TextView.java revision 248b112ddaea42eb7c9330407aee1c9d836db7fd 
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        mHorizontallyScrolling = whether;
2498
2499        if (mLayout != null) {
2500            nullLayouts();
2501            requestLayout();
2502            invalidate();
2503        }
2504    }
2505
2506    /**
2507     * Makes the TextView at least this many lines tall.
2508     *
2509     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2510     * set this value to 1.
2511     *
2512     * @attr ref android.R.styleable#TextView_minLines
2513     */
2514    @android.view.RemotableViewMethod
2515    public void setMinLines(int minlines) {
2516        mMinimum = minlines;
2517        mMinMode = LINES;
2518
2519        requestLayout();
2520        invalidate();
2521    }
2522
2523    /**
2524     * Makes the TextView at least this many pixels tall.
2525     *
2526     * Setting this value overrides any other (minimum) number of lines setting.
2527     *
2528     * @attr ref android.R.styleable#TextView_minHeight
2529     */
2530    @android.view.RemotableViewMethod
2531    public void setMinHeight(int minHeight) {
2532        mMinimum = minHeight;
2533        mMinMode = PIXELS;
2534
2535        requestLayout();
2536        invalidate();
2537    }
2538
2539    /**
2540     * Makes the TextView at most this many lines tall.
2541     *
2542     * Setting this value overrides any other (maximum) height setting.
2543     *
2544     * @attr ref android.R.styleable#TextView_maxLines
2545     */
2546    @android.view.RemotableViewMethod
2547    public void setMaxLines(int maxlines) {
2548        mMaximum = maxlines;
2549        mMaxMode = LINES;
2550
2551        requestLayout();
2552        invalidate();
2553    }
2554
2555    /**
2556     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2557     * {@link #setMaxLines(int)} method.
2558     *
2559     * Setting this value overrides any other (maximum) number of lines setting.
2560     *
2561     * @attr ref android.R.styleable#TextView_maxHeight
2562     */
2563    @android.view.RemotableViewMethod
2564    public void setMaxHeight(int maxHeight) {
2565        mMaximum = maxHeight;
2566        mMaxMode = PIXELS;
2567
2568        requestLayout();
2569        invalidate();
2570    }
2571
2572    /**
2573     * Makes the TextView exactly this many lines tall.
2574     *
2575     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2576     * height setting. A single line TextView will set this value to 1.
2577     *
2578     * @attr ref android.R.styleable#TextView_lines
2579     */
2580    @android.view.RemotableViewMethod
2581    public void setLines(int lines) {
2582        mMaximum = mMinimum = lines;
2583        mMaxMode = mMinMode = LINES;
2584
2585        requestLayout();
2586        invalidate();
2587    }
2588
2589    /**
2590     * Makes the TextView exactly this many pixels tall.
2591     * You could do the same thing by specifying this number in the
2592     * LayoutParams.
2593     *
2594     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2595     * height setting.
2596     *
2597     * @attr ref android.R.styleable#TextView_height
2598     */
2599    @android.view.RemotableViewMethod
2600    public void setHeight(int pixels) {
2601        mMaximum = mMinimum = pixels;
2602        mMaxMode = mMinMode = PIXELS;
2603
2604        requestLayout();
2605        invalidate();
2606    }
2607
2608    /**
2609     * Makes the TextView at least this many ems wide
2610     *
2611     * @attr ref android.R.styleable#TextView_minEms
2612     */
2613    @android.view.RemotableViewMethod
2614    public void setMinEms(int minems) {
2615        mMinWidth = minems;
2616        mMinWidthMode = EMS;
2617
2618        requestLayout();
2619        invalidate();
2620    }
2621
2622    /**
2623     * Makes the TextView at least this many pixels wide
2624     *
2625     * @attr ref android.R.styleable#TextView_minWidth
2626     */
2627    @android.view.RemotableViewMethod
2628    public void setMinWidth(int minpixels) {
2629        mMinWidth = minpixels;
2630        mMinWidthMode = PIXELS;
2631
2632        requestLayout();
2633        invalidate();
2634    }
2635
2636    /**
2637     * Makes the TextView at most this many ems wide
2638     *
2639     * @attr ref android.R.styleable#TextView_maxEms
2640     */
2641    @android.view.RemotableViewMethod
2642    public void setMaxEms(int maxems) {
2643        mMaxWidth = maxems;
2644        mMaxWidthMode = EMS;
2645
2646        requestLayout();
2647        invalidate();
2648    }
2649
2650    /**
2651     * Makes the TextView at most this many pixels wide
2652     *
2653     * @attr ref android.R.styleable#TextView_maxWidth
2654     */
2655    @android.view.RemotableViewMethod
2656    public void setMaxWidth(int maxpixels) {
2657        mMaxWidth = maxpixels;
2658        mMaxWidthMode = PIXELS;
2659
2660        requestLayout();
2661        invalidate();
2662    }
2663
2664    /**
2665     * Makes the TextView exactly this many ems wide
2666     *
2667     * @attr ref android.R.styleable#TextView_ems
2668     */
2669    @android.view.RemotableViewMethod
2670    public void setEms(int ems) {
2671        mMaxWidth = mMinWidth = ems;
2672        mMaxWidthMode = mMinWidthMode = EMS;
2673
2674        requestLayout();
2675        invalidate();
2676    }
2677
2678    /**
2679     * Makes the TextView exactly this many pixels wide.
2680     * You could do the same thing by specifying this number in the
2681     * LayoutParams.
2682     *
2683     * @attr ref android.R.styleable#TextView_width
2684     */
2685    @android.view.RemotableViewMethod
2686    public void setWidth(int pixels) {
2687        mMaxWidth = mMinWidth = pixels;
2688        mMaxWidthMode = mMinWidthMode = PIXELS;
2689
2690        requestLayout();
2691        invalidate();
2692    }
2693
2694
2695    /**
2696     * Sets line spacing for this TextView.  Each line will have its height
2697     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2698     *
2699     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2700     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2701     */
2702    public void setLineSpacing(float add, float mult) {
2703        mSpacingMult = mult;
2704        mSpacingAdd = add;
2705
2706        if (mLayout != null) {
2707            nullLayouts();
2708            requestLayout();
2709            invalidate();
2710        }
2711    }
2712
2713    /**
2714     * Convenience method: Append the specified text to the TextView's
2715     * display buffer, upgrading it to BufferType.EDITABLE if it was
2716     * not already editable.
2717     */
2718    public final void append(CharSequence text) {
2719        append(text, 0, text.length());
2720    }
2721
2722    /**
2723     * Convenience method: Append the specified text slice to the TextView's
2724     * display buffer, upgrading it to BufferType.EDITABLE if it was
2725     * not already editable.
2726     */
2727    public void append(CharSequence text, int start, int end) {
2728        if (!(mText instanceof Editable)) {
2729            setText(mText, BufferType.EDITABLE);
2730        }
2731
2732        ((Editable) mText).append(text, start, end);
2733    }
2734
2735    private void updateTextColors() {
2736        boolean inval = false;
2737        int color = mTextColor.getColorForState(getDrawableState(), 0);
2738        if (color != mCurTextColor) {
2739            mCurTextColor = color;
2740            inval = true;
2741        }
2742        if (mLinkTextColor != null) {
2743            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2744            if (color != mTextPaint.linkColor) {
2745                mTextPaint.linkColor = color;
2746                inval = true;
2747            }
2748        }
2749        if (mHintTextColor != null) {
2750            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2751            if (color != mCurHintTextColor && mText.length() == 0) {
2752                mCurHintTextColor = color;
2753                inval = true;
2754            }
2755        }
2756        if (inval) {
2757            invalidate();
2758        }
2759    }
2760
2761    @Override
2762    protected void drawableStateChanged() {
2763        super.drawableStateChanged();
2764        if (mTextColor != null && mTextColor.isStateful()
2765                || (mHintTextColor != null && mHintTextColor.isStateful())
2766                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2767            updateTextColors();
2768        }
2769
2770        final Drawables dr = mDrawables;
2771        if (dr != null) {
2772            int[] state = getDrawableState();
2773            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2774                dr.mDrawableTop.setState(state);
2775            }
2776            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2777                dr.mDrawableBottom.setState(state);
2778            }
2779            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2780                dr.mDrawableLeft.setState(state);
2781            }
2782            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2783                dr.mDrawableRight.setState(state);
2784            }
2785            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2786                dr.mDrawableStart.setState(state);
2787            }
2788            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2789                dr.mDrawableEnd.setState(state);
2790            }
2791        }
2792    }
2793
2794    /**
2795     * User interface state that is stored by TextView for implementing
2796     * {@link View#onSaveInstanceState}.
2797     */
2798    public static class SavedState extends BaseSavedState {
2799        int selStart;
2800        int selEnd;
2801        CharSequence text;
2802        boolean frozenWithFocus;
2803        CharSequence error;
2804
2805        SavedState(Parcelable superState) {
2806            super(superState);
2807        }
2808
2809        @Override
2810        public void writeToParcel(Parcel out, int flags) {
2811            super.writeToParcel(out, flags);
2812            out.writeInt(selStart);
2813            out.writeInt(selEnd);
2814            out.writeInt(frozenWithFocus ? 1 : 0);
2815            TextUtils.writeToParcel(text, out, flags);
2816
2817            if (error == null) {
2818                out.writeInt(0);
2819            } else {
2820                out.writeInt(1);
2821                TextUtils.writeToParcel(error, out, flags);
2822            }
2823        }
2824
2825        @Override
2826        public String toString() {
2827            String str = "TextView.SavedState{"
2828                    + Integer.toHexString(System.identityHashCode(this))
2829                    + " start=" + selStart + " end=" + selEnd;
2830            if (text != null) {
2831                str += " text=" + text;
2832            }
2833            return str + "}";
2834        }
2835
2836        @SuppressWarnings("hiding")
2837        public static final Parcelable.Creator<SavedState> CREATOR
2838                = new Parcelable.Creator<SavedState>() {
2839            public SavedState createFromParcel(Parcel in) {
2840                return new SavedState(in);
2841            }
2842
2843            public SavedState[] newArray(int size) {
2844                return new SavedState[size];
2845            }
2846        };
2847
2848        private SavedState(Parcel in) {
2849            super(in);
2850            selStart = in.readInt();
2851            selEnd = in.readInt();
2852            frozenWithFocus = (in.readInt() != 0);
2853            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2854
2855            if (in.readInt() != 0) {
2856                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2857            }
2858        }
2859    }
2860
2861    @Override
2862    public Parcelable onSaveInstanceState() {
2863        Parcelable superState = super.onSaveInstanceState();
2864
2865        // Save state if we are forced to
2866        boolean save = mFreezesText;
2867        int start = 0;
2868        int end = 0;
2869
2870        if (mText != null) {
2871            start = getSelectionStart();
2872            end = getSelectionEnd();
2873            if (start >= 0 || end >= 0) {
2874                // Or save state if there is a selection
2875                save = true;
2876            }
2877        }
2878
2879        if (save) {
2880            SavedState ss = new SavedState(superState);
2881            // XXX Should also save the current scroll position!
2882            ss.selStart = start;
2883            ss.selEnd = end;
2884
2885            if (mText instanceof Spanned) {
2886                /*
2887                 * Calling setText() strips off any ChangeWatchers;
2888                 * strip them now to avoid leaking references.
2889                 * But do it to a copy so that if there are any
2890                 * further changes to the text of this view, it
2891                 * won't get into an inconsistent state.
2892                 */
2893
2894                Spannable sp = new SpannableString(mText);
2895
2896                for (ChangeWatcher cw :
2897                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2898                    sp.removeSpan(cw);
2899                }
2900
2901                // hideControllers would do it, but it gets called after this method on rotation
2902                sp.removeSpan(mSuggestionRangeSpan);
2903
2904                ss.text = sp;
2905            } else {
2906                ss.text = mText.toString();
2907            }
2908
2909            if (isFocused() && start >= 0 && end >= 0) {
2910                ss.frozenWithFocus = true;
2911            }
2912
2913            ss.error = mError;
2914
2915            return ss;
2916        }
2917
2918        return superState;
2919    }
2920
2921    @Override
2922    public void onRestoreInstanceState(Parcelable state) {
2923        if (!(state instanceof SavedState)) {
2924            super.onRestoreInstanceState(state);
2925            return;
2926        }
2927
2928        SavedState ss = (SavedState)state;
2929        super.onRestoreInstanceState(ss.getSuperState());
2930
2931        // XXX restore buffer type too, as well as lots of other stuff
2932        if (ss.text != null) {
2933            setText(ss.text);
2934        }
2935
2936        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2937            if (mText instanceof Spannable) {
2938                int len = mText.length();
2939
2940                if (ss.selStart > len || ss.selEnd > len) {
2941                    String restored = "";
2942
2943                    if (ss.text != null) {
2944                        restored = "(restored) ";
2945                    }
2946
2947                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2948                          "/" + ss.selEnd + " out of range for " + restored +
2949                          "text " + mText);
2950                } else {
2951                    Selection.setSelection((Spannable) mText, ss.selStart,
2952                                           ss.selEnd);
2953
2954                    if (ss.frozenWithFocus) {
2955                        mFrozenWithFocus = true;
2956                    }
2957                }
2958            }
2959        }
2960
2961        if (ss.error != null) {
2962            final CharSequence error = ss.error;
2963            // Display the error later, after the first layout pass
2964            post(new Runnable() {
2965                public void run() {
2966                    setError(error);
2967                }
2968            });
2969        }
2970    }
2971
2972    /**
2973     * Control whether this text view saves its entire text contents when
2974     * freezing to an icicle, in addition to dynamic state such as cursor
2975     * position.  By default this is false, not saving the text.  Set to true
2976     * if the text in the text view is not being saved somewhere else in
2977     * persistent storage (such as in a content provider) so that if the
2978     * view is later thawed the user will not lose their data.
2979     *
2980     * @param freezesText Controls whether a frozen icicle should include the
2981     * entire text data: true to include it, false to not.
2982     *
2983     * @attr ref android.R.styleable#TextView_freezesText
2984     */
2985    @android.view.RemotableViewMethod
2986    public void setFreezesText(boolean freezesText) {
2987        mFreezesText = freezesText;
2988    }
2989
2990    /**
2991     * Return whether this text view is including its entire text contents
2992     * in frozen icicles.
2993     *
2994     * @return Returns true if text is included, false if it isn't.
2995     *
2996     * @see #setFreezesText
2997     */
2998    public boolean getFreezesText() {
2999        return mFreezesText;
3000    }
3001
3002    ///////////////////////////////////////////////////////////////////////////
3003
3004    /**
3005     * Sets the Factory used to create new Editables.
3006     */
3007    public final void setEditableFactory(Editable.Factory factory) {
3008        mEditableFactory = factory;
3009        setText(mText);
3010    }
3011
3012    /**
3013     * Sets the Factory used to create new Spannables.
3014     */
3015    public final void setSpannableFactory(Spannable.Factory factory) {
3016        mSpannableFactory = factory;
3017        setText(mText);
3018    }
3019
3020    /**
3021     * Sets the string value of the TextView. TextView <em>does not</em> accept
3022     * HTML-like formatting, which you can do with text strings in XML resource files.
3023     * To style your strings, attach android.text.style.* objects to a
3024     * {@link android.text.SpannableString SpannableString}, or see the
3025     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3026     * Available Resource Types</a> documentation for an example of setting
3027     * formatted text in the XML resource file.
3028     *
3029     * @attr ref android.R.styleable#TextView_text
3030     */
3031    @android.view.RemotableViewMethod
3032    public final void setText(CharSequence text) {
3033        setText(text, mBufferType);
3034    }
3035
3036    /**
3037     * Like {@link #setText(CharSequence)},
3038     * except that the cursor position (if any) is retained in the new text.
3039     *
3040     * @param text The new text to place in the text view.
3041     *
3042     * @see #setText(CharSequence)
3043     */
3044    @android.view.RemotableViewMethod
3045    public final void setTextKeepState(CharSequence text) {
3046        setTextKeepState(text, mBufferType);
3047    }
3048
3049    /**
3050     * Sets the text that this TextView is to display (see
3051     * {@link #setText(CharSequence)}) and also sets whether it is stored
3052     * in a styleable/spannable buffer and whether it is editable.
3053     *
3054     * @attr ref android.R.styleable#TextView_text
3055     * @attr ref android.R.styleable#TextView_bufferType
3056     */
3057    public void setText(CharSequence text, BufferType type) {
3058        setText(text, type, true, 0);
3059
3060        if (mCharWrapper != null) {
3061            mCharWrapper.mChars = null;
3062        }
3063    }
3064
3065    private void setText(CharSequence text, BufferType type,
3066                         boolean notifyBefore, int oldlen) {
3067        if (text == null) {
3068            text = "";
3069        }
3070
3071        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3072
3073        if (text instanceof Spanned &&
3074            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3075            setHorizontalFadingEdgeEnabled(
3076                    ViewConfiguration.get(mContext).isFadingMarqueeEnabled());
3077            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3078        }
3079
3080        int n = mFilters.length;
3081        for (int i = 0; i < n; i++) {
3082            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3083                                                  EMPTY_SPANNED, 0, 0);
3084            if (out != null) {
3085                text = out;
3086            }
3087        }
3088
3089        if (notifyBefore) {
3090            if (mText != null) {
3091                oldlen = mText.length();
3092                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3093            } else {
3094                sendBeforeTextChanged("", 0, 0, text.length());
3095            }
3096        }
3097
3098        boolean needEditableForNotification = false;
3099
3100        if (mListeners != null && mListeners.size() != 0) {
3101            needEditableForNotification = true;
3102        }
3103
3104        if (type == BufferType.EDITABLE || mInput != null ||
3105            needEditableForNotification) {
3106            Editable t = mEditableFactory.newEditable(text);
3107            text = t;
3108            setFilters(t, mFilters);
3109            InputMethodManager imm = InputMethodManager.peekInstance();
3110            if (imm != null) imm.restartInput(this);
3111        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3112            text = mSpannableFactory.newSpannable(text);
3113        } else if (!(text instanceof CharWrapper)) {
3114            text = TextUtils.stringOrSpannedString(text);
3115        }
3116
3117        if (mAutoLinkMask != 0) {
3118            Spannable s2;
3119
3120            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3121                s2 = (Spannable) text;
3122            } else {
3123                s2 = mSpannableFactory.newSpannable(text);
3124            }
3125
3126            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3127                text = s2;
3128                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3129
3130                /*
3131                 * We must go ahead and set the text before changing the
3132                 * movement method, because setMovementMethod() may call
3133                 * setText() again to try to upgrade the buffer type.
3134                 */
3135                mText = text;
3136
3137                // Do not change the movement method for text that support text selection as it
3138                // would prevent an arbitrary cursor displacement.
3139                if (mLinksClickable && !textCanBeSelected()) {
3140                    setMovementMethod(LinkMovementMethod.getInstance());
3141                }
3142            }
3143        }
3144
3145        mBufferType = type;
3146        mText = text;
3147
3148        if (mTransformation == null) {
3149            mTransformed = text;
3150        } else {
3151            mTransformed = mTransformation.getTransformation(text, this);
3152        }
3153
3154        final int textLength = text.length();
3155
3156        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3157            Spannable sp = (Spannable) text;
3158
3159            // Remove any ChangeWatchers that might have come
3160            // from other TextViews.
3161            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3162            final int count = watchers.length;
3163            for (int i = 0; i < count; i++)
3164                sp.removeSpan(watchers[i]);
3165
3166            if (mChangeWatcher == null)
3167                mChangeWatcher = new ChangeWatcher();
3168
3169            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3170                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3171
3172            if (mInput != null) {
3173                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3174            }
3175
3176            if (mTransformation != null) {
3177                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3178            }
3179
3180            if (mMovement != null) {
3181                mMovement.initialize(this, (Spannable) text);
3182
3183                /*
3184                 * Initializing the movement method will have set the
3185                 * selection, so reset mSelectionMoved to keep that from
3186                 * interfering with the normal on-focus selection-setting.
3187                 */
3188                mSelectionMoved = false;
3189            }
3190        }
3191
3192        if (mLayout != null) {
3193            checkForRelayout();
3194        }
3195
3196        sendOnTextChanged(text, 0, oldlen, textLength);
3197        onTextChanged(text, 0, oldlen, textLength);
3198
3199        if (needEditableForNotification) {
3200            sendAfterTextChanged((Editable) text);
3201        }
3202
3203        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3204        prepareCursorControllers();
3205    }
3206
3207    /**
3208     * Sets the TextView to display the specified slice of the specified
3209     * char array.  You must promise that you will not change the contents
3210     * of the array except for right before another call to setText(),
3211     * since the TextView has no way to know that the text
3212     * has changed and that it needs to invalidate and re-layout.
3213     */
3214    public final void setText(char[] text, int start, int len) {
3215        int oldlen = 0;
3216
3217        if (start < 0 || len < 0 || start + len > text.length) {
3218            throw new IndexOutOfBoundsException(start + ", " + len);
3219        }
3220
3221        /*
3222         * We must do the before-notification here ourselves because if
3223         * the old text is a CharWrapper we destroy it before calling
3224         * into the normal path.
3225         */
3226        if (mText != null) {
3227            oldlen = mText.length();
3228            sendBeforeTextChanged(mText, 0, oldlen, len);
3229        } else {
3230            sendBeforeTextChanged("", 0, 0, len);
3231        }
3232
3233        if (mCharWrapper == null) {
3234            mCharWrapper = new CharWrapper(text, start, len);
3235        } else {
3236            mCharWrapper.set(text, start, len);
3237        }
3238
3239        setText(mCharWrapper, mBufferType, false, oldlen);
3240    }
3241
3242    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3243        private char[] mChars;
3244        private int mStart, mLength;
3245
3246        public CharWrapper(char[] chars, int start, int len) {
3247            mChars = chars;
3248            mStart = start;
3249            mLength = len;
3250        }
3251
3252        /* package */ void set(char[] chars, int start, int len) {
3253            mChars = chars;
3254            mStart = start;
3255            mLength = len;
3256        }
3257
3258        public int length() {
3259            return mLength;
3260        }
3261
3262        public char charAt(int off) {
3263            return mChars[off + mStart];
3264        }
3265
3266        @Override
3267        public String toString() {
3268            return new String(mChars, mStart, mLength);
3269        }
3270
3271        public CharSequence subSequence(int start, int end) {
3272            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3273                throw new IndexOutOfBoundsException(start + ", " + end);
3274            }
3275
3276            return new String(mChars, start + mStart, end - start);
3277        }
3278
3279        public void getChars(int start, int end, char[] buf, int off) {
3280            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3281                throw new IndexOutOfBoundsException(start + ", " + end);
3282            }
3283
3284            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3285        }
3286
3287        public void drawText(Canvas c, int start, int end,
3288                             float x, float y, Paint p) {
3289            c.drawText(mChars, start + mStart, end - start, x, y, p);
3290        }
3291
3292        public void drawTextRun(Canvas c, int start, int end,
3293                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3294            int count = end - start;
3295            int contextCount = contextEnd - contextStart;
3296            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3297                    contextCount, x, y, flags, p);
3298        }
3299
3300        public float measureText(int start, int end, Paint p) {
3301            return p.measureText(mChars, start + mStart, end - start);
3302        }
3303
3304        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3305            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3306        }
3307
3308        public float getTextRunAdvances(int start, int end, int contextStart,
3309                int contextEnd, int flags, float[] advances, int advancesIndex,
3310                Paint p) {
3311            int count = end - start;
3312            int contextCount = contextEnd - contextStart;
3313            return p.getTextRunAdvances(mChars, start + mStart, count,
3314                    contextStart + mStart, contextCount, flags, advances,
3315                    advancesIndex);
3316        }
3317
3318        public float getTextRunAdvances(int start, int end, int contextStart,
3319                int contextEnd, int flags, float[] advances, int advancesIndex,
3320                Paint p, int reserved) {
3321            int count = end - start;
3322            int contextCount = contextEnd - contextStart;
3323            return p.getTextRunAdvances(mChars, start + mStart, count,
3324                    contextStart + mStart, contextCount, flags, advances,
3325                    advancesIndex, reserved);
3326        }
3327
3328        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3329                int offset, int cursorOpt, Paint p) {
3330            int contextCount = contextEnd - contextStart;
3331            return p.getTextRunCursor(mChars, contextStart + mStart,
3332                    contextCount, flags, offset + mStart, cursorOpt);
3333        }
3334    }
3335
3336    /**
3337     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3338     * except that the cursor position (if any) is retained in the new text.
3339     *
3340     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3341     */
3342    public final void setTextKeepState(CharSequence text, BufferType type) {
3343        int start = getSelectionStart();
3344        int end = getSelectionEnd();
3345        int len = text.length();
3346
3347        setText(text, type);
3348
3349        if (start >= 0 || end >= 0) {
3350            if (mText instanceof Spannable) {
3351                Selection.setSelection((Spannable) mText,
3352                                       Math.max(0, Math.min(start, len)),
3353                                       Math.max(0, Math.min(end, len)));
3354            }
3355        }
3356    }
3357
3358    @android.view.RemotableViewMethod
3359    public final void setText(int resid) {
3360        setText(getContext().getResources().getText(resid));
3361    }
3362
3363    public final void setText(int resid, BufferType type) {
3364        setText(getContext().getResources().getText(resid), type);
3365    }
3366
3367    /**
3368     * Sets the text to be displayed when the text of the TextView is empty.
3369     * Null means to use the normal empty text. The hint does not currently
3370     * participate in determining the size of the view.
3371     *
3372     * @attr ref android.R.styleable#TextView_hint
3373     */
3374    @android.view.RemotableViewMethod
3375    public final void setHint(CharSequence hint) {
3376        mHint = TextUtils.stringOrSpannedString(hint);
3377
3378        if (mLayout != null) {
3379            checkForRelayout();
3380        }
3381
3382        if (mText.length() == 0) {
3383            invalidate();
3384        }
3385    }
3386
3387    /**
3388     * Sets the text to be displayed when the text of the TextView is empty,
3389     * from a resource.
3390     *
3391     * @attr ref android.R.styleable#TextView_hint
3392     */
3393    @android.view.RemotableViewMethod
3394    public final void setHint(int resid) {
3395        setHint(getContext().getResources().getText(resid));
3396    }
3397
3398    /**
3399     * Returns the hint that is displayed when the text of the TextView
3400     * is empty.
3401     *
3402     * @attr ref android.R.styleable#TextView_hint
3403     */
3404    @ViewDebug.CapturedViewProperty
3405    public CharSequence getHint() {
3406        return mHint;
3407    }
3408
3409    private static boolean isMultilineInputType(int type) {
3410        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3411            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3412    }
3413
3414    /**
3415     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3416     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3417     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3418     * then a soft keyboard will not be displayed for this text view.
3419     *
3420     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3421     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3422     * type.
3423     *
3424     * @see #getInputType()
3425     * @see #setRawInputType(int)
3426     * @see android.text.InputType
3427     * @attr ref android.R.styleable#TextView_inputType
3428     */
3429    public void setInputType(int type) {
3430        final boolean wasPassword = isPasswordInputType(mInputType);
3431        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3432        setInputType(type, false);
3433        final boolean isPassword = isPasswordInputType(type);
3434        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3435        boolean forceUpdate = false;
3436        if (isPassword) {
3437            setTransformationMethod(PasswordTransformationMethod.getInstance());
3438            setTypefaceByIndex(MONOSPACE, 0);
3439        } else if (isVisiblePassword) {
3440            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3441                forceUpdate = true;
3442            }
3443            setTypefaceByIndex(MONOSPACE, 0);
3444        } else if (wasPassword || wasVisiblePassword) {
3445            // not in password mode, clean up typeface and transformation
3446            setTypefaceByIndex(-1, -1);
3447            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3448                forceUpdate = true;
3449            }
3450        }
3451
3452        boolean singleLine = !isMultilineInputType(type);
3453
3454        // We need to update the single line mode if it has changed or we
3455        // were previously in password mode.
3456        if (mSingleLine != singleLine || forceUpdate) {
3457            // Change single line mode, but only change the transformation if
3458            // we are not in password mode.
3459            applySingleLine(singleLine, !isPassword, true);
3460        }
3461
3462        InputMethodManager imm = InputMethodManager.peekInstance();
3463        if (imm != null) imm.restartInput(this);
3464    }
3465
3466    /**
3467     * It would be better to rely on the input type for everything. A password inputType should have
3468     * a password transformation. We should hence use isPasswordInputType instead of this method.
3469     *
3470     * We should:
3471     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3472     * would install the correct transformation).
3473     * - Refuse the installation of a non-password transformation in setTransformation if the input
3474     * type is password.
3475     *
3476     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3477     * is useful since it matches what the user can see (obfuscated text or not).
3478     *
3479     * @return true if the current transformation method is of the password type.
3480     */
3481    private boolean hasPasswordTransformationMethod() {
3482        return mTransformation instanceof PasswordTransformationMethod;
3483    }
3484
3485    private static boolean isPasswordInputType(int inputType) {
3486        final int variation =
3487                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3488        return variation
3489                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3490                || variation
3491                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3492                || variation
3493                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3494    }
3495
3496    private static boolean isVisiblePasswordInputType(int inputType) {
3497        final int variation =
3498                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3499        return variation
3500                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3501    }
3502
3503    /**
3504     * Directly change the content type integer of the text view, without
3505     * modifying any other state.
3506     * @see #setInputType(int)
3507     * @see android.text.InputType
3508     * @attr ref android.R.styleable#TextView_inputType
3509     */
3510    public void setRawInputType(int type) {
3511        mInputType = type;
3512    }
3513
3514    private void setInputType(int type, boolean direct) {
3515        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3516        KeyListener input;
3517        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3518            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3519            TextKeyListener.Capitalize cap;
3520            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3521                cap = TextKeyListener.Capitalize.CHARACTERS;
3522            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3523                cap = TextKeyListener.Capitalize.WORDS;
3524            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3525                cap = TextKeyListener.Capitalize.SENTENCES;
3526            } else {
3527                cap = TextKeyListener.Capitalize.NONE;
3528            }
3529            input = TextKeyListener.getInstance(autotext, cap);
3530        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3531            input = DigitsKeyListener.getInstance(
3532                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3533                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3534        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3535            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3536                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3537                    input = DateKeyListener.getInstance();
3538                    break;
3539                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3540                    input = TimeKeyListener.getInstance();
3541                    break;
3542                default:
3543                    input = DateTimeKeyListener.getInstance();
3544                    break;
3545            }
3546        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3547            input = DialerKeyListener.getInstance();
3548        } else {
3549            input = TextKeyListener.getInstance();
3550        }
3551        setRawInputType(type);
3552        if (direct) mInput = input;
3553        else {
3554            setKeyListenerOnly(input);
3555        }
3556    }
3557
3558    /**
3559     * Get the type of the content.
3560     *
3561     * @see #setInputType(int)
3562     * @see android.text.InputType
3563     */
3564    public int getInputType() {
3565        return mInputType;
3566    }
3567
3568    /**
3569     * Change the editor type integer associated with the text view, which
3570     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3571     * has focus.
3572     * @see #getImeOptions
3573     * @see android.view.inputmethod.EditorInfo
3574     * @attr ref android.R.styleable#TextView_imeOptions
3575     */
3576    public void setImeOptions(int imeOptions) {
3577        if (mInputContentType == null) {
3578            mInputContentType = new InputContentType();
3579        }
3580        mInputContentType.imeOptions = imeOptions;
3581    }
3582
3583    /**
3584     * Get the type of the IME editor.
