TextView.java revision 961ebb9ab0a6d45b06a74aa90894f7fda3d528c6 
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.Intent;
25import android.content.pm.PackageManager;
26import android.content.res.ColorStateList;
27import android.content.res.CompatibilityInfo;
28import android.content.res.Resources;
29import android.content.res.TypedArray;
30import android.content.res.XmlResourceParser;
31import android.graphics.Canvas;
32import android.graphics.Color;
33import android.graphics.Paint;
34import android.graphics.Path;
35import android.graphics.Rect;
36import android.graphics.RectF;
37import android.graphics.Typeface;
38import android.graphics.drawable.Drawable;
39import android.inputmethodservice.ExtractEditText;
40import android.os.Bundle;
41import android.os.Handler;
42import android.os.Message;
43import android.os.Parcel;
44import android.os.Parcelable;
45import android.os.SystemClock;
46import android.provider.Settings;
47import android.text.BoringLayout;
48import android.text.DynamicLayout;
49import android.text.Editable;
50import android.text.GetChars;
51import android.text.GraphicsOperations;
52import android.text.InputFilter;
53import android.text.InputType;
54import android.text.Layout;
55import android.text.ParcelableSpan;
56import android.text.Selection;
57import android.text.SpanWatcher;
58import android.text.Spannable;
59import android.text.SpannableString;
60import android.text.SpannableStringBuilder;
61import android.text.Spanned;
62import android.text.SpannedString;
63import android.text.StaticLayout;
64import android.text.TextDirectionHeuristic;
65import android.text.TextDirectionHeuristics;
66import android.text.TextPaint;
67import android.text.TextUtils;
68import android.text.TextUtils.TruncateAt;
69import android.text.TextWatcher;
70import android.text.method.AllCapsTransformationMethod;
71import android.text.method.ArrowKeyMovementMethod;
72import android.text.method.DateKeyListener;
73import android.text.method.DateTimeKeyListener;
74import android.text.method.DialerKeyListener;
75import android.text.method.DigitsKeyListener;
76import android.text.method.KeyListener;
77import android.text.method.LinkMovementMethod;
78import android.text.method.MetaKeyKeyListener;
79import android.text.method.MovementMethod;
80import android.text.method.PasswordTransformationMethod;
81import android.text.method.SingleLineTransformationMethod;
82import android.text.method.TextKeyListener;
83import android.text.method.TimeKeyListener;
84import android.text.method.TransformationMethod;
85import android.text.method.TransformationMethod2;
86import android.text.method.WordIterator;
87import android.text.style.ClickableSpan;
88import android.text.style.EasyEditSpan;
89import android.text.style.ParagraphStyle;
90import android.text.style.SpellCheckSpan;
91import android.text.style.SuggestionRangeSpan;
92import android.text.style.SuggestionSpan;
93import android.text.style.TextAppearanceSpan;
94import android.text.style.URLSpan;
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.DragEvent;
105import android.view.Gravity;
106import android.view.HapticFeedbackConstants;
107import android.view.KeyCharacterMap;
108import android.view.KeyEvent;
109import android.view.LayoutInflater;
110import android.view.Menu;
111import android.view.MenuItem;
112import android.view.MotionEvent;
113import android.view.View;
114import android.view.ViewConfiguration;
115import android.view.ViewDebug;
116import android.view.ViewGroup;
117import android.view.ViewGroup.LayoutParams;
118import android.view.ViewParent;
119import android.view.ViewRootImpl;
120import android.view.ViewTreeObserver;
121import android.view.WindowManager;
122import android.view.accessibility.AccessibilityEvent;
123import android.view.accessibility.AccessibilityManager;
124import android.view.accessibility.AccessibilityNodeInfo;
125import android.view.animation.AnimationUtils;
126import android.view.inputmethod.BaseInputConnection;
127import android.view.inputmethod.CompletionInfo;
128import android.view.inputmethod.CorrectionInfo;
129import android.view.inputmethod.EditorInfo;
130import android.view.inputmethod.ExtractedText;
131import android.view.inputmethod.ExtractedTextRequest;
132import android.view.inputmethod.InputConnection;
133import android.view.inputmethod.InputMethodManager;
134import android.view.textservice.SpellCheckerSubtype;
135import android.view.textservice.TextServicesManager;
136import android.widget.AdapterView.OnItemClickListener;
137import android.widget.RemoteViews.RemoteView;
138
139import com.android.internal.util.FastMath;
140import com.android.internal.widget.EditableInputConnection;
141
142import org.xmlpull.v1.XmlPullParserException;
143
144import java.io.IOException;
145import java.lang.ref.WeakReference;
146import java.text.BreakIterator;
147import java.util.ArrayList;
148import java.util.Arrays;
149import java.util.Comparator;
150import java.util.HashMap;
151import java.util.Locale;
152
153/**
154 * Displays text to the user and optionally allows them to edit it.  A TextView
155 * is a complete text editor, however the basic class is configured to not
156 * allow editing; see {@link EditText} for a subclass that configures the text
157 * view for editing.
158 *
159 * <p>
160 * <b>XML attributes</b>
161 * <p>
162 * See {@link android.R.styleable#TextView TextView Attributes},
163 * {@link android.R.styleable#View View Attributes}
164 *
165 * @attr ref android.R.styleable#TextView_text
166 * @attr ref android.R.styleable#TextView_bufferType
167 * @attr ref android.R.styleable#TextView_hint
168 * @attr ref android.R.styleable#TextView_textColor
169 * @attr ref android.R.styleable#TextView_textColorHighlight
170 * @attr ref android.R.styleable#TextView_textColorHint
171 * @attr ref android.R.styleable#TextView_textAppearance
172 * @attr ref android.R.styleable#TextView_textColorLink
173 * @attr ref android.R.styleable#TextView_textSize
174 * @attr ref android.R.styleable#TextView_textScaleX
175 * @attr ref android.R.styleable#TextView_typeface
176 * @attr ref android.R.styleable#TextView_textStyle
177 * @attr ref android.R.styleable#TextView_cursorVisible
178 * @attr ref android.R.styleable#TextView_maxLines
179 * @attr ref android.R.styleable#TextView_maxHeight
180 * @attr ref android.R.styleable#TextView_lines
181 * @attr ref android.R.styleable#TextView_height
182 * @attr ref android.R.styleable#TextView_minLines
183 * @attr ref android.R.styleable#TextView_minHeight
184 * @attr ref android.R.styleable#TextView_maxEms
185 * @attr ref android.R.styleable#TextView_maxWidth
186 * @attr ref android.R.styleable#TextView_ems
187 * @attr ref android.R.styleable#TextView_width
188 * @attr ref android.R.styleable#TextView_minEms
189 * @attr ref android.R.styleable#TextView_minWidth
190 * @attr ref android.R.styleable#TextView_gravity
191 * @attr ref android.R.styleable#TextView_scrollHorizontally
192 * @attr ref android.R.styleable#TextView_password
193 * @attr ref android.R.styleable#TextView_singleLine
194 * @attr ref android.R.styleable#TextView_selectAllOnFocus
195 * @attr ref android.R.styleable#TextView_includeFontPadding
196 * @attr ref android.R.styleable#TextView_maxLength
197 * @attr ref android.R.styleable#TextView_shadowColor
198 * @attr ref android.R.styleable#TextView_shadowDx
199 * @attr ref android.R.styleable#TextView_shadowDy
200 * @attr ref android.R.styleable#TextView_shadowRadius
201 * @attr ref android.R.styleable#TextView_autoLink
202 * @attr ref android.R.styleable#TextView_linksClickable
203 * @attr ref android.R.styleable#TextView_numeric
204 * @attr ref android.R.styleable#TextView_digits
205 * @attr ref android.R.styleable#TextView_phoneNumber
206 * @attr ref android.R.styleable#TextView_inputMethod
207 * @attr ref android.R.styleable#TextView_capitalize
208 * @attr ref android.R.styleable#TextView_autoText
209 * @attr ref android.R.styleable#TextView_editable
210 * @attr ref android.R.styleable#TextView_freezesText
211 * @attr ref android.R.styleable#TextView_ellipsize
212 * @attr ref android.R.styleable#TextView_drawableTop
213 * @attr ref android.R.styleable#TextView_drawableBottom
214 * @attr ref android.R.styleable#TextView_drawableRight
215 * @attr ref android.R.styleable#TextView_drawableLeft
216 * @attr ref android.R.styleable#TextView_drawablePadding
217 * @attr ref android.R.styleable#TextView_lineSpacingExtra
218 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
219 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
220 * @attr ref android.R.styleable#TextView_inputType
221 * @attr ref android.R.styleable#TextView_imeOptions
222 * @attr ref android.R.styleable#TextView_privateImeOptions
223 * @attr ref android.R.styleable#TextView_imeActionLabel
224 * @attr ref android.R.styleable#TextView_imeActionId
225 * @attr ref android.R.styleable#TextView_editorExtras
226 */
227@RemoteView
228public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
229    static final String LOG_TAG = "TextView";
230    static final boolean DEBUG_EXTRACT = false;
231
232    private static final int PRIORITY = 100;
233    private int mCurrentAlpha = 255;
234
235    final int[] mTempCoords = new int[2];
236    Rect mTempRect;
237
238    private ColorStateList mTextColor;
239    private int mCurTextColor;
240    private ColorStateList mHintTextColor;
241    private ColorStateList mLinkTextColor;
242    private int mCurHintTextColor;
243    private boolean mFreezesText;
244    private boolean mFrozenWithFocus;
245    private boolean mTemporaryDetach;
246    private boolean mDispatchTemporaryDetach;
247
248    private boolean mDiscardNextActionUp = false;
249    private boolean mIgnoreActionUpEvent = false;
250
251    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
252    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
253
254    private float mShadowRadius, mShadowDx, mShadowDy;
255
256    private static final int PREDRAW_NOT_REGISTERED = 0;
257    private static final int PREDRAW_PENDING = 1;
258    private static final int PREDRAW_DONE = 2;
259    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
260
261    private TextUtils.TruncateAt mEllipsize = null;
262
263    // Enum for the "typeface" XML parameter.
264    // TODO: How can we get this from the XML instead of hardcoding it here?
265    private static final int SANS = 1;
266    private static final int SERIF = 2;
267    private static final int MONOSPACE = 3;
268
269    // Bitfield for the "numeric" XML parameter.
270    // TODO: How can we get this from the XML instead of hardcoding it here?
271    private static final int SIGNED = 2;
272    private static final int DECIMAL = 4;
273
274    static class Drawables {
275        final Rect mCompoundRect = new Rect();
276        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
277                mDrawableStart, mDrawableEnd;
278        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
279                mDrawableSizeStart, mDrawableSizeEnd;
280        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
281                mDrawableHeightStart, mDrawableHeightEnd;
282        int mDrawablePadding;
283    }
284    private Drawables mDrawables;
285
286    private CharSequence mError;
287    private boolean mErrorWasChanged;
288    private ErrorPopup mPopup;
289    /**
290     * This flag is set if the TextView tries to display an error before it
291     * is attached to the window (so its position is still unknown).
292     * It causes the error to be shown later, when onAttachedToWindow()
293     * is called.
294     */
295    private boolean mShowErrorAfterAttach;
296
297    private CharWrapper mCharWrapper = null;
298
299    private boolean mSelectionMoved = false;
300    private boolean mTouchFocusSelected = false;
301
302    private Marquee mMarquee;
303    private boolean mRestartMarquee;
304
305    private int mMarqueeRepeatLimit = 3;
306
307    static class InputContentType {
308        int imeOptions = EditorInfo.IME_NULL;
309        String privateImeOptions;
310        CharSequence imeActionLabel;
311        int imeActionId;
312        Bundle extras;
313        OnEditorActionListener onEditorActionListener;
314        boolean enterDown;
315    }
316    InputContentType mInputContentType;
317
318    static class InputMethodState {
319        Rect mCursorRectInWindow = new Rect();
320        RectF mTmpRectF = new RectF();
321        float[] mTmpOffset = new float[2];
322        ExtractedTextRequest mExtracting;
323        final ExtractedText mTmpExtracted = new ExtractedText();
324        int mBatchEditNesting;
325        boolean mCursorChanged;
326        boolean mSelectionModeChanged;
327        boolean mContentChanged;
328        int mChangedStart, mChangedEnd, mChangedDelta;
329    }
330    InputMethodState mInputMethodState;
331
332    private int mTextSelectHandleLeftRes;
333    private int mTextSelectHandleRightRes;
334    private int mTextSelectHandleRes;
335
336    private int mTextEditSuggestionItemLayout;
337    private SuggestionsPopupWindow mSuggestionsPopupWindow;
338    private SuggestionRangeSpan mSuggestionRangeSpan;
339
340    private int mCursorDrawableRes;
341    private final Drawable[] mCursorDrawable = new Drawable[2];
342    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2 (split)
343
344    private Drawable mSelectHandleLeft;
345    private Drawable mSelectHandleRight;
346    private Drawable mSelectHandleCenter;
347
348    // Global listener that detects changes in the global position of the TextView
349    private PositionListener mPositionListener;
350
351    private float mLastDownPositionX, mLastDownPositionY;
352    private Callback mCustomSelectionActionModeCallback;
353
354    private final int mSquaredTouchSlopDistance;
355    // Set when this TextView gained focus with some text selected. Will start selection mode.
356    private boolean mCreatedWithASelection = false;
357
358    private WordIterator mWordIterator;
359
360    private SpellChecker mSpellChecker;
361
362    private boolean mSoftInputShownOnFocus = true;
363
364    // The alignment to pass to Layout, or null if not resolved.
365    private Layout.Alignment mLayoutAlignment;
366
367    // The default value for mTextAlign.
368    private TextAlign mTextAlign = TextAlign.INHERIT;
369
370    private static enum TextAlign {
371        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
372    }
373
374    private boolean mResolvedDrawables = false;
375
376    /**
377     * On some devices the fading edges add a performance penalty if used
378     * extensively in the same layout. This mode indicates how the marquee
379     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
380     */
381    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
382
383    /**
384     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
385     * the layout that should be used when the mode switches.
386     */
387    private Layout mSavedMarqueeModeLayout;
388
389    /**
390     * Draw marquee text with fading edges as usual
391     */
392    private static final int MARQUEE_FADE_NORMAL = 0;
393
394    /**
395     * Draw marquee text as ellipsize end while inactive instead of with the fade.
396     * (Useful for devices where the fade can be expensive if overdone)
397     */
398    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
399
400    /**
401     * Draw marquee text with fading edges because it is currently active/animating.
402     */
403    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
404
405    /*
406     * Kick-start the font cache for the zygote process (to pay the cost of
407     * initializing freetype for our default font only once).
408     */
409    static {
410        Paint p = new Paint();
411        p.setAntiAlias(true);
412        // We don't care about the result, just the side-effect of measuring.
413        p.measureText("H");
414    }
415
416    /**
417     * Interface definition for a callback to be invoked when an action is
418     * performed on the editor.
419     */
420    public interface OnEditorActionListener {
421        /**
422         * Called when an action is being performed.
423         *
424         * @param v The view that was clicked.
425         * @param actionId Identifier of the action.  This will be either the
426         * identifier you supplied, or {@link EditorInfo#IME_NULL
427         * EditorInfo.IME_NULL} if being called due to the enter key
428         * being pressed.
429         * @param event If triggered by an enter key, this is the event;
430         * otherwise, this is null.
431         * @return Return true if you have consumed the action, else false.
432         */
433        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
434    }
435
436    public TextView(Context context) {
437        this(context, null);
438    }
439
440    public TextView(Context context,
441                    AttributeSet attrs) {
442        this(context, attrs, com.android.internal.R.attr.textViewStyle);
443    }
444
445    @SuppressWarnings("deprecation")
446    public TextView(Context context,
447                    AttributeSet attrs,
448                    int defStyle) {
449        super(context, attrs, defStyle);
450        mText = "";
451
452        final Resources res = getResources();
453        final CompatibilityInfo compat = res.getCompatibilityInfo();
454
455        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
456        mTextPaint.density = res.getDisplayMetrics().density;
457        mTextPaint.setCompatibilityScaling(compat.applicationScale);
458
459        // If we get the paint from the skin, we should set it to left, since
460        // the layout always wants it to be left.
461        // mTextPaint.setTextAlign(Paint.Align.LEFT);
462
463        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
464        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
465
466        mMovement = getDefaultMovementMethod();
467        mTransformation = null;
468
469        int textColorHighlight = 0;
470        ColorStateList textColor = null;
471        ColorStateList textColorHint = null;
472        ColorStateList textColorLink = null;
473        int textSize = 15;
474        int typefaceIndex = -1;
475        int styleIndex = -1;
476        boolean allCaps = false;
477
478        final Resources.Theme theme = context.getTheme();
479
480        /*
481         * Look the appearance up without checking first if it exists because
482         * almost every TextView has one and it greatly simplifies the logic
483         * to be able to parse the appearance first and then let specific tags
484         * for this View override it.
485         */
486        TypedArray a = theme.obtainStyledAttributes(
487                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
488        TypedArray appearance = null;
489        int ap = a.getResourceId(
490                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
491        a.recycle();
492        if (ap != -1) {
493            appearance = theme.obtainStyledAttributes(
494                    ap, com.android.internal.R.styleable.TextAppearance);
495        }
496        if (appearance != null) {
497            int n = appearance.getIndexCount();
498            for (int i = 0; i < n; i++) {
499                int attr = appearance.getIndex(i);
500
501                switch (attr) {
502                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
503                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
504                    break;
505
506                case com.android.internal.R.styleable.TextAppearance_textColor:
507                    textColor = appearance.getColorStateList(attr);
508                    break;
509
510                case com.android.internal.R.styleable.TextAppearance_textColorHint:
511                    textColorHint = appearance.getColorStateList(attr);
512                    break;
513
514                case com.android.internal.R.styleable.TextAppearance_textColorLink:
515                    textColorLink = appearance.getColorStateList(attr);
516                    break;
517
518                case com.android.internal.R.styleable.TextAppearance_textSize:
519                    textSize = appearance.getDimensionPixelSize(attr, textSize);
520                    break;
521
522                case com.android.internal.R.styleable.TextAppearance_typeface:
523                    typefaceIndex = appearance.getInt(attr, -1);
524                    break;
525
526                case com.android.internal.R.styleable.TextAppearance_textStyle:
527                    styleIndex = appearance.getInt(attr, -1);
528                    break;
529
530                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
531                    allCaps = appearance.getBoolean(attr, false);
532                    break;
533                }
534            }
535
536            appearance.recycle();
537        }
538
539        boolean editable = getDefaultEditable();
540        CharSequence inputMethod = null;
541        int numeric = 0;
542        CharSequence digits = null;
543        boolean phone = false;
544        boolean autotext = false;
545        int autocap = -1;
546        int buffertype = 0;
547        boolean selectallonfocus = false;
548        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
549            drawableBottom = null, drawableStart = null, drawableEnd = null;
550        int drawablePadding = 0;
551        int ellipsize = -1;
552        boolean singleLine = false;
553        int maxlength = -1;
554        CharSequence text = "";
555        CharSequence hint = null;
556        int shadowcolor = 0;
557        float dx = 0, dy = 0, r = 0;
558        boolean password = false;
559        int inputType = EditorInfo.TYPE_NULL;
560
561        a = theme.obtainStyledAttributes(
562                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
563
564        int n = a.getIndexCount();
565        for (int i = 0; i < n; i++) {
566            int attr = a.getIndex(i);
567
568            switch (attr) {
569            case com.android.internal.R.styleable.TextView_editable:
570                editable = a.getBoolean(attr, editable);
571                break;
572
573            case com.android.internal.R.styleable.TextView_inputMethod:
574                inputMethod = a.getText(attr);
575                break;
576
577            case com.android.internal.R.styleable.TextView_numeric:
578                numeric = a.getInt(attr, numeric);
579                break;
580
581            case com.android.internal.R.styleable.TextView_digits:
582                digits = a.getText(attr);
583                break;
584
585            case com.android.internal.R.styleable.TextView_phoneNumber:
586                phone = a.getBoolean(attr, phone);
587                break;
588
589            case com.android.internal.R.styleable.TextView_autoText:
590                autotext = a.getBoolean(attr, autotext);
591                break;
592
593            case com.android.internal.R.styleable.TextView_capitalize:
594                autocap = a.getInt(attr, autocap);
595                break;
596
597            case com.android.internal.R.styleable.TextView_bufferType:
598                buffertype = a.getInt(attr, buffertype);
599                break;
600
601            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
602                selectallonfocus = a.getBoolean(attr, selectallonfocus);
603                break;
604
605            case com.android.internal.R.styleable.TextView_autoLink:
606                mAutoLinkMask = a.getInt(attr, 0);
607                break;
608
609            case com.android.internal.R.styleable.TextView_linksClickable:
610                mLinksClickable = a.getBoolean(attr, true);
611                break;
612
613//            TODO uncomment when this attribute is made public in the next release
614//                 also add TextView_showSoftInputOnFocus to the list of attributes above
615//            case com.android.internal.R.styleable.TextView_showSoftInputOnFocus:
616//                setShowSoftInputOnFocus(a.getBoolean(attr, true));
617//                break;
618
619            case com.android.internal.R.styleable.TextView_drawableLeft:
620                drawableLeft = a.getDrawable(attr);
621                break;
622
623            case com.android.internal.R.styleable.TextView_drawableTop:
624                drawableTop = a.getDrawable(attr);
625                break;
626
627            case com.android.internal.R.styleable.TextView_drawableRight:
628                drawableRight = a.getDrawable(attr);
629                break;
630
631            case com.android.internal.R.styleable.TextView_drawableBottom:
632                drawableBottom = a.getDrawable(attr);
633                break;
634
635            case com.android.internal.R.styleable.TextView_drawableStart:
636                drawableStart = a.getDrawable(attr);
637                break;
638
639            case com.android.internal.R.styleable.TextView_drawableEnd:
640                drawableEnd = a.getDrawable(attr);
641                break;
642
643            case com.android.internal.R.styleable.TextView_drawablePadding:
644                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
645                break;
646
647            case com.android.internal.R.styleable.TextView_maxLines:
648                setMaxLines(a.getInt(attr, -1));
649                break;
650
651            case com.android.internal.R.styleable.TextView_maxHeight:
652                setMaxHeight(a.getDimensionPixelSize(attr, -1));
653                break;
654
655            case com.android.internal.R.styleable.TextView_lines:
656                setLines(a.getInt(attr, -1));
657                break;
658
659            case com.android.internal.R.styleable.TextView_height:
660                setHeight(a.getDimensionPixelSize(attr, -1));
661                break;
662
663            case com.android.internal.R.styleable.TextView_minLines:
664                setMinLines(a.getInt(attr, -1));
665                break;
666
667            case com.android.internal.R.styleable.TextView_minHeight:
668                setMinHeight(a.getDimensionPixelSize(attr, -1));
669                break;
670
671            case com.android.internal.R.styleable.TextView_maxEms:
672                setMaxEms(a.getInt(attr, -1));
673                break;
674
675            case com.android.internal.R.styleable.TextView_maxWidth:
676                setMaxWidth(a.getDimensionPixelSize(attr, -1));
677                break;
678
679            case com.android.internal.R.styleable.TextView_ems:
680                setEms(a.getInt(attr, -1));
681                break;
682
683            case com.android.internal.R.styleable.TextView_width:
684                setWidth(a.getDimensionPixelSize(attr, -1));
685                break;
686
687            case com.android.internal.R.styleable.TextView_minEms:
688                setMinEms(a.getInt(attr, -1));
689                break;
690
691            case com.android.internal.R.styleable.TextView_minWidth:
692                setMinWidth(a.getDimensionPixelSize(attr, -1));
693                break;
694
695            case com.android.internal.R.styleable.TextView_gravity:
696                setGravity(a.getInt(attr, -1));
697                break;
698
699            case com.android.internal.R.styleable.TextView_hint:
700                hint = a.getText(attr);
701                break;
702
703            case com.android.internal.R.styleable.TextView_text:
704                text = a.getText(attr);
705                break;
706
707            case com.android.internal.R.styleable.TextView_scrollHorizontally:
708                if (a.getBoolean(attr, false)) {
709                    setHorizontallyScrolling(true);
710                }
711                break;
712
713            case com.android.internal.R.styleable.TextView_singleLine:
714                singleLine = a.getBoolean(attr, singleLine);
715                break;
716
717            case com.android.internal.R.styleable.TextView_ellipsize:
718                ellipsize = a.getInt(attr, ellipsize);
719                break;
720
721            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
722                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
723                break;
724
725            case com.android.internal.R.styleable.TextView_includeFontPadding:
726                if (!a.getBoolean(attr, true)) {
727                    setIncludeFontPadding(false);
728                }
729                break;
730
731            case com.android.internal.R.styleable.TextView_cursorVisible:
732                if (!a.getBoolean(attr, true)) {
733                    setCursorVisible(false);
734                }
735                break;
736
737            case com.android.internal.R.styleable.TextView_maxLength:
738                maxlength = a.getInt(attr, -1);
739                break;
740
741            case com.android.internal.R.styleable.TextView_textScaleX:
742                setTextScaleX(a.getFloat(attr, 1.0f));
743                break;
744
745            case com.android.internal.R.styleable.TextView_freezesText:
746                mFreezesText = a.getBoolean(attr, false);
747                break;
748
749            case com.android.internal.R.styleable.TextView_shadowColor:
750                shadowcolor = a.getInt(attr, 0);
751                break;
752
753            case com.android.internal.R.styleable.TextView_shadowDx:
754                dx = a.getFloat(attr, 0);
755                break;
756
757            case com.android.internal.R.styleable.TextView_shadowDy:
758                dy = a.getFloat(attr, 0);
759                break;
760
761            case com.android.internal.R.styleable.TextView_shadowRadius:
762                r = a.getFloat(attr, 0);
763                break;
764
765            case com.android.internal.R.styleable.TextView_enabled:
766                setEnabled(a.getBoolean(attr, isEnabled()));
767                break;
768
769            case com.android.internal.R.styleable.TextView_textColorHighlight:
770                textColorHighlight = a.getColor(attr, textColorHighlight);
771                break;
772
773            case com.android.internal.R.styleable.TextView_textColor:
774                textColor = a.getColorStateList(attr);
775                break;
776
777            case com.android.internal.R.styleable.TextView_textColorHint:
778                textColorHint = a.getColorStateList(attr);
779                break;
780
781            case com.android.internal.R.styleable.TextView_textColorLink:
782                textColorLink = a.getColorStateList(attr);
783                break;
784
785            case com.android.internal.R.styleable.TextView_textSize:
786                textSize = a.getDimensionPixelSize(attr, textSize);
787                break;
788
789            case com.android.internal.R.styleable.TextView_typeface:
790                typefaceIndex = a.getInt(attr, typefaceIndex);
791                break;
792
793            case com.android.internal.R.styleable.TextView_textStyle:
794                styleIndex = a.getInt(attr, styleIndex);
795                break;
796
797            case com.android.internal.R.styleable.TextView_password:
798                password = a.getBoolean(attr, password);
799                break;
800
801            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
802                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
803                break;
804
805            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
806                mSpacingMult = a.getFloat(attr, mSpacingMult);
807                break;
808
809            case com.android.internal.R.styleable.TextView_inputType:
810                inputType = a.getInt(attr, mInputType);
811                break;
812
813            case com.android.internal.R.styleable.TextView_imeOptions:
814                if (mInputContentType == null) {
815                    mInputContentType = new InputContentType();
816                }
817                mInputContentType.imeOptions = a.getInt(attr,
818                        mInputContentType.imeOptions);
819                break;
820
821            case com.android.internal.R.styleable.TextView_imeActionLabel:
822                if (mInputContentType == null) {
823                    mInputContentType = new InputContentType();
824                }
825                mInputContentType.imeActionLabel = a.getText(attr);
826                break;
827
828            case com.android.internal.R.styleable.TextView_imeActionId:
829                if (mInputContentType == null) {
830                    mInputContentType = new InputContentType();
831                }
832                mInputContentType.imeActionId = a.getInt(attr,
833                        mInputContentType.imeActionId);
834                break;
835
836            case com.android.internal.R.styleable.TextView_privateImeOptions:
837                setPrivateImeOptions(a.getString(attr));
838                break;
839
840            case com.android.internal.R.styleable.TextView_editorExtras:
841                try {
842                    setInputExtras(a.getResourceId(attr, 0));
843                } catch (XmlPullParserException e) {
844                    Log.w(LOG_TAG, "Failure reading input extras", e);
845                } catch (IOException e) {
846                    Log.w(LOG_TAG, "Failure reading input extras", e);
847                }
848                break;
849
850            case com.android.internal.R.styleable.TextView_textCursorDrawable:
851                mCursorDrawableRes = a.getResourceId(attr, 0);
852                break;
853
854            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
855                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
856                break;
857
858            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
859                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
860                break;
861
862            case com.android.internal.R.styleable.TextView_textSelectHandle:
863                mTextSelectHandleRes = a.getResourceId(attr, 0);
864                break;
865
866            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
867                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
868                break;
869
870            case com.android.internal.R.styleable.TextView_textIsSelectable:
871                mTextIsSelectable = a.getBoolean(attr, false);
872                break;
873
874            case com.android.internal.R.styleable.TextView_textAllCaps:
875                allCaps = a.getBoolean(attr, false);
876                break;
877            }
878        }
879        a.recycle();
880
881        BufferType bufferType = BufferType.EDITABLE;
882
883        final int variation =
884                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
885        final boolean passwordInputType = variation
886                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
887        final boolean webPasswordInputType = variation
888                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
889        final boolean numberPasswordInputType = variation
890                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
891
892        if (inputMethod != null) {
893            Class<?> c;
894
895            try {
896                c = Class.forName(inputMethod.toString());
897            } catch (ClassNotFoundException ex) {
898                throw new RuntimeException(ex);
899            }
900
901            try {
902                mInput = (KeyListener) c.newInstance();
903            } catch (InstantiationException ex) {
904                throw new RuntimeException(ex);
905            } catch (IllegalAccessException ex) {
906                throw new RuntimeException(ex);
907            }
908            try {
909                mInputType = inputType != EditorInfo.TYPE_NULL
910                        ? inputType
911                        : mInput.getInputType();
912            } catch (IncompatibleClassChangeError e) {
913                mInputType = EditorInfo.TYPE_CLASS_TEXT;
914            }
915        } else if (digits != null) {
916            mInput = DigitsKeyListener.getInstance(digits.toString());
917            // If no input type was specified, we will default to generic
918            // text, since we can't tell the IME about the set of digits
919            // that was selected.
920            mInputType = inputType != EditorInfo.TYPE_NULL
921                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
922        } else if (inputType != EditorInfo.TYPE_NULL) {
923            setInputType(inputType, true);
924            // If set, the input type overrides what was set using the deprecated singleLine flag.
925            singleLine = !isMultilineInputType(inputType);
926        } else if (phone) {
927            mInput = DialerKeyListener.getInstance();
928            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
929        } else if (numeric != 0) {
930            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
931                                                   (numeric & DECIMAL) != 0);
932            inputType = EditorInfo.TYPE_CLASS_NUMBER;
933            if ((numeric & SIGNED) != 0) {
934                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
935            }
936            if ((numeric & DECIMAL) != 0) {
937                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
938            }
939            mInputType = inputType;
940        } else if (autotext || autocap != -1) {
941            TextKeyListener.Capitalize cap;
942
943            inputType = EditorInfo.TYPE_CLASS_TEXT;
944
945            switch (autocap) {
946            case 1:
947                cap = TextKeyListener.Capitalize.SENTENCES;
948                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
949                break;
950
951            case 2:
952                cap = TextKeyListener.Capitalize.WORDS;
953                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
954                break;
955
956            case 3:
957                cap = TextKeyListener.Capitalize.CHARACTERS;
958                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
959                break;
960
961            default:
962                cap = TextKeyListener.Capitalize.NONE;
963                break;
964            }
965
966            mInput = TextKeyListener.getInstance(autotext, cap);
967            mInputType = inputType;
968        } else if (mTextIsSelectable) {
969            // Prevent text changes from keyboard.
970            mInputType = EditorInfo.TYPE_NULL;
971            mInput = null;
972            bufferType = BufferType.SPANNABLE;
973            // Required to request focus while in touch mode.
974            setFocusableInTouchMode(true);
975            // So that selection can be changed using arrow keys and touch is handled.
976            setMovementMethod(ArrowKeyMovementMethod.getInstance());
977        } else if (editable) {
978            mInput = TextKeyListener.getInstance();
979            mInputType = EditorInfo.TYPE_CLASS_TEXT;
980        } else {
981            mInput = null;
982
983            switch (buffertype) {
984                case 0:
985                    bufferType = BufferType.NORMAL;
986                    break;
987                case 1:
988                    bufferType = BufferType.SPANNABLE;
989                    break;
990                case 2:
991                    bufferType = BufferType.EDITABLE;
992                    break;
993            }
994        }
995
996        // mInputType has been set from inputType, possibly modified by mInputMethod.
997        // Specialize mInputType to [web]password if we have a text class and the original input
998        // type was a password.
999        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
1000            if (password || passwordInputType) {
1001                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1002                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
1003            }
1004            if (webPasswordInputType) {
1005                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1006                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
1007            }
1008        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1009            if (numberPasswordInputType) {
1010                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1011                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1012            }
1013        }
1014
1015        if (selectallonfocus) {
1016            mSelectAllOnFocus = true;
1017
1018            if (bufferType == BufferType.NORMAL)
1019                bufferType = BufferType.SPANNABLE;
1020        }
1021
1022        setCompoundDrawablesWithIntrinsicBounds(
1023            drawableLeft, drawableTop, drawableRight, drawableBottom);
1024        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1025        setCompoundDrawablePadding(drawablePadding);
1026
1027        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1028        // of lines of height are unchanged for multi-line TextViews.
1029        setInputTypeSingleLine(singleLine);
1030        applySingleLine(singleLine, singleLine, singleLine);
1031
1032        if (singleLine && mInput == null && ellipsize < 0) {
1033                ellipsize = 3; // END
1034        }
1035
1036        switch (ellipsize) {
1037            case 1:
1038                setEllipsize(TextUtils.TruncateAt.START);
1039                break;
1040            case 2:
1041                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1042                break;
1043            case 3:
1044                setEllipsize(TextUtils.TruncateAt.END);
1045                break;
1046            case 4:
1047                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1048                    setHorizontalFadingEdgeEnabled(true);
1049                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1050                } else {
1051                    setHorizontalFadingEdgeEnabled(false);
1052                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1053                }
1054                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1055                break;
1056        }
1057
1058        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1059        setHintTextColor(textColorHint);
1060        setLinkTextColor(textColorLink);
1061        if (textColorHighlight != 0) {
1062            setHighlightColor(textColorHighlight);
1063        }
1064        setRawTextSize(textSize);
1065
1066        if (allCaps) {
1067            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1068        }
1069
1070        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1071            setTransformationMethod(PasswordTransformationMethod.getInstance());
1072            typefaceIndex = MONOSPACE;
1073        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1074                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1075            typefaceIndex = MONOSPACE;
1076        }
1077
1078        setTypefaceByIndex(typefaceIndex, styleIndex);
1079
1080        if (shadowcolor != 0) {
1081            setShadowLayer(r, dx, dy, shadowcolor);
1082        }
1083
1084        if (maxlength >= 0) {
1085            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1086        } else {
1087            setFilters(NO_FILTERS);
1088        }
1089
1090        setText(text, bufferType);
1091        if (hint != null) setHint(hint);
1092
1093        /*
1094         * Views are not normally focusable unless specified to be.
1095         * However, TextViews that have input or movement methods *are*
1096         * focusable by default.
1097         */
1098        a = context.obtainStyledAttributes(attrs,
1099                                           com.android.internal.R.styleable.View,
1100                                           defStyle, 0);
1101
1102        boolean focusable = mMovement != null || mInput != null;
1103        boolean clickable = focusable;
1104        boolean longClickable = focusable;
1105
1106        n = a.getIndexCount();
1107        for (int i = 0; i < n; i++) {
1108            int attr = a.getIndex(i);
1109
1110            switch (attr) {
1111            case com.android.internal.R.styleable.View_focusable:
1112                focusable = a.getBoolean(attr, focusable);
1113                break;
1114
1115            case com.android.internal.R.styleable.View_clickable:
1116                clickable = a.getBoolean(attr, clickable);
1117                break;
1118
1119            case com.android.internal.R.styleable.View_longClickable:
1120                longClickable = a.getBoolean(attr, longClickable);
1121                break;
1122            }
1123        }
1124        a.recycle();
1125
1126        setFocusable(focusable);
1127        setClickable(clickable);
1128        setLongClickable(longClickable);
1129
1130        prepareCursorControllers();
1131
1132        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1133        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1134        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1135    }
1136
1137    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1138        Typeface tf = null;
1139        switch (typefaceIndex) {
1140            case SANS:
1141                tf = Typeface.SANS_SERIF;
1142                break;
1143
1144            case SERIF:
1145                tf = Typeface.SERIF;
1146                break;
1147
1148            case MONOSPACE:
1149                tf = Typeface.MONOSPACE;
1150                break;
1151        }
1152
1153        setTypeface(tf, styleIndex);
1154    }
1155
1156    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1157        boolean hasRelativeDrawables = (start != null) || (end != null);
1158        if (hasRelativeDrawables) {
1159            Drawables dr = mDrawables;
1160            if (dr == null) {
1161                mDrawables = dr = new Drawables();
1162            }
1163            final Rect compoundRect = dr.mCompoundRect;
1164            int[] state = getDrawableState();
1165            if (start != null) {
1166                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1167                start.setState(state);
1168                start.copyBounds(compoundRect);
1169                start.setCallback(this);
1170
1171                dr.mDrawableStart = start;
1172                dr.mDrawableSizeStart = compoundRect.width();
1173                dr.mDrawableHeightStart = compoundRect.height();
1174            } else {
1175                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1176            }
1177            if (end != null) {
1178                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1179                end.setState(state);
1180                end.copyBounds(compoundRect);
1181                end.setCallback(this);
1182
1183                dr.mDrawableEnd = end;
1184                dr.mDrawableSizeEnd = compoundRect.width();
1185                dr.mDrawableHeightEnd = compoundRect.height();
1186            } else {
1187                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1188            }
1189        }
1190    }
1191
1192    @Override
1193    public void setEnabled(boolean enabled) {
1194        if (enabled == isEnabled()) {
1195            return;
1196        }
1197
1198        if (!enabled) {
1199            // Hide the soft input if the currently active TextView is disabled
1200            InputMethodManager imm = InputMethodManager.peekInstance();
1201            if (imm != null && imm.isActive(this)) {
1202                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1203            }
1204        }
1205        super.setEnabled(enabled);
1206        prepareCursorControllers();
1207        if (enabled) {
1208            // Make sure IME is updated with current editor info.
1209            InputMethodManager imm = InputMethodManager.peekInstance();
1210            if (imm != null) imm.restartInput(this);
1211        }
1212
1213        // start or stop the cursor blinking as appropriate
1214        makeBlink();
1215    }
1216
1217    /**
1218     * Sets the typeface and style in which the text should be displayed,
1219     * and turns on the fake bold and italic bits in the Paint if the
1220     * Typeface that you provided does not have all the bits in the
1221     * style that you specified.
1222     *
1223     * @attr ref android.R.styleable#TextView_typeface
1224     * @attr ref android.R.styleable#TextView_textStyle
1225     */
1226    public void setTypeface(Typeface tf, int style) {
1227        if (style > 0) {
1228            if (tf == null) {
1229                tf = Typeface.defaultFromStyle(style);
1230            } else {
1231                tf = Typeface.create(tf, style);
1232            }
1233
1234            setTypeface(tf);
1235            // now compute what (if any) algorithmic styling is needed
1236            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1237            int need = style & ~typefaceStyle;
1238            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1239            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1240        } else {
1241            mTextPaint.setFakeBoldText(false);
1242            mTextPaint.setTextSkewX(0);
1243            setTypeface(tf);
1244        }
1245    }
1246
1247    /**
1248     * Subclasses override this to specify that they have a KeyListener
1249     * by default even if not specifically called for in the XML options.
1250     */
1251    protected boolean getDefaultEditable() {
1252        return false;
1253    }
1254
1255    /**
1256     * Subclasses override this to specify a default movement method.
1257     */
1258    protected MovementMethod getDefaultMovementMethod() {
1259        return null;
1260    }
1261
1262    /**
1263     * Return the text the TextView is displaying. If setText() was called with
1264     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1265     * the return value from this method to Spannable or Editable, respectively.
1266     *
1267     * Note: The content of the return value should not be modified. If you want
1268     * a modifiable one, you should make your own copy first.
1269     */
1270    @ViewDebug.CapturedViewProperty
1271    public CharSequence getText() {
1272        return mText;
1273    }
1274
1275    /**
1276     * Returns the length, in characters, of the text managed by this TextView
1277     */
1278    public int length() {
1279        return mText.length();
1280    }
1281
1282    /**
1283     * Return the text the TextView is displaying as an Editable object.  If
1284     * the text is not editable, null is returned.
1285     *
1286     * @see #getText
1287     */
1288    public Editable getEditableText() {
1289        return (mText instanceof Editable) ? (Editable)mText : null;
1290    }
1291
1292    /**
1293     * @return the height of one standard line in pixels.  Note that markup
1294     * within the text can cause individual lines to be taller or shorter
1295     * than this height, and the layout may contain additional first-
1296     * or last-line padding.
1297     */
1298    public int getLineHeight() {
1299        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1300    }
1301
1302    /**
1303     * @return the Layout that is currently being used to display the text.
1304     * This can be null if the text or width has recently changes.
1305     */
1306    public final Layout getLayout() {
1307        return mLayout;
1308    }
1309
1310    /**
1311     * @return the current key listener for this TextView.
1312     * This will frequently be null for non-EditText TextViews.
1313     */
1314    public final KeyListener getKeyListener() {
1315        return mInput;
1316    }
1317
1318    /**
1319     * Sets the key listener to be used with this TextView.  This can be null
1320     * to disallow user input.  Note that this method has significant and
1321     * subtle interactions with soft keyboards and other input method:
1322     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1323     * for important details.  Calling this method will replace the current
1324     * content type of the text view with the content type returned by the
1325     * key listener.
1326     * <p>
1327     * Be warned that if you want a TextView with a key listener or movement
1328     * method not to be focusable, or if you want a TextView without a
1329     * key listener or movement method to be focusable, you must call
1330     * {@link #setFocusable} again after calling this to get the focusability
1331     * back the way you want it.
