullPointerException();
1864        }
1865
1866        mTextColor = colors;
1867        updateTextColors();
1868    }
1869
1870    /**
1871     * Return the set of text colors.
1872     *
1873     * @return Returns the set of text colors.
1874     */
1875    public final ColorStateList getTextColors() {
1876        return mTextColor;
1877    }
1878
1879    /**
1880     * <p>Return the current color selected for normal text.</p>
1881     *
1882     * @return Returns the current text color.
1883     */
1884    public final int getCurrentTextColor() {
1885        return mCurTextColor;
1886    }
1887
1888    /**
1889     * Sets the color used to display the selection highlight.
1890     *
1891     * @attr ref android.R.styleable#TextView_textColorHighlight
1892     */
1893    @android.view.RemotableViewMethod
1894    public void setHighlightColor(int color) {
1895        if (mHighlightColor != color) {
1896            mHighlightColor = color;
1897            invalidate();
1898        }
1899    }
1900
1901    /**
1902     * Gives the text a shadow of the specified radius and color, the specified
1903     * distance from its normal position.
1904     *
1905     * @attr ref android.R.styleable#TextView_shadowColor
1906     * @attr ref android.R.styleable#TextView_shadowDx
1907     * @attr ref android.R.styleable#TextView_shadowDy
1908     * @attr ref android.R.styleable#TextView_shadowRadius
1909     */
1910    public void setShadowLayer(float radius, float dx, float dy, int color) {
1911        mTextPaint.setShadowLayer(radius, dx, dy, color);
1912
1913        mShadowRadius = radius;
1914        mShadowDx = dx;
1915        mShadowDy = dy;
1916
1917        invalidate();
1918    }
1919
1920    /**
1921     * @return the base paint used for the text.  Please use this only to
1922     * consult the Paint's properties and not to change them.
1923     */
1924    public TextPaint getPaint() {
1925        return mTextPaint;
1926    }
1927
1928    /**
1929     * Sets the autolink mask of the text.  See {@link
1930     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
1931     * possible values.
1932     *
1933     * @attr ref android.R.styleable#TextView_autoLink
1934     */
1935    @android.view.RemotableViewMethod
1936    public final void setAutoLinkMask(int mask) {
1937        mAutoLinkMask = mask;
1938    }
1939
1940    /**
1941     * Sets whether the movement method will automatically be set to
1942     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1943     * set to nonzero and links are detected in {@link #setText}.
1944     * The default is true.
1945     *
1946     * @attr ref android.R.styleable#TextView_linksClickable
1947     */
1948    @android.view.RemotableViewMethod
1949    public final void setLinksClickable(boolean whether) {
1950        mLinksClickable = whether;
1951    }
1952
1953    /**
1954     * Returns whether the movement method will automatically be set to
1955     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
1956     * set to nonzero and links are detected in {@link #setText}.
1957     * The default is true.
1958     *
1959     * @attr ref android.R.styleable#TextView_linksClickable
1960     */
1961    public final boolean getLinksClickable() {
1962        return mLinksClickable;
1963    }
1964
1965    /**
1966     * Returns the list of URLSpans attached to the text
1967     * (by {@link Linkify} or otherwise) if any.  You can call
1968     * {@link URLSpan#getURL} on them to find where they link to
1969     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
1970     * to find the region of the text they are attached to.
1971     */
1972    public URLSpan[] getUrls() {
1973        if (mText instanceof Spanned) {
1974            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
1975        } else {
1976            return new URLSpan[0];
1977        }
1978    }
1979
1980    /**
1981     * Sets the color of the hint text.
1982     *
1983     * @attr ref android.R.styleable#TextView_textColorHint
1984     */
1985    @android.view.RemotableViewMethod
1986    public final void setHintTextColor(int color) {
1987        mHintTextColor = ColorStateList.valueOf(color);
1988        updateTextColors();
1989    }
1990
1991    /**
1992     * Sets the color of the hint text.
1993     *
1994     * @attr ref android.R.styleable#TextView_textColorHint
1995     */
1996    public final void setHintTextColor(ColorStateList colors) {
1997        mHintTextColor = colors;
1998        updateTextColors();
1999    }
2000
2001    /**
2002     * <p>Return the color used to paint the hint text.</p>
2003     *
2004     * @return Returns the list of hint text colors.
2005     */
2006    public final ColorStateList getHintTextColors() {
2007        return mHintTextColor;
2008    }
2009
2010    /**
2011     * <p>Return the current color selected to paint the hint text.</p>
2012     *
2013     * @return Returns the current hint text color.
2014     */
2015    public final int getCurrentHintTextColor() {
2016        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2017    }
2018
2019    /**
2020     * Sets the color of links in the text.
2021     *
2022     * @attr ref android.R.styleable#TextView_textColorLink
2023     */
2024    @android.view.RemotableViewMethod
2025    public final void setLinkTextColor(int color) {
2026        mLinkTextColor = ColorStateList.valueOf(color);
2027        updateTextColors();
2028    }
2029
2030    /**
2031     * Sets the color of links in the text.
2032     *
2033     * @attr ref android.R.styleable#TextView_textColorLink
2034     */
2035    public final void setLinkTextColor(ColorStateList colors) {
2036        mLinkTextColor = colors;
2037        updateTextColors();
2038    }
2039
2040    /**
2041     * <p>Returns the color used to paint links in the text.</p>
2042     *
2043     * @return Returns the list of link text colors.
2044     */
2045    public final ColorStateList getLinkTextColors() {
2046        return mLinkTextColor;
2047    }
2048
2049    /**
2050     * Sets the horizontal alignment of the text and the
2051     * vertical gravity that will be used when there is extra space
2052     * in the TextView beyond what is required for the text itself.
2053     *
2054     * @see android.view.Gravity
2055     * @attr ref android.R.styleable#TextView_gravity
2056     */
2057    public void setGravity(int gravity) {
2058        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
2059            gravity |= Gravity.LEFT;
2060        }
2061        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2062            gravity |= Gravity.TOP;
2063        }
2064
2065        boolean newLayout = false;
2066
2067        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) !=
2068            (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK)) {
2069            newLayout = true;
2070        }
2071
2072        if (gravity != mGravity) {
2073            invalidate();
2074        }
2075
2076        mGravity = gravity;
2077
2078        if (mLayout != null && newLayout) {
2079            // XXX this is heavy-handed because no actual content changes.
2080            int want = mLayout.getWidth();
2081            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2082
2083            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2084                          mRight - mLeft - getCompoundPaddingLeft() -
2085                          getCompoundPaddingRight(), true);
2086        }
2087    }
2088
2089    /**
2090     * Returns the horizontal and vertical alignment of this TextView.
2091     *
2092     * @see android.view.Gravity
2093     * @attr ref android.R.styleable#TextView_gravity
2094     */
2095    public int getGravity() {
2096        return mGravity;
2097    }
2098
2099    /**
2100     * @return the flags on the Paint being used to display the text.
2101     * @see Paint#getFlags
2102     */
2103    public int getPaintFlags() {
2104        return mTextPaint.getFlags();
2105    }
2106
2107    /**
2108     * Sets flags on the Paint being used to display the text and
2109     * reflows the text if they are different from the old flags.
2110     * @see Paint#setFlags
2111     */
2112    @android.view.RemotableViewMethod
2113    public void setPaintFlags(int flags) {
2114        if (mTextPaint.getFlags() != flags) {
2115            mTextPaint.setFlags(flags);
2116
2117            if (mLayout != null) {
2118                nullLayouts();
2119                requestLayout();
2120                invalidate();
2121            }
2122        }
2123    }
2124
2125    /**
2126     * Sets whether the text should be allowed to be wider than the
2127     * View is.  If false, it will be wrapped to the width of the View.
2128     *
2129     * @attr ref android.R.styleable#TextView_scrollHorizontally
2130     */
2131    public void setHorizontallyScrolling(boolean whether) {
2132        mHorizontallyScrolling = whether;
2133
2134        if (mLayout != null) {
2135            nullLayouts();
2136            requestLayout();
2137            invalidate();
2138        }
2139    }
2140
2141    /**
2142     * Makes the TextView at least this many lines tall.
2143     *
2144     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2145     * set this value to 1.
2146     *
2147     * @attr ref android.R.styleable#TextView_minLines
2148     */
2149    @android.view.RemotableViewMethod
2150    public void setMinLines(int minlines) {
2151        mMinimum = minlines;
2152        mMinMode = LINES;
2153
2154        requestLayout();
2155        invalidate();
2156    }
2157
2158    /**
2159     * Makes the TextView at least this many pixels tall.
2160     *
2161     * Setting this value overrides any other (minimum) number of lines setting.
2162     *
2163     * @attr ref android.R.styleable#TextView_minHeight
2164     */
2165    @android.view.RemotableViewMethod
2166    public void setMinHeight(int minHeight) {
2167        mMinimum = minHeight;
2168        mMinMode = PIXELS;
2169
2170        requestLayout();
2171        invalidate();
2172    }
2173
2174    /**
2175     * Makes the TextView at most this many lines tall.
2176     *
2177     * Setting this value overrides any other (maximum) height setting.
2178     *
2179     * @attr ref android.R.styleable#TextView_maxLines
2180     */
2181    @android.view.RemotableViewMethod
2182    public void setMaxLines(int maxlines) {
2183        mMaximum = maxlines;
2184        mMaxMode = LINES;
2185
2186        requestLayout();
2187        invalidate();
2188    }
2189
2190    /**
2191     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2192     * {@link #setMaxLines(int)} method.
2193     *
2194     * Setting this value overrides any other (maximum) number of lines setting.
2195     *
2196     * @attr ref android.R.styleable#TextView_maxHeight
2197     */
2198    @android.view.RemotableViewMethod
2199    public void setMaxHeight(int maxHeight) {
2200        mMaximum = maxHeight;
2201        mMaxMode = PIXELS;
2202
2203        requestLayout();
2204        invalidate();
2205    }
2206
2207    /**
2208     * Makes the TextView exactly this many lines tall.
2209     *
2210     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2211     * height setting. A single line TextView will set this value to 1.
2212     *
2213     * @attr ref android.R.styleable#TextView_lines
2214     */
2215    @android.view.RemotableViewMethod
2216    public void setLines(int lines) {
2217        mMaximum = mMinimum = lines;
2218        mMaxMode = mMinMode = LINES;
2219
2220        requestLayout();
2221        invalidate();
2222    }
2223
2224    /**
2225     * Makes the TextView exactly this many pixels tall.
2226     * You could do the same thing by specifying this number in the
2227     * LayoutParams.
2228     *
2229     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2230     * height setting.
2231     *
2232     * @attr ref android.R.styleable#TextView_height
2233     */
2234    @android.view.RemotableViewMethod
2235    public void setHeight(int pixels) {
2236        mMaximum = mMinimum = pixels;
2237        mMaxMode = mMinMode = PIXELS;
2238
2239        requestLayout();
2240        invalidate();
2241    }
2242
2243    /**
2244     * Makes the TextView at least this many ems wide
2245     *
2246     * @attr ref android.R.styleable#TextView_minEms
2247     */
2248    @android.view.RemotableViewMethod
2249    public void setMinEms(int minems) {
2250        mMinWidth = minems;
2251        mMinWidthMode = EMS;
2252
2253        requestLayout();
2254        invalidate();
2255    }
2256
2257    /**
2258     * Makes the TextView at least this many pixels wide
2259     *
2260     * @attr ref android.R.styleable#TextView_minWidth
2261     */
2262    @android.view.RemotableViewMethod
2263    public void setMinWidth(int minpixels) {
2264        mMinWidth = minpixels;
2265        mMinWidthMode = PIXELS;
2266
2267        requestLayout();
2268        invalidate();
2269    }
2270
2271    /**
2272     * Makes the TextView at most this many ems wide
2273     *
2274     * @attr ref android.R.styleable#TextView_maxEms
2275     */
2276    @android.view.RemotableViewMethod
2277    public void setMaxEms(int maxems) {
2278        mMaxWidth = maxems;
2279        mMaxWidthMode = EMS;
2280
2281        requestLayout();
2282        invalidate();
2283    }
2284
2285    /**
2286     * Makes the TextView at most this many pixels wide
2287     *
2288     * @attr ref android.R.styleable#TextView_maxWidth
2289     */
2290    @android.view.RemotableViewMethod
2291    public void setMaxWidth(int maxpixels) {
2292        mMaxWidth = maxpixels;
2293        mMaxWidthMode = PIXELS;
2294
2295        requestLayout();
2296        invalidate();
2297    }
2298
2299    /**
2300     * Makes the TextView exactly this many ems wide
2301     *
2302     * @attr ref android.R.styleable#TextView_ems
2303     */
2304    @android.view.RemotableViewMethod
2305    public void setEms(int ems) {
2306        mMaxWidth = mMinWidth = ems;
2307        mMaxWidthMode = mMinWidthMode = EMS;
2308
2309        requestLayout();
2310        invalidate();
2311    }
2312
2313    /**
2314     * Makes the TextView exactly this many pixels wide.
2315     * You could do the same thing by specifying this number in the
2316     * LayoutParams.
2317     *
2318     * @attr ref android.R.styleable#TextView_width
2319     */
2320    @android.view.RemotableViewMethod
2321    public void setWidth(int pixels) {
2322        mMaxWidth = mMinWidth = pixels;
2323        mMaxWidthMode = mMinWidthMode = PIXELS;
2324
2325        requestLayout();
2326        invalidate();
2327    }
2328
2329
2330    /**
2331     * Sets line spacing for this TextView.  Each line will have its height
2332     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2333     *
2334     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2335     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2336     */
2337    public void setLineSpacing(float add, float mult) {
2338        mSpacingMult = mult;
2339        mSpacingAdd = add;
2340
2341        if (mLayout != null) {
2342            nullLayouts();
2343            requestLayout();
2344            invalidate();
2345        }
2346    }
2347
2348    /**
2349     * Convenience method: Append the specified text to the TextView's
2350     * display buffer, upgrading it to BufferType.EDITABLE if it was
2351     * not already editable.
2352     */
2353    public final void append(CharSequence text) {
2354        append(text, 0, text.length());
2355    }
2356
2357    /**
2358     * Convenience method: Append the specified text slice to the TextView's
2359     * display buffer, upgrading it to BufferType.EDITABLE if it was
2360     * not already editable.
2361     */
2362    public void append(CharSequence text, int start, int end) {
2363        if (!(mText instanceof Editable)) {
2364            setText(mText, BufferType.EDITABLE);
2365        }
2366
2367        ((Editable) mText).append(text, start, end);
2368    }
2369
2370    private void updateTextColors() {
2371        boolean inval = false;
2372        int color = mTextColor.getColorForState(getDrawableState(), 0);
2373        if (color != mCurTextColor) {
2374            mCurTextColor = color;
2375            inval = true;
2376        }
2377        if (mLinkTextColor != null) {
2378            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2379            if (color != mTextPaint.linkColor) {
2380                mTextPaint.linkColor = color;
2381                inval = true;
2382            }
2383        }
2384        if (mHintTextColor != null) {
2385            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2386            if (color != mCurHintTextColor && mText.length() == 0) {
2387                mCurHintTextColor = color;
2388                inval = true;
2389            }
2390        }
2391        if (inval) {
2392            invalidate();
2393        }
2394    }
2395
2396    @Override
2397    protected void drawableStateChanged() {
2398        super.drawableStateChanged();
2399        if (mTextColor != null && mTextColor.isStateful()
2400                || (mHintTextColor != null && mHintTextColor.isStateful())
2401                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2402            updateTextColors();
2403        }
2404
2405        final Drawables dr = mDrawables;
2406        if (dr != null) {
2407            int[] state = getDrawableState();
2408            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2409                dr.mDrawableTop.setState(state);
2410            }
2411            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2412                dr.mDrawableBottom.setState(state);
2413            }
2414            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2415                dr.mDrawableLeft.setState(state);
2416            }
2417            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2418                dr.mDrawableRight.setState(state);
2419            }
2420        }
2421    }
2422
2423    /**
2424     * User interface state that is stored by TextView for implementing
2425     * {@link View#onSaveInstanceState}.
2426     */
2427    public static class SavedState extends BaseSavedState {
2428        int selStart;
2429        int selEnd;
2430        CharSequence text;
2431        boolean frozenWithFocus;
2432        CharSequence error;
2433
2434        SavedState(Parcelable superState) {
2435            super(superState);
2436        }
2437
2438        @Override
2439        public void writeToParcel(Parcel out, int flags) {
2440            super.writeToParcel(out, flags);
2441            out.writeInt(selStart);
2442            out.writeInt(selEnd);
2443            out.writeInt(frozenWithFocus ? 1 : 0);
2444            TextUtils.writeToParcel(text, out, flags);
2445
2446            if (error == null) {
2447                out.writeInt(0);
2448            } else {
2449                out.writeInt(1);
2450                TextUtils.writeToParcel(error, out, flags);
2451            }
2452        }
2453
2454        @Override
2455        public String toString() {
2456            String str = "TextView.SavedState{"
2457                    + Integer.toHexString(System.identityHashCode(this))
2458                    + " start=" + selStart + " end=" + selEnd;
2459            if (text != null) {
2460                str += " text=" + text;
2461            }
2462            return str + "}";
2463        }
2464
2465        @SuppressWarnings("hiding")
2466        public static final Parcelable.Creator<SavedState> CREATOR
2467                = new Parcelable.Creator<SavedState>() {
2468            public SavedState createFromParcel(Parcel in) {
2469                return new SavedState(in);
2470            }
2471
2472            public SavedState[] newArray(int size) {
2473                return new SavedState[size];
2474            }
2475        };
2476
2477        private SavedState(Parcel in) {
2478            super(in);
2479            selStart = in.readInt();
2480            selEnd = in.readInt();
2481            frozenWithFocus = (in.readInt() != 0);
2482            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2483
2484            if (in.readInt() != 0) {
2485                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2486            }
2487        }
2488    }
2489
2490    @Override
2491    public Parcelable onSaveInstanceState() {
2492        Parcelable superState = super.onSaveInstanceState();
2493
2494        // Save state if we are forced to
2495        boolean save = mFreezesText;
2496        int start = 0;
2497        int end = 0;
2498
2499        if (mText != null) {
2500            start = getSelectionStart();
2501            end = getSelectionEnd();
2502            if (start >= 0 || end >= 0) {
2503                // Or save state if there is a selection
2504                save = true;
2505            }
2506        }
2507
2508        if (save) {
2509            SavedState ss = new SavedState(superState);
2510            // XXX Should also save the current scroll position!
2511            ss.selStart = start;
2512            ss.selEnd = end;
2513
2514            if (mText instanceof Spanned) {
2515                /*
2516                 * Calling setText() strips off any ChangeWatchers;
2517                 * strip them now to avoid leaking references.
2518                 * But do it to a copy so that if there are any
2519                 * further changes to the text of this view, it
2520                 * won't get into an inconsistent state.
2521                 */
2522
2523                Spannable sp = new SpannableString(mText);
2524
2525                for (ChangeWatcher cw :
2526                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2527                    sp.removeSpan(cw);
2528                }
2529
2530                ss.text = sp;
2531            } else {
2532                ss.text = mText.toString();
2533            }
2534
2535            if (isFocused() && start >= 0 && end >= 0) {
2536                ss.frozenWithFocus = true;
2537            }
2538
2539            ss.error = mError;
2540
2541            return ss;
2542        }
2543
2544        return superState;
2545    }
2546
2547    @Override
2548    public void onRestoreInstanceState(Parcelable state) {
2549        if (!(state instanceof SavedState)) {
2550            super.onRestoreInstanceState(state);
2551            return;
2552        }
2553
2554        SavedState ss = (SavedState)state;
2555        super.onRestoreInstanceState(ss.getSuperState());
2556
2557        // XXX restore buffer type too, as well as lots of other stuff
2558        if (ss.text != null) {
2559            setText(ss.text);
2560        }
2561
2562        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2563            if (mText instanceof Spannable) {
2564                int len = mText.length();
2565
2566                if (ss.selStart > len || ss.selEnd > len) {
2567                    String restored = "";
2568
2569                    if (ss.text != null) {
2570                        restored = "(restored) ";
2571                    }
2572
2573                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2574                          "/" + ss.selEnd + " out of range for " + restored +
2575                          "text " + mText);
2576                } else {
2577                    Selection.setSelection((Spannable) mText, ss.selStart,
2578                                           ss.selEnd);
2579
2580                    if (ss.frozenWithFocus) {
2581                        mFrozenWithFocus = true;
2582                    }
2583                }
2584            }
2585        }
2586
2587        if (ss.error != null) {
2588            final CharSequence error = ss.error;
2589            // Display the error later, after the first layout pass
2590            post(new Runnable() {
2591                public void run() {
2592                    setError(error);
2593                }
2594            });
2595        }
2596    }
2597
2598    /**
2599     * Control whether this text view saves its entire text contents when
2600     * freezing to an icicle, in addition to dynamic state such as cursor
2601     * position.  By default this is false, not saving the text.  Set to true
2602     * if the text in the text view is not being saved somewhere else in
2603     * persistent storage (such as in a content provider) so that if the
2604     * view is later thawed the user will not lose their data.
2605     *
2606     * @param freezesText Controls whether a frozen icicle should include the
2607     * entire text data: true to include it, false to not.
2608     *
2609     * @attr ref android.R.styleable#TextView_freezesText
2610     */
2611    @android.view.RemotableViewMethod
2612    public void setFreezesText(boolean freezesText) {
2613        mFreezesText = freezesText;
2614    }
2615
2616    /**
2617     * Return whether this text view is including its entire text contents
2618     * in frozen icicles.
2619     *
2620     * @return Returns true if text is included, false if it isn't.
2621     *
2622     * @see #setFreezesText
2623     */
2624    public boolean getFreezesText() {
2625        return mFreezesText;
2626    }
2627
2628    ///////////////////////////////////////////////////////////////////////////
2629
2630    /**
2631     * Sets the Factory used to create new Editables.
2632     */
2633    public final void setEditableFactory(Editable.Factory factory) {
2634        mEditableFactory = factory;
2635        setText(mText);
2636    }
2637
2638    /**
2639     * Sets the Factory used to create new Spannables.
2640     */
2641    public final void setSpannableFactory(Spannable.Factory factory) {
2642        mSpannableFactory = factory;
2643        setText(mText);
2644    }
2645
2646    /**
2647     * Sets the string value of the TextView. TextView <em>does not</em> accept
2648     * HTML-like formatting, which you can do with text strings in XML resource files.
2649     * To style your strings, attach android.text.style.* objects to a
2650     * {@link android.text.SpannableString SpannableString}, or see the
2651     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
2652     * Available Resource Types</a> documentation for an example of setting
2653     * formatted text in the XML resource file.
2654     *
2655     * @attr ref android.R.styleable#TextView_text
2656     */
2657    @android.view.RemotableViewMethod
2658    public final void setText(CharSequence text) {
2659        setText(text, mBufferType);
2660    }
2661
2662    /**
2663     * Like {@link #setText(CharSequence)},
2664     * except that the cursor position (if any) is retained in the new text.
2665     *
2666     * @param text The new text to place in the text view.
2667     *
2668     * @see #setText(CharSequence)
2669     */
2670    @android.view.RemotableViewMethod
2671    public final void setTextKeepState(CharSequence text) {
2672        setTextKeepState(text, mBufferType);
2673    }
2674
2675    /**
2676     * Sets the text that this TextView is to display (see
2677     * {@link #setText(CharSequence)}) and also sets whether it is stored
2678     * in a styleable/spannable buffer and whether it is editable.
2679     *
2680     * @attr ref android.R.styleable#TextView_text
2681     * @attr ref android.R.styleable#TextView_bufferType
2682     */
2683    public void setText(CharSequence text, BufferType type) {
2684        setText(text, type, true, 0);
2685
2686        if (mCharWrapper != null) {
2687            mCharWrapper.mChars = null;
2688        }
2689    }
2690
2691    private void setText(CharSequence text, BufferType type,
2692                         boolean notifyBefore, int oldlen) {
2693        if (text == null) {
2694            text = "";
2695        }
2696
2697        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
2698
2699        if (text instanceof Spanned &&
2700            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
2701            setHorizontalFadingEdgeEnabled(true);
2702            setEllipsize(TextUtils.TruncateAt.MARQUEE);
2703        }
2704
2705        int n = mFilters.length;
2706        for (int i = 0; i < n; i++) {
2707            CharSequence out = mFilters[i].filter(text, 0, text.length(),
2708                                                  EMPTY_SPANNED, 0, 0);
2709            if (out != null) {
2710                text = out;
2711            }
2712        }
2713
2714        if (notifyBefore) {
2715            if (mText != null) {
2716                oldlen = mText.length();
2717                sendBeforeTextChanged(mText, 0, oldlen, text.length());
2718            } else {
2719                sendBeforeTextChanged("", 0, 0, text.length());
2720            }
2721        }
2722
2723        boolean needEditableForNotification = false;
2724
2725        if (mListeners != null && mListeners.size() != 0) {
2726            needEditableForNotification = true;
2727        }
2728
2729        if (type == BufferType.EDITABLE || mInput != null ||
2730            needEditableForNotification) {
2731            Editable t = mEditableFactory.newEditable(text);
2732            text = t;
2733            setFilters(t, mFilters);
2734            InputMethodManager imm = InputMethodManager.peekInstance();
2735            if (imm != null) imm.restartInput(this);
2736        } else if (type == BufferType.SPANNABLE || mMovement != null) {
2737            text = mSpannableFactory.newSpannable(text);
2738        } else if (!(text instanceof CharWrapper)) {
2739            text = TextUtils.stringOrSpannedString(text);
2740        }
2741
2742        if (mAutoLinkMask != 0) {
2743            Spannable s2;
2744
2745            if (type == BufferType.EDITABLE || text instanceof Spannable) {
2746                s2 = (Spannable) text;
2747            } else {
2748                s2 = mSpannableFactory.newSpannable(text);
2749            }
2750
2751            if (Linkify.addLinks(s2, mAutoLinkMask)) {
2752                text = s2;
2753                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
2754
2755                /*
2756                 * We must go ahead and set the text before changing the
2757                 * movement method, because setMovementMethod() may call
2758                 * setText() again to try to upgrade the buffer type.
2759                 */
2760                mText = text;
2761
2762                // Do not change the movement method for text that support text selection as it
2763                // would prevent an arbitrary cursor displacement.
2764                final boolean hasTextSelection = this instanceof EditText || mTextIsSelectable;
2765                if (mLinksClickable && !hasTextSelection) {
2766                    setMovementMethod(LinkMovementMethod.getInstance());
2767                }
2768            }
2769        }
2770
2771        mBufferType = type;
2772        mText = text;
2773
2774        if (mTransformation == null)
2775            mTransformed = text;
2776        else
2777            mTransformed = mTransformation.getTransformation(text, this);
2778
2779        final int textLength = text.length();
2780
2781        if (text instanceof Spannable) {
2782            Spannable sp = (Spannable) text;
2783
2784            // Remove any ChangeWatchers that might have come
2785            // from other TextViews.
2786            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
2787            final int count = watchers.length;
2788            for (int i = 0; i < count; i++)
2789                sp.removeSpan(watchers[i]);
2790
2791            if (mChangeWatcher == null)
2792                mChangeWatcher = new ChangeWatcher();
2793
2794            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
2795                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
2796
2797            if (mInput != null) {
2798                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2799            }
2800
2801            if (mTransformation != null) {
2802                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2803
2804            }
2805
2806            if (mMovement != null) {
2807                mMovement.initialize(this, (Spannable) text);
2808
2809                /*
2810                 * Initializing the movement method will have set the
2811                 * selection, so reset mSelectionMoved to keep that from
2812                 * interfering with the normal on-focus selection-setting.
2813                 */
2814                mSelectionMoved = false;
2815            }
2816        }
2817
2818        if (mLayout != null) {
2819            checkForRelayout();
2820        }
2821
2822        sendOnTextChanged(text, 0, oldlen, textLength);
2823        onTextChanged(text, 0, oldlen, textLength);
2824
2825        if (needEditableForNotification) {
2826            sendAfterTextChanged((Editable) text);
2827        }
2828
2829        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
2830        prepareCursorControllers();
2831    }
2832
2833    /**
2834     * Sets the TextView to display the specified slice of the specified
2835     * char array.  You must promise that you will not change the contents
2836     * of the array except for right before another call to setText(),
2837     * since the TextView has no way to know that the text
2838     * has changed and that it needs to invalidate and re-layout.
2839     */
2840    public final void setText(char[] text, int start, int len) {
2841        int oldlen = 0;
2842
2843        if (start < 0 || len < 0 || start + len > text.length) {
2844            throw new IndexOutOfBoundsException(start + ", " + len);
2845        }
2846
2847        /*
2848         * We must do the before-notification here ourselves because if
2849         * the old text is a CharWrapper we destroy it before calling
2850         * into the normal path.
