TextView.java revision 7d1c55fad8194e2c82f5f88f98ab5569f9c52ab9 
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        mHighlightPathBogus = true;
6067
6068        if (w < 0) {
6069            w = 0;
6070        }
6071        if (hintWidth < 0) {
6072            hintWidth = 0;
6073        }
6074
6075        Layout.Alignment alignment = getLayoutAlignment();
6076        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6077
6078        if (mTextDir == null) {
6079            resolveTextDirection();
6080        }
6081        if (mText instanceof Spannable) {
6082            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
6083                    alignment, mTextDir, mSpacingMult,
6084                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
6085                    ellipsisWidth);
6086        } else {
6087            if (boring == UNKNOWN_BORING) {
6088                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6089                if (boring != null) {
6090                    mBoring = boring;
6091                }
6092            }
6093
6094            if (boring != null) {
6095                if (boring.width <= w &&
6096                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
6097                    if (mSavedLayout != null) {
6098                        mLayout = mSavedLayout.
6099                                replaceOrMake(mTransformed, mTextPaint,
6100                                w, alignment, mSpacingMult, mSpacingAdd,
6101                                boring, mIncludePad);
6102                    } else {
6103                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6104                                w, alignment, mSpacingMult, mSpacingAdd,
6105                                boring, mIncludePad);
6106                    }
6107
6108                    mSavedLayout = (BoringLayout) mLayout;
6109                } else if (shouldEllipsize && boring.width <= w) {
6110                    if (mSavedLayout != null) {
6111                        mLayout = mSavedLayout.
6112                                replaceOrMake(mTransformed, mTextPaint,
6113                                w, alignment, mSpacingMult, mSpacingAdd,
6114                                boring, mIncludePad, mEllipsize,
6115                                ellipsisWidth);
6116                    } else {
6117                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6118                                w, alignment, mSpacingMult, mSpacingAdd,
6119                                boring, mIncludePad, mEllipsize,
6120                                ellipsisWidth);
6121                    }
6122                } else if (shouldEllipsize) {
6123                    mLayout = new StaticLayout(mTransformed,
6124                                0, mTransformed.length(),
6125                                mTextPaint, w, alignment, mTextDir, mSpacingMult,
6126                                mSpacingAdd, mIncludePad, mEllipsize,
6127                                ellipsisWidth);
6128                } else {
6129                    mLayout = new StaticLayout(mTransformed, mTextPaint,
6130                            w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6131                            mIncludePad);
6132                }
6133            } else if (shouldEllipsize) {
6134                mLayout = new StaticLayout(mTransformed,
6135                            0, mTransformed.length(),
6136                            mTextPaint, w, alignment, mTextDir, mSpacingMult,
6137                            mSpacingAdd, mIncludePad, mEllipsize,
6138                            ellipsisWidth);
6139            } else {
6140                mLayout = new StaticLayout(mTransformed, mTextPaint,
6141                        w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6142                        mIncludePad);
6143            }
6144        }
6145
6146        shouldEllipsize = mEllipsize != null;
6147        mHintLayout = null;
6148
6149        if (mHint != null) {
6150            if (shouldEllipsize) hintWidth = w;
6151
6152            if (hintBoring == UNKNOWN_BORING) {
6153                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6154                                                   mHintBoring);
6155                if (hintBoring != null) {
6156                    mHintBoring = hintBoring;
6157                }
6158            }
6159
6160            if (hintBoring != null) {
6161                if (hintBoring.width <= hintWidth &&
6162                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6163                    if (mSavedHintLayout != null) {
6164                        mHintLayout = mSavedHintLayout.
6165                                replaceOrMake(mHint, mTextPaint,
6166                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6167                                hintBoring, mIncludePad);
6168                    } else {
6169                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6170                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6171                                hintBoring, mIncludePad);
6172                    }
6173
6174                    mSavedHintLayout = (BoringLayout) mHintLayout;
6175                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6176                    if (mSavedHintLayout != null) {
6177                        mHintLayout = mSavedHintLayout.
6178                                replaceOrMake(mHint, mTextPaint,
6179                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6180                                hintBoring, mIncludePad, mEllipsize,
6181                                ellipsisWidth);
6182                    } else {
6183                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6184                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6185                                hintBoring, mIncludePad, mEllipsize,
6186                                ellipsisWidth);
6187                    }
6188                } else if (shouldEllipsize) {
6189                    mHintLayout = new StaticLayout(mHint,
6190                                0, mHint.length(),
6191                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6192                                mSpacingAdd, mIncludePad, mEllipsize,
6193                                ellipsisWidth);
6194                } else {
6195                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6196                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6197                            mIncludePad);
6198                }
6199            } else if (shouldEllipsize) {
6200                mHintLayout = new StaticLayout(mHint,
6201                            0, mHint.length(),
6202                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6203                            mSpacingAdd, mIncludePad, mEllipsize,
6204                            ellipsisWidth);
6205            } else {
6206                mHintLayout = new StaticLayout(mHint, mTextPaint,
6207                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6208                        mIncludePad);
6209            }
6210        }
6211
6212        if (bringIntoView) {
6213            registerForPreDraw();
6214        }
6215
6216        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6217            if (!compressText(ellipsisWidth)) {
6218                final int height = mLayoutParams.height;
6219                // If the size of the view does not depend on the size of the text, try to
6220                // start the marquee immediately
6221                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6222                    startMarquee();
6223                } else {
6224                    // Defer the start of the marquee until we know our width (see setFrame())
6225                    mRestartMarquee = true;
6226                }
6227            }
6228        }
6229
6230        // CursorControllers need a non-null mLayout
6231        prepareCursorControllers();
6232    }
6233
6234    private boolean compressText(float width) {
6235        if (isHardwareAccelerated()) return false;
6236
6237        // Only compress the text if it hasn't been compressed by the previous pass
6238        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6239                mTextPaint.getTextScaleX() == 1.0f) {
6240            final float textWidth = mLayout.getLineWidth(0);
6241            final float overflow = (textWidth + 1.0f - width) / width;
6242            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6243                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6244                post(new Runnable() {
6245                    public void run() {
6246                        requestLayout();
6247                    }
6248                });
6249                return true;
6250            }
6251        }
6252
6253        return false;
6254    }
6255
6256    private static int desired(Layout layout) {
6257        int n = layout.getLineCount();
6258        CharSequence text = layout.getText();
6259        float max = 0;
6260
6261        // if any line was wrapped, we can't use it.
6262        // but it's ok for the last line not to have a newline
6263
6264        for (int i = 0; i < n - 1; i++) {
6265            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6266                return -1;
6267        }
6268
6269        for (int i = 0; i < n; i++) {
6270            max = Math.max(max, layout.getLineWidth(i));
6271        }
6272
6273        return (int) FloatMath.ceil(max);
6274    }
6275
6276    /**
6277     * Set whether the TextView includes extra top and bottom padding to make
6278     * room for accents that go above the normal ascent and descent.
6279     * The default is true.
6280     *
6281     * @attr ref android.R.styleable#TextView_includeFontPadding
6282     */
6283    public void setIncludeFontPadding(boolean includepad) {
6284        if (mIncludePad != includepad) {
6285            mIncludePad = includepad;
6286
6287            if (mLayout != null) {
6288                nullLayouts();
6289                requestLayout();
6290                invalidate();
6291            }
6292        }
6293    }
6294
6295    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6296
6297    @Override
6298    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6299        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6300        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6301        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6302        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6303
6304        int width;
6305        int height;
6306
6307        BoringLayout.Metrics boring = UNKNOWN_BORING;
6308        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6309
6310        if (mTextDir == null) {
6311            resolveTextDirection();
6312        }
6313
6314        int des = -1;
6315        boolean fromexisting = false;
6316
6317        if (widthMode == MeasureSpec.EXACTLY) {
6318            // Parent has told us how big to be. So be it.
6319            width = widthSize;
6320        } else {
6321            if (mLayout != null && mEllipsize == null) {
6322                des = desired(mLayout);
6323            }
6324
6325            if (des < 0) {
6326                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6327                if (boring != null) {
6328                    mBoring = boring;
6329                }
6330            } else {
6331                fromexisting = true;
6332            }
6333
6334            if (boring == null || boring == UNKNOWN_BORING) {
6335                if (des < 0) {
6336                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6337                }
6338
6339                width = des;
6340            } else {
6341                width = boring.width;
6342            }
6343
6344            final Drawables dr = mDrawables;
6345            if (dr != null) {
6346                width = Math.max(width, dr.mDrawableWidthTop);
6347                width = Math.max(width, dr.mDrawableWidthBottom);
6348            }
6349
6350            if (mHint != null) {
6351                int hintDes = -1;
6352                int hintWidth;
6353
6354                if (mHintLayout != null && mEllipsize == null) {
6355                    hintDes = desired(mHintLayout);
6356                }
6357
6358                if (hintDes < 0) {
6359                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6360                    if (hintBoring != null) {
6361                        mHintBoring = hintBoring;
6362                    }
6363                }
6364
6365                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6366                    if (hintDes < 0) {
6367                        hintDes = (int) FloatMath.ceil(
6368                                Layout.getDesiredWidth(mHint, mTextPaint));
6369                    }
6370
6371                    hintWidth = hintDes;
6372                } else {
6373                    hintWidth = hintBoring.width;
6374                }
6375
6376                if (hintWidth > width) {
6377                    width = hintWidth;
6378                }
6379            }
6380
6381            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6382
6383            if (mMaxWidthMode == EMS) {
6384                width = Math.min(width, mMaxWidth * getLineHeight());
6385            } else {
6386                width = Math.min(width, mMaxWidth);
6387            }
6388
6389            if (mMinWidthMode == EMS) {
6390                width = Math.max(width, mMinWidth * getLineHeight());
6391            } else {
6392                width = Math.max(width, mMinWidth);
6393            }
6394
6395            // Check against our minimum width
6396            width = Math.max(width, getSuggestedMinimumWidth());
6397
6398            if (widthMode == MeasureSpec.AT_MOST) {
6399                width = Math.min(widthSize, width);
6400            }
6401        }
6402
6403        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6404        int unpaddedWidth = want;
6405
6406        if (mHorizontallyScrolling) want = VERY_WIDE;
6407
6408        int hintWant = want;
6409        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
6410
6411        if (mLayout == null) {
6412            makeNewLayout(want, hintWant, boring, hintBoring,
6413                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6414        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
6415                   (mLayout.getEllipsizedWidth() !=
6416                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6417            if (mHint == null && mEllipsize == null &&
6418                    want > mLayout.getWidth() &&
6419                    (mLayout instanceof BoringLayout ||
6420                            (fromexisting && des >= 0 && des <= want))) {
6421                mLayout.increaseWidthTo(want);
6422            } else {
6423                makeNewLayout(want, hintWant, boring, hintBoring,
6424                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6425            }
6426        } else {
6427            // Width has not changed.
6428        }
6429
6430        if (heightMode == MeasureSpec.EXACTLY) {
6431            // Parent has told us how big to be. So be it.
6432            height = heightSize;
6433            mDesiredHeightAtMeasure = -1;
6434        } else {
6435            int desired = getDesiredHeight();
6436
6437            height = desired;
6438            mDesiredHeightAtMeasure = desired;
6439
6440            if (heightMode == MeasureSpec.AT_MOST) {
6441                height = Math.min(desired, heightSize);
6442            }
6443        }
6444
6445        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6446        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6447            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6448        }
6449
6450        /*
6451         * We didn't let makeNewLayout() register to bring the cursor into view,
6452         * so do it here if there is any possibility that it is needed.
6453         */
6454        if (mMovement != null ||
6455            mLayout.getWidth() > unpaddedWidth ||
6456            mLayout.getHeight() > unpaddedHeight) {
6457            registerForPreDraw();
6458        } else {
6459            scrollTo(0, 0);
6460        }
6461
6462        setMeasuredDimension(width, height);
6463    }
6464
6465    private int getDesiredHeight() {
6466        return Math.max(
6467                getDesiredHeight(mLayout, true),
6468                getDesiredHeight(mHintLayout, mEllipsize != null));
6469    }
6470
6471    private int getDesiredHeight(Layout layout, boolean cap) {
6472        if (layout == null) {
6473            return 0;
6474        }
6475
6476        int linecount = layout.getLineCount();
6477        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6478        int desired = layout.getLineTop(linecount);
6479
6480        final Drawables dr = mDrawables;
6481        if (dr != null) {
6482            desired = Math.max(desired, dr.mDrawableHeightLeft);
6483            desired = Math.max(desired, dr.mDrawableHeightRight);
6484        }
6485
6486        desired += pad;
6487        layout.setMaximumVisibleLineCount(0);
6488
6489        if (mMaxMode == LINES) {
6490            /*
6491             * Don't cap the hint to a certain number of lines.
6492             * (Do cap it, though, if we have a maximum pixel height.)
6493             */
6494            if (cap) {
6495                if (linecount > mMaximum) {
6496                    layout.setMaximumVisibleLineCount(mMaximum);
6497                    desired = layout.getLineTop(mMaximum);
6498
6499                    if (dr != null) {
6500                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6501                        desired = Math.max(desired, dr.mDrawableHeightRight);
6502                    }
6503
6504                    desired += pad;
6505                    linecount = mMaximum;
6506                }
6507            }
6508        } else {
6509            desired = Math.min(desired, mMaximum);
6510        }
6511
6512        if (mMinMode == LINES) {
6513            if (linecount < mMinimum) {
6514                desired += getLineHeight() * (mMinimum - linecount);
6515            }
6516        } else {
6517            desired = Math.max(desired, mMinimum);
6518        }
6519
6520        // Check against our minimum height
6521        desired = Math.max(desired, getSuggestedMinimumHeight());
6522
6523        return desired;
6524    }
6525
6526    /**
6527     * Check whether a change to the existing text layout requires a
6528     * new view layout.
6529     */
6530    private void checkForResize() {
6531        boolean sizeChanged = false;
6532
6533        if (mLayout != null) {
6534            // Check if our width changed
6535            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6536                sizeChanged = true;
6537                invalidate();
6538            }
6539
6540            // Check if our height changed
6541            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6542                int desiredHeight = getDesiredHeight();
6543
6544                if (desiredHeight != this.getHeight()) {
6545                    sizeChanged = true;
6546                }
6547            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6548                if (mDesiredHeightAtMeasure >= 0) {
6549                    int desiredHeight = getDesiredHeight();
6550
6551                    if (desiredHeight != mDesiredHeightAtMeasure) {
6552                        sizeChanged = true;
6553                    }
6554                }
6555            }
6556        }
6557
6558        if (sizeChanged) {
6559            requestLayout();
6560            // caller will have already invalidated
6561        }
6562    }
6563
6564    /**
6565     * Check whether entirely new text requires a new view layout
6566     * or merely a new text layout.
6567     */
6568    private void checkForRelayout() {
6569        // If we have a fixed width, we can just swap in a new text layout
6570        // if the text height stays the same or if the view height is fixed.
6571
6572        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6573                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6574                (mHint == null || mHintLayout != null) &&
6575                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6576            // Static width, so try making a new text layout.
6577
6578            int oldht = mLayout.getHeight();
6579            int want = mLayout.getWidth();
6580            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6581
6582            /*
6583             * No need to bring the text into view, since the size is not
6584             * changing (unless we do the requestLayout(), in which case it
6585             * will happen at measure).
6586             */
6587            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6588                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6589                          false);
6590
6591            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6592                // In a fixed-height view, so use our new text layout.
6593                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6594                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6595                    invalidate();
6596                    return;
6597                }
6598
6599                // Dynamic height, but height has stayed the same,
6600                // so use our new text layout.
6601                if (mLayout.getHeight() == oldht &&
6602                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6603                    invalidate();
6604                    return;
6605                }
6606            }
6607
6608            // We lose: the height has changed and we have a dynamic height.
6609            // Request a new view layout using our new text layout.
6610            requestLayout();
6611            invalidate();
6612        } else {
6613            // Dynamic width, so we have no choice but to request a new
6614            // view layout with a new text layout.
6615            nullLayouts();
6616            requestLayout();
6617            invalidate();
6618        }
6619    }
6620
6621    /**
6622     * Returns true if anything changed.
6623     */
6624    private boolean bringTextIntoView() {
6625        int line = 0;
6626        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6627            line = mLayout.getLineCount() - 1;
6628        }
6629
6630        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6631        int dir = mLayout.getParagraphDirection(line);
6632        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6633        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6634        int ht = mLayout.getHeight();
6635
6636        int scrollx, scrolly;
6637
6638        // Convert to left, center, or right alignment.
6639        if (a == Layout.Alignment.ALIGN_NORMAL) {
6640            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6641                Layout.Alignment.ALIGN_RIGHT;
6642        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6643            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6644                Layout.Alignment.ALIGN_LEFT;
6645        }
6646
6647        if (a == Layout.Alignment.ALIGN_CENTER) {
6648            /*
6649             * Keep centered if possible, or, if it is too wide to fit,
6650             * keep leading edge in view.
6651             */
6652
6653            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6654            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6655
6656            if (right - left < hspace) {
6657                scrollx = (right + left) / 2 - hspace / 2;
6658            } else {
6659                if (dir < 0) {
6660                    scrollx = right - hspace;
6661                } else {
6662                    scrollx = left;
6663                }
6664            }
6665        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6666            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6667            scrollx = right - hspace;
6668        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6669            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6670        }
6671
6672        if (ht < vspace) {
6673            scrolly = 0;
6674        } else {
6675            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6676                scrolly = ht - vspace;
6677            } else {
6678                scrolly = 0;
6679            }
6680        }
6681
6682        if (scrollx != mScrollX || scrolly != mScrollY) {
6683            scrollTo(scrollx, scrolly);
6684            return true;
6685        } else {
6686            return false;
6687        }
6688    }
6689
6690    /**
6691     * Move the point, specified by the offset, into the view if it is needed.
6692     * This has to be called after layout. Returns true if anything changed.
6693     */
6694    public boolean bringPointIntoView(int offset) {
6695        boolean changed = false;
6696
6697        if (mLayout == null) return changed;
6698
6699        int line = mLayout.getLineForOffset(offset);
6700
6701        // FIXME: Is it okay to truncate this, or should we round?