1332     *
1333     * @attr ref android.R.styleable#TextView_numeric
1334     * @attr ref android.R.styleable#TextView_digits
1335     * @attr ref android.R.styleable#TextView_phoneNumber
1336     * @attr ref android.R.styleable#TextView_inputMethod
1337     * @attr ref android.R.styleable#TextView_capitalize
1338     * @attr ref android.R.styleable#TextView_autoText
1339     */
1340    public void setKeyListener(KeyListener input) {
1341        setKeyListenerOnly(input);
1342        fixFocusableAndClickableSettings();
1343
1344        if (input != null) {
1345            try {
1346                mInputType = mInput.getInputType();
1347            } catch (IncompatibleClassChangeError e) {
1348                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1349            }
1350            // Change inputType, without affecting transformation.
1351            // No need to applySingleLine since mSingleLine is unchanged.
1352            setInputTypeSingleLine(mSingleLine);
1353        } else {
1354            mInputType = EditorInfo.TYPE_NULL;
1355        }
1356
1357        InputMethodManager imm = InputMethodManager.peekInstance();
1358        if (imm != null) imm.restartInput(this);
1359    }
1360
1361    private void setKeyListenerOnly(KeyListener input) {
1362        mInput = input;
1363        if (mInput != null && !(mText instanceof Editable))
1364            setText(mText);
1365
1366        setFilters((Editable) mText, mFilters);
1367    }
1368
1369    /**
1370     * @return the movement method being used for this TextView.
1371     * This will frequently be null for non-EditText TextViews.
1372     */
1373    public final MovementMethod getMovementMethod() {
1374        return mMovement;
1375    }
1376
1377    /**
1378     * Sets the movement method (arrow key handler) to be used for
1379     * this TextView.  This can be null to disallow using the arrow keys
1380     * to move the cursor or scroll the view.
1381     * <p>
1382     * Be warned that if you want a TextView with a key listener or movement
1383     * method not to be focusable, or if you want a TextView without a
1384     * key listener or movement method to be focusable, you must call
1385     * {@link #setFocusable} again after calling this to get the focusability
1386     * back the way you want it.
1387     */
1388    public final void setMovementMethod(MovementMethod movement) {
1389        mMovement = movement;
1390
1391        if (mMovement != null && !(mText instanceof Spannable))
1392            setText(mText);
1393
1394        fixFocusableAndClickableSettings();
1395
1396        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1397        prepareCursorControllers();
1398    }
1399
1400    private void fixFocusableAndClickableSettings() {
1401        if ((mMovement != null) || mInput != null) {
1402            setFocusable(true);
1403            setClickable(true);
1404            setLongClickable(true);
1405        } else {
1406            setFocusable(false);
1407            setClickable(false);
1408            setLongClickable(false);
1409        }
1410    }
1411
1412    /**
1413     * @return the current transformation method for this TextView.
1414     * This will frequently be null except for single-line and password
1415     * fields.
1416     */
1417    public final TransformationMethod getTransformationMethod() {
1418        return mTransformation;
1419    }
1420
1421    /**
1422     * Sets the transformation that is applied to the text that this
1423     * TextView is displaying.
1424     *
1425     * @attr ref android.R.styleable#TextView_password
1426     * @attr ref android.R.styleable#TextView_singleLine
1427     */
1428    public final void setTransformationMethod(TransformationMethod method) {
1429        if (method == mTransformation) {
1430            // Avoid the setText() below if the transformation is
1431            // the same.
1432            return;
1433        }
1434        if (mTransformation != null) {
1435            if (mText instanceof Spannable) {
1436                ((Spannable) mText).removeSpan(mTransformation);
1437            }
1438        }
1439
1440        mTransformation = method;
1441
1442        if (method instanceof TransformationMethod2) {
1443            TransformationMethod2 method2 = (TransformationMethod2) method;
1444            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1445            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1446        } else {
1447            mAllowTransformationLengthChange = false;
1448        }
1449
1450        setText(mText);
1451    }
1452
1453    /**
1454     * Returns the top padding of the view, plus space for the top
1455     * Drawable if any.
1456     */
1457    public int getCompoundPaddingTop() {
1458        final Drawables dr = mDrawables;
1459        if (dr == null || dr.mDrawableTop == null) {
1460            return mPaddingTop;
1461        } else {
1462            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1463        }
1464    }
1465
1466    /**
1467     * Returns the bottom padding of the view, plus space for the bottom
1468     * Drawable if any.
1469     */
1470    public int getCompoundPaddingBottom() {
1471        final Drawables dr = mDrawables;
1472        if (dr == null || dr.mDrawableBottom == null) {
1473            return mPaddingBottom;
1474        } else {
1475            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1476        }
1477    }
1478
1479    /**
1480     * Returns the left padding of the view, plus space for the left
1481     * Drawable if any.
1482     */
1483    public int getCompoundPaddingLeft() {
1484        final Drawables dr = mDrawables;
1485        if (dr == null || dr.mDrawableLeft == null) {
1486            return mPaddingLeft;
1487        } else {
1488            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1489        }
1490    }
1491
1492    /**
1493     * Returns the right padding of the view, plus space for the right
1494     * Drawable if any.
1495     */
1496    public int getCompoundPaddingRight() {
1497        final Drawables dr = mDrawables;
1498        if (dr == null || dr.mDrawableRight == null) {
1499            return mPaddingRight;
1500        } else {
1501            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1502        }
1503    }
1504
1505    /**
1506     * Returns the start padding of the view, plus space for the start
1507     * Drawable if any.
1508     *
1509     * @hide
1510     */
1511    public int getCompoundPaddingStart() {
1512        resolveDrawables();
1513        switch(getResolvedLayoutDirection()) {
1514            default:
1515            case LAYOUT_DIRECTION_LTR:
1516                return getCompoundPaddingLeft();
1517            case LAYOUT_DIRECTION_RTL:
1518                return getCompoundPaddingRight();
1519        }
1520    }
1521
1522    /**
1523     * Returns the end padding of the view, plus space for the end
1524     * Drawable if any.
1525     *
1526     * @hide
1527     */
1528    public int getCompoundPaddingEnd() {
1529        resolveDrawables();
1530        switch(getResolvedLayoutDirection()) {
1531            default:
1532            case LAYOUT_DIRECTION_LTR:
1533                return getCompoundPaddingRight();
1534            case LAYOUT_DIRECTION_RTL:
1535                return getCompoundPaddingLeft();
1536        }
1537    }
1538
1539    /**
1540     * Returns the extended top padding of the view, including both the
1541     * top Drawable if any and any extra space to keep more than maxLines
1542     * of text from showing.  It is only valid to call this after measuring.
1543     */
1544    public int getExtendedPaddingTop() {
1545        if (mMaxMode != LINES) {
1546            return getCompoundPaddingTop();
1547        }
1548
1549        if (mLayout.getLineCount() <= mMaximum) {
1550            return getCompoundPaddingTop();
1551        }
1552
1553        int top = getCompoundPaddingTop();
1554        int bottom = getCompoundPaddingBottom();
1555        int viewht = getHeight() - top - bottom;
1556        int layoutht = mLayout.getLineTop(mMaximum);
1557
1558        if (layoutht >= viewht) {
1559            return top;
1560        }
1561
1562        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1563        if (gravity == Gravity.TOP) {
1564            return top;
1565        } else if (gravity == Gravity.BOTTOM) {
1566            return top + viewht - layoutht;
1567        } else { // (gravity == Gravity.CENTER_VERTICAL)
1568            return top + (viewht - layoutht) / 2;
1569        }
1570    }
1571
1572    /**
1573     * Returns the extended bottom padding of the view, including both the
1574     * bottom Drawable if any and any extra space to keep more than maxLines
1575     * of text from showing.  It is only valid to call this after measuring.
1576     */
1577    public int getExtendedPaddingBottom() {
1578        if (mMaxMode != LINES) {
1579            return getCompoundPaddingBottom();
1580        }
1581
1582        if (mLayout.getLineCount() <= mMaximum) {
1583            return getCompoundPaddingBottom();
1584        }
1585
1586        int top = getCompoundPaddingTop();
1587        int bottom = getCompoundPaddingBottom();
1588        int viewht = getHeight() - top - bottom;
1589        int layoutht = mLayout.getLineTop(mMaximum);
1590
1591        if (layoutht >= viewht) {
1592            return bottom;
1593        }
1594
1595        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1596        if (gravity == Gravity.TOP) {
1597            return bottom + viewht - layoutht;
1598        } else if (gravity == Gravity.BOTTOM) {
1599            return bottom;
1600        } else { // (gravity == Gravity.CENTER_VERTICAL)
1601            return bottom + (viewht - layoutht) / 2;
1602        }
1603    }
1604
1605    /**
1606     * Returns the total left padding of the view, including the left
1607     * Drawable if any.
1608     */
1609    public int getTotalPaddingLeft() {
1610        return getCompoundPaddingLeft();
1611    }
1612
1613    /**
1614     * Returns the total right padding of the view, including the right
1615     * Drawable if any.
1616     */
1617    public int getTotalPaddingRight() {
1618        return getCompoundPaddingRight();
1619    }
1620
1621    /**
1622     * Returns the total start padding of the view, including the start
1623     * Drawable if any.
1624     *
1625     * @hide
1626     */
1627    public int getTotalPaddingStart() {
1628        return getCompoundPaddingStart();
1629    }
1630
1631    /**
1632     * Returns the total end padding of the view, including the end
1633     * Drawable if any.
1634     *
1635     * @hide
1636     */
1637    public int getTotalPaddingEnd() {
1638        return getCompoundPaddingEnd();
1639    }
1640
1641    /**
1642     * Returns the total top padding of the view, including the top
1643     * Drawable if any, the extra space to keep more than maxLines
1644     * from showing, and the vertical offset for gravity, if any.
1645     */
1646    public int getTotalPaddingTop() {
1647        return getExtendedPaddingTop() + getVerticalOffset(true);
1648    }
1649
1650    /**
1651     * Returns the total bottom padding of the view, including the bottom
1652     * Drawable if any, the extra space to keep more than maxLines
1653     * from showing, and the vertical offset for gravity, if any.
1654     */
1655    public int getTotalPaddingBottom() {
1656        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1657    }
1658
1659    /**
1660     * Sets the Drawables (if any) to appear to the left of, above,
1661     * to the right of, and below the text.  Use null if you do not
1662     * want a Drawable there.  The Drawables must already have had
1663     * {@link Drawable#setBounds} called.
1664     *
1665     * @attr ref android.R.styleable#TextView_drawableLeft
1666     * @attr ref android.R.styleable#TextView_drawableTop
1667     * @attr ref android.R.styleable#TextView_drawableRight
1668     * @attr ref android.R.styleable#TextView_drawableBottom
1669     */
1670    public void setCompoundDrawables(Drawable left, Drawable top,
1671                                     Drawable right, Drawable bottom) {
1672        Drawables dr = mDrawables;
1673
1674        final boolean drawables = left != null || top != null
1675                || right != null || bottom != null;
1676
1677        if (!drawables) {
1678            // Clearing drawables...  can we free the data structure?
1679            if (dr != null) {
1680                if (dr.mDrawablePadding == 0) {
1681                    mDrawables = null;
1682                } else {
1683                    // We need to retain the last set padding, so just clear
1684                    // out all of the fields in the existing structure.
1685                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1686                    dr.mDrawableLeft = null;
1687                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1688                    dr.mDrawableTop = null;
1689                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1690                    dr.mDrawableRight = null;
1691                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1692                    dr.mDrawableBottom = null;
1693                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1694                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1695                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1696                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1697                }
1698            }
1699        } else {
1700            if (dr == null) {
1701                mDrawables = dr = new Drawables();
1702            }
1703
1704            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1705                dr.mDrawableLeft.setCallback(null);
1706            }
1707            dr.mDrawableLeft = left;
1708
1709            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1710                dr.mDrawableTop.setCallback(null);
1711            }
1712            dr.mDrawableTop = top;
1713
1714            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1715                dr.mDrawableRight.setCallback(null);
1716            }
1717            dr.mDrawableRight = right;
1718
1719            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1720                dr.mDrawableBottom.setCallback(null);
1721            }
1722            dr.mDrawableBottom = bottom;
1723
1724            final Rect compoundRect = dr.mCompoundRect;
1725            int[] state;
1726
1727            state = getDrawableState();
1728
1729            if (left != null) {
1730                left.setState(state);
1731                left.copyBounds(compoundRect);
1732                left.setCallback(this);
1733                dr.mDrawableSizeLeft = compoundRect.width();
1734                dr.mDrawableHeightLeft = compoundRect.height();
1735            } else {
1736                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1737            }
1738
1739            if (right != null) {
1740                right.setState(state);
1741                right.copyBounds(compoundRect);
1742                right.setCallback(this);
1743                dr.mDrawableSizeRight = compoundRect.width();
1744                dr.mDrawableHeightRight = compoundRect.height();
1745            } else {
1746                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1747            }
1748
1749            if (top != null) {
1750                top.setState(state);
1751                top.copyBounds(compoundRect);
1752                top.setCallback(this);
1753                dr.mDrawableSizeTop = compoundRect.height();
1754                dr.mDrawableWidthTop = compoundRect.width();
1755            } else {
1756                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1757            }
1758
1759            if (bottom != null) {
1760                bottom.setState(state);
1761                bottom.copyBounds(compoundRect);
1762                bottom.setCallback(this);
1763                dr.mDrawableSizeBottom = compoundRect.height();
1764                dr.mDrawableWidthBottom = compoundRect.width();
1765            } else {
1766                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1767            }
1768        }
1769
1770        invalidate();
1771        requestLayout();
1772    }
1773
1774    /**
1775     * Sets the Drawables (if any) to appear to the left of, above,
1776     * to the right of, and below the text.  Use 0 if you do not
1777     * want a Drawable there. The Drawables' bounds will be set to
1778     * their intrinsic bounds.
1779     *
1780     * @param left Resource identifier of the left Drawable.
1781     * @param top Resource identifier of the top Drawable.
1782     * @param right Resource identifier of the right Drawable.
1783     * @param bottom Resource identifier of the bottom Drawable.
1784     *
1785     * @attr ref android.R.styleable#TextView_drawableLeft
1786     * @attr ref android.R.styleable#TextView_drawableTop
1787     * @attr ref android.R.styleable#TextView_drawableRight
1788     * @attr ref android.R.styleable#TextView_drawableBottom
1789     */
1790    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1791        final Resources resources = getContext().getResources();
1792        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1793                top != 0 ? resources.getDrawable(top) : null,
1794                right != 0 ? resources.getDrawable(right) : null,
1795                bottom != 0 ? resources.getDrawable(bottom) : null);
1796    }
1797
1798    /**
1799     * Sets the Drawables (if any) to appear to the left of, above,
1800     * to the right of, and below the text.  Use null if you do not
1801     * want a Drawable there. The Drawables' bounds will be set to
1802     * their intrinsic bounds.
1803     *
1804     * @attr ref android.R.styleable#TextView_drawableLeft
1805     * @attr ref android.R.styleable#TextView_drawableTop
1806     * @attr ref android.R.styleable#TextView_drawableRight
1807     * @attr ref android.R.styleable#TextView_drawableBottom
1808     */
1809    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1810            Drawable right, Drawable bottom) {
1811
1812        if (left != null) {
1813            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1814        }
1815        if (right != null) {
1816            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1817        }
1818        if (top != null) {
1819            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1820        }
1821        if (bottom != null) {
1822            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1823        }
1824        setCompoundDrawables(left, top, right, bottom);
1825    }
1826
1827    /**
1828     * Sets the Drawables (if any) to appear to the start of, above,
1829     * to the end of, and below the text.  Use null if you do not
1830     * want a Drawable there.  The Drawables must already have had
1831     * {@link Drawable#setBounds} called.
1832     *
1833     * @attr ref android.R.styleable#TextView_drawableStart
1834     * @attr ref android.R.styleable#TextView_drawableTop
1835     * @attr ref android.R.styleable#TextView_drawableEnd
1836     * @attr ref android.R.styleable#TextView_drawableBottom
1837     *
1838     * @hide
1839     */
1840    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1841                                     Drawable end, Drawable bottom) {
1842        Drawables dr = mDrawables;
1843
1844        final boolean drawables = start != null || top != null
1845                || end != null || bottom != null;
1846
1847        if (!drawables) {
1848            // Clearing drawables...  can we free the data structure?
1849            if (dr != null) {
1850                if (dr.mDrawablePadding == 0) {
1851                    mDrawables = null;
1852                } else {
1853                    // We need to retain the last set padding, so just clear
1854                    // out all of the fields in the existing structure.
1855                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1856                    dr.mDrawableStart = null;
1857                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1858                    dr.mDrawableTop = null;
1859                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1860                    dr.mDrawableEnd = null;
1861                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1862                    dr.mDrawableBottom = null;
1863                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1864                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1865                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1866                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1867                }
1868            }
1869        } else {
1870            if (dr == null) {
1871                mDrawables = dr = new Drawables();
1872            }
1873
1874            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1875                dr.mDrawableStart.setCallback(null);
1876            }
1877            dr.mDrawableStart = start;
1878
1879            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1880                dr.mDrawableTop.setCallback(null);
1881            }
1882            dr.mDrawableTop = top;
1883
1884            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1885                dr.mDrawableEnd.setCallback(null);
1886            }
1887            dr.mDrawableEnd = end;
1888
1889            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1890                dr.mDrawableBottom.setCallback(null);
1891            }
1892            dr.mDrawableBottom = bottom;
1893
1894            final Rect compoundRect = dr.mCompoundRect;
1895            int[] state;
1896
1897            state = getDrawableState();
1898
1899            if (start != null) {
1900                start.setState(state);
1901                start.copyBounds(compoundRect);
1902                start.setCallback(this);
1903                dr.mDrawableSizeStart = compoundRect.width();
1904                dr.mDrawableHeightStart = compoundRect.height();
1905            } else {
1906                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1907            }
1908
1909            if (end != null) {
1910                end.setState(state);
1911                end.copyBounds(compoundRect);
1912                end.setCallback(this);
1913                dr.mDrawableSizeEnd = compoundRect.width();
1914                dr.mDrawableHeightEnd = compoundRect.height();
1915            } else {
1916                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1917            }
1918
1919            if (top != null) {
1920                top.setState(state);
1921                top.copyBounds(compoundRect);
1922                top.setCallback(this);
1923                dr.mDrawableSizeTop = compoundRect.height();
1924                dr.mDrawableWidthTop = compoundRect.width();
1925            } else {
1926                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1927            }
1928
1929            if (bottom != null) {
1930                bottom.setState(state);
1931                bottom.copyBounds(compoundRect);
1932                bottom.setCallback(this);
1933                dr.mDrawableSizeBottom = compoundRect.height();
1934                dr.mDrawableWidthBottom = compoundRect.width();
1935            } else {
1936                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1937            }
1938        }
1939
1940        resolveDrawables();
1941        invalidate();
1942        requestLayout();
1943    }
1944
1945    /**
1946     * Sets the Drawables (if any) to appear to the start of, above,
1947     * to the end of, and below the text.  Use 0 if you do not
1948     * want a Drawable there. The Drawables' bounds will be set to
1949     * their intrinsic bounds.
1950     *
1951     * @param start Resource identifier of the start Drawable.
1952     * @param top Resource identifier of the top Drawable.
1953     * @param end Resource identifier of the end Drawable.
1954     * @param bottom Resource identifier of the bottom Drawable.
1955     *
1956     * @attr ref android.R.styleable#TextView_drawableStart
1957     * @attr ref android.R.styleable#TextView_drawableTop
1958     * @attr ref android.R.styleable#TextView_drawableEnd
1959     * @attr ref android.R.styleable#TextView_drawableBottom
1960     *
1961     * @hide
1962     */
1963    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1964            int bottom) {
1965        resetResolvedDrawables();
1966        final Resources resources = getContext().getResources();
1967        setCompoundDrawablesRelativeWithIntrinsicBounds(
1968                start != 0 ? resources.getDrawable(start) : null,
1969                top != 0 ? resources.getDrawable(top) : null,
1970                end != 0 ? resources.getDrawable(end) : null,
1971                bottom != 0 ? resources.getDrawable(bottom) : null);
1972    }
1973
1974    /**
1975     * Sets the Drawables (if any) to appear to the start of, above,
1976     * to the end of, and below the text.  Use null if you do not
1977     * want a Drawable there. The Drawables' bounds will be set to
1978     * their intrinsic bounds.
1979     *
1980     * @attr ref android.R.styleable#TextView_drawableStart
1981     * @attr ref android.R.styleable#TextView_drawableTop
1982     * @attr ref android.R.styleable#TextView_drawableEnd
1983     * @attr ref android.R.styleable#TextView_drawableBottom
1984     *
1985     * @hide
1986     */
1987    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1988            Drawable end, Drawable bottom) {
1989
1990        resetResolvedDrawables();
1991        if (start != null) {
1992            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1993        }
1994        if (end != null) {
1995            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1996        }
1997        if (top != null) {
1998            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1999        }
2000        if (bottom != null) {
2001            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2002        }
2003        setCompoundDrawablesRelative(start, top, end, bottom);
2004    }
2005
2006    /**
2007     * Returns drawables for the left, top, right, and bottom borders.
2008     */
2009    public Drawable[] getCompoundDrawables() {
2010        final Drawables dr = mDrawables;
2011        if (dr != null) {
2012            return new Drawable[] {
2013                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2014            };
2015        } else {
2016            return new Drawable[] { null, null, null, null };
2017        }
2018    }
2019
2020    /**
2021     * Returns drawables for the start, top, end, and bottom borders.
2022     *
2023     * @hide
2024     */
2025    public Drawable[] getCompoundDrawablesRelative() {
2026        final Drawables dr = mDrawables;
2027        if (dr != null) {
2028            return new Drawable[] {
2029                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2030            };
2031        } else {
2032            return new Drawable[] { null, null, null, null };
2033        }
2034    }
2035
2036    /**
2037     * Sets the size of the padding between the compound drawables and
2038     * the text.
2039     *
2040     * @attr ref android.R.styleable#TextView_drawablePadding
2041     */
2042    public void setCompoundDrawablePadding(int pad) {
2043        Drawables dr = mDrawables;
2044        if (pad == 0) {
2045            if (dr != null) {
2046                dr.mDrawablePadding = pad;
2047            }
2048        } else {
2049            if (dr == null) {
2050                mDrawables = dr = new Drawables();
2051            }
2052            dr.mDrawablePadding = pad;
2053        }
2054
2055        invalidate();
2056        requestLayout();
2057    }
2058
2059    /**
2060     * Returns the padding between the compound drawables and the text.
2061     */
2062    public int getCompoundDrawablePadding() {
2063        final Drawables dr = mDrawables;
2064        return dr != null ? dr.mDrawablePadding : 0;
2065    }
2066
2067    @Override
2068    public void setPadding(int left, int top, int right, int bottom) {
2069        if (left != mPaddingLeft ||
2070            right != mPaddingRight ||
2071            top != mPaddingTop ||
2072            bottom != mPaddingBottom) {
2073            nullLayouts();
2074        }
2075
2076        // the super call will requestLayout()
2077        super.setPadding(left, top, right, bottom);
2078        invalidate();
2079    }
2080
2081    /**
2082     * Gets the autolink mask of the text.  See {@link
2083     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2084     * possible values.
2085     *
2086     * @attr ref android.R.styleable#TextView_autoLink
2087     */
2088    public final int getAutoLinkMask() {
2089        return mAutoLinkMask;
2090    }
2091
2092    /**
2093     * Sets the text color, size, style, hint color, and highlight color
2094     * from the specified TextAppearance resource.
2095     */
2096    public void setTextAppearance(Context context, int resid) {
2097        TypedArray appearance =
2098            context.obtainStyledAttributes(resid,
2099                                           com.android.internal.R.styleable.TextAppearance);
2100
2101        int color;
2102        ColorStateList colors;
2103        int ts;
2104
2105        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2106        if (color != 0) {
2107            setHighlightColor(color);
2108        }
2109
2110        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2111                                              TextAppearance_textColor);
2112        if (colors != null) {
2113            setTextColor(colors);
2114        }
2115
2116        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2117                                              TextAppearance_textSize, 0);
2118        if (ts != 0) {
2119            setRawTextSize(ts);
2120        }
2121
2122        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2123                                              TextAppearance_textColorHint);
2124        if (colors != null) {
2125            setHintTextColor(colors);
2126        }
2127
2128        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2129                                              TextAppearance_textColorLink);
2130        if (colors != null) {
2131            setLinkTextColor(colors);
2132        }
2133
2134        int typefaceIndex, styleIndex;
2135
2136        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2137                                          TextAppearance_typeface, -1);
2138        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2139                                       TextAppearance_textStyle, -1);
2140
2141        setTypefaceByIndex(typefaceIndex, styleIndex);
2142
2143        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2144                false)) {
2145            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2146        }
2147
2148        appearance.recycle();
2149    }
2150
2151    /**
2152     * @return the size (in pixels) of the default text size in this TextView.
2153     */
2154    public float getTextSize() {
2155        return mTextPaint.getTextSize();
2156    }
2157
2158    /**
2159     * Set the default text size to the given value, interpreted as "scaled
2160     * pixel" units.  This size is adjusted based on the current density and
2161     * user font size preference.
2162     *
2163     * @param size The scaled pixel size.
2164     *
2165     * @attr ref android.R.styleable#TextView_textSize
2166     */
2167    @android.view.RemotableViewMethod
2168    public void setTextSize(float size) {
2169        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2170    }
2171
2172    /**
2173     * Set the default text size to a given unit and value.  See {@link
2174     * TypedValue} for the possible dimension units.
2175     *
2176     * @param unit The desired dimension unit.
2177     * @param size The desired size in the given units.
2178     *
2179     * @attr ref android.R.styleable#TextView_textSize
2180     */
2181    public void setTextSize(int unit, float size) {
2182        Context c = getContext();
2183        Resources r;
2184
2185        if (c == null)
2186            r = Resources.getSystem();
2187        else
2188            r = c.getResources();
2189
2190        setRawTextSize(TypedValue.applyDimension(
2191            unit, size, r.getDisplayMetrics()));
2192    }
2193
2194    private void setRawTextSize(float size) {
2195        if (size != mTextPaint.getTextSize()) {
2196            mTextPaint.setTextSize(size);
2197
2198            if (mLayout != null) {
2199                nullLayouts();
2200                requestLayout();
2201                invalidate();
2202            }
2203        }
2204    }
2205
2206    /**
2207     * @return the extent by which text is currently being stretched
2208     * horizontally.  This will usually be 1.
2209     */
2210    public float getTextScaleX() {
2211        return mTextPaint.getTextScaleX();
2212    }
2213
2214    /**
2215     * Sets the extent by which text should be stretched horizontally.
2216     *
2217     * @attr ref android.R.styleable#TextView_textScaleX
2218     */
2219    @android.view.RemotableViewMethod
2220    public void setTextScaleX(float size) {
2221        if (size != mTextPaint.getTextScaleX()) {
2222            mUserSetTextScaleX = true;
2223            mTextPaint.setTextScaleX(size);
2224
2225            if (mLayout != null) {
2226                nullLayouts();
2227                requestLayout();
2228                invalidate();
2229            }
2230        }
2231    }
2232
2233    /**
2234     * Sets the typeface and style in which the text should be displayed.
2235     * Note that not all Typeface families actually have bold and italic
2236     * variants, so you may need to use
2237     * {@link #setTypeface(Typeface, int)} to get the appearance
2238     * that you actually want.
2239     *
2240     * @attr ref android.R.styleable#TextView_typeface
2241     * @attr ref android.R.styleable#TextView_textStyle
2242     */
2243    public void setTypeface(Typeface tf) {
2244        if (mTextPaint.getTypeface() != tf) {
2245            mTextPaint.setTypeface(tf);
2246
2247            if (mLayout != null) {
2248                nullLayouts();
2249                requestLayout();
2250                invalidate();
2251            }
2252        }
2253    }
2254
2255    /**
2256     * @return the current typeface and style in which the text is being
2257     * displayed.
2258     */
2259    public Typeface getTypeface() {
2260        return mTextPaint.getTypeface();
2261    }
2262
2263    /**
2264     * Sets the text color for all the states (normal, selected,
2265     * focused) to be this color.
2266     *
2267     * @attr ref android.R.styleable#TextView_textColor
2268     */
2269    @android.view.RemotableViewMethod
2270    public void setTextColor(int color) {
2271        mTextColor = ColorStateList.valueOf(color);
2272        updateTextColors();
2273    }
2274
2275    /**
2276     * Sets the text color.
2277     *
2278     * @attr ref android.R.styleable#TextView_textColor
2279     */
2280    public void setTextColor(ColorStateList colors) {
2281        if (colors == null) {
2282            throw new NullPointerException();
2283        }
2284
2285        mTextColor = colors;
2286        updateTextColors();
2287    }
2288
2289    /**
2290     * Return the set of text colors.
2291     *
2292     * @return Returns the set of text colors.
2293     */
2294    public final ColorStateList getTextColors() {
2295        return mTextColor;
2296    }
2297
2298    /**
2299     * <p>Return the current color selected for normal text.</p>
2300     *
2301     * @return Returns the current text color.
2302     */
2303    public final int getCurrentTextColor() {
2304        return mCurTextColor;
2305    }
2306
2307    /**
2308     * Sets the color used to display the selection highlight.
2309     *
2310     * @attr ref android.R.styleable#TextView_textColorHighlight
2311     */
2312    @android.view.RemotableViewMethod
2313    public void setHighlightColor(int color) {
2314        if (mHighlightColor != color) {
2315            mHighlightColor = color;
2316            invalidate();
2317        }
2318    }
2319
2320    /**
2321     * Gives the text a shadow of the specified radius and color, the specified
2322     * distance from its normal position.
2323     *
2324     * @attr ref android.R.styleable#TextView_shadowColor
2325     * @attr ref android.R.styleable#TextView_shadowDx
2326     * @attr ref android.R.styleable#TextView_shadowDy
2327     * @attr ref android.R.styleable#TextView_shadowRadius
2328     */
2329    public void setShadowLayer(float radius, float dx, float dy, int color) {
2330        mTextPaint.setShadowLayer(radius, dx, dy, color);
2331
2332        mShadowRadius = radius;
2333        mShadowDx = dx;
2334        mShadowDy = dy;
2335
2336        invalidate();
2337    }
2338
2339    /**
2340     * @return the base paint used for the text.  Please use this only to
2341     * consult the Paint's properties and not to change them.
2342     */
2343    public TextPaint getPaint() {
2344        return mTextPaint;
2345    }
2346
2347    /**
2348     * Sets the autolink mask of the text.  See {@link
2349     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2350     * possible values.
2351     *
2352     * @attr ref android.R.styleable#TextView_autoLink
2353     */
2354    @android.view.RemotableViewMethod
2355    public final void setAutoLinkMask(int mask) {
2356        mAutoLinkMask = mask;
2357    }
2358
2359    /**
2360     * Sets whether the movement method will automatically be set to
2361     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2362     * set to nonzero and links are detected in {@link #setText}.
2363     * The default is true.
2364     *
2365     * @attr ref android.R.styleable#TextView_linksClickable
2366     */
2367    @android.view.RemotableViewMethod
2368    public final void setLinksClickable(boolean whether) {
2369        mLinksClickable = whether;
2370    }
2371
2372    /**
2373     * Returns whether the movement method will automatically be set to
2374     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2375     * set to nonzero and links are detected in {@link #setText}.
2376     * The default is true.
2377     *
2378     * @attr ref android.R.styleable#TextView_linksClickable
2379     */
2380    public final boolean getLinksClickable() {
2381        return mLinksClickable;
2382    }
2383
2384    /**
2385     * Sets whether the soft input method will be made visible when this
2386     * TextView gets focused. The default is true.
2387     *
2388     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2389     * @hide
2390     */
2391    @android.view.RemotableViewMethod
2392    public final void setSoftInputShownOnFocus(boolean show) {
2393        mSoftInputShownOnFocus = show;
2394    }
2395
2396    /**
2397     * Returns whether the soft input method will be made visible when this
2398     * TextView gets focused. The default is true.
2399     *
2400     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2401     * @hide
2402     */
2403    public final boolean getSoftInputShownOnFocus() {
2404        return mSoftInputShownOnFocus;
2405    }
2406
2407    /**
2408     * Returns the list of URLSpans attached to the text
2409     * (by {@link Linkify} or otherwise) if any.  You can call
2410     * {@link URLSpan#getURL} on them to find where they link to
2411     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2412     * to find the region of the text they are attached to.
2413     */
2414    public URLSpan[] getUrls() {
2415        if (mText instanceof Spanned) {
2416            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2417        } else {
2418            return new URLSpan[0];
2419        }
2420    }
2421
2422    /**
2423     * Sets the color of the hint text.
2424     *
2425     * @attr ref android.R.styleable#TextView_textColorHint
2426     */
2427    @android.view.RemotableViewMethod
2428    public final void setHintTextColor(int color) {
2429        mHintTextColor = ColorStateList.valueOf(color);
2430        updateTextColors();
2431    }
2432
2433    /**
2434     * Sets the color of the hint text.
2435     *
2436     * @attr ref android.R.styleable#TextView_textColorHint
2437     */
2438    public final void setHintTextColor(ColorStateList colors) {
2439        mHintTextColor = colors;
2440        updateTextColors();
2441    }
2442
2443    /**
2444     * <p>Return the color used to paint the hint text.</p>
2445     *
2446     * @return Returns the list of hint text colors.
2447     */
2448    public final ColorStateList getHintTextColors() {
2449        return mHintTextColor;
2450    }
2451
2452    /**
2453     * <p>Return the current color selected to paint the hint text.</p>
2454     *
2455     * @return Returns the current hint text color.
2456     */
2457    public final int getCurrentHintTextColor() {
2458        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2459    }
2460
2461    /**
2462     * Sets the color of links in the text.
2463     *
2464     * @attr ref android.R.styleable#TextView_textColorLink
2465     */
2466    @android.view.RemotableViewMethod
2467    public final void setLinkTextColor(int color) {
2468        mLinkTextColor = ColorStateList.valueOf(color);
2469        updateTextColors();
2470    }
2471
2472    /**
2473     * Sets the color of links in the text.
2474     *
2475     * @attr ref android.R.styleable#TextView_textColorLink
2476     */
2477    public final void setLinkTextColor(ColorStateList colors) {
2478        mLinkTextColor = colors;
2479        updateTextColors();
2480    }
2481
2482    /**
2483     * <p>Returns the color used to paint links in the text.</p>
2484     *
2485     * @return Returns the list of link text colors.
2486     */
2487    public final ColorStateList getLinkTextColors() {
2488        return mLinkTextColor;
2489    }
2490
2491    /**
2492     * Sets the horizontal alignment of the text and the
2493     * vertical gravity that will be used when there is extra space
2494     * in the TextView beyond what is required for the text itself.
2495     *
2496     * @see android.view.Gravity
2497     * @attr ref android.R.styleable#TextView_gravity
2498     */
2499    public void setGravity(int gravity) {
2500        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2501            gravity |= Gravity.START;
2502        }
2503        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2504            gravity |= Gravity.TOP;
2505        }
2506
2507        boolean newLayout = false;
2508
2509        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2510            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2511            newLayout = true;
2512        }
2513
2514        if (gravity != mGravity) {
2515            invalidate();
2516            mLayoutAlignment = null;
2517        }
2518
2519        mGravity = gravity;
2520
2521        if (mLayout != null && newLayout) {
2522            // XXX this is heavy-handed because no actual content changes.
2523            int want = mLayout.getWidth();
2524            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2525
2526            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2527                          mRight - mLeft - getCompoundPaddingLeft() -
2528                          getCompoundPaddingRight(), true);
2529        }
2530    }
2531
2532    /**
2533     * Returns the horizontal and vertical alignment of this TextView.
2534     *
2535     * @see android.view.Gravity
2536     * @attr ref android.R.styleable#TextView_gravity
2537     */
2538    public int getGravity() {
2539        return mGravity;
2540    }
2541
2542    /**
2543     * @return the flags on the Paint being used to display the text.
2544     * @see Paint#getFlags
2545     */
2546    public int getPaintFlags() {
2547        return mTextPaint.getFlags();
2548    }
2549
2550    /**
2551     * Sets flags on the Paint being used to display the text and
2552     * reflows the text if they are different from the old flags.
2553     * @see Paint#setFlags
2554     */
2555    @android.view.RemotableViewMethod
2556    public void setPaintFlags(int flags) {
2557        if (mTextPaint.getFlags() != flags) {
2558            mTextPaint.setFlags(flags);
2559
2560            if (mLayout != null) {
2561                nullLayouts();
2562                requestLayout();
2563                invalidate();
2564            }
2565        }
2566    }
2567
2568    /**
2569     * Sets whether the text should be allowed to be wider than the
2570     * View is.  If false, it will be wrapped to the width of the View.
2571     *
2572     * @attr ref android.R.styleable#TextView_scrollHorizontally
2573     */
2574    public void setHorizontallyScrolling(boolean whether) {
2575        if (mHorizontallyScrolling != whether) {
2576            mHorizontallyScrolling = whether;
2577
2578            if (mLayout != null) {
2579                nullLayouts();
2580                requestLayout();
2581                invalidate();
2582            }
2583        }
2584    }
2585
2586    /**
2587     * Returns whether the text is allowed to be wider than the View is.
2588     * If false, the text will be wrapped to the width of the View.
2589     *
2590     * @attr ref android.R.styleable#TextView_scrollHorizontally
2591     * @hide
2592     */
2593    public boolean getHorizontallyScrolling() {
2594        return mHorizontallyScrolling;
2595    }
2596
2597    /**
2598     * Makes the TextView at least this many lines tall.
2599     *
2600     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2601     * set this value to 1.
2602     *
2603     * @attr ref android.R.styleable#TextView_minLines
2604     */
2605    @android.view.RemotableViewMethod
2606    public void setMinLines(int minlines) {
2607        mMinimum = minlines;
2608        mMinMode = LINES;
2609
2610        requestLayout();
2611        invalidate();
2612    }
2613
2614    /**
2615     * Makes the TextView at least this many pixels tall.
2616     *
2617     * Setting this value overrides any other (minimum) number of lines setting.
2618     *
2619     * @attr ref android.R.styleable#TextView_minHeight
2620     */
2621    @android.view.RemotableViewMethod
2622    public void setMinHeight(int minHeight) {
2623        mMinimum = minHeight;
2624        mMinMode = PIXELS;
2625
2626        requestLayout();
2627        invalidate();
2628    }
2629
2630    /**
2631     * Makes the TextView at most this many lines tall.
2632     *
2633     * Setting this value overrides any other (maximum) height setting.
2634     *
2635     * @attr ref android.R.styleable#TextView_maxLines
2636     */
2637    @android.view.RemotableViewMethod
2638    public void setMaxLines(int maxlines) {
2639        mMaximum = maxlines;
2640        mMaxMode = LINES;
2641
2642        requestLayout();
2643        invalidate();
2644    }
2645
2646    /**
2647     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2648     * {@link #setMaxLines(int)} method.
2649     *
2650     * Setting this value overrides any other (maximum) number of lines setting.
2651     *
2652     * @attr ref android.R.styleable#TextView_maxHeight
2653     */
2654    @android.view.RemotableViewMethod
2655    public void setMaxHeight(int maxHeight) {
2656        mMaximum = maxHeight;
2657        mMaxMode = PIXELS;
2658
2659        requestLayout();
2660        invalidate();
2661    }
2662
2663    /**
2664     * Makes the TextView exactly this many lines tall.
2665     *
2666     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2667     * height setting. A single line TextView will set this value to 1.
2668     *
2669     * @attr ref android.R.styleable#TextView_lines
2670     */
2671    @android.view.RemotableViewMethod
2672    public void setLines(int lines) {
2673        mMaximum = mMinimum = lines;
2674        mMaxMode = mMinMode = LINES;
2675
2676        requestLayout();
2677        invalidate();
2678    }
2679
2680    /**
2681     * Makes the TextView exactly this many pixels tall.
2682     * You could do the same thing by specifying this number in the
2683     * LayoutParams.
2684     *
2685     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2686     * height setting.
2687     *
2688     * @attr ref android.R.styleable#TextView_height
2689     */
2690    @android.view.RemotableViewMethod
2691    public void setHeight(int pixels) {
2692        mMaximum = mMinimum = pixels;
2693        mMaxMode = mMinMode = PIXELS;
2694
2695        requestLayout();
2696        invalidate();
2697    }
2698
2699    /**
2700     * Makes the TextView at least this many ems wide
2701     *
2702     * @attr ref android.R.styleable#TextView_minEms
2703     */
2704    @android.view.RemotableViewMethod
2705    public void setMinEms(int minems) {
2706        mMinWidth = minems;
2707        mMinWidthMode = EMS;
2708
2709        requestLayout();
2710        invalidate();
2711    }
2712
2713    /**
2714     * Makes the TextView at least this many pixels wide
2715     *
2716     * @attr ref android.R.styleable#TextView_minWidth
2717     */
2718    @android.view.RemotableViewMethod
2719    public void setMinWidth(int minpixels) {
2720        mMinWidth = minpixels;
2721        mMinWidthMode = PIXELS;
2722
2723        requestLayout();
2724        invalidate();
2725    }
2726
2727    /**
2728     * Makes the TextView at most this many ems wide
2729     *
2730     * @attr ref android.R.styleable#TextView_maxEms
2731     */
2732    @android.view.RemotableViewMethod
2733    public void setMaxEms(int maxems) {
2734        mMaxWidth = maxems;
2735        mMaxWidthMode = EMS;
2736
2737        requestLayout();
2738        invalidate();
2739    }
2740
2741    /**
2742     * Makes the TextView at most this many pixels wide
2743     *
2744     * @attr ref android.R.styleable#TextView_maxWidth
2745     */
2746    @android.view.RemotableViewMethod
2747    public void setMaxWidth(int maxpixels) {
2748        mMaxWidth = maxpixels;
2749        mMaxWidthMode = PIXELS;
2750
2751        requestLayout();
2752        invalidate();
2753    }
2754
2755    /**
2756     * Makes the TextView exactly this many ems wide
2757     *
2758     * @attr ref android.R.styleable#TextView_ems
2759     */
2760    @android.view.RemotableViewMethod
2761    public void setEms(int ems) {
2762        mMaxWidth = mMinWidth = ems;
2763        mMaxWidthMode = mMinWidthMode = EMS;
2764
2765        requestLayout();
2766        invalidate();
2767    }
2768
2769    /**
2770     * Makes the TextView exactly this many pixels wide.
2771     * You could do the same thing by specifying this number in the
2772     * LayoutParams.