2851         */
2852        if (mText != null) {
2853            oldlen = mText.length();
2854            sendBeforeTextChanged(mText, 0, oldlen, len);
2855        } else {
2856            sendBeforeTextChanged("", 0, 0, len);
2857        }
2858
2859        if (mCharWrapper == null) {
2860            mCharWrapper = new CharWrapper(text, start, len);
2861        } else {
2862            mCharWrapper.set(text, start, len);
2863        }
2864
2865        setText(mCharWrapper, mBufferType, false, oldlen);
2866    }
2867
2868    private static class CharWrapper
2869            implements CharSequence, GetChars, GraphicsOperations {
2870        private char[] mChars;
2871        private int mStart, mLength;
2872
2873        public CharWrapper(char[] chars, int start, int len) {
2874            mChars = chars;
2875            mStart = start;
2876            mLength = len;
2877        }
2878
2879        /* package */ void set(char[] chars, int start, int len) {
2880            mChars = chars;
2881            mStart = start;
2882            mLength = len;
2883        }
2884
2885        public int length() {
2886            return mLength;
2887        }
2888
2889        public char charAt(int off) {
2890            return mChars[off + mStart];
2891        }
2892
2893        @Override
2894        public String toString() {
2895            return new String(mChars, mStart, mLength);
2896        }
2897
2898        public CharSequence subSequence(int start, int end) {
2899            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2900                throw new IndexOutOfBoundsException(start + ", " + end);
2901            }
2902
2903            return new String(mChars, start + mStart, end - start);
2904        }
2905
2906        public void getChars(int start, int end, char[] buf, int off) {
2907            if (start < 0 || end < 0 || start > mLength || end > mLength) {
2908                throw new IndexOutOfBoundsException(start + ", " + end);
2909            }
2910
2911            System.arraycopy(mChars, start + mStart, buf, off, end - start);
2912        }
2913
2914        public void drawText(Canvas c, int start, int end,
2915                             float x, float y, Paint p) {
2916            c.drawText(mChars, start + mStart, end - start, x, y, p);
2917        }
2918
2919        public void drawTextRun(Canvas c, int start, int end,
2920                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
2921            int count = end - start;
2922            int contextCount = contextEnd - contextStart;
2923            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
2924                    contextCount, x, y, flags, p);
2925        }
2926
2927        public float measureText(int start, int end, Paint p) {
2928            return p.measureText(mChars, start + mStart, end - start);
2929        }
2930
2931        public int getTextWidths(int start, int end, float[] widths, Paint p) {
2932            return p.getTextWidths(mChars, start + mStart, end - start, widths);
2933        }
2934
2935        public float getTextRunAdvances(int start, int end, int contextStart,
2936                int contextEnd, int flags, float[] advances, int advancesIndex,
2937                Paint p) {
2938            int count = end - start;
2939            int contextCount = contextEnd - contextStart;
2940            return p.getTextRunAdvances(mChars, start + mStart, count,
2941                    contextStart + mStart, contextCount, flags, advances,
2942                    advancesIndex);
2943        }
2944
2945        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
2946                int offset, int cursorOpt, Paint p) {
2947            int contextCount = contextEnd - contextStart;
2948            return p.getTextRunCursor(mChars, contextStart + mStart,
2949                    contextCount, flags, offset + mStart, cursorOpt);
2950        }
2951    }
2952
2953    /**
2954     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
2955     * except that the cursor position (if any) is retained in the new text.
2956     *
2957     * @see #setText(CharSequence, android.widget.TextView.BufferType)
2958     */
2959    public final void setTextKeepState(CharSequence text, BufferType type) {
2960        int start = getSelectionStart();
2961        int end = getSelectionEnd();
2962        int len = text.length();
2963
2964        setText(text, type);
2965
2966        if (start >= 0 || end >= 0) {
2967            if (mText instanceof Spannable) {
2968                Selection.setSelection((Spannable) mText,
2969                                       Math.max(0, Math.min(start, len)),
2970                                       Math.max(0, Math.min(end, len)));
2971            }
2972        }
2973    }
2974
2975    @android.view.RemotableViewMethod
2976    public final void setText(int resid) {
2977        setText(getContext().getResources().getText(resid));
2978    }
2979
2980    public final void setText(int resid, BufferType type) {
2981        setText(getContext().getResources().getText(resid), type);
2982    }
2983
2984    /**
2985     * Sets the text to be displayed when the text of the TextView is empty.
2986     * Null means to use the normal empty text. The hint does not currently
2987     * participate in determining the size of the view.
2988     *
2989     * @attr ref android.R.styleable#TextView_hint
2990     */
2991    @android.view.RemotableViewMethod
2992    public final void setHint(CharSequence hint) {
2993        mHint = TextUtils.stringOrSpannedString(hint);
2994
2995        if (mLayout != null) {
2996            checkForRelayout();
2997        }
2998
2999        if (mText.length() == 0) {
3000            invalidate();
3001        }
3002    }
3003
3004    /**
3005     * Sets the text to be displayed when the text of the TextView is empty,
3006     * from a resource.
3007     *
3008     * @attr ref android.R.styleable#TextView_hint
3009     */
3010    @android.view.RemotableViewMethod
3011    public final void setHint(int resid) {
3012        setHint(getContext().getResources().getText(resid));
3013    }
3014
3015    /**
3016     * Returns the hint that is displayed when the text of the TextView
3017     * is empty.
3018     *
3019     * @attr ref android.R.styleable#TextView_hint
3020     */
3021    @ViewDebug.CapturedViewProperty
3022    public CharSequence getHint() {
3023        return mHint;
3024    }
3025
3026    private boolean isMultilineInputType(int type) {
3027        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3028            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3029    }
3030
3031    /**
3032     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3033     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3034     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3035     * then a soft keyboard will not be displayed for this text view.
3036     *
3037     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3038     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3039     * type.
3040     *
3041     * @see #getInputType()
3042     * @see #setRawInputType(int)
3043     * @see android.text.InputType
3044     * @attr ref android.R.styleable#TextView_inputType
3045     */
3046    public void setInputType(int type) {
3047        final boolean wasPassword = isPasswordInputType(mInputType);
3048        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3049        setInputType(type, false);
3050        final boolean isPassword = isPasswordInputType(type);
3051        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3052        boolean forceUpdate = false;
3053        if (isPassword) {
3054            setTransformationMethod(PasswordTransformationMethod.getInstance());
3055            setTypefaceByIndex(MONOSPACE, 0);
3056        } else if (isVisiblePassword) {
3057            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3058                forceUpdate = true;
3059            }
3060            setTypefaceByIndex(MONOSPACE, 0);
3061        } else if (wasPassword || wasVisiblePassword) {
3062            // not in password mode, clean up typeface and transformation
3063            setTypefaceByIndex(-1, -1);
3064            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3065                forceUpdate = true;
3066            }
3067        }
3068
3069        boolean singleLine = !isMultilineInputType(type);
3070
3071        // We need to update the single line mode if it has changed or we
3072        // were previously in password mode.
3073        if (mSingleLine != singleLine || forceUpdate) {
3074            // Change single line mode, but only change the transformation if
3075            // we are not in password mode.
3076            applySingleLine(singleLine, !isPassword, true);
3077        }
3078
3079        InputMethodManager imm = InputMethodManager.peekInstance();
3080        if (imm != null) imm.restartInput(this);
3081    }
3082
3083    /**
3084     * It would be better to rely on the input type for everything. A password inputType should have
3085     * a password transformation. We should hence use isPasswordInputType instead of this method.
3086     *
3087     * We should:
3088     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3089     * would install the correct transformation).
3090     * - Refuse the installation of a non-password transformation in setTransformation if the input
3091     * type is password.
3092     *
3093     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3094     * is useful since it matches what the user can see (obfuscated text or not).
3095     *
3096     * @return true if the current transformation method is of the password type.
3097     */
3098    private boolean hasPasswordTransformationMethod() {
3099        return mTransformation instanceof PasswordTransformationMethod;
3100    }
3101
3102    private boolean isPasswordInputType(int inputType) {
3103        final int variation =
3104                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3105        return variation
3106                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3107                || variation
3108                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3109                || variation
3110                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3111    }
3112
3113    private boolean isVisiblePasswordInputType(int inputType) {
3114        final int variation =
3115                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3116        return variation
3117                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3118    }
3119
3120    /**
3121     * Directly change the content type integer of the text view, without
3122     * modifying any other state.
3123     * @see #setInputType(int)
3124     * @see android.text.InputType
3125     * @attr ref android.R.styleable#TextView_inputType
3126     */
3127    public void setRawInputType(int type) {
3128        mInputType = type;
3129    }
3130
3131    private void setInputType(int type, boolean direct) {
3132        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3133        KeyListener input;
3134        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3135            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3136            TextKeyListener.Capitalize cap;
3137            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3138                cap = TextKeyListener.Capitalize.CHARACTERS;
3139            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3140                cap = TextKeyListener.Capitalize.WORDS;
3141            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3142                cap = TextKeyListener.Capitalize.SENTENCES;
3143            } else {
3144                cap = TextKeyListener.Capitalize.NONE;
3145            }
3146            input = TextKeyListener.getInstance(autotext, cap);
3147        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3148            input = DigitsKeyListener.getInstance(
3149                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3150                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3151        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3152            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3153                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3154                    input = DateKeyListener.getInstance();
3155                    break;
3156                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3157                    input = TimeKeyListener.getInstance();
3158                    break;
3159                default:
3160                    input = DateTimeKeyListener.getInstance();
3161                    break;
3162            }
3163        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3164            input = DialerKeyListener.getInstance();
3165        } else {
3166            input = TextKeyListener.getInstance();
3167        }
3168        setRawInputType(type);
3169        if (direct) mInput = input;
3170        else {
3171            setKeyListenerOnly(input);
3172        }
3173    }
3174
3175    /**
3176     * Get the type of the content.
3177     *
3178     * @see #setInputType(int)
3179     * @see android.text.InputType
3180     */
3181    public int getInputType() {
3182        return mInputType;
3183    }
3184
3185    /**
3186     * Change the editor type integer associated with the text view, which
3187     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3188     * has focus.
3189     * @see #getImeOptions
3190     * @see android.view.inputmethod.EditorInfo
3191     * @attr ref android.R.styleable#TextView_imeOptions
3192     */
3193    public void setImeOptions(int imeOptions) {
3194        if (mInputContentType == null) {
3195            mInputContentType = new InputContentType();
3196        }
3197        mInputContentType.imeOptions = imeOptions;
3198    }
3199
3200    /**
3201     * Get the type of the IME editor.
3202     *
3203     * @see #setImeOptions(int)
3204     * @see android.view.inputmethod.EditorInfo
3205     */
3206    public int getImeOptions() {
3207        return mInputContentType != null
3208                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3209    }
3210
3211    /**
3212     * Change the custom IME action associated with the text view, which
3213     * will be reported to an IME with {@link EditorInfo#actionLabel}
3214     * and {@link EditorInfo#actionId} when it has focus.
3215     * @see #getImeActionLabel
3216     * @see #getImeActionId
3217     * @see android.view.inputmethod.EditorInfo
3218     * @attr ref android.R.styleable#TextView_imeActionLabel
3219     * @attr ref android.R.styleable#TextView_imeActionId
3220     */
3221    public void setImeActionLabel(CharSequence label, int actionId) {
3222        if (mInputContentType == null) {
3223            mInputContentType = new InputContentType();
3224        }
3225        mInputContentType.imeActionLabel = label;
3226        mInputContentType.imeActionId = actionId;
3227    }
3228
3229    /**
3230     * Get the IME action label previous set with {@link #setImeActionLabel}.
3231     *
3232     * @see #setImeActionLabel
3233     * @see android.view.inputmethod.EditorInfo
3234     */
3235    public CharSequence getImeActionLabel() {
3236        return mInputContentType != null
3237                ? mInputContentType.imeActionLabel : null;
3238    }
3239
3240    /**
3241     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3242     *
3243     * @see #setImeActionLabel
3244     * @see android.view.inputmethod.EditorInfo
3245     */
3246    public int getImeActionId() {
3247        return mInputContentType != null
3248                ? mInputContentType.imeActionId : 0;
3249    }
3250
3251    /**
3252     * Set a special listener to be called when an action is performed
3253     * on the text view.  This will be called when the enter key is pressed,
3254     * or when an action supplied to the IME is selected by the user.  Setting
3255     * this means that the normal hard key event will not insert a newline
3256     * into the text view, even if it is multi-line; holding down the ALT
3257     * modifier will, however, allow the user to insert a newline character.
3258     */
3259    public void setOnEditorActionListener(OnEditorActionListener l) {
3260        if (mInputContentType == null) {
3261            mInputContentType = new InputContentType();
3262        }
3263        mInputContentType.onEditorActionListener = l;
3264    }
3265
3266    /**
3267     * Called when an attached input method calls
3268     * {@link InputConnection#performEditorAction(int)
3269     * InputConnection.performEditorAction()}
3270     * for this text view.  The default implementation will call your action
3271     * listener supplied to {@link #setOnEditorActionListener}, or perform
3272     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3273     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3274     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3275     * EditorInfo.IME_ACTION_DONE}.
3276     *
3277     * <p>For backwards compatibility, if no IME options have been set and the
3278     * text view would not normally advance focus on enter, then
3279     * the NEXT and DONE actions received here will be turned into an enter
3280     * key down/up pair to go through the normal key handling.
3281     *
3282     * @param actionCode The code of the action being performed.
3283     *
3284     * @see #setOnEditorActionListener
3285     */
3286    public void onEditorAction(int actionCode) {
3287        final InputContentType ict = mInputContentType;
3288        if (ict != null) {
3289            if (ict.onEditorActionListener != null) {
3290                if (ict.onEditorActionListener.onEditorAction(this,
3291                        actionCode, null)) {
3292                    return;
3293                }
3294            }
3295
3296            // This is the handling for some default action.
3297            // Note that for backwards compatibility we don't do this
3298            // default handling if explicit ime options have not been given,
3299            // instead turning this into the normal enter key codes that an
3300            // app may be expecting.
3301            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3302                View v = focusSearch(FOCUS_DOWN);
3303                if (v != null) {
3304                    if (!v.requestFocus(FOCUS_DOWN)) {
3305                        throw new IllegalStateException("focus search returned a view " +
3306                                "that wasn't able to take focus!");
3307                    }
3308                }
3309                return;
3310
3311            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3312                View v = focusSearch(FOCUS_UP);
3313                if (v != null) {
3314                    if (!v.requestFocus(FOCUS_UP)) {
3315                        throw new IllegalStateException("focus search returned a view " +
3316                                "that wasn't able to take focus!");
3317                    }
3318                }
3319                return;
3320
3321            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3322                InputMethodManager imm = InputMethodManager.peekInstance();
3323                if (imm != null) {
3324                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3325                }
3326                return;
3327            }
3328        }
3329
3330        Handler h = getHandler();
3331        if (h != null) {
3332            long eventTime = SystemClock.uptimeMillis();
3333            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3334                    new KeyEvent(eventTime, eventTime,
3335                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3336                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3337                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3338                    | KeyEvent.FLAG_EDITOR_ACTION)));
3339            h.sendMessage(h.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
3340                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3341                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3342                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3343                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3344                    | KeyEvent.FLAG_EDITOR_ACTION)));
3345        }
3346    }
3347
3348    /**
3349     * Set the private content type of the text, which is the
3350     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3351     * field that will be filled in when creating an input connection.
3352     *
3353     * @see #getPrivateImeOptions()
3354     * @see EditorInfo#privateImeOptions
3355     * @attr ref android.R.styleable#TextView_privateImeOptions
3356     */
3357    public void setPrivateImeOptions(String type) {
3358        if (mInputContentType == null) mInputContentType = new InputContentType();
3359        mInputContentType.privateImeOptions = type;
3360    }
3361
3362    /**
3363     * Get the private type of the content.
3364     *
3365     * @see #setPrivateImeOptions(String)
3366     * @see EditorInfo#privateImeOptions
3367     */
3368    public String getPrivateImeOptions() {
3369        return mInputContentType != null
3370                ? mInputContentType.privateImeOptions : null;
3371    }
3372
3373    /**
3374     * Set the extra input data of the text, which is the
3375     * {@link EditorInfo#extras TextBoxAttribute.extras}
3376     * Bundle that will be filled in when creating an input connection.  The
3377     * given integer is the resource ID of an XML resource holding an
3378     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3379     *
3380     * @see #getInputExtras(boolean)
3381     * @see EditorInfo#extras
3382     * @attr ref android.R.styleable#TextView_editorExtras
3383     */
3384    public void setInputExtras(int xmlResId)
3385            throws XmlPullParserException, IOException {
3386        XmlResourceParser parser = getResources().getXml(xmlResId);
3387        if (mInputContentType == null) mInputContentType = new InputContentType();
3388        mInputContentType.extras = new Bundle();
3389        getResources().parseBundleExtras(parser, mInputContentType.extras);
3390    }
3391
3392    /**
3393     * Retrieve the input extras currently associated with the text view, which
3394     * can be viewed as well as modified.
3395     *
3396     * @param create If true, the extras will be created if they don't already
3397     * exist.  Otherwise, null will be returned if none have been created.
3398     * @see #setInputExtras(int)
3399     * @see EditorInfo#extras
3400     * @attr ref android.R.styleable#TextView_editorExtras
3401     */
3402    public Bundle getInputExtras(boolean create) {
3403        if (mInputContentType == null) {
3404            if (!create) return null;
3405            mInputContentType = new InputContentType();
3406        }
3407        if (mInputContentType.extras == null) {
3408            if (!create) return null;
3409            mInputContentType.extras = new Bundle();
3410        }
3411        return mInputContentType.extras;
3412    }
3413
3414    /**
3415     * Returns the error message that was set to be displayed with
3416     * {@link #setError}, or <code>null</code> if no error was set
3417     * or if it the error was cleared by the widget after user input.
3418     */
3419    public CharSequence getError() {
3420        return mError;
3421    }
3422
3423    /**
3424     * Sets the right-hand compound drawable of the TextView to the "error"
3425     * icon and sets an error message that will be displayed in a popup when
3426     * the TextView has focus.  The icon and error message will be reset to
3427     * null when any key events cause changes to the TextView's text.  If the
3428     * <code>error</code> is <code>null</code>, the error message and icon
3429     * will be cleared.
3430     */
3431    @android.view.RemotableViewMethod
3432    public void setError(CharSequence error) {
3433        if (error == null) {
3434            setError(null, null);
3435        } else {
3436            Drawable dr = getContext().getResources().
3437                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3438
3439            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3440            setError(error, dr);
3441        }
3442    }
3443
3444    /**
3445     * Sets the right-hand compound drawable of the TextView to the specified
3446     * icon and sets an error message that will be displayed in a popup when
3447     * the TextView has focus.  The icon and error message will be reset to
3448     * null when any key events cause changes to the TextView's text.  The
3449     * drawable must already have had {@link Drawable#setBounds} set on it.
3450     * If the <code>error</code> is <code>null</code>, the error message will
3451     * be cleared (and you should provide a <code>null</code> icon as well).
3452     */
3453    public void setError(CharSequence error, Drawable icon) {
3454        error = TextUtils.stringOrSpannedString(error);
3455
3456        mError = error;
3457        mErrorWasChanged = true;
3458        final Drawables dr = mDrawables;
3459        if (dr != null) {
3460            setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon, dr.mDrawableBottom);
3461        } else {
3462            setCompoundDrawables(null, null, icon, null);
3463        }
3464
3465        if (error == null) {
3466            if (mPopup != null) {
3467                if (mPopup.isShowing()) {
3468                    mPopup.dismiss();
3469                }
3470
3471                mPopup = null;
3472            }
3473        } else {
3474            if (isFocused()) {
3475                showError();
3476            }
3477        }
3478    }
3479
3480    private void showError() {
3481        if (getWindowToken() == null) {
3482            mShowErrorAfterAttach = true;
3483            return;
3484        }
3485
3486        if (mPopup == null) {
3487            LayoutInflater inflater = LayoutInflater.from(getContext());
3488            final TextView err = (TextView) inflater.inflate(
3489                    com.android.internal.R.layout.textview_hint, null);
3490
3491            final float scale = getResources().getDisplayMetrics().density;
3492            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f),
3493                    (int) (50 * scale + 0.5f));
3494            mPopup.setFocusable(false);
3495            // The user is entering text, so the input method is needed.  We
3496            // don't want the popup to be displayed on top of it.
3497            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3498        }
3499
3500        TextView tv = (TextView) mPopup.getContentView();
3501        chooseSize(mPopup, mError, tv);
3502        tv.setText(mError);
3503
3504        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3505        mPopup.fixDirection(mPopup.isAboveAnchor());
3506    }
3507
3508    private static class ErrorPopup extends PopupWindow {
3509        private boolean mAbove = false;
3510        private final TextView mView;
3511
3512        ErrorPopup(TextView v, int width, int height) {
3513            super(v, width, height);
3514            mView = v;
3515        }
3516
3517        void fixDirection(boolean above) {
3518            mAbove = above;
3519
3520            if (above) {
3521                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error_above);
3522            } else {
3523                mView.setBackgroundResource(com.android.internal.R.drawable.popup_inline_error);
3524            }
3525        }
3526
3527        @Override
3528        public void update(int x, int y, int w, int h, boolean force) {
3529            super.update(x, y, w, h, force);
3530
3531            boolean above = isAboveAnchor();
3532            if (above != mAbove) {
3533                fixDirection(above);
3534            }
3535        }
3536    }
3537
3538    /**
3539     * Returns the Y offset to make the pointy top of the error point
3540     * at the middle of the error icon.
3541     */
3542    private int getErrorX() {
3543        /*
3544         * The "25" is the distance between the point and the right edge
3545         * of the background
3546         */
3547        final float scale = getResources().getDisplayMetrics().density;
3548
3549        final Drawables dr = mDrawables;
3550        return getWidth() - mPopup.getWidth()
3551                - getPaddingRight()
3552                - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3553    }
3554
3555    /**
3556     * Returns the Y offset to make the pointy top of the error point
3557     * at the bottom of the error icon.
3558     */
3559    private int getErrorY() {
3560        /*
3561         * Compound, not extended, because the icon is not clipped
3562         * if the text height is smaller.
3563         */
3564        int vspace = mBottom - mTop -
3565                     getCompoundPaddingBottom() - getCompoundPaddingTop();
3566
3567        final Drawables dr = mDrawables;
3568        int icontop = getCompoundPaddingTop()
3569                + (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3570
3571        /*
3572         * The "2" is the distance between the point and the top edge
3573         * of the background.
3574         */
3575
3576        return icontop + (dr != null ? dr.mDrawableHeightRight : 0)
3577                - getHeight() - 2;
3578    }
3579
3580    private void hideError() {
3581        if (mPopup != null) {
3582            if (mPopup.isShowing()) {
3583                mPopup.dismiss();
3584            }
3585        }
3586
3587        mShowErrorAfterAttach = false;
3588    }
3589
3590    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
3591        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
3592        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
3593
3594        /*
3595         * Figure out how big the text would be if we laid it out to the
3596         * full width of this view minus the border.
3597         */
3598        int cap = getWidth() - wid;
3599        if (cap < 0) {
3600            cap = 200; // We must not be measured yet -- setFrame() will fix it.
3601        }
3602
3603        Layout l = new StaticLayout(text, tv.getPaint(), cap,
3604                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
3605        float max = 0;
3606        for (int i = 0; i < l.getLineCount(); i++) {
3607            max = Math.max(max, l.getLineWidth(i));
3608        }
3609
3610        /*
3611         * Now set the popup size to be big enough for the text plus the border.
3612         */
3613        pop.setWidth(wid + (int) Math.ceil(max));
3614        pop.setHeight(ht + l.getHeight());
3615    }
3616
3617
3618    @Override
3619    protected boolean setFrame(int l, int t, int r, int b) {
3620        boolean result = super.setFrame(l, t, r, b);
3621
3622        if (mPopup != null) {
3623            TextView tv = (TextView) mPopup.getContentView();
3624            chooseSize(mPopup, mError, tv);
3625            mPopup.update(this, getErrorX(), getErrorY(),
3626                          mPopup.getWidth(), mPopup.getHeight());
3627        }
3628
3629        restartMarqueeIfNeeded();
3630
3631        return result;
3632    }
3633
3634    private void restartMarqueeIfNeeded() {
3635        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
3636            mRestartMarquee = false;
3637            startMarquee();
3638        }
3639    }
3640
3641    /**
3642     * Sets the list of input filters that will be used if the buffer is
3643     * Editable.  Has no effect otherwise.
3644     *
3645     * @attr ref android.R.styleable#TextView_maxLength
3646     */
3647    public void setFilters(InputFilter[] filters) {
3648        if (filters == null) {
3649            throw new IllegalArgumentException();
3650        }
3651
3652        mFilters = filters;
3653
3654        if (mText instanceof Editable) {
3655            setFilters((Editable) mText, filters);
3656        }
3657    }
3658
3659    /**
3660     * Sets the list of input filters on the specified Editable,
3661     * and includes mInput in the list if it is an InputFilter.
3662     */
3663    private void setFilters(Editable e, InputFilter[] filters) {
3664        if (mInput instanceof InputFilter) {
3665            InputFilter[] nf = new InputFilter[filters.length + 1];
3666
3667            System.arraycopy(filters, 0, nf, 0, filters.length);
3668            nf[filters.length] = (InputFilter) mInput;
3669
3670            e.setFilters(nf);
3671        } else {
3672            e.setFilters(filters);
3673        }
3674    }
3675
3676    /**
3677     * Returns the current list of input filters.
3678     */
3679    public InputFilter[] getFilters() {
3680        return mFilters;
3681    }
3682
3683    /////////////////////////////////////////////////////////////////////////
3684
3685    private int getVerticalOffset(boolean forceNormal) {
3686        int voffset = 0;
3687        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3688
3689        Layout l = mLayout;
3690        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3691            l = mHintLayout;
3692        }
3693
3694        if (gravity != Gravity.TOP) {
3695            int boxht;
3696
3697            if (l == mHintLayout) {
3698                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3699                        getCompoundPaddingBottom();
3700            } else {
3701                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3702                        getExtendedPaddingBottom();
3703            }
3704            int textht = l.getHeight();
3705
3706            if (textht < boxht) {
3707                if (gravity == Gravity.BOTTOM)
3708                    voffset = boxht - textht;
3709                else // (gravity == Gravity.CENTER_VERTICAL)
3710                    voffset = (boxht - textht) >> 1;
3711            }
3712        }
3713        return voffset;
3714    }
3715
3716    private int getBottomVerticalOffset(boolean forceNormal) {
3717        int voffset = 0;
3718        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
3719
3720        Layout l = mLayout;
3721        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
3722            l = mHintLayout;
3723        }
3724
3725        if (gravity != Gravity.BOTTOM) {
3726            int boxht;
3727
3728            if (l == mHintLayout) {
3729                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
3730                        getCompoundPaddingBottom();
3731            } else {
3732                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
3733                        getExtendedPaddingBottom();
3734            }
3735            int textht = l.getHeight();
3736
3737            if (textht < boxht) {
3738                if (gravity == Gravity.TOP)
3739                    voffset = boxht - textht;
3740                else // (gravity == Gravity.CENTER_VERTICAL)
3741                    voffset = (boxht - textht) >> 1;
3742            }
3743        }
3744        return voffset;
3745    }
3746
3747    private void invalidateCursorPath() {
3748        if (mHighlightPathBogus) {
3749            invalidateCursor();
3750        } else {
3751            synchronized (sTempRect) {
3752                /*
3753                 * The reason for this concern about the thickness of the
3754                 * cursor and doing the floor/ceil on the coordinates is that
3755                 * some EditTexts (notably textfields in the Browser) have
3756                 * anti-aliased text where not all the characters are
3757                 * necessarily at integer-multiple locations.  This should
3758                 * make sure the entire cursor gets invalidated instead of
3759                 * sometimes missing half a pixel.
3760                 */
3761
3762                float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
3763                if (thick < 1.0f) {
3764                    thick = 1.0f;
3765                }
3766
3767                thick /= 2;
3768
3769                mHighlightPath.computeBounds(sTempRect, false);
3770
3771                int left = getCompoundPaddingLeft();
3772                int top = getExtendedPaddingTop() + getVerticalOffset(true);
3773
3774                invalidate((int) FloatMath.floor(left + sTempRect.left - thick),
3775                           (int) FloatMath.floor(top + sTempRect.top - thick),
3776                           (int) FloatMath.ceil(left + sTempRect.right + thick),
3777                           (int) FloatMath.ceil(top + sTempRect.bottom + thick));
3778            }
3779        }
3780    }
3781
3782    private void invalidateCursor() {
3783        int where = getSelectionEnd();
3784
3785        invalidateCursor(where, where, where);
3786    }
3787
3788    private void invalidateCursor(int a, int b, int c) {
3789        if (mLayout == null) {
3790            invalidate();
3791        } else {
3792            if (a >= 0 || b >= 0 || c >= 0) {
3793                int first = Math.min(Math.min(a, b), c);
3794                int last = Math.max(Math.max(a, b), c);
3795
3796                int line = mLayout.getLineForOffset(first);
3797                int top = mLayout.getLineTop(line);
3798
3799                // This is ridiculous, but the descent from the line above
3800                // can hang down into the line we really want to redraw,
3801                // so we have to invalidate part of the line above to make
3802                // sure everything that needs to be redrawn really is.
3803                // (But not the whole line above, because that would cause
3804                // the same problem with the descenders on the line above it!)
3805                if (line > 0) {
3806                    top -= mLayout.getLineDescent(line - 1);
3807                }
3808
3809                int line2;
3810
3811                if (first == last)
3812                    line2 = line;
3813                else
3814                    line2 = mLayout.getLineForOffset(last);
3815
3816                int bottom = mLayout.getLineTop(line2 + 1);
3817                int voffset = getVerticalOffset(true);
3818
3819                int left = getCompoundPaddingLeft() + mScrollX;
3820                invalidate(left, top + voffset + getExtendedPaddingTop(),
3821                           left + getWidth() - getCompoundPaddingLeft() -
3822                           getCompoundPaddingRight(),
3823                           bottom + voffset + getExtendedPaddingTop());
3824            }
3825        }
3826    }
3827
3828    private void registerForPreDraw() {
3829        final ViewTreeObserver observer = getViewTreeObserver();
3830        if (observer == null) {
3831            return;
3832        }
3833
3834        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
3835            observer.addOnPreDrawListener(this);
3836            mPreDrawState = PREDRAW_PENDING;
3837        } else if (mPreDrawState == PREDRAW_DONE) {
3838            mPreDrawState = PREDRAW_PENDING;
3839        }
3840
3841        // else state is PREDRAW_PENDING, so keep waiting.