6702        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6703        final int top = mLayout.getLineTop(line);
6704        final int bottom = mLayout.getLineTop(line + 1);
6705
6706        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6707        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6708        int ht = mLayout.getHeight();
6709
6710        int grav;
6711
6712        switch (mLayout.getParagraphAlignment(line)) {
6713            case ALIGN_LEFT:
6714                grav = 1;
6715                break;
6716            case ALIGN_RIGHT:
6717                grav = -1;
6718                break;
6719            case ALIGN_NORMAL:
6720                grav = mLayout.getParagraphDirection(line);
6721                break;
6722            case ALIGN_OPPOSITE:
6723                grav = -mLayout.getParagraphDirection(line);
6724                break;
6725            case ALIGN_CENTER:
6726            default:
6727                grav = 0;
6728                break;
6729        }
6730
6731        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6732        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6733
6734        int hslack = (bottom - top) / 2;
6735        int vslack = hslack;
6736
6737        if (vslack > vspace / 4)
6738            vslack = vspace / 4;
6739        if (hslack > hspace / 4)
6740            hslack = hspace / 4;
6741
6742        int hs = mScrollX;
6743        int vs = mScrollY;
6744
6745        if (top - vs < vslack)
6746            vs = top - vslack;
6747        if (bottom - vs > vspace - vslack)
6748            vs = bottom - (vspace - vslack);
6749        if (ht - vs < vspace)
6750            vs = ht - vspace;
6751        if (0 - vs > 0)
6752            vs = 0;
6753
6754        if (grav != 0) {
6755            if (x - hs < hslack) {
6756                hs = x - hslack;
6757            }
6758            if (x - hs > hspace - hslack) {
6759                hs = x - (hspace - hslack);
6760            }
6761        }
6762
6763        if (grav < 0) {
6764            if (left - hs > 0)
6765                hs = left;
6766            if (right - hs < hspace)
6767                hs = right - hspace;
6768        } else if (grav > 0) {
6769            if (right - hs < hspace)
6770                hs = right - hspace;
6771            if (left - hs > 0)
6772                hs = left;
6773        } else /* grav == 0 */ {
6774            if (right - left <= hspace) {
6775                /*
6776                 * If the entire text fits, center it exactly.
6777                 */
6778                hs = left - (hspace - (right - left)) / 2;
6779            } else if (x > right - hslack) {
6780                /*
6781                 * If we are near the right edge, keep the right edge
6782                 * at the edge of the view.
6783                 */
6784                hs = right - hspace;
6785            } else if (x < left + hslack) {
6786                /*
6787                 * If we are near the left edge, keep the left edge
6788                 * at the edge of the view.
6789                 */
6790                hs = left;
6791            } else if (left > hs) {
6792                /*
6793                 * Is there whitespace visible at the left?  Fix it if so.
6794                 */
6795                hs = left;
6796            } else if (right < hs + hspace) {
6797                /*
6798                 * Is there whitespace visible at the right?  Fix it if so.
6799                 */
6800                hs = right - hspace;
6801            } else {
6802                /*
6803                 * Otherwise, float as needed.
6804                 */
6805                if (x - hs < hslack) {
6806                    hs = x - hslack;
6807                }
6808                if (x - hs > hspace - hslack) {
6809                    hs = x - (hspace - hslack);
6810                }
6811            }
6812        }
6813
6814        if (hs != mScrollX || vs != mScrollY) {
6815            if (mScroller == null) {
6816                scrollTo(hs, vs);
6817            } else {
6818                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6819                int dx = hs - mScrollX;
6820                int dy = vs - mScrollY;
6821
6822                if (duration > ANIMATED_SCROLL_GAP) {
6823                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6824                    awakenScrollBars(mScroller.getDuration());
6825                    invalidate();
6826                } else {
6827                    if (!mScroller.isFinished()) {
6828                        mScroller.abortAnimation();
6829                    }
6830
6831                    scrollBy(dx, dy);
6832                }
6833
6834                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6835            }
6836
6837            changed = true;
6838        }
6839
6840        if (isFocused()) {
6841            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6842            // requestRectangleOnScreen() is in terms of content coordinates.
6843
6844            if (mTempRect == null) mTempRect = new Rect();
6845            // The offsets here are to ensure the rectangle we are using is
6846            // within our view bounds, in case the cursor is on the far left
6847            // or right.  If it isn't withing the bounds, then this request
6848            // will be ignored.
6849            mTempRect.set(x - 2, top, x + 2, bottom);
6850            getInterestingRect(mTempRect, line);
6851            mTempRect.offset(mScrollX, mScrollY);
6852
6853            if (requestRectangleOnScreen(mTempRect)) {
6854                changed = true;
6855            }
6856        }
6857
6858        return changed;
6859    }
6860
6861    /**
6862     * Move the cursor, if needed, so that it is at an offset that is visible
6863     * to the user.  This will not move the cursor if it represents more than
6864     * one character (a selection range).  This will only work if the
6865     * TextView contains spannable text; otherwise it will do nothing.
6866     *
6867     * @return True if the cursor was actually moved, false otherwise.
6868     */
6869    public boolean moveCursorToVisibleOffset() {
6870        if (!(mText instanceof Spannable)) {
6871            return false;
6872        }
6873        int start = getSelectionStart();
6874        int end = getSelectionEnd();
6875        if (start != end) {
6876            return false;
6877        }
6878
6879        // First: make sure the line is visible on screen:
6880
6881        int line = mLayout.getLineForOffset(start);
6882
6883        final int top = mLayout.getLineTop(line);
6884        final int bottom = mLayout.getLineTop(line + 1);
6885        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6886        int vslack = (bottom - top) / 2;
6887        if (vslack > vspace / 4)
6888            vslack = vspace / 4;
6889        final int vs = mScrollY;
6890
6891        if (top < (vs+vslack)) {
6892            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6893        } else if (bottom > (vspace+vs-vslack)) {
6894            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6895        }
6896
6897        // Next: make sure the character is visible on screen:
6898
6899        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6900        final int hs = mScrollX;
6901        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6902        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6903
6904        // line might contain bidirectional text
6905        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6906        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6907
6908        int newStart = start;
6909        if (newStart < lowChar) {
6910            newStart = lowChar;
6911        } else if (newStart > highChar) {
6912            newStart = highChar;
6913        }
6914
6915        if (newStart != start) {
6916            Selection.setSelection((Spannable)mText, newStart);
6917            return true;
6918        }
6919
6920        return false;
6921    }
6922
6923    @Override
6924    public void computeScroll() {
6925        if (mScroller != null) {
6926            if (mScroller.computeScrollOffset()) {
6927                mScrollX = mScroller.getCurrX();
6928                mScrollY = mScroller.getCurrY();
6929                invalidateParentCaches();
6930                postInvalidate();  // So we draw again
6931            }
6932        }
6933    }
6934
6935    private void getInterestingRect(Rect r, int line) {
6936        convertFromViewportToContentCoordinates(r);
6937
6938        // Rectangle can can be expanded on first and last line to take
6939        // padding into account.
6940        // TODO Take left/right padding into account too?
6941        if (line == 0) r.top -= getExtendedPaddingTop();
6942        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6943    }
6944
6945    private void convertFromViewportToContentCoordinates(Rect r) {
6946        final int horizontalOffset = viewportToContentHorizontalOffset();
6947        r.left += horizontalOffset;
6948        r.right += horizontalOffset;
6949
6950        final int verticalOffset = viewportToContentVerticalOffset();
6951        r.top += verticalOffset;
6952        r.bottom += verticalOffset;
6953    }
6954
6955    private int viewportToContentHorizontalOffset() {
6956        return getCompoundPaddingLeft() - mScrollX;
6957    }
6958
6959    private int viewportToContentVerticalOffset() {
6960        int offset = getExtendedPaddingTop() - mScrollY;
6961        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6962            offset += getVerticalOffset(false);
6963        }
6964        return offset;
6965    }
6966
6967    @Override
6968    public void debug(int depth) {
6969        super.debug(depth);
6970
6971        String output = debugIndent(depth);
6972        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6973                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6974                + "} ";
6975
6976        if (mText != null) {
6977
6978            output += "mText=\"" + mText + "\" ";
6979            if (mLayout != null) {
6980                output += "mLayout width=" + mLayout.getWidth()
6981                        + " height=" + mLayout.getHeight();
6982            }
6983        } else {
6984            output += "mText=NULL";
6985        }
6986        Log.d(VIEW_LOG_TAG, output);
6987    }
6988
6989    /**
6990     * Convenience for {@link Selection#getSelectionStart}.
6991     */
6992    @ViewDebug.ExportedProperty(category = "text")
6993    public int getSelectionStart() {
6994        return Selection.getSelectionStart(getText());
6995    }
6996
6997    /**
6998     * Convenience for {@link Selection#getSelectionEnd}.
6999     */
7000    @ViewDebug.ExportedProperty(category = "text")
7001    public int getSelectionEnd() {
7002        return Selection.getSelectionEnd(getText());
7003    }
7004
7005    /**
7006     * Return true iff there is a selection inside this text view.
7007     */
7008    public boolean hasSelection() {
7009        final int selectionStart = getSelectionStart();
7010        final int selectionEnd = getSelectionEnd();
7011
7012        return selectionStart >= 0 && selectionStart != selectionEnd;
7013    }
7014
7015    /**
7016     * Sets the properties of this field (lines, horizontally scrolling,
7017     * transformation method) to be for a single-line input.
7018     *
7019     * @attr ref android.R.styleable#TextView_singleLine
7020     */
7021    public void setSingleLine() {
7022        setSingleLine(true);
7023    }
7024
7025    /**
7026     * Sets the properties of this field to transform input to ALL CAPS
7027     * display. This may use a "small caps" formatting if available.
7028     * This setting will be ignored if this field is editable or selectable.
7029     *
7030     * This call replaces the current transformation method. Disabling this
7031     * will not necessarily restore the previous behavior from before this
7032     * was enabled.
7033     *
7034     * @see #setTransformationMethod(TransformationMethod)
7035     * @attr ref android.R.styleable#TextView_textAllCaps
7036     */
7037    public void setAllCaps(boolean allCaps) {
7038        if (allCaps) {
7039            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7040        } else {
7041            setTransformationMethod(null);
7042        }
7043    }
7044
7045    /**
7046     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7047     * transformation method) to be for a single-line input; if false, restores these to the default
7048     * conditions.
7049     *
7050     * Note that the default conditions are not necessarily those that were in effect prior this
7051     * method, and you may want to reset these properties to your custom values.
7052     *
7053     * @attr ref android.R.styleable#TextView_singleLine
7054     */
7055    @android.view.RemotableViewMethod
7056    public void setSingleLine(boolean singleLine) {
7057        // Could be used, but may break backward compatibility.
7058        // if (mSingleLine == singleLine) return;
7059        setInputTypeSingleLine(singleLine);
7060        applySingleLine(singleLine, true, true);
7061    }
7062
7063    /**
7064     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7065     * @param singleLine
7066     */
7067    private void setInputTypeSingleLine(boolean singleLine) {
7068        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7069            if (singleLine) {
7070                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7071            } else {
7072                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7073            }
7074        }
7075    }
7076
7077    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7078            boolean changeMaxLines) {
7079        mSingleLine = singleLine;
7080        if (singleLine) {
7081            setLines(1);
7082            setHorizontallyScrolling(true);
7083            if (applyTransformation) {
7084                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7085            }
7086        } else {
7087            if (changeMaxLines) {
7088                setMaxLines(Integer.MAX_VALUE);
7089            }
7090            setHorizontallyScrolling(false);
7091            if (applyTransformation) {
7092                setTransformationMethod(null);
7093            }
7094        }
7095    }
7096
7097    /**
7098     * Causes words in the text that are longer than the view is wide
7099     * to be ellipsized instead of broken in the middle.  You may also
7100     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7101     * to constrain the text to a single line.  Use <code>null</code>
7102     * to turn off ellipsizing.
7103     *
7104     * @attr ref android.R.styleable#TextView_ellipsize
7105     */
7106    public void setEllipsize(TextUtils.TruncateAt where) {
7107        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7108        if (mEllipsize != where) {
7109            mEllipsize = where;
7110
7111            if (mLayout != null) {
7112                nullLayouts();
7113                requestLayout();
7114                invalidate();
7115            }
7116        }
7117    }
7118
7119    /**
7120     * Sets how many times to repeat the marquee animation. Only applied if the
7121     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7122     *
7123     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7124     */
7125    public void setMarqueeRepeatLimit(int marqueeLimit) {
7126        mMarqueeRepeatLimit = marqueeLimit;
7127    }
7128
7129    /**
7130     * Returns where, if anywhere, words that are longer than the view
7131     * is wide should be ellipsized.
7132     */
7133    @ViewDebug.ExportedProperty
7134    public TextUtils.TruncateAt getEllipsize() {
7135        return mEllipsize;
7136    }
7137
7138    /**
7139     * Set the TextView so that when it takes focus, all the text is
7140     * selected.
7141     *
7142     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7143     */
7144    @android.view.RemotableViewMethod
7145    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7146        mSelectAllOnFocus = selectAllOnFocus;
7147
7148        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7149            setText(mText, BufferType.SPANNABLE);
7150        }
7151    }
7152
7153    /**
7154     * Set whether the cursor is visible.  The default is true.
7155     *
7156     * @attr ref android.R.styleable#TextView_cursorVisible
7157     */
7158    @android.view.RemotableViewMethod
7159    public void setCursorVisible(boolean visible) {
7160        if (mCursorVisible != visible) {
7161            mCursorVisible = visible;
7162            invalidate();
7163
7164            makeBlink();
7165
7166            // InsertionPointCursorController depends on mCursorVisible
7167            prepareCursorControllers();
7168        }
7169    }
7170
7171    private boolean isCursorVisible() {
7172        return mCursorVisible && isTextEditable();
7173    }
7174
7175    private boolean canMarquee() {
7176        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7177        return width > 0 && mLayout.getLineWidth(0) > width;
7178    }
7179
7180    private void startMarquee() {
7181        // Do not ellipsize EditText
7182        if (mInput != null) return;
7183
7184        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7185            return;
7186        }
7187
7188        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7189                getLineCount() == 1 && canMarquee()) {
7190
7191            if (mMarquee == null) mMarquee = new Marquee(this);
7192            mMarquee.start(mMarqueeRepeatLimit);
7193        }
7194    }
7195
7196    private void stopMarquee() {
7197        if (mMarquee != null && !mMarquee.isStopped()) {
7198            mMarquee.stop();
7199        }
7200    }
7201
7202    private void startStopMarquee(boolean start) {
7203        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7204            if (start) {
7205                startMarquee();
7206            } else {
7207                stopMarquee();
7208            }
7209        }
7210    }
7211
7212    private static final class Marquee extends Handler {
7213        // TODO: Add an option to configure this
7214        private static final float MARQUEE_DELTA_MAX = 0.07f;
7215        private static final int MARQUEE_DELAY = 1200;
7216        private static final int MARQUEE_RESTART_DELAY = 1200;
7217        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7218        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7219
7220        private static final byte MARQUEE_STOPPED = 0x0;
7221        private static final byte MARQUEE_STARTING = 0x1;
7222        private static final byte MARQUEE_RUNNING = 0x2;
7223
7224        private static final int MESSAGE_START = 0x1;
7225        private static final int MESSAGE_TICK = 0x2;
7226        private static final int MESSAGE_RESTART = 0x3;
7227
7228        private final WeakReference<TextView> mView;
7229
7230        private byte mStatus = MARQUEE_STOPPED;
7231        private final float mScrollUnit;
7232        private float mMaxScroll;
7233        float mMaxFadeScroll;
7234        private float mGhostStart;
7235        private float mGhostOffset;
7236        private float mFadeStop;
7237        private int mRepeatLimit;
7238
7239        float mScroll;
7240
7241        Marquee(TextView v) {
7242            final float density = v.getContext().getResources().getDisplayMetrics().density;
7243            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7244            mView = new WeakReference<TextView>(v);
7245        }
7246
7247        @Override
7248        public void handleMessage(Message msg) {
7249            switch (msg.what) {
7250                case MESSAGE_START:
7251                    mStatus = MARQUEE_RUNNING;
7252                    tick();
7253                    break;
7254                case MESSAGE_TICK:
7255                    tick();
7256                    break;
7257                case MESSAGE_RESTART:
7258                    if (mStatus == MARQUEE_RUNNING) {
7259                        if (mRepeatLimit >= 0) {
7260                            mRepeatLimit--;
7261                        }
7262                        start(mRepeatLimit);
7263                    }
7264                    break;
7265            }
7266        }
7267
7268        void tick() {
7269            if (mStatus != MARQUEE_RUNNING) {
7270                return;
7271            }
7272
7273            removeMessages(MESSAGE_TICK);
7274
7275            final TextView textView = mView.get();
7276            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7277                mScroll += mScrollUnit;
7278                if (mScroll > mMaxScroll) {
7279                    mScroll = mMaxScroll;
7280                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7281                } else {
7282                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7283                }
7284                textView.invalidate();
7285            }
7286        }
7287
7288        void stop() {
7289            mStatus = MARQUEE_STOPPED;
7290            removeMessages(MESSAGE_START);
7291            removeMessages(MESSAGE_RESTART);
7292            removeMessages(MESSAGE_TICK);
7293            resetScroll();
7294        }
7295
7296        private void resetScroll() {
7297            mScroll = 0.0f;
7298            final TextView textView = mView.get();
7299            if (textView != null) textView.invalidate();
7300        }
7301
7302        void start(int repeatLimit) {
7303            if (repeatLimit == 0) {
7304                stop();
7305                return;
7306            }
7307            mRepeatLimit = repeatLimit;
7308            final TextView textView = mView.get();
7309            if (textView != null && textView.mLayout != null) {
7310                mStatus = MARQUEE_STARTING;
7311                mScroll = 0.0f;
7312                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7313                        textView.getCompoundPaddingRight();
7314                final float lineWidth = textView.mLayout.getLineWidth(0);
7315                final float gap = textWidth / 3.0f;
7316                mGhostStart = lineWidth - textWidth + gap;
7317                mMaxScroll = mGhostStart + textWidth;
7318                mGhostOffset = lineWidth + gap;
7319                mFadeStop = lineWidth + textWidth / 6.0f;
7320                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7321
7322                textView.invalidate();
7323                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7324            }
7325        }
7326
7327        float getGhostOffset() {
7328            return mGhostOffset;
7329        }
7330
7331        boolean shouldDrawLeftFade() {
7332            return mScroll <= mFadeStop;
7333        }
7334
7335        boolean shouldDrawGhost() {
7336            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7337        }
7338
7339        boolean isRunning() {
7340            return mStatus == MARQUEE_RUNNING;
7341        }
7342
7343        boolean isStopped() {
7344            return mStatus == MARQUEE_STOPPED;
7345        }
7346    }
7347
7348    /**
7349     * This method is called when the text is changed, in case any subclasses
7350     * would like to know.