2773     *
2774     * @attr ref android.R.styleable#TextView_width
2775     */
2776    @android.view.RemotableViewMethod
2777    public void setWidth(int pixels) {
2778        mMaxWidth = mMinWidth = pixels;
2779        mMaxWidthMode = mMinWidthMode = PIXELS;
2780
2781        requestLayout();
2782        invalidate();
2783    }
2784
2785
2786    /**
2787     * Sets line spacing for this TextView.  Each line will have its height
2788     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2789     *
2790     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2791     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2792     */
2793    public void setLineSpacing(float add, float mult) {
2794        if (mSpacingAdd != add || mSpacingMult != mult) {
2795            mSpacingAdd = add;
2796            mSpacingMult = mult;
2797
2798            if (mLayout != null) {
2799                nullLayouts();
2800                requestLayout();
2801                invalidate();
2802            }
2803        }
2804    }
2805
2806    /**
2807     * Convenience method: Append the specified text to the TextView's
2808     * display buffer, upgrading it to BufferType.EDITABLE if it was
2809     * not already editable.
2810     */
2811    public final void append(CharSequence text) {
2812        append(text, 0, text.length());
2813    }
2814
2815    /**
2816     * Convenience method: Append the specified text slice to the TextView's
2817     * display buffer, upgrading it to BufferType.EDITABLE if it was
2818     * not already editable.
2819     */
2820    public void append(CharSequence text, int start, int end) {
2821        if (!(mText instanceof Editable)) {
2822            setText(mText, BufferType.EDITABLE);
2823        }
2824
2825        ((Editable) mText).append(text, start, end);
2826    }
2827
2828    private void updateTextColors() {
2829        boolean inval = false;
2830        int color = mTextColor.getColorForState(getDrawableState(), 0);
2831        if (color != mCurTextColor) {
2832            mCurTextColor = color;
2833            inval = true;
2834        }
2835        if (mLinkTextColor != null) {
2836            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2837            if (color != mTextPaint.linkColor) {
2838                mTextPaint.linkColor = color;
2839                inval = true;
2840            }
2841        }
2842        if (mHintTextColor != null) {
2843            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2844            if (color != mCurHintTextColor && mText.length() == 0) {
2845                mCurHintTextColor = color;
2846                inval = true;
2847            }
2848        }
2849        if (inval) {
2850            invalidate();
2851        }
2852    }
2853
2854    @Override
2855    protected void drawableStateChanged() {
2856        super.drawableStateChanged();
2857        if (mTextColor != null && mTextColor.isStateful()
2858                || (mHintTextColor != null && mHintTextColor.isStateful())
2859                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2860            updateTextColors();
2861        }
2862
2863        final Drawables dr = mDrawables;
2864        if (dr != null) {
2865            int[] state = getDrawableState();
2866            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2867                dr.mDrawableTop.setState(state);
2868            }
2869            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2870                dr.mDrawableBottom.setState(state);
2871            }
2872            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2873                dr.mDrawableLeft.setState(state);
2874            }
2875            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2876                dr.mDrawableRight.setState(state);
2877            }
2878            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2879                dr.mDrawableStart.setState(state);
2880            }
2881            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2882                dr.mDrawableEnd.setState(state);
2883            }
2884        }
2885    }
2886
2887    /**
2888     * User interface state that is stored by TextView for implementing
2889     * {@link View#onSaveInstanceState}.
2890     */
2891    public static class SavedState extends BaseSavedState {
2892        int selStart;
2893        int selEnd;
2894        CharSequence text;
2895        boolean frozenWithFocus;
2896        CharSequence error;
2897
2898        SavedState(Parcelable superState) {
2899            super(superState);
2900        }
2901
2902        @Override
2903        public void writeToParcel(Parcel out, int flags) {
2904            super.writeToParcel(out, flags);
2905            out.writeInt(selStart);
2906            out.writeInt(selEnd);
2907            out.writeInt(frozenWithFocus ? 1 : 0);
2908            TextUtils.writeToParcel(text, out, flags);
2909
2910            if (error == null) {
2911                out.writeInt(0);
2912            } else {
2913                out.writeInt(1);
2914                TextUtils.writeToParcel(error, out, flags);
2915            }
2916        }
2917
2918        @Override
2919        public String toString() {
2920            String str = "TextView.SavedState{"
2921                    + Integer.toHexString(System.identityHashCode(this))
2922                    + " start=" + selStart + " end=" + selEnd;
2923            if (text != null) {
2924                str += " text=" + text;
2925            }
2926            return str + "}";
2927        }
2928
2929        @SuppressWarnings("hiding")
2930        public static final Parcelable.Creator<SavedState> CREATOR
2931                = new Parcelable.Creator<SavedState>() {
2932            public SavedState createFromParcel(Parcel in) {
2933                return new SavedState(in);
2934            }
2935
2936            public SavedState[] newArray(int size) {
2937                return new SavedState[size];
2938            }
2939        };
2940
2941        private SavedState(Parcel in) {
2942            super(in);
2943            selStart = in.readInt();
2944            selEnd = in.readInt();
2945            frozenWithFocus = (in.readInt() != 0);
2946            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2947
2948            if (in.readInt() != 0) {
2949                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2950            }
2951        }
2952    }
2953
2954    @Override
2955    public Parcelable onSaveInstanceState() {
2956        Parcelable superState = super.onSaveInstanceState();
2957
2958        // Save state if we are forced to
2959        boolean save = mFreezesText;
2960        int start = 0;
2961        int end = 0;
2962
2963        if (mText != null) {
2964            start = getSelectionStart();
2965            end = getSelectionEnd();
2966            if (start >= 0 || end >= 0) {
2967                // Or save state if there is a selection
2968                save = true;
2969            }
2970        }
2971
2972        if (save) {
2973            SavedState ss = new SavedState(superState);
2974            // XXX Should also save the current scroll position!
2975            ss.selStart = start;
2976            ss.selEnd = end;
2977
2978            if (mText instanceof Spanned) {
2979                /*
2980                 * Calling setText() strips off any ChangeWatchers;
2981                 * strip them now to avoid leaking references.
2982                 * But do it to a copy so that if there are any
2983                 * further changes to the text of this view, it
2984                 * won't get into an inconsistent state.
2985                 */
2986
2987                Spannable sp = new SpannableString(mText);
2988
2989                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2990                    sp.removeSpan(cw);
2991                }
2992
2993                removeMisspelledSpans(sp);
2994                sp.removeSpan(mSuggestionRangeSpan);
2995
2996                ss.text = sp;
2997            } else {
2998                ss.text = mText.toString();
2999            }
3000
3001            if (isFocused() && start >= 0 && end >= 0) {
3002                ss.frozenWithFocus = true;
3003            }
3004
3005            ss.error = mError;
3006
3007            return ss;
3008        }
3009
3010        return superState;
3011    }
3012
3013    void removeMisspelledSpans(Spannable spannable) {
3014        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
3015                SuggestionSpan.class);
3016        for (int i = 0; i < suggestionSpans.length; i++) {
3017            int flags = suggestionSpans[i].getFlags();
3018            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
3019                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
3020                spannable.removeSpan(suggestionSpans[i]);
3021            }
3022        }
3023    }
3024
3025    @Override
3026    public void onRestoreInstanceState(Parcelable state) {
3027        if (!(state instanceof SavedState)) {
3028            super.onRestoreInstanceState(state);
3029            return;
3030        }
3031
3032        SavedState ss = (SavedState)state;
3033        super.onRestoreInstanceState(ss.getSuperState());
3034
3035        // XXX restore buffer type too, as well as lots of other stuff
3036        if (ss.text != null) {
3037            setText(ss.text);
3038        }
3039
3040        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3041            if (mText instanceof Spannable) {
3042                int len = mText.length();
3043
3044                if (ss.selStart > len || ss.selEnd > len) {
3045                    String restored = "";
3046
3047                    if (ss.text != null) {
3048                        restored = "(restored) ";
3049                    }
3050
3051                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3052                          "/" + ss.selEnd + " out of range for " + restored +
3053                          "text " + mText);
3054                } else {
3055                    Selection.setSelection((Spannable) mText, ss.selStart,
3056                                           ss.selEnd);
3057
3058                    if (ss.frozenWithFocus) {
3059                        mFrozenWithFocus = true;
3060                    }
3061                }
3062            }
3063        }
3064
3065        if (ss.error != null) {
3066            final CharSequence error = ss.error;
3067            // Display the error later, after the first layout pass
3068            post(new Runnable() {
3069                public void run() {
3070                    setError(error);
3071                }
3072            });
3073        }
3074    }
3075
3076    /**
3077     * Control whether this text view saves its entire text contents when
3078     * freezing to an icicle, in addition to dynamic state such as cursor
3079     * position.  By default this is false, not saving the text.  Set to true
3080     * if the text in the text view is not being saved somewhere else in
3081     * persistent storage (such as in a content provider) so that if the
3082     * view is later thawed the user will not lose their data.
3083     *
3084     * @param freezesText Controls whether a frozen icicle should include the
3085     * entire text data: true to include it, false to not.
3086     *
3087     * @attr ref android.R.styleable#TextView_freezesText
3088     */
3089    @android.view.RemotableViewMethod
3090    public void setFreezesText(boolean freezesText) {
3091        mFreezesText = freezesText;
3092    }
3093
3094    /**
3095     * Return whether this text view is including its entire text contents
3096     * in frozen icicles.
3097     *
3098     * @return Returns true if text is included, false if it isn't.
3099     *
3100     * @see #setFreezesText
3101     */
3102    public boolean getFreezesText() {
3103        return mFreezesText;
3104    }
3105
3106    ///////////////////////////////////////////////////////////////////////////
3107
3108    /**
3109     * Sets the Factory used to create new Editables.
3110     */
3111    public final void setEditableFactory(Editable.Factory factory) {
3112        mEditableFactory = factory;
3113        setText(mText);
3114    }
3115
3116    /**
3117     * Sets the Factory used to create new Spannables.
3118     */
3119    public final void setSpannableFactory(Spannable.Factory factory) {
3120        mSpannableFactory = factory;
3121        setText(mText);
3122    }
3123
3124    /**
3125     * Sets the string value of the TextView. TextView <em>does not</em> accept
3126     * HTML-like formatting, which you can do with text strings in XML resource files.
3127     * To style your strings, attach android.text.style.* objects to a
3128     * {@link android.text.SpannableString SpannableString}, or see the
3129     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3130     * Available Resource Types</a> documentation for an example of setting
3131     * formatted text in the XML resource file.
3132     *
3133     * @attr ref android.R.styleable#TextView_text
3134     */
3135    @android.view.RemotableViewMethod
3136    public final void setText(CharSequence text) {
3137        setText(text, mBufferType);
3138    }
3139
3140    /**
3141     * Like {@link #setText(CharSequence)},
3142     * except that the cursor position (if any) is retained in the new text.
3143     *
3144     * @param text The new text to place in the text view.
3145     *
3146     * @see #setText(CharSequence)
3147     */
3148    @android.view.RemotableViewMethod
3149    public final void setTextKeepState(CharSequence text) {
3150        setTextKeepState(text, mBufferType);
3151    }
3152
3153    /**
3154     * Sets the text that this TextView is to display (see
3155     * {@link #setText(CharSequence)}) and also sets whether it is stored
3156     * in a styleable/spannable buffer and whether it is editable.
3157     *
3158     * @attr ref android.R.styleable#TextView_text
3159     * @attr ref android.R.styleable#TextView_bufferType
3160     */
3161    public void setText(CharSequence text, BufferType type) {
3162        setText(text, type, true, 0);
3163
3164        if (mCharWrapper != null) {
3165            mCharWrapper.mChars = null;
3166        }
3167    }
3168
3169    private void setText(CharSequence text, BufferType type,
3170                         boolean notifyBefore, int oldlen) {
3171        if (text == null) {
3172            text = "";
3173        }
3174
3175        // If suggestions are not enabled, remove the suggestion spans from the text
3176        if (!isSuggestionsEnabled()) {
3177            text = removeSuggestionSpans(text);
3178        }
3179
3180        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3181
3182        if (text instanceof Spanned &&
3183            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3184            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3185                setHorizontalFadingEdgeEnabled(true);
3186                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3187            } else {
3188                setHorizontalFadingEdgeEnabled(false);
3189                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3190            }
3191            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3192        }
3193
3194        int n = mFilters.length;
3195        for (int i = 0; i < n; i++) {
3196            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3197                                                  EMPTY_SPANNED, 0, 0);
3198            if (out != null) {
3199                text = out;
3200            }
3201        }
3202
3203        if (notifyBefore) {
3204            if (mText != null) {
3205                oldlen = mText.length();
3206                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3207            } else {
3208                sendBeforeTextChanged("", 0, 0, text.length());
3209            }
3210        }
3211
3212        boolean needEditableForNotification = false;
3213
3214        if (mListeners != null && mListeners.size() != 0) {
3215            needEditableForNotification = true;
3216        }
3217
3218        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3219            Editable t = mEditableFactory.newEditable(text);
3220            text = t;
3221            setFilters(t, mFilters);
3222            InputMethodManager imm = InputMethodManager.peekInstance();
3223            if (imm != null) imm.restartInput(this);
3224        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3225            text = mSpannableFactory.newSpannable(text);
3226        } else if (!(text instanceof CharWrapper)) {
3227            text = TextUtils.stringOrSpannedString(text);
3228        }
3229
3230        if (mAutoLinkMask != 0) {
3231            Spannable s2;
3232
3233            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3234                s2 = (Spannable) text;
3235            } else {
3236                s2 = mSpannableFactory.newSpannable(text);
3237            }
3238
3239            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3240                text = s2;
3241                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3242
3243                /*
3244                 * We must go ahead and set the text before changing the
3245                 * movement method, because setMovementMethod() may call
3246                 * setText() again to try to upgrade the buffer type.
3247                 */
3248                mText = text;
3249
3250                // Do not change the movement method for text that support text selection as it
3251                // would prevent an arbitrary cursor displacement.
3252                if (mLinksClickable && !textCanBeSelected()) {
3253                    setMovementMethod(LinkMovementMethod.getInstance());
3254                }
3255            }
3256        }
3257
3258        mBufferType = type;
3259        mText = text;
3260
3261        if (mTransformation == null) {
3262            mTransformed = text;
3263        } else {
3264            mTransformed = mTransformation.getTransformation(text, this);
3265        }
3266
3267        final int textLength = text.length();
3268
3269        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3270            Spannable sp = (Spannable) text;
3271
3272            // Remove any ChangeWatchers that might have come
3273            // from other TextViews.
3274            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3275            final int count = watchers.length;
3276            for (int i = 0; i < count; i++)
3277                sp.removeSpan(watchers[i]);
3278
3279            if (mChangeWatcher == null)
3280                mChangeWatcher = new ChangeWatcher();
3281
3282            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3283                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3284
3285            if (mInput != null) {
3286                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3287            }
3288
3289            if (mTransformation != null) {
3290                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3291            }
3292
3293            if (mMovement != null) {
3294                mMovement.initialize(this, (Spannable) text);
3295
3296                /*
3297                 * Initializing the movement method will have set the
3298                 * selection, so reset mSelectionMoved to keep that from
3299                 * interfering with the normal on-focus selection-setting.
3300                 */
3301                mSelectionMoved = false;
3302            }
3303        }
3304
3305        if (mLayout != null) {
3306            checkForRelayout();
3307        }
3308
3309        sendOnTextChanged(text, 0, oldlen, textLength);
3310        onTextChanged(text, 0, oldlen, textLength);
3311
3312        if (needEditableForNotification) {
3313            sendAfterTextChanged((Editable) text);
3314        }
3315
3316        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3317        prepareCursorControllers();
3318    }
3319
3320    /**
3321     * Sets the TextView to display the specified slice of the specified
3322     * char array.  You must promise that you will not change the contents
3323     * of the array except for right before another call to setText(),
3324     * since the TextView has no way to know that the text
3325     * has changed and that it needs to invalidate and re-layout.
3326     */
3327    public final void setText(char[] text, int start, int len) {
3328        int oldlen = 0;
3329
3330        if (start < 0 || len < 0 || start + len > text.length) {
3331            throw new IndexOutOfBoundsException(start + ", " + len);
3332        }
3333
3334        /*
3335         * We must do the before-notification here ourselves because if
3336         * the old text is a CharWrapper we destroy it before calling
3337         * into the normal path.
3338         */
3339        if (mText != null) {
3340            oldlen = mText.length();
3341            sendBeforeTextChanged(mText, 0, oldlen, len);
3342        } else {
3343            sendBeforeTextChanged("", 0, 0, len);
3344        }
3345
3346        if (mCharWrapper == null) {
3347            mCharWrapper = new CharWrapper(text, start, len);
3348        } else {
3349            mCharWrapper.set(text, start, len);
3350        }
3351
3352        setText(mCharWrapper, mBufferType, false, oldlen);
3353    }
3354
3355    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3356        private char[] mChars;
3357        private int mStart, mLength;
3358
3359        public CharWrapper(char[] chars, int start, int len) {
3360            mChars = chars;
3361            mStart = start;
3362            mLength = len;
3363        }
3364
3365        /* package */ void set(char[] chars, int start, int len) {
3366            mChars = chars;
3367            mStart = start;
3368            mLength = len;
3369        }
3370
3371        public int length() {
3372            return mLength;
3373        }
3374
3375        public char charAt(int off) {
3376            return mChars[off + mStart];
3377        }
3378
3379        @Override
3380        public String toString() {
3381            return new String(mChars, mStart, mLength);
3382        }
3383
3384        public CharSequence subSequence(int start, int end) {
3385            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3386                throw new IndexOutOfBoundsException(start + ", " + end);
3387            }
3388
3389            return new String(mChars, start + mStart, end - start);
3390        }
3391
3392        public void getChars(int start, int end, char[] buf, int off) {
3393            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3394                throw new IndexOutOfBoundsException(start + ", " + end);
3395            }
3396
3397            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3398        }
3399
3400        public void drawText(Canvas c, int start, int end,
3401                             float x, float y, Paint p) {
3402            c.drawText(mChars, start + mStart, end - start, x, y, p);
3403        }
3404
3405        public void drawTextRun(Canvas c, int start, int end,
3406                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3407            int count = end - start;
3408            int contextCount = contextEnd - contextStart;
3409            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3410                    contextCount, x, y, flags, p);
3411        }
3412
3413        public float measureText(int start, int end, Paint p) {
3414            return p.measureText(mChars, start + mStart, end - start);
3415        }
3416
3417        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3418            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3419        }
3420
3421        public float getTextRunAdvances(int start, int end, int contextStart,
3422                int contextEnd, int flags, float[] advances, int advancesIndex,
3423                Paint p) {
3424            int count = end - start;
3425            int contextCount = contextEnd - contextStart;
3426            return p.getTextRunAdvances(mChars, start + mStart, count,
3427                    contextStart + mStart, contextCount, flags, advances,
3428                    advancesIndex);
3429        }
3430
3431        public float getTextRunAdvances(int start, int end, int contextStart,
3432                int contextEnd, int flags, float[] advances, int advancesIndex,
3433                Paint p, int reserved) {
3434            int count = end - start;
3435            int contextCount = contextEnd - contextStart;
3436            return p.getTextRunAdvances(mChars, start + mStart, count,
3437                    contextStart + mStart, contextCount, flags, advances,
3438                    advancesIndex, reserved);
3439        }
3440
3441        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3442                int offset, int cursorOpt, Paint p) {
3443            int contextCount = contextEnd - contextStart;
3444            return p.getTextRunCursor(mChars, contextStart + mStart,
3445                    contextCount, flags, offset + mStart, cursorOpt);
3446        }
3447    }
3448
3449    /**
3450     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3451     * except that the cursor position (if any) is retained in the new text.
3452     *
3453     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3454     */
3455    public final void setTextKeepState(CharSequence text, BufferType type) {
3456        int start = getSelectionStart();
3457        int end = getSelectionEnd();
3458        int len = text.length();
3459
3460        setText(text, type);
3461
3462        if (start >= 0 || end >= 0) {
3463            if (mText instanceof Spannable) {
3464                Selection.setSelection((Spannable) mText,
3465                                       Math.max(0, Math.min(start, len)),
3466                                       Math.max(0, Math.min(end, len)));
3467            }
3468        }
3469    }
3470
3471    @android.view.RemotableViewMethod
3472    public final void setText(int resid) {
3473        setText(getContext().getResources().getText(resid));
3474    }
3475
3476    public final void setText(int resid, BufferType type) {
3477        setText(getContext().getResources().getText(resid), type);
3478    }
3479
3480    /**
3481     * Sets the text to be displayed when the text of the TextView is empty.
3482     * Null means to use the normal empty text. The hint does not currently
3483     * participate in determining the size of the view.
3484     *
3485     * @attr ref android.R.styleable#TextView_hint
3486     */
3487    @android.view.RemotableViewMethod
3488    public final void setHint(CharSequence hint) {
3489        mHint = TextUtils.stringOrSpannedString(hint);
3490
3491        if (mLayout != null) {
3492            checkForRelayout();
3493        }
3494
3495        if (mText.length() == 0) {
3496            invalidate();
3497        }
3498    }
3499
3500    /**
3501     * Sets the text to be displayed when the text of the TextView is empty,
3502     * from a resource.
3503     *
3504     * @attr ref android.R.styleable#TextView_hint
3505     */
3506    @android.view.RemotableViewMethod
3507    public final void setHint(int resid) {
3508        setHint(getContext().getResources().getText(resid));
3509    }
3510
3511    /**
3512     * Returns the hint that is displayed when the text of the TextView
3513     * is empty.
3514     *
3515     * @attr ref android.R.styleable#TextView_hint
3516     */
3517    @ViewDebug.CapturedViewProperty
3518    public CharSequence getHint() {
3519        return mHint;
3520    }
3521
3522    private static boolean isMultilineInputType(int type) {
3523        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3524            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3525    }
3526
3527    /**
3528     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3529     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3530     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3531     * then a soft keyboard will not be displayed for this text view.
3532     *
3533     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3534     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3535     * type.
3536     *
3537     * @see #getInputType()
3538     * @see #setRawInputType(int)
3539     * @see android.text.InputType
3540     * @attr ref android.R.styleable#TextView_inputType
3541     */
3542    public void setInputType(int type) {
3543        final boolean wasPassword = isPasswordInputType(mInputType);
3544        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3545        setInputType(type, false);
3546        final boolean isPassword = isPasswordInputType(type);
3547        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3548        boolean forceUpdate = false;
3549        if (isPassword) {
3550            setTransformationMethod(PasswordTransformationMethod.getInstance());
3551            setTypefaceByIndex(MONOSPACE, 0);
3552        } else if (isVisiblePassword) {
3553            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3554                forceUpdate = true;
3555            }
3556            setTypefaceByIndex(MONOSPACE, 0);
3557        } else if (wasPassword || wasVisiblePassword) {
3558            // not in password mode, clean up typeface and transformation
3559            setTypefaceByIndex(-1, -1);
3560            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3561                forceUpdate = true;
3562            }
3563        }
3564
3565        boolean singleLine = !isMultilineInputType(type);
3566
3567        // We need to update the single line mode if it has changed or we
3568        // were previously in password mode.
3569        if (mSingleLine != singleLine || forceUpdate) {
3570            // Change single line mode, but only change the transformation if
3571            // we are not in password mode.
3572            applySingleLine(singleLine, !isPassword, true);
3573        }
3574
3575        if (!isSuggestionsEnabled()) {
3576            mText = removeSuggestionSpans(mText);
3577        }
3578
3579        InputMethodManager imm = InputMethodManager.peekInstance();
3580        if (imm != null) imm.restartInput(this);
3581    }
3582
3583    /**
3584     * It would be better to rely on the input type for everything. A password inputType should have
3585     * a password transformation. We should hence use isPasswordInputType instead of this method.
3586     *
3587     * We should:
3588     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3589     * would install the correct transformation).
3590     * - Refuse the installation of a non-password transformation in setTransformation if the input
3591     * type is password.
3592     *
3593     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3594     * is useful since it matches what the user can see (obfuscated text or not).
3595     *
3596     * @return true if the current transformation method is of the password type.
3597     */
3598    private boolean hasPasswordTransformationMethod() {
3599        return mTransformation instanceof PasswordTransformationMethod;
3600    }
3601
3602    private static boolean isPasswordInputType(int inputType) {
3603        final int variation =
3604                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3605        return variation
3606                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3607                || variation
3608                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3609                || variation
3610                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3611    }
3612
3613    private static boolean isVisiblePasswordInputType(int inputType) {
3614        final int variation =
3615                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3616        return variation
3617                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3618    }
3619
3620    /**
3621     * Directly change the content type integer of the text view, without
3622     * modifying any other state.
3623     * @see #setInputType(int)
3624     * @see android.text.InputType
3625     * @attr ref android.R.styleable#TextView_inputType
3626     */
3627    public void setRawInputType(int type) {
3628        mInputType = type;
3629    }
3630
3631    private void setInputType(int type, boolean direct) {
3632        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3633        KeyListener input;
3634        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3635            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3636            TextKeyListener.Capitalize cap;
3637            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3638                cap = TextKeyListener.Capitalize.CHARACTERS;
3639            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3640                cap = TextKeyListener.Capitalize.WORDS;
3641            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3642                cap = TextKeyListener.Capitalize.SENTENCES;
3643            } else {
3644                cap = TextKeyListener.Capitalize.NONE;
3645            }
3646            input = TextKeyListener.getInstance(autotext, cap);
3647        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3648            input = DigitsKeyListener.getInstance(
3649                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3650                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3651        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3652            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3653                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3654                    input = DateKeyListener.getInstance();
3655                    break;
3656                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3657                    input = TimeKeyListener.getInstance();
3658                    break;
3659                default:
3660                    input = DateTimeKeyListener.getInstance();
3661                    break;
3662            }
3663        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3664            input = DialerKeyListener.getInstance();
3665        } else {
3666            input = TextKeyListener.getInstance();
3667        }
3668        setRawInputType(type);
3669        if (direct) mInput = input;
3670        else {
3671            setKeyListenerOnly(input);
3672        }
3673    }
3674
3675    /**
3676     * Get the type of the content.
3677     *
3678     * @see #setInputType(int)
3679     * @see android.text.InputType
3680     */
3681    public int getInputType() {
3682        return mInputType;
3683    }
3684
3685    /**
3686     * Change the editor type integer associated with the text view, which
3687     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3688     * has focus.
3689     * @see #getImeOptions
3690     * @see android.view.inputmethod.EditorInfo
3691     * @attr ref android.R.styleable#TextView_imeOptions
3692     */
3693    public void setImeOptions(int imeOptions) {
3694        if (mInputContentType == null) {
3695            mInputContentType = new InputContentType();
3696        }
3697        mInputContentType.imeOptions = imeOptions;
3698    }
3699
3700    /**
3701     * Get the type of the IME editor.
3702     *
3703     * @see #setImeOptions(int)
3704     * @see android.view.inputmethod.EditorInfo
3705     */
3706    public int getImeOptions() {
3707        return mInputContentType != null
3708                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3709    }
3710
3711    /**
3712     * Change the custom IME action associated with the text view, which
3713     * will be reported to an IME with {@link EditorInfo#actionLabel}
3714     * and {@link EditorInfo#actionId} when it has focus.
3715     * @see #getImeActionLabel
3716     * @see #getImeActionId
3717     * @see android.view.inputmethod.EditorInfo
3718     * @attr ref android.R.styleable#TextView_imeActionLabel
3719     * @attr ref android.R.styleable#TextView_imeActionId
3720     */
3721    public void setImeActionLabel(CharSequence label, int actionId) {
3722        if (mInputContentType == null) {
3723            mInputContentType = new InputContentType();
3724        }
3725        mInputContentType.imeActionLabel = label;
3726        mInputContentType.imeActionId = actionId;
3727    }
3728
3729    /**
3730     * Get the IME action label previous set with {@link #setImeActionLabel}.
3731     *
3732     * @see #setImeActionLabel
3733     * @see android.view.inputmethod.EditorInfo
3734     */
3735    public CharSequence getImeActionLabel() {
3736        return mInputContentType != null
3737                ? mInputContentType.imeActionLabel : null;
3738    }
3739
3740    /**
3741     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3742     *
3743     * @see #setImeActionLabel
3744     * @see android.view.inputmethod.EditorInfo
3745     */
3746    public int getImeActionId() {
3747        return mInputContentType != null
3748                ? mInputContentType.imeActionId : 0;
3749    }
3750
3751    /**
3752     * Set a special listener to be called when an action is performed
3753     * on the text view.  This will be called when the enter key is pressed,
3754     * or when an action supplied to the IME is selected by the user.  Setting
3755     * this means that the normal hard key event will not insert a newline
3756     * into the text view, even if it is multi-line; holding down the ALT
3757     * modifier will, however, allow the user to insert a newline character.
3758     */
3759    public void setOnEditorActionListener(OnEditorActionListener l) {
3760        if (mInputContentType == null) {
3761            mInputContentType = new InputContentType();
3762        }
3763        mInputContentType.onEditorActionListener = l;
3764    }
3765
3766    /**
3767     * Called when an attached input method calls
3768     * {@link InputConnection#performEditorAction(int)
3769     * InputConnection.performEditorAction()}
3770     * for this text view.  The default implementation will call your action
3771     * listener supplied to {@link #setOnEditorActionListener}, or perform
3772     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3773     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3774     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3775     * EditorInfo.IME_ACTION_DONE}.
3776     *
3777     * <p>For backwards compatibility, if no IME options have been set and the
3778     * text view would not normally advance focus on enter, then
3779     * the NEXT and DONE actions received here will be turned into an enter
3780     * key down/up pair to go through the normal key handling.
3781     *
3782     * @param actionCode The code of the action being performed.
3783     *
3784     * @see #setOnEditorActionListener
3785     */
3786    public void onEditorAction(int actionCode) {
3787        final InputContentType ict = mInputContentType;
3788        if (ict != null) {
3789            if (ict.onEditorActionListener != null) {
3790                if (ict.onEditorActionListener.onEditorAction(this,
3791                        actionCode, null)) {
3792                    return;
3793                }
3794            }
3795
3796            // This is the handling for some default action.
3797            // Note that for backwards compatibility we don't do this
3798            // default handling if explicit ime options have not been given,
3799            // instead turning this into the normal enter key codes that an
3800            // app may be expecting.
3801            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3802                View v = focusSearch(FOCUS_FORWARD);
3803                if (v != null) {
3804                    if (!v.requestFocus(FOCUS_FORWARD)) {
3805                        throw new IllegalStateException("focus search returned a view " +
3806                                "that wasn't able to take focus!");
3807                    }
3808                }
3809                return;
3810
3811            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3812                View v = focusSearch(FOCUS_BACKWARD);
3813                if (v != null) {
3814                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3815                        throw new IllegalStateException("focus search returned a view " +
3816                                "that wasn't able to take focus!");
3817                    }
3818                }
3819                return;
3820
3821            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3822                InputMethodManager imm = InputMethodManager.peekInstance();
3823                if (imm != null && imm.isActive(this)) {
3824                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3825                }
3826                return;
3827            }
3828        }
3829
3830        Handler h = getHandler();
3831        if (h != null) {
3832            long eventTime = SystemClock.uptimeMillis();
3833            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3834                    new KeyEvent(eventTime, eventTime,
3835                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3836                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3837                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3838                    | KeyEvent.FLAG_EDITOR_ACTION)));
3839            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3840                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3841                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3842                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3843                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3844                    | KeyEvent.FLAG_EDITOR_ACTION)));
3845        }
3846    }
3847
3848    /**
3849     * Set the private content type of the text, which is the
3850     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3851     * field that will be filled in when creating an input connection.
3852     *
3853     * @see #getPrivateImeOptions()
3854     * @see EditorInfo#privateImeOptions
3855     * @attr ref android.R.styleable#TextView_privateImeOptions
3856     */
3857    public void setPrivateImeOptions(String type) {
3858        if (mInputContentType == null) mInputContentType = new InputContentType();
3859        mInputContentType.privateImeOptions = type;
3860    }
3861
3862    /**
3863     * Get the private type of the content.
3864     *
3865     * @see #setPrivateImeOptions(String)
3866     * @see EditorInfo#privateImeOptions
3867     */
3868    public String getPrivateImeOptions() {
3869        return mInputContentType != null
3870                ? mInputContentType.privateImeOptions : null;
3871    }
3872
3873    /**
3874     * Set the extra input data of the text, which is the
3875     * {@link EditorInfo#extras TextBoxAttribute.extras}
3876     * Bundle that will be filled in when creating an input connection.  The
3877     * given integer is the resource ID of an XML resource holding an
3878     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3879     *
3880     * @see #getInputExtras(boolean)
3881     * @see EditorInfo#extras
3882     * @attr ref android.R.styleable#TextView_editorExtras
3883     */
3884    public void setInputExtras(int xmlResId)
3885            throws XmlPullParserException, IOException {
3886        XmlResourceParser parser = getResources().getXml(xmlResId);
3887        if (mInputContentType == null) mInputContentType = new InputContentType();
3888        mInputContentType.extras = new Bundle();
3889        getResources().parseBundleExtras(parser, mInputContentType.extras);
3890    }
3891
3892    /**
3893     * Retrieve the input extras currently associated with the text view, which
3894     * can be viewed as well as modified.
3895     *
3896     * @param create If true, the extras will be created if they don't already
3897     * exist.  Otherwise, null will be returned if none have been created.
3898     * @see #setInputExtras(int)
3899     * @see EditorInfo#extras
3900     * @attr ref android.R.styleable#TextView_editorExtras
3901     */
3902    public Bundle getInputExtras(boolean create) {
3903        if (mInputContentType == null) {
3904            if (!create) return null;
3905            mInputContentType = new InputContentType();
3906        }
3907        if (mInputContentType.extras == null) {
3908            if (!create) return null;
3909            mInputContentType.extras = new Bundle();
3910        }
3911        return mInputContentType.extras;
3912    }
3913
3914    /**
3915     * Returns the error message that was set to be displayed with
3916     * {@link #setError}, or <code>null</code> if no error was set
3917     * or if it the error was cleared by the widget after user input.
3918     */
3919    public CharSequence getError() {
3920        return mError;
3921    }
3922
3923    /**
3924     * Sets the right-hand compound drawable of the TextView to the "error"
3925     * icon and sets an error message that will be displayed in a popup when
3926     * the TextView has focus.  The icon and error message will be reset to
3927     * null when any key events cause changes to the TextView's text.  If the
3928     * <code>error</code> is <code>null</code>, the error message and icon
3929     * will be cleared.
3930     */
3931    @android.view.RemotableViewMethod
3932    public void setError(CharSequence error) {
3933        if (error == null) {
3934            setError(null, null);
3935        } else {
3936            Drawable dr = getContext().getResources().
3937                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3938
3939            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3940            setError(error, dr);
3941        }
3942    }
3943
3944    /**
3945     * Sets the right-hand compound drawable of the TextView to the specified
3946     * icon and sets an error message that will be displayed in a popup when
3947     * the TextView has focus.  The icon and error message will be reset to
3948     * null when any key events cause changes to the TextView's text.  The
3949     * drawable must already have had {@link Drawable#setBounds} set on it.
3950     * If the <code>error</code> is <code>null</code>, the error message will
3951     * be cleared (and you should provide a <code>null</code> icon as well).
3952     */
3953    public void setError(CharSequence error, Drawable icon) {
3954        error = TextUtils.stringOrSpannedString(error);
3955
3956        mError = error;
3957        mErrorWasChanged = true;
3958        final Drawables dr = mDrawables;
3959        if (dr != null) {
3960            switch (getResolvedLayoutDirection()) {
3961                default:
3962                case LAYOUT_DIRECTION_LTR:
3963                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3964                            dr.mDrawableBottom);
3965                    break;
3966                case LAYOUT_DIRECTION_RTL:
3967                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3968                            dr.mDrawableBottom);
3969                    break;
3970            }
3971        } else {
3972            setCompoundDrawables(null, null, icon, null);
3973        }
3974
3975        if (error == null) {
3976            if (mPopup != null) {
3977                if (mPopup.isShowing()) {
3978                    mPopup.dismiss();
3979                }
3980
3981                mPopup = null;
3982            }
3983        } else {
3984            if (isFocused()) {
3985                showError();
3986            }
3987        }
3988    }
3989
3990    private void showError() {
3991        if (getWindowToken() == null) {
3992            mShowErrorAfterAttach = true;
3993            return;
3994        }
3995
3996        if (mPopup == null) {
3997            LayoutInflater inflater = LayoutInflater.from(getContext());
3998            final TextView err = (TextView) inflater.inflate(
3999                    com.android.internal.R.layout.textview_hint, null);
4000
4001            final float scale = getResources().getDisplayMetrics().density;
4002            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
4003            mPopup.setFocusable(false);
4004            // The user is entering text, so the input method is needed.  We
4005            // don't want the popup to be displayed on top of it.
4006            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
4007        }
4008
4009        TextView tv = (TextView) mPopup.getContentView();
4010        chooseSize(mPopup, mError, tv);
4011        tv.setText(mError);
4012
4013        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
4014        mPopup.fixDirection(mPopup.isAboveAnchor());
4015    }
4016
4017    private static class ErrorPopup extends PopupWindow {
4018        private boolean mAbove = false;
4019        private final TextView mView;
4020        private int mPopupInlineErrorBackgroundId = 0;
4021        private int mPopupInlineErrorAboveBackgroundId = 0;
4022
4023        ErrorPopup(TextView v, int width, int height) {
4024            super(v, width, height);
4025            mView = v;
4026            // Make sure the TextView has a background set as it will be used the first time it is
4027            // shown and positionned. Initialized with below background, which should have
4028            // dimensions identical to the above version for this to work (and is more likely).
4029            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4030                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4031            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4032        }
4033
4034        void fixDirection(boolean above) {
4035            mAbove = above;
4036
4037            if (above) {
4038                mPopupInlineErrorAboveBackgroundId =
4039                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4040                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4041            } else {
4042                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4043                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4044            }
4045
4046            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4047                mPopupInlineErrorBackgroundId);
4048        }
4049
4050        private int getResourceId(int currentId, int index) {
4051            if (currentId == 0) {
4052                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4053                        R.styleable.Theme);
4054                currentId = styledAttributes.getResourceId(index, 0);
4055                styledAttributes.recycle();
4056            }
4057            return currentId;
4058        }
4059
4060        @Override
4061        public void update(int x, int y, int w, int h, boolean force) {
4062            super.update(x, y, w, h, force);
4063
4064            boolean above = isAboveAnchor();
4065            if (above != mAbove) {
4066                fixDirection(above);
4067            }
4068        }
4069    }
4070
4071    /**
4072     * Returns the Y offset to make the pointy top of the error point
4073     * at the middle of the error icon.
4074     */
4075    private int getErrorX() {
4076        /*
4077         * The "25" is the distance between the point and the right edge
4078         * of the background
4079         */
4080        final float scale = getResources().getDisplayMetrics().density;
4081
4082        final Drawables dr = mDrawables;
4083        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4084                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4085    }
4086
4087    /**
4088     * Returns the Y offset to make the pointy top of the error point
4089     * at the bottom of the error icon.
4090     */
4091    private int getErrorY() {
4092        /*
4093         * Compound, not extended, because the icon is not clipped
4094         * if the text height is smaller.
4095         */
4096        final int compoundPaddingTop = getCompoundPaddingTop();
4097        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4098
4099        final Drawables dr = mDrawables;
4100        int icontop = compoundPaddingTop +
4101                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4102
4103        /*
4104         * The "2" is the distance between the point and the top edge
4105         * of the background.
4106         */
4107        final float scale = getResources().getDisplayMetrics().density;
4108        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4109                (int) (2 * scale + 0.5f);
4110    }
4111
4112    private void hideError() {
4113        if (mPopup != null) {
4114            if (mPopup.isShowing()) {
4115                mPopup.dismiss();
4116            }
4117        }
4118
4119        mShowErrorAfterAttach = false;
4120    }
4121
4122    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4123        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4124        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4125
4126        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4127                com.android.internal.R.dimen.textview_error_popup_default_width);
4128        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4129                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4130        float max = 0;
4131        for (int i = 0; i < l.getLineCount(); i++) {
4132            max = Math.max(max, l.getLineWidth(i));
4133        }
4134
4135        /*
4136         * Now set the popup size to be big enough for the text plus the border capped
4137         * to DEFAULT_MAX_POPUP_WIDTH
4138         */
4139        pop.setWidth(wid + (int) Math.ceil(max));
4140        pop.setHeight(ht + l.getHeight());
4141    }
4142
4143
4144    @Override
4145    protected boolean setFrame(int l, int t, int r, int b) {
4146        boolean result = super.setFrame(l, t, r, b);
4147
4148        if (mPopup != null) {
4149            TextView tv = (TextView) mPopup.getContentView();
4150            chooseSize(mPopup, mError, tv);
4151            mPopup.update(this, getErrorX(), getErrorY(),
4152                          mPopup.getWidth(), mPopup.getHeight());
4153        }
4154
4155        restartMarqueeIfNeeded();
4156
4157        return result;
4158    }
4159
4160    private void restartMarqueeIfNeeded() {
4161        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4162            mRestartMarquee = false;
4163            startMarquee();
4164        }
4165    }
4166
4167    /**
4168     * Sets the list of input filters that will be used if the buffer is
4169     * Editable.  Has no effect otherwise.
4170     *
4171     * @attr ref android.R.styleable#TextView_maxLength
4172     */
4173    public void setFilters(InputFilter[] filters) {
4174        if (filters == null) {
4175            throw new IllegalArgumentException();
4176        }
4177
4178        mFilters = filters;
4179
4180        if (mText instanceof Editable) {
4181            setFilters((Editable) mText, filters);
4182        }
4183    }
4184
4185    /**
4186     * Sets the list of input filters on the specified Editable,
4187     * and includes mInput in the list if it is an InputFilter.
4188     */
4189    private void setFilters(Editable e, InputFilter[] filters) {
4190        if (mInput instanceof InputFilter) {
4191            InputFilter[] nf = new InputFilter[filters.length + 1];
4192
4193            System.arraycopy(filters, 0, nf, 0, filters.length);
4194            nf[filters.length] = (InputFilter) mInput;
4195
4196            e.setFilters(nf);
4197        } else {
4198            e.setFilters(filters);
4199        }
4200    }
4201
4202    /**
4203     * Returns the current list of input filters.