3585     *
3586     * @see #setImeOptions(int)
3587     * @see android.view.inputmethod.EditorInfo
3588     */
3589    public int getImeOptions() {
3590        return mInputContentType != null
3591                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3592    }
3593
3594    /**
3595     * Change the custom IME action associated with the text view, which
3596     * will be reported to an IME with {@link EditorInfo#actionLabel}
3597     * and {@link EditorInfo#actionId} when it has focus.
3598     * @see #getImeActionLabel
3599     * @see #getImeActionId
3600     * @see android.view.inputmethod.EditorInfo
3601     * @attr ref android.R.styleable#TextView_imeActionLabel
3602     * @attr ref android.R.styleable#TextView_imeActionId
3603     */
3604    public void setImeActionLabel(CharSequence label, int actionId) {
3605        if (mInputContentType == null) {
3606            mInputContentType = new InputContentType();
3607        }
3608        mInputContentType.imeActionLabel = label;
3609        mInputContentType.imeActionId = actionId;
3610    }
3611
3612    /**
3613     * Get the IME action label previous set with {@link #setImeActionLabel}.
3614     *
3615     * @see #setImeActionLabel
3616     * @see android.view.inputmethod.EditorInfo
3617     */
3618    public CharSequence getImeActionLabel() {
3619        return mInputContentType != null
3620                ? mInputContentType.imeActionLabel : null;
3621    }
3622
3623    /**
3624     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3625     *
3626     * @see #setImeActionLabel
3627     * @see android.view.inputmethod.EditorInfo
3628     */
3629    public int getImeActionId() {
3630        return mInputContentType != null
3631                ? mInputContentType.imeActionId : 0;
3632    }
3633
3634    /**
3635     * Set a special listener to be called when an action is performed
3636     * on the text view.  This will be called when the enter key is pressed,
3637     * or when an action supplied to the IME is selected by the user.  Setting
3638     * this means that the normal hard key event will not insert a newline
3639     * into the text view, even if it is multi-line; holding down the ALT
3640     * modifier will, however, allow the user to insert a newline character.
3641     */
3642    public void setOnEditorActionListener(OnEditorActionListener l) {
3643        if (mInputContentType == null) {
3644            mInputContentType = new InputContentType();
3645        }
3646        mInputContentType.onEditorActionListener = l;
3647    }
3648
3649    /**
3650     * Called when an attached input method calls
3651     * {@link InputConnection#performEditorAction(int)
3652     * InputConnection.performEditorAction()}
3653     * for this text view.  The default implementation will call your action
3654     * listener supplied to {@link #setOnEditorActionListener}, or perform
3655     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3656     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3657     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3658     * EditorInfo.IME_ACTION_DONE}.
3659     *
3660     * <p>For backwards compatibility, if no IME options have been set and the
3661     * text view would not normally advance focus on enter, then
3662     * the NEXT and DONE actions received here will be turned into an enter
3663     * key down/up pair to go through the normal key handling.
3664     *
3665     * @param actionCode The code of the action being performed.
3666     *
3667     * @see #setOnEditorActionListener
3668     */
3669    public void onEditorAction(int actionCode) {
3670        final InputContentType ict = mInputContentType;
3671        if (ict != null) {
3672            if (ict.onEditorActionListener != null) {
3673                if (ict.onEditorActionListener.onEditorAction(this,
3674                        actionCode, null)) {
3675                    return;
3676                }
3677            }
3678
3679            // This is the handling for some default action.
3680            // Note that for backwards compatibility we don't do this
3681            // default handling if explicit ime options have not been given,
3682            // instead turning this into the normal enter key codes that an
3683            // app may be expecting.
3684            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3685                View v = focusSearch(FOCUS_DOWN);
3686                if (v != null) {
3687                    if (!v.requestFocus(FOCUS_DOWN)) {
3688                        throw new IllegalStateException("focus search returned a view " +
3689                                "that wasn't able to take focus!");
3690                    }
3691                }
3692                return;
3693
3694            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3695                View v = focusSearch(FOCUS_UP);
3696                if (v != null) {
3697                    if (!v.requestFocus(FOCUS_UP)) {
3698                        throw new IllegalStateException("focus search returned a view " +
3699                                "that wasn't able to take focus!");
3700                    }
3701                }
3702                return;
3703
3704            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3705                InputMethodManager imm = InputMethodManager.peekInstance();
3706                if (imm != null && imm.isActive(this)) {
3707                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3708                }
3709                return;
3710            }
3711        }
3712
3713        Handler h = getHandler();
3714        if (h != null) {
3715            long eventTime = SystemClock.uptimeMillis();
3716            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3717                    new KeyEvent(eventTime, eventTime,
3718                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3719                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3720                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3721                    | KeyEvent.FLAG_EDITOR_ACTION)));
3722            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3723                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3724                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3725                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3726                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3727                    | KeyEvent.FLAG_EDITOR_ACTION)));
3728        }
3729    }
3730
3731    /**
3732     * Set the private content type of the text, which is the
3733     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3734     * field that will be filled in when creating an input connection.
3735     *
3736     * @see #getPrivateImeOptions()
3737     * @see EditorInfo#privateImeOptions
3738     * @attr ref android.R.styleable#TextView_privateImeOptions
3739     */
3740    public void setPrivateImeOptions(String type) {
3741        if (mInputContentType == null) mInputContentType = new InputContentType();
3742        mInputContentType.privateImeOptions = type;
3743    }
3744
3745    /**
3746     * Get the private type of the content.
3747     *
3748     * @see #setPrivateImeOptions(String)
3749     * @see EditorInfo#privateImeOptions
3750     */
3751    public String getPrivateImeOptions() {
3752        return mInputContentType != null
3753                ? mInputContentType.privateImeOptions : null;
3754    }
3755
3756    /**
3757     * Set the extra input data of the text, which is the
3758     * {@link EditorInfo#extras TextBoxAttribute.extras}
3759     * Bundle that will be filled in when creating an input connection.  The
3760     * given integer is the resource ID of an XML resource holding an
3761     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3762     *
3763     * @see #getInputExtras(boolean)
3764     * @see EditorInfo#extras
3765     * @attr ref android.R.styleable#TextView_editorExtras
3766     */
3767    public void setInputExtras(int xmlResId)
3768            throws XmlPullParserException, IOException {
3769        XmlResourceParser parser = getResources().getXml(xmlResId);
3770        if (mInputContentType == null) mInputContentType = new InputContentType();
3771        mInputContentType.extras = new Bundle();
3772        getResources().parseBundleExtras(parser, mInputContentType.extras);
3773    }
3774
3775    /**
3776     * Retrieve the input extras currently associated with the text view, which
3777     * can be viewed as well as modified.
3778     *
3779     * @param create If true, the extras will be created if they don't already
3780     * exist.  Otherwise, null will be returned if none have been created.
3781     * @see #setInputExtras(int)
3782     * @see EditorInfo#extras
3783     * @attr ref android.R.styleable#TextView_editorExtras
3784     */
3785    public Bundle getInputExtras(boolean create) {
3786        if (mInputContentType == null) {
3787            if (!create) return null;
3788            mInputContentType = new InputContentType();
3789        }
3790        if (mInputContentType.extras == null) {
3791            if (!create) return null;
3792            mInputContentType.extras = new Bundle();
3793        }
3794        return mInputContentType.extras;
3795    }
3796
3797    /**
3798     * Returns the error message that was set to be displayed with
3799     * {@link #setError}, or <code>null</code> if no error was set
3800     * or if it the error was cleared by the widget after user input.
3801     */
3802    public CharSequence getError() {
3803        return mError;
3804    }
3805
3806    /**
3807     * Sets the right-hand compound drawable of the TextView to the "error"
3808     * icon and sets an error message that will be displayed in a popup when
3809     * the TextView has focus.  The icon and error message will be reset to
3810     * null when any key events cause changes to the TextView's text.  If the
3811     * <code>error</code> is <code>null</code>, the error message and icon
3812     * will be cleared.
3813     */
3814    @android.view.RemotableViewMethod
3815    public void setError(CharSequence error) {
3816        if (error == null) {
3817            setError(null, null);
3818        } else {
3819            Drawable dr = getContext().getResources().
3820                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3821
3822            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3823            setError(error, dr);
3824        }
3825    }
3826
3827    /**
3828     * Sets the right-hand compound drawable of the TextView to the specified
3829     * icon and sets an error message that will be displayed in a popup when
3830     * the TextView has focus.  The icon and error message will be reset to
3831     * null when any key events cause changes to the TextView's text.  The
3832     * drawable must already have had {@link Drawable#setBounds} set on it.
3833     * If the <code>error</code> is <code>null</code>, the error message will
3834     * be cleared (and you should provide a <code>null</code> icon as well).
3835     */
3836    public void setError(CharSequence error, Drawable icon) {
3837        error = TextUtils.stringOrSpannedString(error);
3838
3839        mError = error;
3840        mErrorWasChanged = true;
3841        final Drawables dr = mDrawables;
3842        if (dr != null) {
3843            switch (getResolvedLayoutDirection()) {
3844                default:
3845                case LAYOUT_DIRECTION_LTR:
3846                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3847                            dr.mDrawableBottom);
3848                    break;
3849                case LAYOUT_DIRECTION_RTL:
3850                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3851                            dr.mDrawableBottom);
3852                    break;
3853            }
3854        } else {
3855            setCompoundDrawables(null, null, icon, null);
3856        }
3857
3858        if (error == null) {
3859            if (mPopup != null) {
3860                if (mPopup.isShowing()) {
3861                    mPopup.dismiss();
3862                }
3863
3864                mPopup = null;
3865            }
3866        } else {
3867            if (isFocused()) {
3868                showError();
3869            }
3870        }
3871    }
3872
3873    private void showError() {
3874        if (getWindowToken() == null) {
3875            mShowErrorAfterAttach = true;
3876            return;
3877        }
3878
3879        if (mPopup == null) {
3880            LayoutInflater inflater = LayoutInflater.from(getContext());
3881            final TextView err = (TextView) inflater.inflate(
3882                    com.android.internal.R.layout.textview_hint, null);
3883
3884            final float scale = getResources().getDisplayMetrics().density;
3885            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3886            mPopup.setFocusable(false);
3887            // The user is entering text, so the input method is needed.  We
3888            // don't want the popup to be displayed on top of it.
3889            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3890        }
3891
3892        TextView tv = (TextView) mPopup.getContentView();
3893        chooseSize(mPopup, mError, tv);
3894        tv.setText(mError);
3895
3896        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3897        mPopup.fixDirection(mPopup.isAboveAnchor());
3898    }
3899
3900    private static class ErrorPopup extends PopupWindow {
3901        private boolean mAbove = false;
3902        private final TextView mView;
3903        private int mPopupInlineErrorBackgroundId = 0;
3904        private int mPopupInlineErrorAboveBackgroundId = 0;
3905
3906        ErrorPopup(TextView v, int width, int height) {
3907            super(v, width, height);
3908            mView = v;
3909            // Make sure the TextView has a background set as it will be used the first time it is
3910            // shown and positionned. Initialized with below background, which should have
3911            // dimensions identical to the above version for this to work (and is more likely).
3912            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3913                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3914            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3915        }
3916
3917        void fixDirection(boolean above) {
3918            mAbove = above;
3919
3920            if (above) {
3921                mPopupInlineErrorAboveBackgroundId =
3922                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3923                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3924            } else {
3925                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3926                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3927            }
3928
3929            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3930                mPopupInlineErrorBackgroundId);
3931        }
3932
3933        private int getResourceId(int currentId, int index) {
3934            if (currentId == 0) {
3935                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3936                        R.styleable.Theme);
3937                currentId = styledAttributes.getResourceId(index, 0);
3938                styledAttributes.recycle();
3939            }
3940            return currentId;
3941        }
3942
3943        @Override
3944        public void update(int x, int y, int w, int h, boolean force) {
3945            super.update(x, y, w, h, force);
3946
3947            boolean above = isAboveAnchor();
3948            if (above != mAbove) {
3949                fixDirection(above);
3950            }
3951        }
3952    }
3953
3954    /**
3955     * Returns the Y offset to make the pointy top of the error point
3956     * at the middle of the error icon.
3957     */
3958    private int getErrorX() {
3959        /*
3960         * The "25" is the distance between the point and the right edge
3961         * of the background
3962         */
3963        final float scale = getResources().getDisplayMetrics().density;
3964
3965        final Drawables dr = mDrawables;
3966        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3967                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3968    }
3969
3970    /**
3971     * Returns the Y offset to make the pointy top of the error point
3972     * at the bottom of the error icon.
3973     */
3974    private int getErrorY() {
3975        /*
3976         * Compound, not extended, because the icon is not clipped
3977         * if the text height is smaller.
3978         */
3979        final int compoundPaddingTop = getCompoundPaddingTop();
3980        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3981
3982        final Drawables dr = mDrawables;
3983        int icontop = compoundPaddingTop +
3984                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3985
3986        /*
3987         * The "2" is the distance between the point and the top edge
3988         * of the background.
3989         */
3990        final float scale = getResources().getDisplayMetrics().density;
3991        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
3992                (int) (2 * scale + 0.5f);
3993    }
3994
3995    private void hideError() {
3996        if (mPopup != null) {
3997            if (mPopup.isShowing()) {
3998                mPopup.dismiss();
3999            }
4000        }
4001
4002        mShowErrorAfterAttach = false;
4003    }
4004
4005    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4006        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4007        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4008
4009        /*
4010         * Figure out how big the text would be if we laid it out to the
4011         * full width of this view minus the border.
4012         */
4013        int cap = getWidth() - wid;
4014        if (cap < 0) {
4015            cap = 200; // We must not be measured yet -- setFrame() will fix it.
4016        }
4017
4018        Layout l = new StaticLayout(text, tv.getPaint(), cap,
4019                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4020        float max = 0;
4021        for (int i = 0; i < l.getLineCount(); i++) {
4022            max = Math.max(max, l.getLineWidth(i));
4023        }
4024
4025        /*
4026         * Now set the popup size to be big enough for the text plus the border.
4027         */
4028        pop.setWidth(wid + (int) Math.ceil(max));
4029        pop.setHeight(ht + l.getHeight());
4030    }
4031
4032
4033    @Override
4034    protected boolean setFrame(int l, int t, int r, int b) {
4035        boolean result = super.setFrame(l, t, r, b);
4036
4037        if (mPopup != null) {
4038            TextView tv = (TextView) mPopup.getContentView();
4039            chooseSize(mPopup, mError, tv);
4040            mPopup.update(this, getErrorX(), getErrorY(),
4041                          mPopup.getWidth(), mPopup.getHeight());
4042        }
4043
4044        restartMarqueeIfNeeded();
4045
4046        return result;
4047    }
4048
4049    private void restartMarqueeIfNeeded() {
4050        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4051            mRestartMarquee = false;
4052            startMarquee();
4053        }
4054    }
4055
4056    /**
4057     * Sets the list of input filters that will be used if the buffer is
4058     * Editable.  Has no effect otherwise.
4059     *
4060     * @attr ref android.R.styleable#TextView_maxLength
4061     */
4062    public void setFilters(InputFilter[] filters) {
4063        if (filters == null) {
4064            throw new IllegalArgumentException();
4065        }
4066
4067        mFilters = filters;
4068
4069        if (mText instanceof Editable) {
4070            setFilters((Editable) mText, filters);
4071        }
4072    }
4073
4074    /**
4075     * Sets the list of input filters on the specified Editable,
4076     * and includes mInput in the list if it is an InputFilter.
4077     */
4078    private void setFilters(Editable e, InputFilter[] filters) {
4079        if (mInput instanceof InputFilter) {
4080            InputFilter[] nf = new InputFilter[filters.length + 1];
4081
4082            System.arraycopy(filters, 0, nf, 0, filters.length);
4083            nf[filters.length] = (InputFilter) mInput;
4084
4085            e.setFilters(nf);
4086        } else {
4087            e.setFilters(filters);
4088        }
4089    }
4090
4091    /**
4092     * Returns the current list of input filters.
4093     */
4094    public InputFilter[] getFilters() {
4095        return mFilters;
4096    }
4097
4098    /////////////////////////////////////////////////////////////////////////
4099
4100    private int getVerticalOffset(boolean forceNormal) {
4101        int voffset = 0;
4102        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4103
4104        Layout l = mLayout;
4105        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4106            l = mHintLayout;
4107        }
4108
4109        if (gravity != Gravity.TOP) {
4110            int boxht;
4111
4112            if (l == mHintLayout) {
4113                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4114                        getCompoundPaddingBottom();
4115            } else {
4116                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4117                        getExtendedPaddingBottom();
4118            }
4119            int textht = l.getHeight();
4120
4121            if (textht < boxht) {
4122                if (gravity == Gravity.BOTTOM)
4123                    voffset = boxht - textht;
4124                else // (gravity == Gravity.CENTER_VERTICAL)
4125                    voffset = (boxht - textht) >> 1;
4126            }
4127        }
4128        return voffset;
4129    }
4130
4131    private int getBottomVerticalOffset(boolean forceNormal) {
4132        int voffset = 0;
4133        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4134
4135        Layout l = mLayout;
4136        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4137            l = mHintLayout;
4138        }
4139
4140        if (gravity != Gravity.BOTTOM) {
4141            int boxht;
4142
4143            if (l == mHintLayout) {
4144                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4145                        getCompoundPaddingBottom();
4146            } else {
4147                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4148                        getExtendedPaddingBottom();
4149            }
4150            int textht = l.getHeight();
4151
4152            if (textht < boxht) {
4153                if (gravity == Gravity.TOP)
4154                    voffset = boxht - textht;
4155                else // (gravity == Gravity.CENTER_VERTICAL)
4156                    voffset = (boxht - textht) >> 1;
4157            }
4158        }
4159        return voffset;
4160    }
4161
4162    private void invalidateCursorPath() {
4163        if (mHighlightPathBogus) {
4164            invalidateCursor();
4165        } else {
4166            final int horizontalPadding = getCompoundPaddingLeft();
4167            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4168
4169            if (mCursorCount == 0) {
4170                synchronized (sTempRect) {
4171                    /*
4172                     * The reason for this concern about the thickness of the
4173                     * cursor and doing the floor/ceil on the coordinates is that
4174                     * some EditTexts (notably textfields in the Browser) have
4175                     * anti-aliased text where not all the characters are
4176                     * necessarily at integer-multiple locations.  This should
4177                     * make sure the entire cursor gets invalidated instead of
4178                     * sometimes missing half a pixel.
4179                     */
4180                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4181                    if (thick < 1.0f) {
4182                        thick = 1.0f;
4183                    }
4184
4185                    thick /= 2.0f;
4186
4187                    mHighlightPath.computeBounds(sTempRect, false);
4188
4189                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4190                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4191                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4192                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4193                }
4194            } else {
4195                for (int i = 0; i < mCursorCount; i++) {
4196                    Rect bounds = mCursorDrawable[i].getBounds();
4197                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4198                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4199                }
4200            }
4201        }
4202    }
4203
4204    private void invalidateCursor() {
4205        int where = getSelectionEnd();
4206
4207        invalidateCursor(where, where, where);
4208    }
4209
4210    private void invalidateCursor(int a, int b, int c) {
4211        if (mLayout == null) {
4212            invalidate();
4213        } else {
4214            if (a >= 0 || b >= 0 || c >= 0) {
4215                int first = Math.min(Math.min(a, b), c);
4216                int last = Math.max(Math.max(a, b), c);
4217
4218                int line = mLayout.getLineForOffset(first);
4219                int top = mLayout.getLineTop(line);
4220
4221                // This is ridiculous, but the descent from the line above
4222                // can hang down into the line we really want to redraw,
4223                // so we have to invalidate part of the line above to make
4224                // sure everything that needs to be redrawn really is.
4225                // (But not the whole line above, because that would cause
4226                // the same problem with the descenders on the line above it!)
4227                if (line > 0) {
4228                    top -= mLayout.getLineDescent(line - 1);
4229                }
4230
4231                int line2;
4232
4233                if (first == last)
4234                    line2 = line;
4235                else
4236                    line2 = mLayout.getLineForOffset(last);
4237
4238                int bottom = mLayout.getLineTop(line2 + 1);
4239
4240                final int horizontalPadding = getCompoundPaddingLeft();
4241                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4242
4243                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4244                // the invalidated lines specified above.
4245                for (int i = 0; i < mCursorCount; i++) {
4246                    Rect bounds = mCursorDrawable[i].getBounds();
4247                    top = Math.min(top, bounds.top);
4248                    bottom = Math.max(bottom, bounds.bottom);
4249                    // Horizontal bounds are already full width, no need to update
4250                }
4251
4252                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4253                        horizontalPadding + mScrollX + getWidth() -
4254                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4255                        bottom + verticalPadding);
4256            }
4257        }
4258    }
4259
4260    private void registerForPreDraw() {
4261        final ViewTreeObserver observer = getViewTreeObserver();
4262
4263        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4264            observer.addOnPreDrawListener(this);
4265            mPreDrawState = PREDRAW_PENDING;
4266        } else if (mPreDrawState == PREDRAW_DONE) {
4267            mPreDrawState = PREDRAW_PENDING;
4268        }
4269
4270        // else state is PREDRAW_PENDING, so keep waiting.
4271    }
4272
4273    /**
4274     * {@inheritDoc}
4275     */
4276    public boolean onPreDraw() {
4277        if (mPreDrawState != PREDRAW_PENDING) {
4278            return true;
4279        }
4280
4281        if (mLayout == null) {
4282            assumeLayout();
4283        }
4284
4285        boolean changed = false;
4286
4287        if (mMovement != null) {
4288            /* This code also provides auto-scrolling when a cursor is moved using a
4289             * CursorController (insertion point or selection limits).
4290             * For selection, ensure start or end is visible depending on controller's state.
4291             */
4292            int curs = getSelectionEnd();
4293            // Do not create the controller if it is not already created.
4294            if (mSelectionModifierCursorController != null &&
4295                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4296                curs = getSelectionStart();
4297            }
4298
4299            /*
4300             * TODO: This should really only keep the end in view if
4301             * it already was before the text changed.  I'm not sure
4302             * of a good way to tell from here if it was.
4303             */
4304            if (curs < 0 &&
4305                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4306                curs = mText.length();
4307            }
4308
4309            if (curs >= 0) {
4310                changed = bringPointIntoView(curs);
4311            }
4312        } else {
4313            changed = bringTextIntoView();
4314        }
4315
4316        // This has to be checked here since:
4317        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4318        //   a screen rotation) since layout is not yet initialized at that point.
4319        if (mCreatedWithASelection) {
4320            startSelectionActionMode();
4321            mCreatedWithASelection = false;
4322        }
4323
4324        // Phone specific code (there is no ExtractEditText on tablets).
4325        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4326        // not be set. Do the test here instead.
4327        if (this instanceof ExtractEditText && hasSelection()) {
4328            startSelectionActionMode();
4329        }
4330
4331        mPreDrawState = PREDRAW_DONE;
4332        return !changed;
4333    }
4334
4335    @Override
4336    protected void onAttachedToWindow() {
4337        super.onAttachedToWindow();
4338
4339        mTemporaryDetach = false;
4340
4341        if (mShowErrorAfterAttach) {
4342            showError();
4343            mShowErrorAfterAttach = false;
4344        }
4345
4346        final ViewTreeObserver observer = getViewTreeObserver();
4347        // No need to create the controller.
4348        // The get method will add the listener on controller creation.
4349        if (mInsertionPointCursorController != null) {
4350            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4351        }
4352        if (mSelectionModifierCursorController != null) {
4353            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4354        }
4355
4356        // Resolve drawables as the layout direction has been resolved
4357        resolveDrawables();
4358    }
4359
4360    @Override
4361    protected void onDetachedFromWindow() {
4362        super.onDetachedFromWindow();
4363
4364        final ViewTreeObserver observer = getViewTreeObserver();
4365        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4366            observer.removeOnPreDrawListener(this);
4367            mPreDrawState = PREDRAW_NOT_REGISTERED;
4368        }
4369
4370        if (mError != null) {
4371            hideError();
4372        }
4373
4374        if (mBlink != null) {
4375            mBlink.removeCallbacks(mBlink);
4376        }
4377
4378        if (mInsertionPointCursorController != null) {
4379            mInsertionPointCursorController.onDetached();
4380        }
4381
4382        if (mSelectionModifierCursorController != null) {
4383            mSelectionModifierCursorController.onDetached();
4384        }
4385
4386        hideControllers();
4387
4388        resetResolvedDrawables();
4389    }
4390
4391    @Override
4392    protected boolean isPaddingOffsetRequired() {
4393        return mShadowRadius != 0 || mDrawables != null;
4394    }
4395
4396    @Override
4397    protected int getLeftPaddingOffset() {
4398        return getCompoundPaddingLeft() - mPaddingLeft +
4399                (int) Math.min(0, mShadowDx - mShadowRadius);
4400    }
4401
4402    @Override
4403    protected int getTopPaddingOffset() {
4404        return (int) Math.min(0, mShadowDy - mShadowRadius);
4405    }
4406
4407    @Override
4408    protected int getBottomPaddingOffset() {
4409        return (int) Math.max(0, mShadowDy + mShadowRadius);
4410    }
4411
4412    @Override
4413    protected int getRightPaddingOffset() {
4414        return -(getCompoundPaddingRight() - mPaddingRight) +
4415                (int) Math.max(0, mShadowDx + mShadowRadius);
4416    }
4417
4418    @Override
4419    protected boolean verifyDrawable(Drawable who) {
4420        final boolean verified = super.verifyDrawable(who);
4421        if (!verified && mDrawables != null) {
4422            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4423                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4424                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4425        }
4426        return verified;
4427    }
4428
4429    @Override
4430    public void jumpDrawablesToCurrentState() {
4431        super.jumpDrawablesToCurrentState();
4432        if (mDrawables != null) {
4433            if (mDrawables.mDrawableLeft != null) {
4434                mDrawables.mDrawableLeft.jumpToCurrentState();
4435            }
4436            if (mDrawables.mDrawableTop != null) {
4437                mDrawables.mDrawableTop.jumpToCurrentState();
4438            }
4439            if (mDrawables.mDrawableRight != null) {
4440                mDrawables.mDrawableRight.jumpToCurrentState();
4441            }
4442            if (mDrawables.mDrawableBottom != null) {
4443                mDrawables.mDrawableBottom.jumpToCurrentState();
4444            }
4445            if (mDrawables.mDrawableStart != null) {
4446                mDrawables.mDrawableStart.jumpToCurrentState();
4447            }
4448            if (mDrawables.mDrawableEnd != null) {
4449                mDrawables.mDrawableEnd.jumpToCurrentState();
4450            }
4451        }
4452    }
4453
4454    @Override
4455    public void invalidateDrawable(Drawable drawable) {
4456        if (verifyDrawable(drawable)) {
4457            final Rect dirty = drawable.getBounds();
4458            int scrollX = mScrollX;
4459            int scrollY = mScrollY;
4460
4461            // IMPORTANT: The coordinates below are based on the coordinates computed
4462            // for each compound drawable in onDraw(). Make sure to update each section
4463            // accordingly.
4464            final TextView.Drawables drawables = mDrawables;
4465            if (drawables != null) {
4466                if (drawable == drawables.mDrawableLeft) {
4467                    final int compoundPaddingTop = getCompoundPaddingTop();
4468                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4469                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4470
4471                    scrollX += mPaddingLeft;
4472                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4473                } else if (drawable == drawables.mDrawableRight) {
4474                    final int compoundPaddingTop = getCompoundPaddingTop();
4475                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4476                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4477
4478                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4479                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4480                } else if (drawable == drawables.mDrawableTop) {
4481                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4482                    final int compoundPaddingRight = getCompoundPaddingRight();
4483                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4484
4485                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4486                    scrollY += mPaddingTop;
4487                } else if (drawable == drawables.mDrawableBottom) {
4488                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4489                    final int compoundPaddingRight = getCompoundPaddingRight();
4490                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4491
4492                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4493                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4494                }
4495            }
4496
4497            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4498                    dirty.right + scrollX, dirty.bottom + scrollY);
4499        }
4500    }
4501
4502    /**
4503     * @hide
4504     */
4505    @Override
4506    public int getResolvedLayoutDirection(Drawable who) {
4507        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4508        if (mDrawables != null) {
4509            final Drawables drawables = mDrawables;
4510            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4511                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4512                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4513                return getResolvedLayoutDirection();
4514            }
4515        }
4516        return super.getResolvedLayoutDirection(who);
4517    }
4518
4519    @Override
4520    protected boolean onSetAlpha(int alpha) {
4521        // Alpha is supported if and only if the drawing can be done in one pass.
4522        // TODO text with spans with a background color currently do not respect this alpha.
4523        if (getBackground() == null) {
4524            mCurrentAlpha = alpha;
4525            final Drawables dr = mDrawables;
4526            if (dr != null) {
4527                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4528                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4529                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4530                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4531                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4532                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4533            }
4534            return true;
4535        }
4536
4537        mCurrentAlpha = 255;
4538        return false;
4539    }
4540
4541    /**
4542     * When a TextView is used to display a useful piece of information to the user (such as a
4543     * contact's address), it should be made selectable, so that the user can select and copy this
4544     * content.
4545     *
4546     * Use {@link #setTextIsSelectable(boolean)} or the
4547     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4548     * selectable (text is not selectable by default).
4549     *
4550     * Note that this method simply returns the state of this flag. Although this flag has to be set
4551     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4552     * always be selected, independently of the value of this flag.
4553     *
4554     * @return True if the text displayed in this TextView can be selected by the user.
4555     *
4556     * @attr ref android.R.styleable#TextView_textIsSelectable
4557     */
4558    public boolean isTextSelectable() {
4559        return mTextIsSelectable;
4560    }
4561
4562    /**
4563     * Sets whether or not (default) the content of this view is selectable by the user.
4564     *
4565     * Note that this methods affect the {@link #setFocusable(boolean)},
4566     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4567     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4568     * customized.
4569     *
4570     * See {@link #isTextSelectable} for details.
4571     *
4572     * @param selectable Whether or not the content of this TextView should be selectable.
4573     */
4574    public void setTextIsSelectable(boolean selectable) {
4575        if (mTextIsSelectable == selectable) return;
4576
4577        mTextIsSelectable = selectable;
4578
4579        setFocusableInTouchMode(selectable);
4580        setFocusable(selectable);
4581        setClickable(selectable);
4582        setLongClickable(selectable);
4583
4584        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4585
4586        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4587        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4588
4589        // Called by setText above, but safer in case of future code changes
4590        prepareCursorControllers();
4591    }
4592
4593    @Override
4594    protected int[] onCreateDrawableState(int extraSpace) {
4595        final int[] drawableState;
4596
4597        if (mSingleLine) {
4598            drawableState = super.onCreateDrawableState(extraSpace);
4599        } else {
4600            drawableState = super.onCreateDrawableState(extraSpace + 1);
4601            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4602        }
4603
4604        if (mTextIsSelectable) {
4605            // Disable pressed state, which was introduced when TextView was made clickable.
4606            // Prevents text color change.
4607            // setClickable(false) would have a similar effect, but it also disables focus changes
4608            // and long press actions, which are both needed by text selection.