7351     *
7352     * Within <code>text</code>, the <code>lengthAfter</code> characters
7353     * beginning at <code>start</code> have just replaced old text that had
7354     * length <code>lengthBefore</code>. It is an error to attempt to make
7355     * changes to <code>text</code> from this callback.
7356     *
7357     * @param text The text the TextView is displaying
7358     * @param start The offset of the start of the range of the text that was
7359     * modified
7360     * @param lengthBefore The length of the former text that has been replaced
7361     * @param lengthAfter The length of the replacement modified text
7362     */
7363    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7364        // intentionally empty
7365    }
7366
7367    /**
7368     * This method is called when the selection has changed, in case any
7369     * subclasses would like to know.
7370     *
7371     * @param selStart The new selection start location.
7372     * @param selEnd The new selection end location.
7373     */
7374    protected void onSelectionChanged(int selStart, int selEnd) {
7375        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7376    }
7377
7378    /**
7379     * Adds a TextWatcher to the list of those whose methods are called
7380     * whenever this TextView's text changes.
7381     * <p>
7382     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7383     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7384     * if there are any text changed listeners forces the buffer type to
7385     * Editable if it would not otherwise be and does call this method.
7386     */
7387    public void addTextChangedListener(TextWatcher watcher) {
7388        if (mListeners == null) {
7389            mListeners = new ArrayList<TextWatcher>();
7390        }
7391
7392        mListeners.add(watcher);
7393    }
7394
7395    /**
7396     * Removes the specified TextWatcher from the list of those whose
7397     * methods are called
7398     * whenever this TextView's text changes.
7399     */
7400    public void removeTextChangedListener(TextWatcher watcher) {
7401        if (mListeners != null) {
7402            int i = mListeners.indexOf(watcher);
7403
7404            if (i >= 0) {
7405                mListeners.remove(i);
7406            }
7407        }
7408    }
7409
7410    private void sendBeforeTextChanged(CharSequence text, int start, int before,
7411                                   int after) {
7412        if (mListeners != null) {
7413            final ArrayList<TextWatcher> list = mListeners;
7414            final int count = list.size();
7415            for (int i = 0; i < count; i++) {
7416                list.get(i).beforeTextChanged(text, start, before, after);
7417            }
7418        }
7419    }
7420
7421    /**
7422     * Not private so it can be called from an inner class without going
7423     * through a thunk.
7424     */
7425    void sendOnTextChanged(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).onTextChanged(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 sendAfterTextChanged(Editable text) {
7441        if (mListeners != null) {
7442            final ArrayList<TextWatcher> list = mListeners;
7443            final int count = list.size();
7444            for (int i = 0; i < count; i++) {
7445                list.get(i).afterTextChanged(text);
7446            }
7447        }
7448    }
7449
7450    /**
7451     * Not private so it can be called from an inner class without going
7452     * through a thunk.
7453     */
7454    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7455        final InputMethodState ims = mInputMethodState;
7456        if (ims == null || ims.mBatchEditNesting == 0) {
7457            updateAfterEdit();
7458        }
7459        if (ims != null) {
7460            ims.mContentChanged = true;
7461            if (ims.mChangedStart < 0) {
7462                ims.mChangedStart = start;
7463                ims.mChangedEnd = start+before;
7464            } else {
7465                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7466                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7467            }
7468            ims.mChangedDelta += after-before;
7469        }
7470
7471        sendOnTextChanged(buffer, start, before, after);
7472        onTextChanged(buffer, start, before, after);
7473
7474        // Hide the controllers if the amount of content changed
7475        if (before != after) {
7476            hideControllers();
7477        }
7478    }
7479
7480    /**
7481     * Not private so it can be called from an inner class without going
7482     * through a thunk.
7483     */
7484    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7485        // XXX Make the start and end move together if this ends up
7486        // spending too much time invalidating.
7487
7488        boolean selChanged = false;
7489        int newSelStart=-1, newSelEnd=-1;
7490
7491        final InputMethodState ims = mInputMethodState;
7492
7493        if (what == Selection.SELECTION_END) {
7494            mHighlightPathBogus = true;
7495            selChanged = true;
7496            newSelEnd = newStart;
7497
7498            if (!isFocused()) {
7499                mSelectionMoved = true;
7500            }
7501
7502            if (oldStart >= 0 || newStart >= 0) {
7503                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7504                registerForPreDraw();
7505                makeBlink();
7506            }
7507        }
7508
7509        if (what == Selection.SELECTION_START) {
7510            mHighlightPathBogus = true;
7511            selChanged = true;
7512            newSelStart = newStart;
7513
7514            if (!isFocused()) {
7515                mSelectionMoved = true;
7516            }
7517
7518            if (oldStart >= 0 || newStart >= 0) {
7519                int end = Selection.getSelectionEnd(buf);
7520                invalidateCursor(end, oldStart, newStart);
7521            }
7522        }
7523
7524        if (selChanged) {
7525            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7526                if (newSelStart < 0) {
7527                    newSelStart = Selection.getSelectionStart(buf);
7528                }
7529                if (newSelEnd < 0) {
7530                    newSelEnd = Selection.getSelectionEnd(buf);
7531                }
7532                onSelectionChanged(newSelStart, newSelEnd);
7533            }
7534        }
7535
7536        if (what instanceof UpdateAppearance ||
7537            what instanceof ParagraphStyle) {
7538            if (ims == null || ims.mBatchEditNesting == 0) {
7539                invalidate();
7540                mHighlightPathBogus = true;
7541                checkForResize();
7542            } else {
7543                ims.mContentChanged = true;
7544            }
7545        }
7546
7547        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7548            mHighlightPathBogus = true;
7549            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7550                ims.mSelectionModeChanged = true;
7551            }
7552
7553            if (Selection.getSelectionStart(buf) >= 0) {
7554                if (ims == null || ims.mBatchEditNesting == 0) {
7555                    invalidateCursor();
7556                } else {
7557                    ims.mCursorChanged = true;
7558                }
7559            }
7560        }
7561
7562        if (what instanceof ParcelableSpan) {
7563            // If this is a span that can be sent to a remote process,
7564            // the current extract editor would be interested in it.
7565            if (ims != null && ims.mExtracting != null) {
7566                if (ims.mBatchEditNesting != 0) {
7567                    if (oldStart >= 0) {
7568                        if (ims.mChangedStart > oldStart) {
7569                            ims.mChangedStart = oldStart;
7570                        }
7571                        if (ims.mChangedStart > oldEnd) {
7572                            ims.mChangedStart = oldEnd;
7573                        }
7574                    }
7575                    if (newStart >= 0) {
7576                        if (ims.mChangedStart > newStart) {
7577                            ims.mChangedStart = newStart;
7578                        }
7579                        if (ims.mChangedStart > newEnd) {
7580                            ims.mChangedStart = newEnd;
7581                        }
7582                    }
7583                } else {
7584                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7585                            + oldStart + "-" + oldEnd + ","
7586                            + newStart + "-" + newEnd + what);
7587                    ims.mContentChanged = true;
7588                }
7589            }
7590        }
7591    }
7592
7593    private class ChangeWatcher
7594    implements TextWatcher, SpanWatcher {
7595
7596        private CharSequence mBeforeText;
7597
7598        public void beforeTextChanged(CharSequence buffer, int start,
7599                                      int before, int after) {
7600            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7601                    + " before=" + before + " after=" + after + ": " + buffer);
7602
7603            if (AccessibilityManager.getInstance(mContext).isEnabled()
7604                    && !isPasswordInputType(mInputType)
7605                    && !hasPasswordTransformationMethod()) {
7606                mBeforeText = buffer.toString();
7607            }
7608
7609            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7610        }
7611
7612        public void onTextChanged(CharSequence buffer, int start,
7613                                  int before, int after) {
7614            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7615                    + " before=" + before + " after=" + after + ": " + buffer);
7616            TextView.this.handleTextChanged(buffer, start, before, after);
7617
7618            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7619                    (isFocused() || isSelected() &&
7620                    isShown())) {
7621                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7622                mBeforeText = null;
7623            }
7624        }
7625
7626        public void afterTextChanged(Editable buffer) {
7627            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7628            TextView.this.sendAfterTextChanged(buffer);
7629
7630            if (MetaKeyKeyListener.getMetaState(buffer,
7631                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7632                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7633            }
7634        }
7635
7636        public void onSpanChanged(Spannable buf,
7637                                  Object what, int s, int e, int st, int en) {
7638            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7639                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7640            TextView.this.spanChange(buf, what, s, st, e, en);
7641        }
7642
7643        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7644            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7645                    + " what=" + what + ": " + buf);
7646            TextView.this.spanChange(buf, what, -1, s, -1, e);
7647        }
7648
7649        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7650            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7651                    + " what=" + what + ": " + buf);
7652            TextView.this.spanChange(buf, what, s, -1, e, -1);
7653        }
7654    }
7655
7656    /**
7657     * @hide
7658     */
7659    @Override
7660    public void dispatchFinishTemporaryDetach() {
7661        mDispatchTemporaryDetach = true;
7662        super.dispatchFinishTemporaryDetach();
7663        mDispatchTemporaryDetach = false;
7664    }
7665
7666    @Override
7667    public void onStartTemporaryDetach() {
7668        super.onStartTemporaryDetach();
7669        // Only track when onStartTemporaryDetach() is called directly,
7670        // usually because this instance is an editable field in a list
7671        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7672
7673        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7674        // selection becomes visible again. Until a better solution is found, stop text selection
7675        // mode (if any) as soon as this TextView is recycled.
7676        hideControllers();
7677    }
7678
7679    @Override
7680    public void onFinishTemporaryDetach() {
7681        super.onFinishTemporaryDetach();
7682        // Only track when onStartTemporaryDetach() is called directly,
7683        // usually because this instance is an editable field in a list
7684        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7685    }
7686
7687    @Override
7688    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7689        if (mTemporaryDetach) {
7690            // If we are temporarily in the detach state, then do nothing.
7691            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7692            return;
7693        }
7694
7695        mShowCursor = SystemClock.uptimeMillis();
7696
7697        ensureEndedBatchEdit();
7698
7699        if (focused) {
7700            int selStart = getSelectionStart();
7701            int selEnd = getSelectionEnd();
7702
7703            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7704            // mode for these, unless there was a specific selection already started.
7705            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7706                    selEnd == mText.length();
7707            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7708
7709            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7710                // If a tap was used to give focus to that view, move cursor at tap position.
7711                // Has to be done before onTakeFocus, which can be overloaded.
7712                final int lastTapPosition = getLastTapPosition();
7713                if (lastTapPosition >= 0) {
7714                    Selection.setSelection((Spannable) mText, lastTapPosition);
7715                }
7716
7717                if (mMovement != null) {
7718                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7719                }
7720
7721                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7722                // pressed. Since it is the ViewAncestor's mView, it requests focus before
7723                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7724                // This special case ensure that we keep current selection in that case.
7725                // It would be better to know why the DecorView does not have focus at that time.
7726                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7727                        selStart >= 0 && selEnd >= 0) {
7728                    /*
7729                     * Someone intentionally set the selection, so let them
7730                     * do whatever it is that they wanted to do instead of
7731                     * the default on-focus behavior.  We reset the selection
7732                     * here instead of just skipping the onTakeFocus() call
7733                     * because some movement methods do something other than
7734                     * just setting the selection in theirs and we still
7735                     * need to go through that path.
7736                     */
7737                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7738                }
7739
7740                if (mSelectAllOnFocus) {
7741                    selectAll();
7742                }
7743
7744                mTouchFocusSelected = true;
7745            }
7746
7747            mFrozenWithFocus = false;
7748            mSelectionMoved = false;
7749
7750            if (mText instanceof Spannable) {
7751                Spannable sp = (Spannable) mText;
7752                MetaKeyKeyListener.resetMetaState(sp);
7753            }
7754
7755            makeBlink();
7756
7757            if (mError != null) {
7758                showError();
7759            }
7760        } else {
7761            if (mError != null) {
7762                hideError();
7763            }
7764            // Don't leave us in the middle of a batch edit.
7765            onEndBatchEdit();
7766
7767            if (this instanceof ExtractEditText) {
7768                // terminateTextSelectionMode removes selection, which we want to keep when
7769                // ExtractEditText goes out of focus.
7770                final int selStart = getSelectionStart();
7771                final int selEnd = getSelectionEnd();
7772                hideControllers();
7773                Selection.setSelection((Spannable) mText, selStart, selEnd);
7774            } else {
7775                hideControllers();
7776            }
7777
7778            // No need to create the controller
7779            if (mSelectionModifierCursorController != null) {
7780                mSelectionModifierCursorController.resetTouchOffsets();
7781            }
7782        }
7783
7784        startStopMarquee(focused);
7785
7786        if (mTransformation != null) {
7787            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7788        }
7789
7790        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7791    }
7792
7793    private int getLastTapPosition() {
7794        // No need to create the controller at that point, no last tap position saved
7795        if (mSelectionModifierCursorController != null) {
7796            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7797            if (lastTapPosition >= 0) {
7798                // Safety check, should not be possible.
7799                if (lastTapPosition > mText.length()) {
7800                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7801                            + mText.length() + ")");
7802                    lastTapPosition = mText.length();
7803                }
7804                return lastTapPosition;
7805            }
7806        }
7807
7808        return -1;
7809    }
7810
7811    @Override
7812    public void onWindowFocusChanged(boolean hasWindowFocus) {
7813        super.onWindowFocusChanged(hasWindowFocus);
7814
7815        if (hasWindowFocus) {
7816            if (mBlink != null) {
7817                mBlink.uncancel();
7818                makeBlink();
7819            }
7820        } else {
7821            if (mBlink != null) {
7822                mBlink.cancel();
7823            }
7824            // Don't leave us in the middle of a batch edit.
7825            onEndBatchEdit();
7826            if (mInputContentType != null) {
7827                mInputContentType.enterDown = false;
7828            }
7829            hideControllers();
7830            removeAllSuggestionSpans();
7831        }
7832
7833        startStopMarquee(hasWindowFocus);
7834    }
7835
7836    private void removeAllSuggestionSpans() {
7837        if (mText instanceof Editable) {
7838            Editable editable = ((Editable) mText);
7839            SuggestionSpan[] spans = editable.getSpans(0, mText.length(), SuggestionSpan.class);
7840            final int length = spans.length;
7841            for (int i = 0; i < length; i++) {
7842                editable.removeSpan(spans[i]);
7843            }
7844        }
7845    }
7846
7847    @Override
7848    protected void onVisibilityChanged(View changedView, int visibility) {
7849        super.onVisibilityChanged(changedView, visibility);
7850        if (visibility != VISIBLE) {
7851            hideControllers();
7852        }
7853    }
7854
7855    /**
7856     * Use {@link BaseInputConnection#removeComposingSpans
7857     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7858     * state from this text view.
7859     */
7860    public void clearComposingText() {
7861        if (mText instanceof Spannable) {
7862            BaseInputConnection.removeComposingSpans((Spannable)mText);
7863        }
7864    }
7865
7866    @Override
7867    public void setSelected(boolean selected) {
7868        boolean wasSelected = isSelected();
7869
7870        super.setSelected(selected);
7871
7872        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7873            if (selected) {
7874                startMarquee();
7875            } else {
7876                stopMarquee();
7877            }
7878        }
7879    }
7880
7881    @Override
7882    public boolean onTouchEvent(MotionEvent event) {
7883        final int action = event.getActionMasked();
7884
7885        if (hasSelectionController()) {
7886            getSelectionController().onTouchEvent(event);
7887        }
7888
7889        if (action == MotionEvent.ACTION_DOWN) {
7890            mLastDownPositionX = event.getX();
7891            mLastDownPositionY = event.getY();
7892
7893            // Reset this state; it will be re-set if super.onTouchEvent
7894            // causes focus to move to the view.
7895            mTouchFocusSelected = false;
7896            mIgnoreActionUpEvent = false;
7897        }
7898
7899        final boolean superResult = super.onTouchEvent(event);
7900
7901        /*
7902         * Don't handle the release after a long press, because it will
7903         * move the selection away from whatever the menu action was
7904         * trying to affect.
7905         */
7906        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7907            mDiscardNextActionUp = false;
7908            return superResult;
7909        }
7910
7911        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7912                isFocused();
7913
7914        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7915                && mText instanceof Spannable && mLayout != null) {
7916            boolean handled = false;
7917
7918            if (mMovement != null) {
7919                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7920            }
7921
7922            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7923                // The LinkMovementMethod which should handle taps on links has not been installed
7924                // to support text selection. We reproduce its behavior here to open links.
7925                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7926                        getSelectionEnd(), ClickableSpan.class);
7927
7928                if (links.length != 0) {
7929                    links[0].onClick(this);
7930                    handled = true;
7931                }
7932            }
7933
7934            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7935                // Show the IME, except when selecting in read-only text.
7936                final InputMethodManager imm = InputMethodManager.peekInstance();
7937                if (imm != null) {
7938                    imm.viewClicked(this);
7939                }
7940                if (!mTextIsSelectable) {
7941                    handled |= imm != null && imm.showSoftInput(this, 0);
7942                }
7943
7944                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7945                if (!selectAllGotFocus && hasSelection()) {
7946                    startSelectionActionMode();
7947                } else {
7948                    hideControllers();
7949                    if (!selectAllGotFocus && mText.length() > 0) {
7950                        if (isCursorInsideEasyCorrectionSpan()) {
7951                            showSuggestions();
7952                        } else if (hasInsertionController()) {
7953                            getInsertionController().show();
7954                        }
7955                    }
7956                }
7957            }
7958
7959            if (handled) {
7960                return true;
7961            }
7962        }
7963
7964        return superResult;
7965    }
7966
7967    /**
7968     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
7969     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
7970     */
7971    private boolean isCursorInsideEasyCorrectionSpan() {
7972        Spannable spannable = (Spannable) TextView.this.mText;
7973        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
7974                getSelectionEnd(), SuggestionSpan.class);
7975        for (int i = 0; i < suggestionSpans.length; i++) {
7976            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
7977                return true;
7978            }
7979        }
7980        return false;
7981    }
7982
7983    @Override
7984    public boolean onGenericMotionEvent(MotionEvent event) {
7985        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7986            try {
7987                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7988                    return true;
7989                }
7990            } catch (AbstractMethodError ex) {
7991                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7992                // Ignore its absence in case third party applications implemented the
7993                // interface directly.