4204     */
4205    public InputFilter[] getFilters() {
4206        return mFilters;
4207    }
4208
4209    /////////////////////////////////////////////////////////////////////////
4210
4211    private int getVerticalOffset(boolean forceNormal) {
4212        int voffset = 0;
4213        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4214
4215        Layout l = mLayout;
4216        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4217            l = mHintLayout;
4218        }
4219
4220        if (gravity != Gravity.TOP) {
4221            int boxht;
4222
4223            if (l == mHintLayout) {
4224                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4225                        getCompoundPaddingBottom();
4226            } else {
4227                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4228                        getExtendedPaddingBottom();
4229            }
4230            int textht = l.getHeight();
4231
4232            if (textht < boxht) {
4233                if (gravity == Gravity.BOTTOM)
4234                    voffset = boxht - textht;
4235                else // (gravity == Gravity.CENTER_VERTICAL)
4236                    voffset = (boxht - textht) >> 1;
4237            }
4238        }
4239        return voffset;
4240    }
4241
4242    private int getBottomVerticalOffset(boolean forceNormal) {
4243        int voffset = 0;
4244        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4245
4246        Layout l = mLayout;
4247        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4248            l = mHintLayout;
4249        }
4250
4251        if (gravity != Gravity.BOTTOM) {
4252            int boxht;
4253
4254            if (l == mHintLayout) {
4255                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4256                        getCompoundPaddingBottom();
4257            } else {
4258                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4259                        getExtendedPaddingBottom();
4260            }
4261            int textht = l.getHeight();
4262
4263            if (textht < boxht) {
4264                if (gravity == Gravity.TOP)
4265                    voffset = boxht - textht;
4266                else // (gravity == Gravity.CENTER_VERTICAL)
4267                    voffset = (boxht - textht) >> 1;
4268            }
4269        }
4270        return voffset;
4271    }
4272
4273    private void invalidateCursorPath() {
4274        if (mHighlightPathBogus) {
4275            invalidateCursor();
4276        } else {
4277            final int horizontalPadding = getCompoundPaddingLeft();
4278            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4279
4280            if (mCursorCount == 0) {
4281                synchronized (sTempRect) {
4282                    /*
4283                     * The reason for this concern about the thickness of the
4284                     * cursor and doing the floor/ceil on the coordinates is that
4285                     * some EditTexts (notably textfields in the Browser) have
4286                     * anti-aliased text where not all the characters are
4287                     * necessarily at integer-multiple locations.  This should
4288                     * make sure the entire cursor gets invalidated instead of
4289                     * sometimes missing half a pixel.
4290                     */
4291                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4292                    if (thick < 1.0f) {
4293                        thick = 1.0f;
4294                    }
4295
4296                    thick /= 2.0f;
4297
4298                    mHighlightPath.computeBounds(sTempRect, false);
4299
4300                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4301                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4302                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4303                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4304                }
4305            } else {
4306                for (int i = 0; i < mCursorCount; i++) {
4307                    Rect bounds = mCursorDrawable[i].getBounds();
4308                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4309                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4310                }
4311            }
4312        }
4313    }
4314
4315    private void invalidateCursor() {
4316        int where = getSelectionEnd();
4317
4318        invalidateCursor(where, where, where);
4319    }
4320
4321    private void invalidateCursor(int a, int b, int c) {
4322        if (a >= 0 || b >= 0 || c >= 0) {
4323            int start = Math.min(Math.min(a, b), c);
4324            int end = Math.max(Math.max(a, b), c);
4325            invalidateRegion(start, end, true /* Also invalidates blinking cursor */);
4326        }
4327    }
4328
4329    /**
4330     * Invalidates the region of text enclosed between the start and end text offsets.
4331     *
4332     * @hide
4333     */
4334    void invalidateRegion(int start, int end, boolean invalidateCursor) {
4335        if (mLayout == null) {
4336            invalidate();
4337        } else {
4338                int lineStart = mLayout.getLineForOffset(start);
4339                int top = mLayout.getLineTop(lineStart);
4340
4341                // This is ridiculous, but the descent from the line above
4342                // can hang down into the line we really want to redraw,
4343                // so we have to invalidate part of the line above to make
4344                // sure everything that needs to be redrawn really is.
4345                // (But not the whole line above, because that would cause
4346                // the same problem with the descenders on the line above it!)
4347                if (lineStart > 0) {
4348                    top -= mLayout.getLineDescent(lineStart - 1);
4349                }
4350
4351                int lineEnd;
4352
4353                if (start == end)
4354                    lineEnd = lineStart;
4355                else
4356                    lineEnd = mLayout.getLineForOffset(end);
4357
4358                int bottom = mLayout.getLineBottom(lineEnd);
4359
4360                if (invalidateCursor) {
4361                    for (int i = 0; i < mCursorCount; i++) {
4362                        Rect bounds = mCursorDrawable[i].getBounds();
4363                        top = Math.min(top, bounds.top);
4364                        bottom = Math.max(bottom, bounds.bottom);
4365                    }
4366                }
4367
4368                final int compoundPaddingLeft = getCompoundPaddingLeft();
4369                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4370
4371                int left, right;
4372                if (lineStart == lineEnd && !invalidateCursor) {
4373                    left = (int) mLayout.getPrimaryHorizontal(start);
4374                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4375                    left += compoundPaddingLeft;
4376                    right += compoundPaddingLeft;
4377                } else {
4378                    // Rectangle bounding box when the region spans several lines
4379                    left = compoundPaddingLeft;
4380                    right = getWidth() - getCompoundPaddingRight();
4381                }
4382
4383                invalidate(mScrollX + left, verticalPadding + top,
4384                        mScrollX + right, verticalPadding + bottom);
4385        }
4386    }
4387
4388    private void registerForPreDraw() {
4389        final ViewTreeObserver observer = getViewTreeObserver();
4390
4391        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4392            observer.addOnPreDrawListener(this);
4393            mPreDrawState = PREDRAW_PENDING;
4394        } else if (mPreDrawState == PREDRAW_DONE) {
4395            mPreDrawState = PREDRAW_PENDING;
4396        }
4397
4398        // else state is PREDRAW_PENDING, so keep waiting.
4399    }
4400
4401    /**
4402     * {@inheritDoc}
4403     */
4404    public boolean onPreDraw() {
4405        if (mPreDrawState != PREDRAW_PENDING) {
4406            return true;
4407        }
4408
4409        if (mLayout == null) {
4410            assumeLayout();
4411        }
4412
4413        boolean changed = false;
4414
4415        if (mMovement != null) {
4416            /* This code also provides auto-scrolling when a cursor is moved using a
4417             * CursorController (insertion point or selection limits).
4418             * For selection, ensure start or end is visible depending on controller's state.
4419             */
4420            int curs = getSelectionEnd();
4421            // Do not create the controller if it is not already created.
4422            if (mSelectionModifierCursorController != null &&
4423                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4424                curs = getSelectionStart();
4425            }
4426
4427            /*
4428             * TODO: This should really only keep the end in view if
4429             * it already was before the text changed.  I'm not sure
4430             * of a good way to tell from here if it was.
4431             */
4432            if (curs < 0 &&
4433                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4434                curs = mText.length();
4435            }
4436
4437            if (curs >= 0) {
4438                changed = bringPointIntoView(curs);
4439            }
4440        } else {
4441            changed = bringTextIntoView();
4442        }
4443
4444        // This has to be checked here since:
4445        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4446        //   a screen rotation) since layout is not yet initialized at that point.
4447        if (mCreatedWithASelection) {
4448            startSelectionActionMode();
4449            mCreatedWithASelection = false;
4450        }
4451
4452        // Phone specific code (there is no ExtractEditText on tablets).
4453        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4454        // not be set. Do the test here instead.
4455        if (this instanceof ExtractEditText && hasSelection()) {
4456            startSelectionActionMode();
4457        }
4458
4459        mPreDrawState = PREDRAW_DONE;
4460        return !changed;
4461    }
4462
4463    @Override
4464    protected void onAttachedToWindow() {
4465        super.onAttachedToWindow();
4466
4467        mTemporaryDetach = false;
4468
4469        if (mShowErrorAfterAttach) {
4470            showError();
4471            mShowErrorAfterAttach = false;
4472        }
4473
4474        final ViewTreeObserver observer = getViewTreeObserver();
4475        // No need to create the controller.
4476        // The get method will add the listener on controller creation.
4477        if (mInsertionPointCursorController != null) {
4478            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4479        }
4480        if (mSelectionModifierCursorController != null) {
4481            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4482        }
4483
4484        // Resolve drawables as the layout direction has been resolved
4485        resolveDrawables();
4486
4487        updateSpellCheckSpans(0, mText.length(), true /* create the spell checker if needed */);
4488    }
4489
4490    @Override
4491    protected void onDetachedFromWindow() {
4492        super.onDetachedFromWindow();
4493
4494        final ViewTreeObserver observer = getViewTreeObserver();
4495        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4496            observer.removeOnPreDrawListener(this);
4497            mPreDrawState = PREDRAW_NOT_REGISTERED;
4498        }
4499
4500        if (mError != null) {
4501            hideError();
4502        }
4503
4504        if (mBlink != null) {
4505            mBlink.removeCallbacks(mBlink);
4506        }
4507
4508        if (mInsertionPointCursorController != null) {
4509            mInsertionPointCursorController.onDetached();
4510        }
4511
4512        if (mSelectionModifierCursorController != null) {
4513            mSelectionModifierCursorController.onDetached();
4514        }
4515
4516        hideControllers();
4517
4518        resetResolvedDrawables();
4519
4520        if (mSpellChecker != null) {
4521            mSpellChecker.closeSession();
4522            // Forces the creation of a new SpellChecker next time this window is created.
4523            // Will handle the cases where the settings has been changed in the meantime.
4524            mSpellChecker = null;
4525        }
4526    }
4527
4528    @Override
4529    protected boolean isPaddingOffsetRequired() {
4530        return mShadowRadius != 0 || mDrawables != null;
4531    }
4532
4533    @Override
4534    protected int getLeftPaddingOffset() {
4535        return getCompoundPaddingLeft() - mPaddingLeft +
4536                (int) Math.min(0, mShadowDx - mShadowRadius);
4537    }
4538
4539    @Override
4540    protected int getTopPaddingOffset() {
4541        return (int) Math.min(0, mShadowDy - mShadowRadius);
4542    }
4543
4544    @Override
4545    protected int getBottomPaddingOffset() {
4546        return (int) Math.max(0, mShadowDy + mShadowRadius);
4547    }
4548
4549    @Override
4550    protected int getRightPaddingOffset() {
4551        return -(getCompoundPaddingRight() - mPaddingRight) +
4552                (int) Math.max(0, mShadowDx + mShadowRadius);
4553    }
4554
4555    @Override
4556    protected boolean verifyDrawable(Drawable who) {
4557        final boolean verified = super.verifyDrawable(who);
4558        if (!verified && mDrawables != null) {
4559            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4560                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4561                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4562        }
4563        return verified;
4564    }
4565
4566    @Override
4567    public void jumpDrawablesToCurrentState() {
4568        super.jumpDrawablesToCurrentState();
4569        if (mDrawables != null) {
4570            if (mDrawables.mDrawableLeft != null) {
4571                mDrawables.mDrawableLeft.jumpToCurrentState();
4572            }
4573            if (mDrawables.mDrawableTop != null) {
4574                mDrawables.mDrawableTop.jumpToCurrentState();
4575            }
4576            if (mDrawables.mDrawableRight != null) {
4577                mDrawables.mDrawableRight.jumpToCurrentState();
4578            }
4579            if (mDrawables.mDrawableBottom != null) {
4580                mDrawables.mDrawableBottom.jumpToCurrentState();
4581            }
4582            if (mDrawables.mDrawableStart != null) {
4583                mDrawables.mDrawableStart.jumpToCurrentState();
4584            }
4585            if (mDrawables.mDrawableEnd != null) {
4586                mDrawables.mDrawableEnd.jumpToCurrentState();
4587            }
4588        }
4589    }
4590
4591    @Override
4592    public void invalidateDrawable(Drawable drawable) {
4593        if (verifyDrawable(drawable)) {
4594            final Rect dirty = drawable.getBounds();
4595            int scrollX = mScrollX;
4596            int scrollY = mScrollY;
4597
4598            // IMPORTANT: The coordinates below are based on the coordinates computed
4599            // for each compound drawable in onDraw(). Make sure to update each section
4600            // accordingly.
4601            final TextView.Drawables drawables = mDrawables;
4602            if (drawables != null) {
4603                if (drawable == drawables.mDrawableLeft) {
4604                    final int compoundPaddingTop = getCompoundPaddingTop();
4605                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4606                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4607
4608                    scrollX += mPaddingLeft;
4609                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4610                } else if (drawable == drawables.mDrawableRight) {
4611                    final int compoundPaddingTop = getCompoundPaddingTop();
4612                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4613                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4614
4615                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4616                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4617                } else if (drawable == drawables.mDrawableTop) {
4618                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4619                    final int compoundPaddingRight = getCompoundPaddingRight();
4620                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4621
4622                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4623                    scrollY += mPaddingTop;
4624                } else if (drawable == drawables.mDrawableBottom) {
4625                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4626                    final int compoundPaddingRight = getCompoundPaddingRight();
4627                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4628
4629                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4630                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4631                }
4632            }
4633
4634            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4635                    dirty.right + scrollX, dirty.bottom + scrollY);
4636        }
4637    }
4638
4639    /**
4640     * @hide
4641     */
4642    @Override
4643    public int getResolvedLayoutDirection(Drawable who) {
4644        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4645        if (mDrawables != null) {
4646            final Drawables drawables = mDrawables;
4647            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4648                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4649                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4650                return getResolvedLayoutDirection();
4651            }
4652        }
4653        return super.getResolvedLayoutDirection(who);
4654    }
4655
4656    @Override
4657    protected boolean onSetAlpha(int alpha) {
4658        // Alpha is supported if and only if the drawing can be done in one pass.
4659        // TODO text with spans with a background color currently do not respect this alpha.
4660        if (getBackground() == null) {
4661            mCurrentAlpha = alpha;
4662            final Drawables dr = mDrawables;
4663            if (dr != null) {
4664                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4665                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4666                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4667                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4668                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4669                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4670            }
4671            return true;
4672        }
4673
4674        mCurrentAlpha = 255;
4675        return false;
4676    }
4677
4678    /**
4679     * When a TextView is used to display a useful piece of information to the user (such as a
4680     * contact's address), it should be made selectable, so that the user can select and copy this
4681     * content.
4682     *
4683     * Use {@link #setTextIsSelectable(boolean)} or the
4684     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4685     * selectable (text is not selectable by default).
4686     *
4687     * Note that this method simply returns the state of this flag. Although this flag has to be set
4688     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4689     * always be selected, independently of the value of this flag.
4690     *
4691     * @return True if the text displayed in this TextView can be selected by the user.
4692     *
4693     * @attr ref android.R.styleable#TextView_textIsSelectable
4694     */
4695    public boolean isTextSelectable() {
4696        return mTextIsSelectable;
4697    }
4698
4699    /**
4700     * Sets whether or not (default) the content of this view is selectable by the user.
4701     *
4702     * Note that this methods affect the {@link #setFocusable(boolean)},
4703     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4704     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4705     * customized.
4706     *
4707     * See {@link #isTextSelectable} for details.
4708     *
4709     * @param selectable Whether or not the content of this TextView should be selectable.
4710     */
4711    public void setTextIsSelectable(boolean selectable) {
4712        if (mTextIsSelectable == selectable) return;
4713
4714        mTextIsSelectable = selectable;
4715
4716        setFocusableInTouchMode(selectable);
4717        setFocusable(selectable);
4718        setClickable(selectable);
4719        setLongClickable(selectable);
4720
4721        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4722
4723        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4724        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4725
4726        // Called by setText above, but safer in case of future code changes
4727        prepareCursorControllers();
4728    }
4729
4730    @Override
4731    protected int[] onCreateDrawableState(int extraSpace) {
4732        final int[] drawableState;
4733
4734        if (mSingleLine) {
4735            drawableState = super.onCreateDrawableState(extraSpace);
4736        } else {
4737            drawableState = super.onCreateDrawableState(extraSpace + 1);
4738            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4739        }
4740
4741        if (mTextIsSelectable) {
4742            // Disable pressed state, which was introduced when TextView was made clickable.
4743            // Prevents text color change.
4744            // setClickable(false) would have a similar effect, but it also disables focus changes
4745            // and long press actions, which are both needed by text selection.
4746            final int length = drawableState.length;
4747            for (int i = 0; i < length; i++) {
4748                if (drawableState[i] == R.attr.state_pressed) {
4749                    final int[] nonPressedState = new int[length - 1];
4750                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4751                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4752                    return nonPressedState;
4753                }
4754            }
4755        }
4756
4757        return drawableState;
4758    }
4759
4760    @Override
4761    protected void onDraw(Canvas canvas) {
4762        if (mPreDrawState == PREDRAW_DONE) {
4763            final ViewTreeObserver observer = getViewTreeObserver();
4764            observer.removeOnPreDrawListener(this);
4765            mPreDrawState = PREDRAW_NOT_REGISTERED;
4766        }
4767
4768        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4769
4770        restartMarqueeIfNeeded();
4771
4772        // Draw the background for this view
4773        super.onDraw(canvas);
4774
4775        final int compoundPaddingLeft = getCompoundPaddingLeft();
4776        final int compoundPaddingTop = getCompoundPaddingTop();
4777        final int compoundPaddingRight = getCompoundPaddingRight();
4778        final int compoundPaddingBottom = getCompoundPaddingBottom();
4779        final int scrollX = mScrollX;
4780        final int scrollY = mScrollY;
4781        final int right = mRight;
4782        final int left = mLeft;
4783        final int bottom = mBottom;
4784        final int top = mTop;
4785
4786        final Drawables dr = mDrawables;
4787        if (dr != null) {
4788            /*
4789             * Compound, not extended, because the icon is not clipped
4790             * if the text height is smaller.
4791             */
4792
4793            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4794            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4795
4796            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4797            // Make sure to update invalidateDrawable() when changing this code.
4798            if (dr.mDrawableLeft != null) {
4799                canvas.save();
4800                canvas.translate(scrollX + mPaddingLeft,
4801                                 scrollY + compoundPaddingTop +
4802                                 (vspace - dr.mDrawableHeightLeft) / 2);
4803                dr.mDrawableLeft.draw(canvas);
4804                canvas.restore();
4805            }
4806
4807            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4808            // Make sure to update invalidateDrawable() when changing this code.
4809            if (dr.mDrawableRight != null) {
4810                canvas.save();
4811                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4812                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4813                dr.mDrawableRight.draw(canvas);
4814                canvas.restore();
4815            }
4816
4817            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4818            // Make sure to update invalidateDrawable() when changing this code.
4819            if (dr.mDrawableTop != null) {
4820                canvas.save();
4821                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4822                        scrollY + mPaddingTop);
4823                dr.mDrawableTop.draw(canvas);
4824                canvas.restore();
4825            }
4826
4827            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4828            // Make sure to update invalidateDrawable() when changing this code.
4829            if (dr.mDrawableBottom != null) {
4830                canvas.save();
4831                canvas.translate(scrollX + compoundPaddingLeft +
4832                        (hspace - dr.mDrawableWidthBottom) / 2,
4833                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4834                dr.mDrawableBottom.draw(canvas);
4835                canvas.restore();
4836            }
4837        }
4838
4839        int color = mCurTextColor;
4840
4841        if (mLayout == null) {
4842            assumeLayout();
4843        }
4844
4845        Layout layout = mLayout;
4846        int cursorcolor = color;
4847
4848        if (mHint != null && mText.length() == 0) {
4849            if (mHintTextColor != null) {
4850                color = mCurHintTextColor;
4851            }
4852
4853            layout = mHintLayout;
4854        }
4855
4856        mTextPaint.setColor(color);
4857        if (mCurrentAlpha != 255) {
4858            // If set, the alpha will override the color's alpha. Multiply the alphas.
4859            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4860        }
4861        mTextPaint.drawableState = getDrawableState();
4862
4863        canvas.save();
4864        /*  Would be faster if we didn't have to do this. Can we chop the
4865            (displayable) text so that we don't need to do this ever?
4866        */
4867
4868        int extendedPaddingTop = getExtendedPaddingTop();
4869        int extendedPaddingBottom = getExtendedPaddingBottom();
4870
4871        float clipLeft = compoundPaddingLeft + scrollX;
4872        float clipTop = extendedPaddingTop + scrollY;
4873        float clipRight = right - left - compoundPaddingRight + scrollX;
4874        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4875
4876        if (mShadowRadius != 0) {
4877            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4878            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4879
4880            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4881            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4882        }
4883
4884        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4885
4886        int voffsetText = 0;
4887        int voffsetCursor = 0;
4888
4889        // translate in by our padding
4890        {
4891            /* shortcircuit calling getVerticaOffset() */
4892            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4893                voffsetText = getVerticalOffset(false);
4894                voffsetCursor = getVerticalOffset(true);
4895            }
4896            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4897        }
4898
4899        final int layoutDirection = getResolvedLayoutDirection();
4900        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4901        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4902                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4903            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4904                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4905                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4906                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4907            }
4908
4909            if (mMarquee != null && mMarquee.isRunning()) {
4910                canvas.translate(-mMarquee.mScroll, 0.0f);
4911            }
4912        }
4913
4914        Path highlight = null;
4915        int selStart = -1, selEnd = -1;
4916        boolean drawCursor = false;
4917
4918        //  If there is no movement method, then there can be no selection.
4919        //  Check that first and attempt to skip everything having to do with
4920        //  the cursor.
4921        //  XXX This is not strictly true -- a program could set the
4922        //  selection manually if it really wanted to.
4923        if (mMovement != null && (isFocused() || isPressed())) {
4924            selStart = getSelectionStart();
4925            selEnd = getSelectionEnd();
4926
4927            if (selStart >= 0) {
4928                if (mHighlightPath == null) mHighlightPath = new Path();
4929
4930                if (selStart == selEnd) {
4931                    if (isCursorVisible() &&
4932                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4933                        if (mHighlightPathBogus) {
4934                            mHighlightPath.reset();
4935                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4936                            updateCursorsPositions();
4937                            mHighlightPathBogus = false;
4938                        }
4939
4940                        // XXX should pass to skin instead of drawing directly
4941                        mHighlightPaint.setColor(cursorcolor);
4942                        if (mCurrentAlpha != 255) {
4943                            mHighlightPaint.setAlpha(
4944                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4945                        }
4946                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4947                        highlight = mHighlightPath;
4948                        drawCursor = mCursorCount > 0;
4949                    }
4950                } else if (textCanBeSelected()) {
4951                    if (mHighlightPathBogus) {
4952                        mHighlightPath.reset();
4953                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4954                        mHighlightPathBogus = false;
4955                    }
4956
4957                    // XXX should pass to skin instead of drawing directly
4958                    mHighlightPaint.setColor(mHighlightColor);
4959                    if (mCurrentAlpha != 255) {
4960                        mHighlightPaint.setAlpha(
4961                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4962                    }
4963                    mHighlightPaint.setStyle(Paint.Style.FILL);
4964
4965                    highlight = mHighlightPath;
4966                }
4967            }
4968        }
4969
4970        /*  Comment out until we decide what to do about animations
4971        boolean isLinearTextOn = false;
4972        if (currentTransformation != null) {
4973            isLinearTextOn = mTextPaint.isLinearTextOn();
4974            Matrix m = currentTransformation.getMatrix();
4975            if (!m.isIdentity()) {
4976                // mTextPaint.setLinearTextOn(true);
4977            }
4978        }
4979        */
4980
4981        final InputMethodState ims = mInputMethodState;
4982        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4983        if (ims != null && ims.mBatchEditNesting == 0) {
4984            InputMethodManager imm = InputMethodManager.peekInstance();
4985            if (imm != null) {
4986                if (imm.isActive(this)) {
4987                    boolean reported = false;
4988                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4989                        // We are in extract mode and the content has changed
4990                        // in some way... just report complete new text to the
4991                        // input method.
4992                        reported = reportExtractedText();
4993                    }
4994                    if (!reported && highlight != null) {
4995                        int candStart = -1;
4996                        int candEnd = -1;
4997                        if (mText instanceof Spannable) {
4998                            Spannable sp = (Spannable)mText;
4999                            candStart = EditableInputConnection.getComposingSpanStart(sp);
5000                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
5001                        }
5002                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
5003                    }
5004                }
5005
5006                if (imm.isWatchingCursor(this) && highlight != null) {
5007                    highlight.computeBounds(ims.mTmpRectF, true);
5008                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
5009
5010                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
5011                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
5012
5013                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
5014
5015                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
5016                            (int)(ims.mTmpRectF.top + 0.5),
5017                            (int)(ims.mTmpRectF.right + 0.5),
5018                            (int)(ims.mTmpRectF.bottom + 0.5));
5019
5020                    imm.updateCursor(this,
5021                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
5022                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
5023                }
5024            }
5025        }
5026
5027        if (mCorrectionHighlighter != null) {
5028            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5029        }
5030
5031        if (drawCursor) {
5032            drawCursor(canvas, cursorOffsetVertical);
5033            // Rely on the drawable entirely, do not draw the cursor line.
5034            // Has to be done after the IMM related code above which relies on the highlight.
5035            highlight = null;
5036        }
5037
5038        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5039
5040        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5041            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5042            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5043        }
5044
5045        /*  Comment out until we decide what to do about animations
5046        if (currentTransformation != null) {
5047            mTextPaint.setLinearTextOn(isLinearTextOn);
5048        }
5049        */
5050
5051        canvas.restore();
5052    }
5053
5054    private void updateCursorsPositions() {
5055        if (mCursorDrawableRes == 0) {
5056            mCursorCount = 0;
5057            return;
5058        }
5059
5060        final int offset = getSelectionStart();
5061        final int line = mLayout.getLineForOffset(offset);
5062        final int top = mLayout.getLineTop(line);
5063        final int bottom = mLayout.getLineTop(line + 1);
5064
5065        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5066
5067        int middle = bottom;
5068        if (mCursorCount == 2) {
5069            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5070            middle = (top + bottom) >> 1;
5071        }
5072
5073        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5074
5075        if (mCursorCount == 2) {
5076            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5077        }
5078    }
5079
5080    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5081        if (mCursorDrawable[cursorIndex] == null)
5082            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5083
5084        if (mTempRect == null) mTempRect = new Rect();
5085
5086        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5087        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5088        horizontal = Math.max(0.5f, horizontal - 0.5f);
5089        final int left = (int) (horizontal) - mTempRect.left;
5090        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5091                bottom + mTempRect.bottom);
5092    }
5093
5094    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5095        final boolean translate = cursorOffsetVertical != 0;
5096        if (translate) canvas.translate(0, cursorOffsetVertical);
5097        for (int i = 0; i < mCursorCount; i++) {
5098            mCursorDrawable[i].draw(canvas);
5099        }
5100        if (translate) canvas.translate(0, -cursorOffsetVertical);
5101    }
5102
5103    @Override
5104    public void getFocusedRect(Rect r) {
5105        if (mLayout == null) {
5106            super.getFocusedRect(r);
5107            return;
5108        }
5109
5110        int selEnd = getSelectionEnd();
5111        if (selEnd < 0) {
5112            super.getFocusedRect(r);
5113            return;
5114        }
5115
5116        int selStart = getSelectionStart();
5117        if (selStart < 0 || selStart >= selEnd) {
5118            int line = mLayout.getLineForOffset(selEnd);
5119            r.top = mLayout.getLineTop(line);
5120            r.bottom = mLayout.getLineBottom(line);
5121            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5122            r.right = r.left + 4;
5123        } else {
5124            int lineStart = mLayout.getLineForOffset(selStart);
5125            int lineEnd = mLayout.getLineForOffset(selEnd);
5126            r.top = mLayout.getLineTop(lineStart);
5127            r.bottom = mLayout.getLineBottom(lineEnd);
5128            if (lineStart == lineEnd) {
5129                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5130                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5131            } else {
5132                // Selection extends across multiple lines -- the focused
5133                // rect covers the entire width.
5134                if (mHighlightPath == null) mHighlightPath = new Path();
5135                if (mHighlightPathBogus) {
5136                    mHighlightPath.reset();
5137                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5138                    mHighlightPathBogus = false;
5139                }
5140                synchronized (sTempRect) {
5141                    mHighlightPath.computeBounds(sTempRect, true);
5142                    r.left = (int)sTempRect.left-1;
5143                    r.right = (int)sTempRect.right+1;
5144                }
5145            }
5146        }
5147
5148        // Adjust for padding and gravity.
5149        int paddingLeft = getCompoundPaddingLeft();
5150        int paddingTop = getExtendedPaddingTop();
5151        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5152            paddingTop += getVerticalOffset(false);
5153        }
5154        r.offset(paddingLeft, paddingTop);
5155    }
5156
5157    /**
5158     * Return the number of lines of text, or 0 if the internal Layout has not
5159     * been built.
5160     */
5161    public int getLineCount() {
5162        return mLayout != null ? mLayout.getLineCount() : 0;
5163    }
5164
5165    /**
5166     * Return the baseline for the specified line (0...getLineCount() - 1)
5167     * If bounds is not null, return the top, left, right, bottom extents
5168     * of the specified line in it. If the internal Layout has not been built,
5169     * return 0 and set bounds to (0, 0, 0, 0)
5170     * @param line which line to examine (0..getLineCount() - 1)
5171     * @param bounds Optional. If not null, it returns the extent of the line
5172     * @return the Y-coordinate of the baseline
5173     */
5174    public int getLineBounds(int line, Rect bounds) {
5175        if (mLayout == null) {
5176            if (bounds != null) {
5177                bounds.set(0, 0, 0, 0);
5178            }
5179            return 0;
5180        }
5181        else {
5182            int baseline = mLayout.getLineBounds(line, bounds);
5183
5184            int voffset = getExtendedPaddingTop();
5185            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5186                voffset += getVerticalOffset(true);
5187            }
5188            if (bounds != null) {
5189                bounds.offset(getCompoundPaddingLeft(), voffset);
5190            }
5191            return baseline + voffset;
5192        }
5193    }
5194
5195    @Override
5196    public int getBaseline() {
5197        if (mLayout == null) {
5198            return super.getBaseline();
5199        }
5200
5201        int voffset = 0;
5202        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5203            voffset = getVerticalOffset(true);
5204        }
5205
5206        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5207    }
5208
5209    /**
5210     * @hide
5211     * @param offsetRequired
5212     */
5213    @Override
5214    protected int getFadeTop(boolean offsetRequired) {
5215        if (mLayout == null) return 0;
5216
5217        int voffset = 0;
5218        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5219            voffset = getVerticalOffset(true);
5220        }
5221
5222        if (offsetRequired) voffset += getTopPaddingOffset();
5223
5224        return getExtendedPaddingTop() + voffset;
5225    }
5226
5227    /**
5228     * @hide
5229     * @param offsetRequired
5230     */
5231    @Override
5232    protected int getFadeHeight(boolean offsetRequired) {
5233        return mLayout != null ? mLayout.getHeight() : 0;
5234    }
5235
5236    @Override
5237    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5238        if (keyCode == KeyEvent.KEYCODE_BACK) {
5239            boolean isInSelectionMode = mSelectionActionMode != null;
5240
5241            if (isInSelectionMode) {
5242                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5243                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5244                    if (state != null) {
5245                        state.startTracking(event, this);
5246                    }
5247                    return true;
5248                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5249                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5250                    if (state != null) {
5251                        state.handleUpEvent(event);
5252                    }
5253                    if (event.isTracking() && !event.isCanceled()) {
5254                        if (isInSelectionMode) {
5255                            stopSelectionActionMode();
5256                            return true;
5257                        }
5258                    }
5259                }
5260            }
5261        }
5262        return super.onKeyPreIme(keyCode, event);
5263    }
5264
5265    @Override
5266    public boolean onKeyDown(int keyCode, KeyEvent event) {
5267        int which = doKeyDown(keyCode, event, null);
5268        if (which == 0) {
5269            // Go through default dispatching.
5270            return super.onKeyDown(keyCode, event);
5271        }
5272
5273        return true;
5274    }
5275
5276    @Override
5277    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5278        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5279
5280        int which = doKeyDown(keyCode, down, event);
5281        if (which == 0) {
5282            // Go through default dispatching.
5283            return super.onKeyMultiple(keyCode, repeatCount, event);
5284        }
5285        if (which == -1) {
5286            // Consumed the whole thing.
5287            return true;
5288        }
5289
5290        repeatCount--;
5291
5292        // We are going to dispatch the remaining events to either the input
5293        // or movement method.  To do this, we will just send a repeated stream
5294        // of down and up events until we have done the complete repeatCount.
5295        // It would be nice if those interfaces had an onKeyMultiple() method,
5296        // but adding that is a more complicated change.
5297        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5298        if (which == 1) {
5299            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5300            while (--repeatCount > 0) {
5301                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5302                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5303            }
5304            hideErrorIfUnchanged();
5305
5306        } else if (which == 2) {
5307            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5308            while (--repeatCount > 0) {
5309                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5310                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5311            }
5312        }
5313
5314        return true;
5315    }
5316
5317    /**
5318     * Returns true if pressing ENTER in this field advances focus instead
5319     * of inserting the character.  This is true mostly in single-line fields,
5320     * but also in mail addresses and subjects which will display on multiple
5321     * lines but where it doesn't make sense to insert newlines.
5322     */
5323    private boolean shouldAdvanceFocusOnEnter() {
5324        if (mInput == null) {
5325            return false;
5326        }
5327
5328        if (mSingleLine) {
5329            return true;
5330        }
5331
5332        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5333            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5334            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5335                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5336                return true;
5337            }
5338        }
5339
5340        return false;
5341    }
5342
5343    /**
5344     * Returns true if pressing TAB in this field advances focus instead
5345     * of inserting the character.  Insert tabs only in multi-line editors.
5346     */
5347    private boolean shouldAdvanceFocusOnTab() {
5348        if (mInput != null && !mSingleLine) {
5349            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5350                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5351                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5352                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5353                    return false;
5354                }
5355            }
5356        }
5357        return true;
5358    }
5359
5360    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5361        if (!isEnabled()) {
5362            return 0;
5363        }
5364
5365        switch (keyCode) {
5366            case KeyEvent.KEYCODE_ENTER:
5367                if (event.hasNoModifiers()) {
5368                    // When mInputContentType is set, we know that we are
5369                    // running in a "modern" cupcake environment, so don't need
5370                    // to worry about the application trying to capture
5371                    // enter key events.
5372                    if (mInputContentType != null) {
5373                        // If there is an action listener, given them a
5374                        // chance to consume the event.
5375                        if (mInputContentType.onEditorActionListener != null &&
5376                                mInputContentType.onEditorActionListener.onEditorAction(
5377                                this, EditorInfo.IME_NULL, event)) {
5378                            mInputContentType.enterDown = true;
5379                            // We are consuming the enter key for them.
5380                            return -1;
5381                        }
5382                    }
5383
5384                    // If our editor should move focus when enter is pressed, or
5385                    // this is a generated event from an IME action button, then
5386                    // don't let it be inserted into the text.
5387                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5388                            || shouldAdvanceFocusOnEnter()) {
5389                        if (hasOnClickListeners()) {
5390                            return 0;
5391                        }
5392                        return -1;
5393                    }
5394                }
5395                break;
5396
5397            case KeyEvent.KEYCODE_DPAD_CENTER:
5398                if (event.hasNoModifiers()) {
5399                    if (shouldAdvanceFocusOnEnter()) {
5400                        return 0;
5401                    }
5402                }
5403                break;
5404
5405            case KeyEvent.KEYCODE_TAB:
5406                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5407                    if (shouldAdvanceFocusOnTab()) {
5408                        return 0;
5409                    }
5410                }
5411                break;
5412
5413                // Has to be done on key down (and not on key up) to correctly be intercepted.
5414            case KeyEvent.KEYCODE_BACK:
5415                if (mSelectionActionMode != null) {
5416                    stopSelectionActionMode();
5417                    return -1;
5418                }
5419                break;
5420        }
5421
5422        if (mInput != null) {
5423            resetErrorChangedFlag();
5424
5425            boolean doDown = true;
5426            if (otherEvent != null) {
5427                try {
5428                    beginBatchEdit();
5429                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5430                    hideErrorIfUnchanged();
5431                    doDown = false;
5432                    if (handled) {
5433                        return -1;
5434                    }
5435                } catch (AbstractMethodError e) {
5436                    // onKeyOther was added after 1.0, so if it isn't
5437                    // implemented we need to try to dispatch as a regular down.
5438                } finally {
5439                    endBatchEdit();
5440                }
5441            }
5442
5443            if (doDown) {
5444                beginBatchEdit();
5445                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5446                endBatchEdit();
5447                hideErrorIfUnchanged();
5448                if (handled) return 1;
5449            }
5450        }
5451
5452        // bug 650865: sometimes we get a key event before a layout.
5453        // don't try to move around if we don't know the layout.
5454
5455        if (mMovement != null && mLayout != null) {
5456            boolean doDown = true;
5457            if (otherEvent != null) {
5458                try {
5459                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5460                            otherEvent);
5461                    doDown = false;
5462                    if (handled) {
5463                        return -1;
5464                    }
5465                } catch (AbstractMethodError e) {
5466                    // onKeyOther was added after 1.0, so if it isn't
5467                    // implemented we need to try to dispatch as a regular down.
5468                }
5469            }
5470            if (doDown) {
5471                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5472                    return 2;
5473            }
5474        }
5475
5476        return 0;
5477    }
5478
5479    /**
5480     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5481     * can be recorded.
5482     * @hide
5483     */
5484    public void resetErrorChangedFlag() {
5485        /*
5486         * Keep track of what the error was before doing the input
5487         * so that if an input filter changed the error, we leave
5488         * that error showing.  Otherwise, we take down whatever
5489         * error was showing when the user types something.
5490         */
5491        mErrorWasChanged = false;
5492    }
5493
5494    /**
5495     * @hide
5496     */
5497    public void hideErrorIfUnchanged() {
5498        if (mError != null && !mErrorWasChanged) {
5499            setError(null, null);
5500        }
5501    }
5502
5503    @Override
5504    public boolean onKeyUp(int keyCode, KeyEvent event) {
5505        if (!isEnabled()) {
5506            return super.onKeyUp(keyCode, event);
5507        }
5508
5509        switch (keyCode) {
5510            case KeyEvent.KEYCODE_DPAD_CENTER:
5511                if (event.hasNoModifiers()) {
5512                    /*
5513                     * If there is a click listener, just call through to
5514                     * super, which will invoke it.
5515                     *
5516                     * If there isn't a click listener, try to show the soft
5517                     * input method.  (It will also
5518                     * call performClick(), but that won't do anything in
5519                     * this case.)
5520                     */
5521                    if (!hasOnClickListeners()) {
5522                        if (mMovement != null && mText instanceof Editable
5523                                && mLayout != null && onCheckIsTextEditor()) {
5524                            InputMethodManager imm = InputMethodManager.peekInstance();
5525                            viewClicked(imm);
5526                            if (imm != null && mSoftInputShownOnFocus) {
5527                                imm.showSoftInput(this, 0);
5528                            }
5529                        }
5530                    }
5531                }
5532                return super.onKeyUp(keyCode, event);
5533
5534            case KeyEvent.KEYCODE_ENTER:
5535                if (event.hasNoModifiers()) {
5536                    if (mInputContentType != null
5537                            && mInputContentType.onEditorActionListener != null
5538                            && mInputContentType.enterDown) {
5539                        mInputContentType.enterDown = false;
5540                        if (mInputContentType.onEditorActionListener.onEditorAction(
5541                                this, EditorInfo.IME_NULL, event)) {
5542                            return true;
5543                        }
5544                    }
5545
5546                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5547                            || shouldAdvanceFocusOnEnter()) {
5548                        /*
5549                         * If there is a click listener, just call through to
5550                         * super, which will invoke it.
5551                         *
5552                         * If there isn't a click listener, try to advance focus,
5553                         * but still call through to super, which will reset the
5554                         * pressed state and longpress state.  (It will also
5555                         * call performClick(), but that won't do anything in
5556                         * this case.)
5557                         */
5558                        if (!hasOnClickListeners()) {
5559                            View v = focusSearch(FOCUS_DOWN);
5560
5561                            if (v != null) {
5562                                if (!v.requestFocus(FOCUS_DOWN)) {
5563                                    throw new IllegalStateException(
5564                                            "focus search returned a view " +
5565                                            "that wasn't able to take focus!");
5566                                }
5567
5568                                /*
5569                                 * Return true because we handled the key; super
5570                                 * will return false because there was no click
5571                                 * listener.
5572                                 */
5573                                super.onKeyUp(keyCode, event);
5574                                return true;
5575                            } else if ((event.getFlags()
5576                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5577                                // No target for next focus, but make sure the IME
5578                                // if this came from it.
5579                                InputMethodManager imm = InputMethodManager.peekInstance();
5580                                if (imm != null && imm.isActive(this)) {
5581                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5582                                }
5583                            }
5584                        }
5585                    }
5586                    return super.onKeyUp(keyCode, event);
5587                }
5588                break;
5589        }
5590
5591        if (mInput != null)
5592            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5593                return true;
5594
5595        if (mMovement != null && mLayout != null)
5596            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5597                return true;
5598
5599        return super.onKeyUp(keyCode, event);
5600    }
5601
5602    @Override public boolean onCheckIsTextEditor() {
5603        return mInputType != EditorInfo.TYPE_NULL;
5604    }
5605
5606    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5607        if (onCheckIsTextEditor() && isEnabled()) {
5608            if (mInputMethodState == null) {
5609                mInputMethodState = new InputMethodState();
5610            }
5611            outAttrs.inputType = mInputType;
5612            if (mInputContentType != null) {
5613                outAttrs.imeOptions = mInputContentType.imeOptions;
5614                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5615                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5616                outAttrs.actionId = mInputContentType.imeActionId;
5617                outAttrs.extras = mInputContentType.extras;
5618            } else {
5619                outAttrs.imeOptions = EditorInfo.IME_NULL;
5620            }
5621            if (focusSearch(FOCUS_DOWN) != null) {
5622                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5623            }
5624            if (focusSearch(FOCUS_UP) != null) {
5625                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5626            }
5627            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5628                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5629                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5630                    // An action has not been set, but the enter key will move to
5631                    // the next focus, so set the action to that.
5632                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5633                } else {
5634                    // An action has not been set, and there is no focus to move
5635                    // to, so let's just supply a "done" action.
5636                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5637                }
5638                if (!shouldAdvanceFocusOnEnter()) {
5639                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5640                }
5641            }
5642            if (isMultilineInputType(outAttrs.inputType)) {
5643                // Multi-line text editors should always show an enter key.