3842    }
3843
3844    /**
3845     * {@inheritDoc}
3846     */
3847    public boolean onPreDraw() {
3848        if (mPreDrawState != PREDRAW_PENDING) {
3849            return true;
3850        }
3851
3852        if (mLayout == null) {
3853            assumeLayout();
3854        }
3855
3856        boolean changed = false;
3857
3858        if (mMovement != null) {
3859            /* This code also provides auto-scrolling when a cursor is moved using a
3860             * CursorController (insertion point or selection limits).
3861             * For selection, ensure start or end is visible depending on controller's state.
3862             */
3863            int curs = getSelectionEnd();
3864            // Do not create the controller if it is not already created.
3865            if (mSelectionModifierCursorController != null &&
3866                    mSelectionModifierCursorController.isSelectionStartDragged()) {
3867                curs = getSelectionStart();
3868            }
3869
3870            /*
3871             * TODO: This should really only keep the end in view if
3872             * it already was before the text changed.  I'm not sure
3873             * of a good way to tell from here if it was.
3874             */
3875            if (curs < 0 &&
3876                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
3877                curs = mText.length();
3878            }
3879
3880            if (curs >= 0) {
3881                changed = bringPointIntoView(curs);
3882            }
3883        } else {
3884            changed = bringTextIntoView();
3885        }
3886
3887        // This has to be checked here since:
3888        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
3889        //   a screen rotation) since layout is not yet initialized at that point.
3890        if (mCreatedWithASelection) {
3891            startSelectionActionMode();
3892            mCreatedWithASelection = false;
3893        }
3894
3895        // Phone specific code (there is no ExtractEditText on tablets).
3896        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
3897        // not be set. Do the test here instead.
3898        if (this instanceof ExtractEditText && hasSelection()) {
3899            startSelectionActionMode();
3900        }
3901
3902        mPreDrawState = PREDRAW_DONE;
3903        return !changed;
3904    }
3905
3906    @Override
3907    protected void onAttachedToWindow() {
3908        super.onAttachedToWindow();
3909
3910        mTemporaryDetach = false;
3911
3912        if (mShowErrorAfterAttach) {
3913            showError();
3914            mShowErrorAfterAttach = false;
3915        }
3916
3917        final ViewTreeObserver observer = getViewTreeObserver();
3918        if (observer != null) {
3919            // No need to create the controller.
3920            // The get method will add the listener on controller creation.
3921            if (mInsertionPointCursorController != null) {
3922                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
3923            }
3924            if (mSelectionModifierCursorController != null) {
3925                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
3926            }
3927        }
3928    }
3929
3930    @Override
3931    protected void onDetachedFromWindow() {
3932        super.onDetachedFromWindow();
3933
3934        final ViewTreeObserver observer = getViewTreeObserver();
3935        if (observer != null) {
3936            if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
3937                observer.removeOnPreDrawListener(this);
3938                mPreDrawState = PREDRAW_NOT_REGISTERED;
3939            }
3940            // No need to create the controller, as getXXController would.
3941            if (mInsertionPointCursorController != null) {
3942                observer.removeOnTouchModeChangeListener(mInsertionPointCursorController);
3943            }
3944            if (mSelectionModifierCursorController != null) {
3945                observer.removeOnTouchModeChangeListener(mSelectionModifierCursorController);
3946            }
3947        }
3948
3949        if (mError != null) {
3950            hideError();
3951        }
3952
3953        if (mBlink != null) {
3954            mBlink.cancel();
3955        }
3956
3957        if (mInsertionPointCursorController != null) {
3958            mInsertionPointCursorController.onDetached();
3959        }
3960
3961        if (mSelectionModifierCursorController != null) {
3962            mSelectionModifierCursorController.onDetached();
3963        }
3964
3965        hideControllers();
3966    }
3967
3968    @Override
3969    protected boolean isPaddingOffsetRequired() {
3970        return mShadowRadius != 0 || mDrawables != null;
3971    }
3972
3973    @Override
3974    protected int getLeftPaddingOffset() {
3975        return getCompoundPaddingLeft() - mPaddingLeft +
3976                (int) Math.min(0, mShadowDx - mShadowRadius);
3977    }
3978
3979    @Override
3980    protected int getTopPaddingOffset() {
3981        return (int) Math.min(0, mShadowDy - mShadowRadius);
3982    }
3983
3984    @Override
3985    protected int getBottomPaddingOffset() {
3986        return (int) Math.max(0, mShadowDy + mShadowRadius);
3987    }
3988
3989    @Override
3990    protected int getRightPaddingOffset() {
3991        return -(getCompoundPaddingRight() - mPaddingRight) +
3992                (int) Math.max(0, mShadowDx + mShadowRadius);
3993    }
3994
3995    @Override
3996    protected boolean verifyDrawable(Drawable who) {
3997        final boolean verified = super.verifyDrawable(who);
3998        if (!verified && mDrawables != null) {
3999            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4000                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom;
4001        }
4002        return verified;
4003    }
4004
4005    @Override
4006    public void jumpDrawablesToCurrentState() {
4007        super.jumpDrawablesToCurrentState();
4008        if (mDrawables != null) {
4009            if (mDrawables.mDrawableLeft != null) {
4010                mDrawables.mDrawableLeft.jumpToCurrentState();
4011            }
4012            if (mDrawables.mDrawableTop != null) {
4013                mDrawables.mDrawableTop.jumpToCurrentState();
4014            }
4015            if (mDrawables.mDrawableRight != null) {
4016                mDrawables.mDrawableRight.jumpToCurrentState();
4017            }
4018            if (mDrawables.mDrawableBottom != null) {
4019                mDrawables.mDrawableBottom.jumpToCurrentState();
4020            }
4021        }
4022    }
4023
4024    @Override
4025    public void invalidateDrawable(Drawable drawable) {
4026        if (verifyDrawable(drawable)) {
4027            final Rect dirty = drawable.getBounds();
4028            int scrollX = mScrollX;
4029            int scrollY = mScrollY;
4030
4031            // IMPORTANT: The coordinates below are based on the coordinates computed
4032            // for each compound drawable in onDraw(). Make sure to update each section
4033            // accordingly.
4034            final TextView.Drawables drawables = mDrawables;
4035            if (drawables != null) {
4036                if (drawable == drawables.mDrawableLeft) {
4037                    final int compoundPaddingTop = getCompoundPaddingTop();
4038                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4039                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4040
4041                    scrollX += mPaddingLeft;
4042                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4043                } else if (drawable == drawables.mDrawableRight) {
4044                    final int compoundPaddingTop = getCompoundPaddingTop();
4045                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4046                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4047
4048                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4049                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4050                } else if (drawable == drawables.mDrawableTop) {
4051                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4052                    final int compoundPaddingRight = getCompoundPaddingRight();
4053                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4054
4055                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4056                    scrollY += mPaddingTop;
4057                } else if (drawable == drawables.mDrawableBottom) {
4058                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4059                    final int compoundPaddingRight = getCompoundPaddingRight();
4060                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4061
4062                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4063                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4064                }
4065            }
4066
4067            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4068                    dirty.right + scrollX, dirty.bottom + scrollY);
4069        }
4070    }
4071
4072    @Override
4073    protected boolean onSetAlpha(int alpha) {
4074        // Alpha is supported if and only if the drawing can be done in one pass.
4075        // TODO text with spans with a background color currently do not respect this alpha.
4076        if (getBackground() == null) {
4077            mCurrentAlpha = alpha;
4078            final Drawables dr = mDrawables;
4079            if (dr != null) {
4080                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4081                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4082                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4083                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4084            }
4085            return true;
4086        }
4087
4088        mCurrentAlpha = 255;
4089        return false;
4090    }
4091
4092    /**
4093     * When a TextView is used to display a useful piece of information to the user (such as a
4094     * contact's address), it should be made selectable, so that the user can select and copy this
4095     * content.
4096     *
4097     * Use {@link #setTextIsSelectable(boolean)} or the
4098     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4099     * selectable (text is not selectable by default).
4100     *
4101     * Note that the content of an EditText is always selectable.
4102     *
4103     * @return True if the text displayed in this TextView can be selected by the user.
4104     *
4105     * @attr ref android.R.styleable#TextView_textIsSelectable
4106     */
4107    public boolean isTextSelectable() {
4108        return mTextIsSelectable;
4109    }
4110
4111    /**
4112     * Sets whether or not (default) the content of this view is selectable by the user.
4113     *
4114     * Note that this methods affect the {@link #setFocusable(boolean)},
4115     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4116     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4117     * customized.
4118     *
4119     * See {@link #isTextSelectable} for details.
4120     *
4121     * @param selectable Whether or not the content of this TextView should be selectable.
4122     */
4123    public void setTextIsSelectable(boolean selectable) {
4124        if (mTextIsSelectable == selectable) return;
4125
4126        mTextIsSelectable = selectable;
4127
4128        setFocusableInTouchMode(selectable);
4129        setFocusable(selectable);
4130        setClickable(selectable);
4131        setLongClickable(selectable);
4132
4133        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4134
4135        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4136        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4137
4138        // Called by setText above, but safer in case of future code changes
4139        prepareCursorControllers();
4140    }
4141
4142    @Override
4143    protected int[] onCreateDrawableState(int extraSpace) {
4144        final int[] drawableState;
4145
4146        if (mSingleLine) {
4147            drawableState = super.onCreateDrawableState(extraSpace);
4148        } else {
4149            drawableState = super.onCreateDrawableState(extraSpace + 1);
4150            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4151        }
4152
4153        if (mTextIsSelectable) {
4154            // Disable pressed state, which was introduced when TextView was made clickable.
4155            // Prevents text color change.
4156            // setClickable(false) would have a similar effect, but it also disables focus changes
4157            // and long press actions, which are both needed by text selection.
4158            final int length = drawableState.length;
4159            for (int i = 0; i < length; i++) {
4160                if (drawableState[i] == R.attr.state_pressed) {
4161                    final int[] nonPressedState = new int[length - 1];
4162                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4163                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4164                    return nonPressedState;
4165                }
4166            }
4167        }
4168
4169        return drawableState;
4170    }
4171
4172    @Override
4173    protected void onDraw(Canvas canvas) {
4174        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4175
4176        restartMarqueeIfNeeded();
4177
4178        // Draw the background for this view
4179        super.onDraw(canvas);
4180
4181        final int compoundPaddingLeft = getCompoundPaddingLeft();
4182        final int compoundPaddingTop = getCompoundPaddingTop();
4183        final int compoundPaddingRight = getCompoundPaddingRight();
4184        final int compoundPaddingBottom = getCompoundPaddingBottom();
4185        final int scrollX = mScrollX;
4186        final int scrollY = mScrollY;
4187        final int right = mRight;
4188        final int left = mLeft;
4189        final int bottom = mBottom;
4190        final int top = mTop;
4191
4192        final Drawables dr = mDrawables;
4193        if (dr != null) {
4194            /*
4195             * Compound, not extended, because the icon is not clipped
4196             * if the text height is smaller.
4197             */
4198
4199            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4200            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4201
4202            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4203            // Make sure to update invalidateDrawable() when changing this code.
4204            if (dr.mDrawableLeft != null) {
4205                canvas.save();
4206                canvas.translate(scrollX + mPaddingLeft,
4207                                 scrollY + compoundPaddingTop +
4208                                 (vspace - dr.mDrawableHeightLeft) / 2);
4209                dr.mDrawableLeft.draw(canvas);
4210                canvas.restore();
4211            }
4212
4213            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4214            // Make sure to update invalidateDrawable() when changing this code.
4215            if (dr.mDrawableRight != null) {
4216                canvas.save();
4217                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4218                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4219                dr.mDrawableRight.draw(canvas);
4220                canvas.restore();
4221            }
4222
4223            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4224            // Make sure to update invalidateDrawable() when changing this code.
4225            if (dr.mDrawableTop != null) {
4226                canvas.save();
4227                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4228                        scrollY + mPaddingTop);
4229                dr.mDrawableTop.draw(canvas);
4230                canvas.restore();
4231            }
4232
4233            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4234            // Make sure to update invalidateDrawable() when changing this code.
4235            if (dr.mDrawableBottom != null) {
4236                canvas.save();
4237                canvas.translate(scrollX + compoundPaddingLeft +
4238                        (hspace - dr.mDrawableWidthBottom) / 2,
4239                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4240                dr.mDrawableBottom.draw(canvas);
4241                canvas.restore();
4242            }
4243        }
4244
4245        if (mPreDrawState == PREDRAW_DONE) {
4246            final ViewTreeObserver observer = getViewTreeObserver();
4247            if (observer != null) {
4248                observer.removeOnPreDrawListener(this);
4249                mPreDrawState = PREDRAW_NOT_REGISTERED;
4250            }
4251        }
4252
4253        int color = mCurTextColor;
4254
4255        if (mLayout == null) {
4256            assumeLayout();
4257        }
4258
4259        Layout layout = mLayout;
4260        int cursorcolor = color;
4261
4262        if (mHint != null && mText.length() == 0) {
4263            if (mHintTextColor != null) {
4264                color = mCurHintTextColor;
4265            }
4266
4267            layout = mHintLayout;
4268        }
4269
4270        mTextPaint.setColor(color);
4271        if (mCurrentAlpha != 255) {
4272            // If set, the alpha will override the color's alpha. Multiply the alphas.
4273            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4274        }
4275        mTextPaint.drawableState = getDrawableState();
4276
4277        canvas.save();
4278        /*  Would be faster if we didn't have to do this. Can we chop the
4279            (displayable) text so that we don't need to do this ever?
4280        */
4281
4282        int extendedPaddingTop = getExtendedPaddingTop();
4283        int extendedPaddingBottom = getExtendedPaddingBottom();
4284
4285        float clipLeft = compoundPaddingLeft + scrollX;
4286        float clipTop = extendedPaddingTop + scrollY;
4287        float clipRight = right - left - compoundPaddingRight + scrollX;
4288        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4289
4290        if (mShadowRadius != 0) {
4291            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4292            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4293
4294            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4295            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4296        }
4297
4298        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4299
4300        int voffsetText = 0;
4301        int voffsetCursor = 0;
4302
4303        // translate in by our padding
4304        {
4305            /* shortcircuit calling getVerticaOffset() */
4306            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4307                voffsetText = getVerticalOffset(false);
4308                voffsetCursor = getVerticalOffset(true);
4309            }
4310            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4311        }
4312
4313        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4314            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4315                    (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4316                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4317                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4318            }
4319
4320            if (mMarquee != null && mMarquee.isRunning()) {
4321                canvas.translate(-mMarquee.mScroll, 0.0f);
4322            }
4323        }
4324
4325        Path highlight = null;
4326        int selStart = -1, selEnd = -1;
4327
4328        //  If there is no movement method, then there can be no selection.
4329        //  Check that first and attempt to skip everything having to do with
4330        //  the cursor.
4331        //  XXX This is not strictly true -- a program could set the
4332        //  selection manually if it really wanted to.
4333        if (mMovement != null && (isFocused() || isPressed())) {
4334            selStart = getSelectionStart();
4335            selEnd = getSelectionEnd();
4336
4337            if ((isCursorVisible() || mTextIsSelectable) && selStart >= 0 && isEnabled()) {
4338                if (mHighlightPath == null)
4339                    mHighlightPath = new Path();
4340
4341                if (selStart == selEnd) {
4342                    if (!mTextIsSelectable &&
4343                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4344                        if (mHighlightPathBogus) {
4345                            mHighlightPath.reset();
4346                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4347                            mHighlightPathBogus = false;
4348                        }
4349
4350                        // XXX should pass to skin instead of drawing directly
4351                        mHighlightPaint.setColor(cursorcolor);
4352                        if (mCurrentAlpha != 255) {
4353                            mHighlightPaint.setAlpha(
4354                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4355                        }
4356                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4357
4358                        highlight = mHighlightPath;
4359                    }
4360                } else {
4361                    if (mHighlightPathBogus) {
4362                        mHighlightPath.reset();
4363                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4364                        mHighlightPathBogus = false;
4365                    }
4366
4367                    // XXX should pass to skin instead of drawing directly
4368                    mHighlightPaint.setColor(mHighlightColor);
4369                    if (mCurrentAlpha != 255) {
4370                        mHighlightPaint.setAlpha(
4371                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4372                    }
4373                    mHighlightPaint.setStyle(Paint.Style.FILL);
4374
4375                    highlight = mHighlightPath;
4376                }
4377            }
4378        }
4379
4380        /*  Comment out until we decide what to do about animations
4381        boolean isLinearTextOn = false;
4382        if (currentTransformation != null) {
4383            isLinearTextOn = mTextPaint.isLinearTextOn();
4384            Matrix m = currentTransformation.getMatrix();
4385            if (!m.isIdentity()) {
4386                // mTextPaint.setLinearTextOn(true);
4387            }
4388        }
4389        */
4390
4391        final InputMethodState ims = mInputMethodState;
4392        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4393        if (ims != null && ims.mBatchEditNesting == 0) {
4394            InputMethodManager imm = InputMethodManager.peekInstance();
4395            if (imm != null) {
4396                if (imm.isActive(this)) {
4397                    boolean reported = false;
4398                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4399                        // We are in extract mode and the content has changed
4400                        // in some way... just report complete new text to the
4401                        // input method.
4402                        reported = reportExtractedText();
4403                    }
4404                    if (!reported && highlight != null) {
4405                        int candStart = -1;
4406                        int candEnd = -1;
4407                        if (mText instanceof Spannable) {
4408                            Spannable sp = (Spannable)mText;
4409                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4410                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4411                        }
4412                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4413                    }
4414                }
4415
4416                if (imm.isWatchingCursor(this) && highlight != null) {
4417                    highlight.computeBounds(ims.mTmpRectF, true);
4418                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4419
4420                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4421                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4422
4423                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4424
4425                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4426                            (int)(ims.mTmpRectF.top + 0.5),
4427                            (int)(ims.mTmpRectF.right + 0.5),
4428                            (int)(ims.mTmpRectF.bottom + 0.5));
4429
4430                    imm.updateCursor(this,
4431                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4432                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4433                }
4434            }
4435        }
4436
4437        if (mCorrectionHighlighter != null) {
4438            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4439        }
4440
4441        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4442
4443        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4444            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4445            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4446        }
4447
4448        /*  Comment out until we decide what to do about animations
4449        if (currentTransformation != null) {
4450            mTextPaint.setLinearTextOn(isLinearTextOn);
4451        }
4452        */
4453
4454        canvas.restore();
4455
4456        updateCursorControllerPositions();
4457    }
4458
4459    /**
4460     * Update the positions of the CursorControllers.  Needed by WebTextView,
4461     * which does not draw.
4462     * @hide
4463     */
4464    protected void updateCursorControllerPositions() {
4465        // No need to create the controllers if they were not already
4466        if (mInsertionPointCursorController != null &&
4467                mInsertionPointCursorController.isShowing()) {
4468            mInsertionPointCursorController.updatePosition();
4469        }
4470        if (mSelectionModifierCursorController != null &&
4471                mSelectionModifierCursorController.isShowing()) {
4472            mSelectionModifierCursorController.updatePosition();
4473        }
4474    }
4475
4476    @Override
4477    public void getFocusedRect(Rect r) {
4478        if (mLayout == null) {
4479            super.getFocusedRect(r);
4480            return;
4481        }
4482
4483        int sel = getSelectionEnd();
4484        if (sel < 0) {
4485            super.getFocusedRect(r);
4486            return;
4487        }
4488
4489        int line = mLayout.getLineForOffset(sel);
4490        r.top = mLayout.getLineTop(line);
4491        r.bottom = mLayout.getLineBottom(line);
4492
4493        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4494        r.right = r.left + 1;
4495
4496        // Adjust for padding and gravity.
4497        int paddingLeft = getCompoundPaddingLeft();
4498        int paddingTop = getExtendedPaddingTop();
4499        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4500            paddingTop += getVerticalOffset(false);
4501        }
4502        r.offset(paddingLeft, paddingTop);
4503    }
4504
4505    /**
4506     * Return the number of lines of text, or 0 if the internal Layout has not
4507     * been built.
4508     */
4509    public int getLineCount() {
4510        return mLayout != null ? mLayout.getLineCount() : 0;
4511    }
4512
4513    /**
4514     * Return the baseline for the specified line (0...getLineCount() - 1)
4515     * If bounds is not null, return the top, left, right, bottom extents
4516     * of the specified line in it. If the internal Layout has not been built,
4517     * return 0 and set bounds to (0, 0, 0, 0)
4518     * @param line which line to examine (0..getLineCount() - 1)
4519     * @param bounds Optional. If not null, it returns the extent of the line
4520     * @return the Y-coordinate of the baseline
4521     */
4522    public int getLineBounds(int line, Rect bounds) {
4523        if (mLayout == null) {
4524            if (bounds != null) {
4525                bounds.set(0, 0, 0, 0);
4526            }
4527            return 0;
4528        }
4529        else {
4530            int baseline = mLayout.getLineBounds(line, bounds);
4531
4532            int voffset = getExtendedPaddingTop();
4533            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4534                voffset += getVerticalOffset(true);
4535            }
4536            if (bounds != null) {
4537                bounds.offset(getCompoundPaddingLeft(), voffset);
4538            }
4539            return baseline + voffset;
4540        }
4541    }
4542
4543    @Override
4544    public int getBaseline() {
4545        if (mLayout == null) {
4546            return super.getBaseline();
4547        }
4548
4549        int voffset = 0;
4550        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4551            voffset = getVerticalOffset(true);
4552        }
4553
4554        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
4555    }
4556
4557    @Override
4558    public boolean onKeyDown(int keyCode, KeyEvent event) {
4559        int which = doKeyDown(keyCode, event, null);
4560        if (which == 0) {
4561            // Go through default dispatching.
4562            return super.onKeyDown(keyCode, event);
4563        }
4564
4565        return true;
4566    }
4567
4568    @Override
4569    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
4570        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
4571
4572        int which = doKeyDown(keyCode, down, event);
4573        if (which == 0) {
4574            // Go through default dispatching.
4575            return super.onKeyMultiple(keyCode, repeatCount, event);
4576        }
4577        if (which == -1) {
4578            // Consumed the whole thing.
4579            return true;
4580        }
4581
4582        repeatCount--;
4583
4584        // We are going to dispatch the remaining events to either the input
4585        // or movement method.  To do this, we will just send a repeated stream
4586        // of down and up events until we have done the complete repeatCount.
4587        // It would be nice if those interfaces had an onKeyMultiple() method,
4588        // but adding that is a more complicated change.
4589        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
4590        if (which == 1) {
4591            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4592            while (--repeatCount > 0) {
4593                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
4594                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
4595            }
4596            if (mError != null && !mErrorWasChanged) {
4597                setError(null, null);
4598            }
4599
4600        } else if (which == 2) {
4601            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4602            while (--repeatCount > 0) {
4603                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
4604                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
4605            }
4606        }
4607
4608        return true;
4609    }
4610
4611    /**
4612     * Returns true if pressing ENTER in this field advances focus instead
4613     * of inserting the character.  This is true mostly in single-line fields,
4614     * but also in mail addresses and subjects which will display on multiple
4615     * lines but where it doesn't make sense to insert newlines.
4616     */
4617    private boolean shouldAdvanceFocusOnEnter() {
4618        if (mInput == null) {
4619            return false;
4620        }
4621
4622        if (mSingleLine) {
4623            return true;
4624        }
4625
4626        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4627            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4628            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
4629                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
4630                return true;
4631            }
4632        }
4633
4634        return false;
4635    }
4636
4637    /**
4638     * Returns true if pressing TAB in this field advances focus instead
4639     * of inserting the character.  Insert tabs only in multi-line editors.
4640     */
4641    private boolean shouldAdvanceFocusOnTab() {
4642        if (mInput != null && !mSingleLine) {
4643            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
4644                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
4645                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
4646                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
4647                    return false;
4648                }
4649            }
4650        }
4651        return true;
4652    }
4653
4654    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
4655        if (!isEnabled()) {
4656            return 0;
4657        }
4658
4659        switch (keyCode) {
4660            case KeyEvent.KEYCODE_ENTER:
4661                mEnterKeyIsDown = true;
4662                if (event.hasNoModifiers()) {
4663                    // When mInputContentType is set, we know that we are
4664                    // running in a "modern" cupcake environment, so don't need
4665                    // to worry about the application trying to capture
4666                    // enter key events.
4667                    if (mInputContentType != null) {
4668                        // If there is an action listener, given them a
4669                        // chance to consume the event.
4670                        if (mInputContentType.onEditorActionListener != null &&
4671                                mInputContentType.onEditorActionListener.onEditorAction(
4672                                this, EditorInfo.IME_NULL, event)) {
4673                            mInputContentType.enterDown = true;
4674                            // We are consuming the enter key for them.
4675                            return -1;
4676                        }
4677                    }
4678
4679                    // If our editor should move focus when enter is pressed, or
4680                    // this is a generated event from an IME action button, then
4681                    // don't let it be inserted into the text.
4682                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4683                            || shouldAdvanceFocusOnEnter()) {
4684                        if (mOnClickListener != null) {
4685                            return 0;
4686                        }
4687                        return -1;
4688                    }
4689                }
4690                break;
4691
4692            case KeyEvent.KEYCODE_DPAD_CENTER:
4693                mDPadCenterIsDown = true;
4694                if (event.hasNoModifiers()) {
4695                    if (shouldAdvanceFocusOnEnter()) {
4696                        return 0;
4697                    }
4698                }
4699                break;
4700
4701            case KeyEvent.KEYCODE_TAB:
4702                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
4703                    if (shouldAdvanceFocusOnTab()) {
4704                        return 0;
4705                    }
4706                }
4707                break;
4708
4709                // Has to be done on key down (and not on key up) to correctly be intercepted.
4710            case KeyEvent.KEYCODE_BACK:
4711                if (mSelectionActionMode != null) {
4712                    stopSelectionActionMode();
4713                    return -1;
4714                }
4715                break;
4716        }
4717
4718        if (mInput != null) {
4719            /*
4720             * Keep track of what the error was before doing the input
4721             * so that if an input filter changed the error, we leave
4722             * that error showing.  Otherwise, we take down whatever
4723             * error was showing when the user types something.
4724             */
4725            mErrorWasChanged = false;
4726
4727            boolean doDown = true;
4728            if (otherEvent != null) {
4729                try {
4730                    beginBatchEdit();
4731                    boolean handled = mInput.onKeyOther(this, (Editable) mText,
4732                            otherEvent);
4733                    if (mError != null && !mErrorWasChanged) {
4734                        setError(null, null);
4735                    }
4736                    doDown = false;
4737                    if (handled) {
4738                        return -1;
4739                    }
4740                } catch (AbstractMethodError e) {
4741                    // onKeyOther was added after 1.0, so if it isn't
4742                    // implemented we need to try to dispatch as a regular down.
4743                } finally {
4744                    endBatchEdit();
4745                }
4746            }
4747
4748            if (doDown) {
4749                beginBatchEdit();
4750                if (mInput.onKeyDown(this, (Editable) mText, keyCode, event)) {
4751                    endBatchEdit();
4752                    if (mError != null && !mErrorWasChanged) {
4753                        setError(null, null);
4754                    }
4755                    return 1;
4756                }
4757                endBatchEdit();
4758            }
4759        }
4760
4761        // bug 650865: sometimes we get a key event before a layout.
4762        // don't try to move around if we don't know the layout.
4763
4764        if (mMovement != null && mLayout != null) {
4765            boolean doDown = true;
4766            if (otherEvent != null) {
4767                try {
4768                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
4769                            otherEvent);
4770                    doDown = false;
4771                    if (handled) {
4772                        return -1;
4773                    }
4774                } catch (AbstractMethodError e) {
4775                    // onKeyOther was added after 1.0, so if it isn't
4776                    // implemented we need to try to dispatch as a regular down.
4777                }
4778            }
4779            if (doDown) {
4780                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
4781                    return 2;
4782            }
4783        }
4784
4785        return 0;
4786    }
4787
4788    @Override
4789    public boolean onKeyUp(int keyCode, KeyEvent event) {
4790        if (!isEnabled()) {
4791            return super.onKeyUp(keyCode, event);
4792        }
4793
4794        switch (keyCode) {
4795            case KeyEvent.KEYCODE_DPAD_CENTER:
4796                mDPadCenterIsDown = false;
4797                if (event.hasNoModifiers()) {
4798                    /*
4799                     * If there is a click listener, just call through to
4800                     * super, which will invoke it.
4801                     *
4802                     * If there isn't a click listener, try to show the soft
4803                     * input method.  (It will also
4804                     * call performClick(), but that won't do anything in
4805                     * this case.)