4609            final int length = drawableState.length;
4610            for (int i = 0; i < length; i++) {
4611                if (drawableState[i] == R.attr.state_pressed) {
4612                    final int[] nonPressedState = new int[length - 1];
4613                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4614                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4615                    return nonPressedState;
4616                }
4617            }
4618        }
4619
4620        return drawableState;
4621    }
4622
4623    @Override
4624    protected void onDraw(Canvas canvas) {
4625        if (mPreDrawState == PREDRAW_DONE) {
4626            final ViewTreeObserver observer = getViewTreeObserver();
4627            observer.removeOnPreDrawListener(this);
4628            mPreDrawState = PREDRAW_NOT_REGISTERED;
4629        }
4630
4631        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4632
4633        restartMarqueeIfNeeded();
4634
4635        // Draw the background for this view
4636        super.onDraw(canvas);
4637
4638        final int compoundPaddingLeft = getCompoundPaddingLeft();
4639        final int compoundPaddingTop = getCompoundPaddingTop();
4640        final int compoundPaddingRight = getCompoundPaddingRight();
4641        final int compoundPaddingBottom = getCompoundPaddingBottom();
4642        final int scrollX = mScrollX;
4643        final int scrollY = mScrollY;
4644        final int right = mRight;
4645        final int left = mLeft;
4646        final int bottom = mBottom;
4647        final int top = mTop;
4648
4649        final Drawables dr = mDrawables;
4650        if (dr != null) {
4651            /*
4652             * Compound, not extended, because the icon is not clipped
4653             * if the text height is smaller.
4654             */
4655
4656            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4657            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4658
4659            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4660            // Make sure to update invalidateDrawable() when changing this code.
4661            if (dr.mDrawableLeft != null) {
4662                canvas.save();
4663                canvas.translate(scrollX + mPaddingLeft,
4664                                 scrollY + compoundPaddingTop +
4665                                 (vspace - dr.mDrawableHeightLeft) / 2);
4666                dr.mDrawableLeft.draw(canvas);
4667                canvas.restore();
4668            }
4669
4670            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4671            // Make sure to update invalidateDrawable() when changing this code.
4672            if (dr.mDrawableRight != null) {
4673                canvas.save();
4674                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4675                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4676                dr.mDrawableRight.draw(canvas);
4677                canvas.restore();
4678            }
4679
4680            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4681            // Make sure to update invalidateDrawable() when changing this code.
4682            if (dr.mDrawableTop != null) {
4683                canvas.save();
4684                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4685                        scrollY + mPaddingTop);
4686                dr.mDrawableTop.draw(canvas);
4687                canvas.restore();
4688            }
4689
4690            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4691            // Make sure to update invalidateDrawable() when changing this code.
4692            if (dr.mDrawableBottom != null) {
4693                canvas.save();
4694                canvas.translate(scrollX + compoundPaddingLeft +
4695                        (hspace - dr.mDrawableWidthBottom) / 2,
4696                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4697                dr.mDrawableBottom.draw(canvas);
4698                canvas.restore();
4699            }
4700        }
4701
4702        int color = mCurTextColor;
4703
4704        if (mLayout == null) {
4705            assumeLayout();
4706        }
4707
4708        Layout layout = mLayout;
4709        int cursorcolor = color;
4710
4711        if (mHint != null && mText.length() == 0) {
4712            if (mHintTextColor != null) {
4713                color = mCurHintTextColor;
4714            }
4715
4716            layout = mHintLayout;
4717        }
4718
4719        mTextPaint.setColor(color);
4720        if (mCurrentAlpha != 255) {
4721            // If set, the alpha will override the color's alpha. Multiply the alphas.
4722            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4723        }
4724        mTextPaint.drawableState = getDrawableState();
4725
4726        canvas.save();
4727        /*  Would be faster if we didn't have to do this. Can we chop the
4728            (displayable) text so that we don't need to do this ever?
4729        */
4730
4731        int extendedPaddingTop = getExtendedPaddingTop();
4732        int extendedPaddingBottom = getExtendedPaddingBottom();
4733
4734        float clipLeft = compoundPaddingLeft + scrollX;
4735        float clipTop = extendedPaddingTop + scrollY;
4736        float clipRight = right - left - compoundPaddingRight + scrollX;
4737        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4738
4739        if (mShadowRadius != 0) {
4740            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4741            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4742
4743            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4744            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4745        }
4746
4747        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4748
4749        int voffsetText = 0;
4750        int voffsetCursor = 0;
4751
4752        // translate in by our padding
4753        {
4754            /* shortcircuit calling getVerticaOffset() */
4755            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4756                voffsetText = getVerticalOffset(false);
4757                voffsetCursor = getVerticalOffset(true);
4758            }
4759            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4760        }
4761
4762        final int layoutDirection = getResolvedLayoutDirection();
4763        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4764        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4765            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4766                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4767                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4768                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4769            }
4770
4771            if (mMarquee != null && mMarquee.isRunning()) {
4772                canvas.translate(-mMarquee.mScroll, 0.0f);
4773            }
4774        }
4775
4776        Path highlight = null;
4777        int selStart = -1, selEnd = -1;
4778        boolean drawCursor = false;
4779
4780        //  If there is no movement method, then there can be no selection.
4781        //  Check that first and attempt to skip everything having to do with
4782        //  the cursor.
4783        //  XXX This is not strictly true -- a program could set the
4784        //  selection manually if it really wanted to.
4785        if (mMovement != null && (isFocused() || isPressed())) {
4786            selStart = getSelectionStart();
4787            selEnd = getSelectionEnd();
4788
4789            if (selStart >= 0) {
4790                if (mHighlightPath == null)
4791                    mHighlightPath = new Path();
4792
4793                if (selStart == selEnd) {
4794                    if (isCursorVisible() &&
4795                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4796                        if (mHighlightPathBogus) {
4797                            mHighlightPath.reset();
4798                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4799                            updateCursorsPositions();
4800                            mHighlightPathBogus = false;
4801                        }
4802
4803                        // XXX should pass to skin instead of drawing directly
4804                        mHighlightPaint.setColor(cursorcolor);
4805                        if (mCurrentAlpha != 255) {
4806                            mHighlightPaint.setAlpha(
4807                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4808                        }
4809                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4810                        highlight = mHighlightPath;
4811                        drawCursor = mCursorCount > 0;
4812                    }
4813                } else if (textCanBeSelected()) {
4814                    if (mHighlightPathBogus) {
4815                        mHighlightPath.reset();
4816                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4817                        mHighlightPathBogus = false;
4818                    }
4819
4820                    // XXX should pass to skin instead of drawing directly
4821                    mHighlightPaint.setColor(mHighlightColor);
4822                    if (mCurrentAlpha != 255) {
4823                        mHighlightPaint.setAlpha(
4824                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4825                    }
4826                    mHighlightPaint.setStyle(Paint.Style.FILL);
4827
4828                    highlight = mHighlightPath;
4829                }
4830            }
4831        }
4832
4833        /*  Comment out until we decide what to do about animations
4834        boolean isLinearTextOn = false;
4835        if (currentTransformation != null) {
4836            isLinearTextOn = mTextPaint.isLinearTextOn();
4837            Matrix m = currentTransformation.getMatrix();
4838            if (!m.isIdentity()) {
4839                // mTextPaint.setLinearTextOn(true);
4840            }
4841        }
4842        */
4843
4844        final InputMethodState ims = mInputMethodState;
4845        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4846        if (ims != null && ims.mBatchEditNesting == 0) {
4847            InputMethodManager imm = InputMethodManager.peekInstance();
4848            if (imm != null) {
4849                if (imm.isActive(this)) {
4850                    boolean reported = false;
4851                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4852                        // We are in extract mode and the content has changed
4853                        // in some way... just report complete new text to the
4854                        // input method.
4855                        reported = reportExtractedText();
4856                    }
4857                    if (!reported && highlight != null) {
4858                        int candStart = -1;
4859                        int candEnd = -1;
4860                        if (mText instanceof Spannable) {
4861                            Spannable sp = (Spannable)mText;
4862                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4863                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4864                        }
4865                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4866                    }
4867                }
4868
4869                if (imm.isWatchingCursor(this) && highlight != null) {
4870                    highlight.computeBounds(ims.mTmpRectF, true);
4871                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4872
4873                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4874                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4875
4876                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4877
4878                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4879                            (int)(ims.mTmpRectF.top + 0.5),
4880                            (int)(ims.mTmpRectF.right + 0.5),
4881                            (int)(ims.mTmpRectF.bottom + 0.5));
4882
4883                    imm.updateCursor(this,
4884                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4885                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4886                }
4887            }
4888        }
4889
4890        if (mCorrectionHighlighter != null) {
4891            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4892        }
4893
4894        if (drawCursor) {
4895            drawCursor(canvas, cursorOffsetVertical);
4896            // Rely on the drawable entirely, do not draw the cursor line.
4897            // Has to be done after the IMM related code above which relies on the highlight.
4898            highlight = null;
4899        }
4900
4901        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4902
4903        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4904            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4905            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4906        }
4907
4908        /*  Comment out until we decide what to do about animations
4909        if (currentTransformation != null) {
4910            mTextPaint.setLinearTextOn(isLinearTextOn);
4911        }
4912        */
4913
4914        canvas.restore();
4915    }
4916
4917    private void updateCursorsPositions() {
4918        if (mCursorDrawableRes == 0) {
4919            mCursorCount = 0;
4920            return;
4921        }
4922
4923        final int offset = getSelectionStart();
4924        final int line = mLayout.getLineForOffset(offset);
4925        final int top = mLayout.getLineTop(line);
4926        final int bottom = mLayout.getLineTop(line + 1);
4927
4928        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4929
4930        int middle = bottom;
4931        if (mCursorCount == 2) {
4932            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4933            middle = (top + bottom) >> 1;
4934        }
4935
4936        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4937
4938        if (mCursorCount == 2) {
4939            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4940        }
4941    }
4942
4943    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4944        if (mCursorDrawable[cursorIndex] == null)
4945            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4946
4947        if (mTempRect == null) mTempRect = new Rect();
4948
4949        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4950        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4951        horizontal = Math.max(0.5f, horizontal - 0.5f);
4952        final int left = (int) (horizontal) - mTempRect.left;
4953        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4954                bottom + mTempRect.bottom);
4955    }
4956
4957    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4958        final boolean translate = cursorOffsetVertical != 0;
4959        if (translate) canvas.translate(0, cursorOffsetVertical);
4960        for (int i = 0; i < mCursorCount; i++) {
4961            mCursorDrawable[i].draw(canvas);
4962        }
4963        if (translate) canvas.translate(0, -cursorOffsetVertical);
4964    }
4965
4966    @Override
4967    public void getFocusedRect(Rect r) {
4968        if (mLayout == null) {
4969            super.getFocusedRect(r);
4970            return;
4971        }
4972
4973        int sel = getSelectionEnd();
4974        if (sel < 0) {
4975            super.getFocusedRect(r);
4976            return;
4977        }
4978
4979        int line = mLayout.getLineForOffset(sel);
4980        r.top = mLayout.getLineTop(line);
4981        r.bottom = mLayout.getLineBottom(line);
4982
4983        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4984        r.right = r.left + 1;
4985
4986        // Adjust for padding and gravity.
4987        int paddingLeft = getCompoundPaddingLeft();
4988        int paddingTop = getExtendedPaddingTop();
4989        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4990            paddingTop += getVerticalOffset(false);
4991        }
4992        r.offset(paddingLeft, paddingTop);
4993    }
4994
4995    /**
4996     * Return the number of lines of text, or 0 if the internal Layout has not
4997     * been built.
4998     */
4999    public int getLineCount() {
5000        return mLayout != null ? mLayout.getLineCount() : 0;
5001    }
5002
5003    /**
5004     * Return the baseline for the specified line (0...getLineCount() - 1)
5005     * If bounds is not null, return the top, left, right, bottom extents
5006     * of the specified line in it. If the internal Layout has not been built,
5007     * return 0 and set bounds to (0, 0, 0, 0)
5008     * @param line which line to examine (0..getLineCount() - 1)
5009     * @param bounds Optional. If not null, it returns the extent of the line
5010     * @return the Y-coordinate of the baseline
5011     */
5012    public int getLineBounds(int line, Rect bounds) {
5013        if (mLayout == null) {
5014            if (bounds != null) {
5015                bounds.set(0, 0, 0, 0);
5016            }
5017            return 0;
5018        }
5019        else {
5020            int baseline = mLayout.getLineBounds(line, bounds);
5021
5022            int voffset = getExtendedPaddingTop();
5023            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5024                voffset += getVerticalOffset(true);
5025            }
5026            if (bounds != null) {
5027                bounds.offset(getCompoundPaddingLeft(), voffset);
5028            }
5029            return baseline + voffset;
5030        }
5031    }
5032
5033    @Override
5034    public int getBaseline() {
5035        if (mLayout == null) {
5036            return super.getBaseline();
5037        }
5038
5039        int voffset = 0;
5040        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5041            voffset = getVerticalOffset(true);
5042        }
5043
5044        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5045    }
5046
5047    /**
5048     * @hide
5049     * @param offsetRequired
5050     */
5051    @Override
5052    protected int getFadeTop(boolean offsetRequired) {
5053        if (mLayout == null) return 0;
5054
5055        int voffset = 0;
5056        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5057            voffset = getVerticalOffset(true);
5058        }
5059
5060        if (offsetRequired) voffset += getTopPaddingOffset();
5061
5062        return getExtendedPaddingTop() + voffset;
5063    }
5064
5065    /**
5066     * @hide
5067     * @param offsetRequired
5068     */
5069    @Override
5070    protected int getFadeHeight(boolean offsetRequired) {
5071        return mLayout != null ? mLayout.getHeight() : 0;
5072    }
5073
5074    @Override
5075    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5076        if (keyCode == KeyEvent.KEYCODE_BACK) {
5077            boolean areSuggestionsShown = areSuggestionsShown();
5078            boolean isInSelectionMode = mSelectionActionMode != null;
5079
5080            if (areSuggestionsShown || isInSelectionMode) {
5081                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5082                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5083                    if (state != null) {
5084                        state.startTracking(event, this);
5085                    }
5086                    return true;
5087                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5088                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5089                    if (state != null) {
5090                        state.handleUpEvent(event);
5091                    }
5092                    if (event.isTracking() && !event.isCanceled()) {
5093                        if (areSuggestionsShown) {
5094                            hideSuggestions();
5095                            return true;
5096                        }
5097                        if (isInSelectionMode) {
5098                            stopSelectionActionMode();
5099                            return true;
5100                        }
5101                    }
5102                }
5103            }
5104        }
5105        return super.onKeyPreIme(keyCode, event);
5106    }
5107
5108    @Override
5109    public boolean onKeyDown(int keyCode, KeyEvent event) {
5110        int which = doKeyDown(keyCode, event, null);
5111        if (which == 0) {
5112            // Go through default dispatching.
5113            return super.onKeyDown(keyCode, event);
5114        }
5115
5116        return true;
5117    }
5118
5119    @Override
5120    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5121        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5122
5123        int which = doKeyDown(keyCode, down, event);
5124        if (which == 0) {
5125            // Go through default dispatching.
5126            return super.onKeyMultiple(keyCode, repeatCount, event);
5127        }
5128        if (which == -1) {
5129            // Consumed the whole thing.
5130            return true;
5131        }
5132
5133        repeatCount--;
5134
5135        // We are going to dispatch the remaining events to either the input
5136        // or movement method.  To do this, we will just send a repeated stream
5137        // of down and up events until we have done the complete repeatCount.
5138        // It would be nice if those interfaces had an onKeyMultiple() method,
5139        // but adding that is a more complicated change.
5140        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5141        if (which == 1) {
5142            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5143            while (--repeatCount > 0) {
5144                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5145                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5146            }
5147            hideErrorIfUnchanged();
5148
5149        } else if (which == 2) {
5150            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5151            while (--repeatCount > 0) {
5152                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5153                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5154            }
5155        }
5156
5157        return true;
5158    }
5159
5160    /**
5161     * Returns true if pressing ENTER in this field advances focus instead
5162     * of inserting the character.  This is true mostly in single-line fields,
5163     * but also in mail addresses and subjects which will display on multiple
5164     * lines but where it doesn't make sense to insert newlines.
5165     */
5166    private boolean shouldAdvanceFocusOnEnter() {
5167        if (mInput == null) {
5168            return false;
5169        }
5170
5171        if (mSingleLine) {
5172            return true;
5173        }
5174
5175        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5176            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5177            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5178                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5179                return true;
5180            }
5181        }
5182
5183        return false;
5184    }
5185
5186    /**
5187     * Returns true if pressing TAB in this field advances focus instead
5188     * of inserting the character.  Insert tabs only in multi-line editors.
5189     */
5190    private boolean shouldAdvanceFocusOnTab() {
5191        if (mInput != null && !mSingleLine) {
5192            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5193                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5194                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5195                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5196                    return false;
5197                }
5198            }
5199        }
5200        return true;
5201    }
5202
5203    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5204        if (!isEnabled()) {
5205            return 0;
5206        }
5207
5208        switch (keyCode) {
5209            case KeyEvent.KEYCODE_ENTER:
5210                mEnterKeyIsDown = true;
5211                if (event.hasNoModifiers()) {
5212                    // When mInputContentType is set, we know that we are
5213                    // running in a "modern" cupcake environment, so don't need
5214                    // to worry about the application trying to capture
5215                    // enter key events.
5216                    if (mInputContentType != null) {
5217                        // If there is an action listener, given them a
5218                        // chance to consume the event.
5219                        if (mInputContentType.onEditorActionListener != null &&
5220                                mInputContentType.onEditorActionListener.onEditorAction(
5221                                this, EditorInfo.IME_NULL, event)) {
5222                            mInputContentType.enterDown = true;
5223                            // We are consuming the enter key for them.
5224                            return -1;
5225                        }
5226                    }
5227
5228                    // If our editor should move focus when enter is pressed, or
5229                    // this is a generated event from an IME action button, then
5230                    // don't let it be inserted into the text.
5231                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5232                            || shouldAdvanceFocusOnEnter()) {
5233                        if (mOnClickListener != null) {
5234                            return 0;
5235                        }
5236                        return -1;
5237                    }
5238                }
5239                break;
5240
5241            case KeyEvent.KEYCODE_DPAD_CENTER:
5242                mDPadCenterIsDown = true;
5243                if (event.hasNoModifiers()) {
5244                    if (shouldAdvanceFocusOnEnter()) {
5245                        return 0;
5246                    }
5247                }
5248                break;
5249
5250            case KeyEvent.KEYCODE_TAB:
5251                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5252                    if (shouldAdvanceFocusOnTab()) {
5253                        return 0;
5254                    }
5255                }
5256                break;
5257
5258                // Has to be done on key down (and not on key up) to correctly be intercepted.
5259            case KeyEvent.KEYCODE_BACK:
5260                if (areSuggestionsShown()) {
5261                    hideSuggestions();
5262                    return -1;
5263                }
5264                if (mSelectionActionMode != null) {
5265                    stopSelectionActionMode();
5266                    return -1;
5267                }
5268                break;
5269        }
5270
5271        if (mInput != null) {
5272            resetErrorChangedFlag();
5273
5274            boolean doDown = true;
5275            if (otherEvent != null) {
5276                try {
5277                    beginBatchEdit();
5278                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5279                    hideErrorIfUnchanged();
5280                    doDown = false;
5281                    if (handled) {
5282                        return -1;
5283                    }
5284                } catch (AbstractMethodError e) {
5285                    // onKeyOther was added after 1.0, so if it isn't
5286                    // implemented we need to try to dispatch as a regular down.
5287                } finally {
5288                    endBatchEdit();
5289                }
5290            }
5291
5292            if (doDown) {
5293                beginBatchEdit();
5294                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5295                endBatchEdit();
5296                hideErrorIfUnchanged();
5297                if (handled) return 1;
5298            }
5299        }
5300
5301        // bug 650865: sometimes we get a key event before a layout.
5302        // don't try to move around if we don't know the layout.
5303
5304        if (mMovement != null && mLayout != null) {
5305            boolean doDown = true;
5306            if (otherEvent != null) {
5307                try {
5308                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5309                            otherEvent);
5310                    doDown = false;
5311                    if (handled) {
5312                        return -1;
5313                    }
5314                } catch (AbstractMethodError e) {
5315                    // onKeyOther was added after 1.0, so if it isn't
5316                    // implemented we need to try to dispatch as a regular down.
5317                }
5318            }
5319            if (doDown) {
5320                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5321                    return 2;
5322            }
5323        }
5324
5325        return 0;
5326    }
5327
5328    /**
5329     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5330     * can be recorded.
5331     * @hide
5332     */
5333    public void resetErrorChangedFlag() {
5334        /*
5335         * Keep track of what the error was before doing the input
5336         * so that if an input filter changed the error, we leave
5337         * that error showing.  Otherwise, we take down whatever
5338         * error was showing when the user types something.
5339         */
5340        mErrorWasChanged = false;
5341    }
5342
5343    /**
5344     * @hide
5345     */
5346    public void hideErrorIfUnchanged() {
5347        if (mError != null && !mErrorWasChanged) {
5348            setError(null, null);
5349        }
5350    }
5351
5352    @Override
5353    public boolean onKeyUp(int keyCode, KeyEvent event) {
5354        if (!isEnabled()) {
5355            return super.onKeyUp(keyCode, event);
5356        }
5357
5358        switch (keyCode) {
5359            case KeyEvent.KEYCODE_DPAD_CENTER:
5360                mDPadCenterIsDown = false;
5361                if (event.hasNoModifiers()) {
5362                    /*
5363                     * If there is a click listener, just call through to
5364                     * super, which will invoke it.
5365                     *
5366                     * If there isn't a click listener, try to show the soft
5367                     * input method.  (It will also
5368                     * call performClick(), but that won't do anything in
5369                     * this case.)
5370                     */
5371                    if (mOnClickListener == null) {
5372                        if (mMovement != null && mText instanceof Editable
5373                                && mLayout != null && onCheckIsTextEditor()) {
5374                            InputMethodManager imm = InputMethodManager.peekInstance();
5375                            if (imm != null) {
5376                                imm.viewClicked(this);
5377                                imm.showSoftInput(this, 0);
5378                            }
5379                        }
5380                    }
5381                }
5382                return super.onKeyUp(keyCode, event);
5383
5384            case KeyEvent.KEYCODE_ENTER:
5385                mEnterKeyIsDown = false;
5386                if (event.hasNoModifiers()) {
5387                    if (mInputContentType != null
5388                            && mInputContentType.onEditorActionListener != null
5389                            && mInputContentType.enterDown) {
5390                        mInputContentType.enterDown = false;
5391                        if (mInputContentType.onEditorActionListener.onEditorAction(
5392                                this, EditorInfo.IME_NULL, event)) {
5393                            return true;
5394                        }
5395                    }
5396
5397                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5398                            || shouldAdvanceFocusOnEnter()) {
5399                        /*
5400                         * If there is a click listener, just call through to
5401                         * super, which will invoke it.
5402                         *
5403                         * If there isn't a click listener, try to advance focus,
5404                         * but still call through to super, which will reset the
5405                         * pressed state and longpress state.  (It will also
5406                         * call performClick(), but that won't do anything in
5407                         * this case.)
5408                         */
5409                        if (mOnClickListener == null) {
5410                            View v = focusSearch(FOCUS_DOWN);
5411
5412                            if (v != null) {
5413                                if (!v.requestFocus(FOCUS_DOWN)) {
5414                                    throw new IllegalStateException(
5415                                            "focus search returned a view " +
5416                                            "that wasn't able to take focus!");
5417                                }
5418
5419                                /*
5420                                 * Return true because we handled the key; super
5421                                 * will return false because there was no click
5422                                 * listener.
5423                                 */
5424                                super.onKeyUp(keyCode, event);
5425                                return true;
5426                            } else if ((event.getFlags()
5427                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5428                                // No target for next focus, but make sure the IME
5429                                // if this came from it.
5430                                InputMethodManager imm = InputMethodManager.peekInstance();
5431                                if (imm != null && imm.isActive(this)) {
5432                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5433                                }
5434                            }
5435                        }
5436                    }
5437                    return super.onKeyUp(keyCode, event);
5438                }
5439                break;
5440        }
5441
5442        if (mInput != null)
5443            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5444                return true;
5445
5446        if (mMovement != null && mLayout != null)
5447            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5448                return true;
5449
5450        return super.onKeyUp(keyCode, event);
5451    }
5452
5453    @Override public boolean onCheckIsTextEditor() {
5454        return mInputType != EditorInfo.TYPE_NULL;
5455    }
5456
5457    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5458        if (onCheckIsTextEditor() && isEnabled()) {
5459            if (mInputMethodState == null) {
5460                mInputMethodState = new InputMethodState();
5461            }
5462            outAttrs.inputType = mInputType;
5463            if (mInputContentType != null) {
5464                outAttrs.imeOptions = mInputContentType.imeOptions;
5465                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5466                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5467                outAttrs.actionId = mInputContentType.imeActionId;
5468                outAttrs.extras = mInputContentType.extras;
5469            } else {
5470                outAttrs.imeOptions = EditorInfo.IME_NULL;
5471            }
5472            if (focusSearch(FOCUS_DOWN) != null) {
5473                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5474            }
5475            if (focusSearch(FOCUS_UP) != null) {
5476                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5477            }
5478            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5479                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5480                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5481                    // An action has not been set, but the enter key will move to
5482                    // the next focus, so set the action to that.
5483                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5484                } else {
5485                    // An action has not been set, and there is no focus to move
5486                    // to, so let's just supply a "done" action.
5487                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5488                }
5489                if (!shouldAdvanceFocusOnEnter()) {
5490                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5491                }
5492            }
5493            if (isMultilineInputType(outAttrs.inputType)) {
5494                // Multi-line text editors should always show an enter key.
5495                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5496            }
5497            outAttrs.hintText = mHint;
5498            if (mText instanceof Editable) {
5499                InputConnection ic = new EditableInputConnection(this);
5500                outAttrs.initialSelStart = getSelectionStart();
5501                outAttrs.initialSelEnd = getSelectionEnd();
5502                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5503                return ic;
5504            }
5505        }
5506        return null;
5507    }
5508
5509    /**
5510     * If this TextView contains editable content, extract a portion of it
5511     * based on the information in <var>request</var> in to <var>outText</var>.
5512     * @return Returns true if the text was successfully extracted, else false.
5513     */
5514    public boolean extractText(ExtractedTextRequest request,
5515            ExtractedText outText) {
5516        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5517                EXTRACT_UNKNOWN, outText);
5518    }
5519
5520    static final int EXTRACT_NOTHING = -2;
5521    static final int EXTRACT_UNKNOWN = -1;
5522
5523    boolean extractTextInternal(ExtractedTextRequest request,
5524            int partialStartOffset, int partialEndOffset, int delta,
5525            ExtractedText outText) {
5526        final CharSequence content = mText;
5527        if (content != null) {
5528            if (partialStartOffset != EXTRACT_NOTHING) {
5529                final int N = content.length();
5530                if (partialStartOffset < 0) {
5531                    outText.partialStartOffset = outText.partialEndOffset = -1;
5532                    partialStartOffset = 0;
5533                    partialEndOffset = N;
5534                } else {
5535                    // Now use the delta to determine the actual amount of text
5536                    // we need.
5537                    partialEndOffset += delta;
5538                    // Adjust offsets to ensure we contain full spans.
5539                    if (content instanceof Spanned) {
5540                        Spanned spanned = (Spanned)content;
5541                        Object[] spans = spanned.getSpans(partialStartOffset,
5542                                partialEndOffset, ParcelableSpan.class);
5543                        int i = spans.length;
5544                        while (i > 0) {
5545                            i--;
5546                            int j = spanned.getSpanStart(spans[i]);
5547                            if (j < partialStartOffset) partialStartOffset = j;
5548                            j = spanned.getSpanEnd(spans[i]);
5549                            if (j > partialEndOffset) partialEndOffset = j;
5550                        }
5551                    }
5552                    outText.partialStartOffset = partialStartOffset;
5553                    outText.partialEndOffset = partialEndOffset - delta;
5554
5555                    if (partialStartOffset > N) {
5556                        partialStartOffset = N;
5557                    } else if (partialStartOffset < 0) {
5558                        partialStartOffset = 0;
5559                    }
5560                    if (partialEndOffset > N) {
5561                        partialEndOffset = N;
5562                    } else if (partialEndOffset < 0) {
5563                        partialEndOffset = 0;
5564                    }
5565                }
5566                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5567                    outText.text = content.subSequence(partialStartOffset,
5568                            partialEndOffset);
5569                } else {
5570                    outText.text = TextUtils.substring(content, partialStartOffset,
5571                            partialEndOffset);
5572                }
5573            } else {
5574                outText.partialStartOffset = 0;
5575                outText.partialEndOffset = 0;
5576                outText.text = "";
5577            }
5578            outText.flags = 0;
5579            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5580                outText.flags |= ExtractedText.FLAG_SELECTING;
5581            }
5582            if (mSingleLine) {
5583                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5584            }
5585            outText.startOffset = 0;
5586            outText.selectionStart = getSelectionStart();
5587            outText.selectionEnd = getSelectionEnd();
5588            return true;
5589        }
5590        return false;
5591    }
5592
5593    boolean reportExtractedText() {
5594        final InputMethodState ims = mInputMethodState;
5595        if (ims != null) {
5596            final boolean contentChanged = ims.mContentChanged;
5597            if (contentChanged || ims.mSelectionModeChanged) {
5598                ims.mContentChanged = false;
5599                ims.mSelectionModeChanged = false;
5600                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5601                if (req != null) {
5602                    InputMethodManager imm = InputMethodManager.peekInstance();
5603                    if (imm != null) {
5604                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5605                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5606                                + " delta=" + ims.mChangedDelta);
5607                        if (ims.mChangedStart < 0 && !contentChanged) {
5608                            ims.mChangedStart = EXTRACT_NOTHING;
5609                        }
5610                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5611                                ims.mChangedDelta, ims.mTmpExtracted)) {
5612                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5613                                    + ims.mTmpExtracted.partialStartOffset
5614                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5615                                    + ": " + ims.mTmpExtracted.text);
5616                            imm.updateExtractedText(this, req.token,
5617                                    mInputMethodState.mTmpExtracted);
5618                            ims.mChangedStart = EXTRACT_UNKNOWN;
5619                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5620                            ims.mChangedDelta = 0;
5621                            ims.mContentChanged = false;
5622                            return true;
5623                        }
5624                    }
5625                }
5626            }
5627        }
5628        return false;
5629    }
5630
5631    /**
5632     * This is used to remove all style-impacting spans from text before new
5633     * extracted text is being replaced into it, so that we don't have any
5634     * lingering spans applied during the replace.
5635     */
5636    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5637        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5638        int i = spans.length;
5639        while (i > 0) {
5640            i--;
5641            spannable.removeSpan(spans[i]);
5642        }
5643    }
5644
5645    /**
5646     * Apply to this text view the given extracted text, as previously
5647     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5648     */
5649    public void setExtractedText(ExtractedText text) {
5650        Editable content = getEditableText();
5651        if (text.text != null) {
5652            if (content == null) {
5653                setText(text.text, TextView.BufferType.EDITABLE);
5654            } else if (text.partialStartOffset < 0) {
5655                removeParcelableSpans(content, 0, content.length());
5656                content.replace(0, content.length(), text.text);
5657            } else {
5658                final int N = content.length();
5659                int start = text.partialStartOffset;
5660                if (start > N) start = N;
5661                int end = text.partialEndOffset;
5662                if (end > N) end = N;
5663                removeParcelableSpans(content, start, end);
5664                content.replace(start, end, text.text);
5665            }
5666        }
5667
5668        // Now set the selection position...  make sure it is in range, to
5669        // avoid crashes.  If this is a partial update, it is possible that
5670        // the underlying text may have changed, causing us problems here.
