TextView.java revision c2d256b41587ff44efb6373885affe02e5df80b5 
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 android.R;
20import android.content.ClipData;
21import android.content.ClipData.Item;
22import android.content.ClipboardManager;
23import android.content.Context;
24import android.content.pm.PackageManager;
25import android.content.res.ColorStateList;
26import android.content.res.Resources;
27import android.content.res.TypedArray;
28import android.content.res.XmlResourceParser;
29import android.graphics.Canvas;
30import android.graphics.Color;
31import android.graphics.Paint;
32import android.graphics.Path;
33import android.graphics.Rect;
34import android.graphics.RectF;
35import android.graphics.Typeface;
36import android.graphics.drawable.Drawable;
37import android.inputmethodservice.ExtractEditText;
38import android.net.Uri;
39import android.os.Bundle;
40import android.os.Handler;
41import android.os.Message;
42import android.os.Parcel;
43import android.os.Parcelable;
44import android.os.SystemClock;
45import android.text.BoringLayout;
46import android.text.DynamicLayout;
47import android.text.Editable;
48import android.text.GetChars;
49import android.text.GraphicsOperations;
50import android.text.InputFilter;
51import android.text.InputType;
52import android.text.Layout;
53import android.text.ParcelableSpan;
54import android.text.Selection;
55import android.text.SpanWatcher;
56import android.text.Spannable;
57import android.text.SpannableString;
58import android.text.SpannableStringBuilder;
59import android.text.Spanned;
60import android.text.SpannedString;
61import android.text.StaticLayout;
62import android.text.TextDirectionHeuristic;
63import android.text.TextDirectionHeuristics;
64import android.text.TextDirectionHeuristics.AnyStrong;
65import android.text.TextDirectionHeuristics.CharCount;
66import android.text.TextDirectionHeuristics.FirstStrong;
67import android.text.TextDirectionHeuristics.TextDirectionAlgorithm;
68import android.text.TextDirectionHeuristics.TextDirectionHeuristicImpl;
69import android.text.TextPaint;
70import android.text.TextUtils;
71import android.text.TextWatcher;
72import android.text.method.AllCapsTransformationMethod;
73import android.text.method.ArrowKeyMovementMethod;
74import android.text.method.DateKeyListener;
75import android.text.method.DateTimeKeyListener;
76import android.text.method.DialerKeyListener;
77import android.text.method.DigitsKeyListener;
78import android.text.method.KeyListener;
79import android.text.method.LinkMovementMethod;
80import android.text.method.MetaKeyKeyListener;
81import android.text.method.MovementMethod;
82import android.text.method.PasswordTransformationMethod;
83import android.text.method.SingleLineTransformationMethod;
84import android.text.method.TextKeyListener;
85import android.text.method.TimeKeyListener;
86import android.text.method.TransformationMethod;
87import android.text.method.TransformationMethod2;
88import android.text.method.WordIterator;
89import android.text.style.ClickableSpan;
90import android.text.style.ParagraphStyle;
91import android.text.style.SuggestionSpan;
92import android.text.style.TextAppearanceSpan;
93import android.text.style.URLSpan;
94import android.text.style.UnderlineSpan;
95import android.text.style.UpdateAppearance;
96import android.text.util.Linkify;
97import android.util.AttributeSet;
98import android.util.DisplayMetrics;
99import android.util.FloatMath;
100import android.util.Log;
101import android.util.TypedValue;
102import android.view.ActionMode;
103import android.view.ActionMode.Callback;
104import android.view.ContextMenu;
105import android.view.DragEvent;
106import android.view.Gravity;
107import android.view.HapticFeedbackConstants;
108import android.view.KeyCharacterMap;
109import android.view.KeyEvent;
110import android.view.LayoutInflater;
111import android.view.Menu;
112import android.view.MenuItem;
113import android.view.MotionEvent;
114import android.view.View;
115import android.view.ViewConfiguration;
116import android.view.ViewDebug;
117import android.view.ViewGroup;
118import android.view.ViewGroup.LayoutParams;
119import android.view.ViewParent;
120import android.view.ViewRootImpl;
121import android.view.ViewTreeObserver;
122import android.view.WindowManager;
123import android.view.accessibility.AccessibilityEvent;
124import android.view.accessibility.AccessibilityManager;
125import android.view.accessibility.AccessibilityNodeInfo;
126import android.view.animation.AnimationUtils;
127import android.view.inputmethod.BaseInputConnection;
128import android.view.inputmethod.CompletionInfo;
129import android.view.inputmethod.CorrectionInfo;
130import android.view.inputmethod.EditorInfo;
131import android.view.inputmethod.ExtractedText;
132import android.view.inputmethod.ExtractedTextRequest;
133import android.view.inputmethod.InputConnection;
134import android.view.inputmethod.InputMethodManager;
135import android.widget.RemoteViews.RemoteView;
136
137import com.android.internal.util.FastMath;
138import com.android.internal.widget.EditableInputConnection;
139
140import org.xmlpull.v1.XmlPullParserException;
141
142import java.io.IOException;
143import java.lang.ref.WeakReference;
144import java.text.BreakIterator;
145import java.util.ArrayList;
146import java.util.Arrays;
147import java.util.Comparator;
148import java.util.HashMap;
149
150/**
151 * Displays text to the user and optionally allows them to edit it.  A TextView
152 * is a complete text editor, however the basic class is configured to not
153 * allow editing; see {@link EditText} for a subclass that configures the text
154 * view for editing.
155 *
156 * <p>
157 * <b>XML attributes</b>
158 * <p>
159 * See {@link android.R.styleable#TextView TextView Attributes},
160 * {@link android.R.styleable#View View Attributes}
161 *
162 * @attr ref android.R.styleable#TextView_text
163 * @attr ref android.R.styleable#TextView_bufferType
164 * @attr ref android.R.styleable#TextView_hint
165 * @attr ref android.R.styleable#TextView_textColor
166 * @attr ref android.R.styleable#TextView_textColorHighlight
167 * @attr ref android.R.styleable#TextView_textColorHint
168 * @attr ref android.R.styleable#TextView_textAppearance
169 * @attr ref android.R.styleable#TextView_textColorLink
170 * @attr ref android.R.styleable#TextView_textSize
171 * @attr ref android.R.styleable#TextView_textScaleX
172 * @attr ref android.R.styleable#TextView_typeface
173 * @attr ref android.R.styleable#TextView_textStyle
174 * @attr ref android.R.styleable#TextView_cursorVisible
175 * @attr ref android.R.styleable#TextView_maxLines
176 * @attr ref android.R.styleable#TextView_maxHeight
177 * @attr ref android.R.styleable#TextView_lines
178 * @attr ref android.R.styleable#TextView_height
179 * @attr ref android.R.styleable#TextView_minLines
180 * @attr ref android.R.styleable#TextView_minHeight
181 * @attr ref android.R.styleable#TextView_maxEms
182 * @attr ref android.R.styleable#TextView_maxWidth
183 * @attr ref android.R.styleable#TextView_ems
184 * @attr ref android.R.styleable#TextView_width
185 * @attr ref android.R.styleable#TextView_minEms
186 * @attr ref android.R.styleable#TextView_minWidth
187 * @attr ref android.R.styleable#TextView_gravity
188 * @attr ref android.R.styleable#TextView_scrollHorizontally
189 * @attr ref android.R.styleable#TextView_password
190 * @attr ref android.R.styleable#TextView_singleLine
191 * @attr ref android.R.styleable#TextView_selectAllOnFocus
192 * @attr ref android.R.styleable#TextView_includeFontPadding
193 * @attr ref android.R.styleable#TextView_maxLength
194 * @attr ref android.R.styleable#TextView_shadowColor
195 * @attr ref android.R.styleable#TextView_shadowDx
196 * @attr ref android.R.styleable#TextView_shadowDy
197 * @attr ref android.R.styleable#TextView_shadowRadius
198 * @attr ref android.R.styleable#TextView_autoLink
199 * @attr ref android.R.styleable#TextView_linksClickable
200 * @attr ref android.R.styleable#TextView_numeric
201 * @attr ref android.R.styleable#TextView_digits
202 * @attr ref android.R.styleable#TextView_phoneNumber
203 * @attr ref android.R.styleable#TextView_inputMethod
204 * @attr ref android.R.styleable#TextView_capitalize
205 * @attr ref android.R.styleable#TextView_autoText
206 * @attr ref android.R.styleable#TextView_editable
207 * @attr ref android.R.styleable#TextView_freezesText
208 * @attr ref android.R.styleable#TextView_ellipsize
209 * @attr ref android.R.styleable#TextView_drawableTop
210 * @attr ref android.R.styleable#TextView_drawableBottom
211 * @attr ref android.R.styleable#TextView_drawableRight
212 * @attr ref android.R.styleable#TextView_drawableLeft
213 * @attr ref android.R.styleable#TextView_drawablePadding
214 * @attr ref android.R.styleable#TextView_lineSpacingExtra
215 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
216 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
217 * @attr ref android.R.styleable#TextView_inputType
218 * @attr ref android.R.styleable#TextView_imeOptions
219 * @attr ref android.R.styleable#TextView_privateImeOptions
220 * @attr ref android.R.styleable#TextView_imeActionLabel
221 * @attr ref android.R.styleable#TextView_imeActionId
222 * @attr ref android.R.styleable#TextView_editorExtras
223 * @attr ref android.R.styleable#TextView_suggestionsEnabled
224 */
225@RemoteView
226public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
227    static final String LOG_TAG = "TextView";
228    static final boolean DEBUG_EXTRACT = false;
229
230    private static final int PRIORITY = 100;
231    private int mCurrentAlpha = 255;
232
233    final int[] mTempCoords = new int[2];
234    Rect mTempRect;
235
236    private ColorStateList mTextColor;
237    private int mCurTextColor;
238    private ColorStateList mHintTextColor;
239    private ColorStateList mLinkTextColor;
240    private int mCurHintTextColor;
241    private boolean mFreezesText;
242    private boolean mFrozenWithFocus;
243    private boolean mTemporaryDetach;
244    private boolean mDispatchTemporaryDetach;
245
246    private boolean mDiscardNextActionUp = false;
247    private boolean mIgnoreActionUpEvent = false;
248
249    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
250    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
251
252    private float mShadowRadius, mShadowDx, mShadowDy;
253
254    private static final int PREDRAW_NOT_REGISTERED = 0;
255    private static final int PREDRAW_PENDING = 1;
256    private static final int PREDRAW_DONE = 2;
257    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
258
259    private TextUtils.TruncateAt mEllipsize = null;
260
261    // Enum for the "typeface" XML parameter.
262    // TODO: How can we get this from the XML instead of hardcoding it here?
263    private static final int SANS = 1;
264    private static final int SERIF = 2;
265    private static final int MONOSPACE = 3;
266
267    // Bitfield for the "numeric" XML parameter.
268    // TODO: How can we get this from the XML instead of hardcoding it here?
269    private static final int SIGNED = 2;
270    private static final int DECIMAL = 4;
271
272    class Drawables {
273        final Rect mCompoundRect = new Rect();
274        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
275                mDrawableStart, mDrawableEnd;
276        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
277                mDrawableSizeStart, mDrawableSizeEnd;
278        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
279                mDrawableHeightStart, mDrawableHeightEnd;
280        int mDrawablePadding;
281    }
282    private Drawables mDrawables;
283
284    private CharSequence mError;
285    private boolean mErrorWasChanged;
286    private ErrorPopup mPopup;
287    /**
288     * This flag is set if the TextView tries to display an error before it
289     * is attached to the window (so its position is still unknown).
290     * It causes the error to be shown later, when onAttachedToWindow()
291     * is called.
292     */
293    private boolean mShowErrorAfterAttach;
294
295    private CharWrapper mCharWrapper = null;
296
297    private boolean mSelectionMoved = false;
298    private boolean mTouchFocusSelected = false;
299
300    private Marquee mMarquee;
301    private boolean mRestartMarquee;
302
303    private int mMarqueeRepeatLimit = 3;
304
305    class InputContentType {
306        int imeOptions = EditorInfo.IME_NULL;
307        String privateImeOptions;
308        CharSequence imeActionLabel;
309        int imeActionId;
310        Bundle extras;
311        OnEditorActionListener onEditorActionListener;
312        boolean enterDown;
313    }
314    InputContentType mInputContentType;
315
316    class InputMethodState {
317        Rect mCursorRectInWindow = new Rect();
318        RectF mTmpRectF = new RectF();
319        float[] mTmpOffset = new float[2];
320        ExtractedTextRequest mExtracting;
321        final ExtractedText mTmpExtracted = new ExtractedText();
322        int mBatchEditNesting;
323        boolean mCursorChanged;
324        boolean mSelectionModeChanged;
325        boolean mContentChanged;
326        int mChangedStart, mChangedEnd, mChangedDelta;
327    }
328    InputMethodState mInputMethodState;
329
330    private int mTextSelectHandleLeftRes;
331    private int mTextSelectHandleRightRes;
332    private int mTextSelectHandleRes;
333
334    private int mTextEditSuggestionItemLayout;
335    private SuggestionsPopupWindow mSuggestionsPopupWindow;
336    private SuggestionRangeSpan mSuggestionRangeSpan;
337    private boolean mSuggestionsEnabled = true;
338
339    private int mCursorDrawableRes;
340    private final Drawable[] mCursorDrawable = new Drawable[2];
341    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
342
343    private Drawable mSelectHandleLeft;
344    private Drawable mSelectHandleRight;
345    private Drawable mSelectHandleCenter;
346
347    // Global listener that detects changes in the global position of the TextView
348    private PositionListener mPositionListener;
349
350    private float mLastDownPositionX, mLastDownPositionY;
351    private Callback mCustomSelectionActionModeCallback;
352
353    private final int mSquaredTouchSlopDistance;
354    // Set when this TextView gained focus with some text selected. Will start selection mode.
355    private boolean mCreatedWithASelection = false;
356
357    private WordIterator mWordIterator;
358
359    // The alignment to pass to Layout, or null if not resolved.
360    private Layout.Alignment mLayoutAlignment;
361
362    // The default value for mTextAlign.
363    private TextAlign mTextAlign = TextAlign.INHERIT;
364
365    private static enum TextAlign {
366        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
367    }
368
369    private boolean mResolvedDrawables = false;
370
371    /*
372     * Kick-start the font cache for the zygote process (to pay the cost of
373     * initializing freetype for our default font only once).
374     */
375    static {
376        Paint p = new Paint();
377        p.setAntiAlias(true);
378        // We don't care about the result, just the side-effect of measuring.
379        p.measureText("H");
380    }
381
382    /**
383     * Interface definition for a callback to be invoked when an action is
384     * performed on the editor.
385     */
386    public interface OnEditorActionListener {
387        /**
388         * Called when an action is being performed.
389         *
390         * @param v The view that was clicked.
391         * @param actionId Identifier of the action.  This will be either the
392         * identifier you supplied, or {@link EditorInfo#IME_NULL
393         * EditorInfo.IME_NULL} if being called due to the enter key
394         * being pressed.
395         * @param event If triggered by an enter key, this is the event;
396         * otherwise, this is null.
397         * @return Return true if you have consumed the action, else false.
398         */
399        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
400    }
401
402    public TextView(Context context) {
403        this(context, null);
404    }
405
406    public TextView(Context context,
407                    AttributeSet attrs) {
408        this(context, attrs, com.android.internal.R.attr.textViewStyle);
409    }
410
411    @SuppressWarnings("deprecation")
412    public TextView(Context context,
413                    AttributeSet attrs,
414                    int defStyle) {
415        super(context, attrs, defStyle);
416        mText = "";
417
418        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
419        mTextPaint.density = getResources().getDisplayMetrics().density;
420        mTextPaint.setCompatibilityScaling(
421                getResources().getCompatibilityInfo().applicationScale);
422
423        // If we get the paint from the skin, we should set it to left, since
424        // the layout always wants it to be left.
425        // mTextPaint.setTextAlign(Paint.Align.LEFT);
426
427        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
428        mHighlightPaint.setCompatibilityScaling(
429                getResources().getCompatibilityInfo().applicationScale);
430
431        mMovement = getDefaultMovementMethod();
432        mTransformation = null;
433
434        TypedArray a =
435            context.obtainStyledAttributes(
436                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
437
438        int textColorHighlight = 0;
439        ColorStateList textColor = null;
440        ColorStateList textColorHint = null;
441        ColorStateList textColorLink = null;
442        int textSize = 15;
443        int typefaceIndex = -1;
444        int styleIndex = -1;
445        boolean allCaps = false;
446
447        /*
448         * Look the appearance up without checking first if it exists because
449         * almost every TextView has one and it greatly simplifies the logic
450         * to be able to parse the appearance first and then let specific tags
451         * for this View override it.
452         */
453        TypedArray appearance = null;
454        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
455        if (ap != -1) {
456            appearance = context.obtainStyledAttributes(ap,
457                                com.android.internal.R.styleable.
458                                TextAppearance);
459        }
460        if (appearance != null) {
461            int n = appearance.getIndexCount();
462            for (int i = 0; i < n; i++) {
463                int attr = appearance.getIndex(i);
464
465                switch (attr) {
466                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
467                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
468                    break;
469
470                case com.android.internal.R.styleable.TextAppearance_textColor:
471                    textColor = appearance.getColorStateList(attr);
472                    break;
473
474                case com.android.internal.R.styleable.TextAppearance_textColorHint:
475                    textColorHint = appearance.getColorStateList(attr);
476                    break;
477
478                case com.android.internal.R.styleable.TextAppearance_textColorLink:
479                    textColorLink = appearance.getColorStateList(attr);
480                    break;
481
482                case com.android.internal.R.styleable.TextAppearance_textSize:
483                    textSize = appearance.getDimensionPixelSize(attr, textSize);
484                    break;
485
486                case com.android.internal.R.styleable.TextAppearance_typeface:
487                    typefaceIndex = appearance.getInt(attr, -1);
488                    break;
489
490                case com.android.internal.R.styleable.TextAppearance_textStyle:
491                    styleIndex = appearance.getInt(attr, -1);
492                    break;
493
494                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
495                    allCaps = appearance.getBoolean(attr, false);
496                    break;
497                }
498            }
499
500            appearance.recycle();
501        }
502
503        boolean editable = getDefaultEditable();
504        CharSequence inputMethod = null;
505        int numeric = 0;
506        CharSequence digits = null;
507        boolean phone = false;
508        boolean autotext = false;
509        int autocap = -1;
510        int buffertype = 0;
511        boolean selectallonfocus = false;
512        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
513            drawableBottom = null, drawableStart = null, drawableEnd = null;
514        int drawablePadding = 0;
515        int ellipsize = -1;
516        boolean singleLine = false;
517        int maxlength = -1;
518        CharSequence text = "";
519        CharSequence hint = null;
520        int shadowcolor = 0;
521        float dx = 0, dy = 0, r = 0;
522        boolean password = false;
523        int inputType = EditorInfo.TYPE_NULL;
524
525        int n = a.getIndexCount();
526        for (int i = 0; i < n; i++) {
527            int attr = a.getIndex(i);
528
529            switch (attr) {
530            case com.android.internal.R.styleable.TextView_editable:
531                editable = a.getBoolean(attr, editable);
532                break;
533
534            case com.android.internal.R.styleable.TextView_inputMethod:
535                inputMethod = a.getText(attr);
536                break;
537
538            case com.android.internal.R.styleable.TextView_numeric:
539                numeric = a.getInt(attr, numeric);
540                break;
541
542            case com.android.internal.R.styleable.TextView_digits:
543                digits = a.getText(attr);
544                break;
545
546            case com.android.internal.R.styleable.TextView_phoneNumber:
547                phone = a.getBoolean(attr, phone);
548                break;
549
550            case com.android.internal.R.styleable.TextView_autoText:
551                autotext = a.getBoolean(attr, autotext);
552                break;
553
554            case com.android.internal.R.styleable.TextView_capitalize:
555                autocap = a.getInt(attr, autocap);
556                break;
557
558            case com.android.internal.R.styleable.TextView_bufferType:
559                buffertype = a.getInt(attr, buffertype);
560                break;
561
562            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
563                selectallonfocus = a.getBoolean(attr, selectallonfocus);
564                break;
565
566            case com.android.internal.R.styleable.TextView_autoLink:
567                mAutoLinkMask = a.getInt(attr, 0);
568                break;
569
570            case com.android.internal.R.styleable.TextView_linksClickable:
571                mLinksClickable = a.getBoolean(attr, true);
572                break;
573
574            case com.android.internal.R.styleable.TextView_drawableLeft:
575                drawableLeft = a.getDrawable(attr);
576                break;
577
578            case com.android.internal.R.styleable.TextView_drawableTop:
579                drawableTop = a.getDrawable(attr);
580                break;
581
582            case com.android.internal.R.styleable.TextView_drawableRight:
583                drawableRight = a.getDrawable(attr);
584                break;
585
586            case com.android.internal.R.styleable.TextView_drawableBottom:
587                drawableBottom = a.getDrawable(attr);
588                break;
589
590            case com.android.internal.R.styleable.TextView_drawableStart:
591                drawableStart = a.getDrawable(attr);
592                break;
593
594            case com.android.internal.R.styleable.TextView_drawableEnd:
595                drawableEnd = a.getDrawable(attr);
596                break;
597
598            case com.android.internal.R.styleable.TextView_drawablePadding:
599                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
600                break;
601
602            case com.android.internal.R.styleable.TextView_maxLines:
603                setMaxLines(a.getInt(attr, -1));
604                break;
605
606            case com.android.internal.R.styleable.TextView_maxHeight:
607                setMaxHeight(a.getDimensionPixelSize(attr, -1));
608                break;
609
610            case com.android.internal.R.styleable.TextView_lines:
611                setLines(a.getInt(attr, -1));
612                break;
613
614            case com.android.internal.R.styleable.TextView_height:
615                setHeight(a.getDimensionPixelSize(attr, -1));
616                break;
617
618            case com.android.internal.R.styleable.TextView_minLines:
619                setMinLines(a.getInt(attr, -1));
620                break;
621
622            case com.android.internal.R.styleable.TextView_minHeight:
623                setMinHeight(a.getDimensionPixelSize(attr, -1));
624                break;
625
626            case com.android.internal.R.styleable.TextView_maxEms:
627                setMaxEms(a.getInt(attr, -1));
628                break;
629
630            case com.android.internal.R.styleable.TextView_maxWidth:
631                setMaxWidth(a.getDimensionPixelSize(attr, -1));
632                break;
633
634            case com.android.internal.R.styleable.TextView_ems:
635                setEms(a.getInt(attr, -1));
636                break;
637
638            case com.android.internal.R.styleable.TextView_width:
639                setWidth(a.getDimensionPixelSize(attr, -1));
640                break;
641
642            case com.android.internal.R.styleable.TextView_minEms:
643                setMinEms(a.getInt(attr, -1));
644                break;
645
646            case com.android.internal.R.styleable.TextView_minWidth:
647                setMinWidth(a.getDimensionPixelSize(attr, -1));
648                break;
649
650            case com.android.internal.R.styleable.TextView_gravity:
651                setGravity(a.getInt(attr, -1));
652                break;
653
654            case com.android.internal.R.styleable.TextView_hint:
655                hint = a.getText(attr);
656                break;
657
658            case com.android.internal.R.styleable.TextView_text:
659                text = a.getText(attr);
660                break;
661
662            case com.android.internal.R.styleable.TextView_scrollHorizontally:
663                if (a.getBoolean(attr, false)) {
664                    setHorizontallyScrolling(true);
665                }
666                break;
667
668            case com.android.internal.R.styleable.TextView_singleLine:
669                singleLine = a.getBoolean(attr, singleLine);
670                break;
671
672            case com.android.internal.R.styleable.TextView_ellipsize:
673                ellipsize = a.getInt(attr, ellipsize);
674                break;
675
676            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
677                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
678                break;
679
680            case com.android.internal.R.styleable.TextView_includeFontPadding:
681                if (!a.getBoolean(attr, true)) {
682                    setIncludeFontPadding(false);
683                }
684                break;
685
686            case com.android.internal.R.styleable.TextView_cursorVisible:
687                if (!a.getBoolean(attr, true)) {
688                    setCursorVisible(false);
689                }
690                break;
691
692            case com.android.internal.R.styleable.TextView_maxLength:
693                maxlength = a.getInt(attr, -1);
694                break;
695
696            case com.android.internal.R.styleable.TextView_textScaleX:
697                setTextScaleX(a.getFloat(attr, 1.0f));
698                break;
699
700            case com.android.internal.R.styleable.TextView_freezesText:
701                mFreezesText = a.getBoolean(attr, false);
702                break;
703
704            case com.android.internal.R.styleable.TextView_shadowColor:
705                shadowcolor = a.getInt(attr, 0);
706                break;
707
708            case com.android.internal.R.styleable.TextView_shadowDx:
709                dx = a.getFloat(attr, 0);
710                break;
711
712            case com.android.internal.R.styleable.TextView_shadowDy:
713                dy = a.getFloat(attr, 0);
714                break;
715
716            case com.android.internal.R.styleable.TextView_shadowRadius:
717                r = a.getFloat(attr, 0);
718                break;
719
720            case com.android.internal.R.styleable.TextView_enabled:
721                setEnabled(a.getBoolean(attr, isEnabled()));
722                break;
723
724            case com.android.internal.R.styleable.TextView_textColorHighlight:
725                textColorHighlight = a.getColor(attr, textColorHighlight);
726                break;
727
728            case com.android.internal.R.styleable.TextView_textColor:
729                textColor = a.getColorStateList(attr);
730                break;
731
732            case com.android.internal.R.styleable.TextView_textColorHint:
733                textColorHint = a.getColorStateList(attr);
734                break;
735
736            case com.android.internal.R.styleable.TextView_textColorLink:
737                textColorLink = a.getColorStateList(attr);
738                break;
739
740            case com.android.internal.R.styleable.TextView_textSize:
741                textSize = a.getDimensionPixelSize(attr, textSize);
742                break;
743
744            case com.android.internal.R.styleable.TextView_typeface:
745                typefaceIndex = a.getInt(attr, typefaceIndex);
746                break;
747
748            case com.android.internal.R.styleable.TextView_textStyle:
749                styleIndex = a.getInt(attr, styleIndex);
750                break;
751
752            case com.android.internal.R.styleable.TextView_password:
753                password = a.getBoolean(attr, password);
754                break;
755
756            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
757                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
758                break;
759
760            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
761                mSpacingMult = a.getFloat(attr, mSpacingMult);
762                break;
763
764            case com.android.internal.R.styleable.TextView_inputType:
765                inputType = a.getInt(attr, mInputType);
766                break;
767
768            case com.android.internal.R.styleable.TextView_imeOptions:
769                if (mInputContentType == null) {
770                    mInputContentType = new InputContentType();
771                }
772                mInputContentType.imeOptions = a.getInt(attr,
773                        mInputContentType.imeOptions);
774                break;
775
776            case com.android.internal.R.styleable.TextView_imeActionLabel:
777                if (mInputContentType == null) {
778                    mInputContentType = new InputContentType();
779                }
780                mInputContentType.imeActionLabel = a.getText(attr);
781                break;
782
783            case com.android.internal.R.styleable.TextView_imeActionId:
784                if (mInputContentType == null) {
785                    mInputContentType = new InputContentType();
786                }
787                mInputContentType.imeActionId = a.getInt(attr,
788                        mInputContentType.imeActionId);
789                break;
790
791            case com.android.internal.R.styleable.TextView_privateImeOptions:
792                setPrivateImeOptions(a.getString(attr));
793                break;
794
795            case com.android.internal.R.styleable.TextView_editorExtras:
796                try {
797                    setInputExtras(a.getResourceId(attr, 0));
798                } catch (XmlPullParserException e) {
799                    Log.w(LOG_TAG, "Failure reading input extras", e);
800                } catch (IOException e) {
801                    Log.w(LOG_TAG, "Failure reading input extras", e);
802                }
803                break;
804
805            case com.android.internal.R.styleable.TextView_textCursorDrawable:
806                mCursorDrawableRes = a.getResourceId(attr, 0);
807                break;
808
809            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
810                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
811                break;
812
813            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
814                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
815                break;
816
817            case com.android.internal.R.styleable.TextView_textSelectHandle:
818                mTextSelectHandleRes = a.getResourceId(attr, 0);
819                break;
820
821            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
822                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
823                break;
824
825            case com.android.internal.R.styleable.TextView_textIsSelectable:
826                mTextIsSelectable = a.getBoolean(attr, false);
827                break;
828
829            case com.android.internal.R.styleable.TextView_suggestionsEnabled:
830                mSuggestionsEnabled = a.getBoolean(attr, true);
831                break;
832
833            case com.android.internal.R.styleable.TextView_textAllCaps:
834                allCaps = a.getBoolean(attr, false);
835                break;
836            }
837        }
838        a.recycle();
839
840        BufferType bufferType = BufferType.EDITABLE;
841
842        final int variation =
843                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
844        final boolean passwordInputType = variation
845                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
846        final boolean webPasswordInputType = variation
847                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
848        final boolean numberPasswordInputType = variation
849                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
850
851        if (inputMethod != null) {
852            Class<?> c;
853
854            try {
855                c = Class.forName(inputMethod.toString());
856            } catch (ClassNotFoundException ex) {
857                throw new RuntimeException(ex);
858            }
859
860            try {
861                mInput = (KeyListener) c.newInstance();
862            } catch (InstantiationException ex) {
863                throw new RuntimeException(ex);
864            } catch (IllegalAccessException ex) {
865                throw new RuntimeException(ex);
866            }
867            try {
868                mInputType = inputType != EditorInfo.TYPE_NULL
869                        ? inputType
870                        : mInput.getInputType();
871            } catch (IncompatibleClassChangeError e) {
872                mInputType = EditorInfo.TYPE_CLASS_TEXT;
873            }
874        } else if (digits != null) {
875            mInput = DigitsKeyListener.getInstance(digits.toString());
876            // If no input type was specified, we will default to generic
877            // text, since we can't tell the IME about the set of digits
878            // that was selected.
879            mInputType = inputType != EditorInfo.TYPE_NULL
880                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
881        } else if (inputType != EditorInfo.TYPE_NULL) {
882            setInputType(inputType, true);
883            // If set, the input type overrides what was set using the deprecated singleLine flag.
884            singleLine = !isMultilineInputType(inputType);
885        } else if (phone) {
886            mInput = DialerKeyListener.getInstance();
887            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
888        } else if (numeric != 0) {
889            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
890                                                   (numeric & DECIMAL) != 0);
891            inputType = EditorInfo.TYPE_CLASS_NUMBER;
892            if ((numeric & SIGNED) != 0) {
893                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
894            }
895            if ((numeric & DECIMAL) != 0) {
896                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
897            }
898            mInputType = inputType;
899        } else if (autotext || autocap != -1) {
900            TextKeyListener.Capitalize cap;
901
902            inputType = EditorInfo.TYPE_CLASS_TEXT;
903
904            switch (autocap) {
905            case 1:
906                cap = TextKeyListener.Capitalize.SENTENCES;
907                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
908                break;
909
910            case 2:
911                cap = TextKeyListener.Capitalize.WORDS;
912                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
913                break;
914
915            case 3:
916                cap = TextKeyListener.Capitalize.CHARACTERS;
917                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
918                break;
919
920            default:
921                cap = TextKeyListener.Capitalize.NONE;
922                break;
923            }
924
925            mInput = TextKeyListener.getInstance(autotext, cap);
926            mInputType = inputType;
927        } else if (mTextIsSelectable) {
928            // Prevent text changes from keyboard.
929            mInputType = EditorInfo.TYPE_NULL;
930            mInput = null;
931            bufferType = BufferType.SPANNABLE;
932            // Required to request focus while in touch mode.
933            setFocusableInTouchMode(true);
934            // So that selection can be changed using arrow keys and touch is handled.
935            setMovementMethod(ArrowKeyMovementMethod.getInstance());
936        } else if (editable) {
937            mInput = TextKeyListener.getInstance();
938            mInputType = EditorInfo.TYPE_CLASS_TEXT;
939        } else {
940            mInput = null;
941
942            switch (buffertype) {
943                case 0:
944                    bufferType = BufferType.NORMAL;
945                    break;
946                case 1:
947                    bufferType = BufferType.SPANNABLE;
948                    break;
949                case 2:
950                    bufferType = BufferType.EDITABLE;
951                    break;
952            }
953        }
954
955        // mInputType has been set from inputType, possibly modified by mInputMethod.
956        // Specialize mInputType to [web]password if we have a text class and the original input
957        // type was a password.
958        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
959            if (password || passwordInputType) {
960                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
961                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
962            }
963            if (webPasswordInputType) {
964                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
965                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
966            }
967        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
968            if (numberPasswordInputType) {
969                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
970                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
971            }
972        }
973
974        if (selectallonfocus) {
975            mSelectAllOnFocus = true;
976
977            if (bufferType == BufferType.NORMAL)
978                bufferType = BufferType.SPANNABLE;
979        }
980
981        setCompoundDrawablesWithIntrinsicBounds(
982            drawableLeft, drawableTop, drawableRight, drawableBottom);
983        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
984        setCompoundDrawablePadding(drawablePadding);
985
986        // Same as setSingleLine(), but make sure the transformation method and the maximum number
987        // of lines of height are unchanged for multi-line TextViews.
988        setInputTypeSingleLine(singleLine);
989        applySingleLine(singleLine, singleLine, singleLine);
990
991        if (singleLine && mInput == null && ellipsize < 0) {
992                ellipsize = 3; // END
993        }
994
995        switch (ellipsize) {
996            case 1:
997                setEllipsize(TextUtils.TruncateAt.START);
998                break;
999            case 2:
1000                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1001                break;
1002            case 3:
1003                setEllipsize(TextUtils.TruncateAt.END);
1004                break;
1005            case 4:
1006                setHorizontalFadingEdgeEnabled(
1007                        ViewConfiguration.get(context).isFadingMarqueeEnabled());
1008                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1009                break;
1010        }
1011
1012        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1013        setHintTextColor(textColorHint);
1014        setLinkTextColor(textColorLink);
1015        if (textColorHighlight != 0) {
1016            setHighlightColor(textColorHighlight);
1017        }
1018        setRawTextSize(textSize);
1019
1020        if (allCaps) {
1021            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1022        }
1023
1024        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1025            setTransformationMethod(PasswordTransformationMethod.getInstance());
1026            typefaceIndex = MONOSPACE;
1027        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1028                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1029            typefaceIndex = MONOSPACE;
1030        }
1031
1032        setTypefaceByIndex(typefaceIndex, styleIndex);
1033
1034        if (shadowcolor != 0) {
1035            setShadowLayer(r, dx, dy, shadowcolor);
1036        }
1037
1038        if (maxlength >= 0) {
1039            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1040        } else {
1041            setFilters(NO_FILTERS);
1042        }
1043
1044        setText(text, bufferType);
1045        if (hint != null) setHint(hint);
1046
1047        /*
1048         * Views are not normally focusable unless specified to be.
1049         * However, TextViews that have input or movement methods *are*
1050         * focusable by default.
1051         */
1052        a = context.obtainStyledAttributes(attrs,
1053                                           com.android.internal.R.styleable.View,
1054                                           defStyle, 0);
1055
1056        boolean focusable = mMovement != null || mInput != null;
1057        boolean clickable = focusable;
1058        boolean longClickable = focusable;
1059
1060        n = a.getIndexCount();
1061        for (int i = 0; i < n; i++) {
1062            int attr = a.getIndex(i);
1063
1064            switch (attr) {
1065            case com.android.internal.R.styleable.View_focusable:
1066                focusable = a.getBoolean(attr, focusable);
1067                break;
1068
1069            case com.android.internal.R.styleable.View_clickable:
1070                clickable = a.getBoolean(attr, clickable);
1071                break;
1072
1073            case com.android.internal.R.styleable.View_longClickable:
1074                longClickable = a.getBoolean(attr, longClickable);
1075                break;
1076            }
1077        }
1078        a.recycle();
1079
1080        setFocusable(focusable);
1081        setClickable(clickable);
1082        setLongClickable(longClickable);
1083
1084        prepareCursorControllers();
1085
1086        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1087        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1088        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1089    }
1090
1091    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1092        Typeface tf = null;
1093        switch (typefaceIndex) {
1094            case SANS:
1095                tf = Typeface.SANS_SERIF;
1096                break;
1097
1098            case SERIF:
1099                tf = Typeface.SERIF;
1100                break;
1101
1102            case MONOSPACE:
1103                tf = Typeface.MONOSPACE;
1104                break;
1105        }
1106
1107        setTypeface(tf, styleIndex);
1108    }
1109
1110    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1111        boolean hasRelativeDrawables = (start != null) || (end != null);
1112        if (hasRelativeDrawables) {
1113            Drawables dr = mDrawables;
1114            if (dr == null) {
1115                mDrawables = dr = new Drawables();
1116            }
1117            final Rect compoundRect = dr.mCompoundRect;
1118            int[] state = getDrawableState();
1119            if (start != null) {
1120                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1121                start.setState(state);
1122                start.copyBounds(compoundRect);
1123                start.setCallback(this);
1124
1125                dr.mDrawableStart = start;
1126                dr.mDrawableSizeStart = compoundRect.width();
1127                dr.mDrawableHeightStart = compoundRect.height();
1128            } else {
1129                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1130            }
1131            if (end != null) {
1132                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1133                end.setState(state);
1134                end.copyBounds(compoundRect);
1135                end.setCallback(this);
1136
1137                dr.mDrawableEnd = end;
1138                dr.mDrawableSizeEnd = compoundRect.width();
1139                dr.mDrawableHeightEnd = compoundRect.height();
1140            } else {
1141                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1142            }
1143        }
1144    }
1145
1146    @Override
1147    public void setEnabled(boolean enabled) {
1148        if (enabled == isEnabled()) {
1149            return;
1150        }
1151
1152        if (!enabled) {
1153            // Hide the soft input if the currently active TextView is disabled
1154            InputMethodManager imm = InputMethodManager.peekInstance();
1155            if (imm != null && imm.isActive(this)) {
1156                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1157            }
1158        }
1159        super.setEnabled(enabled);
1160        prepareCursorControllers();
1161    }
1162
1163    /**
1164     * Sets the typeface and style in which the text should be displayed,
1165     * and turns on the fake bold and italic bits in the Paint if the
1166     * Typeface that you provided does not have all the bits in the
1167     * style that you specified.
1168     *
1169     * @attr ref android.R.styleable#TextView_typeface
1170     * @attr ref android.R.styleable#TextView_textStyle
1171     */
1172    public void setTypeface(Typeface tf, int style) {
1173        if (style > 0) {
1174            if (tf == null) {
1175                tf = Typeface.defaultFromStyle(style);
1176            } else {
1177                tf = Typeface.create(tf, style);
1178            }
1179
1180            setTypeface(tf);
1181            // now compute what (if any) algorithmic styling is needed
1182            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1183            int need = style & ~typefaceStyle;
1184            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1185            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1186        } else {
1187            mTextPaint.setFakeBoldText(false);
1188            mTextPaint.setTextSkewX(0);
1189            setTypeface(tf);
1190        }
1191    }
1192
1193    /**
1194     * Subclasses override this to specify that they have a KeyListener
1195     * by default even if not specifically called for in the XML options.
1196     */
1197    protected boolean getDefaultEditable() {
1198        return false;
1199    }
1200
1201    /**
1202     * Subclasses override this to specify a default movement method.
1203     */
1204    protected MovementMethod getDefaultMovementMethod() {
1205        return null;
1206    }
1207
1208    /**
1209     * Return the text the TextView is displaying. If setText() was called with
1210     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1211     * the return value from this method to Spannable or Editable, respectively.
1212     *
1213     * Note: The content of the return value should not be modified. If you want
1214     * a modifiable one, you should make your own copy first.
1215     */
1216    @ViewDebug.CapturedViewProperty
1217    public CharSequence getText() {
1218        return mText;
1219    }
1220
1221    /**
1222     * Returns the length, in characters, of the text managed by this TextView
1223     */
1224    public int length() {
1225        return mText.length();
1226    }
1227
1228    /**
1229     * Return the text the TextView is displaying as an Editable object.  If
1230     * the text is not editable, null is returned.
1231     *
1232     * @see #getText
1233     */
1234    public Editable getEditableText() {
1235        return (mText instanceof Editable) ? (Editable)mText : null;
1236    }
1237
1238    /**
1239     * @return the height of one standard line in pixels.  Note that markup
1240     * within the text can cause individual lines to be taller or shorter
1241     * than this height, and the layout may contain additional first-
1242     * or last-line padding.
1243     */
1244    public int getLineHeight() {
1245        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1246    }
1247
1248    /**
1249     * @return the Layout that is currently being used to display the text.
1250     * This can be null if the text or width has recently changes.
1251     */
1252    public final Layout getLayout() {
1253        return mLayout;
1254    }
1255
1256    /**
1257     * @return the current key listener for this TextView.
1258     * This will frequently be null for non-EditText TextViews.
1259     */
1260    public final KeyListener getKeyListener() {
1261        return mInput;
1262    }
1263
1264    /**
1265     * Sets the key listener to be used with this TextView.  This can be null
1266     * to disallow user input.  Note that this method has significant and
1267     * subtle interactions with soft keyboards and other input method:
1268     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1269     * for important details.  Calling this method will replace the current
1270     * content type of the text view with the content type returned by the
1271     * key listener.