4806                     */
4807                    if (mOnClickListener == null) {
4808                        if (mMovement != null && mText instanceof Editable
4809                                && mLayout != null && onCheckIsTextEditor()) {
4810                            InputMethodManager imm = (InputMethodManager)
4811                                    getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
4812                            imm.showSoftInput(this, 0);
4813                        }
4814                    }
4815                }
4816                return super.onKeyUp(keyCode, event);
4817
4818            case KeyEvent.KEYCODE_ENTER:
4819                mEnterKeyIsDown = false;
4820                if (event.hasNoModifiers()) {
4821                    if (mInputContentType != null
4822                            && mInputContentType.onEditorActionListener != null
4823                            && mInputContentType.enterDown) {
4824                        mInputContentType.enterDown = false;
4825                        if (mInputContentType.onEditorActionListener.onEditorAction(
4826                                this, EditorInfo.IME_NULL, event)) {
4827                            return true;
4828                        }
4829                    }
4830
4831                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
4832                            || shouldAdvanceFocusOnEnter()) {
4833                        /*
4834                         * If there is a click listener, just call through to
4835                         * super, which will invoke it.
4836                         *
4837                         * If there isn't a click listener, try to advance focus,
4838                         * but still call through to super, which will reset the
4839                         * pressed state and longpress state.  (It will also
4840                         * call performClick(), but that won't do anything in
4841                         * this case.)
4842                         */
4843                        if (mOnClickListener == null) {
4844                            View v = focusSearch(FOCUS_DOWN);
4845
4846                            if (v != null) {
4847                                if (!v.requestFocus(FOCUS_DOWN)) {
4848                                    throw new IllegalStateException(
4849                                            "focus search returned a view " +
4850                                            "that wasn't able to take focus!");
4851                                }
4852
4853                                /*
4854                                 * Return true because we handled the key; super
4855                                 * will return false because there was no click
4856                                 * listener.
4857                                 */
4858                                super.onKeyUp(keyCode, event);
4859                                return true;
4860                            } else if ((event.getFlags()
4861                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
4862                                // No target for next focus, but make sure the IME
4863                                // if this came from it.
4864                                InputMethodManager imm = InputMethodManager.peekInstance();
4865                                if (imm != null) {
4866                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4867                                }
4868                            }
4869                        }
4870                    }
4871                    return super.onKeyUp(keyCode, event);
4872                }
4873                break;
4874        }
4875
4876        if (mInput != null)
4877            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
4878                return true;
4879
4880        if (mMovement != null && mLayout != null)
4881            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
4882                return true;
4883
4884        return super.onKeyUp(keyCode, event);
4885    }
4886
4887    @Override public boolean onCheckIsTextEditor() {
4888        return mInputType != EditorInfo.TYPE_NULL;
4889    }
4890
4891    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
4892        if (onCheckIsTextEditor() && isEnabled()) {
4893            if (mInputMethodState == null) {
4894                mInputMethodState = new InputMethodState();
4895            }
4896            outAttrs.inputType = mInputType;
4897            if (mInputContentType != null) {
4898                outAttrs.imeOptions = mInputContentType.imeOptions;
4899                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
4900                outAttrs.actionLabel = mInputContentType.imeActionLabel;
4901                outAttrs.actionId = mInputContentType.imeActionId;
4902                outAttrs.extras = mInputContentType.extras;
4903            } else {
4904                outAttrs.imeOptions = EditorInfo.IME_NULL;
4905            }
4906            if (focusSearch(FOCUS_DOWN) != null) {
4907                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
4908            }
4909            if (focusSearch(FOCUS_UP) != null) {
4910                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
4911            }
4912            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
4913                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
4914                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
4915                    // An action has not been set, but the enter key will move to
4916                    // the next focus, so set the action to that.
4917                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
4918                } else {
4919                    // An action has not been set, and there is no focus to move
4920                    // to, so let's just supply a "done" action.
4921                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
4922                }
4923                if (!shouldAdvanceFocusOnEnter()) {
4924                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4925                }
4926            }
4927            if (isMultilineInputType(outAttrs.inputType)) {
4928                // Multi-line text editors should always show an enter key.
4929                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
4930            }
4931            outAttrs.hintText = mHint;
4932            if (mText instanceof Editable) {
4933                InputConnection ic = new EditableInputConnection(this);
4934                outAttrs.initialSelStart = getSelectionStart();
4935                outAttrs.initialSelEnd = getSelectionEnd();
4936                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
4937                return ic;
4938            }
4939        }
4940        return null;
4941    }
4942
4943    /**
4944     * If this TextView contains editable content, extract a portion of it
4945     * based on the information in <var>request</var> in to <var>outText</var>.
4946     * @return Returns true if the text was successfully extracted, else false.
4947     */
4948    public boolean extractText(ExtractedTextRequest request,
4949            ExtractedText outText) {
4950        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
4951                EXTRACT_UNKNOWN, outText);
4952    }
4953
4954    static final int EXTRACT_NOTHING = -2;
4955    static final int EXTRACT_UNKNOWN = -1;
4956
4957    boolean extractTextInternal(ExtractedTextRequest request,
4958            int partialStartOffset, int partialEndOffset, int delta,
4959            ExtractedText outText) {
4960        final CharSequence content = mText;
4961        if (content != null) {
4962            if (partialStartOffset != EXTRACT_NOTHING) {
4963                final int N = content.length();
4964                if (partialStartOffset < 0) {
4965                    outText.partialStartOffset = outText.partialEndOffset = -1;
4966                    partialStartOffset = 0;
4967                    partialEndOffset = N;
4968                } else {
4969                    // Now use the delta to determine the actual amount of text
4970                    // we need.
4971                    partialEndOffset += delta;
4972                    // Adjust offsets to ensure we contain full spans.
4973                    if (content instanceof Spanned) {
4974                        Spanned spanned = (Spanned)content;
4975                        Object[] spans = spanned.getSpans(partialStartOffset,
4976                                partialEndOffset, ParcelableSpan.class);
4977                        int i = spans.length;
4978                        while (i > 0) {
4979                            i--;
4980                            int j = spanned.getSpanStart(spans[i]);
4981                            if (j < partialStartOffset) partialStartOffset = j;
4982                            j = spanned.getSpanEnd(spans[i]);
4983                            if (j > partialEndOffset) partialEndOffset = j;
4984                        }
4985                    }
4986                    outText.partialStartOffset = partialStartOffset;
4987                    outText.partialEndOffset = partialEndOffset - delta;
4988
4989                    if (partialStartOffset > N) {
4990                        partialStartOffset = N;
4991                    } else if (partialStartOffset < 0) {
4992                        partialStartOffset = 0;
4993                    }
4994                    if (partialEndOffset > N) {
4995                        partialEndOffset = N;
4996                    } else if (partialEndOffset < 0) {
4997                        partialEndOffset = 0;
4998                    }
4999                }
5000                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5001                    outText.text = content.subSequence(partialStartOffset,
5002                            partialEndOffset);
5003                } else {
5004                    outText.text = TextUtils.substring(content, partialStartOffset,
5005                            partialEndOffset);
5006                }
5007            } else {
5008                outText.partialStartOffset = 0;
5009                outText.partialEndOffset = 0;
5010                outText.text = "";
5011            }
5012            outText.flags = 0;
5013            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5014                outText.flags |= ExtractedText.FLAG_SELECTING;
5015            }
5016            if (mSingleLine) {
5017                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5018            }
5019            outText.startOffset = 0;
5020            outText.selectionStart = getSelectionStart();
5021            outText.selectionEnd = getSelectionEnd();
5022            return true;
5023        }
5024        return false;
5025    }
5026
5027    boolean reportExtractedText() {
5028        final InputMethodState ims = mInputMethodState;
5029        if (ims != null) {
5030            final boolean contentChanged = ims.mContentChanged;
5031            if (contentChanged || ims.mSelectionModeChanged) {
5032                ims.mContentChanged = false;
5033                ims.mSelectionModeChanged = false;
5034                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5035                if (req != null) {
5036                    InputMethodManager imm = InputMethodManager.peekInstance();
5037                    if (imm != null) {
5038                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5039                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5040                                + " delta=" + ims.mChangedDelta);
5041                        if (ims.mChangedStart < 0 && !contentChanged) {
5042                            ims.mChangedStart = EXTRACT_NOTHING;
5043                        }
5044                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5045                                ims.mChangedDelta, ims.mTmpExtracted)) {
5046                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5047                                    + ims.mTmpExtracted.partialStartOffset
5048                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5049                                    + ": " + ims.mTmpExtracted.text);
5050                            imm.updateExtractedText(this, req.token,
5051                                    mInputMethodState.mTmpExtracted);
5052                            ims.mChangedStart = EXTRACT_UNKNOWN;
5053                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5054                            ims.mChangedDelta = 0;
5055                            ims.mContentChanged = false;
5056                            return true;
5057                        }
5058                    }
5059                }
5060            }
5061        }
5062        return false;
5063    }
5064
5065    /**
5066     * This is used to remove all style-impacting spans from text before new
5067     * extracted text is being replaced into it, so that we don't have any
5068     * lingering spans applied during the replace.
5069     */
5070    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5071        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5072        int i = spans.length;
5073        while (i > 0) {
5074            i--;
5075            spannable.removeSpan(spans[i]);
5076        }
5077    }
5078
5079    /**
5080     * Apply to this text view the given extracted text, as previously
5081     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5082     */
5083    public void setExtractedText(ExtractedText text) {
5084        Editable content = getEditableText();
5085        if (text.text != null) {
5086            if (content == null) {
5087                setText(text.text, TextView.BufferType.EDITABLE);
5088            } else if (text.partialStartOffset < 0) {
5089                removeParcelableSpans(content, 0, content.length());
5090                content.replace(0, content.length(), text.text);
5091            } else {
5092                final int N = content.length();
5093                int start = text.partialStartOffset;
5094                if (start > N) start = N;
5095                int end = text.partialEndOffset;
5096                if (end > N) end = N;
5097                removeParcelableSpans(content, start, end);
5098                content.replace(start, end, text.text);
5099            }
5100        }
5101
5102        // Now set the selection position...  make sure it is in range, to
5103        // avoid crashes.  If this is a partial update, it is possible that
5104        // the underlying text may have changed, causing us problems here.
5105        // Also we just don't want to trust clients to do the right thing.
5106        Spannable sp = (Spannable)getText();
5107        final int N = sp.length();
5108        int start = text.selectionStart;
5109        if (start < 0) start = 0;
5110        else if (start > N) start = N;
5111        int end = text.selectionEnd;
5112        if (end < 0) end = 0;
5113        else if (end > N) end = N;
5114        Selection.setSelection(sp, start, end);
5115
5116        // Finally, update the selection mode.
5117        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5118            MetaKeyKeyListener.startSelecting(this, sp);
5119        } else {
5120            MetaKeyKeyListener.stopSelecting(this, sp);
5121        }
5122    }
5123
5124    /**
5125     * @hide
5126     */
5127    public void setExtracting(ExtractedTextRequest req) {
5128        if (mInputMethodState != null) {
5129            mInputMethodState.mExtracting = req;
5130        }
5131        // This stops a possible text selection mode. Maybe not intended.
5132        hideControllers();
5133    }
5134
5135    /**
5136     * Called by the framework in response to a text completion from
5137     * the current input method, provided by it calling
5138     * {@link InputConnection#commitCompletion
5139     * InputConnection.commitCompletion()}.  The default implementation does
5140     * nothing; text views that are supporting auto-completion should override
5141     * this to do their desired behavior.
5142     *
5143     * @param text The auto complete text the user has selected.
5144     */
5145    public void onCommitCompletion(CompletionInfo text) {
5146    }
5147
5148    /**
5149     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5150     * a dictionnary) from the current input method, provided by it calling
5151     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5152     * implementation flashes the background of the corrected word to provide feedback to the user.
5153     *
5154     * @param info The auto correct info about the text that was corrected.
5155     */
5156    public void onCommitCorrection(CorrectionInfo info) {
5157        if (mCorrectionHighlighter == null) {
5158            mCorrectionHighlighter = new CorrectionHighlighter();
5159        } else {
5160            mCorrectionHighlighter.invalidate(false);
5161        }
5162
5163        mCorrectionHighlighter.highlight(info);
5164    }
5165
5166    private class CorrectionHighlighter {
5167        private final Path mPath = new Path();
5168        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5169        private int mStart, mEnd;
5170        private long mFadingStartTime;
5171        private final static int FADE_OUT_DURATION = 400;
5172
5173        public CorrectionHighlighter() {
5174            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5175            mPaint.setStyle(Paint.Style.FILL);
5176        }
5177
5178        public void highlight(CorrectionInfo info) {
5179            mStart = info.getOffset();
5180            mEnd = mStart + info.getNewText().length();
5181            mFadingStartTime = SystemClock.uptimeMillis();
5182
5183            if (mStart < 0 || mEnd < 0) {
5184                stopAnimation();
5185            }
5186        }
5187
5188        public void draw(Canvas canvas, int cursorOffsetVertical) {
5189            if (updatePath() && updatePaint()) {
5190                if (cursorOffsetVertical != 0) {
5191                    canvas.translate(0, cursorOffsetVertical);
5192                }
5193
5194                canvas.drawPath(mPath, mPaint);
5195
5196                if (cursorOffsetVertical != 0) {
5197                    canvas.translate(0, -cursorOffsetVertical);
5198                }
5199                invalidate(true);
5200            } else {
5201                stopAnimation();
5202                invalidate(false);
5203            }
5204        }
5205
5206        private boolean updatePaint() {
5207            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5208            if (duration > FADE_OUT_DURATION) return false;
5209
5210            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5211            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5212            final int color = (mHighlightColor & 0x00FFFFFF) +
5213                    ((int) (highlightColorAlpha * coef) << 24);
5214            mPaint.setColor(color);
5215            return true;
5216        }
5217
5218        private boolean updatePath() {
5219            final Layout layout = TextView.this.mLayout;
5220            if (layout == null) return false;
5221
5222            // Update in case text is edited while the animation is run
5223            final int length = mText.length();
5224            int start = Math.min(length, mStart);
5225            int end = Math.min(length, mEnd);
5226
5227            mPath.reset();
5228            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5229            return true;
5230        }
5231
5232        private void invalidate(boolean delayed) {
5233            if (TextView.this.mLayout == null) return;
5234
5235            synchronized (sTempRect) {
5236                mPath.computeBounds(sTempRect, false);
5237
5238                int left = getCompoundPaddingLeft();
5239                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5240
5241                if (delayed) {
5242                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5243                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5244                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5245                } else {
5246                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5247                            (int) sTempRect.right, (int) sTempRect.bottom);
5248                }
5249            }
5250        }
5251
5252        private void stopAnimation() {
5253            TextView.this.mCorrectionHighlighter = null;
5254        }
5255    }
5256
5257    public void beginBatchEdit() {
5258        mInBatchEditControllers = true;
5259        final InputMethodState ims = mInputMethodState;
5260        if (ims != null) {
5261            int nesting = ++ims.mBatchEditNesting;
5262            if (nesting == 1) {
5263                ims.mCursorChanged = false;
5264                ims.mChangedDelta = 0;
5265                if (ims.mContentChanged) {
5266                    // We already have a pending change from somewhere else,
5267                    // so turn this into a full update.
5268                    ims.mChangedStart = 0;
5269                    ims.mChangedEnd = mText.length();
5270                } else {
5271                    ims.mChangedStart = EXTRACT_UNKNOWN;
5272                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5273                    ims.mContentChanged = false;
5274                }
5275                onBeginBatchEdit();
5276            }
5277        }
5278    }
5279
5280    public void endBatchEdit() {
5281        mInBatchEditControllers = false;
5282        final InputMethodState ims = mInputMethodState;
5283        if (ims != null) {
5284            int nesting = --ims.mBatchEditNesting;
5285            if (nesting == 0) {
5286                finishBatchEdit(ims);
5287            }
5288        }
5289    }
5290
5291    void ensureEndedBatchEdit() {
5292        final InputMethodState ims = mInputMethodState;
5293        if (ims != null && ims.mBatchEditNesting != 0) {
5294            ims.mBatchEditNesting = 0;
5295            finishBatchEdit(ims);
5296        }
5297    }
5298
5299    void finishBatchEdit(final InputMethodState ims) {
5300        onEndBatchEdit();
5301
5302        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5303            updateAfterEdit();
5304            reportExtractedText();
5305        } else if (ims.mCursorChanged) {
5306            // Cheezy way to get us to report the current cursor location.
5307            invalidateCursor();
5308        }
5309    }
5310
5311    void updateAfterEdit() {
5312        invalidate();
5313        int curs = getSelectionStart();
5314
5315        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) ==
5316                             Gravity.BOTTOM) {
5317            registerForPreDraw();
5318        }
5319
5320        if (curs >= 0) {
5321            mHighlightPathBogus = true;
5322
5323            if (isFocused()) {
5324                mShowCursor = SystemClock.uptimeMillis();
5325                makeBlink();
5326            }
5327        }
5328
5329        checkForResize();
5330    }
5331
5332    /**
5333     * Called by the framework in response to a request to begin a batch
5334     * of edit operations through a call to link {@link #beginBatchEdit()}.
5335     */
5336    public void onBeginBatchEdit() {
5337    }
5338
5339    /**
5340     * Called by the framework in response to a request to end a batch
5341     * of edit operations through a call to link {@link #endBatchEdit}.
5342     */
5343    public void onEndBatchEdit() {
5344    }
5345
5346    /**
5347     * Called by the framework in response to a private command from the
5348     * current method, provided by it calling
5349     * {@link InputConnection#performPrivateCommand
5350     * InputConnection.performPrivateCommand()}.
5351     *
5352     * @param action The action name of the command.
5353     * @param data Any additional data for the command.  This may be null.
5354     * @return Return true if you handled the command, else false.
5355     */
5356    public boolean onPrivateIMECommand(String action, Bundle data) {
5357        return false;
5358    }
5359
5360    private void nullLayouts() {
5361        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5362            mSavedLayout = (BoringLayout) mLayout;
5363        }
5364        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5365            mSavedHintLayout = (BoringLayout) mHintLayout;
5366        }
5367
5368        mLayout = mHintLayout = null;
5369
5370        // Since it depends on the value of mLayout
5371        prepareCursorControllers();
5372    }
5373
5374    /**
5375     * Make a new Layout based on the already-measured size of the view,
5376     * on the assumption that it was measured correctly at some point.
5377     */
5378    private void assumeLayout() {
5379        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5380
5381        if (width < 1) {
5382            width = 0;
5383        }
5384
5385        int physicalWidth = width;
5386
5387        if (mHorizontallyScrolling) {
5388            width = VERY_WIDE;
5389        }
5390
5391        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5392                      physicalWidth, false);
5393    }
5394
5395    /**
5396     * The width passed in is now the desired layout width,
5397     * not the full view width with padding.
5398     * {@hide}
5399     */
5400    protected void makeNewLayout(int w, int hintWidth,
5401                                 BoringLayout.Metrics boring,
5402                                 BoringLayout.Metrics hintBoring,
5403                                 int ellipsisWidth, boolean bringIntoView) {
5404        stopMarquee();
5405
5406        mHighlightPathBogus = true;
5407
5408        if (w < 0) {
5409            w = 0;
5410        }
5411        if (hintWidth < 0) {
5412            hintWidth = 0;
5413        }
5414
5415        Layout.Alignment alignment;
5416        switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
5417            case Gravity.CENTER_HORIZONTAL:
5418                alignment = Layout.Alignment.ALIGN_CENTER;
5419                break;
5420
5421            case Gravity.RIGHT:
5422                // Note, Layout resolves ALIGN_OPPOSITE to left or
5423                // right based on the paragraph direction.
5424                alignment = Layout.Alignment.ALIGN_OPPOSITE;
5425                break;
5426
5427            default:
5428                alignment = Layout.Alignment.ALIGN_NORMAL;
5429        }
5430
5431        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5432
5433        if (mText instanceof Spannable) {
5434            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5435                    alignment, mSpacingMult,
5436                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5437                    ellipsisWidth);
5438        } else {
5439            if (boring == UNKNOWN_BORING) {
5440                boring = BoringLayout.isBoring(mTransformed, mTextPaint,
5441                                               mBoring);
5442                if (boring != null) {
5443                    mBoring = boring;
5444                }
5445            }
5446
5447            if (boring != null) {
5448                if (boring.width <= w &&
5449                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
5450                    if (mSavedLayout != null) {
5451                        mLayout = mSavedLayout.
5452                                replaceOrMake(mTransformed, mTextPaint,
5453                                w, alignment, mSpacingMult, mSpacingAdd,
5454                                boring, mIncludePad);
5455                    } else {
5456                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5457                                w, alignment, mSpacingMult, mSpacingAdd,
5458                                boring, mIncludePad);
5459                    }
5460
5461                    mSavedLayout = (BoringLayout) mLayout;
5462                } else if (shouldEllipsize && boring.width <= w) {
5463                    if (mSavedLayout != null) {
5464                        mLayout = mSavedLayout.
5465                                replaceOrMake(mTransformed, mTextPaint,
5466                                w, alignment, mSpacingMult, mSpacingAdd,
5467                                boring, mIncludePad, mEllipsize,
5468                                ellipsisWidth);
5469                    } else {
5470                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
5471                                w, alignment, mSpacingMult, mSpacingAdd,
5472                                boring, mIncludePad, mEllipsize,
5473                                ellipsisWidth);
5474                    }
5475                } else if (shouldEllipsize) {
5476                    mLayout = new StaticLayout(mTransformed,
5477                                0, mTransformed.length(),
5478                                mTextPaint, w, alignment, mSpacingMult,
5479                                mSpacingAdd, mIncludePad, mEllipsize,
5480                                ellipsisWidth);
5481                } else {
5482                    mLayout = new StaticLayout(mTransformed, mTextPaint,
5483                            w, alignment, mSpacingMult, mSpacingAdd,
5484                            mIncludePad);
5485                }
5486            } else if (shouldEllipsize) {
5487                mLayout = new StaticLayout(mTransformed,
5488                            0, mTransformed.length(),
5489                            mTextPaint, w, alignment, mSpacingMult,
5490                            mSpacingAdd, mIncludePad, mEllipsize,
5491                            ellipsisWidth);
5492            } else {
5493                mLayout = new StaticLayout(mTransformed, mTextPaint,
5494                        w, alignment, mSpacingMult, mSpacingAdd,
5495                        mIncludePad);
5496            }
5497        }
5498
5499        shouldEllipsize = mEllipsize != null;
5500        mHintLayout = null;
5501
5502        if (mHint != null) {
5503            if (shouldEllipsize) hintWidth = w;
5504
5505            if (hintBoring == UNKNOWN_BORING) {
5506                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
5507                                                   mHintBoring);
5508                if (hintBoring != null) {
5509                    mHintBoring = hintBoring;
5510                }
5511            }
5512
5513            if (hintBoring != null) {
5514                if (hintBoring.width <= hintWidth &&
5515                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
5516                    if (mSavedHintLayout != null) {
5517                        mHintLayout = mSavedHintLayout.
5518                                replaceOrMake(mHint, mTextPaint,
5519                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5520                                hintBoring, mIncludePad);
5521                    } else {
5522                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5523                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5524                                hintBoring, mIncludePad);
5525                    }
5526
5527                    mSavedHintLayout = (BoringLayout) mHintLayout;
5528                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
5529                    if (mSavedHintLayout != null) {
5530                        mHintLayout = mSavedHintLayout.
5531                                replaceOrMake(mHint, mTextPaint,
5532                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5533                                hintBoring, mIncludePad, mEllipsize,
5534                                ellipsisWidth);
5535                    } else {
5536                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
5537                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
5538                                hintBoring, mIncludePad, mEllipsize,
5539                                ellipsisWidth);
5540                    }
5541                } else if (shouldEllipsize) {
5542                    mHintLayout = new StaticLayout(mHint,
5543                                0, mHint.length(),
5544                                mTextPaint, hintWidth, alignment, mSpacingMult,
5545                                mSpacingAdd, mIncludePad, mEllipsize,
5546                                ellipsisWidth);
5547                } else {
5548                    mHintLayout = new StaticLayout(mHint, mTextPaint,
5549                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
5550                            mIncludePad);
5551                }
5552            } else if (shouldEllipsize) {
5553                mHintLayout = new StaticLayout(mHint,
5554                            0, mHint.length(),
5555                            mTextPaint, hintWidth, alignment, mSpacingMult,
5556                            mSpacingAdd, mIncludePad, mEllipsize,
5557                            ellipsisWidth);
5558            } else {
5559                mHintLayout = new StaticLayout(mHint, mTextPaint,
5560                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
5561                        mIncludePad);
5562            }
5563        }
5564
5565        if (bringIntoView) {
5566            registerForPreDraw();
5567        }
5568
5569        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5570            if (!compressText(ellipsisWidth)) {
5571                final int height = mLayoutParams.height;
5572                // If the size of the view does not depend on the size of the text, try to
5573                // start the marquee immediately
5574                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
5575                    startMarquee();
5576                } else {
5577                    // Defer the start of the marquee until we know our width (see setFrame())
5578                    mRestartMarquee = true;
5579                }
5580            }
5581        }
5582
5583        // CursorControllers need a non-null mLayout
5584        prepareCursorControllers();
5585    }
5586
5587    private boolean compressText(float width) {
5588        if (isHardwareAccelerated()) return false;
5589
5590        // Only compress the text if it hasn't been compressed by the previous pass
5591        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
5592                mTextPaint.getTextScaleX() == 1.0f) {
5593            final float textWidth = mLayout.getLineWidth(0);
5594            final float overflow = (textWidth + 1.0f - width) / width;
5595            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
5596                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
5597                post(new Runnable() {
5598                    public void run() {
5599                        requestLayout();
5600                    }
5601                });
5602                return true;
5603            }
5604        }
5605
5606        return false;
5607    }
5608
5609    private static int desired(Layout layout) {
5610        int n = layout.getLineCount();
5611        CharSequence text = layout.getText();
5612        float max = 0;
5613
5614        // if any line was wrapped, we can't use it.
5615        // but it's ok for the last line not to have a newline
5616
5617        for (int i = 0; i < n - 1; i++) {
5618            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
5619                return -1;
5620        }
5621
5622        for (int i = 0; i < n; i++) {
5623            max = Math.max(max, layout.getLineWidth(i));
5624        }
5625
5626        return (int) FloatMath.ceil(max);
5627    }
5628
5629    /**
5630     * Set whether the TextView includes extra top and bottom padding to make
5631     * room for accents that go above the normal ascent and descent.
5632     * The default is true.
5633     *
5634     * @attr ref android.R.styleable#TextView_includeFontPadding
5635     */
5636    public void setIncludeFontPadding(boolean includepad) {
5637        mIncludePad = includepad;
5638
5639        if (mLayout != null) {
5640            nullLayouts();
5641            requestLayout();
5642            invalidate();
5643        }
5644    }
5645
5646    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
5647
5648    @Override
5649    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
5650        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
5651        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
5652        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
5653        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
5654
5655        int width;
5656        int height;
5657
5658        BoringLayout.Metrics boring = UNKNOWN_BORING;
5659        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
5660
5661        int des = -1;
5662        boolean fromexisting = false;
5663
5664        if (widthMode == MeasureSpec.EXACTLY) {
5665            // Parent has told us how big to be. So be it.
5666            width = widthSize;
5667        } else {
5668            if (mLayout != null && mEllipsize == null) {
5669                des = desired(mLayout);
5670            }
5671
5672            if (des < 0) {
5673                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
5674                if (boring != null) {
5675                    mBoring = boring;
5676                }
5677            } else {
5678                fromexisting = true;
5679            }
5680
5681            if (boring == null || boring == UNKNOWN_BORING) {
5682                if (des < 0) {
5683                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
5684                }
5685
5686                width = des;
5687            } else {
5688                width = boring.width;
5689            }
5690
5691            final Drawables dr = mDrawables;
5692            if (dr != null) {
5693                width = Math.max(width, dr.mDrawableWidthTop);
5694                width = Math.max(width, dr.mDrawableWidthBottom);
5695            }
5696
5697            if (mHint != null) {
5698                int hintDes = -1;
5699                int hintWidth;
5700
5701                if (mHintLayout != null && mEllipsize == null) {
5702                    hintDes = desired(mHintLayout);
5703                }
5704
5705                if (hintDes < 0) {
5706                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
5707                    if (hintBoring != null) {
5708                        mHintBoring = hintBoring;
5709                    }
5710                }
5711
5712                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
5713                    if (hintDes < 0) {
5714                        hintDes = (int) FloatMath.ceil(
5715                                Layout.getDesiredWidth(mHint, mTextPaint));
5716                    }
5717
5718                    hintWidth = hintDes;
5719                } else {
5720                    hintWidth = hintBoring.width;
5721                }
5722
5723                if (hintWidth > width) {
5724                    width = hintWidth;
5725                }
5726            }
5727
5728            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
5729
5730            if (mMaxWidthMode == EMS) {
5731                width = Math.min(width, mMaxWidth * getLineHeight());
5732            } else {
5733                width = Math.min(width, mMaxWidth);
5734            }
5735
5736            if (mMinWidthMode == EMS) {
5737                width = Math.max(width, mMinWidth * getLineHeight());
5738            } else {
5739                width = Math.max(width, mMinWidth);
5740            }
5741
5742            // Check against our minimum width
5743            width = Math.max(width, getSuggestedMinimumWidth());
5744
5745            if (widthMode == MeasureSpec.AT_MOST) {
5746                width = Math.min(widthSize, width);
5747            }
5748        }
5749
5750        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
5751        int unpaddedWidth = want;
5752        int hintWant = want;
5753
5754        if (mHorizontallyScrolling)
5755            want = VERY_WIDE;
5756
5757        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
5758
5759        if (mLayout == null) {
5760            makeNewLayout(want, hintWant, boring, hintBoring,
5761                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5762        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
5763                   (mLayout.getEllipsizedWidth() !=
5764                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
5765            if (mHint == null && mEllipsize == null &&
5766                    want > mLayout.getWidth() &&
5767                    (mLayout instanceof BoringLayout ||
5768                            (fromexisting && des >= 0 && des <= want))) {
5769                mLayout.increaseWidthTo(want);
5770            } else {
5771                makeNewLayout(want, hintWant, boring, hintBoring,
5772                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
5773            }
5774        } else {
5775            // Width has not changed.