5671        // Also we just don't want to trust clients to do the right thing.
5672        Spannable sp = (Spannable)getText();
5673        final int N = sp.length();
5674        int start = text.selectionStart;
5675        if (start < 0) start = 0;
5676        else if (start > N) start = N;
5677        int end = text.selectionEnd;
5678        if (end < 0) end = 0;
5679        else if (end > N) end = N;
5680        Selection.setSelection(sp, start, end);
5681
5682        // Finally, update the selection mode.
5683        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5684            MetaKeyKeyListener.startSelecting(this, sp);
5685        } else {
5686            MetaKeyKeyListener.stopSelecting(this, sp);
5687        }
5688    }
5689
5690    /**
5691     * @hide
5692     */
5693    public void setExtracting(ExtractedTextRequest req) {
5694        if (mInputMethodState != null) {
5695            mInputMethodState.mExtracting = req;
5696        }
5697        // This stops a possible text selection mode. Maybe not intended.
5698        hideControllers();
5699    }
5700
5701    /**
5702     * Called by the framework in response to a text completion from
5703     * the current input method, provided by it calling
5704     * {@link InputConnection#commitCompletion
5705     * InputConnection.commitCompletion()}.  The default implementation does
5706     * nothing; text views that are supporting auto-completion should override
5707     * this to do their desired behavior.
5708     *
5709     * @param text The auto complete text the user has selected.
5710     */
5711    public void onCommitCompletion(CompletionInfo text) {
5712        // intentionally empty
5713    }
5714
5715    /**
5716     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5717     * a dictionnary) from the current input method, provided by it calling
5718     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5719     * implementation flashes the background of the corrected word to provide feedback to the user.
5720     *
5721     * @param info The auto correct info about the text that was corrected.
5722     */
5723    public void onCommitCorrection(CorrectionInfo info) {
5724        if (mCorrectionHighlighter == null) {
5725            mCorrectionHighlighter = new CorrectionHighlighter();
5726        } else {
5727            mCorrectionHighlighter.invalidate(false);
5728        }
5729
5730        mCorrectionHighlighter.highlight(info);
5731    }
5732
5733    private class CorrectionHighlighter {
5734        private final Path mPath = new Path();
5735        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5736        private int mStart, mEnd;
5737        private long mFadingStartTime;
5738        private final static int FADE_OUT_DURATION = 400;
5739
5740        public CorrectionHighlighter() {
5741            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5742            mPaint.setStyle(Paint.Style.FILL);
5743        }
5744
5745        public void highlight(CorrectionInfo info) {
5746            mStart = info.getOffset();
5747            mEnd = mStart + info.getNewText().length();
5748            mFadingStartTime = SystemClock.uptimeMillis();
5749
5750            if (mStart < 0 || mEnd < 0) {
5751                stopAnimation();
5752            }
5753        }
5754
5755        public void draw(Canvas canvas, int cursorOffsetVertical) {
5756            if (updatePath() && updatePaint()) {
5757                if (cursorOffsetVertical != 0) {
5758                    canvas.translate(0, cursorOffsetVertical);
5759                }
5760
5761                canvas.drawPath(mPath, mPaint);
5762
5763                if (cursorOffsetVertical != 0) {
5764                    canvas.translate(0, -cursorOffsetVertical);
5765                }
5766                invalidate(true);
5767            } else {
5768                stopAnimation();
5769                invalidate(false);
5770            }
5771        }
5772
5773        private boolean updatePaint() {
5774            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5775            if (duration > FADE_OUT_DURATION) return false;
5776
5777            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5778            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5779            final int color = (mHighlightColor & 0x00FFFFFF) +
5780                    ((int) (highlightColorAlpha * coef) << 24);
5781            mPaint.setColor(color);
5782            return true;
5783        }
5784
5785        private boolean updatePath() {
5786            final Layout layout = TextView.this.mLayout;
5787            if (layout == null) return false;
5788
5789            // Update in case text is edited while the animation is run
5790            final int length = mText.length();
5791            int start = Math.min(length, mStart);
5792            int end = Math.min(length, mEnd);
5793
5794            mPath.reset();
5795            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5796            return true;
5797        }
5798
5799        private void invalidate(boolean delayed) {
5800            if (TextView.this.mLayout == null) return;
5801
5802            synchronized (sTempRect) {
5803                mPath.computeBounds(sTempRect, false);
5804
5805                int left = getCompoundPaddingLeft();
5806                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5807
5808                if (delayed) {
5809                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5810                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5811                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5812                } else {
5813                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5814                            (int) sTempRect.right, (int) sTempRect.bottom);
5815                }
5816            }
5817        }
5818
5819        private void stopAnimation() {
5820            TextView.this.mCorrectionHighlighter = null;
5821        }
5822    }
5823
5824    public void beginBatchEdit() {
5825        mInBatchEditControllers = true;
5826        final InputMethodState ims = mInputMethodState;
5827        if (ims != null) {
5828            int nesting = ++ims.mBatchEditNesting;
5829            if (nesting == 1) {
5830                ims.mCursorChanged = false;
5831                ims.mChangedDelta = 0;
5832                if (ims.mContentChanged) {
5833                    // We already have a pending change from somewhere else,
5834                    // so turn this into a full update.
5835                    ims.mChangedStart = 0;
5836                    ims.mChangedEnd = mText.length();
5837                } else {
5838                    ims.mChangedStart = EXTRACT_UNKNOWN;
5839                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5840                    ims.mContentChanged = false;
5841                }
5842                onBeginBatchEdit();
5843            }
5844        }
5845    }
5846
5847    public void endBatchEdit() {
5848        mInBatchEditControllers = false;
5849        final InputMethodState ims = mInputMethodState;
5850        if (ims != null) {
5851            int nesting = --ims.mBatchEditNesting;
5852            if (nesting == 0) {
5853                finishBatchEdit(ims);
5854            }
5855        }
5856    }
5857
5858    void ensureEndedBatchEdit() {
5859        final InputMethodState ims = mInputMethodState;
5860        if (ims != null && ims.mBatchEditNesting != 0) {
5861            ims.mBatchEditNesting = 0;
5862            finishBatchEdit(ims);
5863        }
5864    }
5865
5866    void finishBatchEdit(final InputMethodState ims) {
5867        onEndBatchEdit();
5868
5869        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5870            updateAfterEdit();
5871            reportExtractedText();
5872        } else if (ims.mCursorChanged) {
5873            // Cheezy way to get us to report the current cursor location.
5874            invalidateCursor();
5875        }
5876    }
5877
5878    void updateAfterEdit() {
5879        invalidate();
5880        int curs = getSelectionStart();
5881
5882        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5883            registerForPreDraw();
5884        }
5885
5886        if (curs >= 0) {
5887            mHighlightPathBogus = true;
5888            makeBlink();
5889            bringPointIntoView(curs);
5890        }
5891
5892        checkForResize();
5893    }
5894
5895    /**
5896     * Called by the framework in response to a request to begin a batch
5897     * of edit operations through a call to link {@link #beginBatchEdit()}.
5898     */
5899    public void onBeginBatchEdit() {
5900        // intentionally empty
5901    }
5902
5903    /**
5904     * Called by the framework in response to a request to end a batch
5905     * of edit operations through a call to link {@link #endBatchEdit}.
5906     */
5907    public void onEndBatchEdit() {
5908        // intentionally empty
5909    }
5910
5911    /**
5912     * Called by the framework in response to a private command from the
5913     * current method, provided by it calling
5914     * {@link InputConnection#performPrivateCommand
5915     * InputConnection.performPrivateCommand()}.
5916     *
5917     * @param action The action name of the command.
5918     * @param data Any additional data for the command.  This may be null.
5919     * @return Return true if you handled the command, else false.
5920     */
5921    public boolean onPrivateIMECommand(String action, Bundle data) {
5922        return false;
5923    }
5924
5925    private void nullLayouts() {
5926        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5927            mSavedLayout = (BoringLayout) mLayout;
5928        }
5929        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5930            mSavedHintLayout = (BoringLayout) mHintLayout;
5931        }
5932
5933        mLayout = mHintLayout = null;
5934
5935        // Since it depends on the value of mLayout
5936        prepareCursorControllers();
5937    }
5938
5939    /**
5940     * Make a new Layout based on the already-measured size of the view,
5941     * on the assumption that it was measured correctly at some point.
5942     */
5943    private void assumeLayout() {
5944        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5945
5946        if (width < 1) {
5947            width = 0;
5948        }
5949
5950        int physicalWidth = width;
5951
5952        if (mHorizontallyScrolling) {
5953            width = VERY_WIDE;
5954        }
5955
5956        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5957                      physicalWidth, false);
5958    }
5959
5960    @Override
5961    protected void resetResolvedLayoutDirection() {
5962        super.resetResolvedLayoutDirection();
5963
5964        if (mLayoutAlignment != null &&
5965                (mTextAlign == TextAlign.VIEW_START ||
5966                mTextAlign == TextAlign.VIEW_END)) {
5967            mLayoutAlignment = null;
5968        }
5969    }
5970
5971    private Layout.Alignment getLayoutAlignment() {
5972        if (mLayoutAlignment == null) {
5973            Layout.Alignment alignment;
5974            TextAlign textAlign = mTextAlign;
5975            switch (textAlign) {
5976                case INHERIT:
5977                    // fall through to gravity temporarily
5978                    // intention is to inherit value through view hierarchy.
5979                case GRAVITY:
5980                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
5981                        case Gravity.START:
5982                            alignment = Layout.Alignment.ALIGN_NORMAL;
5983                            break;
5984                        case Gravity.END:
5985                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
5986                            break;
5987                        case Gravity.LEFT:
5988                            alignment = Layout.Alignment.ALIGN_LEFT;
5989                            break;
5990                        case Gravity.RIGHT:
5991                            alignment = Layout.Alignment.ALIGN_RIGHT;
5992                            break;
5993                        case Gravity.CENTER_HORIZONTAL:
5994                            alignment = Layout.Alignment.ALIGN_CENTER;
5995                            break;
5996                        default:
5997                            alignment = Layout.Alignment.ALIGN_NORMAL;
5998                            break;
5999                    }
6000                    break;
6001                case TEXT_START:
6002                    alignment = Layout.Alignment.ALIGN_NORMAL;
6003                    break;
6004                case TEXT_END:
6005                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6006                    break;
6007                case CENTER:
6008                    alignment = Layout.Alignment.ALIGN_CENTER;
6009                    break;
6010                case VIEW_START:
6011                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6012                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6013                    break;
6014                case VIEW_END:
6015                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6016                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6017                    break;
6018                default:
6019                    alignment = Layout.Alignment.ALIGN_NORMAL;
6020                    break;
6021            }
6022            mLayoutAlignment = alignment;
6023        }
6024        return mLayoutAlignment;
6025    }
6026
6027    /**
6028     * The width passed in is now the desired layout width,
6029     * not the full view width with padding.
6030     * {@hide}
6031     */
6032    protected void makeNewLayout(int w, int hintWidth,
6033                                 BoringLayout.Metrics boring,
6034                                 BoringLayout.Metrics hintBoring,
6035                                 int ellipsisWidth, boolean bringIntoView) {
6036        stopMarquee();
6037
6038        mHighlightPathBogus = true;
6039
6040        if (w < 0) {
6041            w = 0;
6042        }
6043        if (hintWidth < 0) {
6044            hintWidth = 0;
6045        }
6046
6047        Layout.Alignment alignment = getLayoutAlignment();
6048        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6049
6050        if (mTextDir == null) {
6051            resolveTextDirection();
6052        }
6053        if (mText instanceof Spannable) {
6054            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
6055                    alignment, mTextDir, mSpacingMult,
6056                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
6057                    ellipsisWidth);
6058        } else {
6059            if (boring == UNKNOWN_BORING) {
6060                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6061                if (boring != null) {
6062                    mBoring = boring;
6063                }
6064            }
6065
6066            if (boring != null) {
6067                if (boring.width <= w &&
6068                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
6069                    if (mSavedLayout != null) {
6070                        mLayout = mSavedLayout.
6071                                replaceOrMake(mTransformed, mTextPaint,
6072                                w, alignment, mSpacingMult, mSpacingAdd,
6073                                boring, mIncludePad);
6074                    } else {
6075                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6076                                w, alignment, mSpacingMult, mSpacingAdd,
6077                                boring, mIncludePad);
6078                    }
6079
6080                    mSavedLayout = (BoringLayout) mLayout;
6081                } else if (shouldEllipsize && boring.width <= w) {
6082                    if (mSavedLayout != null) {
6083                        mLayout = mSavedLayout.
6084                                replaceOrMake(mTransformed, mTextPaint,
6085                                w, alignment, mSpacingMult, mSpacingAdd,
6086                                boring, mIncludePad, mEllipsize,
6087                                ellipsisWidth);
6088                    } else {
6089                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6090                                w, alignment, mSpacingMult, mSpacingAdd,
6091                                boring, mIncludePad, mEllipsize,
6092                                ellipsisWidth);
6093                    }
6094                } else if (shouldEllipsize) {
6095                    mLayout = new StaticLayout(mTransformed,
6096                                0, mTransformed.length(),
6097                                mTextPaint, w, alignment, mTextDir, mSpacingMult,
6098                                mSpacingAdd, mIncludePad, mEllipsize,
6099                                ellipsisWidth);
6100                } else {
6101                    mLayout = new StaticLayout(mTransformed, mTextPaint,
6102                            w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6103                            mIncludePad);
6104                }
6105            } else if (shouldEllipsize) {
6106                mLayout = new StaticLayout(mTransformed,
6107                            0, mTransformed.length(),
6108                            mTextPaint, w, alignment, mTextDir, mSpacingMult,
6109                            mSpacingAdd, mIncludePad, mEllipsize,
6110                            ellipsisWidth);
6111            } else {
6112                mLayout = new StaticLayout(mTransformed, mTextPaint,
6113                        w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6114                        mIncludePad);
6115            }
6116        }
6117
6118        shouldEllipsize = mEllipsize != null;
6119        mHintLayout = null;
6120
6121        if (mHint != null) {
6122            if (shouldEllipsize) hintWidth = w;
6123
6124            if (hintBoring == UNKNOWN_BORING) {
6125                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6126                                                   mHintBoring);
6127                if (hintBoring != null) {
6128                    mHintBoring = hintBoring;
6129                }
6130            }
6131
6132            if (hintBoring != null) {
6133                if (hintBoring.width <= hintWidth &&
6134                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6135                    if (mSavedHintLayout != null) {
6136                        mHintLayout = mSavedHintLayout.
6137                                replaceOrMake(mHint, mTextPaint,
6138                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6139                                hintBoring, mIncludePad);
6140                    } else {
6141                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6142                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6143                                hintBoring, mIncludePad);
6144                    }
6145
6146                    mSavedHintLayout = (BoringLayout) mHintLayout;
6147                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6148                    if (mSavedHintLayout != null) {
6149                        mHintLayout = mSavedHintLayout.
6150                                replaceOrMake(mHint, mTextPaint,
6151                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6152                                hintBoring, mIncludePad, mEllipsize,
6153                                ellipsisWidth);
6154                    } else {
6155                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6156                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6157                                hintBoring, mIncludePad, mEllipsize,
6158                                ellipsisWidth);
6159                    }
6160                } else if (shouldEllipsize) {
6161                    mHintLayout = new StaticLayout(mHint,
6162                                0, mHint.length(),
6163                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6164                                mSpacingAdd, mIncludePad, mEllipsize,
6165                                ellipsisWidth);
6166                } else {
6167                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6168                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6169                            mIncludePad);
6170                }
6171            } else if (shouldEllipsize) {
6172                mHintLayout = new StaticLayout(mHint,
6173                            0, mHint.length(),
6174                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6175                            mSpacingAdd, mIncludePad, mEllipsize,
6176                            ellipsisWidth);
6177            } else {
6178                mHintLayout = new StaticLayout(mHint, mTextPaint,
6179                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6180                        mIncludePad);
6181            }
6182        }
6183
6184        if (bringIntoView) {
6185            registerForPreDraw();
6186        }
6187
6188        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6189            if (!compressText(ellipsisWidth)) {
6190                final int height = mLayoutParams.height;
6191                // If the size of the view does not depend on the size of the text, try to
6192                // start the marquee immediately
6193                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6194                    startMarquee();
6195                } else {
6196                    // Defer the start of the marquee until we know our width (see setFrame())
6197                    mRestartMarquee = true;
6198                }
6199            }
6200        }
6201
6202        // CursorControllers need a non-null mLayout
6203        prepareCursorControllers();
6204    }
6205
6206    private boolean compressText(float width) {
6207        if (isHardwareAccelerated()) return false;
6208
6209        // Only compress the text if it hasn't been compressed by the previous pass
6210        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6211                mTextPaint.getTextScaleX() == 1.0f) {
6212            final float textWidth = mLayout.getLineWidth(0);
6213            final float overflow = (textWidth + 1.0f - width) / width;
6214            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6215                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6216                post(new Runnable() {
6217                    public void run() {
6218                        requestLayout();
6219                    }
6220                });
6221                return true;
6222            }
6223        }
6224
6225        return false;
6226    }
6227
6228    private static int desired(Layout layout) {
6229        int n = layout.getLineCount();
6230        CharSequence text = layout.getText();
6231        float max = 0;
6232
6233        // if any line was wrapped, we can't use it.
6234        // but it's ok for the last line not to have a newline
6235
6236        for (int i = 0; i < n - 1; i++) {
6237            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6238                return -1;
6239        }
6240
6241        for (int i = 0; i < n; i++) {
6242            max = Math.max(max, layout.getLineWidth(i));
6243        }
6244
6245        return (int) FloatMath.ceil(max);
6246    }
6247
6248    /**
6249     * Set whether the TextView includes extra top and bottom padding to make
6250     * room for accents that go above the normal ascent and descent.
6251     * The default is true.
6252     *
6253     * @attr ref android.R.styleable#TextView_includeFontPadding
6254     */
6255    public void setIncludeFontPadding(boolean includepad) {
6256        mIncludePad = includepad;
6257
6258        if (mLayout != null) {
6259            nullLayouts();
6260            requestLayout();
6261            invalidate();
6262        }
6263    }
6264
6265    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6266
6267    @Override
6268    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6269        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6270        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6271        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6272        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6273
6274        int width;
6275        int height;
6276
6277        BoringLayout.Metrics boring = UNKNOWN_BORING;
6278        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6279
6280        if (mTextDir == null) {
6281            resolveTextDirection();
6282        }
6283
6284        int des = -1;
6285        boolean fromexisting = false;
6286
6287        if (widthMode == MeasureSpec.EXACTLY) {
6288            // Parent has told us how big to be. So be it.
6289            width = widthSize;
6290        } else {
6291            if (mLayout != null && mEllipsize == null) {
6292                des = desired(mLayout);
6293            }
6294
6295            if (des < 0) {
6296                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6297                if (boring != null) {
6298                    mBoring = boring;
6299                }
6300            } else {
6301                fromexisting = true;
6302            }
6303
6304            if (boring == null || boring == UNKNOWN_BORING) {
6305                if (des < 0) {
6306                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6307                }
6308
6309                width = des;
6310            } else {
6311                width = boring.width;
6312            }
6313
6314            final Drawables dr = mDrawables;
6315            if (dr != null) {
6316                width = Math.max(width, dr.mDrawableWidthTop);
6317                width = Math.max(width, dr.mDrawableWidthBottom);
6318            }
6319
6320            if (mHint != null) {
6321                int hintDes = -1;
6322                int hintWidth;
6323
6324                if (mHintLayout != null && mEllipsize == null) {
6325                    hintDes = desired(mHintLayout);
6326                }
6327
6328                if (hintDes < 0) {
6329                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6330                    if (hintBoring != null) {
6331                        mHintBoring = hintBoring;
6332                    }
6333                }
6334
6335                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6336                    if (hintDes < 0) {
6337                        hintDes = (int) FloatMath.ceil(
6338                                Layout.getDesiredWidth(mHint, mTextPaint));
6339                    }
6340
6341                    hintWidth = hintDes;
6342                } else {
6343                    hintWidth = hintBoring.width;
6344                }
6345
6346                if (hintWidth > width) {
6347                    width = hintWidth;
6348                }
6349            }
6350
6351            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6352
6353            if (mMaxWidthMode == EMS) {
6354                width = Math.min(width, mMaxWidth * getLineHeight());
6355            } else {
6356                width = Math.min(width, mMaxWidth);
6357            }
6358
6359            if (mMinWidthMode == EMS) {
6360                width = Math.max(width, mMinWidth * getLineHeight());
6361            } else {
6362                width = Math.max(width, mMinWidth);
6363            }
6364
6365            // Check against our minimum width
6366            width = Math.max(width, getSuggestedMinimumWidth());
6367
6368            if (widthMode == MeasureSpec.AT_MOST) {
6369                width = Math.min(widthSize, width);
6370            }
6371        }
6372
6373        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6374        int unpaddedWidth = want;
6375
6376        if (mHorizontallyScrolling) want = VERY_WIDE;
6377
6378        int hintWant = want;
6379        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
6380
6381        if (mLayout == null) {
6382            makeNewLayout(want, hintWant, boring, hintBoring,
6383                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6384        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
6385                   (mLayout.getEllipsizedWidth() !=
6386                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6387            if (mHint == null && mEllipsize == null &&
6388                    want > mLayout.getWidth() &&
6389                    (mLayout instanceof BoringLayout ||
6390                            (fromexisting && des >= 0 && des <= want))) {
6391                mLayout.increaseWidthTo(want);
6392            } else {
6393                makeNewLayout(want, hintWant, boring, hintBoring,
6394                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6395            }
6396        } else {
6397            // Width has not changed.
6398        }
6399
6400        if (heightMode == MeasureSpec.EXACTLY) {
6401            // Parent has told us how big to be. So be it.
6402            height = heightSize;
6403            mDesiredHeightAtMeasure = -1;
6404        } else {
6405            int desired = getDesiredHeight();
6406
6407            height = desired;
6408            mDesiredHeightAtMeasure = desired;
6409
6410            if (heightMode == MeasureSpec.AT_MOST) {
6411                height = Math.min(desired, heightSize);
6412            }
6413        }
6414
6415        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6416        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6417            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6418        }
6419
6420        /*
6421         * We didn't let makeNewLayout() register to bring the cursor into view,
6422         * so do it here if there is any possibility that it is needed.
6423         */
6424        if (mMovement != null ||
6425            mLayout.getWidth() > unpaddedWidth ||
6426            mLayout.getHeight() > unpaddedHeight) {
6427            registerForPreDraw();
6428        } else {
6429            scrollTo(0, 0);
6430        }
6431
6432        setMeasuredDimension(width, height);
6433    }
6434
6435    private int getDesiredHeight() {
6436        return Math.max(
6437                getDesiredHeight(mLayout, true),
6438                getDesiredHeight(mHintLayout, mEllipsize != null));
6439    }
6440
6441    private int getDesiredHeight(Layout layout, boolean cap) {
6442        if (layout == null) {
6443            return 0;
6444        }
6445
6446        int linecount = layout.getLineCount();
6447        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6448        int desired = layout.getLineTop(linecount);
6449
6450        final Drawables dr = mDrawables;
6451        if (dr != null) {
6452            desired = Math.max(desired, dr.mDrawableHeightLeft);
6453            desired = Math.max(desired, dr.mDrawableHeightRight);
6454        }
6455
6456        desired += pad;
6457        layout.setMaximumVisibleLineCount(0);
6458
6459        if (mMaxMode == LINES) {
6460            /*
6461             * Don't cap the hint to a certain number of lines.
6462             * (Do cap it, though, if we have a maximum pixel height.)
6463             */
6464            if (cap) {
6465                if (linecount > mMaximum) {
6466                    layout.setMaximumVisibleLineCount(mMaximum);
6467                    desired = layout.getLineTop(mMaximum);
6468
6469                    if (dr != null) {
6470                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6471                        desired = Math.max(desired, dr.mDrawableHeightRight);
6472                    }
6473
6474                    desired += pad;
6475                    linecount = mMaximum;
6476                }
6477            }
6478        } else {
6479            desired = Math.min(desired, mMaximum);
6480        }
6481
6482        if (mMinMode == LINES) {
6483            if (linecount < mMinimum) {
6484                desired += getLineHeight() * (mMinimum - linecount);
6485            }
6486        } else {
6487            desired = Math.max(desired, mMinimum);
6488        }
6489
6490        // Check against our minimum height
6491        desired = Math.max(desired, getSuggestedMinimumHeight());
6492
6493        return desired;
6494    }
6495
6496    /**
6497     * Check whether a change to the existing text layout requires a
6498     * new view layout.
6499     */
6500    private void checkForResize() {
6501        boolean sizeChanged = false;
6502
6503        if (mLayout != null) {
6504            // Check if our width changed
6505            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6506                sizeChanged = true;
6507                invalidate();
6508            }
6509
6510            // Check if our height changed
6511            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6512                int desiredHeight = getDesiredHeight();
6513
6514                if (desiredHeight != this.getHeight()) {
6515                    sizeChanged = true;
6516                }
6517            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6518                if (mDesiredHeightAtMeasure >= 0) {
6519                    int desiredHeight = getDesiredHeight();
6520
6521                    if (desiredHeight != mDesiredHeightAtMeasure) {
6522                        sizeChanged = true;
6523                    }
6524                }
6525            }
6526        }
6527
6528        if (sizeChanged) {
6529            requestLayout();
6530            // caller will have already invalidated
6531        }
6532    }
6533
6534    /**
6535     * Check whether entirely new text requires a new view layout
6536     * or merely a new text layout.
6537     */
6538    private void checkForRelayout() {
6539        // If we have a fixed width, we can just swap in a new text layout
6540        // if the text height stays the same or if the view height is fixed.
6541
6542        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6543                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6544                (mHint == null || mHintLayout != null) &&
6545                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6546            // Static width, so try making a new text layout.
6547
6548            int oldht = mLayout.getHeight();
6549            int want = mLayout.getWidth();
6550            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6551
6552            /*
6553             * No need to bring the text into view, since the size is not
6554             * changing (unless we do the requestLayout(), in which case it
6555             * will happen at measure).
6556             */
6557            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6558                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6559                          false);
6560
6561            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6562                // In a fixed-height view, so use our new text layout.
6563                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6564                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6565                    invalidate();
6566                    return;
6567                }
6568
6569                // Dynamic height, but height has stayed the same,
6570                // so use our new text layout.
6571                if (mLayout.getHeight() == oldht &&
6572                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6573                    invalidate();
6574                    return;
6575                }
6576            }
6577
6578            // We lose: the height has changed and we have a dynamic height.
6579            // Request a new view layout using our new text layout.
6580            requestLayout();
6581            invalidate();
6582        } else {
6583            // Dynamic width, so we have no choice but to request a new
6584            // view layout with a new text layout.
6585
6586            nullLayouts();
6587            requestLayout();
6588            invalidate();
6589        }
6590    }
6591
6592    /**
6593     * Returns true if anything changed.
6594     */
6595    private boolean bringTextIntoView() {
6596        int line = 0;
6597        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6598            line = mLayout.getLineCount() - 1;
6599        }
6600
6601        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6602        int dir = mLayout.getParagraphDirection(line);
6603        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6604        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6605        int ht = mLayout.getHeight();
6606
6607        int scrollx, scrolly;
6608
6609        // Convert to left, center, or right alignment.
6610        if (a == Layout.Alignment.ALIGN_NORMAL) {
6611            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6612                Layout.Alignment.ALIGN_RIGHT;
6613        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6614            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6615                Layout.Alignment.ALIGN_LEFT;
6616        }
6617
6618        if (a == Layout.Alignment.ALIGN_CENTER) {
6619            /*
6620             * Keep centered if possible, or, if it is too wide to fit,
6621             * keep leading edge in view.
6622             */
6623
6624            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6625            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6626
6627            if (right - left < hspace) {
6628                scrollx = (right + left) / 2 - hspace / 2;
6629            } else {
6630                if (dir < 0) {
6631                    scrollx = right - hspace;
6632                } else {
6633                    scrollx = left;
6634                }
6635            }
6636        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6637            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6638            scrollx = right - hspace;
6639        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6640            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6641        }
6642
6643        if (ht < vspace) {
6644            scrolly = 0;
6645        } else {
6646            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6647                scrolly = ht - vspace;
6648            } else {
6649                scrolly = 0;
6650            }
6651        }
6652
6653        if (scrollx != mScrollX || scrolly != mScrollY) {
6654            scrollTo(scrollx, scrolly);
6655            return true;
6656        } else {
6657            return false;
6658        }
6659    }
6660
6661    /**
6662     * Move the point, specified by the offset, into the view if it is needed.
6663     * This has to be called after layout. Returns true if anything changed.
6664     */
6665    public boolean bringPointIntoView(int offset) {
6666        boolean changed = false;
6667
6668        if (mLayout == null) return changed;
6669
6670        int line = mLayout.getLineForOffset(offset);
6671
6672        // FIXME: Is it okay to truncate this, or should we round?
6673        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6674        final int top = mLayout.getLineTop(line);
6675        final int bottom = mLayout.getLineTop(line + 1);
6676
6677        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6678        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6679        int ht = mLayout.getHeight();
6680
6681        int grav;
6682
6683        switch (mLayout.getParagraphAlignment(line)) {
6684            case ALIGN_LEFT:
6685                grav = 1;
6686                break;
6687            case ALIGN_RIGHT:
6688                grav = -1;
6689                break;
6690            case ALIGN_NORMAL:
6691                grav = mLayout.getParagraphDirection(line);
6692                break;
6693            case ALIGN_OPPOSITE:
6694                grav = -mLayout.getParagraphDirection(line);
6695                break;
6696            case ALIGN_CENTER:
6697            default:
6698                grav = 0;
6699                break;
6700        }
6701
6702        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6703        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6704
6705        int hslack = (bottom - top) / 2;
6706        int vslack = hslack;
6707
6708        if (vslack > vspace / 4)
6709            vslack = vspace / 4;
6710        if (hslack > hspace / 4)
6711            hslack = hspace / 4;
6712
6713        int hs = mScrollX;
6714        int vs = mScrollY;
6715
6716        if (top - vs < vslack)
6717            vs = top - vslack;
6718        if (bottom - vs > vspace - vslack)
6719            vs = bottom - (vspace - vslack);
6720        if (ht - vs < vspace)
6721            vs = ht - vspace;
6722        if (0 - vs > 0)
6723            vs = 0;
6724
6725        if (grav != 0) {
6726            if (x - hs < hslack) {
6727                hs = x - hslack;
6728            }
6729            if (x - hs > hspace - hslack) {
6730                hs = x - (hspace - hslack);
6731            }
6732        }
6733
6734        if (grav < 0) {
6735            if (left - hs > 0)
6736                hs = left;
6737            if (right - hs < hspace)
6738                hs = right - hspace;
6739        } else if (grav > 0) {
6740            if (right - hs < hspace)
6741                hs = right - hspace;
6742            if (left - hs > 0)
6743                hs = left;
6744        } else /* grav == 0 */ {
6745            if (right - left <= hspace) {
6746                /*
6747                 * If the entire text fits, center it exactly.