1272     * <p>
1273     * Be warned that if you want a TextView with a key listener or movement
1274     * method not to be focusable, or if you want a TextView without a
1275     * key listener or movement method to be focusable, you must call
1276     * {@link #setFocusable} again after calling this to get the focusability
1277     * back the way you want it.
1278     *
1279     * @attr ref android.R.styleable#TextView_numeric
1280     * @attr ref android.R.styleable#TextView_digits
1281     * @attr ref android.R.styleable#TextView_phoneNumber
1282     * @attr ref android.R.styleable#TextView_inputMethod
1283     * @attr ref android.R.styleable#TextView_capitalize
1284     * @attr ref android.R.styleable#TextView_autoText
1285     */
1286    public void setKeyListener(KeyListener input) {
1287        setKeyListenerOnly(input);
1288        fixFocusableAndClickableSettings();
1289
1290        if (input != null) {
1291            try {
1292                mInputType = mInput.getInputType();
1293            } catch (IncompatibleClassChangeError e) {
1294                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1295            }
1296            // Change inputType, without affecting transformation.
1297            // No need to applySingleLine since mSingleLine is unchanged.
1298            setInputTypeSingleLine(mSingleLine);
1299        } else {
1300            mInputType = EditorInfo.TYPE_NULL;
1301        }
1302
1303        InputMethodManager imm = InputMethodManager.peekInstance();
1304        if (imm != null) imm.restartInput(this);
1305    }
1306
1307    private void setKeyListenerOnly(KeyListener input) {
1308        mInput = input;
1309        if (mInput != null && !(mText instanceof Editable))
1310            setText(mText);
1311
1312        setFilters((Editable) mText, mFilters);
1313    }
1314
1315    /**
1316     * @return the movement method being used for this TextView.
1317     * This will frequently be null for non-EditText TextViews.
1318     */
1319    public final MovementMethod getMovementMethod() {
1320        return mMovement;
1321    }
1322
1323    /**
1324     * Sets the movement method (arrow key handler) to be used for
1325     * this TextView.  This can be null to disallow using the arrow keys
1326     * to move the cursor or scroll the view.
1327     * <p>
1328     * Be warned that if you want a TextView with a key listener or movement
1329     * method not to be focusable, or if you want a TextView without a
1330     * key listener or movement method to be focusable, you must call
1331     * {@link #setFocusable} again after calling this to get the focusability
1332     * back the way you want it.
1333     */
1334    public final void setMovementMethod(MovementMethod movement) {
1335        mMovement = movement;
1336
1337        if (mMovement != null && !(mText instanceof Spannable))
1338            setText(mText);
1339
1340        fixFocusableAndClickableSettings();
1341
1342        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1343        prepareCursorControllers();
1344    }
1345
1346    private void fixFocusableAndClickableSettings() {
1347        if ((mMovement != null) || mInput != null) {
1348            setFocusable(true);
1349            setClickable(true);
1350            setLongClickable(true);
1351        } else {
1352            setFocusable(false);
1353            setClickable(false);
1354            setLongClickable(false);
1355        }
1356    }
1357
1358    /**
1359     * @return the current transformation method for this TextView.
1360     * This will frequently be null except for single-line and password
1361     * fields.
1362     */
1363    public final TransformationMethod getTransformationMethod() {
1364        return mTransformation;
1365    }
1366
1367    /**
1368     * Sets the transformation that is applied to the text that this
1369     * TextView is displaying.
1370     *
1371     * @attr ref android.R.styleable#TextView_password
1372     * @attr ref android.R.styleable#TextView_singleLine
1373     */
1374    public final void setTransformationMethod(TransformationMethod method) {
1375        if (method == mTransformation) {
1376            // Avoid the setText() below if the transformation is
1377            // the same.
1378            return;
1379        }
1380        if (mTransformation != null) {
1381            if (mText instanceof Spannable) {
1382                ((Spannable) mText).removeSpan(mTransformation);
1383            }
1384        }
1385
1386        mTransformation = method;
1387
1388        if (method instanceof TransformationMethod2) {
1389            TransformationMethod2 method2 = (TransformationMethod2) method;
1390            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1391            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1392        } else {
1393            mAllowTransformationLengthChange = false;
1394        }
1395
1396        setText(mText);
1397    }
1398
1399    /**
1400     * Returns the top padding of the view, plus space for the top
1401     * Drawable if any.
1402     */
1403    public int getCompoundPaddingTop() {
1404        final Drawables dr = mDrawables;
1405        if (dr == null || dr.mDrawableTop == null) {
1406            return mPaddingTop;
1407        } else {
1408            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1409        }
1410    }
1411
1412    /**
1413     * Returns the bottom padding of the view, plus space for the bottom
1414     * Drawable if any.
1415     */
1416    public int getCompoundPaddingBottom() {
1417        final Drawables dr = mDrawables;
1418        if (dr == null || dr.mDrawableBottom == null) {
1419            return mPaddingBottom;
1420        } else {
1421            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1422        }
1423    }
1424
1425    /**
1426     * Returns the left padding of the view, plus space for the left
1427     * Drawable if any.
1428     */
1429    public int getCompoundPaddingLeft() {
1430        final Drawables dr = mDrawables;
1431        if (dr == null || dr.mDrawableLeft == null) {
1432            return mPaddingLeft;
1433        } else {
1434            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1435        }
1436    }
1437
1438    /**
1439     * Returns the right padding of the view, plus space for the right
1440     * Drawable if any.
1441     */
1442    public int getCompoundPaddingRight() {
1443        final Drawables dr = mDrawables;
1444        if (dr == null || dr.mDrawableRight == null) {
1445            return mPaddingRight;
1446        } else {
1447            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1448        }
1449    }
1450
1451    /**
1452     * Returns the start padding of the view, plus space for the start
1453     * Drawable if any.
1454     *
1455     * @hide
1456     */
1457    public int getCompoundPaddingStart() {
1458        resolveDrawables();
1459        switch(getResolvedLayoutDirection()) {
1460            default:
1461            case LAYOUT_DIRECTION_LTR:
1462                return getCompoundPaddingLeft();
1463            case LAYOUT_DIRECTION_RTL:
1464                return getCompoundPaddingRight();
1465        }
1466    }
1467
1468    /**
1469     * Returns the end padding of the view, plus space for the end
1470     * Drawable if any.
1471     *
1472     * @hide
1473     */
1474    public int getCompoundPaddingEnd() {
1475        resolveDrawables();
1476        switch(getResolvedLayoutDirection()) {
1477            default:
1478            case LAYOUT_DIRECTION_LTR:
1479                return getCompoundPaddingRight();
1480            case LAYOUT_DIRECTION_RTL:
1481                return getCompoundPaddingLeft();
1482        }
1483    }
1484
1485    /**
1486     * Returns the extended top padding of the view, including both the
1487     * top Drawable if any and any extra space to keep more than maxLines
1488     * of text from showing.  It is only valid to call this after measuring.
1489     */
1490    public int getExtendedPaddingTop() {
1491        if (mMaxMode != LINES) {
1492            return getCompoundPaddingTop();
1493        }
1494
1495        if (mLayout.getLineCount() <= mMaximum) {
1496            return getCompoundPaddingTop();
1497        }
1498
1499        int top = getCompoundPaddingTop();
1500        int bottom = getCompoundPaddingBottom();
1501        int viewht = getHeight() - top - bottom;
1502        int layoutht = mLayout.getLineTop(mMaximum);
1503
1504        if (layoutht >= viewht) {
1505            return top;
1506        }
1507
1508        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1509        if (gravity == Gravity.TOP) {
1510            return top;
1511        } else if (gravity == Gravity.BOTTOM) {
1512            return top + viewht - layoutht;
1513        } else { // (gravity == Gravity.CENTER_VERTICAL)
1514            return top + (viewht - layoutht) / 2;
1515        }
1516    }
1517
1518    /**
1519     * Returns the extended bottom padding of the view, including both the
1520     * bottom Drawable if any and any extra space to keep more than maxLines
1521     * of text from showing.  It is only valid to call this after measuring.
1522     */
1523    public int getExtendedPaddingBottom() {
1524        if (mMaxMode != LINES) {
1525            return getCompoundPaddingBottom();
1526        }
1527
1528        if (mLayout.getLineCount() <= mMaximum) {
1529            return getCompoundPaddingBottom();
1530        }
1531
1532        int top = getCompoundPaddingTop();
1533        int bottom = getCompoundPaddingBottom();
1534        int viewht = getHeight() - top - bottom;
1535        int layoutht = mLayout.getLineTop(mMaximum);
1536
1537        if (layoutht >= viewht) {
1538            return bottom;
1539        }
1540
1541        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1542        if (gravity == Gravity.TOP) {
1543            return bottom + viewht - layoutht;
1544        } else if (gravity == Gravity.BOTTOM) {
1545            return bottom;
1546        } else { // (gravity == Gravity.CENTER_VERTICAL)
1547            return bottom + (viewht - layoutht) / 2;
1548        }
1549    }
1550
1551    /**
1552     * Returns the total left padding of the view, including the left
1553     * Drawable if any.
1554     */
1555    public int getTotalPaddingLeft() {
1556        return getCompoundPaddingLeft();
1557    }
1558
1559    /**
1560     * Returns the total right padding of the view, including the right
1561     * Drawable if any.
1562     */
1563    public int getTotalPaddingRight() {
1564        return getCompoundPaddingRight();
1565    }
1566
1567    /**
1568     * Returns the total start padding of the view, including the start
1569     * Drawable if any.
1570     *
1571     * @hide
1572     */
1573    public int getTotalPaddingStart() {
1574        return getCompoundPaddingStart();
1575    }
1576
1577    /**
1578     * Returns the total end padding of the view, including the end
1579     * Drawable if any.
1580     *
1581     * @hide
1582     */
1583    public int getTotalPaddingEnd() {
1584        return getCompoundPaddingEnd();
1585    }
1586
1587    /**
1588     * Returns the total top padding of the view, including the top
1589     * Drawable if any, the extra space to keep more than maxLines
1590     * from showing, and the vertical offset for gravity, if any.
1591     */
1592    public int getTotalPaddingTop() {
1593        return getExtendedPaddingTop() + getVerticalOffset(true);
1594    }
1595
1596    /**
1597     * Returns the total bottom padding of the view, including the bottom
1598     * Drawable if any, the extra space to keep more than maxLines
1599     * from showing, and the vertical offset for gravity, if any.
1600     */
1601    public int getTotalPaddingBottom() {
1602        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1603    }
1604
1605    /**
1606     * Sets the Drawables (if any) to appear to the left of, above,
1607     * to the right of, and below the text.  Use null if you do not
1608     * want a Drawable there.  The Drawables must already have had
1609     * {@link Drawable#setBounds} called.
1610     *
1611     * @attr ref android.R.styleable#TextView_drawableLeft
1612     * @attr ref android.R.styleable#TextView_drawableTop
1613     * @attr ref android.R.styleable#TextView_drawableRight
1614     * @attr ref android.R.styleable#TextView_drawableBottom
1615     */
1616    public void setCompoundDrawables(Drawable left, Drawable top,
1617                                     Drawable right, Drawable bottom) {
1618        Drawables dr = mDrawables;
1619
1620        final boolean drawables = left != null || top != null
1621                || right != null || bottom != null;
1622
1623        if (!drawables) {
1624            // Clearing drawables...  can we free the data structure?
1625            if (dr != null) {
1626                if (dr.mDrawablePadding == 0) {
1627                    mDrawables = null;
1628                } else {
1629                    // We need to retain the last set padding, so just clear
1630                    // out all of the fields in the existing structure.
1631                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1632                    dr.mDrawableLeft = null;
1633                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1634                    dr.mDrawableTop = null;
1635                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1636                    dr.mDrawableRight = null;
1637                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1638                    dr.mDrawableBottom = null;
1639                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1640                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1641                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1642                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1643                }
1644            }
1645        } else {
1646            if (dr == null) {
1647                mDrawables = dr = new Drawables();
1648            }
1649
1650            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1651                dr.mDrawableLeft.setCallback(null);
1652            }
1653            dr.mDrawableLeft = left;
1654
1655            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1656                dr.mDrawableTop.setCallback(null);
1657            }
1658            dr.mDrawableTop = top;
1659
1660            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1661                dr.mDrawableRight.setCallback(null);
1662            }
1663            dr.mDrawableRight = right;
1664
1665            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1666                dr.mDrawableBottom.setCallback(null);
1667            }
1668            dr.mDrawableBottom = bottom;
1669
1670            final Rect compoundRect = dr.mCompoundRect;
1671            int[] state;
1672
1673            state = getDrawableState();
1674
1675            if (left != null) {
1676                left.setState(state);
1677                left.copyBounds(compoundRect);
1678                left.setCallback(this);
1679                dr.mDrawableSizeLeft = compoundRect.width();
1680                dr.mDrawableHeightLeft = compoundRect.height();
1681            } else {
1682                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1683            }
1684
1685            if (right != null) {
1686                right.setState(state);
1687                right.copyBounds(compoundRect);
1688                right.setCallback(this);
1689                dr.mDrawableSizeRight = compoundRect.width();
1690                dr.mDrawableHeightRight = compoundRect.height();
1691            } else {
1692                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1693            }
1694
1695            if (top != null) {
1696                top.setState(state);
1697                top.copyBounds(compoundRect);
1698                top.setCallback(this);
1699                dr.mDrawableSizeTop = compoundRect.height();
1700                dr.mDrawableWidthTop = compoundRect.width();
1701            } else {
1702                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1703            }
1704
1705            if (bottom != null) {
1706                bottom.setState(state);
1707                bottom.copyBounds(compoundRect);
1708                bottom.setCallback(this);
1709                dr.mDrawableSizeBottom = compoundRect.height();
1710                dr.mDrawableWidthBottom = compoundRect.width();
1711            } else {
1712                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1713            }
1714        }
1715
1716        invalidate();
1717        requestLayout();
1718    }
1719
1720    /**
1721     * Sets the Drawables (if any) to appear to the left of, above,
1722     * to the right of, and below the text.  Use 0 if you do not
1723     * want a Drawable there. The Drawables' bounds will be set to
1724     * their intrinsic bounds.
1725     *
1726     * @param left Resource identifier of the left Drawable.
1727     * @param top Resource identifier of the top Drawable.
1728     * @param right Resource identifier of the right Drawable.
1729     * @param bottom Resource identifier of the bottom Drawable.
1730     *
1731     * @attr ref android.R.styleable#TextView_drawableLeft
1732     * @attr ref android.R.styleable#TextView_drawableTop
1733     * @attr ref android.R.styleable#TextView_drawableRight
1734     * @attr ref android.R.styleable#TextView_drawableBottom
1735     */
1736    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1737        final Resources resources = getContext().getResources();
1738        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1739                top != 0 ? resources.getDrawable(top) : null,
1740                right != 0 ? resources.getDrawable(right) : null,
1741                bottom != 0 ? resources.getDrawable(bottom) : null);
1742    }
1743
1744    /**
1745     * Sets the Drawables (if any) to appear to the left of, above,
1746     * to the right of, and below the text.  Use null if you do not
1747     * want a Drawable there. The Drawables' bounds will be set to
1748     * their intrinsic bounds.
1749     *
1750     * @attr ref android.R.styleable#TextView_drawableLeft
1751     * @attr ref android.R.styleable#TextView_drawableTop
1752     * @attr ref android.R.styleable#TextView_drawableRight
1753     * @attr ref android.R.styleable#TextView_drawableBottom
1754     */
1755    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1756            Drawable right, Drawable bottom) {
1757
1758        if (left != null) {
1759            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1760        }
1761        if (right != null) {
1762            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1763        }
1764        if (top != null) {
1765            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1766        }
1767        if (bottom != null) {
1768            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1769        }
1770        setCompoundDrawables(left, top, right, bottom);
1771    }
1772
1773    /**
1774     * Sets the Drawables (if any) to appear to the start of, above,
1775     * to the end of, and below the text.  Use null if you do not
1776     * want a Drawable there.  The Drawables must already have had
1777     * {@link Drawable#setBounds} called.
1778     *
1779     * @attr ref android.R.styleable#TextView_drawableStart
1780     * @attr ref android.R.styleable#TextView_drawableTop
1781     * @attr ref android.R.styleable#TextView_drawableEnd
1782     * @attr ref android.R.styleable#TextView_drawableBottom
1783     *
1784     * @hide
1785     */
1786    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1787                                     Drawable end, Drawable bottom) {
1788        Drawables dr = mDrawables;
1789
1790        final boolean drawables = start != null || top != null
1791                || end != null || bottom != null;
1792
1793        if (!drawables) {
1794            // Clearing drawables...  can we free the data structure?
1795            if (dr != null) {
1796                if (dr.mDrawablePadding == 0) {
1797                    mDrawables = null;
1798                } else {
1799                    // We need to retain the last set padding, so just clear
1800                    // out all of the fields in the existing structure.
1801                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1802                    dr.mDrawableStart = null;
1803                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1804                    dr.mDrawableTop = null;
1805                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1806                    dr.mDrawableEnd = null;
1807                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1808                    dr.mDrawableBottom = null;
1809                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1810                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1811                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1812                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1813                }
1814            }
1815        } else {
1816            if (dr == null) {
1817                mDrawables = dr = new Drawables();
1818            }
1819
1820            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1821                dr.mDrawableStart.setCallback(null);
1822            }
1823            dr.mDrawableStart = start;
1824
1825            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1826                dr.mDrawableTop.setCallback(null);
1827            }
1828            dr.mDrawableTop = top;
1829
1830            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1831                dr.mDrawableEnd.setCallback(null);
1832            }
1833            dr.mDrawableEnd = end;
1834
1835            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1836                dr.mDrawableBottom.setCallback(null);
1837            }
1838            dr.mDrawableBottom = bottom;
1839
1840            final Rect compoundRect = dr.mCompoundRect;
1841            int[] state;
1842
1843            state = getDrawableState();
1844
1845            if (start != null) {
1846                start.setState(state);
1847                start.copyBounds(compoundRect);
1848                start.setCallback(this);
1849                dr.mDrawableSizeStart = compoundRect.width();
1850                dr.mDrawableHeightStart = compoundRect.height();
1851            } else {
1852                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1853            }
1854
1855            if (end != null) {
1856                end.setState(state);
1857                end.copyBounds(compoundRect);
1858                end.setCallback(this);
1859                dr.mDrawableSizeEnd = compoundRect.width();
1860                dr.mDrawableHeightEnd = compoundRect.height();
1861            } else {
1862                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1863            }
1864
1865            if (top != null) {
1866                top.setState(state);
1867                top.copyBounds(compoundRect);
1868                top.setCallback(this);
1869                dr.mDrawableSizeTop = compoundRect.height();
1870                dr.mDrawableWidthTop = compoundRect.width();
1871            } else {
1872                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1873            }
1874
1875            if (bottom != null) {
1876                bottom.setState(state);
1877                bottom.copyBounds(compoundRect);
1878                bottom.setCallback(this);
1879                dr.mDrawableSizeBottom = compoundRect.height();
1880                dr.mDrawableWidthBottom = compoundRect.width();
1881            } else {
1882                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1883            }
1884        }
1885
1886        resolveDrawables();
1887        invalidate();
1888        requestLayout();
1889    }
1890
1891    /**
1892     * Sets the Drawables (if any) to appear to the start of, above,
1893     * to the end of, and below the text.  Use 0 if you do not
1894     * want a Drawable there. The Drawables' bounds will be set to
1895     * their intrinsic bounds.
1896     *
1897     * @param start Resource identifier of the start Drawable.
1898     * @param top Resource identifier of the top Drawable.
1899     * @param end Resource identifier of the end Drawable.
1900     * @param bottom Resource identifier of the bottom Drawable.
1901     *
1902     * @attr ref android.R.styleable#TextView_drawableStart
1903     * @attr ref android.R.styleable#TextView_drawableTop
1904     * @attr ref android.R.styleable#TextView_drawableEnd
1905     * @attr ref android.R.styleable#TextView_drawableBottom
1906     *
1907     * @hide
1908     */
1909    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1910            int bottom) {
1911        resetResolvedDrawables();
1912        final Resources resources = getContext().getResources();
1913        setCompoundDrawablesRelativeWithIntrinsicBounds(
1914                start != 0 ? resources.getDrawable(start) : null,
1915                top != 0 ? resources.getDrawable(top) : null,
1916                end != 0 ? resources.getDrawable(end) : null,
1917                bottom != 0 ? resources.getDrawable(bottom) : null);
1918    }
1919
1920    /**
1921     * Sets the Drawables (if any) to appear to the start of, above,
1922     * to the end of, and below the text.  Use null if you do not
1923     * want a Drawable there. The Drawables' bounds will be set to
1924     * their intrinsic bounds.
1925     *
1926     * @attr ref android.R.styleable#TextView_drawableStart
1927     * @attr ref android.R.styleable#TextView_drawableTop
1928     * @attr ref android.R.styleable#TextView_drawableEnd
1929     * @attr ref android.R.styleable#TextView_drawableBottom
1930     *
1931     * @hide
1932     */
1933    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1934            Drawable end, Drawable bottom) {
1935
1936        resetResolvedDrawables();
1937        if (start != null) {
1938            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1939        }
1940        if (end != null) {
1941            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1942        }
1943        if (top != null) {
1944            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1945        }
1946        if (bottom != null) {
1947            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1948        }
1949        setCompoundDrawablesRelative(start, top, end, bottom);
1950    }
1951
1952    /**
1953     * Returns drawables for the left, top, right, and bottom borders.
1954     */
1955    public Drawable[] getCompoundDrawables() {
1956        final Drawables dr = mDrawables;
1957        if (dr != null) {
1958            return new Drawable[] {
1959                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1960            };
1961        } else {
1962            return new Drawable[] { null, null, null, null };
1963        }
1964    }
1965
1966    /**
1967     * Returns drawables for the start, top, end, and bottom borders.
1968     *
1969     * @hide
1970     */
1971    public Drawable[] getCompoundDrawablesRelative() {
1972        final Drawables dr = mDrawables;
1973        if (dr != null) {
1974            return new Drawable[] {
1975                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
1976            };
1977        } else {
1978            return new Drawable[] { null, null, null, null };
1979        }
1980    }
1981
1982    /**
1983     * Sets the size of the padding between the compound drawables and
1984     * the text.
1985     *
1986     * @attr ref android.R.styleable#TextView_drawablePadding
1987     */
1988    public void setCompoundDrawablePadding(int pad) {
1989        Drawables dr = mDrawables;
1990        if (pad == 0) {
1991            if (dr != null) {
1992                dr.mDrawablePadding = pad;
1993            }
1994        } else {
1995            if (dr == null) {
1996                mDrawables = dr = new Drawables();
1997            }
1998            dr.mDrawablePadding = pad;
1999        }
2000
2001        invalidate();
2002        requestLayout();
2003    }
2004
2005    /**
2006     * Returns the padding between the compound drawables and the text.
2007     */
2008    public int getCompoundDrawablePadding() {
2009        final Drawables dr = mDrawables;
2010        return dr != null ? dr.mDrawablePadding : 0;
2011    }
2012
2013    @Override
2014    public void setPadding(int left, int top, int right, int bottom) {
2015        if (left != mPaddingLeft ||
2016            right != mPaddingRight ||
2017            top != mPaddingTop ||
2018            bottom != mPaddingBottom) {
2019            nullLayouts();
2020        }
2021
2022        // the super call will requestLayout()
2023        super.setPadding(left, top, right, bottom);
2024        invalidate();
2025    }
2026
2027    /**
2028     * Gets the autolink mask of the text.  See {@link
2029     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2030     * possible values.
2031     *
2032     * @attr ref android.R.styleable#TextView_autoLink
2033     */
2034    public final int getAutoLinkMask() {
2035        return mAutoLinkMask;
2036    }
2037
2038    /**
2039     * Sets the text color, size, style, hint color, and highlight color
2040     * from the specified TextAppearance resource.
2041     */
2042    public void setTextAppearance(Context context, int resid) {
2043        TypedArray appearance =
2044            context.obtainStyledAttributes(resid,
2045                                           com.android.internal.R.styleable.TextAppearance);
2046
2047        int color;
2048        ColorStateList colors;
2049        int ts;
2050
2051        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2052        if (color != 0) {
2053            setHighlightColor(color);
2054        }
2055
2056        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2057                                              TextAppearance_textColor);
2058        if (colors != null) {
2059            setTextColor(colors);
2060        }
2061
2062        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2063                                              TextAppearance_textSize, 0);
2064        if (ts != 0) {
2065            setRawTextSize(ts);
2066        }
2067
2068        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2069                                              TextAppearance_textColorHint);
2070        if (colors != null) {
2071            setHintTextColor(colors);
2072        }
2073
2074        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2075                                              TextAppearance_textColorLink);
2076        if (colors != null) {
2077            setLinkTextColor(colors);
2078        }
2079
2080        int typefaceIndex, styleIndex;
2081
2082        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2083                                          TextAppearance_typeface, -1);
2084        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2085                                       TextAppearance_textStyle, -1);
2086
2087        setTypefaceByIndex(typefaceIndex, styleIndex);
2088
2089        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2090                false)) {
2091            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2092        }
2093
2094        appearance.recycle();
2095    }
2096
2097    /**
2098     * @return the size (in pixels) of the default text size in this TextView.
2099     */
2100    public float getTextSize() {
2101        return mTextPaint.getTextSize();
2102    }
2103
2104    /**
2105     * Set the default text size to the given value, interpreted as "scaled
2106     * pixel" units.  This size is adjusted based on the current density and
2107     * user font size preference.
2108     *
2109     * @param size The scaled pixel size.
2110     *
2111     * @attr ref android.R.styleable#TextView_textSize
2112     */
2113    @android.view.RemotableViewMethod
2114    public void setTextSize(float size) {
2115        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2116    }
2117
2118    /**
2119     * Set the default text size to a given unit and value.  See {@link
2120     * TypedValue} for the possible dimension units.
2121     *
2122     * @param unit The desired dimension unit.
2123     * @param size The desired size in the given units.
2124     *
2125     * @attr ref android.R.styleable#TextView_textSize
2126     */
2127    public void setTextSize(int unit, float size) {
2128        Context c = getContext();
2129        Resources r;
2130
2131        if (c == null)
2132            r = Resources.getSystem();
2133        else
2134            r = c.getResources();
2135
2136        setRawTextSize(TypedValue.applyDimension(
2137            unit, size, r.getDisplayMetrics()));
2138    }
2139
2140    private void setRawTextSize(float size) {
2141        if (size != mTextPaint.getTextSize()) {
2142            mTextPaint.setTextSize(size);
2143
2144            if (mLayout != null) {
2145                nullLayouts();
2146                requestLayout();
2147                invalidate();
2148            }
2149        }
2150    }
2151
2152    /**
2153     * @return the extent by which text is currently being stretched
2154     * horizontally.  This will usually be 1.
2155     */
2156    public float getTextScaleX() {
2157        return mTextPaint.getTextScaleX();
2158    }
2159
2160    /**
2161     * Sets the extent by which text should be stretched horizontally.
2162     *
2163     * @attr ref android.R.styleable#TextView_textScaleX
2164     */
2165    @android.view.RemotableViewMethod
2166    public void setTextScaleX(float size) {
2167        if (size != mTextPaint.getTextScaleX()) {
2168            mUserSetTextScaleX = true;
2169            mTextPaint.setTextScaleX(size);
2170
2171            if (mLayout != null) {
2172                nullLayouts();
2173                requestLayout();
2174                invalidate();
2175            }
2176        }
2177    }
2178
2179    /**
2180     * Sets the typeface and style in which the text should be displayed.
2181     * Note that not all Typeface families actually have bold and italic
2182     * variants, so you may need to use
2183     * {@link #setTypeface(Typeface, int)} to get the appearance
2184     * that you actually want.
2185     *
2186     * @attr ref android.R.styleable#TextView_typeface
2187     * @attr ref android.R.styleable#TextView_textStyle
2188     */
2189    public void setTypeface(Typeface tf) {
2190        if (mTextPaint.getTypeface() != tf) {
2191            mTextPaint.setTypeface(tf);
2192
2193            if (mLayout != null) {
2194                nullLayouts();
2195                requestLayout();
2196                invalidate();
2197            }
2198        }
2199    }
2200
2201    /**
2202     * @return the current typeface and style in which the text is being
2203     * displayed.
2204     */
2205    public Typeface getTypeface() {
2206        return mTextPaint.getTypeface();
2207    }
2208
2209    /**
2210     * Sets the text color for all the states (normal, selected,
2211     * focused) to be this color.
2212     *
2213     * @attr ref android.R.styleable#TextView_textColor
2214     */
2215    @android.view.RemotableViewMethod
2216    public void setTextColor(int color) {
2217        mTextColor = ColorStateList.valueOf(color);
2218        updateTextColors();
2219    }
2220
2221    /**
2222     * Sets the text color.
2223     *
2224     * @attr ref android.R.styleable#TextView_textColor
2225     */
2226    public void setTextColor(ColorStateList colors) {
2227        if (colors == null) {
2228            throw new NullPointerException();
2229        }
2230
2231        mTextColor = colors;
2232        updateTextColors();
2233    }
2234
2235    /**
2236     * Return the set of text colors.
2237     *
2238     * @return Returns the set of text colors.
2239     */
2240    public final ColorStateList getTextColors() {
2241        return mTextColor;
2242    }
2243
2244    /**
2245     * <p>Return the current color selected for normal text.</p>
2246     *
2247     * @return Returns the current text color.
2248     */
2249    public final int getCurrentTextColor() {
2250        return mCurTextColor;
2251    }
2252
2253    /**
2254     * Sets the color used to display the selection highlight.
2255     *
2256     * @attr ref android.R.styleable#TextView_textColorHighlight
2257     */
2258    @android.view.RemotableViewMethod
2259    public void setHighlightColor(int color) {
2260        if (mHighlightColor != color) {
2261            mHighlightColor = color;
2262            invalidate();
2263        }
2264    }
2265
2266    /**
2267     * Gives the text a shadow of the specified radius and color, the specified
2268     * distance from its normal position.
2269     *
2270     * @attr ref android.R.styleable#TextView_shadowColor
2271     * @attr ref android.R.styleable#TextView_shadowDx
2272     * @attr ref android.R.styleable#TextView_shadowDy
2273     * @attr ref android.R.styleable#TextView_shadowRadius
2274     */
2275    public void setShadowLayer(float radius, float dx, float dy, int color) {
2276        mTextPaint.setShadowLayer(radius, dx, dy, color);
2277
2278        mShadowRadius = radius;
2279        mShadowDx = dx;
2280        mShadowDy = dy;
2281
2282        invalidate();
2283    }
2284
2285    /**
2286     * @return the base paint used for the text.  Please use this only to
2287     * consult the Paint's properties and not to change them.
2288     */
2289    public TextPaint getPaint() {
2290        return mTextPaint;
2291    }
2292
2293    /**
2294     * Sets the autolink mask of the text.  See {@link
2295     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2296     * possible values.
2297     *
2298     * @attr ref android.R.styleable#TextView_autoLink
2299     */
2300    @android.view.RemotableViewMethod
2301    public final void setAutoLinkMask(int mask) {
2302        mAutoLinkMask = mask;
2303    }
2304
2305    /**
2306     * Sets whether the movement method will automatically be set to
2307     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2308     * set to nonzero and links are detected in {@link #setText}.
2309     * The default is true.
2310     *
2311     * @attr ref android.R.styleable#TextView_linksClickable
2312     */
2313    @android.view.RemotableViewMethod
2314    public final void setLinksClickable(boolean whether) {
2315        mLinksClickable = whether;
2316    }
2317
2318    /**
2319     * Returns whether the movement method will automatically be set to
2320     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2321     * set to nonzero and links are detected in {@link #setText}.
2322     * The default is true.
2323     *
2324     * @attr ref android.R.styleable#TextView_linksClickable
2325     */
2326    public final boolean getLinksClickable() {
2327        return mLinksClickable;
2328    }
2329
2330    /**
2331     * Returns the list of URLSpans attached to the text
2332     * (by {@link Linkify} or otherwise) if any.  You can call
2333     * {@link URLSpan#getURL} on them to find where they link to
2334     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2335     * to find the region of the text they are attached to.
2336     */
2337    public URLSpan[] getUrls() {
2338        if (mText instanceof Spanned) {
2339            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2340        } else {
2341            return new URLSpan[0];
2342        }
2343    }
2344
2345    /**
2346     * Sets the color of the hint text.
2347     *
2348     * @attr ref android.R.styleable#TextView_textColorHint
2349     */
2350    @android.view.RemotableViewMethod
2351    public final void setHintTextColor(int color) {
2352        mHintTextColor = ColorStateList.valueOf(color);
2353        updateTextColors();
2354    }
2355
2356    /**
2357     * Sets the color of the hint text.
2358     *
2359     * @attr ref android.R.styleable#TextView_textColorHint
2360     */
2361    public final void setHintTextColor(ColorStateList colors) {
2362        mHintTextColor = colors;
2363        updateTextColors();
2364    }
2365
2366    /**
2367     * <p>Return the color used to paint the hint text.</p>
2368     *
2369     * @return Returns the list of hint text colors.
2370     */
2371    public final ColorStateList getHintTextColors() {
2372        return mHintTextColor;
2373    }
2374
2375    /**
2376     * <p>Return the current color selected to paint the hint text.</p>
2377     *
2378     * @return Returns the current hint text color.
2379     */
2380    public final int getCurrentHintTextColor() {
2381        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2382    }
2383
2384    /**
2385     * Sets the color of links in the text.
2386     *
2387     * @attr ref android.R.styleable#TextView_textColorLink
2388     */
2389    @android.view.RemotableViewMethod
2390    public final void setLinkTextColor(int color) {
2391        mLinkTextColor = ColorStateList.valueOf(color);
2392        updateTextColors();
2393    }
2394
2395    /**
2396     * Sets the color of links in the text.
2397     *
2398     * @attr ref android.R.styleable#TextView_textColorLink
2399     */
2400    public final void setLinkTextColor(ColorStateList colors) {
2401        mLinkTextColor = colors;
2402        updateTextColors();
2403    }
2404
2405    /**
2406     * <p>Returns the color used to paint links in the text.</p>
2407     *
2408     * @return Returns the list of link text colors.
2409     */
2410    public final ColorStateList getLinkTextColors() {
2411        return mLinkTextColor;
2412    }
2413
2414    /**
2415     * Sets the horizontal alignment of the text and the
2416     * vertical gravity that will be used when there is extra space
2417     * in the TextView beyond what is required for the text itself.
2418     *
2419     * @see android.view.Gravity
2420     * @attr ref android.R.styleable#TextView_gravity
2421     */
2422    public void setGravity(int gravity) {
2423        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2424            gravity |= Gravity.START;
2425        }
2426        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2427            gravity |= Gravity.TOP;
2428        }
2429
2430        boolean newLayout = false;
2431
2432        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2433            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2434            newLayout = true;
2435        }
2436
2437        if (gravity != mGravity) {
2438            invalidate();
2439        }
2440
2441        mGravity = gravity;
2442
2443        if (mLayout != null && newLayout) {
2444            // XXX this is heavy-handed because no actual content changes.
2445            int want = mLayout.getWidth();
2446            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2447
2448            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2449                          mRight - mLeft - getCompoundPaddingLeft() -
2450                          getCompoundPaddingRight(), true);
2451        }
2452    }
2453
2454    /**
2455     * Returns the horizontal and vertical alignment of this TextView.
2456     *
2457     * @see android.view.Gravity
2458     * @attr ref android.R.styleable#TextView_gravity
2459     */
2460    public int getGravity() {
2461        return mGravity;
2462    }
2463
2464    /**
2465     * @return the flags on the Paint being used to display the text.
2466     * @see Paint#getFlags
2467     */
2468    public int getPaintFlags() {
2469        return mTextPaint.getFlags();
2470    }
2471
2472    /**
2473     * Sets flags on the Paint being used to display the text and
2474     * reflows the text if they are different from the old flags.
2475     * @see Paint#setFlags
2476     */
2477    @android.view.RemotableViewMethod
2478    public void setPaintFlags(int flags) {
2479        if (mTextPaint.getFlags() != flags) {
2480            mTextPaint.setFlags(flags);
2481
2482            if (mLayout != null) {
2483                nullLayouts();
2484                requestLayout();
2485                invalidate();
2486            }
2487        }
2488    }
2489
2490    /**
2491     * Sets whether the text should be allowed to be wider than the
2492     * View is.  If false, it will be wrapped to the width of the View.
2493     *
2494     * @attr ref android.R.styleable#TextView_scrollHorizontally
2495     */
2496    public void setHorizontallyScrolling(boolean whether) {
2497        if (mHorizontallyScrolling != whether) {
2498            mHorizontallyScrolling = whether;
2499
2500            if (mLayout != null) {
2501                nullLayouts();
2502                requestLayout();
2503                invalidate();
2504            }
2505        }
2506    }
2507
2508    /**
2509     * Makes the TextView at least this many lines tall.
2510     *
2511     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2512     * set this value to 1.
2513     *
2514     * @attr ref android.R.styleable#TextView_minLines
2515     */
2516    @android.view.RemotableViewMethod
2517    public void setMinLines(int minlines) {
2518        mMinimum = minlines;
2519        mMinMode = LINES;
2520
2521        requestLayout();
2522        invalidate();
2523    }
2524
2525    /**
2526     * Makes the TextView at least this many pixels tall.
2527     *
2528     * Setting this value overrides any other (minimum) number of lines setting.
2529     *
2530     * @attr ref android.R.styleable#TextView_minHeight
2531     */
2532    @android.view.RemotableViewMethod
2533    public void setMinHeight(int minHeight) {
2534        mMinimum = minHeight;
2535        mMinMode = PIXELS;
2536
2537        requestLayout();
2538        invalidate();
2539    }
2540
2541    /**
2542     * Makes the TextView at most this many lines tall.
2543     *
2544     * Setting this value overrides any other (maximum) height setting.
2545     *
2546     * @attr ref android.R.styleable#TextView_maxLines
2547     */
2548    @android.view.RemotableViewMethod
2549    public void setMaxLines(int maxlines) {
2550        mMaximum = maxlines;
2551        mMaxMode = LINES;
2552
2553        requestLayout();
2554        invalidate();
2555    }
2556
2557    /**
2558     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2559     * {@link #setMaxLines(int)} method.
2560     *
2561     * Setting this value overrides any other (maximum) number of lines setting.
2562     *
2563     * @attr ref android.R.styleable#TextView_maxHeight
2564     */
2565    @android.view.RemotableViewMethod
2566    public void setMaxHeight(int maxHeight) {
2567        mMaximum = maxHeight;
2568        mMaxMode = PIXELS;
2569
2570        requestLayout();
2571        invalidate();
2572    }
2573
2574    /**
2575     * Makes the TextView exactly this many lines tall.
2576     *
2577     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2578     * height setting. A single line TextView will set this value to 1.
2579     *
2580     * @attr ref android.R.styleable#TextView_lines
2581     */
2582    @android.view.RemotableViewMethod
2583    public void setLines(int lines) {
2584        mMaximum = mMinimum = lines;
2585        mMaxMode = mMinMode = LINES;
2586
2587        requestLayout();
2588        invalidate();
2589    }
2590
2591    /**
2592     * Makes the TextView exactly this many pixels tall.
2593     * You could do the same thing by specifying this number in the
2594     * LayoutParams.
2595     *
2596     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2597     * height setting.
2598     *
2599     * @attr ref android.R.styleable#TextView_height
2600     */
2601    @android.view.RemotableViewMethod
2602    public void setHeight(int pixels) {
2603        mMaximum = mMinimum = pixels;
2604        mMaxMode = mMinMode = PIXELS;
2605
2606        requestLayout();
2607        invalidate();
2608    }
2609
2610    /**
2611     * Makes the TextView at least this many ems wide
2612     *
2613     * @attr ref android.R.styleable#TextView_minEms
2614     */
2615    @android.view.RemotableViewMethod
2616    public void setMinEms(int minems) {
2617        mMinWidth = minems;
2618        mMinWidthMode = EMS;
2619
2620        requestLayout();
2621        invalidate();
2622    }
2623
2624    /**
2625     * Makes the TextView at least this many pixels wide
2626     *
2627     * @attr ref android.R.styleable#TextView_minWidth
2628     */
2629    @android.view.RemotableViewMethod
2630    public void setMinWidth(int minpixels) {
2631        mMinWidth = minpixels;
2632        mMinWidthMode = PIXELS;
2633
2634        requestLayout();
2635        invalidate();
2636    }
2637
2638    /**
2639     * Makes the TextView at most this many ems wide
2640     *
2641     * @attr ref android.R.styleable#TextView_maxEms
2642     */
2643    @android.view.RemotableViewMethod
2644    public void setMaxEms(int maxems) {
2645        mMaxWidth = maxems;
2646        mMaxWidthMode = EMS;
2647
2648        requestLayout();
2649        invalidate();
2650    }
2651
2652    /**
2653     * Makes the TextView at most this many pixels wide
2654     *
2655     * @attr ref android.R.styleable#TextView_maxWidth
2656     */
2657    @android.view.RemotableViewMethod
2658    public void setMaxWidth(int maxpixels) {
2659        mMaxWidth = maxpixels;
2660        mMaxWidthMode = PIXELS;
2661
2662        requestLayout();
2663        invalidate();
2664    }
2665
2666    /**
2667     * Makes the TextView exactly this many ems wide
2668     *
2669     * @attr ref android.R.styleable#TextView_ems
2670     */
2671    @android.view.RemotableViewMethod
2672    public void setEms(int ems) {
2673        mMaxWidth = mMinWidth = ems;
2674        mMaxWidthMode = mMinWidthMode = EMS;
2675
2676        requestLayout();
2677        invalidate();
2678    }
2679
2680    /**
2681     * Makes the TextView exactly this many pixels wide.