5644                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5645            }
5646            outAttrs.hintText = mHint;
5647            if (mText instanceof Editable) {
5648                InputConnection ic = new EditableInputConnection(this);
5649                outAttrs.initialSelStart = getSelectionStart();
5650                outAttrs.initialSelEnd = getSelectionEnd();
5651                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5652                return ic;
5653            }
5654        }
5655        return null;
5656    }
5657
5658    /**
5659     * If this TextView contains editable content, extract a portion of it
5660     * based on the information in <var>request</var> in to <var>outText</var>.
5661     * @return Returns true if the text was successfully extracted, else false.
5662     */
5663    public boolean extractText(ExtractedTextRequest request,
5664            ExtractedText outText) {
5665        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5666                EXTRACT_UNKNOWN, outText);
5667    }
5668
5669    static final int EXTRACT_NOTHING = -2;
5670    static final int EXTRACT_UNKNOWN = -1;
5671
5672    boolean extractTextInternal(ExtractedTextRequest request,
5673            int partialStartOffset, int partialEndOffset, int delta,
5674            ExtractedText outText) {
5675        final CharSequence content = mText;
5676        if (content != null) {
5677            if (partialStartOffset != EXTRACT_NOTHING) {
5678                final int N = content.length();
5679                if (partialStartOffset < 0) {
5680                    outText.partialStartOffset = outText.partialEndOffset = -1;
5681                    partialStartOffset = 0;
5682                    partialEndOffset = N;
5683                } else {
5684                    // Now use the delta to determine the actual amount of text
5685                    // we need.
5686                    partialEndOffset += delta;
5687                    // Adjust offsets to ensure we contain full spans.
5688                    if (content instanceof Spanned) {
5689                        Spanned spanned = (Spanned)content;
5690                        Object[] spans = spanned.getSpans(partialStartOffset,
5691                                partialEndOffset, ParcelableSpan.class);
5692                        int i = spans.length;
5693                        while (i > 0) {
5694                            i--;
5695                            int j = spanned.getSpanStart(spans[i]);
5696                            if (j < partialStartOffset) partialStartOffset = j;
5697                            j = spanned.getSpanEnd(spans[i]);
5698                            if (j > partialEndOffset) partialEndOffset = j;
5699                        }
5700                    }
5701                    outText.partialStartOffset = partialStartOffset;
5702                    outText.partialEndOffset = partialEndOffset - delta;
5703
5704                    if (partialStartOffset > N) {
5705                        partialStartOffset = N;
5706                    } else if (partialStartOffset < 0) {
5707                        partialStartOffset = 0;
5708                    }
5709                    if (partialEndOffset > N) {
5710                        partialEndOffset = N;
5711                    } else if (partialEndOffset < 0) {
5712                        partialEndOffset = 0;
5713                    }
5714                }
5715                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5716                    outText.text = content.subSequence(partialStartOffset,
5717                            partialEndOffset);
5718                } else {
5719                    outText.text = TextUtils.substring(content, partialStartOffset,
5720                            partialEndOffset);
5721                }
5722            } else {
5723                outText.partialStartOffset = 0;
5724                outText.partialEndOffset = 0;
5725                outText.text = "";
5726            }
5727            outText.flags = 0;
5728            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5729                outText.flags |= ExtractedText.FLAG_SELECTING;
5730            }
5731            if (mSingleLine) {
5732                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5733            }
5734            outText.startOffset = 0;
5735            outText.selectionStart = getSelectionStart();
5736            outText.selectionEnd = getSelectionEnd();
5737            return true;
5738        }
5739        return false;
5740    }
5741
5742    boolean reportExtractedText() {
5743        final InputMethodState ims = mInputMethodState;
5744        if (ims != null) {
5745            final boolean contentChanged = ims.mContentChanged;
5746            if (contentChanged || ims.mSelectionModeChanged) {
5747                ims.mContentChanged = false;
5748                ims.mSelectionModeChanged = false;
5749                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5750                if (req != null) {
5751                    InputMethodManager imm = InputMethodManager.peekInstance();
5752                    if (imm != null) {
5753                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5754                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5755                                + " delta=" + ims.mChangedDelta);
5756                        if (ims.mChangedStart < 0 && !contentChanged) {
5757                            ims.mChangedStart = EXTRACT_NOTHING;
5758                        }
5759                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5760                                ims.mChangedDelta, ims.mTmpExtracted)) {
5761                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5762                                    + ims.mTmpExtracted.partialStartOffset
5763                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5764                                    + ": " + ims.mTmpExtracted.text);
5765                            imm.updateExtractedText(this, req.token,
5766                                    mInputMethodState.mTmpExtracted);
5767                            ims.mChangedStart = EXTRACT_UNKNOWN;
5768                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5769                            ims.mChangedDelta = 0;
5770                            ims.mContentChanged = false;
5771                            return true;
5772                        }
5773                    }
5774                }
5775            }
5776        }
5777        return false;
5778    }
5779
5780    /**
5781     * This is used to remove all style-impacting spans from text before new
5782     * extracted text is being replaced into it, so that we don't have any
5783     * lingering spans applied during the replace.
5784     */
5785    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5786        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5787        int i = spans.length;
5788        while (i > 0) {
5789            i--;
5790            spannable.removeSpan(spans[i]);
5791        }
5792    }
5793
5794    /**
5795     * Apply to this text view the given extracted text, as previously
5796     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5797     */
5798    public void setExtractedText(ExtractedText text) {
5799        Editable content = getEditableText();
5800        if (text.text != null) {
5801            if (content == null) {
5802                setText(text.text, TextView.BufferType.EDITABLE);
5803            } else if (text.partialStartOffset < 0) {
5804                removeParcelableSpans(content, 0, content.length());
5805                content.replace(0, content.length(), text.text);
5806            } else {
5807                final int N = content.length();
5808                int start = text.partialStartOffset;
5809                if (start > N) start = N;
5810                int end = text.partialEndOffset;
5811                if (end > N) end = N;
5812                removeParcelableSpans(content, start, end);
5813                content.replace(start, end, text.text);
5814            }
5815        }
5816
5817        // Now set the selection position...  make sure it is in range, to
5818        // avoid crashes.  If this is a partial update, it is possible that
5819        // the underlying text may have changed, causing us problems here.
5820        // Also we just don't want to trust clients to do the right thing.
5821        Spannable sp = (Spannable)getText();
5822        final int N = sp.length();
5823        int start = text.selectionStart;
5824        if (start < 0) start = 0;
5825        else if (start > N) start = N;
5826        int end = text.selectionEnd;
5827        if (end < 0) end = 0;
5828        else if (end > N) end = N;
5829        Selection.setSelection(sp, start, end);
5830
5831        // Finally, update the selection mode.
5832        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5833            MetaKeyKeyListener.startSelecting(this, sp);
5834        } else {
5835            MetaKeyKeyListener.stopSelecting(this, sp);
5836        }
5837    }
5838
5839    /**
5840     * @hide
5841     */
5842    public void setExtracting(ExtractedTextRequest req) {
5843        if (mInputMethodState != null) {
5844            mInputMethodState.mExtracting = req;
5845        }
5846        // This would stop a possible selection mode, but no such mode is started in case
5847        // extracted mode will start. Some text is selected though, and will trigger an action mode
5848        // in the extracted view.
5849        hideControllers();
5850    }
5851
5852    /**
5853     * Called by the framework in response to a text completion from
5854     * the current input method, provided by it calling
5855     * {@link InputConnection#commitCompletion
5856     * InputConnection.commitCompletion()}.  The default implementation does
5857     * nothing; text views that are supporting auto-completion should override
5858     * this to do their desired behavior.
5859     *
5860     * @param text The auto complete text the user has selected.
5861     */
5862    public void onCommitCompletion(CompletionInfo text) {
5863        // intentionally empty
5864    }
5865
5866    /**
5867     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5868     * a dictionnary) from the current input method, provided by it calling
5869     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5870     * implementation flashes the background of the corrected word to provide feedback to the user.
5871     *
5872     * @param info The auto correct info about the text that was corrected.
5873     */
5874    public void onCommitCorrection(CorrectionInfo info) {
5875        if (mCorrectionHighlighter == null) {
5876            mCorrectionHighlighter = new CorrectionHighlighter();
5877        } else {
5878            mCorrectionHighlighter.invalidate(false);
5879        }
5880
5881        mCorrectionHighlighter.highlight(info);
5882    }
5883
5884    private class CorrectionHighlighter {
5885        private final Path mPath = new Path();
5886        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5887        private int mStart, mEnd;
5888        private long mFadingStartTime;
5889        private final static int FADE_OUT_DURATION = 400;
5890
5891        public CorrectionHighlighter() {
5892            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5893            mPaint.setStyle(Paint.Style.FILL);
5894        }
5895
5896        public void highlight(CorrectionInfo info) {
5897            mStart = info.getOffset();
5898            mEnd = mStart + info.getNewText().length();
5899            mFadingStartTime = SystemClock.uptimeMillis();
5900
5901            if (mStart < 0 || mEnd < 0) {
5902                stopAnimation();
5903            }
5904        }
5905
5906        public void draw(Canvas canvas, int cursorOffsetVertical) {
5907            if (updatePath() && updatePaint()) {
5908                if (cursorOffsetVertical != 0) {
5909                    canvas.translate(0, cursorOffsetVertical);
5910                }
5911
5912                canvas.drawPath(mPath, mPaint);
5913
5914                if (cursorOffsetVertical != 0) {
5915                    canvas.translate(0, -cursorOffsetVertical);
5916                }
5917                invalidate(true); // TODO invalidate cursor region only
5918            } else {
5919                stopAnimation();
5920                invalidate(false); // TODO invalidate cursor region only
5921            }
5922        }
5923
5924        private boolean updatePaint() {
5925            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5926            if (duration > FADE_OUT_DURATION) return false;
5927
5928            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5929            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5930            final int color = (mHighlightColor & 0x00FFFFFF) +
5931                    ((int) (highlightColorAlpha * coef) << 24);
5932            mPaint.setColor(color);
5933            return true;
5934        }
5935
5936        private boolean updatePath() {
5937            final Layout layout = TextView.this.mLayout;
5938            if (layout == null) return false;
5939
5940            // Update in case text is edited while the animation is run
5941            final int length = mText.length();
5942            int start = Math.min(length, mStart);
5943            int end = Math.min(length, mEnd);
5944
5945            mPath.reset();
5946            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5947            return true;
5948        }
5949
5950        private void invalidate(boolean delayed) {
5951            if (TextView.this.mLayout == null) return;
5952
5953            synchronized (sTempRect) {
5954                mPath.computeBounds(sTempRect, false);
5955
5956                int left = getCompoundPaddingLeft();
5957                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5958
5959                if (delayed) {
5960                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5961                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5962                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5963                } else {
5964                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5965                            (int) sTempRect.right, (int) sTempRect.bottom);
5966                }
5967            }
5968        }
5969
5970        private void stopAnimation() {
5971            TextView.this.mCorrectionHighlighter = null;
5972        }
5973    }
5974
5975    public void beginBatchEdit() {
5976        mInBatchEditControllers = true;
5977        final InputMethodState ims = mInputMethodState;
5978        if (ims != null) {
5979            int nesting = ++ims.mBatchEditNesting;
5980            if (nesting == 1) {
5981                ims.mCursorChanged = false;
5982                ims.mChangedDelta = 0;
5983                if (ims.mContentChanged) {
5984                    // We already have a pending change from somewhere else,
5985                    // so turn this into a full update.
5986                    ims.mChangedStart = 0;
5987                    ims.mChangedEnd = mText.length();
5988                } else {
5989                    ims.mChangedStart = EXTRACT_UNKNOWN;
5990                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5991                    ims.mContentChanged = false;
5992                }
5993                onBeginBatchEdit();
5994            }
5995        }
5996    }
5997
5998    public void endBatchEdit() {
5999        mInBatchEditControllers = false;
6000        final InputMethodState ims = mInputMethodState;
6001        if (ims != null) {
6002            int nesting = --ims.mBatchEditNesting;
6003            if (nesting == 0) {
6004                finishBatchEdit(ims);
6005            }
6006        }
6007    }
6008
6009    void ensureEndedBatchEdit() {
6010        final InputMethodState ims = mInputMethodState;
6011        if (ims != null && ims.mBatchEditNesting != 0) {
6012            ims.mBatchEditNesting = 0;
6013            finishBatchEdit(ims);
6014        }
6015    }
6016
6017    void finishBatchEdit(final InputMethodState ims) {
6018        onEndBatchEdit();
6019
6020        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6021            updateAfterEdit();
6022            reportExtractedText();
6023        } else if (ims.mCursorChanged) {
6024            // Cheezy way to get us to report the current cursor location.
6025            invalidateCursor();
6026        }
6027    }
6028
6029    void updateAfterEdit() {
6030        invalidate();
6031        int curs = getSelectionStart();
6032
6033        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6034            registerForPreDraw();
6035        }
6036
6037        if (curs >= 0) {
6038            mHighlightPathBogus = true;
6039            makeBlink();
6040            bringPointIntoView(curs);
6041        }
6042
6043        checkForResize();
6044    }
6045
6046    /**
6047     * Called by the framework in response to a request to begin a batch
6048     * of edit operations through a call to link {@link #beginBatchEdit()}.
6049     */
6050    public void onBeginBatchEdit() {
6051        // intentionally empty
6052    }
6053
6054    /**
6055     * Called by the framework in response to a request to end a batch
6056     * of edit operations through a call to link {@link #endBatchEdit}.
6057     */
6058    public void onEndBatchEdit() {
6059        // intentionally empty
6060    }
6061
6062    /**
6063     * Called by the framework in response to a private command from the
6064     * current method, provided by it calling
6065     * {@link InputConnection#performPrivateCommand
6066     * InputConnection.performPrivateCommand()}.
6067     *
6068     * @param action The action name of the command.
6069     * @param data Any additional data for the command.  This may be null.
6070     * @return Return true if you handled the command, else false.
6071     */
6072    public boolean onPrivateIMECommand(String action, Bundle data) {
6073        return false;
6074    }
6075
6076    private void nullLayouts() {
6077        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6078            mSavedLayout = (BoringLayout) mLayout;
6079        }
6080        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6081            mSavedHintLayout = (BoringLayout) mHintLayout;
6082        }
6083
6084        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6085
6086        // Since it depends on the value of mLayout
6087        prepareCursorControllers();
6088    }
6089
6090    /**
6091     * Make a new Layout based on the already-measured size of the view,
6092     * on the assumption that it was measured correctly at some point.
6093     */
6094    private void assumeLayout() {
6095        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6096
6097        if (width < 1) {
6098            width = 0;
6099        }
6100
6101        int physicalWidth = width;
6102
6103        if (mHorizontallyScrolling) {
6104            width = VERY_WIDE;
6105        }
6106
6107        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6108                      physicalWidth, false);
6109    }
6110
6111    @Override
6112    protected void resetResolvedLayoutDirection() {
6113        super.resetResolvedLayoutDirection();
6114
6115        if (mLayoutAlignment != null &&
6116                (mTextAlign == TextAlign.VIEW_START ||
6117                mTextAlign == TextAlign.VIEW_END)) {
6118            mLayoutAlignment = null;
6119        }
6120    }
6121
6122    private Layout.Alignment getLayoutAlignment() {
6123        if (mLayoutAlignment == null) {
6124            Layout.Alignment alignment;
6125            TextAlign textAlign = mTextAlign;
6126            switch (textAlign) {
6127                case INHERIT:
6128                    // fall through to gravity temporarily
6129                    // intention is to inherit value through view hierarchy.
6130                case GRAVITY:
6131                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6132                        case Gravity.START:
6133                            alignment = Layout.Alignment.ALIGN_NORMAL;
6134                            break;
6135                        case Gravity.END:
6136                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6137                            break;
6138                        case Gravity.LEFT:
6139                            alignment = Layout.Alignment.ALIGN_LEFT;
6140                            break;
6141                        case Gravity.RIGHT:
6142                            alignment = Layout.Alignment.ALIGN_RIGHT;
6143                            break;
6144                        case Gravity.CENTER_HORIZONTAL:
6145                            alignment = Layout.Alignment.ALIGN_CENTER;
6146                            break;
6147                        default:
6148                            alignment = Layout.Alignment.ALIGN_NORMAL;
6149                            break;
6150                    }
6151                    break;
6152                case TEXT_START:
6153                    alignment = Layout.Alignment.ALIGN_NORMAL;
6154                    break;
6155                case TEXT_END:
6156                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6157                    break;
6158                case CENTER:
6159                    alignment = Layout.Alignment.ALIGN_CENTER;
6160                    break;
6161                case VIEW_START:
6162                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6163                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6164                    break;
6165                case VIEW_END:
6166                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6167                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6168                    break;
6169                default:
6170                    alignment = Layout.Alignment.ALIGN_NORMAL;
6171                    break;
6172            }
6173            mLayoutAlignment = alignment;
6174        }
6175        return mLayoutAlignment;
6176    }
6177
6178    /**
6179     * The width passed in is now the desired layout width,
6180     * not the full view width with padding.
6181     * {@hide}
6182     */
6183    protected void makeNewLayout(int wantWidth, int hintWidth,
6184                                 BoringLayout.Metrics boring,
6185                                 BoringLayout.Metrics hintBoring,
6186                                 int ellipsisWidth, boolean bringIntoView) {
6187        stopMarquee();
6188
6189        // Update "old" cached values
6190        mOldMaximum = mMaximum;
6191        mOldMaxMode = mMaxMode;
6192
6193        mHighlightPathBogus = true;
6194
6195        if (wantWidth < 0) {
6196            wantWidth = 0;
6197        }
6198        if (hintWidth < 0) {
6199            hintWidth = 0;
6200        }
6201
6202        Layout.Alignment alignment = getLayoutAlignment();
6203        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6204        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6205                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6206        TruncateAt effectiveEllipsize = mEllipsize;
6207        if (mEllipsize == TruncateAt.MARQUEE &&
6208                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6209            effectiveEllipsize = TruncateAt.END_SMALL;
6210        }
6211
6212        if (mTextDir == null) {
6213            resolveTextDirection();
6214        }
6215
6216        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6217                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6218        if (switchEllipsize) {
6219            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6220                    TruncateAt.END : TruncateAt.MARQUEE;
6221            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6222                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6223        }
6224
6225        shouldEllipsize = mEllipsize != null;
6226        mHintLayout = null;
6227
6228        if (mHint != null) {
6229            if (shouldEllipsize) hintWidth = wantWidth;
6230
6231            if (hintBoring == UNKNOWN_BORING) {
6232                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6233                                                   mHintBoring);
6234                if (hintBoring != null) {
6235                    mHintBoring = hintBoring;
6236                }
6237            }
6238
6239            if (hintBoring != null) {
6240                if (hintBoring.width <= hintWidth &&
6241                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6242                    if (mSavedHintLayout != null) {
6243                        mHintLayout = mSavedHintLayout.
6244                                replaceOrMake(mHint, mTextPaint,
6245                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6246                                hintBoring, mIncludePad);
6247                    } else {
6248                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6249                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6250                                hintBoring, mIncludePad);
6251                    }
6252
6253                    mSavedHintLayout = (BoringLayout) mHintLayout;
6254                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6255                    if (mSavedHintLayout != null) {
6256                        mHintLayout = mSavedHintLayout.
6257                                replaceOrMake(mHint, mTextPaint,
6258                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6259                                hintBoring, mIncludePad, mEllipsize,
6260                                ellipsisWidth);
6261                    } else {
6262                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6263                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6264                                hintBoring, mIncludePad, mEllipsize,
6265                                ellipsisWidth);
6266                    }
6267                } else if (shouldEllipsize) {
6268                    mHintLayout = new StaticLayout(mHint,
6269                                0, mHint.length(),
6270                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6271                                mSpacingAdd, mIncludePad, mEllipsize,
6272                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6273                } else {
6274                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6275                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6276                            mIncludePad);
6277                }
6278            } else if (shouldEllipsize) {
6279                mHintLayout = new StaticLayout(mHint,
6280                            0, mHint.length(),
6281                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6282                            mSpacingAdd, mIncludePad, mEllipsize,
6283                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6284            } else {
6285                mHintLayout = new StaticLayout(mHint, mTextPaint,
6286                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6287                        mIncludePad);
6288            }
6289        }
6290
6291        if (bringIntoView) {
6292            registerForPreDraw();
6293        }
6294
6295        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6296            if (!compressText(ellipsisWidth)) {
6297                final int height = mLayoutParams.height;
6298                // If the size of the view does not depend on the size of the text, try to
6299                // start the marquee immediately
6300                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6301                    startMarquee();
6302                } else {
6303                    // Defer the start of the marquee until we know our width (see setFrame())
6304                    mRestartMarquee = true;
6305                }
6306            }
6307        }
6308
6309        // CursorControllers need a non-null mLayout
6310        prepareCursorControllers();
6311    }
6312
6313    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6314            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6315            boolean useSaved) {
6316        Layout result = null;
6317        if (mText instanceof Spannable) {
6318            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6319                    alignment, mTextDir, mSpacingMult,
6320                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6321                            ellipsisWidth);
6322        } else {
6323            if (boring == UNKNOWN_BORING) {
6324                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6325                if (boring != null) {
6326                    mBoring = boring;
6327                }
6328            }
6329
6330            if (boring != null) {
6331                if (boring.width <= wantWidth &&
6332                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6333                    if (useSaved && mSavedLayout != null) {
6334                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6335                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6336                                boring, mIncludePad);
6337                    } else {
6338                        result = BoringLayout.make(mTransformed, mTextPaint,
6339                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6340                                boring, mIncludePad);
6341                    }
6342
6343                    if (useSaved) {
6344                        mSavedLayout = (BoringLayout) result;
6345                    }
6346                } else if (shouldEllipsize && boring.width <= wantWidth) {
6347                    if (useSaved && mSavedLayout != null) {
6348                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6349                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6350                                boring, mIncludePad, effectiveEllipsize,
6351                                ellipsisWidth);
6352                    } else {
6353                        result = BoringLayout.make(mTransformed, mTextPaint,
6354                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6355                                boring, mIncludePad, effectiveEllipsize,
6356                                ellipsisWidth);
6357                    }
6358                } else if (shouldEllipsize) {
6359                    result = new StaticLayout(mTransformed,
6360                            0, mTransformed.length(),
6361                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6362                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6363                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6364                } else {
6365                    result = new StaticLayout(mTransformed, mTextPaint,
6366                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6367                            mIncludePad);
6368                }
6369            } else if (shouldEllipsize) {
6370                result = new StaticLayout(mTransformed,
6371                        0, mTransformed.length(),
6372                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6373                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6374                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6375            } else {
6376                result = new StaticLayout(mTransformed, mTextPaint,
6377                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6378                        mIncludePad);
6379            }
6380        }
6381        return result;
6382    }
6383
6384    private boolean compressText(float width) {
6385        if (isHardwareAccelerated()) return false;
6386
6387        // Only compress the text if it hasn't been compressed by the previous pass
6388        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6389                mTextPaint.getTextScaleX() == 1.0f) {
6390            final float textWidth = mLayout.getLineWidth(0);
6391            final float overflow = (textWidth + 1.0f - width) / width;
6392            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6393                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6394                post(new Runnable() {
6395                    public void run() {
6396                        requestLayout();
6397                    }
6398                });
6399                return true;
6400            }
6401        }
6402
6403        return false;
6404    }
6405
6406    private static int desired(Layout layout) {
6407        int n = layout.getLineCount();
6408        CharSequence text = layout.getText();
6409        float max = 0;
6410
6411        // if any line was wrapped, we can't use it.
6412        // but it's ok for the last line not to have a newline
6413
6414        for (int i = 0; i < n - 1; i++) {
6415            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6416                return -1;
6417        }
6418
6419        for (int i = 0; i < n; i++) {
6420            max = Math.max(max, layout.getLineWidth(i));
6421        }
6422
6423        return (int) FloatMath.ceil(max);
6424    }
6425
6426    /**
6427     * Set whether the TextView includes extra top and bottom padding to make
6428     * room for accents that go above the normal ascent and descent.
6429     * The default is true.
6430     *
6431     * @attr ref android.R.styleable#TextView_includeFontPadding
6432     */
6433    public void setIncludeFontPadding(boolean includepad) {
6434        if (mIncludePad != includepad) {
6435            mIncludePad = includepad;
6436
6437            if (mLayout != null) {
6438                nullLayouts();
6439                requestLayout();
6440                invalidate();
6441            }
6442        }
6443    }
6444
6445    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6446
6447    @Override
6448    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6449        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6450        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6451        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6452        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6453
6454        int width;
6455        int height;
6456
6457        BoringLayout.Metrics boring = UNKNOWN_BORING;
6458        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6459
6460        if (mTextDir == null) {
6461            resolveTextDirection();
6462        }
6463
6464        int des = -1;
6465        boolean fromexisting = false;
6466
6467        if (widthMode == MeasureSpec.EXACTLY) {
6468            // Parent has told us how big to be. So be it.
6469            width = widthSize;
6470        } else {
6471            if (mLayout != null && mEllipsize == null) {
6472                des = desired(mLayout);
6473            }
6474
6475            if (des < 0) {
6476                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6477                if (boring != null) {
6478                    mBoring = boring;
6479                }
6480            } else {
6481                fromexisting = true;
6482            }
6483
6484            if (boring == null || boring == UNKNOWN_BORING) {
6485                if (des < 0) {
6486                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6487                }
6488
6489                width = des;
6490            } else {
6491                width = boring.width;
6492            }
6493
6494            final Drawables dr = mDrawables;
6495            if (dr != null) {
6496                width = Math.max(width, dr.mDrawableWidthTop);
6497                width = Math.max(width, dr.mDrawableWidthBottom);
6498            }
6499
6500            if (mHint != null) {
6501                int hintDes = -1;
6502                int hintWidth;
6503
6504                if (mHintLayout != null && mEllipsize == null) {
6505                    hintDes = desired(mHintLayout);
6506                }
6507
6508                if (hintDes < 0) {
6509                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6510                    if (hintBoring != null) {
6511                        mHintBoring = hintBoring;
6512                    }
6513                }
6514
6515                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6516                    if (hintDes < 0) {
6517                        hintDes = (int) FloatMath.ceil(
6518                                Layout.getDesiredWidth(mHint, mTextPaint));
6519                    }
6520
6521                    hintWidth = hintDes;
6522                } else {
6523                    hintWidth = hintBoring.width;
6524                }
6525
6526                if (hintWidth > width) {
6527                    width = hintWidth;
6528                }
6529            }
6530
6531            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6532
6533            if (mMaxWidthMode == EMS) {
6534                width = Math.min(width, mMaxWidth * getLineHeight());
6535            } else {
6536                width = Math.min(width, mMaxWidth);
6537            }
6538
6539            if (mMinWidthMode == EMS) {
6540                width = Math.max(width, mMinWidth * getLineHeight());
6541            } else {
6542                width = Math.max(width, mMinWidth);
6543            }
6544
6545            // Check against our minimum width
6546            width = Math.max(width, getSuggestedMinimumWidth());
6547
6548            if (widthMode == MeasureSpec.AT_MOST) {
6549                width = Math.min(widthSize, width);
6550            }
6551        }
6552
6553        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6554        int unpaddedWidth = want;
6555
6556        if (mHorizontallyScrolling) want = VERY_WIDE;
6557
6558        int hintWant = want;
6559        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6560
6561        if (mLayout == null) {
6562            makeNewLayout(want, hintWant, boring, hintBoring,
6563                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6564        } else {
6565            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6566                    (hintWidth != hintWant) ||
6567                    (mLayout.getEllipsizedWidth() !=
6568                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6569
6570            final boolean widthChanged = (mHint == null) &&
6571                    (mEllipsize == null) &&
6572                    (want > mLayout.getWidth()) &&
6573                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6574
6575            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6576
6577            if (layoutChanged || maximumChanged) {
6578                if (!maximumChanged && widthChanged) {
6579                    mLayout.increaseWidthTo(want);
6580                } else {
6581                    makeNewLayout(want, hintWant, boring, hintBoring,
6582                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6583                }
6584            } else {
6585                // Nothing has changed
6586            }
6587        }
6588
6589        if (heightMode == MeasureSpec.EXACTLY) {
6590            // Parent has told us how big to be. So be it.
6591            height = heightSize;
6592            mDesiredHeightAtMeasure = -1;
6593        } else {
6594            int desired = getDesiredHeight();
6595
6596            height = desired;
6597            mDesiredHeightAtMeasure = desired;
6598
6599            if (heightMode == MeasureSpec.AT_MOST) {
6600                height = Math.min(desired, heightSize);
6601            }
6602        }
6603
6604        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6605        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6606            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6607        }
6608
6609        /*
6610         * We didn't let makeNewLayout() register to bring the cursor into view,
6611         * so do it here if there is any possibility that it is needed.
6612         */
6613        if (mMovement != null ||
6614            mLayout.getWidth() > unpaddedWidth ||
6615            mLayout.getHeight() > unpaddedHeight) {
6616            registerForPreDraw();
6617        } else {
6618            scrollTo(0, 0);
6619        }
6620
6621        setMeasuredDimension(width, height);
6622    }
6623
6624    private int getDesiredHeight() {
6625        return Math.max(
6626                getDesiredHeight(mLayout, true),
6627                getDesiredHeight(mHintLayout, mEllipsize != null));
6628    }
6629
6630    private int getDesiredHeight(Layout layout, boolean cap) {
6631        if (layout == null) {
6632            return 0;
6633        }
6634
6635        int linecount = layout.getLineCount();
6636        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6637        int desired = layout.getLineTop(linecount);
6638
6639        final Drawables dr = mDrawables;
6640        if (dr != null) {
6641            desired = Math.max(desired, dr.mDrawableHeightLeft);
6642            desired = Math.max(desired, dr.mDrawableHeightRight);
6643        }
6644
6645        desired += pad;
6646
6647        if (mMaxMode == LINES) {
6648            /*
6649             * Don't cap the hint to a certain number of lines.
6650             * (Do cap it, though, if we have a maximum pixel height.)
6651             */
6652            if (cap) {
6653                if (linecount > mMaximum) {
6654                    desired = layout.getLineTop(mMaximum);
6655
6656                    if (dr != null) {
6657                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6658                        desired = Math.max(desired, dr.mDrawableHeightRight);
6659                    }
6660
6661                    desired += pad;
6662                    linecount = mMaximum;
6663                }
6664            }
6665        } else {
6666            desired = Math.min(desired, mMaximum);
6667        }
6668
6669        if (mMinMode == LINES) {
6670            if (linecount < mMinimum) {
6671                desired += getLineHeight() * (mMinimum - linecount);
6672            }
6673        } else {
6674            desired = Math.max(desired, mMinimum);
6675        }
6676
6677        // Check against our minimum height
6678        desired = Math.max(desired, getSuggestedMinimumHeight());
6679
6680        return desired;
6681    }
6682
6683    /**
6684     * Check whether a change to the existing text layout requires a
6685     * new view layout.
6686     */
6687    private void checkForResize() {
6688        boolean sizeChanged = false;
6689
6690        if (mLayout != null) {
6691            // Check if our width changed
6692            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6693                sizeChanged = true;
6694                invalidate();
6695            }
6696
6697            // Check if our height changed
6698            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6699                int desiredHeight = getDesiredHeight();
6700
6701                if (desiredHeight != this.getHeight()) {
6702                    sizeChanged = true;
6703                }
6704            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6705                if (mDesiredHeightAtMeasure >= 0) {
6706                    int desiredHeight = getDesiredHeight();
6707
6708                    if (desiredHeight != mDesiredHeightAtMeasure) {
6709                        sizeChanged = true;
6710                    }
6711                }
6712            }
6713        }
6714
6715        if (sizeChanged) {
6716            requestLayout();
6717            // caller will have already invalidated
6718        }
6719    }
6720
6721    /**
6722     * Check whether entirely new text requires a new view layout
6723     * or merely a new text layout.
6724     */
6725    private void checkForRelayout() {
6726        // If we have a fixed width, we can just swap in a new text layout
6727        // if the text height stays the same or if the view height is fixed.
6728
6729        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6730                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6731                (mHint == null || mHintLayout != null) &&
6732                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6733            // Static width, so try making a new text layout.
6734
6735            int oldht = mLayout.getHeight();
6736            int want = mLayout.getWidth();
6737            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6738
6739            /*
6740             * No need to bring the text into view, since the size is not
6741             * changing (unless we do the requestLayout(), in which case it
6742             * will happen at measure).
6743             */
6744            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6745                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6746                          false);
6747
6748            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6749                // In a fixed-height view, so use our new text layout.
6750                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6751                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6752                    invalidate();
6753                    return;
6754                }
6755
6756                // Dynamic height, but height has stayed the same,
6757                // so use our new text layout.
6758                if (mLayout.getHeight() == oldht &&
6759                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6760                    invalidate();
6761                    return;
6762                }
6763            }
6764
6765            // We lose: the height has changed and we have a dynamic height.
6766            // Request a new view layout using our new text layout.
6767            requestLayout();
6768            invalidate();
6769        } else {
6770            // Dynamic width, so we have no choice but to request a new
6771            // view layout with a new text layout.
6772            nullLayouts();
6773            requestLayout();
6774            invalidate();
6775        }
6776    }
6777
6778    /**
6779     * Returns true if anything changed.
6780     */
6781    private boolean bringTextIntoView() {
6782        int line = 0;
6783        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6784            line = mLayout.getLineCount() - 1;
6785        }
6786
6787        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6788        int dir = mLayout.getParagraphDirection(line);
6789        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6790        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6791        int ht = mLayout.getHeight();
6792
6793        int scrollx, scrolly;
6794
6795        // Convert to left, center, or right alignment.
6796        if (a == Layout.Alignment.ALIGN_NORMAL) {
6797            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6798                Layout.Alignment.ALIGN_RIGHT;
6799        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6800            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6801                Layout.Alignment.ALIGN_LEFT;
6802        }
6803
6804        if (a == Layout.Alignment.ALIGN_CENTER) {
6805            /*
6806             * Keep centered if possible, or, if it is too wide to fit,
6807             * keep leading edge in view.
6808             */
6809
6810            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6811            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6812
6813            if (right - left < hspace) {
6814                scrollx = (right + left) / 2 - hspace / 2;
6815            } else {
6816                if (dir < 0) {
6817                    scrollx = right - hspace;
6818                } else {
6819                    scrollx = left;
6820                }
6821            }
6822        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6823            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6824            scrollx = right - hspace;
6825        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6826            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6827        }
6828
6829        if (ht < vspace) {
6830            scrolly = 0;
6831        } else {
6832            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6833                scrolly = ht - vspace;
6834            } else {
6835                scrolly = 0;
6836            }
6837        }
6838
6839        if (scrollx != mScrollX || scrolly != mScrollY) {
6840            scrollTo(scrollx, scrolly);
6841            return true;
6842        } else {
6843            return false;
6844        }
6845    }
6846
6847    /**
6848     * Move the point, specified by the offset, into the view if it is needed.
6849     * This has to be called after layout. Returns true if anything changed.
6850     */
6851    public boolean bringPointIntoView(int offset) {
6852        boolean changed = false;
6853
6854        if (mLayout == null) return changed;
6855
6856        int line = mLayout.getLineForOffset(offset);
6857
6858        // FIXME: Is it okay to truncate this, or should we round?
6859        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6860        final int top = mLayout.getLineTop(line);
6861        final int bottom = mLayout.getLineTop(line + 1);
6862
6863        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6864        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6865        int ht = mLayout.getHeight();
6866
6867        int grav;
6868
6869        switch (mLayout.getParagraphAlignment(line)) {
6870            case ALIGN_LEFT:
6871                grav = 1;
6872                break;
6873            case ALIGN_RIGHT:
6874                grav = -1;
6875                break;
6876            case ALIGN_NORMAL:
6877                grav = mLayout.getParagraphDirection(line);
6878                break;
6879            case ALIGN_OPPOSITE:
6880                grav = -mLayout.getParagraphDirection(line);
6881                break;
6882            case ALIGN_CENTER:
6883            default:
6884                grav = 0;
6885                break;
6886        }
6887
6888        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6889        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6890
6891        int hslack = (bottom - top) / 2;
6892        int vslack = hslack;
6893
6894        if (vslack > vspace / 4)
6895            vslack = vspace / 4;
6896        if (hslack > hspace / 4)
6897            hslack = hspace / 4;
6898
6899        int hs = mScrollX;
6900        int vs = mScrollY;
6901
6902        if (top - vs < vslack)
6903            vs = top - vslack;
6904        if (bottom - vs > vspace - vslack)
6905            vs = bottom - (vspace - vslack);
6906        if (ht - vs < vspace)
6907            vs = ht - vspace;
6908        if (0 - vs > 0)
6909            vs = 0;
6910
6911        if (grav != 0) {
6912            if (x - hs < hslack) {
6913                hs = x - hslack;
6914            }
6915            if (x - hs > hspace - hslack) {
6916                hs = x - (hspace - hslack);
6917            }
6918        }
6919
6920        if (grav < 0) {
6921            if (left - hs > 0)
6922                hs = left;
6923            if (right - hs < hspace)
6924                hs = right - hspace;
6925        } else if (grav > 0) {
6926            if (right - hs < hspace)
6927                hs = right - hspace;
6928            if (left - hs > 0)
6929                hs = left;
6930        } else /* grav == 0 */ {
6931            if (right - left <= hspace) {
6932                /*
6933                 * If the entire text fits, center it exactly.
6934                 */
6935                hs = left - (hspace - (right - left)) / 2;
6936            } else if (x > right - hslack) {
6937                /*
6938                 * If we are near the right edge, keep the right edge
6939                 * at the edge of the view.
6940                 */
6941                hs = right - hspace;
6942            } else if (x < left + hslack) {
6943                /*
6944                 * If we are near the left edge, keep the left edge
6945                 * at the edge of the view.
6946                 */
6947                hs = left;
6948            } else if (left > hs) {
6949                /*
6950                 * Is there whitespace visible at the left?  Fix it if so.
6951                 */
6952                hs = left;
6953            } else if (right < hs + hspace) {
6954                /*
6955                 * Is there whitespace visible at the right?  Fix it if so.
6956                 */
6957                hs = right - hspace;
6958            } else {
6959                /*
6960                 * Otherwise, float as needed.
6961                 */
6962                if (x - hs < hslack) {
6963                    hs = x - hslack;
6964                }
6965                if (x - hs > hspace - hslack) {
6966                    hs = x - (hspace - hslack);
6967                }
6968            }
6969        }
6970
6971        if (hs != mScrollX || vs != mScrollY) {
6972            if (mScroller == null) {
6973                scrollTo(hs, vs);
6974            } else {
6975                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6976                int dx = hs - mScrollX;
6977                int dy = vs - mScrollY;
6978
6979                if (duration > ANIMATED_SCROLL_GAP) {
6980                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6981                    awakenScrollBars(mScroller.getDuration());
6982                    invalidate();
6983                } else {
6984                    if (!mScroller.isFinished()) {
6985                        mScroller.abortAnimation();
6986                    }
6987
6988                    scrollBy(dx, dy);
6989                }
6990
6991                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6992            }
6993
6994            changed = true;
6995        }
6996
6997        if (isFocused()) {
6998            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6999            // requestRectangleOnScreen() is in terms of content coordinates.
7000
7001            if (mTempRect == null) mTempRect = new Rect();
7002            // The offsets here are to ensure the rectangle we are using is
7003            // within our view bounds, in case the cursor is on the far left
7004            // or right.  If it isn't withing the bounds, then this request
7005            // will be ignored.
7006            mTempRect.set(x - 2, top, x + 2, bottom);
7007            getInterestingRect(mTempRect, line);
7008            mTempRect.offset(mScrollX, mScrollY);
7009
7010            if (requestRectangleOnScreen(mTempRect)) {
7011                changed = true;
7012            }
7013        }
7014
7015        return changed;
7016    }
7017
7018    /**
7019     * Move the cursor, if needed, so that it is at an offset that is visible
7020     * to the user.  This will not move the cursor if it represents more than
7021     * one character (a selection range).  This will only work if the
7022     * TextView contains spannable text; otherwise it will do nothing.
7023     *
7024     * @return True if the cursor was actually moved, false otherwise.
7025     */
7026    public boolean moveCursorToVisibleOffset() {
7027        if (!(mText instanceof Spannable)) {
7028            return false;
7029        }
7030        int start = getSelectionStart();
7031        int end = getSelectionEnd();
7032        if (start != end) {
7033            return false;
7034        }
7035
7036        // First: make sure the line is visible on screen:
7037
7038        int line = mLayout.getLineForOffset(start);
7039
7040        final int top = mLayout.getLineTop(line);
7041        final int bottom = mLayout.getLineTop(line + 1);
7042        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7043        int vslack = (bottom - top) / 2;
7044        if (vslack > vspace / 4)
7045            vslack = vspace / 4;
7046        final int vs = mScrollY;
7047
7048        if (top < (vs+vslack)) {
7049            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7050        } else if (bottom > (vspace+vs-vslack)) {
7051            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7052        }
7053
7054        // Next: make sure the character is visible on screen:
7055
7056        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7057        final int hs = mScrollX;
7058        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7059        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7060
7061        // line might contain bidirectional text
7062        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7063        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7064
7065        int newStart = start;
7066        if (newStart < lowChar) {
7067            newStart = lowChar;
7068        } else if (newStart > highChar) {
7069            newStart = highChar;
7070        }
7071
7072        if (newStart != start) {
7073            Selection.setSelection((Spannable)mText, newStart);
7074            return true;
7075        }
7076
7077        return false;
7078    }
7079
7080    @Override
7081    public void computeScroll() {
7082        if (mScroller != null) {
7083            if (mScroller.computeScrollOffset()) {
7084                mScrollX = mScroller.getCurrX();
7085                mScrollY = mScroller.getCurrY();
7086                invalidateParentCaches();
7087                postInvalidate();  // So we draw again
7088            }
7089        }
7090    }
7091
7092    private void getInterestingRect(Rect r, int line) {
7093        convertFromViewportToContentCoordinates(r);
7094
7095        // Rectangle can can be expanded on first and last line to take
7096        // padding into account.
7097        // TODO Take left/right padding into account too?