6748                 */
6749                hs = left - (hspace - (right - left)) / 2;
6750            } else if (x > right - hslack) {
6751                /*
6752                 * If we are near the right edge, keep the right edge
6753                 * at the edge of the view.
6754                 */
6755                hs = right - hspace;
6756            } else if (x < left + hslack) {
6757                /*
6758                 * If we are near the left edge, keep the left edge
6759                 * at the edge of the view.
6760                 */
6761                hs = left;
6762            } else if (left > hs) {
6763                /*
6764                 * Is there whitespace visible at the left?  Fix it if so.
6765                 */
6766                hs = left;
6767            } else if (right < hs + hspace) {
6768                /*
6769                 * Is there whitespace visible at the right?  Fix it if so.
6770                 */
6771                hs = right - hspace;
6772            } else {
6773                /*
6774                 * Otherwise, float as needed.
6775                 */
6776                if (x - hs < hslack) {
6777                    hs = x - hslack;
6778                }
6779                if (x - hs > hspace - hslack) {
6780                    hs = x - (hspace - hslack);
6781                }
6782            }
6783        }
6784
6785        if (hs != mScrollX || vs != mScrollY) {
6786            if (mScroller == null) {
6787                scrollTo(hs, vs);
6788            } else {
6789                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6790                int dx = hs - mScrollX;
6791                int dy = vs - mScrollY;
6792
6793                if (duration > ANIMATED_SCROLL_GAP) {
6794                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6795                    awakenScrollBars(mScroller.getDuration());
6796                    invalidate();
6797                } else {
6798                    if (!mScroller.isFinished()) {
6799                        mScroller.abortAnimation();
6800                    }
6801
6802                    scrollBy(dx, dy);
6803                }
6804
6805                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6806            }
6807
6808            changed = true;
6809        }
6810
6811        if (isFocused()) {
6812            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6813            // requestRectangleOnScreen() is in terms of content coordinates.
6814
6815            if (mTempRect == null) mTempRect = new Rect();
6816            mTempRect.set(x, top, x + 1, bottom);
6817            getInterestingRect(mTempRect, line);
6818            mTempRect.offset(mScrollX, mScrollY);
6819
6820            if (requestRectangleOnScreen(mTempRect)) {
6821                changed = true;
6822            }
6823        }
6824
6825        return changed;
6826    }
6827
6828    /**
6829     * Move the cursor, if needed, so that it is at an offset that is visible
6830     * to the user.  This will not move the cursor if it represents more than
6831     * one character (a selection range).  This will only work if the
6832     * TextView contains spannable text; otherwise it will do nothing.
6833     *
6834     * @return True if the cursor was actually moved, false otherwise.
6835     */
6836    public boolean moveCursorToVisibleOffset() {
6837        if (!(mText instanceof Spannable)) {
6838            return false;
6839        }
6840        int start = getSelectionStart();
6841        int end = getSelectionEnd();
6842        if (start != end) {
6843            return false;
6844        }
6845
6846        // First: make sure the line is visible on screen:
6847
6848        int line = mLayout.getLineForOffset(start);
6849
6850        final int top = mLayout.getLineTop(line);
6851        final int bottom = mLayout.getLineTop(line + 1);
6852        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6853        int vslack = (bottom - top) / 2;
6854        if (vslack > vspace / 4)
6855            vslack = vspace / 4;
6856        final int vs = mScrollY;
6857
6858        if (top < (vs+vslack)) {
6859            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6860        } else if (bottom > (vspace+vs-vslack)) {
6861            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6862        }
6863
6864        // Next: make sure the character is visible on screen:
6865
6866        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6867        final int hs = mScrollX;
6868        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6869        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6870
6871        // line might contain bidirectional text
6872        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6873        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6874
6875        int newStart = start;
6876        if (newStart < lowChar) {
6877            newStart = lowChar;
6878        } else if (newStart > highChar) {
6879            newStart = highChar;
6880        }
6881
6882        if (newStart != start) {
6883            Selection.setSelection((Spannable)mText, newStart);
6884            return true;
6885        }
6886
6887        return false;
6888    }
6889
6890    @Override
6891    public void computeScroll() {
6892        if (mScroller != null) {
6893            if (mScroller.computeScrollOffset()) {
6894                mScrollX = mScroller.getCurrX();
6895                mScrollY = mScroller.getCurrY();
6896                invalidateParentCaches();
6897                postInvalidate();  // So we draw again
6898            }
6899        }
6900    }
6901
6902    private void getInterestingRect(Rect r, int line) {
6903        convertFromViewportToContentCoordinates(r);
6904
6905        // Rectangle can can be expanded on first and last line to take
6906        // padding into account.
6907        // TODO Take left/right padding into account too?
6908        if (line == 0) r.top -= getExtendedPaddingTop();
6909        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6910    }
6911
6912    private void convertFromViewportToContentCoordinates(Rect r) {
6913        final int horizontalOffset = viewportToContentHorizontalOffset();
6914        r.left += horizontalOffset;
6915        r.right += horizontalOffset;
6916
6917        final int verticalOffset = viewportToContentVerticalOffset();
6918        r.top += verticalOffset;
6919        r.bottom += verticalOffset;
6920    }
6921
6922    private int viewportToContentHorizontalOffset() {
6923        return getCompoundPaddingLeft() - mScrollX;
6924    }
6925
6926    private int viewportToContentVerticalOffset() {
6927        int offset = getExtendedPaddingTop() - mScrollY;
6928        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6929            offset += getVerticalOffset(false);
6930        }
6931        return offset;
6932    }
6933
6934    @Override
6935    public void debug(int depth) {
6936        super.debug(depth);
6937
6938        String output = debugIndent(depth);
6939        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6940                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6941                + "} ";
6942
6943        if (mText != null) {
6944
6945            output += "mText=\"" + mText + "\" ";
6946            if (mLayout != null) {
6947                output += "mLayout width=" + mLayout.getWidth()
6948                        + " height=" + mLayout.getHeight();
6949            }
6950        } else {
6951            output += "mText=NULL";
6952        }
6953        Log.d(VIEW_LOG_TAG, output);
6954    }
6955
6956    /**
6957     * Convenience for {@link Selection#getSelectionStart}.
6958     */
6959    @ViewDebug.ExportedProperty(category = "text")
6960    public int getSelectionStart() {
6961        return Selection.getSelectionStart(getText());
6962    }
6963
6964    /**
6965     * Convenience for {@link Selection#getSelectionEnd}.
6966     */
6967    @ViewDebug.ExportedProperty(category = "text")
6968    public int getSelectionEnd() {
6969        return Selection.getSelectionEnd(getText());
6970    }
6971
6972    /**
6973     * Return true iff there is a selection inside this text view.
6974     */
6975    public boolean hasSelection() {
6976        final int selectionStart = getSelectionStart();
6977        final int selectionEnd = getSelectionEnd();
6978
6979        return selectionStart >= 0 && selectionStart != selectionEnd;
6980    }
6981
6982    /**
6983     * Sets the properties of this field (lines, horizontally scrolling,
6984     * transformation method) to be for a single-line input.
6985     *
6986     * @attr ref android.R.styleable#TextView_singleLine
6987     */
6988    public void setSingleLine() {
6989        setSingleLine(true);
6990    }
6991
6992    /**
6993     * Sets the properties of this field to transform input to ALL CAPS
6994     * display. This may use a "small caps" formatting if available.
6995     * This setting will be ignored if this field is editable or selectable.
6996     *
6997     * This call replaces the current transformation method. Disabling this
6998     * will not necessarily restore the previous behavior from before this
6999     * was enabled.
7000     *
7001     * @see #setTransformationMethod(TransformationMethod)
7002     * @attr ref android.R.styleable#TextView_textAllCaps
7003     */
7004    public void setAllCaps(boolean allCaps) {
7005        if (allCaps) {
7006            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7007        } else {
7008            setTransformationMethod(null);
7009        }
7010    }
7011
7012    /**
7013     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7014     * transformation method) to be for a single-line input; if false, restores these to the default
7015     * conditions.
7016     *
7017     * Note that the default conditions are not necessarily those that were in effect prior this
7018     * method, and you may want to reset these properties to your custom values.
7019     *
7020     * @attr ref android.R.styleable#TextView_singleLine
7021     */
7022    @android.view.RemotableViewMethod
7023    public void setSingleLine(boolean singleLine) {
7024        // Could be used, but may break backward compatibility.
7025        // if (mSingleLine == singleLine) return;
7026        setInputTypeSingleLine(singleLine);
7027        applySingleLine(singleLine, true, true);
7028    }
7029
7030    /**
7031     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7032     * @param singleLine
7033     */
7034    private void setInputTypeSingleLine(boolean singleLine) {
7035        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7036            if (singleLine) {
7037                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7038            } else {
7039                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7040            }
7041        }
7042    }
7043
7044    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7045            boolean changeMaxLines) {
7046        mSingleLine = singleLine;
7047        if (singleLine) {
7048            setLines(1);
7049            setHorizontallyScrolling(true);
7050            if (applyTransformation) {
7051                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7052            }
7053        } else {
7054            if (changeMaxLines) {
7055                setMaxLines(Integer.MAX_VALUE);
7056            }
7057            setHorizontallyScrolling(false);
7058            if (applyTransformation) {
7059                setTransformationMethod(null);
7060            }
7061        }
7062    }
7063
7064    /**
7065     * Causes words in the text that are longer than the view is wide
7066     * to be ellipsized instead of broken in the middle.  You may also
7067     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7068     * to constrain the text to a single line.  Use <code>null</code>
7069     * to turn off ellipsizing.
7070     *
7071     * @attr ref android.R.styleable#TextView_ellipsize
7072     */
7073    public void setEllipsize(TextUtils.TruncateAt where) {
7074        mEllipsize = where;
7075
7076        if (mLayout != null) {
7077            nullLayouts();
7078            requestLayout();
7079            invalidate();
7080        }
7081    }
7082
7083    /**
7084     * Sets how many times to repeat the marquee animation. Only applied if the
7085     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7086     *
7087     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7088     */
7089    public void setMarqueeRepeatLimit(int marqueeLimit) {
7090        mMarqueeRepeatLimit = marqueeLimit;
7091    }
7092
7093    /**
7094     * Returns where, if anywhere, words that are longer than the view
7095     * is wide should be ellipsized.
7096     */
7097    @ViewDebug.ExportedProperty
7098    public TextUtils.TruncateAt getEllipsize() {
7099        return mEllipsize;
7100    }
7101
7102    /**
7103     * Set the TextView so that when it takes focus, all the text is
7104     * selected.
7105     *
7106     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7107     */
7108    @android.view.RemotableViewMethod
7109    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7110        mSelectAllOnFocus = selectAllOnFocus;
7111
7112        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7113            setText(mText, BufferType.SPANNABLE);
7114        }
7115    }
7116
7117    /**
7118     * Set whether the cursor is visible.  The default is true.
7119     *
7120     * @attr ref android.R.styleable#TextView_cursorVisible
7121     */
7122    @android.view.RemotableViewMethod
7123    public void setCursorVisible(boolean visible) {
7124        if (mCursorVisible != visible) {
7125            mCursorVisible = visible;
7126            invalidate();
7127
7128            makeBlink();
7129
7130            // InsertionPointCursorController depends on mCursorVisible
7131            prepareCursorControllers();
7132        }
7133    }
7134
7135    private boolean isCursorVisible() {
7136        return mCursorVisible && isTextEditable();
7137    }
7138
7139    private boolean canMarquee() {
7140        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7141        return width > 0 && mLayout.getLineWidth(0) > width;
7142    }
7143
7144    private void startMarquee() {
7145        // Do not ellipsize EditText
7146        if (mInput != null) return;
7147
7148        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7149            return;
7150        }
7151
7152        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7153                getLineCount() == 1 && canMarquee()) {
7154
7155            if (mMarquee == null) mMarquee = new Marquee(this);
7156            mMarquee.start(mMarqueeRepeatLimit);
7157        }
7158    }
7159
7160    private void stopMarquee() {
7161        if (mMarquee != null && !mMarquee.isStopped()) {
7162            mMarquee.stop();
7163        }
7164    }
7165
7166    private void startStopMarquee(boolean start) {
7167        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7168            if (start) {
7169                startMarquee();
7170            } else {
7171                stopMarquee();
7172            }
7173        }
7174    }
7175
7176    private static final class Marquee extends Handler {
7177        // TODO: Add an option to configure this
7178        private static final float MARQUEE_DELTA_MAX = 0.07f;
7179        private static final int MARQUEE_DELAY = 1200;
7180        private static final int MARQUEE_RESTART_DELAY = 1200;
7181        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7182        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7183
7184        private static final byte MARQUEE_STOPPED = 0x0;
7185        private static final byte MARQUEE_STARTING = 0x1;
7186        private static final byte MARQUEE_RUNNING = 0x2;
7187
7188        private static final int MESSAGE_START = 0x1;
7189        private static final int MESSAGE_TICK = 0x2;
7190        private static final int MESSAGE_RESTART = 0x3;
7191
7192        private final WeakReference<TextView> mView;
7193
7194        private byte mStatus = MARQUEE_STOPPED;
7195        private final float mScrollUnit;
7196        private float mMaxScroll;
7197        float mMaxFadeScroll;
7198        private float mGhostStart;
7199        private float mGhostOffset;
7200        private float mFadeStop;
7201        private int mRepeatLimit;
7202
7203        float mScroll;
7204
7205        Marquee(TextView v) {
7206            final float density = v.getContext().getResources().getDisplayMetrics().density;
7207            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7208            mView = new WeakReference<TextView>(v);
7209        }
7210
7211        @Override
7212        public void handleMessage(Message msg) {
7213            switch (msg.what) {
7214                case MESSAGE_START:
7215                    mStatus = MARQUEE_RUNNING;
7216                    tick();
7217                    break;
7218                case MESSAGE_TICK:
7219                    tick();
7220                    break;
7221                case MESSAGE_RESTART:
7222                    if (mStatus == MARQUEE_RUNNING) {
7223                        if (mRepeatLimit >= 0) {
7224                            mRepeatLimit--;
7225                        }
7226                        start(mRepeatLimit);
7227                    }
7228                    break;
7229            }
7230        }
7231
7232        void tick() {
7233            if (mStatus != MARQUEE_RUNNING) {
7234                return;
7235            }
7236
7237            removeMessages(MESSAGE_TICK);
7238
7239            final TextView textView = mView.get();
7240            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7241                mScroll += mScrollUnit;
7242                if (mScroll > mMaxScroll) {
7243                    mScroll = mMaxScroll;
7244                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7245                } else {
7246                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7247                }
7248                textView.invalidate();
7249            }
7250        }
7251
7252        void stop() {
7253            mStatus = MARQUEE_STOPPED;
7254            removeMessages(MESSAGE_START);
7255            removeMessages(MESSAGE_RESTART);
7256            removeMessages(MESSAGE_TICK);
7257            resetScroll();
7258        }
7259
7260        private void resetScroll() {
7261            mScroll = 0.0f;
7262            final TextView textView = mView.get();
7263            if (textView != null) textView.invalidate();
7264        }
7265
7266        void start(int repeatLimit) {
7267            if (repeatLimit == 0) {
7268                stop();
7269                return;
7270            }
7271            mRepeatLimit = repeatLimit;
7272            final TextView textView = mView.get();
7273            if (textView != null && textView.mLayout != null) {
7274                mStatus = MARQUEE_STARTING;
7275                mScroll = 0.0f;
7276                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7277                        textView.getCompoundPaddingRight();
7278                final float lineWidth = textView.mLayout.getLineWidth(0);
7279                final float gap = textWidth / 3.0f;
7280                mGhostStart = lineWidth - textWidth + gap;
7281                mMaxScroll = mGhostStart + textWidth;
7282                mGhostOffset = lineWidth + gap;
7283                mFadeStop = lineWidth + textWidth / 6.0f;
7284                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7285
7286                textView.invalidate();
7287                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7288            }
7289        }
7290
7291        float getGhostOffset() {
7292            return mGhostOffset;
7293        }
7294
7295        boolean shouldDrawLeftFade() {
7296            return mScroll <= mFadeStop;
7297        }
7298
7299        boolean shouldDrawGhost() {
7300            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7301        }
7302
7303        boolean isRunning() {
7304            return mStatus == MARQUEE_RUNNING;
7305        }
7306
7307        boolean isStopped() {
7308            return mStatus == MARQUEE_STOPPED;
7309        }
7310    }
7311
7312    /**
7313     * This method is called when the text is changed, in case any subclasses
7314     * would like to know.
7315     *
7316     * Within <code>text</code>, the <code>lengthAfter</code> characters
7317     * beginning at <code>start</code> have just replaced old text that had
7318     * length <code>lengthBefore</code>. It is an error to attempt to make
7319     * changes to <code>text</code> from this callback.
7320     *
7321     * @param text The text the TextView is displaying
7322     * @param start The offset of the start of the range of the text that was
7323     * modified
7324     * @param lengthBefore The length of the former text that has been replaced
7325     * @param lengthAfter The length of the replacement modified text
7326     */
7327    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7328        // intentionally empty
7329    }
7330
7331    /**
7332     * This method is called when the selection has changed, in case any
7333     * subclasses would like to know.
7334     *
7335     * @param selStart The new selection start location.
7336     * @param selEnd The new selection end location.
7337     */
7338    protected void onSelectionChanged(int selStart, int selEnd) {
7339        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7340    }
7341
7342    /**
7343     * Adds a TextWatcher to the list of those whose methods are called
7344     * whenever this TextView's text changes.
7345     * <p>
7346     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7347     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7348     * if there are any text changed listeners forces the buffer type to
7349     * Editable if it would not otherwise be and does call this method.
7350     */
7351    public void addTextChangedListener(TextWatcher watcher) {
7352        if (mListeners == null) {
7353            mListeners = new ArrayList<TextWatcher>();
7354        }
7355
7356        mListeners.add(watcher);
7357    }
7358
7359    /**
7360     * Removes the specified TextWatcher from the list of those whose
7361     * methods are called
7362     * whenever this TextView's text changes.
7363     */
7364    public void removeTextChangedListener(TextWatcher watcher) {
7365        if (mListeners != null) {
7366            int i = mListeners.indexOf(watcher);
7367
7368            if (i >= 0) {
7369                mListeners.remove(i);
7370            }
7371        }
7372    }
7373
7374    private void sendBeforeTextChanged(CharSequence text, int start, int before,
7375                                   int after) {
7376        if (mListeners != null) {
7377            final ArrayList<TextWatcher> list = mListeners;
7378            final int count = list.size();
7379            for (int i = 0; i < count; i++) {
7380                list.get(i).beforeTextChanged(text, start, before, after);
7381            }
7382        }
7383    }
7384
7385    /**
7386     * Not private so it can be called from an inner class without going
7387     * through a thunk.
7388     */
7389    void sendOnTextChanged(CharSequence text, int start, int before,
7390                                   int after) {
7391        if (mListeners != null) {
7392            final ArrayList<TextWatcher> list = mListeners;
7393            final int count = list.size();
7394            for (int i = 0; i < count; i++) {
7395                list.get(i).onTextChanged(text, start, before, after);
7396            }
7397        }
7398    }
7399
7400    /**
7401     * Not private so it can be called from an inner class without going
7402     * through a thunk.
7403     */
7404    void sendAfterTextChanged(Editable text) {
7405        if (mListeners != null) {
7406            final ArrayList<TextWatcher> list = mListeners;
7407            final int count = list.size();
7408            for (int i = 0; i < count; i++) {
7409                list.get(i).afterTextChanged(text);
7410            }
7411        }
7412    }
7413
7414    /**
7415     * Not private so it can be called from an inner class without going
7416     * through a thunk.
7417     */
7418    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7419        final InputMethodState ims = mInputMethodState;
7420        if (ims == null || ims.mBatchEditNesting == 0) {
7421            updateAfterEdit();
7422        }
7423        if (ims != null) {
7424            ims.mContentChanged = true;
7425            if (ims.mChangedStart < 0) {
7426                ims.mChangedStart = start;
7427                ims.mChangedEnd = start+before;
7428            } else {
7429                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7430                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7431            }
7432            ims.mChangedDelta += after-before;
7433        }
7434
7435        sendOnTextChanged(buffer, start, before, after);
7436        onTextChanged(buffer, start, before, after);
7437
7438        // Hide the controllers if the amount of content changed
7439        if (before != after) {
7440            hideControllers();
7441        }
7442    }
7443
7444    /**
7445     * Not private so it can be called from an inner class without going
7446     * through a thunk.
7447     */
7448    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7449        // XXX Make the start and end move together if this ends up
7450        // spending too much time invalidating.
7451
7452        boolean selChanged = false;
7453        int newSelStart=-1, newSelEnd=-1;
7454
7455        final InputMethodState ims = mInputMethodState;
7456
7457        if (what == Selection.SELECTION_END) {
7458            mHighlightPathBogus = true;
7459            selChanged = true;
7460            newSelEnd = newStart;
7461
7462            if (!isFocused()) {
7463                mSelectionMoved = true;
7464            }
7465
7466            if (oldStart >= 0 || newStart >= 0) {
7467                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7468                registerForPreDraw();
7469                makeBlink();
7470            }
7471        }
7472
7473        if (what == Selection.SELECTION_START) {
7474            mHighlightPathBogus = true;
7475            selChanged = true;
7476            newSelStart = newStart;
7477
7478            if (!isFocused()) {
7479                mSelectionMoved = true;
7480            }
7481
7482            if (oldStart >= 0 || newStart >= 0) {
7483                int end = Selection.getSelectionEnd(buf);
7484                invalidateCursor(end, oldStart, newStart);
7485            }
7486        }
7487
7488        if (selChanged) {
7489            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7490                if (newSelStart < 0) {
7491                    newSelStart = Selection.getSelectionStart(buf);
7492                }
7493                if (newSelEnd < 0) {
7494                    newSelEnd = Selection.getSelectionEnd(buf);
7495                }
7496                onSelectionChanged(newSelStart, newSelEnd);
7497            }
7498        }
7499
7500        if (what instanceof UpdateAppearance ||
7501            what instanceof ParagraphStyle) {
7502            if (ims == null || ims.mBatchEditNesting == 0) {
7503                invalidate();
7504                mHighlightPathBogus = true;
7505                checkForResize();
7506            } else {
7507                ims.mContentChanged = true;
7508            }
7509        }
7510
7511        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7512            mHighlightPathBogus = true;
7513            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7514                ims.mSelectionModeChanged = true;
7515            }
7516
7517            if (Selection.getSelectionStart(buf) >= 0) {
7518                if (ims == null || ims.mBatchEditNesting == 0) {
7519                    invalidateCursor();
7520                } else {
7521                    ims.mCursorChanged = true;
7522                }
7523            }
7524        }
7525
7526        if (what instanceof ParcelableSpan) {
7527            // If this is a span that can be sent to a remote process,
7528            // the current extract editor would be interested in it.
7529            if (ims != null && ims.mExtracting != null) {
7530                if (ims.mBatchEditNesting != 0) {
7531                    if (oldStart >= 0) {
7532                        if (ims.mChangedStart > oldStart) {
7533                            ims.mChangedStart = oldStart;
7534                        }
7535                        if (ims.mChangedStart > oldEnd) {
7536                            ims.mChangedStart = oldEnd;
7537                        }
7538                    }
7539                    if (newStart >= 0) {
7540                        if (ims.mChangedStart > newStart) {
7541                            ims.mChangedStart = newStart;
7542                        }
7543                        if (ims.mChangedStart > newEnd) {
7544                            ims.mChangedStart = newEnd;
7545                        }
7546                    }
7547                } else {
7548                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7549                            + oldStart + "-" + oldEnd + ","
7550                            + newStart + "-" + newEnd + what);
7551                    ims.mContentChanged = true;
7552                }
7553            }
7554        }
7555    }
7556
7557    private class ChangeWatcher
7558    implements TextWatcher, SpanWatcher {
7559
7560        private CharSequence mBeforeText;
7561
7562        public void beforeTextChanged(CharSequence buffer, int start,
7563                                      int before, int after) {
7564            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7565                    + " before=" + before + " after=" + after + ": " + buffer);
7566
7567            if (AccessibilityManager.getInstance(mContext).isEnabled()
7568                    && !isPasswordInputType(mInputType)
7569                    && !hasPasswordTransformationMethod()) {
7570                mBeforeText = buffer.toString();
7571            }
7572
7573            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7574        }
7575
7576        public void onTextChanged(CharSequence buffer, int start,
7577                                  int before, int after) {
7578            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7579                    + " before=" + before + " after=" + after + ": " + buffer);
7580            TextView.this.handleTextChanged(buffer, start, before, after);
7581
7582            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7583                    (isFocused() || isSelected() &&
7584                    isShown())) {
7585                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7586                mBeforeText = null;
7587            }
7588        }
7589
7590        public void afterTextChanged(Editable buffer) {
7591            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7592            TextView.this.sendAfterTextChanged(buffer);
7593
7594            if (MetaKeyKeyListener.getMetaState(buffer,
7595                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7596                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7597            }
7598        }
7599
7600        public void onSpanChanged(Spannable buf,
7601                                  Object what, int s, int e, int st, int en) {
7602            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7603                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7604            TextView.this.spanChange(buf, what, s, st, e, en);
7605        }
7606
7607        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7608            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7609                    + " what=" + what + ": " + buf);
7610            TextView.this.spanChange(buf, what, -1, s, -1, e);
7611        }
7612
7613        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7614            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7615                    + " what=" + what + ": " + buf);
7616            TextView.this.spanChange(buf, what, s, -1, e, -1);
7617        }
7618    }
7619
7620    /**
7621     * @hide
7622     */
7623    @Override
7624    public void dispatchFinishTemporaryDetach() {
7625        mDispatchTemporaryDetach = true;
7626        super.dispatchFinishTemporaryDetach();
7627        mDispatchTemporaryDetach = false;
7628    }
7629
7630    @Override
7631    public void onStartTemporaryDetach() {
7632        super.onStartTemporaryDetach();
7633        // Only track when onStartTemporaryDetach() is called directly,
7634        // usually because this instance is an editable field in a list
7635        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7636
7637        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7638        // selection becomes visible again. Until a better solution is found, stop text selection
7639        // mode (if any) as soon as this TextView is recycled.
7640        hideControllers();
7641    }
7642
7643    @Override
7644    public void onFinishTemporaryDetach() {
7645        super.onFinishTemporaryDetach();
7646        // Only track when onStartTemporaryDetach() is called directly,
7647        // usually because this instance is an editable field in a list
7648        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7649    }
7650
7651    @Override
7652    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7653        if (mTemporaryDetach) {
7654            // If we are temporarily in the detach state, then do nothing.
7655            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7656            return;
7657        }
7658
7659        mShowCursor = SystemClock.uptimeMillis();
7660
7661        ensureEndedBatchEdit();
7662
7663        if (focused) {
7664            int selStart = getSelectionStart();
7665            int selEnd = getSelectionEnd();
7666
7667            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7668            // mode for these, unless there was a specific selection already started.
7669            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7670                    selEnd == mText.length();
7671            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7672
7673            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7674                // If a tap was used to give focus to that view, move cursor at tap position.
7675                // Has to be done before onTakeFocus, which can be overloaded.
7676                final int lastTapPosition = getLastTapPosition();
7677                if (lastTapPosition >= 0) {
7678                    Selection.setSelection((Spannable) mText, lastTapPosition);
7679                }
7680
7681                if (mMovement != null) {
7682                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7683                }
7684
7685                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7686                // pressed. Since it is the ViewAncestor's mView, it requests focus before
7687                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7688                // This special case ensure that we keep current selection in that case.
7689                // It would be better to know why the DecorView does not have focus at that time.
7690                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7691                        selStart >= 0 && selEnd >= 0) {
7692                    /*
7693                     * Someone intentionally set the selection, so let them
7694                     * do whatever it is that they wanted to do instead of
7695                     * the default on-focus behavior.  We reset the selection
7696                     * here instead of just skipping the onTakeFocus() call
7697                     * because some movement methods do something other than
7698                     * just setting the selection in theirs and we still
7699                     * need to go through that path.
7700                     */
7701                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7702                }
7703
7704                if (mSelectAllOnFocus) {
7705                    selectAll();
7706                }
7707
7708                mTouchFocusSelected = true;
7709            }
7710
7711            mFrozenWithFocus = false;
7712            mSelectionMoved = false;
7713
7714            if (mText instanceof Spannable) {
7715                Spannable sp = (Spannable) mText;
7716                MetaKeyKeyListener.resetMetaState(sp);
7717            }
7718
7719            makeBlink();
7720
7721            if (mError != null) {
7722                showError();
7723            }
7724        } else {
7725            if (mError != null) {
7726                hideError();
7727            }
7728            // Don't leave us in the middle of a batch edit.
7729            onEndBatchEdit();
7730
7731            if (this instanceof ExtractEditText) {
7732                // terminateTextSelectionMode removes selection, which we want to keep when
7733                // ExtractEditText goes out of focus.
7734                final int selStart = getSelectionStart();
7735                final int selEnd = getSelectionEnd();
7736                hideControllers();
7737                Selection.setSelection((Spannable) mText, selStart, selEnd);
7738            } else {
7739                hideControllers();
7740            }
7741
7742            // No need to create the controller
7743            if (mSelectionModifierCursorController != null) {
7744                mSelectionModifierCursorController.resetTouchOffsets();
7745            }
7746        }
7747
7748        startStopMarquee(focused);
7749
7750        if (mTransformation != null) {
7751            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7752        }
7753
7754        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7755    }
7756
7757    private int getLastTapPosition() {
7758        // No need to create the controller at that point, no last tap position saved
7759        if (mSelectionModifierCursorController != null) {
7760            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7761            if (lastTapPosition >= 0) {
7762                // Safety check, should not be possible.
7763                if (lastTapPosition > mText.length()) {
7764                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7765                            + mText.length() + ")");
7766                    lastTapPosition = mText.length();
7767                }
7768                return lastTapPosition;
7769            }
7770        }
7771
7772        return -1;
7773    }
7774
7775    @Override
7776    public void onWindowFocusChanged(boolean hasWindowFocus) {
7777        super.onWindowFocusChanged(hasWindowFocus);
7778
7779        if (hasWindowFocus) {
7780            if (mBlink != null) {
7781                mBlink.uncancel();
7782                makeBlink();
7783            }
7784        } else {
7785            if (mBlink != null) {
7786                mBlink.cancel();
7787            }
7788            // Don't leave us in the middle of a batch edit.
7789            onEndBatchEdit();
7790            if (mInputContentType != null) {
7791                mInputContentType.enterDown = false;
7792            }
7793            hideControllers();
7794            removeAllSuggestionSpans();
7795        }
7796
7797        startStopMarquee(hasWindowFocus);
7798    }
7799
7800    private void removeAllSuggestionSpans() {
7801        if (mText instanceof Editable) {
7802            Editable editable = ((Editable) mText);
7803            SuggestionSpan[] spans = editable.getSpans(0, mText.length(), SuggestionSpan.class);
7804            final int length = spans.length;
7805            for (int i = 0; i < length; i++) {
7806                editable.removeSpan(spans[i]);
7807            }
7808        }
7809    }
7810
7811    @Override
7812    protected void onVisibilityChanged(View changedView, int visibility) {
7813        super.onVisibilityChanged(changedView, visibility);
7814        if (visibility != VISIBLE) {
7815            hideControllers();
7816        }
7817    }
7818
7819    /**
7820     * Use {@link BaseInputConnection#removeComposingSpans
7821     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7822     * state from this text view.