2682     * You could do the same thing by specifying this number in the
2683     * LayoutParams.
2684     *
2685     * @attr ref android.R.styleable#TextView_width
2686     */
2687    @android.view.RemotableViewMethod
2688    public void setWidth(int pixels) {
2689        mMaxWidth = mMinWidth = pixels;
2690        mMaxWidthMode = mMinWidthMode = PIXELS;
2691
2692        requestLayout();
2693        invalidate();
2694    }
2695
2696
2697    /**
2698     * Sets line spacing for this TextView.  Each line will have its height
2699     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2700     *
2701     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2702     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2703     */
2704    public void setLineSpacing(float add, float mult) {
2705        if (mSpacingAdd != add || mSpacingMult != mult) {
2706            mSpacingAdd = add;
2707            mSpacingMult = mult;
2708
2709            if (mLayout != null) {
2710                nullLayouts();
2711                requestLayout();
2712                invalidate();
2713            }
2714        }
2715    }
2716
2717    /**
2718     * Convenience method: Append the specified text to the TextView's
2719     * display buffer, upgrading it to BufferType.EDITABLE if it was
2720     * not already editable.
2721     */
2722    public final void append(CharSequence text) {
2723        append(text, 0, text.length());
2724    }
2725
2726    /**
2727     * Convenience method: Append the specified text slice to the TextView's
2728     * display buffer, upgrading it to BufferType.EDITABLE if it was
2729     * not already editable.
2730     */
2731    public void append(CharSequence text, int start, int end) {
2732        if (!(mText instanceof Editable)) {
2733            setText(mText, BufferType.EDITABLE);
2734        }
2735
2736        ((Editable) mText).append(text, start, end);
2737    }
2738
2739    private void updateTextColors() {
2740        boolean inval = false;
2741        int color = mTextColor.getColorForState(getDrawableState(), 0);
2742        if (color != mCurTextColor) {
2743            mCurTextColor = color;
2744            inval = true;
2745        }
2746        if (mLinkTextColor != null) {
2747            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2748            if (color != mTextPaint.linkColor) {
2749                mTextPaint.linkColor = color;
2750                inval = true;
2751            }
2752        }
2753        if (mHintTextColor != null) {
2754            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2755            if (color != mCurHintTextColor && mText.length() == 0) {
2756                mCurHintTextColor = color;
2757                inval = true;
2758            }
2759        }
2760        if (inval) {
2761            invalidate();
2762        }
2763    }
2764
2765    @Override
2766    protected void drawableStateChanged() {
2767        super.drawableStateChanged();
2768        if (mTextColor != null && mTextColor.isStateful()
2769                || (mHintTextColor != null && mHintTextColor.isStateful())
2770                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2771            updateTextColors();
2772        }
2773
2774        final Drawables dr = mDrawables;
2775        if (dr != null) {
2776            int[] state = getDrawableState();
2777            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2778                dr.mDrawableTop.setState(state);
2779            }
2780            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2781                dr.mDrawableBottom.setState(state);
2782            }
2783            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2784                dr.mDrawableLeft.setState(state);
2785            }
2786            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2787                dr.mDrawableRight.setState(state);
2788            }
2789            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2790                dr.mDrawableStart.setState(state);
2791            }
2792            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2793                dr.mDrawableEnd.setState(state);
2794            }
2795        }
2796    }
2797
2798    /**
2799     * User interface state that is stored by TextView for implementing
2800     * {@link View#onSaveInstanceState}.
2801     */
2802    public static class SavedState extends BaseSavedState {
2803        int selStart;
2804        int selEnd;
2805        CharSequence text;
2806        boolean frozenWithFocus;
2807        CharSequence error;
2808
2809        SavedState(Parcelable superState) {
2810            super(superState);
2811        }
2812
2813        @Override
2814        public void writeToParcel(Parcel out, int flags) {
2815            super.writeToParcel(out, flags);
2816            out.writeInt(selStart);
2817            out.writeInt(selEnd);
2818            out.writeInt(frozenWithFocus ? 1 : 0);
2819            TextUtils.writeToParcel(text, out, flags);
2820
2821            if (error == null) {
2822                out.writeInt(0);
2823            } else {
2824                out.writeInt(1);
2825                TextUtils.writeToParcel(error, out, flags);
2826            }
2827        }
2828
2829        @Override
2830        public String toString() {
2831            String str = "TextView.SavedState{"
2832                    + Integer.toHexString(System.identityHashCode(this))
2833                    + " start=" + selStart + " end=" + selEnd;
2834            if (text != null) {
2835                str += " text=" + text;
2836            }
2837            return str + "}";
2838        }
2839
2840        @SuppressWarnings("hiding")
2841        public static final Parcelable.Creator<SavedState> CREATOR
2842                = new Parcelable.Creator<SavedState>() {
2843            public SavedState createFromParcel(Parcel in) {
2844                return new SavedState(in);
2845            }
2846
2847            public SavedState[] newArray(int size) {
2848                return new SavedState[size];
2849            }
2850        };
2851
2852        private SavedState(Parcel in) {
2853            super(in);
2854            selStart = in.readInt();
2855            selEnd = in.readInt();
2856            frozenWithFocus = (in.readInt() != 0);
2857            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2858
2859            if (in.readInt() != 0) {
2860                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2861            }
2862        }
2863    }
2864
2865    @Override
2866    public Parcelable onSaveInstanceState() {
2867        Parcelable superState = super.onSaveInstanceState();
2868
2869        // Save state if we are forced to
2870        boolean save = mFreezesText;
2871        int start = 0;
2872        int end = 0;
2873
2874        if (mText != null) {
2875            start = getSelectionStart();
2876            end = getSelectionEnd();
2877            if (start >= 0 || end >= 0) {
2878                // Or save state if there is a selection
2879                save = true;
2880            }
2881        }
2882
2883        if (save) {
2884            SavedState ss = new SavedState(superState);
2885            // XXX Should also save the current scroll position!
2886            ss.selStart = start;
2887            ss.selEnd = end;
2888
2889            if (mText instanceof Spanned) {
2890                /*
2891                 * Calling setText() strips off any ChangeWatchers;
2892                 * strip them now to avoid leaking references.
2893                 * But do it to a copy so that if there are any
2894                 * further changes to the text of this view, it
2895                 * won't get into an inconsistent state.
2896                 */
2897
2898                Spannable sp = new SpannableString(mText);
2899
2900                for (ChangeWatcher cw :
2901                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2902                    sp.removeSpan(cw);
2903                }
2904
2905                // hideControllers would do it, but it gets called after this method on rotation
2906                sp.removeSpan(mSuggestionRangeSpan);
2907
2908                ss.text = sp;
2909            } else {
2910                ss.text = mText.toString();
2911            }
2912
2913            if (isFocused() && start >= 0 && end >= 0) {
2914                ss.frozenWithFocus = true;
2915            }
2916
2917            ss.error = mError;
2918
2919            return ss;
2920        }
2921
2922        return superState;
2923    }
2924
2925    @Override
2926    public void onRestoreInstanceState(Parcelable state) {
2927        if (!(state instanceof SavedState)) {
2928            super.onRestoreInstanceState(state);
2929            return;
2930        }
2931
2932        SavedState ss = (SavedState)state;
2933        super.onRestoreInstanceState(ss.getSuperState());
2934
2935        // XXX restore buffer type too, as well as lots of other stuff
2936        if (ss.text != null) {
2937            setText(ss.text);
2938        }
2939
2940        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2941            if (mText instanceof Spannable) {
2942                int len = mText.length();
2943
2944                if (ss.selStart > len || ss.selEnd > len) {
2945                    String restored = "";
2946
2947                    if (ss.text != null) {
2948                        restored = "(restored) ";
2949                    }
2950
2951                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2952                          "/" + ss.selEnd + " out of range for " + restored +
2953                          "text " + mText);
2954                } else {
2955                    Selection.setSelection((Spannable) mText, ss.selStart,
2956                                           ss.selEnd);
2957
2958                    if (ss.frozenWithFocus) {
2959                        mFrozenWithFocus = true;
2960                    }
2961                }
2962            }
2963        }
2964
2965        if (ss.error != null) {
2966            final CharSequence error = ss.error;
2967            // Display the error later, after the first layout pass
2968            post(new Runnable() {
2969                public void run() {
2970                    setError(error);
2971                }
2972            });
2973        }
2974    }
2975
2976    /**
2977     * Control whether this text view saves its entire text contents when
2978     * freezing to an icicle, in addition to dynamic state such as cursor
2979     * position.  By default this is false, not saving the text.  Set to true
2980     * if the text in the text view is not being saved somewhere else in
2981     * persistent storage (such as in a content provider) so that if the
2982     * view is later thawed the user will not lose their data.
2983     *
2984     * @param freezesText Controls whether a frozen icicle should include the
2985     * entire text data: true to include it, false to not.
2986     *
2987     * @attr ref android.R.styleable#TextView_freezesText
2988     */
2989    @android.view.RemotableViewMethod
2990    public void setFreezesText(boolean freezesText) {
2991        mFreezesText = freezesText;
2992    }
2993
2994    /**
2995     * Return whether this text view is including its entire text contents
2996     * in frozen icicles.
2997     *
2998     * @return Returns true if text is included, false if it isn't.
2999     *
3000     * @see #setFreezesText
3001     */
3002    public boolean getFreezesText() {
3003        return mFreezesText;
3004    }
3005
3006    ///////////////////////////////////////////////////////////////////////////
3007
3008    /**
3009     * Sets the Factory used to create new Editables.
3010     */
3011    public final void setEditableFactory(Editable.Factory factory) {
3012        mEditableFactory = factory;
3013        setText(mText);
3014    }
3015
3016    /**
3017     * Sets the Factory used to create new Spannables.
3018     */
3019    public final void setSpannableFactory(Spannable.Factory factory) {
3020        mSpannableFactory = factory;
3021        setText(mText);
3022    }
3023
3024    /**
3025     * Sets the string value of the TextView. TextView <em>does not</em> accept
3026     * HTML-like formatting, which you can do with text strings in XML resource files.
3027     * To style your strings, attach android.text.style.* objects to a
3028     * {@link android.text.SpannableString SpannableString}, or see the
3029     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3030     * Available Resource Types</a> documentation for an example of setting
3031     * formatted text in the XML resource file.
3032     *
3033     * @attr ref android.R.styleable#TextView_text
3034     */
3035    @android.view.RemotableViewMethod
3036    public final void setText(CharSequence text) {
3037        setText(text, mBufferType);
3038    }
3039
3040    /**
3041     * Like {@link #setText(CharSequence)},
3042     * except that the cursor position (if any) is retained in the new text.
3043     *
3044     * @param text The new text to place in the text view.
3045     *
3046     * @see #setText(CharSequence)
3047     */
3048    @android.view.RemotableViewMethod
3049    public final void setTextKeepState(CharSequence text) {
3050        setTextKeepState(text, mBufferType);
3051    }
3052
3053    /**
3054     * Sets the text that this TextView is to display (see
3055     * {@link #setText(CharSequence)}) and also sets whether it is stored
3056     * in a styleable/spannable buffer and whether it is editable.
3057     *
3058     * @attr ref android.R.styleable#TextView_text
3059     * @attr ref android.R.styleable#TextView_bufferType
3060     */
3061    public void setText(CharSequence text, BufferType type) {
3062        setText(text, type, true, 0);
3063
3064        if (mCharWrapper != null) {
3065            mCharWrapper.mChars = null;
3066        }
3067    }
3068
3069    private void setText(CharSequence text, BufferType type,
3070                         boolean notifyBefore, int oldlen) {
3071        if (text == null) {
3072            text = "";
3073        }
3074
3075        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3076
3077        if (text instanceof Spanned &&
3078            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3079            setHorizontalFadingEdgeEnabled(
3080                    ViewConfiguration.get(mContext).isFadingMarqueeEnabled());
3081            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3082        }
3083
3084        int n = mFilters.length;
3085        for (int i = 0; i < n; i++) {
3086            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3087                                                  EMPTY_SPANNED, 0, 0);
3088            if (out != null) {
3089                text = out;
3090            }
3091        }
3092
3093        if (notifyBefore) {
3094            if (mText != null) {
3095                oldlen = mText.length();
3096                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3097            } else {
3098                sendBeforeTextChanged("", 0, 0, text.length());
3099            }
3100        }
3101
3102        boolean needEditableForNotification = false;
3103
3104        if (mListeners != null && mListeners.size() != 0) {
3105            needEditableForNotification = true;
3106        }
3107
3108        if (type == BufferType.EDITABLE || mInput != null ||
3109            needEditableForNotification) {
3110            Editable t = mEditableFactory.newEditable(text);
3111            text = t;
3112            setFilters(t, mFilters);
3113            InputMethodManager imm = InputMethodManager.peekInstance();
3114            if (imm != null) imm.restartInput(this);
3115        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3116            text = mSpannableFactory.newSpannable(text);
3117        } else if (!(text instanceof CharWrapper)) {
3118            text = TextUtils.stringOrSpannedString(text);
3119        }
3120
3121        if (mAutoLinkMask != 0) {
3122            Spannable s2;
3123
3124            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3125                s2 = (Spannable) text;
3126            } else {
3127                s2 = mSpannableFactory.newSpannable(text);
3128            }
3129
3130            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3131                text = s2;
3132                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3133
3134                /*
3135                 * We must go ahead and set the text before changing the
3136                 * movement method, because setMovementMethod() may call
3137                 * setText() again to try to upgrade the buffer type.
3138                 */
3139                mText = text;
3140
3141                // Do not change the movement method for text that support text selection as it
3142                // would prevent an arbitrary cursor displacement.
3143                if (mLinksClickable && !textCanBeSelected()) {
3144                    setMovementMethod(LinkMovementMethod.getInstance());
3145                }
3146            }
3147        }
3148
3149        mBufferType = type;
3150        mText = text;
3151
3152        if (mTransformation == null) {
3153            mTransformed = text;
3154        } else {
3155            mTransformed = mTransformation.getTransformation(text, this);
3156        }
3157
3158        final int textLength = text.length();
3159
3160        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3161            Spannable sp = (Spannable) text;
3162
3163            // Remove any ChangeWatchers that might have come
3164            // from other TextViews.
3165            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3166            final int count = watchers.length;
3167            for (int i = 0; i < count; i++)
3168                sp.removeSpan(watchers[i]);
3169
3170            if (mChangeWatcher == null)
3171                mChangeWatcher = new ChangeWatcher();
3172
3173            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3174                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3175
3176            if (mInput != null) {
3177                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3178            }
3179
3180            if (mTransformation != null) {
3181                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3182            }
3183
3184            if (mMovement != null) {
3185                mMovement.initialize(this, (Spannable) text);
3186
3187                /*
3188                 * Initializing the movement method will have set the
3189                 * selection, so reset mSelectionMoved to keep that from
3190                 * interfering with the normal on-focus selection-setting.
3191                 */
3192                mSelectionMoved = false;
3193            }
3194        }
3195
3196        if (mLayout != null) {
3197            checkForRelayout();
3198        }
3199
3200        sendOnTextChanged(text, 0, oldlen, textLength);
3201        onTextChanged(text, 0, oldlen, textLength);
3202
3203        if (needEditableForNotification) {
3204            sendAfterTextChanged((Editable) text);
3205        }
3206
3207        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3208        prepareCursorControllers();
3209    }
3210
3211    /**
3212     * Sets the TextView to display the specified slice of the specified
3213     * char array.  You must promise that you will not change the contents
3214     * of the array except for right before another call to setText(),
3215     * since the TextView has no way to know that the text
3216     * has changed and that it needs to invalidate and re-layout.
3217     */
3218    public final void setText(char[] text, int start, int len) {
3219        int oldlen = 0;
3220
3221        if (start < 0 || len < 0 || start + len > text.length) {
3222            throw new IndexOutOfBoundsException(start + ", " + len);
3223        }
3224
3225        /*
3226         * We must do the before-notification here ourselves because if
3227         * the old text is a CharWrapper we destroy it before calling
3228         * into the normal path.
3229         */
3230        if (mText != null) {
3231            oldlen = mText.length();
3232            sendBeforeTextChanged(mText, 0, oldlen, len);
3233        } else {
3234            sendBeforeTextChanged("", 0, 0, len);
3235        }
3236
3237        if (mCharWrapper == null) {
3238            mCharWrapper = new CharWrapper(text, start, len);
3239        } else {
3240            mCharWrapper.set(text, start, len);
3241        }
3242
3243        setText(mCharWrapper, mBufferType, false, oldlen);
3244    }
3245
3246    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3247        private char[] mChars;
3248        private int mStart, mLength;
3249
3250        public CharWrapper(char[] chars, int start, int len) {
3251            mChars = chars;
3252            mStart = start;
3253            mLength = len;
3254        }
3255
3256        /* package */ void set(char[] chars, int start, int len) {
3257            mChars = chars;
3258            mStart = start;
3259            mLength = len;
3260        }
3261
3262        public int length() {
3263            return mLength;
3264        }
3265
3266        public char charAt(int off) {
3267            return mChars[off + mStart];
3268        }
3269
3270        @Override
3271        public String toString() {
3272            return new String(mChars, mStart, mLength);
3273        }
3274
3275        public CharSequence subSequence(int start, int end) {
3276            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3277                throw new IndexOutOfBoundsException(start + ", " + end);
3278            }
3279
3280            return new String(mChars, start + mStart, end - start);
3281        }
3282
3283        public void getChars(int start, int end, char[] buf, int off) {
3284            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3285                throw new IndexOutOfBoundsException(start + ", " + end);
3286            }
3287
3288            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3289        }
3290
3291        public void drawText(Canvas c, int start, int end,
3292                             float x, float y, Paint p) {
3293            c.drawText(mChars, start + mStart, end - start, x, y, p);
3294        }
3295
3296        public void drawTextRun(Canvas c, int start, int end,
3297                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3298            int count = end - start;
3299            int contextCount = contextEnd - contextStart;
3300            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3301                    contextCount, x, y, flags, p);
3302        }
3303
3304        public float measureText(int start, int end, Paint p) {
3305            return p.measureText(mChars, start + mStart, end - start);
3306        }
3307
3308        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3309            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3310        }
3311
3312        public float getTextRunAdvances(int start, int end, int contextStart,
3313                int contextEnd, int flags, float[] advances, int advancesIndex,
3314                Paint p) {
3315            int count = end - start;
3316            int contextCount = contextEnd - contextStart;
3317            return p.getTextRunAdvances(mChars, start + mStart, count,
3318                    contextStart + mStart, contextCount, flags, advances,
3319                    advancesIndex);
3320        }
3321
3322        public float getTextRunAdvances(int start, int end, int contextStart,
3323                int contextEnd, int flags, float[] advances, int advancesIndex,
3324                Paint p, int reserved) {
3325            int count = end - start;
3326            int contextCount = contextEnd - contextStart;
3327            return p.getTextRunAdvances(mChars, start + mStart, count,
3328                    contextStart + mStart, contextCount, flags, advances,
3329                    advancesIndex, reserved);
3330        }
3331
3332        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3333                int offset, int cursorOpt, Paint p) {
3334            int contextCount = contextEnd - contextStart;
3335            return p.getTextRunCursor(mChars, contextStart + mStart,
3336                    contextCount, flags, offset + mStart, cursorOpt);
3337        }
3338    }
3339
3340    /**
3341     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3342     * except that the cursor position (if any) is retained in the new text.
3343     *
3344     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3345     */
3346    public final void setTextKeepState(CharSequence text, BufferType type) {
3347        int start = getSelectionStart();
3348        int end = getSelectionEnd();
3349        int len = text.length();
3350
3351        setText(text, type);
3352
3353        if (start >= 0 || end >= 0) {
3354            if (mText instanceof Spannable) {
3355                Selection.setSelection((Spannable) mText,
3356                                       Math.max(0, Math.min(start, len)),
3357                                       Math.max(0, Math.min(end, len)));
3358            }
3359        }
3360    }
3361
3362    @android.view.RemotableViewMethod
3363    public final void setText(int resid) {
3364        setText(getContext().getResources().getText(resid));
3365    }
3366
3367    public final void setText(int resid, BufferType type) {
3368        setText(getContext().getResources().getText(resid), type);
3369    }
3370
3371    /**
3372     * Sets the text to be displayed when the text of the TextView is empty.
3373     * Null means to use the normal empty text. The hint does not currently
3374     * participate in determining the size of the view.
3375     *
3376     * @attr ref android.R.styleable#TextView_hint
3377     */
3378    @android.view.RemotableViewMethod
3379    public final void setHint(CharSequence hint) {
3380        mHint = TextUtils.stringOrSpannedString(hint);
3381
3382        if (mLayout != null) {
3383            checkForRelayout();
3384        }
3385
3386        if (mText.length() == 0) {
3387            invalidate();
3388        }
3389    }
3390
3391    /**
3392     * Sets the text to be displayed when the text of the TextView is empty,
3393     * from a resource.
3394     *
3395     * @attr ref android.R.styleable#TextView_hint
3396     */
3397    @android.view.RemotableViewMethod
3398    public final void setHint(int resid) {
3399        setHint(getContext().getResources().getText(resid));
3400    }
3401
3402    /**
3403     * Returns the hint that is displayed when the text of the TextView
3404     * is empty.
3405     *
3406     * @attr ref android.R.styleable#TextView_hint
3407     */
3408    @ViewDebug.CapturedViewProperty
3409    public CharSequence getHint() {
3410        return mHint;
3411    }
3412
3413    private static boolean isMultilineInputType(int type) {
3414        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3415            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3416    }
3417
3418    /**
3419     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3420     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3421     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3422     * then a soft keyboard will not be displayed for this text view.
3423     *
3424     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3425     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3426     * type.
3427     *
3428     * @see #getInputType()
3429     * @see #setRawInputType(int)
3430     * @see android.text.InputType
3431     * @attr ref android.R.styleable#TextView_inputType
3432     */
3433    public void setInputType(int type) {
3434        final boolean wasPassword = isPasswordInputType(mInputType);
3435        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3436        setInputType(type, false);
3437        final boolean isPassword = isPasswordInputType(type);
3438        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3439        boolean forceUpdate = false;
3440        if (isPassword) {
3441            setTransformationMethod(PasswordTransformationMethod.getInstance());
3442            setTypefaceByIndex(MONOSPACE, 0);
3443        } else if (isVisiblePassword) {
3444            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3445                forceUpdate = true;
3446            }
3447            setTypefaceByIndex(MONOSPACE, 0);
3448        } else if (wasPassword || wasVisiblePassword) {
3449            // not in password mode, clean up typeface and transformation
3450            setTypefaceByIndex(-1, -1);
3451            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3452                forceUpdate = true;
3453            }
3454        }
3455
3456        boolean singleLine = !isMultilineInputType(type);
3457
3458        // We need to update the single line mode if it has changed or we
3459        // were previously in password mode.
3460        if (mSingleLine != singleLine || forceUpdate) {
3461            // Change single line mode, but only change the transformation if
3462            // we are not in password mode.
3463            applySingleLine(singleLine, !isPassword, true);
3464        }
3465
3466        InputMethodManager imm = InputMethodManager.peekInstance();
3467        if (imm != null) imm.restartInput(this);
3468    }
3469
3470    /**
3471     * It would be better to rely on the input type for everything. A password inputType should have
3472     * a password transformation. We should hence use isPasswordInputType instead of this method.
3473     *
3474     * We should:
3475     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3476     * would install the correct transformation).
3477     * - Refuse the installation of a non-password transformation in setTransformation if the input
3478     * type is password.
3479     *
3480     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3481     * is useful since it matches what the user can see (obfuscated text or not).
3482     *
3483     * @return true if the current transformation method is of the password type.
3484     */
3485    private boolean hasPasswordTransformationMethod() {
3486        return mTransformation instanceof PasswordTransformationMethod;
3487    }
3488
3489    private static boolean isPasswordInputType(int inputType) {
3490        final int variation =
3491                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3492        return variation
3493                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3494                || variation
3495                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3496                || variation
3497                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3498    }
3499
3500    private static boolean isVisiblePasswordInputType(int inputType) {
3501        final int variation =
3502                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3503        return variation
3504                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3505    }
3506
3507    /**
3508     * Directly change the content type integer of the text view, without
3509     * modifying any other state.
3510     * @see #setInputType(int)
3511     * @see android.text.InputType
3512     * @attr ref android.R.styleable#TextView_inputType
3513     */
3514    public void setRawInputType(int type) {
3515        mInputType = type;
3516    }
3517
3518    private void setInputType(int type, boolean direct) {
3519        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3520        KeyListener input;
3521        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3522            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3523            TextKeyListener.Capitalize cap;
3524            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3525                cap = TextKeyListener.Capitalize.CHARACTERS;
3526            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3527                cap = TextKeyListener.Capitalize.WORDS;
3528            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3529                cap = TextKeyListener.Capitalize.SENTENCES;
3530            } else {
3531                cap = TextKeyListener.Capitalize.NONE;
3532            }
3533            input = TextKeyListener.getInstance(autotext, cap);
3534        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3535            input = DigitsKeyListener.getInstance(
3536                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3537                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3538        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3539            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3540                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3541                    input = DateKeyListener.getInstance();
3542                    break;
3543                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3544                    input = TimeKeyListener.getInstance();
3545                    break;
3546                default:
3547                    input = DateTimeKeyListener.getInstance();
3548                    break;
3549            }
3550        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3551            input = DialerKeyListener.getInstance();
3552        } else {
3553            input = TextKeyListener.getInstance();
3554        }
3555        setRawInputType(type);
3556        if (direct) mInput = input;
3557        else {
3558            setKeyListenerOnly(input);
3559        }
3560    }
3561
3562    /**
3563     * Get the type of the content.
3564     *
3565     * @see #setInputType(int)
3566     * @see android.text.InputType
3567     */
3568    public int getInputType() {
3569        return mInputType;
3570    }
3571
3572    /**
3573     * Change the editor type integer associated with the text view, which
3574     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3575     * has focus.
3576     * @see #getImeOptions
3577     * @see android.view.inputmethod.EditorInfo
3578     * @attr ref android.R.styleable#TextView_imeOptions
3579     */
3580    public void setImeOptions(int imeOptions) {
3581        if (mInputContentType == null) {
3582            mInputContentType = new InputContentType();
3583        }
3584        mInputContentType.imeOptions = imeOptions;
3585    }
3586
3587    /**
3588     * Get the type of the IME editor.
3589     *
3590     * @see #setImeOptions(int)
3591     * @see android.view.inputmethod.EditorInfo
3592     */
3593    public int getImeOptions() {
3594        return mInputContentType != null
3595                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3596    }
3597
3598    /**
3599     * Change the custom IME action associated with the text view, which
3600     * will be reported to an IME with {@link EditorInfo#actionLabel}
3601     * and {@link EditorInfo#actionId} when it has focus.
3602     * @see #getImeActionLabel
3603     * @see #getImeActionId
3604     * @see android.view.inputmethod.EditorInfo
3605     * @attr ref android.R.styleable#TextView_imeActionLabel
3606     * @attr ref android.R.styleable#TextView_imeActionId
3607     */
3608    public void setImeActionLabel(CharSequence label, int actionId) {
3609        if (mInputContentType == null) {
3610            mInputContentType = new InputContentType();
3611        }
3612        mInputContentType.imeActionLabel = label;
3613        mInputContentType.imeActionId = actionId;
3614    }
3615
3616    /**
3617     * Get the IME action label previous set with {@link #setImeActionLabel}.
3618     *
3619     * @see #setImeActionLabel
3620     * @see android.view.inputmethod.EditorInfo
3621     */
3622    public CharSequence getImeActionLabel() {
3623        return mInputContentType != null
3624                ? mInputContentType.imeActionLabel : null;
3625    }
3626
3627    /**
3628     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3629     *
3630     * @see #setImeActionLabel
3631     * @see android.view.inputmethod.EditorInfo
3632     */
3633    public int getImeActionId() {
3634        return mInputContentType != null
3635                ? mInputContentType.imeActionId : 0;
3636    }
3637
3638    /**
3639     * Set a special listener to be called when an action is performed
3640     * on the text view.  This will be called when the enter key is pressed,
3641     * or when an action supplied to the IME is selected by the user.  Setting
3642     * this means that the normal hard key event will not insert a newline
3643     * into the text view, even if it is multi-line; holding down the ALT
3644     * modifier will, however, allow the user to insert a newline character.
3645     */
3646    public void setOnEditorActionListener(OnEditorActionListener l) {
3647        if (mInputContentType == null) {
3648            mInputContentType = new InputContentType();
3649        }
3650        mInputContentType.onEditorActionListener = l;
3651    }
3652
3653    /**
3654     * Called when an attached input method calls
3655     * {@link InputConnection#performEditorAction(int)
3656     * InputConnection.performEditorAction()}
3657     * for this text view.  The default implementation will call your action
3658     * listener supplied to {@link #setOnEditorActionListener}, or perform
3659     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3660     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3661     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3662     * EditorInfo.IME_ACTION_DONE}.
3663     *
3664     * <p>For backwards compatibility, if no IME options have been set and the
3665     * text view would not normally advance focus on enter, then
3666     * the NEXT and DONE actions received here will be turned into an enter
3667     * key down/up pair to go through the normal key handling.
3668     *
3669     * @param actionCode The code of the action being performed.
3670     *
3671     * @see #setOnEditorActionListener
3672     */
3673    public void onEditorAction(int actionCode) {
3674        final InputContentType ict = mInputContentType;
3675        if (ict != null) {
3676            if (ict.onEditorActionListener != null) {
3677                if (ict.onEditorActionListener.onEditorAction(this,
3678                        actionCode, null)) {
3679                    return;
3680                }
3681            }
3682
3683            // This is the handling for some default action.
3684            // Note that for backwards compatibility we don't do this
3685            // default handling if explicit ime options have not been given,
3686            // instead turning this into the normal enter key codes that an
3687            // app may be expecting.
3688            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3689                View v = focusSearch(FOCUS_DOWN);
3690                if (v != null) {
3691                    if (!v.requestFocus(FOCUS_DOWN)) {
3692                        throw new IllegalStateException("focus search returned a view " +
3693                                "that wasn't able to take focus!");
3694                    }
3695                }
3696                return;
3697
3698            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3699                View v = focusSearch(FOCUS_UP);
3700                if (v != null) {
3701                    if (!v.requestFocus(FOCUS_UP)) {
3702                        throw new IllegalStateException("focus search returned a view " +
3703                                "that wasn't able to take focus!");
3704                    }
3705                }
3706                return;
3707
3708            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3709                InputMethodManager imm = InputMethodManager.peekInstance();
3710                if (imm != null && imm.isActive(this)) {
3711                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3712                }
3713                return;
3714            }
3715        }
3716
3717        Handler h = getHandler();
3718        if (h != null) {
3719            long eventTime = SystemClock.uptimeMillis();
3720            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3721                    new KeyEvent(eventTime, eventTime,
3722                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3723                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3724                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3725                    | KeyEvent.FLAG_EDITOR_ACTION)));
3726            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3727                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3728                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3729                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3730                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3731                    | KeyEvent.FLAG_EDITOR_ACTION)));
3732        }
3733    }
3734
3735    /**
3736     * Set the private content type of the text, which is the
3737     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3738     * field that will be filled in when creating an input connection.
3739     *
3740     * @see #getPrivateImeOptions()
3741     * @see EditorInfo#privateImeOptions
3742     * @attr ref android.R.styleable#TextView_privateImeOptions
3743     */
3744    public void setPrivateImeOptions(String type) {
3745        if (mInputContentType == null) mInputContentType = new InputContentType();
3746        mInputContentType.privateImeOptions = type;
3747    }
3748
3749    /**
3750     * Get the private type of the content.
3751     *
3752     * @see #setPrivateImeOptions(String)
3753     * @see EditorInfo#privateImeOptions
3754     */
3755    public String getPrivateImeOptions() {
3756        return mInputContentType != null
3757                ? mInputContentType.privateImeOptions : null;
3758    }
3759
3760    /**
3761     * Set the extra input data of the text, which is the
3762     * {@link EditorInfo#extras TextBoxAttribute.extras}
3763     * Bundle that will be filled in when creating an input connection.  The
3764     * given integer is the resource ID of an XML resource holding an
3765     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3766     *
3767     * @see #getInputExtras(boolean)
3768     * @see EditorInfo#extras
3769     * @attr ref android.R.styleable#TextView_editorExtras
3770     */
3771    public void setInputExtras(int xmlResId)
3772            throws XmlPullParserException, IOException {
3773        XmlResourceParser parser = getResources().getXml(xmlResId);
3774        if (mInputContentType == null) mInputContentType = new InputContentType();
3775        mInputContentType.extras = new Bundle();
3776        getResources().parseBundleExtras(parser, mInputContentType.extras);
3777    }
3778
3779    /**
3780     * Retrieve the input extras currently associated with the text view, which
3781     * can be viewed as well as modified.
3782     *
3783     * @param create If true, the extras will be created if they don't already
3784     * exist.  Otherwise, null will be returned if none have been created.
3785     * @see #setInputExtras(int)
3786     * @see EditorInfo#extras
3787     * @attr ref android.R.styleable#TextView_editorExtras
3788     */
3789    public Bundle getInputExtras(boolean create) {
3790        if (mInputContentType == null) {
3791            if (!create) return null;
3792            mInputContentType = new InputContentType();
3793        }
3794        if (mInputContentType.extras == null) {
3795            if (!create) return null;
3796            mInputContentType.extras = new Bundle();
3797        }
3798        return mInputContentType.extras;
3799    }
3800
3801    /**
3802     * Returns the error message that was set to be displayed with
3803     * {@link #setError}, or <code>null</code> if no error was set
3804     * or if it the error was cleared by the widget after user input.
3805     */
3806    public CharSequence getError() {
3807        return mError;
3808    }
3809
3810    /**
3811     * Sets the right-hand compound drawable of the TextView to the "error"
3812     * icon and sets an error message that will be displayed in a popup when
3813     * the TextView has focus.  The icon and error message will be reset to
3814     * null when any key events cause changes to the TextView's text.  If the
3815     * <code>error</code> is <code>null</code>, the error message and icon
3816     * will be cleared.
3817     */
3818    @android.view.RemotableViewMethod
3819    public void setError(CharSequence error) {
3820        if (error == null) {
3821            setError(null, null);
3822        } else {
3823            Drawable dr = getContext().getResources().
3824                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3825
3826            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3827            setError(error, dr);
3828        }
3829    }
3830
3831    /**
3832     * Sets the right-hand compound drawable of the TextView to the specified
3833     * icon and sets an error message that will be displayed in a popup when
3834     * the TextView has focus.  The icon and error message will be reset to
3835     * null when any key events cause changes to the TextView's text.  The
3836     * drawable must already have had {@link Drawable#setBounds} set on it.
3837     * If the <code>error</code> is <code>null</code>, the error message will
3838     * be cleared (and you should provide a <code>null</code> icon as well).
3839     */
3840    public void setError(CharSequence error, Drawable icon) {
3841        error = TextUtils.stringOrSpannedString(error);
3842
3843        mError = error;
3844        mErrorWasChanged = true;
3845        final Drawables dr = mDrawables;
3846        if (dr != null) {
3847            switch (getResolvedLayoutDirection()) {
3848                default:
3849                case LAYOUT_DIRECTION_LTR:
3850                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3851                            dr.mDrawableBottom);
3852                    break;
3853                case LAYOUT_DIRECTION_RTL:
3854                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3855                            dr.mDrawableBottom);
3856                    break;
3857            }
3858        } else {
3859            setCompoundDrawables(null, null, icon, null);
3860        }
3861
3862        if (error == null) {
3863            if (mPopup != null) {
3864                if (mPopup.isShowing()) {
3865                    mPopup.dismiss();
3866                }
3867
3868                mPopup = null;
3869            }
3870        } else {
3871            if (isFocused()) {
3872                showError();
3873            }
3874        }
3875    }
3876
3877    private void showError() {
3878        if (getWindowToken() == null) {
3879            mShowErrorAfterAttach = true;
3880            return;
3881        }
3882
3883        if (mPopup == null) {
3884            LayoutInflater inflater = LayoutInflater.from(getContext());
3885            final TextView err = (TextView) inflater.inflate(
3886                    com.android.internal.R.layout.textview_hint, null);
3887
3888            final float scale = getResources().getDisplayMetrics().density;
3889            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3890            mPopup.setFocusable(false);
3891            // The user is entering text, so the input method is needed.  We
3892            // don't want the popup to be displayed on top of it.
3893            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3894        }
3895
3896        TextView tv = (TextView) mPopup.getContentView();
3897        chooseSize(mPopup, mError, tv);
3898        tv.setText(mError);
3899
3900        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3901        mPopup.fixDirection(mPopup.isAboveAnchor());
3902    }
3903
3904    private static class ErrorPopup extends PopupWindow {
3905        private boolean mAbove = false;
3906        private final TextView mView;
3907        private int mPopupInlineErrorBackgroundId = 0;
3908        private int mPopupInlineErrorAboveBackgroundId = 0;
3909
3910        ErrorPopup(TextView v, int width, int height) {
3911            super(v, width, height);
3912            mView = v;
3913            // Make sure the TextView has a background set as it will be used the first time it is
3914            // shown and positionned. Initialized with below background, which should have
3915            // dimensions identical to the above version for this to work (and is more likely).
3916            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3917                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3918            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3919        }
3920
3921        void fixDirection(boolean above) {
3922            mAbove = above;
3923
3924            if (above) {
3925                mPopupInlineErrorAboveBackgroundId =
3926                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3927                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3928            } else {
3929                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3930                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3931            }
3932
3933            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3934                mPopupInlineErrorBackgroundId);
3935        }
3936
3937        private int getResourceId(int currentId, int index) {
3938            if (currentId == 0) {
3939                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3940                        R.styleable.Theme);
3941                currentId = styledAttributes.getResourceId(index, 0);
3942                styledAttributes.recycle();
3943            }
3944            return currentId;
3945        }
3946
3947        @Override
3948        public void update(int x, int y, int w, int h, boolean force) {
3949            super.update(x, y, w, h, force);
3950
3951            boolean above = isAboveAnchor();
3952            if (above != mAbove) {
3953                fixDirection(above);
3954            }
3955        }
3956    }
3957
3958    /**
3959     * Returns the Y offset to make the pointy top of the error point
3960     * at the middle of the error icon.
3961     */
3962    private int getErrorX() {
3963        /*
3964         * The "25" is the distance between the point and the right edge
3965         * of the background
3966         */
3967        final float scale = getResources().getDisplayMetrics().density;
3968
3969        final Drawables dr = mDrawables;
3970        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3971                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3972    }
3973
3974    /**
3975     * Returns the Y offset to make the pointy top of the error point
3976     * at the bottom of the error icon.
3977     */
3978    private int getErrorY() {
3979        /*
3980         * Compound, not extended, because the icon is not clipped
3981         * if the text height is smaller.
3982         */
3983        final int compoundPaddingTop = getCompoundPaddingTop();
3984        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3985
3986        final Drawables dr = mDrawables;
3987        int icontop = compoundPaddingTop +
3988                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3989
3990        /*
3991         * The "2" is the distance between the point and the top edge
3992         * of the background.
3993         */
3994        final float scale = getResources().getDisplayMetrics().density;
3995        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
3996                (int) (2 * scale + 0.5f);
3997    }
3998
3999    private void hideError() {
4000        if (mPopup != null) {
4001            if (mPopup.isShowing()) {
4002                mPopup.dismiss();
4003            }
4004        }
4005
4006        mShowErrorAfterAttach = false;
4007    }
4008
4009    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4010        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4011        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4012
4013        /*
4014         * Figure out how big the text would be if we laid it out to the
4015         * full width of this view minus the border.
4016         */
4017        int cap = getWidth() - wid;
4018        if (cap < 0) {
4019            cap = 200; // We must not be measured yet -- setFrame() will fix it.
4020        }
4021
4022        Layout l = new StaticLayout(text, tv.getPaint(), cap,
4023                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4024        float max = 0;
4025        for (int i = 0; i < l.getLineCount(); i++) {
4026            max = Math.max(max, l.getLineWidth(i));
4027        }
4028
4029        /*
4030         * Now set the popup size to be big enough for the text plus the border.