7994            }
7995        }
7996        return super.onGenericMotionEvent(event);
7997    }
7998
7999    private void prepareCursorControllers() {
8000        boolean windowSupportsHandles = false;
8001
8002        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8003        if (params instanceof WindowManager.LayoutParams) {
8004            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8005            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8006                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8007        }
8008
8009        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8010        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8011                mLayout != null;
8012
8013        if (!mInsertionControllerEnabled) {
8014            hideInsertionPointCursorController();
8015            if (mInsertionPointCursorController != null) {
8016                mInsertionPointCursorController.onDetached();
8017                mInsertionPointCursorController = null;
8018            }
8019        }
8020
8021        if (!mSelectionControllerEnabled) {
8022            stopSelectionActionMode();
8023            if (mSelectionModifierCursorController != null) {
8024                mSelectionModifierCursorController.onDetached();
8025                mSelectionModifierCursorController = null;
8026            }
8027        }
8028    }
8029
8030    /**
8031     * @return True iff this TextView contains a text that can be edited, or if this is
8032     * a selectable TextView.
8033     */
8034    private boolean isTextEditable() {
8035        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8036    }
8037
8038    /**
8039     * Returns true, only while processing a touch gesture, if the initial
8040     * touch down event caused focus to move to the text view and as a result
8041     * its selection changed.  Only valid while processing the touch gesture
8042     * of interest.
8043     */
8044    public boolean didTouchFocusSelect() {
8045        return mTouchFocusSelected;
8046    }
8047
8048    @Override
8049    public void cancelLongPress() {
8050        super.cancelLongPress();
8051        mIgnoreActionUpEvent = true;
8052    }
8053
8054    @Override
8055    public boolean onTrackballEvent(MotionEvent event) {
8056        if (mMovement != null && mText instanceof Spannable &&
8057            mLayout != null) {
8058            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8059                return true;
8060            }
8061        }
8062
8063        return super.onTrackballEvent(event);
8064    }
8065
8066    public void setScroller(Scroller s) {
8067        mScroller = s;
8068    }
8069
8070    private static class Blink extends Handler implements Runnable {
8071        private final WeakReference<TextView> mView;
8072        private boolean mCancelled;
8073
8074        public Blink(TextView v) {
8075            mView = new WeakReference<TextView>(v);
8076        }
8077
8078        public void run() {
8079            if (mCancelled) {
8080                return;
8081            }
8082
8083            removeCallbacks(Blink.this);
8084
8085            TextView tv = mView.get();
8086
8087            if (tv != null && tv.shouldBlink()) {
8088                if (tv.mLayout != null) {
8089                    tv.invalidateCursorPath();
8090                }
8091
8092                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8093            }
8094        }
8095
8096        void cancel() {
8097            if (!mCancelled) {
8098                removeCallbacks(Blink.this);
8099                mCancelled = true;
8100            }
8101        }
8102
8103        void uncancel() {
8104            mCancelled = false;
8105        }
8106    }
8107
8108    /**
8109     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8110     */
8111    private boolean shouldBlink() {
8112        if (!isFocused()) return false;
8113
8114        final int start = getSelectionStart();
8115        if (start < 0) return false;
8116
8117        final int end = getSelectionEnd();
8118        if (end < 0) return false;
8119
8120        return start == end;
8121    }
8122
8123    private void makeBlink() {
8124        if (isCursorVisible()) {
8125            if (shouldBlink()) {
8126                mShowCursor = SystemClock.uptimeMillis();
8127                if (mBlink == null) mBlink = new Blink(this);
8128                mBlink.removeCallbacks(mBlink);
8129                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8130            }
8131        } else {
8132            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8133        }
8134    }
8135
8136    @Override
8137    protected float getLeftFadingEdgeStrength() {
8138        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8139        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8140            if (mMarquee != null && !mMarquee.isStopped()) {
8141                final Marquee marquee = mMarquee;
8142                if (marquee.shouldDrawLeftFade()) {
8143                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8144                } else {
8145                    return 0.0f;
8146                }
8147            } else if (getLineCount() == 1) {
8148                final int layoutDirection = getResolvedLayoutDirection();
8149                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8150                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8151                    case Gravity.LEFT:
8152                        return 0.0f;
8153                    case Gravity.RIGHT:
8154                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8155                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8156                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8157                    case Gravity.CENTER_HORIZONTAL:
8158                        return 0.0f;
8159                }
8160            }
8161        }
8162        return super.getLeftFadingEdgeStrength();
8163    }
8164
8165    @Override
8166    protected float getRightFadingEdgeStrength() {
8167        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8168        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8169            if (mMarquee != null && !mMarquee.isStopped()) {
8170                final Marquee marquee = mMarquee;
8171                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8172            } else if (getLineCount() == 1) {
8173                final int layoutDirection = getResolvedLayoutDirection();
8174                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8175                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8176                    case Gravity.LEFT:
8177                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8178                                getCompoundPaddingRight();
8179                        final float lineWidth = mLayout.getLineWidth(0);
8180                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8181                    case Gravity.RIGHT:
8182                        return 0.0f;
8183                    case Gravity.CENTER_HORIZONTAL:
8184                    case Gravity.FILL_HORIZONTAL:
8185                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8186                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8187                                getHorizontalFadingEdgeLength();
8188                }
8189            }
8190        }
8191        return super.getRightFadingEdgeStrength();
8192    }
8193
8194    @Override
8195    protected int computeHorizontalScrollRange() {
8196        if (mLayout != null) {
8197            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8198                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8199        }
8200
8201        return super.computeHorizontalScrollRange();
8202    }
8203
8204    @Override
8205    protected int computeVerticalScrollRange() {
8206        if (mLayout != null)
8207            return mLayout.getHeight();
8208
8209        return super.computeVerticalScrollRange();
8210    }
8211
8212    @Override
8213    protected int computeVerticalScrollExtent() {
8214        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8215    }
8216
8217    @Override
8218    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched) {
8219        if (TextUtils.isEmpty(searched)) {
8220            return;
8221        }
8222        CharSequence thisText = getText();
8223        if (TextUtils.isEmpty(thisText)) {
8224            return;
8225        }
8226        String searchedLowerCase = searched.toString().toLowerCase();
8227        String thisTextLowerCase = thisText.toString().toLowerCase();
8228        if (thisTextLowerCase.contains(searchedLowerCase)) {
8229            outViews.add(this);
8230        }
8231    }
8232
8233    public enum BufferType {
8234        NORMAL, SPANNABLE, EDITABLE,
8235    }
8236
8237    /**
8238     * Returns the TextView_textColor attribute from the
8239     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8240     * from the TextView_textAppearance attribute, if TextView_textColor
8241     * was not set directly.
8242     */
8243    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8244        ColorStateList colors;
8245        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8246                                         TextView_textColor);
8247
8248        if (colors == null) {
8249            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8250                                         TextView_textAppearance, -1);
8251            if (ap != -1) {
8252                TypedArray appearance;
8253                appearance = context.obtainStyledAttributes(ap,
8254                                            com.android.internal.R.styleable.TextAppearance);
8255                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8256                                                  TextAppearance_textColor);
8257                appearance.recycle();
8258            }
8259        }
8260
8261        return colors;
8262    }
8263
8264    /**
8265     * Returns the default color from the TextView_textColor attribute
8266     * from the AttributeSet, if set, or the default color from the
8267     * TextAppearance_textColor from the TextView_textAppearance attribute,
8268     * if TextView_textColor was not set directly.
8269     */
8270    public static int getTextColor(Context context,
8271                                   TypedArray attrs,
8272                                   int def) {
8273        ColorStateList colors = getTextColors(context, attrs);
8274
8275        if (colors == null) {
8276            return def;
8277        } else {
8278            return colors.getDefaultColor();
8279        }
8280    }
8281
8282    @Override
8283    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8284        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8285        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8286            switch (keyCode) {
8287            case KeyEvent.KEYCODE_A:
8288                if (canSelectText()) {
8289                    return onTextContextMenuItem(ID_SELECT_ALL);
8290                }
8291                break;
8292            case KeyEvent.KEYCODE_X:
8293                if (canCut()) {
8294                    return onTextContextMenuItem(ID_CUT);
8295                }
8296                break;
8297            case KeyEvent.KEYCODE_C:
8298                if (canCopy()) {
8299                    return onTextContextMenuItem(ID_COPY);
8300                }
8301                break;
8302            case KeyEvent.KEYCODE_V:
8303                if (canPaste()) {
8304                    return onTextContextMenuItem(ID_PASTE);
8305                }
8306                break;
8307            }
8308        }
8309        return super.onKeyShortcut(keyCode, event);
8310    }
8311
8312    /**
8313     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8314     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8315     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8316     */
8317    private boolean canSelectText() {
8318        return hasSelectionController() && mText.length() != 0;
8319    }
8320
8321    /**
8322     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8323     * The text must be spannable and the movement method must allow for arbitary selection.
8324     *
8325     * See also {@link #canSelectText()}.
8326     */
8327    private boolean textCanBeSelected() {
8328        // prepareCursorController() relies on this method.
8329        // If you change this condition, make sure prepareCursorController is called anywhere
8330        // the value of this condition might be changed.
8331        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8332        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8333    }
8334
8335    private boolean canCut() {
8336        if (hasPasswordTransformationMethod()) {
8337            return false;
8338        }
8339
8340        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8341            return true;
8342        }
8343
8344        return false;
8345    }
8346
8347    private boolean canCopy() {
8348        if (hasPasswordTransformationMethod()) {
8349            return false;
8350        }
8351
8352        if (mText.length() > 0 && hasSelection()) {
8353            return true;
8354        }
8355
8356        return false;
8357    }
8358
8359    private boolean canPaste() {
8360        return (mText instanceof Editable &&
8361                mInput != null &&
8362                getSelectionStart() >= 0 &&
8363                getSelectionEnd() >= 0 &&
8364                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8365                hasPrimaryClip());
8366    }
8367
8368    private static long packRangeInLong(int start, int end) {
8369        return (((long) start) << 32) | end;
8370    }
8371
8372    private static int extractRangeStartFromLong(long range) {
8373        return (int) (range >>> 32);
8374    }
8375
8376    private static int extractRangeEndFromLong(long range) {
8377        return (int) (range & 0x00000000FFFFFFFFL);
8378    }
8379
8380    private boolean selectAll() {
8381        final int length = mText.length();
8382        Selection.setSelection((Spannable) mText, 0, length);
8383        return length > 0;
8384    }
8385
8386    /**
8387     * Adjusts selection to the word under last touch offset.
8388     * Return true if the operation was successfully performed.
8389     */
8390    private boolean selectCurrentWord() {
8391        if (!canSelectText()) {
8392            return false;
8393        }
8394
8395        if (hasPasswordTransformationMethod()) {
8396            // Always select all on a password field.
8397            // Cut/copy menu entries are not available for passwords, but being able to select all
8398            // is however useful to delete or paste to replace the entire content.
8399            return selectAll();
8400        }
8401
8402        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8403        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8404
8405        // Specific text field types: select the entire text for these
8406        if (klass == InputType.TYPE_CLASS_NUMBER ||
8407                klass == InputType.TYPE_CLASS_PHONE ||
8408                klass == InputType.TYPE_CLASS_DATETIME ||
8409                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8410                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8411                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8412                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8413            return selectAll();
8414        }
8415
8416        long lastTouchOffsets = getLastTouchOffsets();
8417        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8418        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8419
8420        // Safety check in case standard touch event handling has been bypassed
8421        if (minOffset < 0 || minOffset >= mText.length()) return false;
8422        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8423
8424        int selectionStart, selectionEnd;
8425
8426        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8427        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8428        if (urlSpans.length == 1) {
8429            URLSpan url = urlSpans[0];
8430            selectionStart = ((Spanned) mText).getSpanStart(url);
8431            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8432        } else {
8433            if (mWordIterator == null) {
8434                mWordIterator = new WordIterator();
8435            }
8436            // WordIerator handles text changes, this is a no-op if text in unchanged.
8437            mWordIterator.setCharSequence(mText);
8438
8439            selectionStart = mWordIterator.getBeginning(minOffset);
8440            if (selectionStart == BreakIterator.DONE) return false;
8441
8442            selectionEnd = mWordIterator.getEnd(maxOffset);
8443            if (selectionEnd == BreakIterator.DONE) return false;
8444        }
8445
8446        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8447        return true;
8448    }
8449
8450    private long getLastTouchOffsets() {
8451        int minOffset, maxOffset;
8452
8453        if (mContextMenuTriggeredByKey) {
8454            minOffset = getSelectionStart();
8455            maxOffset = getSelectionEnd();
8456        } else {
8457            SelectionModifierCursorController selectionController = getSelectionController();
8458            minOffset = selectionController.getMinTouchOffset();
8459            maxOffset = selectionController.getMaxTouchOffset();
8460        }
8461
8462        return packRangeInLong(minOffset, maxOffset);
8463    }
8464
8465    @Override
8466    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8467        super.onPopulateAccessibilityEvent(event);
8468
8469        final boolean isPassword = hasPasswordTransformationMethod();
8470        if (!isPassword) {
8471            CharSequence text = getText();
8472            if (TextUtils.isEmpty(text)) {
8473                text = getHint();
8474            }
8475            if (TextUtils.isEmpty(text)) {
8476                text = getContentDescription();
8477            }
8478            if (!TextUtils.isEmpty(text)) {
8479                event.getText().add(text);
8480            }
8481        }
8482    }
8483
8484    @Override
8485    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8486        super.onInitializeAccessibilityEvent(event);
8487
8488        final boolean isPassword = hasPasswordTransformationMethod();
8489        event.setPassword(isPassword);
8490
8491        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8492            event.setFromIndex(Selection.getSelectionStart(mText));
8493            event.setToIndex(Selection.getSelectionEnd(mText));
8494            event.setItemCount(mText.length());
8495        }
8496    }
8497
8498    @Override
8499    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
8500        super.onInitializeAccessibilityNodeInfo(info);
8501
8502        final boolean isPassword = hasPasswordTransformationMethod();
8503        if (!isPassword) {
8504            info.setText(getText());
8505        }
8506        info.setPassword(isPassword);
8507    }
8508
8509    @Override
8510    public void sendAccessibilityEvent(int eventType) {
8511        // Do not send scroll events since first they are not interesting for
8512        // accessibility and second such events a generated too frequently.
8513        // For details see the implementation of bringTextIntoView().
8514        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
8515            return;
8516        }
8517        super.sendAccessibilityEvent(eventType);
8518    }
8519
8520    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8521            int fromIndex, int removedCount, int addedCount) {
8522        AccessibilityEvent event =
8523            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8524        event.setFromIndex(fromIndex);
8525        event.setRemovedCount(removedCount);
8526        event.setAddedCount(addedCount);
8527        event.setBeforeText(beforeText);
8528        sendAccessibilityEventUnchecked(event);
8529    }
8530
8531    @Override
8532    protected void onCreateContextMenu(ContextMenu menu) {
8533        super.onCreateContextMenu(menu);
8534        boolean added = false;
8535        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
8536        // Problem with context menu on long press: the menu appears while the key in down and when
8537        // the key is released, the view does not receive the key_up event.
8538        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
8539        // events. We cannot simply clear these flags in onTextContextMenuItem since
8540        // it may not be called (if the user/ discards the context menu with the back key).
8541        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
8542        // available in onTextContextMenuItem.
8543        mDPadCenterIsDown = mEnterKeyIsDown = false;
8544
8545        MenuHandler handler = new MenuHandler();
8546
8547        if (mText instanceof Spanned && hasSelectionController()) {
8548            long lastTouchOffset = getLastTouchOffsets();
8549            final int selStart = extractRangeStartFromLong(lastTouchOffset);
8550            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
8551
8552            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
8553            if (urls.length > 0) {
8554                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
8555                        setOnMenuItemClickListener(handler);
8556
8557                added = true;
8558            }
8559        }
8560
8561        // The context menu is not empty, which will prevent the selection mode from starting.
8562        // Add a entry to start it in the context menu.
8563        // TODO Does not handle the case where a subclass does not call super.thisMethod or
8564        // populates the menu AFTER this call.
8565        if (menu.size() > 0) {
8566            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
8567                    setOnMenuItemClickListener(handler);
8568            added = true;
8569        }
8570
8571        if (added) {
8572            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
8573        }
8574    }
8575
8576    /**
8577     * Returns whether this text view is a current input method target.  The
8578     * default implementation just checks with {@link InputMethodManager}.
8579     */
8580    public boolean isInputMethodTarget() {
8581        InputMethodManager imm = InputMethodManager.peekInstance();
8582        return imm != null && imm.isActive(this);
8583    }
8584
8585    // Selection context mode
8586    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8587    private static final int ID_CUT = android.R.id.cut;
8588    private static final int ID_COPY = android.R.id.copy;
8589    private static final int ID_PASTE = android.R.id.paste;
8590    // Context menu entries
8591    private static final int ID_COPY_URL = android.R.id.copyUrl;
8592    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8593
8594    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8595        public boolean onMenuItemClick(MenuItem item) {
8596            return onTextContextMenuItem(item.getItemId());
8597        }
8598    }
8599
8600    /**
8601     * Called when a context menu option for the text view is selected.  Currently
8602     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8603     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8604     * or {@link android.R.id#copy}.
8605     *
8606     * @return true if the context menu item action was performed.