5776        }
5777
5778        if (heightMode == MeasureSpec.EXACTLY) {
5779            // Parent has told us how big to be. So be it.
5780            height = heightSize;
5781            mDesiredHeightAtMeasure = -1;
5782        } else {
5783            int desired = getDesiredHeight();
5784
5785            height = desired;
5786            mDesiredHeightAtMeasure = desired;
5787
5788            if (heightMode == MeasureSpec.AT_MOST) {
5789                height = Math.min(desired, heightSize);
5790            }
5791        }
5792
5793        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
5794        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
5795            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
5796        }
5797
5798        /*
5799         * We didn't let makeNewLayout() register to bring the cursor into view,
5800         * so do it here if there is any possibility that it is needed.
5801         */
5802        if (mMovement != null ||
5803            mLayout.getWidth() > unpaddedWidth ||
5804            mLayout.getHeight() > unpaddedHeight) {
5805            registerForPreDraw();
5806        } else {
5807            scrollTo(0, 0);
5808        }
5809
5810        setMeasuredDimension(width, height);
5811    }
5812
5813    private int getDesiredHeight() {
5814        return Math.max(
5815                getDesiredHeight(mLayout, true),
5816                getDesiredHeight(mHintLayout, mEllipsize != null));
5817    }
5818
5819    private int getDesiredHeight(Layout layout, boolean cap) {
5820        if (layout == null) {
5821            return 0;
5822        }
5823
5824        int linecount = layout.getLineCount();
5825        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
5826        int desired = layout.getLineTop(linecount);
5827
5828        final Drawables dr = mDrawables;
5829        if (dr != null) {
5830            desired = Math.max(desired, dr.mDrawableHeightLeft);
5831            desired = Math.max(desired, dr.mDrawableHeightRight);
5832        }
5833
5834        desired += pad;
5835
5836        if (mMaxMode == LINES) {
5837            /*
5838             * Don't cap the hint to a certain number of lines.
5839             * (Do cap it, though, if we have a maximum pixel height.)
5840             */
5841            if (cap) {
5842                if (linecount > mMaximum) {
5843                    desired = layout.getLineTop(mMaximum) +
5844                              layout.getBottomPadding();
5845
5846                    if (dr != null) {
5847                        desired = Math.max(desired, dr.mDrawableHeightLeft);
5848                        desired = Math.max(desired, dr.mDrawableHeightRight);
5849                    }
5850
5851                    desired += pad;
5852                    linecount = mMaximum;
5853                }
5854            }
5855        } else {
5856            desired = Math.min(desired, mMaximum);
5857        }
5858
5859        if (mMinMode == LINES) {
5860            if (linecount < mMinimum) {
5861                desired += getLineHeight() * (mMinimum - linecount);
5862            }
5863        } else {
5864            desired = Math.max(desired, mMinimum);
5865        }
5866
5867        // Check against our minimum height
5868        desired = Math.max(desired, getSuggestedMinimumHeight());
5869
5870        return desired;
5871    }
5872
5873    /**
5874     * Check whether a change to the existing text layout requires a
5875     * new view layout.
5876     */
5877    private void checkForResize() {
5878        boolean sizeChanged = false;
5879
5880        if (mLayout != null) {
5881            // Check if our width changed
5882            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
5883                sizeChanged = true;
5884                invalidate();
5885            }
5886
5887            // Check if our height changed
5888            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
5889                int desiredHeight = getDesiredHeight();
5890
5891                if (desiredHeight != this.getHeight()) {
5892                    sizeChanged = true;
5893                }
5894            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
5895                if (mDesiredHeightAtMeasure >= 0) {
5896                    int desiredHeight = getDesiredHeight();
5897
5898                    if (desiredHeight != mDesiredHeightAtMeasure) {
5899                        sizeChanged = true;
5900                    }
5901                }
5902            }
5903        }
5904
5905        if (sizeChanged) {
5906            requestLayout();
5907            // caller will have already invalidated
5908        }
5909    }
5910
5911    /**
5912     * Check whether entirely new text requires a new view layout
5913     * or merely a new text layout.
5914     */
5915    private void checkForRelayout() {
5916        // If we have a fixed width, we can just swap in a new text layout
5917        // if the text height stays the same or if the view height is fixed.
5918
5919        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
5920                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
5921                (mHint == null || mHintLayout != null) &&
5922                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
5923            // Static width, so try making a new text layout.
5924
5925            int oldht = mLayout.getHeight();
5926            int want = mLayout.getWidth();
5927            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
5928
5929            /*
5930             * No need to bring the text into view, since the size is not
5931             * changing (unless we do the requestLayout(), in which case it
5932             * will happen at measure).
5933             */
5934            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
5935                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
5936                          false);
5937
5938            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
5939                // In a fixed-height view, so use our new text layout.
5940                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
5941                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
5942                    invalidate();
5943                    return;
5944                }
5945
5946                // Dynamic height, but height has stayed the same,
5947                // so use our new text layout.
5948                if (mLayout.getHeight() == oldht &&
5949                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
5950                    invalidate();
5951                    return;
5952                }
5953            }
5954
5955            // We lose: the height has changed and we have a dynamic height.
5956            // Request a new view layout using our new text layout.
5957            requestLayout();
5958            invalidate();
5959        } else {
5960            // Dynamic width, so we have no choice but to request a new
5961            // view layout with a new text layout.
5962
5963            nullLayouts();
5964            requestLayout();
5965            invalidate();
5966        }
5967    }
5968
5969    /**
5970     * Returns true if anything changed.
5971     */
5972    private boolean bringTextIntoView() {
5973        int line = 0;
5974        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5975            line = mLayout.getLineCount() - 1;
5976        }
5977
5978        Layout.Alignment a = mLayout.getParagraphAlignment(line);
5979        int dir = mLayout.getParagraphDirection(line);
5980        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5981        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
5982        int ht = mLayout.getHeight();
5983
5984        int scrollx, scrolly;
5985
5986        if (a == Layout.Alignment.ALIGN_CENTER) {
5987            /*
5988             * Keep centered if possible, or, if it is too wide to fit,
5989             * keep leading edge in view.
5990             */
5991
5992            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
5993            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
5994
5995            if (right - left < hspace) {
5996                scrollx = (right + left) / 2 - hspace / 2;
5997            } else {
5998                if (dir < 0) {
5999                    scrollx = right - hspace;
6000                } else {
6001                    scrollx = left;
6002                }
6003            }
6004        } else if (a == Layout.Alignment.ALIGN_NORMAL) {
6005            /*
6006             * Keep leading edge in view.
6007             */
6008
6009            if (dir < 0) {
6010                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6011                scrollx = right - hspace;
6012            } else {
6013                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6014            }
6015        } else /* a == Layout.Alignment.ALIGN_OPPOSITE */ {
6016            /*
6017             * Keep trailing edge in view.
6018             */
6019
6020            if (dir < 0) {
6021                scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6022            } else {
6023                int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6024                scrollx = right - hspace;
6025            }
6026        }
6027
6028        if (ht < vspace) {
6029            scrolly = 0;
6030        } else {
6031            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6032                scrolly = ht - vspace;
6033            } else {
6034                scrolly = 0;
6035            }
6036        }
6037
6038        if (scrollx != mScrollX || scrolly != mScrollY) {
6039            scrollTo(scrollx, scrolly);
6040            return true;
6041        } else {
6042            return false;
6043        }
6044    }
6045
6046    /**
6047     * Move the point, specified by the offset, into the view if it is needed.
6048     * This has to be called after layout. Returns true if anything changed.
6049     */
6050    public boolean bringPointIntoView(int offset) {
6051        boolean changed = false;
6052
6053        int line = mLayout.getLineForOffset(offset);
6054
6055        // FIXME: Is it okay to truncate this, or should we round?
6056        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6057        final int top = mLayout.getLineTop(line);
6058        final int bottom = mLayout.getLineTop(line + 1);
6059
6060        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6061        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6062        int ht = mLayout.getHeight();
6063
6064        int grav;
6065
6066        switch (mLayout.getParagraphAlignment(line)) {
6067            case ALIGN_NORMAL:
6068                grav = 1;
6069                break;
6070
6071            case ALIGN_OPPOSITE:
6072                grav = -1;
6073                break;
6074
6075            default:
6076                grav = 0;
6077        }
6078
6079        grav *= mLayout.getParagraphDirection(line);
6080
6081        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6082        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6083
6084        int hslack = (bottom - top) / 2;
6085        int vslack = hslack;
6086
6087        if (vslack > vspace / 4)
6088            vslack = vspace / 4;
6089        if (hslack > hspace / 4)
6090            hslack = hspace / 4;
6091
6092        int hs = mScrollX;
6093        int vs = mScrollY;
6094
6095        if (top - vs < vslack)
6096            vs = top - vslack;
6097        if (bottom - vs > vspace - vslack)
6098            vs = bottom - (vspace - vslack);
6099        if (ht - vs < vspace)
6100            vs = ht - vspace;
6101        if (0 - vs > 0)
6102            vs = 0;
6103
6104        if (grav != 0) {
6105            if (x - hs < hslack) {
6106                hs = x - hslack;
6107            }
6108            if (x - hs > hspace - hslack) {
6109                hs = x - (hspace - hslack);
6110            }
6111        }
6112
6113        if (grav < 0) {
6114            if (left - hs > 0)
6115                hs = left;
6116            if (right - hs < hspace)
6117                hs = right - hspace;
6118        } else if (grav > 0) {
6119            if (right - hs < hspace)
6120                hs = right - hspace;
6121            if (left - hs > 0)
6122                hs = left;
6123        } else /* grav == 0 */ {
6124            if (right - left <= hspace) {
6125                /*
6126                 * If the entire text fits, center it exactly.
6127                 */
6128                hs = left - (hspace - (right - left)) / 2;
6129            } else if (x > right - hslack) {
6130                /*
6131                 * If we are near the right edge, keep the right edge
6132                 * at the edge of the view.
6133                 */
6134                hs = right - hspace;
6135            } else if (x < left + hslack) {
6136                /*
6137                 * If we are near the left edge, keep the left edge
6138                 * at the edge of the view.
6139                 */
6140                hs = left;
6141            } else if (left > hs) {
6142                /*
6143                 * Is there whitespace visible at the left?  Fix it if so.
6144                 */
6145                hs = left;
6146            } else if (right < hs + hspace) {
6147                /*
6148                 * Is there whitespace visible at the right?  Fix it if so.
6149                 */
6150                hs = right - hspace;
6151            } else {
6152                /*
6153                 * Otherwise, float as needed.
6154                 */
6155                if (x - hs < hslack) {
6156                    hs = x - hslack;
6157                }
6158                if (x - hs > hspace - hslack) {
6159                    hs = x - (hspace - hslack);
6160                }
6161            }
6162        }
6163
6164        if (hs != mScrollX || vs != mScrollY) {
6165            if (mScroller == null) {
6166                scrollTo(hs, vs);
6167            } else {
6168                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6169                int dx = hs - mScrollX;
6170                int dy = vs - mScrollY;
6171
6172                if (duration > ANIMATED_SCROLL_GAP) {
6173                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6174                    awakenScrollBars(mScroller.getDuration());
6175                    invalidate();
6176                } else {
6177                    if (!mScroller.isFinished()) {
6178                        mScroller.abortAnimation();
6179                    }
6180
6181                    scrollBy(dx, dy);
6182                }
6183
6184                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6185            }
6186
6187            changed = true;
6188        }
6189
6190        if (isFocused()) {
6191            // This offsets because getInterestingRect() is in terms of
6192            // viewport coordinates, but requestRectangleOnScreen()
6193            // is in terms of content coordinates.
6194
6195            Rect r = new Rect(x, top, x + 1, bottom);
6196            getInterestingRect(r, line);
6197            r.offset(mScrollX, mScrollY);
6198
6199            if (requestRectangleOnScreen(r)) {
6200                changed = true;
6201            }
6202        }
6203
6204        return changed;
6205    }
6206
6207    /**
6208     * Move the cursor, if needed, so that it is at an offset that is visible
6209     * to the user.  This will not move the cursor if it represents more than
6210     * one character (a selection range).  This will only work if the
6211     * TextView contains spannable text; otherwise it will do nothing.
6212     *
6213     * @return True if the cursor was actually moved, false otherwise.
6214     */
6215    public boolean moveCursorToVisibleOffset() {
6216        if (!(mText instanceof Spannable)) {
6217            return false;
6218        }
6219        int start = getSelectionStart();
6220        int end = getSelectionEnd();
6221        if (start != end) {
6222            return false;
6223        }
6224
6225        // First: make sure the line is visible on screen:
6226
6227        int line = mLayout.getLineForOffset(start);
6228
6229        final int top = mLayout.getLineTop(line);
6230        final int bottom = mLayout.getLineTop(line + 1);
6231        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6232        int vslack = (bottom - top) / 2;
6233        if (vslack > vspace / 4)
6234            vslack = vspace / 4;
6235        final int vs = mScrollY;
6236
6237        if (top < (vs+vslack)) {
6238            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6239        } else if (bottom > (vspace+vs-vslack)) {
6240            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6241        }
6242
6243        // Next: make sure the character is visible on screen:
6244
6245        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6246        final int hs = mScrollX;
6247        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6248        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6249
6250        // line might contain bidirectional text
6251        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6252        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6253
6254        int newStart = start;
6255        if (newStart < lowChar) {
6256            newStart = lowChar;
6257        } else if (newStart > highChar) {
6258            newStart = highChar;
6259        }
6260
6261        if (newStart != start) {
6262            Selection.setSelection((Spannable)mText, newStart);
6263            return true;
6264        }
6265
6266        return false;
6267    }
6268
6269    @Override
6270    public void computeScroll() {
6271        if (mScroller != null) {
6272            if (mScroller.computeScrollOffset()) {
6273                mScrollX = mScroller.getCurrX();
6274                mScrollY = mScroller.getCurrY();
6275                invalidateParentIfAccelerated();
6276                postInvalidate();  // So we draw again
6277            }
6278        }
6279    }
6280
6281    private void getInterestingRect(Rect r, int line) {
6282        convertFromViewportToContentCoordinates(r);
6283
6284        // Rectangle can can be expanded on first and last line to take
6285        // padding into account.
6286        // TODO Take left/right padding into account too?
6287        if (line == 0) r.top -= getExtendedPaddingTop();
6288        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6289    }
6290
6291    private void convertFromViewportToContentCoordinates(Rect r) {
6292        final int horizontalOffset = viewportToContentHorizontalOffset();
6293        r.left += horizontalOffset;
6294        r.right += horizontalOffset;
6295
6296        final int verticalOffset = viewportToContentVerticalOffset();
6297        r.top += verticalOffset;
6298        r.bottom += verticalOffset;
6299    }
6300
6301    private int viewportToContentHorizontalOffset() {
6302        return getCompoundPaddingLeft() - mScrollX;
6303    }
6304
6305    private int viewportToContentVerticalOffset() {
6306        int offset = getExtendedPaddingTop() - mScrollY;
6307        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6308            offset += getVerticalOffset(false);
6309        }
6310        return offset;
6311    }
6312
6313    @Override
6314    public void debug(int depth) {
6315        super.debug(depth);
6316
6317        String output = debugIndent(depth);
6318        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6319                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6320                + "} ";
6321
6322        if (mText != null) {
6323
6324            output += "mText=\"" + mText + "\" ";
6325            if (mLayout != null) {
6326                output += "mLayout width=" + mLayout.getWidth()
6327                        + " height=" + mLayout.getHeight();
6328            }
6329        } else {
6330            output += "mText=NULL";
6331        }
6332        Log.d(VIEW_LOG_TAG, output);
6333    }
6334
6335    /**
6336     * Convenience for {@link Selection#getSelectionStart}.
6337     */
6338    @ViewDebug.ExportedProperty(category = "text")
6339    public int getSelectionStart() {
6340        return Selection.getSelectionStart(getText());
6341    }
6342
6343    /**
6344     * Convenience for {@link Selection#getSelectionEnd}.
6345     */
6346    @ViewDebug.ExportedProperty(category = "text")
6347    public int getSelectionEnd() {
6348        return Selection.getSelectionEnd(getText());
6349    }
6350
6351    /**
6352     * Return true iff there is a selection inside this text view.
6353     */
6354    public boolean hasSelection() {
6355        final int selectionStart = getSelectionStart();
6356        final int selectionEnd = getSelectionEnd();
6357
6358        return selectionStart >= 0 && selectionStart != selectionEnd;
6359    }
6360
6361    /**
6362     * Sets the properties of this field (lines, horizontally scrolling,
6363     * transformation method) to be for a single-line input.
6364     *
6365     * @attr ref android.R.styleable#TextView_singleLine
6366     */
6367    public void setSingleLine() {
6368        setSingleLine(true);
6369    }
6370
6371    /**
6372     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6373     * transformation method) to be for a single-line input; if false, restores these to the default
6374     * conditions.
6375     *
6376     * Note that the default conditions are not necessarily those that were in effect prior this
6377     * method, and you may want to reset these properties to your custom values.
6378     *
6379     * @attr ref android.R.styleable#TextView_singleLine
6380     */
6381    @android.view.RemotableViewMethod
6382    public void setSingleLine(boolean singleLine) {
6383        // Could be used, but may break backward compatibility.
6384        // if (mSingleLine == singleLine) return;
6385        setInputTypeSingleLine(singleLine);
6386        applySingleLine(singleLine, true, true);
6387    }
6388
6389    /**
6390     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6391     * @param singleLine
6392     */
6393    private void setInputTypeSingleLine(boolean singleLine) {
6394        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6395            if (singleLine) {
6396                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6397            } else {
6398                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6399            }
6400        }
6401    }
6402
6403    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6404            boolean changeMaxLines) {
6405        mSingleLine = singleLine;
6406        if (singleLine) {
6407            setLines(1);
6408            setHorizontallyScrolling(true);
6409            if (applyTransformation) {
6410                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6411            }
6412            // TODO setState
6413        } else {
6414            if (changeMaxLines) {
6415                setMaxLines(Integer.MAX_VALUE);
6416            }
6417            setHorizontallyScrolling(false);
6418            if (applyTransformation) {
6419                setTransformationMethod(null);
6420            }
6421            // TODO setState
6422        }
6423    }
6424
6425    /**
6426     * Causes words in the text that are longer than the view is wide
6427     * to be ellipsized instead of broken in the middle.  You may also
6428     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
6429     * to constrain the text to a single line.  Use <code>null</code>
6430     * to turn off ellipsizing.
6431     *
6432     * @attr ref android.R.styleable#TextView_ellipsize
6433     */
6434    public void setEllipsize(TextUtils.TruncateAt where) {
6435        mEllipsize = where;
6436
6437        if (mLayout != null) {
6438            nullLayouts();
6439            requestLayout();
6440            invalidate();
6441        }
6442    }
6443
6444    /**
6445     * Sets how many times to repeat the marquee animation. Only applied if the
6446     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
6447     *
6448     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
6449     */
6450    public void setMarqueeRepeatLimit(int marqueeLimit) {
6451        mMarqueeRepeatLimit = marqueeLimit;
6452    }
6453
6454    /**
6455     * Returns where, if anywhere, words that are longer than the view
6456     * is wide should be ellipsized.
6457     */
6458    @ViewDebug.ExportedProperty
6459    public TextUtils.TruncateAt getEllipsize() {
6460        return mEllipsize;
6461    }
6462
6463    /**
6464     * Set the TextView so that when it takes focus, all the text is
6465     * selected.
6466     *
6467     * @attr ref android.R.styleable#TextView_selectAllOnFocus
6468     */
6469    @android.view.RemotableViewMethod
6470    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
6471        mSelectAllOnFocus = selectAllOnFocus;
6472
6473        if (selectAllOnFocus && !(mText instanceof Spannable)) {
6474            setText(mText, BufferType.SPANNABLE);
6475        }
6476    }
6477
6478    /**
6479     * Set whether the cursor is visible.  The default is true.
6480     *
6481     * @attr ref android.R.styleable#TextView_cursorVisible
6482     */
6483    @android.view.RemotableViewMethod
6484    public void setCursorVisible(boolean visible) {
6485        mCursorVisible = visible;
6486        invalidate();
6487
6488        makeBlink();
6489
6490        // InsertionPointCursorController depends on mCursorVisible
6491        prepareCursorControllers();
6492    }
6493
6494    private boolean isCursorVisible() {
6495        return mCursorVisible && isTextEditable();
6496    }
6497
6498    private boolean canMarquee() {
6499        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
6500        return width > 0 && mLayout.getLineWidth(0) > width;
6501    }
6502
6503    private void startMarquee() {
6504        // Do not ellipsize EditText
6505        if (mInput != null) return;
6506
6507        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6508            return;
6509        }
6510
6511        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
6512                getLineCount() == 1 && canMarquee()) {
6513
6514            if (mMarquee == null) mMarquee = new Marquee(this);
6515            mMarquee.start(mMarqueeRepeatLimit);
6516        }
6517    }
6518
6519    private void stopMarquee() {
6520        if (mMarquee != null && !mMarquee.isStopped()) {
6521            mMarquee.stop();
6522        }
6523    }
6524
6525    private void startStopMarquee(boolean start) {
6526        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6527            if (start) {
6528                startMarquee();
6529            } else {
6530                stopMarquee();
6531            }
6532        }
6533    }
6534
6535    private static final class Marquee extends Handler {
6536        // TODO: Add an option to configure this
6537        private static final float MARQUEE_DELTA_MAX = 0.07f;
6538        private static final int MARQUEE_DELAY = 1200;
6539        private static final int MARQUEE_RESTART_DELAY = 1200;
6540        private static final int MARQUEE_RESOLUTION = 1000 / 30;
6541        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
6542
6543        private static final byte MARQUEE_STOPPED = 0x0;
6544        private static final byte MARQUEE_STARTING = 0x1;
6545        private static final byte MARQUEE_RUNNING = 0x2;
6546
6547        private static final int MESSAGE_START = 0x1;
6548        private static final int MESSAGE_TICK = 0x2;
6549        private static final int MESSAGE_RESTART = 0x3;
6550
6551        private final WeakReference<TextView> mView;
6552
6553        private byte mStatus = MARQUEE_STOPPED;
6554        private final float mScrollUnit;
6555        private float mMaxScroll;
6556        float mMaxFadeScroll;
6557        private float mGhostStart;
6558        private float mGhostOffset;
6559        private float mFadeStop;
6560        private int mRepeatLimit;
6561
6562        float mScroll;
6563
6564        Marquee(TextView v) {
6565            final float density = v.getContext().getResources().getDisplayMetrics().density;
6566            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
6567            mView = new WeakReference<TextView>(v);
6568        }
6569
6570        @Override
6571        public void handleMessage(Message msg) {
6572            switch (msg.what) {
6573                case MESSAGE_START:
6574                    mStatus = MARQUEE_RUNNING;
6575                    tick();
6576                    break;
6577                case MESSAGE_TICK:
6578                    tick();
6579                    break;
6580                case MESSAGE_RESTART:
6581                    if (mStatus == MARQUEE_RUNNING) {
6582                        if (mRepeatLimit >= 0) {
6583                            mRepeatLimit--;
6584                        }
6585                        start(mRepeatLimit);
6586                    }
6587                    break;
6588            }
6589        }
6590
6591        void tick() {
6592            if (mStatus != MARQUEE_RUNNING) {
6593                return;
6594            }
6595
6596            removeMessages(MESSAGE_TICK);
6597
6598            final TextView textView = mView.get();
6599            if (textView != null && (textView.isFocused() || textView.isSelected())) {
6600                mScroll += mScrollUnit;
6601                if (mScroll > mMaxScroll) {
6602                    mScroll = mMaxScroll;
6603                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
6604                } else {
6605                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
6606                }
6607                textView.invalidate();
6608            }
6609        }
6610
6611        void stop() {
6612            mStatus = MARQUEE_STOPPED;
6613            removeMessages(MESSAGE_START);
6614            removeMessages(MESSAGE_RESTART);
6615            removeMessages(MESSAGE_TICK);
6616            resetScroll();
6617        }
6618
6619        private void resetScroll() {
6620            mScroll = 0.0f;
6621            final TextView textView = mView.get();
6622            if (textView != null) textView.invalidate();
6623        }
6624
6625        void start(int repeatLimit) {
6626            if (repeatLimit == 0) {
6627                stop();
6628                return;
6629            }
6630            mRepeatLimit = repeatLimit;
6631            final TextView textView = mView.get();
6632            if (textView != null && textView.mLayout != null) {
6633                mStatus = MARQUEE_STARTING;
6634                mScroll = 0.0f;
6635                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
6636                        textView.getCompoundPaddingRight();
6637                final float lineWidth = textView.mLayout.getLineWidth(0);
6638                final float gap = textWidth / 3.0f;
6639                mGhostStart = lineWidth - textWidth + gap;
6640                mMaxScroll = mGhostStart + textWidth;
6641                mGhostOffset = lineWidth + gap;
6642                mFadeStop = lineWidth + textWidth / 6.0f;
6643                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
6644
6645                textView.invalidate();
6646                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
6647            }
6648        }
6649
6650        float getGhostOffset() {
6651            return mGhostOffset;
6652        }
6653
6654        boolean shouldDrawLeftFade() {
6655            return mScroll <= mFadeStop;
6656        }
6657
6658        boolean shouldDrawGhost() {
6659            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
6660        }
6661
6662        boolean isRunning() {
6663            return mStatus == MARQUEE_RUNNING;
6664        }
6665
6666        boolean isStopped() {
6667            return mStatus == MARQUEE_STOPPED;
6668        }
6669    }
6670
6671    /**
6672     * This method is called when the text is changed, in case any
6673     * subclasses would like to know.
6674     *
6675     * @param text The text the TextView is displaying.
6676     * @param start The offset of the start of the range of the text
6677     *              that was modified.
6678     * @param before The offset of the former end of the range of the
6679     *               text that was modified.  If text was simply inserted,
6680     *               this will be the same as <code>start</code>.
6681     *               If text was replaced with new text or deleted, the
6682     *               length of the old text was <code>before-start</code>.
6683     * @param after The offset of the end of the range of the text
6684     *              that was modified.  If text was simply deleted,
6685     *              this will be the same as <code>start</code>.
6686     *              If text was replaced with new text or inserted,
6687     *              the length of the new text is <code>after-start</code>.
6688     */
6689    protected void onTextChanged(CharSequence text,
6690                                 int start, int before, int after) {
6691    }
6692
6693    /**
6694     * This method is called when the selection has changed, in case any
6695     * subclasses would like to know.
6696     *
6697     * @param selStart The new selection start location.
6698     * @param selEnd The new selection end location.
6699     */
6700    protected void onSelectionChanged(int selStart, int selEnd) {
6701    }
6702
6703    /**
6704     * Adds a TextWatcher to the list of those whose methods are called
6705     * whenever this TextView's text changes.
6706     * <p>
6707     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
6708     * not called after {@link #setText} calls.  Now, doing {@link #setText}
6709     * if there are any text changed listeners forces the buffer type to
6710     * Editable if it would not otherwise be and does call this method.
6711     */
6712    public void addTextChangedListener(TextWatcher watcher) {
6713        if (mListeners == null) {
6714            mListeners = new ArrayList<TextWatcher>();
6715        }
6716
6717        mListeners.add(watcher);
6718    }
6719
6720    /**
6721     * Removes the specified TextWatcher from the list of those whose
6722     * methods are called
6723     * whenever this TextView's text changes.
6724     */
6725    public void removeTextChangedListener(TextWatcher watcher) {
6726        if (mListeners != null) {
6727            int i = mListeners.indexOf(watcher);
6728
6729            if (i >= 0) {
6730                mListeners.remove(i);
6731            }
6732        }
6733    }
6734
6735    private void sendBeforeTextChanged(CharSequence text, int start, int before,
6736                                   int after) {
6737        if (mListeners != null) {
6738            final ArrayList<TextWatcher> list = mListeners;
6739            final int count = list.size();
6740            for (int i = 0; i < count; i++) {
6741                list.get(i).beforeTextChanged(text, start, before, after);
6742            }
6743        }
6744    }
6745
6746    /**
6747     * Not private so it can be called from an inner class without going
6748     * through a thunk.
6749     */
6750    void sendOnTextChanged(CharSequence text, int start, int before,
6751                                   int after) {
6752        if (mListeners != null) {
6753            final ArrayList<TextWatcher> list = mListeners;
6754            final int count = list.size();
6755            for (int i = 0; i < count; i++) {
6756                list.get(i).onTextChanged(text, start, before, after);
6757            }
6758        }
6759    }
6760
6761    /**
6762     * Not private so it can be called from an inner class without going
6763     * through a thunk.
6764     */
6765    void sendAfterTextChanged(Editable text) {
6766        if (mListeners != null) {
6767            final ArrayList<TextWatcher> list = mListeners;
6768            final int count = list.size();
6769            for (int i = 0; i < count; i++) {
6770                list.get(i).afterTextChanged(text);
6771            }
6772        }
6773    }
6774
6775    /**
6776     * Not private so it can be called from an inner class without going
6777     * through a thunk.