7823     */
7824    public void clearComposingText() {
7825        if (mText instanceof Spannable) {
7826            BaseInputConnection.removeComposingSpans((Spannable)mText);
7827        }
7828    }
7829
7830    @Override
7831    public void setSelected(boolean selected) {
7832        boolean wasSelected = isSelected();
7833
7834        super.setSelected(selected);
7835
7836        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7837            if (selected) {
7838                startMarquee();
7839            } else {
7840                stopMarquee();
7841            }
7842        }
7843    }
7844
7845    @Override
7846    public boolean onTouchEvent(MotionEvent event) {
7847        final int action = event.getActionMasked();
7848
7849        if (hasSelectionController()) {
7850            getSelectionController().onTouchEvent(event);
7851        }
7852
7853        if (action == MotionEvent.ACTION_DOWN) {
7854            mLastDownPositionX = event.getX();
7855            mLastDownPositionY = event.getY();
7856
7857            // Reset this state; it will be re-set if super.onTouchEvent
7858            // causes focus to move to the view.
7859            mTouchFocusSelected = false;
7860            mIgnoreActionUpEvent = false;
7861        }
7862
7863        final boolean superResult = super.onTouchEvent(event);
7864
7865        /*
7866         * Don't handle the release after a long press, because it will
7867         * move the selection away from whatever the menu action was
7868         * trying to affect.
7869         */
7870        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7871            mDiscardNextActionUp = false;
7872            return superResult;
7873        }
7874
7875        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7876                isFocused();
7877
7878        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7879                && mText instanceof Spannable && mLayout != null) {
7880            boolean handled = false;
7881
7882            if (mMovement != null) {
7883                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7884            }
7885
7886            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7887                // The LinkMovementMethod which should handle taps on links has not been installed
7888                // to support text selection. We reproduce its behavior here to open links.
7889                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7890                        getSelectionEnd(), ClickableSpan.class);
7891
7892                if (links.length != 0) {
7893                    links[0].onClick(this);
7894                    handled = true;
7895                }
7896            }
7897
7898            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7899                // Show the IME, except when selecting in read-only text.
7900                final InputMethodManager imm = InputMethodManager.peekInstance();
7901                if (imm != null) {
7902                    imm.viewClicked(this);
7903                }
7904                if (!mTextIsSelectable) {
7905                    handled |= imm != null && imm.showSoftInput(this, 0);
7906                }
7907
7908                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7909                if (!selectAllGotFocus && hasSelection()) {
7910                    startSelectionActionMode();
7911                } else {
7912                    hideControllers();
7913                    if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7914                        getInsertionController().show();
7915                    }
7916                }
7917            }
7918
7919            if (handled) {
7920                return true;
7921            }
7922        }
7923
7924        return superResult;
7925    }
7926
7927    @Override
7928    public boolean onGenericMotionEvent(MotionEvent event) {
7929        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7930            try {
7931                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7932                    return true;
7933                }
7934            } catch (AbstractMethodError ex) {
7935                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7936                // Ignore its absence in case third party applications implemented the
7937                // interface directly.
7938            }
7939        }
7940        return super.onGenericMotionEvent(event);
7941    }
7942
7943    private void prepareCursorControllers() {
7944        boolean windowSupportsHandles = false;
7945
7946        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7947        if (params instanceof WindowManager.LayoutParams) {
7948            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7949            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7950                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7951        }
7952
7953        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7954        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7955                mLayout != null;
7956
7957        if (!mInsertionControllerEnabled) {
7958            hideInsertionPointCursorController();
7959            if (mInsertionPointCursorController != null) {
7960                mInsertionPointCursorController.onDetached();
7961                mInsertionPointCursorController = null;
7962            }
7963        }
7964
7965        if (!mSelectionControllerEnabled) {
7966            stopSelectionActionMode();
7967            if (mSelectionModifierCursorController != null) {
7968                mSelectionModifierCursorController.onDetached();
7969                mSelectionModifierCursorController = null;
7970            }
7971        }
7972    }
7973
7974    /**
7975     * @return True iff this TextView contains a text that can be edited, or if this is
7976     * a selectable TextView.
7977     */
7978    private boolean isTextEditable() {
7979        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7980    }
7981
7982    /**
7983     * Returns true, only while processing a touch gesture, if the initial
7984     * touch down event caused focus to move to the text view and as a result
7985     * its selection changed.  Only valid while processing the touch gesture
7986     * of interest.
7987     */
7988    public boolean didTouchFocusSelect() {
7989        return mTouchFocusSelected;
7990    }
7991
7992    @Override
7993    public void cancelLongPress() {
7994        super.cancelLongPress();
7995        mIgnoreActionUpEvent = true;
7996    }
7997
7998    @Override
7999    public boolean onTrackballEvent(MotionEvent event) {
8000        if (mMovement != null && mText instanceof Spannable &&
8001            mLayout != null) {
8002            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8003                return true;
8004            }
8005        }
8006
8007        return super.onTrackballEvent(event);
8008    }
8009
8010    public void setScroller(Scroller s) {
8011        mScroller = s;
8012    }
8013
8014    private static class Blink extends Handler implements Runnable {
8015        private final WeakReference<TextView> mView;
8016        private boolean mCancelled;
8017
8018        public Blink(TextView v) {
8019            mView = new WeakReference<TextView>(v);
8020        }
8021
8022        public void run() {
8023            if (mCancelled) {
8024                return;
8025            }
8026
8027            removeCallbacks(Blink.this);
8028
8029            TextView tv = mView.get();
8030
8031            if (tv != null && tv.shouldBlink()) {
8032                if (tv.mLayout != null) {
8033                    tv.invalidateCursorPath();
8034                }
8035
8036                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8037            }
8038        }
8039
8040        void cancel() {
8041            if (!mCancelled) {
8042                removeCallbacks(Blink.this);
8043                mCancelled = true;
8044            }
8045        }
8046
8047        void uncancel() {
8048            mCancelled = false;
8049        }
8050    }
8051
8052    /**
8053     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8054     */
8055    private boolean shouldBlink() {
8056        if (!isFocused()) return false;
8057
8058        final int start = getSelectionStart();
8059        if (start < 0) return false;
8060
8061        final int end = getSelectionEnd();
8062        if (end < 0) return false;
8063
8064        return start == end;
8065    }
8066
8067    private void makeBlink() {
8068        if (isCursorVisible()) {
8069            if (shouldBlink()) {
8070                mShowCursor = SystemClock.uptimeMillis();
8071                if (mBlink == null) mBlink = new Blink(this);
8072                mBlink.removeCallbacks(mBlink);
8073                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8074            }
8075        } else {
8076            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8077        }
8078    }
8079
8080    @Override
8081    protected float getLeftFadingEdgeStrength() {
8082        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8083        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8084            if (mMarquee != null && !mMarquee.isStopped()) {
8085                final Marquee marquee = mMarquee;
8086                if (marquee.shouldDrawLeftFade()) {
8087                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8088                } else {
8089                    return 0.0f;
8090                }
8091            } else if (getLineCount() == 1) {
8092                final int layoutDirection = getResolvedLayoutDirection();
8093                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8094                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8095                    case Gravity.LEFT:
8096                        return 0.0f;
8097                    case Gravity.RIGHT:
8098                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8099                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8100                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8101                    case Gravity.CENTER_HORIZONTAL:
8102                        return 0.0f;
8103                }
8104            }
8105        }
8106        return super.getLeftFadingEdgeStrength();
8107    }
8108
8109    @Override
8110    protected float getRightFadingEdgeStrength() {
8111        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8112        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8113            if (mMarquee != null && !mMarquee.isStopped()) {
8114                final Marquee marquee = mMarquee;
8115                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8116            } else if (getLineCount() == 1) {
8117                final int layoutDirection = getResolvedLayoutDirection();
8118                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8119                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8120                    case Gravity.LEFT:
8121                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8122                                getCompoundPaddingRight();
8123                        final float lineWidth = mLayout.getLineWidth(0);
8124                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8125                    case Gravity.RIGHT:
8126                        return 0.0f;
8127                    case Gravity.CENTER_HORIZONTAL:
8128                    case Gravity.FILL_HORIZONTAL:
8129                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8130                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8131                                getHorizontalFadingEdgeLength();
8132                }
8133            }
8134        }
8135        return super.getRightFadingEdgeStrength();
8136    }
8137
8138    @Override
8139    protected int computeHorizontalScrollRange() {
8140        if (mLayout != null) {
8141            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8142                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8143        }
8144
8145        return super.computeHorizontalScrollRange();
8146    }
8147
8148    @Override
8149    protected int computeVerticalScrollRange() {
8150        if (mLayout != null)
8151            return mLayout.getHeight();
8152
8153        return super.computeVerticalScrollRange();
8154    }
8155
8156    @Override
8157    protected int computeVerticalScrollExtent() {
8158        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8159    }
8160
8161    @Override
8162    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched) {
8163        if (TextUtils.isEmpty(searched)) {
8164            return;
8165        }
8166        CharSequence thisText = getText();
8167        if (TextUtils.isEmpty(thisText)) {
8168            return;
8169        }
8170        String searchedLowerCase = searched.toString().toLowerCase();
8171        String thisTextLowerCase = thisText.toString().toLowerCase();
8172        if (thisTextLowerCase.contains(searchedLowerCase)) {
8173            outViews.add(this);
8174        }
8175    }
8176
8177    public enum BufferType {
8178        NORMAL, SPANNABLE, EDITABLE,
8179    }
8180
8181    /**
8182     * Returns the TextView_textColor attribute from the
8183     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8184     * from the TextView_textAppearance attribute, if TextView_textColor
8185     * was not set directly.
8186     */
8187    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8188        ColorStateList colors;
8189        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8190                                         TextView_textColor);
8191
8192        if (colors == null) {
8193            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8194                                         TextView_textAppearance, -1);
8195            if (ap != -1) {
8196                TypedArray appearance;
8197                appearance = context.obtainStyledAttributes(ap,
8198                                            com.android.internal.R.styleable.TextAppearance);
8199                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8200                                                  TextAppearance_textColor);
8201                appearance.recycle();
8202            }
8203        }
8204
8205        return colors;
8206    }
8207
8208    /**
8209     * Returns the default color from the TextView_textColor attribute
8210     * from the AttributeSet, if set, or the default color from the
8211     * TextAppearance_textColor from the TextView_textAppearance attribute,
8212     * if TextView_textColor was not set directly.
8213     */
8214    public static int getTextColor(Context context,
8215                                   TypedArray attrs,
8216                                   int def) {
8217        ColorStateList colors = getTextColors(context, attrs);
8218
8219        if (colors == null) {
8220            return def;
8221        } else {
8222            return colors.getDefaultColor();
8223        }
8224    }
8225
8226    @Override
8227    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8228        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8229        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8230            switch (keyCode) {
8231            case KeyEvent.KEYCODE_A:
8232                if (canSelectText()) {
8233                    return onTextContextMenuItem(ID_SELECT_ALL);
8234                }
8235                break;
8236            case KeyEvent.KEYCODE_X:
8237                if (canCut()) {
8238                    return onTextContextMenuItem(ID_CUT);
8239                }
8240                break;
8241            case KeyEvent.KEYCODE_C:
8242                if (canCopy()) {
8243                    return onTextContextMenuItem(ID_COPY);
8244                }
8245                break;
8246            case KeyEvent.KEYCODE_V:
8247                if (canPaste()) {
8248                    return onTextContextMenuItem(ID_PASTE);
8249                }
8250                break;
8251            }
8252        }
8253        return super.onKeyShortcut(keyCode, event);
8254    }
8255
8256    /**
8257     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8258     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8259     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8260     */
8261    private boolean canSelectText() {
8262        return hasSelectionController() && mText.length() != 0;
8263    }
8264
8265    /**
8266     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8267     * The text must be spannable and the movement method must allow for arbitary selection.
8268     *
8269     * See also {@link #canSelectText()}.
8270     */
8271    private boolean textCanBeSelected() {
8272        // prepareCursorController() relies on this method.
8273        // If you change this condition, make sure prepareCursorController is called anywhere
8274        // the value of this condition might be changed.
8275        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8276        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8277    }
8278
8279    private boolean canCut() {
8280        if (hasPasswordTransformationMethod()) {
8281            return false;
8282        }
8283
8284        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8285            return true;
8286        }
8287
8288        return false;
8289    }
8290
8291    private boolean canCopy() {
8292        if (hasPasswordTransformationMethod()) {
8293            return false;
8294        }
8295
8296        if (mText.length() > 0 && hasSelection()) {
8297            return true;
8298        }
8299
8300        return false;
8301    }
8302
8303    private boolean canPaste() {
8304        return (mText instanceof Editable &&
8305                mInput != null &&
8306                getSelectionStart() >= 0 &&
8307                getSelectionEnd() >= 0 &&
8308                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8309                hasPrimaryClip());
8310    }
8311
8312    private static long packRangeInLong(int start, int end) {
8313        return (((long) start) << 32) | end;
8314    }
8315
8316    private static int extractRangeStartFromLong(long range) {
8317        return (int) (range >>> 32);
8318    }
8319
8320    private static int extractRangeEndFromLong(long range) {
8321        return (int) (range & 0x00000000FFFFFFFFL);
8322    }
8323
8324    private boolean selectAll() {
8325        final int length = mText.length();
8326        Selection.setSelection((Spannable) mText, 0, length);
8327        return length > 0;
8328    }
8329
8330    /**
8331     * Adjusts selection to the word under last touch offset.
8332     * Return true if the operation was successfully performed.
8333     */
8334    private boolean selectCurrentWord() {
8335        if (!canSelectText()) {
8336            return false;
8337        }
8338
8339        if (hasPasswordTransformationMethod()) {
8340            // Always select all on a password field.
8341            // Cut/copy menu entries are not available for passwords, but being able to select all
8342            // is however useful to delete or paste to replace the entire content.
8343            return selectAll();
8344        }
8345
8346        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8347        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8348
8349        // Specific text field types: select the entire text for these
8350        if (klass == InputType.TYPE_CLASS_NUMBER ||
8351                klass == InputType.TYPE_CLASS_PHONE ||
8352                klass == InputType.TYPE_CLASS_DATETIME ||
8353                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8354                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8355                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8356                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8357            return selectAll();
8358        }
8359
8360        long lastTouchOffsets = getLastTouchOffsets();
8361        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8362        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8363
8364        // Safety check in case standard touch event handling has been bypassed
8365        if (minOffset < 0 || minOffset >= mText.length()) return false;
8366        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8367
8368        int selectionStart, selectionEnd;
8369
8370        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8371        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8372        if (urlSpans.length == 1) {
8373            URLSpan url = urlSpans[0];
8374            selectionStart = ((Spanned) mText).getSpanStart(url);
8375            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8376        } else {
8377            if (mWordIterator == null) {
8378                mWordIterator = new WordIterator();
8379            }
8380            // WordIerator handles text changes, this is a no-op if text in unchanged.
8381            mWordIterator.setCharSequence(mText);
8382
8383            selectionStart = mWordIterator.getBeginning(minOffset);
8384            if (selectionStart == BreakIterator.DONE) return false;
8385
8386            selectionEnd = mWordIterator.getEnd(maxOffset);
8387            if (selectionEnd == BreakIterator.DONE) return false;
8388        }
8389
8390        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8391        return true;
8392    }
8393
8394    private long getLastTouchOffsets() {
8395        int minOffset, maxOffset;
8396
8397        if (mContextMenuTriggeredByKey) {
8398            minOffset = getSelectionStart();
8399            maxOffset = getSelectionEnd();
8400        } else {
8401            SelectionModifierCursorController selectionController = getSelectionController();
8402            minOffset = selectionController.getMinTouchOffset();
8403            maxOffset = selectionController.getMaxTouchOffset();
8404        }
8405
8406        return packRangeInLong(minOffset, maxOffset);
8407    }
8408
8409    @Override
8410    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8411        super.onPopulateAccessibilityEvent(event);
8412
8413        final boolean isPassword = hasPasswordTransformationMethod();
8414        if (!isPassword) {
8415            CharSequence text = getText();
8416            if (TextUtils.isEmpty(text)) {
8417                text = getHint();
8418            }
8419            if (TextUtils.isEmpty(text)) {
8420                text = getContentDescription();
8421            }
8422            if (!TextUtils.isEmpty(text)) {
8423                event.getText().add(text);
8424            }
8425        }
8426    }
8427
8428    @Override
8429    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8430        super.onInitializeAccessibilityEvent(event);
8431
8432        final boolean isPassword = hasPasswordTransformationMethod();
8433        event.setPassword(isPassword);
8434
8435        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8436            event.setFromIndex(Selection.getSelectionStart(mText));
8437            event.setToIndex(Selection.getSelectionEnd(mText));
8438            event.setItemCount(mText.length());
8439        }
8440    }
8441
8442    @Override
8443    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
8444        super.onInitializeAccessibilityNodeInfo(info);
8445
8446        final boolean isPassword = hasPasswordTransformationMethod();
8447        if (!isPassword) {
8448            info.setText(getText());
8449        }
8450        info.setPassword(isPassword);
8451    }
8452
8453    @Override
8454    public void sendAccessibilityEvent(int eventType) {
8455        // Do not send scroll events since first they are not interesting for
8456        // accessibility and second such events a generated too frequently.
8457        // For details see the implementation of bringTextIntoView().
8458        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
8459            return;
8460        }
8461        super.sendAccessibilityEvent(eventType);
8462    }
8463
8464    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8465            int fromIndex, int removedCount, int addedCount) {
8466        AccessibilityEvent event =
8467            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8468        event.setFromIndex(fromIndex);
8469        event.setRemovedCount(removedCount);
8470        event.setAddedCount(addedCount);
8471        event.setBeforeText(beforeText);
8472        sendAccessibilityEventUnchecked(event);
8473    }
8474
8475    @Override
8476    protected void onCreateContextMenu(ContextMenu menu) {
8477        super.onCreateContextMenu(menu);
8478        boolean added = false;
8479        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
8480        // Problem with context menu on long press: the menu appears while the key in down and when
8481        // the key is released, the view does not receive the key_up event.
8482        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
8483        // events. We cannot simply clear these flags in onTextContextMenuItem since
8484        // it may not be called (if the user/ discards the context menu with the back key).
8485        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
8486        // available in onTextContextMenuItem.
8487        mDPadCenterIsDown = mEnterKeyIsDown = false;
8488
8489        MenuHandler handler = new MenuHandler();
8490
8491        if (mText instanceof Spanned && hasSelectionController()) {
8492            long lastTouchOffset = getLastTouchOffsets();
8493            final int selStart = extractRangeStartFromLong(lastTouchOffset);
8494            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
8495
8496            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
8497            if (urls.length > 0) {
8498                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
8499                        setOnMenuItemClickListener(handler);
8500
8501                added = true;
8502            }
8503        }
8504
8505        // The context menu is not empty, which will prevent the selection mode from starting.
8506        // Add a entry to start it in the context menu.
8507        // TODO Does not handle the case where a subclass does not call super.thisMethod or
8508        // populates the menu AFTER this call.
8509        if (menu.size() > 0) {
8510            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
8511                    setOnMenuItemClickListener(handler);
8512            added = true;
8513        }
8514
8515        if (added) {
8516            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
8517        }
8518    }
8519
8520    /**
8521     * Returns whether this text view is a current input method target.  The
8522     * default implementation just checks with {@link InputMethodManager}.
8523     */
8524    public boolean isInputMethodTarget() {
8525        InputMethodManager imm = InputMethodManager.peekInstance();
8526        return imm != null && imm.isActive(this);
8527    }
8528
8529    // Selection context mode
8530    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8531    private static final int ID_CUT = android.R.id.cut;
8532    private static final int ID_COPY = android.R.id.copy;
8533    private static final int ID_PASTE = android.R.id.paste;
8534    // Context menu entries
8535    private static final int ID_COPY_URL = android.R.id.copyUrl;
8536    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8537
8538    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8539        public boolean onMenuItemClick(MenuItem item) {
8540            return onTextContextMenuItem(item.getItemId());
8541        }
8542    }
8543
8544    /**
8545     * Called when a context menu option for the text view is selected.  Currently
8546     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8547     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8548     * or {@link android.R.id#copy}.
8549     *
8550     * @return true if the context menu item action was performed.
8551     */
8552    public boolean onTextContextMenuItem(int id) {
8553        int min = 0;
8554        int max = mText.length();
8555
8556        if (isFocused()) {
8557            final int selStart = getSelectionStart();
8558            final int selEnd = getSelectionEnd();
8559
8560            min = Math.max(0, Math.min(selStart, selEnd));
8561            max = Math.max(0, Math.max(selStart, selEnd));
8562        }
8563
8564        switch (id) {
8565            case ID_COPY_URL:
8566                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8567                if (urls.length >= 1) {
8568                    ClipData clip = null;
8569                    for (int i=0; i<urls.length; i++) {
8570                        Uri uri = Uri.parse(urls[0].getURL());
8571                        if (clip == null) {
8572                            clip = ClipData.newRawUri(null, uri);
8573                        } else {
8574                            clip.addItem(new ClipData.Item(uri));
8575                        }
8576                    }
8577                    if (clip != null) {
8578                        setPrimaryClip(clip);
8579                    }
8580                }
8581                stopSelectionActionMode();
8582                return true;
8583
8584            case ID_SELECTION_MODE:
8585                if (mSelectionActionMode != null) {
8586                    // Selection mode is already started, simply change selected part.
8587                    selectCurrentWord();
8588                } else {
8589                    startSelectionActionMode();
8590                }
8591                return true;
8592
8593            case ID_SELECT_ALL:
8594                // This does not enter text selection mode. Text is highlighted, so that it can be
8595                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8596                selectAll();
8597                return true;
8598
8599            case ID_PASTE:
8600                paste(min, max);
8601                return true;
8602
8603            case ID_CUT:
8604                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8605                ((Editable) mText).delete(min, max);
8606                stopSelectionActionMode();
8607                return true;
8608
8609            case ID_COPY:
8610                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8611                stopSelectionActionMode();
8612                return true;
8613        }
8614        return false;
8615    }
8616
8617    /**
8618     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8619     * by [min, max] when replacing this region by paste.
8620     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8621     * make sure we do not add an extra one from the paste content.
8622     */
8623    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8624        if (paste.length() > 0) {
8625            if (min > 0) {
8626                final char charBefore = mTransformed.charAt(min - 1);
8627                final char charAfter = paste.charAt(0);
8628
8629                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8630                    // Two spaces at beginning of paste: remove one
8631                    final int originalLength = mText.length();
8632                    ((Editable) mText).delete(min - 1, min);
8633                    // Due to filters, there is no guarantee that exactly one character was
8634                    // removed: count instead.
8635                    final int delta = mText.length() - originalLength;
8636                    min += delta;
8637                    max += delta;
8638                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8639                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8640                    // No space at beginning of paste: add one
8641                    final int originalLength = mText.length();
8642                    ((Editable) mText).replace(min, min, " ");
8643                    // Taking possible filters into account as above.
8644                    final int delta = mText.length() - originalLength;
8645                    min += delta;
8646                    max += delta;
8647                }
8648            }
8649
8650            if (max < mText.length()) {
8651                final char charBefore = paste.charAt(paste.length() - 1);
8652                final char charAfter = mTransformed.charAt(max);
8653
8654                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8655                    // Two spaces at end of paste: remove one
8656                    ((Editable) mText).delete(max, max + 1);
8657                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8658                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8659                    // No space at end of paste: add one
8660                    ((Editable) mText).replace(max, max, " ");
8661                }
8662            }
8663        }
8664
8665        return packRangeInLong(min, max);
8666    }
8667
8668    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8669        TextView shadowView = (TextView) inflate(mContext,
8670                com.android.internal.R.layout.text_drag_thumbnail, null);
8671
8672        if (shadowView == null) {
8673            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8674        }
8675
8676        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8677            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8678        }
8679        shadowView.setText(text);
8680        shadowView.setTextColor(getTextColors());
8681
8682        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8683        shadowView.setGravity(Gravity.CENTER);
8684
8685        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8686                ViewGroup.LayoutParams.WRAP_CONTENT));
8687
8688        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8689        shadowView.measure(size, size);
8690
8691        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8692        shadowView.invalidate();
8693        return new DragShadowBuilder(shadowView);
8694    }
8695
8696    private static class DragLocalState {
8697        public TextView sourceTextView;
8698        public int start, end;
8699
8700        public DragLocalState(TextView sourceTextView, int start, int end) {
8701            this.sourceTextView = sourceTextView;
8702            this.start = start;
8703            this.end = end;
8704        }
8705    }
8706
8707    @Override
8708    public boolean performLongClick() {
8709        if (super.performLongClick()) {
8710            mDiscardNextActionUp = true;
8711            return true;
8712        }
8713
8714        boolean handled = false;
8715
8716        // Long press in empty space moves cursor and shows the Paste affordance if available.
8717        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8718                mInsertionControllerEnabled) {
8719            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
8720            stopSelectionActionMode();
8721            Selection.setSelection((Spannable) mText, offset);
8722            getInsertionController().showImmediately();
8723            handled = true;
8724        }
8725
8726        if (!handled && mSelectionActionMode != null) {
8727            if (touchPositionIsInSelection()) {
8728                // Start a drag
8729                final int start = getSelectionStart();
8730                final int end = getSelectionEnd();
8731                CharSequence selectedText = mTransformed.subSequence(start, end);
8732                ClipData data = ClipData.newPlainText(null, selectedText);
8733                DragLocalState localState = new DragLocalState(this, start, end);
8734                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8735                stopSelectionActionMode();
8736            } else {
8737                selectCurrentWord();
8738            }
8739            handled = true;
8740        }
8741
8742        // Start a new selection
8743        handled |= !handled && startSelectionActionMode();
8744
8745        if (handled) {
8746            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8747            mDiscardNextActionUp = true;
8748        }
8749
8750        return handled;
8751    }
8752
8753    private boolean touchPositionIsInSelection() {
8754        int selectionStart = getSelectionStart();
8755        int selectionEnd = getSelectionEnd();
8756
8757        if (selectionStart == selectionEnd) {
8758            return false;
8759        }
8760
8761        if (selectionStart > selectionEnd) {
8762            int tmp = selectionStart;
8763            selectionStart = selectionEnd;
8764            selectionEnd = tmp;
8765            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8766        }
8767
8768        SelectionModifierCursorController selectionController = getSelectionController();
8769        int minOffset = selectionController.getMinTouchOffset();
8770        int maxOffset = selectionController.getMaxTouchOffset();
8771
8772        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8773    }
8774
8775    private PositionListener getPositionListener() {
8776        if (mPositionListener == null) {
8777            mPositionListener = new PositionListener();
8778        }
8779        return mPositionListener;
8780    }
8781
8782    private interface TextViewPositionListener {
8783        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified);
8784    }
8785
8786    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
8787        // 3 handles, 2 ActionPopup (suggestionsPopup first hides the others)
8788        private final int MAXIMUM_NUMBER_OF_LISTENERS = 5;
8789        private TextViewPositionListener[] mPositionListeners =
8790                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
8791        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
8792        private boolean mPositionHasChanged = true;
8793        // Absolute position of the TextView with respect to its parent window
8794        private int mPositionX, mPositionY;
8795        private int mNumberOfListeners;
8796
8797        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
8798            if (mNumberOfListeners == 0) {
8799                updatePosition();
8800                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8801                vto.addOnPreDrawListener(this);
8802            }
8803
8804            int emptySlotIndex = -1;
8805            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8806                TextViewPositionListener listener = mPositionListeners[i];
8807                if (listener == positionListener) {
8808                    return;
8809                } else if (emptySlotIndex < 0 && listener == null) {
8810                    emptySlotIndex = i;
8811                }
8812            }
8813
8814            mPositionListeners[emptySlotIndex] = positionListener;
8815            mCanMove[emptySlotIndex] = canMove;
8816            mNumberOfListeners++;
8817        }
8818
8819        public void removeSubscriber(TextViewPositionListener positionListener) {
8820            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8821                if (mPositionListeners[i] == positionListener) {
8822                    mPositionListeners[i] = null;
8823                    mNumberOfListeners--;
8824                    break;
8825                }
8826            }
8827
8828            if (mNumberOfListeners == 0) {
8829                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
8830                vto.removeOnPreDrawListener(this);
8831            }
8832        }
8833
8834        public int getPositionX() {
8835            return mPositionX;
8836        }
8837
8838        public int getPositionY() {
8839            return mPositionY;
8840        }
8841
8842        @Override
8843        public boolean onPreDraw() {
8844            updatePosition();
8845
8846            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
8847                if (mPositionHasChanged || mCanMove[i]) {
8848                    TextViewPositionListener positionListener = mPositionListeners[i];
8849                    if (positionListener != null) {
8850                        positionListener.updatePosition(mPositionX, mPositionY,
8851                                mPositionHasChanged);
8852                    }
8853                }
8854            }
8855
8856            return true;
8857        }
8858
8859        private void updatePosition() {
8860            TextView.this.getLocationInWindow(mTempCoords);
8861
8862            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
8863
8864            mPositionX = mTempCoords[0];
8865            mPositionY = mTempCoords[1];
8866        }
8867
8868        public boolean isVisible(int positionX, int positionY) {
8869            final TextView textView = TextView.this;
8870
8871            if (mTempRect == null) mTempRect = new Rect();
8872            final Rect clip = mTempRect;
8873            clip.left = getCompoundPaddingLeft();
8874            clip.top = getExtendedPaddingTop();
8875            clip.right = textView.getWidth() - getCompoundPaddingRight();
8876            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
8877
8878            final ViewParent parent = textView.getParent();
8879            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
8880                return false;
8881            }
8882
8883            int posX = mPositionX + positionX;
8884            int posY = mPositionY + positionY;
8885
8886            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
8887            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
8888                    posY >= clip.top && posY <= clip.bottom;
8889        }
8890
8891        public boolean isOffsetVisible(int offset) {
8892            final int line = mLayout.getLineForOffset(offset);
8893            final int lineBottom = mLayout.getLineBottom(line);
8894            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
8895            return isVisible(primaryHorizontal, lineBottom);
8896        }
8897    }
8898
8899    private abstract class PinnedPopupWindow implements TextViewPositionListener {
8900        protected PopupWindow mPopupWindow;
8901        protected LinearLayout mContentView;
8902        int mPositionX, mPositionY;
8903
8904        protected abstract void createPopupWindow();
8905        protected abstract void initContentView();
8906        protected abstract int getTextOffset();
8907        protected abstract int getVerticalLocalPosition(int line);
8908        protected abstract int clipVertically(int positionY);
8909
8910        public PinnedPopupWindow() {
8911            createPopupWindow();
8912
8913            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8914            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8915            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8916
8917            mContentView = new LinearLayout(TextView.this.getContext());
8918            LayoutParams wrapContent = new LayoutParams(
8919                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
8920            mContentView.setLayoutParams(wrapContent);
8921
8922            initContentView();
8923            mPopupWindow.setContentView(mContentView);
8924        }
8925
8926        public void show() {
8927            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
8928            mContentView.measure(
8929                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
8930                            View.MeasureSpec.AT_MOST),
8931                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
8932                            View.MeasureSpec.AT_MOST));
8933
8934            TextView.this.getPositionListener().addSubscriber(this, false);
8935
8936            computeLocalPosition();
8937
8938            final PositionListener positionListener = TextView.this.getPositionListener();
8939            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
8940        }
8941
8942        private void computeLocalPosition() {
8943            final int offset = getTextOffset();
8944
8945            final int width = mContentView.getMeasuredWidth();
8946            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
8947            mPositionX += viewportToContentHorizontalOffset();
8948
8949            final int line = mLayout.getLineForOffset(offset);
8950            mPositionY = getVerticalLocalPosition(line);
8951            mPositionY += viewportToContentVerticalOffset();
8952        }
8953
8954        private void updatePosition(int parentPositionX, int parentPositionY) {
8955            int positionX = parentPositionX + mPositionX;
8956            int positionY = parentPositionY + mPositionY;
8957
8958            positionY = clipVertically(positionY);
8959
8960            // Horizontal clipping
8961            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
8962            final int width = mContentView.getMeasuredWidth();
8963            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
8964            positionX = Math.max(0, positionX);
8965
8966            if (isShowing()) {
8967                mPopupWindow.update(positionX, positionY, -1, -1);
8968            } else {
8969                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
8970                        positionX, positionY);
8971            }
8972        }
8973
8974        public void hide() {
8975            mPopupWindow.dismiss();
8976            TextView.this.getPositionListener().removeSubscriber(this);
8977        }
8978
8979        @Override
8980        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
8981            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
8982                updatePosition(parentPositionX, parentPositionY);
8983            } else {
8984                hide();
8985            }
8986        }
8987
8988        public boolean isShowing() {
8989            return mPopupWindow.isShowing();
8990        }
8991    }
8992
8993    private static class SuggestionRangeSpan extends UnderlineSpan {
8994        // TODO themable, would be nice to make it a child class of TextAppearanceSpan, but
8995        // there is no way to have underline and TextAppearanceSpan.