4031         */
4032        pop.setWidth(wid + (int) Math.ceil(max));
4033        pop.setHeight(ht + l.getHeight());
4034    }
4035
4036
4037    @Override
4038    protected boolean setFrame(int l, int t, int r, int b) {
4039        boolean result = super.setFrame(l, t, r, b);
4040
4041        if (mPopup != null) {
4042            TextView tv = (TextView) mPopup.getContentView();
4043            chooseSize(mPopup, mError, tv);
4044            mPopup.update(this, getErrorX(), getErrorY(),
4045                          mPopup.getWidth(), mPopup.getHeight());
4046        }
4047
4048        restartMarqueeIfNeeded();
4049
4050        return result;
4051    }
4052
4053    private void restartMarqueeIfNeeded() {
4054        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4055            mRestartMarquee = false;
4056            startMarquee();
4057        }
4058    }
4059
4060    /**
4061     * Sets the list of input filters that will be used if the buffer is
4062     * Editable.  Has no effect otherwise.
4063     *
4064     * @attr ref android.R.styleable#TextView_maxLength
4065     */
4066    public void setFilters(InputFilter[] filters) {
4067        if (filters == null) {
4068            throw new IllegalArgumentException();
4069        }
4070
4071        mFilters = filters;
4072
4073        if (mText instanceof Editable) {
4074            setFilters((Editable) mText, filters);
4075        }
4076    }
4077
4078    /**
4079     * Sets the list of input filters on the specified Editable,
4080     * and includes mInput in the list if it is an InputFilter.
4081     */
4082    private void setFilters(Editable e, InputFilter[] filters) {
4083        if (mInput instanceof InputFilter) {
4084            InputFilter[] nf = new InputFilter[filters.length + 1];
4085
4086            System.arraycopy(filters, 0, nf, 0, filters.length);
4087            nf[filters.length] = (InputFilter) mInput;
4088
4089            e.setFilters(nf);
4090        } else {
4091            e.setFilters(filters);
4092        }
4093    }
4094
4095    /**
4096     * Returns the current list of input filters.
4097     */
4098    public InputFilter[] getFilters() {
4099        return mFilters;
4100    }
4101
4102    /////////////////////////////////////////////////////////////////////////
4103
4104    private int getVerticalOffset(boolean forceNormal) {
4105        int voffset = 0;
4106        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4107
4108        Layout l = mLayout;
4109        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4110            l = mHintLayout;
4111        }
4112
4113        if (gravity != Gravity.TOP) {
4114            int boxht;
4115
4116            if (l == mHintLayout) {
4117                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4118                        getCompoundPaddingBottom();
4119            } else {
4120                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4121                        getExtendedPaddingBottom();
4122            }
4123            int textht = l.getHeight();
4124
4125            if (textht < boxht) {
4126                if (gravity == Gravity.BOTTOM)
4127                    voffset = boxht - textht;
4128                else // (gravity == Gravity.CENTER_VERTICAL)
4129                    voffset = (boxht - textht) >> 1;
4130            }
4131        }
4132        return voffset;
4133    }
4134
4135    private int getBottomVerticalOffset(boolean forceNormal) {
4136        int voffset = 0;
4137        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4138
4139        Layout l = mLayout;
4140        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4141            l = mHintLayout;
4142        }
4143
4144        if (gravity != Gravity.BOTTOM) {
4145            int boxht;
4146
4147            if (l == mHintLayout) {
4148                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4149                        getCompoundPaddingBottom();
4150            } else {
4151                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4152                        getExtendedPaddingBottom();
4153            }
4154            int textht = l.getHeight();
4155
4156            if (textht < boxht) {
4157                if (gravity == Gravity.TOP)
4158                    voffset = boxht - textht;
4159                else // (gravity == Gravity.CENTER_VERTICAL)
4160                    voffset = (boxht - textht) >> 1;
4161            }
4162        }
4163        return voffset;
4164    }
4165
4166    private void invalidateCursorPath() {
4167        if (mHighlightPathBogus) {
4168            invalidateCursor();
4169        } else {
4170            final int horizontalPadding = getCompoundPaddingLeft();
4171            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4172
4173            if (mCursorCount == 0) {
4174                synchronized (sTempRect) {
4175                    /*
4176                     * The reason for this concern about the thickness of the
4177                     * cursor and doing the floor/ceil on the coordinates is that
4178                     * some EditTexts (notably textfields in the Browser) have
4179                     * anti-aliased text where not all the characters are
4180                     * necessarily at integer-multiple locations.  This should
4181                     * make sure the entire cursor gets invalidated instead of
4182                     * sometimes missing half a pixel.
4183                     */
4184                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4185                    if (thick < 1.0f) {
4186                        thick = 1.0f;
4187                    }
4188
4189                    thick /= 2.0f;
4190
4191                    mHighlightPath.computeBounds(sTempRect, false);
4192
4193                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4194                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4195                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4196                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4197                }
4198            } else {
4199                for (int i = 0; i < mCursorCount; i++) {
4200                    Rect bounds = mCursorDrawable[i].getBounds();
4201                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4202                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4203                }
4204            }
4205        }
4206    }
4207
4208    private void invalidateCursor() {
4209        int where = getSelectionEnd();
4210
4211        invalidateCursor(where, where, where);
4212    }
4213
4214    private void invalidateCursor(int a, int b, int c) {
4215        if (mLayout == null) {
4216            invalidate();
4217        } else {
4218            if (a >= 0 || b >= 0 || c >= 0) {
4219                int first = Math.min(Math.min(a, b), c);
4220                int last = Math.max(Math.max(a, b), c);
4221
4222                int line = mLayout.getLineForOffset(first);
4223                int top = mLayout.getLineTop(line);
4224
4225                // This is ridiculous, but the descent from the line above
4226                // can hang down into the line we really want to redraw,
4227                // so we have to invalidate part of the line above to make
4228                // sure everything that needs to be redrawn really is.
4229                // (But not the whole line above, because that would cause
4230                // the same problem with the descenders on the line above it!)
4231                if (line > 0) {
4232                    top -= mLayout.getLineDescent(line - 1);
4233                }
4234
4235                int line2;
4236
4237                if (first == last)
4238                    line2 = line;
4239                else
4240                    line2 = mLayout.getLineForOffset(last);
4241
4242                int bottom = mLayout.getLineTop(line2 + 1);
4243
4244                final int horizontalPadding = getCompoundPaddingLeft();
4245                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4246
4247                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4248                // the invalidated lines specified above.
4249                for (int i = 0; i < mCursorCount; i++) {
4250                    Rect bounds = mCursorDrawable[i].getBounds();
4251                    top = Math.min(top, bounds.top);
4252                    bottom = Math.max(bottom, bounds.bottom);
4253                    // Horizontal bounds are already full width, no need to update
4254                }
4255
4256                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4257                        horizontalPadding + mScrollX + getWidth() -
4258                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4259                        bottom + verticalPadding);
4260            }
4261        }
4262    }
4263
4264    private void registerForPreDraw() {
4265        final ViewTreeObserver observer = getViewTreeObserver();
4266
4267        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4268            observer.addOnPreDrawListener(this);
4269            mPreDrawState = PREDRAW_PENDING;
4270        } else if (mPreDrawState == PREDRAW_DONE) {
4271            mPreDrawState = PREDRAW_PENDING;
4272        }
4273
4274        // else state is PREDRAW_PENDING, so keep waiting.
4275    }
4276
4277    /**
4278     * {@inheritDoc}
4279     */
4280    public boolean onPreDraw() {
4281        if (mPreDrawState != PREDRAW_PENDING) {
4282            return true;
4283        }
4284
4285        if (mLayout == null) {
4286            assumeLayout();
4287        }
4288
4289        boolean changed = false;
4290
4291        if (mMovement != null) {
4292            /* This code also provides auto-scrolling when a cursor is moved using a
4293             * CursorController (insertion point or selection limits).
4294             * For selection, ensure start or end is visible depending on controller's state.
4295             */
4296            int curs = getSelectionEnd();
4297            // Do not create the controller if it is not already created.
4298            if (mSelectionModifierCursorController != null &&
4299                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4300                curs = getSelectionStart();
4301            }
4302
4303            /*
4304             * TODO: This should really only keep the end in view if
4305             * it already was before the text changed.  I'm not sure
4306             * of a good way to tell from here if it was.
4307             */
4308            if (curs < 0 &&
4309                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4310                curs = mText.length();
4311            }
4312
4313            if (curs >= 0) {
4314                changed = bringPointIntoView(curs);
4315            }
4316        } else {
4317            changed = bringTextIntoView();
4318        }
4319
4320        // This has to be checked here since:
4321        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4322        //   a screen rotation) since layout is not yet initialized at that point.
4323        if (mCreatedWithASelection) {
4324            startSelectionActionMode();
4325            mCreatedWithASelection = false;
4326        }
4327
4328        // Phone specific code (there is no ExtractEditText on tablets).
4329        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4330        // not be set. Do the test here instead.
4331        if (this instanceof ExtractEditText && hasSelection()) {
4332            startSelectionActionMode();
4333        }
4334
4335        mPreDrawState = PREDRAW_DONE;
4336        return !changed;
4337    }
4338
4339    @Override
4340    protected void onAttachedToWindow() {
4341        super.onAttachedToWindow();
4342
4343        mTemporaryDetach = false;
4344
4345        if (mShowErrorAfterAttach) {
4346            showError();
4347            mShowErrorAfterAttach = false;
4348        }
4349
4350        final ViewTreeObserver observer = getViewTreeObserver();
4351        // No need to create the controller.
4352        // The get method will add the listener on controller creation.
4353        if (mInsertionPointCursorController != null) {
4354            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4355        }
4356        if (mSelectionModifierCursorController != null) {
4357            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4358        }
4359
4360        // Resolve drawables as the layout direction has been resolved
4361        resolveDrawables();
4362    }
4363
4364    @Override
4365    protected void onDetachedFromWindow() {
4366        super.onDetachedFromWindow();
4367
4368        final ViewTreeObserver observer = getViewTreeObserver();
4369        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4370            observer.removeOnPreDrawListener(this);
4371            mPreDrawState = PREDRAW_NOT_REGISTERED;
4372        }
4373
4374        if (mError != null) {
4375            hideError();
4376        }
4377
4378        if (mBlink != null) {
4379            mBlink.removeCallbacks(mBlink);
4380        }
4381
4382        if (mInsertionPointCursorController != null) {
4383            mInsertionPointCursorController.onDetached();
4384        }
4385
4386        if (mSelectionModifierCursorController != null) {
4387            mSelectionModifierCursorController.onDetached();
4388        }
4389
4390        hideControllers();
4391
4392        resetResolvedDrawables();
4393    }
4394
4395    @Override
4396    protected boolean isPaddingOffsetRequired() {
4397        return mShadowRadius != 0 || mDrawables != null;
4398    }
4399
4400    @Override
4401    protected int getLeftPaddingOffset() {
4402        return getCompoundPaddingLeft() - mPaddingLeft +
4403                (int) Math.min(0, mShadowDx - mShadowRadius);
4404    }
4405
4406    @Override
4407    protected int getTopPaddingOffset() {
4408        return (int) Math.min(0, mShadowDy - mShadowRadius);
4409    }
4410
4411    @Override
4412    protected int getBottomPaddingOffset() {
4413        return (int) Math.max(0, mShadowDy + mShadowRadius);
4414    }
4415
4416    @Override
4417    protected int getRightPaddingOffset() {
4418        return -(getCompoundPaddingRight() - mPaddingRight) +
4419                (int) Math.max(0, mShadowDx + mShadowRadius);
4420    }
4421
4422    @Override
4423    protected boolean verifyDrawable(Drawable who) {
4424        final boolean verified = super.verifyDrawable(who);
4425        if (!verified && mDrawables != null) {
4426            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4427                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4428                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4429        }
4430        return verified;
4431    }
4432
4433    @Override
4434    public void jumpDrawablesToCurrentState() {
4435        super.jumpDrawablesToCurrentState();
4436        if (mDrawables != null) {
4437            if (mDrawables.mDrawableLeft != null) {
4438                mDrawables.mDrawableLeft.jumpToCurrentState();
4439            }
4440            if (mDrawables.mDrawableTop != null) {
4441                mDrawables.mDrawableTop.jumpToCurrentState();
4442            }
4443            if (mDrawables.mDrawableRight != null) {
4444                mDrawables.mDrawableRight.jumpToCurrentState();
4445            }
4446            if (mDrawables.mDrawableBottom != null) {
4447                mDrawables.mDrawableBottom.jumpToCurrentState();
4448            }
4449            if (mDrawables.mDrawableStart != null) {
4450                mDrawables.mDrawableStart.jumpToCurrentState();
4451            }
4452            if (mDrawables.mDrawableEnd != null) {
4453                mDrawables.mDrawableEnd.jumpToCurrentState();
4454            }
4455        }
4456    }
4457
4458    @Override
4459    public void invalidateDrawable(Drawable drawable) {
4460        if (verifyDrawable(drawable)) {
4461            final Rect dirty = drawable.getBounds();
4462            int scrollX = mScrollX;
4463            int scrollY = mScrollY;
4464
4465            // IMPORTANT: The coordinates below are based on the coordinates computed
4466            // for each compound drawable in onDraw(). Make sure to update each section
4467            // accordingly.
4468            final TextView.Drawables drawables = mDrawables;
4469            if (drawables != null) {
4470                if (drawable == drawables.mDrawableLeft) {
4471                    final int compoundPaddingTop = getCompoundPaddingTop();
4472                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4473                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4474
4475                    scrollX += mPaddingLeft;
4476                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4477                } else if (drawable == drawables.mDrawableRight) {
4478                    final int compoundPaddingTop = getCompoundPaddingTop();
4479                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4480                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4481
4482                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4483                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4484                } else if (drawable == drawables.mDrawableTop) {
4485                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4486                    final int compoundPaddingRight = getCompoundPaddingRight();
4487                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4488
4489                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4490                    scrollY += mPaddingTop;
4491                } else if (drawable == drawables.mDrawableBottom) {
4492                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4493                    final int compoundPaddingRight = getCompoundPaddingRight();
4494                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4495
4496                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4497                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4498                }
4499            }
4500
4501            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4502                    dirty.right + scrollX, dirty.bottom + scrollY);
4503        }
4504    }
4505
4506    /**
4507     * @hide
4508     */
4509    @Override
4510    public int getResolvedLayoutDirection(Drawable who) {
4511        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4512        if (mDrawables != null) {
4513            final Drawables drawables = mDrawables;
4514            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4515                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4516                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4517                return getResolvedLayoutDirection();
4518            }
4519        }
4520        return super.getResolvedLayoutDirection(who);
4521    }
4522
4523    @Override
4524    protected boolean onSetAlpha(int alpha) {
4525        // Alpha is supported if and only if the drawing can be done in one pass.
4526        // TODO text with spans with a background color currently do not respect this alpha.
4527        if (getBackground() == null) {
4528            mCurrentAlpha = alpha;
4529            final Drawables dr = mDrawables;
4530            if (dr != null) {
4531                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4532                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4533                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4534                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4535                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4536                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4537            }
4538            return true;
4539        }
4540
4541        mCurrentAlpha = 255;
4542        return false;
4543    }
4544
4545    /**
4546     * When a TextView is used to display a useful piece of information to the user (such as a
4547     * contact's address), it should be made selectable, so that the user can select and copy this
4548     * content.
4549     *
4550     * Use {@link #setTextIsSelectable(boolean)} or the
4551     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4552     * selectable (text is not selectable by default).
4553     *
4554     * Note that this method simply returns the state of this flag. Although this flag has to be set
4555     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4556     * always be selected, independently of the value of this flag.
4557     *
4558     * @return True if the text displayed in this TextView can be selected by the user.
4559     *
4560     * @attr ref android.R.styleable#TextView_textIsSelectable
4561     */
4562    public boolean isTextSelectable() {
4563        return mTextIsSelectable;
4564    }
4565
4566    /**
4567     * Sets whether or not (default) the content of this view is selectable by the user.
4568     *
4569     * Note that this methods affect the {@link #setFocusable(boolean)},
4570     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4571     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4572     * customized.
4573     *
4574     * See {@link #isTextSelectable} for details.
4575     *
4576     * @param selectable Whether or not the content of this TextView should be selectable.
4577     */
4578    public void setTextIsSelectable(boolean selectable) {
4579        if (mTextIsSelectable == selectable) return;
4580
4581        mTextIsSelectable = selectable;
4582
4583        setFocusableInTouchMode(selectable);
4584        setFocusable(selectable);
4585        setClickable(selectable);
4586        setLongClickable(selectable);
4587
4588        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4589
4590        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4591        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4592
4593        // Called by setText above, but safer in case of future code changes
4594        prepareCursorControllers();
4595    }
4596
4597    @Override
4598    protected int[] onCreateDrawableState(int extraSpace) {
4599        final int[] drawableState;
4600
4601        if (mSingleLine) {
4602            drawableState = super.onCreateDrawableState(extraSpace);
4603        } else {
4604            drawableState = super.onCreateDrawableState(extraSpace + 1);
4605            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4606        }
4607
4608        if (mTextIsSelectable) {
4609            // Disable pressed state, which was introduced when TextView was made clickable.
4610            // Prevents text color change.
4611            // setClickable(false) would have a similar effect, but it also disables focus changes
4612            // and long press actions, which are both needed by text selection.
4613            final int length = drawableState.length;
4614            for (int i = 0; i < length; i++) {
4615                if (drawableState[i] == R.attr.state_pressed) {
4616                    final int[] nonPressedState = new int[length - 1];
4617                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4618                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4619                    return nonPressedState;
4620                }
4621            }
4622        }
4623
4624        return drawableState;
4625    }
4626
4627    @Override
4628    protected void onDraw(Canvas canvas) {
4629        if (mPreDrawState == PREDRAW_DONE) {
4630            final ViewTreeObserver observer = getViewTreeObserver();
4631            observer.removeOnPreDrawListener(this);
4632            mPreDrawState = PREDRAW_NOT_REGISTERED;
4633        }
4634
4635        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4636
4637        restartMarqueeIfNeeded();
4638
4639        // Draw the background for this view
4640        super.onDraw(canvas);
4641
4642        final int compoundPaddingLeft = getCompoundPaddingLeft();
4643        final int compoundPaddingTop = getCompoundPaddingTop();
4644        final int compoundPaddingRight = getCompoundPaddingRight();
4645        final int compoundPaddingBottom = getCompoundPaddingBottom();
4646        final int scrollX = mScrollX;
4647        final int scrollY = mScrollY;
4648        final int right = mRight;
4649        final int left = mLeft;
4650        final int bottom = mBottom;
4651        final int top = mTop;
4652
4653        final Drawables dr = mDrawables;
4654        if (dr != null) {
4655            /*
4656             * Compound, not extended, because the icon is not clipped
4657             * if the text height is smaller.
4658             */
4659
4660            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4661            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4662
4663            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4664            // Make sure to update invalidateDrawable() when changing this code.
4665            if (dr.mDrawableLeft != null) {
4666                canvas.save();
4667                canvas.translate(scrollX + mPaddingLeft,
4668                                 scrollY + compoundPaddingTop +
4669                                 (vspace - dr.mDrawableHeightLeft) / 2);
4670                dr.mDrawableLeft.draw(canvas);
4671                canvas.restore();
4672            }
4673
4674            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4675            // Make sure to update invalidateDrawable() when changing this code.
4676            if (dr.mDrawableRight != null) {
4677                canvas.save();
4678                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4679                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4680                dr.mDrawableRight.draw(canvas);
4681                canvas.restore();
4682            }
4683
4684            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4685            // Make sure to update invalidateDrawable() when changing this code.
4686            if (dr.mDrawableTop != null) {
4687                canvas.save();
4688                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4689                        scrollY + mPaddingTop);
4690                dr.mDrawableTop.draw(canvas);
4691                canvas.restore();
4692            }
4693
4694            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4695            // Make sure to update invalidateDrawable() when changing this code.
4696            if (dr.mDrawableBottom != null) {
4697                canvas.save();
4698                canvas.translate(scrollX + compoundPaddingLeft +
4699                        (hspace - dr.mDrawableWidthBottom) / 2,
4700                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4701                dr.mDrawableBottom.draw(canvas);
4702                canvas.restore();
4703            }
4704        }
4705
4706        int color = mCurTextColor;
4707
4708        if (mLayout == null) {
4709            assumeLayout();
4710        }
4711
4712        Layout layout = mLayout;
4713        int cursorcolor = color;
4714
4715        if (mHint != null && mText.length() == 0) {
4716            if (mHintTextColor != null) {
4717                color = mCurHintTextColor;
4718            }
4719
4720            layout = mHintLayout;
4721        }
4722
4723        mTextPaint.setColor(color);
4724        if (mCurrentAlpha != 255) {
4725            // If set, the alpha will override the color's alpha. Multiply the alphas.
4726            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4727        }
4728        mTextPaint.drawableState = getDrawableState();
4729
4730        canvas.save();
4731        /*  Would be faster if we didn't have to do this. Can we chop the
4732            (displayable) text so that we don't need to do this ever?
4733        */
4734
4735        int extendedPaddingTop = getExtendedPaddingTop();
4736        int extendedPaddingBottom = getExtendedPaddingBottom();
4737
4738        float clipLeft = compoundPaddingLeft + scrollX;
4739        float clipTop = extendedPaddingTop + scrollY;
4740        float clipRight = right - left - compoundPaddingRight + scrollX;
4741        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4742
4743        if (mShadowRadius != 0) {
4744            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4745            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4746
4747            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4748            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4749        }
4750
4751        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4752
4753        int voffsetText = 0;
4754        int voffsetCursor = 0;
4755
4756        // translate in by our padding
4757        {
4758            /* shortcircuit calling getVerticaOffset() */
4759            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4760                voffsetText = getVerticalOffset(false);
4761                voffsetCursor = getVerticalOffset(true);
4762            }
4763            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4764        }
4765
4766        final int layoutDirection = getResolvedLayoutDirection();
4767        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4768        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4769            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4770                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4771                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4772                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4773            }
4774
4775            if (mMarquee != null && mMarquee.isRunning()) {
4776                canvas.translate(-mMarquee.mScroll, 0.0f);
4777            }
4778        }
4779
4780        Path highlight = null;
4781        int selStart = -1, selEnd = -1;
4782        boolean drawCursor = false;
4783
4784        //  If there is no movement method, then there can be no selection.
4785        //  Check that first and attempt to skip everything having to do with
4786        //  the cursor.
4787        //  XXX This is not strictly true -- a program could set the
4788        //  selection manually if it really wanted to.
4789        if (mMovement != null && (isFocused() || isPressed())) {
4790            selStart = getSelectionStart();
4791            selEnd = getSelectionEnd();
4792
4793            if (selStart >= 0) {
4794                if (mHighlightPath == null)
4795                    mHighlightPath = new Path();
4796
4797                if (selStart == selEnd) {
4798                    if (isCursorVisible() &&
4799                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4800                        if (mHighlightPathBogus) {
4801                            mHighlightPath.reset();
4802                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4803                            updateCursorsPositions();
4804                            mHighlightPathBogus = false;
4805                        }
4806
4807                        // XXX should pass to skin instead of drawing directly
4808                        mHighlightPaint.setColor(cursorcolor);
4809                        if (mCurrentAlpha != 255) {
4810                            mHighlightPaint.setAlpha(
4811                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4812                        }
4813                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4814                        highlight = mHighlightPath;
4815                        drawCursor = mCursorCount > 0;
4816                    }
4817                } else if (textCanBeSelected()) {
4818                    if (mHighlightPathBogus) {
4819                        mHighlightPath.reset();
4820                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4821                        mHighlightPathBogus = false;
4822                    }
4823
4824                    // XXX should pass to skin instead of drawing directly
4825                    mHighlightPaint.setColor(mHighlightColor);
4826                    if (mCurrentAlpha != 255) {
4827                        mHighlightPaint.setAlpha(
4828                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4829                    }
4830                    mHighlightPaint.setStyle(Paint.Style.FILL);
4831
4832                    highlight = mHighlightPath;
4833                }
4834            }
4835        }
4836
4837        /*  Comment out until we decide what to do about animations
4838        boolean isLinearTextOn = false;
4839        if (currentTransformation != null) {
4840            isLinearTextOn = mTextPaint.isLinearTextOn();
4841            Matrix m = currentTransformation.getMatrix();
4842            if (!m.isIdentity()) {
4843                // mTextPaint.setLinearTextOn(true);
4844            }
4845        }
4846        */
4847
4848        final InputMethodState ims = mInputMethodState;
4849        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4850        if (ims != null && ims.mBatchEditNesting == 0) {
4851            InputMethodManager imm = InputMethodManager.peekInstance();
4852            if (imm != null) {
4853                if (imm.isActive(this)) {
4854                    boolean reported = false;
4855                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4856                        // We are in extract mode and the content has changed
4857                        // in some way... just report complete new text to the
4858                        // input method.
4859                        reported = reportExtractedText();
4860                    }
4861                    if (!reported && highlight != null) {
4862                        int candStart = -1;
4863                        int candEnd = -1;
4864                        if (mText instanceof Spannable) {
4865                            Spannable sp = (Spannable)mText;
4866                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4867                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4868                        }
4869                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4870                    }
4871                }
4872
4873                if (imm.isWatchingCursor(this) && highlight != null) {
4874                    highlight.computeBounds(ims.mTmpRectF, true);
4875                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4876
4877                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4878                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4879
4880                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4881
4882                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4883                            (int)(ims.mTmpRectF.top + 0.5),
4884                            (int)(ims.mTmpRectF.right + 0.5),
4885                            (int)(ims.mTmpRectF.bottom + 0.5));
4886
4887                    imm.updateCursor(this,
4888                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4889                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4890                }
4891            }
4892        }
4893
4894        if (mCorrectionHighlighter != null) {
4895            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4896        }
4897
4898        if (drawCursor) {
4899            drawCursor(canvas, cursorOffsetVertical);
4900            // Rely on the drawable entirely, do not draw the cursor line.
4901            // Has to be done after the IMM related code above which relies on the highlight.
4902            highlight = null;
4903        }
4904
4905        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4906
4907        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4908            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4909            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4910        }
4911
4912        /*  Comment out until we decide what to do about animations
4913        if (currentTransformation != null) {
4914            mTextPaint.setLinearTextOn(isLinearTextOn);
4915        }
4916        */
4917
4918        canvas.restore();
4919    }
4920
4921    private void updateCursorsPositions() {
4922        if (mCursorDrawableRes == 0) {
4923            mCursorCount = 0;
4924            return;
4925        }
4926
4927        final int offset = getSelectionStart();
4928        final int line = mLayout.getLineForOffset(offset);
4929        final int top = mLayout.getLineTop(line);
4930        final int bottom = mLayout.getLineTop(line + 1);
4931
4932        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4933
4934        int middle = bottom;
4935        if (mCursorCount == 2) {
4936            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4937            middle = (top + bottom) >> 1;
4938        }
4939
4940        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4941
4942        if (mCursorCount == 2) {
4943            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4944        }
4945    }
4946
4947    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4948        if (mCursorDrawable[cursorIndex] == null)
4949            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4950
4951        if (mTempRect == null) mTempRect = new Rect();
4952
4953        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4954        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4955        horizontal = Math.max(0.5f, horizontal - 0.5f);
4956        final int left = (int) (horizontal) - mTempRect.left;
4957        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4958                bottom + mTempRect.bottom);
4959    }
4960
4961    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4962        final boolean translate = cursorOffsetVertical != 0;
4963        if (translate) canvas.translate(0, cursorOffsetVertical);
4964        for (int i = 0; i < mCursorCount; i++) {
4965            mCursorDrawable[i].draw(canvas);
4966        }
4967        if (translate) canvas.translate(0, -cursorOffsetVertical);
4968    }
4969
4970    @Override
4971    public void getFocusedRect(Rect r) {
4972        if (mLayout == null) {
4973            super.getFocusedRect(r);
4974            return;
4975        }
4976
4977        int selEnd = getSelectionEnd();
4978        if (selEnd < 0) {
4979            super.getFocusedRect(r);
4980            return;
4981        }
4982
4983        int selStart = getSelectionStart();
4984        if (selStart < 0 || selStart >= selEnd) {
4985            int line = mLayout.getLineForOffset(selEnd);
4986            r.top = mLayout.getLineTop(line);
4987            r.bottom = mLayout.getLineBottom(line);
4988            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
4989            r.right = r.left + 4;
4990        } else {
4991            int lineStart = mLayout.getLineForOffset(selStart);
4992            int lineEnd = mLayout.getLineForOffset(selEnd);
4993            r.top = mLayout.getLineTop(lineStart);
4994            r.bottom = mLayout.getLineBottom(lineEnd);
4995            if (lineStart == lineEnd) {
4996                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
4997                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
4998            } else {
4999                // Selection extends across multiple lines -- the focused
5000                // rect covers the entire width.
5001                if (mHighlightPathBogus) {
5002                    mHighlightPath.reset();
5003                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5004                    mHighlightPathBogus = false;
5005                }
5006                synchronized (sTempRect) {
5007                    mHighlightPath.computeBounds(sTempRect, true);
5008                    r.left = (int)sTempRect.left-1;
5009                    r.right = (int)sTempRect.right+1;
5010                }
5011            }
5012        }
5013
5014        // Adjust for padding and gravity.
5015        int paddingLeft = getCompoundPaddingLeft();
5016        int paddingTop = getExtendedPaddingTop();
5017        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5018            paddingTop += getVerticalOffset(false);
5019        }
5020        r.offset(paddingLeft, paddingTop);
5021    }
5022
5023    /**
5024     * Return the number of lines of text, or 0 if the internal Layout has not
5025     * been built.
5026     */
5027    public int getLineCount() {
5028        return mLayout != null ? mLayout.getLineCount() : 0;
5029    }
5030
5031    /**
5032     * Return the baseline for the specified line (0...getLineCount() - 1)
5033     * If bounds is not null, return the top, left, right, bottom extents
5034     * of the specified line in it. If the internal Layout has not been built,
5035     * return 0 and set bounds to (0, 0, 0, 0)
5036     * @param line which line to examine (0..getLineCount() - 1)
5037     * @param bounds Optional. If not null, it returns the extent of the line
5038     * @return the Y-coordinate of the baseline
5039     */
5040    public int getLineBounds(int line, Rect bounds) {
5041        if (mLayout == null) {
5042            if (bounds != null) {
5043                bounds.set(0, 0, 0, 0);
5044            }
5045            return 0;
5046        }
5047        else {
5048            int baseline = mLayout.getLineBounds(line, bounds);
5049
5050            int voffset = getExtendedPaddingTop();
5051            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5052                voffset += getVerticalOffset(true);
5053            }
5054            if (bounds != null) {
5055                bounds.offset(getCompoundPaddingLeft(), voffset);
5056            }
5057            return baseline + voffset;
5058        }
5059    }
5060
5061    @Override
5062    public int getBaseline() {
5063        if (mLayout == null) {
5064            return super.getBaseline();
5065        }
5066
5067        int voffset = 0;
5068        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5069            voffset = getVerticalOffset(true);
5070        }
5071
5072        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5073    }
5074
5075    /**
5076     * @hide
5077     * @param offsetRequired
5078     */
5079    @Override
5080    protected int getFadeTop(boolean offsetRequired) {
5081        if (mLayout == null) return 0;
5082
5083        int voffset = 0;
5084        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5085            voffset = getVerticalOffset(true);
5086        }
5087
5088        if (offsetRequired) voffset += getTopPaddingOffset();
5089
5090        return getExtendedPaddingTop() + voffset;
5091    }
5092
5093    /**
5094     * @hide
5095     * @param offsetRequired
5096     */
5097    @Override
5098    protected int getFadeHeight(boolean offsetRequired) {
5099        return mLayout != null ? mLayout.getHeight() : 0;
5100    }
5101
5102    @Override
5103    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5104        if (keyCode == KeyEvent.KEYCODE_BACK) {
5105            boolean areSuggestionsShown = areSuggestionsShown();
5106            boolean isInSelectionMode = mSelectionActionMode != null;
5107
5108            if (areSuggestionsShown || isInSelectionMode) {
5109                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5110                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5111                    if (state != null) {
5112                        state.startTracking(event, this);
5113                    }
5114                    return true;
5115                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5116                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5117                    if (state != null) {
5118                        state.handleUpEvent(event);
5119                    }
5120                    if (event.isTracking() && !event.isCanceled()) {
5121                        if (areSuggestionsShown) {
5122                            hideSuggestions();
5123                            return true;
5124                        }
5125                        if (isInSelectionMode) {
5126                            stopSelectionActionMode();
5127                            return true;
5128                        }
5129                    }
5130                }
5131            }
5132        }
5133        return super.onKeyPreIme(keyCode, event);
5134    }
5135
5136    @Override
5137    public boolean onKeyDown(int keyCode, KeyEvent event) {
5138        int which = doKeyDown(keyCode, event, null);
5139        if (which == 0) {
5140            // Go through default dispatching.
5141            return super.onKeyDown(keyCode, event);
5142        }
5143
5144        return true;
5145    }
5146
5147    @Override
5148    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5149        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5150
5151        int which = doKeyDown(keyCode, down, event);
5152        if (which == 0) {
5153            // Go through default dispatching.
5154            return super.onKeyMultiple(keyCode, repeatCount, event);
5155        }
5156        if (which == -1) {
5157            // Consumed the whole thing.
5158            return true;
5159        }
5160
5161        repeatCount--;
5162
5163        // We are going to dispatch the remaining events to either the input
5164        // or movement method.  To do this, we will just send a repeated stream
5165        // of down and up events until we have done the complete repeatCount.
5166        // It would be nice if those interfaces had an onKeyMultiple() method,
5167        // but adding that is a more complicated change.
5168        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5169        if (which == 1) {
5170            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5171            while (--repeatCount > 0) {
5172                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5173                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5174            }
5175            hideErrorIfUnchanged();
5176
5177        } else if (which == 2) {
5178            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5179            while (--repeatCount > 0) {
5180                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5181                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5182            }
5183        }
5184
5185        return true;
5186    }
5187
5188    /**
5189     * Returns true if pressing ENTER in this field advances focus instead
5190     * of inserting the character.  This is true mostly in single-line fields,
5191     * but also in mail addresses and subjects which will display on multiple
5192     * lines but where it doesn't make sense to insert newlines.
5193     */
5194    private boolean shouldAdvanceFocusOnEnter() {
5195        if (mInput == null) {
5196            return false;
5197        }
5198
5199        if (mSingleLine) {
5200            return true;
5201        }
5202
5203        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5204            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5205            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5206                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5207                return true;
5208            }
5209        }
5210
5211        return false;
5212    }
5213
5214    /**
5215     * Returns true if pressing TAB in this field advances focus instead
5216     * of inserting the character.  Insert tabs only in multi-line editors.
5217     */
5218    private boolean shouldAdvanceFocusOnTab() {
5219        if (mInput != null && !mSingleLine) {
5220            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5221                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5222                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5223                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5224                    return false;
5225                }
5226            }
5227        }
5228        return true;
5229    }
5230
5231    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5232        if (!isEnabled()) {
5233            return 0;
5234        }
5235
5236        switch (keyCode) {
5237            case KeyEvent.KEYCODE_ENTER:
5238                mEnterKeyIsDown = true;
5239                if (event.hasNoModifiers()) {
5240                    // When mInputContentType is set, we know that we are
5241                    // running in a "modern" cupcake environment, so don't need
5242                    // to worry about the application trying to capture
5243                    // enter key events.
5244                    if (mInputContentType != null) {
5245                        // If there is an action listener, given them a
5246                        // chance to consume the event.
5247                        if (mInputContentType.onEditorActionListener != null &&
5248                                mInputContentType.onEditorActionListener.onEditorAction(
5249                                this, EditorInfo.IME_NULL, event)) {
5250                            mInputContentType.enterDown = true;
5251                            // We are consuming the enter key for them.
5252                            return -1;
5253                        }
5254                    }
5255
5256                    // If our editor should move focus when enter is pressed, or
5257                    // this is a generated event from an IME action button, then
5258                    // don't let it be inserted into the text.
5259                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5260                            || shouldAdvanceFocusOnEnter()) {
5261                        if (mOnClickListener != null) {
5262                            return 0;
5263                        }
5264                        return -1;
5265                    }
5266                }
5267                break;
5268
5269            case KeyEvent.KEYCODE_DPAD_CENTER:
5270                mDPadCenterIsDown = true;
5271                if (event.hasNoModifiers()) {
5272                    if (shouldAdvanceFocusOnEnter()) {
5273                        return 0;
5274                    }
5275                }
5276                break;
5277
5278            case KeyEvent.KEYCODE_TAB:
5279                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5280                    if (shouldAdvanceFocusOnTab()) {
5281                        return 0;
5282                    }
5283                }
5284                break;
5285
5286                // Has to be done on key down (and not on key up) to correctly be intercepted.
5287            case KeyEvent.KEYCODE_BACK:
5288                if (areSuggestionsShown()) {
5289                    hideSuggestions();
5290                    return -1;
5291                }
5292                if (mSelectionActionMode != null) {
5293                    stopSelectionActionMode();
5294                    return -1;
5295                }
5296                break;
5297        }
5298
5299        if (mInput != null) {
5300            resetErrorChangedFlag();
5301
5302            boolean doDown = true;
5303            if (otherEvent != null) {
5304                try {
5305                    beginBatchEdit();
5306                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5307                    hideErrorIfUnchanged();
5308                    doDown = false;
5309                    if (handled) {
5310                        return -1;
5311                    }
5312                } catch (AbstractMethodError e) {
5313                    // onKeyOther was added after 1.0, so if it isn't
5314                    // implemented we need to try to dispatch as a regular down.
5315                } finally {
5316                    endBatchEdit();
5317                }
5318            }
5319
5320            if (doDown) {
5321                beginBatchEdit();
5322                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5323                endBatchEdit();
5324                hideErrorIfUnchanged();
5325                if (handled) return 1;
5326            }
5327        }
5328
5329        // bug 650865: sometimes we get a key event before a layout.
5330        // don't try to move around if we don't know the layout.
5331
5332        if (mMovement != null && mLayout != null) {
5333            boolean doDown = true;
5334            if (otherEvent != null) {
5335                try {
5336                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5337                            otherEvent);
5338                    doDown = false;
5339                    if (handled) {
5340                        return -1;
5341                    }
5342                } catch (AbstractMethodError e) {
5343                    // onKeyOther was added after 1.0, so if it isn't
5344                    // implemented we need to try to dispatch as a regular down.
5345                }
5346            }
5347            if (doDown) {
5348                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5349                    return 2;
5350            }
5351        }
5352
5353        return 0;
5354    }
5355
5356    /**
5357     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5358     * can be recorded.
5359     * @hide
5360     */
5361    public void resetErrorChangedFlag() {
5362        /*
5363         * Keep track of what the error was before doing the input
5364         * so that if an input filter changed the error, we leave
5365         * that error showing.  Otherwise, we take down whatever
5366         * error was showing when the user types something.
5367         */
5368        mErrorWasChanged = false;
5369    }
5370
5371    /**
5372     * @hide
5373     */
5374    public void hideErrorIfUnchanged() {
5375        if (mError != null && !mErrorWasChanged) {
5376            setError(null, null);
5377        }
5378    }
5379
5380    @Override
5381    public boolean onKeyUp(int keyCode, KeyEvent event) {
5382        if (!isEnabled()) {
5383            return super.onKeyUp(keyCode, event);
5384        }
5385
5386        switch (keyCode) {
5387            case KeyEvent.KEYCODE_DPAD_CENTER:
5388                mDPadCenterIsDown = false;
5389                if (event.hasNoModifiers()) {
5390                    /*
5391                     * If there is a click listener, just call through to
5392                     * super, which will invoke it.
5393                     *
5394                     * If there isn't a click listener, try to show the soft
5395                     * input method.  (It will also
5396                     * call performClick(), but that won't do anything in
5397                     * this case.)
5398                     */
5399                    if (mOnClickListener == null) {
5400                        if (mMovement != null && mText instanceof Editable
5401                                && mLayout != null && onCheckIsTextEditor()) {
5402                            InputMethodManager imm = InputMethodManager.peekInstance();
5403                            if (imm != null) {
5404                                imm.viewClicked(this);
5405                                imm.showSoftInput(this, 0);
5406                            }
5407                        }
5408                    }
5409                }
5410                return super.onKeyUp(keyCode, event);
5411
5412            case KeyEvent.KEYCODE_ENTER:
5413                mEnterKeyIsDown = false;
5414                if (event.hasNoModifiers()) {
5415                    if (mInputContentType != null
5416                            && mInputContentType.onEditorActionListener != null
5417                            && mInputContentType.enterDown) {
5418                        mInputContentType.enterDown = false;
5419                        if (mInputContentType.onEditorActionListener.onEditorAction(
5420                                this, EditorInfo.IME_NULL, event)) {
5421                            return true;
5422                        }
5423                    }
5424
5425                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5426                            || shouldAdvanceFocusOnEnter()) {
5427                        /*
5428                         * If there is a click listener, just call through to
5429                         * super, which will invoke it.
5430                         *
5431                         * If there isn't a click listener, try to advance focus,
5432                         * but still call through to super, which will reset the
5433                         * pressed state and longpress state.  (It will also
5434                         * call performClick(), but that won't do anything in
5435                         * this case.)