6778     */
6779    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
6780        final InputMethodState ims = mInputMethodState;
6781        if (ims == null || ims.mBatchEditNesting == 0) {
6782            updateAfterEdit();
6783        }
6784        if (ims != null) {
6785            ims.mContentChanged = true;
6786            if (ims.mChangedStart < 0) {
6787                ims.mChangedStart = start;
6788                ims.mChangedEnd = start+before;
6789            } else {
6790                ims.mChangedStart = Math.min(ims.mChangedStart, start);
6791                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
6792            }
6793            ims.mChangedDelta += after-before;
6794        }
6795
6796        sendOnTextChanged(buffer, start, before, after);
6797        onTextChanged(buffer, start, before, after);
6798
6799        // Hide the controllers if the amount of content changed
6800        if (before != after) {
6801            hideControllers();
6802        }
6803    }
6804
6805    /**
6806     * Not private so it can be called from an inner class without going
6807     * through a thunk.
6808     */
6809    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
6810        // XXX Make the start and end move together if this ends up
6811        // spending too much time invalidating.
6812
6813        boolean selChanged = false;
6814        int newSelStart=-1, newSelEnd=-1;
6815
6816        final InputMethodState ims = mInputMethodState;
6817
6818        if (what == Selection.SELECTION_END) {
6819            mHighlightPathBogus = true;
6820            selChanged = true;
6821            newSelEnd = newStart;
6822
6823            if (!isFocused()) {
6824                mSelectionMoved = true;
6825            }
6826
6827            if (oldStart >= 0 || newStart >= 0) {
6828                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
6829                registerForPreDraw();
6830
6831                if (isFocused()) {
6832                    mShowCursor = SystemClock.uptimeMillis();
6833                    makeBlink();
6834                }
6835            }
6836        }
6837
6838        if (what == Selection.SELECTION_START) {
6839            mHighlightPathBogus = true;
6840            selChanged = true;
6841            newSelStart = newStart;
6842
6843            if (!isFocused()) {
6844                mSelectionMoved = true;
6845            }
6846
6847            if (oldStart >= 0 || newStart >= 0) {
6848                int end = Selection.getSelectionEnd(buf);
6849                invalidateCursor(end, oldStart, newStart);
6850            }
6851        }
6852
6853        if (selChanged) {
6854            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
6855                if (newSelStart < 0) {
6856                    newSelStart = Selection.getSelectionStart(buf);
6857                }
6858                if (newSelEnd < 0) {
6859                    newSelEnd = Selection.getSelectionEnd(buf);
6860                }
6861                onSelectionChanged(newSelStart, newSelEnd);
6862            }
6863        }
6864
6865        if (what instanceof UpdateAppearance ||
6866            what instanceof ParagraphStyle) {
6867            if (ims == null || ims.mBatchEditNesting == 0) {
6868                invalidate();
6869                mHighlightPathBogus = true;
6870                checkForResize();
6871            } else {
6872                ims.mContentChanged = true;
6873            }
6874        }
6875
6876        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
6877            mHighlightPathBogus = true;
6878            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
6879                ims.mSelectionModeChanged = true;
6880            }
6881
6882            if (Selection.getSelectionStart(buf) >= 0) {
6883                if (ims == null || ims.mBatchEditNesting == 0) {
6884                    invalidateCursor();
6885                } else {
6886                    ims.mCursorChanged = true;
6887                }
6888            }
6889        }
6890
6891        if (what instanceof ParcelableSpan) {
6892            // If this is a span that can be sent to a remote process,
6893            // the current extract editor would be interested in it.
6894            if (ims != null && ims.mExtracting != null) {
6895                if (ims.mBatchEditNesting != 0) {
6896                    if (oldStart >= 0) {
6897                        if (ims.mChangedStart > oldStart) {
6898                            ims.mChangedStart = oldStart;
6899                        }
6900                        if (ims.mChangedStart > oldEnd) {
6901                            ims.mChangedStart = oldEnd;
6902                        }
6903                    }
6904                    if (newStart >= 0) {
6905                        if (ims.mChangedStart > newStart) {
6906                            ims.mChangedStart = newStart;
6907                        }
6908                        if (ims.mChangedStart > newEnd) {
6909                            ims.mChangedStart = newEnd;
6910                        }
6911                    }
6912                } else {
6913                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
6914                            + oldStart + "-" + oldEnd + ","
6915                            + newStart + "-" + newEnd + what);
6916                    ims.mContentChanged = true;
6917                }
6918            }
6919        }
6920    }
6921
6922    private class ChangeWatcher
6923    implements TextWatcher, SpanWatcher {
6924
6925        private CharSequence mBeforeText;
6926
6927        public void beforeTextChanged(CharSequence buffer, int start,
6928                                      int before, int after) {
6929            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
6930                    + " before=" + before + " after=" + after + ": " + buffer);
6931
6932            if (AccessibilityManager.getInstance(mContext).isEnabled()
6933                    && !isPasswordInputType(mInputType)
6934                    && !hasPasswordTransformationMethod()) {
6935                mBeforeText = buffer.toString();
6936            }
6937
6938            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
6939        }
6940
6941        public void onTextChanged(CharSequence buffer, int start,
6942                                  int before, int after) {
6943            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
6944                    + " before=" + before + " after=" + after + ": " + buffer);
6945            TextView.this.handleTextChanged(buffer, start, before, after);
6946
6947            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
6948                    (isFocused() || isSelected() &&
6949                    isShown())) {
6950                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
6951                mBeforeText = null;
6952            }
6953        }
6954
6955        public void afterTextChanged(Editable buffer) {
6956            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
6957            TextView.this.sendAfterTextChanged(buffer);
6958
6959            if (MetaKeyKeyListener.getMetaState(buffer,
6960                                 MetaKeyKeyListener.META_SELECTING) != 0) {
6961                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
6962            }
6963        }
6964
6965        public void onSpanChanged(Spannable buf,
6966                                  Object what, int s, int e, int st, int en) {
6967            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
6968                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
6969            TextView.this.spanChange(buf, what, s, st, e, en);
6970        }
6971
6972        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
6973            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
6974                    + " what=" + what + ": " + buf);
6975            TextView.this.spanChange(buf, what, -1, s, -1, e);
6976        }
6977
6978        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
6979            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
6980                    + " what=" + what + ": " + buf);
6981            TextView.this.spanChange(buf, what, s, -1, e, -1);
6982        }
6983    }
6984
6985    private void makeBlink() {
6986        if (!isCursorVisible()) {
6987            if (mBlink != null) {
6988                mBlink.removeCallbacks(mBlink);
6989            }
6990
6991            return;
6992        }
6993
6994        if (mBlink == null)
6995            mBlink = new Blink(this);
6996
6997        mBlink.removeCallbacks(mBlink);
6998        mBlink.postAtTime(mBlink, mShowCursor + BLINK);
6999    }
7000
7001    /**
7002     * @hide
7003     */
7004    @Override
7005    public void dispatchFinishTemporaryDetach() {
7006        mDispatchTemporaryDetach = true;
7007        super.dispatchFinishTemporaryDetach();
7008        mDispatchTemporaryDetach = false;
7009    }
7010
7011    @Override
7012    public void onStartTemporaryDetach() {
7013        super.onStartTemporaryDetach();
7014        // Only track when onStartTemporaryDetach() is called directly,
7015        // usually because this instance is an editable field in a list
7016        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7017    }
7018
7019    @Override
7020    public void onFinishTemporaryDetach() {
7021        super.onFinishTemporaryDetach();
7022        // Only track when onStartTemporaryDetach() is called directly,
7023        // usually because this instance is an editable field in a list
7024        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7025    }
7026
7027    @Override
7028    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7029        if (mTemporaryDetach) {
7030            // If we are temporarily in the detach state, then do nothing.
7031            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7032            return;
7033        }
7034
7035        mShowCursor = SystemClock.uptimeMillis();
7036
7037        ensureEndedBatchEdit();
7038
7039        if (focused) {
7040            int selStart = getSelectionStart();
7041            int selEnd = getSelectionEnd();
7042
7043            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7044            // mode for these, unless there was a specific selection already started.
7045            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7046                    selEnd == mText.length();
7047            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7048
7049            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7050                // If a tap was used to give focus to that view, move cursor at tap position.
7051                // Has to be done before onTakeFocus, which can be overloaded.
7052                final int lastTapPosition = getLastTapPosition();
7053                if (lastTapPosition >= 0) {
7054                    Selection.setSelection((Spannable) mText, lastTapPosition);
7055                }
7056
7057                if (mMovement != null) {
7058                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7059                }
7060
7061                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7062                // pressed. Since it is the ViewRoot's mView, it requests focus before
7063                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7064                // This special case ensure that we keep current selection in that case.
7065                // It would be better to know why the DecorView does not have focus at that time.
7066                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7067                        selStart >= 0 && selEnd >= 0) {
7068                    /*
7069                     * Someone intentionally set the selection, so let them
7070                     * do whatever it is that they wanted to do instead of
7071                     * the default on-focus behavior.  We reset the selection
7072                     * here instead of just skipping the onTakeFocus() call
7073                     * because some movement methods do something other than
7074                     * just setting the selection in theirs and we still
7075                     * need to go through that path.
7076                     */
7077                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7078                }
7079
7080                if (mSelectAllOnFocus) {
7081                    selectAll();
7082                }
7083
7084                mTouchFocusSelected = true;
7085            }
7086
7087            mFrozenWithFocus = false;
7088            mSelectionMoved = false;
7089
7090            if (mText instanceof Spannable) {
7091                Spannable sp = (Spannable) mText;
7092                MetaKeyKeyListener.resetMetaState(sp);
7093            }
7094
7095            makeBlink();
7096
7097            if (mError != null) {
7098                showError();
7099            }
7100        } else {
7101            if (mError != null) {
7102                hideError();
7103            }
7104            // Don't leave us in the middle of a batch edit.
7105            onEndBatchEdit();
7106
7107            hideInsertionPointCursorController();
7108            if (this instanceof ExtractEditText) {
7109                // terminateTextSelectionMode removes selection, which we want to keep when
7110                // ExtractEditText goes out of focus.
7111                final int selStart = getSelectionStart();
7112                final int selEnd = getSelectionEnd();
7113                terminateSelectionActionMode();
7114                Selection.setSelection((Spannable) mText, selStart, selEnd);
7115            } else {
7116                terminateSelectionActionMode();
7117            }
7118
7119            // No need to create the controller
7120            if (mSelectionModifierCursorController != null) {
7121                mSelectionModifierCursorController.resetTouchOffsets();
7122            }
7123        }
7124
7125        startStopMarquee(focused);
7126
7127        if (mTransformation != null) {
7128            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7129        }
7130
7131        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7132
7133        // Performed after super.onFocusChanged so that this TextView is registered and can ask for
7134        // the IME. Showing the IME while focus is moved using the D-Pad is a bad idea, however this
7135        // does not happen in that case (using the arrows on a bluetooth keyboard).
7136        if (focused && isTextEditable()) {
7137            final InputMethodManager imm = (InputMethodManager)
7138            getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
7139
7140            imm.showSoftInput(this, 0, null);
7141        }
7142    }
7143
7144    private int getLastTapPosition() {
7145        // No need to create the controller at that point, no last tap position saved
7146        if (mSelectionModifierCursorController != null) {
7147            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7148            if (lastTapPosition >= 0) {
7149                // Safety check, should not be possible.
7150                if (lastTapPosition > mText.length()) {
7151                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7152                            + mText.length() + ")");
7153                    lastTapPosition = mText.length();
7154                }
7155                return lastTapPosition;
7156            }
7157        }
7158
7159        return -1;
7160    }
7161
7162    @Override
7163    public void onWindowFocusChanged(boolean hasWindowFocus) {
7164        super.onWindowFocusChanged(hasWindowFocus);
7165
7166        if (hasWindowFocus) {
7167            if (mBlink != null) {
7168                mBlink.uncancel();
7169
7170                if (isFocused()) {
7171                    mShowCursor = SystemClock.uptimeMillis();
7172                    makeBlink();
7173                }
7174            }
7175        } else {
7176            if (mBlink != null) {
7177                mBlink.cancel();
7178            }
7179            // Don't leave us in the middle of a batch edit.
7180            onEndBatchEdit();
7181            if (mInputContentType != null) {
7182                mInputContentType.enterDown = false;
7183            }
7184            hideControllers();
7185        }
7186
7187        startStopMarquee(hasWindowFocus);
7188    }
7189
7190    @Override
7191    protected void onVisibilityChanged(View changedView, int visibility) {
7192        super.onVisibilityChanged(changedView, visibility);
7193        if (visibility != VISIBLE) {
7194            hideControllers();
7195        }
7196    }
7197
7198    /**
7199     * Use {@link BaseInputConnection#removeComposingSpans
7200     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7201     * state from this text view.
7202     */
7203    public void clearComposingText() {
7204        if (mText instanceof Spannable) {
7205            BaseInputConnection.removeComposingSpans((Spannable)mText);
7206        }
7207    }
7208
7209    @Override
7210    public void setSelected(boolean selected) {
7211        boolean wasSelected = isSelected();
7212
7213        super.setSelected(selected);
7214
7215        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7216            if (selected) {
7217                startMarquee();
7218            } else {
7219                stopMarquee();
7220            }
7221        }
7222    }
7223
7224    class CommitSelectionReceiver extends ResultReceiver {
7225        private final int mPrevStart, mPrevEnd;
7226
7227        public CommitSelectionReceiver(int prevStart, int prevEnd) {
7228            super(getHandler());
7229            mPrevStart = prevStart;
7230            mPrevEnd = prevEnd;
7231        }
7232
7233        @Override
7234        protected void onReceiveResult(int resultCode, Bundle resultData) {
7235            // If this tap was actually used to show the IMM, leave cursor or selection unchanged
7236            // by restoring its previous position.
7237            if (resultCode == InputMethodManager.RESULT_SHOWN) {
7238                final int len = mText.length();
7239                int start = Math.min(len, mPrevStart);
7240                int end = Math.min(len, mPrevEnd);
7241                Selection.setSelection((Spannable)mText, start, end);
7242
7243                boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7244                if (hasSelection() && !selectAllGotFocus) {
7245                    startSelectionActionMode();
7246                }
7247            }
7248        }
7249    }
7250
7251    @Override
7252    public boolean onTouchEvent(MotionEvent event) {
7253        final int action = event.getActionMasked();
7254
7255        if (hasInsertionController()) {
7256            getInsertionController().onTouchEvent(event);
7257        }
7258        if (hasSelectionController()) {
7259            getSelectionController().onTouchEvent(event);
7260        }
7261
7262        if (action == MotionEvent.ACTION_DOWN) {
7263            mLastDownPositionX = (int) event.getX();
7264            mLastDownPositionY = (int) event.getY();
7265
7266            // Reset this state; it will be re-set if super.onTouchEvent
7267            // causes focus to move to the view.
7268            mTouchFocusSelected = false;
7269            mIgnoreActionUpEvent = false;
7270        }
7271
7272        final boolean superResult = super.onTouchEvent(event);
7273
7274        /*
7275         * Don't handle the release after a long press, because it will
7276         * move the selection away from whatever the menu action was
7277         * trying to affect.
7278         */
7279        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7280            mDiscardNextActionUp = false;
7281            return superResult;
7282        }
7283
7284        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7285                isFocused();
7286
7287        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7288                && mText instanceof Spannable && mLayout != null) {
7289            boolean handled = false;
7290
7291            // Save previous selection, in case this event is used to show the IME.
7292            int oldSelStart = getSelectionStart();
7293            int oldSelEnd = getSelectionEnd();
7294
7295            final int oldScrollX = mScrollX;
7296            final int oldScrollY = mScrollY;
7297
7298            if (mMovement != null) {
7299                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7300            }
7301
7302            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7303                // The LinkMovementMethod which should handle taps on links has not been installed
7304                // to support text selection. We reproduce its behavior here to open links.
7305                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7306                        getSelectionEnd(), ClickableSpan.class);
7307
7308                if (links.length != 0) {
7309                    links[0].onClick(this);
7310                    handled = true;
7311                }
7312            }
7313
7314            if (isTextEditable() || mTextIsSelectable) {
7315                if (mScrollX != oldScrollX || mScrollY != oldScrollY) {
7316                    // Hide insertion anchor while scrolling. Leave selection.
7317                    hideInsertionPointCursorController();
7318                    // No need to create the controller, since there is nothing to update.
7319                    if (mSelectionModifierCursorController != null &&
7320                            mSelectionModifierCursorController.isShowing()) {
7321                        mSelectionModifierCursorController.updatePosition();
7322                    }
7323                }
7324
7325                if (touchIsFinished) {
7326                    CommitSelectionReceiver csr = null;
7327                    if (getSelectionStart() != oldSelStart || getSelectionEnd() != oldSelEnd ||
7328                            didTouchFocusSelect()) {
7329                        csr = new CommitSelectionReceiver(oldSelStart, oldSelEnd);
7330                    }
7331
7332                    // Show the IME, except when selecting in read-only text.
7333                    if (!mTextIsSelectable) {
7334                        final InputMethodManager imm = (InputMethodManager)
7335                                getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
7336
7337                        handled |= imm.showSoftInput(this, 0, csr) && (csr != null);
7338                    }
7339
7340                    stopSelectionActionMode();
7341                    boolean selectAllGotFocus = mSelectAllOnFocus && mTouchFocusSelected;
7342                    if (hasInsertionController() && !selectAllGotFocus) {
7343                        getInsertionController().show();
7344                    }
7345                }
7346            }
7347
7348            if (handled) {
7349                return true;
7350            }
7351        }
7352
7353        return superResult;
7354    }
7355
7356    private void prepareCursorControllers() {
7357        boolean windowSupportsHandles = false;
7358
7359        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7360        if (params instanceof WindowManager.LayoutParams) {
7361            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7362            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7363                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7364        }
7365
7366        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7367        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7368                mLayout != null;
7369
7370        if (!mInsertionControllerEnabled) {
7371            hideInsertionPointCursorController();
7372            mInsertionPointCursorController = null;
7373        }
7374
7375        if (!mSelectionControllerEnabled) {
7376            stopSelectionActionMode();
7377            mSelectionModifierCursorController = null;
7378        }
7379    }
7380
7381    /**
7382     * @return True iff this TextView contains a text that can be edited, or if this is
7383     * a selectable TextView.
7384     */
7385    private boolean isTextEditable() {
7386        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7387    }
7388
7389    /**
7390     * Returns true, only while processing a touch gesture, if the initial
7391     * touch down event caused focus to move to the text view and as a result
7392     * its selection changed.  Only valid while processing the touch gesture
7393     * of interest.
7394     */
7395    public boolean didTouchFocusSelect() {
7396        return mTouchFocusSelected;
7397    }
7398
7399    @Override
7400    public void cancelLongPress() {
7401        super.cancelLongPress();
7402        mIgnoreActionUpEvent = true;
7403    }
7404
7405    @Override
7406    public boolean onTrackballEvent(MotionEvent event) {
7407        if (mMovement != null && mText instanceof Spannable &&
7408            mLayout != null) {
7409            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7410                return true;
7411            }
7412        }
7413
7414        return super.onTrackballEvent(event);
7415    }
7416
7417    public void setScroller(Scroller s) {
7418        mScroller = s;
7419    }
7420
7421    private static class Blink extends Handler implements Runnable {
7422        private final WeakReference<TextView> mView;
7423        private boolean mCancelled;
7424
7425        public Blink(TextView v) {
7426            mView = new WeakReference<TextView>(v);
7427        }
7428
7429        public void run() {
7430            if (mCancelled) {
7431                return;
7432            }
7433
7434            removeCallbacks(Blink.this);
7435
7436            TextView tv = mView.get();
7437
7438            if (tv != null && tv.isFocused()) {
7439                int st = tv.getSelectionStart();
7440                int en = tv.getSelectionEnd();
7441
7442                if (st == en && st >= 0 && en >= 0) {
7443                    if (tv.mLayout != null) {
7444                        tv.invalidateCursorPath();
7445                    }
7446
7447                    postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7448                }
7449            }
7450        }
7451
7452        void cancel() {
7453            if (!mCancelled) {
7454                removeCallbacks(Blink.this);
7455                mCancelled = true;
7456            }
7457        }
7458
7459        void uncancel() {
7460            mCancelled = false;
7461        }
7462    }
7463
7464    @Override
7465    protected float getLeftFadingEdgeStrength() {
7466        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7467        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7468            if (mMarquee != null && !mMarquee.isStopped()) {
7469                final Marquee marquee = mMarquee;
7470                if (marquee.shouldDrawLeftFade()) {
7471                    return marquee.mScroll / getHorizontalFadingEdgeLength();
7472                } else {
7473                    return 0.0f;
7474                }
7475            } else if (getLineCount() == 1) {
7476                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7477                    case Gravity.LEFT:
7478                        return 0.0f;
7479                    case Gravity.RIGHT:
7480                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
7481                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
7482                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
7483                    case Gravity.CENTER_HORIZONTAL:
7484                        return 0.0f;
7485                }
7486            }
7487        }
7488        return super.getLeftFadingEdgeStrength();
7489    }
7490
7491    @Override
7492    protected float getRightFadingEdgeStrength() {
7493        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
7494        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7495            if (mMarquee != null && !mMarquee.isStopped()) {
7496                final Marquee marquee = mMarquee;
7497                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
7498            } else if (getLineCount() == 1) {
7499                switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
7500                    case Gravity.LEFT:
7501                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
7502                                getCompoundPaddingRight();
7503                        final float lineWidth = mLayout.getLineWidth(0);
7504                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
7505                    case Gravity.RIGHT:
7506                        return 0.0f;
7507                    case Gravity.CENTER_HORIZONTAL:
7508                    case Gravity.FILL_HORIZONTAL:
7509                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
7510                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
7511                                getHorizontalFadingEdgeLength();
7512                }
7513            }
7514        }
7515        return super.getRightFadingEdgeStrength();
7516    }
7517
7518    @Override
7519    protected int computeHorizontalScrollRange() {
7520        if (mLayout != null) {
7521            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
7522                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
7523        }
7524
7525        return super.computeHorizontalScrollRange();
7526    }
7527
7528    @Override
7529    protected int computeVerticalScrollRange() {
7530        if (mLayout != null)
7531            return mLayout.getHeight();
7532
7533        return super.computeVerticalScrollRange();
7534    }
7535
7536    @Override
7537    protected int computeVerticalScrollExtent() {
7538        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
7539    }
7540
7541    public enum BufferType {
7542        NORMAL, SPANNABLE, EDITABLE,
7543    }
7544
7545    /**
7546     * Returns the TextView_textColor attribute from the
7547     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
7548     * from the TextView_textAppearance attribute, if TextView_textColor
7549     * was not set directly.
7550     */
7551    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
7552        ColorStateList colors;
7553        colors = attrs.getColorStateList(com.android.internal.R.styleable.
7554                                         TextView_textColor);
7555
7556        if (colors == null) {
7557            int ap = attrs.getResourceId(com.android.internal.R.styleable.
7558                                         TextView_textAppearance, -1);
7559            if (ap != -1) {
7560                TypedArray appearance;
7561                appearance = context.obtainStyledAttributes(ap,
7562                                            com.android.internal.R.styleable.TextAppearance);
7563                colors = appearance.getColorStateList(com.android.internal.R.styleable.
7564                                                  TextAppearance_textColor);
7565                appearance.recycle();
7566            }
7567        }
7568
7569        return colors;
7570    }
7571
7572    /**
7573     * Returns the default color from the TextView_textColor attribute
7574     * from the AttributeSet, if set, or the default color from the
7575     * TextAppearance_textColor from the TextView_textAppearance attribute,
7576     * if TextView_textColor was not set directly.
7577     */
7578    public static int getTextColor(Context context,
7579                                   TypedArray attrs,
7580                                   int def) {
7581        ColorStateList colors = getTextColors(context, attrs);
7582
7583        if (colors == null) {
7584            return def;
7585        } else {
7586            return colors.getDefaultColor();
7587        }
7588    }
7589
7590    @Override
7591    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
7592        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
7593        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
7594            switch (keyCode) {
7595            case KeyEvent.KEYCODE_A:
7596                if (canSelectText()) {
7597                    return onTextContextMenuItem(ID_SELECT_ALL);
7598                }
7599                break;
7600            case KeyEvent.KEYCODE_X:
7601                if (canCut()) {
7602                    return onTextContextMenuItem(ID_CUT);
7603                }
7604                break;
7605            case KeyEvent.KEYCODE_C:
7606                if (canCopy()) {
7607                    return onTextContextMenuItem(ID_COPY);
7608                }
7609                break;
7610            case KeyEvent.KEYCODE_V:
7611                if (canPaste()) {
7612                    return onTextContextMenuItem(ID_PASTE);
7613                }
7614                break;
7615            }
7616        }
7617        return super.onKeyShortcut(keyCode, event);
7618    }
7619
7620    /**
7621     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
7622     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
7623     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
7624     */
7625    private boolean canSelectText() {
7626        return hasSelectionController() && mText.length() != 0;
7627    }
7628
7629    /**
7630     * Test based on the <i>intrinsic</i> charateristics of the TextView.
7631     * The text must be spannable and the movement method must allow for arbitary selection.
7632     *
7633     * See also {@link #canSelectText()}.
7634     */
7635    private boolean textCanBeSelected() {
7636        // prepareCursorController() relies on this method.
7637        // If you change this condition, make sure prepareCursorController is called anywhere
7638        // the value of this condition might be changed.
7639        return mText instanceof Spannable && mMovement != null && mMovement.canSelectArbitrarily();
7640    }
7641
7642    private boolean canCut() {
7643        if (hasPasswordTransformationMethod()) {
7644            return false;
7645        }
7646
7647        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
7648            return true;
7649        }
7650
7651        return false;
7652    }
7653
7654    private boolean canCopy() {
7655        if (hasPasswordTransformationMethod()) {
7656            return false;
7657        }
7658
7659        if (mText.length() > 0 && hasSelection()) {
7660            return true;
7661        }
7662
7663        return false;
7664    }
7665
7666    private boolean canPaste() {
7667        return (mText instanceof Editable &&
7668                mInput != null &&
7669                getSelectionStart() >= 0 &&
7670                getSelectionEnd() >= 0 &&
7671                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
7672                hasPrimaryClip());
7673    }
7674
7675    private boolean isWordCharacter(int c, int type) {
7676        return (c == '\'' || c == '"' ||
7677                type == Character.UPPERCASE_LETTER ||
7678                type == Character.LOWERCASE_LETTER ||
7679                type == Character.TITLECASE_LETTER ||
7680                type == Character.MODIFIER_LETTER ||
7681                type == Character.OTHER_LETTER || // Should handle asian characters
7682                type == Character.DECIMAL_DIGIT_NUMBER);
7683    }
7684
7685    /**
7686     * Returns the offsets delimiting the 'word' located at position offset.
7687     *
7688     * @param offset An offset in the text.
7689     * @return The offsets for the start and end of the word located at <code>offset</code>.
7690     * The two ints offsets are packed in a long using {@link #packRangeInLong(int, int)}.
7691     * Returns -1 if no valid word was found.
7692     */
7693    private long getWordLimitsAt(int offset) {
7694        int klass = mInputType & InputType.TYPE_MASK_CLASS;
7695        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
7696
7697        // Text selection is not permitted in password fields
7698        if (hasPasswordTransformationMethod()) {
7699            return -1;
7700        }
7701
7702        final int len = mText.length();
7703
7704        // Specific text fields: always select the entire text
7705        if (klass == InputType.TYPE_CLASS_NUMBER ||
7706                klass == InputType.TYPE_CLASS_PHONE ||
7707                klass == InputType.TYPE_CLASS_DATETIME ||
7708                variation == InputType.TYPE_TEXT_VARIATION_URI ||
7709                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
7710                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
7711                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
7712            return len > 0 ? packRangeInLong(0, len) : -1;
7713        }
7714
7715        int end = Math.min(offset, len);
7716        if (end < 0) {
7717            return -1;
7718        }
7719
7720        final int MAX_LENGTH = 48;
7721        int start = end;
7722
7723        for (; start > 0; start--) {
7724            final char c = mTransformed.charAt(start - 1);
7725            final int type = Character.getType(c);
7726            if (start == end && type == Character.OTHER_PUNCTUATION) {
7727                // Cases where the text ends with a '.' and we select from the end of the line
7728                // (right after the dot), or when we select from the space character in "aaa, bbb".
7729                continue;
7730            }
7731            if (type == Character.SURROGATE) { // Two Character codepoint
7732                end = start - 1; // Recheck as a pair when scanning forward
7733                continue;
7734            }
7735            if (!isWordCharacter(c, type)) break;
7736            if ((end - start) > MAX_LENGTH) return -1;
7737        }
7738
7739        for (; end < len; end++) {
7740            final int c = Character.codePointAt(mTransformed, end);
7741            final int type = Character.getType(c);
7742            if (!isWordCharacter(c, type)) break;
7743            if ((end - start) > MAX_LENGTH) return -1;
7744            if (c > 0xFFFF) { // Two Character codepoint
7745                end++;
7746            }
7747        }
7748
7749        if (start == end) {
7750            return -1;
7751        }
7752
7753        // Two ints packed in a long
7754        return packRangeInLong(start, end);
7755    }
7756
7757    private static long packRangeInLong(int start, int end) {
7758        return (((long) start) << 32) | end;
7759    }
7760
7761    private static int extractRangeStartFromLong(long range) {
7762        return (int) (range >>> 32);
7763    }
7764
7765    private static int extractRangeEndFromLong(long range) {
7766        return (int) (range & 0x00000000FFFFFFFFL);
7767    }
7768
7769    private void selectAll() {
7770        Selection.setSelection((Spannable) mText, 0, mText.length());
7771    }
7772
7773    private void selectCurrentWord() {
7774        if (!canSelectText()) {
7775            return;
7776        }
7777
7778        if (hasPasswordTransformationMethod()) {
7779            // Always select all on a password field.