7098        if (line == 0) r.top -= getExtendedPaddingTop();
7099        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7100    }
7101
7102    private void convertFromViewportToContentCoordinates(Rect r) {
7103        final int horizontalOffset = viewportToContentHorizontalOffset();
7104        r.left += horizontalOffset;
7105        r.right += horizontalOffset;
7106
7107        final int verticalOffset = viewportToContentVerticalOffset();
7108        r.top += verticalOffset;
7109        r.bottom += verticalOffset;
7110    }
7111
7112    private int viewportToContentHorizontalOffset() {
7113        return getCompoundPaddingLeft() - mScrollX;
7114    }
7115
7116    private int viewportToContentVerticalOffset() {
7117        int offset = getExtendedPaddingTop() - mScrollY;
7118        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7119            offset += getVerticalOffset(false);
7120        }
7121        return offset;
7122    }
7123
7124    @Override
7125    public void debug(int depth) {
7126        super.debug(depth);
7127
7128        String output = debugIndent(depth);
7129        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7130                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7131                + "} ";
7132
7133        if (mText != null) {
7134
7135            output += "mText=\"" + mText + "\" ";
7136            if (mLayout != null) {
7137                output += "mLayout width=" + mLayout.getWidth()
7138                        + " height=" + mLayout.getHeight();
7139            }
7140        } else {
7141            output += "mText=NULL";
7142        }
7143        Log.d(VIEW_LOG_TAG, output);
7144    }
7145
7146    /**
7147     * Convenience for {@link Selection#getSelectionStart}.
7148     */
7149    @ViewDebug.ExportedProperty(category = "text")
7150    public int getSelectionStart() {
7151        return Selection.getSelectionStart(getText());
7152    }
7153
7154    /**
7155     * Convenience for {@link Selection#getSelectionEnd}.
7156     */
7157    @ViewDebug.ExportedProperty(category = "text")
7158    public int getSelectionEnd() {
7159        return Selection.getSelectionEnd(getText());
7160    }
7161
7162    /**
7163     * Return true iff there is a selection inside this text view.
7164     */
7165    public boolean hasSelection() {
7166        final int selectionStart = getSelectionStart();
7167        final int selectionEnd = getSelectionEnd();
7168
7169        return selectionStart >= 0 && selectionStart != selectionEnd;
7170    }
7171
7172    /**
7173     * Sets the properties of this field (lines, horizontally scrolling,
7174     * transformation method) to be for a single-line input.
7175     *
7176     * @attr ref android.R.styleable#TextView_singleLine
7177     */
7178    public void setSingleLine() {
7179        setSingleLine(true);
7180    }
7181
7182    /**
7183     * Sets the properties of this field to transform input to ALL CAPS
7184     * display. This may use a "small caps" formatting if available.
7185     * This setting will be ignored if this field is editable or selectable.
7186     *
7187     * This call replaces the current transformation method. Disabling this
7188     * will not necessarily restore the previous behavior from before this
7189     * was enabled.
7190     *
7191     * @see #setTransformationMethod(TransformationMethod)
7192     * @attr ref android.R.styleable#TextView_textAllCaps
7193     */
7194    public void setAllCaps(boolean allCaps) {
7195        if (allCaps) {
7196            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7197        } else {
7198            setTransformationMethod(null);
7199        }
7200    }
7201
7202    /**
7203     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7204     * transformation method) to be for a single-line input; if false, restores these to the default
7205     * conditions.
7206     *
7207     * Note that the default conditions are not necessarily those that were in effect prior this
7208     * method, and you may want to reset these properties to your custom values.
7209     *
7210     * @attr ref android.R.styleable#TextView_singleLine
7211     */
7212    @android.view.RemotableViewMethod
7213    public void setSingleLine(boolean singleLine) {
7214        // Could be used, but may break backward compatibility.
7215        // if (mSingleLine == singleLine) return;
7216        setInputTypeSingleLine(singleLine);
7217        applySingleLine(singleLine, true, true);
7218    }
7219
7220    /**
7221     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7222     * @param singleLine
7223     */
7224    private void setInputTypeSingleLine(boolean singleLine) {
7225        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7226            if (singleLine) {
7227                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7228            } else {
7229                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7230            }
7231        }
7232    }
7233
7234    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7235            boolean changeMaxLines) {
7236        mSingleLine = singleLine;
7237        if (singleLine) {
7238            setLines(1);
7239            setHorizontallyScrolling(true);
7240            if (applyTransformation) {
7241                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7242            }
7243        } else {
7244            if (changeMaxLines) {
7245                setMaxLines(Integer.MAX_VALUE);
7246            }
7247            setHorizontallyScrolling(false);
7248            if (applyTransformation) {
7249                setTransformationMethod(null);
7250            }
7251        }
7252    }
7253
7254    /**
7255     * Causes words in the text that are longer than the view is wide
7256     * to be ellipsized instead of broken in the middle.  You may also
7257     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7258     * to constrain the text to a single line.  Use <code>null</code>
7259     * to turn off ellipsizing.
7260     *
7261     * If {@link #setMaxLines} has been used to set two or more lines,
7262     * {@link android.text.TextUtils.TruncateAt#END} and
7263     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7264     * (other ellipsizing types will not do anything).
7265     *
7266     * @attr ref android.R.styleable#TextView_ellipsize
7267     */
7268    public void setEllipsize(TextUtils.TruncateAt where) {
7269        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7270        if (mEllipsize != where) {
7271            mEllipsize = where;
7272
7273            if (mLayout != null) {
7274                nullLayouts();
7275                requestLayout();
7276                invalidate();
7277            }
7278        }
7279    }
7280
7281    /**
7282     * Sets how many times to repeat the marquee animation. Only applied if the
7283     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7284     *
7285     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7286     */
7287    public void setMarqueeRepeatLimit(int marqueeLimit) {
7288        mMarqueeRepeatLimit = marqueeLimit;
7289    }
7290
7291    /**
7292     * Returns where, if anywhere, words that are longer than the view
7293     * is wide should be ellipsized.
7294     */
7295    @ViewDebug.ExportedProperty
7296    public TextUtils.TruncateAt getEllipsize() {
7297        return mEllipsize;
7298    }
7299
7300    /**
7301     * Set the TextView so that when it takes focus, all the text is
7302     * selected.
7303     *
7304     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7305     */
7306    @android.view.RemotableViewMethod
7307    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7308        mSelectAllOnFocus = selectAllOnFocus;
7309
7310        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7311            setText(mText, BufferType.SPANNABLE);
7312        }
7313    }
7314
7315    /**
7316     * Set whether the cursor is visible.  The default is true.
7317     *
7318     * @attr ref android.R.styleable#TextView_cursorVisible
7319     */
7320    @android.view.RemotableViewMethod
7321    public void setCursorVisible(boolean visible) {
7322        if (mCursorVisible != visible) {
7323            mCursorVisible = visible;
7324            invalidate();
7325
7326            makeBlink();
7327
7328            // InsertionPointCursorController depends on mCursorVisible
7329            prepareCursorControllers();
7330        }
7331    }
7332
7333    private boolean isCursorVisible() {
7334        return mCursorVisible && isTextEditable();
7335    }
7336
7337    private boolean canMarquee() {
7338        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7339        return width > 0 && (mLayout.getLineWidth(0) > width ||
7340                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7341                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7342    }
7343
7344    private void startMarquee() {
7345        // Do not ellipsize EditText
7346        if (mInput != null) return;
7347
7348        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7349            return;
7350        }
7351
7352        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7353                getLineCount() == 1 && canMarquee()) {
7354
7355            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7356                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7357                final Layout tmp = mLayout;
7358                mLayout = mSavedMarqueeModeLayout;
7359                mSavedMarqueeModeLayout = tmp;
7360                setHorizontalFadingEdgeEnabled(true);
7361                requestLayout();
7362                invalidate();
7363            }
7364
7365            if (mMarquee == null) mMarquee = new Marquee(this);
7366            mMarquee.start(mMarqueeRepeatLimit);
7367        }
7368    }
7369
7370    private void stopMarquee() {
7371        if (mMarquee != null && !mMarquee.isStopped()) {
7372            mMarquee.stop();
7373        }
7374
7375        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7376            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7377            final Layout tmp = mSavedMarqueeModeLayout;
7378            mSavedMarqueeModeLayout = mLayout;
7379            mLayout = tmp;
7380            setHorizontalFadingEdgeEnabled(false);
7381            requestLayout();
7382            invalidate();
7383        }
7384    }
7385
7386    private void startStopMarquee(boolean start) {
7387        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7388            if (start) {
7389                startMarquee();
7390            } else {
7391                stopMarquee();
7392            }
7393        }
7394    }
7395
7396    private static final class Marquee extends Handler {
7397        // TODO: Add an option to configure this
7398        private static final float MARQUEE_DELTA_MAX = 0.07f;
7399        private static final int MARQUEE_DELAY = 1200;
7400        private static final int MARQUEE_RESTART_DELAY = 1200;
7401        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7402        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7403
7404        private static final byte MARQUEE_STOPPED = 0x0;
7405        private static final byte MARQUEE_STARTING = 0x1;
7406        private static final byte MARQUEE_RUNNING = 0x2;
7407
7408        private static final int MESSAGE_START = 0x1;
7409        private static final int MESSAGE_TICK = 0x2;
7410        private static final int MESSAGE_RESTART = 0x3;
7411
7412        private final WeakReference<TextView> mView;
7413
7414        private byte mStatus = MARQUEE_STOPPED;
7415        private final float mScrollUnit;
7416        private float mMaxScroll;
7417        float mMaxFadeScroll;
7418        private float mGhostStart;
7419        private float mGhostOffset;
7420        private float mFadeStop;
7421        private int mRepeatLimit;
7422
7423        float mScroll;
7424
7425        Marquee(TextView v) {
7426            final float density = v.getContext().getResources().getDisplayMetrics().density;
7427            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7428            mView = new WeakReference<TextView>(v);
7429        }
7430
7431        @Override
7432        public void handleMessage(Message msg) {
7433            switch (msg.what) {
7434                case MESSAGE_START:
7435                    mStatus = MARQUEE_RUNNING;
7436                    tick();
7437                    break;
7438                case MESSAGE_TICK:
7439                    tick();
7440                    break;
7441                case MESSAGE_RESTART:
7442                    if (mStatus == MARQUEE_RUNNING) {
7443                        if (mRepeatLimit >= 0) {
7444                            mRepeatLimit--;
7445                        }
7446                        start(mRepeatLimit);
7447                    }
7448                    break;
7449            }
7450        }
7451
7452        void tick() {
7453            if (mStatus != MARQUEE_RUNNING) {
7454                return;
7455            }
7456
7457            removeMessages(MESSAGE_TICK);
7458
7459            final TextView textView = mView.get();
7460            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7461                mScroll += mScrollUnit;
7462                if (mScroll > mMaxScroll) {
7463                    mScroll = mMaxScroll;
7464                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7465                } else {
7466                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7467                }
7468                textView.invalidate();
7469            }
7470        }
7471
7472        void stop() {
7473            mStatus = MARQUEE_STOPPED;
7474            removeMessages(MESSAGE_START);
7475            removeMessages(MESSAGE_RESTART);
7476            removeMessages(MESSAGE_TICK);
7477            resetScroll();
7478        }
7479
7480        private void resetScroll() {
7481            mScroll = 0.0f;
7482            final TextView textView = mView.get();
7483            if (textView != null) textView.invalidate();
7484        }
7485
7486        void start(int repeatLimit) {
7487            if (repeatLimit == 0) {
7488                stop();
7489                return;
7490            }
7491            mRepeatLimit = repeatLimit;
7492            final TextView textView = mView.get();
7493            if (textView != null && textView.mLayout != null) {
7494                mStatus = MARQUEE_STARTING;
7495                mScroll = 0.0f;
7496                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7497                        textView.getCompoundPaddingRight();
7498                final float lineWidth = textView.mLayout.getLineWidth(0);
7499                final float gap = textWidth / 3.0f;
7500                mGhostStart = lineWidth - textWidth + gap;
7501                mMaxScroll = mGhostStart + textWidth;
7502                mGhostOffset = lineWidth + gap;
7503                mFadeStop = lineWidth + textWidth / 6.0f;
7504                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7505
7506                textView.invalidate();
7507                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7508            }
7509        }
7510
7511        float getGhostOffset() {
7512            return mGhostOffset;
7513        }
7514
7515        boolean shouldDrawLeftFade() {
7516            return mScroll <= mFadeStop;
7517        }
7518
7519        boolean shouldDrawGhost() {
7520            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7521        }
7522
7523        boolean isRunning() {
7524            return mStatus == MARQUEE_RUNNING;
7525        }
7526
7527        boolean isStopped() {
7528            return mStatus == MARQUEE_STOPPED;
7529        }
7530    }
7531
7532    /**
7533     * This method is called when the text is changed, in case any subclasses
7534     * would like to know.
7535     *
7536     * Within <code>text</code>, the <code>lengthAfter</code> characters
7537     * beginning at <code>start</code> have just replaced old text that had
7538     * length <code>lengthBefore</code>. It is an error to attempt to make
7539     * changes to <code>text</code> from this callback.
7540     *
7541     * @param text The text the TextView is displaying
7542     * @param start The offset of the start of the range of the text that was
7543     * modified
7544     * @param lengthBefore The length of the former text that has been replaced
7545     * @param lengthAfter The length of the replacement modified text
7546     */
7547    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7548        // intentionally empty, template pattern method can be overridden by subclasses
7549    }
7550
7551    /**
7552     * This method is called when the selection has changed, in case any
7553     * subclasses would like to know.
7554     *
7555     * @param selStart The new selection start location.
7556     * @param selEnd The new selection end location.
7557     */
7558    protected void onSelectionChanged(int selStart, int selEnd) {
7559        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7560    }
7561
7562    /**
7563     * Adds a TextWatcher to the list of those whose methods are called
7564     * whenever this TextView's text changes.
7565     * <p>
7566     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7567     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7568     * if there are any text changed listeners forces the buffer type to
7569     * Editable if it would not otherwise be and does call this method.
7570     */
7571    public void addTextChangedListener(TextWatcher watcher) {
7572        if (mListeners == null) {
7573            mListeners = new ArrayList<TextWatcher>();
7574        }
7575
7576        mListeners.add(watcher);
7577    }
7578
7579    /**
7580     * Removes the specified TextWatcher from the list of those whose
7581     * methods are called
7582     * whenever this TextView's text changes.
7583     */
7584    public void removeTextChangedListener(TextWatcher watcher) {
7585        if (mListeners != null) {
7586            int i = mListeners.indexOf(watcher);
7587
7588            if (i >= 0) {
7589                mListeners.remove(i);
7590            }
7591        }
7592    }
7593
7594    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7595        if (mListeners != null) {
7596            final ArrayList<TextWatcher> list = mListeners;
7597            final int count = list.size();
7598            for (int i = 0; i < count; i++) {
7599                list.get(i).beforeTextChanged(text, start, before, after);
7600            }
7601        }
7602
7603        // The spans that are inside or intersect the modified region no longer make sense
7604        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7605        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7606    }
7607
7608    // Removes all spans that are inside or actually overlap the start..end range
7609    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7610        if (!(mText instanceof Editable)) return;
7611        Editable text = (Editable) mText;
7612
7613        T[] spans = text.getSpans(start, end, type);
7614        final int length = spans.length;
7615        for (int i = 0; i < length; i++) {
7616            final int s = text.getSpanStart(spans[i]);
7617            final int e = text.getSpanEnd(spans[i]);
7618            // Spans that are adjacent to the edited region will be handled in
7619            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7620            if (e == start || s == end) break;
7621            text.removeSpan(spans[i]);
7622        }
7623    }
7624
7625    /**
7626     * Not private so it can be called from an inner class without going
7627     * through a thunk.
7628     */
7629    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7630        if (mListeners != null) {
7631            final ArrayList<TextWatcher> list = mListeners;
7632            final int count = list.size();
7633            for (int i = 0; i < count; i++) {
7634                list.get(i).onTextChanged(text, start, before, after);
7635            }
7636        }
7637
7638        updateSpellCheckSpans(start, start + after, false);
7639
7640        // Hide the controllers as soon as text is modified (typing, procedural...)
7641        // We do not hide the span controllers, since they can be added when a new text is
7642        // inserted into the text view (voice IME).
7643        hideCursorControllers();
7644    }
7645
7646    /**
7647     * Not private so it can be called from an inner class without going
7648     * through a thunk.
7649     */
7650    void sendAfterTextChanged(Editable text) {
7651        if (mListeners != null) {
7652            final ArrayList<TextWatcher> list = mListeners;
7653            final int count = list.size();
7654            for (int i = 0; i < count; i++) {
7655                list.get(i).afterTextChanged(text);
7656            }
7657        }
7658    }
7659
7660    /**
7661     * Not private so it can be called from an inner class without going
7662     * through a thunk.
7663     */
7664    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7665        final InputMethodState ims = mInputMethodState;
7666        if (ims == null || ims.mBatchEditNesting == 0) {
7667            updateAfterEdit();
7668        }
7669        if (ims != null) {
7670            ims.mContentChanged = true;
7671            if (ims.mChangedStart < 0) {
7672                ims.mChangedStart = start;
7673                ims.mChangedEnd = start+before;
7674            } else {
7675                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7676                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7677            }
7678            ims.mChangedDelta += after-before;
7679        }
7680
7681        sendOnTextChanged(buffer, start, before, after);
7682        onTextChanged(buffer, start, before, after);
7683    }
7684
7685    /**
7686     * Not private so it can be called from an inner class without going
7687     * through a thunk.
7688     */
7689    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7690        // XXX Make the start and end move together if this ends up
7691        // spending too much time invalidating.
7692
7693        boolean selChanged = false;
7694        int newSelStart=-1, newSelEnd=-1;
7695
7696        final InputMethodState ims = mInputMethodState;
7697
7698        if (what == Selection.SELECTION_END) {
7699            mHighlightPathBogus = true;
7700            selChanged = true;
7701            newSelEnd = newStart;
7702
7703            if (!isFocused()) {
7704                mSelectionMoved = true;
7705            }
7706
7707            if (oldStart >= 0 || newStart >= 0) {
7708                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7709                registerForPreDraw();
7710                makeBlink();
7711            }
7712        }
7713
7714        if (what == Selection.SELECTION_START) {
7715            mHighlightPathBogus = true;
7716            selChanged = true;
7717            newSelStart = newStart;
7718
7719            if (!isFocused()) {
7720                mSelectionMoved = true;
7721            }
7722
7723            if (oldStart >= 0 || newStart >= 0) {
7724                int end = Selection.getSelectionEnd(buf);
7725                invalidateCursor(end, oldStart, newStart);
7726            }
7727        }
7728
7729        if (selChanged) {
7730            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7731                if (newSelStart < 0) {
7732                    newSelStart = Selection.getSelectionStart(buf);
7733                }
7734                if (newSelEnd < 0) {
7735                    newSelEnd = Selection.getSelectionEnd(buf);
7736                }
7737                onSelectionChanged(newSelStart, newSelEnd);
7738            }
7739        }
7740
7741        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle) {
7742            if (ims == null || ims.mBatchEditNesting == 0) {
7743                invalidate();
7744                mHighlightPathBogus = true;
7745                checkForResize();
7746            } else {
7747                ims.mContentChanged = true;
7748            }
7749        }
7750
7751        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7752            mHighlightPathBogus = true;
7753            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7754                ims.mSelectionModeChanged = true;
7755            }
7756
7757            if (Selection.getSelectionStart(buf) >= 0) {
7758                if (ims == null || ims.mBatchEditNesting == 0) {
7759                    invalidateCursor();
7760                } else {
7761                    ims.mCursorChanged = true;
7762                }
7763            }
7764        }
7765
7766        if (what instanceof ParcelableSpan) {
7767            // If this is a span that can be sent to a remote process,
7768            // the current extract editor would be interested in it.
7769            if (ims != null && ims.mExtracting != null) {
7770                if (ims.mBatchEditNesting != 0) {
7771                    if (oldStart >= 0) {
7772                        if (ims.mChangedStart > oldStart) {
7773                            ims.mChangedStart = oldStart;
7774                        }
7775                        if (ims.mChangedStart > oldEnd) {
7776                            ims.mChangedStart = oldEnd;
7777                        }
7778                    }
7779                    if (newStart >= 0) {
7780                        if (ims.mChangedStart > newStart) {
7781                            ims.mChangedStart = newStart;
7782                        }
7783                        if (ims.mChangedStart > newEnd) {
7784                            ims.mChangedStart = newEnd;
7785                        }
7786                    }
7787                } else {
7788                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7789                            + oldStart + "-" + oldEnd + ","
7790                            + newStart + "-" + newEnd + what);
7791                    ims.mContentChanged = true;
7792                }
7793            }
7794        }
7795
7796        if (mSpellChecker != null && newStart < 0 && what instanceof SpellCheckSpan) {
7797            mSpellChecker.removeSpellCheckSpan((SpellCheckSpan) what);
7798        }
7799    }
7800
7801    /**
7802     * Create new SpellCheckSpans on the modified region.
7803     */
7804    private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) {
7805        if (isTextEditable() && isSuggestionsEnabled()) {
7806            if (mSpellChecker == null && createSpellChecker) {
7807                mSpellChecker = new SpellChecker(this);
7808            }
7809            if (mSpellChecker != null) {
7810                mSpellChecker.spellCheck(start, end);
7811            }
7812        }
7813    }
7814
7815    /**
7816     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7817     * pop-up should be displayed.
7818     */
7819    private class EasyEditSpanController {
7820
7821        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7822
7823        private EasyEditPopupWindow mPopupWindow;
7824
7825        private EasyEditSpan mEasyEditSpan;
7826
7827        private Runnable mHidePopup;
7828
7829        private void hide() {
7830            if (mPopupWindow != null) {
7831                mPopupWindow.hide();
7832                TextView.this.removeCallbacks(mHidePopup);
7833            }
7834            removeSpans(mText);
7835            mEasyEditSpan = null;
7836        }
7837
7838        /**
7839         * Monitors the changes in the text.
7840         *
7841         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7842         * as the notifications are not sent when a spannable (with spans) is inserted.
7843         */
7844        public void onTextChange(CharSequence buffer) {
7845            adjustSpans(mText);
7846
7847            if (getWindowVisibility() != View.VISIBLE) {
7848                // The window is not visible yet, ignore the text change.
7849                return;
7850            }
7851
7852            if (mLayout == null) {
7853                // The view has not been layout yet, ignore the text change
7854                return;
7855            }
7856
7857            InputMethodManager imm = InputMethodManager.peekInstance();
7858            if (!(TextView.this instanceof ExtractEditText)
7859                    && imm != null && imm.isFullscreenMode()) {
7860                // The input is in extract mode. We do not have to handle the easy edit in the
7861                // original TextView, as the ExtractEditText will do
7862                return;
7863            }
7864
7865            // Remove the current easy edit span, as the text changed, and remove the pop-up
7866            // (if any)
7867            if (mEasyEditSpan != null) {
7868                if (mText instanceof Spannable) {
7869                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7870                }
7871                mEasyEditSpan = null;
7872            }
7873            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7874                mPopupWindow.hide();
7875            }
7876
7877            // Display the new easy edit span (if any).
7878            if (buffer instanceof Spanned) {
7879                mEasyEditSpan = getSpan((Spanned) buffer);
7880                if (mEasyEditSpan != null) {
7881                    if (mPopupWindow == null) {
7882                        mPopupWindow = new EasyEditPopupWindow();
7883                        mHidePopup = new Runnable() {
7884                            @Override
7885                            public void run() {
7886                                hide();
7887                            }
7888                        };
7889                    }
7890                    mPopupWindow.show(mEasyEditSpan);
7891                    TextView.this.removeCallbacks(mHidePopup);
7892                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7893                }
7894            }
7895        }
7896
7897        /**
7898         * Adjusts the spans by removing all of them except the last one.
7899         */
7900        private void adjustSpans(CharSequence buffer) {
7901            // This method enforces that only one easy edit span is attached to the text.
7902            // A better way to enforce this would be to listen for onSpanAdded, but this method
7903            // cannot be used in this scenario as no notification is triggered when a text with
7904            // spans is inserted into a text.
7905            if (buffer instanceof Spannable) {
7906                Spannable spannable = (Spannable) buffer;
7907                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7908                        EasyEditSpan.class);
7909                for (int i = 0; i < spans.length - 1; i++) {
7910                    spannable.removeSpan(spans[i]);
7911                }
7912            }
7913        }
7914
7915        /**
7916         * Removes all the {@link EasyEditSpan} currently attached.
7917         */
7918        private void removeSpans(CharSequence buffer) {
7919            if (buffer instanceof Spannable) {
7920                Spannable spannable = (Spannable) buffer;
7921                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7922                        EasyEditSpan.class);
7923                for (int i = 0; i < spans.length; i++) {
7924                    spannable.removeSpan(spans[i]);
7925                }
7926            }
7927        }
7928
7929        private EasyEditSpan getSpan(Spanned spanned) {
7930            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7931                    EasyEditSpan.class);
7932            if (easyEditSpans.length == 0) {
7933                return null;
7934            } else {
7935                return easyEditSpans[0];
7936            }
7937        }
7938    }
7939
7940    /**
7941     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7942     * by {@link EasyEditSpanController}.
7943     */
7944    private class EasyEditPopupWindow extends PinnedPopupWindow
7945            implements OnClickListener {
7946        private static final int POPUP_TEXT_LAYOUT =
7947                com.android.internal.R.layout.text_edit_action_popup_text;
7948        private TextView mDeleteTextView;
7949        private EasyEditSpan mEasyEditSpan;
7950
7951        @Override
7952        protected void createPopupWindow() {
7953            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7954                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7955            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7956            mPopupWindow.setClippingEnabled(true);
7957        }
7958
7959        @Override
7960        protected void initContentView() {
7961            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7962            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7963            mContentView = linearLayout;
7964            mContentView.setBackgroundResource(
7965                    com.android.internal.R.drawable.text_edit_side_paste_window);
7966
7967            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7968                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7969
7970            LayoutParams wrapContent = new LayoutParams(
7971                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7972
7973            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7974            mDeleteTextView.setLayoutParams(wrapContent);
7975            mDeleteTextView.setText(com.android.internal.R.string.delete);
7976            mDeleteTextView.setOnClickListener(this);
7977            mContentView.addView(mDeleteTextView);
7978        }
7979
7980        public void show(EasyEditSpan easyEditSpan) {
7981            mEasyEditSpan = easyEditSpan;
7982            super.show();
7983        }
7984
7985        @Override
7986        public void onClick(View view) {
7987            if (view == mDeleteTextView) {
7988                Editable editable = (Editable) mText;
7989                int start = editable.getSpanStart(mEasyEditSpan);
7990                int end = editable.getSpanEnd(mEasyEditSpan);
7991                if (start >= 0 && end >= 0) {
7992                    deleteText_internal(start, end);
7993                }
7994            }
7995        }
7996
7997        @Override
7998        protected int getTextOffset() {
7999            // Place the pop-up at the end of the span
8000            Editable editable = (Editable) mText;
8001            return editable.getSpanEnd(mEasyEditSpan);
8002        }
8003
8004        @Override
8005        protected int getVerticalLocalPosition(int line) {
8006            return mLayout.getLineBottom(line);
8007        }
8008
8009        @Override
8010        protected int clipVertically(int positionY) {
8011            // As we display the pop-up below the span, no vertical clipping is required.
8012            return positionY;
8013        }
8014    }
8015
8016    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8017
8018        private CharSequence mBeforeText;
8019
8020        private EasyEditSpanController mEasyEditSpanController;
8021
8022        private ChangeWatcher() {
8023            mEasyEditSpanController = new EasyEditSpanController();
8024        }
8025
8026        public void beforeTextChanged(CharSequence buffer, int start,
8027                                      int before, int after) {
8028            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8029                    + " before=" + before + " after=" + after + ": " + buffer);
8030
8031            if (AccessibilityManager.getInstance(mContext).isEnabled()
8032                    && !isPasswordInputType(mInputType)
8033                    && !hasPasswordTransformationMethod()) {
8034                mBeforeText = buffer.toString();
8035            }
8036
8037            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8038        }
8039
8040        public void onTextChanged(CharSequence buffer, int start,
8041                                  int before, int after) {
8042            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8043                    + " before=" + before + " after=" + after + ": " + buffer);
8044            TextView.this.handleTextChanged(buffer, start, before, after);
8045
8046            mEasyEditSpanController.onTextChange(buffer);
8047
8048            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8049                    (isFocused() || isSelected() && isShown())) {
8050                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8051                mBeforeText = null;
8052            }
8053        }
8054
8055        public void afterTextChanged(Editable buffer) {
8056            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8057            TextView.this.sendAfterTextChanged(buffer);
8058
8059            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8060                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8061            }
8062        }
8063
8064        public void onSpanChanged(Spannable buf,
8065                                  Object what, int s, int e, int st, int en) {
8066            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8067                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8068            TextView.this.spanChange(buf, what, s, st, e, en);
8069        }
8070
8071        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8072            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8073                    + " what=" + what + ": " + buf);
8074            TextView.this.spanChange(buf, what, -1, s, -1, e);
8075        }
8076
8077        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8078            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8079                    + " what=" + what + ": " + buf);
8080            TextView.this.spanChange(buf, what, s, -1, e, -1);
8081        }
8082
8083        private void hideControllers() {
8084            mEasyEditSpanController.hide();
8085        }
8086    }
8087
8088    /**
8089     * @hide
8090     */
8091    @Override
8092    public void dispatchFinishTemporaryDetach() {
8093        mDispatchTemporaryDetach = true;
8094        super.dispatchFinishTemporaryDetach();
8095        mDispatchTemporaryDetach = false;
8096    }
8097
8098    @Override
8099    public void onStartTemporaryDetach() {
8100        super.onStartTemporaryDetach();
8101        // Only track when onStartTemporaryDetach() is called directly,
8102        // usually because this instance is an editable field in a list
8103        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8104
8105        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8106        // selection becomes visible again. Until a better solution is found, stop text selection
8107        // mode (if any) as soon as this TextView is recycled.
8108        hideControllers();
8109    }
8110
8111    @Override
8112    public void onFinishTemporaryDetach() {
8113        super.onFinishTemporaryDetach();
8114        // Only track when onStartTemporaryDetach() is called directly,
8115        // usually because this instance is an editable field in a list
8116        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8117    }
8118
8119    @Override
8120    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8121        if (mTemporaryDetach) {
8122            // If we are temporarily in the detach state, then do nothing.
8123            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8124            return;
8125        }
8126
8127        mShowCursor = SystemClock.uptimeMillis();
8128
8129        ensureEndedBatchEdit();
8130
8131        if (focused) {
8132            int selStart = getSelectionStart();
8133            int selEnd = getSelectionEnd();
8134
8135            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8136            // mode for these, unless there was a specific selection already started.
8137            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8138                    selEnd == mText.length();
8139            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8140
8141            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8142                // If a tap was used to give focus to that view, move cursor at tap position.
8143                // Has to be done before onTakeFocus, which can be overloaded.
8144                final int lastTapPosition = getLastTapPosition();
8145                if (lastTapPosition >= 0) {
8146                    Selection.setSelection((Spannable) mText, lastTapPosition);
8147                }
8148
8149                if (mMovement != null) {
8150                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8151                }
8152
8153                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8154                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8155                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8156                // This special case ensure that we keep current selection in that case.
8157                // It would be better to know why the DecorView does not have focus at that time.
8158                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8159                        selStart >= 0 && selEnd >= 0) {
8160                    /*
8161                     * Someone intentionally set the selection, so let them
8162                     * do whatever it is that they wanted to do instead of
8163                     * the default on-focus behavior.  We reset the selection
8164                     * here instead of just skipping the onTakeFocus() call
8165                     * because some movement methods do something other than
8166                     * just setting the selection in theirs and we still
8167                     * need to go through that path.
8168                     */
8169                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8170                }
8171
8172                if (mSelectAllOnFocus) {
8173                    selectAll();
8174                }
8175
8176                mTouchFocusSelected = true;
8177            }
8178
8179            mFrozenWithFocus = false;
8180            mSelectionMoved = false;
8181
8182            if (mText instanceof Spannable) {
8183                Spannable sp = (Spannable) mText;
8184                MetaKeyKeyListener.resetMetaState(sp);
8185            }
8186
8187            makeBlink();
8188
8189            if (mError != null) {
8190                showError();
8191            }
8192        } else {
8193            if (mError != null) {
8194                hideError();
8195            }
8196            // Don't leave us in the middle of a batch edit.
8197            onEndBatchEdit();
8198
8199            if (this instanceof ExtractEditText) {
8200                // terminateTextSelectionMode removes selection, which we want to keep when
8201                // ExtractEditText goes out of focus.
8202                final int selStart = getSelectionStart();
8203                final int selEnd = getSelectionEnd();
8204                hideControllers();
8205                Selection.setSelection((Spannable) mText, selStart, selEnd);
8206            } else {
8207                hideControllers();
8208                downgradeEasyCorrectionSpans();
8209            }
8210
8211            // No need to create the controller
8212            if (mSelectionModifierCursorController != null) {
8213                mSelectionModifierCursorController.resetTouchOffsets();
8214            }
8215        }
8216
8217        startStopMarquee(focused);
8218
8219        if (mTransformation != null) {
8220            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8221        }
8222
8223        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8224    }
8225
8226    private int getLastTapPosition() {
8227        // No need to create the controller at that point, no last tap position saved
8228        if (mSelectionModifierCursorController != null) {
8229            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8230            if (lastTapPosition >= 0) {
8231                // Safety check, should not be possible.
8232                if (lastTapPosition > mText.length()) {
8233                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8234                            + mText.length() + ")");
8235                    lastTapPosition = mText.length();
8236                }
8237                return lastTapPosition;
8238            }
8239        }
8240
8241        return -1;
8242    }
8243
8244    @Override
8245    public void onWindowFocusChanged(boolean hasWindowFocus) {
8246        super.onWindowFocusChanged(hasWindowFocus);
8247
8248        if (hasWindowFocus) {
8249            if (mBlink != null) {
8250                mBlink.uncancel();
8251                makeBlink();
8252            }
8253        } else {
8254            if (mBlink != null) {
8255                mBlink.cancel();
8256            }
8257            // Don't leave us in the middle of a batch edit.
8258            onEndBatchEdit();
8259            if (mInputContentType != null) {
8260                mInputContentType.enterDown = false;
8261            }
8262
8263            hideControllers();
8264            if (mSuggestionsPopupWindow != null) {
8265                mSuggestionsPopupWindow.onParentLostFocus();
8266            }
8267        }
8268
8269        startStopMarquee(hasWindowFocus);
8270    }
8271
8272    @Override
8273    protected void onVisibilityChanged(View changedView, int visibility) {
8274        super.onVisibilityChanged(changedView, visibility);
8275        if (visibility != VISIBLE) {
8276            hideControllers();
8277        }
8278    }
8279
8280    /**
8281     * Use {@link BaseInputConnection#removeComposingSpans
8282     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8283     * state from this text view.
8284     */
8285    public void clearComposingText() {
8286        if (mText instanceof Spannable) {
8287            BaseInputConnection.removeComposingSpans((Spannable)mText);
8288        }
8289    }
8290
8291    @Override
8292    public void setSelected(boolean selected) {
8293        boolean wasSelected = isSelected();
8294
8295        super.setSelected(selected);
8296
8297        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8298            if (selected) {
8299                startMarquee();
8300            } else {
8301                stopMarquee();
8302            }
8303        }
8304    }
8305
8306    @Override
8307    public boolean onTouchEvent(MotionEvent event) {
8308        final int action = event.getActionMasked();
8309
8310        if (hasSelectionController()) {
8311            getSelectionController().onTouchEvent(event);
8312        }
8313
8314        if (action == MotionEvent.ACTION_DOWN) {
8315            mLastDownPositionX = event.getX();
8316            mLastDownPositionY = event.getY();
8317
8318            // Reset this state; it will be re-set if super.onTouchEvent
8319            // causes focus to move to the view.
8320            mTouchFocusSelected = false;
8321            mIgnoreActionUpEvent = false;
8322        }
8323
8324        final boolean superResult = super.onTouchEvent(event);
8325
8326        /*
8327         * Don't handle the release after a long press, because it will
8328         * move the selection away from whatever the menu action was
8329         * trying to affect.
8330         */
8331        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8332            mDiscardNextActionUp = false;
8333            return superResult;
8334        }
8335
8336        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8337                !shouldIgnoreActionUpEvent() && isFocused();
8338
8339         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8340                && mText instanceof Spannable && mLayout != null) {
8341            boolean handled = false;
8342
8343            if (mMovement != null) {
8344                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8345            }
8346
8347            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8348                // The LinkMovementMethod which should handle taps on links has not been installed
8349                // on non editable text that support text selection.
8350                // We reproduce its behavior here to open links for these.
8351                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8352                        getSelectionEnd(), ClickableSpan.class);
8353
8354                if (links.length != 0) {
8355                    links[0].onClick(this);
8356                    handled = true;
8357                }
8358            }
8359
8360            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8361                // Show the IME, except when selecting in read-only text.
8362                final InputMethodManager imm = InputMethodManager.peekInstance();
8363                viewClicked(imm);
8364                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8365                    handled |= imm != null && imm.showSoftInput(this, 0);
8366                }
8367
8368                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8369                hideControllers();
8370                if (!selectAllGotFocus && mText.length() > 0) {
8371                    if (mSpellChecker != null) {
8372                        // When the cursor moves, the word that was typed may need spell check
8373                        mSpellChecker.onSelectionChanged();
8374                    }
8375                    if (!extractedTextModeWillBeStarted()) {
8376                        if (isCursorInsideEasyCorrectionSpan()) {
8377                            showSuggestions();
8378                        } else if (hasInsertionController()) {
8379                            getInsertionController().show();
8380                        }
8381                    }
8382                }
8383
8384                handled = true;
8385            }
8386
8387            if (handled) {
8388                return true;
8389            }
8390        }
8391
8392        return superResult;
8393    }
8394
8395    /**
8396     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8397     */
8398    private boolean isCursorInsideSuggestionSpan() {
8399        if (!(mText instanceof Spannable)) return false;
8400
8401        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8402                getSelectionEnd(), SuggestionSpan.class);
8403        return (suggestionSpans.length > 0);
8404    }
8405
8406    /**
8407     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8408     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8409     */
8410    private boolean isCursorInsideEasyCorrectionSpan() {
8411        Spannable spannable = (Spannable) mText;
8412        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8413                getSelectionEnd(), SuggestionSpan.class);
8414        for (int i = 0; i < suggestionSpans.length; i++) {
8415            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8416                return true;
8417            }
8418        }
8419        return false;
8420    }
8421
8422    /**
8423     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8424     * span.
8425     */
8426    private void downgradeEasyCorrectionSpans() {
8427        if (mText instanceof Spannable) {
8428            Spannable spannable = (Spannable) mText;
8429            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8430                    spannable.length(), SuggestionSpan.class);
8431            for (int i = 0; i < suggestionSpans.length; i++) {
8432                int flags = suggestionSpans[i].getFlags();
8433                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8434                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8435                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8436                    suggestionSpans[i].setFlags(flags);
8437                }
8438            }
8439        }
8440    }
8441
8442    @Override
8443    public boolean onGenericMotionEvent(MotionEvent event) {
8444        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8445            try {
8446                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8447                    return true;
8448                }
8449            } catch (AbstractMethodError ex) {
8450                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8451                // Ignore its absence in case third party applications implemented the
8452                // interface directly.
8453            }
8454        }
8455        return super.onGenericMotionEvent(event);
8456    }
8457
8458    private void prepareCursorControllers() {
8459        boolean windowSupportsHandles = false;
8460
8461        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8462        if (params instanceof WindowManager.LayoutParams) {
8463            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8464            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8465                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8466        }
8467
8468        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8469        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8470                mLayout != null;
8471
8472        if (!mInsertionControllerEnabled) {
8473            hideInsertionPointCursorController();
8474            if (mInsertionPointCursorController != null) {
8475                mInsertionPointCursorController.onDetached();
8476                mInsertionPointCursorController = null;
8477            }
8478        }
8479
8480        if (!mSelectionControllerEnabled) {
8481            stopSelectionActionMode();
8482            if (mSelectionModifierCursorController != null) {
8483                mSelectionModifierCursorController.onDetached();
8484                mSelectionModifierCursorController = null;
8485            }
8486        }
8487    }
8488
8489    /**
8490     * @return True iff this TextView contains a text that can be edited, or if this is
8491     * a selectable TextView.
8492     */
8493    private boolean isTextEditable() {
8494        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8495    }
8496
8497    /**
8498     * Returns true, only while processing a touch gesture, if the initial
8499     * touch down event caused focus to move to the text view and as a result
8500     * its selection changed.  Only valid while processing the touch gesture
8501     * of interest.
8502     */
8503    public boolean didTouchFocusSelect() {
8504        return mTouchFocusSelected;
8505    }
8506
8507    @Override
8508    public void cancelLongPress() {
8509        super.cancelLongPress();
8510        mIgnoreActionUpEvent = true;
8511    }
8512
8513    /**
8514     * This method is only valid during a touch event.
8515     *
8516     * @return true when the ACTION_UP event should be ignored, false otherwise.