5436                         */
5437                        if (mOnClickListener == null) {
5438                            View v = focusSearch(FOCUS_DOWN);
5439
5440                            if (v != null) {
5441                                if (!v.requestFocus(FOCUS_DOWN)) {
5442                                    throw new IllegalStateException(
5443                                            "focus search returned a view " +
5444                                            "that wasn't able to take focus!");
5445                                }
5446
5447                                /*
5448                                 * Return true because we handled the key; super
5449                                 * will return false because there was no click
5450                                 * listener.
5451                                 */
5452                                super.onKeyUp(keyCode, event);
5453                                return true;
5454                            } else if ((event.getFlags()
5455                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5456                                // No target for next focus, but make sure the IME
5457                                // if this came from it.
5458                                InputMethodManager imm = InputMethodManager.peekInstance();
5459                                if (imm != null && imm.isActive(this)) {
5460                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5461                                }
5462                            }
5463                        }
5464                    }
5465                    return super.onKeyUp(keyCode, event);
5466                }
5467                break;
5468        }
5469
5470        if (mInput != null)
5471            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5472                return true;
5473
5474        if (mMovement != null && mLayout != null)
5475            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5476                return true;
5477
5478        return super.onKeyUp(keyCode, event);
5479    }
5480
5481    @Override public boolean onCheckIsTextEditor() {
5482        return mInputType != EditorInfo.TYPE_NULL;
5483    }
5484
5485    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5486        if (onCheckIsTextEditor() && isEnabled()) {
5487            if (mInputMethodState == null) {
5488                mInputMethodState = new InputMethodState();
5489            }
5490            outAttrs.inputType = mInputType;
5491            if (mInputContentType != null) {
5492                outAttrs.imeOptions = mInputContentType.imeOptions;
5493                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5494                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5495                outAttrs.actionId = mInputContentType.imeActionId;
5496                outAttrs.extras = mInputContentType.extras;
5497            } else {
5498                outAttrs.imeOptions = EditorInfo.IME_NULL;
5499            }
5500            if (focusSearch(FOCUS_DOWN) != null) {
5501                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5502            }
5503            if (focusSearch(FOCUS_UP) != null) {
5504                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5505            }
5506            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5507                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5508                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5509                    // An action has not been set, but the enter key will move to
5510                    // the next focus, so set the action to that.
5511                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5512                } else {
5513                    // An action has not been set, and there is no focus to move
5514                    // to, so let's just supply a "done" action.
5515                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5516                }
5517                if (!shouldAdvanceFocusOnEnter()) {
5518                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5519                }
5520            }
5521            if (isMultilineInputType(outAttrs.inputType)) {
5522                // Multi-line text editors should always show an enter key.
5523                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5524            }
5525            outAttrs.hintText = mHint;
5526            if (mText instanceof Editable) {
5527                InputConnection ic = new EditableInputConnection(this);
5528                outAttrs.initialSelStart = getSelectionStart();
5529                outAttrs.initialSelEnd = getSelectionEnd();
5530                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5531                return ic;
5532            }
5533        }
5534        return null;
5535    }
5536
5537    /**
5538     * If this TextView contains editable content, extract a portion of it
5539     * based on the information in <var>request</var> in to <var>outText</var>.
5540     * @return Returns true if the text was successfully extracted, else false.
5541     */
5542    public boolean extractText(ExtractedTextRequest request,
5543            ExtractedText outText) {
5544        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5545                EXTRACT_UNKNOWN, outText);
5546    }
5547
5548    static final int EXTRACT_NOTHING = -2;
5549    static final int EXTRACT_UNKNOWN = -1;
5550
5551    boolean extractTextInternal(ExtractedTextRequest request,
5552            int partialStartOffset, int partialEndOffset, int delta,
5553            ExtractedText outText) {
5554        final CharSequence content = mText;
5555        if (content != null) {
5556            if (partialStartOffset != EXTRACT_NOTHING) {
5557                final int N = content.length();
5558                if (partialStartOffset < 0) {
5559                    outText.partialStartOffset = outText.partialEndOffset = -1;
5560                    partialStartOffset = 0;
5561                    partialEndOffset = N;
5562                } else {
5563                    // Now use the delta to determine the actual amount of text
5564                    // we need.
5565                    partialEndOffset += delta;
5566                    // Adjust offsets to ensure we contain full spans.
5567                    if (content instanceof Spanned) {
5568                        Spanned spanned = (Spanned)content;
5569                        Object[] spans = spanned.getSpans(partialStartOffset,
5570                                partialEndOffset, ParcelableSpan.class);
5571                        int i = spans.length;
5572                        while (i > 0) {
5573                            i--;
5574                            int j = spanned.getSpanStart(spans[i]);
5575                            if (j < partialStartOffset) partialStartOffset = j;
5576                            j = spanned.getSpanEnd(spans[i]);
5577                            if (j > partialEndOffset) partialEndOffset = j;
5578                        }
5579                    }
5580                    outText.partialStartOffset = partialStartOffset;
5581                    outText.partialEndOffset = partialEndOffset - delta;
5582
5583                    if (partialStartOffset > N) {
5584                        partialStartOffset = N;
5585                    } else if (partialStartOffset < 0) {
5586                        partialStartOffset = 0;
5587                    }
5588                    if (partialEndOffset > N) {
5589                        partialEndOffset = N;
5590                    } else if (partialEndOffset < 0) {
5591                        partialEndOffset = 0;
5592                    }
5593                }
5594                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5595                    outText.text = content.subSequence(partialStartOffset,
5596                            partialEndOffset);
5597                } else {
5598                    outText.text = TextUtils.substring(content, partialStartOffset,
5599                            partialEndOffset);
5600                }
5601            } else {
5602                outText.partialStartOffset = 0;
5603                outText.partialEndOffset = 0;
5604                outText.text = "";
5605            }
5606            outText.flags = 0;
5607            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5608                outText.flags |= ExtractedText.FLAG_SELECTING;
5609            }
5610            if (mSingleLine) {
5611                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5612            }
5613            outText.startOffset = 0;
5614            outText.selectionStart = getSelectionStart();
5615            outText.selectionEnd = getSelectionEnd();
5616            return true;
5617        }
5618        return false;
5619    }
5620
5621    boolean reportExtractedText() {
5622        final InputMethodState ims = mInputMethodState;
5623        if (ims != null) {
5624            final boolean contentChanged = ims.mContentChanged;
5625            if (contentChanged || ims.mSelectionModeChanged) {
5626                ims.mContentChanged = false;
5627                ims.mSelectionModeChanged = false;
5628                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5629                if (req != null) {
5630                    InputMethodManager imm = InputMethodManager.peekInstance();
5631                    if (imm != null) {
5632                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5633                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5634                                + " delta=" + ims.mChangedDelta);
5635                        if (ims.mChangedStart < 0 && !contentChanged) {
5636                            ims.mChangedStart = EXTRACT_NOTHING;
5637                        }
5638                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5639                                ims.mChangedDelta, ims.mTmpExtracted)) {
5640                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5641                                    + ims.mTmpExtracted.partialStartOffset
5642                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5643                                    + ": " + ims.mTmpExtracted.text);
5644                            imm.updateExtractedText(this, req.token,
5645                                    mInputMethodState.mTmpExtracted);
5646                            ims.mChangedStart = EXTRACT_UNKNOWN;
5647                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5648                            ims.mChangedDelta = 0;
5649                            ims.mContentChanged = false;
5650                            return true;
5651                        }
5652                    }
5653                }
5654            }
5655        }
5656        return false;
5657    }
5658
5659    /**
5660     * This is used to remove all style-impacting spans from text before new
5661     * extracted text is being replaced into it, so that we don't have any
5662     * lingering spans applied during the replace.
5663     */
5664    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5665        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5666        int i = spans.length;
5667        while (i > 0) {
5668            i--;
5669            spannable.removeSpan(spans[i]);
5670        }
5671    }
5672
5673    /**
5674     * Apply to this text view the given extracted text, as previously
5675     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5676     */
5677    public void setExtractedText(ExtractedText text) {
5678        Editable content = getEditableText();
5679        if (text.text != null) {
5680            if (content == null) {
5681                setText(text.text, TextView.BufferType.EDITABLE);
5682            } else if (text.partialStartOffset < 0) {
5683                removeParcelableSpans(content, 0, content.length());
5684                content.replace(0, content.length(), text.text);
5685            } else {
5686                final int N = content.length();
5687                int start = text.partialStartOffset;
5688                if (start > N) start = N;
5689                int end = text.partialEndOffset;
5690                if (end > N) end = N;
5691                removeParcelableSpans(content, start, end);
5692                content.replace(start, end, text.text);
5693            }
5694        }
5695
5696        // Now set the selection position...  make sure it is in range, to
5697        // avoid crashes.  If this is a partial update, it is possible that
5698        // the underlying text may have changed, causing us problems here.
5699        // Also we just don't want to trust clients to do the right thing.
5700        Spannable sp = (Spannable)getText();
5701        final int N = sp.length();
5702        int start = text.selectionStart;
5703        if (start < 0) start = 0;
5704        else if (start > N) start = N;
5705        int end = text.selectionEnd;
5706        if (end < 0) end = 0;
5707        else if (end > N) end = N;
5708        Selection.setSelection(sp, start, end);
5709
5710        // Finally, update the selection mode.
5711        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5712            MetaKeyKeyListener.startSelecting(this, sp);
5713        } else {
5714            MetaKeyKeyListener.stopSelecting(this, sp);
5715        }
5716    }
5717
5718    /**
5719     * @hide
5720     */
5721    public void setExtracting(ExtractedTextRequest req) {
5722        if (mInputMethodState != null) {
5723            mInputMethodState.mExtracting = req;
5724        }
5725        // This stops a possible text selection mode. Maybe not intended.
5726        hideControllers();
5727    }
5728
5729    /**
5730     * Called by the framework in response to a text completion from
5731     * the current input method, provided by it calling
5732     * {@link InputConnection#commitCompletion
5733     * InputConnection.commitCompletion()}.  The default implementation does
5734     * nothing; text views that are supporting auto-completion should override
5735     * this to do their desired behavior.
5736     *
5737     * @param text The auto complete text the user has selected.
5738     */
5739    public void onCommitCompletion(CompletionInfo text) {
5740        // intentionally empty
5741    }
5742
5743    /**
5744     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5745     * a dictionnary) from the current input method, provided by it calling
5746     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5747     * implementation flashes the background of the corrected word to provide feedback to the user.
5748     *
5749     * @param info The auto correct info about the text that was corrected.
5750     */
5751    public void onCommitCorrection(CorrectionInfo info) {
5752        if (mCorrectionHighlighter == null) {
5753            mCorrectionHighlighter = new CorrectionHighlighter();
5754        } else {
5755            mCorrectionHighlighter.invalidate(false);
5756        }
5757
5758        mCorrectionHighlighter.highlight(info);
5759    }
5760
5761    private class CorrectionHighlighter {
5762        private final Path mPath = new Path();
5763        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5764        private int mStart, mEnd;
5765        private long mFadingStartTime;
5766        private final static int FADE_OUT_DURATION = 400;
5767
5768        public CorrectionHighlighter() {
5769            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5770            mPaint.setStyle(Paint.Style.FILL);
5771        }
5772
5773        public void highlight(CorrectionInfo info) {
5774            mStart = info.getOffset();
5775            mEnd = mStart + info.getNewText().length();
5776            mFadingStartTime = SystemClock.uptimeMillis();
5777
5778            if (mStart < 0 || mEnd < 0) {
5779                stopAnimation();
5780            }
5781        }
5782
5783        public void draw(Canvas canvas, int cursorOffsetVertical) {
5784            if (updatePath() && updatePaint()) {
5785                if (cursorOffsetVertical != 0) {
5786                    canvas.translate(0, cursorOffsetVertical);
5787                }
5788
5789                canvas.drawPath(mPath, mPaint);
5790
5791                if (cursorOffsetVertical != 0) {
5792                    canvas.translate(0, -cursorOffsetVertical);
5793                }
5794                invalidate(true);
5795            } else {
5796                stopAnimation();
5797                invalidate(false);
5798            }
5799        }
5800
5801        private boolean updatePaint() {
5802            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5803            if (duration > FADE_OUT_DURATION) return false;
5804
5805            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5806            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5807            final int color = (mHighlightColor & 0x00FFFFFF) +
5808                    ((int) (highlightColorAlpha * coef) << 24);
5809            mPaint.setColor(color);
5810            return true;
5811        }
5812
5813        private boolean updatePath() {
5814            final Layout layout = TextView.this.mLayout;
5815            if (layout == null) return false;
5816
5817            // Update in case text is edited while the animation is run
5818            final int length = mText.length();
5819            int start = Math.min(length, mStart);
5820            int end = Math.min(length, mEnd);
5821
5822            mPath.reset();
5823            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5824            return true;
5825        }
5826
5827        private void invalidate(boolean delayed) {
5828            if (TextView.this.mLayout == null) return;
5829
5830            synchronized (sTempRect) {
5831                mPath.computeBounds(sTempRect, false);
5832
5833                int left = getCompoundPaddingLeft();
5834                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5835
5836                if (delayed) {
5837                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5838                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5839                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5840                } else {
5841                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5842                            (int) sTempRect.right, (int) sTempRect.bottom);
5843                }
5844            }
5845        }
5846
5847        private void stopAnimation() {
5848            TextView.this.mCorrectionHighlighter = null;
5849        }
5850    }
5851
5852    public void beginBatchEdit() {
5853        mInBatchEditControllers = true;
5854        final InputMethodState ims = mInputMethodState;
5855        if (ims != null) {
5856            int nesting = ++ims.mBatchEditNesting;
5857            if (nesting == 1) {
5858                ims.mCursorChanged = false;
5859                ims.mChangedDelta = 0;
5860                if (ims.mContentChanged) {
5861                    // We already have a pending change from somewhere else,
5862                    // so turn this into a full update.
5863                    ims.mChangedStart = 0;
5864                    ims.mChangedEnd = mText.length();
5865                } else {
5866                    ims.mChangedStart = EXTRACT_UNKNOWN;
5867                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5868                    ims.mContentChanged = false;
5869                }
5870                onBeginBatchEdit();
5871            }
5872        }
5873    }
5874
5875    public void endBatchEdit() {
5876        mInBatchEditControllers = false;
5877        final InputMethodState ims = mInputMethodState;
5878        if (ims != null) {
5879            int nesting = --ims.mBatchEditNesting;
5880            if (nesting == 0) {
5881                finishBatchEdit(ims);
5882            }
5883        }
5884    }
5885
5886    void ensureEndedBatchEdit() {
5887        final InputMethodState ims = mInputMethodState;
5888        if (ims != null && ims.mBatchEditNesting != 0) {
5889            ims.mBatchEditNesting = 0;
5890            finishBatchEdit(ims);
5891        }
5892    }
5893
5894    void finishBatchEdit(final InputMethodState ims) {
5895        onEndBatchEdit();
5896
5897        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5898            updateAfterEdit();
5899            reportExtractedText();
5900        } else if (ims.mCursorChanged) {
5901            // Cheezy way to get us to report the current cursor location.
5902            invalidateCursor();
5903        }
5904    }
5905
5906    void updateAfterEdit() {
5907        invalidate();
5908        int curs = getSelectionStart();
5909
5910        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5911            registerForPreDraw();
5912        }
5913
5914        if (curs >= 0) {
5915            mHighlightPathBogus = true;
5916            makeBlink();
5917            bringPointIntoView(curs);
5918        }
5919
5920        checkForResize();
5921    }
5922
5923    /**
5924     * Called by the framework in response to a request to begin a batch
5925     * of edit operations through a call to link {@link #beginBatchEdit()}.
5926     */
5927    public void onBeginBatchEdit() {
5928        // intentionally empty
5929    }
5930
5931    /**
5932     * Called by the framework in response to a request to end a batch
5933     * of edit operations through a call to link {@link #endBatchEdit}.
5934     */
5935    public void onEndBatchEdit() {
5936        // intentionally empty
5937    }
5938
5939    /**
5940     * Called by the framework in response to a private command from the
5941     * current method, provided by it calling
5942     * {@link InputConnection#performPrivateCommand
5943     * InputConnection.performPrivateCommand()}.
5944     *
5945     * @param action The action name of the command.
5946     * @param data Any additional data for the command.  This may be null.
5947     * @return Return true if you handled the command, else false.
5948     */
5949    public boolean onPrivateIMECommand(String action, Bundle data) {
5950        return false;
5951    }
5952
5953    private void nullLayouts() {
5954        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5955            mSavedLayout = (BoringLayout) mLayout;
5956        }
5957        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5958            mSavedHintLayout = (BoringLayout) mHintLayout;
5959        }
5960
5961        mLayout = mHintLayout = null;
5962
5963        // Since it depends on the value of mLayout
5964        prepareCursorControllers();
5965    }
5966
5967    /**
5968     * Make a new Layout based on the already-measured size of the view,
5969     * on the assumption that it was measured correctly at some point.
5970     */
5971    private void assumeLayout() {
5972        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5973
5974        if (width < 1) {
5975            width = 0;
5976        }
5977
5978        int physicalWidth = width;
5979
5980        if (mHorizontallyScrolling) {
5981            width = VERY_WIDE;
5982        }
5983
5984        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5985                      physicalWidth, false);
5986    }
5987
5988    @Override
5989    protected void resetResolvedLayoutDirection() {
5990        super.resetResolvedLayoutDirection();
5991
5992        if (mLayoutAlignment != null &&
5993                (mTextAlign == TextAlign.VIEW_START ||
5994                mTextAlign == TextAlign.VIEW_END)) {
5995            mLayoutAlignment = null;
5996        }
5997    }
5998
5999    private Layout.Alignment getLayoutAlignment() {
6000        if (mLayoutAlignment == null) {
6001            Layout.Alignment alignment;
6002            TextAlign textAlign = mTextAlign;
6003            switch (textAlign) {
6004                case INHERIT:
6005                    // fall through to gravity temporarily
6006                    // intention is to inherit value through view hierarchy.
6007                case GRAVITY:
6008                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6009                        case Gravity.START:
6010                            alignment = Layout.Alignment.ALIGN_NORMAL;
6011                            break;
6012                        case Gravity.END:
6013                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6014                            break;
6015                        case Gravity.LEFT:
6016                            alignment = Layout.Alignment.ALIGN_LEFT;
6017                            break;
6018                        case Gravity.RIGHT:
6019                            alignment = Layout.Alignment.ALIGN_RIGHT;
6020                            break;
6021                        case Gravity.CENTER_HORIZONTAL:
6022                            alignment = Layout.Alignment.ALIGN_CENTER;
6023                            break;
6024                        default:
6025                            alignment = Layout.Alignment.ALIGN_NORMAL;
6026                            break;
6027                    }
6028                    break;
6029                case TEXT_START:
6030                    alignment = Layout.Alignment.ALIGN_NORMAL;
6031                    break;
6032                case TEXT_END:
6033                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6034                    break;
6035                case CENTER:
6036                    alignment = Layout.Alignment.ALIGN_CENTER;
6037                    break;
6038                case VIEW_START:
6039                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6040                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6041                    break;
6042                case VIEW_END:
6043                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6044                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6045                    break;
6046                default:
6047                    alignment = Layout.Alignment.ALIGN_NORMAL;
6048                    break;
6049            }
6050            mLayoutAlignment = alignment;
6051        }
6052        return mLayoutAlignment;
6053    }
6054
6055    /**
6056     * The width passed in is now the desired layout width,
6057     * not the full view width with padding.
6058     * {@hide}
6059     */
6060    protected void makeNewLayout(int w, int hintWidth,
6061                                 BoringLayout.Metrics boring,
6062                                 BoringLayout.Metrics hintBoring,
6063                                 int ellipsisWidth, boolean bringIntoView) {
6064        stopMarquee();
6065
6066        // Update "old" cached values
6067        mOldMaximum = mMaximum;
6068        mOldMaxMode = mMaxMode;
6069
6070        mHighlightPathBogus = true;
6071
6072        if (w < 0) {
6073            w = 0;
6074        }
6075        if (hintWidth < 0) {
6076            hintWidth = 0;
6077        }
6078
6079        Layout.Alignment alignment = getLayoutAlignment();
6080        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6081
6082        if (mTextDir == null) {
6083            resolveTextDirection();
6084        }
6085        if (mText instanceof Spannable) {
6086            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
6087                    alignment, mTextDir, mSpacingMult,
6088                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
6089                    ellipsisWidth);
6090        } else {
6091            if (boring == UNKNOWN_BORING) {
6092                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6093                if (boring != null) {
6094                    mBoring = boring;
6095                }
6096            }
6097
6098            if (boring != null) {
6099                if (boring.width <= w &&
6100                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
6101                    if (mSavedLayout != null) {
6102                        mLayout = mSavedLayout.
6103                                replaceOrMake(mTransformed, mTextPaint,
6104                                w, alignment, mSpacingMult, mSpacingAdd,
6105                                boring, mIncludePad);
6106                    } else {
6107                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6108                                w, alignment, mSpacingMult, mSpacingAdd,
6109                                boring, mIncludePad);
6110                    }
6111
6112                    mSavedLayout = (BoringLayout) mLayout;
6113                } else if (shouldEllipsize && boring.width <= w) {
6114                    if (mSavedLayout != null) {
6115                        mLayout = mSavedLayout.
6116                                replaceOrMake(mTransformed, mTextPaint,
6117                                w, alignment, mSpacingMult, mSpacingAdd,
6118                                boring, mIncludePad, mEllipsize,
6119                                ellipsisWidth);
6120                    } else {
6121                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6122                                w, alignment, mSpacingMult, mSpacingAdd,
6123                                boring, mIncludePad, mEllipsize,
6124                                ellipsisWidth);
6125                    }
6126                } else if (shouldEllipsize) {
6127                    mLayout = new StaticLayout(mTransformed,
6128                                0, mTransformed.length(),
6129                                mTextPaint, w, alignment, mTextDir, mSpacingMult,
6130                                mSpacingAdd, mIncludePad, mEllipsize,
6131                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6132                } else {
6133                    mLayout = new StaticLayout(mTransformed, mTextPaint,
6134                            w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6135                            mIncludePad);
6136                }
6137            } else if (shouldEllipsize) {
6138                mLayout = new StaticLayout(mTransformed,
6139                            0, mTransformed.length(),
6140                            mTextPaint, w, alignment, mTextDir, mSpacingMult,
6141                            mSpacingAdd, mIncludePad, mEllipsize,
6142                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6143            } else {
6144                mLayout = new StaticLayout(mTransformed, mTextPaint,
6145                        w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6146                        mIncludePad);
6147            }
6148        }
6149
6150        shouldEllipsize = mEllipsize != null;
6151        mHintLayout = null;
6152
6153        if (mHint != null) {
6154            if (shouldEllipsize) hintWidth = w;
6155
6156            if (hintBoring == UNKNOWN_BORING) {
6157                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6158                                                   mHintBoring);
6159                if (hintBoring != null) {
6160                    mHintBoring = hintBoring;
6161                }
6162            }
6163
6164            if (hintBoring != null) {
6165                if (hintBoring.width <= hintWidth &&
6166                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6167                    if (mSavedHintLayout != null) {
6168                        mHintLayout = mSavedHintLayout.
6169                                replaceOrMake(mHint, mTextPaint,
6170                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6171                                hintBoring, mIncludePad);
6172                    } else {
6173                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6174                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6175                                hintBoring, mIncludePad);
6176                    }
6177
6178                    mSavedHintLayout = (BoringLayout) mHintLayout;
6179                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6180                    if (mSavedHintLayout != null) {
6181                        mHintLayout = mSavedHintLayout.
6182                                replaceOrMake(mHint, mTextPaint,
6183                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6184                                hintBoring, mIncludePad, mEllipsize,
6185                                ellipsisWidth);
6186                    } else {
6187                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6188                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6189                                hintBoring, mIncludePad, mEllipsize,
6190                                ellipsisWidth);
6191                    }
6192                } else if (shouldEllipsize) {
6193                    mHintLayout = new StaticLayout(mHint,
6194                                0, mHint.length(),
6195                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6196                                mSpacingAdd, mIncludePad, mEllipsize,
6197                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6198                } else {
6199                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6200                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6201                            mIncludePad);
6202                }
6203            } else if (shouldEllipsize) {
6204                mHintLayout = new StaticLayout(mHint,
6205                            0, mHint.length(),
6206                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6207                            mSpacingAdd, mIncludePad, mEllipsize,
6208                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6209            } else {
6210                mHintLayout = new StaticLayout(mHint, mTextPaint,
6211                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6212                        mIncludePad);
6213            }
6214        }
6215
6216        if (bringIntoView) {
6217            registerForPreDraw();
6218        }
6219
6220        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6221            if (!compressText(ellipsisWidth)) {
6222                final int height = mLayoutParams.height;
6223                // If the size of the view does not depend on the size of the text, try to
6224                // start the marquee immediately
6225                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6226                    startMarquee();
6227                } else {
6228                    // Defer the start of the marquee until we know our width (see setFrame())
6229                    mRestartMarquee = true;
6230                }
6231            }
6232        }
6233
6234        // CursorControllers need a non-null mLayout
6235        prepareCursorControllers();
6236    }
6237
6238    private boolean compressText(float width) {
6239        if (isHardwareAccelerated()) return false;
6240
6241        // Only compress the text if it hasn't been compressed by the previous pass
6242        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6243                mTextPaint.getTextScaleX() == 1.0f) {
6244            final float textWidth = mLayout.getLineWidth(0);
6245            final float overflow = (textWidth + 1.0f - width) / width;
6246            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6247                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6248                post(new Runnable() {
6249                    public void run() {
6250                        requestLayout();
6251                    }
6252                });
6253                return true;
6254            }
6255        }
6256
6257        return false;
6258    }
6259
6260    private static int desired(Layout layout) {
6261        int n = layout.getLineCount();
6262        CharSequence text = layout.getText();
6263        float max = 0;
6264
6265        // if any line was wrapped, we can't use it.
6266        // but it's ok for the last line not to have a newline
6267
6268        for (int i = 0; i < n - 1; i++) {
6269            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6270                return -1;
6271        }
6272
6273        for (int i = 0; i < n; i++) {
6274            max = Math.max(max, layout.getLineWidth(i));
6275        }
6276
6277        return (int) FloatMath.ceil(max);
6278    }
6279
6280    /**
6281     * Set whether the TextView includes extra top and bottom padding to make
6282     * room for accents that go above the normal ascent and descent.
6283     * The default is true.
6284     *
6285     * @attr ref android.R.styleable#TextView_includeFontPadding
6286     */
6287    public void setIncludeFontPadding(boolean includepad) {
6288        if (mIncludePad != includepad) {
6289            mIncludePad = includepad;
6290
6291            if (mLayout != null) {
6292                nullLayouts();
6293                requestLayout();
6294                invalidate();
6295            }
6296        }
6297    }
6298
6299    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6300
6301    @Override
6302    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6303        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6304        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6305        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6306        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6307
6308        int width;
6309        int height;
6310
6311        BoringLayout.Metrics boring = UNKNOWN_BORING;
6312        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6313
6314        if (mTextDir == null) {
6315            resolveTextDirection();
6316        }
6317
6318        int des = -1;
6319        boolean fromexisting = false;
6320
6321        if (widthMode == MeasureSpec.EXACTLY) {
6322            // Parent has told us how big to be. So be it.
6323            width = widthSize;
6324        } else {
6325            if (mLayout != null && mEllipsize == null) {
6326                des = desired(mLayout);
6327            }
6328
6329            if (des < 0) {
6330                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6331                if (boring != null) {
6332                    mBoring = boring;
6333                }
6334            } else {
6335                fromexisting = true;
6336            }
6337
6338            if (boring == null || boring == UNKNOWN_BORING) {
6339                if (des < 0) {
6340                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6341                }
6342
6343                width = des;
6344            } else {
6345                width = boring.width;
6346            }
6347
6348            final Drawables dr = mDrawables;
6349            if (dr != null) {
6350                width = Math.max(width, dr.mDrawableWidthTop);
6351                width = Math.max(width, dr.mDrawableWidthBottom);
6352            }
6353
6354            if (mHint != null) {
6355                int hintDes = -1;
6356                int hintWidth;
6357
6358                if (mHintLayout != null && mEllipsize == null) {
6359                    hintDes = desired(mHintLayout);
6360                }
6361
6362                if (hintDes < 0) {
6363                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6364                    if (hintBoring != null) {
6365                        mHintBoring = hintBoring;
6366                    }
6367                }
6368
6369                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6370                    if (hintDes < 0) {
6371                        hintDes = (int) FloatMath.ceil(
6372                                Layout.getDesiredWidth(mHint, mTextPaint));
6373                    }
6374
6375                    hintWidth = hintDes;
6376                } else {
6377                    hintWidth = hintBoring.width;
6378                }
6379
6380                if (hintWidth > width) {
6381                    width = hintWidth;
6382                }
6383            }
6384
6385            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6386
6387            if (mMaxWidthMode == EMS) {
6388                width = Math.min(width, mMaxWidth * getLineHeight());
6389            } else {
6390                width = Math.min(width, mMaxWidth);
6391            }
6392
6393            if (mMinWidthMode == EMS) {
6394                width = Math.max(width, mMinWidth * getLineHeight());
6395            } else {
6396                width = Math.max(width, mMinWidth);
6397            }
6398
6399            // Check against our minimum width
6400            width = Math.max(width, getSuggestedMinimumWidth());
6401
6402            if (widthMode == MeasureSpec.AT_MOST) {
6403                width = Math.min(widthSize, width);
6404            }
6405        }
6406
6407        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6408        int unpaddedWidth = want;
6409
6410        if (mHorizontallyScrolling) want = VERY_WIDE;
6411
6412        int hintWant = want;
6413        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6414
6415        if (mLayout == null) {
6416            makeNewLayout(want, hintWant, boring, hintBoring,
6417                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6418        } else {
6419            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6420                    (hintWidth != hintWant) ||
6421                    (mLayout.getEllipsizedWidth() !=
6422                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6423
6424            final boolean widthChanged = (mHint == null) &&
6425                    (mEllipsize == null) &&
6426                    (want > mLayout.getWidth()) &&
6427                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6428
6429            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6430
6431            if (layoutChanged || maximumChanged) {
6432                if (!maximumChanged && widthChanged) {
6433                    mLayout.increaseWidthTo(want);
6434                } else {
6435                    makeNewLayout(want, hintWant, boring, hintBoring,
6436                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6437                }
6438            } else {
6439                // Nothing has changed
6440            }
6441        }
6442
6443        if (heightMode == MeasureSpec.EXACTLY) {
6444            // Parent has told us how big to be. So be it.
6445            height = heightSize;
6446            mDesiredHeightAtMeasure = -1;
6447        } else {
6448            int desired = getDesiredHeight();
6449
6450            height = desired;
6451            mDesiredHeightAtMeasure = desired;
6452
6453            if (heightMode == MeasureSpec.AT_MOST) {
6454                height = Math.min(desired, heightSize);
6455            }
6456        }
6457
6458        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6459        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6460            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6461        }
6462
6463        /*
6464         * We didn't let makeNewLayout() register to bring the cursor into view,
6465         * so do it here if there is any possibility that it is needed.
6466         */
6467        if (mMovement != null ||
6468            mLayout.getWidth() > unpaddedWidth ||
6469            mLayout.getHeight() > unpaddedHeight) {
6470            registerForPreDraw();
6471        } else {
6472            scrollTo(0, 0);
6473        }
6474
6475        setMeasuredDimension(width, height);
6476    }
6477
6478    private int getDesiredHeight() {
6479        return Math.max(
6480                getDesiredHeight(mLayout, true),
6481                getDesiredHeight(mHintLayout, mEllipsize != null));
6482    }
6483
6484    private int getDesiredHeight(Layout layout, boolean cap) {
6485        if (layout == null) {
6486            return 0;
6487        }
6488
6489        int linecount = layout.getLineCount();
6490        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6491        int desired = layout.getLineTop(linecount);
6492
6493        final Drawables dr = mDrawables;
6494        if (dr != null) {
6495            desired = Math.max(desired, dr.mDrawableHeightLeft);
6496            desired = Math.max(desired, dr.mDrawableHeightRight);
6497        }
6498
6499        desired += pad;
6500
6501        if (mMaxMode == LINES) {
6502            /*
6503             * Don't cap the hint to a certain number of lines.
6504             * (Do cap it, though, if we have a maximum pixel height.)
6505             */
6506            if (cap) {
6507                if (linecount > mMaximum) {
6508                    desired = layout.getLineTop(mMaximum);
6509
6510                    if (dr != null) {
6511                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6512                        desired = Math.max(desired, dr.mDrawableHeightRight);
6513                    }
6514
6515                    desired += pad;
6516                    linecount = mMaximum;
6517                }
6518            }
6519        } else {
6520            desired = Math.min(desired, mMaximum);
6521        }
6522
6523        if (mMinMode == LINES) {
6524            if (linecount < mMinimum) {
6525                desired += getLineHeight() * (mMinimum - linecount);
6526            }
6527        } else {
6528            desired = Math.max(desired, mMinimum);
6529        }
6530
6531        // Check against our minimum height
6532        desired = Math.max(desired, getSuggestedMinimumHeight());
6533
6534        return desired;
6535    }
6536
6537    /**
6538     * Check whether a change to the existing text layout requires a
6539     * new view layout.
6540     */
6541    private void checkForResize() {
6542        boolean sizeChanged = false;
6543
6544        if (mLayout != null) {
6545            // Check if our width changed
6546            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6547                sizeChanged = true;
6548                invalidate();
6549            }
6550
6551            // Check if our height changed
6552            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6553                int desiredHeight = getDesiredHeight();
6554
6555                if (desiredHeight != this.getHeight()) {
6556                    sizeChanged = true;
6557                }
6558            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6559                if (mDesiredHeightAtMeasure >= 0) {
6560                    int desiredHeight = getDesiredHeight();
6561
6562                    if (desiredHeight != mDesiredHeightAtMeasure) {
6563                        sizeChanged = true;
6564                    }
6565                }
6566            }
6567        }
6568
6569        if (sizeChanged) {
6570            requestLayout();
6571            // caller will have already invalidated
6572        }
6573    }
6574
6575    /**
6576     * Check whether entirely new text requires a new view layout
6577     * or merely a new text layout.
6578     */
6579    private void checkForRelayout() {
6580        // If we have a fixed width, we can just swap in a new text layout
6581        // if the text height stays the same or if the view height is fixed.
6582
6583        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6584                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6585                (mHint == null || mHintLayout != null) &&
6586                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6587            // Static width, so try making a new text layout.
6588
6589            int oldht = mLayout.getHeight();
6590            int want = mLayout.getWidth();
6591            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6592
6593            /*
6594             * No need to bring the text into view, since the size is not
6595             * changing (unless we do the requestLayout(), in which case it
6596             * will happen at measure).
6597             */
6598            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6599                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6600                          false);
6601
6602            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6603                // In a fixed-height view, so use our new text layout.
6604                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6605                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6606                    invalidate();
6607                    return;
6608                }
6609
6610                // Dynamic height, but height has stayed the same,
6611                // so use our new text layout.
6612                if (mLayout.getHeight() == oldht &&
6613                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6614                    invalidate();
6615                    return;
6616                }
6617            }
6618
6619            // We lose: the height has changed and we have a dynamic height.
6620            // Request a new view layout using our new text layout.
6621            requestLayout();
6622            invalidate();
6623        } else {
6624            // Dynamic width, so we have no choice but to request a new
6625            // view layout with a new text layout.
6626            nullLayouts();
6627            requestLayout();
6628            invalidate();
6629        }
6630    }
6631
6632    /**
6633     * Returns true if anything changed.
6634     */
6635    private boolean bringTextIntoView() {
6636        int line = 0;
6637        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6638            line = mLayout.getLineCount() - 1;
6639        }
6640
6641        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6642        int dir = mLayout.getParagraphDirection(line);
6643        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6644        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6645        int ht = mLayout.getHeight();
6646
6647        int scrollx, scrolly;
6648
6649        // Convert to left, center, or right alignment.
6650        if (a == Layout.Alignment.ALIGN_NORMAL) {
6651            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6652                Layout.Alignment.ALIGN_RIGHT;
6653        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6654            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6655                Layout.Alignment.ALIGN_LEFT;
6656        }
6657
6658        if (a == Layout.Alignment.ALIGN_CENTER) {
6659            /*
6660             * Keep centered if possible, or, if it is too wide to fit,
6661             * keep leading edge in view.
6662             */
6663
6664            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6665            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6666
6667            if (right - left < hspace) {
6668                scrollx = (right + left) / 2 - hspace / 2;
6669            } else {
6670                if (dir < 0) {
6671                    scrollx = right - hspace;
6672                } else {
6673                    scrollx = left;
6674                }
6675            }
6676        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6677            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6678            scrollx = right - hspace;
6679        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6680            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6681        }
6682
6683        if (ht < vspace) {
6684            scrolly = 0;
6685        } else {
6686            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6687                scrolly = ht - vspace;
6688            } else {
6689                scrolly = 0;
6690            }
6691        }
6692
6693        if (scrollx != mScrollX || scrolly != mScrollY) {
6694            scrollTo(scrollx, scrolly);
6695            return true;
6696        } else {
6697            return false;
6698        }
6699    }
6700
6701    /**
6702     * Move the point, specified by the offset, into the view if it is needed.
6703     * This has to be called after layout. Returns true if anything changed.
6704     */
6705    public boolean bringPointIntoView(int offset) {
6706        boolean changed = false;
6707
6708        if (mLayout == null) return changed;
6709
6710        int line = mLayout.getLineForOffset(offset);
6711
6712        // FIXME: Is it okay to truncate this, or should we round?
6713        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6714        final int top = mLayout.getLineTop(line);
6715        final int bottom = mLayout.getLineTop(line + 1);
6716
6717        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6718        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6719        int ht = mLayout.getHeight();
6720
6721        int grav;
6722
6723        switch (mLayout.getParagraphAlignment(line)) {
6724            case ALIGN_LEFT:
6725                grav = 1;
6726                break;
6727            case ALIGN_RIGHT:
6728                grav = -1;
6729                break;
6730            case ALIGN_NORMAL:
6731                grav = mLayout.getParagraphDirection(line);
6732                break;
6733            case ALIGN_OPPOSITE:
6734                grav = -mLayout.getParagraphDirection(line);
6735                break;
6736            case ALIGN_CENTER:
6737            default:
6738                grav = 0;
6739                break;
6740        }
6741
6742        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6743        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6744
6745        int hslack = (bottom - top) / 2;
6746        int vslack = hslack;
6747
6748        if (vslack > vspace / 4)
6749            vslack = vspace / 4;
6750        if (hslack > hspace / 4)
6751            hslack = hspace / 4;
6752
6753        int hs = mScrollX;
6754        int vs = mScrollY;
6755
6756        if (top - vs < vslack)
6757            vs = top - vslack;
6758        if (bottom - vs > vspace - vslack)
6759            vs = bottom - (vspace - vslack);
6760        if (ht - vs < vspace)
6761            vs = ht - vspace;
6762        if (0 - vs > 0)
6763            vs = 0;
6764
6765        if (grav != 0) {
6766            if (x - hs < hslack) {
6767                hs = x - hslack;
6768            }
6769            if (x - hs > hspace - hslack) {
6770                hs = x - (hspace - hslack);
6771            }
6772        }
6773
6774        if (grav < 0) {
6775            if (left - hs > 0)
6776                hs = left;
6777            if (right - hs < hspace)
6778                hs = right - hspace;
6779        } else if (grav > 0) {
6780            if (right - hs < hspace)
6781                hs = right - hspace;
6782            if (left - hs > 0)
6783                hs = left;
6784        } else /* grav == 0 */ {
6785            if (right - left <= hspace) {
6786                /*
6787                 * If the entire text fits, center it exactly.
6788                 */
6789                hs = left - (hspace - (right - left)) / 2;
6790            } else if (x > right - hslack) {
6791                /*
6792                 * If we are near the right edge, keep the right edge
6793                 * at the edge of the view.
6794                 */
6795                hs = right - hspace;
6796            } else if (x < left + hslack) {
6797                /*
6798                 * If we are near the left edge, keep the left edge
6799                 * at the edge of the view.
6800                 */
6801                hs = left;
6802            } else if (left > hs) {
6803                /*
6804                 * Is there whitespace visible at the left?  Fix it if so.
6805                 */
6806                hs = left;
6807            } else if (right < hs + hspace) {
6808                /*
6809                 * Is there whitespace visible at the right?  Fix it if so.
6810                 */
6811                hs = right - hspace;
6812            } else {
6813                /*
6814                 * Otherwise, float as needed.
6815                 */
6816                if (x - hs < hslack) {
6817                    hs = x - hslack;
6818                }
6819                if (x - hs > hspace - hslack) {
6820                    hs = x - (hspace - hslack);
6821                }
6822            }
6823        }
6824
6825        if (hs != mScrollX || vs != mScrollY) {
6826            if (mScroller == null) {
6827                scrollTo(hs, vs);
6828            } else {
6829                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6830                int dx = hs - mScrollX;
6831                int dy = vs - mScrollY;
6832
6833                if (duration > ANIMATED_SCROLL_GAP) {
6834                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6835                    awakenScrollBars(mScroller.getDuration());
6836                    invalidate();
6837                } else {
6838                    if (!mScroller.isFinished()) {
6839                        mScroller.abortAnimation();
6840                    }
6841
6842                    scrollBy(dx, dy);
6843                }
6844
6845                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6846            }
6847
6848            changed = true;
6849        }
6850
6851        if (isFocused()) {
6852            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6853            // requestRectangleOnScreen() is in terms of content coordinates.