8996    }
8997
8998    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnClickListener {
8999        private static final int MAX_NUMBER_SUGGESTIONS = 5;
9000        private static final int NO_SUGGESTIONS = -1;
9001        private WordIterator mSuggestionWordIterator;
9002        private TextAppearanceSpan[] mHighlightSpans = new TextAppearanceSpan[0];
9003
9004        @Override
9005        protected void createPopupWindow() {
9006            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9007                com.android.internal.R.attr.textSuggestionsWindowStyle);
9008            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9009            mPopupWindow.setOutsideTouchable(true);
9010            mPopupWindow.setClippingEnabled(false);
9011        }
9012
9013        @Override
9014        protected void initContentView() {
9015            mContentView.setOrientation(LinearLayout.VERTICAL);
9016
9017            LayoutInflater inflater = (LayoutInflater) TextView.this.mContext.
9018                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9019
9020            if (inflater == null) {
9021                throw new IllegalArgumentException(
9022                        "Unable to create inflater for TextEdit suggestions");
9023            }
9024
9025            // Inflate the suggestion items once and for all.
9026            for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
9027                View childView = inflater.inflate(mTextEditSuggestionItemLayout,
9028                        mContentView, false);
9029
9030                if (! (childView instanceof TextView)) {
9031                    throw new IllegalArgumentException(
9032                            "Inflated TextEdit suggestion item is not a TextView: " + childView);
9033                }
9034
9035                childView.setTag(new SuggestionInfo());
9036                mContentView.addView(childView);
9037                childView.setOnClickListener(this);
9038            }
9039        }
9040
9041        private class SuggestionInfo {
9042            int suggestionStart, suggestionEnd; // range of suggestion item with replacement text
9043            int spanStart, spanEnd; // range in TextView where text should be inserted
9044            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9045            int suggestionIndex; // the index of the suggestion inside suggestionSpan
9046        }
9047
9048        /**
9049         * Returns the suggestion spans that cover the current cursor position. The suggestion
9050         * spans are sorted according to the length of text that they are attached to.
9051         */
9052        private SuggestionSpan[] getSuggestionSpans() {
9053            int pos = TextView.this.getSelectionStart();
9054            Spannable spannable = (Spannable) TextView.this.mText;
9055            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9056
9057            // Cache the span length for performance reason.
9058            final HashMap<SuggestionSpan, Integer> spansLengths =
9059                    new HashMap<SuggestionSpan, Integer>();
9060
9061            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9062                int start = spannable.getSpanStart(suggestionSpan);
9063                int end = spannable.getSpanEnd(suggestionSpan);
9064                spansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9065            }
9066
9067            // The suggestions are sorted according to the lenght of the text that they cover
9068            // (shorter first)
9069            Arrays.sort(suggestionSpans, new Comparator<SuggestionSpan>() {
9070                public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9071                    return spansLengths.get(span1).intValue() - spansLengths.get(span2).intValue();
9072                }
9073            });
9074
9075            return suggestionSpans;
9076        }
9077
9078        @Override
9079        public void show() {
9080            if (!(mText instanceof Editable)) return;
9081            updateSuggestions();
9082
9083            super.show();
9084        }
9085
9086        @Override
9087        protected int getTextOffset() {
9088            return getSelectionStart();
9089        }
9090
9091        @Override
9092        protected int getVerticalLocalPosition(int line) {
9093            return mLayout.getLineBottom(line);
9094        }
9095
9096        @Override
9097        protected int clipVertically(int positionY) {
9098            final int height = mContentView.getMeasuredHeight();
9099            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9100            return Math.min(positionY, displayMetrics.heightPixels - height);
9101        }
9102
9103        @Override
9104        public void hide() {
9105            super.hide();
9106            if ((mText instanceof Editable) && mSuggestionRangeSpan != null) {
9107                ((Editable) mText).removeSpan(mSuggestionRangeSpan);
9108            }
9109        }
9110
9111        private void updateSuggestions() {
9112            Spannable spannable = (Spannable)TextView.this.mText;
9113            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9114
9115            final int nbSpans = suggestionSpans.length;
9116
9117            int totalNbSuggestions = 0;
9118            int spanUnionStart = mText.length();
9119            int spanUnionEnd = 0;
9120
9121            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9122                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9123                final int spanStart = spannable.getSpanStart(suggestionSpan);
9124                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9125                spanUnionStart = Math.min(spanStart, spanUnionStart);
9126                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9127
9128                String[] suggestions = suggestionSpan.getSuggestions();
9129                int nbSuggestions = suggestions.length;
9130                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9131                    TextView textView = (TextView) mContentView.getChildAt(
9132                            totalNbSuggestions);
9133                    textView.setText(suggestions[suggestionIndex]);
9134                    SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9135                    suggestionInfo.spanStart = spanStart;
9136                    suggestionInfo.spanEnd = spanEnd;
9137                    suggestionInfo.suggestionSpan = suggestionSpan;
9138                    suggestionInfo.suggestionIndex = suggestionIndex;
9139
9140                    totalNbSuggestions++;
9141                    if (totalNbSuggestions == MAX_NUMBER_SUGGESTIONS) {
9142                        // Also end outer for loop
9143                        spanIndex = nbSpans;
9144                        break;
9145                    }
9146                }
9147            }
9148
9149            if (totalNbSuggestions == 0) {
9150                // TODO Replace by final text, use a dedicated layout, add a fade out timer...
9151                TextView textView = (TextView) mContentView.getChildAt(0);
9152                textView.setText("No suggestions available");
9153                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9154                suggestionInfo.spanStart = NO_SUGGESTIONS;
9155                totalNbSuggestions++;
9156            } else {
9157                if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9158                ((Editable) mText).setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9159                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9160
9161                for (int i = 0; i < totalNbSuggestions; i++) {
9162                    final TextView textView = (TextView) mContentView.getChildAt(i);
9163                    highlightTextDifferences(textView, spanUnionStart, spanUnionEnd);
9164                }
9165            }
9166
9167            for (int i = 0; i < totalNbSuggestions; i++) {
9168                mContentView.getChildAt(i).setVisibility(VISIBLE);
9169            }
9170            for (int i = totalNbSuggestions; i < MAX_NUMBER_SUGGESTIONS; i++) {
9171                mContentView.getChildAt(i).setVisibility(GONE);
9172            }
9173        }
9174
9175        private long[] getWordLimits(CharSequence text) {
9176            // TODO locale for mSuggestionWordIterator
9177            if (mSuggestionWordIterator == null) mSuggestionWordIterator = new WordIterator();
9178            mSuggestionWordIterator.setCharSequence(text);
9179
9180            // First pass will simply count the number of words to be able to create an array
9181            // Not too expensive since previous break positions are cached by the BreakIterator
9182            int nbWords = 0;
9183            int position = mSuggestionWordIterator.following(0);
9184            while (position != BreakIterator.DONE) {
9185                nbWords++;
9186                position = mSuggestionWordIterator.following(position);
9187            }
9188
9189            int index = 0;
9190            long[] result = new long[nbWords];
9191
9192            position = mSuggestionWordIterator.following(0);
9193            while (position != BreakIterator.DONE) {
9194                int wordStart = mSuggestionWordIterator.getBeginning(position);
9195                result[index++] = packRangeInLong(wordStart, position);
9196                position = mSuggestionWordIterator.following(position);
9197            }
9198
9199            return result;
9200        }
9201
9202        private TextAppearanceSpan highlightSpan(int index) {
9203            final int length = mHighlightSpans.length;
9204            if (index < length) {
9205                return mHighlightSpans[index];
9206            }
9207
9208            // Assumes indexes are requested in sequence: simply append one more item
9209            TextAppearanceSpan[] newArray = new TextAppearanceSpan[length + 1];
9210            System.arraycopy(mHighlightSpans, 0, newArray, 0, length);
9211            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9212                    android.R.style.TextAppearance_SuggestionHighlight);
9213            newArray[length] = highlightSpan;
9214            mHighlightSpans = newArray;
9215            return highlightSpan;
9216        }
9217
9218        private void highlightTextDifferences(TextView textView, int unionStart, int unionEnd) {
9219            SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9220            final int spanStart = suggestionInfo.spanStart;
9221            final int spanEnd = suggestionInfo.spanEnd;
9222
9223            // Remove all text formating by converting to Strings
9224            final String text = textView.getText().toString();
9225            final String sourceText = mText.subSequence(spanStart, spanEnd).toString();
9226
9227            long[] sourceWordLimits = getWordLimits(sourceText);
9228            long[] wordLimits = getWordLimits(text);
9229
9230            SpannableStringBuilder ssb = new SpannableStringBuilder();
9231            // span [spanStart, spanEnd] is included in union [spanUnionStart, int spanUnionEnd]
9232            // The final result is made of 3 parts: the text before, between and after the span
9233            // This is the text before, provided for context
9234            ssb.append(mText.subSequence(unionStart, spanStart).toString());
9235
9236            // shift is used to offset spans positions wrt span's beginning
9237            final int shift = spanStart - unionStart;
9238            suggestionInfo.suggestionStart = shift;
9239            suggestionInfo.suggestionEnd = shift + text.length();
9240
9241            // This is the actual suggestion text, which will be highlighted by the following code
9242            ssb.append(text);
9243
9244            String[] words = new String[wordLimits.length];
9245            for (int i = 0; i < wordLimits.length; i++) {
9246                int wordStart = extractRangeStartFromLong(wordLimits[i]);
9247                int wordEnd = extractRangeEndFromLong(wordLimits[i]);
9248                words[i] = text.substring(wordStart, wordEnd);
9249            }
9250
9251            // Highlighted word algorithm is based on word matching between source and text
9252            // Matching words are found from left to right. TODO: change for RTL languages
9253            // Characters between matching words are highlighted
9254            int previousCommonWordIndex = -1;
9255            int nbHighlightSpans = 0;
9256            for (int i = 0; i < sourceWordLimits.length; i++) {
9257                int wordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9258                int wordEnd = extractRangeEndFromLong(sourceWordLimits[i]);
9259                String sourceWord = sourceText.substring(wordStart, wordEnd);
9260
9261                for (int j = previousCommonWordIndex + 1; j < words.length; j++) {
9262                    if (sourceWord.equals(words[j])) {
9263                        if (j != previousCommonWordIndex + 1) {
9264                            int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9265                                extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9266                            int lastDifferentPosition = extractRangeStartFromLong(wordLimits[j]);
9267                            ssb.setSpan(highlightSpan(nbHighlightSpans++),
9268                                    shift + firstDifferentPosition, shift + lastDifferentPosition,
9269                                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9270                        } else {
9271                            // Compare characters between words
9272                            int previousSourceWordEnd = i == 0 ? 0 :
9273                                extractRangeEndFromLong(sourceWordLimits[i - 1]);
9274                            int sourceWordStart = extractRangeStartFromLong(sourceWordLimits[i]);
9275                            String sourceSpaces = sourceText.substring(previousSourceWordEnd,
9276                                    sourceWordStart);
9277
9278                            int previousWordEnd = j == 0 ? 0 :
9279                                extractRangeEndFromLong(wordLimits[j - 1]);
9280                            int currentWordStart = extractRangeStartFromLong(wordLimits[j]);
9281                            String textSpaces = text.substring(previousWordEnd, currentWordStart);
9282
9283                            if (!sourceSpaces.equals(textSpaces)) {
9284                                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9285                                        shift + previousWordEnd, shift + currentWordStart,
9286                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9287                            }
9288                        }
9289                        previousCommonWordIndex = j;
9290                        break;
9291                    }
9292                }
9293            }
9294
9295            // Finally, compare ends of Strings
9296            if (previousCommonWordIndex < words.length - 1) {
9297                int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
9298                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9299                int lastDifferentPosition = textView.length();
9300                ssb.setSpan(highlightSpan(nbHighlightSpans++),
9301                        shift + firstDifferentPosition, shift + lastDifferentPosition,
9302                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9303            } else {
9304                int lastSourceWordEnd = sourceWordLimits.length == 0 ? 0 :
9305                    extractRangeEndFromLong(sourceWordLimits[sourceWordLimits.length - 1]);
9306                String sourceSpaces = sourceText.substring(lastSourceWordEnd, sourceText.length());
9307
9308                int lastCommonTextWordEnd = previousCommonWordIndex < 0 ? 0 :
9309                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
9310                String textSpaces = text.substring(lastCommonTextWordEnd, textView.length());
9311
9312                if (!sourceSpaces.equals(textSpaces) && textSpaces.length() > 0) {
9313                    ssb.setSpan(highlightSpan(nbHighlightSpans++),
9314                            shift + lastCommonTextWordEnd, shift + textView.length(),
9315                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9316                }
9317            }
9318
9319            // Final part, text after the current suggestion range.
9320            ssb.append(mText.subSequence(spanEnd, unionEnd).toString());
9321            textView.setText(ssb);
9322        }
9323
9324        @Override
9325        public void onClick(View view) {
9326            if (view instanceof TextView) {
9327                TextView textView = (TextView) view;
9328                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9329                final int spanStart = suggestionInfo.spanStart;
9330                final int spanEnd = suggestionInfo.spanEnd;
9331                if (spanStart != NO_SUGGESTIONS) {
9332                    // SuggestionSpans are removed by replace: save them before
9333                    Editable editable = ((Editable) mText);
9334                    SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9335                            SuggestionSpan.class);
9336                    final int length = suggestionSpans.length;
9337                    int[] suggestionSpansStarts = new int[length];
9338                    int[] suggestionSpansEnds = new int[length];
9339                    int[] suggestionSpansFlags = new int[length];
9340                    for (int i = 0; i < length; i++) {
9341                        final SuggestionSpan suggestionSpan = suggestionSpans[i];
9342                        suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9343                        suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9344                        suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9345                    }
9346
9347                    final int suggestionStart = suggestionInfo.suggestionStart;
9348                    final int suggestionEnd = suggestionInfo.suggestionEnd;
9349                    final String suggestion = textView.getText().subSequence(
9350                            suggestionStart, suggestionEnd).toString();
9351                    final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9352                    ((Editable) mText).replace(spanStart, spanEnd, suggestion);
9353
9354                    // Notify source IME of the suggestion pick. Do this before swaping texts.
9355                    if (!TextUtils.isEmpty(
9356                            suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9357                        InputMethodManager imm = InputMethodManager.peekInstance();
9358                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9359                                suggestionInfo.suggestionIndex);
9360                    }
9361
9362                    // Swap text content between actual text and Suggestion span
9363                    String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9364                    suggestions[suggestionInfo.suggestionIndex] = originalText;
9365
9366                    // Restore previous SuggestionSpans
9367                    final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9368                    for (int i = 0; i < length; i++) {
9369                        // Only spans that include the modified region make sense after replacement
9370                        // Spans partially included in the replaced region are removed, there is no
9371                        // way to assign them a valid range after replacement
9372                        if (suggestionSpansStarts[i] <= spanStart &&
9373                                suggestionSpansEnds[i] >= spanEnd) {
9374                            editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9375                                    suggestionSpansEnds[i] + lengthDifference,
9376                                    suggestionSpansFlags[i]);
9377                        }
9378                    }
9379                }
9380            }
9381            hide();
9382        }
9383    }
9384
9385    void showSuggestions() {
9386        if (!isSuggestionsEnabled() || !isTextEditable()) return;
9387
9388        if (mSuggestionsPopupWindow == null) {
9389            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9390        }
9391        hideControllers();
9392        mSuggestionsPopupWindow.show();
9393    }
9394
9395    void hideSuggestions() {
9396        if (mSuggestionsPopupWindow != null) {
9397            mSuggestionsPopupWindow.hide();
9398        }
9399    }
9400
9401    boolean areSuggestionsShown() {
9402        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
9403    }
9404
9405    /**
9406     * Some parts of the text can have alternate suggestion text attached. This is typically done by
9407     * the IME by adding {@link SuggestionSpan}s to the text.
9408     *
9409     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9410     * user double taps on these parts of the text. No suggestions are displayed when this value is
9411     * false. Use {@link #setSuggestionsEnabled(boolean)} to change this value.
9412     *
9413     * Note that suggestions are only enabled for a subset of input types. In addition to setting
9414     * this flag to <code>true</code> using {@link #setSuggestionsEnabled(boolean)} or the
9415     * <code>android:suggestionsEnabled</code> xml attribute, this method will return
9416     * <code>true</code> only if the class of your input type is {@link InputType#TYPE_CLASS_TEXT}.
9417     * In addition, the type variation must also be one of
9418     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
9419     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
9420     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
9421     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
9422     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
9423     *
9424     * @return true if the suggestions popup window is enabled.
9425     *
9426     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9427     */
9428    public boolean isSuggestionsEnabled() {
9429        if (!mSuggestionsEnabled) return false;
9430        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
9431        final int variation =
9432                mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
9433        if (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
9434                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
9435                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
9436                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
9437                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT) return true;
9438
9439        return false;
9440    }
9441
9442    /**
9443     * Enables or disables the suggestion popup. See {@link #isSuggestionsEnabled()}.
9444     *
9445     * @param enabled Whether or not suggestions are enabled.
9446     *
9447     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9448     */
9449    public void setSuggestionsEnabled(boolean enabled) {
9450        mSuggestionsEnabled = enabled;
9451    }
9452
9453    /**
9454     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9455     * selection is initiated in this View.
9456     *
9457     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
9458     * Paste actions, depending on what this View supports.
9459     *
9460     * A custom implementation can add new entries in the default menu in its
9461     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
9462     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
9463     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
9464     * or {@link android.R.id#paste} ids as parameters.
9465     *
9466     * Returning false from
9467     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
9468     * the action mode from being started.
9469     *
9470     * Action click events should be handled by the custom implementation of
9471     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
9472     *
9473     * Note that text selection mode is not started when a TextView receives focus and the
9474     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9475     * that case, to allow for quick replacement.
9476     */
9477    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9478        mCustomSelectionActionModeCallback = actionModeCallback;
9479    }
9480
9481    /**
9482     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9483     *
9484     * @return The current custom selection callback.
9485     */
9486    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9487        return mCustomSelectionActionModeCallback;
9488    }
9489
9490    /**
9491     *
9492     * @return true if the selection mode was actually started.
9493     */
9494    private boolean startSelectionActionMode() {
9495        if (mSelectionActionMode != null) {
9496            // Selection action mode is already started
9497            return false;
9498        }
9499
9500        if (!canSelectText() || !requestFocus()) {
9501            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
9502            return false;
9503        }
9504
9505        if (!hasSelection()) {
9506            // There may already be a selection on device rotation
9507            boolean currentWordSelected = selectCurrentWord();
9508            if (!currentWordSelected) {
9509                // No word found under cursor or text selection not permitted.
9510                return false;
9511            }
9512        }
9513
9514        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
9515        mSelectionActionMode = startActionMode(actionModeCallback);
9516        final boolean selectionStarted = mSelectionActionMode != null;
9517
9518        if (selectionStarted && !mTextIsSelectable) {
9519            // Show the IME to be able to replace text, except when selecting non editable text.
9520            final InputMethodManager imm = InputMethodManager.peekInstance();
9521            if (imm != null) imm.showSoftInput(this, 0, null);
9522        }
9523
9524        return selectionStarted;
9525    }
9526
9527    private void stopSelectionActionMode() {
9528        if (mSelectionActionMode != null) {
9529            // This will hide the mSelectionModifierCursorController
9530            mSelectionActionMode.finish();
9531        }
9532    }
9533
9534    /**
9535     * Paste clipboard content between min and max positions.
9536     */
9537    private void paste(int min, int max) {
9538        ClipboardManager clipboard =
9539            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9540        ClipData clip = clipboard.getPrimaryClip();
9541        if (clip != null) {
9542            boolean didFirst = false;
9543            for (int i=0; i<clip.getItemCount(); i++) {
9544                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
9545                if (paste != null) {
9546                    if (!didFirst) {
9547                        long minMax = prepareSpacesAroundPaste(min, max, paste);
9548                        min = extractRangeStartFromLong(minMax);
9549                        max = extractRangeEndFromLong(minMax);
9550                        Selection.setSelection((Spannable) mText, max);
9551                        ((Editable) mText).replace(min, max, paste);
9552                        didFirst = true;
9553                    } else {
9554                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9555                        ((Editable) mText).insert(getSelectionEnd(), paste);
9556                    }
9557                }
9558            }
9559            stopSelectionActionMode();
9560            sLastCutOrCopyTime = 0;
9561        }
9562    }
9563
9564    private void setPrimaryClip(ClipData clip) {
9565        ClipboardManager clipboard = (ClipboardManager) getContext().
9566                getSystemService(Context.CLIPBOARD_SERVICE);
9567        clipboard.setPrimaryClip(clip);
9568        sLastCutOrCopyTime = SystemClock.uptimeMillis();
9569    }
9570
9571    /**
9572     * An ActionMode Callback class that is used to provide actions while in text selection mode.
9573     *
9574     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
9575     * on which of these this TextView supports.
9576     */
9577    private class SelectionActionModeCallback implements ActionMode.Callback {
9578
9579        @Override
9580        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
9581            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
9582
9583            boolean allowText = getContext().getResources().getBoolean(
9584                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
9585
9586            mode.setTitle(allowText ?
9587                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
9588            mode.setSubtitle(null);
9589
9590            int selectAllIconId = 0; // No icon by default
9591            if (!allowText) {
9592                // Provide an icon, text will not be displayed on smaller screens.
9593                selectAllIconId = styledAttributes.getResourceId(
9594                        R.styleable.Theme_actionModeSelectAllDrawable, 0);
9595            }
9596
9597            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
9598                    setIcon(selectAllIconId).
9599                    setAlphabeticShortcut('a').
9600                    setShowAsAction(
9601                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9602
9603            if (canCut()) {
9604                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
9605                    setIcon(styledAttributes.getResourceId(
9606                            R.styleable.Theme_actionModeCutDrawable, 0)).
9607                    setAlphabeticShortcut('x').
9608                    setShowAsAction(
9609                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9610            }
9611
9612            if (canCopy()) {
9613                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
9614                    setIcon(styledAttributes.getResourceId(
9615                            R.styleable.Theme_actionModeCopyDrawable, 0)).
9616                    setAlphabeticShortcut('c').
9617                    setShowAsAction(
9618                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9619            }
9620
9621            if (canPaste()) {
9622                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
9623                        setIcon(styledAttributes.getResourceId(
9624                                R.styleable.Theme_actionModePasteDrawable, 0)).
9625                        setAlphabeticShortcut('v').
9626                        setShowAsAction(
9627                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9628            }
9629
9630            styledAttributes.recycle();
9631
9632            if (mCustomSelectionActionModeCallback != null) {
9633                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
9634                    // The custom mode can choose to cancel the action mode
9635                    return false;
9636                }
9637            }
9638
9639            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
9640                getSelectionController().show();
9641                return true;
9642            } else {
9643                return false;
9644            }
9645        }
9646
9647        @Override
9648        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
9649            if (mCustomSelectionActionModeCallback != null) {
9650                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
9651            }
9652            return true;
9653        }
9654
9655        @Override
9656        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
9657            if (mCustomSelectionActionModeCallback != null &&
9658                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
9659                return true;
9660            }
9661            return onTextContextMenuItem(item.getItemId());
9662        }
9663
9664        @Override
9665        public void onDestroyActionMode(ActionMode mode) {
9666            if (mCustomSelectionActionModeCallback != null) {
9667                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
9668            }
9669            Selection.setSelection((Spannable) mText, getSelectionEnd());
9670
9671            if (mSelectionModifierCursorController != null) {
9672                mSelectionModifierCursorController.hide();
9673            }
9674
9675            mSelectionActionMode = null;
9676        }
9677    }
9678
9679    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
9680        private static final int POPUP_TEXT_LAYOUT =
9681                com.android.internal.R.layout.text_edit_action_popup_text;
9682        private TextView mPasteTextView;
9683        private TextView mReplaceTextView;
9684
9685        @Override
9686        protected void createPopupWindow() {
9687            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
9688                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9689            mPopupWindow.setClippingEnabled(true);
9690        }
9691
9692        @Override
9693        protected void initContentView() {
9694            mContentView.setOrientation(LinearLayout.HORIZONTAL);
9695            mContentView.setBackgroundResource(
9696                    com.android.internal.R.drawable.text_edit_side_paste_window);
9697
9698            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9699                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9700
9701            LayoutParams wrapContent = new LayoutParams(
9702                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
9703
9704            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9705            mPasteTextView.setLayoutParams(wrapContent);
9706            mContentView.addView(mPasteTextView);
9707            mPasteTextView.setText(com.android.internal.R.string.paste);
9708            mPasteTextView.setOnClickListener(this);
9709
9710            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
9711            mReplaceTextView.setLayoutParams(wrapContent);
9712            mContentView.addView(mReplaceTextView);
9713            mReplaceTextView.setText(com.android.internal.R.string.replace);
9714            mReplaceTextView.setOnClickListener(this);
9715        }
9716
9717        @Override
9718        public void show() {
9719            boolean canPaste = canPaste();
9720            boolean suggestionsEnabled = isSuggestionsEnabled();
9721            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
9722            mReplaceTextView.setVisibility(suggestionsEnabled ? View.VISIBLE : View.GONE);
9723
9724            if (!canPaste && !suggestionsEnabled) return;
9725
9726            super.show();
9727        }
9728
9729        @Override
9730        public void onClick(View view) {
9731            if (view == mPasteTextView && canPaste()) {
9732                onTextContextMenuItem(ID_PASTE);
9733                hide();
9734            } else if (view == mReplaceTextView) {
9735                showSuggestions();
9736            }
9737        }
9738
9739        @Override
9740        protected int getTextOffset() {
9741            return (getSelectionStart() + getSelectionEnd()) / 2;
9742        }
9743
9744        @Override
9745        protected int getVerticalLocalPosition(int line) {
9746            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
9747        }
9748
9749        @Override
9750        protected int clipVertically(int positionY) {
9751            if (positionY < 0) {
9752                final int offset = getTextOffset();
9753                final int line = mLayout.getLineForOffset(offset);
9754                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
9755                positionY += mContentView.getMeasuredHeight();
9756
9757                // Assumes insertion and selection handles share the same height
9758                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
9759                positionY += handle.getIntrinsicHeight();
9760            }
9761
9762            return positionY;
9763        }
9764    }
9765
9766    private abstract class HandleView extends View implements TextViewPositionListener {
9767        protected Drawable mDrawable;
9768        private final PopupWindow mContainer;
9769        // Position with respect to the parent TextView
9770        private int mPositionX, mPositionY;
9771        private boolean mIsDragging;
9772        // Offset from touch position to mPosition
9773        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
9774        protected int mHotspotX;
9775        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
9776        private float mTouchOffsetY;
9777        // Where the touch position should be on the handle to ensure a maximum cursor visibility
9778        private float mIdealVerticalOffset;
9779        // Parent's (TextView) previous position in window
9780        private int mLastParentX, mLastParentY;
9781        // Transient action popup window for Paste and Replace actions
9782        protected ActionPopupWindow mActionPopupWindow;
9783        // Previous text character offset
9784        private int mPreviousOffset = -1;
9785        // Previous text character offset
9786        private boolean mPositionHasChanged = true;
9787        // Used to delay the appearance of the action popup window
9788        private Runnable mActionPopupShower;
9789
9790        public HandleView() {
9791            super(TextView.this.mContext);
9792            mContainer = new PopupWindow(TextView.this.mContext, null,
9793                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9794            mContainer.setSplitTouchEnabled(true);
9795            mContainer.setClippingEnabled(false);
9796            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9797            mContainer.setContentView(this);
9798
9799            initDrawable();
9800
9801            final int handleHeight = mDrawable.getIntrinsicHeight();
9802            mTouchOffsetY = -0.3f * handleHeight;
9803            mIdealVerticalOffset = 0.7f * handleHeight;
9804        }
9805
9806        protected abstract void initDrawable();
9807
9808        // Touch-up filter: number of previous positions remembered
9809        private static final int HISTORY_SIZE = 5;
9810        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
9811        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
9812        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
9813        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
9814        private int mPreviousOffsetIndex = 0;
9815        private int mNumberPreviousOffsets = 0;
9816
9817        private void startTouchUpFilter(int offset) {
9818            mNumberPreviousOffsets = 0;
9819            addPositionToTouchUpFilter(offset);
9820        }
9821
9822        private void addPositionToTouchUpFilter(int offset) {
9823            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
9824            mPreviousOffsets[mPreviousOffsetIndex] = offset;
9825            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
9826            mNumberPreviousOffsets++;
9827        }
9828
9829        private void filterOnTouchUp() {
9830            final long now = SystemClock.uptimeMillis();
9831            int i = 0;
9832            int index = mPreviousOffsetIndex;
9833            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
9834            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
9835                i++;
9836                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
9837            }
9838
9839            if (i > 0 && i < iMax &&
9840                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
9841                positionAtCursorOffset(mPreviousOffsets[index]);
9842            }
9843        }
9844
9845        public boolean offsetHasBeenChanged() {
9846            return mNumberPreviousOffsets > 1;
9847        }
9848
9849        @Override
9850        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
9851            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
9852        }
9853
9854        public void show() {
9855            if (isShowing()) return;
9856
9857            getPositionListener().addSubscriber(this, true);
9858
9859            // Make sure the offset is always considered new, even when focusing at same position
9860            mPreviousOffset = -1;
9861            positionAtCursorOffset(getCurrentCursorOffset());
9862
9863            hideActionPopupWindow();
9864        }
9865
9866        protected void dismiss() {
9867            mIsDragging = false;
9868            mContainer.dismiss();
9869            onDetached();
9870        }
9871
9872        public void hide() {
9873            dismiss();
9874
9875            TextView.this.getPositionListener().removeSubscriber(this);
9876        }
9877
9878        void showActionPopupWindow(int delay) {
9879            if (mActionPopupWindow == null) {
9880                mActionPopupWindow = new ActionPopupWindow();
9881            }
9882            if (mActionPopupShower == null) {
9883                mActionPopupShower = new Runnable() {
9884                    public void run() {
9885                        mActionPopupWindow.show();
9886                    }
9887                };
9888            } else {
9889                TextView.this.removeCallbacks(mActionPopupShower);
9890            }
9891            TextView.this.postDelayed(mActionPopupShower, delay);
9892        }
9893
9894        protected void hideActionPopupWindow() {
9895            if (mActionPopupShower != null) {
9896                TextView.this.removeCallbacks(mActionPopupShower);
9897            }
9898            if (mActionPopupWindow != null) {
9899                mActionPopupWindow.hide();
9900            }
9901        }
9902
9903        public boolean isShowing() {
9904            return mContainer.isShowing();
9905        }
9906
9907        private boolean isVisible() {
9908            // Always show a dragging handle.