8607     */
8608    public boolean onTextContextMenuItem(int id) {
8609        int min = 0;
8610        int max = mText.length();
8611
8612        if (isFocused()) {
8613            final int selStart = getSelectionStart();
8614            final int selEnd = getSelectionEnd();
8615
8616            min = Math.max(0, Math.min(selStart, selEnd));
8617            max = Math.max(0, Math.max(selStart, selEnd));
8618        }
8619
8620        switch (id) {
8621            case ID_COPY_URL:
8622                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8623                if (urls.length >= 1) {
8624                    ClipData clip = null;
8625                    for (int i=0; i<urls.length; i++) {
8626                        Uri uri = Uri.parse(urls[0].getURL());
8627                        if (clip == null) {
8628                            clip = ClipData.newRawUri(null, uri);
8629                        } else {
8630                            clip.addItem(new ClipData.Item(uri));
8631                        }
8632                    }
8633                    if (clip != null) {
8634                        setPrimaryClip(clip);
8635                    }
8636                }
8637                stopSelectionActionMode();
8638                return true;
8639
8640            case ID_SELECTION_MODE:
8641                if (mSelectionActionMode != null) {
8642                    // Selection mode is already started, simply change selected part.
8643                    selectCurrentWord();
8644                } else {
8645                    startSelectionActionMode();
8646                }
8647                return true;
8648
8649            case ID_SELECT_ALL:
8650                // This does not enter text selection mode. Text is highlighted, so that it can be
8651                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8652                selectAll();
8653                return true;
8654
8655            case ID_PASTE:
8656                paste(min, max);
8657                return true;
8658
8659            case ID_CUT:
8660                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8661                ((Editable) mText).delete(min, max);
8662                stopSelectionActionMode();
8663                return true;
8664
8665            case ID_COPY:
8666                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8667                stopSelectionActionMode();
8668                return true;
8669        }
8670        return false;
8671    }
8672
8673    /**
8674     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8675     * by [min, max] when replacing this region by paste.
8676     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8677     * make sure we do not add an extra one from the paste content.
8678     */
8679    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8680        if (paste.length() > 0) {
8681            if (min > 0) {
8682                final char charBefore = mTransformed.charAt(min - 1);
8683                final char charAfter = paste.charAt(0);
8684
8685                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8686                    // Two spaces at beginning of paste: remove one
8687                    final int originalLength = mText.length();
8688                    ((Editable) mText).delete(min - 1, min);
8689                    // Due to filters, there is no guarantee that exactly one character was
8690                    // removed: count instead.
8691                    final int delta = mText.length() - originalLength;
8692                    min += delta;
8693                    max += delta;
8694                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8695                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8696                    // No space at beginning of paste: add one
8697                    final int originalLength = mText.length();
8698                    ((Editable) mText).replace(min, min, " ");
8699                    // Taking possible filters into account as above.
8700                    final int delta = mText.length() - originalLength;
8701                    min += delta;
8702                    max += delta;
8703                }
8704            }
8705
8706            if (max < mText.length()) {
8707                final char charBefore = paste.charAt(paste.length() - 1);
8708                final char charAfter = mTransformed.charAt(max);
8709
8710                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8711                    // Two spaces at end of paste: remove one
8712                    ((Editable) mText).delete(max, max + 1);
8713                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8714                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8715                    // No space at end of paste: add one
8716                    ((Editable) mText).replace(max, max, " ");
8717                }
8718            }
8719        }
8720
8721        return packRangeInLong(min, max);
8722    }
8723
8724    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8725        TextView shadowView = (TextView) inflate(mContext,
8726                com.android.internal.R.layout.text_drag_thumbnail, null);
8727
8728        if (shadowView == null) {
8729            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8730        }
8731
8732        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8733            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8734        }
8735        shadowView.setText(text);
8736        shadowView.setTextColor(getTextColors());
8737
8738        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8739        shadowView.setGravity(Gravity.CENTER);
8740
8741        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8742                ViewGroup.LayoutParams.WRAP_CONTENT));
8743
8744        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8745        shadowView.measure(size, size);
8746
8747        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8748        shadowView.invalidate();
8749        return new DragShadowBuilder(shadowView);
8750    }
8751
8752    private static class DragLocalState {
8753        public TextView sourceTextView;
8754        public int start, end;
8755
8756        public DragLocalState(TextView sourceTextView, int start, int end) {
8757            this.sourceTextView = sourceTextView;
8758            this.start = start;
8759            this.end = end;
8760        }
8761    }
8762
8763    @Override
8764    public boolean performLongClick() {
8765        if (super.performLongClick()) {
8766            mDiscardNextActionUp = true;
8767            return true;
8768        }
8769
8770        boolean handled = false;
8771
8772        // Long press in empty space moves cursor and shows the Paste affordance if available.
8773        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8774                mInsertionControllerEnabled) {
8775            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
8776            stopSelectionActionMode();
8777            Selection.setSelection((Spannable) mText, offset);
8778            getInsertionController().showImmediately();
8779            handled = true;
8780        }
8781
8782        if (!handled && mSelectionActionMode != null) {
8783            if (touchPositionIsInSelection()) {
8784                // Start a drag
8785                final int start = getSelectionStart();
8786                final int end = getSelectionEnd();
8787                CharSequence selectedText = mTransformed.subSequence(start, end);
8788                ClipData data = ClipData.newPlainText(null, selectedText);
8789                DragLocalState localState = new DragLocalState(this, start, end);
8790                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8791                stopSelectionActionMode();
8792            } else {
8793                selectCurrentWord();
8794            }
8795            handled = true;
8796        }
8797
8798        // Start a new selection
8799        handled |= !handled && startSelectionActionMode();
8800
8801        if (handled) {
8802            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8803            mDiscardNextActionUp = true;
8804        }
8805
8806        return handled;
8807    }
8808
8809    private boolean touchPositionIsInSelection() {
8810        int selectionStart = getSelectionStart();
8811        int selectionEnd = getSelectionEnd();
8812
8813        if (selectionStart == selectionEnd) {
8814            return false;
8815        }
8816
8817        if (selectionStart > selectionEnd) {
8818            int tmp = selectionStart;
8819            selectionStart = selectionEnd;
8820            selectionEnd = tmp;
8821            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8822        }
8823
8824        SelectionModifierCursorController selectionController = getSelectionController();
8825        int minOffset = selectionController.getMinTouchOffset();
8826        int maxOffset = selectionController.getMaxTouchOffset();
8827
8828        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8829    }
8830
8831    private PositionListener getPositionListener() {
8832        if (mPositionListener == null) {
8833            mPositionListener = new PositionListener();
8834        }
8835        return mPositionListener;
8836    }
8837
8838    private interface TextViewPositionListener {
8839        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified);
8840    }
8841
8842    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
8843        // 3 handles, 2 ActionPopup (suggestionsPopup first hides the others)
8844        private final int MAXIMUM_NUMBER_OF_LISTENERS = 5;
8845        private TextViewPositionListener[] mPositionListeners =
8846                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
8847        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
8848        private boolean mPositionHasChanged = true;
8849        // Absolute position of the TextView with respect to its parent window
8850        private int mPositionX, mPositionY;
8851        private int mNumberOfListeners;
8852
8853        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
8854            if (mNumberOfListeners == 0) {
8855                updatePosition();
8856                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8857                vto.addOnPreDrawListener(this);
8858            }
8859
8860            int emptySlotIndex = -1;
8861            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8862                TextViewPositionListener listener = mPositionListeners[i];
8863                if (listener == positionListener) {
8864                    return;
8865                } else if (emptySlotIndex < 0 && listener == null) {
8866                    emptySlotIndex = i;
8867                }
8868            }
8869
8870            mPositionListeners[emptySlotIndex] = positionListener;
8871            mCanMove[emptySlotIndex] = canMove;
8872            mNumberOfListeners++;
8873        }
8874
8875        public void removeSubscriber(TextViewPositionListener positionListener) {
8876            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8877                if (mPositionListeners[i] == positionListener) {
8878                    mPositionListeners[i] = null;
8879                    mNumberOfListeners--;
8880                    break;
8881                }
8882            }
8883
8884            if (mNumberOfListeners == 0) {
8885                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8886                vto.removeOnPreDrawListener(this);
8887            }
8888        }
8889
8890        public int getPositionX() {
8891            return mPositionX;
8892        }
8893
8894        public int getPositionY() {
8895            return mPositionY;
8896        }
8897
8898        @Override
8899        public boolean onPreDraw() {
8900            updatePosition();
8901
8902            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8903                if (mPositionHasChanged || mCanMove[i]) {
8904                    TextViewPositionListener positionListener = mPositionListeners[i];
8905                    if (positionListener != null) {
8906                        positionListener.updatePosition(mPositionX, mPositionY,
8907                                mPositionHasChanged);
8908                    }
8909                }
8910            }
8911
8912            return true;
8913        }
8914
8915        private void updatePosition() {
8916            TextView.this.getLocationInWindow(mTempCoords);
8917
8918            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
8919
8920            mPositionX = mTempCoords[0];
8921            mPositionY = mTempCoords[1];
8922        }
8923
8924        public boolean isVisible(int positionX, int positionY) {
8925            final TextView textView = TextView.this;
8926
8927            if (mTempRect == null) mTempRect = new Rect();
8928            final Rect clip = mTempRect;
8929            clip.left = getCompoundPaddingLeft();
8930            clip.top = getExtendedPaddingTop();
8931            clip.right = textView.getWidth() - getCompoundPaddingRight();
8932            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
8933
8934            final ViewParent parent = textView.getParent();
8935            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
8936                return false;
8937            }
8938
8939            int posX = mPositionX + positionX;
8940            int posY = mPositionY + positionY;
8941
8942            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
8943            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
8944                    posY >= clip.top && posY <= clip.bottom;
8945        }
8946
8947        public boolean isOffsetVisible(int offset) {
8948            final int line = mLayout.getLineForOffset(offset);
8949            final int lineBottom = mLayout.getLineBottom(line);
8950            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
8951            return isVisible(primaryHorizontal, lineBottom);
8952        }
8953    }
8954
8955    private abstract class PinnedPopupWindow implements TextViewPositionListener {
8956        protected PopupWindow mPopupWindow;
8957        protected LinearLayout mContentView;
8958        int mPositionX, mPositionY;
8959
8960        protected abstract void createPopupWindow();
8961        protected abstract void initContentView();
8962        protected abstract int getTextOffset();
8963        protected abstract int getVerticalLocalPosition(int line);
8964        protected abstract int clipVertically(int positionY);
8965
8966        public PinnedPopupWindow() {
8967            createPopupWindow();
8968
8969            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8970            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8971            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8972
8973            mContentView = new LinearLayout(TextView.this.getContext());
8974            LayoutParams wrapContent = new LayoutParams(
8975                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
8976            mContentView.setLayoutParams(wrapContent);
8977
8978            initContentView();
8979            mPopupWindow.setContentView(mContentView);
8980        }
8981
8982        public void show() {
8983            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
8984            mContentView.measure(
8985                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
8986                            View.MeasureSpec.AT_MOST),
8987                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
8988                            View.MeasureSpec.AT_MOST));
8989
8990            TextView.this.getPositionListener().addSubscriber(this, false);
8991
8992            computeLocalPosition();
8993
8994            final PositionListener positionListener = TextView.this.getPositionListener();
8995            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
8996        }
8997
8998        private void computeLocalPosition() {
8999            final int offset = getTextOffset();
9000
9001            final int width = mContentView.getMeasuredWidth();
9002            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9003            mPositionX += viewportToContentHorizontalOffset();
9004
9005            final int line = mLayout.getLineForOffset(offset);
9006            mPositionY = getVerticalLocalPosition(line);
9007            mPositionY += viewportToContentVerticalOffset();
9008        }
9009
9010        private void updatePosition(int parentPositionX, int parentPositionY) {
9011            int positionX = parentPositionX + mPositionX;
9012            int positionY = parentPositionY + mPositionY;
9013
9014            positionY = clipVertically(positionY);
9015
9016            // Horizontal clipping
9017            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9018            final int width = mContentView.getMeasuredWidth();
9019            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9020            positionX = Math.max(0, positionX);
9021
9022            if (isShowing()) {
9023                mPopupWindow.update(positionX, positionY, -1, -1);
9024            } else {
9025                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9026                        positionX, positionY);
9027            }
9028        }
9029
9030        public void hide() {
9031            mPopupWindow.dismiss();
9032            TextView.this.getPositionListener().removeSubscriber(this);
9033        }
9034
9035        @Override
9036        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
9037            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
9038                updatePosition(parentPositionX, parentPositionY);
9039            } else {
9040                hide();
9041            }
9042        }
9043
9044        public boolean isShowing() {
9045            return mPopupWindow.isShowing();
9046        }
9047    }
9048
9049    private static class SuggestionRangeSpan extends UnderlineSpan {
9050        // TODO themable, would be nice to make it a child class of TextAppearanceSpan, but
9051        // there is no way to have underline and TextAppearanceSpan.
9052    }
9053
9054    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnClickListener {
9055        private static final int MAX_NUMBER_SUGGESTIONS = 5;
9056        private static final int NO_SUGGESTIONS = -1;
9057        private WordIterator mSuggestionWordIterator;
9058        private TextAppearanceSpan[] mHighlightSpans = new TextAppearanceSpan[0];
9059
9060        @Override
9061        protected void createPopupWindow() {
9062            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9063                com.android.internal.R.attr.textSuggestionsWindowStyle);
9064            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9065            mPopupWindow.setOutsideTouchable(true);
9066            mPopupWindow.setClippingEnabled(false);
9067        }
9068
9069        @Override
9070        protected void initContentView() {
9071            mContentView.setOrientation(LinearLayout.VERTICAL);
9072
9073            LayoutInflater inflater = (LayoutInflater) TextView.this.mContext.
9074                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9075
9076            if (inflater == null) {
9077                throw new IllegalArgumentException(
9078                        "Unable to create inflater for TextEdit suggestions");
9079            }
9080
9081            // Inflate the suggestion items once and for all.
9082            for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
9083                View childView = inflater.inflate(mTextEditSuggestionItemLayout,
9084                        mContentView, false);
9085
9086                if (! (childView instanceof TextView)) {
9087                    throw new IllegalArgumentException(
9088                            "Inflated TextEdit suggestion item is not a TextView: " + childView);
9089                }
9090
9091                childView.setTag(new SuggestionInfo());
9092                mContentView.addView(childView);
9093                childView.setOnClickListener(this);
9094            }
9095        }
9096
9097        private class SuggestionInfo {
9098            int suggestionStart, suggestionEnd; // range of suggestion item with replacement text
9099            int spanStart, spanEnd; // range in TextView where text should be inserted
9100            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9101            int suggestionIndex; // the index of the suggestion inside suggestionSpan
9102        }
9103
9104        /**
9105         * Returns the suggestion spans that cover the current cursor position. The suggestion
9106         * spans are sorted according to the length of text that they are attached to.
9107         */
9108        private SuggestionSpan[] getSuggestionSpans() {
9109            int pos = TextView.this.getSelectionStart();
9110            Spannable spannable = (Spannable) TextView.this.mText;
9111            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9112
9113            // Cache the span length for performance reason.
9114            final HashMap<SuggestionSpan, Integer> spansLengths =
9115                    new HashMap<SuggestionSpan, Integer>();
9116
9117            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9118                int start = spannable.getSpanStart(suggestionSpan);
9119                int end = spannable.getSpanEnd(suggestionSpan);
9120                spansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9121            }
9122
9123            // The suggestions are sorted according to the lenght of the text that they cover
9124            // (shorter first)
9125            Arrays.sort(suggestionSpans, new Comparator<SuggestionSpan>() {
9126                public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9127                    return spansLengths.get(span1).intValue() - spansLengths.get(span2).intValue();
9128                }
9129            });
9130
9131            return suggestionSpans;
9132        }
9133
9134        @Override
9135        public void show() {
9136            if (!(mText instanceof Editable)) return;
9137            updateSuggestions();
9138
9139            super.show();
9140        }
9141
9142        @Override
9143        protected int getTextOffset() {
9144            return getSelectionStart();
9145        }
9146
9147        @Override
9148        protected int getVerticalLocalPosition(int line) {
9149            return mLayout.getLineBottom(line);
9150        }
9151
9152        @Override
9153        protected int clipVertically(int positionY) {
9154            final int height = mContentView.getMeasuredHeight();
9155            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9156            return Math.min(positionY, displayMetrics.heightPixels - height);
9157        }
9158
9159        @Override
9160        public void hide() {
9161            super.hide();
9162            if ((mText instanceof Editable) && mSuggestionRangeSpan != null) {
9163                ((Editable) mText).removeSpan(mSuggestionRangeSpan);
9164            }
9165        }
9166
9167        private void updateSuggestions() {
9168            Spannable spannable = (Spannable)TextView.this.mText;
9169            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9170
9171            final int nbSpans = suggestionSpans.length;
9172
9173            int totalNbSuggestions = 0;
9174            int spanUnionStart = mText.length();
9175            int spanUnionEnd = 0;
9176
9177            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9178                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9179                final int spanStart = spannable.getSpanStart(suggestionSpan);
9180                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9181                spanUnionStart = Math.min(spanStart, spanUnionStart);
9182                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9183
9184                String[] suggestions = suggestionSpan.getSuggestions();
9185                int nbSuggestions = suggestions.length;
9186                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9187                    TextView textView = (TextView) mContentView.getChildAt(
9188                            totalNbSuggestions);
9189                    textView.setText(suggestions[suggestionIndex]);
9190                    SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9191                    suggestionInfo.spanStart = spanStart;
9192                    suggestionInfo.spanEnd = spanEnd;
9193                    suggestionInfo.suggestionSpan = suggestionSpan;
9194                    suggestionInfo.suggestionIndex = suggestionIndex;
9195
9196                    totalNbSuggestions++;
9197                    if (totalNbSuggestions == MAX_NUMBER_SUGGESTIONS) {
9198                        // Also end outer for loop
9199                        spanIndex = nbSpans;
9200                        break;
9201                    }
9202                }
9203            }
9204
9205            if (totalNbSuggestions == 0) {
9206                // TODO Replace by final text, use a dedicated layout, add a fade out timer...