6854
6855            if (mTempRect == null) mTempRect = new Rect();
6856            // The offsets here are to ensure the rectangle we are using is
6857            // within our view bounds, in case the cursor is on the far left
6858            // or right.  If it isn't withing the bounds, then this request
6859            // will be ignored.
6860            mTempRect.set(x - 2, top, x + 2, bottom);
6861            getInterestingRect(mTempRect, line);
6862            mTempRect.offset(mScrollX, mScrollY);
6863
6864            if (requestRectangleOnScreen(mTempRect)) {
6865                changed = true;
6866            }
6867        }
6868
6869        return changed;
6870    }
6871
6872    /**
6873     * Move the cursor, if needed, so that it is at an offset that is visible
6874     * to the user.  This will not move the cursor if it represents more than
6875     * one character (a selection range).  This will only work if the
6876     * TextView contains spannable text; otherwise it will do nothing.
6877     *
6878     * @return True if the cursor was actually moved, false otherwise.
6879     */
6880    public boolean moveCursorToVisibleOffset() {
6881        if (!(mText instanceof Spannable)) {
6882            return false;
6883        }
6884        int start = getSelectionStart();
6885        int end = getSelectionEnd();
6886        if (start != end) {
6887            return false;
6888        }
6889
6890        // First: make sure the line is visible on screen:
6891
6892        int line = mLayout.getLineForOffset(start);
6893
6894        final int top = mLayout.getLineTop(line);
6895        final int bottom = mLayout.getLineTop(line + 1);
6896        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6897        int vslack = (bottom - top) / 2;
6898        if (vslack > vspace / 4)
6899            vslack = vspace / 4;
6900        final int vs = mScrollY;
6901
6902        if (top < (vs+vslack)) {
6903            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6904        } else if (bottom > (vspace+vs-vslack)) {
6905            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6906        }
6907
6908        // Next: make sure the character is visible on screen:
6909
6910        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6911        final int hs = mScrollX;
6912        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6913        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6914
6915        // line might contain bidirectional text
6916        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6917        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6918
6919        int newStart = start;
6920        if (newStart < lowChar) {
6921            newStart = lowChar;
6922        } else if (newStart > highChar) {
6923            newStart = highChar;
6924        }
6925
6926        if (newStart != start) {
6927            Selection.setSelection((Spannable)mText, newStart);
6928            return true;
6929        }
6930
6931        return false;
6932    }
6933
6934    @Override
6935    public void computeScroll() {
6936        if (mScroller != null) {
6937            if (mScroller.computeScrollOffset()) {
6938                mScrollX = mScroller.getCurrX();
6939                mScrollY = mScroller.getCurrY();
6940                invalidateParentCaches();
6941                postInvalidate();  // So we draw again
6942            }
6943        }
6944    }
6945
6946    private void getInterestingRect(Rect r, int line) {
6947        convertFromViewportToContentCoordinates(r);
6948
6949        // Rectangle can can be expanded on first and last line to take
6950        // padding into account.
6951        // TODO Take left/right padding into account too?
6952        if (line == 0) r.top -= getExtendedPaddingTop();
6953        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6954    }
6955
6956    private void convertFromViewportToContentCoordinates(Rect r) {
6957        final int horizontalOffset = viewportToContentHorizontalOffset();
6958        r.left += horizontalOffset;
6959        r.right += horizontalOffset;
6960
6961        final int verticalOffset = viewportToContentVerticalOffset();
6962        r.top += verticalOffset;
6963        r.bottom += verticalOffset;
6964    }
6965
6966    private int viewportToContentHorizontalOffset() {
6967        return getCompoundPaddingLeft() - mScrollX;
6968    }
6969
6970    private int viewportToContentVerticalOffset() {
6971        int offset = getExtendedPaddingTop() - mScrollY;
6972        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6973            offset += getVerticalOffset(false);
6974        }
6975        return offset;
6976    }
6977
6978    @Override
6979    public void debug(int depth) {
6980        super.debug(depth);
6981
6982        String output = debugIndent(depth);
6983        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6984                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6985                + "} ";
6986
6987        if (mText != null) {
6988
6989            output += "mText=\"" + mText + "\" ";
6990            if (mLayout != null) {
6991                output += "mLayout width=" + mLayout.getWidth()
6992                        + " height=" + mLayout.getHeight();
6993            }
6994        } else {
6995            output += "mText=NULL";
6996        }
6997        Log.d(VIEW_LOG_TAG, output);
6998    }
6999
7000    /**
7001     * Convenience for {@link Selection#getSelectionStart}.
7002     */
7003    @ViewDebug.ExportedProperty(category = "text")
7004    public int getSelectionStart() {
7005        return Selection.getSelectionStart(getText());
7006    }
7007
7008    /**
7009     * Convenience for {@link Selection#getSelectionEnd}.
7010     */
7011    @ViewDebug.ExportedProperty(category = "text")
7012    public int getSelectionEnd() {
7013        return Selection.getSelectionEnd(getText());
7014    }
7015
7016    /**
7017     * Return true iff there is a selection inside this text view.
7018     */
7019    public boolean hasSelection() {
7020        final int selectionStart = getSelectionStart();
7021        final int selectionEnd = getSelectionEnd();
7022
7023        return selectionStart >= 0 && selectionStart != selectionEnd;
7024    }
7025
7026    /**
7027     * Sets the properties of this field (lines, horizontally scrolling,
7028     * transformation method) to be for a single-line input.
7029     *
7030     * @attr ref android.R.styleable#TextView_singleLine
7031     */
7032    public void setSingleLine() {
7033        setSingleLine(true);
7034    }
7035
7036    /**
7037     * Sets the properties of this field to transform input to ALL CAPS
7038     * display. This may use a "small caps" formatting if available.
7039     * This setting will be ignored if this field is editable or selectable.
7040     *
7041     * This call replaces the current transformation method. Disabling this
7042     * will not necessarily restore the previous behavior from before this
7043     * was enabled.
7044     *
7045     * @see #setTransformationMethod(TransformationMethod)
7046     * @attr ref android.R.styleable#TextView_textAllCaps
7047     */
7048    public void setAllCaps(boolean allCaps) {
7049        if (allCaps) {
7050            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7051        } else {
7052            setTransformationMethod(null);
7053        }
7054    }
7055
7056    /**
7057     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7058     * transformation method) to be for a single-line input; if false, restores these to the default
7059     * conditions.
7060     *
7061     * Note that the default conditions are not necessarily those that were in effect prior this
7062     * method, and you may want to reset these properties to your custom values.
7063     *
7064     * @attr ref android.R.styleable#TextView_singleLine
7065     */
7066    @android.view.RemotableViewMethod
7067    public void setSingleLine(boolean singleLine) {
7068        // Could be used, but may break backward compatibility.
7069        // if (mSingleLine == singleLine) return;
7070        setInputTypeSingleLine(singleLine);
7071        applySingleLine(singleLine, true, true);
7072    }
7073
7074    /**
7075     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7076     * @param singleLine
7077     */
7078    private void setInputTypeSingleLine(boolean singleLine) {
7079        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7080            if (singleLine) {
7081                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7082            } else {
7083                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7084            }
7085        }
7086    }
7087
7088    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7089            boolean changeMaxLines) {
7090        mSingleLine = singleLine;
7091        if (singleLine) {
7092            setLines(1);
7093            setHorizontallyScrolling(true);
7094            if (applyTransformation) {
7095                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7096            }
7097        } else {
7098            if (changeMaxLines) {
7099                setMaxLines(Integer.MAX_VALUE);
7100            }
7101            setHorizontallyScrolling(false);
7102            if (applyTransformation) {
7103                setTransformationMethod(null);
7104            }
7105        }
7106    }
7107
7108    /**
7109     * Causes words in the text that are longer than the view is wide
7110     * to be ellipsized instead of broken in the middle.  You may also
7111     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7112     * to constrain the text to a single line.  Use <code>null</code>
7113     * to turn off ellipsizing.
7114     *
7115     * If {@link #setMaxLines} has been used to set two or more lines,
7116     * {@link TextUtils.TruncateAt#END} and {@link TextUtils.TruncateAt#MARQUEE}
7117     * are only supported (other ellipsizing types will not do anything).
7118     *
7119     * @attr ref android.R.styleable#TextView_ellipsize
7120     */
7121    public void setEllipsize(TextUtils.TruncateAt where) {
7122        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7123        if (mEllipsize != where) {
7124            mEllipsize = where;
7125
7126            if (mLayout != null) {
7127                nullLayouts();
7128                requestLayout();
7129                invalidate();
7130            }
7131        }
7132    }
7133
7134    /**
7135     * Sets how many times to repeat the marquee animation. Only applied if the
7136     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7137     *
7138     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7139     */
7140    public void setMarqueeRepeatLimit(int marqueeLimit) {
7141        mMarqueeRepeatLimit = marqueeLimit;
7142    }
7143
7144    /**
7145     * Returns where, if anywhere, words that are longer than the view
7146     * is wide should be ellipsized.
7147     */
7148    @ViewDebug.ExportedProperty
7149    public TextUtils.TruncateAt getEllipsize() {
7150        return mEllipsize;
7151    }
7152
7153    /**
7154     * Set the TextView so that when it takes focus, all the text is
7155     * selected.
7156     *
7157     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7158     */
7159    @android.view.RemotableViewMethod
7160    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7161        mSelectAllOnFocus = selectAllOnFocus;
7162
7163        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7164            setText(mText, BufferType.SPANNABLE);
7165        }
7166    }
7167
7168    /**
7169     * Set whether the cursor is visible.  The default is true.
7170     *
7171     * @attr ref android.R.styleable#TextView_cursorVisible
7172     */
7173    @android.view.RemotableViewMethod
7174    public void setCursorVisible(boolean visible) {
7175        if (mCursorVisible != visible) {
7176            mCursorVisible = visible;
7177            invalidate();
7178
7179            makeBlink();
7180
7181            // InsertionPointCursorController depends on mCursorVisible
7182            prepareCursorControllers();
7183        }
7184    }
7185
7186    private boolean isCursorVisible() {
7187        return mCursorVisible && isTextEditable();
7188    }
7189
7190    private boolean canMarquee() {
7191        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7192        return width > 0 && mLayout.getLineWidth(0) > width;
7193    }
7194
7195    private void startMarquee() {
7196        // Do not ellipsize EditText
7197        if (mInput != null) return;
7198
7199        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7200            return;
7201        }
7202
7203        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7204                getLineCount() == 1 && canMarquee()) {
7205
7206            if (mMarquee == null) mMarquee = new Marquee(this);
7207            mMarquee.start(mMarqueeRepeatLimit);
7208        }
7209    }
7210
7211    private void stopMarquee() {
7212        if (mMarquee != null && !mMarquee.isStopped()) {
7213            mMarquee.stop();
7214        }
7215    }
7216
7217    private void startStopMarquee(boolean start) {
7218        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7219            if (start) {
7220                startMarquee();
7221            } else {
7222                stopMarquee();
7223            }
7224        }
7225    }
7226
7227    private static final class Marquee extends Handler {
7228        // TODO: Add an option to configure this
7229        private static final float MARQUEE_DELTA_MAX = 0.07f;
7230        private static final int MARQUEE_DELAY = 1200;
7231        private static final int MARQUEE_RESTART_DELAY = 1200;
7232        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7233        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7234
7235        private static final byte MARQUEE_STOPPED = 0x0;
7236        private static final byte MARQUEE_STARTING = 0x1;
7237        private static final byte MARQUEE_RUNNING = 0x2;
7238
7239        private static final int MESSAGE_START = 0x1;
7240        private static final int MESSAGE_TICK = 0x2;
7241        private static final int MESSAGE_RESTART = 0x3;
7242
7243        private final WeakReference<TextView> mView;
7244
7245        private byte mStatus = MARQUEE_STOPPED;
7246        private final float mScrollUnit;
7247        private float mMaxScroll;
7248        float mMaxFadeScroll;
7249        private float mGhostStart;
7250        private float mGhostOffset;
7251        private float mFadeStop;
7252        private int mRepeatLimit;
7253
7254        float mScroll;
7255
7256        Marquee(TextView v) {
7257            final float density = v.getContext().getResources().getDisplayMetrics().density;
7258            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7259            mView = new WeakReference<TextView>(v);
7260        }
7261
7262        @Override
7263        public void handleMessage(Message msg) {
7264            switch (msg.what) {
7265                case MESSAGE_START:
7266                    mStatus = MARQUEE_RUNNING;
7267                    tick();
7268                    break;
7269                case MESSAGE_TICK:
7270                    tick();
7271                    break;
7272                case MESSAGE_RESTART:
7273                    if (mStatus == MARQUEE_RUNNING) {
7274                        if (mRepeatLimit >= 0) {
7275                            mRepeatLimit--;
7276                        }
7277                        start(mRepeatLimit);
7278                    }
7279                    break;
7280            }
7281        }
7282
7283        void tick() {
7284            if (mStatus != MARQUEE_RUNNING) {
7285                return;
7286            }
7287
7288            removeMessages(MESSAGE_TICK);
7289
7290            final TextView textView = mView.get();
7291            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7292                mScroll += mScrollUnit;
7293                if (mScroll > mMaxScroll) {
7294                    mScroll = mMaxScroll;
7295                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7296                } else {
7297                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7298                }
7299                textView.invalidate();
7300            }
7301        }
7302
7303        void stop() {
7304            mStatus = MARQUEE_STOPPED;
7305            removeMessages(MESSAGE_START);
7306            removeMessages(MESSAGE_RESTART);
7307            removeMessages(MESSAGE_TICK);
7308            resetScroll();
7309        }
7310
7311        private void resetScroll() {
7312            mScroll = 0.0f;
7313            final TextView textView = mView.get();
7314            if (textView != null) textView.invalidate();
7315        }
7316
7317        void start(int repeatLimit) {
7318            if (repeatLimit == 0) {
7319                stop();
7320                return;
7321            }
7322            mRepeatLimit = repeatLimit;
7323            final TextView textView = mView.get();
7324            if (textView != null && textView.mLayout != null) {
7325                mStatus = MARQUEE_STARTING;
7326                mScroll = 0.0f;
7327                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7328                        textView.getCompoundPaddingRight();
7329                final float lineWidth = textView.mLayout.getLineWidth(0);
7330                final float gap = textWidth / 3.0f;
7331                mGhostStart = lineWidth - textWidth + gap;
7332                mMaxScroll = mGhostStart + textWidth;
7333                mGhostOffset = lineWidth + gap;
7334                mFadeStop = lineWidth + textWidth / 6.0f;
7335                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7336
7337                textView.invalidate();
7338                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7339            }
7340        }
7341
7342        float getGhostOffset() {
7343            return mGhostOffset;
7344        }
7345
7346        boolean shouldDrawLeftFade() {
7347            return mScroll <= mFadeStop;
7348        }
7349
7350        boolean shouldDrawGhost() {
7351            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7352        }
7353
7354        boolean isRunning() {
7355            return mStatus == MARQUEE_RUNNING;
7356        }
7357
7358        boolean isStopped() {
7359            return mStatus == MARQUEE_STOPPED;
7360        }
7361    }
7362
7363    /**
7364     * This method is called when the text is changed, in case any subclasses
7365     * would like to know.
7366     *
7367     * Within <code>text</code>, the <code>lengthAfter</code> characters
7368     * beginning at <code>start</code> have just replaced old text that had
7369     * length <code>lengthBefore</code>. It is an error to attempt to make
7370     * changes to <code>text</code> from this callback.
7371     *
7372     * @param text The text the TextView is displaying
7373     * @param start The offset of the start of the range of the text that was
7374     * modified
7375     * @param lengthBefore The length of the former text that has been replaced
7376     * @param lengthAfter The length of the replacement modified text
7377     */
7378    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7379        // intentionally empty
7380    }
7381
7382    /**
7383     * This method is called when the selection has changed, in case any
7384     * subclasses would like to know.
7385     *
7386     * @param selStart The new selection start location.
7387     * @param selEnd The new selection end location.
7388     */
7389    protected void onSelectionChanged(int selStart, int selEnd) {
7390        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7391    }
7392
7393    /**
7394     * Adds a TextWatcher to the list of those whose methods are called
7395     * whenever this TextView's text changes.
7396     * <p>
7397     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7398     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7399     * if there are any text changed listeners forces the buffer type to
7400     * Editable if it would not otherwise be and does call this method.
7401     */
7402    public void addTextChangedListener(TextWatcher watcher) {
7403        if (mListeners == null) {
7404            mListeners = new ArrayList<TextWatcher>();
7405        }
7406
7407        mListeners.add(watcher);
7408    }
7409
7410    /**
7411     * Removes the specified TextWatcher from the list of those whose
7412     * methods are called
7413     * whenever this TextView's text changes.
7414     */
7415    public void removeTextChangedListener(TextWatcher watcher) {
7416        if (mListeners != null) {
7417            int i = mListeners.indexOf(watcher);
7418
7419            if (i >= 0) {
7420                mListeners.remove(i);
7421            }
7422        }
7423    }
7424
7425    private void sendBeforeTextChanged(CharSequence text, int start, int before,
7426                                   int after) {
7427        if (mListeners != null) {
7428            final ArrayList<TextWatcher> list = mListeners;
7429            final int count = list.size();
7430            for (int i = 0; i < count; i++) {
7431                list.get(i).beforeTextChanged(text, start, before, after);
7432            }
7433        }
7434    }
7435
7436    /**
7437     * Not private so it can be called from an inner class without going
7438     * through a thunk.
7439     */
7440    void sendOnTextChanged(CharSequence text, int start, int before,
7441                                   int after) {
7442        if (mListeners != null) {
7443            final ArrayList<TextWatcher> list = mListeners;
7444            final int count = list.size();
7445            for (int i = 0; i < count; i++) {
7446                list.get(i).onTextChanged(text, start, before, after);
7447            }
7448        }
7449    }
7450
7451    /**
7452     * Not private so it can be called from an inner class without going
7453     * through a thunk.
7454     */
7455    void sendAfterTextChanged(Editable text) {
7456        if (mListeners != null) {
7457            final ArrayList<TextWatcher> list = mListeners;
7458            final int count = list.size();
7459            for (int i = 0; i < count; i++) {
7460                list.get(i).afterTextChanged(text);
7461            }
7462        }
7463    }
7464
7465    /**
7466     * Not private so it can be called from an inner class without going
7467     * through a thunk.
7468     */
7469    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7470        final InputMethodState ims = mInputMethodState;
7471        if (ims == null || ims.mBatchEditNesting == 0) {
7472            updateAfterEdit();
7473        }
7474        if (ims != null) {
7475            ims.mContentChanged = true;
7476            if (ims.mChangedStart < 0) {
7477                ims.mChangedStart = start;
7478                ims.mChangedEnd = start+before;
7479            } else {
7480                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7481                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7482            }
7483            ims.mChangedDelta += after-before;
7484        }
7485
7486        sendOnTextChanged(buffer, start, before, after);
7487        onTextChanged(buffer, start, before, after);
7488
7489        // Hide the controllers if the amount of content changed
7490        if (before != after) {
7491            hideControllers();
7492        }
7493    }
7494
7495    /**
7496     * Not private so it can be called from an inner class without going
7497     * through a thunk.
7498     */
7499    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7500        // XXX Make the start and end move together if this ends up
7501        // spending too much time invalidating.
7502
7503        boolean selChanged = false;
7504        int newSelStart=-1, newSelEnd=-1;
7505
7506        final InputMethodState ims = mInputMethodState;
7507
7508        if (what == Selection.SELECTION_END) {
7509            mHighlightPathBogus = true;
7510            selChanged = true;
7511            newSelEnd = newStart;
7512
7513            if (!isFocused()) {
7514                mSelectionMoved = true;
7515            }
7516
7517            if (oldStart >= 0 || newStart >= 0) {
7518                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7519                registerForPreDraw();
7520                makeBlink();
7521            }
7522        }
7523
7524        if (what == Selection.SELECTION_START) {
7525            mHighlightPathBogus = true;
7526            selChanged = true;
7527            newSelStart = newStart;
7528
7529            if (!isFocused()) {
7530                mSelectionMoved = true;
7531            }
7532
7533            if (oldStart >= 0 || newStart >= 0) {
7534                int end = Selection.getSelectionEnd(buf);
7535                invalidateCursor(end, oldStart, newStart);
7536            }
7537        }
7538
7539        if (selChanged) {
7540            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7541                if (newSelStart < 0) {
7542                    newSelStart = Selection.getSelectionStart(buf);
7543                }
7544                if (newSelEnd < 0) {
7545                    newSelEnd = Selection.getSelectionEnd(buf);
7546                }
7547                onSelectionChanged(newSelStart, newSelEnd);
7548            }
7549        }
7550
7551        if (what instanceof UpdateAppearance ||
7552            what instanceof ParagraphStyle) {
7553            if (ims == null || ims.mBatchEditNesting == 0) {
7554                invalidate();
7555                mHighlightPathBogus = true;
7556                checkForResize();
7557            } else {
7558                ims.mContentChanged = true;
7559            }
7560        }
7561
7562        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7563            mHighlightPathBogus = true;
7564            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7565                ims.mSelectionModeChanged = true;
7566            }
7567
7568            if (Selection.getSelectionStart(buf) >= 0) {
7569                if (ims == null || ims.mBatchEditNesting == 0) {
7570                    invalidateCursor();
7571                } else {
7572                    ims.mCursorChanged = true;
7573                }
7574            }
7575        }
7576
7577        if (what instanceof ParcelableSpan) {
7578            // If this is a span that can be sent to a remote process,
7579            // the current extract editor would be interested in it.
7580            if (ims != null && ims.mExtracting != null) {
7581                if (ims.mBatchEditNesting != 0) {
7582                    if (oldStart >= 0) {
7583                        if (ims.mChangedStart > oldStart) {
7584                            ims.mChangedStart = oldStart;
7585                        }
7586                        if (ims.mChangedStart > oldEnd) {
7587                            ims.mChangedStart = oldEnd;
7588                        }
7589                    }
7590                    if (newStart >= 0) {
7591                        if (ims.mChangedStart > newStart) {
7592                            ims.mChangedStart = newStart;
7593                        }
7594                        if (ims.mChangedStart > newEnd) {
7595                            ims.mChangedStart = newEnd;
7596                        }
7597                    }
7598                } else {
7599                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7600                            + oldStart + "-" + oldEnd + ","
7601                            + newStart + "-" + newEnd + what);
7602                    ims.mContentChanged = true;
7603                }
7604            }
7605        }
7606    }
7607
7608    private class ChangeWatcher
7609    implements TextWatcher, SpanWatcher {
7610
7611        private CharSequence mBeforeText;
7612
7613        public void beforeTextChanged(CharSequence buffer, int start,
7614                                      int before, int after) {
7615            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7616                    + " before=" + before + " after=" + after + ": " + buffer);
7617
7618            if (AccessibilityManager.getInstance(mContext).isEnabled()
7619                    && !isPasswordInputType(mInputType)
7620                    && !hasPasswordTransformationMethod()) {
7621                mBeforeText = buffer.toString();
7622            }
7623
7624            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7625        }
7626
7627        public void onTextChanged(CharSequence buffer, int start,
7628                                  int before, int after) {
7629            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7630                    + " before=" + before + " after=" + after + ": " + buffer);
7631            TextView.this.handleTextChanged(buffer, start, before, after);
7632
7633            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7634                    (isFocused() || isSelected() &&
7635                    isShown())) {
7636                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7637                mBeforeText = null;
7638            }
7639        }
7640
7641        public void afterTextChanged(Editable buffer) {
7642            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7643            TextView.this.sendAfterTextChanged(buffer);
7644
7645            if (MetaKeyKeyListener.getMetaState(buffer,
7646                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7647                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7648            }
7649        }
7650
7651        public void onSpanChanged(Spannable buf,
7652                                  Object what, int s, int e, int st, int en) {
7653            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7654                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7655            TextView.this.spanChange(buf, what, s, st, e, en);
7656        }
7657
7658        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7659            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7660                    + " what=" + what + ": " + buf);
7661            TextView.this.spanChange(buf, what, -1, s, -1, e);
7662        }
7663
7664        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7665            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7666                    + " what=" + what + ": " + buf);
7667            TextView.this.spanChange(buf, what, s, -1, e, -1);
7668        }
7669    }
7670
7671    /**
7672     * @hide
7673     */
7674    @Override
7675    public void dispatchFinishTemporaryDetach() {
7676        mDispatchTemporaryDetach = true;
7677        super.dispatchFinishTemporaryDetach();
7678        mDispatchTemporaryDetach = false;
7679    }
7680
7681    @Override
7682    public void onStartTemporaryDetach() {
7683        super.onStartTemporaryDetach();
7684        // Only track when onStartTemporaryDetach() is called directly,
7685        // usually because this instance is an editable field in a list
7686        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7687
7688        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7689        // selection becomes visible again. Until a better solution is found, stop text selection
7690        // mode (if any) as soon as this TextView is recycled.
7691        hideControllers();
7692    }
7693
7694    @Override
7695    public void onFinishTemporaryDetach() {
7696        super.onFinishTemporaryDetach();
7697        // Only track when onStartTemporaryDetach() is called directly,
7698        // usually because this instance is an editable field in a list
7699        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7700    }
7701
7702    @Override
7703    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7704        if (mTemporaryDetach) {
7705            // If we are temporarily in the detach state, then do nothing.
7706            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7707            return;
7708        }
7709
7710        mShowCursor = SystemClock.uptimeMillis();
7711
7712        ensureEndedBatchEdit();
7713
7714        if (focused) {
7715            int selStart = getSelectionStart();
7716            int selEnd = getSelectionEnd();
7717
7718            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7719            // mode for these, unless there was a specific selection already started.
7720            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7721                    selEnd == mText.length();
7722            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7723
7724            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7725                // If a tap was used to give focus to that view, move cursor at tap position.
7726                // Has to be done before onTakeFocus, which can be overloaded.
7727                final int lastTapPosition = getLastTapPosition();
7728                if (lastTapPosition >= 0) {
7729                    Selection.setSelection((Spannable) mText, lastTapPosition);
7730                }
7731
7732                if (mMovement != null) {
7733                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7734                }
7735
7736                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7737                // pressed. Since it is the ViewAncestor's mView, it requests focus before
7738                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7739                // This special case ensure that we keep current selection in that case.
7740                // It would be better to know why the DecorView does not have focus at that time.
7741                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7742                        selStart >= 0 && selEnd >= 0) {
7743                    /*
7744                     * Someone intentionally set the selection, so let them
7745                     * do whatever it is that they wanted to do instead of
7746                     * the default on-focus behavior.  We reset the selection
7747                     * here instead of just skipping the onTakeFocus() call
7748                     * because some movement methods do something other than
7749                     * just setting the selection in theirs and we still
7750                     * need to go through that path.
7751                     */
7752                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7753                }
7754
7755                if (mSelectAllOnFocus) {
7756                    selectAll();
7757                }
7758
7759                mTouchFocusSelected = true;
7760            }
7761
7762            mFrozenWithFocus = false;
7763            mSelectionMoved = false;
7764
7765            if (mText instanceof Spannable) {
7766                Spannable sp = (Spannable) mText;
7767                MetaKeyKeyListener.resetMetaState(sp);
7768            }
7769
7770            makeBlink();
7771
7772            if (mError != null) {
7773                showError();
7774            }
7775        } else {
7776            if (mError != null) {
7777                hideError();
7778            }
7779            // Don't leave us in the middle of a batch edit.
7780            onEndBatchEdit();
7781
7782            if (this instanceof ExtractEditText) {
7783                // terminateTextSelectionMode removes selection, which we want to keep when
7784                // ExtractEditText goes out of focus.
7785                final int selStart = getSelectionStart();
7786                final int selEnd = getSelectionEnd();
7787                hideControllers();
7788                Selection.setSelection((Spannable) mText, selStart, selEnd);
7789            } else {
7790                hideControllers();
7791            }
7792
7793            // No need to create the controller
7794            if (mSelectionModifierCursorController != null) {
7795                mSelectionModifierCursorController.resetTouchOffsets();
7796            }
7797        }
7798
7799        startStopMarquee(focused);
7800
7801        if (mTransformation != null) {
7802            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7803        }
7804
7805        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7806    }
7807
7808    private int getLastTapPosition() {
7809        // No need to create the controller at that point, no last tap position saved
7810        if (mSelectionModifierCursorController != null) {
7811            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7812            if (lastTapPosition >= 0) {
7813                // Safety check, should not be possible.
7814                if (lastTapPosition > mText.length()) {
7815                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7816                            + mText.length() + ")");
7817                    lastTapPosition = mText.length();
7818                }
7819                return lastTapPosition;
7820            }
7821        }
7822
7823        return -1;
7824    }
7825
7826    @Override
7827    public void onWindowFocusChanged(boolean hasWindowFocus) {
7828        super.onWindowFocusChanged(hasWindowFocus);
7829
7830        if (hasWindowFocus) {
7831            if (mBlink != null) {
7832                mBlink.uncancel();
7833                makeBlink();
7834            }
7835        } else {
7836            if (mBlink != null) {
7837                mBlink.cancel();
7838            }
7839            // Don't leave us in the middle of a batch edit.
7840            onEndBatchEdit();
7841            if (mInputContentType != null) {
7842                mInputContentType.enterDown = false;
7843            }
7844            hideControllers();
7845            removeAllSuggestionSpans();
7846        }
7847
7848        startStopMarquee(hasWindowFocus);
7849    }
7850
7851    private void removeAllSuggestionSpans() {
7852        if (mText instanceof Editable) {
7853            Editable editable = ((Editable) mText);
7854            SuggestionSpan[] spans = editable.getSpans(0, mText.length(), SuggestionSpan.class);
7855            final int length = spans.length;
7856            for (int i = 0; i < length; i++) {
7857                editable.removeSpan(spans[i]);
7858            }
7859        }
7860    }
7861
7862    @Override
7863    protected void onVisibilityChanged(View changedView, int visibility) {
7864        super.onVisibilityChanged(changedView, visibility);
7865        if (visibility != VISIBLE) {
7866            hideControllers();
7867        }
7868    }
7869
7870    /**
7871     * Use {@link BaseInputConnection#removeComposingSpans
7872     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7873     * state from this text view.
7874     */
7875    public void clearComposingText() {
7876        if (mText instanceof Spannable) {
7877            BaseInputConnection.removeComposingSpans((Spannable)mText);
7878        }
7879    }
7880
7881    @Override
7882    public void setSelected(boolean selected) {
7883        boolean wasSelected = isSelected();
7884
7885        super.setSelected(selected);
7886
7887        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7888            if (selected) {
7889                startMarquee();
7890            } else {
7891                stopMarquee();
7892            }
7893        }
7894    }
7895
7896    @Override
7897    public boolean onTouchEvent(MotionEvent event) {
7898        final int action = event.getActionMasked();
7899
7900        if (hasSelectionController()) {
7901            getSelectionController().onTouchEvent(event);
7902        }
7903
7904        if (action == MotionEvent.ACTION_DOWN) {
7905            mLastDownPositionX = event.getX();
7906            mLastDownPositionY = event.getY();
7907
7908            // Reset this state; it will be re-set if super.onTouchEvent
7909            // causes focus to move to the view.
7910            mTouchFocusSelected = false;
7911            mIgnoreActionUpEvent = false;
7912        }
7913
7914        final boolean superResult = super.onTouchEvent(event);
7915
7916        /*
7917         * Don't handle the release after a long press, because it will
7918         * move the selection away from whatever the menu action was
7919         * trying to affect.
7920         */
7921        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7922            mDiscardNextActionUp = false;
7923            return superResult;
7924        }
7925
7926        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7927                isFocused();
7928
7929        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7930                && mText instanceof Spannable && mLayout != null) {
7931            boolean handled = false;
7932
7933            if (mMovement != null) {
7934                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7935            }
7936
7937            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7938                // The LinkMovementMethod which should handle taps on links has not been installed
7939                // to support text selection. We reproduce its behavior here to open links.
7940                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7941                        getSelectionEnd(), ClickableSpan.class);
7942
7943                if (links.length != 0) {
7944                    links[0].onClick(this);
7945                    handled = true;
7946                }
7947            }
7948
7949            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7950                // Show the IME, except when selecting in read-only text.
7951                final InputMethodManager imm = InputMethodManager.peekInstance();
7952                if (imm != null) {
7953                    imm.viewClicked(this);
7954                }
7955                if (!mTextIsSelectable) {
7956                    handled |= imm != null && imm.showSoftInput(this, 0);
7957                }
7958
7959                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7960                if (!selectAllGotFocus && hasSelection()) {
7961                    startSelectionActionMode();
7962                } else {
7963                    hideControllers();
7964                    if (!selectAllGotFocus && mText.length() > 0) {
7965                        if (isCursorInsideEasyCorrectionSpan()) {
7966                            showSuggestions();
7967                        } else if (hasInsertionController()) {
7968                            getInsertionController().show();
7969                        }
7970                    }
7971                }
7972            }
7973
7974            if (handled) {
7975                return true;
7976            }
7977        }
7978
7979        return superResult;
7980    }
7981
7982    /**
7983     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
7984     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
7985     */
7986    private boolean isCursorInsideEasyCorrectionSpan() {
7987        Spannable spannable = (Spannable) TextView.this.mText;
7988        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
7989                getSelectionEnd(), SuggestionSpan.class);
7990        for (int i = 0; i < suggestionSpans.length; i++) {
7991            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
7992                return true;
7993            }
7994        }
7995        return false;
7996    }
7997
7998    @Override
7999    public boolean onGenericMotionEvent(MotionEvent event) {
8000        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8001            try {
8002                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8003                    return true;
8004                }
8005            } catch (AbstractMethodError ex) {
8006                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8007                // Ignore its absence in case third party applications implemented the
8008                // interface directly.
8009            }
8010        }
8011        return super.onGenericMotionEvent(event);
8012    }
8013
8014    private void prepareCursorControllers() {
8015        boolean windowSupportsHandles = false;
8016
8017        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8018        if (params instanceof WindowManager.LayoutParams) {
8019            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8020            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8021                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8022        }
8023
8024        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8025        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8026                mLayout != null;
8027
8028        if (!mInsertionControllerEnabled) {
8029            hideInsertionPointCursorController();
8030            if (mInsertionPointCursorController != null) {
8031                mInsertionPointCursorController.onDetached();
8032                mInsertionPointCursorController = null;
8033            }
8034        }
8035
8036        if (!mSelectionControllerEnabled) {
8037            stopSelectionActionMode();
8038            if (mSelectionModifierCursorController != null) {
8039                mSelectionModifierCursorController.onDetached();
8040                mSelectionModifierCursorController = null;
8041            }
8042        }
8043    }
8044
8045    /**
8046     * @return True iff this TextView contains a text that can be edited, or if this is
8047     * a selectable TextView.
8048     */
8049    private boolean isTextEditable() {
8050        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8051    }
8052
8053    /**
8054     * Returns true, only while processing a touch gesture, if the initial
8055     * touch down event caused focus to move to the text view and as a result
8056     * its selection changed.  Only valid while processing the touch gesture
8057     * of interest.
8058     */
8059    public boolean didTouchFocusSelect() {
8060        return mTouchFocusSelected;
8061    }
8062
8063    @Override
8064    public void cancelLongPress() {
8065        super.cancelLongPress();
8066        mIgnoreActionUpEvent = true;
8067    }
8068
8069    @Override
8070    public boolean onTrackballEvent(MotionEvent event) {
8071        if (mMovement != null && mText instanceof Spannable &&
8072            mLayout != null) {
8073            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8074                return true;
8075            }
8076        }
8077
8078        return super.onTrackballEvent(event);
8079    }
8080
8081    public void setScroller(Scroller s) {
8082        mScroller = s;
8083    }
8084
8085    private static class Blink extends Handler implements Runnable {
8086        private final WeakReference<TextView> mView;
8087        private boolean mCancelled;
8088
8089        public Blink(TextView v) {
8090            mView = new WeakReference<TextView>(v);
8091        }
8092
8093        public void run() {
8094            if (mCancelled) {
8095                return;
8096            }
8097
8098            removeCallbacks(Blink.this);
8099
8100            TextView tv = mView.get();
8101
8102            if (tv != null && tv.shouldBlink()) {
8103                if (tv.mLayout != null) {
8104                    tv.invalidateCursorPath();
8105                }
8106
8107                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8108            }
8109        }
8110
8111        void cancel() {
8112            if (!mCancelled) {
8113                removeCallbacks(Blink.this);
8114                mCancelled = true;
8115            }
8116        }
8117
8118        void uncancel() {
8119            mCancelled = false;
8120        }
8121    }
8122
8123    /**
8124     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8125     */
8126    private boolean shouldBlink() {
8127        if (!isFocused()) return false;
8128
8129        final int start = getSelectionStart();
8130        if (start < 0) return false;
8131
8132        final int end = getSelectionEnd();
8133        if (end < 0) return false;
8134
8135        return start == end;
8136    }
8137
8138    private void makeBlink() {
8139        if (isCursorVisible()) {
8140            if (shouldBlink()) {
8141                mShowCursor = SystemClock.uptimeMillis();
8142                if (mBlink == null) mBlink = new Blink(this);
8143                mBlink.removeCallbacks(mBlink);
8144                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8145            }
8146        } else {
8147            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8148        }
8149    }
8150
8151    @Override
8152    protected float getLeftFadingEdgeStrength() {
8153        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8154        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8155            if (mMarquee != null && !mMarquee.isStopped()) {
8156                final Marquee marquee = mMarquee;
8157                if (marquee.shouldDrawLeftFade()) {
8158                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8159                } else {
8160                    return 0.0f;
8161                }
8162            } else if (getLineCount() == 1) {
8163                final int layoutDirection = getResolvedLayoutDirection();
8164                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8165                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8166                    case Gravity.LEFT:
8167                        return 0.0f;
8168                    case Gravity.RIGHT:
8169                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8170                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8171                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8172                    case Gravity.CENTER_HORIZONTAL:
8173                        return 0.0f;
8174                }
8175            }
8176        }
8177        return super.getLeftFadingEdgeStrength();
8178    }
8179
8180    @Override
8181    protected float getRightFadingEdgeStrength() {
8182        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8183        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8184            if (mMarquee != null && !mMarquee.isStopped()) {
8185                final Marquee marquee = mMarquee;
8186                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8187            } else if (getLineCount() == 1) {
8188                final int layoutDirection = getResolvedLayoutDirection();
8189                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8190                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8191                    case Gravity.LEFT:
8192                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8193                                getCompoundPaddingRight();
8194                        final float lineWidth = mLayout.getLineWidth(0);
8195                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8196                    case Gravity.RIGHT:
8197                        return 0.0f;
8198                    case Gravity.CENTER_HORIZONTAL:
8199                    case Gravity.FILL_HORIZONTAL:
8200                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8201                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8202                                getHorizontalFadingEdgeLength();
8203                }
8204            }
8205        }
8206        return super.getRightFadingEdgeStrength();
8207    }
8208
8209    @Override
8210    protected int computeHorizontalScrollRange() {
8211        if (mLayout != null) {
8212            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8213                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8214        }
8215
8216        return super.computeHorizontalScrollRange();
8217    }
8218
8219    @Override
8220    protected int computeVerticalScrollRange() {
8221        if (mLayout != null)
8222            return mLayout.getHeight();
8223
8224        return super.computeVerticalScrollRange();
8225    }
8226
8227    @Override
8228    protected int computeVerticalScrollExtent() {
8229        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8230    }
8231
8232    @Override
8233    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched) {
8234        if (TextUtils.isEmpty(searched)) {
8235            return;
8236        }
8237        CharSequence thisText = getText();
8238        if (TextUtils.isEmpty(thisText)) {
8239            return;
8240        }
8241        String searchedLowerCase = searched.toString().toLowerCase();
8242        String thisTextLowerCase = thisText.toString().toLowerCase();
8243        if (thisTextLowerCase.contains(searchedLowerCase)) {
8244            outViews.add(this);
8245        }
8246    }
8247
8248    public enum BufferType {
8249        NORMAL, SPANNABLE, EDITABLE,
8250    }
8251
8252    /**
8253     * Returns the TextView_textColor attribute from the
8254     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8255     * from the TextView_textAppearance attribute, if TextView_textColor
8256     * was not set directly.
8257     */
8258    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8259        ColorStateList colors;
8260        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8261                                         TextView_textColor);
8262
8263        if (colors == null) {
8264            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8265                                         TextView_textAppearance, -1);
8266            if (ap != -1) {
8267                TypedArray appearance;
8268                appearance = context.obtainStyledAttributes(ap,
8269                                            com.android.internal.R.styleable.TextAppearance);
8270                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8271                                                  TextAppearance_textColor);
8272                appearance.recycle();
8273            }
8274        }
8275
8276        return colors;
8277    }
8278
8279    /**
8280     * Returns the default color from the TextView_textColor attribute
8281     * from the AttributeSet, if set, or the default color from the
8282     * TextAppearance_textColor from the TextView_textAppearance attribute,
8283     * if TextView_textColor was not set directly.