7780            // Cut/copy menu entries are not available for passwords, but being able to select all
7781            // is however useful to delete or paste to replace the entire content.
7782            selectAll();
7783            return;
7784        }
7785
7786        long lastTouchOffsets = getLastTouchOffsets();
7787        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
7788        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
7789
7790        int selectionStart, selectionEnd;
7791
7792        // If a URLSpan (web address, email, phone...) is found at that position, select it.
7793        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
7794        if (urlSpans.length == 1) {
7795            URLSpan url = urlSpans[0];
7796            selectionStart = ((Spanned) mText).getSpanStart(url);
7797            selectionEnd = ((Spanned) mText).getSpanEnd(url);
7798        } else {
7799            long wordLimits = getWordLimitsAt(minOffset);
7800            if (wordLimits >= 0) {
7801                selectionStart = extractRangeStartFromLong(wordLimits);
7802            } else {
7803                selectionStart = Math.max(minOffset - 5, 0);
7804            }
7805
7806            wordLimits = getWordLimitsAt(maxOffset);
7807            if (wordLimits >= 0) {
7808                selectionEnd = extractRangeEndFromLong(wordLimits);
7809            } else {
7810                selectionEnd = Math.min(maxOffset + 5, mText.length());
7811            }
7812        }
7813
7814        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
7815    }
7816
7817    private long getLastTouchOffsets() {
7818        int minOffset, maxOffset;
7819
7820        if (mContextMenuTriggeredByKey) {
7821            minOffset = getSelectionStart();
7822            maxOffset = getSelectionEnd();
7823        } else {
7824            SelectionModifierCursorController selectionController = getSelectionController();
7825            minOffset = selectionController.getMinTouchOffset();
7826            maxOffset = selectionController.getMaxTouchOffset();
7827        }
7828
7829        return packRangeInLong(minOffset, maxOffset);
7830    }
7831
7832    @Override
7833    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
7834        if (!isShown()) {
7835            return false;
7836        }
7837
7838        final boolean isPassword = hasPasswordTransformationMethod();
7839
7840        if (!isPassword) {
7841            CharSequence text = getText();
7842            if (TextUtils.isEmpty(text)) {
7843                text = getHint();
7844            }
7845            if (!TextUtils.isEmpty(text)) {
7846                if (text.length() > AccessibilityEvent.MAX_TEXT_LENGTH) {
7847                    text = text.subSequence(0, AccessibilityEvent.MAX_TEXT_LENGTH + 1);
7848                }
7849                event.getText().add(text);
7850            }
7851        } else {
7852            event.setPassword(isPassword);
7853        }
7854        return false;
7855    }
7856
7857    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
7858            int fromIndex, int removedCount, int addedCount) {
7859        AccessibilityEvent event =
7860            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
7861        event.setFromIndex(fromIndex);
7862        event.setRemovedCount(removedCount);
7863        event.setAddedCount(addedCount);
7864        event.setBeforeText(beforeText);
7865        sendAccessibilityEventUnchecked(event);
7866    }
7867
7868    @Override
7869    protected void onCreateContextMenu(ContextMenu menu) {
7870        super.onCreateContextMenu(menu);
7871        boolean added = false;
7872        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
7873        // Problem with context menu on long press: the menu appears while the key in down and when
7874        // the key is released, the view does not receive the key_up event.
7875        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
7876        // events. We cannot simply clear these flags in onTextContextMenuItem since
7877        // it may not be called (if the user/ discards the context menu with the back key).
7878        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
7879        // available in onTextContextMenuItem.
7880        mDPadCenterIsDown = mEnterKeyIsDown = false;
7881
7882        MenuHandler handler = new MenuHandler();
7883
7884        if (mText instanceof Spanned && hasSelectionController()) {
7885            long lastTouchOffset = getLastTouchOffsets();
7886            final int selStart = extractRangeStartFromLong(lastTouchOffset);
7887            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
7888
7889            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
7890            if (urls.length > 0) {
7891                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
7892                        setOnMenuItemClickListener(handler);
7893
7894                added = true;
7895            }
7896        }
7897
7898        // The context menu is not empty, which will prevent the selection mode from starting.
7899        // Add a entry to start it in the context menu.
7900        // TODO Does not handle the case where a subclass does not call super.thisMethod or
7901        // populates the menu AFTER this call.
7902        if (menu.size() > 0) {
7903            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
7904                    setOnMenuItemClickListener(handler);
7905            added = true;
7906        }
7907
7908        if (added) {
7909            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
7910        }
7911    }
7912
7913    /**
7914     * Returns whether this text view is a current input method target.  The
7915     * default implementation just checks with {@link InputMethodManager}.
7916     */
7917    public boolean isInputMethodTarget() {
7918        InputMethodManager imm = InputMethodManager.peekInstance();
7919        return imm != null && imm.isActive(this);
7920    }
7921
7922    // Selection context mode
7923    private static final int ID_SELECT_ALL = android.R.id.selectAll;
7924    private static final int ID_CUT = android.R.id.cut;
7925    private static final int ID_COPY = android.R.id.copy;
7926    private static final int ID_PASTE = android.R.id.paste;
7927    // Context menu entries
7928    private static final int ID_COPY_URL = android.R.id.copyUrl;
7929    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
7930
7931    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
7932        public boolean onMenuItemClick(MenuItem item) {
7933            return onTextContextMenuItem(item.getItemId());
7934        }
7935    }
7936
7937    /**
7938     * Called when a context menu option for the text view is selected.  Currently
7939     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
7940     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
7941     * or {@link android.R.id#copy}.
7942     */
7943    public boolean onTextContextMenuItem(int id) {
7944        int min = 0;
7945        int max = mText.length();
7946
7947        if (isFocused()) {
7948            final int selStart = getSelectionStart();
7949            final int selEnd = getSelectionEnd();
7950
7951            min = Math.max(0, Math.min(selStart, selEnd));
7952            max = Math.max(0, Math.max(selStart, selEnd));
7953        }
7954
7955        switch (id) {
7956            case ID_COPY_URL:
7957                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
7958                if (urls.length >= 1) {
7959                    ClipData clip = null;
7960                    for (int i=0; i<urls.length; i++) {
7961                        Uri uri = Uri.parse(urls[0].getURL());
7962                        if (clip == null) {
7963                            clip = ClipData.newRawUri(null, uri);
7964                        } else {
7965                            clip.addItem(new ClipData.Item(uri));
7966                        }
7967                    }
7968                    if (clip != null) {
7969                        setPrimaryClip(clip);
7970                    }
7971                }
7972                stopSelectionActionMode();
7973                return true;
7974
7975            case ID_SELECTION_MODE:
7976                if (mSelectionActionMode != null) {
7977                    // Selection mode is already started, simply change selected part.
7978                    updateSelectedRegion();
7979                } else {
7980                    startSelectionActionMode();
7981                }
7982                return true;
7983
7984            case ID_SELECT_ALL:
7985                selectAll();
7986                // Update controller positions after selection change.
7987                if (hasSelectionController()) {
7988                    getSelectionController().show();
7989                }
7990                return true;
7991
7992            case ID_PASTE:
7993                paste(min, max);
7994                return true;
7995
7996            case ID_CUT:
7997                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
7998                ((Editable) mText).delete(min, max);
7999                stopSelectionActionMode();
8000                return true;
8001
8002            case ID_COPY:
8003                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8004                stopSelectionActionMode();
8005                return true;
8006        }
8007        return false;
8008    }
8009
8010    /**
8011     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8012     * by [min, max] when replacing this region by paste.
8013     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8014     * make sure we do not add an extra one from the paste content.
8015     */
8016    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8017        if (paste.length() > 0) {
8018            if (min > 0) {
8019                final char charBefore = mTransformed.charAt(min - 1);
8020                final char charAfter = paste.charAt(0);
8021
8022                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8023                    // Two spaces at beginning of paste: remove one
8024                    final int originalLength = mText.length();
8025                    ((Editable) mText).delete(min - 1, min);
8026                    // Due to filters, there is no guarantee that exactly one character was
8027                    // removed: count instead.
8028                    final int delta = mText.length() - originalLength;
8029                    min += delta;
8030                    max += delta;
8031                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8032                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8033                    // No space at beginning of paste: add one
8034                    final int originalLength = mText.length();
8035                    ((Editable) mText).replace(min, min, " ");
8036                    // Taking possible filters into account as above.
8037                    final int delta = mText.length() - originalLength;
8038                    min += delta;
8039                    max += delta;
8040                }
8041            }
8042
8043            if (max < mText.length()) {
8044                final char charBefore = paste.charAt(paste.length() - 1);
8045                final char charAfter = mTransformed.charAt(max);
8046
8047                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8048                    // Two spaces at end of paste: remove one
8049                    ((Editable) mText).delete(max, max + 1);
8050                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8051                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8052                    // No space at end of paste: add one
8053                    ((Editable) mText).replace(max, max, " ");
8054                }
8055            }
8056        }
8057
8058        return packRangeInLong(min, max);
8059    }
8060
8061    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8062        TextView shadowView = (TextView) inflate(mContext,
8063                com.android.internal.R.layout.text_drag_thumbnail, null);
8064
8065        if (shadowView == null) {
8066            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8067        }
8068
8069        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8070            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8071        }
8072        shadowView.setText(text);
8073        shadowView.setTextColor(getTextColors());
8074
8075        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8076        shadowView.setGravity(Gravity.CENTER);
8077
8078        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8079                ViewGroup.LayoutParams.WRAP_CONTENT));
8080
8081        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8082        shadowView.measure(size, size);
8083
8084        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8085        shadowView.invalidate();
8086        return new DragShadowBuilder(shadowView);
8087    }
8088
8089    private static class DragLocalState {
8090        public TextView sourceTextView;
8091        public int start, end;
8092
8093        public DragLocalState(TextView sourceTextView, int start, int end) {
8094            this.sourceTextView = sourceTextView;
8095            this.start = start;
8096            this.end = end;
8097        }
8098    }
8099
8100    @Override
8101    public boolean performLongClick() {
8102        if (super.performLongClick()) {
8103            mDiscardNextActionUp = true;
8104            return true;
8105        }
8106
8107        // Long press in empty space moves cursor and shows the Paste affordance if available.
8108        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8109                mInsertionControllerEnabled) {
8110            final int offset = getOffset(mLastDownPositionX, mLastDownPositionY);
8111            stopSelectionActionMode();
8112            Selection.setSelection((Spannable)mText, offset);
8113            getInsertionController().show(0);
8114            mDiscardNextActionUp = true;
8115            return true;
8116        }
8117
8118        if (mSelectionActionMode != null) {
8119            if (touchPositionIsInSelection()) {
8120                // Start a drag
8121                final int start = getSelectionStart();
8122                final int end = getSelectionEnd();
8123                CharSequence selectedText = mTransformed.subSequence(start, end);
8124                ClipData data = ClipData.newPlainText(null, selectedText);
8125                DragLocalState localState = new DragLocalState(this, start, end);
8126                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8127                stopSelectionActionMode();
8128            } else {
8129                updateSelectedRegion();
8130            }
8131            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8132            mDiscardNextActionUp = true;
8133            return true;
8134        }
8135
8136        // Start a new selection
8137        if (startSelectionActionMode()) {
8138            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8139            mDiscardNextActionUp = true;
8140            return true;
8141        }
8142
8143        return false;
8144    }
8145
8146    /**
8147     * When selection mode is already started, this method simply updates the selected part of text
8148     * to the text under the finger.
8149     */
8150    private void updateSelectedRegion() {
8151        // Start a new selection at current position, keep selectionAction mode on
8152        selectCurrentWord();
8153        // Updates handles' positions
8154        getSelectionController().show();
8155    }
8156
8157    private boolean touchPositionIsInSelection() {
8158        int selectionStart = getSelectionStart();
8159        int selectionEnd = getSelectionEnd();
8160
8161        if (selectionStart == selectionEnd) {
8162            return false;
8163        }
8164
8165        if (selectionStart > selectionEnd) {
8166            int tmp = selectionStart;
8167            selectionStart = selectionEnd;
8168            selectionEnd = tmp;
8169            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8170        }
8171
8172        SelectionModifierCursorController selectionController = getSelectionController();
8173        int minOffset = selectionController.getMinTouchOffset();
8174        int maxOffset = selectionController.getMaxTouchOffset();
8175
8176        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8177    }
8178
8179    /**
8180     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8181     * selection is initiated in this View.
8182     *
8183     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8184     * Paste actions, depending on what this View supports.
8185     *
8186     * A custom implementation can add new entries in the default menu in its
8187     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
8188     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
8189     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
8190     * {@link android.R.id#paste} ids as parameters.
8191     *
8192     * Action click events should be handled by the custom implementation of
8193     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8194     *
8195     * Note that text selection mode is not started when a TextView receives focus and the
8196     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8197     * that case, to allow for quick replacement.
8198     */
8199    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8200        mCustomSelectionActionModeCallback = actionModeCallback;
8201    }
8202
8203    /**
8204     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8205     *
8206     * @return The current custom selection callback.
8207     */
8208    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8209        return mCustomSelectionActionModeCallback;
8210    }
8211
8212    /**
8213     *
8214     * @return true if the selection mode was actually started.
8215     */
8216    private boolean startSelectionActionMode() {
8217        if (mSelectionActionMode != null) {
8218            // Selection action mode is already started
8219            return false;
8220        }
8221
8222        if (!canSelectText() || !requestFocus()) {
8223            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
8224            return false;
8225        }
8226
8227        if (!hasSelection()) {
8228            // If selection mode is started after a device rotation, there is already a selection.
8229            selectCurrentWord();
8230        }
8231
8232        if (!mTextIsSelectable) {
8233            // Show the IME, except when selection non editable text.
8234            final InputMethodManager imm = (InputMethodManager)
8235                    getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
8236            imm.showSoftInput(this, 0, null);
8237        }
8238
8239        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
8240        mSelectionActionMode = startActionMode(actionModeCallback);
8241        return mSelectionActionMode != null;
8242    }
8243
8244    /**
8245     * Same as {@link #stopSelectionActionMode()}, except that there is no cursor controller
8246     * fade out animation. Needed since the drawable and their alpha values are shared by all
8247     * TextViews. Switching from one TextView to another would fade the cursor controllers in the
8248     * new one otherwise.
8249     */
8250    private void terminateSelectionActionMode() {
8251        stopSelectionActionMode();
8252
8253        // No need to create the controller, nothing to cancel in that case.
8254        if (mSelectionModifierCursorController != null) {
8255            mSelectionModifierCursorController.cancelFadeOutAnimation();
8256        }
8257    }
8258
8259    private void stopSelectionActionMode() {
8260        if (mSelectionActionMode != null) {
8261            // This will hide the mSelectionModifierCursorController
8262            mSelectionActionMode.finish();
8263        }
8264    }
8265
8266    /**
8267     * Paste clipboard content between min and max positions.
8268     */
8269    private void paste(int min, int max) {
8270        ClipboardManager clipboard =
8271            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8272        ClipData clip = clipboard.getPrimaryClip();
8273        if (clip != null) {
8274            boolean didfirst = false;
8275            for (int i=0; i<clip.getItemCount(); i++) {
8276                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
8277                if (paste != null) {
8278                    if (!didfirst) {
8279                        long minMax = prepareSpacesAroundPaste(min, max, paste);
8280                        min = extractRangeStartFromLong(minMax);
8281                        max = extractRangeEndFromLong(minMax);
8282                        Selection.setSelection((Spannable) mText, max);
8283                        ((Editable) mText).replace(min, max, paste);
8284                    } else {
8285                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8286                        ((Editable) mText).insert(getSelectionEnd(), paste);
8287                    }
8288                }
8289            }
8290            stopSelectionActionMode();
8291            sLastCutOrCopyTime = 0;
8292        }
8293    }
8294
8295    private void setPrimaryClip(ClipData clip) {
8296        ClipboardManager clipboard = (ClipboardManager) getContext().
8297                getSystemService(Context.CLIPBOARD_SERVICE);
8298        clipboard.setPrimaryClip(clip);
8299        sLastCutOrCopyTime = SystemClock.uptimeMillis();
8300    }
8301
8302    /**
8303     * An ActionMode Callback class that is used to provide actions while in text selection mode.
8304     *
8305     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
8306     * on which of these this TextView supports.
8307     */
8308    private class SelectionActionModeCallback implements ActionMode.Callback {
8309
8310        @Override
8311        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
8312            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
8313
8314            mode.setTitle(mContext.getString(com.android.internal.R.string.textSelectionCABTitle));
8315            mode.setSubtitle(null);
8316
8317            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
8318                    setAlphabeticShortcut('a').
8319                    setShowAsAction(
8320                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8321
8322            if (canCut()) {
8323                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
8324                    setIcon(styledAttributes.getResourceId(
8325                            R.styleable.Theme_actionModeCutDrawable, 0)).
8326                    setAlphabeticShortcut('x').
8327                    setShowAsAction(
8328                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8329            }
8330
8331            if (canCopy()) {
8332                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
8333                    setIcon(styledAttributes.getResourceId(
8334                            R.styleable.Theme_actionModeCopyDrawable, 0)).
8335                    setAlphabeticShortcut('c').
8336                    setShowAsAction(
8337                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8338            }
8339
8340            if (canPaste()) {
8341                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
8342                        setIcon(styledAttributes.getResourceId(
8343                                R.styleable.Theme_actionModePasteDrawable, 0)).
8344                        setAlphabeticShortcut('v').
8345                        setShowAsAction(
8346                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
8347            }
8348
8349            styledAttributes.recycle();
8350
8351            if (mCustomSelectionActionModeCallback != null) {
8352                mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu);
8353            }
8354
8355            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
8356                getSelectionController().show();
8357                return true;
8358            } else {
8359                return false;
8360            }
8361        }
8362
8363        @Override
8364        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
8365            if (mCustomSelectionActionModeCallback != null) {
8366                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
8367            }
8368            return true;
8369        }
8370
8371        @Override
8372        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
8373            if (mCustomSelectionActionModeCallback != null &&
8374                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
8375                return true;
8376            }
8377            return onTextContextMenuItem(item.getItemId());
8378        }
8379
8380        @Override
8381        public void onDestroyActionMode(ActionMode mode) {
8382            if (mCustomSelectionActionModeCallback != null) {
8383                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
8384            }
8385            Selection.setSelection((Spannable) mText, getSelectionEnd());
8386
8387            if (mSelectionModifierCursorController != null) {
8388                mSelectionModifierCursorController.hide();
8389            }
8390
8391            mSelectionActionMode = null;
8392        }
8393    }
8394
8395    /**
8396     * A CursorController instance can be used to control a cursor in the text.
8397     * It is not used outside of {@link TextView}.
8398     * @hide
8399     */
8400    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
8401        /**
8402         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
8403         * See also {@link #hide()}.
8404         */
8405        public void show();
8406
8407        /**
8408         * Hide the cursor controller from screen.
8409         * See also {@link #show()}.
8410         */
8411        public void hide();
8412
8413        /**
8414         * @return true if the CursorController is currently visible
8415         */
8416        public boolean isShowing();
8417
8418        /**
8419         * Update the controller's position.
8420         */
8421        public void updatePosition(HandleView handle, int x, int y);
8422
8423        public void updateOffset(HandleView handle, int offset);
8424
8425        public void updatePosition();
8426
8427        public int getCurrentOffset(HandleView handle);
8428
8429        /**
8430         * This method is called by {@link #onTouchEvent(MotionEvent)} and gives the controller
8431         * a chance to become active and/or visible.
8432         * @param event The touch event
8433         */
8434        public boolean onTouchEvent(MotionEvent event);
8435
8436        /**
8437         * Called when the view is detached from window. Perform house keeping task, such as
8438         * stopping Runnable thread that would otherwise keep a reference on the context, thus
8439         * preventing the activity to be recycled.
8440         */
8441        public void onDetached();
8442    }
8443
8444    private class PastePopupMenu implements OnClickListener {
8445        private final PopupWindow mContainer;
8446        private int mPositionX;
8447        private int mPositionY;
8448        private final View[] mPasteViews = new View[4];
8449        private final int[] mPasteViewLayouts = new int[] {
8450                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
8451                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
8452
8453        public PastePopupMenu() {
8454            mContainer = new PopupWindow(TextView.this.mContext, null,
8455                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8456            mContainer.setSplitTouchEnabled(true);
8457            mContainer.setClippingEnabled(false);
8458            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8459
8460            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8461            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8462        }
8463
8464        private int viewIndex(boolean onTop) {
8465            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
8466        }
8467
8468        private void updateContent(boolean onTop) {
8469            final int viewIndex = viewIndex(onTop);
8470            View view = mPasteViews[viewIndex];
8471
8472            if (view == null) {
8473                final int layout = mPasteViewLayouts[viewIndex];
8474                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8475                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8476                if (inflater != null) {
8477                    view = inflater.inflate(layout, null);
8478                }
8479
8480                if (view == null) {
8481                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
8482                }
8483
8484                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8485                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8486                        ViewGroup.LayoutParams.WRAP_CONTENT));
8487                view.measure(size, size);
8488
8489                view.setOnClickListener(this);
8490
8491                mPasteViews[viewIndex] = view;
8492            }
8493
8494            mContainer.setContentView(view);
8495        }
8496
8497        public void show() {
8498            updateContent(true);
8499            positionAtCursor();
8500        }
8501
8502        public void hide() {
8503            mContainer.dismiss();
8504        }
8505
8506        public boolean isShowing() {
8507            return mContainer.isShowing();
8508        }
8509
8510        @Override
8511        public void onClick(View v) {
8512            if (canPaste()) {
8513                paste(getSelectionStart(), getSelectionEnd());
8514            }
8515            hide();
8516        }
8517
8518        void positionAtCursor() {
8519            View contentView = mContainer.getContentView();
8520            int width = contentView.getMeasuredWidth();
8521            int height = contentView.getMeasuredHeight();
8522            final int offset = TextView.this.getSelectionStart();
8523            final int line = mLayout.getLineForOffset(offset);
8524            final int lineTop = mLayout.getLineTop(line);
8525            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
8526
8527            final Rect bounds = sCursorControllerTempRect;
8528            bounds.left = (int) (primaryHorizontal - width / 2.0f);
8529            bounds.top = lineTop - height;
8530
8531            bounds.right = bounds.left + width;
8532            bounds.bottom = bounds.top + height;
8533
8534            convertFromViewportToContentCoordinates(bounds);
8535
8536            mPositionX = bounds.left;
8537            mPositionY = bounds.top;
8538
8539
8540            final int[] coords = mTempCoords;
8541            TextView.this.getLocationInWindow(coords);
8542            coords[0] += mPositionX;
8543            coords[1] += mPositionY;
8544
8545            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
8546            if (coords[1] < 0) {
8547                updateContent(false);
8548                // Update dimensions from new view
8549                contentView = mContainer.getContentView();
8550                width = contentView.getMeasuredWidth();
8551                height = contentView.getMeasuredHeight();
8552
8553                // Vertical clipping, move under edited line and to the side of insertion cursor
8554                // TODO bottom clipping in case there is no system bar
8555                coords[1] += height;
8556                final int lineBottom = mLayout.getLineBottom(line);
8557                final int lineHeight = lineBottom - lineTop;
8558                coords[1] += lineHeight;
8559
8560                // Move to right hand side of insertion cursor by default. TODO RTL text.
8561                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
8562                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
8563
8564                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
8565                    coords[0] += handleHalfWidth + width / 2;
8566                } else {
8567                    coords[0] -= handleHalfWidth + width / 2;
8568                }
8569            } else {
8570                // Horizontal clipping
8571                coords[0] = Math.max(0, coords[0]);
8572                coords[0] = Math.min(screenWidth - width, coords[0]);
8573            }
8574
8575            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
8576        }
8577    }
8578
8579    private class HandleView extends View {
8580        private Drawable mDrawable;
8581        private final PopupWindow mContainer;
8582        private int mPositionX;
8583        private int mPositionY;
8584        private final CursorController mController;
8585        private boolean mIsDragging;
8586        private float mTouchToWindowOffsetX;
8587        private float mTouchToWindowOffsetY;
8588        private float mHotspotX;
8589        private float mHotspotY;
8590        private int mHeight;
8591        private float mTouchOffsetY;
8592        private int mLastParentX;
8593        private int mLastParentY;
8594        private float mDownPositionX, mDownPositionY;
8595        private int mContainerPositionX, mContainerPositionY;
8596        private long mTouchTimer;
8597        private boolean mIsInsertionHandle = false;
8598        private PastePopupMenu mPastePopupWindow;
8599
8600        // Touch-up filter: number of previous positions remembered
8601        private static final int HISTORY_SIZE = 5;
8602        private static final int TOUCH_UP_FILTER_DELAY = 150;
8603        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
8604        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
8605        private int mPreviousOffsetIndex = 0;
8606        private int mNumberPreviousOffsets = 0;
8607
8608        public void startTouchUpFilter(int offset) {
8609            mNumberPreviousOffsets = 0;
8610            addPositionToTouchUpFilter(offset);
8611        }
8612
8613        public void addPositionToTouchUpFilter(int offset) {
8614            if (mNumberPreviousOffsets > 0 &&
8615                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
8616                // Make sure only actual changes of position are recorded.
8617                return;
8618            }
8619
8620            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
8621            mPreviousOffsets[mPreviousOffsetIndex] = offset;
8622            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
8623            mNumberPreviousOffsets++;
8624        }
8625
8626        public void filterOnTouchUp() {
8627            final long now = SystemClock.uptimeMillis();
8628            int i = 0;
8629            int index = 0;
8630            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
8631            while (i < iMax) {
8632                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
8633                if ((now - mPreviousOffsetsTimes[index]) >= TOUCH_UP_FILTER_DELAY) break;
8634                i++;
8635            }
8636
8637            mController.updateOffset(this, mPreviousOffsets[index]);
8638        }
8639
8640        public static final int LEFT = 0;
8641        public static final int CENTER = 1;
8642        public static final int RIGHT = 2;
8643
8644        public HandleView(CursorController controller, int pos) {
8645            super(TextView.this.mContext);
8646            mController = controller;
8647            mContainer = new PopupWindow(TextView.this.mContext, null,
8648                    com.android.internal.R.attr.textSelectHandleWindowStyle);
8649            mContainer.setSplitTouchEnabled(true);
8650            mContainer.setClippingEnabled(false);
8651            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8652
8653            setOrientation(pos);
8654        }
8655
8656        public void setOrientation(int pos) {
8657            int handleWidth;
8658            switch (pos) {
8659            case LEFT: {
8660                if (mSelectHandleLeft == null) {
8661                    mSelectHandleLeft = mContext.getResources().getDrawable(
8662                            mTextSelectHandleLeftRes);
8663                }
8664                mDrawable = mSelectHandleLeft;
8665                handleWidth = mDrawable.getIntrinsicWidth();
8666                mHotspotX = (handleWidth * 3) / 4;
8667                break;
8668            }
8669
8670            case RIGHT: {
8671                if (mSelectHandleRight == null) {
8672                    mSelectHandleRight = mContext.getResources().getDrawable(
8673                            mTextSelectHandleRightRes);
8674                }
8675                mDrawable = mSelectHandleRight;
8676                handleWidth = mDrawable.getIntrinsicWidth();
8677                mHotspotX = handleWidth / 4;
8678                break;
8679            }
8680
8681            case CENTER:
8682            default: {
8683                if (mSelectHandleCenter == null) {
8684                    mSelectHandleCenter = mContext.getResources().getDrawable(
8685                            mTextSelectHandleRes);
8686                }
8687                mDrawable = mSelectHandleCenter;
8688                handleWidth = mDrawable.getIntrinsicWidth();
8689                mHotspotX = handleWidth / 2;
8690                mIsInsertionHandle = true;
8691                break;
8692            }
8693            }
8694
8695            final int handleHeight = mDrawable.getIntrinsicHeight();
8696
8697            mTouchOffsetY = -handleHeight * 0.3f;
8698            mHotspotY = 0;
8699            mHeight = handleHeight;
8700            invalidate();
8701        }
8702
8703        @Override
8704        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
8705            setMeasuredDimension(mDrawable.getIntrinsicWidth(),
8706                    mDrawable.getIntrinsicHeight());
8707        }
8708
8709        public void show() {
8710            if (!isPositionVisible()) {
8711                hide();
8712                return;
8713            }
8714            mContainer.setContentView(this);
8715            final int[] coords = mTempCoords;
8716            TextView.this.getLocationInWindow(coords);
8717            mContainerPositionX = coords[0] + mPositionX;
8718            mContainerPositionY = coords[1] + mPositionY;
8719            mContainer.showAtLocation(TextView.this, 0, mContainerPositionX, mContainerPositionY);
8720
8721            // Hide paste view when handle is moved on screen.
8722            if (mPastePopupWindow != null) {
8723                mPastePopupWindow.hide();
8724            }
8725        }
8726
8727        public void hide() {
8728            mIsDragging = false;
8729            mContainer.dismiss();
8730            if (mPastePopupWindow != null) {
8731                mPastePopupWindow.hide();
8732            }
8733        }
8734
8735        public boolean isShowing() {
8736            return mContainer.isShowing();
8737        }
8738
8739        private boolean isPositionVisible() {
8740            // Always show a dragging handle.