9207                TextView textView = (TextView) mContentView.getChildAt(0);
9208                textView.setText("No suggestions available");
9209                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9210                suggestionInfo.spanStart = NO_SUGGESTIONS;
9211                totalNbSuggestions++;
9212            } else {
9213                if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9214                ((Editable) mText).setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9215                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9216
9217                for (int i = 0; i < totalNbSuggestions; i++) {
9218                    final TextView textView = (TextView) mContentView.getChildAt(i);
9219                    highlightTextDifferences(textView, spanUnionStart, spanUnionEnd);
9220                }
9221            }
9222
9223            for (int i = 0; i < totalNbSuggestions; i++) {
9224                mContentView.getChildAt(i).setVisibility(VISIBLE);
9225            }
9226            for (int i = totalNbSuggestions; i < MAX_NUMBER_SUGGESTIONS; i++) {
9227                mContentView.getChildAt(i).setVisibility(GONE);
9228            }
9229        }
9230
9231        private long[] getWordLimits(CharSequence text) {
9232            // TODO locale for mSuggestionWordIterator
9233            if (mSuggestionWordIterator == null) mSuggestionWordIterator = new WordIterator();
9234            mSuggestionWordIterator.setCharSequence(text);
9235
9236            // First pass will simply count the number of words to be able to create an array
9237            // Not too expensive since previous break positions are cached by the BreakIterator
9238            int nbWords = 0;
9239            int position = mSuggestionWordIterator.following(0);
9240            while (position != BreakIterator.DONE) {
9241                nbWords++;
9242                position = mSuggestionWordIterator.following(position);
9243            }
9244
9245            int index = 0;
9246            long[] result = new long[nbWords];
9247
9248            position = mSuggestionWordIterator.following(0);
9249            while (position != BreakIterator.DONE) {
9250                int wordStart = mSuggestionWordIterator.getBeginning(position);
9251                result[index++] = packRangeInLong(wordStart, position);
9252                position = mSuggestionWordIterator.following(position);
9253            }
9254
9255            return result;
9256        }
9257
9258        private TextAppearanceSpan highlightSpan(int index) {
9259            final int length = mHighlightSpans.length;
9260            if (index < length) {
9261                return mHighlightSpans[index];
9262            }
9263
9264            // Assumes indexes are requested in sequence: simply append one more item
9265            TextAppearanceSpan[] newArray = new TextAppearanceSpan[length + 1];
9266            System.arraycopy(mHighlightSpans, 0, newArray, 0, length);
9267            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9268                    android.R.style.TextAppearance_SuggestionHighlight);
9269            newArray[length] = highlightSpan;
9270            mHighlightSpans = newArray;
9271            return highlightSpan;
9272        }
9273
9274        private void highlightTextDifferences(TextView textView, int unionStart, int unionEnd) {
9275            SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9276            final int spanStart = suggestionInfo.spanStart;
9277            final int spanEnd = suggestionInfo.spanEnd;
9278
9279            // Remove all text formating by converting to Strings
9280            final String text = textView.getText().toString();
9281            final String sourceText = mText.subSequence(spanStart, spanEnd).toString();
9282
9283            long[] sourceWordLimits = getWordLimits(sourceText);
9284            long[] wordLimits = getWordLimits(text);
9285
9286            SpannableStringBuilder ssb = new SpannableStringBuilder();
9287            // span [spanStart, spanEnd] is included in union [spanUnionStart, int spanUnionEnd]
9288            // The final result is made of 3 parts: the text before, between and after the span
9289            // This is the text before, provided for context
9290            ssb.append(mText.subSequence(unionStart, spanStart).toString());
9291
9292            // shift is used to offset spans positions wrt span's beginning
9293            final int shift = spanStart - unionStart;
9294            suggestionInfo.suggestionStart = shift;
9295            suggestionInfo.suggestionEnd = shift + text.length();
9296
9297            // This is the actual suggestion text, which will be highlighted by the following code
9298            ssb.append(text);
9299
9300            String[] words = new String[wordLimits.length];
9301            for (int i = 0; i < wordLimits.length; i++) {
9302                int wordStart = extractRangeStartFromLong(wordLimits[i]);
9303                int wordEnd = extractRangeEndFromLong(wordLimits[i]);
9304                words[i] = text.substring(wordStart, wordEnd);
9305            }
9306
9307            // Highlighted word algorithm is based on word matching between source and text
9308            // Matching words are found from left to right. TODO: change for RTL languages
9309            // Characters between matching words are highlighted
9310            int previousCommonWordIndex = -1;
9311            int nbHighlightSpans = 0;
9312            for (int i = 0; i < sourceWordLimits.length; i++) {
9313                int wordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9314                int wordEnd = extractRangeEndFromLong(sourceWordLimits[i]);
9315                String sourceWord = sourceText.substring(wordStart, wordEnd);
9316
9317                for (int j = previousCommonWordIndex + 1; j < words.length; j++) {
9318                    if (sourceWord.equals(words[j])) {
9319                        if (j != previousCommonWordIndex + 1) {
9320                            int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9321                                extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9322                            int lastDifferentPosition = extractRangeStartFromLong(wordLimits[j]);
9323                            ssb.setSpan(highlightSpan(nbHighlightSpans++),
9324                                    shift + firstDifferentPosition, shift + lastDifferentPosition,
9325                                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9326                        } else {
9327                            // Compare characters between words
9328                            int previousSourceWordEnd = i == 0 ? 0 :
9329                                extractRangeEndFromLong(sourceWordLimits[i - 1]);
9330                            int sourceWordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9331                            String sourceSpaces = sourceText.substring(previousSourceWordEnd,
9332                                    sourceWordStart);
9333
9334                            int previousWordEnd = j == 0 ? 0 :
9335                                extractRangeEndFromLong(wordLimits[j - 1]);
9336                            int currentWordStart = extractRangeStartFromLong(wordLimits[j]);
9337                            String textSpaces = text.substring(previousWordEnd, currentWordStart);
9338
9339                            if (!sourceSpaces.equals(textSpaces)) {
9340                                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9341                                        shift + previousWordEnd, shift + currentWordStart,
9342                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9343                            }
9344                        }
9345                        previousCommonWordIndex = j;
9346                        break;
9347                    }
9348                }
9349            }
9350
9351            // Finally, compare ends of Strings
9352            if (previousCommonWordIndex < words.length - 1) {
9353                int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9354                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9355                int lastDifferentPosition = textView.length();
9356                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9357                        shift + firstDifferentPosition, shift + lastDifferentPosition,
9358                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9359            } else {
9360                int lastSourceWordEnd = sourceWordLimits.length == 0 ? 0 :
9361                    extractRangeEndFromLong(sourceWordLimits[sourceWordLimits.length - 1]);
9362                String sourceSpaces = sourceText.substring(lastSourceWordEnd, sourceText.length());
9363
9364                int lastCommonTextWordEnd = previousCommonWordIndex < 0 ? 0 :
9365                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9366                String textSpaces = text.substring(lastCommonTextWordEnd, textView.length());
9367
9368                if (!sourceSpaces.equals(textSpaces) && textSpaces.length() > 0) {
9369                    ssb.setSpan(highlightSpan(nbHighlightSpans++),
9370                            shift + lastCommonTextWordEnd, shift + textView.length(),
9371                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9372                }
9373            }
9374
9375            // Final part, text after the current suggestion range.
9376            ssb.append(mText.subSequence(spanEnd, unionEnd).toString());
9377            textView.setText(ssb);
9378        }
9379
9380        @Override
9381        public void onClick(View view) {
9382            if (view instanceof TextView) {
9383                TextView textView = (TextView) view;
9384                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9385                final int spanStart = suggestionInfo.spanStart;
9386                final int spanEnd = suggestionInfo.spanEnd;
9387                if (spanStart != NO_SUGGESTIONS) {
9388                    // SuggestionSpans are removed by replace: save them before
9389                    Editable editable = ((Editable) mText);
9390                    SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9391                            SuggestionSpan.class);
9392                    final int length = suggestionSpans.length;
9393                    int[] suggestionSpansStarts = new int[length];
9394                    int[] suggestionSpansEnds = new int[length];
9395                    int[] suggestionSpansFlags = new int[length];
9396                    for (int i = 0; i < length; i++) {
9397                        final SuggestionSpan suggestionSpan = suggestionSpans[i];
9398                        suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9399                        suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9400                        suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9401                    }
9402
9403                    final int suggestionStart = suggestionInfo.suggestionStart;
9404                    final int suggestionEnd = suggestionInfo.suggestionEnd;
9405                    final String suggestion = textView.getText().subSequence(
9406                            suggestionStart, suggestionEnd).toString();
9407                    final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9408                    ((Editable) mText).replace(spanStart, spanEnd, suggestion);
9409
9410                    // Notify source IME of the suggestion pick. Do this before swaping texts.
9411                    if (!TextUtils.isEmpty(
9412                            suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9413                        InputMethodManager imm = InputMethodManager.peekInstance();
9414                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9415                                suggestionInfo.suggestionIndex);
9416                    }
9417
9418                    // Swap text content between actual text and Suggestion span
9419                    String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9420                    suggestions[suggestionInfo.suggestionIndex] = originalText;
9421
9422                    // Restore previous SuggestionSpans
9423                    final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9424                    for (int i = 0; i < length; i++) {
9425                        // Only spans that include the modified region make sense after replacement
9426                        // Spans partially included in the replaced region are removed, there is no
9427                        // way to assign them a valid range after replacement
9428                        if (suggestionSpansStarts[i] <= spanStart &&
9429                                suggestionSpansEnds[i] >= spanEnd) {
9430                            editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9431                                    suggestionSpansEnds[i] + lengthDifference,
9432                                    suggestionSpansFlags[i]);
9433                        }
9434                    }
9435                }
9436            }
9437            hide();
9438        }
9439    }
9440
9441    void showSuggestions() {
9442        if (!isSuggestionsEnabled() || !isTextEditable()) return;
9443
9444        if (mSuggestionsPopupWindow == null) {
9445            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9446        }
9447        hideControllers();
9448        mSuggestionsPopupWindow.show();
9449    }
9450
9451    void hideSuggestions() {
9452        if (mSuggestionsPopupWindow != null) {
9453            mSuggestionsPopupWindow.hide();
9454        }
9455    }
9456
9457    boolean areSuggestionsShown() {
9458        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
9459    }
9460
9461    /**
9462     * Some parts of the text can have alternate suggestion text attached. This is typically done by
9463     * the IME by adding {@link SuggestionSpan}s to the text.
9464     *
9465     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9466     * user double taps on these parts of the text. No suggestions are displayed when this value is
9467     * false. Use {@link #setSuggestionsEnabled(boolean)} to change this value.
9468     *
9469     * Note that suggestions are only enabled for a subset of input types. In addition to setting
9470     * this flag to <code>true</code> using {@link #setSuggestionsEnabled(boolean)} or the
9471     * <code>android:suggestionsEnabled</code> xml attribute, this method will return
9472     * <code>true</code> only if the class of your input type is {@link InputType#TYPE_CLASS_TEXT}.
9473     * In addition, the type variation must also be one of
9474     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
9475     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
9476     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
9477     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
9478     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
9479     *
9480     * @return true if the suggestions popup window is enabled.
9481     *
9482     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9483     */
9484    public boolean isSuggestionsEnabled() {
9485        if (!mSuggestionsEnabled) return false;
9486        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
9487        final int variation =
9488                mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
9489        if (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
9490                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
9491                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
9492                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
9493                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT) return true;
9494
9495        return false;
9496    }
9497
9498    /**
9499     * Enables or disables the suggestion popup. See {@link #isSuggestionsEnabled()}.
9500     *
9501     * @param enabled Whether or not suggestions are enabled.
9502     *
9503     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9504     */
9505    public void setSuggestionsEnabled(boolean enabled) {
9506        mSuggestionsEnabled = enabled;
9507    }
9508
9509    /**
9510     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9511     * selection is initiated in this View.
9512     *
9513     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
9514     * Paste actions, depending on what this View supports.
9515     *
9516     * A custom implementation can add new entries in the default menu in its
9517     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
9518     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
9519     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
9520     * or {@link android.R.id#paste} ids as parameters.
9521     *
9522     * Returning false from
9523     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
9524     * the action mode from being started.
9525     *
9526     * Action click events should be handled by the custom implementation of
9527     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
9528     *
9529     * Note that text selection mode is not started when a TextView receives focus and the
9530     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9531     * that case, to allow for quick replacement.
9532     */
9533    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9534        mCustomSelectionActionModeCallback = actionModeCallback;
9535    }
9536
9537    /**
9538     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9539     *
9540     * @return The current custom selection callback.
9541     */
9542    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9543        return mCustomSelectionActionModeCallback;
9544    }
9545
9546    /**
9547     *
9548     * @return true if the selection mode was actually started.
9549     */
9550    private boolean startSelectionActionMode() {
9551        if (mSelectionActionMode != null) {
9552            // Selection action mode is already started
9553            return false;
9554        }
9555
9556        if (!canSelectText() || !requestFocus()) {
9557            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
9558            return false;
9559        }
9560
9561        if (!hasSelection()) {
9562            // There may already be a selection on device rotation
9563            boolean currentWordSelected = selectCurrentWord();
9564            if (!currentWordSelected) {
9565                // No word found under cursor or text selection not permitted.
9566                return false;
9567            }
9568        }
9569
9570        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
9571        mSelectionActionMode = startActionMode(actionModeCallback);
9572        final boolean selectionStarted = mSelectionActionMode != null;
9573
9574        if (selectionStarted && !mTextIsSelectable) {
9575            // Show the IME to be able to replace text, except when selecting non editable text.
9576            final InputMethodManager imm = InputMethodManager.peekInstance();
9577            if (imm != null) imm.showSoftInput(this, 0, null);
9578        }
9579
9580        return selectionStarted;
9581    }
9582
9583    private void stopSelectionActionMode() {
9584        if (mSelectionActionMode != null) {
9585            // This will hide the mSelectionModifierCursorController
9586            mSelectionActionMode.finish();
9587        }
9588    }
9589
9590    /**
9591     * Paste clipboard content between min and max positions.
9592     */
9593    private void paste(int min, int max) {
9594        ClipboardManager clipboard =
9595            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9596        ClipData clip = clipboard.getPrimaryClip();
9597        if (clip != null) {
9598            boolean didFirst = false;
9599            for (int i=0; i<clip.getItemCount(); i++) {
9600                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
9601                if (paste != null) {
9602                    if (!didFirst) {
9603                        long minMax = prepareSpacesAroundPaste(min, max, paste);
9604                        min = extractRangeStartFromLong(minMax);
9605                        max = extractRangeEndFromLong(minMax);
9606                        Selection.setSelection((Spannable) mText, max);
9607                        ((Editable) mText).replace(min, max, paste);
9608                        didFirst = true;
9609                    } else {
9610                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9611                        ((Editable) mText).insert(getSelectionEnd(), paste);
9612                    }
9613                }
9614            }
9615            stopSelectionActionMode();
9616            sLastCutOrCopyTime = 0;
9617        }
9618    }
9619
9620    private void setPrimaryClip(ClipData clip) {
9621        ClipboardManager clipboard = (ClipboardManager) getContext().
9622                getSystemService(Context.CLIPBOARD_SERVICE);
9623        clipboard.setPrimaryClip(clip);
9624        sLastCutOrCopyTime = SystemClock.uptimeMillis();
9625    }
9626
9627    /**
9628     * An ActionMode Callback class that is used to provide actions while in text selection mode.
9629     *
9630     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
9631     * on which of these this TextView supports.
9632     */
9633    private class SelectionActionModeCallback implements ActionMode.Callback {
9634
9635        @Override
9636        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
9637            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
9638
9639            boolean allowText = getContext().getResources().getBoolean(
9640                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
9641
9642            mode.setTitle(allowText ?
9643                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
9644            mode.setSubtitle(null);
9645
9646            int selectAllIconId = 0; // No icon by default
9647            if (!allowText) {
9648                // Provide an icon, text will not be displayed on smaller screens.
9649                selectAllIconId = styledAttributes.getResourceId(
9650                        R.styleable.Theme_actionModeSelectAllDrawable, 0);
9651            }
9652
9653            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
9654                    setIcon(selectAllIconId).
9655                    setAlphabeticShortcut('a').
9656                    setShowAsAction(
9657                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9658
9659            if (canCut()) {
9660                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
9661                    setIcon(styledAttributes.getResourceId(
9662                            R.styleable.Theme_actionModeCutDrawable, 0)).
9663                    setAlphabeticShortcut('x').
9664                    setShowAsAction(
9665                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9666            }
9667
9668            if (canCopy()) {
9669                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
9670                    setIcon(styledAttributes.getResourceId(
9671                            R.styleable.Theme_actionModeCopyDrawable, 0)).
9672                    setAlphabeticShortcut('c').
9673                    setShowAsAction(
9674                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9675            }
9676
9677            if (canPaste()) {
9678                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
9679                        setIcon(styledAttributes.getResourceId(
9680                                R.styleable.Theme_actionModePasteDrawable, 0)).
9681                        setAlphabeticShortcut('v').