9909            if (mIsDragging) {
9910                return true;
9911            }
9912
9913            if (isInBatchEditMode()) {
9914                return false;
9915            }
9916
9917            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
9918        }
9919
9920        public abstract int getCurrentCursorOffset();
9921
9922        public abstract void updateSelection(int offset);
9923
9924        public abstract void updatePosition(float x, float y);
9925
9926        protected void positionAtCursorOffset(int offset) {
9927            // A HandleView relies on the layout, which may be nulled by external methods
9928            if (mLayout == null) {
9929                // Will update controllers' state, hiding them and stopping selection mode if needed
9930                prepareCursorControllers();
9931                return;
9932            }
9933
9934            if (offset != mPreviousOffset) {
9935                updateSelection(offset);
9936                addPositionToTouchUpFilter(offset);
9937                final int line = mLayout.getLineForOffset(offset);
9938
9939                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
9940                mPositionY = mLayout.getLineBottom(line);
9941
9942                // Take TextView's padding into account.
9943                mPositionX += viewportToContentHorizontalOffset();
9944                mPositionY += viewportToContentVerticalOffset();
9945
9946                mPreviousOffset = offset;
9947                mPositionHasChanged = true;
9948            }
9949        }
9950
9951        public void updatePosition(int parentPositionX, int parentPositionY, boolean modified) {
9952            positionAtCursorOffset(getCurrentCursorOffset());
9953            if (modified || mPositionHasChanged) {
9954                if (mIsDragging) {
9955                    // Update touchToWindow offset in case of parent scrolling while dragging
9956                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
9957                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
9958                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
9959                        mLastParentX = parentPositionX;
9960                        mLastParentY = parentPositionY;
9961                    }
9962
9963                    onHandleMoved();
9964                }
9965
9966                if (isVisible()) {
9967                    final int positionX = parentPositionX + mPositionX;
9968                    final int positionY = parentPositionY + mPositionY;
9969                    if (isShowing()) {
9970                        mContainer.update(positionX, positionY, -1, -1);
9971                    } else {
9972                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9973                                positionX, positionY);
9974                    }
9975                } else {
9976                    if (isShowing()) {
9977                        dismiss();
9978                    }
9979                }
9980
9981                mPositionHasChanged = false;
9982            }
9983        }
9984
9985        @Override
9986        protected void onDraw(Canvas c) {
9987            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
9988            mDrawable.draw(c);
9989        }
9990
9991        @Override
9992        public boolean onTouchEvent(MotionEvent ev) {
9993            switch (ev.getActionMasked()) {
9994                case MotionEvent.ACTION_DOWN: {
9995                    startTouchUpFilter(getCurrentCursorOffset());
9996                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
9997                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
9998
9999                    final PositionListener positionListener = getPositionListener();
10000                    mLastParentX = positionListener.getPositionX();
10001                    mLastParentY = positionListener.getPositionY();
10002                    mIsDragging = true;
10003                    break;
10004                }
10005
10006                case MotionEvent.ACTION_MOVE: {
10007                    final float rawX = ev.getRawX();
10008                    final float rawY = ev.getRawY();
10009
10010                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10011                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10012                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10013                    float newVerticalOffset;
10014                    if (previousVerticalOffset < mIdealVerticalOffset) {
10015                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10016                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10017                    } else {
10018                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10019                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10020                    }
10021                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10022
10023                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10024                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10025
10026                    updatePosition(newPosX, newPosY);
10027                    break;
10028                }
10029
10030                case MotionEvent.ACTION_UP:
10031                    filterOnTouchUp();
10032                    mIsDragging = false;
10033                    break;
10034
10035                case MotionEvent.ACTION_CANCEL:
10036                    mIsDragging = false;
10037                    break;
10038            }
10039            return true;
10040        }
10041
10042        public boolean isDragging() {
10043            return mIsDragging;
10044        }
10045
10046        void onHandleMoved() {
10047            hideActionPopupWindow();
10048        }
10049
10050        public void onDetached() {
10051            hideActionPopupWindow();
10052        }
10053    }
10054
10055    private class InsertionHandleView extends HandleView {
10056        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10057        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10058
10059        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10060        private float mDownPositionX, mDownPositionY;
10061        private Runnable mHider;
10062
10063        @Override
10064        public void show() {
10065            super.show();
10066            hideAfterDelay();
10067        }
10068
10069        public void show(int delayBeforeShowActionPopup) {
10070            show();
10071
10072            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10073            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10074                delayBeforeShowActionPopup = 0;
10075            }
10076            showActionPopupWindow(delayBeforeShowActionPopup);
10077        }
10078
10079        private void hideAfterDelay() {
10080            removeHiderCallback();
10081            if (mHider == null) {
10082                mHider = new Runnable() {
10083                    public void run() {
10084                        hide();
10085                    }
10086                };
10087            }
10088            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10089        }
10090
10091        private void removeHiderCallback() {
10092            if (mHider != null) {
10093                TextView.this.removeCallbacks(mHider);
10094            }
10095        }
10096
10097        @Override
10098        protected void initDrawable() {
10099            if (mSelectHandleCenter == null) {
10100                mSelectHandleCenter = mContext.getResources().getDrawable(
10101                        mTextSelectHandleRes);
10102            }
10103            mDrawable = mSelectHandleCenter;
10104            mHotspotX = mDrawable.getIntrinsicWidth() / 2;
10105        }
10106
10107        @Override
10108        public boolean onTouchEvent(MotionEvent ev) {
10109            final boolean result = super.onTouchEvent(ev);
10110
10111            switch (ev.getActionMasked()) {
10112                case MotionEvent.ACTION_DOWN:
10113                    mDownPositionX = ev.getRawX();
10114                    mDownPositionY = ev.getRawY();
10115                    break;
10116
10117                case MotionEvent.ACTION_UP:
10118                    if (!offsetHasBeenChanged()) {
10119                        final float deltaX = mDownPositionX - ev.getRawX();
10120                        final float deltaY = mDownPositionY - ev.getRawY();
10121                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10122                        if (distanceSquared < mSquaredTouchSlopDistance) {
10123                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10124                                // Tapping on the handle dismisses the displayed action popup
10125                                mActionPopupWindow.hide();
10126                            } else {
10127                                show(0);
10128                            }
10129                        }
10130                    }
10131                    hideAfterDelay();
10132                    break;
10133
10134                case MotionEvent.ACTION_CANCEL:
10135                    hideAfterDelay();
10136                    break;
10137
10138                default:
10139                    break;
10140            }
10141
10142            return result;
10143        }
10144
10145        @Override
10146        public int getCurrentCursorOffset() {
10147            return TextView.this.getSelectionStart();
10148        }
10149
10150        @Override
10151        public void updateSelection(int offset) {
10152            Selection.setSelection((Spannable) mText, offset);
10153        }
10154
10155        @Override
10156        public void updatePosition(float x, float y) {
10157            positionAtCursorOffset(getOffsetForPosition(x, y));
10158        }
10159
10160        @Override
10161        void onHandleMoved() {
10162            super.onHandleMoved();
10163            removeHiderCallback();
10164        }
10165
10166        @Override
10167        public void onDetached() {
10168            super.onDetached();
10169            removeHiderCallback();
10170        }
10171    }
10172
10173    private class SelectionStartHandleView extends HandleView {
10174        @Override
10175        protected void initDrawable() {
10176            if (mSelectHandleLeft == null) {
10177                mSelectHandleLeft = mContext.getResources().getDrawable(
10178                        mTextSelectHandleLeftRes);
10179            }
10180            mDrawable = mSelectHandleLeft;
10181            mHotspotX = (mDrawable.getIntrinsicWidth() * 3) / 4;
10182        }
10183
10184        @Override
10185        public int getCurrentCursorOffset() {
10186            return TextView.this.getSelectionStart();
10187        }
10188
10189        @Override
10190        public void updateSelection(int offset) {
10191            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10192        }
10193
10194        @Override
10195        public void updatePosition(float x, float y) {
10196            final int selectionStart = getSelectionStart();
10197            final int selectionEnd = getSelectionEnd();
10198
10199            int offset = getOffsetForPosition(x, y);
10200
10201            // No need to redraw when the offset is unchanged
10202            if (offset == selectionStart) return;
10203            // Handles can not cross and selection is at least one character
10204            if (offset >= selectionEnd) offset = selectionEnd - 1;
10205
10206            positionAtCursorOffset(offset);
10207        }
10208
10209        public ActionPopupWindow getActionPopupWindow() {
10210            return mActionPopupWindow;
10211        }
10212    }
10213
10214    private class SelectionEndHandleView extends HandleView {
10215        @Override
10216        protected void initDrawable() {
10217            if (mSelectHandleRight == null) {
10218                mSelectHandleRight = mContext.getResources().getDrawable(
10219                        mTextSelectHandleRightRes);
10220            }
10221            mDrawable = mSelectHandleRight;
10222            mHotspotX = mDrawable.getIntrinsicWidth() / 4;
10223        }
10224
10225        @Override
10226        public int getCurrentCursorOffset() {
10227            return TextView.this.getSelectionEnd();
10228        }
10229
10230        @Override
10231        public void updateSelection(int offset) {
10232            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10233        }
10234
10235        @Override
10236        public void updatePosition(float x, float y) {
10237            final int selectionStart = getSelectionStart();
10238            final int selectionEnd = getSelectionEnd();
10239
10240            int offset = getOffsetForPosition(x, y);
10241
10242            // No need to redraw when the offset is unchanged
10243            if (offset == selectionEnd) return;
10244            // Handles can not cross and selection is at least one character
10245            if (offset <= selectionStart) offset = selectionStart + 1;
10246
10247            positionAtCursorOffset(offset);
10248        }
10249
10250        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10251            mActionPopupWindow = actionPopupWindow;
10252        }
10253    }
10254
10255    /**
10256     * A CursorController instance can be used to control a cursor in the text.
10257     * It is not used outside of {@link TextView}.
10258     * @hide
10259     */
10260    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10261        /**
10262         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10263         * See also {@link #hide()}.
10264         */
10265        public void show();
10266
10267        /**
10268         * Hide the cursor controller from screen.
10269         * See also {@link #show()}.
10270         */
10271        public void hide();
10272
10273        /**
10274         * Called when the view is detached from window. Perform house keeping task, such as
10275         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10276         * preventing the activity from being recycled.
10277         */
10278        public void onDetached();
10279    }
10280
10281    private class InsertionPointCursorController implements CursorController {
10282        private static final int DELAY_BEFORE_PASTE_ACTION = 1600;
10283
10284        private InsertionHandleView mHandle;
10285
10286        public void show() {
10287            getHandle().show(DELAY_BEFORE_PASTE_ACTION);
10288        }
10289
10290        public void showImmediately() {
10291            getHandle().show(0);
10292        }
10293
10294        public void hide() {
10295            if (mHandle != null) {
10296                mHandle.hide();
10297            }
10298        }
10299
10300        public void onTouchModeChanged(boolean isInTouchMode) {
10301            if (!isInTouchMode) {
10302                hide();
10303            }
10304        }
10305
10306        private InsertionHandleView getHandle() {
10307            if (mHandle == null) {
10308                mHandle = new InsertionHandleView();
10309            }
10310            return mHandle;
10311        }
10312
10313        @Override
10314        public void onDetached() {
10315            final ViewTreeObserver observer = getViewTreeObserver();
10316            observer.removeOnTouchModeChangeListener(this);
10317
10318            if (mHandle != null) mHandle.onDetached();
10319        }
10320    }
10321
10322    private class SelectionModifierCursorController implements CursorController {
10323        private static final int DELAY_BEFORE_REPLACE_ACTION = 1200;
10324        // The cursor controller handles, lazily created when shown.
10325        private SelectionStartHandleView mStartHandle;
10326        private SelectionEndHandleView mEndHandle;
10327        // The offsets of that last touch down event. Remembered to start selection there.
10328        private int mMinTouchOffset, mMaxTouchOffset;
10329
10330        // Double tap detection
10331        private long mPreviousTapUpTime = 0;
10332        private float mPreviousTapPositionX, mPreviousTapPositionY;
10333
10334        SelectionModifierCursorController() {
10335            resetTouchOffsets();
10336        }
10337
10338        public void show() {
10339            if (isInBatchEditMode()) {
10340                return;
10341            }
10342
10343            // Lazy object creation has to be done before updatePosition() is called.
10344            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
10345            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
10346
10347            mStartHandle.show();
10348            mEndHandle.show();
10349
10350            // Make sure both left and right handles share the same ActionPopupWindow (so that
10351            // moving any of the handles hides the action popup).
10352            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
10353            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
10354
10355            hideInsertionPointCursorController();
10356            hideSuggestions();
10357        }
10358
10359        public void hide() {
10360            if (mStartHandle != null) mStartHandle.hide();
10361            if (mEndHandle != null) mEndHandle.hide();
10362        }
10363
10364        public void onTouchEvent(MotionEvent event) {
10365            // This is done even when the View does not have focus, so that long presses can start
10366            // selection and tap can move cursor from this tap position.
10367            switch (event.getActionMasked()) {
10368                case MotionEvent.ACTION_DOWN:
10369                    final float x = event.getX();
10370                    final float y = event.getY();
10371
10372                    // Remember finger down position, to be able to start selection from there
10373                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
10374
10375                    // Double tap detection
10376                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
10377                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
10378                            isPositionOnText(x, y)) {
10379                        final float deltaX = x - mPreviousTapPositionX;
10380                        final float deltaY = y - mPreviousTapPositionY;
10381                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10382                        if (distanceSquared < mSquaredTouchSlopDistance) {
10383                            startSelectionActionMode();
10384                            mDiscardNextActionUp = true;
10385                        }
10386                    }
10387
10388                    mPreviousTapPositionX = x;
10389                    mPreviousTapPositionY = y;
10390                    break;
10391
10392                case MotionEvent.ACTION_POINTER_DOWN:
10393                case MotionEvent.ACTION_POINTER_UP:
10394                    // Handle multi-point gestures. Keep min and max offset positions.
10395                    // Only activated for devices that correctly handle multi-touch.
10396                    if (mContext.getPackageManager().hasSystemFeature(
10397                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
10398                        updateMinAndMaxOffsets(event);
10399                    }
10400                    break;
10401
10402                case MotionEvent.ACTION_UP:
10403                    mPreviousTapUpTime = SystemClock.uptimeMillis();
10404                    break;
10405            }
10406        }
10407
10408        /**
10409         * @param event
10410         */
10411        private void updateMinAndMaxOffsets(MotionEvent event) {
10412            int pointerCount = event.getPointerCount();
10413            for (int index = 0; index < pointerCount; index++) {
10414                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
10415                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
10416                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
10417            }
10418        }
10419
10420        public int getMinTouchOffset() {
10421            return mMinTouchOffset;
10422        }
10423
10424        public int getMaxTouchOffset() {
10425            return mMaxTouchOffset;
10426        }
10427
10428        public void resetTouchOffsets() {
10429            mMinTouchOffset = mMaxTouchOffset = -1;
10430        }
10431
10432        /**
10433         * @return true iff this controller is currently used to move the selection start.
10434         */
10435        public boolean isSelectionStartDragged() {
10436            return mStartHandle != null && mStartHandle.isDragging();
10437        }
10438
10439        public void onTouchModeChanged(boolean isInTouchMode) {
10440            if (!isInTouchMode) {
10441                hide();
10442            }
10443        }
10444
10445        @Override
10446        public void onDetached() {
10447            final ViewTreeObserver observer = getViewTreeObserver();
10448            observer.removeOnTouchModeChangeListener(this);
10449
10450            if (mStartHandle != null) mStartHandle.onDetached();
10451            if (mEndHandle != null) mEndHandle.onDetached();
10452        }
10453    }
10454
10455    private void hideInsertionPointCursorController() {
10456        // No need to create the controller to hide it.
10457        if (mInsertionPointCursorController != null) {
10458            mInsertionPointCursorController.hide();
10459        }
10460    }
10461
10462    /**
10463     * Hides the insertion controller and stops text selection mode, hiding the selection controller
10464     */
10465    private void hideControllers() {
10466        hideInsertionPointCursorController();
10467        stopSelectionActionMode();
10468        hideSuggestions();
10469    }
10470
10471    /**
10472     * Get the character offset closest to the specified absolute position. A typical use case is to
10473     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
10474     *
10475     * @param x The horizontal absolute position of a point on screen
10476     * @param y The vertical absolute position of a point on screen
10477     * @return the character offset for the character whose position is closest to the specified
10478     *  position. Returns -1 if there is no layout.
10479     */
10480    public int getOffsetForPosition(float x, float y) {
10481        if (getLayout() == null) return -1;
10482        final int line = getLineAtCoordinate(y);
10483        final int offset = getOffsetAtCoordinate(line, x);
10484        return offset;
10485    }
10486
10487    private float convertToLocalHorizontalCoordinate(float x) {
10488        x -= getTotalPaddingLeft();
10489        // Clamp the position to inside of the view.
10490        x = Math.max(0.0f, x);
10491        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
10492        x += getScrollX();
10493        return x;
10494    }
10495
10496    private int getLineAtCoordinate(float y) {
10497        y -= getTotalPaddingTop();
10498        // Clamp the position to inside of the view.
10499        y = Math.max(0.0f, y);
10500        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
10501        y += getScrollY();
10502        return getLayout().getLineForVertical((int) y);
10503    }
10504
10505    private int getOffsetAtCoordinate(int line, float x) {
10506        x = convertToLocalHorizontalCoordinate(x);
10507        return getLayout().getOffsetForHorizontal(line, x);
10508    }
10509
10510    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
10511     * in the view. Returns false when the position is in the empty space of left/right of text.
10512     */
10513    private boolean isPositionOnText(float x, float y) {
10514        if (getLayout() == null) return false;
10515
10516        final int line = getLineAtCoordinate(y);
10517        x = convertToLocalHorizontalCoordinate(x);
10518
10519        if (x < getLayout().getLineLeft(line)) return false;
10520        if (x > getLayout().getLineRight(line)) return false;
10521        return true;
10522    }
10523
10524    @Override
10525    public boolean onDragEvent(DragEvent event) {
10526        switch (event.getAction()) {
10527            case DragEvent.ACTION_DRAG_STARTED:
10528                return hasInsertionController();
10529
10530            case DragEvent.ACTION_DRAG_ENTERED:
10531                TextView.this.requestFocus();
10532                return true;
10533
10534            case DragEvent.ACTION_DRAG_LOCATION:
10535                final int offset = getOffsetForPosition(event.getX(), event.getY());
10536                Selection.setSelection((Spannable)mText, offset);
10537                return true;
10538
10539            case DragEvent.ACTION_DROP:
10540                onDrop(event);
10541                return true;
10542
10543            case DragEvent.ACTION_DRAG_ENDED:
10544            case DragEvent.ACTION_DRAG_EXITED:
10545            default:
10546                return true;
10547        }
10548    }
10549
10550    private void onDrop(DragEvent event) {
10551        StringBuilder content = new StringBuilder("");
10552        ClipData clipData = event.getClipData();
10553        final int itemCount = clipData.getItemCount();
10554        for (int i=0; i < itemCount; i++) {
10555            Item item = clipData.getItemAt(i);
10556            content.append(item.coerceToText(TextView.this.mContext));
10557        }
10558
10559        final int offset = getOffsetForPosition(event.getX(), event.getY());
10560
10561        Object localState = event.getLocalState();
10562        DragLocalState dragLocalState = null;
10563        if (localState instanceof DragLocalState) {
10564            dragLocalState = (DragLocalState) localState;
10565        }
10566        boolean dragDropIntoItself = dragLocalState != null &&
10567                dragLocalState.sourceTextView == this;
10568
10569        if (dragDropIntoItself) {
10570            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
10571                // A drop inside the original selection discards the drop.
10572                return;
10573            }
10574        }
10575
10576        final int originalLength = mText.length();
10577        long minMax = prepareSpacesAroundPaste(offset, offset, content);
10578        int min = extractRangeStartFromLong(minMax);
10579        int max = extractRangeEndFromLong(minMax);
10580
10581        Selection.setSelection((Spannable) mText, max);
10582        ((Editable) mText).replace(min, max, content);
10583
10584        if (dragDropIntoItself) {
10585            int dragSourceStart = dragLocalState.start;
10586            int dragSourceEnd = dragLocalState.end;
10587            if (max <= dragSourceStart) {
10588                // Inserting text before selection has shifted positions
10589                final int shift = mText.length() - originalLength;
10590                dragSourceStart += shift;
10591                dragSourceEnd += shift;
10592            }
10593
10594            // Delete original selection
10595            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
10596
10597            // Make sure we do not leave two adjacent spaces.
10598            if ((dragSourceStart == 0 ||
10599                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
10600                    (dragSourceStart == mText.length() ||
10601                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
10602                final int pos = dragSourceStart == mText.length() ?
10603                        dragSourceStart - 1 : dragSourceStart;
10604                ((Editable) mText).delete(pos, pos + 1);
10605            }
10606        }
10607    }
10608
10609    /**
10610     * @return True if this view supports insertion handles.
10611     */
10612    boolean hasInsertionController() {
10613        return mInsertionControllerEnabled;
10614    }
10615
10616    /**
10617     * @return True if this view supports selection handles.
10618     */
10619    boolean hasSelectionController() {
10620        return mSelectionControllerEnabled;
10621    }
10622
10623    InsertionPointCursorController getInsertionController() {
10624        if (!mInsertionControllerEnabled) {
10625            return null;
10626        }
10627
10628        if (mInsertionPointCursorController == null) {
10629            mInsertionPointCursorController = new InsertionPointCursorController();
10630
10631            final ViewTreeObserver observer = getViewTreeObserver();
10632            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
10633        }
10634
10635        return mInsertionPointCursorController;
10636    }
10637
10638    SelectionModifierCursorController getSelectionController() {
10639        if (!mSelectionControllerEnabled) {
10640            return null;
10641        }
10642
10643        if (mSelectionModifierCursorController == null) {
10644            mSelectionModifierCursorController = new SelectionModifierCursorController();
10645
10646            final ViewTreeObserver observer = getViewTreeObserver();
10647            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
10648        }
10649
10650        return mSelectionModifierCursorController;
10651    }
10652
10653    boolean isInBatchEditMode() {
10654        final InputMethodState ims = mInputMethodState;
10655        if (ims != null) {
10656            return ims.mBatchEditNesting > 0;
10657        }
10658        return mInBatchEditControllers;
10659    }
10660
10661    private class TextViewDirectionHeuristic extends TextDirectionHeuristicImpl {
10662        private TextViewDirectionHeuristic(TextDirectionAlgorithm algorithm) {
10663            super(algorithm);
10664        }
10665        @Override
10666        protected boolean defaultIsRtl() {
10667            return getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL;
10668        }
10669    }
10670
10671    /**
10672     * Resolve the text direction.
10673     *
10674     * Text direction of paragraphs in a TextView is determined using a heuristic. If the correct
10675     * text direction cannot be determined by the heuristic, the view's resolved layout direction
10676     * determines the direction.
10677     *
10678     * This heuristic and result is applied individually to each paragraph in a TextView, based on
10679     * the text and style content of that paragraph. Paragraph text styles can also be used to force
10680     * a particular direction.
10681     */
10682    @Override
10683    protected void resolveTextDirection() {
10684        super.resolveTextDirection();
10685
10686        int textDir = getResolvedTextDirection();
10687        switch (textDir) {
10688            default:
10689            case TEXT_DIRECTION_FIRST_STRONG:
10690                mTextDir = new TextViewDirectionHeuristic(FirstStrong.INSTANCE);
10691                break;
10692            case TEXT_DIRECTION_ANY_RTL:
10693                mTextDir = new TextViewDirectionHeuristic(AnyStrong.INSTANCE_RTL);
10694                break;
10695            case TEXT_DIRECTION_CHAR_COUNT:
10696                mTextDir = new TextViewDirectionHeuristic(CharCount.INSTANCE_DEFAULT);
10697                break;
10698            case TEXT_DIRECTION_LTR:
10699                mTextDir = TextDirectionHeuristics.LTR;
10700                break;
10701            case TEXT_DIRECTION_RTL:
10702                mTextDir = TextDirectionHeuristics.RTL;
10703                break;
10704        }
10705
10706    }
10707
10708    /**
10709     * Subclasses will need to override this method to implement their own way of resolving
10710     * drawables depending on the layout direction.
10711     *
10712     * A call to the super method will be required from the subclasses implementation.
10713     *
10714     */
10715    protected void resolveDrawables() {
10716        // No need to resolve twice
10717        if (mResolvedDrawables) {
10718            return;
10719        }
10720        // No drawable to resolve
10721        if (mDrawables == null) {
10722            return;
10723        }
10724        // No relative drawable to resolve
10725        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
10726            mResolvedDrawables = true;
10727            return;
10728        }
10729
10730        Drawables dr = mDrawables;
10731        switch(getResolvedLayoutDirection()) {
10732            case LAYOUT_DIRECTION_RTL:
10733                if (dr.mDrawableStart != null) {
10734                    dr.mDrawableRight = dr.mDrawableStart;
10735
10736                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
10737                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
10738                }
10739                if (dr.mDrawableEnd != null) {
10740                    dr.mDrawableLeft = dr.mDrawableEnd;
10741
10742                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
10743                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
10744                }
10745                break;
10746
10747            case LAYOUT_DIRECTION_LTR:
10748            default:
10749                if (dr.mDrawableStart != null) {
10750                    dr.mDrawableLeft = dr.mDrawableStart;
10751
10752                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
10753                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
10754                }
10755                if (dr.mDrawableEnd != null) {
10756                    dr.mDrawableRight = dr.mDrawableEnd;
10757
10758                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
10759                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
10760                }
10761                break;
10762        }
10763        mResolvedDrawables = true;
10764    }
10765
10766    protected void resetResolvedDrawables() {
10767        mResolvedDrawables = false;
10768    }
10769
10770    @ViewDebug.ExportedProperty(category = "text")
10771    private CharSequence            mText;
10772    private CharSequence            mTransformed;
10773    private BufferType              mBufferType = BufferType.NORMAL;
10774
10775    private int                     mInputType = EditorInfo.TYPE_NULL;
10776    private CharSequence            mHint;
10777    private Layout                  mHintLayout;
10778
10779    private KeyListener             mInput;
10780
10781    private MovementMethod          mMovement;
10782    private TransformationMethod    mTransformation;
10783    private boolean                 mAllowTransformationLengthChange;
10784    private ChangeWatcher           mChangeWatcher;
10785
10786    private ArrayList<TextWatcher>  mListeners = null;
10787
10788    // display attributes
10789    private final TextPaint         mTextPaint;
10790    private boolean                 mUserSetTextScaleX;
10791    private final Paint             mHighlightPaint;
10792    private int                     mHighlightColor = 0xCC475925;
10793    /**
10794     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
10795     * this field being protected. Will be restored as private when lineHeight
10796     * feature request 3215097 is implemented
10797     * @hide
10798     */
10799    protected Layout                mLayout;
10800
10801    private long                    mShowCursor;
10802    private Blink                   mBlink;
10803    private boolean                 mCursorVisible = true;
10804
10805    // Cursor Controllers.
10806    private InsertionPointCursorController mInsertionPointCursorController;
10807    private SelectionModifierCursorController mSelectionModifierCursorController;
10808    private ActionMode              mSelectionActionMode;
10809    private boolean                 mInsertionControllerEnabled;
10810    private boolean                 mSelectionControllerEnabled;
10811    private boolean                 mInBatchEditControllers;
10812
10813    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
10814    // select from the current cursor position. Otherwise, select from long pressed position.
10815    private boolean                 mDPadCenterIsDown = false;
10816    private boolean                 mEnterKeyIsDown = false;
10817    private boolean                 mContextMenuTriggeredByKey = false;
10818
10819    private boolean                 mSelectAllOnFocus = false;
10820
10821    private int                     mGravity = Gravity.TOP | Gravity.START;
10822    private boolean                 mHorizontallyScrolling;
10823
10824    private int                     mAutoLinkMask;
10825    private boolean                 mLinksClickable = true;
10826
10827    private float                   mSpacingMult = 1;
10828    private float                   mSpacingAdd = 0;
10829    private boolean                 mTextIsSelectable = false;
10830
10831    private static final int        LINES = 1;
10832    private static final int        EMS = LINES;
10833    private static final int        PIXELS = 2;
10834
10835    private int                     mMaximum = Integer.MAX_VALUE;
10836    private int                     mMaxMode = LINES;
10837    private int                     mMinimum = 0;
10838    private int                     mMinMode = LINES;
10839
10840    private int                     mMaxWidth = Integer.MAX_VALUE;
10841    private int                     mMaxWidthMode = PIXELS;
10842    private int                     mMinWidth = 0;
10843    private int                     mMinWidthMode = PIXELS;
10844
10845    private boolean                 mSingleLine;
10846    private int                     mDesiredHeightAtMeasure = -1;
10847    private boolean                 mIncludePad = true;
10848
10849    // tmp primitives, so we don't alloc them on each draw
10850    private Path                    mHighlightPath;
10851    private boolean                 mHighlightPathBogus = true;
10852    private static final RectF      sTempRect = new RectF();
10853
10854    // XXX should be much larger
10855    private static final int        VERY_WIDE = 16384;
10856
10857    private static final int        BLINK = 500;
10858
10859    private static final int ANIMATED_SCROLL_GAP = 250;
10860    private long mLastScroll;
10861    private Scroller mScroller = null;
10862
10863    private BoringLayout.Metrics mBoring;
10864    private BoringLayout.Metrics mHintBoring;
10865
10866    private BoringLayout mSavedLayout, mSavedHintLayout;
10867
10868    private TextDirectionHeuristic mTextDir = null;
10869
10870    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
10871    private InputFilter[] mFilters = NO_FILTERS;
10872    private static final Spanned EMPTY_SPANNED = new SpannedString("");
10873    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
10874    // System wide time for last cut or copy action.
10875    private static long sLastCutOrCopyTime;
10876    // Used to highlight a word when it is corrected by the IME
10877    private CorrectionHighlighter mCorrectionHighlighter;
10878    // New state used to change background based on whether this TextView is multiline.
10879    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
10880}
10881