8741            if (mIsDragging) {
8742                return true;
8743            }
8744
8745            if (isInBatchEditMode()) {
8746                return false;
8747            }
8748
8749            final int extendedPaddingTop = getExtendedPaddingTop();
8750            final int extendedPaddingBottom = getExtendedPaddingBottom();
8751            final int compoundPaddingLeft = getCompoundPaddingLeft();
8752            final int compoundPaddingRight = getCompoundPaddingRight();
8753
8754            final TextView hostView = TextView.this;
8755            final int left = 0;
8756            final int right = hostView.getWidth();
8757            final int top = 0;
8758            final int bottom = hostView.getHeight();
8759
8760            if (mTempRect == null) {
8761                mTempRect = new Rect();
8762            }
8763            final Rect clip = mTempRect;
8764            clip.left = left + compoundPaddingLeft;
8765            clip.top = top + extendedPaddingTop;
8766            clip.right = right - compoundPaddingRight;
8767            clip.bottom = bottom - extendedPaddingBottom;
8768
8769            final ViewParent parent = hostView.getParent();
8770            if (parent == null || !parent.getChildVisibleRect(hostView, clip, null)) {
8771                return false;
8772            }
8773
8774            final int[] coords = mTempCoords;
8775            hostView.getLocationInWindow(coords);
8776            final int posX = coords[0] + mPositionX + (int) mHotspotX;
8777            final int posY = coords[1] + mPositionY + (int) mHotspotY;
8778
8779            return posX >= clip.left && posX <= clip.right &&
8780                    posY >= clip.top && posY <= clip.bottom;
8781        }
8782
8783        private void moveTo(int x, int y) {
8784            mPositionX = x - TextView.this.mScrollX;
8785            mPositionY = y - TextView.this.mScrollY;
8786            if (isPositionVisible()) {
8787                int[] coords = null;
8788                if (mContainer.isShowing()) {
8789                    coords = mTempCoords;
8790                    TextView.this.getLocationInWindow(coords);
8791                    final int containerPositionX = coords[0] + mPositionX;
8792                    final int containerPositionY = coords[1] + mPositionY;
8793
8794                    if (containerPositionX != mContainerPositionX ||
8795                        containerPositionY != mContainerPositionY) {
8796                        mContainerPositionX = containerPositionX;
8797                        mContainerPositionY = containerPositionY;
8798
8799                        mContainer.update(mContainerPositionX, mContainerPositionY,
8800                                mRight - mLeft, mBottom - mTop);
8801
8802                        // Hide paste popup window as soon as a scroll occurs.
8803                        if (mPastePopupWindow != null) {
8804                            mPastePopupWindow.hide();
8805                        }
8806                    }
8807                } else {
8808                    show();
8809                }
8810
8811                if (mIsDragging) {
8812                    if (coords == null) {
8813                        coords = mTempCoords;
8814                        TextView.this.getLocationInWindow(coords);
8815                    }
8816                    if (coords[0] != mLastParentX || coords[1] != mLastParentY) {
8817                        mTouchToWindowOffsetX += coords[0] - mLastParentX;
8818                        mTouchToWindowOffsetY += coords[1] - mLastParentY;
8819                        mLastParentX = coords[0];
8820                        mLastParentY = coords[1];
8821                    }
8822                    // Hide paste popup window as soon as the handle is dragged.
8823                    if (mPastePopupWindow != null) {
8824                        mPastePopupWindow.hide();
8825                    }
8826                }
8827            } else {
8828                hide();
8829            }
8830        }
8831
8832        @Override
8833        protected void onDraw(Canvas c) {
8834            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
8835            mDrawable.draw(c);
8836        }
8837
8838        @Override
8839        public boolean onTouchEvent(MotionEvent ev) {
8840            switch (ev.getActionMasked()) {
8841                case MotionEvent.ACTION_DOWN: {
8842                    startTouchUpFilter(mController.getCurrentOffset(this));
8843                    mDownPositionX = ev.getRawX();
8844                    mDownPositionY = ev.getRawY();
8845                    mTouchToWindowOffsetX = mDownPositionX - mPositionX;
8846                    mTouchToWindowOffsetY = mDownPositionY - mPositionY;
8847                    final int[] coords = mTempCoords;
8848                    TextView.this.getLocationInWindow(coords);
8849                    mLastParentX = coords[0];
8850                    mLastParentY = coords[1];
8851                    mIsDragging = true;
8852                    break;
8853                }
8854
8855                case MotionEvent.ACTION_MOVE: {
8856                    final float rawX = ev.getRawX();
8857                    final float rawY = ev.getRawY();
8858                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
8859                    final float newPosY = rawY - mTouchToWindowOffsetY + mHotspotY + mTouchOffsetY;
8860
8861                    mController.updatePosition(this, Math.round(newPosX), Math.round(newPosY));
8862                    break;
8863                }
8864
8865                case MotionEvent.ACTION_UP:
8866                    if (mIsInsertionHandle) {
8867                        long delay = SystemClock.uptimeMillis() - mTouchTimer;
8868                        if (delay < ViewConfiguration.getTapTimeout()) {
8869                            if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
8870                                // Tapping on the handle dismisses the displayed paste view,
8871                                mPastePopupWindow.hide();
8872                            } else {
8873                                ((InsertionPointCursorController) mController).show(0);
8874                            }
8875                        }
8876                    }
8877                    filterOnTouchUp();
8878                    mIsDragging = false;
8879                    break;
8880
8881                case MotionEvent.ACTION_CANCEL:
8882                    mIsDragging = false;
8883                    break;
8884            }
8885            return true;
8886        }
8887
8888        public boolean isDragging() {
8889            return mIsDragging;
8890        }
8891
8892        void positionAtCursor(final int offset, boolean bottom) {
8893            addPositionToTouchUpFilter(offset);
8894            final int width = mDrawable.getIntrinsicWidth();
8895            final int height = mDrawable.getIntrinsicHeight();
8896            final int line = mLayout.getLineForOffset(offset);
8897            final int lineTop = mLayout.getLineTop(line);
8898            final int lineBottom = mLayout.getLineBottom(line);
8899
8900            final Rect bounds = sCursorControllerTempRect;
8901            bounds.left = (int) (mLayout.getPrimaryHorizontal(offset) - mHotspotX)
8902                + TextView.this.mScrollX;
8903            bounds.top = (bottom ? lineBottom : lineTop - mHeight) + TextView.this.mScrollY;
8904
8905            bounds.right = bounds.left + width;
8906            bounds.bottom = bounds.top + height;
8907
8908            convertFromViewportToContentCoordinates(bounds);
8909            moveTo(bounds.left, bounds.top);
8910        }
8911
8912        void showPastePopupWindow() {
8913            if (mIsInsertionHandle) {
8914                if (mPastePopupWindow == null) {
8915                    // Lazy initialisation: create when actually shown only.
8916                    mPastePopupWindow = new PastePopupMenu();
8917                }
8918                mPastePopupWindow.show();
8919            }
8920        }
8921    }
8922
8923    private class InsertionPointCursorController implements CursorController {
8924        private static final int DELAY_BEFORE_FADE_OUT = 4100;
8925        private static final int DELAY_BEFORE_PASTE = 2000;
8926        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000;
8927
8928        // The cursor controller image. Lazily created.
8929        private HandleView mHandle;
8930        private Runnable mHider;
8931        private Runnable mPastePopupShower;
8932
8933        public void show() {
8934            show(DELAY_BEFORE_PASTE);
8935        }
8936
8937        public void show(int delayBeforePaste) {
8938            updatePosition();
8939            hideDelayed();
8940            getHandle().show();
8941            removePastePopupCallback();
8942            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
8943            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
8944                delayBeforePaste = 0;
8945            }
8946            if (delayBeforePaste == 0 || canPaste()) {
8947                if (mPastePopupShower == null) {
8948                    mPastePopupShower = new Runnable() {
8949                        public void run() {
8950                            getHandle().showPastePopupWindow();
8951                        }
8952                    };
8953                }
8954                postDelayed(mPastePopupShower, delayBeforePaste);
8955            }
8956        }
8957
8958        private void removePastePopupCallback() {
8959            if (mPastePopupShower != null) {
8960                removeCallbacks(mPastePopupShower);
8961            }
8962        }
8963
8964        private void removeHiderCallback() {
8965            if (mHider != null) {
8966                removeCallbacks(mHider);
8967            }
8968        }
8969
8970        public void hide() {
8971            if (mHandle != null) {
8972                mHandle.hide();
8973            }
8974            removeHiderCallback();
8975            removePastePopupCallback();
8976        }
8977
8978        private void hideDelayed() {
8979            removeHiderCallback();
8980            if (mHider == null) {
8981                mHider = new Runnable() {
8982                    public void run() {
8983                        hide();
8984                    }
8985                };
8986            }
8987            postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
8988        }
8989
8990        public boolean isShowing() {
8991            return mHandle != null && mHandle.isShowing();
8992        }
8993
8994        public void updatePosition(HandleView handle, int x, int y) {
8995            final int previousOffset = getSelectionStart();
8996            int offset = getHysteresisOffset(x, y, previousOffset);
8997
8998            if (offset != previousOffset) {
8999                updateOffset(handle, offset);
9000            }
9001            hideDelayed();
9002        }
9003
9004        public void updateOffset(HandleView handle, int offset) {
9005            Selection.setSelection((Spannable) mText, offset);
9006            updatePosition();
9007        }
9008
9009        public void updatePosition() {
9010            final int offset = getSelectionStart();
9011
9012            if (offset < 0) {
9013                // Should never happen, safety check.
9014                Log.w(LOG_TAG, "Update cursor controller position called with no cursor");
9015                hide();
9016                return;
9017            }
9018
9019            getHandle().positionAtCursor(offset, true);
9020        }
9021
9022        public int getCurrentOffset(HandleView handle) {
9023            return getSelectionStart();
9024        }
9025
9026        public boolean onTouchEvent(MotionEvent ev) {
9027            return false;
9028        }
9029
9030        public void onTouchModeChanged(boolean isInTouchMode) {
9031            if (!isInTouchMode) {
9032                hide();
9033            }
9034        }
9035
9036        private HandleView getHandle() {
9037            if (mHandle == null) {
9038                mHandle = new HandleView(this, HandleView.CENTER);
9039            }
9040            return mHandle;
9041        }
9042
9043        @Override
9044        public void onDetached() {
9045            removeHiderCallback();
9046            removePastePopupCallback();
9047        }
9048    }
9049
9050    private class SelectionModifierCursorController implements CursorController {
9051        // The cursor controller images, lazily created when shown.
9052        private HandleView mStartHandle, mEndHandle;
9053        // The offsets of that last touch down event. Remembered to start selection there.
9054        private int mMinTouchOffset, mMaxTouchOffset;
9055        // Whether selection anchors are active
9056        private boolean mIsShowing;
9057
9058        // Double tap detection
9059        private long mPreviousTapUpTime = 0;
9060        private int mPreviousTapPositionX;
9061        private int mPreviousTapPositionY;
9062
9063        SelectionModifierCursorController() {
9064            resetTouchOffsets();
9065        }
9066
9067        public void show() {
9068            if (isInBatchEditMode()) {
9069                return;
9070            }
9071
9072            // Lazy object creation has to be done before updatePosition() is called.
9073            if (mStartHandle == null) mStartHandle = new HandleView(this, HandleView.LEFT);
9074            if (mEndHandle == null) mEndHandle = new HandleView(this, HandleView.RIGHT);
9075
9076            mIsShowing = true;
9077            updatePosition();
9078
9079            mStartHandle.show();
9080            mEndHandle.show();
9081
9082            hideInsertionPointCursorController();
9083        }
9084
9085        public void hide() {
9086            if (mStartHandle != null) mStartHandle.hide();
9087            if (mEndHandle != null) mEndHandle.hide();
9088            mIsShowing = false;
9089        }
9090
9091        public boolean isShowing() {
9092            return mIsShowing;
9093        }
9094
9095        public void cancelFadeOutAnimation() {
9096            hide();
9097        }
9098
9099        public void updatePosition(HandleView handle, int x, int y) {
9100            int selectionStart = getSelectionStart();
9101            int selectionEnd = getSelectionEnd();
9102
9103            final int previousOffset = handle == mStartHandle ? selectionStart : selectionEnd;
9104            int offset = getHysteresisOffset(x, y, previousOffset);
9105
9106            // Handle the case where start and end are swapped, making sure start <= end
9107            if (handle == mStartHandle) {
9108                if (selectionStart == offset || offset > selectionEnd) {
9109                    return; // no change, no need to redraw;
9110                }
9111                // If the user "closes" the selection entirely they were probably trying to
9112                // select a single character. Help them out.
9113                if (offset == selectionEnd) {
9114                    offset = selectionEnd - 1;
9115                }
9116                selectionStart = offset;
9117            } else {
9118                if (selectionEnd == offset || offset < selectionStart) {
9119                    return; // no change, no need to redraw;
9120                }
9121                // If the user "closes" the selection entirely they were probably trying to
9122                // select a single character. Help them out.
9123                if (offset == selectionStart) {
9124                    offset = selectionStart + 1;
9125                }
9126                selectionEnd = offset;
9127            }
9128
9129            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9130            updatePosition();
9131        }
9132
9133        public void updateOffset(HandleView handle, int offset) {
9134            int start = getSelectionStart();
9135            int end = getSelectionEnd();
9136
9137            if (mStartHandle == handle) {
9138                start = offset;
9139            } else {
9140                end = offset;
9141            }
9142
9143            Selection.setSelection((Spannable) mText, start, end);
9144            updatePosition();
9145        }
9146
9147        public void updatePosition() {
9148            if (!isShowing()) {
9149                return;
9150            }
9151
9152            final int selectionStart = getSelectionStart();
9153            final int selectionEnd = getSelectionEnd();
9154
9155            if ((selectionStart < 0) || (selectionEnd < 0)) {
9156                // Should never happen, safety check.
9157                Log.w(LOG_TAG, "Update selection controller position called with no cursor");
9158                hide();
9159                return;
9160            }
9161
9162            // The handles have been created since the controller isShowing().
9163            mStartHandle.positionAtCursor(selectionStart, true);
9164            mEndHandle.positionAtCursor(selectionEnd, true);
9165        }
9166
9167        public int getCurrentOffset(HandleView handle) {
9168            return mStartHandle == handle ? getSelectionStart() : getSelectionEnd();
9169        }
9170
9171        public boolean onTouchEvent(MotionEvent event) {
9172            // This is done even when the View does not have focus, so that long presses can start
9173            // selection and tap can move cursor from this tap position.
9174            if (isTextEditable() || mTextIsSelectable) {
9175                switch (event.getActionMasked()) {
9176                    case MotionEvent.ACTION_DOWN:
9177                        final int x = (int) event.getX();
9178                        final int y = (int) event.getY();
9179
9180                        // Remember finger down position, to be able to start selection from there
9181                        mMinTouchOffset = mMaxTouchOffset = getOffset(x, y);
9182
9183                        // Double tap detection
9184                        long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
9185                        if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
9186                                isPositionOnText(x, y)) {
9187                            final int deltaX = x - mPreviousTapPositionX;
9188                            final int deltaY = y - mPreviousTapPositionY;
9189                            final int distanceSquared = deltaX * deltaX + deltaY * deltaY;
9190                            if (distanceSquared < mSquaredTouchSlopDistance) {
9191                                startSelectionActionMode();
9192                                mDiscardNextActionUp = true;
9193                            }
9194                        }
9195
9196                        mPreviousTapPositionX = x;
9197                        mPreviousTapPositionY = y;
9198
9199                        break;
9200
9201                    case MotionEvent.ACTION_POINTER_DOWN:
9202                    case MotionEvent.ACTION_POINTER_UP:
9203                        // Handle multi-point gestures. Keep min and max offset positions.
9204                        // Only activated for devices that correctly handle multi-touch.
9205                        if (mContext.getPackageManager().hasSystemFeature(
9206                                PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
9207                            updateMinAndMaxOffsets(event);
9208                        }
9209                        break;
9210
9211                    case MotionEvent.ACTION_UP:
9212                        mPreviousTapUpTime = SystemClock.uptimeMillis();
9213                        break;
9214                }
9215            }
9216            return false;
9217        }
9218
9219        /**
9220         * @param event
9221         */
9222        private void updateMinAndMaxOffsets(MotionEvent event) {
9223            int pointerCount = event.getPointerCount();
9224            for (int index = 0; index < pointerCount; index++) {
9225                final int x = (int) event.getX(index);
9226                final int y = (int) event.getY(index);
9227                int offset = getOffset(x, y);
9228                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
9229                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
9230            }
9231        }
9232
9233        public int getMinTouchOffset() {
9234            return mMinTouchOffset;
9235        }
9236
9237        public int getMaxTouchOffset() {
9238            return mMaxTouchOffset;
9239        }
9240
9241        public void resetTouchOffsets() {
9242            mMinTouchOffset = mMaxTouchOffset = -1;
9243        }
9244
9245        /**
9246         * @return true iff this controller is currently used to move the selection start.
9247         */
9248        public boolean isSelectionStartDragged() {
9249            return mStartHandle != null && mStartHandle.isDragging();
9250        }
9251
9252        public void onTouchModeChanged(boolean isInTouchMode) {
9253            if (!isInTouchMode) {
9254                hide();
9255            }
9256        }
9257
9258        @Override
9259        public void onDetached() {}
9260    }
9261
9262    private void hideInsertionPointCursorController() {
9263        // No need to create the controller to hide it.
9264        if (mInsertionPointCursorController != null) {
9265            mInsertionPointCursorController.hide();
9266        }
9267    }
9268
9269    /**
9270     * Hides the insertion controller and stops text selection mode, hiding the selection controller
9271     */
9272    private void hideControllers() {
9273        hideInsertionPointCursorController();
9274        stopSelectionActionMode();
9275    }
9276
9277    /**
9278     * Get the offset character closest to the specified absolute position.
9279     *
9280     * @param x The horizontal absolute position of a point on screen
9281     * @param y The vertical absolute position of a point on screen
9282     * @return the character offset for the character whose position is closest to the specified
9283     *  position. Returns -1 if there is no layout.
9284     *
9285     * @hide
9286     */
9287    public int getOffset(int x, int y) {
9288        if (getLayout() == null) return -1;
9289        final int line = getLineAtCoordinate(y);
9290        final int offset = getOffsetAtCoordinate(line, x);
9291        return offset;
9292    }
9293
9294    int getHysteresisOffset(int x, int y, int previousOffset) {
9295        final Layout layout = getLayout();
9296        if (layout == null) return -1;
9297
9298        int line = getLineAtCoordinate(y);
9299        final int previousLine = layout.getLineForOffset(previousOffset);
9300        final int previousLineTop = layout.getLineTop(previousLine);
9301        final int previousLineBottom = layout.getLineBottom(previousLine);
9302        final int hysteresisThreshold = (previousLineBottom - previousLineTop) / 8;
9303
9304        // If new line is just before or after previous line and y position is less than
9305        // hysteresisThreshold away from previous line, keep cursor on previous line.
9306        if (((line == previousLine + 1) && ((y - previousLineBottom) < hysteresisThreshold)) ||
9307            ((line == previousLine - 1) && ((previousLineTop - y)    < hysteresisThreshold))) {
9308            line = previousLine;
9309        }
9310
9311        return getOffsetAtCoordinate(line, x);
9312    }
9313
9314    private int convertToLocalHorizontalCoordinate(int x) {
9315        x -= getTotalPaddingLeft();
9316        // Clamp the position to inside of the view.
9317        x = Math.max(0, x);
9318        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9319        x += getScrollX();
9320        return x;
9321    }
9322
9323    private int getLineAtCoordinate(int y) {
9324        y -= getTotalPaddingTop();
9325        // Clamp the position to inside of the view.
9326        y = Math.max(0, y);
9327        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9328        y += getScrollY();
9329        return getLayout().getLineForVertical(y);
9330    }
9331
9332    private int getOffsetAtCoordinate(int line, int x) {
9333        x = convertToLocalHorizontalCoordinate(x);
9334        return getLayout().getOffsetForHorizontal(line, x);
9335    }
9336
9337    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
9338     * in the view. Returns false when the position is in the empty space of left/right of text.
9339     */
9340    private boolean isPositionOnText(int x, int y) {
9341        if (getLayout() == null) return false;
9342
9343        final int line = getLineAtCoordinate(y);
9344        x = convertToLocalHorizontalCoordinate(x);
9345
9346        if (x < getLayout().getLineLeft(line)) return false;
9347        if (x > getLayout().getLineRight(line)) return false;
9348        return true;
9349    }
9350
9351    @Override
9352    public boolean onDragEvent(DragEvent event) {
9353        switch (event.getAction()) {
9354            case DragEvent.ACTION_DRAG_STARTED:
9355                return hasInsertionController();
9356
9357            case DragEvent.ACTION_DRAG_ENTERED:
9358                TextView.this.requestFocus();
9359                return true;
9360
9361            case DragEvent.ACTION_DRAG_LOCATION:
9362                final int offset = getOffset((int) event.getX(), (int) event.getY());
9363                Selection.setSelection((Spannable)mText, offset);
9364                return true;
9365
9366            case DragEvent.ACTION_DROP:
9367                onDrop(event);
9368                return true;
9369
9370            case DragEvent.ACTION_DRAG_ENDED:
9371            case DragEvent.ACTION_DRAG_EXITED:
9372            default:
9373                return true;
9374        }
9375    }
9376
9377    private void onDrop(DragEvent event) {
9378        StringBuilder content = new StringBuilder("");
9379        ClipData clipData = event.getClipData();
9380        final int itemCount = clipData.getItemCount();
9381        for (int i=0; i < itemCount; i++) {
9382            Item item = clipData.getItemAt(i);
9383            content.append(item.coerceToText(TextView.this.mContext));
9384        }
9385
9386        final int offset = getOffset((int) event.getX(), (int) event.getY());
9387
9388        Object localState = event.getLocalState();
9389        DragLocalState dragLocalState = null;
9390        if (localState instanceof DragLocalState) {
9391            dragLocalState = (DragLocalState) localState;
9392        }
9393        boolean dragDropIntoItself = dragLocalState != null &&
9394                dragLocalState.sourceTextView == this;
9395
9396        if (dragDropIntoItself) {
9397            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
9398                // A drop inside the original selection discards the drop.
9399                return;
9400            }
9401        }
9402
9403        final int originalLength = mText.length();
9404        long minMax = prepareSpacesAroundPaste(offset, offset, content);
9405        int min = extractRangeStartFromLong(minMax);
9406        int max = extractRangeEndFromLong(minMax);
9407
9408        Selection.setSelection((Spannable) mText, max);
9409        ((Editable) mText).replace(min, max, content);
9410
9411        if (dragDropIntoItself) {
9412            int dragSourceStart = dragLocalState.start;
9413            int dragSourceEnd = dragLocalState.end;
9414            if (max <= dragSourceStart) {
9415                // Inserting text before selection has shifted positions
9416                final int shift = mText.length() - originalLength;
9417                dragSourceStart += shift;
9418                dragSourceEnd += shift;
9419            }
9420
9421            // Delete original selection
9422            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
9423
9424            // Make sure we do not leave two adjacent spaces.
9425            if ((dragSourceStart == 0 ||
9426                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
9427                    (dragSourceStart == mText.length() ||
9428                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
9429                final int pos = dragSourceStart == mText.length() ?
9430                        dragSourceStart - 1 : dragSourceStart;
9431                ((Editable) mText).delete(pos, pos + 1);
9432            }
9433        }
9434    }
9435
9436    /**
9437     * @return True if this view supports insertion handles.
9438     */
9439    boolean hasInsertionController() {
9440        return mInsertionControllerEnabled;
9441    }
9442
9443    /**
9444     * @return True if this view supports selection handles.
9445     */
9446    boolean hasSelectionController() {
9447        return mSelectionControllerEnabled;
9448    }
9449
9450    InsertionPointCursorController getInsertionController() {
9451        if (!mInsertionControllerEnabled) {
9452            return null;
9453        }
9454
9455        if (mInsertionPointCursorController == null) {
9456            mInsertionPointCursorController = new InsertionPointCursorController();
9457
9458            final ViewTreeObserver observer = getViewTreeObserver();
9459            if (observer != null) {
9460                observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
9461            }
9462        }
9463
9464        return mInsertionPointCursorController;
9465    }
9466
9467    SelectionModifierCursorController getSelectionController() {
9468        if (!mSelectionControllerEnabled) {
9469            return null;
9470        }
9471
9472        if (mSelectionModifierCursorController == null) {
9473            mSelectionModifierCursorController = new SelectionModifierCursorController();
9474
9475            final ViewTreeObserver observer = getViewTreeObserver();
9476            if (observer != null) {
9477                observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
9478            }
9479        }
9480
9481        return mSelectionModifierCursorController;
9482    }
9483
9484    boolean isInBatchEditMode() {
9485        final InputMethodState ims = mInputMethodState;
9486        if (ims != null) {
9487            return ims.mBatchEditNesting > 0;
9488        }
9489        return mInBatchEditControllers;
9490    }
9491
9492    @ViewDebug.ExportedProperty(category = "text")
9493    private CharSequence            mText;
9494    private CharSequence            mTransformed;
9495    private BufferType              mBufferType = BufferType.NORMAL;
9496
9497    private int                     mInputType = EditorInfo.TYPE_NULL;
9498    private CharSequence            mHint;
9499    private Layout                  mHintLayout;
9500
9501    private KeyListener             mInput;
9502
9503    private MovementMethod          mMovement;
9504    private TransformationMethod    mTransformation;
9505    private ChangeWatcher           mChangeWatcher;
9506
9507    private ArrayList<TextWatcher>  mListeners = null;
9508
9509    // display attributes
9510    private final TextPaint         mTextPaint;
9511    private boolean                 mUserSetTextScaleX;
9512    private final Paint             mHighlightPaint;
9513    private int                     mHighlightColor = 0xCC475925;
9514    /**
9515     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
9516     * this field being protected. Will be restored as private when lineHeight
9517     * feature request 3215097 is implemented
9518     * @hide
9519     */
9520    protected Layout                mLayout;
9521
9522    private long                    mShowCursor;
9523    private Blink                   mBlink;
9524    private boolean                 mCursorVisible = true;
9525
9526    // Cursor Controllers.
9527    private InsertionPointCursorController mInsertionPointCursorController;
9528    private SelectionModifierCursorController mSelectionModifierCursorController;
9529    private ActionMode              mSelectionActionMode;
9530    private boolean                 mInsertionControllerEnabled;
9531    private boolean                 mSelectionControllerEnabled;
9532    private boolean                 mInBatchEditControllers;
9533
9534    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
9535    // select from the current cursor position. Otherwise, select from long pressed position.
9536    private boolean                 mDPadCenterIsDown = false;
9537    private boolean                 mEnterKeyIsDown = false;
9538    private boolean                 mContextMenuTriggeredByKey = false;
9539    // Created once and shared by different CursorController helper methods.
9540    // Only one cursor controller is active at any time which prevent race conditions.
9541    private static Rect             sCursorControllerTempRect = new Rect();
9542
9543    private boolean                 mSelectAllOnFocus = false;
9544
9545    private int                     mGravity = Gravity.TOP | Gravity.LEFT;
9546    private boolean                 mHorizontallyScrolling;
9547
9548    private int                     mAutoLinkMask;
9549    private boolean                 mLinksClickable = true;
9550
9551    private float                   mSpacingMult = 1;
9552    private float                   mSpacingAdd = 0;
9553    private boolean                 mTextIsSelectable = false;
9554
9555    private static final int        LINES = 1;
9556    private static final int        EMS = LINES;
9557    private static final int        PIXELS = 2;
9558
9559    private int                     mMaximum = Integer.MAX_VALUE;
9560    private int                     mMaxMode = LINES;
9561    private int                     mMinimum = 0;
9562    private int                     mMinMode = LINES;
9563
9564    private int                     mMaxWidth = Integer.MAX_VALUE;
9565    private int                     mMaxWidthMode = PIXELS;
9566    private int                     mMinWidth = 0;
9567    private int                     mMinWidthMode = PIXELS;
9568
9569    private boolean                 mSingleLine;
9570    private int                     mDesiredHeightAtMeasure = -1;
9571    private boolean                 mIncludePad = true;
9572
9573    // tmp primitives, so we don't alloc them on each draw
9574    private Path                    mHighlightPath;
9575    private boolean                 mHighlightPathBogus = true;
9576    private static final RectF      sTempRect = new RectF();
9577
9578    // XXX should be much larger
9579    private static final int        VERY_WIDE = 16384;
9580
9581    private static final int        BLINK = 500;
9582
9583    private static final int ANIMATED_SCROLL_GAP = 250;
9584    private long mLastScroll;
9585    private Scroller mScroller = null;
9586
9587    private BoringLayout.Metrics mBoring;
9588    private BoringLayout.Metrics mHintBoring;
9589
9590    private BoringLayout mSavedLayout, mSavedHintLayout;
9591
9592    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
9593    private InputFilter[] mFilters = NO_FILTERS;
9594    private static final Spanned EMPTY_SPANNED = new SpannedString("");
9595    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
9596    // System wide time for last cut or copy action.
9597    private static long sLastCutOrCopyTime;
9598    // Used to highlight a word when it is corrected by the IME
9599    private CorrectionHighlighter mCorrectionHighlighter;
9600    // New state used to change background based on whether this TextView is multiline.
9601    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
9602}
9603