9682                        setShowAsAction(
9683                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9684            }
9685
9686            styledAttributes.recycle();
9687
9688            if (mCustomSelectionActionModeCallback != null) {
9689                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
9690                    // The custom mode can choose to cancel the action mode
9691                    return false;
9692                }
9693            }
9694
9695            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
9696                getSelectionController().show();
9697                return true;
9698            } else {
9699                return false;
9700            }
9701        }
9702
9703        @Override
9704        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
9705            if (mCustomSelectionActionModeCallback != null) {
9706                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
9707            }
9708            return true;
9709        }
9710
9711        @Override
9712        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
9713            if (mCustomSelectionActionModeCallback != null &&
9714                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
9715                return true;
9716            }
9717            return onTextContextMenuItem(item.getItemId());
9718        }
9719
9720        @Override
9721        public void onDestroyActionMode(ActionMode mode) {
9722            if (mCustomSelectionActionModeCallback != null) {
9723                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
9724            }
9725            Selection.setSelection((Spannable) mText, getSelectionEnd());
9726
9727            if (mSelectionModifierCursorController != null) {
9728                mSelectionModifierCursorController.hide();
9729            }
9730
9731            mSelectionActionMode = null;
9732        }
9733    }
9734
9735    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
9736        private static final int POPUP_TEXT_LAYOUT =
9737                com.android.internal.R.layout.text_edit_action_popup_text;
9738        private TextView mPasteTextView;
9739        private TextView mReplaceTextView;
9740
9741        @Override
9742        protected void createPopupWindow() {
9743            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9744                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9745            mPopupWindow.setClippingEnabled(true);
9746        }
9747
9748        @Override
9749        protected void initContentView() {
9750            mContentView.setOrientation(LinearLayout.HORIZONTAL);
9751            mContentView.setBackgroundResource(
9752                    com.android.internal.R.drawable.text_edit_side_paste_window);
9753
9754            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9755                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9756
9757            LayoutParams wrapContent = new LayoutParams(
9758                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
9759
9760            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9761            mPasteTextView.setLayoutParams(wrapContent);
9762            mContentView.addView(mPasteTextView);
9763            mPasteTextView.setText(com.android.internal.R.string.paste);
9764            mPasteTextView.setOnClickListener(this);
9765
9766            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9767            mReplaceTextView.setLayoutParams(wrapContent);
9768            mContentView.addView(mReplaceTextView);
9769            mReplaceTextView.setText(com.android.internal.R.string.replace);
9770            mReplaceTextView.setOnClickListener(this);
9771        }
9772
9773        @Override
9774        public void show() {
9775            boolean canPaste = canPaste();
9776            boolean suggestionsEnabled = isSuggestionsEnabled();
9777            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
9778            mReplaceTextView.setVisibility(suggestionsEnabled ? View.VISIBLE : View.GONE);
9779
9780            if (!canPaste && !suggestionsEnabled) return;
9781
9782            super.show();
9783        }
9784
9785        @Override
9786        public void onClick(View view) {
9787            if (view == mPasteTextView && canPaste()) {
9788                onTextContextMenuItem(ID_PASTE);
9789                hide();
9790            } else if (view == mReplaceTextView) {
9791                showSuggestions();
9792            }
9793        }
9794
9795        @Override
9796        protected int getTextOffset() {
9797            return (getSelectionStart() + getSelectionEnd()) / 2;
9798        }
9799
9800        @Override
9801        protected int getVerticalLocalPosition(int line) {
9802            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
9803        }
9804
9805        @Override
9806        protected int clipVertically(int positionY) {
9807            if (positionY < 0) {
9808                final int offset = getTextOffset();
9809                final int line = mLayout.getLineForOffset(offset);
9810                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
9811                positionY += mContentView.getMeasuredHeight();
9812
9813                // Assumes insertion and selection handles share the same height
9814                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
9815                positionY += handle.getIntrinsicHeight();
9816            }
9817
9818            return positionY;
9819        }
9820    }
9821
9822    private abstract class HandleView extends View implements TextViewPositionListener {
9823        protected Drawable mDrawable;
9824        private final PopupWindow mContainer;
9825        // Position with respect to the parent TextView
9826        private int mPositionX, mPositionY;
9827        private boolean mIsDragging;
9828        // Offset from touch position to mPosition
9829        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
9830        protected int mHotspotX;
9831        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
9832        private float mTouchOffsetY;
9833        // Where the touch position should be on the handle to ensure a maximum cursor visibility
9834        private float mIdealVerticalOffset;
9835        // Parent's (TextView) previous position in window
9836        private int mLastParentX, mLastParentY;
9837        // Transient action popup window for Paste and Replace actions
9838        protected ActionPopupWindow mActionPopupWindow;
9839        // Previous text character offset
9840        private int mPreviousOffset = -1;
9841        // Previous text character offset
9842        private boolean mPositionHasChanged = true;
9843        // Used to delay the appearance of the action popup window
9844        private Runnable mActionPopupShower;
9845
9846        public HandleView() {
9847            super(TextView.this.mContext);
9848            mContainer = new PopupWindow(TextView.this.mContext, null,
9849                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9850            mContainer.setSplitTouchEnabled(true);
9851            mContainer.setClippingEnabled(false);
9852            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9853            mContainer.setContentView(this);
9854
9855            initDrawable();
9856
9857            final int handleHeight = mDrawable.getIntrinsicHeight();
9858            mTouchOffsetY = -0.3f * handleHeight;
9859            mIdealVerticalOffset = 0.7f * handleHeight;
9860        }
9861
9862        protected abstract void initDrawable();
9863
9864        // Touch-up filter: number of previous positions remembered
9865        private static final int HISTORY_SIZE = 5;
9866        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
9867        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
9868        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
9869        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
9870        private int mPreviousOffsetIndex = 0;
9871        private int mNumberPreviousOffsets = 0;
9872
9873        private void startTouchUpFilter(int offset) {
9874            mNumberPreviousOffsets = 0;
9875            addPositionToTouchUpFilter(offset);
9876        }
9877
9878        private void addPositionToTouchUpFilter(int offset) {
9879            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
9880            mPreviousOffsets[mPreviousOffsetIndex] = offset;
9881            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
9882            mNumberPreviousOffsets++;
9883        }
9884
9885        private void filterOnTouchUp() {
9886            final long now = SystemClock.uptimeMillis();
9887            int i = 0;
9888            int index = mPreviousOffsetIndex;
9889            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
9890            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
9891                i++;
9892                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
9893            }
9894
9895            if (i > 0 && i < iMax &&
9896                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
9897                positionAtCursorOffset(mPreviousOffsets[index]);
9898            }
9899        }
9900
9901        public boolean offsetHasBeenChanged() {
9902            return mNumberPreviousOffsets > 1;
9903        }
9904
9905        @Override
9906        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
9907            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
9908        }
9909
9910        public void show() {
9911            if (isShowing()) return;
9912
9913            getPositionListener().addSubscriber(this, true);
9914
9915            // Make sure the offset is always considered new, even when focusing at same position
9916            mPreviousOffset = -1;
9917            positionAtCursorOffset(getCurrentCursorOffset());
9918
9919            hideActionPopupWindow();
9920        }
9921
9922        protected void dismiss() {
9923            mIsDragging = false;
9924            mContainer.dismiss();
9925            onDetached();
9926        }
9927
9928        public void hide() {
9929            dismiss();
9930
9931            TextView.this.getPositionListener().removeSubscriber(this);
9932        }
9933
9934        void showActionPopupWindow(int delay) {
9935            if (mActionPopupWindow == null) {
9936                mActionPopupWindow = new ActionPopupWindow();
9937            }
9938            if (mActionPopupShower == null) {
9939                mActionPopupShower = new Runnable() {
9940                    public void run() {
9941                        mActionPopupWindow.show();
9942                    }
9943                };
9944            } else {
9945                TextView.this.removeCallbacks(mActionPopupShower);
9946            }
9947            TextView.this.postDelayed(mActionPopupShower, delay);
9948        }
9949
9950        protected void hideActionPopupWindow() {
9951            if (mActionPopupShower != null) {
9952                TextView.this.removeCallbacks(mActionPopupShower);
9953            }
9954            if (mActionPopupWindow != null) {
9955                mActionPopupWindow.hide();
9956            }
9957        }
9958
9959        public boolean isShowing() {
9960            return mContainer.isShowing();
9961        }
9962
9963        private boolean isVisible() {
9964            // Always show a dragging handle.
9965            if (mIsDragging) {
9966                return true;
9967            }
9968
9969            if (isInBatchEditMode()) {
9970                return false;
9971            }
9972
9973            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
9974        }
9975
9976        public abstract int getCurrentCursorOffset();
9977
9978        public abstract void updateSelection(int offset);
9979
9980        public abstract void updatePosition(float x, float y);
9981
9982        protected void positionAtCursorOffset(int offset) {
9983            // A HandleView relies on the layout, which may be nulled by external methods
9984            if (mLayout == null) {
9985                // Will update controllers' state, hiding them and stopping selection mode if needed
9986                prepareCursorControllers();
9987                return;
9988            }
9989
9990            if (offset != mPreviousOffset) {
9991                updateSelection(offset);
9992                addPositionToTouchUpFilter(offset);
9993                final int line = mLayout.getLineForOffset(offset);
9994
9995                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
9996                mPositionY = mLayout.getLineBottom(line);
9997
9998                // Take TextView's padding into account.
9999                mPositionX += viewportToContentHorizontalOffset();
10000                mPositionY += viewportToContentVerticalOffset();
10001
10002                mPreviousOffset = offset;
10003                mPositionHasChanged = true;
10004            }
10005        }
10006
10007        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
10008            positionAtCursorOffset(getCurrentCursorOffset());
10009            if (modified || mPositionHasChanged) {
10010                if (mIsDragging) {
10011                    // Update touchToWindow offset in case of parent scrolling while dragging
10012                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10013                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10014                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10015                        mLastParentX = parentPositionX;
10016                        mLastParentY = parentPositionY;
10017                    }
10018
10019                    onHandleMoved();
10020                }
10021
10022                if (isVisible()) {
10023                    final int positionX = parentPositionX + mPositionX;
10024                    final int positionY = parentPositionY + mPositionY;
10025                    if (isShowing()) {
10026                        mContainer.update(positionX, positionY, -1, -1);
10027                    } else {
10028                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10029                                positionX, positionY);
10030                    }
10031                } else {
10032                    if (isShowing()) {
10033                        dismiss();
10034                    }
10035                }
10036
10037                mPositionHasChanged = false;
10038            }
10039        }
10040
10041        @Override
10042        protected void onDraw(Canvas c) {
10043            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10044            mDrawable.draw(c);
10045        }
10046
10047        @Override
10048        public boolean onTouchEvent(MotionEvent ev) {
10049            switch (ev.getActionMasked()) {
10050                case MotionEvent.ACTION_DOWN: {
10051                    startTouchUpFilter(getCurrentCursorOffset());
10052                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10053                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10054
10055                    final PositionListener positionListener = getPositionListener();
10056                    mLastParentX = positionListener.getPositionX();
10057                    mLastParentY = positionListener.getPositionY();
10058                    mIsDragging = true;
10059                    break;
10060                }
10061
10062                case MotionEvent.ACTION_MOVE: {
10063                    final float rawX = ev.getRawX();
10064                    final float rawY = ev.getRawY();
10065
10066                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10067                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10068                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10069                    float newVerticalOffset;
10070                    if (previousVerticalOffset < mIdealVerticalOffset) {
10071                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10072                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10073                    } else {
10074                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10075                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10076                    }
10077                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10078
10079                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10080                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10081
10082                    updatePosition(newPosX, newPosY);
10083                    break;
10084                }
10085
10086                case MotionEvent.ACTION_UP:
10087                    filterOnTouchUp();
10088                    mIsDragging = false;
10089                    break;
10090
10091                case MotionEvent.ACTION_CANCEL:
10092                    mIsDragging = false;
10093                    break;
10094            }
10095            return true;
10096        }
10097
10098        public boolean isDragging() {
10099            return mIsDragging;
10100        }
10101
10102        void onHandleMoved() {
10103            hideActionPopupWindow();
10104        }
10105
10106        public void onDetached() {
10107            hideActionPopupWindow();
10108        }
10109    }
10110
10111    private class InsertionHandleView extends HandleView {
10112        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10113        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10114
10115        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10116        private float mDownPositionX, mDownPositionY;
10117        private Runnable mHider;
10118
10119        @Override
10120        public void show() {
10121            super.show();
10122            hideAfterDelay();
10123        }
10124
10125        public void show(int delayBeforeShowActionPopup) {
10126            show();
10127
10128            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10129            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10130                delayBeforeShowActionPopup = 0;
10131            }
10132            showActionPopupWindow(delayBeforeShowActionPopup);
10133        }
10134
10135        private void hideAfterDelay() {
10136            removeHiderCallback();
10137            if (mHider == null) {
10138                mHider = new Runnable() {
10139                    public void run() {
10140                        hide();
10141                    }
10142                };
10143            }
10144            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10145        }
10146
10147        private void removeHiderCallback() {
10148            if (mHider != null) {
10149                TextView.this.removeCallbacks(mHider);
10150            }
10151        }
10152
10153        @Override
10154        protected void initDrawable() {
10155            if (mSelectHandleCenter == null) {
10156                mSelectHandleCenter = mContext.getResources().getDrawable(
10157                        mTextSelectHandleRes);
10158            }
10159            mDrawable = mSelectHandleCenter;
10160            mHotspotX = mDrawable.getIntrinsicWidth() / 2;
10161        }
10162
10163        @Override
10164        public boolean onTouchEvent(MotionEvent ev) {
10165            final boolean result = super.onTouchEvent(ev);
10166
10167            switch (ev.getActionMasked()) {
10168                case MotionEvent.ACTION_DOWN:
10169                    mDownPositionX = ev.getRawX();
10170                    mDownPositionY = ev.getRawY();
10171                    break;
10172
10173                case MotionEvent.ACTION_UP:
10174                    if (!offsetHasBeenChanged()) {
10175                        final float deltaX = mDownPositionX - ev.getRawX();
10176                        final float deltaY = mDownPositionY - ev.getRawY();
10177                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10178                        if (distanceSquared < mSquaredTouchSlopDistance) {
10179                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10180                                // Tapping on the handle dismisses the displayed action popup
10181                                mActionPopupWindow.hide();
10182                            } else {
10183                                show(0);
10184                            }
10185                        }
10186                    }
10187                    hideAfterDelay();
10188                    break;
10189
10190                case MotionEvent.ACTION_CANCEL:
10191                    hideAfterDelay();
10192                    break;
10193
10194                default:
10195                    break;
10196            }
10197
10198            return result;
10199        }
10200
10201        @Override
10202        public int getCurrentCursorOffset() {
10203            return TextView.this.getSelectionStart();
10204        }
10205
10206        @Override
10207        public void updateSelection(int offset) {
10208            Selection.setSelection((Spannable) mText, offset);
10209        }
10210
10211        @Override
10212        public void updatePosition(float x, float y) {
10213            positionAtCursorOffset(getOffsetForPosition(x, y));
10214        }
10215
10216        @Override
10217        void onHandleMoved() {
10218            super.onHandleMoved();
10219            removeHiderCallback();
10220        }
10221
10222        @Override
10223        public void onDetached() {
10224            super.onDetached();
10225            removeHiderCallback();
10226        }
10227    }
10228
10229    private class SelectionStartHandleView extends HandleView {
10230        @Override
10231        protected void initDrawable() {
10232            if (mSelectHandleLeft == null) {
10233                mSelectHandleLeft = mContext.getResources().getDrawable(
10234                        mTextSelectHandleLeftRes);
10235            }
10236            mDrawable = mSelectHandleLeft;
10237            mHotspotX = (mDrawable.getIntrinsicWidth() * 3) / 4;
10238        }
10239
10240        @Override
10241        public int getCurrentCursorOffset() {
10242            return TextView.this.getSelectionStart();
10243        }
10244
10245        @Override
10246        public void updateSelection(int offset) {
10247            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10248        }
10249
10250        @Override
10251        public void updatePosition(float x, float y) {
10252            final int selectionStart = getSelectionStart();
10253            final int selectionEnd = getSelectionEnd();
10254
10255            int offset = getOffsetForPosition(x, y);
10256
10257            // No need to redraw when the offset is unchanged
10258            if (offset == selectionStart) return;
10259            // Handles can not cross and selection is at least one character
10260            if (offset >= selectionEnd) offset = selectionEnd - 1;
10261
10262            positionAtCursorOffset(offset);
10263        }
10264
10265        public ActionPopupWindow getActionPopupWindow() {
10266            return mActionPopupWindow;
10267        }
10268    }
10269
10270    private class SelectionEndHandleView extends HandleView {
10271        @Override
10272        protected void initDrawable() {
10273            if (mSelectHandleRight == null) {
10274                mSelectHandleRight = mContext.getResources().getDrawable(
10275                        mTextSelectHandleRightRes);
10276            }
10277            mDrawable = mSelectHandleRight;
10278            mHotspotX = mDrawable.getIntrinsicWidth() / 4;
10279        }
10280
10281        @Override
10282        public int getCurrentCursorOffset() {
10283            return TextView.this.getSelectionEnd();
10284        }
10285
10286        @Override
10287        public void updateSelection(int offset) {
10288            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10289        }
10290
10291        @Override
10292        public void updatePosition(float x, float y) {
10293            final int selectionStart = getSelectionStart();
10294            final int selectionEnd = getSelectionEnd();
10295
10296            int offset = getOffsetForPosition(x, y);
10297
10298            // No need to redraw when the offset is unchanged
10299            if (offset == selectionEnd) return;
10300            // Handles can not cross and selection is at least one character
10301            if (offset <= selectionStart) offset = selectionStart + 1;
10302
10303            positionAtCursorOffset(offset);
10304        }
10305
10306        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10307            mActionPopupWindow = actionPopupWindow;
10308        }
10309    }
10310
10311    /**
10312     * A CursorController instance can be used to control a cursor in the text.
10313     * It is not used outside of {@link TextView}.
10314     * @hide
10315     */
10316    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10317        /**
10318         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10319         * See also {@link #hide()}.
10320         */
10321        public void show();
10322
10323        /**
10324         * Hide the cursor controller from screen.
10325         * See also {@link #show()}.
10326         */
10327        public void hide();
10328
10329        /**
10330         * Called when the view is detached from window. Perform house keeping task, such as
10331         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10332         * preventing the activity from being recycled.
10333         */
10334        public void onDetached();
10335    }
10336
10337    private class InsertionPointCursorController implements CursorController {
10338        private static final int DELAY_BEFORE_PASTE_ACTION = 1600;
10339
10340        private InsertionHandleView mHandle;
10341
10342        public void show() {
10343            getHandle().show(DELAY_BEFORE_PASTE_ACTION);
10344        }
10345
10346        public void showImmediately() {
10347            getHandle().show(0);
10348        }
10349
10350        public void hide() {
10351            if (mHandle != null) {
10352                mHandle.hide();
10353            }
10354        }
10355
10356        public void onTouchModeChanged(boolean isInTouchMode) {
10357            if (!isInTouchMode) {
10358                hide();
10359            }
10360        }
10361
10362        private InsertionHandleView getHandle() {
10363            if (mHandle == null) {
10364                mHandle = new InsertionHandleView();
10365            }
10366            return mHandle;
10367        }
10368
10369        @Override
10370        public void onDetached() {
10371            final ViewTreeObserver observer = getViewTreeObserver();
10372            observer.removeOnTouchModeChangeListener(this);
10373
10374            if (mHandle != null) mHandle.onDetached();
10375        }
10376    }
10377
10378    private class SelectionModifierCursorController implements CursorController {
10379        private static final int DELAY_BEFORE_REPLACE_ACTION = 1200;
10380        // The cursor controller handles, lazily created when shown.