8284     */
8285    public static int getTextColor(Context context,
8286                                   TypedArray attrs,
8287                                   int def) {
8288        ColorStateList colors = getTextColors(context, attrs);
8289
8290        if (colors == null) {
8291            return def;
8292        } else {
8293            return colors.getDefaultColor();
8294        }
8295    }
8296
8297    @Override
8298    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8299        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8300        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8301            switch (keyCode) {
8302            case KeyEvent.KEYCODE_A:
8303                if (canSelectText()) {
8304                    return onTextContextMenuItem(ID_SELECT_ALL);
8305                }
8306                break;
8307            case KeyEvent.KEYCODE_X:
8308                if (canCut()) {
8309                    return onTextContextMenuItem(ID_CUT);
8310                }
8311                break;
8312            case KeyEvent.KEYCODE_C:
8313                if (canCopy()) {
8314                    return onTextContextMenuItem(ID_COPY);
8315                }
8316                break;
8317            case KeyEvent.KEYCODE_V:
8318                if (canPaste()) {
8319                    return onTextContextMenuItem(ID_PASTE);
8320                }
8321                break;
8322            }
8323        }
8324        return super.onKeyShortcut(keyCode, event);
8325    }
8326
8327    /**
8328     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8329     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8330     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8331     */
8332    private boolean canSelectText() {
8333        return hasSelectionController() && mText.length() != 0;
8334    }
8335
8336    /**
8337     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8338     * The text must be spannable and the movement method must allow for arbitary selection.
8339     *
8340     * See also {@link #canSelectText()}.
8341     */
8342    private boolean textCanBeSelected() {
8343        // prepareCursorController() relies on this method.
8344        // If you change this condition, make sure prepareCursorController is called anywhere
8345        // the value of this condition might be changed.
8346        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8347        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8348    }
8349
8350    private boolean canCut() {
8351        if (hasPasswordTransformationMethod()) {
8352            return false;
8353        }
8354
8355        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8356            return true;
8357        }
8358
8359        return false;
8360    }
8361
8362    private boolean canCopy() {
8363        if (hasPasswordTransformationMethod()) {
8364            return false;
8365        }
8366
8367        if (mText.length() > 0 && hasSelection()) {
8368            return true;
8369        }
8370
8371        return false;
8372    }
8373
8374    private boolean canPaste() {
8375        return (mText instanceof Editable &&
8376                mInput != null &&
8377                getSelectionStart() >= 0 &&
8378                getSelectionEnd() >= 0 &&
8379                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8380                hasPrimaryClip());
8381    }
8382
8383    private static long packRangeInLong(int start, int end) {
8384        return (((long) start) << 32) | end;
8385    }
8386
8387    private static int extractRangeStartFromLong(long range) {
8388        return (int) (range >>> 32);
8389    }
8390
8391    private static int extractRangeEndFromLong(long range) {
8392        return (int) (range & 0x00000000FFFFFFFFL);
8393    }
8394
8395    private boolean selectAll() {
8396        final int length = mText.length();
8397        Selection.setSelection((Spannable) mText, 0, length);
8398        return length > 0;
8399    }
8400
8401    /**
8402     * Adjusts selection to the word under last touch offset.
8403     * Return true if the operation was successfully performed.
8404     */
8405    private boolean selectCurrentWord() {
8406        if (!canSelectText()) {
8407            return false;
8408        }
8409
8410        if (hasPasswordTransformationMethod()) {
8411            // Always select all on a password field.
8412            // Cut/copy menu entries are not available for passwords, but being able to select all
8413            // is however useful to delete or paste to replace the entire content.
8414            return selectAll();
8415        }
8416
8417        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8418        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8419
8420        // Specific text field types: select the entire text for these
8421        if (klass == InputType.TYPE_CLASS_NUMBER ||
8422                klass == InputType.TYPE_CLASS_PHONE ||
8423                klass == InputType.TYPE_CLASS_DATETIME ||
8424                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8425                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8426                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8427                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8428            return selectAll();
8429        }
8430
8431        long lastTouchOffsets = getLastTouchOffsets();
8432        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8433        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8434
8435        // Safety check in case standard touch event handling has been bypassed
8436        if (minOffset < 0 || minOffset >= mText.length()) return false;
8437        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8438
8439        int selectionStart, selectionEnd;
8440
8441        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8442        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8443        if (urlSpans.length == 1) {
8444            URLSpan url = urlSpans[0];
8445            selectionStart = ((Spanned) mText).getSpanStart(url);
8446            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8447        } else {
8448            if (mWordIterator == null) {
8449                mWordIterator = new WordIterator();
8450            }
8451            // WordIerator handles text changes, this is a no-op if text in unchanged.
8452            mWordIterator.setCharSequence(mText);
8453
8454            selectionStart = mWordIterator.getBeginning(minOffset);
8455            if (selectionStart == BreakIterator.DONE) return false;
8456
8457            selectionEnd = mWordIterator.getEnd(maxOffset);
8458            if (selectionEnd == BreakIterator.DONE) return false;
8459        }
8460
8461        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8462        return true;
8463    }
8464
8465    private long getLastTouchOffsets() {
8466        int minOffset, maxOffset;
8467
8468        if (mContextMenuTriggeredByKey) {
8469            minOffset = getSelectionStart();
8470            maxOffset = getSelectionEnd();
8471        } else {
8472            SelectionModifierCursorController selectionController = getSelectionController();
8473            minOffset = selectionController.getMinTouchOffset();
8474            maxOffset = selectionController.getMaxTouchOffset();
8475        }
8476
8477        return packRangeInLong(minOffset, maxOffset);
8478    }
8479
8480    @Override
8481    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8482        super.onPopulateAccessibilityEvent(event);
8483
8484        final boolean isPassword = hasPasswordTransformationMethod();
8485        if (!isPassword) {
8486            CharSequence text = getText();
8487            if (TextUtils.isEmpty(text)) {
8488                text = getHint();
8489            }
8490            if (TextUtils.isEmpty(text)) {
8491                text = getContentDescription();
8492            }
8493            if (!TextUtils.isEmpty(text)) {
8494                event.getText().add(text);
8495            }
8496        }
8497    }
8498
8499    @Override
8500    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8501        super.onInitializeAccessibilityEvent(event);
8502
8503        final boolean isPassword = hasPasswordTransformationMethod();
8504        event.setPassword(isPassword);
8505
8506        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8507            event.setFromIndex(Selection.getSelectionStart(mText));
8508            event.setToIndex(Selection.getSelectionEnd(mText));
8509            event.setItemCount(mText.length());
8510        }
8511    }
8512
8513    @Override
8514    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
8515        super.onInitializeAccessibilityNodeInfo(info);
8516
8517        final boolean isPassword = hasPasswordTransformationMethod();
8518        if (!isPassword) {
8519            info.setText(getText());
8520        }
8521        info.setPassword(isPassword);
8522    }
8523
8524    @Override
8525    public void sendAccessibilityEvent(int eventType) {
8526        // Do not send scroll events since first they are not interesting for
8527        // accessibility and second such events a generated too frequently.
8528        // For details see the implementation of bringTextIntoView().
8529        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
8530            return;
8531        }
8532        super.sendAccessibilityEvent(eventType);
8533    }
8534
8535    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8536            int fromIndex, int removedCount, int addedCount) {
8537        AccessibilityEvent event =
8538            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8539        event.setFromIndex(fromIndex);
8540        event.setRemovedCount(removedCount);
8541        event.setAddedCount(addedCount);
8542        event.setBeforeText(beforeText);
8543        sendAccessibilityEventUnchecked(event);
8544    }
8545
8546    @Override
8547    protected void onCreateContextMenu(ContextMenu menu) {
8548        super.onCreateContextMenu(menu);
8549        boolean added = false;
8550        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
8551        // Problem with context menu on long press: the menu appears while the key in down and when
8552        // the key is released, the view does not receive the key_up event.
8553        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
8554        // events. We cannot simply clear these flags in onTextContextMenuItem since
8555        // it may not be called (if the user/ discards the context menu with the back key).
8556        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
8557        // available in onTextContextMenuItem.
8558        mDPadCenterIsDown = mEnterKeyIsDown = false;
8559
8560        MenuHandler handler = new MenuHandler();
8561
8562        if (mText instanceof Spanned && hasSelectionController()) {
8563            long lastTouchOffset = getLastTouchOffsets();
8564            final int selStart = extractRangeStartFromLong(lastTouchOffset);
8565            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
8566
8567            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
8568            if (urls.length > 0) {
8569                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
8570                        setOnMenuItemClickListener(handler);
8571
8572                added = true;
8573            }
8574        }
8575
8576        // The context menu is not empty, which will prevent the selection mode from starting.
8577        // Add a entry to start it in the context menu.
8578        // TODO Does not handle the case where a subclass does not call super.thisMethod or
8579        // populates the menu AFTER this call.
8580        if (menu.size() > 0) {
8581            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
8582                    setOnMenuItemClickListener(handler);
8583            added = true;
8584        }
8585
8586        if (added) {
8587            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
8588        }
8589    }
8590
8591    /**
8592     * Returns whether this text view is a current input method target.  The
8593     * default implementation just checks with {@link InputMethodManager}.
8594     */
8595    public boolean isInputMethodTarget() {
8596        InputMethodManager imm = InputMethodManager.peekInstance();
8597        return imm != null && imm.isActive(this);
8598    }
8599
8600    // Selection context mode
8601    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8602    private static final int ID_CUT = android.R.id.cut;
8603    private static final int ID_COPY = android.R.id.copy;
8604    private static final int ID_PASTE = android.R.id.paste;
8605    // Context menu entries
8606    private static final int ID_COPY_URL = android.R.id.copyUrl;
8607    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8608
8609    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8610        public boolean onMenuItemClick(MenuItem item) {
8611            return onTextContextMenuItem(item.getItemId());
8612        }
8613    }
8614
8615    /**
8616     * Called when a context menu option for the text view is selected.  Currently
8617     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8618     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8619     * or {@link android.R.id#copy}.
8620     *
8621     * @return true if the context menu item action was performed.
8622     */
8623    public boolean onTextContextMenuItem(int id) {
8624        int min = 0;
8625        int max = mText.length();
8626
8627        if (isFocused()) {
8628            final int selStart = getSelectionStart();
8629            final int selEnd = getSelectionEnd();
8630
8631            min = Math.max(0, Math.min(selStart, selEnd));
8632            max = Math.max(0, Math.max(selStart, selEnd));
8633        }
8634
8635        switch (id) {
8636            case ID_COPY_URL:
8637                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8638                if (urls.length >= 1) {
8639                    ClipData clip = null;
8640                    for (int i=0; i<urls.length; i++) {
8641                        Uri uri = Uri.parse(urls[0].getURL());
8642                        if (clip == null) {
8643                            clip = ClipData.newRawUri(null, uri);
8644                        } else {
8645                            clip.addItem(new ClipData.Item(uri));
8646                        }
8647                    }
8648                    if (clip != null) {
8649                        setPrimaryClip(clip);
8650                    }
8651                }
8652                stopSelectionActionMode();
8653                return true;
8654
8655            case ID_SELECTION_MODE:
8656                if (mSelectionActionMode != null) {
8657                    // Selection mode is already started, simply change selected part.
8658                    selectCurrentWord();
8659                } else {
8660                    startSelectionActionMode();
8661                }
8662                return true;
8663
8664            case ID_SELECT_ALL:
8665                // This does not enter text selection mode. Text is highlighted, so that it can be
8666                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8667                selectAll();
8668                return true;
8669
8670            case ID_PASTE:
8671                paste(min, max);
8672                return true;
8673
8674            case ID_CUT:
8675                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8676                ((Editable) mText).delete(min, max);
8677                stopSelectionActionMode();
8678                return true;
8679
8680            case ID_COPY:
8681                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8682                stopSelectionActionMode();
8683                return true;
8684        }
8685        return false;
8686    }
8687
8688    /**
8689     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8690     * by [min, max] when replacing this region by paste.
8691     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8692     * make sure we do not add an extra one from the paste content.
8693     */
8694    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8695        if (paste.length() > 0) {
8696            if (min > 0) {
8697                final char charBefore = mTransformed.charAt(min - 1);
8698                final char charAfter = paste.charAt(0);
8699
8700                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8701                    // Two spaces at beginning of paste: remove one
8702                    final int originalLength = mText.length();
8703                    ((Editable) mText).delete(min - 1, min);
8704                    // Due to filters, there is no guarantee that exactly one character was
8705                    // removed: count instead.
8706                    final int delta = mText.length() - originalLength;
8707                    min += delta;
8708                    max += delta;
8709                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8710                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8711                    // No space at beginning of paste: add one
8712                    final int originalLength = mText.length();
8713                    ((Editable) mText).replace(min, min, " ");
8714                    // Taking possible filters into account as above.
8715                    final int delta = mText.length() - originalLength;
8716                    min += delta;
8717                    max += delta;
8718                }
8719            }
8720
8721            if (max < mText.length()) {
8722                final char charBefore = paste.charAt(paste.length() - 1);
8723                final char charAfter = mTransformed.charAt(max);
8724
8725                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8726                    // Two spaces at end of paste: remove one
8727                    ((Editable) mText).delete(max, max + 1);
8728                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8729                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8730                    // No space at end of paste: add one
8731                    ((Editable) mText).replace(max, max, " ");
8732                }
8733            }
8734        }
8735
8736        return packRangeInLong(min, max);
8737    }
8738
8739    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8740        TextView shadowView = (TextView) inflate(mContext,
8741                com.android.internal.R.layout.text_drag_thumbnail, null);
8742
8743        if (shadowView == null) {
8744            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8745        }
8746
8747        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8748            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8749        }
8750        shadowView.setText(text);
8751        shadowView.setTextColor(getTextColors());
8752
8753        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8754        shadowView.setGravity(Gravity.CENTER);
8755
8756        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8757                ViewGroup.LayoutParams.WRAP_CONTENT));
8758
8759        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8760        shadowView.measure(size, size);
8761
8762        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8763        shadowView.invalidate();
8764        return new DragShadowBuilder(shadowView);
8765    }
8766
8767    private static class DragLocalState {
8768        public TextView sourceTextView;
8769        public int start, end;
8770
8771        public DragLocalState(TextView sourceTextView, int start, int end) {
8772            this.sourceTextView = sourceTextView;
8773            this.start = start;
8774            this.end = end;
8775        }
8776    }
8777
8778    @Override
8779    public boolean performLongClick() {
8780        if (super.performLongClick()) {
8781            mDiscardNextActionUp = true;
8782            return true;
8783        }
8784
8785        boolean handled = false;
8786
8787        // Long press in empty space moves cursor and shows the Paste affordance if available.
8788        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8789                mInsertionControllerEnabled) {
8790            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
8791            stopSelectionActionMode();
8792            Selection.setSelection((Spannable) mText, offset);
8793            getInsertionController().showImmediately();
8794            handled = true;
8795        }
8796
8797        if (!handled && mSelectionActionMode != null) {
8798            if (touchPositionIsInSelection()) {
8799                // Start a drag
8800                final int start = getSelectionStart();
8801                final int end = getSelectionEnd();
8802                CharSequence selectedText = mTransformed.subSequence(start, end);
8803                ClipData data = ClipData.newPlainText(null, selectedText);
8804                DragLocalState localState = new DragLocalState(this, start, end);
8805                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8806                stopSelectionActionMode();
8807            } else {
8808                selectCurrentWord();
8809            }
8810            handled = true;
8811        }
8812
8813        // Start a new selection
8814        handled |= !handled && startSelectionActionMode();
8815
8816        if (handled) {
8817            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8818            mDiscardNextActionUp = true;
8819        }
8820
8821        return handled;
8822    }
8823
8824    private boolean touchPositionIsInSelection() {
8825        int selectionStart = getSelectionStart();
8826        int selectionEnd = getSelectionEnd();
8827
8828        if (selectionStart == selectionEnd) {
8829            return false;
8830        }
8831
8832        if (selectionStart > selectionEnd) {
8833            int tmp = selectionStart;
8834            selectionStart = selectionEnd;
8835            selectionEnd = tmp;
8836            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8837        }
8838
8839        SelectionModifierCursorController selectionController = getSelectionController();
8840        int minOffset = selectionController.getMinTouchOffset();
8841        int maxOffset = selectionController.getMaxTouchOffset();
8842
8843        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8844    }
8845
8846    private PositionListener getPositionListener() {
8847        if (mPositionListener == null) {
8848            mPositionListener = new PositionListener();
8849        }
8850        return mPositionListener;
8851    }
8852
8853    private interface TextViewPositionListener {
8854        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified);
8855    }
8856
8857    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
8858        // 3 handles, 2 ActionPopup (suggestionsPopup first hides the others)
8859        private final int MAXIMUM_NUMBER_OF_LISTENERS = 5;
8860        private TextViewPositionListener[] mPositionListeners =
8861                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
8862        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
8863        private boolean mPositionHasChanged = true;
8864        // Absolute position of the TextView with respect to its parent window
8865        private int mPositionX, mPositionY;
8866        private int mNumberOfListeners;
8867
8868        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
8869            if (mNumberOfListeners == 0) {
8870                updatePosition();
8871                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8872                vto.addOnPreDrawListener(this);
8873            }
8874
8875            int emptySlotIndex = -1;
8876            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8877                TextViewPositionListener listener = mPositionListeners[i];
8878                if (listener == positionListener) {
8879                    return;
8880                } else if (emptySlotIndex < 0 && listener == null) {
8881                    emptySlotIndex = i;
8882                }
8883            }
8884
8885            mPositionListeners[emptySlotIndex] = positionListener;
8886            mCanMove[emptySlotIndex] = canMove;
8887            mNumberOfListeners++;
8888        }
8889
8890        public void removeSubscriber(TextViewPositionListener positionListener) {
8891            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8892                if (mPositionListeners[i] == positionListener) {
8893                    mPositionListeners[i] = null;
8894                    mNumberOfListeners--;
8895                    break;
8896                }
8897            }
8898
8899            if (mNumberOfListeners == 0) {
8900                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8901                vto.removeOnPreDrawListener(this);
8902            }
8903        }
8904
8905        public int getPositionX() {
8906            return mPositionX;
8907        }
8908
8909        public int getPositionY() {
8910            return mPositionY;
8911        }
8912
8913        @Override
8914        public boolean onPreDraw() {
8915            updatePosition();
8916
8917            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8918                if (mPositionHasChanged || mCanMove[i]) {
8919                    TextViewPositionListener positionListener = mPositionListeners[i];
8920                    if (positionListener != null) {
8921                        positionListener.updatePosition(mPositionX, mPositionY,
8922                                mPositionHasChanged);
8923                    }
8924                }
8925            }
8926
8927            return true;
8928        }
8929
8930        private void updatePosition() {
8931            TextView.this.getLocationInWindow(mTempCoords);
8932
8933            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
8934
8935            mPositionX = mTempCoords[0];
8936            mPositionY = mTempCoords[1];
8937        }
8938
8939        public boolean isVisible(int positionX, int positionY) {
8940            final TextView textView = TextView.this;
8941
8942            if (mTempRect == null) mTempRect = new Rect();
8943            final Rect clip = mTempRect;
8944            clip.left = getCompoundPaddingLeft();
8945            clip.top = getExtendedPaddingTop();
8946            clip.right = textView.getWidth() - getCompoundPaddingRight();
8947            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
8948
8949            final ViewParent parent = textView.getParent();
8950            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
8951                return false;
8952            }
8953
8954            int posX = mPositionX + positionX;
8955            int posY = mPositionY + positionY;
8956
8957            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
8958            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
8959                    posY >= clip.top && posY <= clip.bottom;
8960        }
8961
8962        public boolean isOffsetVisible(int offset) {
8963            final int line = mLayout.getLineForOffset(offset);
8964            final int lineBottom = mLayout.getLineBottom(line);
8965            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
8966            return isVisible(primaryHorizontal, lineBottom);
8967        }
8968    }
8969
8970    private abstract class PinnedPopupWindow implements TextViewPositionListener {
8971        protected PopupWindow mPopupWindow;
8972        protected LinearLayout mContentView;
8973        int mPositionX, mPositionY;
8974
8975        protected abstract void createPopupWindow();
8976        protected abstract void initContentView();
8977        protected abstract int getTextOffset();
8978        protected abstract int getVerticalLocalPosition(int line);
8979        protected abstract int clipVertically(int positionY);
8980
8981        public PinnedPopupWindow() {
8982            createPopupWindow();
8983
8984            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8985            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8986            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8987
8988            mContentView = new LinearLayout(TextView.this.getContext());
8989            LayoutParams wrapContent = new LayoutParams(
8990                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
8991            mContentView.setLayoutParams(wrapContent);
8992
8993            initContentView();
8994            mPopupWindow.setContentView(mContentView);
8995        }
8996
8997        public void show() {
8998            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
8999            mContentView.measure(
9000                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9001                            View.MeasureSpec.AT_MOST),
9002                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9003                            View.MeasureSpec.AT_MOST));
9004
9005            TextView.this.getPositionListener().addSubscriber(this, false);
9006
9007            computeLocalPosition();
9008
9009            final PositionListener positionListener = TextView.this.getPositionListener();
9010            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9011        }
9012
9013        private void computeLocalPosition() {
9014            final int offset = getTextOffset();
9015
9016            final int width = mContentView.getMeasuredWidth();
9017            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9018            mPositionX += viewportToContentHorizontalOffset();
9019
9020            final int line = mLayout.getLineForOffset(offset);
9021            mPositionY = getVerticalLocalPosition(line);
9022            mPositionY += viewportToContentVerticalOffset();
9023        }
9024
9025        private void updatePosition(int parentPositionX, int parentPositionY) {
9026            int positionX = parentPositionX + mPositionX;
9027            int positionY = parentPositionY + mPositionY;
9028
9029            positionY = clipVertically(positionY);
9030
9031            // Horizontal clipping
9032            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9033            final int width = mContentView.getMeasuredWidth();
9034            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9035            positionX = Math.max(0, positionX);
9036
9037            if (isShowing()) {
9038                mPopupWindow.update(positionX, positionY, -1, -1);
9039            } else {
9040                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9041                        positionX, positionY);
9042            }
9043        }
9044
9045        public void hide() {
9046            mPopupWindow.dismiss();
9047            TextView.this.getPositionListener().removeSubscriber(this);
9048        }
9049
9050        @Override
9051        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
9052            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
9053                updatePosition(parentPositionX, parentPositionY);
9054            } else {
9055                hide();
9056            }
9057        }
9058
9059        public boolean isShowing() {
9060            return mPopupWindow.isShowing();
9061        }
9062    }
9063
9064    private static class SuggestionRangeSpan extends UnderlineSpan {
9065        // TODO themable, would be nice to make it a child class of TextAppearanceSpan, but
9066        // there is no way to have underline and TextAppearanceSpan.
9067    }
9068
9069    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnClickListener {
9070        private static final int MAX_NUMBER_SUGGESTIONS = 5;
9071        private static final int NO_SUGGESTIONS = -1;
9072        private WordIterator mSuggestionWordIterator;
9073        private TextAppearanceSpan[] mHighlightSpans = new TextAppearanceSpan[0];
9074
9075        @Override
9076        protected void createPopupWindow() {
9077            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9078                com.android.internal.R.attr.textSuggestionsWindowStyle);
9079            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9080            mPopupWindow.setOutsideTouchable(true);
9081            mPopupWindow.setClippingEnabled(false);
9082        }
9083
9084        @Override
9085        protected void initContentView() {
9086            mContentView.setOrientation(LinearLayout.VERTICAL);
9087
9088            LayoutInflater inflater = (LayoutInflater) TextView.this.mContext.
9089                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9090
9091            if (inflater == null) {
9092                throw new IllegalArgumentException(
9093                        "Unable to create inflater for TextEdit suggestions");
9094            }
9095
9096            // Inflate the suggestion items once and for all.
9097            for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
9098                View childView = inflater.inflate(mTextEditSuggestionItemLayout,
9099                        mContentView, false);
9100
9101                if (! (childView instanceof TextView)) {
9102                    throw new IllegalArgumentException(
9103                            "Inflated TextEdit suggestion item is not a TextView: " + childView);
9104                }
9105
9106                childView.setTag(new SuggestionInfo());
9107                mContentView.addView(childView);
9108                childView.setOnClickListener(this);
9109            }
9110        }
9111
9112        private class SuggestionInfo {
9113            int suggestionStart, suggestionEnd; // range of suggestion item with replacement text
9114            int spanStart, spanEnd; // range in TextView where text should be inserted
9115            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9116            int suggestionIndex; // the index of the suggestion inside suggestionSpan
9117        }
9118
9119        /**
9120         * Returns the suggestion spans that cover the current cursor position. The suggestion
9121         * spans are sorted according to the length of text that they are attached to.
9122         */
9123        private SuggestionSpan[] getSuggestionSpans() {
9124            int pos = TextView.this.getSelectionStart();
9125            Spannable spannable = (Spannable) TextView.this.mText;
9126            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9127
9128            // Cache the span length for performance reason.
9129            final HashMap<SuggestionSpan, Integer> spansLengths =
9130                    new HashMap<SuggestionSpan, Integer>();
9131
9132            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9133                int start = spannable.getSpanStart(suggestionSpan);
9134                int end = spannable.getSpanEnd(suggestionSpan);
9135                spansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9136            }
9137
9138            // The suggestions are sorted according to the lenght of the text that they cover
9139            // (shorter first)
9140            Arrays.sort(suggestionSpans, new Comparator<SuggestionSpan>() {
9141                public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9142                    return spansLengths.get(span1).intValue() - spansLengths.get(span2).intValue();
9143                }
9144            });
9145
9146            return suggestionSpans;
9147        }
9148
9149        @Override
9150        public void show() {
9151            if (!(mText instanceof Editable)) return;
9152            updateSuggestions();
9153
9154            super.show();
9155        }
9156
9157        @Override
9158        protected int getTextOffset() {
9159            return getSelectionStart();
9160        }
9161
9162        @Override
9163        protected int getVerticalLocalPosition(int line) {
9164            return mLayout.getLineBottom(line);
9165        }
9166
9167        @Override
9168        protected int clipVertically(int positionY) {
9169            final int height = mContentView.getMeasuredHeight();
9170            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9171            return Math.min(positionY, displayMetrics.heightPixels - height);
9172        }
9173
9174        @Override
9175        public void hide() {
9176            super.hide();
9177            if ((mText instanceof Editable) && mSuggestionRangeSpan != null) {
9178                ((Editable) mText).removeSpan(mSuggestionRangeSpan);
9179            }
9180        }
9181
9182        private void updateSuggestions() {
9183            Spannable spannable = (Spannable)TextView.this.mText;
9184            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9185
9186            final int nbSpans = suggestionSpans.length;
9187
9188            int totalNbSuggestions = 0;
9189            int spanUnionStart = mText.length();
9190            int spanUnionEnd = 0;
9191
9192            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9193                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9194                final int spanStart = spannable.getSpanStart(suggestionSpan);
9195                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9196                spanUnionStart = Math.min(spanStart, spanUnionStart);
9197                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9198
9199                String[] suggestions = suggestionSpan.getSuggestions();
9200                int nbSuggestions = suggestions.length;
9201                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9202                    TextView textView = (TextView) mContentView.getChildAt(
9203                            totalNbSuggestions);
9204                    textView.setText(suggestions[suggestionIndex]);
9205                    SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9206                    suggestionInfo.spanStart = spanStart;
9207                    suggestionInfo.spanEnd = spanEnd;
9208                    suggestionInfo.suggestionSpan = suggestionSpan;
9209                    suggestionInfo.suggestionIndex = suggestionIndex;
9210
9211                    totalNbSuggestions++;
9212                    if (totalNbSuggestions == MAX_NUMBER_SUGGESTIONS) {
9213                        // Also end outer for loop
9214                        spanIndex = nbSpans;
9215                        break;
9216                    }
9217                }
9218            }
9219
9220            if (totalNbSuggestions == 0) {
9221                // TODO Replace by final text, use a dedicated layout, add a fade out timer...
9222                TextView textView = (TextView) mContentView.getChildAt(0);
9223                textView.setText("No suggestions available");
9224                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9225                suggestionInfo.spanStart = NO_SUGGESTIONS;
9226                totalNbSuggestions++;
9227            } else {
9228                if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9229                ((Editable) mText).setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9230                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9231
9232                for (int i = 0; i < totalNbSuggestions; i++) {
9233                    final TextView textView = (TextView) mContentView.getChildAt(i);
9234                    highlightTextDifferences(textView, spanUnionStart, spanUnionEnd);
9235                }
9236            }
9237
9238            for (int i = 0; i < totalNbSuggestions; i++) {
9239                mContentView.getChildAt(i).setVisibility(VISIBLE);
9240            }
9241            for (int i = totalNbSuggestions; i < MAX_NUMBER_SUGGESTIONS; i++) {
9242                mContentView.getChildAt(i).setVisibility(GONE);
9243            }
9244        }
9245
9246        private long[] getWordLimits(CharSequence text) {
9247            // TODO locale for mSuggestionWordIterator
9248            if (mSuggestionWordIterator == null) mSuggestionWordIterator = new WordIterator();
9249            mSuggestionWordIterator.setCharSequence(text);
9250
9251            // First pass will simply count the number of words to be able to create an array
9252            // Not too expensive since previous break positions are cached by the BreakIterator
9253            int nbWords = 0;
9254            int position = mSuggestionWordIterator.following(0);
9255            while (position != BreakIterator.DONE) {
9256                nbWords++;
9257                position = mSuggestionWordIterator.following(position);
9258            }
9259
9260            int index = 0;
9261            long[] result = new long[nbWords];
9262
9263            position = mSuggestionWordIterator.following(0);
9264            while (position != BreakIterator.DONE) {
9265                int wordStart = mSuggestionWordIterator.getBeginning(position);
9266                result[index++] = packRangeInLong(wordStart, position);
9267                position = mSuggestionWordIterator.following(position);
9268            }
9269
9270            return result;
9271        }
9272
9273        private TextAppearanceSpan highlightSpan(int index) {
9274            final int length = mHighlightSpans.length;
9275            if (index < length) {
9276                return mHighlightSpans[index];
9277            }
9278
9279            // Assumes indexes are requested in sequence: simply append one more item
9280            TextAppearanceSpan[] newArray = new TextAppearanceSpan[length + 1];
9281            System.arraycopy(mHighlightSpans, 0, newArray, 0, length);
9282            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9283                    android.R.style.TextAppearance_SuggestionHighlight);
9284            newArray[length] = highlightSpan;
9285            mHighlightSpans = newArray;
9286            return highlightSpan;
9287        }
9288
9289        private void highlightTextDifferences(TextView textView, int unionStart, int unionEnd) {
9290            SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9291            final int spanStart = suggestionInfo.spanStart;
9292            final int spanEnd = suggestionInfo.spanEnd;
9293
9294            // Remove all text formating by converting to Strings
9295            final String text = textView.getText().toString();
9296            final String sourceText = mText.subSequence(spanStart, spanEnd).toString();
9297
9298            long[] sourceWordLimits = getWordLimits(sourceText);
9299            long[] wordLimits = getWordLimits(text);
9300
9301            SpannableStringBuilder ssb = new SpannableStringBuilder();
9302            // span [spanStart, spanEnd] is included in union [spanUnionStart, int spanUnionEnd]
9303            // The final result is made of 3 parts: the text before, between and after the span
9304            // This is the text before, provided for context
9305            ssb.append(mText.subSequence(unionStart, spanStart).toString());
9306
9307            // shift is used to offset spans positions wrt span's beginning
9308            final int shift = spanStart - unionStart;
9309            suggestionInfo.suggestionStart = shift;
9310            suggestionInfo.suggestionEnd = shift + text.length();
9311
9312            // This is the actual suggestion text, which will be highlighted by the following code
9313            ssb.append(text);
9314
9315            String[] words = new String[wordLimits.length];
9316            for (int i = 0; i < wordLimits.length; i++) {
9317                int wordStart = extractRangeStartFromLong(wordLimits[i]);
9318                int wordEnd = extractRangeEndFromLong(wordLimits[i]);
9319                words[i] = text.substring(wordStart, wordEnd);
9320            }
9321
9322            // Highlighted word algorithm is based on word matching between source and text
9323            // Matching words are found from left to right. TODO: change for RTL languages
9324            // Characters between matching words are highlighted
9325            int previousCommonWordIndex = -1;
9326            int nbHighlightSpans = 0;
9327            for (int i = 0; i < sourceWordLimits.length; i++) {
9328                int wordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9329                int wordEnd = extractRangeEndFromLong(sourceWordLimits[i]);
9330                String sourceWord = sourceText.substring(wordStart, wordEnd);
9331
9332                for (int j = previousCommonWordIndex + 1; j < words.length; j++) {
9333                    if (sourceWord.equals(words[j])) {
9334                        if (j != previousCommonWordIndex + 1) {
9335                            int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9336                                extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9337                            int lastDifferentPosition = extractRangeStartFromLong(wordLimits[j]);
9338                            ssb.setSpan(highlightSpan(nbHighlightSpans++),
9339                                    shift + firstDifferentPosition, shift + lastDifferentPosition,
9340                                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9341                        } else {
9342                            // Compare characters between words
9343                            int previousSourceWordEnd = i == 0 ? 0 :
9344                                extractRangeEndFromLong(sourceWordLimits[i - 1]);
9345                            int sourceWordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9346                            String sourceSpaces = sourceText.substring(previousSourceWordEnd,
9347                                    sourceWordStart);
9348
9349                            int previousWordEnd = j == 0 ? 0 :
9350                                extractRangeEndFromLong(wordLimits[j - 1]);
9351                            int currentWordStart = extractRangeStartFromLong(wordLimits[j]);
9352                            String textSpaces = text.substring(previousWordEnd, currentWordStart);
9353
9354                            if (!sourceSpaces.equals(textSpaces)) {
9355                                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9356                                        shift + previousWordEnd, shift + currentWordStart,
9357                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9358                            }
9359                        }
9360                        previousCommonWordIndex = j;
9361                        break;
9362                    }
9363                }
9364            }
9365
9366            // Finally, compare ends of Strings
9367            if (previousCommonWordIndex < words.length - 1) {
9368                int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9369                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9370                int lastDifferentPosition = textView.length();
9371                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9372                        shift + firstDifferentPosition, shift + lastDifferentPosition,
9373                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9374            } else {
9375                int lastSourceWordEnd = sourceWordLimits.length == 0 ? 0 :
9376                    extractRangeEndFromLong(sourceWordLimits[sourceWordLimits.length - 1]);
9377                String sourceSpaces = sourceText.substring(lastSourceWordEnd, sourceText.length());
9378
9379                int lastCommonTextWordEnd = previousCommonWordIndex < 0 ? 0 :
9380                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9381                String textSpaces = text.substring(lastCommonTextWordEnd, textView.length());
9382
9383                if (!sourceSpaces.equals(textSpaces) && textSpaces.length() > 0) {
9384                    ssb.setSpan(highlightSpan(nbHighlightSpans++),
9385                            shift + lastCommonTextWordEnd, shift + textView.length(),
9386                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9387                }
9388            }
9389
9390            // Final part, text after the current suggestion range.
9391            ssb.append(mText.subSequence(spanEnd, unionEnd).toString());
9392            textView.setText(ssb);
9393        }
9394
9395        @Override
9396        public void onClick(View view) {
9397            if (view instanceof TextView) {
9398                TextView textView = (TextView) view;
9399                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9400                final int spanStart = suggestionInfo.spanStart;
9401                final int spanEnd = suggestionInfo.spanEnd;
9402                if (spanStart != NO_SUGGESTIONS) {
9403                    // SuggestionSpans are removed by replace: save them before
9404                    Editable editable = ((Editable) mText);
9405                    SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9406                            SuggestionSpan.class);
9407                    final int length = suggestionSpans.length;
9408                    int[] suggestionSpansStarts = new int[length];
9409                    int[] suggestionSpansEnds = new int[length];
9410                    int[] suggestionSpansFlags = new int[length];
9411                    for (int i = 0; i < length; i++) {
9412                        final SuggestionSpan suggestionSpan = suggestionSpans[i];
9413                        suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9414                        suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9415                        suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9416                    }
9417
9418                    final int suggestionStart = suggestionInfo.suggestionStart;
9419                    final int suggestionEnd = suggestionInfo.suggestionEnd;
9420                    final String suggestion = textView.getText().subSequence(
9421                            suggestionStart, suggestionEnd).toString();
9422                    final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9423                    ((Editable) mText).replace(spanStart, spanEnd, suggestion);
9424
9425                    // Notify source IME of the suggestion pick. Do this before swaping texts.
9426                    if (!TextUtils.isEmpty(
9427                            suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9428                        InputMethodManager imm = InputMethodManager.peekInstance();
9429                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9430                                suggestionInfo.suggestionIndex);
9431                    }
9432
9433                    // Swap text content between actual text and Suggestion span
9434                    String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9435                    suggestions[suggestionInfo.suggestionIndex] = originalText;
9436
9437                    // Restore previous SuggestionSpans
9438                    final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9439                    for (int i = 0; i < length; i++) {
9440                        // Only spans that include the modified region make sense after replacement
9441                        // Spans partially included in the replaced region are removed, there is no
9442                        // way to assign them a valid range after replacement
9443                        if (suggestionSpansStarts[i] <= spanStart &&
9444                                suggestionSpansEnds[i] >= spanEnd) {
9445                            editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9446                                    suggestionSpansEnds[i] + lengthDifference,
9447                                    suggestionSpansFlags[i]);
9448                        }
9449                    }
9450                }
9451            }
9452            hide();
9453        }
9454    }
9455
9456    void showSuggestions() {
9457        if (!isSuggestionsEnabled() || !isTextEditable()) return;
9458
9459        if (mSuggestionsPopupWindow == null) {
9460            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9461        }
9462        hideControllers();
9463        mSuggestionsPopupWindow.show();
9464    }
9465
9466    void hideSuggestions() {
9467        if (mSuggestionsPopupWindow != null) {
9468            mSuggestionsPopupWindow.hide();
9469        }
9470    }
9471
9472    boolean areSuggestionsShown() {
9473        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
9474    }
9475
9476    /**
9477     * Some parts of the text can have alternate suggestion text attached. This is typically done by
9478     * the IME by adding {@link SuggestionSpan}s to the text.
9479     *
9480     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9481     * user double taps on these parts of the text. No suggestions are displayed when this value is
9482     * false. Use {@link #setSuggestionsEnabled(boolean)} to change this value.
9483     *
9484     * Note that suggestions are only enabled for a subset of input types. In addition to setting
9485     * this flag to <code>true</code> using {@link #setSuggestionsEnabled(boolean)} or the
9486     * <code>android:suggestionsEnabled</code> xml attribute, this method will return
9487     * <code>true</code> only if the class of your input type is {@link InputType#TYPE_CLASS_TEXT}.
9488     * In addition, the type variation must also be one of
9489     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
9490     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
9491     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
9492     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
9493     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
9494     *
9495     * @return true if the suggestions popup window is enabled.
9496     *
9497     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9498     */
9499    public boolean isSuggestionsEnabled() {
9500        if (!mSuggestionsEnabled) return false;
9501        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
9502        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
9503        if (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
9504                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
9505                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
9506                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
9507                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT) return true;
9508
9509        return false;
9510    }
9511
9512    /**
9513     * Enables or disables the suggestion popup. See {@link #isSuggestionsEnabled()}.
9514     *
9515     * @param enabled Whether or not suggestions are enabled.
9516     *
9517     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9518     */
9519    public void setSuggestionsEnabled(boolean enabled) {
9520        mSuggestionsEnabled = enabled;
9521    }
9522
9523    /**
9524     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9525     * selection is initiated in this View.
9526     *
9527     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
9528     * Paste actions, depending on what this View supports.
9529     *
9530     * A custom implementation can add new entries in the default menu in its
9531     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
9532     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
9533     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
9534     * or {@link android.R.id#paste} ids as parameters.
9535     *
9536     * Returning false from
9537     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
9538     * the action mode from being started.
9539     *
9540     * Action click events should be handled by the custom implementation of
9541     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
9542     *
9543     * Note that text selection mode is not started when a TextView receives focus and the
9544     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9545     * that case, to allow for quick replacement.
9546     */
9547    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9548        mCustomSelectionActionModeCallback = actionModeCallback;
9549    }
9550
9551    /**
9552     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9553     *
9554     * @return The current custom selection callback.
9555     */
9556    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9557        return mCustomSelectionActionModeCallback;
9558    }
9559
9560    /**
9561     *
9562     * @return true if the selection mode was actually started.
9563     */
9564    private boolean startSelectionActionMode() {
9565        if (mSelectionActionMode != null) {
9566            // Selection action mode is already started
9567            return false;
9568        }
9569
9570        if (!canSelectText() || !requestFocus()) {
9571            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
9572            return false;
9573        }
9574
9575        if (!hasSelection()) {
9576            // There may already be a selection on device rotation
9577            boolean currentWordSelected = selectCurrentWord();
9578            if (!currentWordSelected) {
9579                // No word found under cursor or text selection not permitted.