8517     *
8518     * @hide
8519     */
8520    public boolean shouldIgnoreActionUpEvent() {
8521        return mIgnoreActionUpEvent;
8522    }
8523
8524    @Override
8525    public boolean onTrackballEvent(MotionEvent event) {
8526        if (mMovement != null && mText instanceof Spannable &&
8527            mLayout != null) {
8528            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8529                return true;
8530            }
8531        }
8532
8533        return super.onTrackballEvent(event);
8534    }
8535
8536    public void setScroller(Scroller s) {
8537        mScroller = s;
8538    }
8539
8540    private static class Blink extends Handler implements Runnable {
8541        private final WeakReference<TextView> mView;
8542        private boolean mCancelled;
8543
8544        public Blink(TextView v) {
8545            mView = new WeakReference<TextView>(v);
8546        }
8547
8548        public void run() {
8549            if (mCancelled) {
8550                return;
8551            }
8552
8553            removeCallbacks(Blink.this);
8554
8555            TextView tv = mView.get();
8556
8557            if (tv != null && tv.shouldBlink()) {
8558                if (tv.mLayout != null) {
8559                    tv.invalidateCursorPath();
8560                }
8561
8562                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8563            }
8564        }
8565
8566        void cancel() {
8567            if (!mCancelled) {
8568                removeCallbacks(Blink.this);
8569                mCancelled = true;
8570            }
8571        }
8572
8573        void uncancel() {
8574            mCancelled = false;
8575        }
8576    }
8577
8578    /**
8579     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8580     */
8581    private boolean shouldBlink() {
8582        if (!isFocused()) return false;
8583
8584        final int start = getSelectionStart();
8585        if (start < 0) return false;
8586
8587        final int end = getSelectionEnd();
8588        if (end < 0) return false;
8589
8590        return start == end;
8591    }
8592
8593    private void makeBlink() {
8594        if (isCursorVisible()) {
8595            if (shouldBlink()) {
8596                mShowCursor = SystemClock.uptimeMillis();
8597                if (mBlink == null) mBlink = new Blink(this);
8598                mBlink.removeCallbacks(mBlink);
8599                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8600            }
8601        } else {
8602            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8603        }
8604    }
8605
8606    @Override
8607    protected float getLeftFadingEdgeStrength() {
8608        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8609        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8610                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8611            if (mMarquee != null && !mMarquee.isStopped()) {
8612                final Marquee marquee = mMarquee;
8613                if (marquee.shouldDrawLeftFade()) {
8614                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8615                } else {
8616                    return 0.0f;
8617                }
8618            } else if (getLineCount() == 1) {
8619                final int layoutDirection = getResolvedLayoutDirection();
8620                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8621                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8622                    case Gravity.LEFT:
8623                        return 0.0f;
8624                    case Gravity.RIGHT:
8625                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8626                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8627                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8628                    case Gravity.CENTER_HORIZONTAL:
8629                        return 0.0f;
8630                }
8631            }
8632        }
8633        return super.getLeftFadingEdgeStrength();
8634    }
8635
8636    @Override
8637    protected float getRightFadingEdgeStrength() {
8638        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8639        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8640                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8641            if (mMarquee != null && !mMarquee.isStopped()) {
8642                final Marquee marquee = mMarquee;
8643                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8644            } else if (getLineCount() == 1) {
8645                final int layoutDirection = getResolvedLayoutDirection();
8646                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8647                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8648                    case Gravity.LEFT:
8649                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8650                                getCompoundPaddingRight();
8651                        final float lineWidth = mLayout.getLineWidth(0);
8652                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8653                    case Gravity.RIGHT:
8654                        return 0.0f;
8655                    case Gravity.CENTER_HORIZONTAL:
8656                    case Gravity.FILL_HORIZONTAL:
8657                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8658                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8659                                getHorizontalFadingEdgeLength();
8660                }
8661            }
8662        }
8663        return super.getRightFadingEdgeStrength();
8664    }
8665
8666    @Override
8667    protected int computeHorizontalScrollRange() {
8668        if (mLayout != null) {
8669            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8670                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8671        }
8672
8673        return super.computeHorizontalScrollRange();
8674    }
8675
8676    @Override
8677    protected int computeVerticalScrollRange() {
8678        if (mLayout != null)
8679            return mLayout.getHeight();
8680
8681        return super.computeVerticalScrollRange();
8682    }
8683
8684    @Override
8685    protected int computeVerticalScrollExtent() {
8686        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8687    }
8688
8689    @Override
8690    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8691        super.findViewsWithText(outViews, searched, flags);
8692        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8693                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8694            String searchedLowerCase = searched.toString().toLowerCase();
8695            String textLowerCase = mText.toString().toLowerCase();
8696            if (textLowerCase.contains(searchedLowerCase)) {
8697                outViews.add(this);
8698            }
8699        }
8700    }
8701
8702    public enum BufferType {
8703        NORMAL, SPANNABLE, EDITABLE,
8704    }
8705
8706    /**
8707     * Returns the TextView_textColor attribute from the
8708     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8709     * from the TextView_textAppearance attribute, if TextView_textColor
8710     * was not set directly.
8711     */
8712    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8713        ColorStateList colors;
8714        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8715                                         TextView_textColor);
8716
8717        if (colors == null) {
8718            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8719                                         TextView_textAppearance, -1);
8720            if (ap != -1) {
8721                TypedArray appearance;
8722                appearance = context.obtainStyledAttributes(ap,
8723                                            com.android.internal.R.styleable.TextAppearance);
8724                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8725                                                  TextAppearance_textColor);
8726                appearance.recycle();
8727            }
8728        }
8729
8730        return colors;
8731    }
8732
8733    /**
8734     * Returns the default color from the TextView_textColor attribute
8735     * from the AttributeSet, if set, or the default color from the
8736     * TextAppearance_textColor from the TextView_textAppearance attribute,
8737     * if TextView_textColor was not set directly.
8738     */
8739    public static int getTextColor(Context context,
8740                                   TypedArray attrs,
8741                                   int def) {
8742        ColorStateList colors = getTextColors(context, attrs);
8743
8744        if (colors == null) {
8745            return def;
8746        } else {
8747            return colors.getDefaultColor();
8748        }
8749    }
8750
8751    @Override
8752    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8753        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8754        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8755            switch (keyCode) {
8756            case KeyEvent.KEYCODE_A:
8757                if (canSelectText()) {
8758                    return onTextContextMenuItem(ID_SELECT_ALL);
8759                }
8760                break;
8761            case KeyEvent.KEYCODE_X:
8762                if (canCut()) {
8763                    return onTextContextMenuItem(ID_CUT);
8764                }
8765                break;
8766            case KeyEvent.KEYCODE_C:
8767                if (canCopy()) {
8768                    return onTextContextMenuItem(ID_COPY);
8769                }
8770                break;
8771            case KeyEvent.KEYCODE_V:
8772                if (canPaste()) {
8773                    return onTextContextMenuItem(ID_PASTE);
8774                }
8775                break;
8776            }
8777        }
8778        return super.onKeyShortcut(keyCode, event);
8779    }
8780
8781    /**
8782     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8783     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8784     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8785     */
8786    private boolean canSelectText() {
8787        return hasSelectionController() && mText.length() != 0;
8788    }
8789
8790    /**
8791     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8792     * The text must be spannable and the movement method must allow for arbitary selection.
8793     *
8794     * See also {@link #canSelectText()}.
8795     */
8796    private boolean textCanBeSelected() {
8797        // prepareCursorController() relies on this method.
8798        // If you change this condition, make sure prepareCursorController is called anywhere
8799        // the value of this condition might be changed.
8800        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8801        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8802    }
8803
8804    private boolean canCut() {
8805        if (hasPasswordTransformationMethod()) {
8806            return false;
8807        }
8808
8809        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8810            return true;
8811        }
8812
8813        return false;
8814    }
8815
8816    private boolean canCopy() {
8817        if (hasPasswordTransformationMethod()) {
8818            return false;
8819        }
8820
8821        if (mText.length() > 0 && hasSelection()) {
8822            return true;
8823        }
8824
8825        return false;
8826    }
8827
8828    private boolean canPaste() {
8829        return (mText instanceof Editable &&
8830                mInput != null &&
8831                getSelectionStart() >= 0 &&
8832                getSelectionEnd() >= 0 &&
8833                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8834                hasPrimaryClip());
8835    }
8836
8837    private static long packRangeInLong(int start, int end) {
8838        return (((long) start) << 32) | end;
8839    }
8840
8841    private static int extractRangeStartFromLong(long range) {
8842        return (int) (range >>> 32);
8843    }
8844
8845    private static int extractRangeEndFromLong(long range) {
8846        return (int) (range & 0x00000000FFFFFFFFL);
8847    }
8848
8849    private boolean selectAll() {
8850        final int length = mText.length();
8851        Selection.setSelection((Spannable) mText, 0, length);
8852        return length > 0;
8853    }
8854
8855    /**
8856     * Adjusts selection to the word under last touch offset.
8857     * Return true if the operation was successfully performed.
8858     */
8859    private boolean selectCurrentWord() {
8860        if (!canSelectText()) {
8861            return false;
8862        }
8863
8864        if (hasPasswordTransformationMethod()) {
8865            // Always select all on a password field.
8866            // Cut/copy menu entries are not available for passwords, but being able to select all
8867            // is however useful to delete or paste to replace the entire content.
8868            return selectAll();
8869        }
8870
8871        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8872        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8873
8874        // Specific text field types: select the entire text for these
8875        if (klass == InputType.TYPE_CLASS_NUMBER ||
8876                klass == InputType.TYPE_CLASS_PHONE ||
8877                klass == InputType.TYPE_CLASS_DATETIME ||
8878                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8879                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8880                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8881                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8882            return selectAll();
8883        }
8884
8885        long lastTouchOffsets = getLastTouchOffsets();
8886        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8887        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8888
8889        // Safety check in case standard touch event handling has been bypassed
8890        if (minOffset < 0 || minOffset >= mText.length()) return false;
8891        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8892
8893        int selectionStart, selectionEnd;
8894
8895        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8896        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8897        if (urlSpans.length >= 1) {
8898            URLSpan urlSpan = urlSpans[0];
8899            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8900            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8901        } else {
8902            final WordIterator wordIterator = getWordIterator();
8903            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8904
8905            selectionStart = wordIterator.getBeginning(minOffset);
8906            if (selectionStart == BreakIterator.DONE) return false;
8907
8908            selectionEnd = wordIterator.getEnd(maxOffset);
8909            if (selectionEnd == BreakIterator.DONE) return false;
8910
8911            if (selectionStart == selectionEnd) {
8912                // Possible when the word iterator does not properly handle the text's language
8913                long range = getCharRange(selectionStart);
8914                selectionStart = extractRangeStartFromLong(range);
8915                selectionEnd = extractRangeEndFromLong(range);
8916            }
8917        }
8918
8919        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8920        return selectionEnd > selectionStart;
8921    }
8922
8923    /**
8924     * This is a temporary method. Future versions may support multi-locale text.
8925     *
8926     * @return The locale that should be used for a word iterator and a spell checker
8927     * in this TextView, based on the current spell checker settings,
8928     * the current IME's locale, or the system default locale.
8929     * @hide
8930     */
8931    public Locale getTextServicesLocale() {
8932        Locale locale = Locale.getDefault();
8933        final TextServicesManager textServicesManager = (TextServicesManager)
8934                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8935        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8936        if (subtype != null) {
8937            locale = new Locale(subtype.getLocale());
8938        }
8939        return locale;
8940    }
8941
8942    void onLocaleChanged() {
8943        // Will be re-created on demand in getWordIterator with the proper new locale
8944        mWordIterator = null;
8945    }
8946
8947    /**
8948     * @hide
8949     */
8950    public WordIterator getWordIterator() {
8951        if (mWordIterator == null) {
8952            mWordIterator = new WordIterator(getTextServicesLocale());
8953        }
8954        return mWordIterator;
8955    }
8956
8957    private long getCharRange(int offset) {
8958        final int textLength = mText.length();
8959        if (offset + 1 < textLength) {
8960            final char currentChar = mText.charAt(offset);
8961            final char nextChar = mText.charAt(offset + 1);
8962            if (Character.isSurrogatePair(currentChar, nextChar)) {
8963                return packRangeInLong(offset,  offset + 2);
8964            }
8965        }
8966        if (offset < textLength) {
8967            return packRangeInLong(offset,  offset + 1);
8968        }
8969        if (offset - 2 >= 0) {
8970            final char previousChar = mText.charAt(offset - 1);
8971            final char previousPreviousChar = mText.charAt(offset - 2);
8972            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8973                return packRangeInLong(offset - 2,  offset);
8974            }
8975        }
8976        if (offset - 1 >= 0) {
8977            return packRangeInLong(offset - 1,  offset);
8978        }
8979        return packRangeInLong(offset,  offset);
8980    }
8981
8982    private long getLastTouchOffsets() {
8983        SelectionModifierCursorController selectionController = getSelectionController();
8984        final int minOffset = selectionController.getMinTouchOffset();
8985        final int maxOffset = selectionController.getMaxTouchOffset();
8986        return packRangeInLong(minOffset, maxOffset);
8987    }
8988
8989    @Override
8990    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8991        super.onPopulateAccessibilityEvent(event);
8992
8993        final boolean isPassword = hasPasswordTransformationMethod();
8994        if (!isPassword) {
8995            CharSequence text = getTextForAccessibility();
8996            if (!TextUtils.isEmpty(text)) {
8997                event.getText().add(text);
8998            }
8999        }
9000    }
9001
9002    @Override
9003    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
9004        super.onInitializeAccessibilityEvent(event);
9005
9006        final boolean isPassword = hasPasswordTransformationMethod();
9007        event.setPassword(isPassword);
9008
9009        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9010            event.setFromIndex(Selection.getSelectionStart(mText));
9011            event.setToIndex(Selection.getSelectionEnd(mText));
9012            event.setItemCount(mText.length());
9013        }
9014    }
9015
9016    @Override
9017    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9018        super.onInitializeAccessibilityNodeInfo(info);
9019
9020        final boolean isPassword = hasPasswordTransformationMethod();
9021        if (!isPassword) {
9022            info.setText(getTextForAccessibility());
9023        }
9024        info.setPassword(isPassword);
9025    }
9026
9027    @Override
9028    public void sendAccessibilityEvent(int eventType) {
9029        // Do not send scroll events since first they are not interesting for
9030        // accessibility and second such events a generated too frequently.
9031        // For details see the implementation of bringTextIntoView().
9032        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9033            return;
9034        }
9035        super.sendAccessibilityEvent(eventType);
9036    }
9037
9038    /**
9039     * Gets the text reported for accessibility purposes. It is the
9040     * text if not empty or the hint.
9041     *
9042     * @return The accessibility text.
9043     */
9044    private CharSequence getTextForAccessibility() {
9045        CharSequence text = getText();
9046        if (TextUtils.isEmpty(text)) {
9047            text = getHint();
9048        }
9049        return text;
9050    }
9051
9052    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9053            int fromIndex, int removedCount, int addedCount) {
9054        AccessibilityEvent event =
9055            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9056        event.setFromIndex(fromIndex);
9057        event.setRemovedCount(removedCount);
9058        event.setAddedCount(addedCount);
9059        event.setBeforeText(beforeText);
9060        sendAccessibilityEventUnchecked(event);
9061    }
9062
9063    /**
9064     * Returns whether this text view is a current input method target.  The
9065     * default implementation just checks with {@link InputMethodManager}.
9066     */
9067    public boolean isInputMethodTarget() {
9068        InputMethodManager imm = InputMethodManager.peekInstance();
9069        return imm != null && imm.isActive(this);
9070    }
9071
9072    // Selection context mode
9073    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9074    private static final int ID_CUT = android.R.id.cut;
9075    private static final int ID_COPY = android.R.id.copy;
9076    private static final int ID_PASTE = android.R.id.paste;
9077
9078    /**
9079     * Called when a context menu option for the text view is selected.  Currently
9080     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9081     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9082     *
9083     * @return true if the context menu item action was performed.
9084     */
9085    public boolean onTextContextMenuItem(int id) {
9086        int min = 0;
9087        int max = mText.length();
9088
9089        if (isFocused()) {
9090            final int selStart = getSelectionStart();
9091            final int selEnd = getSelectionEnd();
9092
9093            min = Math.max(0, Math.min(selStart, selEnd));
9094            max = Math.max(0, Math.max(selStart, selEnd));
9095        }
9096
9097        switch (id) {
9098            case ID_SELECT_ALL:
9099                // This does not enter text selection mode. Text is highlighted, so that it can be
9100                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9101                selectAll();
9102                return true;
9103
9104            case ID_PASTE:
9105                paste(min, max);
9106                return true;
9107
9108            case ID_CUT:
9109                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9110                deleteText_internal(min, max);
9111                stopSelectionActionMode();
9112                return true;
9113
9114            case ID_COPY:
9115                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9116                stopSelectionActionMode();
9117                return true;
9118        }
9119        return false;
9120    }
9121
9122    private CharSequence getTransformedText(int start, int end) {
9123        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9124    }
9125
9126    /**
9127     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9128     * by [min, max] when replacing this region by paste.
9129     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9130     * make sure we do not add an extra one from the paste content.
9131     */
9132    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9133        if (paste.length() > 0) {
9134            if (min > 0) {
9135                final char charBefore = mTransformed.charAt(min - 1);
9136                final char charAfter = paste.charAt(0);
9137
9138                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9139                    // Two spaces at beginning of paste: remove one
9140                    final int originalLength = mText.length();
9141                    deleteText_internal(min - 1, min);
9142                    // Due to filters, there is no guarantee that exactly one character was
9143                    // removed: count instead.
9144                    final int delta = mText.length() - originalLength;
9145                    min += delta;
9146                    max += delta;
9147                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9148                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9149                    // No space at beginning of paste: add one
9150                    final int originalLength = mText.length();
9151                    replaceText_internal(min, min, " ");
9152                    // Taking possible filters into account as above.
9153                    final int delta = mText.length() - originalLength;
9154                    min += delta;
9155                    max += delta;
9156                }
9157            }
9158
9159            if (max < mText.length()) {
9160                final char charBefore = paste.charAt(paste.length() - 1);
9161                final char charAfter = mTransformed.charAt(max);
9162
9163                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9164                    // Two spaces at end of paste: remove one
9165                    deleteText_internal(max, max + 1);
9166                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9167                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9168                    // No space at end of paste: add one
9169                    replaceText_internal(max, max, " ");
9170                }
9171            }
9172        }
9173
9174        return packRangeInLong(min, max);
9175    }
9176
9177    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9178        TextView shadowView = (TextView) inflate(mContext,
9179                com.android.internal.R.layout.text_drag_thumbnail, null);
9180
9181        if (shadowView == null) {
9182            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9183        }
9184
9185        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9186            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9187        }
9188        shadowView.setText(text);
9189        shadowView.setTextColor(getTextColors());
9190
9191        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9192        shadowView.setGravity(Gravity.CENTER);
9193
9194        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9195                ViewGroup.LayoutParams.WRAP_CONTENT));
9196
9197        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9198        shadowView.measure(size, size);
9199
9200        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9201        shadowView.invalidate();
9202        return new DragShadowBuilder(shadowView);
9203    }
9204
9205    private static class DragLocalState {
9206        public TextView sourceTextView;
9207        public int start, end;
9208
9209        public DragLocalState(TextView sourceTextView, int start, int end) {
9210            this.sourceTextView = sourceTextView;
9211            this.start = start;
9212            this.end = end;
9213        }
9214    }
9215
9216    @Override
9217    public boolean performLongClick() {
9218        boolean handled = false;
9219        boolean vibrate = true;
9220
9221        if (super.performLongClick()) {
9222            mDiscardNextActionUp = true;
9223            handled = true;
9224        }
9225
9226        // Long press in empty space moves cursor and shows the Paste affordance if available.
9227        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9228                mInsertionControllerEnabled) {
9229            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9230            stopSelectionActionMode();
9231            Selection.setSelection((Spannable) mText, offset);
9232            getInsertionController().showWithActionPopup();
9233            handled = true;
9234            vibrate = false;
9235        }
9236
9237        if (!handled && mSelectionActionMode != null) {
9238            if (touchPositionIsInSelection()) {
9239                // Start a drag
9240                final int start = getSelectionStart();
9241                final int end = getSelectionEnd();
9242                CharSequence selectedText = getTransformedText(start, end);
9243                ClipData data = ClipData.newPlainText(null, selectedText);
9244                DragLocalState localState = new DragLocalState(this, start, end);
9245                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9246                stopSelectionActionMode();
9247            } else {
9248                getSelectionController().hide();
9249                selectCurrentWord();
9250                getSelectionController().show();
9251            }
9252            handled = true;
9253        }
9254
9255        // Start a new selection
9256        if (!handled) {
9257            vibrate = handled = startSelectionActionMode();
9258        }
9259
9260        if (vibrate) {
9261            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9262        }
9263
9264        if (handled) {
9265            mDiscardNextActionUp = true;
9266        }
9267
9268        return handled;
9269    }
9270
9271    private boolean touchPositionIsInSelection() {
9272        int selectionStart = getSelectionStart();
9273        int selectionEnd = getSelectionEnd();
9274
9275        if (selectionStart == selectionEnd) {
9276            return false;
9277        }
9278
9279        if (selectionStart > selectionEnd) {
9280            int tmp = selectionStart;
9281            selectionStart = selectionEnd;
9282            selectionEnd = tmp;
9283            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9284        }
9285
9286        SelectionModifierCursorController selectionController = getSelectionController();
9287        int minOffset = selectionController.getMinTouchOffset();
9288        int maxOffset = selectionController.getMaxTouchOffset();
9289
9290        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9291    }
9292
9293    private PositionListener getPositionListener() {
9294        if (mPositionListener == null) {
9295            mPositionListener = new PositionListener();
9296        }
9297        return mPositionListener;
9298    }
9299
9300    private interface TextViewPositionListener {
9301        public void updatePosition(int parentPositionX, int parentPositionY,
9302                boolean parentPositionChanged, boolean parentScrolled);
9303    }
9304
9305    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9306        // 3 handles
9307        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9308        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9309        private TextViewPositionListener[] mPositionListeners =
9310                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9311        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9312        private boolean mPositionHasChanged = true;
9313        // Absolute position of the TextView with respect to its parent window
9314        private int mPositionX, mPositionY;
9315        private int mNumberOfListeners;
9316        private boolean mScrollHasChanged;
9317
9318        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9319            if (mNumberOfListeners == 0) {
9320                updatePosition();
9321                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9322                vto.addOnPreDrawListener(this);
9323            }
9324
9325            int emptySlotIndex = -1;
9326            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9327                TextViewPositionListener listener = mPositionListeners[i];
9328                if (listener == positionListener) {
9329                    return;
9330                } else if (emptySlotIndex < 0 && listener == null) {
9331                    emptySlotIndex = i;
9332                }
9333            }
9334
9335            mPositionListeners[emptySlotIndex] = positionListener;
9336            mCanMove[emptySlotIndex] = canMove;
9337            mNumberOfListeners++;
9338        }
9339
9340        public void removeSubscriber(TextViewPositionListener positionListener) {
9341            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9342                if (mPositionListeners[i] == positionListener) {
9343                    mPositionListeners[i] = null;
9344                    mNumberOfListeners--;
9345                    break;
9346                }
9347            }
9348
9349            if (mNumberOfListeners == 0) {
9350                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9351                vto.removeOnPreDrawListener(this);
9352            }
9353        }
9354
9355        public int getPositionX() {
9356            return mPositionX;
9357        }
9358
9359        public int getPositionY() {
9360            return mPositionY;
9361        }
9362
9363        @Override
9364        public boolean onPreDraw() {
9365            updatePosition();
9366
9367            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9368                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9369                    TextViewPositionListener positionListener = mPositionListeners[i];
9370                    if (positionListener != null) {
9371                        positionListener.updatePosition(mPositionX, mPositionY,
9372                                mPositionHasChanged, mScrollHasChanged);
9373                    }
9374                }
9375            }
9376
9377            mScrollHasChanged = false;
9378            return true;
9379        }
9380
9381        private void updatePosition() {
9382            TextView.this.getLocationInWindow(mTempCoords);
9383
9384            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9385
9386            mPositionX = mTempCoords[0];
9387            mPositionY = mTempCoords[1];
9388        }
9389
9390        public void onScrollChanged() {
9391            mScrollHasChanged = true;
9392        }
9393    }
9394
9395    private boolean isPositionVisible(int positionX, int positionY) {
9396        synchronized (sTmpPosition) {
9397            final float[] position = sTmpPosition;
9398            position[0] = positionX;
9399            position[1] = positionY;
9400            View view = this;
9401
9402            while (view != null) {
9403                if (view != this) {
9404                    // Local scroll is already taken into account in positionX/Y
9405                    position[0] -= view.getScrollX();
9406                    position[1] -= view.getScrollY();
9407                }
9408
9409                if (position[0] < 0 || position[1] < 0 ||
9410                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
9411                    return false;
9412                }
9413
9414                if (!view.getMatrix().isIdentity()) {
9415                    view.getMatrix().mapPoints(position);
9416                }
9417
9418                position[0] += view.getLeft();
9419                position[1] += view.getTop();
9420
9421                final ViewParent parent = view.getParent();
9422                if (parent instanceof View) {
9423                    view = (View) parent;
9424                } else {
9425                    // We've reached the ViewRoot, stop iterating
9426                    view = null;
9427                }
9428            }
9429        }
9430
9431        // We've been able to walk up the view hierarchy and the position was never clipped
9432        return true;
9433    }
9434
9435    private boolean isOffsetVisible(int offset) {
9436        final int line = mLayout.getLineForOffset(offset);
9437        final int lineBottom = mLayout.getLineBottom(line);
9438        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9439        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9440                lineBottom + viewportToContentVerticalOffset());
9441    }
9442
9443    @Override
9444    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9445        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9446        if (mPositionListener != null) {
9447            mPositionListener.onScrollChanged();
9448        }
9449    }
9450
9451    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9452        protected PopupWindow mPopupWindow;
9453        protected ViewGroup mContentView;
9454        int mPositionX, mPositionY;
9455
9456        protected abstract void createPopupWindow();
9457        protected abstract void initContentView();
9458        protected abstract int getTextOffset();
9459        protected abstract int getVerticalLocalPosition(int line);
9460        protected abstract int clipVertically(int positionY);
9461
9462        public PinnedPopupWindow() {
9463            createPopupWindow();
9464
9465            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9466            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9467            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9468
9469            initContentView();
9470
9471            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9472                    ViewGroup.LayoutParams.WRAP_CONTENT);
9473            mContentView.setLayoutParams(wrapContent);
9474
9475            mPopupWindow.setContentView(mContentView);
9476        }
9477
9478        public void show() {
9479            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9480
9481            computeLocalPosition();
9482
9483            final PositionListener positionListener = TextView.this.getPositionListener();
9484            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9485        }
9486
9487        protected void measureContent() {
9488            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9489            mContentView.measure(
9490                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9491                            View.MeasureSpec.AT_MOST),
9492                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9493                            View.MeasureSpec.AT_MOST));
9494        }
9495
9496        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9497         * positioned according to viewportToContentHorizontalOffset.
9498         *
9499         * This method assumes that mContentView has properly been measured from its content. */
9500        private void computeLocalPosition() {
9501            measureContent();
9502            final int width = mContentView.getMeasuredWidth();
9503            final int offset = getTextOffset();
9504            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9505            mPositionX += viewportToContentHorizontalOffset();
9506
9507            final int line = mLayout.getLineForOffset(offset);
9508            mPositionY = getVerticalLocalPosition(line);
9509            mPositionY += viewportToContentVerticalOffset();
9510        }
9511
9512        private void updatePosition(int parentPositionX, int parentPositionY) {
9513            int positionX = parentPositionX + mPositionX;
9514            int positionY = parentPositionY + mPositionY;
9515
9516            positionY = clipVertically(positionY);
9517
9518            // Horizontal clipping
9519            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9520            final int width = mContentView.getMeasuredWidth();
9521            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9522            positionX = Math.max(0, positionX);
9523
9524            if (isShowing()) {
9525                mPopupWindow.update(positionX, positionY, -1, -1);
9526            } else {
9527                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9528                        positionX, positionY);
9529            }
9530        }
9531
9532        public void hide() {
9533            mPopupWindow.dismiss();
9534            TextView.this.getPositionListener().removeSubscriber(this);
9535        }
9536
9537        @Override
9538        public void updatePosition(int parentPositionX, int parentPositionY,
9539                boolean parentPositionChanged, boolean parentScrolled) {
9540            // Either parentPositionChanged or parentScrolled is true, check if still visible
9541            if (isShowing() && isOffsetVisible(getTextOffset())) {
9542                if (parentScrolled) computeLocalPosition();
9543                updatePosition(parentPositionX, parentPositionY);
9544            } else {
9545                hide();
9546            }
9547        }
9548
9549        public boolean isShowing() {
9550            return mPopupWindow.isShowing();
9551        }
9552    }
9553
9554    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9555        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9556        private static final int ADD_TO_DICTIONARY = -1;
9557        private static final int DELETE_TEXT = -2;
9558        private SuggestionInfo[] mSuggestionInfos;
9559        private int mNumberOfSuggestions;
9560        private boolean mCursorWasVisibleBeforeSuggestions;
9561        private boolean mIsShowingUp = false;
9562        private SuggestionAdapter mSuggestionsAdapter;
9563        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9564        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9565
9566        private class CustomPopupWindow extends PopupWindow {
9567            public CustomPopupWindow(Context context, int defStyle) {
9568                super(context, null, defStyle);
9569            }
9570
9571            @Override
9572            public void dismiss() {
9573                super.dismiss();
9574
9575                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9576
9577                // Safe cast since show() checks that mText is an Editable
9578                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9579
9580                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9581                if (hasInsertionController()) {
9582                    getInsertionController().show();
9583                }
9584            }
9585        }
9586
9587        public SuggestionsPopupWindow() {
9588            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9589            mSuggestionSpanComparator = new SuggestionSpanComparator();
9590            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9591        }
9592
9593        @Override
9594        protected void createPopupWindow() {
9595            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9596                com.android.internal.R.attr.textSuggestionsWindowStyle);
9597            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9598            mPopupWindow.setFocusable(true);
9599            mPopupWindow.setClippingEnabled(false);
9600        }
9601
9602        @Override
9603        protected void initContentView() {
9604            ListView listView = new ListView(TextView.this.getContext());
9605            mSuggestionsAdapter = new SuggestionAdapter();
9606            listView.setAdapter(mSuggestionsAdapter);
9607            listView.setOnItemClickListener(this);
9608            mContentView = listView;
9609
9610            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9611            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9612            for (int i = 0; i < mSuggestionInfos.length; i++) {
9613                mSuggestionInfos[i] = new SuggestionInfo();
9614            }
9615        }
9616
9617        public boolean isShowingUp() {
9618            return mIsShowingUp;
9619        }
9620
9621        public void onParentLostFocus() {
9622            mIsShowingUp = false;
9623        }
9624
9625        private class SuggestionInfo {
9626            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9627            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9628            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9629            SpannableStringBuilder text = new SpannableStringBuilder();
9630            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9631                    android.R.style.TextAppearance_SuggestionHighlight);
9632        }
9633
9634        private class SuggestionAdapter extends BaseAdapter {
9635            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9636                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9637
9638            @Override
9639            public int getCount() {
9640                return mNumberOfSuggestions;
9641            }
9642
9643            @Override
9644            public Object getItem(int position) {
9645                return mSuggestionInfos[position];
9646            }
9647
9648            @Override
9649            public long getItemId(int position) {
9650                return position;
9651            }
9652
9653            @Override
9654            public View getView(int position, View convertView, ViewGroup parent) {
9655                TextView textView = (TextView) convertView;
9656
9657                if (textView == null) {
9658                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9659                            false);
9660                }
9661
9662                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9663                textView.setText(suggestionInfo.text);
9664
9665                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9666                    textView.setCompoundDrawablesWithIntrinsicBounds(
9667                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9668                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9669                    textView.setCompoundDrawablesWithIntrinsicBounds(
9670                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9671                } else {
9672                    textView.setCompoundDrawables(null, null, null, null);
9673                }
9674
9675                return textView;
9676            }
9677        }
9678
9679        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9680            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9681                final int flag1 = span1.getFlags();
9682                final int flag2 = span2.getFlags();
9683                if (flag1 != flag2) {
9684                    // The order here should match what is used in updateDrawState
9685                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9686                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9687                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9688                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9689                    if (easy1 && !misspelled1) return -1;
9690                    if (easy2 && !misspelled2) return 1;
9691                    if (misspelled1) return -1;
9692                    if (misspelled2) return 1;
9693                }
9694
9695                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9696            }
9697        }
9698
9699        /**
9700         * Returns the suggestion spans that cover the current cursor position. The suggestion
9701         * spans are sorted according to the length of text that they are attached to.
9702         */
9703        private SuggestionSpan[] getSuggestionSpans() {
9704            int pos = TextView.this.getSelectionStart();
9705            Spannable spannable = (Spannable) TextView.this.mText;
9706            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9707
9708            mSpansLengths.clear();
9709            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9710                int start = spannable.getSpanStart(suggestionSpan);
9711                int end = spannable.getSpanEnd(suggestionSpan);
9712                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9713            }
9714
9715            // The suggestions are sorted according to their types (easy correction first, then
9716            // misspelled) and to the length of the text that they cover (shorter first).
9717            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9718            return suggestionSpans;
9719        }
9720
9721        @Override
9722        public void show() {
9723            if (!(mText instanceof Editable)) return;
9724
9725            updateSuggestions();
9726            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9727            setCursorVisible(false);
9728            mIsShowingUp = true;
9729            super.show();
9730        }
9731
9732        @Override
9733        protected void measureContent() {
9734            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9735            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9736                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9737            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9738                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9739
9740            int width = 0;
9741            View view = null;
9742            for (int i = 0; i < mNumberOfSuggestions; i++) {
9743                view = mSuggestionsAdapter.getView(i, view, mContentView);
9744                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9745                view.measure(horizontalMeasure, verticalMeasure);
9746                width = Math.max(width, view.getMeasuredWidth());
9747            }
9748
9749            // Enforce the width based on actual text widths
9750            mContentView.measure(
9751                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9752                    verticalMeasure);
9753
9754            Drawable popupBackground = mPopupWindow.getBackground();
9755            if (popupBackground != null) {
9756                if (mTempRect == null) mTempRect = new Rect();
9757                popupBackground.getPadding(mTempRect);
9758                width += mTempRect.left + mTempRect.right;
9759            }
9760            mPopupWindow.setWidth(width);
9761        }
9762
9763        @Override
9764        protected int getTextOffset() {
9765            return getSelectionStart();
9766        }
9767
9768        @Override
9769        protected int getVerticalLocalPosition(int line) {
9770            return mLayout.getLineBottom(line);
9771        }
9772
9773        @Override
9774        protected int clipVertically(int positionY) {
9775            final int height = mContentView.getMeasuredHeight();
9776            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9777            return Math.min(positionY, displayMetrics.heightPixels - height);
9778        }
9779
9780        @Override
9781        public void hide() {
9782            super.hide();
9783        }
9784
9785        private void updateSuggestions() {
9786            Spannable spannable = (Spannable) TextView.this.mText;
9787            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9788
9789            final int nbSpans = suggestionSpans.length;
9790
9791            mNumberOfSuggestions = 0;
9792            int spanUnionStart = mText.length();
9793            int spanUnionEnd = 0;
9794
9795            SuggestionSpan misspelledSpan = null;
9796            int underlineColor = 0;
9797
9798            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9799                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9800                final int spanStart = spannable.getSpanStart(suggestionSpan);
9801                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9802                spanUnionStart = Math.min(spanStart, spanUnionStart);
9803                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9804
9805                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9806                    misspelledSpan = suggestionSpan;
9807                }
9808
9809                // The first span dictates the background color of the highlighted text
9810                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9811
9812                String[] suggestions = suggestionSpan.getSuggestions();
9813                int nbSuggestions = suggestions.length;
9814                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9815                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9816                    suggestionInfo.suggestionSpan = suggestionSpan;
9817                    suggestionInfo.suggestionIndex = suggestionIndex;
9818                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9819                            suggestions[suggestionIndex]);
9820
9821                    mNumberOfSuggestions++;
9822                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9823                        // Also end outer for loop
9824                        spanIndex = nbSpans;
9825                        break;
9826                    }
9827                }
9828            }
9829
9830            for (int i = 0; i < mNumberOfSuggestions; i++) {
9831                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9832            }
9833
9834            // Add to dictionary item if there is a span with the misspelled flag
9835            if (misspelledSpan != null) {
9836                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9837                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9838                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9839                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9840                    suggestionInfo.suggestionSpan = misspelledSpan;
9841                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9842                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9843                            getContext().getString(com.android.internal.R.string.addToDictionary));
9844                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9845                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9846
9847                    mNumberOfSuggestions++;
9848                }
9849            }
9850
9851            // Delete item
9852            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9853            suggestionInfo.suggestionSpan = null;
9854            suggestionInfo.suggestionIndex = DELETE_TEXT;
9855            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9856                    getContext().getString(com.android.internal.R.string.deleteText));
9857            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9858                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9859            mNumberOfSuggestions++;
9860
9861            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9862            if (underlineColor == 0) {
9863                // Fallback on the default highlight color when the first span does not provide one
9864                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9865            } else {
9866                final float BACKGROUND_TRANSPARENCY = 0.4f;
9867                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9868                mSuggestionRangeSpan.setBackgroundColor(
9869                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9870            }
9871            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9872                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9873
9874            mSuggestionsAdapter.notifyDataSetChanged();
9875        }
9876
9877        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9878                int unionEnd) {
9879            final Spannable text = (Spannable) mText;
9880            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9881            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9882
9883            // Adjust the start/end of the suggestion span
9884            suggestionInfo.suggestionStart = spanStart - unionStart;
9885            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9886                    + suggestionInfo.text.length();
9887
9888            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9889                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9890
9891            // Add the text before and after the span.
9892            suggestionInfo.text.insert(0, mText.toString().substring(unionStart, spanStart));
9893            suggestionInfo.text.append(mText.toString().substring(spanEnd, unionEnd));
9894        }
9895
9896        @Override
9897        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9898            Editable editable = (Editable) mText;
9899            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9900
9901            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9902                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9903                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9904                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9905                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9906                    if (spanUnionEnd < editable.length() &&
9907                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9908                            (spanUnionStart == 0 ||
9909                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9910                        spanUnionEnd = spanUnionEnd + 1;
9911                    }
9912                    deleteText_internal(spanUnionStart, spanUnionEnd);
9913                }
9914                hide();
9915                return;
9916            }
9917
9918            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9919            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9920            if (spanStart < 0 || spanEnd <= spanStart) {
9921                // Span has been removed
9922                hide();
9923                return;
9924            }
9925            final String originalText = mText.toString().substring(spanStart, spanEnd);
9926
9927            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9928                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9929                intent.putExtra("word", originalText);
9930                intent.putExtra("locale", getTextServicesLocale().toString());
9931                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9932                getContext().startActivity(intent);
9933                // There is no way to know if the word was indeed added. Re-check.
9934                // TODO The ExtractEditText should remove the span in the original text instead
9935                editable.removeSpan(suggestionInfo.suggestionSpan);
9936                updateSpellCheckSpans(spanStart, spanEnd, false);
9937            } else {
9938                // SuggestionSpans are removed by replace: save them before
9939                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9940                        SuggestionSpan.class);
9941                final int length = suggestionSpans.length;
9942                int[] suggestionSpansStarts = new int[length];
9943                int[] suggestionSpansEnds = new int[length];
9944                int[] suggestionSpansFlags = new int[length];
9945                for (int i = 0; i < length; i++) {
9946                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
9947                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9948                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9949                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9950
9951                    // Remove potential misspelled flags
9952                    int suggestionSpanFlags = suggestionSpan.getFlags();
9953                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9954                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9955                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9956                        suggestionSpan.setFlags(suggestionSpanFlags);
9957                    }
9958                }
9959
9960                final int suggestionStart = suggestionInfo.suggestionStart;
9961                final int suggestionEnd = suggestionInfo.suggestionEnd;
9962                final String suggestion = suggestionInfo.text.subSequence(
9963                        suggestionStart, suggestionEnd).toString();
9964                replaceText_internal(spanStart, spanEnd, suggestion);
9965
9966                // Notify source IME of the suggestion pick. Do this before swaping texts.
9967                if (!TextUtils.isEmpty(
9968                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9969                    InputMethodManager imm = InputMethodManager.peekInstance();
9970                    if (imm != null) {
9971                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9972                                suggestionInfo.suggestionIndex);
9973                    }
9974                }
9975
9976                // Swap text content between actual text and Suggestion span
9977                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9978                suggestions[suggestionInfo.suggestionIndex] = originalText;
9979
9980                // Restore previous SuggestionSpans
9981                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9982                for (int i = 0; i < length; i++) {
9983                    // Only spans that include the modified region make sense after replacement
9984                    // Spans partially included in the replaced region are removed, there is no
9985                    // way to assign them a valid range after replacement
9986                    if (suggestionSpansStarts[i] <= spanStart &&
9987                            suggestionSpansEnds[i] >= spanEnd) {
9988                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
9989                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
9990                    }
9991                }
9992
9993                // Move cursor at the end of the replaced word
9994                final int newCursorPosition = spanEnd + lengthDifference;
9995                setCursorPosition_internal(newCursorPosition, newCursorPosition);
9996            }
9997
9998            hide();
9999        }
10000    }
10001
10002    /**
10003     * Removes the suggestion spans.
10004     */
10005    CharSequence removeSuggestionSpans(CharSequence text) {
10006       if (text instanceof Spanned) {
10007           Spannable spannable;
10008           if (text instanceof Spannable) {
10009               spannable = (Spannable) text;
10010           } else {
10011               spannable = new SpannableString(text);
10012               text = spannable;
10013           }
10014
10015           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10016           for (int i = 0; i < spans.length; i++) {
10017               spannable.removeSpan(spans[i]);
10018           }
10019       }
10020       return text;
10021    }
10022
10023    void showSuggestions() {
10024        if (mSuggestionsPopupWindow == null) {
10025            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10026        }
10027        hideControllers();
10028        mSuggestionsPopupWindow.show();
10029    }
10030
10031    boolean areSuggestionsShown() {
10032        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10033    }
10034
10035    /**
10036     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10037     * by the IME or by the spell checker as the user types. This is done by adding
10038     * {@link SuggestionSpan}s to the text.
10039     *
10040     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10041     * user asks for them on these parts of the text. This value depends on the inputType of this
10042     * TextView.
10043     *
10044     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10045     *
10046     * In addition, the type variation must be one of
10047     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10048     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10049     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10050     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10051     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10052     *
10053     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10054     *
10055     * @return true if the suggestions popup window is enabled, based on the inputType.
10056     */
10057    public boolean isSuggestionsEnabled() {
10058        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10059        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10060
10061        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10062        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10063                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10064                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10065                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10066                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10067    }
10068
10069    /**
10070     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10071     * selection is initiated in this View.
10072     *
10073     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10074     * Paste actions, depending on what this View supports.
10075     *
10076     * A custom implementation can add new entries in the default menu in its
10077     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10078     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10079     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10080     * or {@link android.R.id#paste} ids as parameters.
10081     *
10082     * Returning false from
10083     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10084     * the action mode from being started.
10085     *
10086     * Action click events should be handled by the custom implementation of
10087     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10088     *
10089     * Note that text selection mode is not started when a TextView receives focus and the
10090     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10091     * that case, to allow for quick replacement.
10092     */
10093    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10094        mCustomSelectionActionModeCallback = actionModeCallback;
10095    }
10096
10097    /**
10098     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10099     *
10100     * @return The current custom selection callback.
10101     */
10102    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10103        return mCustomSelectionActionModeCallback;
10104    }
10105
10106    /**
10107     *
10108     * @return true if the selection mode was actually started.
10109     */
10110    private boolean startSelectionActionMode() {
10111        if (mSelectionActionMode != null) {
10112            // Selection action mode is already started
10113            return false;
10114        }
10115
10116        if (!canSelectText() || !requestFocus()) {
10117            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10118            return false;
10119        }
10120
10121        if (!hasSelection()) {
10122            // There may already be a selection on device rotation
10123            if (!selectCurrentWord()) {
10124                // No word found under cursor or text selection not permitted.