10381        private SelectionStartHandleView mStartHandle;
10382        private SelectionEndHandleView mEndHandle;
10383        // The offsets of that last touch down event. Remembered to start selection there.
10384        private int mMinTouchOffset, mMaxTouchOffset;
10385
10386        // Double tap detection
10387        private long mPreviousTapUpTime = 0;
10388        private float mPreviousTapPositionX, mPreviousTapPositionY;
10389
10390        SelectionModifierCursorController() {
10391            resetTouchOffsets();
10392        }
10393
10394        public void show() {
10395            if (isInBatchEditMode()) {
10396                return;
10397            }
10398
10399            // Lazy object creation has to be done before updatePosition() is called.
10400            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
10401            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
10402
10403            mStartHandle.show();
10404            mEndHandle.show();
10405
10406            // Make sure both left and right handles share the same ActionPopupWindow (so that
10407            // moving any of the handles hides the action popup).
10408            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
10409            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
10410
10411            hideInsertionPointCursorController();
10412            hideSuggestions();
10413        }
10414
10415        public void hide() {
10416            if (mStartHandle != null) mStartHandle.hide();
10417            if (mEndHandle != null) mEndHandle.hide();
10418        }
10419
10420        public void onTouchEvent(MotionEvent event) {
10421            // This is done even when the View does not have focus, so that long presses can start
10422            // selection and tap can move cursor from this tap position.
10423            switch (event.getActionMasked()) {
10424                case MotionEvent.ACTION_DOWN:
10425                    final float x = event.getX();
10426                    final float y = event.getY();
10427
10428                    // Remember finger down position, to be able to start selection from there
10429                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
10430
10431                    // Double tap detection
10432                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
10433                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
10434                            isPositionOnText(x, y)) {
10435                        final float deltaX = x - mPreviousTapPositionX;
10436                        final float deltaY = y - mPreviousTapPositionY;
10437                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10438                        if (distanceSquared < mSquaredTouchSlopDistance) {
10439                            startSelectionActionMode();
10440                            mDiscardNextActionUp = true;
10441                        }
10442                    }
10443
10444                    mPreviousTapPositionX = x;
10445                    mPreviousTapPositionY = y;
10446                    break;
10447
10448                case MotionEvent.ACTION_POINTER_DOWN:
10449                case MotionEvent.ACTION_POINTER_UP:
10450                    // Handle multi-point gestures. Keep min and max offset positions.
10451                    // Only activated for devices that correctly handle multi-touch.
10452                    if (mContext.getPackageManager().hasSystemFeature(
10453                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
10454                        updateMinAndMaxOffsets(event);
10455                    }
10456                    break;
10457
10458                case MotionEvent.ACTION_UP:
10459                    mPreviousTapUpTime = SystemClock.uptimeMillis();
10460                    break;
10461            }
10462        }
10463
10464        /**
10465         * @param event
10466         */
10467        private void updateMinAndMaxOffsets(MotionEvent event) {
10468            int pointerCount = event.getPointerCount();
10469            for (int index = 0; index < pointerCount; index++) {
10470                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
10471                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
10472                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
10473            }
10474        }
10475
10476        public int getMinTouchOffset() {
10477            return mMinTouchOffset;
10478        }
10479
10480        public int getMaxTouchOffset() {
10481            return mMaxTouchOffset;
10482        }
10483
10484        public void resetTouchOffsets() {
10485            mMinTouchOffset = mMaxTouchOffset = -1;
10486        }
10487
10488        /**
10489         * @return true iff this controller is currently used to move the selection start.
10490         */
10491        public boolean isSelectionStartDragged() {
10492            return mStartHandle != null && mStartHandle.isDragging();
10493        }
10494
10495        public void onTouchModeChanged(boolean isInTouchMode) {
10496            if (!isInTouchMode) {
10497                hide();
10498            }
10499        }
10500
10501        @Override
10502        public void onDetached() {
10503            final ViewTreeObserver observer = getViewTreeObserver();
10504            observer.removeOnTouchModeChangeListener(this);
10505
10506            if (mStartHandle != null) mStartHandle.onDetached();
10507            if (mEndHandle != null) mEndHandle.onDetached();
10508        }
10509    }
10510
10511    private void hideInsertionPointCursorController() {
10512        // No need to create the controller to hide it.
10513        if (mInsertionPointCursorController != null) {
10514            mInsertionPointCursorController.hide();
10515        }
10516    }
10517
10518    /**
10519     * Hides the insertion controller and stops text selection mode, hiding the selection controller
10520     */
10521    private void hideControllers() {
10522        hideInsertionPointCursorController();
10523        stopSelectionActionMode();
10524        hideSuggestions();
10525    }
10526
10527    /**
10528     * Get the character offset closest to the specified absolute position. A typical use case is to
10529     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
10530     *
10531     * @param x The horizontal absolute position of a point on screen
10532     * @param y The vertical absolute position of a point on screen
10533     * @return the character offset for the character whose position is closest to the specified
10534     *  position. Returns -1 if there is no layout.
10535     */
10536    public int getOffsetForPosition(float x, float y) {
10537        if (getLayout() == null) return -1;
10538        final int line = getLineAtCoordinate(y);
10539        final int offset = getOffsetAtCoordinate(line, x);
10540        return offset;
10541    }
10542
10543    private float convertToLocalHorizontalCoordinate(float x) {
10544        x -= getTotalPaddingLeft();
10545        // Clamp the position to inside of the view.
10546        x = Math.max(0.0f, x);
10547        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
10548        x += getScrollX();
10549        return x;
10550    }
10551
10552    private int getLineAtCoordinate(float y) {
10553        y -= getTotalPaddingTop();
10554        // Clamp the position to inside of the view.
10555        y = Math.max(0.0f, y);
10556        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
10557        y += getScrollY();
10558        return getLayout().getLineForVertical((int) y);
10559    }
10560
10561    private int getOffsetAtCoordinate(int line, float x) {
10562        x = convertToLocalHorizontalCoordinate(x);
10563        return getLayout().getOffsetForHorizontal(line, x);
10564    }
10565
10566    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
10567     * in the view. Returns false when the position is in the empty space of left/right of text.
10568     */
10569    private boolean isPositionOnText(float x, float y) {
10570        if (getLayout() == null) return false;
10571
10572        final int line = getLineAtCoordinate(y);
10573        x = convertToLocalHorizontalCoordinate(x);
10574
10575        if (x < getLayout().getLineLeft(line)) return false;
10576        if (x > getLayout().getLineRight(line)) return false;
10577        return true;
10578    }
10579
10580    @Override
10581    public boolean onDragEvent(DragEvent event) {
10582        switch (event.getAction()) {
10583            case DragEvent.ACTION_DRAG_STARTED:
10584                return hasInsertionController();
10585
10586            case DragEvent.ACTION_DRAG_ENTERED:
10587                TextView.this.requestFocus();
10588                return true;
10589
10590            case DragEvent.ACTION_DRAG_LOCATION:
10591                final int offset = getOffsetForPosition(event.getX(), event.getY());
10592                Selection.setSelection((Spannable)mText, offset);
10593                return true;
10594
10595            case DragEvent.ACTION_DROP:
10596                onDrop(event);
10597                return true;
10598
10599            case DragEvent.ACTION_DRAG_ENDED:
10600            case DragEvent.ACTION_DRAG_EXITED:
10601            default:
10602                return true;
10603        }
10604    }
10605
10606    private void onDrop(DragEvent event) {
10607        StringBuilder content = new StringBuilder("");
10608        ClipData clipData = event.getClipData();
10609        final int itemCount = clipData.getItemCount();
10610        for (int i=0; i < itemCount; i++) {
10611            Item item = clipData.getItemAt(i);
10612            content.append(item.coerceToText(TextView.this.mContext));
10613        }
10614
10615        final int offset = getOffsetForPosition(event.getX(), event.getY());
10616
10617        Object localState = event.getLocalState();
10618        DragLocalState dragLocalState = null;
10619        if (localState instanceof DragLocalState) {
10620            dragLocalState = (DragLocalState) localState;
10621        }
10622        boolean dragDropIntoItself = dragLocalState != null &&
10623                dragLocalState.sourceTextView == this;
10624
10625        if (dragDropIntoItself) {
10626            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
10627                // A drop inside the original selection discards the drop.
10628                return;
10629            }
10630        }
10631
10632        final int originalLength = mText.length();
10633        long minMax = prepareSpacesAroundPaste(offset, offset, content);
10634        int min = extractRangeStartFromLong(minMax);
10635        int max = extractRangeEndFromLong(minMax);
10636
10637        Selection.setSelection((Spannable) mText, max);
10638        ((Editable) mText).replace(min, max, content);
10639
10640        if (dragDropIntoItself) {
10641            int dragSourceStart = dragLocalState.start;
10642            int dragSourceEnd = dragLocalState.end;
10643            if (max <= dragSourceStart) {
10644                // Inserting text before selection has shifted positions
10645                final int shift = mText.length() - originalLength;
10646                dragSourceStart += shift;
10647                dragSourceEnd += shift;
10648            }
10649
10650            // Delete original selection
10651            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
10652
10653            // Make sure we do not leave two adjacent spaces.
10654            if ((dragSourceStart == 0 ||
10655                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
10656                    (dragSourceStart == mText.length() ||
10657                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
10658                final int pos = dragSourceStart == mText.length() ?
10659                        dragSourceStart - 1 : dragSourceStart;
10660                ((Editable) mText).delete(pos, pos + 1);
10661            }
10662        }
10663    }
10664
10665    /**
10666     * @return True if this view supports insertion handles.
10667     */
10668    boolean hasInsertionController() {
10669        return mInsertionControllerEnabled;
10670    }
10671
10672    /**
10673     * @return True if this view supports selection handles.
10674     */
10675    boolean hasSelectionController() {
10676        return mSelectionControllerEnabled;
10677    }
10678
10679    InsertionPointCursorController getInsertionController() {
10680        if (!mInsertionControllerEnabled) {
10681            return null;
10682        }
10683
10684        if (mInsertionPointCursorController == null) {
10685            mInsertionPointCursorController = new InsertionPointCursorController();
10686
10687            final ViewTreeObserver observer = getViewTreeObserver();
10688            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
10689        }
10690
10691        return mInsertionPointCursorController;
10692    }
10693
10694    SelectionModifierCursorController getSelectionController() {
10695        if (!mSelectionControllerEnabled) {
10696            return null;
10697        }
10698
10699        if (mSelectionModifierCursorController == null) {
10700            mSelectionModifierCursorController = new SelectionModifierCursorController();
10701
10702            final ViewTreeObserver observer = getViewTreeObserver();
10703            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
10704        }
10705
10706        return mSelectionModifierCursorController;
10707    }
10708
10709    boolean isInBatchEditMode() {
10710        final InputMethodState ims = mInputMethodState;
10711        if (ims != null) {
10712            return ims.mBatchEditNesting > 0;
10713        }
10714        return mInBatchEditControllers;
10715    }
10716
10717    private class TextViewDirectionHeuristic extends TextDirectionHeuristicImpl {
10718        private TextViewDirectionHeuristic(TextDirectionAlgorithm algorithm) {
10719            super(algorithm);
10720        }
10721        @Override
10722        protected boolean defaultIsRtl() {
10723            return getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL;
10724        }
10725    }
10726
10727    /**
10728     * Resolve the text direction.
10729     *
10730     * Text direction of paragraphs in a TextView is determined using a heuristic. If the correct
10731     * text direction cannot be determined by the heuristic, the view's resolved layout direction
10732     * determines the direction.
10733     *
10734     * This heuristic and result is applied individually to each paragraph in a TextView, based on
10735     * the text and style content of that paragraph. Paragraph text styles can also be used to force
10736     * a particular direction.
10737     */
10738    @Override
10739    protected void resolveTextDirection() {
10740        super.resolveTextDirection();
10741
10742        int textDir = getResolvedTextDirection();
10743        switch (textDir) {
10744            default:
10745            case TEXT_DIRECTION_FIRST_STRONG:
10746                mTextDir = new TextViewDirectionHeuristic(FirstStrong.INSTANCE);
10747                break;
10748            case TEXT_DIRECTION_ANY_RTL:
10749                mTextDir = new TextViewDirectionHeuristic(AnyStrong.INSTANCE_RTL);
10750                break;
10751            case TEXT_DIRECTION_CHAR_COUNT:
10752                mTextDir = new TextViewDirectionHeuristic(CharCount.INSTANCE_DEFAULT);
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    /**
10765     * Subclasses will need to override this method to implement their own way of resolving
10766     * drawables depending on the layout direction.
10767     *
10768     * A call to the super method will be required from the subclasses implementation.
10769     *
10770     */
10771    protected void resolveDrawables() {
10772        // No need to resolve twice
10773        if (mResolvedDrawables) {
10774            return;
10775        }
10776        // No drawable to resolve
10777        if (mDrawables == null) {
10778            return;
10779        }
10780        // No relative drawable to resolve
10781        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
10782            mResolvedDrawables = true;
10783            return;
10784        }
10785
10786        Drawables dr = mDrawables;
10787        switch(getResolvedLayoutDirection()) {
10788            case LAYOUT_DIRECTION_RTL:
10789                if (dr.mDrawableStart != null) {
10790                    dr.mDrawableRight = dr.mDrawableStart;
10791
10792                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
10793                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
10794                }
10795                if (dr.mDrawableEnd != null) {
10796                    dr.mDrawableLeft = dr.mDrawableEnd;
10797
10798                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
10799                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
10800                }
10801                break;
10802
10803            case LAYOUT_DIRECTION_LTR:
10804            default:
10805                if (dr.mDrawableStart != null) {
10806                    dr.mDrawableLeft = dr.mDrawableStart;
10807
10808                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
10809                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
10810                }
10811                if (dr.mDrawableEnd != null) {
10812                    dr.mDrawableRight = dr.mDrawableEnd;
10813
10814                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
10815                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
10816                }
10817                break;
10818        }
10819        mResolvedDrawables = true;
10820    }
10821
10822    protected void resetResolvedDrawables() {
10823        mResolvedDrawables = false;
10824    }
10825
10826    @ViewDebug.ExportedProperty(category = "text")
10827    private CharSequence            mText;
10828    private CharSequence            mTransformed;
10829    private BufferType              mBufferType = BufferType.NORMAL;
10830
10831    private int                     mInputType = EditorInfo.TYPE_NULL;
10832    private CharSequence            mHint;
10833    private Layout                  mHintLayout;
10834
10835    private KeyListener             mInput;
10836
10837    private MovementMethod          mMovement;
10838    private TransformationMethod    mTransformation;
10839    private boolean                 mAllowTransformationLengthChange;
10840    private ChangeWatcher           mChangeWatcher;
10841
10842    private ArrayList<TextWatcher>  mListeners = null;
10843
10844    // display attributes
10845    private final TextPaint         mTextPaint;
10846    private boolean                 mUserSetTextScaleX;
10847    private final Paint             mHighlightPaint;
10848    private int                     mHighlightColor = 0xCC475925;
10849    /**
10850     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
10851     * this field being protected. Will be restored as private when lineHeight
10852     * feature request 3215097 is implemented
10853     * @hide
10854     */
10855    protected Layout                mLayout;
10856
10857    private long                    mShowCursor;
10858    private Blink                   mBlink;
10859    private boolean                 mCursorVisible = true;
10860
10861    // Cursor Controllers.
10862    private InsertionPointCursorController mInsertionPointCursorController;
10863    private SelectionModifierCursorController mSelectionModifierCursorController;
10864    private ActionMode              mSelectionActionMode;
10865    private boolean                 mInsertionControllerEnabled;
10866    private boolean                 mSelectionControllerEnabled;
10867    private boolean                 mInBatchEditControllers;
10868
10869    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
10870    // select from the current cursor position. Otherwise, select from long pressed position.
10871    private boolean                 mDPadCenterIsDown = false;
10872    private boolean                 mEnterKeyIsDown = false;
10873    private boolean                 mContextMenuTriggeredByKey = false;
10874
10875    private boolean                 mSelectAllOnFocus = false;
10876
10877    private int                     mGravity = Gravity.TOP | Gravity.START;
10878    private boolean                 mHorizontallyScrolling;
10879
10880    private int                     mAutoLinkMask;
10881    private boolean                 mLinksClickable = true;
10882
10883    private float                   mSpacingMult = 1;
10884    private float                   mSpacingAdd = 0;
10885    private boolean                 mTextIsSelectable = false;
10886
10887    private static final int        LINES = 1;
10888    private static final int        EMS = LINES;
10889    private static final int        PIXELS = 2;
10890
10891    private int                     mMaximum = Integer.MAX_VALUE;
10892    private int                     mMaxMode = LINES;
10893    private int                     mMinimum = 0;
10894    private int                     mMinMode = LINES;
10895
10896    private int                     mMaxWidth = Integer.MAX_VALUE;
10897    private int                     mMaxWidthMode = PIXELS;
10898    private int                     mMinWidth = 0;
10899    private int                     mMinWidthMode = PIXELS;
10900
10901    private boolean                 mSingleLine;
10902    private int                     mDesiredHeightAtMeasure = -1;
10903    private boolean                 mIncludePad = true;
10904
10905    // tmp primitives, so we don't alloc them on each draw
10906    private Path                    mHighlightPath;
10907    private boolean                 mHighlightPathBogus = true;
10908    private static final RectF      sTempRect = new RectF();
10909
10910    // XXX should be much larger
10911    private static final int        VERY_WIDE = 16384;
10912
10913    private static final int        BLINK = 500;
10914
10915    private static final int ANIMATED_SCROLL_GAP = 250;
10916    private long mLastScroll;
10917    private Scroller mScroller = null;
10918
10919    private BoringLayout.Metrics mBoring;
10920    private BoringLayout.Metrics mHintBoring;
10921
10922    private BoringLayout mSavedLayout, mSavedHintLayout;
10923
10924    private TextDirectionHeuristic mTextDir = null;
10925
10926    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
10927    private InputFilter[] mFilters = NO_FILTERS;
10928    private static final Spanned EMPTY_SPANNED = new SpannedString("");
10929    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
10930    // System wide time for last cut or copy action.
10931    private static long sLastCutOrCopyTime;
10932    // Used to highlight a word when it is corrected by the IME
10933    private CorrectionHighlighter mCorrectionHighlighter;
10934    // New state used to change background based on whether this TextView is multiline.
10935    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
10936}
10937