9580                return false;
9581            }
9582        }
9583
9584        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
9585        mSelectionActionMode = startActionMode(actionModeCallback);
9586        final boolean selectionStarted = mSelectionActionMode != null;
9587
9588        if (selectionStarted && !mTextIsSelectable) {
9589            // Show the IME to be able to replace text, except when selecting non editable text.
9590            final InputMethodManager imm = InputMethodManager.peekInstance();
9591            if (imm != null) imm.showSoftInput(this, 0, null);
9592        }
9593
9594        return selectionStarted;
9595    }
9596
9597    private void stopSelectionActionMode() {
9598        if (mSelectionActionMode != null) {
9599            // This will hide the mSelectionModifierCursorController
9600            mSelectionActionMode.finish();
9601        }
9602    }
9603
9604    /**
9605     * Paste clipboard content between min and max positions.
9606     */
9607    private void paste(int min, int max) {
9608        ClipboardManager clipboard =
9609            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9610        ClipData clip = clipboard.getPrimaryClip();
9611        if (clip != null) {
9612            boolean didFirst = false;
9613            for (int i=0; i<clip.getItemCount(); i++) {
9614                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
9615                if (paste != null) {
9616                    if (!didFirst) {
9617                        long minMax = prepareSpacesAroundPaste(min, max, paste);
9618                        min = extractRangeStartFromLong(minMax);
9619                        max = extractRangeEndFromLong(minMax);
9620                        Selection.setSelection((Spannable) mText, max);
9621                        ((Editable) mText).replace(min, max, paste);
9622                        didFirst = true;
9623                    } else {
9624                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9625                        ((Editable) mText).insert(getSelectionEnd(), paste);
9626                    }
9627                }
9628            }
9629            stopSelectionActionMode();
9630            sLastCutOrCopyTime = 0;
9631        }
9632    }
9633
9634    private void setPrimaryClip(ClipData clip) {
9635        ClipboardManager clipboard = (ClipboardManager) getContext().
9636                getSystemService(Context.CLIPBOARD_SERVICE);
9637        clipboard.setPrimaryClip(clip);
9638        sLastCutOrCopyTime = SystemClock.uptimeMillis();
9639    }
9640
9641    /**
9642     * An ActionMode Callback class that is used to provide actions while in text selection mode.
9643     *
9644     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
9645     * on which of these this TextView supports.
9646     */
9647    private class SelectionActionModeCallback implements ActionMode.Callback {
9648
9649        @Override
9650        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
9651            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
9652
9653            boolean allowText = getContext().getResources().getBoolean(
9654                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
9655
9656            mode.setTitle(allowText ?
9657                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
9658            mode.setSubtitle(null);
9659
9660            int selectAllIconId = 0; // No icon by default
9661            if (!allowText) {
9662                // Provide an icon, text will not be displayed on smaller screens.
9663                selectAllIconId = styledAttributes.getResourceId(
9664                        R.styleable.Theme_actionModeSelectAllDrawable, 0);
9665            }
9666
9667            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
9668                    setIcon(selectAllIconId).
9669                    setAlphabeticShortcut('a').
9670                    setShowAsAction(
9671                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9672
9673            if (canCut()) {
9674                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
9675                    setIcon(styledAttributes.getResourceId(
9676                            R.styleable.Theme_actionModeCutDrawable, 0)).
9677                    setAlphabeticShortcut('x').
9678                    setShowAsAction(
9679                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9680            }
9681
9682            if (canCopy()) {
9683                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
9684                    setIcon(styledAttributes.getResourceId(
9685                            R.styleable.Theme_actionModeCopyDrawable, 0)).
9686                    setAlphabeticShortcut('c').
9687                    setShowAsAction(
9688                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9689            }
9690
9691            if (canPaste()) {
9692                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
9693                        setIcon(styledAttributes.getResourceId(
9694                                R.styleable.Theme_actionModePasteDrawable, 0)).
9695                        setAlphabeticShortcut('v').
9696                        setShowAsAction(
9697                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9698            }
9699
9700            styledAttributes.recycle();
9701
9702            if (mCustomSelectionActionModeCallback != null) {
9703                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
9704                    // The custom mode can choose to cancel the action mode
9705                    return false;
9706                }
9707            }
9708
9709            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
9710                getSelectionController().show();
9711                return true;
9712            } else {
9713                return false;
9714            }
9715        }
9716
9717        @Override
9718        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
9719            if (mCustomSelectionActionModeCallback != null) {
9720                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
9721            }
9722            return true;
9723        }
9724
9725        @Override
9726        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
9727            if (mCustomSelectionActionModeCallback != null &&
9728                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
9729                return true;
9730            }
9731            return onTextContextMenuItem(item.getItemId());
9732        }
9733
9734        @Override
9735        public void onDestroyActionMode(ActionMode mode) {
9736            if (mCustomSelectionActionModeCallback != null) {
9737                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
9738            }
9739            Selection.setSelection((Spannable) mText, getSelectionEnd());
9740
9741            if (mSelectionModifierCursorController != null) {
9742                mSelectionModifierCursorController.hide();
9743            }
9744
9745            mSelectionActionMode = null;
9746        }
9747    }
9748
9749    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
9750        private static final int POPUP_TEXT_LAYOUT =
9751                com.android.internal.R.layout.text_edit_action_popup_text;
9752        private TextView mPasteTextView;
9753        private TextView mReplaceTextView;
9754
9755        @Override
9756        protected void createPopupWindow() {
9757            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9758                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9759            mPopupWindow.setClippingEnabled(true);
9760        }
9761
9762        @Override
9763        protected void initContentView() {
9764            mContentView.setOrientation(LinearLayout.HORIZONTAL);
9765            mContentView.setBackgroundResource(
9766                    com.android.internal.R.drawable.text_edit_side_paste_window);
9767
9768            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9769                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9770
9771            LayoutParams wrapContent = new LayoutParams(
9772                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
9773
9774            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9775            mPasteTextView.setLayoutParams(wrapContent);
9776            mContentView.addView(mPasteTextView);
9777            mPasteTextView.setText(com.android.internal.R.string.paste);
9778            mPasteTextView.setOnClickListener(this);
9779
9780            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9781            mReplaceTextView.setLayoutParams(wrapContent);
9782            mContentView.addView(mReplaceTextView);
9783            mReplaceTextView.setText(com.android.internal.R.string.replace);
9784            mReplaceTextView.setOnClickListener(this);
9785        }
9786
9787        @Override
9788        public void show() {
9789            boolean canPaste = canPaste();
9790            boolean suggestionsEnabled = isSuggestionsEnabled();
9791            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
9792            mReplaceTextView.setVisibility(suggestionsEnabled ? View.VISIBLE : View.GONE);
9793
9794            if (!canPaste && !suggestionsEnabled) return;
9795
9796            super.show();
9797        }
9798
9799        @Override
9800        public void onClick(View view) {
9801            if (view == mPasteTextView && canPaste()) {
9802                onTextContextMenuItem(ID_PASTE);
9803                hide();
9804            } else if (view == mReplaceTextView) {
9805                showSuggestions();
9806            }
9807        }
9808
9809        @Override
9810        protected int getTextOffset() {
9811            return (getSelectionStart() + getSelectionEnd()) / 2;
9812        }
9813
9814        @Override
9815        protected int getVerticalLocalPosition(int line) {
9816            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
9817        }
9818
9819        @Override
9820        protected int clipVertically(int positionY) {
9821            if (positionY < 0) {
9822                final int offset = getTextOffset();
9823                final int line = mLayout.getLineForOffset(offset);
9824                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
9825                positionY += mContentView.getMeasuredHeight();
9826
9827                // Assumes insertion and selection handles share the same height
9828                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
9829                positionY += handle.getIntrinsicHeight();
9830            }
9831
9832            return positionY;
9833        }
9834    }
9835
9836    private abstract class HandleView extends View implements TextViewPositionListener {
9837        protected Drawable mDrawable;
9838        private final PopupWindow mContainer;
9839        // Position with respect to the parent TextView
9840        private int mPositionX, mPositionY;
9841        private boolean mIsDragging;
9842        // Offset from touch position to mPosition
9843        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
9844        protected int mHotspotX;
9845        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
9846        private float mTouchOffsetY;
9847        // Where the touch position should be on the handle to ensure a maximum cursor visibility
9848        private float mIdealVerticalOffset;
9849        // Parent's (TextView) previous position in window
9850        private int mLastParentX, mLastParentY;
9851        // Transient action popup window for Paste and Replace actions
9852        protected ActionPopupWindow mActionPopupWindow;
9853        // Previous text character offset
9854        private int mPreviousOffset = -1;
9855        // Previous text character offset
9856        private boolean mPositionHasChanged = true;
9857        // Used to delay the appearance of the action popup window
9858        private Runnable mActionPopupShower;
9859
9860        public HandleView() {
9861            super(TextView.this.mContext);
9862            mContainer = new PopupWindow(TextView.this.mContext, null,
9863                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9864            mContainer.setSplitTouchEnabled(true);
9865            mContainer.setClippingEnabled(false);
9866            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9867            mContainer.setContentView(this);
9868
9869            initDrawable();
9870
9871            final int handleHeight = mDrawable.getIntrinsicHeight();
9872            mTouchOffsetY = -0.3f * handleHeight;
9873            mIdealVerticalOffset = 0.7f * handleHeight;
9874        }
9875
9876        protected abstract void initDrawable();
9877
9878        // Touch-up filter: number of previous positions remembered
9879        private static final int HISTORY_SIZE = 5;
9880        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
9881        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
9882        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
9883        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
9884        private int mPreviousOffsetIndex = 0;
9885        private int mNumberPreviousOffsets = 0;
9886
9887        private void startTouchUpFilter(int offset) {
9888            mNumberPreviousOffsets = 0;
9889            addPositionToTouchUpFilter(offset);
9890        }
9891
9892        private void addPositionToTouchUpFilter(int offset) {
9893            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
9894            mPreviousOffsets[mPreviousOffsetIndex] = offset;
9895            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
9896            mNumberPreviousOffsets++;
9897        }
9898
9899        private void filterOnTouchUp() {
9900            final long now = SystemClock.uptimeMillis();
9901            int i = 0;
9902            int index = mPreviousOffsetIndex;
9903            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
9904            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
9905                i++;
9906                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
9907            }
9908
9909            if (i > 0 && i < iMax &&
9910                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
9911                positionAtCursorOffset(mPreviousOffsets[index]);
9912            }
9913        }
9914
9915        public boolean offsetHasBeenChanged() {
9916            return mNumberPreviousOffsets > 1;
9917        }
9918
9919        @Override
9920        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
9921            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
9922        }
9923
9924        public void show() {
9925            if (isShowing()) return;
9926
9927            getPositionListener().addSubscriber(this, true);
9928
9929            // Make sure the offset is always considered new, even when focusing at same position
9930            mPreviousOffset = -1;
9931            positionAtCursorOffset(getCurrentCursorOffset());
9932
9933            hideActionPopupWindow();
9934        }
9935
9936        protected void dismiss() {
9937            mIsDragging = false;
9938            mContainer.dismiss();
9939            onDetached();
9940        }
9941
9942        public void hide() {
9943            dismiss();
9944
9945            TextView.this.getPositionListener().removeSubscriber(this);
9946        }
9947
9948        void showActionPopupWindow(int delay) {
9949            if (mActionPopupWindow == null) {
9950                mActionPopupWindow = new ActionPopupWindow();
9951            }
9952            if (mActionPopupShower == null) {
9953                mActionPopupShower = new Runnable() {
9954                    public void run() {
9955                        mActionPopupWindow.show();
9956                    }
9957                };
9958            } else {
9959                TextView.this.removeCallbacks(mActionPopupShower);
9960            }
9961            TextView.this.postDelayed(mActionPopupShower, delay);
9962        }
9963
9964        protected void hideActionPopupWindow() {
9965            if (mActionPopupShower != null) {
9966                TextView.this.removeCallbacks(mActionPopupShower);
9967            }
9968            if (mActionPopupWindow != null) {
9969                mActionPopupWindow.hide();
9970            }
9971        }
9972
9973        public boolean isShowing() {
9974            return mContainer.isShowing();
9975        }
9976
9977        private boolean isVisible() {
9978            // Always show a dragging handle.
9979            if (mIsDragging) {
9980                return true;
9981            }
9982
9983            if (isInBatchEditMode()) {
9984                return false;
9985            }
9986
9987            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
9988        }
9989
9990        public abstract int getCurrentCursorOffset();
9991
9992        public abstract void updateSelection(int offset);
9993
9994        public abstract void updatePosition(float x, float y);
9995
9996        protected void positionAtCursorOffset(int offset) {
9997            // A HandleView relies on the layout, which may be nulled by external methods
9998            if (mLayout == null) {
9999                // Will update controllers' state, hiding them and stopping selection mode if needed
10000                prepareCursorControllers();
10001                return;
10002            }
10003
10004            if (offset != mPreviousOffset) {
10005                updateSelection(offset);
10006                addPositionToTouchUpFilter(offset);
10007                final int line = mLayout.getLineForOffset(offset);
10008
10009                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10010                mPositionY = mLayout.getLineBottom(line);
10011
10012                // Take TextView's padding into account.
10013                mPositionX += viewportToContentHorizontalOffset();
10014                mPositionY += viewportToContentVerticalOffset();
10015
10016                mPreviousOffset = offset;
10017                mPositionHasChanged = true;
10018            }
10019        }
10020
10021        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
10022            positionAtCursorOffset(getCurrentCursorOffset());
10023            if (modified || mPositionHasChanged) {
10024                if (mIsDragging) {
10025                    // Update touchToWindow offset in case of parent scrolling while dragging
10026                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10027                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10028                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10029                        mLastParentX = parentPositionX;
10030                        mLastParentY = parentPositionY;
10031                    }
10032
10033                    onHandleMoved();
10034                }
10035
10036                if (isVisible()) {
10037                    final int positionX = parentPositionX + mPositionX;
10038                    final int positionY = parentPositionY + mPositionY;
10039                    if (isShowing()) {
10040                        mContainer.update(positionX, positionY, -1, -1);
10041                    } else {
10042                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10043                                positionX, positionY);
10044                    }
10045                } else {
10046                    if (isShowing()) {
10047                        dismiss();
10048                    }
10049                }
10050
10051                mPositionHasChanged = false;
10052            }
10053        }
10054
10055        @Override
10056        protected void onDraw(Canvas c) {
10057            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10058            mDrawable.draw(c);
10059        }
10060
10061        @Override
10062        public boolean onTouchEvent(MotionEvent ev) {
10063            switch (ev.getActionMasked()) {
10064                case MotionEvent.ACTION_DOWN: {
10065                    startTouchUpFilter(getCurrentCursorOffset());
10066                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10067                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10068
10069                    final PositionListener positionListener = getPositionListener();
10070                    mLastParentX = positionListener.getPositionX();
10071                    mLastParentY = positionListener.getPositionY();
10072                    mIsDragging = true;
10073                    break;
10074                }
10075
10076                case MotionEvent.ACTION_MOVE: {
10077                    final float rawX = ev.getRawX();
10078                    final float rawY = ev.getRawY();
10079
10080                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10081                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10082                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10083                    float newVerticalOffset;
10084                    if (previousVerticalOffset < mIdealVerticalOffset) {
10085                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10086                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10087                    } else {
10088                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10089                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10090                    }
10091                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10092
10093                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10094                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10095
10096                    updatePosition(newPosX, newPosY);
10097                    break;
10098                }
10099
10100                case MotionEvent.ACTION_UP:
10101                    filterOnTouchUp();
10102                    mIsDragging = false;
10103                    break;
10104
10105                case MotionEvent.ACTION_CANCEL:
10106                    mIsDragging = false;
10107                    break;
10108            }
10109            return true;
10110        }
10111
10112        public boolean isDragging() {
10113            return mIsDragging;
10114        }
10115
10116        void onHandleMoved() {
10117            hideActionPopupWindow();
10118        }
10119
10120        public void onDetached() {
10121            hideActionPopupWindow();
10122        }
10123    }
10124
10125    private class InsertionHandleView extends HandleView {
10126        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10127        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10128
10129        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10130        private float mDownPositionX, mDownPositionY;
10131        private Runnable mHider;
10132
10133        @Override
10134        public void show() {
10135            super.show();
10136            hideAfterDelay();
10137        }
10138
10139        public void show(int delayBeforeShowActionPopup) {
10140            show();
10141
10142            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10143            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10144                delayBeforeShowActionPopup = 0;
10145            }
10146            showActionPopupWindow(delayBeforeShowActionPopup);
10147        }
10148
10149        private void hideAfterDelay() {
10150            removeHiderCallback();
10151            if (mHider == null) {
10152                mHider = new Runnable() {
10153                    public void run() {
10154                        hide();
10155                    }
10156                };
10157            }
10158            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10159        }
10160
10161        private void removeHiderCallback() {
10162            if (mHider != null) {
10163                TextView.this.removeCallbacks(mHider);
10164            }
10165        }
10166
10167        @Override
10168        protected void initDrawable() {
10169            if (mSelectHandleCenter == null) {
10170                mSelectHandleCenter = mContext.getResources().getDrawable(
10171                        mTextSelectHandleRes);
10172            }
10173            mDrawable = mSelectHandleCenter;
10174            mHotspotX = mDrawable.getIntrinsicWidth() / 2;
10175        }
10176
10177        @Override
10178        public boolean onTouchEvent(MotionEvent ev) {
10179            final boolean result = super.onTouchEvent(ev);
10180
10181            switch (ev.getActionMasked()) {
10182                case MotionEvent.ACTION_DOWN:
10183                    mDownPositionX = ev.getRawX();
10184                    mDownPositionY = ev.getRawY();
10185                    break;
10186
10187                case MotionEvent.ACTION_UP:
10188                    if (!offsetHasBeenChanged()) {
10189                        final float deltaX = mDownPositionX - ev.getRawX();
10190                        final float deltaY = mDownPositionY - ev.getRawY();
10191                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10192                        if (distanceSquared < mSquaredTouchSlopDistance) {
10193                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10194                                // Tapping on the handle dismisses the displayed action popup
10195                                mActionPopupWindow.hide();
10196                            } else {
10197                                show(0);
10198                            }
10199                        }
10200                    }
10201                    hideAfterDelay();
10202                    break;
10203
10204                case MotionEvent.ACTION_CANCEL:
10205                    hideAfterDelay();
10206                    break;
10207
10208                default:
10209                    break;
10210            }
10211
10212            return result;
10213        }
10214
10215        @Override
10216        public int getCurrentCursorOffset() {
10217            return TextView.this.getSelectionStart();
10218        }
10219
10220        @Override
10221        public void updateSelection(int offset) {
10222            Selection.setSelection((Spannable) mText, offset);
10223        }
10224
10225        @Override
10226        public void updatePosition(float x, float y) {
10227            positionAtCursorOffset(getOffsetForPosition(x, y));
10228        }
10229
10230        @Override
10231        void onHandleMoved() {
10232            super.onHandleMoved();
10233            removeHiderCallback();
10234        }
10235
10236        @Override
10237        public void onDetached() {
10238            super.onDetached();
10239            removeHiderCallback();
10240        }
10241    }
10242
10243    private class SelectionStartHandleView extends HandleView {
10244        @Override
10245        protected void initDrawable() {
10246            if (mSelectHandleLeft == null) {
10247                mSelectHandleLeft = mContext.getResources().getDrawable(
10248                        mTextSelectHandleLeftRes);
10249            }
10250            mDrawable = mSelectHandleLeft;
10251            mHotspotX = (mDrawable.getIntrinsicWidth() * 3) / 4;
10252        }
10253
10254        @Override
10255        public int getCurrentCursorOffset() {
10256            return TextView.this.getSelectionStart();
10257        }
10258
10259        @Override
10260        public void updateSelection(int offset) {
10261            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10262        }
10263
10264        @Override
10265        public void updatePosition(float x, float y) {
10266            final int selectionStart = getSelectionStart();
10267            final int selectionEnd = getSelectionEnd();
10268
10269            int offset = getOffsetForPosition(x, y);
10270
10271            // No need to redraw when the offset is unchanged
10272            if (offset == selectionStart) return;
10273            // Handles can not cross and selection is at least one character
10274            if (offset >= selectionEnd) offset = selectionEnd - 1;
10275
10276            positionAtCursorOffset(offset);
10277        }
10278
10279        public ActionPopupWindow getActionPopupWindow() {
10280            return mActionPopupWindow;
10281        }
10282    }
10283
10284    private class SelectionEndHandleView extends HandleView {
10285        @Override
10286        protected void initDrawable() {
10287            if (mSelectHandleRight == null) {
10288                mSelectHandleRight = mContext.getResources().getDrawable(
10289                        mTextSelectHandleRightRes);
10290            }
10291            mDrawable = mSelectHandleRight;
10292            mHotspotX = mDrawable.getIntrinsicWidth() / 4;
10293        }
10294
10295        @Override
10296        public int getCurrentCursorOffset() {
10297            return TextView.this.getSelectionEnd();
10298        }
10299
10300        @Override
10301        public void updateSelection(int offset) {
10302            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10303        }
10304
10305        @Override
10306        public void updatePosition(float x, float y) {
10307            final int selectionStart = getSelectionStart();
10308            final int selectionEnd = getSelectionEnd();
10309
10310            int offset = getOffsetForPosition(x, y);
10311
10312            // No need to redraw when the offset is unchanged
10313            if (offset == selectionEnd) return;
10314            // Handles can not cross and selection is at least one character
10315            if (offset <= selectionStart) offset = selectionStart + 1;
10316
10317            positionAtCursorOffset(offset);
10318        }
10319
10320        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10321            mActionPopupWindow = actionPopupWindow;
10322        }
10323    }
10324
10325    /**
10326     * A CursorController instance can be used to control a cursor in the text.
10327     * It is not used outside of {@link TextView}.
10328     * @hide
10329     */
10330    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10331        /**
10332         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10333         * See also {@link #hide()}.
10334         */
10335        public void show();
10336
10337        /**
10338         * Hide the cursor controller from screen.
10339         * See also {@link #show()}.
10340         */
10341        public void hide();
10342
10343        /**
10344         * Called when the view is detached from window. Perform house keeping task, such as
10345         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10346         * preventing the activity from being recycled.
10347         */
10348        public void onDetached();
10349    }
10350
10351    private class InsertionPointCursorController implements CursorController {
10352        private static final int DELAY_BEFORE_PASTE_ACTION = 1600;
10353
10354        private InsertionHandleView mHandle;
10355
10356        public void show() {
10357            getHandle().show(DELAY_BEFORE_PASTE_ACTION);
10358        }
10359
10360        public void showImmediately() {
10361            getHandle().show(0);
10362        }
10363
10364        public void hide() {
10365            if (mHandle != null) {
10366                mHandle.hide();
10367            }
10368        }
10369
10370        public void onTouchModeChanged(boolean isInTouchMode) {
10371            if (!isInTouchMode) {
10372                hide();
10373            }
10374        }
10375
10376        private InsertionHandleView getHandle() {
10377            if (mHandle == null) {
10378                mHandle = new InsertionHandleView();
10379            }
10380            return mHandle;
10381        }
10382
10383        @Override
10384        public void onDetached() {
10385            final ViewTreeObserver observer = getViewTreeObserver();
10386            observer.removeOnTouchModeChangeListener(this);
10387
10388            if (mHandle != null) mHandle.onDetached();
10389        }
10390    }
10391
10392    private class SelectionModifierCursorController implements CursorController {
10393        private static final int DELAY_BEFORE_REPLACE_ACTION = 1200;
10394        // The cursor controller handles, lazily created when shown.
10395        private SelectionStartHandleView mStartHandle;
10396        private SelectionEndHandleView mEndHandle;
10397        // The offsets of that last touch down event. Remembered to start selection there.
10398        private int mMinTouchOffset, mMaxTouchOffset;
10399
10400        // Double tap detection
10401        private long mPreviousTapUpTime = 0;
10402        private float mPreviousTapPositionX, mPreviousTapPositionY;
10403
10404        SelectionModifierCursorController() {
10405            resetTouchOffsets();
10406        }
10407
10408        public void show() {
10409            if (isInBatchEditMode()) {
10410                return;
10411            }
10412
10413            // Lazy object creation has to be done before updatePosition() is called.
10414            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
10415            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
10416
10417            mStartHandle.show();
10418            mEndHandle.show();
10419
10420            // Make sure both left and right handles share the same ActionPopupWindow (so that
10421            // moving any of the handles hides the action popup).
10422            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
10423            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
10424
10425            hideInsertionPointCursorController();
10426            hideSuggestions();
10427        }
10428
10429        public void hide() {
10430            if (mStartHandle != null) mStartHandle.hide();
10431            if (mEndHandle != null) mEndHandle.hide();
10432        }
10433
10434        public void onTouchEvent(MotionEvent event) {
10435            // This is done even when the View does not have focus, so that long presses can start
10436            // selection and tap can move cursor from this tap position.
10437            switch (event.getActionMasked()) {
10438                case MotionEvent.ACTION_DOWN:
10439                    final float x = event.getX();
10440                    final float y = event.getY();
10441
10442                    // Remember finger down position, to be able to start selection from there
10443                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
10444
10445                    // Double tap detection
10446                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
10447                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
10448                            isPositionOnText(x, y)) {
10449                        final float deltaX = x - mPreviousTapPositionX;
10450                        final float deltaY = y - mPreviousTapPositionY;
10451                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10452                        if (distanceSquared < mSquaredTouchSlopDistance) {
10453                            startSelectionActionMode();
10454                            mDiscardNextActionUp = true;
10455                        }
10456                    }
10457
10458                    mPreviousTapPositionX = x;
10459                    mPreviousTapPositionY = y;
10460                    break;
10461
10462                case MotionEvent.ACTION_POINTER_DOWN:
10463                case MotionEvent.ACTION_POINTER_UP:
10464                    // Handle multi-point gestures. Keep min and max offset positions.
10465                    // Only activated for devices that correctly handle multi-touch.
10466                    if (mContext.getPackageManager().hasSystemFeature(
10467                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
10468                        updateMinAndMaxOffsets(event);
10469                    }
10470                    break;
10471
10472                case MotionEvent.ACTION_UP:
10473                    mPreviousTapUpTime = SystemClock.uptimeMillis();
10474                    break;
10475            }
10476        }
10477
10478        /**
10479         * @param event
10480         */
10481        private void updateMinAndMaxOffsets(MotionEvent event) {
10482            int pointerCount = event.getPointerCount();
10483            for (int index = 0; index < pointerCount; index++) {
10484                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
10485                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
10486                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
10487            }
10488        }
10489
10490        public int getMinTouchOffset() {
10491            return mMinTouchOffset;
10492        }
10493
10494        public int getMaxTouchOffset() {
10495            return mMaxTouchOffset;
10496        }
10497
10498        public void resetTouchOffsets() {
10499            mMinTouchOffset = mMaxTouchOffset = -1;
10500        }
10501
10502        /**
10503         * @return true iff this controller is currently used to move the selection start.
10504         */
10505        public boolean isSelectionStartDragged() {
10506            return mStartHandle != null && mStartHandle.isDragging();
10507        }
10508
10509        public void onTouchModeChanged(boolean isInTouchMode) {
10510            if (!isInTouchMode) {
10511                hide();
10512            }
10513        }
10514
10515        @Override
10516        public void onDetached() {
10517            final ViewTreeObserver observer = getViewTreeObserver();
10518            observer.removeOnTouchModeChangeListener(this);
10519
10520            if (mStartHandle != null) mStartHandle.onDetached();
10521            if (mEndHandle != null) mEndHandle.onDetached();
10522        }
10523    }
10524
10525    private void hideInsertionPointCursorController() {
10526        // No need to create the controller to hide it.
10527        if (mInsertionPointCursorController != null) {
10528            mInsertionPointCursorController.hide();
10529        }
10530    }
10531
10532    /**
10533     * Hides the insertion controller and stops text selection mode, hiding the selection controller
10534     */
10535    private void hideControllers() {
10536        hideInsertionPointCursorController();
10537        stopSelectionActionMode();
10538        hideSuggestions();
10539    }
10540
10541    /**
10542     * Get the character offset closest to the specified absolute position. A typical use case is to
10543     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
10544     *
10545     * @param x The horizontal absolute position of a point on screen
10546     * @param y The vertical absolute position of a point on screen
10547     * @return the character offset for the character whose position is closest to the specified
10548     *  position. Returns -1 if there is no layout.
10549     */
10550    public int getOffsetForPosition(float x, float y) {
10551        if (getLayout() == null) return -1;
10552        final int line = getLineAtCoordinate(y);
10553        final int offset = getOffsetAtCoordinate(line, x);
10554        return offset;
10555    }
10556
10557    private float convertToLocalHorizontalCoordinate(float x) {
10558        x -= getTotalPaddingLeft();
10559        // Clamp the position to inside of the view.
10560        x = Math.max(0.0f, x);
10561        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
10562        x += getScrollX();
10563        return x;
10564    }
10565
10566    private int getLineAtCoordinate(float y) {
10567        y -= getTotalPaddingTop();
10568        // Clamp the position to inside of the view.
10569        y = Math.max(0.0f, y);
10570        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
10571        y += getScrollY();
10572        return getLayout().getLineForVertical((int) y);
10573    }
10574
10575    private int getOffsetAtCoordinate(int line, float x) {
10576        x = convertToLocalHorizontalCoordinate(x);
10577        return getLayout().getOffsetForHorizontal(line, x);
10578    }
10579
10580    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
10581     * in the view. Returns false when the position is in the empty space of left/right of text.
10582     */
10583    private boolean isPositionOnText(float x, float y) {
10584        if (getLayout() == null) return false;
10585
10586        final int line = getLineAtCoordinate(y);
10587        x = convertToLocalHorizontalCoordinate(x);
10588
10589        if (x < getLayout().getLineLeft(line)) return false;
10590        if (x > getLayout().getLineRight(line)) return false;
10591        return true;
10592    }
10593
10594    @Override
10595    public boolean onDragEvent(DragEvent event) {
10596        switch (event.getAction()) {
10597            case DragEvent.ACTION_DRAG_STARTED:
10598                return hasInsertionController();
10599
10600            case DragEvent.ACTION_DRAG_ENTERED:
10601                TextView.this.requestFocus();
10602                return true;
10603
10604            case DragEvent.ACTION_DRAG_LOCATION:
10605                final int offset = getOffsetForPosition(event.getX(), event.getY());
10606                Selection.setSelection((Spannable)mText, offset);
10607                return true;
10608
10609            case DragEvent.ACTION_DROP:
10610                onDrop(event);
10611                return true;
10612
10613            case DragEvent.ACTION_DRAG_ENDED:
10614            case DragEvent.ACTION_DRAG_EXITED:
10615            default:
10616                return true;
10617        }
10618    }
10619
10620    private void onDrop(DragEvent event) {
10621        StringBuilder content = new StringBuilder("");
10622        ClipData clipData = event.getClipData();
10623        final int itemCount = clipData.getItemCount();
10624        for (int i=0; i < itemCount; i++) {
10625            Item item = clipData.getItemAt(i);
10626            content.append(item.coerceToText(TextView.this.mContext));
10627        }
10628
10629        final int offset = getOffsetForPosition(event.getX(), event.getY());
10630
10631        Object localState = event.getLocalState();
10632        DragLocalState dragLocalState = null;
10633        if (localState instanceof DragLocalState) {
10634            dragLocalState = (DragLocalState) localState;
10635        }
10636        boolean dragDropIntoItself = dragLocalState != null &&
10637                dragLocalState.sourceTextView == this;
10638
10639        if (dragDropIntoItself) {
10640            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
10641                // A drop inside the original selection discards the drop.
10642                return;
10643            }
10644        }
10645
10646        final int originalLength = mText.length();
10647        long minMax = prepareSpacesAroundPaste(offset, offset, content);
10648        int min = extractRangeStartFromLong(minMax);
10649        int max = extractRangeEndFromLong(minMax);
10650
10651        Selection.setSelection((Spannable) mText, max);
10652        ((Editable) mText).replace(min, max, content);
10653
10654        if (dragDropIntoItself) {
10655            int dragSourceStart = dragLocalState.start;
10656            int dragSourceEnd = dragLocalState.end;
10657            if (max <= dragSourceStart) {
10658                // Inserting text before selection has shifted positions
10659                final int shift = mText.length() - originalLength;
10660                dragSourceStart += shift;
10661                dragSourceEnd += shift;
10662            }
10663
10664            // Delete original selection
10665            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
10666
10667            // Make sure we do not leave two adjacent spaces.
10668            if ((dragSourceStart == 0 ||
10669                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
10670                    (dragSourceStart == mText.length() ||
10671                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
10672                final int pos = dragSourceStart == mText.length() ?
10673                        dragSourceStart - 1 : dragSourceStart;
10674                ((Editable) mText).delete(pos, pos + 1);
10675            }
10676        }
10677    }
10678
10679    /**
10680     * @return True if this view supports insertion handles.
10681     */
10682    boolean hasInsertionController() {
10683        return mInsertionControllerEnabled;
10684    }
10685
10686    /**
10687     * @return True if this view supports selection handles.
10688     */
10689    boolean hasSelectionController() {
10690        return mSelectionControllerEnabled;
10691    }
10692
10693    InsertionPointCursorController getInsertionController() {
10694        if (!mInsertionControllerEnabled) {
10695            return null;
10696        }
10697
10698        if (mInsertionPointCursorController == null) {
10699            mInsertionPointCursorController = new InsertionPointCursorController();
10700
10701            final ViewTreeObserver observer = getViewTreeObserver();
10702            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
10703        }
10704
10705        return mInsertionPointCursorController;
10706    }
10707
10708    SelectionModifierCursorController getSelectionController() {
10709        if (!mSelectionControllerEnabled) {
10710            return null;
10711        }
10712
10713        if (mSelectionModifierCursorController == null) {
10714            mSelectionModifierCursorController = new SelectionModifierCursorController();
10715
10716            final ViewTreeObserver observer = getViewTreeObserver();
10717            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
10718        }
10719
10720        return mSelectionModifierCursorController;
10721    }
10722
10723    boolean isInBatchEditMode() {
10724        final InputMethodState ims = mInputMethodState;
10725        if (ims != null) {
10726            return ims.mBatchEditNesting > 0;
10727        }
10728        return mInBatchEditControllers;
10729    }
10730
10731    @Override
10732    protected void resolveTextDirection() {
10733        // Always need to resolve layout direction first
10734        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
10735
10736        // Then resolve text direction on the parent
10737        super.resolveTextDirection();
10738
10739        // Now, we can select the heuristic
10740        int textDir = getResolvedTextDirection();
10741        switch (textDir) {
10742            default:
10743            case TEXT_DIRECTION_FIRST_STRONG:
10744                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
10745                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
10746                break;
10747            case TEXT_DIRECTION_ANY_RTL:
10748                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
10749                break;
10750            case TEXT_DIRECTION_CHAR_COUNT:
10751                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.CHARCOUNT_RTL:
10752                        TextDirectionHeuristics.CHARCOUNT_LTR);
10753                break;
10754            case TEXT_DIRECTION_LTR:
10755                mTextDir = TextDirectionHeuristics.LTR;
10756                break;
10757            case TEXT_DIRECTION_RTL:
10758                mTextDir = TextDirectionHeuristics.RTL;
10759                break;
10760        }
10761    }
10762
10763    /**
10764     * Subclasses will need to override this method to implement their own way of resolving
10765     * drawables depending on the layout direction.
10766     *
10767     * A call to the super method will be required from the subclasses implementation.
10768     *
10769     */
10770    protected void resolveDrawables() {
10771        // No need to resolve twice
10772        if (mResolvedDrawables) {
10773            return;
10774        }
10775        // No drawable to resolve
10776        if (mDrawables == null) {
10777            return;
10778        }
10779        // No relative drawable to resolve
10780        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
10781            mResolvedDrawables = true;
10782            return;
10783        }
10784
10785        Drawables dr = mDrawables;
10786        switch(getResolvedLayoutDirection()) {
10787            case LAYOUT_DIRECTION_RTL:
10788                if (dr.mDrawableStart != null) {
10789                    dr.mDrawableRight = dr.mDrawableStart;
10790
10791                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
10792                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
10793                }
10794                if (dr.mDrawableEnd != null) {
10795                    dr.mDrawableLeft = dr.mDrawableEnd;
10796
10797                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
10798                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
10799                }
10800                break;
10801
10802            case LAYOUT_DIRECTION_LTR:
10803            default:
10804                if (dr.mDrawableStart != null) {
10805                    dr.mDrawableLeft = dr.mDrawableStart;
10806
10807                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
10808                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
10809                }
10810                if (dr.mDrawableEnd != null) {
10811                    dr.mDrawableRight = dr.mDrawableEnd;
10812
10813                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
10814                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
10815                }
10816                break;
10817        }
10818        mResolvedDrawables = true;
10819    }
10820
10821    protected void resetResolvedDrawables() {
10822        mResolvedDrawables = false;
10823    }
10824
10825    @ViewDebug.ExportedProperty(category = "text")
10826    private CharSequence            mText;
10827    private CharSequence            mTransformed;
10828    private BufferType              mBufferType = BufferType.NORMAL;
10829
10830    private int                     mInputType = EditorInfo.TYPE_NULL;
10831    private CharSequence            mHint;
10832    private Layout                  mHintLayout;
10833
10834    private KeyListener             mInput;
10835
10836    private MovementMethod          mMovement;
10837    private TransformationMethod    mTransformation;
10838    private boolean                 mAllowTransformationLengthChange;
10839    private ChangeWatcher           mChangeWatcher;
10840
10841    private ArrayList<TextWatcher>  mListeners = null;
10842
10843    // display attributes
10844    private final TextPaint         mTextPaint;
10845    private boolean                 mUserSetTextScaleX;
10846    private final Paint             mHighlightPaint;
10847    private int                     mHighlightColor = 0xCC475925;
10848    /**
10849     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
10850     * this field being protected. Will be restored as private when lineHeight
10851     * feature request 3215097 is implemented
10852     * @hide
10853     */
10854    protected Layout                mLayout;
10855
10856    private long                    mShowCursor;
10857    private Blink                   mBlink;
10858    private boolean                 mCursorVisible = true;
10859
10860    // Cursor Controllers.
10861    private InsertionPointCursorController mInsertionPointCursorController;
10862    private SelectionModifierCursorController mSelectionModifierCursorController;
10863    private ActionMode              mSelectionActionMode;
10864    private boolean                 mInsertionControllerEnabled;
10865    private boolean                 mSelectionControllerEnabled;
10866    private boolean                 mInBatchEditControllers;
10867
10868    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
10869    // select from the current cursor position. Otherwise, select from long pressed position.
10870    private boolean                 mDPadCenterIsDown = false;
10871    private boolean                 mEnterKeyIsDown = false;
10872    private boolean                 mContextMenuTriggeredByKey = false;
10873
10874    private boolean                 mSelectAllOnFocus = false;
10875
10876    private int                     mGravity = Gravity.TOP | Gravity.START;
10877    private boolean                 mHorizontallyScrolling;
10878
10879    private int                     mAutoLinkMask;
10880    private boolean                 mLinksClickable = true;
10881
10882    private float                   mSpacingMult = 1;
10883    private float                   mSpacingAdd = 0;
10884    private boolean                 mTextIsSelectable = false;
10885
10886    private static final int        LINES = 1;
10887    private static final int        EMS = LINES;
10888    private static final int        PIXELS = 2;
10889
10890    private int                     mMaximum = Integer.MAX_VALUE;
10891    private int                     mMaxMode = LINES;
10892    private int                     mMinimum = 0;
10893    private int                     mMinMode = LINES;
10894
10895    private int                     mOldMaximum = mMaximum;
10896    private int                     mOldMaxMode = mMaxMode;
10897
10898    private int                     mMaxWidth = Integer.MAX_VALUE;
10899    private int                     mMaxWidthMode = PIXELS;
10900    private int                     mMinWidth = 0;
10901    private int                     mMinWidthMode = PIXELS;
10902
10903    private boolean                 mSingleLine;
10904    private int                     mDesiredHeightAtMeasure = -1;
10905    private boolean                 mIncludePad = true;
10906
10907    // tmp primitives, so we don't alloc them on each draw
10908    private Path                    mHighlightPath;
10909    private boolean                 mHighlightPathBogus = true;
10910    private static final RectF      sTempRect = new RectF();
10911
10912    // XXX should be much larger
10913    private static final int        VERY_WIDE = 16384;
10914
10915    private static final int        BLINK = 500;
10916
10917    private static final int ANIMATED_SCROLL_GAP = 250;
10918    private long mLastScroll;
10919    private Scroller mScroller = null;
10920
10921    private BoringLayout.Metrics mBoring;
10922    private BoringLayout.Metrics mHintBoring;
10923
10924    private BoringLayout mSavedLayout, mSavedHintLayout;
10925
10926    private TextDirectionHeuristic mTextDir = null;
10927
10928    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
10929    private InputFilter[] mFilters = NO_FILTERS;
10930    private static final Spanned EMPTY_SPANNED = new SpannedString("");
10931    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
10932    // System wide time for last cut or copy action.
10933    private static long sLastCutOrCopyTime;
10934    // Used to highlight a word when it is corrected by the IME
10935    private CorrectionHighlighter mCorrectionHighlighter;
10936    // New state used to change background based on whether this TextView is multiline.
10937    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
10938}
10939