10125                return false;
10126            }
10127        }
10128
10129        boolean willExtract = extractedTextModeWillBeStarted();
10130
10131        // Do not start the action mode when extracted text will show up full screen, thus
10132        // immediately hiding the newly created action bar, which would be visually distracting.
10133        if (!willExtract) {
10134            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10135            mSelectionActionMode = startActionMode(actionModeCallback);
10136        }
10137
10138        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10139        if (selectionStarted && !mTextIsSelectable && mSoftInputShownOnFocus) {
10140            // Show the IME to be able to replace text, except when selecting non editable text.
10141            final InputMethodManager imm = InputMethodManager.peekInstance();
10142            if (imm != null) {
10143                imm.showSoftInput(this, 0, null);
10144            }
10145        }
10146
10147        return selectionStarted;
10148    }
10149
10150    private boolean extractedTextModeWillBeStarted() {
10151        if (!(this instanceof ExtractEditText)) {
10152            final InputMethodManager imm = InputMethodManager.peekInstance();
10153            return  imm != null && imm.isFullscreenMode();
10154        }
10155        return false;
10156    }
10157
10158    private void stopSelectionActionMode() {
10159        if (mSelectionActionMode != null) {
10160            // This will hide the mSelectionModifierCursorController
10161            mSelectionActionMode.finish();
10162        }
10163    }
10164
10165    /**
10166     * Paste clipboard content between min and max positions.
10167     */
10168    private void paste(int min, int max) {
10169        ClipboardManager clipboard =
10170            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10171        ClipData clip = clipboard.getPrimaryClip();
10172        if (clip != null) {
10173            boolean didFirst = false;
10174            for (int i=0; i<clip.getItemCount(); i++) {
10175                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10176                if (paste != null) {
10177                    if (!didFirst) {
10178                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10179                        min = extractRangeStartFromLong(minMax);
10180                        max = extractRangeEndFromLong(minMax);
10181                        Selection.setSelection((Spannable) mText, max);
10182                        ((Editable) mText).replace(min, max, paste);
10183                        didFirst = true;
10184                    } else {
10185                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10186                        ((Editable) mText).insert(getSelectionEnd(), paste);
10187                    }
10188                }
10189            }
10190            stopSelectionActionMode();
10191            sLastCutOrCopyTime = 0;
10192        }
10193    }
10194
10195    private void setPrimaryClip(ClipData clip) {
10196        ClipboardManager clipboard = (ClipboardManager) getContext().
10197                getSystemService(Context.CLIPBOARD_SERVICE);
10198        clipboard.setPrimaryClip(clip);
10199        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10200    }
10201
10202    /**
10203     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10204     *
10205     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10206     * on which of these this TextView supports.
10207     */
10208    private class SelectionActionModeCallback implements ActionMode.Callback {
10209
10210        @Override
10211        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10212            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10213                    com.android.internal.R.styleable.SelectionModeDrawables);
10214
10215            boolean allowText = getContext().getResources().getBoolean(
10216                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10217
10218            mode.setTitle(allowText ?
10219                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10220            mode.setSubtitle(null);
10221
10222            int selectAllIconId = 0; // No icon by default
10223            if (!allowText) {
10224                // Provide an icon, text will not be displayed on smaller screens.
10225                selectAllIconId = styledAttributes.getResourceId(
10226                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10227            }
10228
10229            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10230                    setIcon(selectAllIconId).
10231                    setAlphabeticShortcut('a').
10232                    setShowAsAction(
10233                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10234
10235            if (canCut()) {
10236                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10237                    setIcon(styledAttributes.getResourceId(
10238                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10239                    setAlphabeticShortcut('x').
10240                    setShowAsAction(
10241                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10242            }
10243
10244            if (canCopy()) {
10245                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10246                    setIcon(styledAttributes.getResourceId(
10247                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10248                    setAlphabeticShortcut('c').
10249                    setShowAsAction(
10250                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10251            }
10252
10253            if (canPaste()) {
10254                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10255                        setIcon(styledAttributes.getResourceId(
10256                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10257                        setAlphabeticShortcut('v').
10258                        setShowAsAction(
10259                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10260            }
10261
10262            styledAttributes.recycle();
10263
10264            if (mCustomSelectionActionModeCallback != null) {
10265                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10266                    // The custom mode can choose to cancel the action mode
10267                    return false;
10268                }
10269            }
10270
10271            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10272                getSelectionController().show();
10273                return true;
10274            } else {
10275                return false;
10276            }
10277        }
10278
10279        @Override
10280        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10281            if (mCustomSelectionActionModeCallback != null) {
10282                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10283            }
10284            return true;
10285        }
10286
10287        @Override
10288        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10289            if (mCustomSelectionActionModeCallback != null &&
10290                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10291                return true;
10292            }
10293            return onTextContextMenuItem(item.getItemId());
10294        }
10295
10296        @Override
10297        public void onDestroyActionMode(ActionMode mode) {
10298            if (mCustomSelectionActionModeCallback != null) {
10299                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10300            }
10301            Selection.setSelection((Spannable) mText, getSelectionEnd());
10302
10303            if (mSelectionModifierCursorController != null) {
10304                mSelectionModifierCursorController.hide();
10305            }
10306
10307            mSelectionActionMode = null;
10308        }
10309    }
10310
10311    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10312        private static final int POPUP_TEXT_LAYOUT =
10313                com.android.internal.R.layout.text_edit_action_popup_text;
10314        private TextView mPasteTextView;
10315        private TextView mReplaceTextView;
10316
10317        @Override
10318        protected void createPopupWindow() {
10319            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10320                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10321            mPopupWindow.setClippingEnabled(true);
10322        }
10323
10324        @Override
10325        protected void initContentView() {
10326            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10327            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10328            mContentView = linearLayout;
10329            mContentView.setBackgroundResource(
10330                    com.android.internal.R.drawable.text_edit_paste_window);
10331
10332            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10333                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10334
10335            LayoutParams wrapContent = new LayoutParams(
10336                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10337
10338            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10339            mPasteTextView.setLayoutParams(wrapContent);
10340            mContentView.addView(mPasteTextView);
10341            mPasteTextView.setText(com.android.internal.R.string.paste);
10342            mPasteTextView.setOnClickListener(this);
10343
10344            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10345            mReplaceTextView.setLayoutParams(wrapContent);
10346            mContentView.addView(mReplaceTextView);
10347            mReplaceTextView.setText(com.android.internal.R.string.replace);
10348            mReplaceTextView.setOnClickListener(this);
10349        }
10350
10351        @Override
10352        public void show() {
10353            boolean canPaste = canPaste();
10354            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10355            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10356            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10357
10358            if (!canPaste && !canSuggest) return;
10359
10360            super.show();
10361        }
10362
10363        @Override
10364        public void onClick(View view) {
10365            if (view == mPasteTextView && canPaste()) {
10366                onTextContextMenuItem(ID_PASTE);
10367                hide();
10368            } else if (view == mReplaceTextView) {
10369                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10370                stopSelectionActionMode();
10371                Selection.setSelection((Spannable) mText, middle);
10372                showSuggestions();
10373            }
10374        }
10375
10376        @Override
10377        protected int getTextOffset() {
10378            return (getSelectionStart() + getSelectionEnd()) / 2;
10379        }
10380
10381        @Override
10382        protected int getVerticalLocalPosition(int line) {
10383            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10384        }
10385
10386        @Override
10387        protected int clipVertically(int positionY) {
10388            if (positionY < 0) {
10389                final int offset = getTextOffset();
10390                final int line = mLayout.getLineForOffset(offset);
10391                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10392                positionY += mContentView.getMeasuredHeight();
10393
10394                // Assumes insertion and selection handles share the same height
10395                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10396                positionY += handle.getIntrinsicHeight();
10397            }
10398
10399            return positionY;
10400        }
10401    }
10402
10403    private abstract class HandleView extends View implements TextViewPositionListener {
10404        protected Drawable mDrawable;
10405        protected Drawable mDrawableLtr;
10406        protected Drawable mDrawableRtl;
10407        private final PopupWindow mContainer;
10408        // Position with respect to the parent TextView
10409        private int mPositionX, mPositionY;
10410        private boolean mIsDragging;
10411        // Offset from touch position to mPosition
10412        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10413        protected int mHotspotX;
10414        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10415        private float mTouchOffsetY;
10416        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10417        private float mIdealVerticalOffset;
10418        // Parent's (TextView) previous position in window
10419        private int mLastParentX, mLastParentY;
10420        // Transient action popup window for Paste and Replace actions
10421        protected ActionPopupWindow mActionPopupWindow;
10422        // Previous text character offset
10423        private int mPreviousOffset = -1;
10424        // Previous text character offset
10425        private boolean mPositionHasChanged = true;
10426        // Used to delay the appearance of the action popup window
10427        private Runnable mActionPopupShower;
10428
10429        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10430            super(TextView.this.mContext);
10431            mContainer = new PopupWindow(TextView.this.mContext, null,
10432                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10433            mContainer.setSplitTouchEnabled(true);
10434            mContainer.setClippingEnabled(false);
10435            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10436            mContainer.setContentView(this);
10437
10438            mDrawableLtr = drawableLtr;
10439            mDrawableRtl = drawableRtl;
10440
10441            updateDrawable();
10442
10443            final int handleHeight = mDrawable.getIntrinsicHeight();
10444            mTouchOffsetY = -0.3f * handleHeight;
10445            mIdealVerticalOffset = 0.7f * handleHeight;
10446        }
10447
10448        protected void updateDrawable() {
10449            final int offset = getCurrentCursorOffset();
10450            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10451            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10452            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10453        }
10454
10455        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10456
10457        // Touch-up filter: number of previous positions remembered
10458        private static final int HISTORY_SIZE = 5;
10459        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10460        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10461        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10462        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10463        private int mPreviousOffsetIndex = 0;
10464        private int mNumberPreviousOffsets = 0;
10465
10466        private void startTouchUpFilter(int offset) {
10467            mNumberPreviousOffsets = 0;
10468            addPositionToTouchUpFilter(offset);
10469        }
10470
10471        private void addPositionToTouchUpFilter(int offset) {
10472            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10473            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10474            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10475            mNumberPreviousOffsets++;
10476        }
10477
10478        private void filterOnTouchUp() {
10479            final long now = SystemClock.uptimeMillis();
10480            int i = 0;
10481            int index = mPreviousOffsetIndex;
10482            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10483            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10484                i++;
10485                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10486            }
10487
10488            if (i > 0 && i < iMax &&
10489                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10490                positionAtCursorOffset(mPreviousOffsets[index], false);
10491            }
10492        }
10493
10494        public boolean offsetHasBeenChanged() {
10495            return mNumberPreviousOffsets > 1;
10496        }
10497
10498        @Override
10499        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10500            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10501        }
10502
10503        public void show() {
10504            if (isShowing()) return;
10505
10506            getPositionListener().addSubscriber(this, true /* local position may change */);
10507
10508            // Make sure the offset is always considered new, even when focusing at same position
10509            mPreviousOffset = -1;
10510            positionAtCursorOffset(getCurrentCursorOffset(), false);
10511
10512            hideActionPopupWindow();
10513        }
10514
10515        protected void dismiss() {
10516            mIsDragging = false;
10517            mContainer.dismiss();
10518            onDetached();
10519        }
10520
10521        public void hide() {
10522            dismiss();
10523
10524            TextView.this.getPositionListener().removeSubscriber(this);
10525        }
10526
10527        void showActionPopupWindow(int delay) {
10528            if (mActionPopupWindow == null) {
10529                mActionPopupWindow = new ActionPopupWindow();
10530            }
10531            if (mActionPopupShower == null) {
10532                mActionPopupShower = new Runnable() {
10533                    public void run() {
10534                        mActionPopupWindow.show();
10535                    }
10536                };
10537            } else {
10538                TextView.this.removeCallbacks(mActionPopupShower);
10539            }
10540            TextView.this.postDelayed(mActionPopupShower, delay);
10541        }
10542
10543        protected void hideActionPopupWindow() {
10544            if (mActionPopupShower != null) {
10545                TextView.this.removeCallbacks(mActionPopupShower);
10546            }
10547            if (mActionPopupWindow != null) {
10548                mActionPopupWindow.hide();
10549            }
10550        }
10551
10552        public boolean isShowing() {
10553            return mContainer.isShowing();
10554        }
10555
10556        private boolean isVisible() {
10557            // Always show a dragging handle.
10558            if (mIsDragging) {
10559                return true;
10560            }
10561
10562            if (isInBatchEditMode()) {
10563                return false;
10564            }
10565
10566            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10567        }
10568
10569        public abstract int getCurrentCursorOffset();
10570
10571        protected abstract void updateSelection(int offset);
10572
10573        public abstract void updatePosition(float x, float y);
10574
10575        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10576            // A HandleView relies on the layout, which may be nulled by external methods
10577            if (mLayout == null) {
10578                // Will update controllers' state, hiding them and stopping selection mode if needed
10579                prepareCursorControllers();
10580                return;
10581            }
10582
10583            if (offset != mPreviousOffset || parentScrolled) {
10584                updateSelection(offset);
10585                addPositionToTouchUpFilter(offset);
10586                final int line = mLayout.getLineForOffset(offset);
10587
10588                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10589                mPositionY = mLayout.getLineBottom(line);
10590
10591                // Take TextView's padding and scroll into account.
10592                mPositionX += viewportToContentHorizontalOffset();
10593                mPositionY += viewportToContentVerticalOffset();
10594
10595                mPreviousOffset = offset;
10596                mPositionHasChanged = true;
10597            }
10598        }
10599
10600        public void updatePosition(int parentPositionX, int parentPositionY,
10601                boolean parentPositionChanged, boolean parentScrolled) {
10602            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10603            if (parentPositionChanged || mPositionHasChanged) {
10604                if (mIsDragging) {
10605                    // Update touchToWindow offset in case of parent scrolling while dragging
10606                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10607                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10608                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10609                        mLastParentX = parentPositionX;
10610                        mLastParentY = parentPositionY;
10611                    }
10612
10613                    onHandleMoved();
10614                }
10615
10616                if (isVisible()) {
10617                    final int positionX = parentPositionX + mPositionX;
10618                    final int positionY = parentPositionY + mPositionY;
10619                    if (isShowing()) {
10620                        mContainer.update(positionX, positionY, -1, -1);
10621                    } else {
10622                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10623                                positionX, positionY);
10624                    }
10625                } else {
10626                    if (isShowing()) {
10627                        dismiss();
10628                    }
10629                }
10630
10631                mPositionHasChanged = false;
10632            }
10633        }
10634
10635        @Override
10636        protected void onDraw(Canvas c) {
10637            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10638            mDrawable.draw(c);
10639        }
10640
10641        @Override
10642        public boolean onTouchEvent(MotionEvent ev) {
10643            switch (ev.getActionMasked()) {
10644                case MotionEvent.ACTION_DOWN: {
10645                    startTouchUpFilter(getCurrentCursorOffset());
10646                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10647                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10648
10649                    final PositionListener positionListener = getPositionListener();
10650                    mLastParentX = positionListener.getPositionX();
10651                    mLastParentY = positionListener.getPositionY();
10652                    mIsDragging = true;
10653                    break;
10654                }
10655
10656                case MotionEvent.ACTION_MOVE: {
10657                    final float rawX = ev.getRawX();
10658                    final float rawY = ev.getRawY();
10659
10660                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10661                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10662                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10663                    float newVerticalOffset;
10664                    if (previousVerticalOffset < mIdealVerticalOffset) {
10665                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10666                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10667                    } else {
10668                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10669                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10670                    }
10671                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10672
10673                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10674                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10675
10676                    updatePosition(newPosX, newPosY);
10677                    break;
10678                }
10679
10680                case MotionEvent.ACTION_UP:
10681                    filterOnTouchUp();
10682                    mIsDragging = false;
10683                    break;
10684
10685                case MotionEvent.ACTION_CANCEL:
10686                    mIsDragging = false;
10687                    break;
10688            }
10689            return true;
10690        }
10691
10692        public boolean isDragging() {
10693            return mIsDragging;
10694        }
10695
10696        void onHandleMoved() {
10697            hideActionPopupWindow();
10698        }
10699
10700        public void onDetached() {
10701            hideActionPopupWindow();
10702        }
10703    }
10704
10705    private class InsertionHandleView extends HandleView {
10706        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10707        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10708
10709        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10710        private float mDownPositionX, mDownPositionY;
10711        private Runnable mHider;
10712
10713        public InsertionHandleView(Drawable drawable) {
10714            super(drawable, drawable);
10715        }
10716
10717        @Override
10718        public void show() {
10719            super.show();
10720
10721            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10722            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10723                showActionPopupWindow(0);
10724            }
10725
10726            hideAfterDelay();
10727        }
10728
10729        public void showWithActionPopup() {
10730            show();
10731            showActionPopupWindow(0);
10732        }
10733
10734        private void hideAfterDelay() {
10735            removeHiderCallback();
10736            if (mHider == null) {
10737                mHider = new Runnable() {
10738                    public void run() {
10739                        hide();
10740                    }
10741                };
10742            }
10743            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10744        }
10745
10746        private void removeHiderCallback() {
10747            if (mHider != null) {
10748                TextView.this.removeCallbacks(mHider);
10749            }
10750        }
10751
10752        @Override
10753        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10754            return drawable.getIntrinsicWidth() / 2;
10755        }
10756
10757        @Override
10758        public boolean onTouchEvent(MotionEvent ev) {
10759            final boolean result = super.onTouchEvent(ev);
10760
10761            switch (ev.getActionMasked()) {
10762                case MotionEvent.ACTION_DOWN:
10763                    mDownPositionX = ev.getRawX();
10764                    mDownPositionY = ev.getRawY();
10765                    break;
10766
10767                case MotionEvent.ACTION_UP:
10768                    if (!offsetHasBeenChanged()) {
10769                        final float deltaX = mDownPositionX - ev.getRawX();
10770                        final float deltaY = mDownPositionY - ev.getRawY();
10771                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10772                        if (distanceSquared < mSquaredTouchSlopDistance) {
10773                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10774                                // Tapping on the handle dismisses the displayed action popup
10775                                mActionPopupWindow.hide();
10776                            } else {
10777                                showWithActionPopup();
10778                            }
10779                        }
10780                    }
10781                    hideAfterDelay();
10782                    break;
10783
10784                case MotionEvent.ACTION_CANCEL:
10785                    hideAfterDelay();
10786                    break;
10787
10788                default:
10789                    break;
10790            }
10791
10792            return result;
10793        }
10794
10795        @Override
10796        public int getCurrentCursorOffset() {
10797            return TextView.this.getSelectionStart();
10798        }
10799
10800        @Override
10801        public void updateSelection(int offset) {
10802            Selection.setSelection((Spannable) mText, offset);
10803        }
10804
10805        @Override
10806        public void updatePosition(float x, float y) {
10807            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10808        }
10809
10810        @Override
10811        void onHandleMoved() {
10812            super.onHandleMoved();
10813            removeHiderCallback();
10814        }
10815
10816        @Override
10817        public void onDetached() {
10818            super.onDetached();
10819            removeHiderCallback();
10820        }
10821    }
10822
10823    private class SelectionStartHandleView extends HandleView {
10824
10825        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10826            super(drawableLtr, drawableRtl);
10827        }
10828
10829        @Override
10830        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10831            if (isRtlRun) {
10832                return drawable.getIntrinsicWidth() / 4;
10833            } else {
10834                return (drawable.getIntrinsicWidth() * 3) / 4;
10835            }
10836        }
10837
10838        @Override
10839        public int getCurrentCursorOffset() {
10840            return TextView.this.getSelectionStart();
10841        }
10842
10843        @Override
10844        public void updateSelection(int offset) {
10845            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10846            updateDrawable();
10847        }
10848
10849        @Override
10850        public void updatePosition(float x, float y) {
10851            int offset = getOffsetForPosition(x, y);
10852
10853            // Handles can not cross and selection is at least one character
10854            final int selectionEnd = getSelectionEnd();
10855            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10856
10857            positionAtCursorOffset(offset, false);
10858        }
10859
10860        public ActionPopupWindow getActionPopupWindow() {
10861            return mActionPopupWindow;
10862        }
10863    }
10864
10865    private class SelectionEndHandleView extends HandleView {
10866
10867        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10868            super(drawableLtr, drawableRtl);
10869        }
10870
10871        @Override
10872        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10873            if (isRtlRun) {
10874                return (drawable.getIntrinsicWidth() * 3) / 4;
10875            } else {
10876                return drawable.getIntrinsicWidth() / 4;
10877            }
10878        }
10879
10880        @Override
10881        public int getCurrentCursorOffset() {
10882            return TextView.this.getSelectionEnd();
10883        }
10884
10885        @Override
10886        public void updateSelection(int offset) {
10887            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10888            updateDrawable();
10889        }
10890
10891        @Override
10892        public void updatePosition(float x, float y) {
10893            int offset = getOffsetForPosition(x, y);
10894
10895            // Handles can not cross and selection is at least one character
10896            final int selectionStart = getSelectionStart();
10897            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10898
10899            positionAtCursorOffset(offset, false);
10900        }
10901
10902        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10903            mActionPopupWindow = actionPopupWindow;
10904        }
10905    }
10906
10907    /**
10908     * A CursorController instance can be used to control a cursor in the text.
10909     * It is not used outside of {@link TextView}.
10910     * @hide
10911     */
10912    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10913        /**
10914         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10915         * See also {@link #hide()}.
10916         */
10917        public void show();
10918
10919        /**
10920         * Hide the cursor controller from screen.
10921         * See also {@link #show()}.
10922         */
10923        public void hide();
10924
10925        /**
10926         * Called when the view is detached from window. Perform house keeping task, such as
10927         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10928         * preventing the activity from being recycled.
10929         */
10930        public void onDetached();
10931    }
10932
10933    private class InsertionPointCursorController implements CursorController {
10934        private InsertionHandleView mHandle;
10935
10936        public void show() {
10937            getHandle().show();
10938        }
10939
10940        public void showWithActionPopup() {
10941            getHandle().showWithActionPopup();
10942        }
10943
10944        public void hide() {
10945            if (mHandle != null) {
10946                mHandle.hide();
10947            }
10948        }
10949
10950        public void onTouchModeChanged(boolean isInTouchMode) {
10951            if (!isInTouchMode) {
10952                hide();
10953            }
10954        }
10955
10956        private InsertionHandleView getHandle() {
10957            if (mSelectHandleCenter == null) {
10958                mSelectHandleCenter = mContext.getResources().getDrawable(
10959                        mTextSelectHandleRes);
10960            }
10961            if (mHandle == null) {
10962                mHandle = new InsertionHandleView(mSelectHandleCenter);
10963            }
10964            return mHandle;
10965        }
10966
10967        @Override
10968        public void onDetached() {
10969            final ViewTreeObserver observer = getViewTreeObserver();
10970            observer.removeOnTouchModeChangeListener(this);
10971
10972            if (mHandle != null) mHandle.onDetached();
10973        }
10974    }
10975
10976    private class SelectionModifierCursorController implements CursorController {
10977        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
10978        // The cursor controller handles, lazily created when shown.
10979        private SelectionStartHandleView mStartHandle;
10980        private SelectionEndHandleView mEndHandle;
10981        // The offsets of that last touch down event. Remembered to start selection there.
10982        private int mMinTouchOffset, mMaxTouchOffset;
10983
10984        // Double tap detection
10985        private long mPreviousTapUpTime = 0;
10986        private float mPreviousTapPositionX, mPreviousTapPositionY;
10987
10988        SelectionModifierCursorController() {
10989            resetTouchOffsets();
10990        }
10991
10992        public void show() {
10993            if (isInBatchEditMode()) {
10994                return;
10995            }
10996            initDrawables();
10997            initHandles();
10998            hideInsertionPointCursorController();
10999        }
11000
11001        private void initDrawables() {
11002            if (mSelectHandleLeft == null) {
11003                mSelectHandleLeft = mContext.getResources().getDrawable(
11004                        mTextSelectHandleLeftRes);
11005            }
11006            if (mSelectHandleRight == null) {
11007                mSelectHandleRight = mContext.getResources().getDrawable(
11008                        mTextSelectHandleRightRes);
11009            }
11010        }
11011
11012        private void initHandles() {
11013            // Lazy object creation has to be done before updatePosition() is called.
11014            if (mStartHandle == null) {
11015                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11016            }
11017            if (mEndHandle == null) {
11018                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11019            }
11020
11021            mStartHandle.show();
11022            mEndHandle.show();
11023
11024            // Make sure both left and right handles share the same ActionPopupWindow (so that
11025            // moving any of the handles hides the action popup).
11026            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11027            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11028
11029            hideInsertionPointCursorController();
11030        }
11031
11032        public void hide() {
11033            if (mStartHandle != null) mStartHandle.hide();
11034            if (mEndHandle != null) mEndHandle.hide();
11035        }
11036
11037        public void onTouchEvent(MotionEvent event) {
11038            // This is done even when the View does not have focus, so that long presses can start
11039            // selection and tap can move cursor from this tap position.
11040            switch (event.getActionMasked()) {
11041                case MotionEvent.ACTION_DOWN:
11042                    final float x = event.getX();
11043                    final float y = event.getY();
11044
11045                    // Remember finger down position, to be able to start selection from there
11046                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11047
11048                    // Double tap detection
11049                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11050                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11051                            isPositionOnText(x, y)) {
11052                        final float deltaX = x - mPreviousTapPositionX;
11053                        final float deltaY = y - mPreviousTapPositionY;
11054                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11055                        if (distanceSquared < mSquaredTouchSlopDistance) {
11056                            startSelectionActionMode();
11057                            mDiscardNextActionUp = true;
11058                        }
11059                    }
11060
11061                    mPreviousTapPositionX = x;
11062                    mPreviousTapPositionY = y;
11063                    break;
11064
11065                case MotionEvent.ACTION_POINTER_DOWN:
11066                case MotionEvent.ACTION_POINTER_UP:
11067                    // Handle multi-point gestures. Keep min and max offset positions.
11068                    // Only activated for devices that correctly handle multi-touch.
11069                    if (mContext.getPackageManager().hasSystemFeature(
11070                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11071                        updateMinAndMaxOffsets(event);
11072                    }
11073                    break;
11074
11075                case MotionEvent.ACTION_UP:
11076                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11077                    break;
11078            }
11079        }
11080
11081        /**
11082         * @param event
11083         */
11084        private void updateMinAndMaxOffsets(MotionEvent event) {
11085            int pointerCount = event.getPointerCount();
11086            for (int index = 0; index < pointerCount; index++) {
11087                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11088                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11089                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11090            }
11091        }
11092
11093        public int getMinTouchOffset() {
11094            return mMinTouchOffset;
11095        }
11096
11097        public int getMaxTouchOffset() {
11098            return mMaxTouchOffset;
11099        }
11100
11101        public void resetTouchOffsets() {
11102            mMinTouchOffset = mMaxTouchOffset = -1;
11103        }
11104
11105        /**
11106         * @return true iff this controller is currently used to move the selection start.
11107         */
11108        public boolean isSelectionStartDragged() {
11109            return mStartHandle != null && mStartHandle.isDragging();
11110        }
11111
11112        public void onTouchModeChanged(boolean isInTouchMode) {
11113            if (!isInTouchMode) {
11114                hide();
11115            }
11116        }
11117
11118        @Override
11119        public void onDetached() {
11120            final ViewTreeObserver observer = getViewTreeObserver();
11121            observer.removeOnTouchModeChangeListener(this);
11122
11123            if (mStartHandle != null) mStartHandle.onDetached();
11124            if (mEndHandle != null) mEndHandle.onDetached();
11125        }
11126    }
11127
11128    private void hideInsertionPointCursorController() {
11129        // No need to create the controller to hide it.
11130        if (mInsertionPointCursorController != null) {
11131            mInsertionPointCursorController.hide();
11132        }
11133    }
11134
11135    /**
11136     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11137     */
11138    private void hideControllers() {
11139        hideCursorControllers();
11140        hideSpanControllers();
11141    }
11142
11143    private void hideSpanControllers() {
11144        if (mChangeWatcher != null) {
11145            mChangeWatcher.hideControllers();
11146        }
11147    }
11148
11149    private void hideCursorControllers() {
11150        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11151            // Should be done before hide insertion point controller since it triggers a show of it
11152            mSuggestionsPopupWindow.hide();
11153        }
11154        hideInsertionPointCursorController();
11155        stopSelectionActionMode();
11156    }
11157
11158    /**
11159     * Get the character offset closest to the specified absolute position. A typical use case is to
11160     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11161     *
11162     * @param x The horizontal absolute position of a point on screen
11163     * @param y The vertical absolute position of a point on screen
11164     * @return the character offset for the character whose position is closest to the specified
11165     *  position. Returns -1 if there is no layout.
11166     */
11167    public int getOffsetForPosition(float x, float y) {
11168        if (getLayout() == null) return -1;
11169        final int line = getLineAtCoordinate(y);
11170        final int offset = getOffsetAtCoordinate(line, x);
11171        return offset;
11172    }
11173
11174    private float convertToLocalHorizontalCoordinate(float x) {
11175        x -= getTotalPaddingLeft();
11176        // Clamp the position to inside of the view.
11177        x = Math.max(0.0f, x);
11178        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11179        x += getScrollX();
11180        return x;
11181    }
11182
11183    private int getLineAtCoordinate(float y) {
11184        y -= getTotalPaddingTop();
11185        // Clamp the position to inside of the view.
11186        y = Math.max(0.0f, y);
11187        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11188        y += getScrollY();
11189        return getLayout().getLineForVertical((int) y);
11190    }
11191
11192    private int getOffsetAtCoordinate(int line, float x) {
11193        x = convertToLocalHorizontalCoordinate(x);
11194        return getLayout().getOffsetForHorizontal(line, x);
11195    }
11196
11197    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11198     * in the view. Returns false when the position is in the empty space of left/right of text.
11199     */
11200    private boolean isPositionOnText(float x, float y) {
11201        if (getLayout() == null) return false;
11202
11203        final int line = getLineAtCoordinate(y);
11204        x = convertToLocalHorizontalCoordinate(x);
11205
11206        if (x < getLayout().getLineLeft(line)) return false;
11207        if (x > getLayout().getLineRight(line)) return false;
11208        return true;
11209    }
11210
11211    @Override
11212    public boolean onDragEvent(DragEvent event) {
11213        switch (event.getAction()) {
11214            case DragEvent.ACTION_DRAG_STARTED:
11215                return hasInsertionController();
11216
11217            case DragEvent.ACTION_DRAG_ENTERED:
11218                TextView.this.requestFocus();
11219                return true;
11220
11221            case DragEvent.ACTION_DRAG_LOCATION:
11222                final int offset = getOffsetForPosition(event.getX(), event.getY());
11223                Selection.setSelection((Spannable)mText, offset);
11224                return true;
11225
11226            case DragEvent.ACTION_DROP:
11227                onDrop(event);
11228                return true;
11229
11230            case DragEvent.ACTION_DRAG_ENDED:
11231            case DragEvent.ACTION_DRAG_EXITED:
11232            default:
11233                return true;
11234        }
11235    }
11236
11237    private void onDrop(DragEvent event) {
11238        StringBuilder content = new StringBuilder("");
11239        ClipData clipData = event.getClipData();
11240        final int itemCount = clipData.getItemCount();
11241        for (int i=0; i < itemCount; i++) {
11242            Item item = clipData.getItemAt(i);
11243            content.append(item.coerceToText(TextView.this.mContext));
11244        }
11245
11246        final int offset = getOffsetForPosition(event.getX(), event.getY());
11247
11248        Object localState = event.getLocalState();
11249        DragLocalState dragLocalState = null;
11250        if (localState instanceof DragLocalState) {
11251            dragLocalState = (DragLocalState) localState;
11252        }
11253        boolean dragDropIntoItself = dragLocalState != null &&
11254                dragLocalState.sourceTextView == this;
11255
11256        if (dragDropIntoItself) {
11257            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11258                // A drop inside the original selection discards the drop.
11259                return;
11260            }
11261        }
11262
11263        final int originalLength = mText.length();
11264        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11265        int min = extractRangeStartFromLong(minMax);
11266        int max = extractRangeEndFromLong(minMax);
11267
11268        Selection.setSelection((Spannable) mText, max);
11269        replaceText_internal(min, max, content);
11270
11271        if (dragDropIntoItself) {
11272            int dragSourceStart = dragLocalState.start;
11273            int dragSourceEnd = dragLocalState.end;
11274            if (max <= dragSourceStart) {
11275                // Inserting text before selection has shifted positions
11276                final int shift = mText.length() - originalLength;
11277                dragSourceStart += shift;
11278                dragSourceEnd += shift;
11279            }
11280
11281            // Delete original selection
11282            deleteText_internal(dragSourceStart, dragSourceEnd);
11283
11284            // Make sure we do not leave two adjacent spaces.
11285            if ((dragSourceStart == 0 ||
11286                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11287                    (dragSourceStart == mText.length() ||
11288                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11289                final int pos = dragSourceStart == mText.length() ?
11290                        dragSourceStart - 1 : dragSourceStart;
11291                deleteText_internal(pos, pos + 1);
11292            }
11293        }
11294    }
11295
11296    /**
11297     * @return True if this view supports insertion handles.
11298     */
11299    boolean hasInsertionController() {
11300        return mInsertionControllerEnabled;
11301    }
11302
11303    /**
11304     * @return True if this view supports selection handles.
11305     */
11306    boolean hasSelectionController() {
11307        return mSelectionControllerEnabled;
11308    }
11309
11310    InsertionPointCursorController getInsertionController() {
11311        if (!mInsertionControllerEnabled) {
11312            return null;
11313        }
11314
11315        if (mInsertionPointCursorController == null) {
11316            mInsertionPointCursorController = new InsertionPointCursorController();
11317
11318            final ViewTreeObserver observer = getViewTreeObserver();
11319            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11320        }
11321
11322        return mInsertionPointCursorController;
11323    }
11324
11325    SelectionModifierCursorController getSelectionController() {
11326        if (!mSelectionControllerEnabled) {
11327            return null;
11328        }
11329
11330        if (mSelectionModifierCursorController == null) {
11331            mSelectionModifierCursorController = new SelectionModifierCursorController();
11332
11333            final ViewTreeObserver observer = getViewTreeObserver();
11334            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11335        }
11336
11337        return mSelectionModifierCursorController;
11338    }
11339
11340    boolean isInBatchEditMode() {
11341        final InputMethodState ims = mInputMethodState;
11342        if (ims != null) {
11343            return ims.mBatchEditNesting > 0;
11344        }
11345        return mInBatchEditControllers;
11346    }
11347
11348    @Override
11349    protected void resolveTextDirection() {
11350        if (hasPasswordTransformationMethod()) {
11351            mTextDir = TextDirectionHeuristics.LOCALE;
11352            return;
11353        }
11354
11355        // Always need to resolve layout direction first
11356        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11357
11358        // Then resolve text direction on the parent
11359        super.resolveTextDirection();
11360
11361        // Now, we can select the heuristic
11362        int textDir = getResolvedTextDirection();
11363        switch (textDir) {
11364            default:
11365            case TEXT_DIRECTION_FIRST_STRONG:
11366                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11367                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11368                break;
11369            case TEXT_DIRECTION_ANY_RTL:
11370                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11371                break;
11372            case TEXT_DIRECTION_LTR:
11373                mTextDir = TextDirectionHeuristics.LTR;
11374                break;
11375            case TEXT_DIRECTION_RTL:
11376                mTextDir = TextDirectionHeuristics.RTL;
11377                break;
11378        }
11379    }
11380
11381    /**
11382     * Subclasses will need to override this method to implement their own way of resolving
11383     * drawables depending on the layout direction.
11384     *
11385     * A call to the super method will be required from the subclasses implementation.
11386     *
11387     */
11388    protected void resolveDrawables() {
11389        // No need to resolve twice
11390        if (mResolvedDrawables) {
11391            return;
11392        }
11393        // No drawable to resolve
11394        if (mDrawables == null) {
11395            return;
11396        }
11397        // No relative drawable to resolve
11398        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11399            mResolvedDrawables = true;
11400            return;
11401        }
11402
11403        Drawables dr = mDrawables;
11404        switch(getResolvedLayoutDirection()) {
11405            case LAYOUT_DIRECTION_RTL:
11406                if (dr.mDrawableStart != null) {
11407                    dr.mDrawableRight = dr.mDrawableStart;
11408
11409                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11410                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11411                }
11412                if (dr.mDrawableEnd != null) {
11413                    dr.mDrawableLeft = dr.mDrawableEnd;
11414
11415                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11416                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11417                }
11418                break;
11419
11420            case LAYOUT_DIRECTION_LTR:
11421            default:
11422                if (dr.mDrawableStart != null) {
11423                    dr.mDrawableLeft = dr.mDrawableStart;
11424
11425                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11426                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11427                }
11428                if (dr.mDrawableEnd != null) {
11429                    dr.mDrawableRight = dr.mDrawableEnd;
11430
11431                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11432                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11433                }
11434                break;
11435        }
11436        mResolvedDrawables = true;
11437    }
11438
11439    protected void resetResolvedDrawables() {
11440        mResolvedDrawables = false;
11441    }
11442
11443    /**
11444     * @hide
11445     */
11446    protected void viewClicked(InputMethodManager imm) {
11447        if (imm != null) {
11448            imm.viewClicked(this);
11449        }
11450    }
11451
11452    /**
11453     * Deletes the range of text [start, end[.
11454     * @hide
11455     */
11456    protected void deleteText_internal(int start, int end) {
11457        ((Editable) mText).delete(start, end);
11458    }
11459
11460    /**
11461     * Replaces the range of text [start, end[ by replacement text
11462     * @hide
11463     */
11464    protected void replaceText_internal(int start, int end, CharSequence text) {
11465        ((Editable) mText).replace(start, end, text);
11466    }
11467
11468    /**
11469     * Sets a span on the specified range of text
11470     * @hide
11471     */
11472    protected void setSpan_internal(Object span, int start, int end, int flags) {
11473        ((Editable) mText).setSpan(span, start, end, flags);
11474    }
11475
11476    /**
11477     * Moves the cursor to the specified offset position in text
11478     * @hide
11479     */
11480    protected void setCursorPosition_internal(int start, int end) {
11481        Selection.setSelection(((Editable) mText), start, end);
11482    }
11483
11484    @ViewDebug.ExportedProperty(category = "text")
11485    private CharSequence            mText;
11486    private CharSequence            mTransformed;
11487    private BufferType              mBufferType = BufferType.NORMAL;
11488
11489    private int                     mInputType = EditorInfo.TYPE_NULL;
11490    private CharSequence            mHint;
11491    private Layout                  mHintLayout;
11492
11493    private KeyListener             mInput;
11494
11495    private MovementMethod          mMovement;
11496    private TransformationMethod    mTransformation;
11497    private boolean                 mAllowTransformationLengthChange;
11498    private ChangeWatcher           mChangeWatcher;
11499
11500    private ArrayList<TextWatcher>  mListeners = null;
11501
11502    // display attributes
11503    private final TextPaint         mTextPaint;
11504    private boolean                 mUserSetTextScaleX;
11505    private final Paint             mHighlightPaint;
11506    private int                     mHighlightColor = 0x6633B5E5;
11507    /**
11508     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
11509     * this field being protected. Will be restored as private when lineHeight
11510     * feature request 3215097 is implemented
11511     * @hide
11512     */
11513    protected Layout                mLayout;
11514
11515    private long                    mShowCursor;
11516    private Blink                   mBlink;
11517    private boolean                 mCursorVisible = true;
11518
11519    // Cursor Controllers.
11520    private InsertionPointCursorController mInsertionPointCursorController;
11521    private SelectionModifierCursorController mSelectionModifierCursorController;
11522    private ActionMode              mSelectionActionMode;
11523    private boolean                 mInsertionControllerEnabled;
11524    private boolean                 mSelectionControllerEnabled;
11525    private boolean                 mInBatchEditControllers;
11526
11527    private boolean                 mSelectAllOnFocus = false;
11528
11529    private int                     mGravity = Gravity.TOP | Gravity.START;
11530    private boolean                 mHorizontallyScrolling;
11531
11532    private int                     mAutoLinkMask;
11533    private boolean                 mLinksClickable = true;
11534
11535    private float                   mSpacingMult = 1.0f;
11536    private float                   mSpacingAdd = 0.0f;
11537    private boolean                 mTextIsSelectable = false;
11538
11539    private static final int        LINES = 1;
11540    private static final int        EMS = LINES;
11541    private static final int        PIXELS = 2;
11542
11543    private int                     mMaximum = Integer.MAX_VALUE;
11544    private int                     mMaxMode = LINES;
11545    private int                     mMinimum = 0;
11546    private int                     mMinMode = LINES;
11547
11548    private int                     mOldMaximum = mMaximum;
11549    private int                     mOldMaxMode = mMaxMode;
11550
11551    private int                     mMaxWidth = Integer.MAX_VALUE;
11552    private int                     mMaxWidthMode = PIXELS;
11553    private int                     mMinWidth = 0;
11554    private int                     mMinWidthMode = PIXELS;
11555
11556    private boolean                 mSingleLine;
11557    private int                     mDesiredHeightAtMeasure = -1;
11558    private boolean                 mIncludePad = true;
11559
11560    // tmp primitives, so we don't alloc them on each draw
11561    private Path                    mHighlightPath;
11562    private boolean                 mHighlightPathBogus = true;
11563    private static final RectF      sTempRect = new RectF();
11564    private static final float[]    sTmpPosition = new float[2];
11565
11566    // XXX should be much larger
11567    private static final int        VERY_WIDE = 1024*1024;
11568
11569    private static final int        BLINK = 500;
11570
11571    private static final int ANIMATED_SCROLL_GAP = 250;
11572    private long mLastScroll;
11573    private Scroller mScroller = null;
11574
11575    private BoringLayout.Metrics mBoring;
11576    private BoringLayout.Metrics mHintBoring;
11577
11578    private BoringLayout mSavedLayout, mSavedHintLayout;
11579
11580    private TextDirectionHeuristic mTextDir = null;
11581
11582    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11583    private InputFilter[] mFilters = NO_FILTERS;
11584    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11585    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11586    // System wide time for last cut or copy action.
11587    private static long sLastCutOrCopyTime;
11588    // Used to highlight a word when it is corrected by the IME
11589    private CorrectionHighlighter mCorrectionHighlighter;
11590    // New state used to change background based on whether this TextView is multiline.
11591    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11592}
11593